1#![allow(rustdoc::private_intra_doc_links)]
    2//! This is the place where everything editor-related is stored (data-wise) and displayed (ui-wise).
    3//! The main point of interest in this crate is [`Editor`] type, which is used in every other Zed part as a user input element.
    4//! It comes in different flavors: single line, multiline and a fixed height one.
    5//!
    6//! Editor contains of multiple large submodules:
    7//! * [`element`] — the place where all rendering happens
    8//! * [`display_map`] - chunks up text in the editor into the logical blocks, establishes coordinates and mapping between each of them.
    9//!   Contains all metadata related to text transformations (folds, fake inlay text insertions, soft wraps, tab markup, etc.).
   10//! * [`inlay_hint_cache`] - is a storage of inlay hints out of LSP requests, responsible for querying LSP and updating `display_map`'s state accordingly.
   11//!
   12//! All other submodules and structs are mostly concerned with holding editor data about the way it displays current buffer region(s).
   13//!
   14//! If you're looking to improve Vim mode, you should check out Vim crate that wraps Editor and overrides its behavior.
   15pub mod actions;
   16mod blame_entry_tooltip;
   17mod blink_manager;
   18mod clangd_ext;
   19mod code_context_menus;
   20pub mod display_map;
   21mod editor_settings;
   22mod editor_settings_controls;
   23mod element;
   24mod git;
   25mod highlight_matching_bracket;
   26mod hover_links;
   27mod hover_popover;
   28mod hunk_diff;
   29mod indent_guides;
   30mod inlay_hint_cache;
   31pub mod items;
   32mod linked_editing_ranges;
   33mod lsp_ext;
   34mod mouse_context_menu;
   35pub mod movement;
   36mod persistence;
   37mod proposed_changes_editor;
   38mod rust_analyzer_ext;
   39pub mod scroll;
   40mod selections_collection;
   41pub mod tasks;
   42
   43#[cfg(test)]
   44mod editor_tests;
   45#[cfg(test)]
   46mod inline_completion_tests;
   47mod signature_help;
   48#[cfg(any(test, feature = "test-support"))]
   49pub mod test;
   50
   51use ::git::diff::DiffHunkStatus;
   52pub(crate) use actions::*;
   53pub use actions::{OpenExcerpts, OpenExcerptsSplit};
   54use aho_corasick::AhoCorasick;
   55use anyhow::{anyhow, Context as _, Result};
   56use blink_manager::BlinkManager;
   57use client::{Collaborator, ParticipantIndex};
   58use clock::ReplicaId;
   59use collections::{BTreeMap, Bound, HashMap, HashSet, VecDeque};
   60use convert_case::{Case, Casing};
   61use display_map::*;
   62pub use display_map::{DisplayPoint, FoldPlaceholder};
   63pub use editor_settings::{
   64    CurrentLineHighlight, EditorSettings, ScrollBeyondLastLine, SearchSettings, ShowScrollbar,
   65};
   66pub use editor_settings_controls::*;
   67use element::LineWithInvisibles;
   68pub use element::{
   69    CursorLayout, EditorElement, HighlightedRange, HighlightedRangeLine, PointForPosition,
   70};
   71use futures::{future, FutureExt};
   72use fuzzy::StringMatchCandidate;
   73
   74use code_context_menus::{
   75    AvailableCodeAction, CodeActionContents, CodeActionsItem, CodeActionsMenu, CodeContextMenu,
   76    CompletionEntry, CompletionsMenu, ContextMenuOrigin,
   77};
   78use git::blame::GitBlame;
   79use gpui::{
   80    div, impl_actions, point, prelude::*, px, relative, size, Action, AnyElement, AppContext,
   81    AsyncWindowContext, AvailableSpace, Bounds, ClipboardEntry, ClipboardItem, Context,
   82    DispatchPhase, ElementId, EventEmitter, FocusHandle, FocusOutEvent, FocusableView, FontId,
   83    FontWeight, Global, HighlightStyle, Hsla, InteractiveText, KeyContext, Model, ModelContext,
   84    MouseButton, PaintQuad, ParentElement, Pixels, Render, SharedString, Size, Styled, StyledText,
   85    Subscription, Task, TextStyle, TextStyleRefinement, UTF16Selection, UnderlineStyle,
   86    UniformListScrollHandle, View, ViewContext, ViewInputHandler, VisualContext, WeakFocusHandle,
   87    WeakView, WindowContext,
   88};
   89use highlight_matching_bracket::refresh_matching_bracket_highlights;
   90use hover_popover::{hide_hover, HoverState};
   91pub(crate) use hunk_diff::HoveredHunk;
   92use hunk_diff::{diff_hunk_to_display, DiffMap, DiffMapSnapshot};
   93use indent_guides::ActiveIndentGuidesState;
   94use inlay_hint_cache::{InlayHintCache, InlaySplice, InvalidationStrategy};
   95pub use inline_completion::Direction;
   96use inline_completion::{InlineCompletionProvider, InlineCompletionProviderHandle};
   97pub use items::MAX_TAB_TITLE_LEN;
   98use itertools::Itertools;
   99use language::{
  100    language_settings::{self, all_language_settings, language_settings, InlayHintSettings},
  101    markdown, point_from_lsp, AutoindentMode, BracketPair, Buffer, Capability, CharKind, CodeLabel,
  102    CursorShape, Diagnostic, Documentation, IndentKind, IndentSize, Language, OffsetRangeExt,
  103    Point, Selection, SelectionGoal, TransactionId,
  104};
  105use language::{point_to_lsp, BufferRow, CharClassifier, Runnable, RunnableRange};
  106use linked_editing_ranges::refresh_linked_ranges;
  107use mouse_context_menu::MouseContextMenu;
  108pub use proposed_changes_editor::{
  109    ProposedChangeLocation, ProposedChangesEditor, ProposedChangesEditorToolbar,
  110};
  111use similar::{ChangeTag, TextDiff};
  112use std::iter::Peekable;
  113use task::{ResolvedTask, TaskTemplate, TaskVariables};
  114
  115use hover_links::{find_file, HoverLink, HoveredLinkState, InlayHighlight};
  116pub use lsp::CompletionContext;
  117use lsp::{
  118    CompletionItemKind, CompletionTriggerKind, DiagnosticSeverity, InsertTextFormat,
  119    LanguageServerId, LanguageServerName,
  120};
  121
  122use movement::TextLayoutDetails;
  123pub use multi_buffer::{
  124    Anchor, AnchorRangeExt, ExcerptId, ExcerptRange, MultiBuffer, MultiBufferSnapshot, ToOffset,
  125    ToPoint,
  126};
  127use multi_buffer::{
  128    ExpandExcerptDirection, MultiBufferDiffHunk, MultiBufferPoint, MultiBufferRow, ToOffsetUtf16,
  129};
  130use project::{
  131    buffer_store::BufferChangeSet,
  132    lsp_store::{FormatTrigger, LspFormatTarget, OpenLspBufferHandle},
  133    project_settings::{GitGutterSetting, ProjectSettings},
  134    CodeAction, Completion, CompletionIntent, DocumentHighlight, InlayHint, Location, LocationLink,
  135    LspStore, PrepareRenameResponse, Project, ProjectItem, ProjectTransaction, TaskSourceKind,
  136};
  137use rand::prelude::*;
  138use rpc::{proto::*, ErrorExt};
  139use scroll::{Autoscroll, OngoingScroll, ScrollAnchor, ScrollManager, ScrollbarAutoHide};
  140use selections_collection::{
  141    resolve_selections, MutableSelectionsCollection, SelectionsCollection,
  142};
  143use serde::{Deserialize, Serialize};
  144use settings::{update_settings_file, Settings, SettingsLocation, SettingsStore};
  145use smallvec::SmallVec;
  146use snippet::Snippet;
  147use std::{
  148    any::TypeId,
  149    borrow::Cow,
  150    cell::RefCell,
  151    cmp::{self, Ordering, Reverse},
  152    mem,
  153    num::NonZeroU32,
  154    ops::{ControlFlow, Deref, DerefMut, Not as _, Range, RangeInclusive},
  155    path::{Path, PathBuf},
  156    rc::Rc,
  157    sync::Arc,
  158    time::{Duration, Instant},
  159};
  160pub use sum_tree::Bias;
  161use sum_tree::TreeMap;
  162use text::{BufferId, OffsetUtf16, Rope};
  163use theme::{
  164    observe_buffer_font_size_adjustment, ActiveTheme, PlayerColor, StatusColors, SyntaxTheme,
  165    ThemeColors, ThemeSettings,
  166};
  167use ui::{
  168    h_flex, prelude::*, ButtonSize, ButtonStyle, Disclosure, IconButton, IconName, IconSize,
  169    PopoverMenuHandle, Tooltip,
  170};
  171use util::{defer, maybe, post_inc, RangeExt, ResultExt, TryFutureExt};
  172use workspace::item::{ItemHandle, PreviewTabsSettings};
  173use workspace::notifications::{DetachAndPromptErr, NotificationId, NotifyTaskExt};
  174use workspace::{
  175    searchable::SearchEvent, ItemNavHistory, SplitDirection, ViewId, Workspace, WorkspaceId,
  176};
  177use workspace::{Item as WorkspaceItem, OpenInTerminal, OpenTerminal, TabBarSettings, Toast};
  178
  179use crate::hover_links::{find_url, find_url_from_range};
  180use crate::signature_help::{SignatureHelpHiddenBy, SignatureHelpState};
  181
  182pub const FILE_HEADER_HEIGHT: u32 = 2;
  183pub const MULTI_BUFFER_EXCERPT_HEADER_HEIGHT: u32 = 1;
  184pub const MULTI_BUFFER_EXCERPT_FOOTER_HEIGHT: u32 = 1;
  185pub const DEFAULT_MULTIBUFFER_CONTEXT: u32 = 2;
  186const CURSOR_BLINK_INTERVAL: Duration = Duration::from_millis(500);
  187const MAX_LINE_LEN: usize = 1024;
  188const MIN_NAVIGATION_HISTORY_ROW_DELTA: i64 = 10;
  189const MAX_SELECTION_HISTORY_LEN: usize = 1024;
  190pub(crate) const CURSORS_VISIBLE_FOR: Duration = Duration::from_millis(2000);
  191#[doc(hidden)]
  192pub const CODE_ACTIONS_DEBOUNCE_TIMEOUT: Duration = Duration::from_millis(250);
  193
  194pub(crate) const FORMAT_TIMEOUT: Duration = Duration::from_secs(2);
  195pub(crate) const SCROLL_CENTER_TOP_BOTTOM_DEBOUNCE_TIMEOUT: Duration = Duration::from_secs(1);
  196
  197pub fn render_parsed_markdown(
  198    element_id: impl Into<ElementId>,
  199    parsed: &language::ParsedMarkdown,
  200    editor_style: &EditorStyle,
  201    workspace: Option<WeakView<Workspace>>,
  202    cx: &mut WindowContext,
  203) -> InteractiveText {
  204    let code_span_background_color = cx
  205        .theme()
  206        .colors()
  207        .editor_document_highlight_read_background;
  208
  209    let highlights = gpui::combine_highlights(
  210        parsed.highlights.iter().filter_map(|(range, highlight)| {
  211            let highlight = highlight.to_highlight_style(&editor_style.syntax)?;
  212            Some((range.clone(), highlight))
  213        }),
  214        parsed
  215            .regions
  216            .iter()
  217            .zip(&parsed.region_ranges)
  218            .filter_map(|(region, range)| {
  219                if region.code {
  220                    Some((
  221                        range.clone(),
  222                        HighlightStyle {
  223                            background_color: Some(code_span_background_color),
  224                            ..Default::default()
  225                        },
  226                    ))
  227                } else {
  228                    None
  229                }
  230            }),
  231    );
  232
  233    let mut links = Vec::new();
  234    let mut link_ranges = Vec::new();
  235    for (range, region) in parsed.region_ranges.iter().zip(&parsed.regions) {
  236        if let Some(link) = region.link.clone() {
  237            links.push(link);
  238            link_ranges.push(range.clone());
  239        }
  240    }
  241
  242    InteractiveText::new(
  243        element_id,
  244        StyledText::new(parsed.text.clone()).with_highlights(&editor_style.text, highlights),
  245    )
  246    .on_click(link_ranges, move |clicked_range_ix, cx| {
  247        match &links[clicked_range_ix] {
  248            markdown::Link::Web { url } => cx.open_url(url),
  249            markdown::Link::Path { path } => {
  250                if let Some(workspace) = &workspace {
  251                    _ = workspace.update(cx, |workspace, cx| {
  252                        workspace.open_abs_path(path.clone(), false, cx).detach();
  253                    });
  254                }
  255            }
  256        }
  257    })
  258}
  259
  260#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
  261pub enum InlayId {
  262    InlineCompletion(usize),
  263    Hint(usize),
  264}
  265
  266impl InlayId {
  267    fn id(&self) -> usize {
  268        match self {
  269            Self::InlineCompletion(id) => *id,
  270            Self::Hint(id) => *id,
  271        }
  272    }
  273}
  274
  275enum DiffRowHighlight {}
  276enum DocumentHighlightRead {}
  277enum DocumentHighlightWrite {}
  278enum InputComposition {}
  279
  280#[derive(Debug, Copy, Clone, PartialEq, Eq)]
  281pub enum Navigated {
  282    Yes,
  283    No,
  284}
  285
  286impl Navigated {
  287    pub fn from_bool(yes: bool) -> Navigated {
  288        if yes {
  289            Navigated::Yes
  290        } else {
  291            Navigated::No
  292        }
  293    }
  294}
  295
  296pub fn init_settings(cx: &mut AppContext) {
  297    EditorSettings::register(cx);
  298}
  299
  300pub fn init(cx: &mut AppContext) {
  301    init_settings(cx);
  302
  303    workspace::register_project_item::<Editor>(cx);
  304    workspace::FollowableViewRegistry::register::<Editor>(cx);
  305    workspace::register_serializable_item::<Editor>(cx);
  306
  307    cx.observe_new_views(
  308        |workspace: &mut Workspace, _cx: &mut ViewContext<Workspace>| {
  309            workspace.register_action(Editor::new_file);
  310            workspace.register_action(Editor::new_file_vertical);
  311            workspace.register_action(Editor::new_file_horizontal);
  312        },
  313    )
  314    .detach();
  315
  316    cx.on_action(move |_: &workspace::NewFile, cx| {
  317        let app_state = workspace::AppState::global(cx);
  318        if let Some(app_state) = app_state.upgrade() {
  319            workspace::open_new(Default::default(), app_state, cx, |workspace, cx| {
  320                Editor::new_file(workspace, &Default::default(), cx)
  321            })
  322            .detach();
  323        }
  324    });
  325    cx.on_action(move |_: &workspace::NewWindow, cx| {
  326        let app_state = workspace::AppState::global(cx);
  327        if let Some(app_state) = app_state.upgrade() {
  328            workspace::open_new(Default::default(), app_state, cx, |workspace, cx| {
  329                Editor::new_file(workspace, &Default::default(), cx)
  330            })
  331            .detach();
  332        }
  333    });
  334    git::project_diff::init(cx);
  335}
  336
  337pub struct SearchWithinRange;
  338
  339trait InvalidationRegion {
  340    fn ranges(&self) -> &[Range<Anchor>];
  341}
  342
  343#[derive(Clone, Debug, PartialEq)]
  344pub enum SelectPhase {
  345    Begin {
  346        position: DisplayPoint,
  347        add: bool,
  348        click_count: usize,
  349    },
  350    BeginColumnar {
  351        position: DisplayPoint,
  352        reset: bool,
  353        goal_column: u32,
  354    },
  355    Extend {
  356        position: DisplayPoint,
  357        click_count: usize,
  358    },
  359    Update {
  360        position: DisplayPoint,
  361        goal_column: u32,
  362        scroll_delta: gpui::Point<f32>,
  363    },
  364    End,
  365}
  366
  367#[derive(Clone, Debug)]
  368pub enum SelectMode {
  369    Character,
  370    Word(Range<Anchor>),
  371    Line(Range<Anchor>),
  372    All,
  373}
  374
  375#[derive(Copy, Clone, PartialEq, Eq, Debug)]
  376pub enum EditorMode {
  377    SingleLine { auto_width: bool },
  378    AutoHeight { max_lines: usize },
  379    Full,
  380}
  381
  382#[derive(Copy, Clone, Debug)]
  383pub enum SoftWrap {
  384    /// Prefer not to wrap at all.
  385    ///
  386    /// Note: this is currently internal, as actually limited by [`crate::MAX_LINE_LEN`] until it wraps.
  387    /// The mode is used inside git diff hunks, where it's seems currently more useful to not wrap as much as possible.
  388    GitDiff,
  389    /// Prefer a single line generally, unless an overly long line is encountered.
  390    None,
  391    /// Soft wrap lines that exceed the editor width.
  392    EditorWidth,
  393    /// Soft wrap lines at the preferred line length.
  394    Column(u32),
  395    /// Soft wrap line at the preferred line length or the editor width (whichever is smaller).
  396    Bounded(u32),
  397}
  398
  399#[derive(Clone)]
  400pub struct EditorStyle {
  401    pub background: Hsla,
  402    pub local_player: PlayerColor,
  403    pub text: TextStyle,
  404    pub scrollbar_width: Pixels,
  405    pub syntax: Arc<SyntaxTheme>,
  406    pub status: StatusColors,
  407    pub inlay_hints_style: HighlightStyle,
  408    pub inline_completion_styles: InlineCompletionStyles,
  409    pub unnecessary_code_fade: f32,
  410}
  411
  412impl Default for EditorStyle {
  413    fn default() -> Self {
  414        Self {
  415            background: Hsla::default(),
  416            local_player: PlayerColor::default(),
  417            text: TextStyle::default(),
  418            scrollbar_width: Pixels::default(),
  419            syntax: Default::default(),
  420            // HACK: Status colors don't have a real default.
  421            // We should look into removing the status colors from the editor
  422            // style and retrieve them directly from the theme.
  423            status: StatusColors::dark(),
  424            inlay_hints_style: HighlightStyle::default(),
  425            inline_completion_styles: InlineCompletionStyles {
  426                insertion: HighlightStyle::default(),
  427                whitespace: HighlightStyle::default(),
  428            },
  429            unnecessary_code_fade: Default::default(),
  430        }
  431    }
  432}
  433
  434pub fn make_inlay_hints_style(cx: &WindowContext) -> HighlightStyle {
  435    let show_background = language_settings::language_settings(None, None, cx)
  436        .inlay_hints
  437        .show_background;
  438
  439    HighlightStyle {
  440        color: Some(cx.theme().status().hint),
  441        background_color: show_background.then(|| cx.theme().status().hint_background),
  442        ..HighlightStyle::default()
  443    }
  444}
  445
  446pub fn make_suggestion_styles(cx: &WindowContext) -> InlineCompletionStyles {
  447    InlineCompletionStyles {
  448        insertion: HighlightStyle {
  449            color: Some(cx.theme().status().predictive),
  450            ..HighlightStyle::default()
  451        },
  452        whitespace: HighlightStyle {
  453            background_color: Some(cx.theme().status().created_background),
  454            ..HighlightStyle::default()
  455        },
  456    }
  457}
  458
  459type CompletionId = usize;
  460
  461#[derive(Debug, Clone)]
  462enum InlineCompletionMenuHint {
  463    Loading,
  464    Loaded { text: InlineCompletionText },
  465    None,
  466}
  467
  468impl InlineCompletionMenuHint {
  469    pub fn label(&self) -> &'static str {
  470        match self {
  471            InlineCompletionMenuHint::Loading | InlineCompletionMenuHint::Loaded { .. } => {
  472                "Edit Prediction"
  473            }
  474            InlineCompletionMenuHint::None => "No Prediction",
  475        }
  476    }
  477}
  478
  479#[derive(Clone, Debug)]
  480enum InlineCompletionText {
  481    Move(SharedString),
  482    Edit {
  483        text: SharedString,
  484        highlights: Vec<(Range<usize>, HighlightStyle)>,
  485    },
  486}
  487
  488enum InlineCompletion {
  489    Edit(Vec<(Range<Anchor>, String)>),
  490    Move(Anchor),
  491}
  492
  493struct InlineCompletionState {
  494    inlay_ids: Vec<InlayId>,
  495    completion: InlineCompletion,
  496    invalidation_range: Range<Anchor>,
  497}
  498
  499enum InlineCompletionHighlight {}
  500
  501#[derive(Copy, Clone, Eq, PartialEq, PartialOrd, Ord, Debug, Default)]
  502struct EditorActionId(usize);
  503
  504impl EditorActionId {
  505    pub fn post_inc(&mut self) -> Self {
  506        let answer = self.0;
  507
  508        *self = Self(answer + 1);
  509
  510        Self(answer)
  511    }
  512}
  513
  514// type GetFieldEditorTheme = dyn Fn(&theme::Theme) -> theme::FieldEditor;
  515// type OverrideTextStyle = dyn Fn(&EditorStyle) -> Option<HighlightStyle>;
  516
  517type BackgroundHighlight = (fn(&ThemeColors) -> Hsla, Arc<[Range<Anchor>]>);
  518type GutterHighlight = (fn(&AppContext) -> Hsla, Arc<[Range<Anchor>]>);
  519
  520#[derive(Default)]
  521struct ScrollbarMarkerState {
  522    scrollbar_size: Size<Pixels>,
  523    dirty: bool,
  524    markers: Arc<[PaintQuad]>,
  525    pending_refresh: Option<Task<Result<()>>>,
  526}
  527
  528impl ScrollbarMarkerState {
  529    fn should_refresh(&self, scrollbar_size: Size<Pixels>) -> bool {
  530        self.pending_refresh.is_none() && (self.scrollbar_size != scrollbar_size || self.dirty)
  531    }
  532}
  533
  534#[derive(Clone, Debug)]
  535struct RunnableTasks {
  536    templates: Vec<(TaskSourceKind, TaskTemplate)>,
  537    offset: MultiBufferOffset,
  538    // We need the column at which the task context evaluation should take place (when we're spawning it via gutter).
  539    column: u32,
  540    // Values of all named captures, including those starting with '_'
  541    extra_variables: HashMap<String, String>,
  542    // Full range of the tagged region. We use it to determine which `extra_variables` to grab for context resolution in e.g. a modal.
  543    context_range: Range<BufferOffset>,
  544}
  545
  546impl RunnableTasks {
  547    fn resolve<'a>(
  548        &'a self,
  549        cx: &'a task::TaskContext,
  550    ) -> impl Iterator<Item = (TaskSourceKind, ResolvedTask)> + 'a {
  551        self.templates.iter().filter_map(|(kind, template)| {
  552            template
  553                .resolve_task(&kind.to_id_base(), cx)
  554                .map(|task| (kind.clone(), task))
  555        })
  556    }
  557}
  558
  559#[derive(Clone)]
  560struct ResolvedTasks {
  561    templates: SmallVec<[(TaskSourceKind, ResolvedTask); 1]>,
  562    position: Anchor,
  563}
  564#[derive(Copy, Clone, Debug)]
  565struct MultiBufferOffset(usize);
  566#[derive(Copy, Clone, Debug, PartialEq, PartialOrd)]
  567struct BufferOffset(usize);
  568
  569// Addons allow storing per-editor state in other crates (e.g. Vim)
  570pub trait Addon: 'static {
  571    fn extend_key_context(&self, _: &mut KeyContext, _: &AppContext) {}
  572
  573    fn to_any(&self) -> &dyn std::any::Any;
  574}
  575
  576#[derive(Debug, Copy, Clone, PartialEq, Eq)]
  577pub enum IsVimMode {
  578    Yes,
  579    No,
  580}
  581
  582/// Zed's primary text input `View`, allowing users to edit a [`MultiBuffer`]
  583///
  584/// See the [module level documentation](self) for more information.
  585pub struct Editor {
  586    focus_handle: FocusHandle,
  587    last_focused_descendant: Option<WeakFocusHandle>,
  588    /// The text buffer being edited
  589    buffer: Model<MultiBuffer>,
  590    /// Map of how text in the buffer should be displayed.
  591    /// Handles soft wraps, folds, fake inlay text insertions, etc.
  592    pub display_map: Model<DisplayMap>,
  593    pub selections: SelectionsCollection,
  594    pub scroll_manager: ScrollManager,
  595    /// When inline assist editors are linked, they all render cursors because
  596    /// typing enters text into each of them, even the ones that aren't focused.
  597    pub(crate) show_cursor_when_unfocused: bool,
  598    columnar_selection_tail: Option<Anchor>,
  599    add_selections_state: Option<AddSelectionsState>,
  600    select_next_state: Option<SelectNextState>,
  601    select_prev_state: Option<SelectNextState>,
  602    selection_history: SelectionHistory,
  603    autoclose_regions: Vec<AutocloseRegion>,
  604    snippet_stack: InvalidationStack<SnippetState>,
  605    select_larger_syntax_node_stack: Vec<Box<[Selection<usize>]>>,
  606    ime_transaction: Option<TransactionId>,
  607    active_diagnostics: Option<ActiveDiagnosticGroup>,
  608    soft_wrap_mode_override: Option<language_settings::SoftWrap>,
  609
  610    project: Option<Model<Project>>,
  611    semantics_provider: Option<Rc<dyn SemanticsProvider>>,
  612    completion_provider: Option<Box<dyn CompletionProvider>>,
  613    collaboration_hub: Option<Box<dyn CollaborationHub>>,
  614    blink_manager: Model<BlinkManager>,
  615    show_cursor_names: bool,
  616    hovered_cursors: HashMap<HoveredCursor, Task<()>>,
  617    pub show_local_selections: bool,
  618    mode: EditorMode,
  619    show_breadcrumbs: bool,
  620    show_gutter: bool,
  621    show_scrollbars: bool,
  622    show_line_numbers: Option<bool>,
  623    use_relative_line_numbers: Option<bool>,
  624    show_git_diff_gutter: Option<bool>,
  625    show_code_actions: Option<bool>,
  626    show_runnables: Option<bool>,
  627    show_wrap_guides: Option<bool>,
  628    show_indent_guides: Option<bool>,
  629    placeholder_text: Option<Arc<str>>,
  630    highlight_order: usize,
  631    highlighted_rows: HashMap<TypeId, Vec<RowHighlight>>,
  632    background_highlights: TreeMap<TypeId, BackgroundHighlight>,
  633    gutter_highlights: TreeMap<TypeId, GutterHighlight>,
  634    scrollbar_marker_state: ScrollbarMarkerState,
  635    active_indent_guides_state: ActiveIndentGuidesState,
  636    nav_history: Option<ItemNavHistory>,
  637    context_menu: RefCell<Option<CodeContextMenu>>,
  638    mouse_context_menu: Option<MouseContextMenu>,
  639    hunk_controls_menu_handle: PopoverMenuHandle<ui::ContextMenu>,
  640    completion_tasks: Vec<(CompletionId, Task<Option<()>>)>,
  641    signature_help_state: SignatureHelpState,
  642    auto_signature_help: Option<bool>,
  643    find_all_references_task_sources: Vec<Anchor>,
  644    next_completion_id: CompletionId,
  645    available_code_actions: Option<(Location, Rc<[AvailableCodeAction]>)>,
  646    code_actions_task: Option<Task<Result<()>>>,
  647    document_highlights_task: Option<Task<()>>,
  648    linked_editing_range_task: Option<Task<Option<()>>>,
  649    linked_edit_ranges: linked_editing_ranges::LinkedEditingRanges,
  650    pending_rename: Option<RenameState>,
  651    searchable: bool,
  652    cursor_shape: CursorShape,
  653    current_line_highlight: Option<CurrentLineHighlight>,
  654    collapse_matches: bool,
  655    autoindent_mode: Option<AutoindentMode>,
  656    workspace: Option<(WeakView<Workspace>, Option<WorkspaceId>)>,
  657    input_enabled: bool,
  658    use_modal_editing: bool,
  659    read_only: bool,
  660    leader_peer_id: Option<PeerId>,
  661    remote_id: Option<ViewId>,
  662    hover_state: HoverState,
  663    gutter_hovered: bool,
  664    hovered_link_state: Option<HoveredLinkState>,
  665    inline_completion_provider: Option<RegisteredInlineCompletionProvider>,
  666    code_action_providers: Vec<Rc<dyn CodeActionProvider>>,
  667    active_inline_completion: Option<InlineCompletionState>,
  668    // enable_inline_completions is a switch that Vim can use to disable
  669    // inline completions based on its mode.
  670    enable_inline_completions: bool,
  671    show_inline_completions_override: Option<bool>,
  672    inlay_hint_cache: InlayHintCache,
  673    diff_map: DiffMap,
  674    next_inlay_id: usize,
  675    _subscriptions: Vec<Subscription>,
  676    pixel_position_of_newest_cursor: Option<gpui::Point<Pixels>>,
  677    gutter_dimensions: GutterDimensions,
  678    style: Option<EditorStyle>,
  679    text_style_refinement: Option<TextStyleRefinement>,
  680    next_editor_action_id: EditorActionId,
  681    editor_actions: Rc<RefCell<BTreeMap<EditorActionId, Box<dyn Fn(&mut ViewContext<Self>)>>>>,
  682    use_autoclose: bool,
  683    use_auto_surround: bool,
  684    auto_replace_emoji_shortcode: bool,
  685    show_git_blame_gutter: bool,
  686    show_git_blame_inline: bool,
  687    show_git_blame_inline_delay_task: Option<Task<()>>,
  688    git_blame_inline_enabled: bool,
  689    serialize_dirty_buffers: bool,
  690    show_selection_menu: Option<bool>,
  691    blame: Option<Model<GitBlame>>,
  692    blame_subscription: Option<Subscription>,
  693    custom_context_menu: Option<
  694        Box<
  695            dyn 'static
  696                + Fn(&mut Self, DisplayPoint, &mut ViewContext<Self>) -> Option<View<ui::ContextMenu>>,
  697        >,
  698    >,
  699    last_bounds: Option<Bounds<Pixels>>,
  700    expect_bounds_change: Option<Bounds<Pixels>>,
  701    tasks: BTreeMap<(BufferId, BufferRow), RunnableTasks>,
  702    tasks_update_task: Option<Task<()>>,
  703    previous_search_ranges: Option<Arc<[Range<Anchor>]>>,
  704    breadcrumb_header: Option<String>,
  705    focused_block: Option<FocusedBlock>,
  706    next_scroll_position: NextScrollCursorCenterTopBottom,
  707    addons: HashMap<TypeId, Box<dyn Addon>>,
  708    registered_buffers: HashMap<BufferId, OpenLspBufferHandle>,
  709    toggle_fold_multiple_buffers: Task<()>,
  710    _scroll_cursor_center_top_bottom_task: Task<()>,
  711}
  712
  713#[derive(Copy, Clone, Debug, PartialEq, Eq, Default)]
  714enum NextScrollCursorCenterTopBottom {
  715    #[default]
  716    Center,
  717    Top,
  718    Bottom,
  719}
  720
  721impl NextScrollCursorCenterTopBottom {
  722    fn next(&self) -> Self {
  723        match self {
  724            Self::Center => Self::Top,
  725            Self::Top => Self::Bottom,
  726            Self::Bottom => Self::Center,
  727        }
  728    }
  729}
  730
  731#[derive(Clone)]
  732pub struct EditorSnapshot {
  733    pub mode: EditorMode,
  734    show_gutter: bool,
  735    show_line_numbers: Option<bool>,
  736    show_git_diff_gutter: Option<bool>,
  737    show_code_actions: Option<bool>,
  738    show_runnables: Option<bool>,
  739    git_blame_gutter_max_author_length: Option<usize>,
  740    pub display_snapshot: DisplaySnapshot,
  741    pub placeholder_text: Option<Arc<str>>,
  742    diff_map: DiffMapSnapshot,
  743    is_focused: bool,
  744    scroll_anchor: ScrollAnchor,
  745    ongoing_scroll: OngoingScroll,
  746    current_line_highlight: CurrentLineHighlight,
  747    gutter_hovered: bool,
  748}
  749
  750const GIT_BLAME_MAX_AUTHOR_CHARS_DISPLAYED: usize = 20;
  751
  752#[derive(Default, Debug, Clone, Copy)]
  753pub struct GutterDimensions {
  754    pub left_padding: Pixels,
  755    pub right_padding: Pixels,
  756    pub width: Pixels,
  757    pub margin: Pixels,
  758    pub git_blame_entries_width: Option<Pixels>,
  759}
  760
  761impl GutterDimensions {
  762    /// The full width of the space taken up by the gutter.
  763    pub fn full_width(&self) -> Pixels {
  764        self.margin + self.width
  765    }
  766
  767    /// The width of the space reserved for the fold indicators,
  768    /// use alongside 'justify_end' and `gutter_width` to
  769    /// right align content with the line numbers
  770    pub fn fold_area_width(&self) -> Pixels {
  771        self.margin + self.right_padding
  772    }
  773}
  774
  775#[derive(Debug)]
  776pub struct RemoteSelection {
  777    pub replica_id: ReplicaId,
  778    pub selection: Selection<Anchor>,
  779    pub cursor_shape: CursorShape,
  780    pub peer_id: PeerId,
  781    pub line_mode: bool,
  782    pub participant_index: Option<ParticipantIndex>,
  783    pub user_name: Option<SharedString>,
  784}
  785
  786#[derive(Clone, Debug)]
  787struct SelectionHistoryEntry {
  788    selections: Arc<[Selection<Anchor>]>,
  789    select_next_state: Option<SelectNextState>,
  790    select_prev_state: Option<SelectNextState>,
  791    add_selections_state: Option<AddSelectionsState>,
  792}
  793
  794enum SelectionHistoryMode {
  795    Normal,
  796    Undoing,
  797    Redoing,
  798}
  799
  800#[derive(Clone, PartialEq, Eq, Hash)]
  801struct HoveredCursor {
  802    replica_id: u16,
  803    selection_id: usize,
  804}
  805
  806impl Default for SelectionHistoryMode {
  807    fn default() -> Self {
  808        Self::Normal
  809    }
  810}
  811
  812#[derive(Default)]
  813struct SelectionHistory {
  814    #[allow(clippy::type_complexity)]
  815    selections_by_transaction:
  816        HashMap<TransactionId, (Arc<[Selection<Anchor>]>, Option<Arc<[Selection<Anchor>]>>)>,
  817    mode: SelectionHistoryMode,
  818    undo_stack: VecDeque<SelectionHistoryEntry>,
  819    redo_stack: VecDeque<SelectionHistoryEntry>,
  820}
  821
  822impl SelectionHistory {
  823    fn insert_transaction(
  824        &mut self,
  825        transaction_id: TransactionId,
  826        selections: Arc<[Selection<Anchor>]>,
  827    ) {
  828        self.selections_by_transaction
  829            .insert(transaction_id, (selections, None));
  830    }
  831
  832    #[allow(clippy::type_complexity)]
  833    fn transaction(
  834        &self,
  835        transaction_id: TransactionId,
  836    ) -> Option<&(Arc<[Selection<Anchor>]>, Option<Arc<[Selection<Anchor>]>>)> {
  837        self.selections_by_transaction.get(&transaction_id)
  838    }
  839
  840    #[allow(clippy::type_complexity)]
  841    fn transaction_mut(
  842        &mut self,
  843        transaction_id: TransactionId,
  844    ) -> Option<&mut (Arc<[Selection<Anchor>]>, Option<Arc<[Selection<Anchor>]>>)> {
  845        self.selections_by_transaction.get_mut(&transaction_id)
  846    }
  847
  848    fn push(&mut self, entry: SelectionHistoryEntry) {
  849        if !entry.selections.is_empty() {
  850            match self.mode {
  851                SelectionHistoryMode::Normal => {
  852                    self.push_undo(entry);
  853                    self.redo_stack.clear();
  854                }
  855                SelectionHistoryMode::Undoing => self.push_redo(entry),
  856                SelectionHistoryMode::Redoing => self.push_undo(entry),
  857            }
  858        }
  859    }
  860
  861    fn push_undo(&mut self, entry: SelectionHistoryEntry) {
  862        if self
  863            .undo_stack
  864            .back()
  865            .map_or(true, |e| e.selections != entry.selections)
  866        {
  867            self.undo_stack.push_back(entry);
  868            if self.undo_stack.len() > MAX_SELECTION_HISTORY_LEN {
  869                self.undo_stack.pop_front();
  870            }
  871        }
  872    }
  873
  874    fn push_redo(&mut self, entry: SelectionHistoryEntry) {
  875        if self
  876            .redo_stack
  877            .back()
  878            .map_or(true, |e| e.selections != entry.selections)
  879        {
  880            self.redo_stack.push_back(entry);
  881            if self.redo_stack.len() > MAX_SELECTION_HISTORY_LEN {
  882                self.redo_stack.pop_front();
  883            }
  884        }
  885    }
  886}
  887
  888struct RowHighlight {
  889    index: usize,
  890    range: Range<Anchor>,
  891    color: Hsla,
  892    should_autoscroll: bool,
  893}
  894
  895#[derive(Clone, Debug)]
  896struct AddSelectionsState {
  897    above: bool,
  898    stack: Vec<usize>,
  899}
  900
  901#[derive(Clone)]
  902struct SelectNextState {
  903    query: AhoCorasick,
  904    wordwise: bool,
  905    done: bool,
  906}
  907
  908impl std::fmt::Debug for SelectNextState {
  909    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
  910        f.debug_struct(std::any::type_name::<Self>())
  911            .field("wordwise", &self.wordwise)
  912            .field("done", &self.done)
  913            .finish()
  914    }
  915}
  916
  917#[derive(Debug)]
  918struct AutocloseRegion {
  919    selection_id: usize,
  920    range: Range<Anchor>,
  921    pair: BracketPair,
  922}
  923
  924#[derive(Debug)]
  925struct SnippetState {
  926    ranges: Vec<Vec<Range<Anchor>>>,
  927    active_index: usize,
  928    choices: Vec<Option<Vec<String>>>,
  929}
  930
  931#[doc(hidden)]
  932pub struct RenameState {
  933    pub range: Range<Anchor>,
  934    pub old_name: Arc<str>,
  935    pub editor: View<Editor>,
  936    block_id: CustomBlockId,
  937}
  938
  939struct InvalidationStack<T>(Vec<T>);
  940
  941struct RegisteredInlineCompletionProvider {
  942    provider: Arc<dyn InlineCompletionProviderHandle>,
  943    _subscription: Subscription,
  944}
  945
  946#[derive(Debug)]
  947struct ActiveDiagnosticGroup {
  948    primary_range: Range<Anchor>,
  949    primary_message: String,
  950    group_id: usize,
  951    blocks: HashMap<CustomBlockId, Diagnostic>,
  952    is_valid: bool,
  953}
  954
  955#[derive(Serialize, Deserialize, Clone, Debug)]
  956pub struct ClipboardSelection {
  957    pub len: usize,
  958    pub is_entire_line: bool,
  959    pub first_line_indent: u32,
  960}
  961
  962#[derive(Debug)]
  963pub(crate) struct NavigationData {
  964    cursor_anchor: Anchor,
  965    cursor_position: Point,
  966    scroll_anchor: ScrollAnchor,
  967    scroll_top_row: u32,
  968}
  969
  970#[derive(Debug, Clone, Copy, PartialEq, Eq)]
  971pub enum GotoDefinitionKind {
  972    Symbol,
  973    Declaration,
  974    Type,
  975    Implementation,
  976}
  977
  978#[derive(Debug, Clone)]
  979enum InlayHintRefreshReason {
  980    Toggle(bool),
  981    SettingsChange(InlayHintSettings),
  982    NewLinesShown,
  983    BufferEdited(HashSet<Arc<Language>>),
  984    RefreshRequested,
  985    ExcerptsRemoved(Vec<ExcerptId>),
  986}
  987
  988impl InlayHintRefreshReason {
  989    fn description(&self) -> &'static str {
  990        match self {
  991            Self::Toggle(_) => "toggle",
  992            Self::SettingsChange(_) => "settings change",
  993            Self::NewLinesShown => "new lines shown",
  994            Self::BufferEdited(_) => "buffer edited",
  995            Self::RefreshRequested => "refresh requested",
  996            Self::ExcerptsRemoved(_) => "excerpts removed",
  997        }
  998    }
  999}
 1000
 1001pub enum FormatTarget {
 1002    Buffers,
 1003    Ranges(Vec<Range<MultiBufferPoint>>),
 1004}
 1005
 1006pub(crate) struct FocusedBlock {
 1007    id: BlockId,
 1008    focus_handle: WeakFocusHandle,
 1009}
 1010
 1011#[derive(Clone)]
 1012enum JumpData {
 1013    MultiBufferRow {
 1014        row: MultiBufferRow,
 1015        line_offset_from_top: u32,
 1016    },
 1017    MultiBufferPoint {
 1018        excerpt_id: ExcerptId,
 1019        position: Point,
 1020        anchor: text::Anchor,
 1021        line_offset_from_top: u32,
 1022    },
 1023}
 1024
 1025impl Editor {
 1026    pub fn single_line(cx: &mut ViewContext<Self>) -> Self {
 1027        let buffer = cx.new_model(|cx| Buffer::local("", cx));
 1028        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1029        Self::new(
 1030            EditorMode::SingleLine { auto_width: false },
 1031            buffer,
 1032            None,
 1033            false,
 1034            cx,
 1035        )
 1036    }
 1037
 1038    pub fn multi_line(cx: &mut ViewContext<Self>) -> Self {
 1039        let buffer = cx.new_model(|cx| Buffer::local("", cx));
 1040        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1041        Self::new(EditorMode::Full, buffer, None, false, cx)
 1042    }
 1043
 1044    pub fn auto_width(cx: &mut ViewContext<Self>) -> Self {
 1045        let buffer = cx.new_model(|cx| Buffer::local("", cx));
 1046        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1047        Self::new(
 1048            EditorMode::SingleLine { auto_width: true },
 1049            buffer,
 1050            None,
 1051            false,
 1052            cx,
 1053        )
 1054    }
 1055
 1056    pub fn auto_height(max_lines: usize, cx: &mut ViewContext<Self>) -> Self {
 1057        let buffer = cx.new_model(|cx| Buffer::local("", cx));
 1058        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1059        Self::new(
 1060            EditorMode::AutoHeight { max_lines },
 1061            buffer,
 1062            None,
 1063            false,
 1064            cx,
 1065        )
 1066    }
 1067
 1068    pub fn for_buffer(
 1069        buffer: Model<Buffer>,
 1070        project: Option<Model<Project>>,
 1071        cx: &mut ViewContext<Self>,
 1072    ) -> Self {
 1073        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1074        Self::new(EditorMode::Full, buffer, project, false, cx)
 1075    }
 1076
 1077    pub fn for_multibuffer(
 1078        buffer: Model<MultiBuffer>,
 1079        project: Option<Model<Project>>,
 1080        show_excerpt_controls: bool,
 1081        cx: &mut ViewContext<Self>,
 1082    ) -> Self {
 1083        Self::new(EditorMode::Full, buffer, project, show_excerpt_controls, cx)
 1084    }
 1085
 1086    pub fn clone(&self, cx: &mut ViewContext<Self>) -> Self {
 1087        let show_excerpt_controls = self.display_map.read(cx).show_excerpt_controls();
 1088        let mut clone = Self::new(
 1089            self.mode,
 1090            self.buffer.clone(),
 1091            self.project.clone(),
 1092            show_excerpt_controls,
 1093            cx,
 1094        );
 1095        self.display_map.update(cx, |display_map, cx| {
 1096            let snapshot = display_map.snapshot(cx);
 1097            clone.display_map.update(cx, |display_map, cx| {
 1098                display_map.set_state(&snapshot, cx);
 1099            });
 1100        });
 1101        clone.selections.clone_state(&self.selections);
 1102        clone.scroll_manager.clone_state(&self.scroll_manager);
 1103        clone.searchable = self.searchable;
 1104        clone
 1105    }
 1106
 1107    pub fn new(
 1108        mode: EditorMode,
 1109        buffer: Model<MultiBuffer>,
 1110        project: Option<Model<Project>>,
 1111        show_excerpt_controls: bool,
 1112        cx: &mut ViewContext<Self>,
 1113    ) -> Self {
 1114        let style = cx.text_style();
 1115        let font_size = style.font_size.to_pixels(cx.rem_size());
 1116        let editor = cx.view().downgrade();
 1117        let fold_placeholder = FoldPlaceholder {
 1118            constrain_width: true,
 1119            render: Arc::new(move |fold_id, fold_range, cx| {
 1120                let editor = editor.clone();
 1121                div()
 1122                    .id(fold_id)
 1123                    .bg(cx.theme().colors().ghost_element_background)
 1124                    .hover(|style| style.bg(cx.theme().colors().ghost_element_hover))
 1125                    .active(|style| style.bg(cx.theme().colors().ghost_element_active))
 1126                    .rounded_sm()
 1127                    .size_full()
 1128                    .cursor_pointer()
 1129                    .child("⋯")
 1130                    .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
 1131                    .on_click(move |_, cx| {
 1132                        editor
 1133                            .update(cx, |editor, cx| {
 1134                                editor.unfold_ranges(
 1135                                    &[fold_range.start..fold_range.end],
 1136                                    true,
 1137                                    false,
 1138                                    cx,
 1139                                );
 1140                                cx.stop_propagation();
 1141                            })
 1142                            .ok();
 1143                    })
 1144                    .into_any()
 1145            }),
 1146            merge_adjacent: true,
 1147            ..Default::default()
 1148        };
 1149        let display_map = cx.new_model(|cx| {
 1150            DisplayMap::new(
 1151                buffer.clone(),
 1152                style.font(),
 1153                font_size,
 1154                None,
 1155                show_excerpt_controls,
 1156                FILE_HEADER_HEIGHT,
 1157                MULTI_BUFFER_EXCERPT_HEADER_HEIGHT,
 1158                MULTI_BUFFER_EXCERPT_FOOTER_HEIGHT,
 1159                fold_placeholder,
 1160                cx,
 1161            )
 1162        });
 1163
 1164        let selections = SelectionsCollection::new(display_map.clone(), buffer.clone());
 1165
 1166        let blink_manager = cx.new_model(|cx| BlinkManager::new(CURSOR_BLINK_INTERVAL, cx));
 1167
 1168        let soft_wrap_mode_override = matches!(mode, EditorMode::SingleLine { .. })
 1169            .then(|| language_settings::SoftWrap::None);
 1170
 1171        let mut project_subscriptions = Vec::new();
 1172        if mode == EditorMode::Full {
 1173            if let Some(project) = project.as_ref() {
 1174                if buffer.read(cx).is_singleton() {
 1175                    project_subscriptions.push(cx.observe(project, |_, _, cx| {
 1176                        cx.emit(EditorEvent::TitleChanged);
 1177                    }));
 1178                }
 1179                project_subscriptions.push(cx.subscribe(project, |editor, _, event, cx| {
 1180                    if let project::Event::RefreshInlayHints = event {
 1181                        editor.refresh_inlay_hints(InlayHintRefreshReason::RefreshRequested, cx);
 1182                    } else if let project::Event::SnippetEdit(id, snippet_edits) = event {
 1183                        if let Some(buffer) = editor.buffer.read(cx).buffer(*id) {
 1184                            let focus_handle = editor.focus_handle(cx);
 1185                            if focus_handle.is_focused(cx) {
 1186                                let snapshot = buffer.read(cx).snapshot();
 1187                                for (range, snippet) in snippet_edits {
 1188                                    let editor_range =
 1189                                        language::range_from_lsp(*range).to_offset(&snapshot);
 1190                                    editor
 1191                                        .insert_snippet(&[editor_range], snippet.clone(), cx)
 1192                                        .ok();
 1193                                }
 1194                            }
 1195                        }
 1196                    }
 1197                }));
 1198                if let Some(task_inventory) = project
 1199                    .read(cx)
 1200                    .task_store()
 1201                    .read(cx)
 1202                    .task_inventory()
 1203                    .cloned()
 1204                {
 1205                    project_subscriptions.push(cx.observe(&task_inventory, |editor, _, cx| {
 1206                        editor.tasks_update_task = Some(editor.refresh_runnables(cx));
 1207                    }));
 1208                }
 1209            }
 1210        }
 1211
 1212        let buffer_snapshot = buffer.read(cx).snapshot(cx);
 1213
 1214        let inlay_hint_settings =
 1215            inlay_hint_settings(selections.newest_anchor().head(), &buffer_snapshot, cx);
 1216        let focus_handle = cx.focus_handle();
 1217        cx.on_focus(&focus_handle, Self::handle_focus).detach();
 1218        cx.on_focus_in(&focus_handle, Self::handle_focus_in)
 1219            .detach();
 1220        cx.on_focus_out(&focus_handle, Self::handle_focus_out)
 1221            .detach();
 1222        cx.on_blur(&focus_handle, Self::handle_blur).detach();
 1223
 1224        let show_indent_guides = if matches!(mode, EditorMode::SingleLine { .. }) {
 1225            Some(false)
 1226        } else {
 1227            None
 1228        };
 1229
 1230        let mut code_action_providers = Vec::new();
 1231        if let Some(project) = project.clone() {
 1232            get_unstaged_changes_for_buffers(&project, buffer.read(cx).all_buffers(), cx);
 1233            code_action_providers.push(Rc::new(project) as Rc<_>);
 1234        }
 1235
 1236        let mut this = Self {
 1237            focus_handle,
 1238            show_cursor_when_unfocused: false,
 1239            last_focused_descendant: None,
 1240            buffer: buffer.clone(),
 1241            display_map: display_map.clone(),
 1242            selections,
 1243            scroll_manager: ScrollManager::new(cx),
 1244            columnar_selection_tail: None,
 1245            add_selections_state: None,
 1246            select_next_state: None,
 1247            select_prev_state: None,
 1248            selection_history: Default::default(),
 1249            autoclose_regions: Default::default(),
 1250            snippet_stack: Default::default(),
 1251            select_larger_syntax_node_stack: Vec::new(),
 1252            ime_transaction: Default::default(),
 1253            active_diagnostics: None,
 1254            soft_wrap_mode_override,
 1255            completion_provider: project.clone().map(|project| Box::new(project) as _),
 1256            semantics_provider: project.clone().map(|project| Rc::new(project) as _),
 1257            collaboration_hub: project.clone().map(|project| Box::new(project) as _),
 1258            project,
 1259            blink_manager: blink_manager.clone(),
 1260            show_local_selections: true,
 1261            show_scrollbars: true,
 1262            mode,
 1263            show_breadcrumbs: EditorSettings::get_global(cx).toolbar.breadcrumbs,
 1264            show_gutter: mode == EditorMode::Full,
 1265            show_line_numbers: None,
 1266            use_relative_line_numbers: None,
 1267            show_git_diff_gutter: None,
 1268            show_code_actions: None,
 1269            show_runnables: None,
 1270            show_wrap_guides: None,
 1271            show_indent_guides,
 1272            placeholder_text: None,
 1273            highlight_order: 0,
 1274            highlighted_rows: HashMap::default(),
 1275            background_highlights: Default::default(),
 1276            gutter_highlights: TreeMap::default(),
 1277            scrollbar_marker_state: ScrollbarMarkerState::default(),
 1278            active_indent_guides_state: ActiveIndentGuidesState::default(),
 1279            nav_history: None,
 1280            context_menu: RefCell::new(None),
 1281            mouse_context_menu: None,
 1282            hunk_controls_menu_handle: PopoverMenuHandle::default(),
 1283            completion_tasks: Default::default(),
 1284            signature_help_state: SignatureHelpState::default(),
 1285            auto_signature_help: None,
 1286            find_all_references_task_sources: Vec::new(),
 1287            next_completion_id: 0,
 1288            next_inlay_id: 0,
 1289            code_action_providers,
 1290            available_code_actions: Default::default(),
 1291            code_actions_task: Default::default(),
 1292            document_highlights_task: Default::default(),
 1293            linked_editing_range_task: Default::default(),
 1294            pending_rename: Default::default(),
 1295            searchable: true,
 1296            cursor_shape: EditorSettings::get_global(cx)
 1297                .cursor_shape
 1298                .unwrap_or_default(),
 1299            current_line_highlight: None,
 1300            autoindent_mode: Some(AutoindentMode::EachLine),
 1301            collapse_matches: false,
 1302            workspace: None,
 1303            input_enabled: true,
 1304            use_modal_editing: mode == EditorMode::Full,
 1305            read_only: false,
 1306            use_autoclose: true,
 1307            use_auto_surround: true,
 1308            auto_replace_emoji_shortcode: false,
 1309            leader_peer_id: None,
 1310            remote_id: None,
 1311            hover_state: Default::default(),
 1312            hovered_link_state: Default::default(),
 1313            inline_completion_provider: None,
 1314            active_inline_completion: None,
 1315            inlay_hint_cache: InlayHintCache::new(inlay_hint_settings),
 1316            diff_map: DiffMap::default(),
 1317            gutter_hovered: false,
 1318            pixel_position_of_newest_cursor: None,
 1319            last_bounds: None,
 1320            expect_bounds_change: None,
 1321            gutter_dimensions: GutterDimensions::default(),
 1322            style: None,
 1323            show_cursor_names: false,
 1324            hovered_cursors: Default::default(),
 1325            next_editor_action_id: EditorActionId::default(),
 1326            editor_actions: Rc::default(),
 1327            show_inline_completions_override: None,
 1328            enable_inline_completions: true,
 1329            custom_context_menu: None,
 1330            show_git_blame_gutter: false,
 1331            show_git_blame_inline: false,
 1332            show_selection_menu: None,
 1333            show_git_blame_inline_delay_task: None,
 1334            git_blame_inline_enabled: ProjectSettings::get_global(cx).git.inline_blame_enabled(),
 1335            serialize_dirty_buffers: ProjectSettings::get_global(cx)
 1336                .session
 1337                .restore_unsaved_buffers,
 1338            blame: None,
 1339            blame_subscription: None,
 1340            tasks: Default::default(),
 1341            _subscriptions: vec![
 1342                cx.observe(&buffer, Self::on_buffer_changed),
 1343                cx.subscribe(&buffer, Self::on_buffer_event),
 1344                cx.observe(&display_map, Self::on_display_map_changed),
 1345                cx.observe(&blink_manager, |_, _, cx| cx.notify()),
 1346                cx.observe_global::<SettingsStore>(Self::settings_changed),
 1347                observe_buffer_font_size_adjustment(cx, |_, cx| cx.notify()),
 1348                cx.observe_window_activation(|editor, cx| {
 1349                    let active = cx.is_window_active();
 1350                    editor.blink_manager.update(cx, |blink_manager, cx| {
 1351                        if active {
 1352                            blink_manager.enable(cx);
 1353                        } else {
 1354                            blink_manager.disable(cx);
 1355                        }
 1356                    });
 1357                }),
 1358            ],
 1359            tasks_update_task: None,
 1360            linked_edit_ranges: Default::default(),
 1361            previous_search_ranges: None,
 1362            breadcrumb_header: None,
 1363            focused_block: None,
 1364            next_scroll_position: NextScrollCursorCenterTopBottom::default(),
 1365            addons: HashMap::default(),
 1366            registered_buffers: HashMap::default(),
 1367            _scroll_cursor_center_top_bottom_task: Task::ready(()),
 1368            toggle_fold_multiple_buffers: Task::ready(()),
 1369            text_style_refinement: None,
 1370        };
 1371        this.tasks_update_task = Some(this.refresh_runnables(cx));
 1372        this._subscriptions.extend(project_subscriptions);
 1373
 1374        this.end_selection(cx);
 1375        this.scroll_manager.show_scrollbar(cx);
 1376
 1377        if mode == EditorMode::Full {
 1378            let should_auto_hide_scrollbars = cx.should_auto_hide_scrollbars();
 1379            cx.set_global(ScrollbarAutoHide(should_auto_hide_scrollbars));
 1380
 1381            if this.git_blame_inline_enabled {
 1382                this.git_blame_inline_enabled = true;
 1383                this.start_git_blame_inline(false, cx);
 1384            }
 1385
 1386            if let Some(buffer) = buffer.read(cx).as_singleton() {
 1387                if let Some(project) = this.project.as_ref() {
 1388                    let lsp_store = project.read(cx).lsp_store();
 1389                    let handle = lsp_store.update(cx, |lsp_store, cx| {
 1390                        lsp_store.register_buffer_with_language_servers(&buffer, cx)
 1391                    });
 1392                    this.registered_buffers
 1393                        .insert(buffer.read(cx).remote_id(), handle);
 1394                }
 1395            }
 1396        }
 1397
 1398        this.report_editor_event("Editor Opened", None, cx);
 1399        this
 1400    }
 1401
 1402    pub fn mouse_menu_is_focused(&self, cx: &WindowContext) -> bool {
 1403        self.mouse_context_menu
 1404            .as_ref()
 1405            .is_some_and(|menu| menu.context_menu.focus_handle(cx).is_focused(cx))
 1406    }
 1407
 1408    fn key_context(&self, cx: &ViewContext<Self>) -> KeyContext {
 1409        let mut key_context = KeyContext::new_with_defaults();
 1410        key_context.add("Editor");
 1411        let mode = match self.mode {
 1412            EditorMode::SingleLine { .. } => "single_line",
 1413            EditorMode::AutoHeight { .. } => "auto_height",
 1414            EditorMode::Full => "full",
 1415        };
 1416
 1417        if EditorSettings::jupyter_enabled(cx) {
 1418            key_context.add("jupyter");
 1419        }
 1420
 1421        key_context.set("mode", mode);
 1422        if self.pending_rename.is_some() {
 1423            key_context.add("renaming");
 1424        }
 1425        match self.context_menu.borrow().as_ref() {
 1426            Some(CodeContextMenu::Completions(_)) => {
 1427                key_context.add("menu");
 1428                key_context.add("showing_completions")
 1429            }
 1430            Some(CodeContextMenu::CodeActions(_)) => {
 1431                key_context.add("menu");
 1432                key_context.add("showing_code_actions")
 1433            }
 1434            None => {}
 1435        }
 1436
 1437        // Disable vim contexts when a sub-editor (e.g. rename/inline assistant) is focused.
 1438        if !self.focus_handle(cx).contains_focused(cx)
 1439            || (self.is_focused(cx) || self.mouse_menu_is_focused(cx))
 1440        {
 1441            for addon in self.addons.values() {
 1442                addon.extend_key_context(&mut key_context, cx)
 1443            }
 1444        }
 1445
 1446        if let Some(extension) = self
 1447            .buffer
 1448            .read(cx)
 1449            .as_singleton()
 1450            .and_then(|buffer| buffer.read(cx).file()?.path().extension()?.to_str())
 1451        {
 1452            key_context.set("extension", extension.to_string());
 1453        }
 1454
 1455        if self.has_active_inline_completion() {
 1456            key_context.add("copilot_suggestion");
 1457            key_context.add("inline_completion");
 1458        }
 1459
 1460        if !self
 1461            .selections
 1462            .disjoint
 1463            .iter()
 1464            .all(|selection| selection.start == selection.end)
 1465        {
 1466            key_context.add("selection");
 1467        }
 1468
 1469        key_context
 1470    }
 1471
 1472    pub fn new_file(
 1473        workspace: &mut Workspace,
 1474        _: &workspace::NewFile,
 1475        cx: &mut ViewContext<Workspace>,
 1476    ) {
 1477        Self::new_in_workspace(workspace, cx).detach_and_prompt_err(
 1478            "Failed to create buffer",
 1479            cx,
 1480            |e, _| match e.error_code() {
 1481                ErrorCode::RemoteUpgradeRequired => Some(format!(
 1482                "The remote instance of Zed does not support this yet. It must be upgraded to {}",
 1483                e.error_tag("required").unwrap_or("the latest version")
 1484            )),
 1485                _ => None,
 1486            },
 1487        );
 1488    }
 1489
 1490    pub fn new_in_workspace(
 1491        workspace: &mut Workspace,
 1492        cx: &mut ViewContext<Workspace>,
 1493    ) -> Task<Result<View<Editor>>> {
 1494        let project = workspace.project().clone();
 1495        let create = project.update(cx, |project, cx| project.create_buffer(cx));
 1496
 1497        cx.spawn(|workspace, mut cx| async move {
 1498            let buffer = create.await?;
 1499            workspace.update(&mut cx, |workspace, cx| {
 1500                let editor =
 1501                    cx.new_view(|cx| Editor::for_buffer(buffer, Some(project.clone()), cx));
 1502                workspace.add_item_to_active_pane(Box::new(editor.clone()), None, true, cx);
 1503                editor
 1504            })
 1505        })
 1506    }
 1507
 1508    fn new_file_vertical(
 1509        workspace: &mut Workspace,
 1510        _: &workspace::NewFileSplitVertical,
 1511        cx: &mut ViewContext<Workspace>,
 1512    ) {
 1513        Self::new_file_in_direction(workspace, SplitDirection::vertical(cx), cx)
 1514    }
 1515
 1516    fn new_file_horizontal(
 1517        workspace: &mut Workspace,
 1518        _: &workspace::NewFileSplitHorizontal,
 1519        cx: &mut ViewContext<Workspace>,
 1520    ) {
 1521        Self::new_file_in_direction(workspace, SplitDirection::horizontal(cx), cx)
 1522    }
 1523
 1524    fn new_file_in_direction(
 1525        workspace: &mut Workspace,
 1526        direction: SplitDirection,
 1527        cx: &mut ViewContext<Workspace>,
 1528    ) {
 1529        let project = workspace.project().clone();
 1530        let create = project.update(cx, |project, cx| project.create_buffer(cx));
 1531
 1532        cx.spawn(|workspace, mut cx| async move {
 1533            let buffer = create.await?;
 1534            workspace.update(&mut cx, move |workspace, cx| {
 1535                workspace.split_item(
 1536                    direction,
 1537                    Box::new(
 1538                        cx.new_view(|cx| Editor::for_buffer(buffer, Some(project.clone()), cx)),
 1539                    ),
 1540                    cx,
 1541                )
 1542            })?;
 1543            anyhow::Ok(())
 1544        })
 1545        .detach_and_prompt_err("Failed to create buffer", cx, |e, _| match e.error_code() {
 1546            ErrorCode::RemoteUpgradeRequired => Some(format!(
 1547                "The remote instance of Zed does not support this yet. It must be upgraded to {}",
 1548                e.error_tag("required").unwrap_or("the latest version")
 1549            )),
 1550            _ => None,
 1551        });
 1552    }
 1553
 1554    pub fn leader_peer_id(&self) -> Option<PeerId> {
 1555        self.leader_peer_id
 1556    }
 1557
 1558    pub fn buffer(&self) -> &Model<MultiBuffer> {
 1559        &self.buffer
 1560    }
 1561
 1562    pub fn workspace(&self) -> Option<View<Workspace>> {
 1563        self.workspace.as_ref()?.0.upgrade()
 1564    }
 1565
 1566    pub fn title<'a>(&self, cx: &'a AppContext) -> Cow<'a, str> {
 1567        self.buffer().read(cx).title(cx)
 1568    }
 1569
 1570    pub fn snapshot(&mut self, cx: &mut WindowContext) -> EditorSnapshot {
 1571        let git_blame_gutter_max_author_length = self
 1572            .render_git_blame_gutter(cx)
 1573            .then(|| {
 1574                if let Some(blame) = self.blame.as_ref() {
 1575                    let max_author_length =
 1576                        blame.update(cx, |blame, cx| blame.max_author_length(cx));
 1577                    Some(max_author_length)
 1578                } else {
 1579                    None
 1580                }
 1581            })
 1582            .flatten();
 1583
 1584        EditorSnapshot {
 1585            mode: self.mode,
 1586            show_gutter: self.show_gutter,
 1587            show_line_numbers: self.show_line_numbers,
 1588            show_git_diff_gutter: self.show_git_diff_gutter,
 1589            show_code_actions: self.show_code_actions,
 1590            show_runnables: self.show_runnables,
 1591            git_blame_gutter_max_author_length,
 1592            display_snapshot: self.display_map.update(cx, |map, cx| map.snapshot(cx)),
 1593            scroll_anchor: self.scroll_manager.anchor(),
 1594            ongoing_scroll: self.scroll_manager.ongoing_scroll(),
 1595            placeholder_text: self.placeholder_text.clone(),
 1596            diff_map: self.diff_map.snapshot(),
 1597            is_focused: self.focus_handle.is_focused(cx),
 1598            current_line_highlight: self
 1599                .current_line_highlight
 1600                .unwrap_or_else(|| EditorSettings::get_global(cx).current_line_highlight),
 1601            gutter_hovered: self.gutter_hovered,
 1602        }
 1603    }
 1604
 1605    pub fn language_at<T: ToOffset>(&self, point: T, cx: &AppContext) -> Option<Arc<Language>> {
 1606        self.buffer.read(cx).language_at(point, cx)
 1607    }
 1608
 1609    pub fn file_at<T: ToOffset>(
 1610        &self,
 1611        point: T,
 1612        cx: &AppContext,
 1613    ) -> Option<Arc<dyn language::File>> {
 1614        self.buffer.read(cx).read(cx).file_at(point).cloned()
 1615    }
 1616
 1617    pub fn active_excerpt(
 1618        &self,
 1619        cx: &AppContext,
 1620    ) -> Option<(ExcerptId, Model<Buffer>, Range<text::Anchor>)> {
 1621        self.buffer
 1622            .read(cx)
 1623            .excerpt_containing(self.selections.newest_anchor().head(), cx)
 1624    }
 1625
 1626    pub fn mode(&self) -> EditorMode {
 1627        self.mode
 1628    }
 1629
 1630    pub fn collaboration_hub(&self) -> Option<&dyn CollaborationHub> {
 1631        self.collaboration_hub.as_deref()
 1632    }
 1633
 1634    pub fn set_collaboration_hub(&mut self, hub: Box<dyn CollaborationHub>) {
 1635        self.collaboration_hub = Some(hub);
 1636    }
 1637
 1638    pub fn set_custom_context_menu(
 1639        &mut self,
 1640        f: impl 'static
 1641            + Fn(&mut Self, DisplayPoint, &mut ViewContext<Self>) -> Option<View<ui::ContextMenu>>,
 1642    ) {
 1643        self.custom_context_menu = Some(Box::new(f))
 1644    }
 1645
 1646    pub fn set_completion_provider(&mut self, provider: Option<Box<dyn CompletionProvider>>) {
 1647        self.completion_provider = provider;
 1648    }
 1649
 1650    pub fn semantics_provider(&self) -> Option<Rc<dyn SemanticsProvider>> {
 1651        self.semantics_provider.clone()
 1652    }
 1653
 1654    pub fn set_semantics_provider(&mut self, provider: Option<Rc<dyn SemanticsProvider>>) {
 1655        self.semantics_provider = provider;
 1656    }
 1657
 1658    pub fn set_inline_completion_provider<T>(
 1659        &mut self,
 1660        provider: Option<Model<T>>,
 1661        cx: &mut ViewContext<Self>,
 1662    ) where
 1663        T: InlineCompletionProvider,
 1664    {
 1665        self.inline_completion_provider =
 1666            provider.map(|provider| RegisteredInlineCompletionProvider {
 1667                _subscription: cx.observe(&provider, |this, _, cx| {
 1668                    if this.focus_handle.is_focused(cx) {
 1669                        this.update_visible_inline_completion(cx);
 1670                    }
 1671                }),
 1672                provider: Arc::new(provider),
 1673            });
 1674        self.refresh_inline_completion(false, false, cx);
 1675    }
 1676
 1677    pub fn placeholder_text(&self, _cx: &WindowContext) -> Option<&str> {
 1678        self.placeholder_text.as_deref()
 1679    }
 1680
 1681    pub fn set_placeholder_text(
 1682        &mut self,
 1683        placeholder_text: impl Into<Arc<str>>,
 1684        cx: &mut ViewContext<Self>,
 1685    ) {
 1686        let placeholder_text = Some(placeholder_text.into());
 1687        if self.placeholder_text != placeholder_text {
 1688            self.placeholder_text = placeholder_text;
 1689            cx.notify();
 1690        }
 1691    }
 1692
 1693    pub fn set_cursor_shape(&mut self, cursor_shape: CursorShape, cx: &mut ViewContext<Self>) {
 1694        self.cursor_shape = cursor_shape;
 1695
 1696        // Disrupt blink for immediate user feedback that the cursor shape has changed
 1697        self.blink_manager.update(cx, BlinkManager::show_cursor);
 1698
 1699        cx.notify();
 1700    }
 1701
 1702    pub fn set_current_line_highlight(
 1703        &mut self,
 1704        current_line_highlight: Option<CurrentLineHighlight>,
 1705    ) {
 1706        self.current_line_highlight = current_line_highlight;
 1707    }
 1708
 1709    pub fn set_collapse_matches(&mut self, collapse_matches: bool) {
 1710        self.collapse_matches = collapse_matches;
 1711    }
 1712
 1713    pub fn register_buffers_with_language_servers(&mut self, cx: &mut ViewContext<Self>) {
 1714        let buffers = self.buffer.read(cx).all_buffers();
 1715        let Some(lsp_store) = self.lsp_store(cx) else {
 1716            return;
 1717        };
 1718        lsp_store.update(cx, |lsp_store, cx| {
 1719            for buffer in buffers {
 1720                self.registered_buffers
 1721                    .entry(buffer.read(cx).remote_id())
 1722                    .or_insert_with(|| {
 1723                        lsp_store.register_buffer_with_language_servers(&buffer, cx)
 1724                    });
 1725            }
 1726        })
 1727    }
 1728
 1729    pub fn range_for_match<T: std::marker::Copy>(&self, range: &Range<T>) -> Range<T> {
 1730        if self.collapse_matches {
 1731            return range.start..range.start;
 1732        }
 1733        range.clone()
 1734    }
 1735
 1736    pub fn set_clip_at_line_ends(&mut self, clip: bool, cx: &mut ViewContext<Self>) {
 1737        if self.display_map.read(cx).clip_at_line_ends != clip {
 1738            self.display_map
 1739                .update(cx, |map, _| map.clip_at_line_ends = clip);
 1740        }
 1741    }
 1742
 1743    pub fn set_input_enabled(&mut self, input_enabled: bool) {
 1744        self.input_enabled = input_enabled;
 1745    }
 1746
 1747    pub fn set_inline_completions_enabled(&mut self, enabled: bool, cx: &mut ViewContext<Self>) {
 1748        self.enable_inline_completions = enabled;
 1749        if !self.enable_inline_completions {
 1750            self.take_active_inline_completion(cx);
 1751            cx.notify();
 1752        }
 1753    }
 1754
 1755    pub fn set_autoindent(&mut self, autoindent: bool) {
 1756        if autoindent {
 1757            self.autoindent_mode = Some(AutoindentMode::EachLine);
 1758        } else {
 1759            self.autoindent_mode = None;
 1760        }
 1761    }
 1762
 1763    pub fn read_only(&self, cx: &AppContext) -> bool {
 1764        self.read_only || self.buffer.read(cx).read_only()
 1765    }
 1766
 1767    pub fn set_read_only(&mut self, read_only: bool) {
 1768        self.read_only = read_only;
 1769    }
 1770
 1771    pub fn set_use_autoclose(&mut self, autoclose: bool) {
 1772        self.use_autoclose = autoclose;
 1773    }
 1774
 1775    pub fn set_use_auto_surround(&mut self, auto_surround: bool) {
 1776        self.use_auto_surround = auto_surround;
 1777    }
 1778
 1779    pub fn set_auto_replace_emoji_shortcode(&mut self, auto_replace: bool) {
 1780        self.auto_replace_emoji_shortcode = auto_replace;
 1781    }
 1782
 1783    pub fn toggle_inline_completions(
 1784        &mut self,
 1785        _: &ToggleInlineCompletions,
 1786        cx: &mut ViewContext<Self>,
 1787    ) {
 1788        if self.show_inline_completions_override.is_some() {
 1789            self.set_show_inline_completions(None, cx);
 1790        } else {
 1791            let cursor = self.selections.newest_anchor().head();
 1792            if let Some((buffer, cursor_buffer_position)) =
 1793                self.buffer.read(cx).text_anchor_for_position(cursor, cx)
 1794            {
 1795                let show_inline_completions =
 1796                    !self.should_show_inline_completions(&buffer, cursor_buffer_position, cx);
 1797                self.set_show_inline_completions(Some(show_inline_completions), cx);
 1798            }
 1799        }
 1800    }
 1801
 1802    pub fn set_show_inline_completions(
 1803        &mut self,
 1804        show_inline_completions: Option<bool>,
 1805        cx: &mut ViewContext<Self>,
 1806    ) {
 1807        self.show_inline_completions_override = show_inline_completions;
 1808        self.refresh_inline_completion(false, true, cx);
 1809    }
 1810
 1811    pub fn inline_completions_enabled(&self, cx: &AppContext) -> bool {
 1812        let cursor = self.selections.newest_anchor().head();
 1813        if let Some((buffer, buffer_position)) =
 1814            self.buffer.read(cx).text_anchor_for_position(cursor, cx)
 1815        {
 1816            self.should_show_inline_completions(&buffer, buffer_position, cx)
 1817        } else {
 1818            false
 1819        }
 1820    }
 1821
 1822    fn should_show_inline_completions(
 1823        &self,
 1824        buffer: &Model<Buffer>,
 1825        buffer_position: language::Anchor,
 1826        cx: &AppContext,
 1827    ) -> bool {
 1828        if !self.snippet_stack.is_empty() {
 1829            return false;
 1830        }
 1831
 1832        if self.inline_completions_disabled_in_scope(buffer, buffer_position, cx) {
 1833            return false;
 1834        }
 1835
 1836        if let Some(provider) = self.inline_completion_provider() {
 1837            if let Some(show_inline_completions) = self.show_inline_completions_override {
 1838                show_inline_completions
 1839            } else {
 1840                self.mode == EditorMode::Full && provider.is_enabled(buffer, buffer_position, cx)
 1841            }
 1842        } else {
 1843            false
 1844        }
 1845    }
 1846
 1847    fn inline_completions_disabled_in_scope(
 1848        &self,
 1849        buffer: &Model<Buffer>,
 1850        buffer_position: language::Anchor,
 1851        cx: &AppContext,
 1852    ) -> bool {
 1853        let snapshot = buffer.read(cx).snapshot();
 1854        let settings = snapshot.settings_at(buffer_position, cx);
 1855
 1856        let Some(scope) = snapshot.language_scope_at(buffer_position) else {
 1857            return false;
 1858        };
 1859
 1860        scope.override_name().map_or(false, |scope_name| {
 1861            settings
 1862                .inline_completions_disabled_in
 1863                .iter()
 1864                .any(|s| s == scope_name)
 1865        })
 1866    }
 1867
 1868    pub fn set_use_modal_editing(&mut self, to: bool) {
 1869        self.use_modal_editing = to;
 1870    }
 1871
 1872    pub fn use_modal_editing(&self) -> bool {
 1873        self.use_modal_editing
 1874    }
 1875
 1876    fn selections_did_change(
 1877        &mut self,
 1878        local: bool,
 1879        old_cursor_position: &Anchor,
 1880        show_completions: bool,
 1881        cx: &mut ViewContext<Self>,
 1882    ) {
 1883        cx.invalidate_character_coordinates();
 1884
 1885        // Copy selections to primary selection buffer
 1886        #[cfg(any(target_os = "linux", target_os = "freebsd"))]
 1887        if local {
 1888            let selections = self.selections.all::<usize>(cx);
 1889            let buffer_handle = self.buffer.read(cx).read(cx);
 1890
 1891            let mut text = String::new();
 1892            for (index, selection) in selections.iter().enumerate() {
 1893                let text_for_selection = buffer_handle
 1894                    .text_for_range(selection.start..selection.end)
 1895                    .collect::<String>();
 1896
 1897                text.push_str(&text_for_selection);
 1898                if index != selections.len() - 1 {
 1899                    text.push('\n');
 1900                }
 1901            }
 1902
 1903            if !text.is_empty() {
 1904                cx.write_to_primary(ClipboardItem::new_string(text));
 1905            }
 1906        }
 1907
 1908        if self.focus_handle.is_focused(cx) && self.leader_peer_id.is_none() {
 1909            self.buffer.update(cx, |buffer, cx| {
 1910                buffer.set_active_selections(
 1911                    &self.selections.disjoint_anchors(),
 1912                    self.selections.line_mode,
 1913                    self.cursor_shape,
 1914                    cx,
 1915                )
 1916            });
 1917        }
 1918        let display_map = self
 1919            .display_map
 1920            .update(cx, |display_map, cx| display_map.snapshot(cx));
 1921        let buffer = &display_map.buffer_snapshot;
 1922        self.add_selections_state = None;
 1923        self.select_next_state = None;
 1924        self.select_prev_state = None;
 1925        self.select_larger_syntax_node_stack.clear();
 1926        self.invalidate_autoclose_regions(&self.selections.disjoint_anchors(), buffer);
 1927        self.snippet_stack
 1928            .invalidate(&self.selections.disjoint_anchors(), buffer);
 1929        self.take_rename(false, cx);
 1930
 1931        let new_cursor_position = self.selections.newest_anchor().head();
 1932
 1933        self.push_to_nav_history(
 1934            *old_cursor_position,
 1935            Some(new_cursor_position.to_point(buffer)),
 1936            cx,
 1937        );
 1938
 1939        if local {
 1940            let new_cursor_position = self.selections.newest_anchor().head();
 1941            let mut context_menu = self.context_menu.borrow_mut();
 1942            let completion_menu = match context_menu.as_ref() {
 1943                Some(CodeContextMenu::Completions(menu)) => Some(menu),
 1944                _ => {
 1945                    *context_menu = None;
 1946                    None
 1947                }
 1948            };
 1949
 1950            if let Some(completion_menu) = completion_menu {
 1951                let cursor_position = new_cursor_position.to_offset(buffer);
 1952                let (word_range, kind) =
 1953                    buffer.surrounding_word(completion_menu.initial_position, true);
 1954                if kind == Some(CharKind::Word)
 1955                    && word_range.to_inclusive().contains(&cursor_position)
 1956                {
 1957                    let mut completion_menu = completion_menu.clone();
 1958                    drop(context_menu);
 1959
 1960                    let query = Self::completion_query(buffer, cursor_position);
 1961                    cx.spawn(move |this, mut cx| async move {
 1962                        completion_menu
 1963                            .filter(query.as_deref(), cx.background_executor().clone())
 1964                            .await;
 1965
 1966                        this.update(&mut cx, |this, cx| {
 1967                            let mut context_menu = this.context_menu.borrow_mut();
 1968                            let Some(CodeContextMenu::Completions(menu)) = context_menu.as_ref()
 1969                            else {
 1970                                return;
 1971                            };
 1972
 1973                            if menu.id > completion_menu.id {
 1974                                return;
 1975                            }
 1976
 1977                            *context_menu = Some(CodeContextMenu::Completions(completion_menu));
 1978                            drop(context_menu);
 1979                            cx.notify();
 1980                        })
 1981                    })
 1982                    .detach();
 1983
 1984                    if show_completions {
 1985                        self.show_completions(&ShowCompletions { trigger: None }, cx);
 1986                    }
 1987                } else {
 1988                    drop(context_menu);
 1989                    self.hide_context_menu(cx);
 1990                }
 1991            } else {
 1992                drop(context_menu);
 1993            }
 1994
 1995            hide_hover(self, cx);
 1996
 1997            if old_cursor_position.to_display_point(&display_map).row()
 1998                != new_cursor_position.to_display_point(&display_map).row()
 1999            {
 2000                self.available_code_actions.take();
 2001            }
 2002            self.refresh_code_actions(cx);
 2003            self.refresh_document_highlights(cx);
 2004            refresh_matching_bracket_highlights(self, cx);
 2005            self.update_visible_inline_completion(cx);
 2006            linked_editing_ranges::refresh_linked_ranges(self, cx);
 2007            if self.git_blame_inline_enabled {
 2008                self.start_inline_blame_timer(cx);
 2009            }
 2010        }
 2011
 2012        self.blink_manager.update(cx, BlinkManager::pause_blinking);
 2013        cx.emit(EditorEvent::SelectionsChanged { local });
 2014
 2015        if self.selections.disjoint_anchors().len() == 1 {
 2016            cx.emit(SearchEvent::ActiveMatchChanged)
 2017        }
 2018        cx.notify();
 2019    }
 2020
 2021    pub fn change_selections<R>(
 2022        &mut self,
 2023        autoscroll: Option<Autoscroll>,
 2024        cx: &mut ViewContext<Self>,
 2025        change: impl FnOnce(&mut MutableSelectionsCollection<'_>) -> R,
 2026    ) -> R {
 2027        self.change_selections_inner(autoscroll, true, cx, change)
 2028    }
 2029
 2030    pub fn change_selections_inner<R>(
 2031        &mut self,
 2032        autoscroll: Option<Autoscroll>,
 2033        request_completions: bool,
 2034        cx: &mut ViewContext<Self>,
 2035        change: impl FnOnce(&mut MutableSelectionsCollection<'_>) -> R,
 2036    ) -> R {
 2037        let old_cursor_position = self.selections.newest_anchor().head();
 2038        self.push_to_selection_history();
 2039
 2040        let (changed, result) = self.selections.change_with(cx, change);
 2041
 2042        if changed {
 2043            if let Some(autoscroll) = autoscroll {
 2044                self.request_autoscroll(autoscroll, cx);
 2045            }
 2046            self.selections_did_change(true, &old_cursor_position, request_completions, cx);
 2047
 2048            if self.should_open_signature_help_automatically(
 2049                &old_cursor_position,
 2050                self.signature_help_state.backspace_pressed(),
 2051                cx,
 2052            ) {
 2053                self.show_signature_help(&ShowSignatureHelp, cx);
 2054            }
 2055            self.signature_help_state.set_backspace_pressed(false);
 2056        }
 2057
 2058        result
 2059    }
 2060
 2061    pub fn edit<I, S, T>(&mut self, edits: I, cx: &mut ViewContext<Self>)
 2062    where
 2063        I: IntoIterator<Item = (Range<S>, T)>,
 2064        S: ToOffset,
 2065        T: Into<Arc<str>>,
 2066    {
 2067        if self.read_only(cx) {
 2068            return;
 2069        }
 2070
 2071        self.buffer
 2072            .update(cx, |buffer, cx| buffer.edit(edits, None, cx));
 2073    }
 2074
 2075    pub fn edit_with_autoindent<I, S, T>(&mut self, edits: I, cx: &mut ViewContext<Self>)
 2076    where
 2077        I: IntoIterator<Item = (Range<S>, T)>,
 2078        S: ToOffset,
 2079        T: Into<Arc<str>>,
 2080    {
 2081        if self.read_only(cx) {
 2082            return;
 2083        }
 2084
 2085        self.buffer.update(cx, |buffer, cx| {
 2086            buffer.edit(edits, self.autoindent_mode.clone(), cx)
 2087        });
 2088    }
 2089
 2090    pub fn edit_with_block_indent<I, S, T>(
 2091        &mut self,
 2092        edits: I,
 2093        original_indent_columns: Vec<u32>,
 2094        cx: &mut ViewContext<Self>,
 2095    ) where
 2096        I: IntoIterator<Item = (Range<S>, T)>,
 2097        S: ToOffset,
 2098        T: Into<Arc<str>>,
 2099    {
 2100        if self.read_only(cx) {
 2101            return;
 2102        }
 2103
 2104        self.buffer.update(cx, |buffer, cx| {
 2105            buffer.edit(
 2106                edits,
 2107                Some(AutoindentMode::Block {
 2108                    original_indent_columns,
 2109                }),
 2110                cx,
 2111            )
 2112        });
 2113    }
 2114
 2115    fn select(&mut self, phase: SelectPhase, cx: &mut ViewContext<Self>) {
 2116        self.hide_context_menu(cx);
 2117
 2118        match phase {
 2119            SelectPhase::Begin {
 2120                position,
 2121                add,
 2122                click_count,
 2123            } => self.begin_selection(position, add, click_count, cx),
 2124            SelectPhase::BeginColumnar {
 2125                position,
 2126                goal_column,
 2127                reset,
 2128            } => self.begin_columnar_selection(position, goal_column, reset, cx),
 2129            SelectPhase::Extend {
 2130                position,
 2131                click_count,
 2132            } => self.extend_selection(position, click_count, cx),
 2133            SelectPhase::Update {
 2134                position,
 2135                goal_column,
 2136                scroll_delta,
 2137            } => self.update_selection(position, goal_column, scroll_delta, cx),
 2138            SelectPhase::End => self.end_selection(cx),
 2139        }
 2140    }
 2141
 2142    fn extend_selection(
 2143        &mut self,
 2144        position: DisplayPoint,
 2145        click_count: usize,
 2146        cx: &mut ViewContext<Self>,
 2147    ) {
 2148        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 2149        let tail = self.selections.newest::<usize>(cx).tail();
 2150        self.begin_selection(position, false, click_count, cx);
 2151
 2152        let position = position.to_offset(&display_map, Bias::Left);
 2153        let tail_anchor = display_map.buffer_snapshot.anchor_before(tail);
 2154
 2155        let mut pending_selection = self
 2156            .selections
 2157            .pending_anchor()
 2158            .expect("extend_selection not called with pending selection");
 2159        if position >= tail {
 2160            pending_selection.start = tail_anchor;
 2161        } else {
 2162            pending_selection.end = tail_anchor;
 2163            pending_selection.reversed = true;
 2164        }
 2165
 2166        let mut pending_mode = self.selections.pending_mode().unwrap();
 2167        match &mut pending_mode {
 2168            SelectMode::Word(range) | SelectMode::Line(range) => *range = tail_anchor..tail_anchor,
 2169            _ => {}
 2170        }
 2171
 2172        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 2173            s.set_pending(pending_selection, pending_mode)
 2174        });
 2175    }
 2176
 2177    fn begin_selection(
 2178        &mut self,
 2179        position: DisplayPoint,
 2180        add: bool,
 2181        click_count: usize,
 2182        cx: &mut ViewContext<Self>,
 2183    ) {
 2184        if !self.focus_handle.is_focused(cx) {
 2185            self.last_focused_descendant = None;
 2186            cx.focus(&self.focus_handle);
 2187        }
 2188
 2189        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 2190        let buffer = &display_map.buffer_snapshot;
 2191        let newest_selection = self.selections.newest_anchor().clone();
 2192        let position = display_map.clip_point(position, Bias::Left);
 2193
 2194        let start;
 2195        let end;
 2196        let mode;
 2197        let mut auto_scroll;
 2198        match click_count {
 2199            1 => {
 2200                start = buffer.anchor_before(position.to_point(&display_map));
 2201                end = start;
 2202                mode = SelectMode::Character;
 2203                auto_scroll = true;
 2204            }
 2205            2 => {
 2206                let range = movement::surrounding_word(&display_map, position);
 2207                start = buffer.anchor_before(range.start.to_point(&display_map));
 2208                end = buffer.anchor_before(range.end.to_point(&display_map));
 2209                mode = SelectMode::Word(start..end);
 2210                auto_scroll = true;
 2211            }
 2212            3 => {
 2213                let position = display_map
 2214                    .clip_point(position, Bias::Left)
 2215                    .to_point(&display_map);
 2216                let line_start = display_map.prev_line_boundary(position).0;
 2217                let next_line_start = buffer.clip_point(
 2218                    display_map.next_line_boundary(position).0 + Point::new(1, 0),
 2219                    Bias::Left,
 2220                );
 2221                start = buffer.anchor_before(line_start);
 2222                end = buffer.anchor_before(next_line_start);
 2223                mode = SelectMode::Line(start..end);
 2224                auto_scroll = true;
 2225            }
 2226            _ => {
 2227                start = buffer.anchor_before(0);
 2228                end = buffer.anchor_before(buffer.len());
 2229                mode = SelectMode::All;
 2230                auto_scroll = false;
 2231            }
 2232        }
 2233        auto_scroll &= EditorSettings::get_global(cx).autoscroll_on_clicks;
 2234
 2235        let point_to_delete: Option<usize> = {
 2236            let selected_points: Vec<Selection<Point>> =
 2237                self.selections.disjoint_in_range(start..end, cx);
 2238
 2239            if !add || click_count > 1 {
 2240                None
 2241            } else if !selected_points.is_empty() {
 2242                Some(selected_points[0].id)
 2243            } else {
 2244                let clicked_point_already_selected =
 2245                    self.selections.disjoint.iter().find(|selection| {
 2246                        selection.start.to_point(buffer) == start.to_point(buffer)
 2247                            || selection.end.to_point(buffer) == end.to_point(buffer)
 2248                    });
 2249
 2250                clicked_point_already_selected.map(|selection| selection.id)
 2251            }
 2252        };
 2253
 2254        let selections_count = self.selections.count();
 2255
 2256        self.change_selections(auto_scroll.then(Autoscroll::newest), cx, |s| {
 2257            if let Some(point_to_delete) = point_to_delete {
 2258                s.delete(point_to_delete);
 2259
 2260                if selections_count == 1 {
 2261                    s.set_pending_anchor_range(start..end, mode);
 2262                }
 2263            } else {
 2264                if !add {
 2265                    s.clear_disjoint();
 2266                } else if click_count > 1 {
 2267                    s.delete(newest_selection.id)
 2268                }
 2269
 2270                s.set_pending_anchor_range(start..end, mode);
 2271            }
 2272        });
 2273    }
 2274
 2275    fn begin_columnar_selection(
 2276        &mut self,
 2277        position: DisplayPoint,
 2278        goal_column: u32,
 2279        reset: bool,
 2280        cx: &mut ViewContext<Self>,
 2281    ) {
 2282        if !self.focus_handle.is_focused(cx) {
 2283            self.last_focused_descendant = None;
 2284            cx.focus(&self.focus_handle);
 2285        }
 2286
 2287        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 2288
 2289        if reset {
 2290            let pointer_position = display_map
 2291                .buffer_snapshot
 2292                .anchor_before(position.to_point(&display_map));
 2293
 2294            self.change_selections(Some(Autoscroll::newest()), cx, |s| {
 2295                s.clear_disjoint();
 2296                s.set_pending_anchor_range(
 2297                    pointer_position..pointer_position,
 2298                    SelectMode::Character,
 2299                );
 2300            });
 2301        }
 2302
 2303        let tail = self.selections.newest::<Point>(cx).tail();
 2304        self.columnar_selection_tail = Some(display_map.buffer_snapshot.anchor_before(tail));
 2305
 2306        if !reset {
 2307            self.select_columns(
 2308                tail.to_display_point(&display_map),
 2309                position,
 2310                goal_column,
 2311                &display_map,
 2312                cx,
 2313            );
 2314        }
 2315    }
 2316
 2317    fn update_selection(
 2318        &mut self,
 2319        position: DisplayPoint,
 2320        goal_column: u32,
 2321        scroll_delta: gpui::Point<f32>,
 2322        cx: &mut ViewContext<Self>,
 2323    ) {
 2324        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 2325
 2326        if let Some(tail) = self.columnar_selection_tail.as_ref() {
 2327            let tail = tail.to_display_point(&display_map);
 2328            self.select_columns(tail, position, goal_column, &display_map, cx);
 2329        } else if let Some(mut pending) = self.selections.pending_anchor() {
 2330            let buffer = self.buffer.read(cx).snapshot(cx);
 2331            let head;
 2332            let tail;
 2333            let mode = self.selections.pending_mode().unwrap();
 2334            match &mode {
 2335                SelectMode::Character => {
 2336                    head = position.to_point(&display_map);
 2337                    tail = pending.tail().to_point(&buffer);
 2338                }
 2339                SelectMode::Word(original_range) => {
 2340                    let original_display_range = original_range.start.to_display_point(&display_map)
 2341                        ..original_range.end.to_display_point(&display_map);
 2342                    let original_buffer_range = original_display_range.start.to_point(&display_map)
 2343                        ..original_display_range.end.to_point(&display_map);
 2344                    if movement::is_inside_word(&display_map, position)
 2345                        || original_display_range.contains(&position)
 2346                    {
 2347                        let word_range = movement::surrounding_word(&display_map, position);
 2348                        if word_range.start < original_display_range.start {
 2349                            head = word_range.start.to_point(&display_map);
 2350                        } else {
 2351                            head = word_range.end.to_point(&display_map);
 2352                        }
 2353                    } else {
 2354                        head = position.to_point(&display_map);
 2355                    }
 2356
 2357                    if head <= original_buffer_range.start {
 2358                        tail = original_buffer_range.end;
 2359                    } else {
 2360                        tail = original_buffer_range.start;
 2361                    }
 2362                }
 2363                SelectMode::Line(original_range) => {
 2364                    let original_range = original_range.to_point(&display_map.buffer_snapshot);
 2365
 2366                    let position = display_map
 2367                        .clip_point(position, Bias::Left)
 2368                        .to_point(&display_map);
 2369                    let line_start = display_map.prev_line_boundary(position).0;
 2370                    let next_line_start = buffer.clip_point(
 2371                        display_map.next_line_boundary(position).0 + Point::new(1, 0),
 2372                        Bias::Left,
 2373                    );
 2374
 2375                    if line_start < original_range.start {
 2376                        head = line_start
 2377                    } else {
 2378                        head = next_line_start
 2379                    }
 2380
 2381                    if head <= original_range.start {
 2382                        tail = original_range.end;
 2383                    } else {
 2384                        tail = original_range.start;
 2385                    }
 2386                }
 2387                SelectMode::All => {
 2388                    return;
 2389                }
 2390            };
 2391
 2392            if head < tail {
 2393                pending.start = buffer.anchor_before(head);
 2394                pending.end = buffer.anchor_before(tail);
 2395                pending.reversed = true;
 2396            } else {
 2397                pending.start = buffer.anchor_before(tail);
 2398                pending.end = buffer.anchor_before(head);
 2399                pending.reversed = false;
 2400            }
 2401
 2402            self.change_selections(None, cx, |s| {
 2403                s.set_pending(pending, mode);
 2404            });
 2405        } else {
 2406            log::error!("update_selection dispatched with no pending selection");
 2407            return;
 2408        }
 2409
 2410        self.apply_scroll_delta(scroll_delta, cx);
 2411        cx.notify();
 2412    }
 2413
 2414    fn end_selection(&mut self, cx: &mut ViewContext<Self>) {
 2415        self.columnar_selection_tail.take();
 2416        if self.selections.pending_anchor().is_some() {
 2417            let selections = self.selections.all::<usize>(cx);
 2418            self.change_selections(None, cx, |s| {
 2419                s.select(selections);
 2420                s.clear_pending();
 2421            });
 2422        }
 2423    }
 2424
 2425    fn select_columns(
 2426        &mut self,
 2427        tail: DisplayPoint,
 2428        head: DisplayPoint,
 2429        goal_column: u32,
 2430        display_map: &DisplaySnapshot,
 2431        cx: &mut ViewContext<Self>,
 2432    ) {
 2433        let start_row = cmp::min(tail.row(), head.row());
 2434        let end_row = cmp::max(tail.row(), head.row());
 2435        let start_column = cmp::min(tail.column(), goal_column);
 2436        let end_column = cmp::max(tail.column(), goal_column);
 2437        let reversed = start_column < tail.column();
 2438
 2439        let selection_ranges = (start_row.0..=end_row.0)
 2440            .map(DisplayRow)
 2441            .filter_map(|row| {
 2442                if start_column <= display_map.line_len(row) && !display_map.is_block_line(row) {
 2443                    let start = display_map
 2444                        .clip_point(DisplayPoint::new(row, start_column), Bias::Left)
 2445                        .to_point(display_map);
 2446                    let end = display_map
 2447                        .clip_point(DisplayPoint::new(row, end_column), Bias::Right)
 2448                        .to_point(display_map);
 2449                    if reversed {
 2450                        Some(end..start)
 2451                    } else {
 2452                        Some(start..end)
 2453                    }
 2454                } else {
 2455                    None
 2456                }
 2457            })
 2458            .collect::<Vec<_>>();
 2459
 2460        self.change_selections(None, cx, |s| {
 2461            s.select_ranges(selection_ranges);
 2462        });
 2463        cx.notify();
 2464    }
 2465
 2466    pub fn has_pending_nonempty_selection(&self) -> bool {
 2467        let pending_nonempty_selection = match self.selections.pending_anchor() {
 2468            Some(Selection { start, end, .. }) => start != end,
 2469            None => false,
 2470        };
 2471
 2472        pending_nonempty_selection
 2473            || (self.columnar_selection_tail.is_some() && self.selections.disjoint.len() > 1)
 2474    }
 2475
 2476    pub fn has_pending_selection(&self) -> bool {
 2477        self.selections.pending_anchor().is_some() || self.columnar_selection_tail.is_some()
 2478    }
 2479
 2480    pub fn cancel(&mut self, _: &Cancel, cx: &mut ViewContext<Self>) {
 2481        if self.clear_expanded_diff_hunks(cx) {
 2482            cx.notify();
 2483            return;
 2484        }
 2485        if self.dismiss_menus_and_popups(true, cx) {
 2486            return;
 2487        }
 2488
 2489        if self.mode == EditorMode::Full
 2490            && self.change_selections(Some(Autoscroll::fit()), cx, |s| s.try_cancel())
 2491        {
 2492            return;
 2493        }
 2494
 2495        cx.propagate();
 2496    }
 2497
 2498    pub fn dismiss_menus_and_popups(
 2499        &mut self,
 2500        should_report_inline_completion_event: bool,
 2501        cx: &mut ViewContext<Self>,
 2502    ) -> bool {
 2503        if self.take_rename(false, cx).is_some() {
 2504            return true;
 2505        }
 2506
 2507        if hide_hover(self, cx) {
 2508            return true;
 2509        }
 2510
 2511        if self.hide_signature_help(cx, SignatureHelpHiddenBy::Escape) {
 2512            return true;
 2513        }
 2514
 2515        if self.hide_context_menu(cx).is_some() {
 2516            if self.show_inline_completions_in_menu(cx) && self.has_active_inline_completion() {
 2517                self.update_visible_inline_completion(cx);
 2518            }
 2519            return true;
 2520        }
 2521
 2522        if self.mouse_context_menu.take().is_some() {
 2523            return true;
 2524        }
 2525
 2526        if self.discard_inline_completion(should_report_inline_completion_event, cx) {
 2527            return true;
 2528        }
 2529
 2530        if self.snippet_stack.pop().is_some() {
 2531            return true;
 2532        }
 2533
 2534        if self.mode == EditorMode::Full && self.active_diagnostics.is_some() {
 2535            self.dismiss_diagnostics(cx);
 2536            return true;
 2537        }
 2538
 2539        false
 2540    }
 2541
 2542    fn linked_editing_ranges_for(
 2543        &self,
 2544        selection: Range<text::Anchor>,
 2545        cx: &AppContext,
 2546    ) -> Option<HashMap<Model<Buffer>, Vec<Range<text::Anchor>>>> {
 2547        if self.linked_edit_ranges.is_empty() {
 2548            return None;
 2549        }
 2550        let ((base_range, linked_ranges), buffer_snapshot, buffer) =
 2551            selection.end.buffer_id.and_then(|end_buffer_id| {
 2552                if selection.start.buffer_id != Some(end_buffer_id) {
 2553                    return None;
 2554                }
 2555                let buffer = self.buffer.read(cx).buffer(end_buffer_id)?;
 2556                let snapshot = buffer.read(cx).snapshot();
 2557                self.linked_edit_ranges
 2558                    .get(end_buffer_id, selection.start..selection.end, &snapshot)
 2559                    .map(|ranges| (ranges, snapshot, buffer))
 2560            })?;
 2561        use text::ToOffset as TO;
 2562        // find offset from the start of current range to current cursor position
 2563        let start_byte_offset = TO::to_offset(&base_range.start, &buffer_snapshot);
 2564
 2565        let start_offset = TO::to_offset(&selection.start, &buffer_snapshot);
 2566        let start_difference = start_offset - start_byte_offset;
 2567        let end_offset = TO::to_offset(&selection.end, &buffer_snapshot);
 2568        let end_difference = end_offset - start_byte_offset;
 2569        // Current range has associated linked ranges.
 2570        let mut linked_edits = HashMap::<_, Vec<_>>::default();
 2571        for range in linked_ranges.iter() {
 2572            let start_offset = TO::to_offset(&range.start, &buffer_snapshot);
 2573            let end_offset = start_offset + end_difference;
 2574            let start_offset = start_offset + start_difference;
 2575            if start_offset > buffer_snapshot.len() || end_offset > buffer_snapshot.len() {
 2576                continue;
 2577            }
 2578            if self.selections.disjoint_anchor_ranges().any(|s| {
 2579                if s.start.buffer_id != selection.start.buffer_id
 2580                    || s.end.buffer_id != selection.end.buffer_id
 2581                {
 2582                    return false;
 2583                }
 2584                TO::to_offset(&s.start.text_anchor, &buffer_snapshot) <= end_offset
 2585                    && TO::to_offset(&s.end.text_anchor, &buffer_snapshot) >= start_offset
 2586            }) {
 2587                continue;
 2588            }
 2589            let start = buffer_snapshot.anchor_after(start_offset);
 2590            let end = buffer_snapshot.anchor_after(end_offset);
 2591            linked_edits
 2592                .entry(buffer.clone())
 2593                .or_default()
 2594                .push(start..end);
 2595        }
 2596        Some(linked_edits)
 2597    }
 2598
 2599    pub fn handle_input(&mut self, text: &str, cx: &mut ViewContext<Self>) {
 2600        let text: Arc<str> = text.into();
 2601
 2602        if self.read_only(cx) {
 2603            return;
 2604        }
 2605
 2606        let selections = self.selections.all_adjusted(cx);
 2607        let mut bracket_inserted = false;
 2608        let mut edits = Vec::new();
 2609        let mut linked_edits = HashMap::<_, Vec<_>>::default();
 2610        let mut new_selections = Vec::with_capacity(selections.len());
 2611        let mut new_autoclose_regions = Vec::new();
 2612        let snapshot = self.buffer.read(cx).read(cx);
 2613
 2614        for (selection, autoclose_region) in
 2615            self.selections_with_autoclose_regions(selections, &snapshot)
 2616        {
 2617            if let Some(scope) = snapshot.language_scope_at(selection.head()) {
 2618                // Determine if the inserted text matches the opening or closing
 2619                // bracket of any of this language's bracket pairs.
 2620                let mut bracket_pair = None;
 2621                let mut is_bracket_pair_start = false;
 2622                let mut is_bracket_pair_end = false;
 2623                if !text.is_empty() {
 2624                    // `text` can be empty when a user is using IME (e.g. Chinese Wubi Simplified)
 2625                    //  and they are removing the character that triggered IME popup.
 2626                    for (pair, enabled) in scope.brackets() {
 2627                        if !pair.close && !pair.surround {
 2628                            continue;
 2629                        }
 2630
 2631                        if enabled && pair.start.ends_with(text.as_ref()) {
 2632                            let prefix_len = pair.start.len() - text.len();
 2633                            let preceding_text_matches_prefix = prefix_len == 0
 2634                                || (selection.start.column >= (prefix_len as u32)
 2635                                    && snapshot.contains_str_at(
 2636                                        Point::new(
 2637                                            selection.start.row,
 2638                                            selection.start.column - (prefix_len as u32),
 2639                                        ),
 2640                                        &pair.start[..prefix_len],
 2641                                    ));
 2642                            if preceding_text_matches_prefix {
 2643                                bracket_pair = Some(pair.clone());
 2644                                is_bracket_pair_start = true;
 2645                                break;
 2646                            }
 2647                        }
 2648                        if pair.end.as_str() == text.as_ref() {
 2649                            bracket_pair = Some(pair.clone());
 2650                            is_bracket_pair_end = true;
 2651                            break;
 2652                        }
 2653                    }
 2654                }
 2655
 2656                if let Some(bracket_pair) = bracket_pair {
 2657                    let snapshot_settings = snapshot.settings_at(selection.start, cx);
 2658                    let autoclose = self.use_autoclose && snapshot_settings.use_autoclose;
 2659                    let auto_surround =
 2660                        self.use_auto_surround && snapshot_settings.use_auto_surround;
 2661                    if selection.is_empty() {
 2662                        if is_bracket_pair_start {
 2663                            // If the inserted text is a suffix of an opening bracket and the
 2664                            // selection is preceded by the rest of the opening bracket, then
 2665                            // insert the closing bracket.
 2666                            let following_text_allows_autoclose = snapshot
 2667                                .chars_at(selection.start)
 2668                                .next()
 2669                                .map_or(true, |c| scope.should_autoclose_before(c));
 2670
 2671                            let is_closing_quote = if bracket_pair.end == bracket_pair.start
 2672                                && bracket_pair.start.len() == 1
 2673                            {
 2674                                let target = bracket_pair.start.chars().next().unwrap();
 2675                                let current_line_count = snapshot
 2676                                    .reversed_chars_at(selection.start)
 2677                                    .take_while(|&c| c != '\n')
 2678                                    .filter(|&c| c == target)
 2679                                    .count();
 2680                                current_line_count % 2 == 1
 2681                            } else {
 2682                                false
 2683                            };
 2684
 2685                            if autoclose
 2686                                && bracket_pair.close
 2687                                && following_text_allows_autoclose
 2688                                && !is_closing_quote
 2689                            {
 2690                                let anchor = snapshot.anchor_before(selection.end);
 2691                                new_selections.push((selection.map(|_| anchor), text.len()));
 2692                                new_autoclose_regions.push((
 2693                                    anchor,
 2694                                    text.len(),
 2695                                    selection.id,
 2696                                    bracket_pair.clone(),
 2697                                ));
 2698                                edits.push((
 2699                                    selection.range(),
 2700                                    format!("{}{}", text, bracket_pair.end).into(),
 2701                                ));
 2702                                bracket_inserted = true;
 2703                                continue;
 2704                            }
 2705                        }
 2706
 2707                        if let Some(region) = autoclose_region {
 2708                            // If the selection is followed by an auto-inserted closing bracket,
 2709                            // then don't insert that closing bracket again; just move the selection
 2710                            // past the closing bracket.
 2711                            let should_skip = selection.end == region.range.end.to_point(&snapshot)
 2712                                && text.as_ref() == region.pair.end.as_str();
 2713                            if should_skip {
 2714                                let anchor = snapshot.anchor_after(selection.end);
 2715                                new_selections
 2716                                    .push((selection.map(|_| anchor), region.pair.end.len()));
 2717                                continue;
 2718                            }
 2719                        }
 2720
 2721                        let always_treat_brackets_as_autoclosed = snapshot
 2722                            .settings_at(selection.start, cx)
 2723                            .always_treat_brackets_as_autoclosed;
 2724                        if always_treat_brackets_as_autoclosed
 2725                            && is_bracket_pair_end
 2726                            && snapshot.contains_str_at(selection.end, text.as_ref())
 2727                        {
 2728                            // Otherwise, when `always_treat_brackets_as_autoclosed` is set to `true
 2729                            // and the inserted text is a closing bracket and the selection is followed
 2730                            // by the closing bracket then move the selection past the closing bracket.
 2731                            let anchor = snapshot.anchor_after(selection.end);
 2732                            new_selections.push((selection.map(|_| anchor), text.len()));
 2733                            continue;
 2734                        }
 2735                    }
 2736                    // If an opening bracket is 1 character long and is typed while
 2737                    // text is selected, then surround that text with the bracket pair.
 2738                    else if auto_surround
 2739                        && bracket_pair.surround
 2740                        && is_bracket_pair_start
 2741                        && bracket_pair.start.chars().count() == 1
 2742                    {
 2743                        edits.push((selection.start..selection.start, text.clone()));
 2744                        edits.push((
 2745                            selection.end..selection.end,
 2746                            bracket_pair.end.as_str().into(),
 2747                        ));
 2748                        bracket_inserted = true;
 2749                        new_selections.push((
 2750                            Selection {
 2751                                id: selection.id,
 2752                                start: snapshot.anchor_after(selection.start),
 2753                                end: snapshot.anchor_before(selection.end),
 2754                                reversed: selection.reversed,
 2755                                goal: selection.goal,
 2756                            },
 2757                            0,
 2758                        ));
 2759                        continue;
 2760                    }
 2761                }
 2762            }
 2763
 2764            if self.auto_replace_emoji_shortcode
 2765                && selection.is_empty()
 2766                && text.as_ref().ends_with(':')
 2767            {
 2768                if let Some(possible_emoji_short_code) =
 2769                    Self::find_possible_emoji_shortcode_at_position(&snapshot, selection.start)
 2770                {
 2771                    if !possible_emoji_short_code.is_empty() {
 2772                        if let Some(emoji) = emojis::get_by_shortcode(&possible_emoji_short_code) {
 2773                            let emoji_shortcode_start = Point::new(
 2774                                selection.start.row,
 2775                                selection.start.column - possible_emoji_short_code.len() as u32 - 1,
 2776                            );
 2777
 2778                            // Remove shortcode from buffer
 2779                            edits.push((
 2780                                emoji_shortcode_start..selection.start,
 2781                                "".to_string().into(),
 2782                            ));
 2783                            new_selections.push((
 2784                                Selection {
 2785                                    id: selection.id,
 2786                                    start: snapshot.anchor_after(emoji_shortcode_start),
 2787                                    end: snapshot.anchor_before(selection.start),
 2788                                    reversed: selection.reversed,
 2789                                    goal: selection.goal,
 2790                                },
 2791                                0,
 2792                            ));
 2793
 2794                            // Insert emoji
 2795                            let selection_start_anchor = snapshot.anchor_after(selection.start);
 2796                            new_selections.push((selection.map(|_| selection_start_anchor), 0));
 2797                            edits.push((selection.start..selection.end, emoji.to_string().into()));
 2798
 2799                            continue;
 2800                        }
 2801                    }
 2802                }
 2803            }
 2804
 2805            // If not handling any auto-close operation, then just replace the selected
 2806            // text with the given input and move the selection to the end of the
 2807            // newly inserted text.
 2808            let anchor = snapshot.anchor_after(selection.end);
 2809            if !self.linked_edit_ranges.is_empty() {
 2810                let start_anchor = snapshot.anchor_before(selection.start);
 2811
 2812                let is_word_char = text.chars().next().map_or(true, |char| {
 2813                    let classifier = snapshot.char_classifier_at(start_anchor.to_offset(&snapshot));
 2814                    classifier.is_word(char)
 2815                });
 2816
 2817                if is_word_char {
 2818                    if let Some(ranges) = self
 2819                        .linked_editing_ranges_for(start_anchor.text_anchor..anchor.text_anchor, cx)
 2820                    {
 2821                        for (buffer, edits) in ranges {
 2822                            linked_edits
 2823                                .entry(buffer.clone())
 2824                                .or_default()
 2825                                .extend(edits.into_iter().map(|range| (range, text.clone())));
 2826                        }
 2827                    }
 2828                }
 2829            }
 2830
 2831            new_selections.push((selection.map(|_| anchor), 0));
 2832            edits.push((selection.start..selection.end, text.clone()));
 2833        }
 2834
 2835        drop(snapshot);
 2836
 2837        self.transact(cx, |this, cx| {
 2838            this.buffer.update(cx, |buffer, cx| {
 2839                buffer.edit(edits, this.autoindent_mode.clone(), cx);
 2840            });
 2841            for (buffer, edits) in linked_edits {
 2842                buffer.update(cx, |buffer, cx| {
 2843                    let snapshot = buffer.snapshot();
 2844                    let edits = edits
 2845                        .into_iter()
 2846                        .map(|(range, text)| {
 2847                            use text::ToPoint as TP;
 2848                            let end_point = TP::to_point(&range.end, &snapshot);
 2849                            let start_point = TP::to_point(&range.start, &snapshot);
 2850                            (start_point..end_point, text)
 2851                        })
 2852                        .sorted_by_key(|(range, _)| range.start)
 2853                        .collect::<Vec<_>>();
 2854                    buffer.edit(edits, None, cx);
 2855                })
 2856            }
 2857            let new_anchor_selections = new_selections.iter().map(|e| &e.0);
 2858            let new_selection_deltas = new_selections.iter().map(|e| e.1);
 2859            let map = this.display_map.update(cx, |map, cx| map.snapshot(cx));
 2860            let new_selections = resolve_selections::<usize, _>(new_anchor_selections, &map)
 2861                .zip(new_selection_deltas)
 2862                .map(|(selection, delta)| Selection {
 2863                    id: selection.id,
 2864                    start: selection.start + delta,
 2865                    end: selection.end + delta,
 2866                    reversed: selection.reversed,
 2867                    goal: SelectionGoal::None,
 2868                })
 2869                .collect::<Vec<_>>();
 2870
 2871            let mut i = 0;
 2872            for (position, delta, selection_id, pair) in new_autoclose_regions {
 2873                let position = position.to_offset(&map.buffer_snapshot) + delta;
 2874                let start = map.buffer_snapshot.anchor_before(position);
 2875                let end = map.buffer_snapshot.anchor_after(position);
 2876                while let Some(existing_state) = this.autoclose_regions.get(i) {
 2877                    match existing_state.range.start.cmp(&start, &map.buffer_snapshot) {
 2878                        Ordering::Less => i += 1,
 2879                        Ordering::Greater => break,
 2880                        Ordering::Equal => {
 2881                            match end.cmp(&existing_state.range.end, &map.buffer_snapshot) {
 2882                                Ordering::Less => i += 1,
 2883                                Ordering::Equal => break,
 2884                                Ordering::Greater => break,
 2885                            }
 2886                        }
 2887                    }
 2888                }
 2889                this.autoclose_regions.insert(
 2890                    i,
 2891                    AutocloseRegion {
 2892                        selection_id,
 2893                        range: start..end,
 2894                        pair,
 2895                    },
 2896                );
 2897            }
 2898
 2899            let had_active_inline_completion = this.has_active_inline_completion();
 2900            this.change_selections_inner(Some(Autoscroll::fit()), false, cx, |s| {
 2901                s.select(new_selections)
 2902            });
 2903
 2904            if !bracket_inserted {
 2905                if let Some(on_type_format_task) =
 2906                    this.trigger_on_type_formatting(text.to_string(), cx)
 2907                {
 2908                    on_type_format_task.detach_and_log_err(cx);
 2909                }
 2910            }
 2911
 2912            let editor_settings = EditorSettings::get_global(cx);
 2913            if bracket_inserted
 2914                && (editor_settings.auto_signature_help
 2915                    || editor_settings.show_signature_help_after_edits)
 2916            {
 2917                this.show_signature_help(&ShowSignatureHelp, cx);
 2918            }
 2919
 2920            let trigger_in_words =
 2921                this.show_inline_completions_in_menu(cx) || !had_active_inline_completion;
 2922            this.trigger_completion_on_input(&text, trigger_in_words, cx);
 2923            linked_editing_ranges::refresh_linked_ranges(this, cx);
 2924            this.refresh_inline_completion(true, false, cx);
 2925        });
 2926    }
 2927
 2928    fn find_possible_emoji_shortcode_at_position(
 2929        snapshot: &MultiBufferSnapshot,
 2930        position: Point,
 2931    ) -> Option<String> {
 2932        let mut chars = Vec::new();
 2933        let mut found_colon = false;
 2934        for char in snapshot.reversed_chars_at(position).take(100) {
 2935            // Found a possible emoji shortcode in the middle of the buffer
 2936            if found_colon {
 2937                if char.is_whitespace() {
 2938                    chars.reverse();
 2939                    return Some(chars.iter().collect());
 2940                }
 2941                // If the previous character is not a whitespace, we are in the middle of a word
 2942                // and we only want to complete the shortcode if the word is made up of other emojis
 2943                let mut containing_word = String::new();
 2944                for ch in snapshot
 2945                    .reversed_chars_at(position)
 2946                    .skip(chars.len() + 1)
 2947                    .take(100)
 2948                {
 2949                    if ch.is_whitespace() {
 2950                        break;
 2951                    }
 2952                    containing_word.push(ch);
 2953                }
 2954                let containing_word = containing_word.chars().rev().collect::<String>();
 2955                if util::word_consists_of_emojis(containing_word.as_str()) {
 2956                    chars.reverse();
 2957                    return Some(chars.iter().collect());
 2958                }
 2959            }
 2960
 2961            if char.is_whitespace() || !char.is_ascii() {
 2962                return None;
 2963            }
 2964            if char == ':' {
 2965                found_colon = true;
 2966            } else {
 2967                chars.push(char);
 2968            }
 2969        }
 2970        // Found a possible emoji shortcode at the beginning of the buffer
 2971        chars.reverse();
 2972        Some(chars.iter().collect())
 2973    }
 2974
 2975    pub fn newline(&mut self, _: &Newline, cx: &mut ViewContext<Self>) {
 2976        self.transact(cx, |this, cx| {
 2977            let (edits, selection_fixup_info): (Vec<_>, Vec<_>) = {
 2978                let selections = this.selections.all::<usize>(cx);
 2979                let multi_buffer = this.buffer.read(cx);
 2980                let buffer = multi_buffer.snapshot(cx);
 2981                selections
 2982                    .iter()
 2983                    .map(|selection| {
 2984                        let start_point = selection.start.to_point(&buffer);
 2985                        let mut indent =
 2986                            buffer.indent_size_for_line(MultiBufferRow(start_point.row));
 2987                        indent.len = cmp::min(indent.len, start_point.column);
 2988                        let start = selection.start;
 2989                        let end = selection.end;
 2990                        let selection_is_empty = start == end;
 2991                        let language_scope = buffer.language_scope_at(start);
 2992                        let (comment_delimiter, insert_extra_newline) = if let Some(language) =
 2993                            &language_scope
 2994                        {
 2995                            let leading_whitespace_len = buffer
 2996                                .reversed_chars_at(start)
 2997                                .take_while(|c| c.is_whitespace() && *c != '\n')
 2998                                .map(|c| c.len_utf8())
 2999                                .sum::<usize>();
 3000
 3001                            let trailing_whitespace_len = buffer
 3002                                .chars_at(end)
 3003                                .take_while(|c| c.is_whitespace() && *c != '\n')
 3004                                .map(|c| c.len_utf8())
 3005                                .sum::<usize>();
 3006
 3007                            let insert_extra_newline =
 3008                                language.brackets().any(|(pair, enabled)| {
 3009                                    let pair_start = pair.start.trim_end();
 3010                                    let pair_end = pair.end.trim_start();
 3011
 3012                                    enabled
 3013                                        && pair.newline
 3014                                        && buffer.contains_str_at(
 3015                                            end + trailing_whitespace_len,
 3016                                            pair_end,
 3017                                        )
 3018                                        && buffer.contains_str_at(
 3019                                            (start - leading_whitespace_len)
 3020                                                .saturating_sub(pair_start.len()),
 3021                                            pair_start,
 3022                                        )
 3023                                });
 3024
 3025                            // Comment extension on newline is allowed only for cursor selections
 3026                            let comment_delimiter = maybe!({
 3027                                if !selection_is_empty {
 3028                                    return None;
 3029                                }
 3030
 3031                                if !multi_buffer.settings_at(0, cx).extend_comment_on_newline {
 3032                                    return None;
 3033                                }
 3034
 3035                                let delimiters = language.line_comment_prefixes();
 3036                                let max_len_of_delimiter =
 3037                                    delimiters.iter().map(|delimiter| delimiter.len()).max()?;
 3038                                let (snapshot, range) =
 3039                                    buffer.buffer_line_for_row(MultiBufferRow(start_point.row))?;
 3040
 3041                                let mut index_of_first_non_whitespace = 0;
 3042                                let comment_candidate = snapshot
 3043                                    .chars_for_range(range)
 3044                                    .skip_while(|c| {
 3045                                        let should_skip = c.is_whitespace();
 3046                                        if should_skip {
 3047                                            index_of_first_non_whitespace += 1;
 3048                                        }
 3049                                        should_skip
 3050                                    })
 3051                                    .take(max_len_of_delimiter)
 3052                                    .collect::<String>();
 3053                                let comment_prefix = delimiters.iter().find(|comment_prefix| {
 3054                                    comment_candidate.starts_with(comment_prefix.as_ref())
 3055                                })?;
 3056                                let cursor_is_placed_after_comment_marker =
 3057                                    index_of_first_non_whitespace + comment_prefix.len()
 3058                                        <= start_point.column as usize;
 3059                                if cursor_is_placed_after_comment_marker {
 3060                                    Some(comment_prefix.clone())
 3061                                } else {
 3062                                    None
 3063                                }
 3064                            });
 3065                            (comment_delimiter, insert_extra_newline)
 3066                        } else {
 3067                            (None, false)
 3068                        };
 3069
 3070                        let capacity_for_delimiter = comment_delimiter
 3071                            .as_deref()
 3072                            .map(str::len)
 3073                            .unwrap_or_default();
 3074                        let mut new_text =
 3075                            String::with_capacity(1 + capacity_for_delimiter + indent.len as usize);
 3076                        new_text.push('\n');
 3077                        new_text.extend(indent.chars());
 3078                        if let Some(delimiter) = &comment_delimiter {
 3079                            new_text.push_str(delimiter);
 3080                        }
 3081                        if insert_extra_newline {
 3082                            new_text = new_text.repeat(2);
 3083                        }
 3084
 3085                        let anchor = buffer.anchor_after(end);
 3086                        let new_selection = selection.map(|_| anchor);
 3087                        (
 3088                            (start..end, new_text),
 3089                            (insert_extra_newline, new_selection),
 3090                        )
 3091                    })
 3092                    .unzip()
 3093            };
 3094
 3095            this.edit_with_autoindent(edits, cx);
 3096            let buffer = this.buffer.read(cx).snapshot(cx);
 3097            let new_selections = selection_fixup_info
 3098                .into_iter()
 3099                .map(|(extra_newline_inserted, new_selection)| {
 3100                    let mut cursor = new_selection.end.to_point(&buffer);
 3101                    if extra_newline_inserted {
 3102                        cursor.row -= 1;
 3103                        cursor.column = buffer.line_len(MultiBufferRow(cursor.row));
 3104                    }
 3105                    new_selection.map(|_| cursor)
 3106                })
 3107                .collect();
 3108
 3109            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(new_selections));
 3110            this.refresh_inline_completion(true, false, cx);
 3111        });
 3112    }
 3113
 3114    pub fn newline_above(&mut self, _: &NewlineAbove, cx: &mut ViewContext<Self>) {
 3115        let buffer = self.buffer.read(cx);
 3116        let snapshot = buffer.snapshot(cx);
 3117
 3118        let mut edits = Vec::new();
 3119        let mut rows = Vec::new();
 3120
 3121        for (rows_inserted, selection) in self.selections.all_adjusted(cx).into_iter().enumerate() {
 3122            let cursor = selection.head();
 3123            let row = cursor.row;
 3124
 3125            let start_of_line = snapshot.clip_point(Point::new(row, 0), Bias::Left);
 3126
 3127            let newline = "\n".to_string();
 3128            edits.push((start_of_line..start_of_line, newline));
 3129
 3130            rows.push(row + rows_inserted as u32);
 3131        }
 3132
 3133        self.transact(cx, |editor, cx| {
 3134            editor.edit(edits, cx);
 3135
 3136            editor.change_selections(Some(Autoscroll::fit()), cx, |s| {
 3137                let mut index = 0;
 3138                s.move_cursors_with(|map, _, _| {
 3139                    let row = rows[index];
 3140                    index += 1;
 3141
 3142                    let point = Point::new(row, 0);
 3143                    let boundary = map.next_line_boundary(point).1;
 3144                    let clipped = map.clip_point(boundary, Bias::Left);
 3145
 3146                    (clipped, SelectionGoal::None)
 3147                });
 3148            });
 3149
 3150            let mut indent_edits = Vec::new();
 3151            let multibuffer_snapshot = editor.buffer.read(cx).snapshot(cx);
 3152            for row in rows {
 3153                let indents = multibuffer_snapshot.suggested_indents(row..row + 1, cx);
 3154                for (row, indent) in indents {
 3155                    if indent.len == 0 {
 3156                        continue;
 3157                    }
 3158
 3159                    let text = match indent.kind {
 3160                        IndentKind::Space => " ".repeat(indent.len as usize),
 3161                        IndentKind::Tab => "\t".repeat(indent.len as usize),
 3162                    };
 3163                    let point = Point::new(row.0, 0);
 3164                    indent_edits.push((point..point, text));
 3165                }
 3166            }
 3167            editor.edit(indent_edits, cx);
 3168        });
 3169    }
 3170
 3171    pub fn newline_below(&mut self, _: &NewlineBelow, cx: &mut ViewContext<Self>) {
 3172        let buffer = self.buffer.read(cx);
 3173        let snapshot = buffer.snapshot(cx);
 3174
 3175        let mut edits = Vec::new();
 3176        let mut rows = Vec::new();
 3177        let mut rows_inserted = 0;
 3178
 3179        for selection in self.selections.all_adjusted(cx) {
 3180            let cursor = selection.head();
 3181            let row = cursor.row;
 3182
 3183            let point = Point::new(row + 1, 0);
 3184            let start_of_line = snapshot.clip_point(point, Bias::Left);
 3185
 3186            let newline = "\n".to_string();
 3187            edits.push((start_of_line..start_of_line, newline));
 3188
 3189            rows_inserted += 1;
 3190            rows.push(row + rows_inserted);
 3191        }
 3192
 3193        self.transact(cx, |editor, cx| {
 3194            editor.edit(edits, cx);
 3195
 3196            editor.change_selections(Some(Autoscroll::fit()), cx, |s| {
 3197                let mut index = 0;
 3198                s.move_cursors_with(|map, _, _| {
 3199                    let row = rows[index];
 3200                    index += 1;
 3201
 3202                    let point = Point::new(row, 0);
 3203                    let boundary = map.next_line_boundary(point).1;
 3204                    let clipped = map.clip_point(boundary, Bias::Left);
 3205
 3206                    (clipped, SelectionGoal::None)
 3207                });
 3208            });
 3209
 3210            let mut indent_edits = Vec::new();
 3211            let multibuffer_snapshot = editor.buffer.read(cx).snapshot(cx);
 3212            for row in rows {
 3213                let indents = multibuffer_snapshot.suggested_indents(row..row + 1, cx);
 3214                for (row, indent) in indents {
 3215                    if indent.len == 0 {
 3216                        continue;
 3217                    }
 3218
 3219                    let text = match indent.kind {
 3220                        IndentKind::Space => " ".repeat(indent.len as usize),
 3221                        IndentKind::Tab => "\t".repeat(indent.len as usize),
 3222                    };
 3223                    let point = Point::new(row.0, 0);
 3224                    indent_edits.push((point..point, text));
 3225                }
 3226            }
 3227            editor.edit(indent_edits, cx);
 3228        });
 3229    }
 3230
 3231    pub fn insert(&mut self, text: &str, cx: &mut ViewContext<Self>) {
 3232        let autoindent = text.is_empty().not().then(|| AutoindentMode::Block {
 3233            original_indent_columns: Vec::new(),
 3234        });
 3235        self.insert_with_autoindent_mode(text, autoindent, cx);
 3236    }
 3237
 3238    fn insert_with_autoindent_mode(
 3239        &mut self,
 3240        text: &str,
 3241        autoindent_mode: Option<AutoindentMode>,
 3242        cx: &mut ViewContext<Self>,
 3243    ) {
 3244        if self.read_only(cx) {
 3245            return;
 3246        }
 3247
 3248        let text: Arc<str> = text.into();
 3249        self.transact(cx, |this, cx| {
 3250            let old_selections = this.selections.all_adjusted(cx);
 3251            let selection_anchors = this.buffer.update(cx, |buffer, cx| {
 3252                let anchors = {
 3253                    let snapshot = buffer.read(cx);
 3254                    old_selections
 3255                        .iter()
 3256                        .map(|s| {
 3257                            let anchor = snapshot.anchor_after(s.head());
 3258                            s.map(|_| anchor)
 3259                        })
 3260                        .collect::<Vec<_>>()
 3261                };
 3262                buffer.edit(
 3263                    old_selections
 3264                        .iter()
 3265                        .map(|s| (s.start..s.end, text.clone())),
 3266                    autoindent_mode,
 3267                    cx,
 3268                );
 3269                anchors
 3270            });
 3271
 3272            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 3273                s.select_anchors(selection_anchors);
 3274            })
 3275        });
 3276    }
 3277
 3278    fn trigger_completion_on_input(
 3279        &mut self,
 3280        text: &str,
 3281        trigger_in_words: bool,
 3282        cx: &mut ViewContext<Self>,
 3283    ) {
 3284        if self.is_completion_trigger(text, trigger_in_words, cx) {
 3285            self.show_completions(
 3286                &ShowCompletions {
 3287                    trigger: Some(text.to_owned()).filter(|x| !x.is_empty()),
 3288                },
 3289                cx,
 3290            );
 3291        } else {
 3292            self.hide_context_menu(cx);
 3293        }
 3294    }
 3295
 3296    fn is_completion_trigger(
 3297        &self,
 3298        text: &str,
 3299        trigger_in_words: bool,
 3300        cx: &mut ViewContext<Self>,
 3301    ) -> bool {
 3302        let position = self.selections.newest_anchor().head();
 3303        let multibuffer = self.buffer.read(cx);
 3304        let Some(buffer) = position
 3305            .buffer_id
 3306            .and_then(|buffer_id| multibuffer.buffer(buffer_id).clone())
 3307        else {
 3308            return false;
 3309        };
 3310
 3311        if let Some(completion_provider) = &self.completion_provider {
 3312            completion_provider.is_completion_trigger(
 3313                &buffer,
 3314                position.text_anchor,
 3315                text,
 3316                trigger_in_words,
 3317                cx,
 3318            )
 3319        } else {
 3320            false
 3321        }
 3322    }
 3323
 3324    /// If any empty selections is touching the start of its innermost containing autoclose
 3325    /// region, expand it to select the brackets.
 3326    fn select_autoclose_pair(&mut self, cx: &mut ViewContext<Self>) {
 3327        let selections = self.selections.all::<usize>(cx);
 3328        let buffer = self.buffer.read(cx).read(cx);
 3329        let new_selections = self
 3330            .selections_with_autoclose_regions(selections, &buffer)
 3331            .map(|(mut selection, region)| {
 3332                if !selection.is_empty() {
 3333                    return selection;
 3334                }
 3335
 3336                if let Some(region) = region {
 3337                    let mut range = region.range.to_offset(&buffer);
 3338                    if selection.start == range.start && range.start >= region.pair.start.len() {
 3339                        range.start -= region.pair.start.len();
 3340                        if buffer.contains_str_at(range.start, &region.pair.start)
 3341                            && buffer.contains_str_at(range.end, &region.pair.end)
 3342                        {
 3343                            range.end += region.pair.end.len();
 3344                            selection.start = range.start;
 3345                            selection.end = range.end;
 3346
 3347                            return selection;
 3348                        }
 3349                    }
 3350                }
 3351
 3352                let always_treat_brackets_as_autoclosed = buffer
 3353                    .settings_at(selection.start, cx)
 3354                    .always_treat_brackets_as_autoclosed;
 3355
 3356                if !always_treat_brackets_as_autoclosed {
 3357                    return selection;
 3358                }
 3359
 3360                if let Some(scope) = buffer.language_scope_at(selection.start) {
 3361                    for (pair, enabled) in scope.brackets() {
 3362                        if !enabled || !pair.close {
 3363                            continue;
 3364                        }
 3365
 3366                        if buffer.contains_str_at(selection.start, &pair.end) {
 3367                            let pair_start_len = pair.start.len();
 3368                            if buffer.contains_str_at(
 3369                                selection.start.saturating_sub(pair_start_len),
 3370                                &pair.start,
 3371                            ) {
 3372                                selection.start -= pair_start_len;
 3373                                selection.end += pair.end.len();
 3374
 3375                                return selection;
 3376                            }
 3377                        }
 3378                    }
 3379                }
 3380
 3381                selection
 3382            })
 3383            .collect();
 3384
 3385        drop(buffer);
 3386        self.change_selections(None, cx, |selections| selections.select(new_selections));
 3387    }
 3388
 3389    /// Iterate the given selections, and for each one, find the smallest surrounding
 3390    /// autoclose region. This uses the ordering of the selections and the autoclose
 3391    /// regions to avoid repeated comparisons.
 3392    fn selections_with_autoclose_regions<'a, D: ToOffset + Clone>(
 3393        &'a self,
 3394        selections: impl IntoIterator<Item = Selection<D>>,
 3395        buffer: &'a MultiBufferSnapshot,
 3396    ) -> impl Iterator<Item = (Selection<D>, Option<&'a AutocloseRegion>)> {
 3397        let mut i = 0;
 3398        let mut regions = self.autoclose_regions.as_slice();
 3399        selections.into_iter().map(move |selection| {
 3400            let range = selection.start.to_offset(buffer)..selection.end.to_offset(buffer);
 3401
 3402            let mut enclosing = None;
 3403            while let Some(pair_state) = regions.get(i) {
 3404                if pair_state.range.end.to_offset(buffer) < range.start {
 3405                    regions = &regions[i + 1..];
 3406                    i = 0;
 3407                } else if pair_state.range.start.to_offset(buffer) > range.end {
 3408                    break;
 3409                } else {
 3410                    if pair_state.selection_id == selection.id {
 3411                        enclosing = Some(pair_state);
 3412                    }
 3413                    i += 1;
 3414                }
 3415            }
 3416
 3417            (selection, enclosing)
 3418        })
 3419    }
 3420
 3421    /// Remove any autoclose regions that no longer contain their selection.
 3422    fn invalidate_autoclose_regions(
 3423        &mut self,
 3424        mut selections: &[Selection<Anchor>],
 3425        buffer: &MultiBufferSnapshot,
 3426    ) {
 3427        self.autoclose_regions.retain(|state| {
 3428            let mut i = 0;
 3429            while let Some(selection) = selections.get(i) {
 3430                if selection.end.cmp(&state.range.start, buffer).is_lt() {
 3431                    selections = &selections[1..];
 3432                    continue;
 3433                }
 3434                if selection.start.cmp(&state.range.end, buffer).is_gt() {
 3435                    break;
 3436                }
 3437                if selection.id == state.selection_id {
 3438                    return true;
 3439                } else {
 3440                    i += 1;
 3441                }
 3442            }
 3443            false
 3444        });
 3445    }
 3446
 3447    fn completion_query(buffer: &MultiBufferSnapshot, position: impl ToOffset) -> Option<String> {
 3448        let offset = position.to_offset(buffer);
 3449        let (word_range, kind) = buffer.surrounding_word(offset, true);
 3450        if offset > word_range.start && kind == Some(CharKind::Word) {
 3451            Some(
 3452                buffer
 3453                    .text_for_range(word_range.start..offset)
 3454                    .collect::<String>(),
 3455            )
 3456        } else {
 3457            None
 3458        }
 3459    }
 3460
 3461    pub fn toggle_inlay_hints(&mut self, _: &ToggleInlayHints, cx: &mut ViewContext<Self>) {
 3462        self.refresh_inlay_hints(
 3463            InlayHintRefreshReason::Toggle(!self.inlay_hint_cache.enabled),
 3464            cx,
 3465        );
 3466    }
 3467
 3468    pub fn inlay_hints_enabled(&self) -> bool {
 3469        self.inlay_hint_cache.enabled
 3470    }
 3471
 3472    fn refresh_inlay_hints(&mut self, reason: InlayHintRefreshReason, cx: &mut ViewContext<Self>) {
 3473        if self.semantics_provider.is_none() || self.mode != EditorMode::Full {
 3474            return;
 3475        }
 3476
 3477        let reason_description = reason.description();
 3478        let ignore_debounce = matches!(
 3479            reason,
 3480            InlayHintRefreshReason::SettingsChange(_)
 3481                | InlayHintRefreshReason::Toggle(_)
 3482                | InlayHintRefreshReason::ExcerptsRemoved(_)
 3483        );
 3484        let (invalidate_cache, required_languages) = match reason {
 3485            InlayHintRefreshReason::Toggle(enabled) => {
 3486                self.inlay_hint_cache.enabled = enabled;
 3487                if enabled {
 3488                    (InvalidationStrategy::RefreshRequested, None)
 3489                } else {
 3490                    self.inlay_hint_cache.clear();
 3491                    self.splice_inlays(
 3492                        self.visible_inlay_hints(cx)
 3493                            .iter()
 3494                            .map(|inlay| inlay.id)
 3495                            .collect(),
 3496                        Vec::new(),
 3497                        cx,
 3498                    );
 3499                    return;
 3500                }
 3501            }
 3502            InlayHintRefreshReason::SettingsChange(new_settings) => {
 3503                match self.inlay_hint_cache.update_settings(
 3504                    &self.buffer,
 3505                    new_settings,
 3506                    self.visible_inlay_hints(cx),
 3507                    cx,
 3508                ) {
 3509                    ControlFlow::Break(Some(InlaySplice {
 3510                        to_remove,
 3511                        to_insert,
 3512                    })) => {
 3513                        self.splice_inlays(to_remove, to_insert, cx);
 3514                        return;
 3515                    }
 3516                    ControlFlow::Break(None) => return,
 3517                    ControlFlow::Continue(()) => (InvalidationStrategy::RefreshRequested, None),
 3518                }
 3519            }
 3520            InlayHintRefreshReason::ExcerptsRemoved(excerpts_removed) => {
 3521                if let Some(InlaySplice {
 3522                    to_remove,
 3523                    to_insert,
 3524                }) = self.inlay_hint_cache.remove_excerpts(excerpts_removed)
 3525                {
 3526                    self.splice_inlays(to_remove, to_insert, cx);
 3527                }
 3528                return;
 3529            }
 3530            InlayHintRefreshReason::NewLinesShown => (InvalidationStrategy::None, None),
 3531            InlayHintRefreshReason::BufferEdited(buffer_languages) => {
 3532                (InvalidationStrategy::BufferEdited, Some(buffer_languages))
 3533            }
 3534            InlayHintRefreshReason::RefreshRequested => {
 3535                (InvalidationStrategy::RefreshRequested, None)
 3536            }
 3537        };
 3538
 3539        if let Some(InlaySplice {
 3540            to_remove,
 3541            to_insert,
 3542        }) = self.inlay_hint_cache.spawn_hint_refresh(
 3543            reason_description,
 3544            self.excerpts_for_inlay_hints_query(required_languages.as_ref(), cx),
 3545            invalidate_cache,
 3546            ignore_debounce,
 3547            cx,
 3548        ) {
 3549            self.splice_inlays(to_remove, to_insert, cx);
 3550        }
 3551    }
 3552
 3553    fn visible_inlay_hints(&self, cx: &ViewContext<Editor>) -> Vec<Inlay> {
 3554        self.display_map
 3555            .read(cx)
 3556            .current_inlays()
 3557            .filter(move |inlay| matches!(inlay.id, InlayId::Hint(_)))
 3558            .cloned()
 3559            .collect()
 3560    }
 3561
 3562    pub fn excerpts_for_inlay_hints_query(
 3563        &self,
 3564        restrict_to_languages: Option<&HashSet<Arc<Language>>>,
 3565        cx: &mut ViewContext<Editor>,
 3566    ) -> HashMap<ExcerptId, (Model<Buffer>, clock::Global, Range<usize>)> {
 3567        let Some(project) = self.project.as_ref() else {
 3568            return HashMap::default();
 3569        };
 3570        let project = project.read(cx);
 3571        let multi_buffer = self.buffer().read(cx);
 3572        let multi_buffer_snapshot = multi_buffer.snapshot(cx);
 3573        let multi_buffer_visible_start = self
 3574            .scroll_manager
 3575            .anchor()
 3576            .anchor
 3577            .to_point(&multi_buffer_snapshot);
 3578        let multi_buffer_visible_end = multi_buffer_snapshot.clip_point(
 3579            multi_buffer_visible_start
 3580                + Point::new(self.visible_line_count().unwrap_or(0.).ceil() as u32, 0),
 3581            Bias::Left,
 3582        );
 3583        let multi_buffer_visible_range = multi_buffer_visible_start..multi_buffer_visible_end;
 3584        multi_buffer_snapshot
 3585            .range_to_buffer_ranges(multi_buffer_visible_range)
 3586            .into_iter()
 3587            .filter(|(_, excerpt_visible_range)| !excerpt_visible_range.is_empty())
 3588            .filter_map(|(excerpt, excerpt_visible_range)| {
 3589                let buffer_file = project::File::from_dyn(excerpt.buffer().file())?;
 3590                let buffer_worktree = project.worktree_for_id(buffer_file.worktree_id(cx), cx)?;
 3591                let worktree_entry = buffer_worktree
 3592                    .read(cx)
 3593                    .entry_for_id(buffer_file.project_entry_id(cx)?)?;
 3594                if worktree_entry.is_ignored {
 3595                    return None;
 3596                }
 3597
 3598                let language = excerpt.buffer().language()?;
 3599                if let Some(restrict_to_languages) = restrict_to_languages {
 3600                    if !restrict_to_languages.contains(language) {
 3601                        return None;
 3602                    }
 3603                }
 3604                Some((
 3605                    excerpt.id(),
 3606                    (
 3607                        multi_buffer.buffer(excerpt.buffer_id()).unwrap(),
 3608                        excerpt.buffer().version().clone(),
 3609                        excerpt_visible_range,
 3610                    ),
 3611                ))
 3612            })
 3613            .collect()
 3614    }
 3615
 3616    pub fn text_layout_details(&self, cx: &WindowContext) -> TextLayoutDetails {
 3617        TextLayoutDetails {
 3618            text_system: cx.text_system().clone(),
 3619            editor_style: self.style.clone().unwrap(),
 3620            rem_size: cx.rem_size(),
 3621            scroll_anchor: self.scroll_manager.anchor(),
 3622            visible_rows: self.visible_line_count(),
 3623            vertical_scroll_margin: self.scroll_manager.vertical_scroll_margin,
 3624        }
 3625    }
 3626
 3627    pub fn splice_inlays(
 3628        &self,
 3629        to_remove: Vec<InlayId>,
 3630        to_insert: Vec<Inlay>,
 3631        cx: &mut ViewContext<Self>,
 3632    ) {
 3633        self.display_map.update(cx, |display_map, cx| {
 3634            display_map.splice_inlays(to_remove, to_insert, cx)
 3635        });
 3636        cx.notify();
 3637    }
 3638
 3639    fn trigger_on_type_formatting(
 3640        &self,
 3641        input: String,
 3642        cx: &mut ViewContext<Self>,
 3643    ) -> Option<Task<Result<()>>> {
 3644        if input.len() != 1 {
 3645            return None;
 3646        }
 3647
 3648        let project = self.project.as_ref()?;
 3649        let position = self.selections.newest_anchor().head();
 3650        let (buffer, buffer_position) = self
 3651            .buffer
 3652            .read(cx)
 3653            .text_anchor_for_position(position, cx)?;
 3654
 3655        let settings = language_settings::language_settings(
 3656            buffer
 3657                .read(cx)
 3658                .language_at(buffer_position)
 3659                .map(|l| l.name()),
 3660            buffer.read(cx).file(),
 3661            cx,
 3662        );
 3663        if !settings.use_on_type_format {
 3664            return None;
 3665        }
 3666
 3667        // OnTypeFormatting returns a list of edits, no need to pass them between Zed instances,
 3668        // hence we do LSP request & edit on host side only — add formats to host's history.
 3669        let push_to_lsp_host_history = true;
 3670        // If this is not the host, append its history with new edits.
 3671        let push_to_client_history = project.read(cx).is_via_collab();
 3672
 3673        let on_type_formatting = project.update(cx, |project, cx| {
 3674            project.on_type_format(
 3675                buffer.clone(),
 3676                buffer_position,
 3677                input,
 3678                push_to_lsp_host_history,
 3679                cx,
 3680            )
 3681        });
 3682        Some(cx.spawn(|editor, mut cx| async move {
 3683            if let Some(transaction) = on_type_formatting.await? {
 3684                if push_to_client_history {
 3685                    buffer
 3686                        .update(&mut cx, |buffer, _| {
 3687                            buffer.push_transaction(transaction, Instant::now());
 3688                        })
 3689                        .ok();
 3690                }
 3691                editor.update(&mut cx, |editor, cx| {
 3692                    editor.refresh_document_highlights(cx);
 3693                })?;
 3694            }
 3695            Ok(())
 3696        }))
 3697    }
 3698
 3699    pub fn show_completions(&mut self, options: &ShowCompletions, cx: &mut ViewContext<Self>) {
 3700        if self.pending_rename.is_some() {
 3701            return;
 3702        }
 3703
 3704        let Some(provider) = self.completion_provider.as_ref() else {
 3705            return;
 3706        };
 3707
 3708        if !self.snippet_stack.is_empty() && self.context_menu.borrow().as_ref().is_some() {
 3709            return;
 3710        }
 3711
 3712        let position = self.selections.newest_anchor().head();
 3713        let (buffer, buffer_position) =
 3714            if let Some(output) = self.buffer.read(cx).text_anchor_for_position(position, cx) {
 3715                output
 3716            } else {
 3717                return;
 3718            };
 3719        let show_completion_documentation = buffer
 3720            .read(cx)
 3721            .snapshot()
 3722            .settings_at(buffer_position, cx)
 3723            .show_completion_documentation;
 3724
 3725        let query = Self::completion_query(&self.buffer.read(cx).read(cx), position);
 3726
 3727        let trigger_kind = match &options.trigger {
 3728            Some(trigger) if buffer.read(cx).completion_triggers().contains(trigger) => {
 3729                CompletionTriggerKind::TRIGGER_CHARACTER
 3730            }
 3731            _ => CompletionTriggerKind::INVOKED,
 3732        };
 3733        let completion_context = CompletionContext {
 3734            trigger_character: options.trigger.as_ref().and_then(|trigger| {
 3735                if trigger_kind == CompletionTriggerKind::TRIGGER_CHARACTER {
 3736                    Some(String::from(trigger))
 3737                } else {
 3738                    None
 3739                }
 3740            }),
 3741            trigger_kind,
 3742        };
 3743        let completions = provider.completions(&buffer, buffer_position, completion_context, cx);
 3744        let sort_completions = provider.sort_completions();
 3745
 3746        let id = post_inc(&mut self.next_completion_id);
 3747        let task = cx.spawn(|editor, mut cx| {
 3748            async move {
 3749                editor.update(&mut cx, |this, _| {
 3750                    this.completion_tasks.retain(|(task_id, _)| *task_id >= id);
 3751                })?;
 3752                let completions = completions.await.log_err();
 3753                let menu = if let Some(completions) = completions {
 3754                    let mut menu = CompletionsMenu::new(
 3755                        id,
 3756                        sort_completions,
 3757                        show_completion_documentation,
 3758                        position,
 3759                        buffer.clone(),
 3760                        completions.into(),
 3761                    );
 3762
 3763                    menu.filter(query.as_deref(), cx.background_executor().clone())
 3764                        .await;
 3765
 3766                    menu.visible().then_some(menu)
 3767                } else {
 3768                    None
 3769                };
 3770
 3771                editor.update(&mut cx, |editor, cx| {
 3772                    match editor.context_menu.borrow().as_ref() {
 3773                        None => {}
 3774                        Some(CodeContextMenu::Completions(prev_menu)) => {
 3775                            if prev_menu.id > id {
 3776                                return;
 3777                            }
 3778                        }
 3779                        _ => return,
 3780                    }
 3781
 3782                    if editor.focus_handle.is_focused(cx) && menu.is_some() {
 3783                        let mut menu = menu.unwrap();
 3784                        menu.resolve_visible_completions(editor.completion_provider.as_deref(), cx);
 3785
 3786                        if editor.show_inline_completions_in_menu(cx) {
 3787                            if let Some(hint) = editor.inline_completion_menu_hint(cx) {
 3788                                menu.show_inline_completion_hint(hint);
 3789                            }
 3790                        } else {
 3791                            editor.discard_inline_completion(false, cx);
 3792                        }
 3793
 3794                        *editor.context_menu.borrow_mut() =
 3795                            Some(CodeContextMenu::Completions(menu));
 3796
 3797                        cx.notify();
 3798                    } else if editor.completion_tasks.len() <= 1 {
 3799                        // If there are no more completion tasks and the last menu was
 3800                        // empty, we should hide it.
 3801                        let was_hidden = editor.hide_context_menu(cx).is_none();
 3802                        // If it was already hidden and we don't show inline
 3803                        // completions in the menu, we should also show the
 3804                        // inline-completion when available.
 3805                        if was_hidden && editor.show_inline_completions_in_menu(cx) {
 3806                            editor.update_visible_inline_completion(cx);
 3807                        }
 3808                    }
 3809                })?;
 3810
 3811                Ok::<_, anyhow::Error>(())
 3812            }
 3813            .log_err()
 3814        });
 3815
 3816        self.completion_tasks.push((id, task));
 3817    }
 3818
 3819    pub fn confirm_completion(
 3820        &mut self,
 3821        action: &ConfirmCompletion,
 3822        cx: &mut ViewContext<Self>,
 3823    ) -> Option<Task<Result<()>>> {
 3824        self.do_completion(action.item_ix, CompletionIntent::Complete, cx)
 3825    }
 3826
 3827    pub fn compose_completion(
 3828        &mut self,
 3829        action: &ComposeCompletion,
 3830        cx: &mut ViewContext<Self>,
 3831    ) -> Option<Task<Result<()>>> {
 3832        self.do_completion(action.item_ix, CompletionIntent::Compose, cx)
 3833    }
 3834
 3835    fn do_completion(
 3836        &mut self,
 3837        item_ix: Option<usize>,
 3838        intent: CompletionIntent,
 3839        cx: &mut ViewContext<Editor>,
 3840    ) -> Option<Task<std::result::Result<(), anyhow::Error>>> {
 3841        use language::ToOffset as _;
 3842
 3843        {
 3844            let context_menu = self.context_menu.borrow();
 3845            if let CodeContextMenu::Completions(menu) = context_menu.as_ref()? {
 3846                let entries = menu.entries.borrow();
 3847                let entry = entries.get(item_ix.unwrap_or(menu.selected_item));
 3848                match entry {
 3849                    Some(CompletionEntry::InlineCompletionHint(
 3850                        InlineCompletionMenuHint::Loading,
 3851                    )) => return Some(Task::ready(Ok(()))),
 3852                    Some(CompletionEntry::InlineCompletionHint(InlineCompletionMenuHint::None)) => {
 3853                        drop(entries);
 3854                        drop(context_menu);
 3855                        self.context_menu_next(&Default::default(), cx);
 3856                        return Some(Task::ready(Ok(())));
 3857                    }
 3858                    _ => {}
 3859                }
 3860            }
 3861        }
 3862
 3863        let completions_menu =
 3864            if let CodeContextMenu::Completions(menu) = self.hide_context_menu(cx)? {
 3865                menu
 3866            } else {
 3867                return None;
 3868            };
 3869
 3870        let entries = completions_menu.entries.borrow();
 3871        let mat = entries.get(item_ix.unwrap_or(completions_menu.selected_item))?;
 3872        let mat = match mat {
 3873            CompletionEntry::InlineCompletionHint(_) => {
 3874                self.accept_inline_completion(&AcceptInlineCompletion, cx);
 3875                cx.stop_propagation();
 3876                return Some(Task::ready(Ok(())));
 3877            }
 3878            CompletionEntry::Match(mat) => {
 3879                if self.show_inline_completions_in_menu(cx) {
 3880                    self.discard_inline_completion(true, cx);
 3881                }
 3882                mat
 3883            }
 3884        };
 3885        let candidate_id = mat.candidate_id;
 3886        drop(entries);
 3887
 3888        let buffer_handle = completions_menu.buffer;
 3889        let completion = completions_menu
 3890            .completions
 3891            .borrow()
 3892            .get(candidate_id)?
 3893            .clone();
 3894        cx.stop_propagation();
 3895
 3896        let snippet;
 3897        let text;
 3898
 3899        if completion.is_snippet() {
 3900            snippet = Some(Snippet::parse(&completion.new_text).log_err()?);
 3901            text = snippet.as_ref().unwrap().text.clone();
 3902        } else {
 3903            snippet = None;
 3904            text = completion.new_text.clone();
 3905        };
 3906        let selections = self.selections.all::<usize>(cx);
 3907        let buffer = buffer_handle.read(cx);
 3908        let old_range = completion.old_range.to_offset(buffer);
 3909        let old_text = buffer.text_for_range(old_range.clone()).collect::<String>();
 3910
 3911        let newest_selection = self.selections.newest_anchor();
 3912        if newest_selection.start.buffer_id != Some(buffer_handle.read(cx).remote_id()) {
 3913            return None;
 3914        }
 3915
 3916        let lookbehind = newest_selection
 3917            .start
 3918            .text_anchor
 3919            .to_offset(buffer)
 3920            .saturating_sub(old_range.start);
 3921        let lookahead = old_range
 3922            .end
 3923            .saturating_sub(newest_selection.end.text_anchor.to_offset(buffer));
 3924        let mut common_prefix_len = old_text
 3925            .bytes()
 3926            .zip(text.bytes())
 3927            .take_while(|(a, b)| a == b)
 3928            .count();
 3929
 3930        let snapshot = self.buffer.read(cx).snapshot(cx);
 3931        let mut range_to_replace: Option<Range<isize>> = None;
 3932        let mut ranges = Vec::new();
 3933        let mut linked_edits = HashMap::<_, Vec<_>>::default();
 3934        for selection in &selections {
 3935            if snapshot.contains_str_at(selection.start.saturating_sub(lookbehind), &old_text) {
 3936                let start = selection.start.saturating_sub(lookbehind);
 3937                let end = selection.end + lookahead;
 3938                if selection.id == newest_selection.id {
 3939                    range_to_replace = Some(
 3940                        ((start + common_prefix_len) as isize - selection.start as isize)
 3941                            ..(end as isize - selection.start as isize),
 3942                    );
 3943                }
 3944                ranges.push(start + common_prefix_len..end);
 3945            } else {
 3946                common_prefix_len = 0;
 3947                ranges.clear();
 3948                ranges.extend(selections.iter().map(|s| {
 3949                    if s.id == newest_selection.id {
 3950                        range_to_replace = Some(
 3951                            old_range.start.to_offset_utf16(&snapshot).0 as isize
 3952                                - selection.start as isize
 3953                                ..old_range.end.to_offset_utf16(&snapshot).0 as isize
 3954                                    - selection.start as isize,
 3955                        );
 3956                        old_range.clone()
 3957                    } else {
 3958                        s.start..s.end
 3959                    }
 3960                }));
 3961                break;
 3962            }
 3963            if !self.linked_edit_ranges.is_empty() {
 3964                let start_anchor = snapshot.anchor_before(selection.head());
 3965                let end_anchor = snapshot.anchor_after(selection.tail());
 3966                if let Some(ranges) = self
 3967                    .linked_editing_ranges_for(start_anchor.text_anchor..end_anchor.text_anchor, cx)
 3968                {
 3969                    for (buffer, edits) in ranges {
 3970                        linked_edits.entry(buffer.clone()).or_default().extend(
 3971                            edits
 3972                                .into_iter()
 3973                                .map(|range| (range, text[common_prefix_len..].to_owned())),
 3974                        );
 3975                    }
 3976                }
 3977            }
 3978        }
 3979        let text = &text[common_prefix_len..];
 3980
 3981        cx.emit(EditorEvent::InputHandled {
 3982            utf16_range_to_replace: range_to_replace,
 3983            text: text.into(),
 3984        });
 3985
 3986        self.transact(cx, |this, cx| {
 3987            if let Some(mut snippet) = snippet {
 3988                snippet.text = text.to_string();
 3989                for tabstop in snippet
 3990                    .tabstops
 3991                    .iter_mut()
 3992                    .flat_map(|tabstop| tabstop.ranges.iter_mut())
 3993                {
 3994                    tabstop.start -= common_prefix_len as isize;
 3995                    tabstop.end -= common_prefix_len as isize;
 3996                }
 3997
 3998                this.insert_snippet(&ranges, snippet, cx).log_err();
 3999            } else {
 4000                this.buffer.update(cx, |buffer, cx| {
 4001                    buffer.edit(
 4002                        ranges.iter().map(|range| (range.clone(), text)),
 4003                        this.autoindent_mode.clone(),
 4004                        cx,
 4005                    );
 4006                });
 4007            }
 4008            for (buffer, edits) in linked_edits {
 4009                buffer.update(cx, |buffer, cx| {
 4010                    let snapshot = buffer.snapshot();
 4011                    let edits = edits
 4012                        .into_iter()
 4013                        .map(|(range, text)| {
 4014                            use text::ToPoint as TP;
 4015                            let end_point = TP::to_point(&range.end, &snapshot);
 4016                            let start_point = TP::to_point(&range.start, &snapshot);
 4017                            (start_point..end_point, text)
 4018                        })
 4019                        .sorted_by_key(|(range, _)| range.start)
 4020                        .collect::<Vec<_>>();
 4021                    buffer.edit(edits, None, cx);
 4022                })
 4023            }
 4024
 4025            this.refresh_inline_completion(true, false, cx);
 4026        });
 4027
 4028        let show_new_completions_on_confirm = completion
 4029            .confirm
 4030            .as_ref()
 4031            .map_or(false, |confirm| confirm(intent, cx));
 4032        if show_new_completions_on_confirm {
 4033            self.show_completions(&ShowCompletions { trigger: None }, cx);
 4034        }
 4035
 4036        let provider = self.completion_provider.as_ref()?;
 4037        drop(completion);
 4038        let apply_edits = provider.apply_additional_edits_for_completion(
 4039            buffer_handle,
 4040            completions_menu.completions.clone(),
 4041            candidate_id,
 4042            true,
 4043            cx,
 4044        );
 4045
 4046        let editor_settings = EditorSettings::get_global(cx);
 4047        if editor_settings.show_signature_help_after_edits || editor_settings.auto_signature_help {
 4048            // After the code completion is finished, users often want to know what signatures are needed.
 4049            // so we should automatically call signature_help
 4050            self.show_signature_help(&ShowSignatureHelp, cx);
 4051        }
 4052
 4053        Some(cx.foreground_executor().spawn(async move {
 4054            apply_edits.await?;
 4055            Ok(())
 4056        }))
 4057    }
 4058
 4059    pub fn toggle_code_actions(&mut self, action: &ToggleCodeActions, cx: &mut ViewContext<Self>) {
 4060        let mut context_menu = self.context_menu.borrow_mut();
 4061        if let Some(CodeContextMenu::CodeActions(code_actions)) = context_menu.as_ref() {
 4062            if code_actions.deployed_from_indicator == action.deployed_from_indicator {
 4063                // Toggle if we're selecting the same one
 4064                *context_menu = None;
 4065                cx.notify();
 4066                return;
 4067            } else {
 4068                // Otherwise, clear it and start a new one
 4069                *context_menu = None;
 4070                cx.notify();
 4071            }
 4072        }
 4073        drop(context_menu);
 4074        let snapshot = self.snapshot(cx);
 4075        let deployed_from_indicator = action.deployed_from_indicator;
 4076        let mut task = self.code_actions_task.take();
 4077        let action = action.clone();
 4078        cx.spawn(|editor, mut cx| async move {
 4079            while let Some(prev_task) = task {
 4080                prev_task.await.log_err();
 4081                task = editor.update(&mut cx, |this, _| this.code_actions_task.take())?;
 4082            }
 4083
 4084            let spawned_test_task = editor.update(&mut cx, |editor, cx| {
 4085                if editor.focus_handle.is_focused(cx) {
 4086                    let multibuffer_point = action
 4087                        .deployed_from_indicator
 4088                        .map(|row| DisplayPoint::new(row, 0).to_point(&snapshot))
 4089                        .unwrap_or_else(|| editor.selections.newest::<Point>(cx).head());
 4090                    let (buffer, buffer_row) = snapshot
 4091                        .buffer_snapshot
 4092                        .buffer_line_for_row(MultiBufferRow(multibuffer_point.row))
 4093                        .and_then(|(buffer_snapshot, range)| {
 4094                            editor
 4095                                .buffer
 4096                                .read(cx)
 4097                                .buffer(buffer_snapshot.remote_id())
 4098                                .map(|buffer| (buffer, range.start.row))
 4099                        })?;
 4100                    let (_, code_actions) = editor
 4101                        .available_code_actions
 4102                        .clone()
 4103                        .and_then(|(location, code_actions)| {
 4104                            let snapshot = location.buffer.read(cx).snapshot();
 4105                            let point_range = location.range.to_point(&snapshot);
 4106                            let point_range = point_range.start.row..=point_range.end.row;
 4107                            if point_range.contains(&buffer_row) {
 4108                                Some((location, code_actions))
 4109                            } else {
 4110                                None
 4111                            }
 4112                        })
 4113                        .unzip();
 4114                    let buffer_id = buffer.read(cx).remote_id();
 4115                    let tasks = editor
 4116                        .tasks
 4117                        .get(&(buffer_id, buffer_row))
 4118                        .map(|t| Arc::new(t.to_owned()));
 4119                    if tasks.is_none() && code_actions.is_none() {
 4120                        return None;
 4121                    }
 4122
 4123                    editor.completion_tasks.clear();
 4124                    editor.discard_inline_completion(false, cx);
 4125                    let task_context =
 4126                        tasks
 4127                            .as_ref()
 4128                            .zip(editor.project.clone())
 4129                            .map(|(tasks, project)| {
 4130                                Self::build_tasks_context(&project, &buffer, buffer_row, tasks, cx)
 4131                            });
 4132
 4133                    Some(cx.spawn(|editor, mut cx| async move {
 4134                        let task_context = match task_context {
 4135                            Some(task_context) => task_context.await,
 4136                            None => None,
 4137                        };
 4138                        let resolved_tasks =
 4139                            tasks.zip(task_context).map(|(tasks, task_context)| {
 4140                                Rc::new(ResolvedTasks {
 4141                                    templates: tasks.resolve(&task_context).collect(),
 4142                                    position: snapshot.buffer_snapshot.anchor_before(Point::new(
 4143                                        multibuffer_point.row,
 4144                                        tasks.column,
 4145                                    )),
 4146                                })
 4147                            });
 4148                        let spawn_straight_away = resolved_tasks
 4149                            .as_ref()
 4150                            .map_or(false, |tasks| tasks.templates.len() == 1)
 4151                            && code_actions
 4152                                .as_ref()
 4153                                .map_or(true, |actions| actions.is_empty());
 4154                        if let Ok(task) = editor.update(&mut cx, |editor, cx| {
 4155                            *editor.context_menu.borrow_mut() =
 4156                                Some(CodeContextMenu::CodeActions(CodeActionsMenu {
 4157                                    buffer,
 4158                                    actions: CodeActionContents {
 4159                                        tasks: resolved_tasks,
 4160                                        actions: code_actions,
 4161                                    },
 4162                                    selected_item: Default::default(),
 4163                                    scroll_handle: UniformListScrollHandle::default(),
 4164                                    deployed_from_indicator,
 4165                                }));
 4166                            if spawn_straight_away {
 4167                                if let Some(task) = editor.confirm_code_action(
 4168                                    &ConfirmCodeAction { item_ix: Some(0) },
 4169                                    cx,
 4170                                ) {
 4171                                    cx.notify();
 4172                                    return task;
 4173                                }
 4174                            }
 4175                            cx.notify();
 4176                            Task::ready(Ok(()))
 4177                        }) {
 4178                            task.await
 4179                        } else {
 4180                            Ok(())
 4181                        }
 4182                    }))
 4183                } else {
 4184                    Some(Task::ready(Ok(())))
 4185                }
 4186            })?;
 4187            if let Some(task) = spawned_test_task {
 4188                task.await?;
 4189            }
 4190
 4191            Ok::<_, anyhow::Error>(())
 4192        })
 4193        .detach_and_log_err(cx);
 4194    }
 4195
 4196    pub fn confirm_code_action(
 4197        &mut self,
 4198        action: &ConfirmCodeAction,
 4199        cx: &mut ViewContext<Self>,
 4200    ) -> Option<Task<Result<()>>> {
 4201        let actions_menu = if let CodeContextMenu::CodeActions(menu) = self.hide_context_menu(cx)? {
 4202            menu
 4203        } else {
 4204            return None;
 4205        };
 4206        let action_ix = action.item_ix.unwrap_or(actions_menu.selected_item);
 4207        let action = actions_menu.actions.get(action_ix)?;
 4208        let title = action.label();
 4209        let buffer = actions_menu.buffer;
 4210        let workspace = self.workspace()?;
 4211
 4212        match action {
 4213            CodeActionsItem::Task(task_source_kind, resolved_task) => {
 4214                workspace.update(cx, |workspace, cx| {
 4215                    workspace::tasks::schedule_resolved_task(
 4216                        workspace,
 4217                        task_source_kind,
 4218                        resolved_task,
 4219                        false,
 4220                        cx,
 4221                    );
 4222
 4223                    Some(Task::ready(Ok(())))
 4224                })
 4225            }
 4226            CodeActionsItem::CodeAction {
 4227                excerpt_id,
 4228                action,
 4229                provider,
 4230            } => {
 4231                let apply_code_action =
 4232                    provider.apply_code_action(buffer, action, excerpt_id, true, cx);
 4233                let workspace = workspace.downgrade();
 4234                Some(cx.spawn(|editor, cx| async move {
 4235                    let project_transaction = apply_code_action.await?;
 4236                    Self::open_project_transaction(
 4237                        &editor,
 4238                        workspace,
 4239                        project_transaction,
 4240                        title,
 4241                        cx,
 4242                    )
 4243                    .await
 4244                }))
 4245            }
 4246        }
 4247    }
 4248
 4249    pub async fn open_project_transaction(
 4250        this: &WeakView<Editor>,
 4251        workspace: WeakView<Workspace>,
 4252        transaction: ProjectTransaction,
 4253        title: String,
 4254        mut cx: AsyncWindowContext,
 4255    ) -> Result<()> {
 4256        let mut entries = transaction.0.into_iter().collect::<Vec<_>>();
 4257        cx.update(|cx| {
 4258            entries.sort_unstable_by_key(|(buffer, _)| {
 4259                buffer.read(cx).file().map(|f| f.path().clone())
 4260            });
 4261        })?;
 4262
 4263        // If the project transaction's edits are all contained within this editor, then
 4264        // avoid opening a new editor to display them.
 4265
 4266        if let Some((buffer, transaction)) = entries.first() {
 4267            if entries.len() == 1 {
 4268                let excerpt = this.update(&mut cx, |editor, cx| {
 4269                    editor
 4270                        .buffer()
 4271                        .read(cx)
 4272                        .excerpt_containing(editor.selections.newest_anchor().head(), cx)
 4273                })?;
 4274                if let Some((_, excerpted_buffer, excerpt_range)) = excerpt {
 4275                    if excerpted_buffer == *buffer {
 4276                        let all_edits_within_excerpt = buffer.read_with(&cx, |buffer, _| {
 4277                            let excerpt_range = excerpt_range.to_offset(buffer);
 4278                            buffer
 4279                                .edited_ranges_for_transaction::<usize>(transaction)
 4280                                .all(|range| {
 4281                                    excerpt_range.start <= range.start
 4282                                        && excerpt_range.end >= range.end
 4283                                })
 4284                        })?;
 4285
 4286                        if all_edits_within_excerpt {
 4287                            return Ok(());
 4288                        }
 4289                    }
 4290                }
 4291            }
 4292        } else {
 4293            return Ok(());
 4294        }
 4295
 4296        let mut ranges_to_highlight = Vec::new();
 4297        let excerpt_buffer = cx.new_model(|cx| {
 4298            let mut multibuffer = MultiBuffer::new(Capability::ReadWrite).with_title(title);
 4299            for (buffer_handle, transaction) in &entries {
 4300                let buffer = buffer_handle.read(cx);
 4301                ranges_to_highlight.extend(
 4302                    multibuffer.push_excerpts_with_context_lines(
 4303                        buffer_handle.clone(),
 4304                        buffer
 4305                            .edited_ranges_for_transaction::<usize>(transaction)
 4306                            .collect(),
 4307                        DEFAULT_MULTIBUFFER_CONTEXT,
 4308                        cx,
 4309                    ),
 4310                );
 4311            }
 4312            multibuffer.push_transaction(entries.iter().map(|(b, t)| (b, t)), cx);
 4313            multibuffer
 4314        })?;
 4315
 4316        workspace.update(&mut cx, |workspace, cx| {
 4317            let project = workspace.project().clone();
 4318            let editor =
 4319                cx.new_view(|cx| Editor::for_multibuffer(excerpt_buffer, Some(project), true, cx));
 4320            workspace.add_item_to_active_pane(Box::new(editor.clone()), None, true, cx);
 4321            editor.update(cx, |editor, cx| {
 4322                editor.highlight_background::<Self>(
 4323                    &ranges_to_highlight,
 4324                    |theme| theme.editor_highlighted_line_background,
 4325                    cx,
 4326                );
 4327            });
 4328        })?;
 4329
 4330        Ok(())
 4331    }
 4332
 4333    pub fn clear_code_action_providers(&mut self) {
 4334        self.code_action_providers.clear();
 4335        self.available_code_actions.take();
 4336    }
 4337
 4338    pub fn add_code_action_provider(
 4339        &mut self,
 4340        provider: Rc<dyn CodeActionProvider>,
 4341        cx: &mut ViewContext<Self>,
 4342    ) {
 4343        if self
 4344            .code_action_providers
 4345            .iter()
 4346            .any(|existing_provider| existing_provider.id() == provider.id())
 4347        {
 4348            return;
 4349        }
 4350
 4351        self.code_action_providers.push(provider);
 4352        self.refresh_code_actions(cx);
 4353    }
 4354
 4355    pub fn remove_code_action_provider(&mut self, id: Arc<str>, cx: &mut ViewContext<Self>) {
 4356        self.code_action_providers
 4357            .retain(|provider| provider.id() != id);
 4358        self.refresh_code_actions(cx);
 4359    }
 4360
 4361    fn refresh_code_actions(&mut self, cx: &mut ViewContext<Self>) -> Option<()> {
 4362        let buffer = self.buffer.read(cx);
 4363        let newest_selection = self.selections.newest_anchor().clone();
 4364        let (start_buffer, start) = buffer.text_anchor_for_position(newest_selection.start, cx)?;
 4365        let (end_buffer, end) = buffer.text_anchor_for_position(newest_selection.end, cx)?;
 4366        if start_buffer != end_buffer {
 4367            return None;
 4368        }
 4369
 4370        self.code_actions_task = Some(cx.spawn(|this, mut cx| async move {
 4371            cx.background_executor()
 4372                .timer(CODE_ACTIONS_DEBOUNCE_TIMEOUT)
 4373                .await;
 4374
 4375            let (providers, tasks) = this.update(&mut cx, |this, cx| {
 4376                let providers = this.code_action_providers.clone();
 4377                let tasks = this
 4378                    .code_action_providers
 4379                    .iter()
 4380                    .map(|provider| provider.code_actions(&start_buffer, start..end, cx))
 4381                    .collect::<Vec<_>>();
 4382                (providers, tasks)
 4383            })?;
 4384
 4385            let mut actions = Vec::new();
 4386            for (provider, provider_actions) in
 4387                providers.into_iter().zip(future::join_all(tasks).await)
 4388            {
 4389                if let Some(provider_actions) = provider_actions.log_err() {
 4390                    actions.extend(provider_actions.into_iter().map(|action| {
 4391                        AvailableCodeAction {
 4392                            excerpt_id: newest_selection.start.excerpt_id,
 4393                            action,
 4394                            provider: provider.clone(),
 4395                        }
 4396                    }));
 4397                }
 4398            }
 4399
 4400            this.update(&mut cx, |this, cx| {
 4401                this.available_code_actions = if actions.is_empty() {
 4402                    None
 4403                } else {
 4404                    Some((
 4405                        Location {
 4406                            buffer: start_buffer,
 4407                            range: start..end,
 4408                        },
 4409                        actions.into(),
 4410                    ))
 4411                };
 4412                cx.notify();
 4413            })
 4414        }));
 4415        None
 4416    }
 4417
 4418    fn start_inline_blame_timer(&mut self, cx: &mut ViewContext<Self>) {
 4419        if let Some(delay) = ProjectSettings::get_global(cx).git.inline_blame_delay() {
 4420            self.show_git_blame_inline = false;
 4421
 4422            self.show_git_blame_inline_delay_task = Some(cx.spawn(|this, mut cx| async move {
 4423                cx.background_executor().timer(delay).await;
 4424
 4425                this.update(&mut cx, |this, cx| {
 4426                    this.show_git_blame_inline = true;
 4427                    cx.notify();
 4428                })
 4429                .log_err();
 4430            }));
 4431        }
 4432    }
 4433
 4434    fn refresh_document_highlights(&mut self, cx: &mut ViewContext<Self>) -> Option<()> {
 4435        if self.pending_rename.is_some() {
 4436            return None;
 4437        }
 4438
 4439        let provider = self.semantics_provider.clone()?;
 4440        let buffer = self.buffer.read(cx);
 4441        let newest_selection = self.selections.newest_anchor().clone();
 4442        let cursor_position = newest_selection.head();
 4443        let (cursor_buffer, cursor_buffer_position) =
 4444            buffer.text_anchor_for_position(cursor_position, cx)?;
 4445        let (tail_buffer, _) = buffer.text_anchor_for_position(newest_selection.tail(), cx)?;
 4446        if cursor_buffer != tail_buffer {
 4447            return None;
 4448        }
 4449        let debounce = EditorSettings::get_global(cx).lsp_highlight_debounce;
 4450        self.document_highlights_task = Some(cx.spawn(|this, mut cx| async move {
 4451            cx.background_executor()
 4452                .timer(Duration::from_millis(debounce))
 4453                .await;
 4454
 4455            let highlights = if let Some(highlights) = cx
 4456                .update(|cx| {
 4457                    provider.document_highlights(&cursor_buffer, cursor_buffer_position, cx)
 4458                })
 4459                .ok()
 4460                .flatten()
 4461            {
 4462                highlights.await.log_err()
 4463            } else {
 4464                None
 4465            };
 4466
 4467            if let Some(highlights) = highlights {
 4468                this.update(&mut cx, |this, cx| {
 4469                    if this.pending_rename.is_some() {
 4470                        return;
 4471                    }
 4472
 4473                    let buffer_id = cursor_position.buffer_id;
 4474                    let buffer = this.buffer.read(cx);
 4475                    if !buffer
 4476                        .text_anchor_for_position(cursor_position, cx)
 4477                        .map_or(false, |(buffer, _)| buffer == cursor_buffer)
 4478                    {
 4479                        return;
 4480                    }
 4481
 4482                    let cursor_buffer_snapshot = cursor_buffer.read(cx);
 4483                    let mut write_ranges = Vec::new();
 4484                    let mut read_ranges = Vec::new();
 4485                    for highlight in highlights {
 4486                        for (excerpt_id, excerpt_range) in
 4487                            buffer.excerpts_for_buffer(&cursor_buffer, cx)
 4488                        {
 4489                            let start = highlight
 4490                                .range
 4491                                .start
 4492                                .max(&excerpt_range.context.start, cursor_buffer_snapshot);
 4493                            let end = highlight
 4494                                .range
 4495                                .end
 4496                                .min(&excerpt_range.context.end, cursor_buffer_snapshot);
 4497                            if start.cmp(&end, cursor_buffer_snapshot).is_ge() {
 4498                                continue;
 4499                            }
 4500
 4501                            let range = Anchor {
 4502                                buffer_id,
 4503                                excerpt_id,
 4504                                text_anchor: start,
 4505                            }..Anchor {
 4506                                buffer_id,
 4507                                excerpt_id,
 4508                                text_anchor: end,
 4509                            };
 4510                            if highlight.kind == lsp::DocumentHighlightKind::WRITE {
 4511                                write_ranges.push(range);
 4512                            } else {
 4513                                read_ranges.push(range);
 4514                            }
 4515                        }
 4516                    }
 4517
 4518                    this.highlight_background::<DocumentHighlightRead>(
 4519                        &read_ranges,
 4520                        |theme| theme.editor_document_highlight_read_background,
 4521                        cx,
 4522                    );
 4523                    this.highlight_background::<DocumentHighlightWrite>(
 4524                        &write_ranges,
 4525                        |theme| theme.editor_document_highlight_write_background,
 4526                        cx,
 4527                    );
 4528                    cx.notify();
 4529                })
 4530                .log_err();
 4531            }
 4532        }));
 4533        None
 4534    }
 4535
 4536    pub fn refresh_inline_completion(
 4537        &mut self,
 4538        debounce: bool,
 4539        user_requested: bool,
 4540        cx: &mut ViewContext<Self>,
 4541    ) -> Option<()> {
 4542        let provider = self.inline_completion_provider()?;
 4543        let cursor = self.selections.newest_anchor().head();
 4544        let (buffer, cursor_buffer_position) =
 4545            self.buffer.read(cx).text_anchor_for_position(cursor, cx)?;
 4546
 4547        if !user_requested
 4548            && (!self.enable_inline_completions
 4549                || !self.should_show_inline_completions(&buffer, cursor_buffer_position, cx)
 4550                || !self.is_focused(cx)
 4551                || buffer.read(cx).is_empty())
 4552        {
 4553            self.discard_inline_completion(false, cx);
 4554            return None;
 4555        }
 4556
 4557        self.update_visible_inline_completion(cx);
 4558        provider.refresh(buffer, cursor_buffer_position, debounce, cx);
 4559        Some(())
 4560    }
 4561
 4562    fn cycle_inline_completion(
 4563        &mut self,
 4564        direction: Direction,
 4565        cx: &mut ViewContext<Self>,
 4566    ) -> Option<()> {
 4567        let provider = self.inline_completion_provider()?;
 4568        let cursor = self.selections.newest_anchor().head();
 4569        let (buffer, cursor_buffer_position) =
 4570            self.buffer.read(cx).text_anchor_for_position(cursor, cx)?;
 4571        if !self.enable_inline_completions
 4572            || !self.should_show_inline_completions(&buffer, cursor_buffer_position, cx)
 4573        {
 4574            return None;
 4575        }
 4576
 4577        provider.cycle(buffer, cursor_buffer_position, direction, cx);
 4578        self.update_visible_inline_completion(cx);
 4579
 4580        Some(())
 4581    }
 4582
 4583    pub fn show_inline_completion(&mut self, _: &ShowInlineCompletion, cx: &mut ViewContext<Self>) {
 4584        if !self.has_active_inline_completion() {
 4585            self.refresh_inline_completion(false, true, cx);
 4586            return;
 4587        }
 4588
 4589        self.update_visible_inline_completion(cx);
 4590    }
 4591
 4592    pub fn display_cursor_names(&mut self, _: &DisplayCursorNames, cx: &mut ViewContext<Self>) {
 4593        self.show_cursor_names(cx);
 4594    }
 4595
 4596    fn show_cursor_names(&mut self, cx: &mut ViewContext<Self>) {
 4597        self.show_cursor_names = true;
 4598        cx.notify();
 4599        cx.spawn(|this, mut cx| async move {
 4600            cx.background_executor().timer(CURSORS_VISIBLE_FOR).await;
 4601            this.update(&mut cx, |this, cx| {
 4602                this.show_cursor_names = false;
 4603                cx.notify()
 4604            })
 4605            .ok()
 4606        })
 4607        .detach();
 4608    }
 4609
 4610    pub fn next_inline_completion(&mut self, _: &NextInlineCompletion, cx: &mut ViewContext<Self>) {
 4611        if self.has_active_inline_completion() {
 4612            self.cycle_inline_completion(Direction::Next, cx);
 4613        } else {
 4614            let is_copilot_disabled = self.refresh_inline_completion(false, true, cx).is_none();
 4615            if is_copilot_disabled {
 4616                cx.propagate();
 4617            }
 4618        }
 4619    }
 4620
 4621    pub fn previous_inline_completion(
 4622        &mut self,
 4623        _: &PreviousInlineCompletion,
 4624        cx: &mut ViewContext<Self>,
 4625    ) {
 4626        if self.has_active_inline_completion() {
 4627            self.cycle_inline_completion(Direction::Prev, cx);
 4628        } else {
 4629            let is_copilot_disabled = self.refresh_inline_completion(false, true, cx).is_none();
 4630            if is_copilot_disabled {
 4631                cx.propagate();
 4632            }
 4633        }
 4634    }
 4635
 4636    pub fn accept_inline_completion(
 4637        &mut self,
 4638        _: &AcceptInlineCompletion,
 4639        cx: &mut ViewContext<Self>,
 4640    ) {
 4641        let buffer = self.buffer.read(cx);
 4642        let snapshot = buffer.snapshot(cx);
 4643        let selection = self.selections.newest_adjusted(cx);
 4644        let cursor = selection.head();
 4645        let current_indent = snapshot.indent_size_for_line(MultiBufferRow(cursor.row));
 4646        let suggested_indents = snapshot.suggested_indents([cursor.row], cx);
 4647        if let Some(suggested_indent) = suggested_indents.get(&MultiBufferRow(cursor.row)).copied()
 4648        {
 4649            if cursor.column < suggested_indent.len
 4650                && cursor.column <= current_indent.len
 4651                && current_indent.len <= suggested_indent.len
 4652            {
 4653                self.tab(&Default::default(), cx);
 4654                return;
 4655            }
 4656        }
 4657
 4658        if self.show_inline_completions_in_menu(cx) {
 4659            self.hide_context_menu(cx);
 4660        }
 4661
 4662        let Some(active_inline_completion) = self.active_inline_completion.as_ref() else {
 4663            return;
 4664        };
 4665
 4666        self.report_inline_completion_event(true, cx);
 4667
 4668        match &active_inline_completion.completion {
 4669            InlineCompletion::Move(position) => {
 4670                let position = *position;
 4671                self.change_selections(Some(Autoscroll::newest()), cx, |selections| {
 4672                    selections.select_anchor_ranges([position..position]);
 4673                });
 4674            }
 4675            InlineCompletion::Edit(edits) => {
 4676                if let Some(provider) = self.inline_completion_provider() {
 4677                    provider.accept(cx);
 4678                }
 4679
 4680                let snapshot = self.buffer.read(cx).snapshot(cx);
 4681                let last_edit_end = edits.last().unwrap().0.end.bias_right(&snapshot);
 4682
 4683                self.buffer.update(cx, |buffer, cx| {
 4684                    buffer.edit(edits.iter().cloned(), None, cx)
 4685                });
 4686
 4687                self.change_selections(None, cx, |s| {
 4688                    s.select_anchor_ranges([last_edit_end..last_edit_end])
 4689                });
 4690
 4691                self.update_visible_inline_completion(cx);
 4692                if self.active_inline_completion.is_none() {
 4693                    self.refresh_inline_completion(true, true, cx);
 4694                }
 4695
 4696                cx.notify();
 4697            }
 4698        }
 4699    }
 4700
 4701    pub fn accept_partial_inline_completion(
 4702        &mut self,
 4703        _: &AcceptPartialInlineCompletion,
 4704        cx: &mut ViewContext<Self>,
 4705    ) {
 4706        let Some(active_inline_completion) = self.active_inline_completion.as_ref() else {
 4707            return;
 4708        };
 4709        if self.selections.count() != 1 {
 4710            return;
 4711        }
 4712
 4713        self.report_inline_completion_event(true, cx);
 4714
 4715        match &active_inline_completion.completion {
 4716            InlineCompletion::Move(position) => {
 4717                let position = *position;
 4718                self.change_selections(Some(Autoscroll::newest()), cx, |selections| {
 4719                    selections.select_anchor_ranges([position..position]);
 4720                });
 4721            }
 4722            InlineCompletion::Edit(edits) => {
 4723                if edits.len() == 1 && edits[0].0.start == edits[0].0.end {
 4724                    let text = edits[0].1.as_str();
 4725                    let mut partial_completion = text
 4726                        .chars()
 4727                        .by_ref()
 4728                        .take_while(|c| c.is_alphabetic())
 4729                        .collect::<String>();
 4730                    if partial_completion.is_empty() {
 4731                        partial_completion = text
 4732                            .chars()
 4733                            .by_ref()
 4734                            .take_while(|c| c.is_whitespace() || !c.is_alphabetic())
 4735                            .collect::<String>();
 4736                    }
 4737
 4738                    cx.emit(EditorEvent::InputHandled {
 4739                        utf16_range_to_replace: None,
 4740                        text: partial_completion.clone().into(),
 4741                    });
 4742
 4743                    self.insert_with_autoindent_mode(&partial_completion, None, cx);
 4744
 4745                    self.refresh_inline_completion(true, true, cx);
 4746                    cx.notify();
 4747                }
 4748            }
 4749        }
 4750    }
 4751
 4752    fn discard_inline_completion(
 4753        &mut self,
 4754        should_report_inline_completion_event: bool,
 4755        cx: &mut ViewContext<Self>,
 4756    ) -> bool {
 4757        if should_report_inline_completion_event {
 4758            self.report_inline_completion_event(false, cx);
 4759        }
 4760
 4761        if let Some(provider) = self.inline_completion_provider() {
 4762            provider.discard(cx);
 4763        }
 4764
 4765        self.take_active_inline_completion(cx).is_some()
 4766    }
 4767
 4768    fn report_inline_completion_event(&self, accepted: bool, cx: &AppContext) {
 4769        let Some(provider) = self.inline_completion_provider() else {
 4770            return;
 4771        };
 4772
 4773        let Some((_, buffer, _)) = self
 4774            .buffer
 4775            .read(cx)
 4776            .excerpt_containing(self.selections.newest_anchor().head(), cx)
 4777        else {
 4778            return;
 4779        };
 4780
 4781        let extension = buffer
 4782            .read(cx)
 4783            .file()
 4784            .and_then(|file| Some(file.path().extension()?.to_string_lossy().to_string()));
 4785
 4786        let event_type = match accepted {
 4787            true => "Inline Completion Accepted",
 4788            false => "Inline Completion Discarded",
 4789        };
 4790        telemetry::event!(
 4791            event_type,
 4792            provider = provider.name(),
 4793            suggestion_accepted = accepted,
 4794            file_extension = extension,
 4795        );
 4796    }
 4797
 4798    pub fn has_active_inline_completion(&self) -> bool {
 4799        self.active_inline_completion.is_some()
 4800    }
 4801
 4802    fn take_active_inline_completion(
 4803        &mut self,
 4804        cx: &mut ViewContext<Self>,
 4805    ) -> Option<InlineCompletion> {
 4806        let active_inline_completion = self.active_inline_completion.take()?;
 4807        self.splice_inlays(active_inline_completion.inlay_ids, Default::default(), cx);
 4808        self.clear_highlights::<InlineCompletionHighlight>(cx);
 4809        Some(active_inline_completion.completion)
 4810    }
 4811
 4812    fn update_visible_inline_completion(&mut self, cx: &mut ViewContext<Self>) -> Option<()> {
 4813        let selection = self.selections.newest_anchor();
 4814        let cursor = selection.head();
 4815        let multibuffer = self.buffer.read(cx).snapshot(cx);
 4816        let offset_selection = selection.map(|endpoint| endpoint.to_offset(&multibuffer));
 4817        let excerpt_id = cursor.excerpt_id;
 4818
 4819        let completions_menu_has_precedence = !self.show_inline_completions_in_menu(cx)
 4820            && (self.context_menu.borrow().is_some()
 4821                || (!self.completion_tasks.is_empty() && !self.has_active_inline_completion()));
 4822        if completions_menu_has_precedence
 4823            || !offset_selection.is_empty()
 4824            || !self.enable_inline_completions
 4825            || self
 4826                .active_inline_completion
 4827                .as_ref()
 4828                .map_or(false, |completion| {
 4829                    let invalidation_range = completion.invalidation_range.to_offset(&multibuffer);
 4830                    let invalidation_range = invalidation_range.start..=invalidation_range.end;
 4831                    !invalidation_range.contains(&offset_selection.head())
 4832                })
 4833        {
 4834            self.discard_inline_completion(false, cx);
 4835            return None;
 4836        }
 4837
 4838        self.take_active_inline_completion(cx);
 4839        let provider = self.inline_completion_provider()?;
 4840
 4841        let (buffer, cursor_buffer_position) =
 4842            self.buffer.read(cx).text_anchor_for_position(cursor, cx)?;
 4843
 4844        let completion = provider.suggest(&buffer, cursor_buffer_position, cx)?;
 4845        let edits = completion
 4846            .edits
 4847            .into_iter()
 4848            .flat_map(|(range, new_text)| {
 4849                let start = multibuffer.anchor_in_excerpt(excerpt_id, range.start)?;
 4850                let end = multibuffer.anchor_in_excerpt(excerpt_id, range.end)?;
 4851                Some((start..end, new_text))
 4852            })
 4853            .collect::<Vec<_>>();
 4854        if edits.is_empty() {
 4855            return None;
 4856        }
 4857
 4858        let first_edit_start = edits.first().unwrap().0.start;
 4859        let edit_start_row = first_edit_start
 4860            .to_point(&multibuffer)
 4861            .row
 4862            .saturating_sub(2);
 4863
 4864        let last_edit_end = edits.last().unwrap().0.end;
 4865        let edit_end_row = cmp::min(
 4866            multibuffer.max_point().row,
 4867            last_edit_end.to_point(&multibuffer).row + 2,
 4868        );
 4869
 4870        let cursor_row = cursor.to_point(&multibuffer).row;
 4871
 4872        let mut inlay_ids = Vec::new();
 4873        let invalidation_row_range;
 4874        let completion;
 4875        if cursor_row < edit_start_row {
 4876            invalidation_row_range = cursor_row..edit_end_row;
 4877            completion = InlineCompletion::Move(first_edit_start);
 4878        } else if cursor_row > edit_end_row {
 4879            invalidation_row_range = edit_start_row..cursor_row;
 4880            completion = InlineCompletion::Move(first_edit_start);
 4881        } else {
 4882            if edits
 4883                .iter()
 4884                .all(|(range, _)| range.to_offset(&multibuffer).is_empty())
 4885            {
 4886                let mut inlays = Vec::new();
 4887                for (range, new_text) in &edits {
 4888                    let inlay = Inlay::inline_completion(
 4889                        post_inc(&mut self.next_inlay_id),
 4890                        range.start,
 4891                        new_text.as_str(),
 4892                    );
 4893                    inlay_ids.push(inlay.id);
 4894                    inlays.push(inlay);
 4895                }
 4896
 4897                self.splice_inlays(vec![], inlays, cx);
 4898            } else {
 4899                let background_color = cx.theme().status().deleted_background;
 4900                self.highlight_text::<InlineCompletionHighlight>(
 4901                    edits.iter().map(|(range, _)| range.clone()).collect(),
 4902                    HighlightStyle {
 4903                        background_color: Some(background_color),
 4904                        ..Default::default()
 4905                    },
 4906                    cx,
 4907                );
 4908            }
 4909
 4910            invalidation_row_range = edit_start_row..edit_end_row;
 4911            completion = InlineCompletion::Edit(edits);
 4912        };
 4913
 4914        let invalidation_range = multibuffer
 4915            .anchor_before(Point::new(invalidation_row_range.start, 0))
 4916            ..multibuffer.anchor_after(Point::new(
 4917                invalidation_row_range.end,
 4918                multibuffer.line_len(MultiBufferRow(invalidation_row_range.end)),
 4919            ));
 4920
 4921        self.active_inline_completion = Some(InlineCompletionState {
 4922            inlay_ids,
 4923            completion,
 4924            invalidation_range,
 4925        });
 4926
 4927        if self.show_inline_completions_in_menu(cx) && self.has_active_completions_menu() {
 4928            if let Some(hint) = self.inline_completion_menu_hint(cx) {
 4929                match self.context_menu.borrow_mut().as_mut() {
 4930                    Some(CodeContextMenu::Completions(menu)) => {
 4931                        menu.show_inline_completion_hint(hint);
 4932                    }
 4933                    _ => {}
 4934                }
 4935            }
 4936        }
 4937
 4938        cx.notify();
 4939
 4940        Some(())
 4941    }
 4942
 4943    fn inline_completion_menu_hint(
 4944        &mut self,
 4945        cx: &mut ViewContext<Self>,
 4946    ) -> Option<InlineCompletionMenuHint> {
 4947        let provider = self.inline_completion_provider()?;
 4948        if self.has_active_inline_completion() {
 4949            let editor_snapshot = self.snapshot(cx);
 4950
 4951            let text = match &self.active_inline_completion.as_ref()?.completion {
 4952                InlineCompletion::Edit(edits) => {
 4953                    inline_completion_edit_text(&editor_snapshot, edits, true, cx)
 4954                }
 4955                InlineCompletion::Move(target) => {
 4956                    let target_point =
 4957                        target.to_point(&editor_snapshot.display_snapshot.buffer_snapshot);
 4958                    let target_line = target_point.row + 1;
 4959                    InlineCompletionText::Move(
 4960                        format!("Jump to edit in line {}", target_line).into(),
 4961                    )
 4962                }
 4963            };
 4964
 4965            Some(InlineCompletionMenuHint::Loaded { text })
 4966        } else if provider.is_refreshing(cx) {
 4967            Some(InlineCompletionMenuHint::Loading)
 4968        } else {
 4969            Some(InlineCompletionMenuHint::None)
 4970        }
 4971    }
 4972
 4973    pub fn inline_completion_provider(&self) -> Option<Arc<dyn InlineCompletionProviderHandle>> {
 4974        Some(self.inline_completion_provider.as_ref()?.provider.clone())
 4975    }
 4976
 4977    fn show_inline_completions_in_menu(&self, cx: &AppContext) -> bool {
 4978        EditorSettings::get_global(cx).show_inline_completions_in_menu
 4979            && self
 4980                .inline_completion_provider()
 4981                .map_or(false, |provider| provider.show_completions_in_menu())
 4982    }
 4983
 4984    fn render_code_actions_indicator(
 4985        &self,
 4986        _style: &EditorStyle,
 4987        row: DisplayRow,
 4988        is_active: bool,
 4989        cx: &mut ViewContext<Self>,
 4990    ) -> Option<IconButton> {
 4991        if self.available_code_actions.is_some() {
 4992            Some(
 4993                IconButton::new("code_actions_indicator", ui::IconName::Bolt)
 4994                    .shape(ui::IconButtonShape::Square)
 4995                    .icon_size(IconSize::XSmall)
 4996                    .icon_color(Color::Muted)
 4997                    .toggle_state(is_active)
 4998                    .tooltip({
 4999                        let focus_handle = self.focus_handle.clone();
 5000                        move |cx| {
 5001                            Tooltip::for_action_in(
 5002                                "Toggle Code Actions",
 5003                                &ToggleCodeActions {
 5004                                    deployed_from_indicator: None,
 5005                                },
 5006                                &focus_handle,
 5007                                cx,
 5008                            )
 5009                        }
 5010                    })
 5011                    .on_click(cx.listener(move |editor, _e, cx| {
 5012                        editor.focus(cx);
 5013                        editor.toggle_code_actions(
 5014                            &ToggleCodeActions {
 5015                                deployed_from_indicator: Some(row),
 5016                            },
 5017                            cx,
 5018                        );
 5019                    })),
 5020            )
 5021        } else {
 5022            None
 5023        }
 5024    }
 5025
 5026    fn clear_tasks(&mut self) {
 5027        self.tasks.clear()
 5028    }
 5029
 5030    fn insert_tasks(&mut self, key: (BufferId, BufferRow), value: RunnableTasks) {
 5031        if self.tasks.insert(key, value).is_some() {
 5032            // This case should hopefully be rare, but just in case...
 5033            log::error!("multiple different run targets found on a single line, only the last target will be rendered")
 5034        }
 5035    }
 5036
 5037    fn build_tasks_context(
 5038        project: &Model<Project>,
 5039        buffer: &Model<Buffer>,
 5040        buffer_row: u32,
 5041        tasks: &Arc<RunnableTasks>,
 5042        cx: &mut ViewContext<Self>,
 5043    ) -> Task<Option<task::TaskContext>> {
 5044        let position = Point::new(buffer_row, tasks.column);
 5045        let range_start = buffer.read(cx).anchor_at(position, Bias::Right);
 5046        let location = Location {
 5047            buffer: buffer.clone(),
 5048            range: range_start..range_start,
 5049        };
 5050        // Fill in the environmental variables from the tree-sitter captures
 5051        let mut captured_task_variables = TaskVariables::default();
 5052        for (capture_name, value) in tasks.extra_variables.clone() {
 5053            captured_task_variables.insert(
 5054                task::VariableName::Custom(capture_name.into()),
 5055                value.clone(),
 5056            );
 5057        }
 5058        project.update(cx, |project, cx| {
 5059            project.task_store().update(cx, |task_store, cx| {
 5060                task_store.task_context_for_location(captured_task_variables, location, cx)
 5061            })
 5062        })
 5063    }
 5064
 5065    pub fn spawn_nearest_task(&mut self, action: &SpawnNearestTask, cx: &mut ViewContext<Self>) {
 5066        let Some((workspace, _)) = self.workspace.clone() else {
 5067            return;
 5068        };
 5069        let Some(project) = self.project.clone() else {
 5070            return;
 5071        };
 5072
 5073        // Try to find a closest, enclosing node using tree-sitter that has a
 5074        // task
 5075        let Some((buffer, buffer_row, tasks)) = self
 5076            .find_enclosing_node_task(cx)
 5077            // Or find the task that's closest in row-distance.
 5078            .or_else(|| self.find_closest_task(cx))
 5079        else {
 5080            return;
 5081        };
 5082
 5083        let reveal_strategy = action.reveal;
 5084        let task_context = Self::build_tasks_context(&project, &buffer, buffer_row, &tasks, cx);
 5085        cx.spawn(|_, mut cx| async move {
 5086            let context = task_context.await?;
 5087            let (task_source_kind, mut resolved_task) = tasks.resolve(&context).next()?;
 5088
 5089            let resolved = resolved_task.resolved.as_mut()?;
 5090            resolved.reveal = reveal_strategy;
 5091
 5092            workspace
 5093                .update(&mut cx, |workspace, cx| {
 5094                    workspace::tasks::schedule_resolved_task(
 5095                        workspace,
 5096                        task_source_kind,
 5097                        resolved_task,
 5098                        false,
 5099                        cx,
 5100                    );
 5101                })
 5102                .ok()
 5103        })
 5104        .detach();
 5105    }
 5106
 5107    fn find_closest_task(
 5108        &mut self,
 5109        cx: &mut ViewContext<Self>,
 5110    ) -> Option<(Model<Buffer>, u32, Arc<RunnableTasks>)> {
 5111        let cursor_row = self.selections.newest_adjusted(cx).head().row;
 5112
 5113        let ((buffer_id, row), tasks) = self
 5114            .tasks
 5115            .iter()
 5116            .min_by_key(|((_, row), _)| cursor_row.abs_diff(*row))?;
 5117
 5118        let buffer = self.buffer.read(cx).buffer(*buffer_id)?;
 5119        let tasks = Arc::new(tasks.to_owned());
 5120        Some((buffer, *row, tasks))
 5121    }
 5122
 5123    fn find_enclosing_node_task(
 5124        &mut self,
 5125        cx: &mut ViewContext<Self>,
 5126    ) -> Option<(Model<Buffer>, u32, Arc<RunnableTasks>)> {
 5127        let snapshot = self.buffer.read(cx).snapshot(cx);
 5128        let offset = self.selections.newest::<usize>(cx).head();
 5129        let excerpt = snapshot.excerpt_containing(offset..offset)?;
 5130        let buffer_id = excerpt.buffer().remote_id();
 5131
 5132        let layer = excerpt.buffer().syntax_layer_at(offset)?;
 5133        let mut cursor = layer.node().walk();
 5134
 5135        while cursor.goto_first_child_for_byte(offset).is_some() {
 5136            if cursor.node().end_byte() == offset {
 5137                cursor.goto_next_sibling();
 5138            }
 5139        }
 5140
 5141        // Ascend to the smallest ancestor that contains the range and has a task.
 5142        loop {
 5143            let node = cursor.node();
 5144            let node_range = node.byte_range();
 5145            let symbol_start_row = excerpt.buffer().offset_to_point(node.start_byte()).row;
 5146
 5147            // Check if this node contains our offset
 5148            if node_range.start <= offset && node_range.end >= offset {
 5149                // If it contains offset, check for task
 5150                if let Some(tasks) = self.tasks.get(&(buffer_id, symbol_start_row)) {
 5151                    let buffer = self.buffer.read(cx).buffer(buffer_id)?;
 5152                    return Some((buffer, symbol_start_row, Arc::new(tasks.to_owned())));
 5153                }
 5154            }
 5155
 5156            if !cursor.goto_parent() {
 5157                break;
 5158            }
 5159        }
 5160        None
 5161    }
 5162
 5163    fn render_run_indicator(
 5164        &self,
 5165        _style: &EditorStyle,
 5166        is_active: bool,
 5167        row: DisplayRow,
 5168        cx: &mut ViewContext<Self>,
 5169    ) -> IconButton {
 5170        IconButton::new(("run_indicator", row.0 as usize), ui::IconName::Play)
 5171            .shape(ui::IconButtonShape::Square)
 5172            .icon_size(IconSize::XSmall)
 5173            .icon_color(Color::Muted)
 5174            .toggle_state(is_active)
 5175            .on_click(cx.listener(move |editor, _e, cx| {
 5176                editor.focus(cx);
 5177                editor.toggle_code_actions(
 5178                    &ToggleCodeActions {
 5179                        deployed_from_indicator: Some(row),
 5180                    },
 5181                    cx,
 5182                );
 5183            }))
 5184    }
 5185
 5186    #[cfg(any(feature = "test-support", test))]
 5187    pub fn context_menu_visible(&self) -> bool {
 5188        self.context_menu
 5189            .borrow()
 5190            .as_ref()
 5191            .map_or(false, |menu| menu.visible())
 5192    }
 5193
 5194    #[cfg(feature = "test-support")]
 5195    pub fn context_menu_contains_inline_completion(&self) -> bool {
 5196        self.context_menu
 5197            .borrow()
 5198            .as_ref()
 5199            .map_or(false, |menu| match menu {
 5200                CodeContextMenu::Completions(menu) => {
 5201                    menu.entries.borrow().first().map_or(false, |entry| {
 5202                        matches!(entry, CompletionEntry::InlineCompletionHint(_))
 5203                    })
 5204                }
 5205                CodeContextMenu::CodeActions(_) => false,
 5206            })
 5207    }
 5208
 5209    fn context_menu_origin(&self, cursor_position: DisplayPoint) -> Option<ContextMenuOrigin> {
 5210        self.context_menu
 5211            .borrow()
 5212            .as_ref()
 5213            .map(|menu| menu.origin(cursor_position))
 5214    }
 5215
 5216    fn render_context_menu(
 5217        &self,
 5218        style: &EditorStyle,
 5219        max_height_in_lines: u32,
 5220        cx: &mut ViewContext<Editor>,
 5221    ) -> Option<AnyElement> {
 5222        self.context_menu.borrow().as_ref().and_then(|menu| {
 5223            if menu.visible() {
 5224                Some(menu.render(style, max_height_in_lines, cx))
 5225            } else {
 5226                None
 5227            }
 5228        })
 5229    }
 5230
 5231    fn render_context_menu_aside(
 5232        &self,
 5233        style: &EditorStyle,
 5234        max_size: Size<Pixels>,
 5235        cx: &mut ViewContext<Editor>,
 5236    ) -> Option<AnyElement> {
 5237        self.context_menu.borrow().as_ref().and_then(|menu| {
 5238            if menu.visible() {
 5239                menu.render_aside(
 5240                    style,
 5241                    max_size,
 5242                    self.workspace.as_ref().map(|(w, _)| w.clone()),
 5243                    cx,
 5244                )
 5245            } else {
 5246                None
 5247            }
 5248        })
 5249    }
 5250
 5251    fn hide_context_menu(&mut self, cx: &mut ViewContext<Self>) -> Option<CodeContextMenu> {
 5252        cx.notify();
 5253        self.completion_tasks.clear();
 5254        let context_menu = self.context_menu.borrow_mut().take();
 5255        if context_menu.is_some() && !self.show_inline_completions_in_menu(cx) {
 5256            self.update_visible_inline_completion(cx);
 5257        }
 5258        context_menu
 5259    }
 5260
 5261    fn show_snippet_choices(
 5262        &mut self,
 5263        choices: &Vec<String>,
 5264        selection: Range<Anchor>,
 5265        cx: &mut ViewContext<Self>,
 5266    ) {
 5267        if selection.start.buffer_id.is_none() {
 5268            return;
 5269        }
 5270        let buffer_id = selection.start.buffer_id.unwrap();
 5271        let buffer = self.buffer().read(cx).buffer(buffer_id);
 5272        let id = post_inc(&mut self.next_completion_id);
 5273
 5274        if let Some(buffer) = buffer {
 5275            *self.context_menu.borrow_mut() = Some(CodeContextMenu::Completions(
 5276                CompletionsMenu::new_snippet_choices(id, true, choices, selection, buffer),
 5277            ));
 5278        }
 5279    }
 5280
 5281    pub fn insert_snippet(
 5282        &mut self,
 5283        insertion_ranges: &[Range<usize>],
 5284        snippet: Snippet,
 5285        cx: &mut ViewContext<Self>,
 5286    ) -> Result<()> {
 5287        struct Tabstop<T> {
 5288            is_end_tabstop: bool,
 5289            ranges: Vec<Range<T>>,
 5290            choices: Option<Vec<String>>,
 5291        }
 5292
 5293        let tabstops = self.buffer.update(cx, |buffer, cx| {
 5294            let snippet_text: Arc<str> = snippet.text.clone().into();
 5295            buffer.edit(
 5296                insertion_ranges
 5297                    .iter()
 5298                    .cloned()
 5299                    .map(|range| (range, snippet_text.clone())),
 5300                Some(AutoindentMode::EachLine),
 5301                cx,
 5302            );
 5303
 5304            let snapshot = &*buffer.read(cx);
 5305            let snippet = &snippet;
 5306            snippet
 5307                .tabstops
 5308                .iter()
 5309                .map(|tabstop| {
 5310                    let is_end_tabstop = tabstop.ranges.first().map_or(false, |tabstop| {
 5311                        tabstop.is_empty() && tabstop.start == snippet.text.len() as isize
 5312                    });
 5313                    let mut tabstop_ranges = tabstop
 5314                        .ranges
 5315                        .iter()
 5316                        .flat_map(|tabstop_range| {
 5317                            let mut delta = 0_isize;
 5318                            insertion_ranges.iter().map(move |insertion_range| {
 5319                                let insertion_start = insertion_range.start as isize + delta;
 5320                                delta +=
 5321                                    snippet.text.len() as isize - insertion_range.len() as isize;
 5322
 5323                                let start = ((insertion_start + tabstop_range.start) as usize)
 5324                                    .min(snapshot.len());
 5325                                let end = ((insertion_start + tabstop_range.end) as usize)
 5326                                    .min(snapshot.len());
 5327                                snapshot.anchor_before(start)..snapshot.anchor_after(end)
 5328                            })
 5329                        })
 5330                        .collect::<Vec<_>>();
 5331                    tabstop_ranges.sort_unstable_by(|a, b| a.start.cmp(&b.start, snapshot));
 5332
 5333                    Tabstop {
 5334                        is_end_tabstop,
 5335                        ranges: tabstop_ranges,
 5336                        choices: tabstop.choices.clone(),
 5337                    }
 5338                })
 5339                .collect::<Vec<_>>()
 5340        });
 5341        if let Some(tabstop) = tabstops.first() {
 5342            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 5343                s.select_ranges(tabstop.ranges.iter().cloned());
 5344            });
 5345
 5346            if let Some(choices) = &tabstop.choices {
 5347                if let Some(selection) = tabstop.ranges.first() {
 5348                    self.show_snippet_choices(choices, selection.clone(), cx)
 5349                }
 5350            }
 5351
 5352            // If we're already at the last tabstop and it's at the end of the snippet,
 5353            // we're done, we don't need to keep the state around.
 5354            if !tabstop.is_end_tabstop {
 5355                let choices = tabstops
 5356                    .iter()
 5357                    .map(|tabstop| tabstop.choices.clone())
 5358                    .collect();
 5359
 5360                let ranges = tabstops
 5361                    .into_iter()
 5362                    .map(|tabstop| tabstop.ranges)
 5363                    .collect::<Vec<_>>();
 5364
 5365                self.snippet_stack.push(SnippetState {
 5366                    active_index: 0,
 5367                    ranges,
 5368                    choices,
 5369                });
 5370            }
 5371
 5372            // Check whether the just-entered snippet ends with an auto-closable bracket.
 5373            if self.autoclose_regions.is_empty() {
 5374                let snapshot = self.buffer.read(cx).snapshot(cx);
 5375                for selection in &mut self.selections.all::<Point>(cx) {
 5376                    let selection_head = selection.head();
 5377                    let Some(scope) = snapshot.language_scope_at(selection_head) else {
 5378                        continue;
 5379                    };
 5380
 5381                    let mut bracket_pair = None;
 5382                    let next_chars = snapshot.chars_at(selection_head).collect::<String>();
 5383                    let prev_chars = snapshot
 5384                        .reversed_chars_at(selection_head)
 5385                        .collect::<String>();
 5386                    for (pair, enabled) in scope.brackets() {
 5387                        if enabled
 5388                            && pair.close
 5389                            && prev_chars.starts_with(pair.start.as_str())
 5390                            && next_chars.starts_with(pair.end.as_str())
 5391                        {
 5392                            bracket_pair = Some(pair.clone());
 5393                            break;
 5394                        }
 5395                    }
 5396                    if let Some(pair) = bracket_pair {
 5397                        let start = snapshot.anchor_after(selection_head);
 5398                        let end = snapshot.anchor_after(selection_head);
 5399                        self.autoclose_regions.push(AutocloseRegion {
 5400                            selection_id: selection.id,
 5401                            range: start..end,
 5402                            pair,
 5403                        });
 5404                    }
 5405                }
 5406            }
 5407        }
 5408        Ok(())
 5409    }
 5410
 5411    pub fn move_to_next_snippet_tabstop(&mut self, cx: &mut ViewContext<Self>) -> bool {
 5412        self.move_to_snippet_tabstop(Bias::Right, cx)
 5413    }
 5414
 5415    pub fn move_to_prev_snippet_tabstop(&mut self, cx: &mut ViewContext<Self>) -> bool {
 5416        self.move_to_snippet_tabstop(Bias::Left, cx)
 5417    }
 5418
 5419    pub fn move_to_snippet_tabstop(&mut self, bias: Bias, cx: &mut ViewContext<Self>) -> bool {
 5420        if let Some(mut snippet) = self.snippet_stack.pop() {
 5421            match bias {
 5422                Bias::Left => {
 5423                    if snippet.active_index > 0 {
 5424                        snippet.active_index -= 1;
 5425                    } else {
 5426                        self.snippet_stack.push(snippet);
 5427                        return false;
 5428                    }
 5429                }
 5430                Bias::Right => {
 5431                    if snippet.active_index + 1 < snippet.ranges.len() {
 5432                        snippet.active_index += 1;
 5433                    } else {
 5434                        self.snippet_stack.push(snippet);
 5435                        return false;
 5436                    }
 5437                }
 5438            }
 5439            if let Some(current_ranges) = snippet.ranges.get(snippet.active_index) {
 5440                self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 5441                    s.select_anchor_ranges(current_ranges.iter().cloned())
 5442                });
 5443
 5444                if let Some(choices) = &snippet.choices[snippet.active_index] {
 5445                    if let Some(selection) = current_ranges.first() {
 5446                        self.show_snippet_choices(&choices, selection.clone(), cx);
 5447                    }
 5448                }
 5449
 5450                // If snippet state is not at the last tabstop, push it back on the stack
 5451                if snippet.active_index + 1 < snippet.ranges.len() {
 5452                    self.snippet_stack.push(snippet);
 5453                }
 5454                return true;
 5455            }
 5456        }
 5457
 5458        false
 5459    }
 5460
 5461    pub fn clear(&mut self, cx: &mut ViewContext<Self>) {
 5462        self.transact(cx, |this, cx| {
 5463            this.select_all(&SelectAll, cx);
 5464            this.insert("", cx);
 5465        });
 5466    }
 5467
 5468    pub fn backspace(&mut self, _: &Backspace, cx: &mut ViewContext<Self>) {
 5469        self.transact(cx, |this, cx| {
 5470            this.select_autoclose_pair(cx);
 5471            let mut linked_ranges = HashMap::<_, Vec<_>>::default();
 5472            if !this.linked_edit_ranges.is_empty() {
 5473                let selections = this.selections.all::<MultiBufferPoint>(cx);
 5474                let snapshot = this.buffer.read(cx).snapshot(cx);
 5475
 5476                for selection in selections.iter() {
 5477                    let selection_start = snapshot.anchor_before(selection.start).text_anchor;
 5478                    let selection_end = snapshot.anchor_after(selection.end).text_anchor;
 5479                    if selection_start.buffer_id != selection_end.buffer_id {
 5480                        continue;
 5481                    }
 5482                    if let Some(ranges) =
 5483                        this.linked_editing_ranges_for(selection_start..selection_end, cx)
 5484                    {
 5485                        for (buffer, entries) in ranges {
 5486                            linked_ranges.entry(buffer).or_default().extend(entries);
 5487                        }
 5488                    }
 5489                }
 5490            }
 5491
 5492            let mut selections = this.selections.all::<MultiBufferPoint>(cx);
 5493            if !this.selections.line_mode {
 5494                let display_map = this.display_map.update(cx, |map, cx| map.snapshot(cx));
 5495                for selection in &mut selections {
 5496                    if selection.is_empty() {
 5497                        let old_head = selection.head();
 5498                        let mut new_head =
 5499                            movement::left(&display_map, old_head.to_display_point(&display_map))
 5500                                .to_point(&display_map);
 5501                        if let Some((buffer, line_buffer_range)) = display_map
 5502                            .buffer_snapshot
 5503                            .buffer_line_for_row(MultiBufferRow(old_head.row))
 5504                        {
 5505                            let indent_size =
 5506                                buffer.indent_size_for_line(line_buffer_range.start.row);
 5507                            let indent_len = match indent_size.kind {
 5508                                IndentKind::Space => {
 5509                                    buffer.settings_at(line_buffer_range.start, cx).tab_size
 5510                                }
 5511                                IndentKind::Tab => NonZeroU32::new(1).unwrap(),
 5512                            };
 5513                            if old_head.column <= indent_size.len && old_head.column > 0 {
 5514                                let indent_len = indent_len.get();
 5515                                new_head = cmp::min(
 5516                                    new_head,
 5517                                    MultiBufferPoint::new(
 5518                                        old_head.row,
 5519                                        ((old_head.column - 1) / indent_len) * indent_len,
 5520                                    ),
 5521                                );
 5522                            }
 5523                        }
 5524
 5525                        selection.set_head(new_head, SelectionGoal::None);
 5526                    }
 5527                }
 5528            }
 5529
 5530            this.signature_help_state.set_backspace_pressed(true);
 5531            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 5532            this.insert("", cx);
 5533            let empty_str: Arc<str> = Arc::from("");
 5534            for (buffer, edits) in linked_ranges {
 5535                let snapshot = buffer.read(cx).snapshot();
 5536                use text::ToPoint as TP;
 5537
 5538                let edits = edits
 5539                    .into_iter()
 5540                    .map(|range| {
 5541                        let end_point = TP::to_point(&range.end, &snapshot);
 5542                        let mut start_point = TP::to_point(&range.start, &snapshot);
 5543
 5544                        if end_point == start_point {
 5545                            let offset = text::ToOffset::to_offset(&range.start, &snapshot)
 5546                                .saturating_sub(1);
 5547                            start_point =
 5548                                snapshot.clip_point(TP::to_point(&offset, &snapshot), Bias::Left);
 5549                        };
 5550
 5551                        (start_point..end_point, empty_str.clone())
 5552                    })
 5553                    .sorted_by_key(|(range, _)| range.start)
 5554                    .collect::<Vec<_>>();
 5555                buffer.update(cx, |this, cx| {
 5556                    this.edit(edits, None, cx);
 5557                })
 5558            }
 5559            this.refresh_inline_completion(true, false, cx);
 5560            linked_editing_ranges::refresh_linked_ranges(this, cx);
 5561        });
 5562    }
 5563
 5564    pub fn delete(&mut self, _: &Delete, cx: &mut ViewContext<Self>) {
 5565        self.transact(cx, |this, cx| {
 5566            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 5567                let line_mode = s.line_mode;
 5568                s.move_with(|map, selection| {
 5569                    if selection.is_empty() && !line_mode {
 5570                        let cursor = movement::right(map, selection.head());
 5571                        selection.end = cursor;
 5572                        selection.reversed = true;
 5573                        selection.goal = SelectionGoal::None;
 5574                    }
 5575                })
 5576            });
 5577            this.insert("", cx);
 5578            this.refresh_inline_completion(true, false, cx);
 5579        });
 5580    }
 5581
 5582    pub fn tab_prev(&mut self, _: &TabPrev, cx: &mut ViewContext<Self>) {
 5583        if self.move_to_prev_snippet_tabstop(cx) {
 5584            return;
 5585        }
 5586
 5587        self.outdent(&Outdent, cx);
 5588    }
 5589
 5590    pub fn tab(&mut self, _: &Tab, cx: &mut ViewContext<Self>) {
 5591        if self.move_to_next_snippet_tabstop(cx) || self.read_only(cx) {
 5592            return;
 5593        }
 5594
 5595        let mut selections = self.selections.all_adjusted(cx);
 5596        let buffer = self.buffer.read(cx);
 5597        let snapshot = buffer.snapshot(cx);
 5598        let rows_iter = selections.iter().map(|s| s.head().row);
 5599        let suggested_indents = snapshot.suggested_indents(rows_iter, cx);
 5600
 5601        let mut edits = Vec::new();
 5602        let mut prev_edited_row = 0;
 5603        let mut row_delta = 0;
 5604        for selection in &mut selections {
 5605            if selection.start.row != prev_edited_row {
 5606                row_delta = 0;
 5607            }
 5608            prev_edited_row = selection.end.row;
 5609
 5610            // If the selection is non-empty, then increase the indentation of the selected lines.
 5611            if !selection.is_empty() {
 5612                row_delta =
 5613                    Self::indent_selection(buffer, &snapshot, selection, &mut edits, row_delta, cx);
 5614                continue;
 5615            }
 5616
 5617            // If the selection is empty and the cursor is in the leading whitespace before the
 5618            // suggested indentation, then auto-indent the line.
 5619            let cursor = selection.head();
 5620            let current_indent = snapshot.indent_size_for_line(MultiBufferRow(cursor.row));
 5621            if let Some(suggested_indent) =
 5622                suggested_indents.get(&MultiBufferRow(cursor.row)).copied()
 5623            {
 5624                if cursor.column < suggested_indent.len
 5625                    && cursor.column <= current_indent.len
 5626                    && current_indent.len <= suggested_indent.len
 5627                {
 5628                    selection.start = Point::new(cursor.row, suggested_indent.len);
 5629                    selection.end = selection.start;
 5630                    if row_delta == 0 {
 5631                        edits.extend(Buffer::edit_for_indent_size_adjustment(
 5632                            cursor.row,
 5633                            current_indent,
 5634                            suggested_indent,
 5635                        ));
 5636                        row_delta = suggested_indent.len - current_indent.len;
 5637                    }
 5638                    continue;
 5639                }
 5640            }
 5641
 5642            // Otherwise, insert a hard or soft tab.
 5643            let settings = buffer.settings_at(cursor, cx);
 5644            let tab_size = if settings.hard_tabs {
 5645                IndentSize::tab()
 5646            } else {
 5647                let tab_size = settings.tab_size.get();
 5648                let char_column = snapshot
 5649                    .text_for_range(Point::new(cursor.row, 0)..cursor)
 5650                    .flat_map(str::chars)
 5651                    .count()
 5652                    + row_delta as usize;
 5653                let chars_to_next_tab_stop = tab_size - (char_column as u32 % tab_size);
 5654                IndentSize::spaces(chars_to_next_tab_stop)
 5655            };
 5656            selection.start = Point::new(cursor.row, cursor.column + row_delta + tab_size.len);
 5657            selection.end = selection.start;
 5658            edits.push((cursor..cursor, tab_size.chars().collect::<String>()));
 5659            row_delta += tab_size.len;
 5660        }
 5661
 5662        self.transact(cx, |this, cx| {
 5663            this.buffer.update(cx, |b, cx| b.edit(edits, None, cx));
 5664            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 5665            this.refresh_inline_completion(true, false, cx);
 5666        });
 5667    }
 5668
 5669    pub fn indent(&mut self, _: &Indent, cx: &mut ViewContext<Self>) {
 5670        if self.read_only(cx) {
 5671            return;
 5672        }
 5673        let mut selections = self.selections.all::<Point>(cx);
 5674        let mut prev_edited_row = 0;
 5675        let mut row_delta = 0;
 5676        let mut edits = Vec::new();
 5677        let buffer = self.buffer.read(cx);
 5678        let snapshot = buffer.snapshot(cx);
 5679        for selection in &mut selections {
 5680            if selection.start.row != prev_edited_row {
 5681                row_delta = 0;
 5682            }
 5683            prev_edited_row = selection.end.row;
 5684
 5685            row_delta =
 5686                Self::indent_selection(buffer, &snapshot, selection, &mut edits, row_delta, cx);
 5687        }
 5688
 5689        self.transact(cx, |this, cx| {
 5690            this.buffer.update(cx, |b, cx| b.edit(edits, None, cx));
 5691            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 5692        });
 5693    }
 5694
 5695    fn indent_selection(
 5696        buffer: &MultiBuffer,
 5697        snapshot: &MultiBufferSnapshot,
 5698        selection: &mut Selection<Point>,
 5699        edits: &mut Vec<(Range<Point>, String)>,
 5700        delta_for_start_row: u32,
 5701        cx: &AppContext,
 5702    ) -> u32 {
 5703        let settings = buffer.settings_at(selection.start, cx);
 5704        let tab_size = settings.tab_size.get();
 5705        let indent_kind = if settings.hard_tabs {
 5706            IndentKind::Tab
 5707        } else {
 5708            IndentKind::Space
 5709        };
 5710        let mut start_row = selection.start.row;
 5711        let mut end_row = selection.end.row + 1;
 5712
 5713        // If a selection ends at the beginning of a line, don't indent
 5714        // that last line.
 5715        if selection.end.column == 0 && selection.end.row > selection.start.row {
 5716            end_row -= 1;
 5717        }
 5718
 5719        // Avoid re-indenting a row that has already been indented by a
 5720        // previous selection, but still update this selection's column
 5721        // to reflect that indentation.
 5722        if delta_for_start_row > 0 {
 5723            start_row += 1;
 5724            selection.start.column += delta_for_start_row;
 5725            if selection.end.row == selection.start.row {
 5726                selection.end.column += delta_for_start_row;
 5727            }
 5728        }
 5729
 5730        let mut delta_for_end_row = 0;
 5731        let has_multiple_rows = start_row + 1 != end_row;
 5732        for row in start_row..end_row {
 5733            let current_indent = snapshot.indent_size_for_line(MultiBufferRow(row));
 5734            let indent_delta = match (current_indent.kind, indent_kind) {
 5735                (IndentKind::Space, IndentKind::Space) => {
 5736                    let columns_to_next_tab_stop = tab_size - (current_indent.len % tab_size);
 5737                    IndentSize::spaces(columns_to_next_tab_stop)
 5738                }
 5739                (IndentKind::Tab, IndentKind::Space) => IndentSize::spaces(tab_size),
 5740                (_, IndentKind::Tab) => IndentSize::tab(),
 5741            };
 5742
 5743            let start = if has_multiple_rows || current_indent.len < selection.start.column {
 5744                0
 5745            } else {
 5746                selection.start.column
 5747            };
 5748            let row_start = Point::new(row, start);
 5749            edits.push((
 5750                row_start..row_start,
 5751                indent_delta.chars().collect::<String>(),
 5752            ));
 5753
 5754            // Update this selection's endpoints to reflect the indentation.
 5755            if row == selection.start.row {
 5756                selection.start.column += indent_delta.len;
 5757            }
 5758            if row == selection.end.row {
 5759                selection.end.column += indent_delta.len;
 5760                delta_for_end_row = indent_delta.len;
 5761            }
 5762        }
 5763
 5764        if selection.start.row == selection.end.row {
 5765            delta_for_start_row + delta_for_end_row
 5766        } else {
 5767            delta_for_end_row
 5768        }
 5769    }
 5770
 5771    pub fn outdent(&mut self, _: &Outdent, cx: &mut ViewContext<Self>) {
 5772        if self.read_only(cx) {
 5773            return;
 5774        }
 5775        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 5776        let selections = self.selections.all::<Point>(cx);
 5777        let mut deletion_ranges = Vec::new();
 5778        let mut last_outdent = None;
 5779        {
 5780            let buffer = self.buffer.read(cx);
 5781            let snapshot = buffer.snapshot(cx);
 5782            for selection in &selections {
 5783                let settings = buffer.settings_at(selection.start, cx);
 5784                let tab_size = settings.tab_size.get();
 5785                let mut rows = selection.spanned_rows(false, &display_map);
 5786
 5787                // Avoid re-outdenting a row that has already been outdented by a
 5788                // previous selection.
 5789                if let Some(last_row) = last_outdent {
 5790                    if last_row == rows.start {
 5791                        rows.start = rows.start.next_row();
 5792                    }
 5793                }
 5794                let has_multiple_rows = rows.len() > 1;
 5795                for row in rows.iter_rows() {
 5796                    let indent_size = snapshot.indent_size_for_line(row);
 5797                    if indent_size.len > 0 {
 5798                        let deletion_len = match indent_size.kind {
 5799                            IndentKind::Space => {
 5800                                let columns_to_prev_tab_stop = indent_size.len % tab_size;
 5801                                if columns_to_prev_tab_stop == 0 {
 5802                                    tab_size
 5803                                } else {
 5804                                    columns_to_prev_tab_stop
 5805                                }
 5806                            }
 5807                            IndentKind::Tab => 1,
 5808                        };
 5809                        let start = if has_multiple_rows
 5810                            || deletion_len > selection.start.column
 5811                            || indent_size.len < selection.start.column
 5812                        {
 5813                            0
 5814                        } else {
 5815                            selection.start.column - deletion_len
 5816                        };
 5817                        deletion_ranges.push(
 5818                            Point::new(row.0, start)..Point::new(row.0, start + deletion_len),
 5819                        );
 5820                        last_outdent = Some(row);
 5821                    }
 5822                }
 5823            }
 5824        }
 5825
 5826        self.transact(cx, |this, cx| {
 5827            this.buffer.update(cx, |buffer, cx| {
 5828                let empty_str: Arc<str> = Arc::default();
 5829                buffer.edit(
 5830                    deletion_ranges
 5831                        .into_iter()
 5832                        .map(|range| (range, empty_str.clone())),
 5833                    None,
 5834                    cx,
 5835                );
 5836            });
 5837            let selections = this.selections.all::<usize>(cx);
 5838            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 5839        });
 5840    }
 5841
 5842    pub fn autoindent(&mut self, _: &AutoIndent, cx: &mut ViewContext<Self>) {
 5843        if self.read_only(cx) {
 5844            return;
 5845        }
 5846        let selections = self
 5847            .selections
 5848            .all::<usize>(cx)
 5849            .into_iter()
 5850            .map(|s| s.range());
 5851
 5852        self.transact(cx, |this, cx| {
 5853            this.buffer.update(cx, |buffer, cx| {
 5854                buffer.autoindent_ranges(selections, cx);
 5855            });
 5856            let selections = this.selections.all::<usize>(cx);
 5857            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 5858        });
 5859    }
 5860
 5861    pub fn delete_line(&mut self, _: &DeleteLine, cx: &mut ViewContext<Self>) {
 5862        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 5863        let selections = self.selections.all::<Point>(cx);
 5864
 5865        let mut new_cursors = Vec::new();
 5866        let mut edit_ranges = Vec::new();
 5867        let mut selections = selections.iter().peekable();
 5868        while let Some(selection) = selections.next() {
 5869            let mut rows = selection.spanned_rows(false, &display_map);
 5870            let goal_display_column = selection.head().to_display_point(&display_map).column();
 5871
 5872            // Accumulate contiguous regions of rows that we want to delete.
 5873            while let Some(next_selection) = selections.peek() {
 5874                let next_rows = next_selection.spanned_rows(false, &display_map);
 5875                if next_rows.start <= rows.end {
 5876                    rows.end = next_rows.end;
 5877                    selections.next().unwrap();
 5878                } else {
 5879                    break;
 5880                }
 5881            }
 5882
 5883            let buffer = &display_map.buffer_snapshot;
 5884            let mut edit_start = Point::new(rows.start.0, 0).to_offset(buffer);
 5885            let edit_end;
 5886            let cursor_buffer_row;
 5887            if buffer.max_point().row >= rows.end.0 {
 5888                // If there's a line after the range, delete the \n from the end of the row range
 5889                // and position the cursor on the next line.
 5890                edit_end = Point::new(rows.end.0, 0).to_offset(buffer);
 5891                cursor_buffer_row = rows.end;
 5892            } else {
 5893                // If there isn't a line after the range, delete the \n from the line before the
 5894                // start of the row range and position the cursor there.
 5895                edit_start = edit_start.saturating_sub(1);
 5896                edit_end = buffer.len();
 5897                cursor_buffer_row = rows.start.previous_row();
 5898            }
 5899
 5900            let mut cursor = Point::new(cursor_buffer_row.0, 0).to_display_point(&display_map);
 5901            *cursor.column_mut() =
 5902                cmp::min(goal_display_column, display_map.line_len(cursor.row()));
 5903
 5904            new_cursors.push((
 5905                selection.id,
 5906                buffer.anchor_after(cursor.to_point(&display_map)),
 5907            ));
 5908            edit_ranges.push(edit_start..edit_end);
 5909        }
 5910
 5911        self.transact(cx, |this, cx| {
 5912            let buffer = this.buffer.update(cx, |buffer, cx| {
 5913                let empty_str: Arc<str> = Arc::default();
 5914                buffer.edit(
 5915                    edit_ranges
 5916                        .into_iter()
 5917                        .map(|range| (range, empty_str.clone())),
 5918                    None,
 5919                    cx,
 5920                );
 5921                buffer.snapshot(cx)
 5922            });
 5923            let new_selections = new_cursors
 5924                .into_iter()
 5925                .map(|(id, cursor)| {
 5926                    let cursor = cursor.to_point(&buffer);
 5927                    Selection {
 5928                        id,
 5929                        start: cursor,
 5930                        end: cursor,
 5931                        reversed: false,
 5932                        goal: SelectionGoal::None,
 5933                    }
 5934                })
 5935                .collect();
 5936
 5937            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 5938                s.select(new_selections);
 5939            });
 5940        });
 5941    }
 5942
 5943    pub fn join_lines_impl(&mut self, insert_whitespace: bool, cx: &mut ViewContext<Self>) {
 5944        if self.read_only(cx) {
 5945            return;
 5946        }
 5947        let mut row_ranges = Vec::<Range<MultiBufferRow>>::new();
 5948        for selection in self.selections.all::<Point>(cx) {
 5949            let start = MultiBufferRow(selection.start.row);
 5950            // Treat single line selections as if they include the next line. Otherwise this action
 5951            // would do nothing for single line selections individual cursors.
 5952            let end = if selection.start.row == selection.end.row {
 5953                MultiBufferRow(selection.start.row + 1)
 5954            } else {
 5955                MultiBufferRow(selection.end.row)
 5956            };
 5957
 5958            if let Some(last_row_range) = row_ranges.last_mut() {
 5959                if start <= last_row_range.end {
 5960                    last_row_range.end = end;
 5961                    continue;
 5962                }
 5963            }
 5964            row_ranges.push(start..end);
 5965        }
 5966
 5967        let snapshot = self.buffer.read(cx).snapshot(cx);
 5968        let mut cursor_positions = Vec::new();
 5969        for row_range in &row_ranges {
 5970            let anchor = snapshot.anchor_before(Point::new(
 5971                row_range.end.previous_row().0,
 5972                snapshot.line_len(row_range.end.previous_row()),
 5973            ));
 5974            cursor_positions.push(anchor..anchor);
 5975        }
 5976
 5977        self.transact(cx, |this, cx| {
 5978            for row_range in row_ranges.into_iter().rev() {
 5979                for row in row_range.iter_rows().rev() {
 5980                    let end_of_line = Point::new(row.0, snapshot.line_len(row));
 5981                    let next_line_row = row.next_row();
 5982                    let indent = snapshot.indent_size_for_line(next_line_row);
 5983                    let start_of_next_line = Point::new(next_line_row.0, indent.len);
 5984
 5985                    let replace =
 5986                        if snapshot.line_len(next_line_row) > indent.len && insert_whitespace {
 5987                            " "
 5988                        } else {
 5989                            ""
 5990                        };
 5991
 5992                    this.buffer.update(cx, |buffer, cx| {
 5993                        buffer.edit([(end_of_line..start_of_next_line, replace)], None, cx)
 5994                    });
 5995                }
 5996            }
 5997
 5998            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 5999                s.select_anchor_ranges(cursor_positions)
 6000            });
 6001        });
 6002    }
 6003
 6004    pub fn join_lines(&mut self, _: &JoinLines, cx: &mut ViewContext<Self>) {
 6005        self.join_lines_impl(true, cx);
 6006    }
 6007
 6008    pub fn sort_lines_case_sensitive(
 6009        &mut self,
 6010        _: &SortLinesCaseSensitive,
 6011        cx: &mut ViewContext<Self>,
 6012    ) {
 6013        self.manipulate_lines(cx, |lines| lines.sort())
 6014    }
 6015
 6016    pub fn sort_lines_case_insensitive(
 6017        &mut self,
 6018        _: &SortLinesCaseInsensitive,
 6019        cx: &mut ViewContext<Self>,
 6020    ) {
 6021        self.manipulate_lines(cx, |lines| lines.sort_by_key(|line| line.to_lowercase()))
 6022    }
 6023
 6024    pub fn unique_lines_case_insensitive(
 6025        &mut self,
 6026        _: &UniqueLinesCaseInsensitive,
 6027        cx: &mut ViewContext<Self>,
 6028    ) {
 6029        self.manipulate_lines(cx, |lines| {
 6030            let mut seen = HashSet::default();
 6031            lines.retain(|line| seen.insert(line.to_lowercase()));
 6032        })
 6033    }
 6034
 6035    pub fn unique_lines_case_sensitive(
 6036        &mut self,
 6037        _: &UniqueLinesCaseSensitive,
 6038        cx: &mut ViewContext<Self>,
 6039    ) {
 6040        self.manipulate_lines(cx, |lines| {
 6041            let mut seen = HashSet::default();
 6042            lines.retain(|line| seen.insert(*line));
 6043        })
 6044    }
 6045
 6046    pub fn revert_file(&mut self, _: &RevertFile, cx: &mut ViewContext<Self>) {
 6047        let mut revert_changes = HashMap::default();
 6048        let snapshot = self.snapshot(cx);
 6049        for hunk in hunks_for_ranges(
 6050            Some(Point::zero()..snapshot.buffer_snapshot.max_point()).into_iter(),
 6051            &snapshot,
 6052        ) {
 6053            self.prepare_revert_change(&mut revert_changes, &hunk, cx);
 6054        }
 6055        if !revert_changes.is_empty() {
 6056            self.transact(cx, |editor, cx| {
 6057                editor.revert(revert_changes, cx);
 6058            });
 6059        }
 6060    }
 6061
 6062    pub fn reload_file(&mut self, _: &ReloadFile, cx: &mut ViewContext<Self>) {
 6063        let Some(project) = self.project.clone() else {
 6064            return;
 6065        };
 6066        self.reload(project, cx).detach_and_notify_err(cx);
 6067    }
 6068
 6069    pub fn revert_selected_hunks(&mut self, _: &RevertSelectedHunks, cx: &mut ViewContext<Self>) {
 6070        let revert_changes = self.gather_revert_changes(&self.selections.all(cx), cx);
 6071        if !revert_changes.is_empty() {
 6072            self.transact(cx, |editor, cx| {
 6073                editor.revert(revert_changes, cx);
 6074            });
 6075        }
 6076    }
 6077
 6078    fn revert_hunk(&mut self, hunk: HoveredHunk, cx: &mut ViewContext<Editor>) {
 6079        let snapshot = self.buffer.read(cx).read(cx);
 6080        if let Some(hunk) = crate::hunk_diff::to_diff_hunk(&hunk, &snapshot) {
 6081            drop(snapshot);
 6082            let mut revert_changes = HashMap::default();
 6083            self.prepare_revert_change(&mut revert_changes, &hunk, cx);
 6084            if !revert_changes.is_empty() {
 6085                self.revert(revert_changes, cx)
 6086            }
 6087        }
 6088    }
 6089
 6090    pub fn open_active_item_in_terminal(&mut self, _: &OpenInTerminal, cx: &mut ViewContext<Self>) {
 6091        if let Some(working_directory) = self.active_excerpt(cx).and_then(|(_, buffer, _)| {
 6092            let project_path = buffer.read(cx).project_path(cx)?;
 6093            let project = self.project.as_ref()?.read(cx);
 6094            let entry = project.entry_for_path(&project_path, cx)?;
 6095            let parent = match &entry.canonical_path {
 6096                Some(canonical_path) => canonical_path.to_path_buf(),
 6097                None => project.absolute_path(&project_path, cx)?,
 6098            }
 6099            .parent()?
 6100            .to_path_buf();
 6101            Some(parent)
 6102        }) {
 6103            cx.dispatch_action(OpenTerminal { working_directory }.boxed_clone());
 6104        }
 6105    }
 6106
 6107    fn gather_revert_changes(
 6108        &mut self,
 6109        selections: &[Selection<Point>],
 6110        cx: &mut ViewContext<Editor>,
 6111    ) -> HashMap<BufferId, Vec<(Range<text::Anchor>, Rope)>> {
 6112        let mut revert_changes = HashMap::default();
 6113        let snapshot = self.snapshot(cx);
 6114        for hunk in hunks_for_selections(&snapshot, selections) {
 6115            self.prepare_revert_change(&mut revert_changes, &hunk, cx);
 6116        }
 6117        revert_changes
 6118    }
 6119
 6120    pub fn prepare_revert_change(
 6121        &mut self,
 6122        revert_changes: &mut HashMap<BufferId, Vec<(Range<text::Anchor>, Rope)>>,
 6123        hunk: &MultiBufferDiffHunk,
 6124        cx: &AppContext,
 6125    ) -> Option<()> {
 6126        let buffer = self.buffer.read(cx).buffer(hunk.buffer_id)?;
 6127        let buffer = buffer.read(cx);
 6128        let change_set = &self.diff_map.diff_bases.get(&hunk.buffer_id)?.change_set;
 6129        let original_text = change_set
 6130            .read(cx)
 6131            .base_text
 6132            .as_ref()?
 6133            .read(cx)
 6134            .as_rope()
 6135            .slice(hunk.diff_base_byte_range.clone());
 6136        let buffer_snapshot = buffer.snapshot();
 6137        let buffer_revert_changes = revert_changes.entry(buffer.remote_id()).or_default();
 6138        if let Err(i) = buffer_revert_changes.binary_search_by(|probe| {
 6139            probe
 6140                .0
 6141                .start
 6142                .cmp(&hunk.buffer_range.start, &buffer_snapshot)
 6143                .then(probe.0.end.cmp(&hunk.buffer_range.end, &buffer_snapshot))
 6144        }) {
 6145            buffer_revert_changes.insert(i, (hunk.buffer_range.clone(), original_text));
 6146            Some(())
 6147        } else {
 6148            None
 6149        }
 6150    }
 6151
 6152    pub fn reverse_lines(&mut self, _: &ReverseLines, cx: &mut ViewContext<Self>) {
 6153        self.manipulate_lines(cx, |lines| lines.reverse())
 6154    }
 6155
 6156    pub fn shuffle_lines(&mut self, _: &ShuffleLines, cx: &mut ViewContext<Self>) {
 6157        self.manipulate_lines(cx, |lines| lines.shuffle(&mut thread_rng()))
 6158    }
 6159
 6160    fn manipulate_lines<Fn>(&mut self, cx: &mut ViewContext<Self>, mut callback: Fn)
 6161    where
 6162        Fn: FnMut(&mut Vec<&str>),
 6163    {
 6164        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6165        let buffer = self.buffer.read(cx).snapshot(cx);
 6166
 6167        let mut edits = Vec::new();
 6168
 6169        let selections = self.selections.all::<Point>(cx);
 6170        let mut selections = selections.iter().peekable();
 6171        let mut contiguous_row_selections = Vec::new();
 6172        let mut new_selections = Vec::new();
 6173        let mut added_lines = 0;
 6174        let mut removed_lines = 0;
 6175
 6176        while let Some(selection) = selections.next() {
 6177            let (start_row, end_row) = consume_contiguous_rows(
 6178                &mut contiguous_row_selections,
 6179                selection,
 6180                &display_map,
 6181                &mut selections,
 6182            );
 6183
 6184            let start_point = Point::new(start_row.0, 0);
 6185            let end_point = Point::new(
 6186                end_row.previous_row().0,
 6187                buffer.line_len(end_row.previous_row()),
 6188            );
 6189            let text = buffer
 6190                .text_for_range(start_point..end_point)
 6191                .collect::<String>();
 6192
 6193            let mut lines = text.split('\n').collect_vec();
 6194
 6195            let lines_before = lines.len();
 6196            callback(&mut lines);
 6197            let lines_after = lines.len();
 6198
 6199            edits.push((start_point..end_point, lines.join("\n")));
 6200
 6201            // Selections must change based on added and removed line count
 6202            let start_row =
 6203                MultiBufferRow(start_point.row + added_lines as u32 - removed_lines as u32);
 6204            let end_row = MultiBufferRow(start_row.0 + lines_after.saturating_sub(1) as u32);
 6205            new_selections.push(Selection {
 6206                id: selection.id,
 6207                start: start_row,
 6208                end: end_row,
 6209                goal: SelectionGoal::None,
 6210                reversed: selection.reversed,
 6211            });
 6212
 6213            if lines_after > lines_before {
 6214                added_lines += lines_after - lines_before;
 6215            } else if lines_before > lines_after {
 6216                removed_lines += lines_before - lines_after;
 6217            }
 6218        }
 6219
 6220        self.transact(cx, |this, cx| {
 6221            let buffer = this.buffer.update(cx, |buffer, cx| {
 6222                buffer.edit(edits, None, cx);
 6223                buffer.snapshot(cx)
 6224            });
 6225
 6226            // Recalculate offsets on newly edited buffer
 6227            let new_selections = new_selections
 6228                .iter()
 6229                .map(|s| {
 6230                    let start_point = Point::new(s.start.0, 0);
 6231                    let end_point = Point::new(s.end.0, buffer.line_len(s.end));
 6232                    Selection {
 6233                        id: s.id,
 6234                        start: buffer.point_to_offset(start_point),
 6235                        end: buffer.point_to_offset(end_point),
 6236                        goal: s.goal,
 6237                        reversed: s.reversed,
 6238                    }
 6239                })
 6240                .collect();
 6241
 6242            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6243                s.select(new_selections);
 6244            });
 6245
 6246            this.request_autoscroll(Autoscroll::fit(), cx);
 6247        });
 6248    }
 6249
 6250    pub fn convert_to_upper_case(&mut self, _: &ConvertToUpperCase, cx: &mut ViewContext<Self>) {
 6251        self.manipulate_text(cx, |text| text.to_uppercase())
 6252    }
 6253
 6254    pub fn convert_to_lower_case(&mut self, _: &ConvertToLowerCase, cx: &mut ViewContext<Self>) {
 6255        self.manipulate_text(cx, |text| text.to_lowercase())
 6256    }
 6257
 6258    pub fn convert_to_title_case(&mut self, _: &ConvertToTitleCase, cx: &mut ViewContext<Self>) {
 6259        self.manipulate_text(cx, |text| {
 6260            text.split('\n')
 6261                .map(|line| line.to_case(Case::Title))
 6262                .join("\n")
 6263        })
 6264    }
 6265
 6266    pub fn convert_to_snake_case(&mut self, _: &ConvertToSnakeCase, cx: &mut ViewContext<Self>) {
 6267        self.manipulate_text(cx, |text| text.to_case(Case::Snake))
 6268    }
 6269
 6270    pub fn convert_to_kebab_case(&mut self, _: &ConvertToKebabCase, cx: &mut ViewContext<Self>) {
 6271        self.manipulate_text(cx, |text| text.to_case(Case::Kebab))
 6272    }
 6273
 6274    pub fn convert_to_upper_camel_case(
 6275        &mut self,
 6276        _: &ConvertToUpperCamelCase,
 6277        cx: &mut ViewContext<Self>,
 6278    ) {
 6279        self.manipulate_text(cx, |text| {
 6280            text.split('\n')
 6281                .map(|line| line.to_case(Case::UpperCamel))
 6282                .join("\n")
 6283        })
 6284    }
 6285
 6286    pub fn convert_to_lower_camel_case(
 6287        &mut self,
 6288        _: &ConvertToLowerCamelCase,
 6289        cx: &mut ViewContext<Self>,
 6290    ) {
 6291        self.manipulate_text(cx, |text| text.to_case(Case::Camel))
 6292    }
 6293
 6294    pub fn convert_to_opposite_case(
 6295        &mut self,
 6296        _: &ConvertToOppositeCase,
 6297        cx: &mut ViewContext<Self>,
 6298    ) {
 6299        self.manipulate_text(cx, |text| {
 6300            text.chars()
 6301                .fold(String::with_capacity(text.len()), |mut t, c| {
 6302                    if c.is_uppercase() {
 6303                        t.extend(c.to_lowercase());
 6304                    } else {
 6305                        t.extend(c.to_uppercase());
 6306                    }
 6307                    t
 6308                })
 6309        })
 6310    }
 6311
 6312    fn manipulate_text<Fn>(&mut self, cx: &mut ViewContext<Self>, mut callback: Fn)
 6313    where
 6314        Fn: FnMut(&str) -> String,
 6315    {
 6316        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6317        let buffer = self.buffer.read(cx).snapshot(cx);
 6318
 6319        let mut new_selections = Vec::new();
 6320        let mut edits = Vec::new();
 6321        let mut selection_adjustment = 0i32;
 6322
 6323        for selection in self.selections.all::<usize>(cx) {
 6324            let selection_is_empty = selection.is_empty();
 6325
 6326            let (start, end) = if selection_is_empty {
 6327                let word_range = movement::surrounding_word(
 6328                    &display_map,
 6329                    selection.start.to_display_point(&display_map),
 6330                );
 6331                let start = word_range.start.to_offset(&display_map, Bias::Left);
 6332                let end = word_range.end.to_offset(&display_map, Bias::Left);
 6333                (start, end)
 6334            } else {
 6335                (selection.start, selection.end)
 6336            };
 6337
 6338            let text = buffer.text_for_range(start..end).collect::<String>();
 6339            let old_length = text.len() as i32;
 6340            let text = callback(&text);
 6341
 6342            new_selections.push(Selection {
 6343                start: (start as i32 - selection_adjustment) as usize,
 6344                end: ((start + text.len()) as i32 - selection_adjustment) as usize,
 6345                goal: SelectionGoal::None,
 6346                ..selection
 6347            });
 6348
 6349            selection_adjustment += old_length - text.len() as i32;
 6350
 6351            edits.push((start..end, text));
 6352        }
 6353
 6354        self.transact(cx, |this, cx| {
 6355            this.buffer.update(cx, |buffer, cx| {
 6356                buffer.edit(edits, None, cx);
 6357            });
 6358
 6359            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6360                s.select(new_selections);
 6361            });
 6362
 6363            this.request_autoscroll(Autoscroll::fit(), cx);
 6364        });
 6365    }
 6366
 6367    pub fn duplicate(&mut self, upwards: bool, whole_lines: bool, cx: &mut ViewContext<Self>) {
 6368        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6369        let buffer = &display_map.buffer_snapshot;
 6370        let selections = self.selections.all::<Point>(cx);
 6371
 6372        let mut edits = Vec::new();
 6373        let mut selections_iter = selections.iter().peekable();
 6374        while let Some(selection) = selections_iter.next() {
 6375            let mut rows = selection.spanned_rows(false, &display_map);
 6376            // duplicate line-wise
 6377            if whole_lines || selection.start == selection.end {
 6378                // Avoid duplicating the same lines twice.
 6379                while let Some(next_selection) = selections_iter.peek() {
 6380                    let next_rows = next_selection.spanned_rows(false, &display_map);
 6381                    if next_rows.start < rows.end {
 6382                        rows.end = next_rows.end;
 6383                        selections_iter.next().unwrap();
 6384                    } else {
 6385                        break;
 6386                    }
 6387                }
 6388
 6389                // Copy the text from the selected row region and splice it either at the start
 6390                // or end of the region.
 6391                let start = Point::new(rows.start.0, 0);
 6392                let end = Point::new(
 6393                    rows.end.previous_row().0,
 6394                    buffer.line_len(rows.end.previous_row()),
 6395                );
 6396                let text = buffer
 6397                    .text_for_range(start..end)
 6398                    .chain(Some("\n"))
 6399                    .collect::<String>();
 6400                let insert_location = if upwards {
 6401                    Point::new(rows.end.0, 0)
 6402                } else {
 6403                    start
 6404                };
 6405                edits.push((insert_location..insert_location, text));
 6406            } else {
 6407                // duplicate character-wise
 6408                let start = selection.start;
 6409                let end = selection.end;
 6410                let text = buffer.text_for_range(start..end).collect::<String>();
 6411                edits.push((selection.end..selection.end, text));
 6412            }
 6413        }
 6414
 6415        self.transact(cx, |this, cx| {
 6416            this.buffer.update(cx, |buffer, cx| {
 6417                buffer.edit(edits, None, cx);
 6418            });
 6419
 6420            this.request_autoscroll(Autoscroll::fit(), cx);
 6421        });
 6422    }
 6423
 6424    pub fn duplicate_line_up(&mut self, _: &DuplicateLineUp, cx: &mut ViewContext<Self>) {
 6425        self.duplicate(true, true, cx);
 6426    }
 6427
 6428    pub fn duplicate_line_down(&mut self, _: &DuplicateLineDown, cx: &mut ViewContext<Self>) {
 6429        self.duplicate(false, true, cx);
 6430    }
 6431
 6432    pub fn duplicate_selection(&mut self, _: &DuplicateSelection, cx: &mut ViewContext<Self>) {
 6433        self.duplicate(false, false, cx);
 6434    }
 6435
 6436    pub fn move_line_up(&mut self, _: &MoveLineUp, cx: &mut ViewContext<Self>) {
 6437        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6438        let buffer = self.buffer.read(cx).snapshot(cx);
 6439
 6440        let mut edits = Vec::new();
 6441        let mut unfold_ranges = Vec::new();
 6442        let mut refold_creases = Vec::new();
 6443
 6444        let selections = self.selections.all::<Point>(cx);
 6445        let mut selections = selections.iter().peekable();
 6446        let mut contiguous_row_selections = Vec::new();
 6447        let mut new_selections = Vec::new();
 6448
 6449        while let Some(selection) = selections.next() {
 6450            // Find all the selections that span a contiguous row range
 6451            let (start_row, end_row) = consume_contiguous_rows(
 6452                &mut contiguous_row_selections,
 6453                selection,
 6454                &display_map,
 6455                &mut selections,
 6456            );
 6457
 6458            // Move the text spanned by the row range to be before the line preceding the row range
 6459            if start_row.0 > 0 {
 6460                let range_to_move = Point::new(
 6461                    start_row.previous_row().0,
 6462                    buffer.line_len(start_row.previous_row()),
 6463                )
 6464                    ..Point::new(
 6465                        end_row.previous_row().0,
 6466                        buffer.line_len(end_row.previous_row()),
 6467                    );
 6468                let insertion_point = display_map
 6469                    .prev_line_boundary(Point::new(start_row.previous_row().0, 0))
 6470                    .0;
 6471
 6472                // Don't move lines across excerpts
 6473                if buffer
 6474                    .excerpt_boundaries_in_range((
 6475                        Bound::Excluded(insertion_point),
 6476                        Bound::Included(range_to_move.end),
 6477                    ))
 6478                    .next()
 6479                    .is_none()
 6480                {
 6481                    let text = buffer
 6482                        .text_for_range(range_to_move.clone())
 6483                        .flat_map(|s| s.chars())
 6484                        .skip(1)
 6485                        .chain(['\n'])
 6486                        .collect::<String>();
 6487
 6488                    edits.push((
 6489                        buffer.anchor_after(range_to_move.start)
 6490                            ..buffer.anchor_before(range_to_move.end),
 6491                        String::new(),
 6492                    ));
 6493                    let insertion_anchor = buffer.anchor_after(insertion_point);
 6494                    edits.push((insertion_anchor..insertion_anchor, text));
 6495
 6496                    let row_delta = range_to_move.start.row - insertion_point.row + 1;
 6497
 6498                    // Move selections up
 6499                    new_selections.extend(contiguous_row_selections.drain(..).map(
 6500                        |mut selection| {
 6501                            selection.start.row -= row_delta;
 6502                            selection.end.row -= row_delta;
 6503                            selection
 6504                        },
 6505                    ));
 6506
 6507                    // Move folds up
 6508                    unfold_ranges.push(range_to_move.clone());
 6509                    for fold in display_map.folds_in_range(
 6510                        buffer.anchor_before(range_to_move.start)
 6511                            ..buffer.anchor_after(range_to_move.end),
 6512                    ) {
 6513                        let mut start = fold.range.start.to_point(&buffer);
 6514                        let mut end = fold.range.end.to_point(&buffer);
 6515                        start.row -= row_delta;
 6516                        end.row -= row_delta;
 6517                        refold_creases.push(Crease::simple(start..end, fold.placeholder.clone()));
 6518                    }
 6519                }
 6520            }
 6521
 6522            // If we didn't move line(s), preserve the existing selections
 6523            new_selections.append(&mut contiguous_row_selections);
 6524        }
 6525
 6526        self.transact(cx, |this, cx| {
 6527            this.unfold_ranges(&unfold_ranges, true, true, cx);
 6528            this.buffer.update(cx, |buffer, cx| {
 6529                for (range, text) in edits {
 6530                    buffer.edit([(range, text)], None, cx);
 6531                }
 6532            });
 6533            this.fold_creases(refold_creases, true, cx);
 6534            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6535                s.select(new_selections);
 6536            })
 6537        });
 6538    }
 6539
 6540    pub fn move_line_down(&mut self, _: &MoveLineDown, cx: &mut ViewContext<Self>) {
 6541        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6542        let buffer = self.buffer.read(cx).snapshot(cx);
 6543
 6544        let mut edits = Vec::new();
 6545        let mut unfold_ranges = Vec::new();
 6546        let mut refold_creases = Vec::new();
 6547
 6548        let selections = self.selections.all::<Point>(cx);
 6549        let mut selections = selections.iter().peekable();
 6550        let mut contiguous_row_selections = Vec::new();
 6551        let mut new_selections = Vec::new();
 6552
 6553        while let Some(selection) = selections.next() {
 6554            // Find all the selections that span a contiguous row range
 6555            let (start_row, end_row) = consume_contiguous_rows(
 6556                &mut contiguous_row_selections,
 6557                selection,
 6558                &display_map,
 6559                &mut selections,
 6560            );
 6561
 6562            // Move the text spanned by the row range to be after the last line of the row range
 6563            if end_row.0 <= buffer.max_point().row {
 6564                let range_to_move =
 6565                    MultiBufferPoint::new(start_row.0, 0)..MultiBufferPoint::new(end_row.0, 0);
 6566                let insertion_point = display_map
 6567                    .next_line_boundary(MultiBufferPoint::new(end_row.0, 0))
 6568                    .0;
 6569
 6570                // Don't move lines across excerpt boundaries
 6571                if buffer
 6572                    .excerpt_boundaries_in_range((
 6573                        Bound::Excluded(range_to_move.start),
 6574                        Bound::Included(insertion_point),
 6575                    ))
 6576                    .next()
 6577                    .is_none()
 6578                {
 6579                    let mut text = String::from("\n");
 6580                    text.extend(buffer.text_for_range(range_to_move.clone()));
 6581                    text.pop(); // Drop trailing newline
 6582                    edits.push((
 6583                        buffer.anchor_after(range_to_move.start)
 6584                            ..buffer.anchor_before(range_to_move.end),
 6585                        String::new(),
 6586                    ));
 6587                    let insertion_anchor = buffer.anchor_after(insertion_point);
 6588                    edits.push((insertion_anchor..insertion_anchor, text));
 6589
 6590                    let row_delta = insertion_point.row - range_to_move.end.row + 1;
 6591
 6592                    // Move selections down
 6593                    new_selections.extend(contiguous_row_selections.drain(..).map(
 6594                        |mut selection| {
 6595                            selection.start.row += row_delta;
 6596                            selection.end.row += row_delta;
 6597                            selection
 6598                        },
 6599                    ));
 6600
 6601                    // Move folds down
 6602                    unfold_ranges.push(range_to_move.clone());
 6603                    for fold in display_map.folds_in_range(
 6604                        buffer.anchor_before(range_to_move.start)
 6605                            ..buffer.anchor_after(range_to_move.end),
 6606                    ) {
 6607                        let mut start = fold.range.start.to_point(&buffer);
 6608                        let mut end = fold.range.end.to_point(&buffer);
 6609                        start.row += row_delta;
 6610                        end.row += row_delta;
 6611                        refold_creases.push(Crease::simple(start..end, fold.placeholder.clone()));
 6612                    }
 6613                }
 6614            }
 6615
 6616            // If we didn't move line(s), preserve the existing selections
 6617            new_selections.append(&mut contiguous_row_selections);
 6618        }
 6619
 6620        self.transact(cx, |this, cx| {
 6621            this.unfold_ranges(&unfold_ranges, true, true, cx);
 6622            this.buffer.update(cx, |buffer, cx| {
 6623                for (range, text) in edits {
 6624                    buffer.edit([(range, text)], None, cx);
 6625                }
 6626            });
 6627            this.fold_creases(refold_creases, true, cx);
 6628            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(new_selections));
 6629        });
 6630    }
 6631
 6632    pub fn transpose(&mut self, _: &Transpose, cx: &mut ViewContext<Self>) {
 6633        let text_layout_details = &self.text_layout_details(cx);
 6634        self.transact(cx, |this, cx| {
 6635            let edits = this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6636                let mut edits: Vec<(Range<usize>, String)> = Default::default();
 6637                let line_mode = s.line_mode;
 6638                s.move_with(|display_map, selection| {
 6639                    if !selection.is_empty() || line_mode {
 6640                        return;
 6641                    }
 6642
 6643                    let mut head = selection.head();
 6644                    let mut transpose_offset = head.to_offset(display_map, Bias::Right);
 6645                    if head.column() == display_map.line_len(head.row()) {
 6646                        transpose_offset = display_map
 6647                            .buffer_snapshot
 6648                            .clip_offset(transpose_offset.saturating_sub(1), Bias::Left);
 6649                    }
 6650
 6651                    if transpose_offset == 0 {
 6652                        return;
 6653                    }
 6654
 6655                    *head.column_mut() += 1;
 6656                    head = display_map.clip_point(head, Bias::Right);
 6657                    let goal = SelectionGoal::HorizontalPosition(
 6658                        display_map
 6659                            .x_for_display_point(head, text_layout_details)
 6660                            .into(),
 6661                    );
 6662                    selection.collapse_to(head, goal);
 6663
 6664                    let transpose_start = display_map
 6665                        .buffer_snapshot
 6666                        .clip_offset(transpose_offset.saturating_sub(1), Bias::Left);
 6667                    if edits.last().map_or(true, |e| e.0.end <= transpose_start) {
 6668                        let transpose_end = display_map
 6669                            .buffer_snapshot
 6670                            .clip_offset(transpose_offset + 1, Bias::Right);
 6671                        if let Some(ch) =
 6672                            display_map.buffer_snapshot.chars_at(transpose_start).next()
 6673                        {
 6674                            edits.push((transpose_start..transpose_offset, String::new()));
 6675                            edits.push((transpose_end..transpose_end, ch.to_string()));
 6676                        }
 6677                    }
 6678                });
 6679                edits
 6680            });
 6681            this.buffer
 6682                .update(cx, |buffer, cx| buffer.edit(edits, None, cx));
 6683            let selections = this.selections.all::<usize>(cx);
 6684            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6685                s.select(selections);
 6686            });
 6687        });
 6688    }
 6689
 6690    pub fn rewrap(&mut self, _: &Rewrap, cx: &mut ViewContext<Self>) {
 6691        self.rewrap_impl(IsVimMode::No, cx)
 6692    }
 6693
 6694    pub fn rewrap_impl(&mut self, is_vim_mode: IsVimMode, cx: &mut ViewContext<Self>) {
 6695        let buffer = self.buffer.read(cx).snapshot(cx);
 6696        let selections = self.selections.all::<Point>(cx);
 6697        let mut selections = selections.iter().peekable();
 6698
 6699        let mut edits = Vec::new();
 6700        let mut rewrapped_row_ranges = Vec::<RangeInclusive<u32>>::new();
 6701
 6702        while let Some(selection) = selections.next() {
 6703            let mut start_row = selection.start.row;
 6704            let mut end_row = selection.end.row;
 6705
 6706            // Skip selections that overlap with a range that has already been rewrapped.
 6707            let selection_range = start_row..end_row;
 6708            if rewrapped_row_ranges
 6709                .iter()
 6710                .any(|range| range.overlaps(&selection_range))
 6711            {
 6712                continue;
 6713            }
 6714
 6715            let mut should_rewrap = is_vim_mode == IsVimMode::Yes;
 6716
 6717            if let Some(language_scope) = buffer.language_scope_at(selection.head()) {
 6718                match language_scope.language_name().0.as_ref() {
 6719                    "Markdown" | "Plain Text" => {
 6720                        should_rewrap = true;
 6721                    }
 6722                    _ => {}
 6723                }
 6724            }
 6725
 6726            let tab_size = buffer.settings_at(selection.head(), cx).tab_size;
 6727
 6728            // Since not all lines in the selection may be at the same indent
 6729            // level, choose the indent size that is the most common between all
 6730            // of the lines.
 6731            //
 6732            // If there is a tie, we use the deepest indent.
 6733            let (indent_size, indent_end) = {
 6734                let mut indent_size_occurrences = HashMap::default();
 6735                let mut rows_by_indent_size = HashMap::<IndentSize, Vec<u32>>::default();
 6736
 6737                for row in start_row..=end_row {
 6738                    let indent = buffer.indent_size_for_line(MultiBufferRow(row));
 6739                    rows_by_indent_size.entry(indent).or_default().push(row);
 6740                    *indent_size_occurrences.entry(indent).or_insert(0) += 1;
 6741                }
 6742
 6743                let indent_size = indent_size_occurrences
 6744                    .into_iter()
 6745                    .max_by_key(|(indent, count)| (*count, indent.len_with_expanded_tabs(tab_size)))
 6746                    .map(|(indent, _)| indent)
 6747                    .unwrap_or_default();
 6748                let row = rows_by_indent_size[&indent_size][0];
 6749                let indent_end = Point::new(row, indent_size.len);
 6750
 6751                (indent_size, indent_end)
 6752            };
 6753
 6754            let mut line_prefix = indent_size.chars().collect::<String>();
 6755
 6756            if let Some(comment_prefix) =
 6757                buffer
 6758                    .language_scope_at(selection.head())
 6759                    .and_then(|language| {
 6760                        language
 6761                            .line_comment_prefixes()
 6762                            .iter()
 6763                            .find(|prefix| buffer.contains_str_at(indent_end, prefix))
 6764                            .cloned()
 6765                    })
 6766            {
 6767                line_prefix.push_str(&comment_prefix);
 6768                should_rewrap = true;
 6769            }
 6770
 6771            if !should_rewrap {
 6772                continue;
 6773            }
 6774
 6775            if selection.is_empty() {
 6776                'expand_upwards: while start_row > 0 {
 6777                    let prev_row = start_row - 1;
 6778                    if buffer.contains_str_at(Point::new(prev_row, 0), &line_prefix)
 6779                        && buffer.line_len(MultiBufferRow(prev_row)) as usize > line_prefix.len()
 6780                    {
 6781                        start_row = prev_row;
 6782                    } else {
 6783                        break 'expand_upwards;
 6784                    }
 6785                }
 6786
 6787                'expand_downwards: while end_row < buffer.max_point().row {
 6788                    let next_row = end_row + 1;
 6789                    if buffer.contains_str_at(Point::new(next_row, 0), &line_prefix)
 6790                        && buffer.line_len(MultiBufferRow(next_row)) as usize > line_prefix.len()
 6791                    {
 6792                        end_row = next_row;
 6793                    } else {
 6794                        break 'expand_downwards;
 6795                    }
 6796                }
 6797            }
 6798
 6799            let start = Point::new(start_row, 0);
 6800            let end = Point::new(end_row, buffer.line_len(MultiBufferRow(end_row)));
 6801            let selection_text = buffer.text_for_range(start..end).collect::<String>();
 6802            let Some(lines_without_prefixes) = selection_text
 6803                .lines()
 6804                .map(|line| {
 6805                    line.strip_prefix(&line_prefix)
 6806                        .or_else(|| line.trim_start().strip_prefix(&line_prefix.trim_start()))
 6807                        .ok_or_else(|| {
 6808                            anyhow!("line did not start with prefix {line_prefix:?}: {line:?}")
 6809                        })
 6810                })
 6811                .collect::<Result<Vec<_>, _>>()
 6812                .log_err()
 6813            else {
 6814                continue;
 6815            };
 6816
 6817            let wrap_column = buffer
 6818                .settings_at(Point::new(start_row, 0), cx)
 6819                .preferred_line_length as usize;
 6820            let wrapped_text = wrap_with_prefix(
 6821                line_prefix,
 6822                lines_without_prefixes.join(" "),
 6823                wrap_column,
 6824                tab_size,
 6825            );
 6826
 6827            // TODO: should always use char-based diff while still supporting cursor behavior that
 6828            // matches vim.
 6829            let diff = match is_vim_mode {
 6830                IsVimMode::Yes => TextDiff::from_lines(&selection_text, &wrapped_text),
 6831                IsVimMode::No => TextDiff::from_chars(&selection_text, &wrapped_text),
 6832            };
 6833            let mut offset = start.to_offset(&buffer);
 6834            let mut moved_since_edit = true;
 6835
 6836            for change in diff.iter_all_changes() {
 6837                let value = change.value();
 6838                match change.tag() {
 6839                    ChangeTag::Equal => {
 6840                        offset += value.len();
 6841                        moved_since_edit = true;
 6842                    }
 6843                    ChangeTag::Delete => {
 6844                        let start = buffer.anchor_after(offset);
 6845                        let end = buffer.anchor_before(offset + value.len());
 6846
 6847                        if moved_since_edit {
 6848                            edits.push((start..end, String::new()));
 6849                        } else {
 6850                            edits.last_mut().unwrap().0.end = end;
 6851                        }
 6852
 6853                        offset += value.len();
 6854                        moved_since_edit = false;
 6855                    }
 6856                    ChangeTag::Insert => {
 6857                        if moved_since_edit {
 6858                            let anchor = buffer.anchor_after(offset);
 6859                            edits.push((anchor..anchor, value.to_string()));
 6860                        } else {
 6861                            edits.last_mut().unwrap().1.push_str(value);
 6862                        }
 6863
 6864                        moved_since_edit = false;
 6865                    }
 6866                }
 6867            }
 6868
 6869            rewrapped_row_ranges.push(start_row..=end_row);
 6870        }
 6871
 6872        self.buffer
 6873            .update(cx, |buffer, cx| buffer.edit(edits, None, cx));
 6874    }
 6875
 6876    pub fn cut_common(&mut self, cx: &mut ViewContext<Self>) -> ClipboardItem {
 6877        let mut text = String::new();
 6878        let buffer = self.buffer.read(cx).snapshot(cx);
 6879        let mut selections = self.selections.all::<Point>(cx);
 6880        let mut clipboard_selections = Vec::with_capacity(selections.len());
 6881        {
 6882            let max_point = buffer.max_point();
 6883            let mut is_first = true;
 6884            for selection in &mut selections {
 6885                let is_entire_line = selection.is_empty() || self.selections.line_mode;
 6886                if is_entire_line {
 6887                    selection.start = Point::new(selection.start.row, 0);
 6888                    if !selection.is_empty() && selection.end.column == 0 {
 6889                        selection.end = cmp::min(max_point, selection.end);
 6890                    } else {
 6891                        selection.end = cmp::min(max_point, Point::new(selection.end.row + 1, 0));
 6892                    }
 6893                    selection.goal = SelectionGoal::None;
 6894                }
 6895                if is_first {
 6896                    is_first = false;
 6897                } else {
 6898                    text += "\n";
 6899                }
 6900                let mut len = 0;
 6901                for chunk in buffer.text_for_range(selection.start..selection.end) {
 6902                    text.push_str(chunk);
 6903                    len += chunk.len();
 6904                }
 6905                clipboard_selections.push(ClipboardSelection {
 6906                    len,
 6907                    is_entire_line,
 6908                    first_line_indent: buffer
 6909                        .indent_size_for_line(MultiBufferRow(selection.start.row))
 6910                        .len,
 6911                });
 6912            }
 6913        }
 6914
 6915        self.transact(cx, |this, cx| {
 6916            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6917                s.select(selections);
 6918            });
 6919            this.insert("", cx);
 6920        });
 6921        ClipboardItem::new_string_with_json_metadata(text, clipboard_selections)
 6922    }
 6923
 6924    pub fn cut(&mut self, _: &Cut, cx: &mut ViewContext<Self>) {
 6925        let item = self.cut_common(cx);
 6926        cx.write_to_clipboard(item);
 6927    }
 6928
 6929    pub fn kill_ring_cut(&mut self, _: &KillRingCut, cx: &mut ViewContext<Self>) {
 6930        self.change_selections(None, cx, |s| {
 6931            s.move_with(|snapshot, sel| {
 6932                if sel.is_empty() {
 6933                    sel.end = DisplayPoint::new(sel.end.row(), snapshot.line_len(sel.end.row()))
 6934                }
 6935            });
 6936        });
 6937        let item = self.cut_common(cx);
 6938        cx.set_global(KillRing(item))
 6939    }
 6940
 6941    pub fn kill_ring_yank(&mut self, _: &KillRingYank, cx: &mut ViewContext<Self>) {
 6942        let (text, metadata) = if let Some(KillRing(item)) = cx.try_global() {
 6943            if let Some(ClipboardEntry::String(kill_ring)) = item.entries().first() {
 6944                (kill_ring.text().to_string(), kill_ring.metadata_json())
 6945            } else {
 6946                return;
 6947            }
 6948        } else {
 6949            return;
 6950        };
 6951        self.do_paste(&text, metadata, false, cx);
 6952    }
 6953
 6954    pub fn copy(&mut self, _: &Copy, cx: &mut ViewContext<Self>) {
 6955        let selections = self.selections.all::<Point>(cx);
 6956        let buffer = self.buffer.read(cx).read(cx);
 6957        let mut text = String::new();
 6958
 6959        let mut clipboard_selections = Vec::with_capacity(selections.len());
 6960        {
 6961            let max_point = buffer.max_point();
 6962            let mut is_first = true;
 6963            for selection in selections.iter() {
 6964                let mut start = selection.start;
 6965                let mut end = selection.end;
 6966                let is_entire_line = selection.is_empty() || self.selections.line_mode;
 6967                if is_entire_line {
 6968                    start = Point::new(start.row, 0);
 6969                    end = cmp::min(max_point, Point::new(end.row + 1, 0));
 6970                }
 6971                if is_first {
 6972                    is_first = false;
 6973                } else {
 6974                    text += "\n";
 6975                }
 6976                let mut len = 0;
 6977                for chunk in buffer.text_for_range(start..end) {
 6978                    text.push_str(chunk);
 6979                    len += chunk.len();
 6980                }
 6981                clipboard_selections.push(ClipboardSelection {
 6982                    len,
 6983                    is_entire_line,
 6984                    first_line_indent: buffer.indent_size_for_line(MultiBufferRow(start.row)).len,
 6985                });
 6986            }
 6987        }
 6988
 6989        cx.write_to_clipboard(ClipboardItem::new_string_with_json_metadata(
 6990            text,
 6991            clipboard_selections,
 6992        ));
 6993    }
 6994
 6995    pub fn do_paste(
 6996        &mut self,
 6997        text: &String,
 6998        clipboard_selections: Option<Vec<ClipboardSelection>>,
 6999        handle_entire_lines: bool,
 7000        cx: &mut ViewContext<Self>,
 7001    ) {
 7002        if self.read_only(cx) {
 7003            return;
 7004        }
 7005
 7006        let clipboard_text = Cow::Borrowed(text);
 7007
 7008        self.transact(cx, |this, cx| {
 7009            if let Some(mut clipboard_selections) = clipboard_selections {
 7010                let old_selections = this.selections.all::<usize>(cx);
 7011                let all_selections_were_entire_line =
 7012                    clipboard_selections.iter().all(|s| s.is_entire_line);
 7013                let first_selection_indent_column =
 7014                    clipboard_selections.first().map(|s| s.first_line_indent);
 7015                if clipboard_selections.len() != old_selections.len() {
 7016                    clipboard_selections.drain(..);
 7017                }
 7018                let cursor_offset = this.selections.last::<usize>(cx).head();
 7019                let mut auto_indent_on_paste = true;
 7020
 7021                this.buffer.update(cx, |buffer, cx| {
 7022                    let snapshot = buffer.read(cx);
 7023                    auto_indent_on_paste =
 7024                        snapshot.settings_at(cursor_offset, cx).auto_indent_on_paste;
 7025
 7026                    let mut start_offset = 0;
 7027                    let mut edits = Vec::new();
 7028                    let mut original_indent_columns = Vec::new();
 7029                    for (ix, selection) in old_selections.iter().enumerate() {
 7030                        let to_insert;
 7031                        let entire_line;
 7032                        let original_indent_column;
 7033                        if let Some(clipboard_selection) = clipboard_selections.get(ix) {
 7034                            let end_offset = start_offset + clipboard_selection.len;
 7035                            to_insert = &clipboard_text[start_offset..end_offset];
 7036                            entire_line = clipboard_selection.is_entire_line;
 7037                            start_offset = end_offset + 1;
 7038                            original_indent_column = Some(clipboard_selection.first_line_indent);
 7039                        } else {
 7040                            to_insert = clipboard_text.as_str();
 7041                            entire_line = all_selections_were_entire_line;
 7042                            original_indent_column = first_selection_indent_column
 7043                        }
 7044
 7045                        // If the corresponding selection was empty when this slice of the
 7046                        // clipboard text was written, then the entire line containing the
 7047                        // selection was copied. If this selection is also currently empty,
 7048                        // then paste the line before the current line of the buffer.
 7049                        let range = if selection.is_empty() && handle_entire_lines && entire_line {
 7050                            let column = selection.start.to_point(&snapshot).column as usize;
 7051                            let line_start = selection.start - column;
 7052                            line_start..line_start
 7053                        } else {
 7054                            selection.range()
 7055                        };
 7056
 7057                        edits.push((range, to_insert));
 7058                        original_indent_columns.extend(original_indent_column);
 7059                    }
 7060                    drop(snapshot);
 7061
 7062                    buffer.edit(
 7063                        edits,
 7064                        if auto_indent_on_paste {
 7065                            Some(AutoindentMode::Block {
 7066                                original_indent_columns,
 7067                            })
 7068                        } else {
 7069                            None
 7070                        },
 7071                        cx,
 7072                    );
 7073                });
 7074
 7075                let selections = this.selections.all::<usize>(cx);
 7076                this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 7077            } else {
 7078                this.insert(&clipboard_text, cx);
 7079            }
 7080        });
 7081    }
 7082
 7083    pub fn paste(&mut self, _: &Paste, cx: &mut ViewContext<Self>) {
 7084        if let Some(item) = cx.read_from_clipboard() {
 7085            let entries = item.entries();
 7086
 7087            match entries.first() {
 7088                // For now, we only support applying metadata if there's one string. In the future, we can incorporate all the selections
 7089                // of all the pasted entries.
 7090                Some(ClipboardEntry::String(clipboard_string)) if entries.len() == 1 => self
 7091                    .do_paste(
 7092                        clipboard_string.text(),
 7093                        clipboard_string.metadata_json::<Vec<ClipboardSelection>>(),
 7094                        true,
 7095                        cx,
 7096                    ),
 7097                _ => self.do_paste(&item.text().unwrap_or_default(), None, true, cx),
 7098            }
 7099        }
 7100    }
 7101
 7102    pub fn undo(&mut self, _: &Undo, cx: &mut ViewContext<Self>) {
 7103        if self.read_only(cx) {
 7104            return;
 7105        }
 7106
 7107        if let Some(transaction_id) = self.buffer.update(cx, |buffer, cx| buffer.undo(cx)) {
 7108            if let Some((selections, _)) =
 7109                self.selection_history.transaction(transaction_id).cloned()
 7110            {
 7111                self.change_selections(None, cx, |s| {
 7112                    s.select_anchors(selections.to_vec());
 7113                });
 7114            }
 7115            self.request_autoscroll(Autoscroll::fit(), cx);
 7116            self.unmark_text(cx);
 7117            self.refresh_inline_completion(true, false, cx);
 7118            cx.emit(EditorEvent::Edited { transaction_id });
 7119            cx.emit(EditorEvent::TransactionUndone { transaction_id });
 7120        }
 7121    }
 7122
 7123    pub fn redo(&mut self, _: &Redo, cx: &mut ViewContext<Self>) {
 7124        if self.read_only(cx) {
 7125            return;
 7126        }
 7127
 7128        if let Some(transaction_id) = self.buffer.update(cx, |buffer, cx| buffer.redo(cx)) {
 7129            if let Some((_, Some(selections))) =
 7130                self.selection_history.transaction(transaction_id).cloned()
 7131            {
 7132                self.change_selections(None, cx, |s| {
 7133                    s.select_anchors(selections.to_vec());
 7134                });
 7135            }
 7136            self.request_autoscroll(Autoscroll::fit(), cx);
 7137            self.unmark_text(cx);
 7138            self.refresh_inline_completion(true, false, cx);
 7139            cx.emit(EditorEvent::Edited { transaction_id });
 7140        }
 7141    }
 7142
 7143    pub fn finalize_last_transaction(&mut self, cx: &mut ViewContext<Self>) {
 7144        self.buffer
 7145            .update(cx, |buffer, cx| buffer.finalize_last_transaction(cx));
 7146    }
 7147
 7148    pub fn group_until_transaction(&mut self, tx_id: TransactionId, cx: &mut ViewContext<Self>) {
 7149        self.buffer
 7150            .update(cx, |buffer, cx| buffer.group_until_transaction(tx_id, cx));
 7151    }
 7152
 7153    pub fn move_left(&mut self, _: &MoveLeft, cx: &mut ViewContext<Self>) {
 7154        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7155            let line_mode = s.line_mode;
 7156            s.move_with(|map, selection| {
 7157                let cursor = if selection.is_empty() && !line_mode {
 7158                    movement::left(map, selection.start)
 7159                } else {
 7160                    selection.start
 7161                };
 7162                selection.collapse_to(cursor, SelectionGoal::None);
 7163            });
 7164        })
 7165    }
 7166
 7167    pub fn select_left(&mut self, _: &SelectLeft, cx: &mut ViewContext<Self>) {
 7168        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7169            s.move_heads_with(|map, head, _| (movement::left(map, head), SelectionGoal::None));
 7170        })
 7171    }
 7172
 7173    pub fn move_right(&mut self, _: &MoveRight, cx: &mut ViewContext<Self>) {
 7174        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7175            let line_mode = s.line_mode;
 7176            s.move_with(|map, selection| {
 7177                let cursor = if selection.is_empty() && !line_mode {
 7178                    movement::right(map, selection.end)
 7179                } else {
 7180                    selection.end
 7181                };
 7182                selection.collapse_to(cursor, SelectionGoal::None)
 7183            });
 7184        })
 7185    }
 7186
 7187    pub fn select_right(&mut self, _: &SelectRight, cx: &mut ViewContext<Self>) {
 7188        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7189            s.move_heads_with(|map, head, _| (movement::right(map, head), SelectionGoal::None));
 7190        })
 7191    }
 7192
 7193    pub fn move_up(&mut self, _: &MoveUp, cx: &mut ViewContext<Self>) {
 7194        if self.take_rename(true, cx).is_some() {
 7195            return;
 7196        }
 7197
 7198        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7199            cx.propagate();
 7200            return;
 7201        }
 7202
 7203        let text_layout_details = &self.text_layout_details(cx);
 7204        let selection_count = self.selections.count();
 7205        let first_selection = self.selections.first_anchor();
 7206
 7207        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7208            let line_mode = s.line_mode;
 7209            s.move_with(|map, selection| {
 7210                if !selection.is_empty() && !line_mode {
 7211                    selection.goal = SelectionGoal::None;
 7212                }
 7213                let (cursor, goal) = movement::up(
 7214                    map,
 7215                    selection.start,
 7216                    selection.goal,
 7217                    false,
 7218                    text_layout_details,
 7219                );
 7220                selection.collapse_to(cursor, goal);
 7221            });
 7222        });
 7223
 7224        if selection_count == 1 && first_selection.range() == self.selections.first_anchor().range()
 7225        {
 7226            cx.propagate();
 7227        }
 7228    }
 7229
 7230    pub fn move_up_by_lines(&mut self, action: &MoveUpByLines, cx: &mut ViewContext<Self>) {
 7231        if self.take_rename(true, cx).is_some() {
 7232            return;
 7233        }
 7234
 7235        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7236            cx.propagate();
 7237            return;
 7238        }
 7239
 7240        let text_layout_details = &self.text_layout_details(cx);
 7241
 7242        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7243            let line_mode = s.line_mode;
 7244            s.move_with(|map, selection| {
 7245                if !selection.is_empty() && !line_mode {
 7246                    selection.goal = SelectionGoal::None;
 7247                }
 7248                let (cursor, goal) = movement::up_by_rows(
 7249                    map,
 7250                    selection.start,
 7251                    action.lines,
 7252                    selection.goal,
 7253                    false,
 7254                    text_layout_details,
 7255                );
 7256                selection.collapse_to(cursor, goal);
 7257            });
 7258        })
 7259    }
 7260
 7261    pub fn move_down_by_lines(&mut self, action: &MoveDownByLines, cx: &mut ViewContext<Self>) {
 7262        if self.take_rename(true, cx).is_some() {
 7263            return;
 7264        }
 7265
 7266        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7267            cx.propagate();
 7268            return;
 7269        }
 7270
 7271        let text_layout_details = &self.text_layout_details(cx);
 7272
 7273        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7274            let line_mode = s.line_mode;
 7275            s.move_with(|map, selection| {
 7276                if !selection.is_empty() && !line_mode {
 7277                    selection.goal = SelectionGoal::None;
 7278                }
 7279                let (cursor, goal) = movement::down_by_rows(
 7280                    map,
 7281                    selection.start,
 7282                    action.lines,
 7283                    selection.goal,
 7284                    false,
 7285                    text_layout_details,
 7286                );
 7287                selection.collapse_to(cursor, goal);
 7288            });
 7289        })
 7290    }
 7291
 7292    pub fn select_down_by_lines(&mut self, action: &SelectDownByLines, cx: &mut ViewContext<Self>) {
 7293        let text_layout_details = &self.text_layout_details(cx);
 7294        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7295            s.move_heads_with(|map, head, goal| {
 7296                movement::down_by_rows(map, head, action.lines, goal, false, text_layout_details)
 7297            })
 7298        })
 7299    }
 7300
 7301    pub fn select_up_by_lines(&mut self, action: &SelectUpByLines, cx: &mut ViewContext<Self>) {
 7302        let text_layout_details = &self.text_layout_details(cx);
 7303        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7304            s.move_heads_with(|map, head, goal| {
 7305                movement::up_by_rows(map, head, action.lines, goal, false, text_layout_details)
 7306            })
 7307        })
 7308    }
 7309
 7310    pub fn select_page_up(&mut self, _: &SelectPageUp, cx: &mut ViewContext<Self>) {
 7311        let Some(row_count) = self.visible_row_count() else {
 7312            return;
 7313        };
 7314
 7315        let text_layout_details = &self.text_layout_details(cx);
 7316
 7317        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7318            s.move_heads_with(|map, head, goal| {
 7319                movement::up_by_rows(map, head, row_count, goal, false, text_layout_details)
 7320            })
 7321        })
 7322    }
 7323
 7324    pub fn move_page_up(&mut self, action: &MovePageUp, cx: &mut ViewContext<Self>) {
 7325        if self.take_rename(true, cx).is_some() {
 7326            return;
 7327        }
 7328
 7329        if self
 7330            .context_menu
 7331            .borrow_mut()
 7332            .as_mut()
 7333            .map(|menu| menu.select_first(self.completion_provider.as_deref(), cx))
 7334            .unwrap_or(false)
 7335        {
 7336            return;
 7337        }
 7338
 7339        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7340            cx.propagate();
 7341            return;
 7342        }
 7343
 7344        let Some(row_count) = self.visible_row_count() else {
 7345            return;
 7346        };
 7347
 7348        let autoscroll = if action.center_cursor {
 7349            Autoscroll::center()
 7350        } else {
 7351            Autoscroll::fit()
 7352        };
 7353
 7354        let text_layout_details = &self.text_layout_details(cx);
 7355
 7356        self.change_selections(Some(autoscroll), cx, |s| {
 7357            let line_mode = s.line_mode;
 7358            s.move_with(|map, selection| {
 7359                if !selection.is_empty() && !line_mode {
 7360                    selection.goal = SelectionGoal::None;
 7361                }
 7362                let (cursor, goal) = movement::up_by_rows(
 7363                    map,
 7364                    selection.end,
 7365                    row_count,
 7366                    selection.goal,
 7367                    false,
 7368                    text_layout_details,
 7369                );
 7370                selection.collapse_to(cursor, goal);
 7371            });
 7372        });
 7373    }
 7374
 7375    pub fn select_up(&mut self, _: &SelectUp, cx: &mut ViewContext<Self>) {
 7376        let text_layout_details = &self.text_layout_details(cx);
 7377        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7378            s.move_heads_with(|map, head, goal| {
 7379                movement::up(map, head, goal, false, text_layout_details)
 7380            })
 7381        })
 7382    }
 7383
 7384    pub fn move_down(&mut self, _: &MoveDown, cx: &mut ViewContext<Self>) {
 7385        self.take_rename(true, cx);
 7386
 7387        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7388            cx.propagate();
 7389            return;
 7390        }
 7391
 7392        let text_layout_details = &self.text_layout_details(cx);
 7393        let selection_count = self.selections.count();
 7394        let first_selection = self.selections.first_anchor();
 7395
 7396        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7397            let line_mode = s.line_mode;
 7398            s.move_with(|map, selection| {
 7399                if !selection.is_empty() && !line_mode {
 7400                    selection.goal = SelectionGoal::None;
 7401                }
 7402                let (cursor, goal) = movement::down(
 7403                    map,
 7404                    selection.end,
 7405                    selection.goal,
 7406                    false,
 7407                    text_layout_details,
 7408                );
 7409                selection.collapse_to(cursor, goal);
 7410            });
 7411        });
 7412
 7413        if selection_count == 1 && first_selection.range() == self.selections.first_anchor().range()
 7414        {
 7415            cx.propagate();
 7416        }
 7417    }
 7418
 7419    pub fn select_page_down(&mut self, _: &SelectPageDown, cx: &mut ViewContext<Self>) {
 7420        let Some(row_count) = self.visible_row_count() else {
 7421            return;
 7422        };
 7423
 7424        let text_layout_details = &self.text_layout_details(cx);
 7425
 7426        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7427            s.move_heads_with(|map, head, goal| {
 7428                movement::down_by_rows(map, head, row_count, goal, false, text_layout_details)
 7429            })
 7430        })
 7431    }
 7432
 7433    pub fn move_page_down(&mut self, action: &MovePageDown, cx: &mut ViewContext<Self>) {
 7434        if self.take_rename(true, cx).is_some() {
 7435            return;
 7436        }
 7437
 7438        if self
 7439            .context_menu
 7440            .borrow_mut()
 7441            .as_mut()
 7442            .map(|menu| menu.select_last(self.completion_provider.as_deref(), cx))
 7443            .unwrap_or(false)
 7444        {
 7445            return;
 7446        }
 7447
 7448        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7449            cx.propagate();
 7450            return;
 7451        }
 7452
 7453        let Some(row_count) = self.visible_row_count() else {
 7454            return;
 7455        };
 7456
 7457        let autoscroll = if action.center_cursor {
 7458            Autoscroll::center()
 7459        } else {
 7460            Autoscroll::fit()
 7461        };
 7462
 7463        let text_layout_details = &self.text_layout_details(cx);
 7464        self.change_selections(Some(autoscroll), cx, |s| {
 7465            let line_mode = s.line_mode;
 7466            s.move_with(|map, selection| {
 7467                if !selection.is_empty() && !line_mode {
 7468                    selection.goal = SelectionGoal::None;
 7469                }
 7470                let (cursor, goal) = movement::down_by_rows(
 7471                    map,
 7472                    selection.end,
 7473                    row_count,
 7474                    selection.goal,
 7475                    false,
 7476                    text_layout_details,
 7477                );
 7478                selection.collapse_to(cursor, goal);
 7479            });
 7480        });
 7481    }
 7482
 7483    pub fn select_down(&mut self, _: &SelectDown, cx: &mut ViewContext<Self>) {
 7484        let text_layout_details = &self.text_layout_details(cx);
 7485        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7486            s.move_heads_with(|map, head, goal| {
 7487                movement::down(map, head, goal, false, text_layout_details)
 7488            })
 7489        });
 7490    }
 7491
 7492    pub fn context_menu_first(&mut self, _: &ContextMenuFirst, cx: &mut ViewContext<Self>) {
 7493        if let Some(context_menu) = self.context_menu.borrow_mut().as_mut() {
 7494            context_menu.select_first(self.completion_provider.as_deref(), cx);
 7495        }
 7496    }
 7497
 7498    pub fn context_menu_prev(&mut self, _: &ContextMenuPrev, cx: &mut ViewContext<Self>) {
 7499        if let Some(context_menu) = self.context_menu.borrow_mut().as_mut() {
 7500            context_menu.select_prev(self.completion_provider.as_deref(), cx);
 7501        }
 7502    }
 7503
 7504    pub fn context_menu_next(&mut self, _: &ContextMenuNext, cx: &mut ViewContext<Self>) {
 7505        if let Some(context_menu) = self.context_menu.borrow_mut().as_mut() {
 7506            context_menu.select_next(self.completion_provider.as_deref(), cx);
 7507        }
 7508    }
 7509
 7510    pub fn context_menu_last(&mut self, _: &ContextMenuLast, cx: &mut ViewContext<Self>) {
 7511        if let Some(context_menu) = self.context_menu.borrow_mut().as_mut() {
 7512            context_menu.select_last(self.completion_provider.as_deref(), cx);
 7513        }
 7514    }
 7515
 7516    pub fn move_to_previous_word_start(
 7517        &mut self,
 7518        _: &MoveToPreviousWordStart,
 7519        cx: &mut ViewContext<Self>,
 7520    ) {
 7521        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7522            s.move_cursors_with(|map, head, _| {
 7523                (
 7524                    movement::previous_word_start(map, head),
 7525                    SelectionGoal::None,
 7526                )
 7527            });
 7528        })
 7529    }
 7530
 7531    pub fn move_to_previous_subword_start(
 7532        &mut self,
 7533        _: &MoveToPreviousSubwordStart,
 7534        cx: &mut ViewContext<Self>,
 7535    ) {
 7536        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7537            s.move_cursors_with(|map, head, _| {
 7538                (
 7539                    movement::previous_subword_start(map, head),
 7540                    SelectionGoal::None,
 7541                )
 7542            });
 7543        })
 7544    }
 7545
 7546    pub fn select_to_previous_word_start(
 7547        &mut self,
 7548        _: &SelectToPreviousWordStart,
 7549        cx: &mut ViewContext<Self>,
 7550    ) {
 7551        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7552            s.move_heads_with(|map, head, _| {
 7553                (
 7554                    movement::previous_word_start(map, head),
 7555                    SelectionGoal::None,
 7556                )
 7557            });
 7558        })
 7559    }
 7560
 7561    pub fn select_to_previous_subword_start(
 7562        &mut self,
 7563        _: &SelectToPreviousSubwordStart,
 7564        cx: &mut ViewContext<Self>,
 7565    ) {
 7566        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7567            s.move_heads_with(|map, head, _| {
 7568                (
 7569                    movement::previous_subword_start(map, head),
 7570                    SelectionGoal::None,
 7571                )
 7572            });
 7573        })
 7574    }
 7575
 7576    pub fn delete_to_previous_word_start(
 7577        &mut self,
 7578        action: &DeleteToPreviousWordStart,
 7579        cx: &mut ViewContext<Self>,
 7580    ) {
 7581        self.transact(cx, |this, cx| {
 7582            this.select_autoclose_pair(cx);
 7583            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7584                let line_mode = s.line_mode;
 7585                s.move_with(|map, selection| {
 7586                    if selection.is_empty() && !line_mode {
 7587                        let cursor = if action.ignore_newlines {
 7588                            movement::previous_word_start(map, selection.head())
 7589                        } else {
 7590                            movement::previous_word_start_or_newline(map, selection.head())
 7591                        };
 7592                        selection.set_head(cursor, SelectionGoal::None);
 7593                    }
 7594                });
 7595            });
 7596            this.insert("", cx);
 7597        });
 7598    }
 7599
 7600    pub fn delete_to_previous_subword_start(
 7601        &mut self,
 7602        _: &DeleteToPreviousSubwordStart,
 7603        cx: &mut ViewContext<Self>,
 7604    ) {
 7605        self.transact(cx, |this, cx| {
 7606            this.select_autoclose_pair(cx);
 7607            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7608                let line_mode = s.line_mode;
 7609                s.move_with(|map, selection| {
 7610                    if selection.is_empty() && !line_mode {
 7611                        let cursor = movement::previous_subword_start(map, selection.head());
 7612                        selection.set_head(cursor, SelectionGoal::None);
 7613                    }
 7614                });
 7615            });
 7616            this.insert("", cx);
 7617        });
 7618    }
 7619
 7620    pub fn move_to_next_word_end(&mut self, _: &MoveToNextWordEnd, cx: &mut ViewContext<Self>) {
 7621        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7622            s.move_cursors_with(|map, head, _| {
 7623                (movement::next_word_end(map, head), SelectionGoal::None)
 7624            });
 7625        })
 7626    }
 7627
 7628    pub fn move_to_next_subword_end(
 7629        &mut self,
 7630        _: &MoveToNextSubwordEnd,
 7631        cx: &mut ViewContext<Self>,
 7632    ) {
 7633        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7634            s.move_cursors_with(|map, head, _| {
 7635                (movement::next_subword_end(map, head), SelectionGoal::None)
 7636            });
 7637        })
 7638    }
 7639
 7640    pub fn select_to_next_word_end(&mut self, _: &SelectToNextWordEnd, cx: &mut ViewContext<Self>) {
 7641        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7642            s.move_heads_with(|map, head, _| {
 7643                (movement::next_word_end(map, head), SelectionGoal::None)
 7644            });
 7645        })
 7646    }
 7647
 7648    pub fn select_to_next_subword_end(
 7649        &mut self,
 7650        _: &SelectToNextSubwordEnd,
 7651        cx: &mut ViewContext<Self>,
 7652    ) {
 7653        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7654            s.move_heads_with(|map, head, _| {
 7655                (movement::next_subword_end(map, head), SelectionGoal::None)
 7656            });
 7657        })
 7658    }
 7659
 7660    pub fn delete_to_next_word_end(
 7661        &mut self,
 7662        action: &DeleteToNextWordEnd,
 7663        cx: &mut ViewContext<Self>,
 7664    ) {
 7665        self.transact(cx, |this, cx| {
 7666            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7667                let line_mode = s.line_mode;
 7668                s.move_with(|map, selection| {
 7669                    if selection.is_empty() && !line_mode {
 7670                        let cursor = if action.ignore_newlines {
 7671                            movement::next_word_end(map, selection.head())
 7672                        } else {
 7673                            movement::next_word_end_or_newline(map, selection.head())
 7674                        };
 7675                        selection.set_head(cursor, SelectionGoal::None);
 7676                    }
 7677                });
 7678            });
 7679            this.insert("", cx);
 7680        });
 7681    }
 7682
 7683    pub fn delete_to_next_subword_end(
 7684        &mut self,
 7685        _: &DeleteToNextSubwordEnd,
 7686        cx: &mut ViewContext<Self>,
 7687    ) {
 7688        self.transact(cx, |this, cx| {
 7689            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7690                s.move_with(|map, selection| {
 7691                    if selection.is_empty() {
 7692                        let cursor = movement::next_subword_end(map, selection.head());
 7693                        selection.set_head(cursor, SelectionGoal::None);
 7694                    }
 7695                });
 7696            });
 7697            this.insert("", cx);
 7698        });
 7699    }
 7700
 7701    pub fn move_to_beginning_of_line(
 7702        &mut self,
 7703        action: &MoveToBeginningOfLine,
 7704        cx: &mut ViewContext<Self>,
 7705    ) {
 7706        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7707            s.move_cursors_with(|map, head, _| {
 7708                (
 7709                    movement::indented_line_beginning(map, head, action.stop_at_soft_wraps),
 7710                    SelectionGoal::None,
 7711                )
 7712            });
 7713        })
 7714    }
 7715
 7716    pub fn select_to_beginning_of_line(
 7717        &mut self,
 7718        action: &SelectToBeginningOfLine,
 7719        cx: &mut ViewContext<Self>,
 7720    ) {
 7721        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7722            s.move_heads_with(|map, head, _| {
 7723                (
 7724                    movement::indented_line_beginning(map, head, action.stop_at_soft_wraps),
 7725                    SelectionGoal::None,
 7726                )
 7727            });
 7728        });
 7729    }
 7730
 7731    pub fn delete_to_beginning_of_line(
 7732        &mut self,
 7733        _: &DeleteToBeginningOfLine,
 7734        cx: &mut ViewContext<Self>,
 7735    ) {
 7736        self.transact(cx, |this, cx| {
 7737            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7738                s.move_with(|_, selection| {
 7739                    selection.reversed = true;
 7740                });
 7741            });
 7742
 7743            this.select_to_beginning_of_line(
 7744                &SelectToBeginningOfLine {
 7745                    stop_at_soft_wraps: false,
 7746                },
 7747                cx,
 7748            );
 7749            this.backspace(&Backspace, cx);
 7750        });
 7751    }
 7752
 7753    pub fn move_to_end_of_line(&mut self, action: &MoveToEndOfLine, cx: &mut ViewContext<Self>) {
 7754        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7755            s.move_cursors_with(|map, head, _| {
 7756                (
 7757                    movement::line_end(map, head, action.stop_at_soft_wraps),
 7758                    SelectionGoal::None,
 7759                )
 7760            });
 7761        })
 7762    }
 7763
 7764    pub fn select_to_end_of_line(
 7765        &mut self,
 7766        action: &SelectToEndOfLine,
 7767        cx: &mut ViewContext<Self>,
 7768    ) {
 7769        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7770            s.move_heads_with(|map, head, _| {
 7771                (
 7772                    movement::line_end(map, head, action.stop_at_soft_wraps),
 7773                    SelectionGoal::None,
 7774                )
 7775            });
 7776        })
 7777    }
 7778
 7779    pub fn delete_to_end_of_line(&mut self, _: &DeleteToEndOfLine, cx: &mut ViewContext<Self>) {
 7780        self.transact(cx, |this, cx| {
 7781            this.select_to_end_of_line(
 7782                &SelectToEndOfLine {
 7783                    stop_at_soft_wraps: false,
 7784                },
 7785                cx,
 7786            );
 7787            this.delete(&Delete, cx);
 7788        });
 7789    }
 7790
 7791    pub fn cut_to_end_of_line(&mut self, _: &CutToEndOfLine, cx: &mut ViewContext<Self>) {
 7792        self.transact(cx, |this, cx| {
 7793            this.select_to_end_of_line(
 7794                &SelectToEndOfLine {
 7795                    stop_at_soft_wraps: false,
 7796                },
 7797                cx,
 7798            );
 7799            this.cut(&Cut, cx);
 7800        });
 7801    }
 7802
 7803    pub fn move_to_start_of_paragraph(
 7804        &mut self,
 7805        _: &MoveToStartOfParagraph,
 7806        cx: &mut ViewContext<Self>,
 7807    ) {
 7808        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7809            cx.propagate();
 7810            return;
 7811        }
 7812
 7813        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7814            s.move_with(|map, selection| {
 7815                selection.collapse_to(
 7816                    movement::start_of_paragraph(map, selection.head(), 1),
 7817                    SelectionGoal::None,
 7818                )
 7819            });
 7820        })
 7821    }
 7822
 7823    pub fn move_to_end_of_paragraph(
 7824        &mut self,
 7825        _: &MoveToEndOfParagraph,
 7826        cx: &mut ViewContext<Self>,
 7827    ) {
 7828        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7829            cx.propagate();
 7830            return;
 7831        }
 7832
 7833        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7834            s.move_with(|map, selection| {
 7835                selection.collapse_to(
 7836                    movement::end_of_paragraph(map, selection.head(), 1),
 7837                    SelectionGoal::None,
 7838                )
 7839            });
 7840        })
 7841    }
 7842
 7843    pub fn select_to_start_of_paragraph(
 7844        &mut self,
 7845        _: &SelectToStartOfParagraph,
 7846        cx: &mut ViewContext<Self>,
 7847    ) {
 7848        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7849            cx.propagate();
 7850            return;
 7851        }
 7852
 7853        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7854            s.move_heads_with(|map, head, _| {
 7855                (
 7856                    movement::start_of_paragraph(map, head, 1),
 7857                    SelectionGoal::None,
 7858                )
 7859            });
 7860        })
 7861    }
 7862
 7863    pub fn select_to_end_of_paragraph(
 7864        &mut self,
 7865        _: &SelectToEndOfParagraph,
 7866        cx: &mut ViewContext<Self>,
 7867    ) {
 7868        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7869            cx.propagate();
 7870            return;
 7871        }
 7872
 7873        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7874            s.move_heads_with(|map, head, _| {
 7875                (
 7876                    movement::end_of_paragraph(map, head, 1),
 7877                    SelectionGoal::None,
 7878                )
 7879            });
 7880        })
 7881    }
 7882
 7883    pub fn move_to_beginning(&mut self, _: &MoveToBeginning, cx: &mut ViewContext<Self>) {
 7884        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7885            cx.propagate();
 7886            return;
 7887        }
 7888
 7889        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7890            s.select_ranges(vec![0..0]);
 7891        });
 7892    }
 7893
 7894    pub fn select_to_beginning(&mut self, _: &SelectToBeginning, cx: &mut ViewContext<Self>) {
 7895        let mut selection = self.selections.last::<Point>(cx);
 7896        selection.set_head(Point::zero(), SelectionGoal::None);
 7897
 7898        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7899            s.select(vec![selection]);
 7900        });
 7901    }
 7902
 7903    pub fn move_to_end(&mut self, _: &MoveToEnd, cx: &mut ViewContext<Self>) {
 7904        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7905            cx.propagate();
 7906            return;
 7907        }
 7908
 7909        let cursor = self.buffer.read(cx).read(cx).len();
 7910        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7911            s.select_ranges(vec![cursor..cursor])
 7912        });
 7913    }
 7914
 7915    pub fn set_nav_history(&mut self, nav_history: Option<ItemNavHistory>) {
 7916        self.nav_history = nav_history;
 7917    }
 7918
 7919    pub fn nav_history(&self) -> Option<&ItemNavHistory> {
 7920        self.nav_history.as_ref()
 7921    }
 7922
 7923    fn push_to_nav_history(
 7924        &mut self,
 7925        cursor_anchor: Anchor,
 7926        new_position: Option<Point>,
 7927        cx: &mut ViewContext<Self>,
 7928    ) {
 7929        if let Some(nav_history) = self.nav_history.as_mut() {
 7930            let buffer = self.buffer.read(cx).read(cx);
 7931            let cursor_position = cursor_anchor.to_point(&buffer);
 7932            let scroll_state = self.scroll_manager.anchor();
 7933            let scroll_top_row = scroll_state.top_row(&buffer);
 7934            drop(buffer);
 7935
 7936            if let Some(new_position) = new_position {
 7937                let row_delta = (new_position.row as i64 - cursor_position.row as i64).abs();
 7938                if row_delta < MIN_NAVIGATION_HISTORY_ROW_DELTA {
 7939                    return;
 7940                }
 7941            }
 7942
 7943            nav_history.push(
 7944                Some(NavigationData {
 7945                    cursor_anchor,
 7946                    cursor_position,
 7947                    scroll_anchor: scroll_state,
 7948                    scroll_top_row,
 7949                }),
 7950                cx,
 7951            );
 7952        }
 7953    }
 7954
 7955    pub fn select_to_end(&mut self, _: &SelectToEnd, cx: &mut ViewContext<Self>) {
 7956        let buffer = self.buffer.read(cx).snapshot(cx);
 7957        let mut selection = self.selections.first::<usize>(cx);
 7958        selection.set_head(buffer.len(), SelectionGoal::None);
 7959        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7960            s.select(vec![selection]);
 7961        });
 7962    }
 7963
 7964    pub fn select_all(&mut self, _: &SelectAll, cx: &mut ViewContext<Self>) {
 7965        let end = self.buffer.read(cx).read(cx).len();
 7966        self.change_selections(None, cx, |s| {
 7967            s.select_ranges(vec![0..end]);
 7968        });
 7969    }
 7970
 7971    pub fn select_line(&mut self, _: &SelectLine, cx: &mut ViewContext<Self>) {
 7972        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 7973        let mut selections = self.selections.all::<Point>(cx);
 7974        let max_point = display_map.buffer_snapshot.max_point();
 7975        for selection in &mut selections {
 7976            let rows = selection.spanned_rows(true, &display_map);
 7977            selection.start = Point::new(rows.start.0, 0);
 7978            selection.end = cmp::min(max_point, Point::new(rows.end.0, 0));
 7979            selection.reversed = false;
 7980        }
 7981        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7982            s.select(selections);
 7983        });
 7984    }
 7985
 7986    pub fn split_selection_into_lines(
 7987        &mut self,
 7988        _: &SplitSelectionIntoLines,
 7989        cx: &mut ViewContext<Self>,
 7990    ) {
 7991        let mut to_unfold = Vec::new();
 7992        let mut new_selection_ranges = Vec::new();
 7993        {
 7994            let selections = self.selections.all::<Point>(cx);
 7995            let buffer = self.buffer.read(cx).read(cx);
 7996            for selection in selections {
 7997                for row in selection.start.row..selection.end.row {
 7998                    let cursor = Point::new(row, buffer.line_len(MultiBufferRow(row)));
 7999                    new_selection_ranges.push(cursor..cursor);
 8000                }
 8001                new_selection_ranges.push(selection.end..selection.end);
 8002                to_unfold.push(selection.start..selection.end);
 8003            }
 8004        }
 8005        self.unfold_ranges(&to_unfold, true, true, cx);
 8006        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8007            s.select_ranges(new_selection_ranges);
 8008        });
 8009    }
 8010
 8011    pub fn add_selection_above(&mut self, _: &AddSelectionAbove, cx: &mut ViewContext<Self>) {
 8012        self.add_selection(true, cx);
 8013    }
 8014
 8015    pub fn add_selection_below(&mut self, _: &AddSelectionBelow, cx: &mut ViewContext<Self>) {
 8016        self.add_selection(false, cx);
 8017    }
 8018
 8019    fn add_selection(&mut self, above: bool, cx: &mut ViewContext<Self>) {
 8020        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 8021        let mut selections = self.selections.all::<Point>(cx);
 8022        let text_layout_details = self.text_layout_details(cx);
 8023        let mut state = self.add_selections_state.take().unwrap_or_else(|| {
 8024            let oldest_selection = selections.iter().min_by_key(|s| s.id).unwrap().clone();
 8025            let range = oldest_selection.display_range(&display_map).sorted();
 8026
 8027            let start_x = display_map.x_for_display_point(range.start, &text_layout_details);
 8028            let end_x = display_map.x_for_display_point(range.end, &text_layout_details);
 8029            let positions = start_x.min(end_x)..start_x.max(end_x);
 8030
 8031            selections.clear();
 8032            let mut stack = Vec::new();
 8033            for row in range.start.row().0..=range.end.row().0 {
 8034                if let Some(selection) = self.selections.build_columnar_selection(
 8035                    &display_map,
 8036                    DisplayRow(row),
 8037                    &positions,
 8038                    oldest_selection.reversed,
 8039                    &text_layout_details,
 8040                ) {
 8041                    stack.push(selection.id);
 8042                    selections.push(selection);
 8043                }
 8044            }
 8045
 8046            if above {
 8047                stack.reverse();
 8048            }
 8049
 8050            AddSelectionsState { above, stack }
 8051        });
 8052
 8053        let last_added_selection = *state.stack.last().unwrap();
 8054        let mut new_selections = Vec::new();
 8055        if above == state.above {
 8056            let end_row = if above {
 8057                DisplayRow(0)
 8058            } else {
 8059                display_map.max_point().row()
 8060            };
 8061
 8062            'outer: for selection in selections {
 8063                if selection.id == last_added_selection {
 8064                    let range = selection.display_range(&display_map).sorted();
 8065                    debug_assert_eq!(range.start.row(), range.end.row());
 8066                    let mut row = range.start.row();
 8067                    let positions =
 8068                        if let SelectionGoal::HorizontalRange { start, end } = selection.goal {
 8069                            px(start)..px(end)
 8070                        } else {
 8071                            let start_x =
 8072                                display_map.x_for_display_point(range.start, &text_layout_details);
 8073                            let end_x =
 8074                                display_map.x_for_display_point(range.end, &text_layout_details);
 8075                            start_x.min(end_x)..start_x.max(end_x)
 8076                        };
 8077
 8078                    while row != end_row {
 8079                        if above {
 8080                            row.0 -= 1;
 8081                        } else {
 8082                            row.0 += 1;
 8083                        }
 8084
 8085                        if let Some(new_selection) = self.selections.build_columnar_selection(
 8086                            &display_map,
 8087                            row,
 8088                            &positions,
 8089                            selection.reversed,
 8090                            &text_layout_details,
 8091                        ) {
 8092                            state.stack.push(new_selection.id);
 8093                            if above {
 8094                                new_selections.push(new_selection);
 8095                                new_selections.push(selection);
 8096                            } else {
 8097                                new_selections.push(selection);
 8098                                new_selections.push(new_selection);
 8099                            }
 8100
 8101                            continue 'outer;
 8102                        }
 8103                    }
 8104                }
 8105
 8106                new_selections.push(selection);
 8107            }
 8108        } else {
 8109            new_selections = selections;
 8110            new_selections.retain(|s| s.id != last_added_selection);
 8111            state.stack.pop();
 8112        }
 8113
 8114        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8115            s.select(new_selections);
 8116        });
 8117        if state.stack.len() > 1 {
 8118            self.add_selections_state = Some(state);
 8119        }
 8120    }
 8121
 8122    pub fn select_next_match_internal(
 8123        &mut self,
 8124        display_map: &DisplaySnapshot,
 8125        replace_newest: bool,
 8126        autoscroll: Option<Autoscroll>,
 8127        cx: &mut ViewContext<Self>,
 8128    ) -> Result<()> {
 8129        fn select_next_match_ranges(
 8130            this: &mut Editor,
 8131            range: Range<usize>,
 8132            replace_newest: bool,
 8133            auto_scroll: Option<Autoscroll>,
 8134            cx: &mut ViewContext<Editor>,
 8135        ) {
 8136            this.unfold_ranges(&[range.clone()], false, true, cx);
 8137            this.change_selections(auto_scroll, cx, |s| {
 8138                if replace_newest {
 8139                    s.delete(s.newest_anchor().id);
 8140                }
 8141                s.insert_range(range.clone());
 8142            });
 8143        }
 8144
 8145        let buffer = &display_map.buffer_snapshot;
 8146        let mut selections = self.selections.all::<usize>(cx);
 8147        if let Some(mut select_next_state) = self.select_next_state.take() {
 8148            let query = &select_next_state.query;
 8149            if !select_next_state.done {
 8150                let first_selection = selections.iter().min_by_key(|s| s.id).unwrap();
 8151                let last_selection = selections.iter().max_by_key(|s| s.id).unwrap();
 8152                let mut next_selected_range = None;
 8153
 8154                let bytes_after_last_selection =
 8155                    buffer.bytes_in_range(last_selection.end..buffer.len());
 8156                let bytes_before_first_selection = buffer.bytes_in_range(0..first_selection.start);
 8157                let query_matches = query
 8158                    .stream_find_iter(bytes_after_last_selection)
 8159                    .map(|result| (last_selection.end, result))
 8160                    .chain(
 8161                        query
 8162                            .stream_find_iter(bytes_before_first_selection)
 8163                            .map(|result| (0, result)),
 8164                    );
 8165
 8166                for (start_offset, query_match) in query_matches {
 8167                    let query_match = query_match.unwrap(); // can only fail due to I/O
 8168                    let offset_range =
 8169                        start_offset + query_match.start()..start_offset + query_match.end();
 8170                    let display_range = offset_range.start.to_display_point(display_map)
 8171                        ..offset_range.end.to_display_point(display_map);
 8172
 8173                    if !select_next_state.wordwise
 8174                        || (!movement::is_inside_word(display_map, display_range.start)
 8175                            && !movement::is_inside_word(display_map, display_range.end))
 8176                    {
 8177                        // TODO: This is n^2, because we might check all the selections
 8178                        if !selections
 8179                            .iter()
 8180                            .any(|selection| selection.range().overlaps(&offset_range))
 8181                        {
 8182                            next_selected_range = Some(offset_range);
 8183                            break;
 8184                        }
 8185                    }
 8186                }
 8187
 8188                if let Some(next_selected_range) = next_selected_range {
 8189                    select_next_match_ranges(
 8190                        self,
 8191                        next_selected_range,
 8192                        replace_newest,
 8193                        autoscroll,
 8194                        cx,
 8195                    );
 8196                } else {
 8197                    select_next_state.done = true;
 8198                }
 8199            }
 8200
 8201            self.select_next_state = Some(select_next_state);
 8202        } else {
 8203            let mut only_carets = true;
 8204            let mut same_text_selected = true;
 8205            let mut selected_text = None;
 8206
 8207            let mut selections_iter = selections.iter().peekable();
 8208            while let Some(selection) = selections_iter.next() {
 8209                if selection.start != selection.end {
 8210                    only_carets = false;
 8211                }
 8212
 8213                if same_text_selected {
 8214                    if selected_text.is_none() {
 8215                        selected_text =
 8216                            Some(buffer.text_for_range(selection.range()).collect::<String>());
 8217                    }
 8218
 8219                    if let Some(next_selection) = selections_iter.peek() {
 8220                        if next_selection.range().len() == selection.range().len() {
 8221                            let next_selected_text = buffer
 8222                                .text_for_range(next_selection.range())
 8223                                .collect::<String>();
 8224                            if Some(next_selected_text) != selected_text {
 8225                                same_text_selected = false;
 8226                                selected_text = None;
 8227                            }
 8228                        } else {
 8229                            same_text_selected = false;
 8230                            selected_text = None;
 8231                        }
 8232                    }
 8233                }
 8234            }
 8235
 8236            if only_carets {
 8237                for selection in &mut selections {
 8238                    let word_range = movement::surrounding_word(
 8239                        display_map,
 8240                        selection.start.to_display_point(display_map),
 8241                    );
 8242                    selection.start = word_range.start.to_offset(display_map, Bias::Left);
 8243                    selection.end = word_range.end.to_offset(display_map, Bias::Left);
 8244                    selection.goal = SelectionGoal::None;
 8245                    selection.reversed = false;
 8246                    select_next_match_ranges(
 8247                        self,
 8248                        selection.start..selection.end,
 8249                        replace_newest,
 8250                        autoscroll,
 8251                        cx,
 8252                    );
 8253                }
 8254
 8255                if selections.len() == 1 {
 8256                    let selection = selections
 8257                        .last()
 8258                        .expect("ensured that there's only one selection");
 8259                    let query = buffer
 8260                        .text_for_range(selection.start..selection.end)
 8261                        .collect::<String>();
 8262                    let is_empty = query.is_empty();
 8263                    let select_state = SelectNextState {
 8264                        query: AhoCorasick::new(&[query])?,
 8265                        wordwise: true,
 8266                        done: is_empty,
 8267                    };
 8268                    self.select_next_state = Some(select_state);
 8269                } else {
 8270                    self.select_next_state = None;
 8271                }
 8272            } else if let Some(selected_text) = selected_text {
 8273                self.select_next_state = Some(SelectNextState {
 8274                    query: AhoCorasick::new(&[selected_text])?,
 8275                    wordwise: false,
 8276                    done: false,
 8277                });
 8278                self.select_next_match_internal(display_map, replace_newest, autoscroll, cx)?;
 8279            }
 8280        }
 8281        Ok(())
 8282    }
 8283
 8284    pub fn select_all_matches(
 8285        &mut self,
 8286        _action: &SelectAllMatches,
 8287        cx: &mut ViewContext<Self>,
 8288    ) -> Result<()> {
 8289        self.push_to_selection_history();
 8290        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 8291
 8292        self.select_next_match_internal(&display_map, false, None, cx)?;
 8293        let Some(select_next_state) = self.select_next_state.as_mut() else {
 8294            return Ok(());
 8295        };
 8296        if select_next_state.done {
 8297            return Ok(());
 8298        }
 8299
 8300        let mut new_selections = self.selections.all::<usize>(cx);
 8301
 8302        let buffer = &display_map.buffer_snapshot;
 8303        let query_matches = select_next_state
 8304            .query
 8305            .stream_find_iter(buffer.bytes_in_range(0..buffer.len()));
 8306
 8307        for query_match in query_matches {
 8308            let query_match = query_match.unwrap(); // can only fail due to I/O
 8309            let offset_range = query_match.start()..query_match.end();
 8310            let display_range = offset_range.start.to_display_point(&display_map)
 8311                ..offset_range.end.to_display_point(&display_map);
 8312
 8313            if !select_next_state.wordwise
 8314                || (!movement::is_inside_word(&display_map, display_range.start)
 8315                    && !movement::is_inside_word(&display_map, display_range.end))
 8316            {
 8317                self.selections.change_with(cx, |selections| {
 8318                    new_selections.push(Selection {
 8319                        id: selections.new_selection_id(),
 8320                        start: offset_range.start,
 8321                        end: offset_range.end,
 8322                        reversed: false,
 8323                        goal: SelectionGoal::None,
 8324                    });
 8325                });
 8326            }
 8327        }
 8328
 8329        new_selections.sort_by_key(|selection| selection.start);
 8330        let mut ix = 0;
 8331        while ix + 1 < new_selections.len() {
 8332            let current_selection = &new_selections[ix];
 8333            let next_selection = &new_selections[ix + 1];
 8334            if current_selection.range().overlaps(&next_selection.range()) {
 8335                if current_selection.id < next_selection.id {
 8336                    new_selections.remove(ix + 1);
 8337                } else {
 8338                    new_selections.remove(ix);
 8339                }
 8340            } else {
 8341                ix += 1;
 8342            }
 8343        }
 8344
 8345        select_next_state.done = true;
 8346        self.unfold_ranges(
 8347            &new_selections
 8348                .iter()
 8349                .map(|selection| selection.range())
 8350                .collect::<Vec<_>>(),
 8351            false,
 8352            false,
 8353            cx,
 8354        );
 8355        self.change_selections(Some(Autoscroll::fit()), cx, |selections| {
 8356            selections.select(new_selections)
 8357        });
 8358
 8359        Ok(())
 8360    }
 8361
 8362    pub fn select_next(&mut self, action: &SelectNext, cx: &mut ViewContext<Self>) -> Result<()> {
 8363        self.push_to_selection_history();
 8364        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 8365        self.select_next_match_internal(
 8366            &display_map,
 8367            action.replace_newest,
 8368            Some(Autoscroll::newest()),
 8369            cx,
 8370        )?;
 8371        Ok(())
 8372    }
 8373
 8374    pub fn select_previous(
 8375        &mut self,
 8376        action: &SelectPrevious,
 8377        cx: &mut ViewContext<Self>,
 8378    ) -> Result<()> {
 8379        self.push_to_selection_history();
 8380        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 8381        let buffer = &display_map.buffer_snapshot;
 8382        let mut selections = self.selections.all::<usize>(cx);
 8383        if let Some(mut select_prev_state) = self.select_prev_state.take() {
 8384            let query = &select_prev_state.query;
 8385            if !select_prev_state.done {
 8386                let first_selection = selections.iter().min_by_key(|s| s.id).unwrap();
 8387                let last_selection = selections.iter().max_by_key(|s| s.id).unwrap();
 8388                let mut next_selected_range = None;
 8389                // When we're iterating matches backwards, the oldest match will actually be the furthest one in the buffer.
 8390                let bytes_before_last_selection =
 8391                    buffer.reversed_bytes_in_range(0..last_selection.start);
 8392                let bytes_after_first_selection =
 8393                    buffer.reversed_bytes_in_range(first_selection.end..buffer.len());
 8394                let query_matches = query
 8395                    .stream_find_iter(bytes_before_last_selection)
 8396                    .map(|result| (last_selection.start, result))
 8397                    .chain(
 8398                        query
 8399                            .stream_find_iter(bytes_after_first_selection)
 8400                            .map(|result| (buffer.len(), result)),
 8401                    );
 8402                for (end_offset, query_match) in query_matches {
 8403                    let query_match = query_match.unwrap(); // can only fail due to I/O
 8404                    let offset_range =
 8405                        end_offset - query_match.end()..end_offset - query_match.start();
 8406                    let display_range = offset_range.start.to_display_point(&display_map)
 8407                        ..offset_range.end.to_display_point(&display_map);
 8408
 8409                    if !select_prev_state.wordwise
 8410                        || (!movement::is_inside_word(&display_map, display_range.start)
 8411                            && !movement::is_inside_word(&display_map, display_range.end))
 8412                    {
 8413                        next_selected_range = Some(offset_range);
 8414                        break;
 8415                    }
 8416                }
 8417
 8418                if let Some(next_selected_range) = next_selected_range {
 8419                    self.unfold_ranges(&[next_selected_range.clone()], false, true, cx);
 8420                    self.change_selections(Some(Autoscroll::newest()), cx, |s| {
 8421                        if action.replace_newest {
 8422                            s.delete(s.newest_anchor().id);
 8423                        }
 8424                        s.insert_range(next_selected_range);
 8425                    });
 8426                } else {
 8427                    select_prev_state.done = true;
 8428                }
 8429            }
 8430
 8431            self.select_prev_state = Some(select_prev_state);
 8432        } else {
 8433            let mut only_carets = true;
 8434            let mut same_text_selected = true;
 8435            let mut selected_text = None;
 8436
 8437            let mut selections_iter = selections.iter().peekable();
 8438            while let Some(selection) = selections_iter.next() {
 8439                if selection.start != selection.end {
 8440                    only_carets = false;
 8441                }
 8442
 8443                if same_text_selected {
 8444                    if selected_text.is_none() {
 8445                        selected_text =
 8446                            Some(buffer.text_for_range(selection.range()).collect::<String>());
 8447                    }
 8448
 8449                    if let Some(next_selection) = selections_iter.peek() {
 8450                        if next_selection.range().len() == selection.range().len() {
 8451                            let next_selected_text = buffer
 8452                                .text_for_range(next_selection.range())
 8453                                .collect::<String>();
 8454                            if Some(next_selected_text) != selected_text {
 8455                                same_text_selected = false;
 8456                                selected_text = None;
 8457                            }
 8458                        } else {
 8459                            same_text_selected = false;
 8460                            selected_text = None;
 8461                        }
 8462                    }
 8463                }
 8464            }
 8465
 8466            if only_carets {
 8467                for selection in &mut selections {
 8468                    let word_range = movement::surrounding_word(
 8469                        &display_map,
 8470                        selection.start.to_display_point(&display_map),
 8471                    );
 8472                    selection.start = word_range.start.to_offset(&display_map, Bias::Left);
 8473                    selection.end = word_range.end.to_offset(&display_map, Bias::Left);
 8474                    selection.goal = SelectionGoal::None;
 8475                    selection.reversed = false;
 8476                }
 8477                if selections.len() == 1 {
 8478                    let selection = selections
 8479                        .last()
 8480                        .expect("ensured that there's only one selection");
 8481                    let query = buffer
 8482                        .text_for_range(selection.start..selection.end)
 8483                        .collect::<String>();
 8484                    let is_empty = query.is_empty();
 8485                    let select_state = SelectNextState {
 8486                        query: AhoCorasick::new(&[query.chars().rev().collect::<String>()])?,
 8487                        wordwise: true,
 8488                        done: is_empty,
 8489                    };
 8490                    self.select_prev_state = Some(select_state);
 8491                } else {
 8492                    self.select_prev_state = None;
 8493                }
 8494
 8495                self.unfold_ranges(
 8496                    &selections.iter().map(|s| s.range()).collect::<Vec<_>>(),
 8497                    false,
 8498                    true,
 8499                    cx,
 8500                );
 8501                self.change_selections(Some(Autoscroll::newest()), cx, |s| {
 8502                    s.select(selections);
 8503                });
 8504            } else if let Some(selected_text) = selected_text {
 8505                self.select_prev_state = Some(SelectNextState {
 8506                    query: AhoCorasick::new(&[selected_text.chars().rev().collect::<String>()])?,
 8507                    wordwise: false,
 8508                    done: false,
 8509                });
 8510                self.select_previous(action, cx)?;
 8511            }
 8512        }
 8513        Ok(())
 8514    }
 8515
 8516    pub fn toggle_comments(&mut self, action: &ToggleComments, cx: &mut ViewContext<Self>) {
 8517        if self.read_only(cx) {
 8518            return;
 8519        }
 8520        let text_layout_details = &self.text_layout_details(cx);
 8521        self.transact(cx, |this, cx| {
 8522            let mut selections = this.selections.all::<MultiBufferPoint>(cx);
 8523            let mut edits = Vec::new();
 8524            let mut selection_edit_ranges = Vec::new();
 8525            let mut last_toggled_row = None;
 8526            let snapshot = this.buffer.read(cx).read(cx);
 8527            let empty_str: Arc<str> = Arc::default();
 8528            let mut suffixes_inserted = Vec::new();
 8529            let ignore_indent = action.ignore_indent;
 8530
 8531            fn comment_prefix_range(
 8532                snapshot: &MultiBufferSnapshot,
 8533                row: MultiBufferRow,
 8534                comment_prefix: &str,
 8535                comment_prefix_whitespace: &str,
 8536                ignore_indent: bool,
 8537            ) -> Range<Point> {
 8538                let indent_size = if ignore_indent {
 8539                    0
 8540                } else {
 8541                    snapshot.indent_size_for_line(row).len
 8542                };
 8543
 8544                let start = Point::new(row.0, indent_size);
 8545
 8546                let mut line_bytes = snapshot
 8547                    .bytes_in_range(start..snapshot.max_point())
 8548                    .flatten()
 8549                    .copied();
 8550
 8551                // If this line currently begins with the line comment prefix, then record
 8552                // the range containing the prefix.
 8553                if line_bytes
 8554                    .by_ref()
 8555                    .take(comment_prefix.len())
 8556                    .eq(comment_prefix.bytes())
 8557                {
 8558                    // Include any whitespace that matches the comment prefix.
 8559                    let matching_whitespace_len = line_bytes
 8560                        .zip(comment_prefix_whitespace.bytes())
 8561                        .take_while(|(a, b)| a == b)
 8562                        .count() as u32;
 8563                    let end = Point::new(
 8564                        start.row,
 8565                        start.column + comment_prefix.len() as u32 + matching_whitespace_len,
 8566                    );
 8567                    start..end
 8568                } else {
 8569                    start..start
 8570                }
 8571            }
 8572
 8573            fn comment_suffix_range(
 8574                snapshot: &MultiBufferSnapshot,
 8575                row: MultiBufferRow,
 8576                comment_suffix: &str,
 8577                comment_suffix_has_leading_space: bool,
 8578            ) -> Range<Point> {
 8579                let end = Point::new(row.0, snapshot.line_len(row));
 8580                let suffix_start_column = end.column.saturating_sub(comment_suffix.len() as u32);
 8581
 8582                let mut line_end_bytes = snapshot
 8583                    .bytes_in_range(Point::new(end.row, suffix_start_column.saturating_sub(1))..end)
 8584                    .flatten()
 8585                    .copied();
 8586
 8587                let leading_space_len = if suffix_start_column > 0
 8588                    && line_end_bytes.next() == Some(b' ')
 8589                    && comment_suffix_has_leading_space
 8590                {
 8591                    1
 8592                } else {
 8593                    0
 8594                };
 8595
 8596                // If this line currently begins with the line comment prefix, then record
 8597                // the range containing the prefix.
 8598                if line_end_bytes.by_ref().eq(comment_suffix.bytes()) {
 8599                    let start = Point::new(end.row, suffix_start_column - leading_space_len);
 8600                    start..end
 8601                } else {
 8602                    end..end
 8603                }
 8604            }
 8605
 8606            // TODO: Handle selections that cross excerpts
 8607            for selection in &mut selections {
 8608                let start_column = snapshot
 8609                    .indent_size_for_line(MultiBufferRow(selection.start.row))
 8610                    .len;
 8611                let language = if let Some(language) =
 8612                    snapshot.language_scope_at(Point::new(selection.start.row, start_column))
 8613                {
 8614                    language
 8615                } else {
 8616                    continue;
 8617                };
 8618
 8619                selection_edit_ranges.clear();
 8620
 8621                // If multiple selections contain a given row, avoid processing that
 8622                // row more than once.
 8623                let mut start_row = MultiBufferRow(selection.start.row);
 8624                if last_toggled_row == Some(start_row) {
 8625                    start_row = start_row.next_row();
 8626                }
 8627                let end_row =
 8628                    if selection.end.row > selection.start.row && selection.end.column == 0 {
 8629                        MultiBufferRow(selection.end.row - 1)
 8630                    } else {
 8631                        MultiBufferRow(selection.end.row)
 8632                    };
 8633                last_toggled_row = Some(end_row);
 8634
 8635                if start_row > end_row {
 8636                    continue;
 8637                }
 8638
 8639                // If the language has line comments, toggle those.
 8640                let mut full_comment_prefixes = language.line_comment_prefixes().to_vec();
 8641
 8642                // If ignore_indent is set, trim spaces from the right side of all full_comment_prefixes
 8643                if ignore_indent {
 8644                    full_comment_prefixes = full_comment_prefixes
 8645                        .into_iter()
 8646                        .map(|s| Arc::from(s.trim_end()))
 8647                        .collect();
 8648                }
 8649
 8650                if !full_comment_prefixes.is_empty() {
 8651                    let first_prefix = full_comment_prefixes
 8652                        .first()
 8653                        .expect("prefixes is non-empty");
 8654                    let prefix_trimmed_lengths = full_comment_prefixes
 8655                        .iter()
 8656                        .map(|p| p.trim_end_matches(' ').len())
 8657                        .collect::<SmallVec<[usize; 4]>>();
 8658
 8659                    let mut all_selection_lines_are_comments = true;
 8660
 8661                    for row in start_row.0..=end_row.0 {
 8662                        let row = MultiBufferRow(row);
 8663                        if start_row < end_row && snapshot.is_line_blank(row) {
 8664                            continue;
 8665                        }
 8666
 8667                        let prefix_range = full_comment_prefixes
 8668                            .iter()
 8669                            .zip(prefix_trimmed_lengths.iter().copied())
 8670                            .map(|(prefix, trimmed_prefix_len)| {
 8671                                comment_prefix_range(
 8672                                    snapshot.deref(),
 8673                                    row,
 8674                                    &prefix[..trimmed_prefix_len],
 8675                                    &prefix[trimmed_prefix_len..],
 8676                                    ignore_indent,
 8677                                )
 8678                            })
 8679                            .max_by_key(|range| range.end.column - range.start.column)
 8680                            .expect("prefixes is non-empty");
 8681
 8682                        if prefix_range.is_empty() {
 8683                            all_selection_lines_are_comments = false;
 8684                        }
 8685
 8686                        selection_edit_ranges.push(prefix_range);
 8687                    }
 8688
 8689                    if all_selection_lines_are_comments {
 8690                        edits.extend(
 8691                            selection_edit_ranges
 8692                                .iter()
 8693                                .cloned()
 8694                                .map(|range| (range, empty_str.clone())),
 8695                        );
 8696                    } else {
 8697                        let min_column = selection_edit_ranges
 8698                            .iter()
 8699                            .map(|range| range.start.column)
 8700                            .min()
 8701                            .unwrap_or(0);
 8702                        edits.extend(selection_edit_ranges.iter().map(|range| {
 8703                            let position = Point::new(range.start.row, min_column);
 8704                            (position..position, first_prefix.clone())
 8705                        }));
 8706                    }
 8707                } else if let Some((full_comment_prefix, comment_suffix)) =
 8708                    language.block_comment_delimiters()
 8709                {
 8710                    let comment_prefix = full_comment_prefix.trim_end_matches(' ');
 8711                    let comment_prefix_whitespace = &full_comment_prefix[comment_prefix.len()..];
 8712                    let prefix_range = comment_prefix_range(
 8713                        snapshot.deref(),
 8714                        start_row,
 8715                        comment_prefix,
 8716                        comment_prefix_whitespace,
 8717                        ignore_indent,
 8718                    );
 8719                    let suffix_range = comment_suffix_range(
 8720                        snapshot.deref(),
 8721                        end_row,
 8722                        comment_suffix.trim_start_matches(' '),
 8723                        comment_suffix.starts_with(' '),
 8724                    );
 8725
 8726                    if prefix_range.is_empty() || suffix_range.is_empty() {
 8727                        edits.push((
 8728                            prefix_range.start..prefix_range.start,
 8729                            full_comment_prefix.clone(),
 8730                        ));
 8731                        edits.push((suffix_range.end..suffix_range.end, comment_suffix.clone()));
 8732                        suffixes_inserted.push((end_row, comment_suffix.len()));
 8733                    } else {
 8734                        edits.push((prefix_range, empty_str.clone()));
 8735                        edits.push((suffix_range, empty_str.clone()));
 8736                    }
 8737                } else {
 8738                    continue;
 8739                }
 8740            }
 8741
 8742            drop(snapshot);
 8743            this.buffer.update(cx, |buffer, cx| {
 8744                buffer.edit(edits, None, cx);
 8745            });
 8746
 8747            // Adjust selections so that they end before any comment suffixes that
 8748            // were inserted.
 8749            let mut suffixes_inserted = suffixes_inserted.into_iter().peekable();
 8750            let mut selections = this.selections.all::<Point>(cx);
 8751            let snapshot = this.buffer.read(cx).read(cx);
 8752            for selection in &mut selections {
 8753                while let Some((row, suffix_len)) = suffixes_inserted.peek().copied() {
 8754                    match row.cmp(&MultiBufferRow(selection.end.row)) {
 8755                        Ordering::Less => {
 8756                            suffixes_inserted.next();
 8757                            continue;
 8758                        }
 8759                        Ordering::Greater => break,
 8760                        Ordering::Equal => {
 8761                            if selection.end.column == snapshot.line_len(row) {
 8762                                if selection.is_empty() {
 8763                                    selection.start.column -= suffix_len as u32;
 8764                                }
 8765                                selection.end.column -= suffix_len as u32;
 8766                            }
 8767                            break;
 8768                        }
 8769                    }
 8770                }
 8771            }
 8772
 8773            drop(snapshot);
 8774            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 8775
 8776            let selections = this.selections.all::<Point>(cx);
 8777            let selections_on_single_row = selections.windows(2).all(|selections| {
 8778                selections[0].start.row == selections[1].start.row
 8779                    && selections[0].end.row == selections[1].end.row
 8780                    && selections[0].start.row == selections[0].end.row
 8781            });
 8782            let selections_selecting = selections
 8783                .iter()
 8784                .any(|selection| selection.start != selection.end);
 8785            let advance_downwards = action.advance_downwards
 8786                && selections_on_single_row
 8787                && !selections_selecting
 8788                && !matches!(this.mode, EditorMode::SingleLine { .. });
 8789
 8790            if advance_downwards {
 8791                let snapshot = this.buffer.read(cx).snapshot(cx);
 8792
 8793                this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8794                    s.move_cursors_with(|display_snapshot, display_point, _| {
 8795                        let mut point = display_point.to_point(display_snapshot);
 8796                        point.row += 1;
 8797                        point = snapshot.clip_point(point, Bias::Left);
 8798                        let display_point = point.to_display_point(display_snapshot);
 8799                        let goal = SelectionGoal::HorizontalPosition(
 8800                            display_snapshot
 8801                                .x_for_display_point(display_point, text_layout_details)
 8802                                .into(),
 8803                        );
 8804                        (display_point, goal)
 8805                    })
 8806                });
 8807            }
 8808        });
 8809    }
 8810
 8811    pub fn select_enclosing_symbol(
 8812        &mut self,
 8813        _: &SelectEnclosingSymbol,
 8814        cx: &mut ViewContext<Self>,
 8815    ) {
 8816        let buffer = self.buffer.read(cx).snapshot(cx);
 8817        let old_selections = self.selections.all::<usize>(cx).into_boxed_slice();
 8818
 8819        fn update_selection(
 8820            selection: &Selection<usize>,
 8821            buffer_snap: &MultiBufferSnapshot,
 8822        ) -> Option<Selection<usize>> {
 8823            let cursor = selection.head();
 8824            let (_buffer_id, symbols) = buffer_snap.symbols_containing(cursor, None)?;
 8825            for symbol in symbols.iter().rev() {
 8826                let start = symbol.range.start.to_offset(buffer_snap);
 8827                let end = symbol.range.end.to_offset(buffer_snap);
 8828                let new_range = start..end;
 8829                if start < selection.start || end > selection.end {
 8830                    return Some(Selection {
 8831                        id: selection.id,
 8832                        start: new_range.start,
 8833                        end: new_range.end,
 8834                        goal: SelectionGoal::None,
 8835                        reversed: selection.reversed,
 8836                    });
 8837                }
 8838            }
 8839            None
 8840        }
 8841
 8842        let mut selected_larger_symbol = false;
 8843        let new_selections = old_selections
 8844            .iter()
 8845            .map(|selection| match update_selection(selection, &buffer) {
 8846                Some(new_selection) => {
 8847                    if new_selection.range() != selection.range() {
 8848                        selected_larger_symbol = true;
 8849                    }
 8850                    new_selection
 8851                }
 8852                None => selection.clone(),
 8853            })
 8854            .collect::<Vec<_>>();
 8855
 8856        if selected_larger_symbol {
 8857            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8858                s.select(new_selections);
 8859            });
 8860        }
 8861    }
 8862
 8863    pub fn select_larger_syntax_node(
 8864        &mut self,
 8865        _: &SelectLargerSyntaxNode,
 8866        cx: &mut ViewContext<Self>,
 8867    ) {
 8868        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 8869        let buffer = self.buffer.read(cx).snapshot(cx);
 8870        let old_selections = self.selections.all::<usize>(cx).into_boxed_slice();
 8871
 8872        let mut stack = mem::take(&mut self.select_larger_syntax_node_stack);
 8873        let mut selected_larger_node = false;
 8874        let new_selections = old_selections
 8875            .iter()
 8876            .map(|selection| {
 8877                let old_range = selection.start..selection.end;
 8878                let mut new_range = old_range.clone();
 8879                let mut new_node = None;
 8880                while let Some((node, containing_range)) = buffer.syntax_ancestor(new_range.clone())
 8881                {
 8882                    new_node = Some(node);
 8883                    new_range = containing_range;
 8884                    if !display_map.intersects_fold(new_range.start)
 8885                        && !display_map.intersects_fold(new_range.end)
 8886                    {
 8887                        break;
 8888                    }
 8889                }
 8890
 8891                if let Some(node) = new_node {
 8892                    // Log the ancestor, to support using this action as a way to explore TreeSitter
 8893                    // nodes. Parent and grandparent are also logged because this operation will not
 8894                    // visit nodes that have the same range as their parent.
 8895                    log::info!("Node: {node:?}");
 8896                    let parent = node.parent();
 8897                    log::info!("Parent: {parent:?}");
 8898                    let grandparent = parent.and_then(|x| x.parent());
 8899                    log::info!("Grandparent: {grandparent:?}");
 8900                }
 8901
 8902                selected_larger_node |= new_range != old_range;
 8903                Selection {
 8904                    id: selection.id,
 8905                    start: new_range.start,
 8906                    end: new_range.end,
 8907                    goal: SelectionGoal::None,
 8908                    reversed: selection.reversed,
 8909                }
 8910            })
 8911            .collect::<Vec<_>>();
 8912
 8913        if selected_larger_node {
 8914            stack.push(old_selections);
 8915            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8916                s.select(new_selections);
 8917            });
 8918        }
 8919        self.select_larger_syntax_node_stack = stack;
 8920    }
 8921
 8922    pub fn select_smaller_syntax_node(
 8923        &mut self,
 8924        _: &SelectSmallerSyntaxNode,
 8925        cx: &mut ViewContext<Self>,
 8926    ) {
 8927        let mut stack = mem::take(&mut self.select_larger_syntax_node_stack);
 8928        if let Some(selections) = stack.pop() {
 8929            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8930                s.select(selections.to_vec());
 8931            });
 8932        }
 8933        self.select_larger_syntax_node_stack = stack;
 8934    }
 8935
 8936    fn refresh_runnables(&mut self, cx: &mut ViewContext<Self>) -> Task<()> {
 8937        if !EditorSettings::get_global(cx).gutter.runnables {
 8938            self.clear_tasks();
 8939            return Task::ready(());
 8940        }
 8941        let project = self.project.as_ref().map(Model::downgrade);
 8942        cx.spawn(|this, mut cx| async move {
 8943            cx.background_executor().timer(UPDATE_DEBOUNCE).await;
 8944            let Some(project) = project.and_then(|p| p.upgrade()) else {
 8945                return;
 8946            };
 8947            let Ok(display_snapshot) = this.update(&mut cx, |this, cx| {
 8948                this.display_map.update(cx, |map, cx| map.snapshot(cx))
 8949            }) else {
 8950                return;
 8951            };
 8952
 8953            let hide_runnables = project
 8954                .update(&mut cx, |project, cx| {
 8955                    // Do not display any test indicators in non-dev server remote projects.
 8956                    project.is_via_collab() && project.ssh_connection_string(cx).is_none()
 8957                })
 8958                .unwrap_or(true);
 8959            if hide_runnables {
 8960                return;
 8961            }
 8962            let new_rows =
 8963                cx.background_executor()
 8964                    .spawn({
 8965                        let snapshot = display_snapshot.clone();
 8966                        async move {
 8967                            Self::fetch_runnable_ranges(&snapshot, Anchor::min()..Anchor::max())
 8968                        }
 8969                    })
 8970                    .await;
 8971            let rows = Self::runnable_rows(project, display_snapshot, new_rows, cx.clone());
 8972
 8973            this.update(&mut cx, |this, _| {
 8974                this.clear_tasks();
 8975                for (key, value) in rows {
 8976                    this.insert_tasks(key, value);
 8977                }
 8978            })
 8979            .ok();
 8980        })
 8981    }
 8982    fn fetch_runnable_ranges(
 8983        snapshot: &DisplaySnapshot,
 8984        range: Range<Anchor>,
 8985    ) -> Vec<language::RunnableRange> {
 8986        snapshot.buffer_snapshot.runnable_ranges(range).collect()
 8987    }
 8988
 8989    fn runnable_rows(
 8990        project: Model<Project>,
 8991        snapshot: DisplaySnapshot,
 8992        runnable_ranges: Vec<RunnableRange>,
 8993        mut cx: AsyncWindowContext,
 8994    ) -> Vec<((BufferId, u32), RunnableTasks)> {
 8995        runnable_ranges
 8996            .into_iter()
 8997            .filter_map(|mut runnable| {
 8998                let tasks = cx
 8999                    .update(|cx| Self::templates_with_tags(&project, &mut runnable.runnable, cx))
 9000                    .ok()?;
 9001                if tasks.is_empty() {
 9002                    return None;
 9003                }
 9004
 9005                let point = runnable.run_range.start.to_point(&snapshot.buffer_snapshot);
 9006
 9007                let row = snapshot
 9008                    .buffer_snapshot
 9009                    .buffer_line_for_row(MultiBufferRow(point.row))?
 9010                    .1
 9011                    .start
 9012                    .row;
 9013
 9014                let context_range =
 9015                    BufferOffset(runnable.full_range.start)..BufferOffset(runnable.full_range.end);
 9016                Some((
 9017                    (runnable.buffer_id, row),
 9018                    RunnableTasks {
 9019                        templates: tasks,
 9020                        offset: MultiBufferOffset(runnable.run_range.start),
 9021                        context_range,
 9022                        column: point.column,
 9023                        extra_variables: runnable.extra_captures,
 9024                    },
 9025                ))
 9026            })
 9027            .collect()
 9028    }
 9029
 9030    fn templates_with_tags(
 9031        project: &Model<Project>,
 9032        runnable: &mut Runnable,
 9033        cx: &WindowContext,
 9034    ) -> Vec<(TaskSourceKind, TaskTemplate)> {
 9035        let (inventory, worktree_id, file) = project.read_with(cx, |project, cx| {
 9036            let (worktree_id, file) = project
 9037                .buffer_for_id(runnable.buffer, cx)
 9038                .and_then(|buffer| buffer.read(cx).file())
 9039                .map(|file| (file.worktree_id(cx), file.clone()))
 9040                .unzip();
 9041
 9042            (
 9043                project.task_store().read(cx).task_inventory().cloned(),
 9044                worktree_id,
 9045                file,
 9046            )
 9047        });
 9048
 9049        let tags = mem::take(&mut runnable.tags);
 9050        let mut tags: Vec<_> = tags
 9051            .into_iter()
 9052            .flat_map(|tag| {
 9053                let tag = tag.0.clone();
 9054                inventory
 9055                    .as_ref()
 9056                    .into_iter()
 9057                    .flat_map(|inventory| {
 9058                        inventory.read(cx).list_tasks(
 9059                            file.clone(),
 9060                            Some(runnable.language.clone()),
 9061                            worktree_id,
 9062                            cx,
 9063                        )
 9064                    })
 9065                    .filter(move |(_, template)| {
 9066                        template.tags.iter().any(|source_tag| source_tag == &tag)
 9067                    })
 9068            })
 9069            .sorted_by_key(|(kind, _)| kind.to_owned())
 9070            .collect();
 9071        if let Some((leading_tag_source, _)) = tags.first() {
 9072            // Strongest source wins; if we have worktree tag binding, prefer that to
 9073            // global and language bindings;
 9074            // if we have a global binding, prefer that to language binding.
 9075            let first_mismatch = tags
 9076                .iter()
 9077                .position(|(tag_source, _)| tag_source != leading_tag_source);
 9078            if let Some(index) = first_mismatch {
 9079                tags.truncate(index);
 9080            }
 9081        }
 9082
 9083        tags
 9084    }
 9085
 9086    pub fn move_to_enclosing_bracket(
 9087        &mut self,
 9088        _: &MoveToEnclosingBracket,
 9089        cx: &mut ViewContext<Self>,
 9090    ) {
 9091        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9092            s.move_offsets_with(|snapshot, selection| {
 9093                let Some(enclosing_bracket_ranges) =
 9094                    snapshot.enclosing_bracket_ranges(selection.start..selection.end)
 9095                else {
 9096                    return;
 9097                };
 9098
 9099                let mut best_length = usize::MAX;
 9100                let mut best_inside = false;
 9101                let mut best_in_bracket_range = false;
 9102                let mut best_destination = None;
 9103                for (open, close) in enclosing_bracket_ranges {
 9104                    let close = close.to_inclusive();
 9105                    let length = close.end() - open.start;
 9106                    let inside = selection.start >= open.end && selection.end <= *close.start();
 9107                    let in_bracket_range = open.to_inclusive().contains(&selection.head())
 9108                        || close.contains(&selection.head());
 9109
 9110                    // If best is next to a bracket and current isn't, skip
 9111                    if !in_bracket_range && best_in_bracket_range {
 9112                        continue;
 9113                    }
 9114
 9115                    // Prefer smaller lengths unless best is inside and current isn't
 9116                    if length > best_length && (best_inside || !inside) {
 9117                        continue;
 9118                    }
 9119
 9120                    best_length = length;
 9121                    best_inside = inside;
 9122                    best_in_bracket_range = in_bracket_range;
 9123                    best_destination = Some(
 9124                        if close.contains(&selection.start) && close.contains(&selection.end) {
 9125                            if inside {
 9126                                open.end
 9127                            } else {
 9128                                open.start
 9129                            }
 9130                        } else if inside {
 9131                            *close.start()
 9132                        } else {
 9133                            *close.end()
 9134                        },
 9135                    );
 9136                }
 9137
 9138                if let Some(destination) = best_destination {
 9139                    selection.collapse_to(destination, SelectionGoal::None);
 9140                }
 9141            })
 9142        });
 9143    }
 9144
 9145    pub fn undo_selection(&mut self, _: &UndoSelection, cx: &mut ViewContext<Self>) {
 9146        self.end_selection(cx);
 9147        self.selection_history.mode = SelectionHistoryMode::Undoing;
 9148        if let Some(entry) = self.selection_history.undo_stack.pop_back() {
 9149            self.change_selections(None, cx, |s| s.select_anchors(entry.selections.to_vec()));
 9150            self.select_next_state = entry.select_next_state;
 9151            self.select_prev_state = entry.select_prev_state;
 9152            self.add_selections_state = entry.add_selections_state;
 9153            self.request_autoscroll(Autoscroll::newest(), cx);
 9154        }
 9155        self.selection_history.mode = SelectionHistoryMode::Normal;
 9156    }
 9157
 9158    pub fn redo_selection(&mut self, _: &RedoSelection, cx: &mut ViewContext<Self>) {
 9159        self.end_selection(cx);
 9160        self.selection_history.mode = SelectionHistoryMode::Redoing;
 9161        if let Some(entry) = self.selection_history.redo_stack.pop_back() {
 9162            self.change_selections(None, cx, |s| s.select_anchors(entry.selections.to_vec()));
 9163            self.select_next_state = entry.select_next_state;
 9164            self.select_prev_state = entry.select_prev_state;
 9165            self.add_selections_state = entry.add_selections_state;
 9166            self.request_autoscroll(Autoscroll::newest(), cx);
 9167        }
 9168        self.selection_history.mode = SelectionHistoryMode::Normal;
 9169    }
 9170
 9171    pub fn expand_excerpts(&mut self, action: &ExpandExcerpts, cx: &mut ViewContext<Self>) {
 9172        self.expand_excerpts_for_direction(action.lines, ExpandExcerptDirection::UpAndDown, cx)
 9173    }
 9174
 9175    pub fn expand_excerpts_down(
 9176        &mut self,
 9177        action: &ExpandExcerptsDown,
 9178        cx: &mut ViewContext<Self>,
 9179    ) {
 9180        self.expand_excerpts_for_direction(action.lines, ExpandExcerptDirection::Down, cx)
 9181    }
 9182
 9183    pub fn expand_excerpts_up(&mut self, action: &ExpandExcerptsUp, cx: &mut ViewContext<Self>) {
 9184        self.expand_excerpts_for_direction(action.lines, ExpandExcerptDirection::Up, cx)
 9185    }
 9186
 9187    pub fn expand_excerpts_for_direction(
 9188        &mut self,
 9189        lines: u32,
 9190        direction: ExpandExcerptDirection,
 9191        cx: &mut ViewContext<Self>,
 9192    ) {
 9193        let selections = self.selections.disjoint_anchors();
 9194
 9195        let lines = if lines == 0 {
 9196            EditorSettings::get_global(cx).expand_excerpt_lines
 9197        } else {
 9198            lines
 9199        };
 9200
 9201        self.buffer.update(cx, |buffer, cx| {
 9202            let snapshot = buffer.snapshot(cx);
 9203            let mut excerpt_ids = selections
 9204                .iter()
 9205                .flat_map(|selection| {
 9206                    snapshot
 9207                        .excerpts_for_range(selection.range())
 9208                        .map(|excerpt| excerpt.id())
 9209                })
 9210                .collect::<Vec<_>>();
 9211            excerpt_ids.sort();
 9212            excerpt_ids.dedup();
 9213            buffer.expand_excerpts(excerpt_ids, lines, direction, cx)
 9214        })
 9215    }
 9216
 9217    pub fn expand_excerpt(
 9218        &mut self,
 9219        excerpt: ExcerptId,
 9220        direction: ExpandExcerptDirection,
 9221        cx: &mut ViewContext<Self>,
 9222    ) {
 9223        let lines = EditorSettings::get_global(cx).expand_excerpt_lines;
 9224        self.buffer.update(cx, |buffer, cx| {
 9225            buffer.expand_excerpts([excerpt], lines, direction, cx)
 9226        })
 9227    }
 9228
 9229    fn go_to_diagnostic(&mut self, _: &GoToDiagnostic, cx: &mut ViewContext<Self>) {
 9230        self.go_to_diagnostic_impl(Direction::Next, cx)
 9231    }
 9232
 9233    fn go_to_prev_diagnostic(&mut self, _: &GoToPrevDiagnostic, cx: &mut ViewContext<Self>) {
 9234        self.go_to_diagnostic_impl(Direction::Prev, cx)
 9235    }
 9236
 9237    pub fn go_to_diagnostic_impl(&mut self, direction: Direction, cx: &mut ViewContext<Self>) {
 9238        let buffer = self.buffer.read(cx).snapshot(cx);
 9239        let selection = self.selections.newest::<usize>(cx);
 9240
 9241        // If there is an active Diagnostic Popover jump to its diagnostic instead.
 9242        if direction == Direction::Next {
 9243            if let Some(popover) = self.hover_state.diagnostic_popover.as_ref() {
 9244                self.activate_diagnostics(popover.group_id(), cx);
 9245                if let Some(active_diagnostics) = self.active_diagnostics.as_ref() {
 9246                    let primary_range_start = active_diagnostics.primary_range.start;
 9247                    self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9248                        let mut new_selection = s.newest_anchor().clone();
 9249                        new_selection.collapse_to(primary_range_start, SelectionGoal::None);
 9250                        s.select_anchors(vec![new_selection.clone()]);
 9251                    });
 9252                }
 9253                return;
 9254            }
 9255        }
 9256
 9257        let mut active_primary_range = self.active_diagnostics.as_ref().map(|active_diagnostics| {
 9258            active_diagnostics
 9259                .primary_range
 9260                .to_offset(&buffer)
 9261                .to_inclusive()
 9262        });
 9263        let mut search_start = if let Some(active_primary_range) = active_primary_range.as_ref() {
 9264            if active_primary_range.contains(&selection.head()) {
 9265                *active_primary_range.start()
 9266            } else {
 9267                selection.head()
 9268            }
 9269        } else {
 9270            selection.head()
 9271        };
 9272        let snapshot = self.snapshot(cx);
 9273        loop {
 9274            let diagnostics = if direction == Direction::Prev {
 9275                buffer.diagnostics_in_range(0..search_start, true)
 9276            } else {
 9277                buffer.diagnostics_in_range(search_start..buffer.len(), false)
 9278            }
 9279            .filter(|diagnostic| !snapshot.intersects_fold(diagnostic.range.start));
 9280            let search_start_anchor = buffer.anchor_after(search_start);
 9281            let group = diagnostics
 9282                // relies on diagnostics_in_range to return diagnostics with the same starting range to
 9283                // be sorted in a stable way
 9284                // skip until we are at current active diagnostic, if it exists
 9285                .skip_while(|entry| {
 9286                    let is_in_range = match direction {
 9287                        Direction::Prev => {
 9288                            entry.range.start.cmp(&search_start_anchor, &buffer).is_ge()
 9289                        }
 9290                        Direction::Next => {
 9291                            entry.range.start.cmp(&search_start_anchor, &buffer).is_le()
 9292                        }
 9293                    };
 9294                    is_in_range
 9295                        && self
 9296                            .active_diagnostics
 9297                            .as_ref()
 9298                            .is_some_and(|a| a.group_id != entry.diagnostic.group_id)
 9299                })
 9300                .find_map(|entry| {
 9301                    if entry.diagnostic.is_primary
 9302                        && entry.diagnostic.severity <= DiagnosticSeverity::WARNING
 9303                        && !(entry.range.start == entry.range.end)
 9304                        // if we match with the active diagnostic, skip it
 9305                        && Some(entry.diagnostic.group_id)
 9306                            != self.active_diagnostics.as_ref().map(|d| d.group_id)
 9307                    {
 9308                        Some((entry.range, entry.diagnostic.group_id))
 9309                    } else {
 9310                        None
 9311                    }
 9312                });
 9313
 9314            if let Some((primary_range, group_id)) = group {
 9315                self.activate_diagnostics(group_id, cx);
 9316                let primary_range = primary_range.to_offset(&buffer);
 9317                if self.active_diagnostics.is_some() {
 9318                    self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9319                        s.select(vec![Selection {
 9320                            id: selection.id,
 9321                            start: primary_range.start,
 9322                            end: primary_range.start,
 9323                            reversed: false,
 9324                            goal: SelectionGoal::None,
 9325                        }]);
 9326                    });
 9327                }
 9328                break;
 9329            } else {
 9330                // Cycle around to the start of the buffer, potentially moving back to the start of
 9331                // the currently active diagnostic.
 9332                active_primary_range.take();
 9333                if direction == Direction::Prev {
 9334                    if search_start == buffer.len() {
 9335                        break;
 9336                    } else {
 9337                        search_start = buffer.len();
 9338                    }
 9339                } else if search_start == 0 {
 9340                    break;
 9341                } else {
 9342                    search_start = 0;
 9343                }
 9344            }
 9345        }
 9346    }
 9347
 9348    fn go_to_next_hunk(&mut self, _: &GoToHunk, cx: &mut ViewContext<Self>) {
 9349        let snapshot = self.snapshot(cx);
 9350        let selection = self.selections.newest::<Point>(cx);
 9351        self.go_to_hunk_after_position(&snapshot, selection.head(), cx);
 9352    }
 9353
 9354    fn go_to_hunk_after_position(
 9355        &mut self,
 9356        snapshot: &EditorSnapshot,
 9357        position: Point,
 9358        cx: &mut ViewContext<Editor>,
 9359    ) -> Option<MultiBufferDiffHunk> {
 9360        for (ix, position) in [position, Point::zero()].into_iter().enumerate() {
 9361            if let Some(hunk) = self.go_to_next_hunk_in_direction(
 9362                snapshot,
 9363                position,
 9364                ix > 0,
 9365                snapshot.diff_map.diff_hunks_in_range(
 9366                    position + Point::new(1, 0)..snapshot.buffer_snapshot.max_point(),
 9367                    &snapshot.buffer_snapshot,
 9368                ),
 9369                cx,
 9370            ) {
 9371                return Some(hunk);
 9372            }
 9373        }
 9374        None
 9375    }
 9376
 9377    fn go_to_prev_hunk(&mut self, _: &GoToPrevHunk, cx: &mut ViewContext<Self>) {
 9378        let snapshot = self.snapshot(cx);
 9379        let selection = self.selections.newest::<Point>(cx);
 9380        self.go_to_hunk_before_position(&snapshot, selection.head(), cx);
 9381    }
 9382
 9383    fn go_to_hunk_before_position(
 9384        &mut self,
 9385        snapshot: &EditorSnapshot,
 9386        position: Point,
 9387        cx: &mut ViewContext<Editor>,
 9388    ) -> Option<MultiBufferDiffHunk> {
 9389        for (ix, position) in [position, snapshot.buffer_snapshot.max_point()]
 9390            .into_iter()
 9391            .enumerate()
 9392        {
 9393            if let Some(hunk) = self.go_to_next_hunk_in_direction(
 9394                snapshot,
 9395                position,
 9396                ix > 0,
 9397                snapshot
 9398                    .diff_map
 9399                    .diff_hunks_in_range_rev(Point::zero()..position, &snapshot.buffer_snapshot),
 9400                cx,
 9401            ) {
 9402                return Some(hunk);
 9403            }
 9404        }
 9405        None
 9406    }
 9407
 9408    fn go_to_next_hunk_in_direction(
 9409        &mut self,
 9410        snapshot: &DisplaySnapshot,
 9411        initial_point: Point,
 9412        is_wrapped: bool,
 9413        hunks: impl Iterator<Item = MultiBufferDiffHunk>,
 9414        cx: &mut ViewContext<Editor>,
 9415    ) -> Option<MultiBufferDiffHunk> {
 9416        let display_point = initial_point.to_display_point(snapshot);
 9417        let mut hunks = hunks
 9418            .map(|hunk| (diff_hunk_to_display(&hunk, snapshot), hunk))
 9419            .filter(|(display_hunk, _)| {
 9420                is_wrapped || !display_hunk.contains_display_row(display_point.row())
 9421            })
 9422            .dedup();
 9423
 9424        if let Some((display_hunk, hunk)) = hunks.next() {
 9425            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9426                let row = display_hunk.start_display_row();
 9427                let point = DisplayPoint::new(row, 0);
 9428                s.select_display_ranges([point..point]);
 9429            });
 9430
 9431            Some(hunk)
 9432        } else {
 9433            None
 9434        }
 9435    }
 9436
 9437    pub fn go_to_definition(
 9438        &mut self,
 9439        _: &GoToDefinition,
 9440        cx: &mut ViewContext<Self>,
 9441    ) -> Task<Result<Navigated>> {
 9442        let definition = self.go_to_definition_of_kind(GotoDefinitionKind::Symbol, false, cx);
 9443        cx.spawn(|editor, mut cx| async move {
 9444            if definition.await? == Navigated::Yes {
 9445                return Ok(Navigated::Yes);
 9446            }
 9447            match editor.update(&mut cx, |editor, cx| {
 9448                editor.find_all_references(&FindAllReferences, cx)
 9449            })? {
 9450                Some(references) => references.await,
 9451                None => Ok(Navigated::No),
 9452            }
 9453        })
 9454    }
 9455
 9456    pub fn go_to_declaration(
 9457        &mut self,
 9458        _: &GoToDeclaration,
 9459        cx: &mut ViewContext<Self>,
 9460    ) -> Task<Result<Navigated>> {
 9461        self.go_to_definition_of_kind(GotoDefinitionKind::Declaration, false, cx)
 9462    }
 9463
 9464    pub fn go_to_declaration_split(
 9465        &mut self,
 9466        _: &GoToDeclaration,
 9467        cx: &mut ViewContext<Self>,
 9468    ) -> Task<Result<Navigated>> {
 9469        self.go_to_definition_of_kind(GotoDefinitionKind::Declaration, true, cx)
 9470    }
 9471
 9472    pub fn go_to_implementation(
 9473        &mut self,
 9474        _: &GoToImplementation,
 9475        cx: &mut ViewContext<Self>,
 9476    ) -> Task<Result<Navigated>> {
 9477        self.go_to_definition_of_kind(GotoDefinitionKind::Implementation, false, cx)
 9478    }
 9479
 9480    pub fn go_to_implementation_split(
 9481        &mut self,
 9482        _: &GoToImplementationSplit,
 9483        cx: &mut ViewContext<Self>,
 9484    ) -> Task<Result<Navigated>> {
 9485        self.go_to_definition_of_kind(GotoDefinitionKind::Implementation, true, cx)
 9486    }
 9487
 9488    pub fn go_to_type_definition(
 9489        &mut self,
 9490        _: &GoToTypeDefinition,
 9491        cx: &mut ViewContext<Self>,
 9492    ) -> Task<Result<Navigated>> {
 9493        self.go_to_definition_of_kind(GotoDefinitionKind::Type, false, cx)
 9494    }
 9495
 9496    pub fn go_to_definition_split(
 9497        &mut self,
 9498        _: &GoToDefinitionSplit,
 9499        cx: &mut ViewContext<Self>,
 9500    ) -> Task<Result<Navigated>> {
 9501        self.go_to_definition_of_kind(GotoDefinitionKind::Symbol, true, cx)
 9502    }
 9503
 9504    pub fn go_to_type_definition_split(
 9505        &mut self,
 9506        _: &GoToTypeDefinitionSplit,
 9507        cx: &mut ViewContext<Self>,
 9508    ) -> Task<Result<Navigated>> {
 9509        self.go_to_definition_of_kind(GotoDefinitionKind::Type, true, cx)
 9510    }
 9511
 9512    fn go_to_definition_of_kind(
 9513        &mut self,
 9514        kind: GotoDefinitionKind,
 9515        split: bool,
 9516        cx: &mut ViewContext<Self>,
 9517    ) -> Task<Result<Navigated>> {
 9518        let Some(provider) = self.semantics_provider.clone() else {
 9519            return Task::ready(Ok(Navigated::No));
 9520        };
 9521        let head = self.selections.newest::<usize>(cx).head();
 9522        let buffer = self.buffer.read(cx);
 9523        let (buffer, head) = if let Some(text_anchor) = buffer.text_anchor_for_position(head, cx) {
 9524            text_anchor
 9525        } else {
 9526            return Task::ready(Ok(Navigated::No));
 9527        };
 9528
 9529        let Some(definitions) = provider.definitions(&buffer, head, kind, cx) else {
 9530            return Task::ready(Ok(Navigated::No));
 9531        };
 9532
 9533        cx.spawn(|editor, mut cx| async move {
 9534            let definitions = definitions.await?;
 9535            let navigated = editor
 9536                .update(&mut cx, |editor, cx| {
 9537                    editor.navigate_to_hover_links(
 9538                        Some(kind),
 9539                        definitions
 9540                            .into_iter()
 9541                            .filter(|location| {
 9542                                hover_links::exclude_link_to_position(&buffer, &head, location, cx)
 9543                            })
 9544                            .map(HoverLink::Text)
 9545                            .collect::<Vec<_>>(),
 9546                        split,
 9547                        cx,
 9548                    )
 9549                })?
 9550                .await?;
 9551            anyhow::Ok(navigated)
 9552        })
 9553    }
 9554
 9555    pub fn open_url(&mut self, _: &OpenUrl, cx: &mut ViewContext<Self>) {
 9556        let selection = self.selections.newest_anchor();
 9557        let head = selection.head();
 9558        let tail = selection.tail();
 9559
 9560        let Some((buffer, start_position)) =
 9561            self.buffer.read(cx).text_anchor_for_position(head, cx)
 9562        else {
 9563            return;
 9564        };
 9565
 9566        let end_position = if head != tail {
 9567            let Some((_, pos)) = self.buffer.read(cx).text_anchor_for_position(tail, cx) else {
 9568                return;
 9569            };
 9570            Some(pos)
 9571        } else {
 9572            None
 9573        };
 9574
 9575        let url_finder = cx.spawn(|editor, mut cx| async move {
 9576            let url = if let Some(end_pos) = end_position {
 9577                find_url_from_range(&buffer, start_position..end_pos, cx.clone())
 9578            } else {
 9579                find_url(&buffer, start_position, cx.clone()).map(|(_, url)| url)
 9580            };
 9581
 9582            if let Some(url) = url {
 9583                editor.update(&mut cx, |_, cx| {
 9584                    cx.open_url(&url);
 9585                })
 9586            } else {
 9587                Ok(())
 9588            }
 9589        });
 9590
 9591        url_finder.detach();
 9592    }
 9593
 9594    pub fn open_selected_filename(&mut self, _: &OpenSelectedFilename, cx: &mut ViewContext<Self>) {
 9595        let Some(workspace) = self.workspace() else {
 9596            return;
 9597        };
 9598
 9599        let position = self.selections.newest_anchor().head();
 9600
 9601        let Some((buffer, buffer_position)) =
 9602            self.buffer.read(cx).text_anchor_for_position(position, cx)
 9603        else {
 9604            return;
 9605        };
 9606
 9607        let project = self.project.clone();
 9608
 9609        cx.spawn(|_, mut cx| async move {
 9610            let result = find_file(&buffer, project, buffer_position, &mut cx).await;
 9611
 9612            if let Some((_, path)) = result {
 9613                workspace
 9614                    .update(&mut cx, |workspace, cx| {
 9615                        workspace.open_resolved_path(path, cx)
 9616                    })?
 9617                    .await?;
 9618            }
 9619            anyhow::Ok(())
 9620        })
 9621        .detach();
 9622    }
 9623
 9624    pub(crate) fn navigate_to_hover_links(
 9625        &mut self,
 9626        kind: Option<GotoDefinitionKind>,
 9627        mut definitions: Vec<HoverLink>,
 9628        split: bool,
 9629        cx: &mut ViewContext<Editor>,
 9630    ) -> Task<Result<Navigated>> {
 9631        // If there is one definition, just open it directly
 9632        if definitions.len() == 1 {
 9633            let definition = definitions.pop().unwrap();
 9634
 9635            enum TargetTaskResult {
 9636                Location(Option<Location>),
 9637                AlreadyNavigated,
 9638            }
 9639
 9640            let target_task = match definition {
 9641                HoverLink::Text(link) => {
 9642                    Task::ready(anyhow::Ok(TargetTaskResult::Location(Some(link.target))))
 9643                }
 9644                HoverLink::InlayHint(lsp_location, server_id) => {
 9645                    let computation = self.compute_target_location(lsp_location, server_id, cx);
 9646                    cx.background_executor().spawn(async move {
 9647                        let location = computation.await?;
 9648                        Ok(TargetTaskResult::Location(location))
 9649                    })
 9650                }
 9651                HoverLink::Url(url) => {
 9652                    cx.open_url(&url);
 9653                    Task::ready(Ok(TargetTaskResult::AlreadyNavigated))
 9654                }
 9655                HoverLink::File(path) => {
 9656                    if let Some(workspace) = self.workspace() {
 9657                        cx.spawn(|_, mut cx| async move {
 9658                            workspace
 9659                                .update(&mut cx, |workspace, cx| {
 9660                                    workspace.open_resolved_path(path, cx)
 9661                                })?
 9662                                .await
 9663                                .map(|_| TargetTaskResult::AlreadyNavigated)
 9664                        })
 9665                    } else {
 9666                        Task::ready(Ok(TargetTaskResult::Location(None)))
 9667                    }
 9668                }
 9669            };
 9670            cx.spawn(|editor, mut cx| async move {
 9671                let target = match target_task.await.context("target resolution task")? {
 9672                    TargetTaskResult::AlreadyNavigated => return Ok(Navigated::Yes),
 9673                    TargetTaskResult::Location(None) => return Ok(Navigated::No),
 9674                    TargetTaskResult::Location(Some(target)) => target,
 9675                };
 9676
 9677                editor.update(&mut cx, |editor, cx| {
 9678                    let Some(workspace) = editor.workspace() else {
 9679                        return Navigated::No;
 9680                    };
 9681                    let pane = workspace.read(cx).active_pane().clone();
 9682
 9683                    let range = target.range.to_offset(target.buffer.read(cx));
 9684                    let range = editor.range_for_match(&range);
 9685
 9686                    if Some(&target.buffer) == editor.buffer.read(cx).as_singleton().as_ref() {
 9687                        let buffer = target.buffer.read(cx);
 9688                        let range = check_multiline_range(buffer, range);
 9689                        editor.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9690                            s.select_ranges([range]);
 9691                        });
 9692                    } else {
 9693                        cx.window_context().defer(move |cx| {
 9694                            let target_editor: View<Self> =
 9695                                workspace.update(cx, |workspace, cx| {
 9696                                    let pane = if split {
 9697                                        workspace.adjacent_pane(cx)
 9698                                    } else {
 9699                                        workspace.active_pane().clone()
 9700                                    };
 9701
 9702                                    workspace.open_project_item(
 9703                                        pane,
 9704                                        target.buffer.clone(),
 9705                                        true,
 9706                                        true,
 9707                                        cx,
 9708                                    )
 9709                                });
 9710                            target_editor.update(cx, |target_editor, cx| {
 9711                                // When selecting a definition in a different buffer, disable the nav history
 9712                                // to avoid creating a history entry at the previous cursor location.
 9713                                pane.update(cx, |pane, _| pane.disable_history());
 9714                                let buffer = target.buffer.read(cx);
 9715                                let range = check_multiline_range(buffer, range);
 9716                                target_editor.change_selections(
 9717                                    Some(Autoscroll::focused()),
 9718                                    cx,
 9719                                    |s| {
 9720                                        s.select_ranges([range]);
 9721                                    },
 9722                                );
 9723                                pane.update(cx, |pane, _| pane.enable_history());
 9724                            });
 9725                        });
 9726                    }
 9727                    Navigated::Yes
 9728                })
 9729            })
 9730        } else if !definitions.is_empty() {
 9731            cx.spawn(|editor, mut cx| async move {
 9732                let (title, location_tasks, workspace) = editor
 9733                    .update(&mut cx, |editor, cx| {
 9734                        let tab_kind = match kind {
 9735                            Some(GotoDefinitionKind::Implementation) => "Implementations",
 9736                            _ => "Definitions",
 9737                        };
 9738                        let title = definitions
 9739                            .iter()
 9740                            .find_map(|definition| match definition {
 9741                                HoverLink::Text(link) => link.origin.as_ref().map(|origin| {
 9742                                    let buffer = origin.buffer.read(cx);
 9743                                    format!(
 9744                                        "{} for {}",
 9745                                        tab_kind,
 9746                                        buffer
 9747                                            .text_for_range(origin.range.clone())
 9748                                            .collect::<String>()
 9749                                    )
 9750                                }),
 9751                                HoverLink::InlayHint(_, _) => None,
 9752                                HoverLink::Url(_) => None,
 9753                                HoverLink::File(_) => None,
 9754                            })
 9755                            .unwrap_or(tab_kind.to_string());
 9756                        let location_tasks = definitions
 9757                            .into_iter()
 9758                            .map(|definition| match definition {
 9759                                HoverLink::Text(link) => Task::ready(Ok(Some(link.target))),
 9760                                HoverLink::InlayHint(lsp_location, server_id) => {
 9761                                    editor.compute_target_location(lsp_location, server_id, cx)
 9762                                }
 9763                                HoverLink::Url(_) => Task::ready(Ok(None)),
 9764                                HoverLink::File(_) => Task::ready(Ok(None)),
 9765                            })
 9766                            .collect::<Vec<_>>();
 9767                        (title, location_tasks, editor.workspace().clone())
 9768                    })
 9769                    .context("location tasks preparation")?;
 9770
 9771                let locations = future::join_all(location_tasks)
 9772                    .await
 9773                    .into_iter()
 9774                    .filter_map(|location| location.transpose())
 9775                    .collect::<Result<_>>()
 9776                    .context("location tasks")?;
 9777
 9778                let Some(workspace) = workspace else {
 9779                    return Ok(Navigated::No);
 9780                };
 9781                let opened = workspace
 9782                    .update(&mut cx, |workspace, cx| {
 9783                        Self::open_locations_in_multibuffer(workspace, locations, title, split, cx)
 9784                    })
 9785                    .ok();
 9786
 9787                anyhow::Ok(Navigated::from_bool(opened.is_some()))
 9788            })
 9789        } else {
 9790            Task::ready(Ok(Navigated::No))
 9791        }
 9792    }
 9793
 9794    fn compute_target_location(
 9795        &self,
 9796        lsp_location: lsp::Location,
 9797        server_id: LanguageServerId,
 9798        cx: &mut ViewContext<Self>,
 9799    ) -> Task<anyhow::Result<Option<Location>>> {
 9800        let Some(project) = self.project.clone() else {
 9801            return Task::ready(Ok(None));
 9802        };
 9803
 9804        cx.spawn(move |editor, mut cx| async move {
 9805            let location_task = editor.update(&mut cx, |_, cx| {
 9806                project.update(cx, |project, cx| {
 9807                    let language_server_name = project
 9808                        .language_server_statuses(cx)
 9809                        .find(|(id, _)| server_id == *id)
 9810                        .map(|(_, status)| LanguageServerName::from(status.name.as_str()));
 9811                    language_server_name.map(|language_server_name| {
 9812                        project.open_local_buffer_via_lsp(
 9813                            lsp_location.uri.clone(),
 9814                            server_id,
 9815                            language_server_name,
 9816                            cx,
 9817                        )
 9818                    })
 9819                })
 9820            })?;
 9821            let location = match location_task {
 9822                Some(task) => Some({
 9823                    let target_buffer_handle = task.await.context("open local buffer")?;
 9824                    let range = target_buffer_handle.update(&mut cx, |target_buffer, _| {
 9825                        let target_start = target_buffer
 9826                            .clip_point_utf16(point_from_lsp(lsp_location.range.start), Bias::Left);
 9827                        let target_end = target_buffer
 9828                            .clip_point_utf16(point_from_lsp(lsp_location.range.end), Bias::Left);
 9829                        target_buffer.anchor_after(target_start)
 9830                            ..target_buffer.anchor_before(target_end)
 9831                    })?;
 9832                    Location {
 9833                        buffer: target_buffer_handle,
 9834                        range,
 9835                    }
 9836                }),
 9837                None => None,
 9838            };
 9839            Ok(location)
 9840        })
 9841    }
 9842
 9843    pub fn find_all_references(
 9844        &mut self,
 9845        _: &FindAllReferences,
 9846        cx: &mut ViewContext<Self>,
 9847    ) -> Option<Task<Result<Navigated>>> {
 9848        let selection = self.selections.newest::<usize>(cx);
 9849        let multi_buffer = self.buffer.read(cx);
 9850        let head = selection.head();
 9851
 9852        let multi_buffer_snapshot = multi_buffer.snapshot(cx);
 9853        let head_anchor = multi_buffer_snapshot.anchor_at(
 9854            head,
 9855            if head < selection.tail() {
 9856                Bias::Right
 9857            } else {
 9858                Bias::Left
 9859            },
 9860        );
 9861
 9862        match self
 9863            .find_all_references_task_sources
 9864            .binary_search_by(|anchor| anchor.cmp(&head_anchor, &multi_buffer_snapshot))
 9865        {
 9866            Ok(_) => {
 9867                log::info!(
 9868                    "Ignoring repeated FindAllReferences invocation with the position of already running task"
 9869                );
 9870                return None;
 9871            }
 9872            Err(i) => {
 9873                self.find_all_references_task_sources.insert(i, head_anchor);
 9874            }
 9875        }
 9876
 9877        let (buffer, head) = multi_buffer.text_anchor_for_position(head, cx)?;
 9878        let workspace = self.workspace()?;
 9879        let project = workspace.read(cx).project().clone();
 9880        let references = project.update(cx, |project, cx| project.references(&buffer, head, cx));
 9881        Some(cx.spawn(|editor, mut cx| async move {
 9882            let _cleanup = defer({
 9883                let mut cx = cx.clone();
 9884                move || {
 9885                    let _ = editor.update(&mut cx, |editor, _| {
 9886                        if let Ok(i) =
 9887                            editor
 9888                                .find_all_references_task_sources
 9889                                .binary_search_by(|anchor| {
 9890                                    anchor.cmp(&head_anchor, &multi_buffer_snapshot)
 9891                                })
 9892                        {
 9893                            editor.find_all_references_task_sources.remove(i);
 9894                        }
 9895                    });
 9896                }
 9897            });
 9898
 9899            let locations = references.await?;
 9900            if locations.is_empty() {
 9901                return anyhow::Ok(Navigated::No);
 9902            }
 9903
 9904            workspace.update(&mut cx, |workspace, cx| {
 9905                let title = locations
 9906                    .first()
 9907                    .as_ref()
 9908                    .map(|location| {
 9909                        let buffer = location.buffer.read(cx);
 9910                        format!(
 9911                            "References to `{}`",
 9912                            buffer
 9913                                .text_for_range(location.range.clone())
 9914                                .collect::<String>()
 9915                        )
 9916                    })
 9917                    .unwrap();
 9918                Self::open_locations_in_multibuffer(workspace, locations, title, false, cx);
 9919                Navigated::Yes
 9920            })
 9921        }))
 9922    }
 9923
 9924    /// Opens a multibuffer with the given project locations in it
 9925    pub fn open_locations_in_multibuffer(
 9926        workspace: &mut Workspace,
 9927        mut locations: Vec<Location>,
 9928        title: String,
 9929        split: bool,
 9930        cx: &mut ViewContext<Workspace>,
 9931    ) {
 9932        // If there are multiple definitions, open them in a multibuffer
 9933        locations.sort_by_key(|location| location.buffer.read(cx).remote_id());
 9934        let mut locations = locations.into_iter().peekable();
 9935        let mut ranges_to_highlight = Vec::new();
 9936        let capability = workspace.project().read(cx).capability();
 9937
 9938        let excerpt_buffer = cx.new_model(|cx| {
 9939            let mut multibuffer = MultiBuffer::new(capability);
 9940            while let Some(location) = locations.next() {
 9941                let buffer = location.buffer.read(cx);
 9942                let mut ranges_for_buffer = Vec::new();
 9943                let range = location.range.to_offset(buffer);
 9944                ranges_for_buffer.push(range.clone());
 9945
 9946                while let Some(next_location) = locations.peek() {
 9947                    if next_location.buffer == location.buffer {
 9948                        ranges_for_buffer.push(next_location.range.to_offset(buffer));
 9949                        locations.next();
 9950                    } else {
 9951                        break;
 9952                    }
 9953                }
 9954
 9955                ranges_for_buffer.sort_by_key(|range| (range.start, Reverse(range.end)));
 9956                ranges_to_highlight.extend(multibuffer.push_excerpts_with_context_lines(
 9957                    location.buffer.clone(),
 9958                    ranges_for_buffer,
 9959                    DEFAULT_MULTIBUFFER_CONTEXT,
 9960                    cx,
 9961                ))
 9962            }
 9963
 9964            multibuffer.with_title(title)
 9965        });
 9966
 9967        let editor = cx.new_view(|cx| {
 9968            Editor::for_multibuffer(excerpt_buffer, Some(workspace.project().clone()), true, cx)
 9969        });
 9970        editor.update(cx, |editor, cx| {
 9971            if let Some(first_range) = ranges_to_highlight.first() {
 9972                editor.change_selections(None, cx, |selections| {
 9973                    selections.clear_disjoint();
 9974                    selections.select_anchor_ranges(std::iter::once(first_range.clone()));
 9975                });
 9976            }
 9977            editor.highlight_background::<Self>(
 9978                &ranges_to_highlight,
 9979                |theme| theme.editor_highlighted_line_background,
 9980                cx,
 9981            );
 9982            editor.register_buffers_with_language_servers(cx);
 9983        });
 9984
 9985        let item = Box::new(editor);
 9986        let item_id = item.item_id();
 9987
 9988        if split {
 9989            workspace.split_item(SplitDirection::Right, item.clone(), cx);
 9990        } else {
 9991            let destination_index = workspace.active_pane().update(cx, |pane, cx| {
 9992                if PreviewTabsSettings::get_global(cx).enable_preview_from_code_navigation {
 9993                    pane.close_current_preview_item(cx)
 9994                } else {
 9995                    None
 9996                }
 9997            });
 9998            workspace.add_item_to_active_pane(item.clone(), destination_index, true, cx);
 9999        }
10000        workspace.active_pane().update(cx, |pane, cx| {
10001            pane.set_preview_item_id(Some(item_id), cx);
10002        });
10003    }
10004
10005    pub fn rename(&mut self, _: &Rename, cx: &mut ViewContext<Self>) -> Option<Task<Result<()>>> {
10006        use language::ToOffset as _;
10007
10008        let provider = self.semantics_provider.clone()?;
10009        let selection = self.selections.newest_anchor().clone();
10010        let (cursor_buffer, cursor_buffer_position) = self
10011            .buffer
10012            .read(cx)
10013            .text_anchor_for_position(selection.head(), cx)?;
10014        let (tail_buffer, cursor_buffer_position_end) = self
10015            .buffer
10016            .read(cx)
10017            .text_anchor_for_position(selection.tail(), cx)?;
10018        if tail_buffer != cursor_buffer {
10019            return None;
10020        }
10021
10022        let snapshot = cursor_buffer.read(cx).snapshot();
10023        let cursor_buffer_offset = cursor_buffer_position.to_offset(&snapshot);
10024        let cursor_buffer_offset_end = cursor_buffer_position_end.to_offset(&snapshot);
10025        let prepare_rename = provider
10026            .range_for_rename(&cursor_buffer, cursor_buffer_position, cx)
10027            .unwrap_or_else(|| Task::ready(Ok(None)));
10028        drop(snapshot);
10029
10030        Some(cx.spawn(|this, mut cx| async move {
10031            let rename_range = if let Some(range) = prepare_rename.await? {
10032                Some(range)
10033            } else {
10034                this.update(&mut cx, |this, cx| {
10035                    let buffer = this.buffer.read(cx).snapshot(cx);
10036                    let mut buffer_highlights = this
10037                        .document_highlights_for_position(selection.head(), &buffer)
10038                        .filter(|highlight| {
10039                            highlight.start.excerpt_id == selection.head().excerpt_id
10040                                && highlight.end.excerpt_id == selection.head().excerpt_id
10041                        });
10042                    buffer_highlights
10043                        .next()
10044                        .map(|highlight| highlight.start.text_anchor..highlight.end.text_anchor)
10045                })?
10046            };
10047            if let Some(rename_range) = rename_range {
10048                this.update(&mut cx, |this, cx| {
10049                    let snapshot = cursor_buffer.read(cx).snapshot();
10050                    let rename_buffer_range = rename_range.to_offset(&snapshot);
10051                    let cursor_offset_in_rename_range =
10052                        cursor_buffer_offset.saturating_sub(rename_buffer_range.start);
10053                    let cursor_offset_in_rename_range_end =
10054                        cursor_buffer_offset_end.saturating_sub(rename_buffer_range.start);
10055
10056                    this.take_rename(false, cx);
10057                    let buffer = this.buffer.read(cx).read(cx);
10058                    let cursor_offset = selection.head().to_offset(&buffer);
10059                    let rename_start = cursor_offset.saturating_sub(cursor_offset_in_rename_range);
10060                    let rename_end = rename_start + rename_buffer_range.len();
10061                    let range = buffer.anchor_before(rename_start)..buffer.anchor_after(rename_end);
10062                    let mut old_highlight_id = None;
10063                    let old_name: Arc<str> = buffer
10064                        .chunks(rename_start..rename_end, true)
10065                        .map(|chunk| {
10066                            if old_highlight_id.is_none() {
10067                                old_highlight_id = chunk.syntax_highlight_id;
10068                            }
10069                            chunk.text
10070                        })
10071                        .collect::<String>()
10072                        .into();
10073
10074                    drop(buffer);
10075
10076                    // Position the selection in the rename editor so that it matches the current selection.
10077                    this.show_local_selections = false;
10078                    let rename_editor = cx.new_view(|cx| {
10079                        let mut editor = Editor::single_line(cx);
10080                        editor.buffer.update(cx, |buffer, cx| {
10081                            buffer.edit([(0..0, old_name.clone())], None, cx)
10082                        });
10083                        let rename_selection_range = match cursor_offset_in_rename_range
10084                            .cmp(&cursor_offset_in_rename_range_end)
10085                        {
10086                            Ordering::Equal => {
10087                                editor.select_all(&SelectAll, cx);
10088                                return editor;
10089                            }
10090                            Ordering::Less => {
10091                                cursor_offset_in_rename_range..cursor_offset_in_rename_range_end
10092                            }
10093                            Ordering::Greater => {
10094                                cursor_offset_in_rename_range_end..cursor_offset_in_rename_range
10095                            }
10096                        };
10097                        if rename_selection_range.end > old_name.len() {
10098                            editor.select_all(&SelectAll, cx);
10099                        } else {
10100                            editor.change_selections(Some(Autoscroll::fit()), cx, |s| {
10101                                s.select_ranges([rename_selection_range]);
10102                            });
10103                        }
10104                        editor
10105                    });
10106                    cx.subscribe(&rename_editor, |_, _, e: &EditorEvent, cx| {
10107                        if e == &EditorEvent::Focused {
10108                            cx.emit(EditorEvent::FocusedIn)
10109                        }
10110                    })
10111                    .detach();
10112
10113                    let write_highlights =
10114                        this.clear_background_highlights::<DocumentHighlightWrite>(cx);
10115                    let read_highlights =
10116                        this.clear_background_highlights::<DocumentHighlightRead>(cx);
10117                    let ranges = write_highlights
10118                        .iter()
10119                        .flat_map(|(_, ranges)| ranges.iter())
10120                        .chain(read_highlights.iter().flat_map(|(_, ranges)| ranges.iter()))
10121                        .cloned()
10122                        .collect();
10123
10124                    this.highlight_text::<Rename>(
10125                        ranges,
10126                        HighlightStyle {
10127                            fade_out: Some(0.6),
10128                            ..Default::default()
10129                        },
10130                        cx,
10131                    );
10132                    let rename_focus_handle = rename_editor.focus_handle(cx);
10133                    cx.focus(&rename_focus_handle);
10134                    let block_id = this.insert_blocks(
10135                        [BlockProperties {
10136                            style: BlockStyle::Flex,
10137                            placement: BlockPlacement::Below(range.start),
10138                            height: 1,
10139                            render: Arc::new({
10140                                let rename_editor = rename_editor.clone();
10141                                move |cx: &mut BlockContext| {
10142                                    let mut text_style = cx.editor_style.text.clone();
10143                                    if let Some(highlight_style) = old_highlight_id
10144                                        .and_then(|h| h.style(&cx.editor_style.syntax))
10145                                    {
10146                                        text_style = text_style.highlight(highlight_style);
10147                                    }
10148                                    div()
10149                                        .block_mouse_down()
10150                                        .pl(cx.anchor_x)
10151                                        .child(EditorElement::new(
10152                                            &rename_editor,
10153                                            EditorStyle {
10154                                                background: cx.theme().system().transparent,
10155                                                local_player: cx.editor_style.local_player,
10156                                                text: text_style,
10157                                                scrollbar_width: cx.editor_style.scrollbar_width,
10158                                                syntax: cx.editor_style.syntax.clone(),
10159                                                status: cx.editor_style.status.clone(),
10160                                                inlay_hints_style: HighlightStyle {
10161                                                    font_weight: Some(FontWeight::BOLD),
10162                                                    ..make_inlay_hints_style(cx)
10163                                                },
10164                                                inline_completion_styles: make_suggestion_styles(
10165                                                    cx,
10166                                                ),
10167                                                ..EditorStyle::default()
10168                                            },
10169                                        ))
10170                                        .into_any_element()
10171                                }
10172                            }),
10173                            priority: 0,
10174                        }],
10175                        Some(Autoscroll::fit()),
10176                        cx,
10177                    )[0];
10178                    this.pending_rename = Some(RenameState {
10179                        range,
10180                        old_name,
10181                        editor: rename_editor,
10182                        block_id,
10183                    });
10184                })?;
10185            }
10186
10187            Ok(())
10188        }))
10189    }
10190
10191    pub fn confirm_rename(
10192        &mut self,
10193        _: &ConfirmRename,
10194        cx: &mut ViewContext<Self>,
10195    ) -> Option<Task<Result<()>>> {
10196        let rename = self.take_rename(false, cx)?;
10197        let workspace = self.workspace()?.downgrade();
10198        let (buffer, start) = self
10199            .buffer
10200            .read(cx)
10201            .text_anchor_for_position(rename.range.start, cx)?;
10202        let (end_buffer, _) = self
10203            .buffer
10204            .read(cx)
10205            .text_anchor_for_position(rename.range.end, cx)?;
10206        if buffer != end_buffer {
10207            return None;
10208        }
10209
10210        let old_name = rename.old_name;
10211        let new_name = rename.editor.read(cx).text(cx);
10212
10213        let rename = self.semantics_provider.as_ref()?.perform_rename(
10214            &buffer,
10215            start,
10216            new_name.clone(),
10217            cx,
10218        )?;
10219
10220        Some(cx.spawn(|editor, mut cx| async move {
10221            let project_transaction = rename.await?;
10222            Self::open_project_transaction(
10223                &editor,
10224                workspace,
10225                project_transaction,
10226                format!("Rename: {} → {}", old_name, new_name),
10227                cx.clone(),
10228            )
10229            .await?;
10230
10231            editor.update(&mut cx, |editor, cx| {
10232                editor.refresh_document_highlights(cx);
10233            })?;
10234            Ok(())
10235        }))
10236    }
10237
10238    fn take_rename(
10239        &mut self,
10240        moving_cursor: bool,
10241        cx: &mut ViewContext<Self>,
10242    ) -> Option<RenameState> {
10243        let rename = self.pending_rename.take()?;
10244        if rename.editor.focus_handle(cx).is_focused(cx) {
10245            cx.focus(&self.focus_handle);
10246        }
10247
10248        self.remove_blocks(
10249            [rename.block_id].into_iter().collect(),
10250            Some(Autoscroll::fit()),
10251            cx,
10252        );
10253        self.clear_highlights::<Rename>(cx);
10254        self.show_local_selections = true;
10255
10256        if moving_cursor {
10257            let cursor_in_rename_editor = rename.editor.update(cx, |editor, cx| {
10258                editor.selections.newest::<usize>(cx).head()
10259            });
10260
10261            // Update the selection to match the position of the selection inside
10262            // the rename editor.
10263            let snapshot = self.buffer.read(cx).read(cx);
10264            let rename_range = rename.range.to_offset(&snapshot);
10265            let cursor_in_editor = snapshot
10266                .clip_offset(rename_range.start + cursor_in_rename_editor, Bias::Left)
10267                .min(rename_range.end);
10268            drop(snapshot);
10269
10270            self.change_selections(None, cx, |s| {
10271                s.select_ranges(vec![cursor_in_editor..cursor_in_editor])
10272            });
10273        } else {
10274            self.refresh_document_highlights(cx);
10275        }
10276
10277        Some(rename)
10278    }
10279
10280    pub fn pending_rename(&self) -> Option<&RenameState> {
10281        self.pending_rename.as_ref()
10282    }
10283
10284    fn format(&mut self, _: &Format, cx: &mut ViewContext<Self>) -> Option<Task<Result<()>>> {
10285        let project = match &self.project {
10286            Some(project) => project.clone(),
10287            None => return None,
10288        };
10289
10290        Some(self.perform_format(project, FormatTrigger::Manual, FormatTarget::Buffers, cx))
10291    }
10292
10293    fn format_selections(
10294        &mut self,
10295        _: &FormatSelections,
10296        cx: &mut ViewContext<Self>,
10297    ) -> Option<Task<Result<()>>> {
10298        let project = match &self.project {
10299            Some(project) => project.clone(),
10300            None => return None,
10301        };
10302
10303        let ranges = self
10304            .selections
10305            .all_adjusted(cx)
10306            .into_iter()
10307            .map(|selection| selection.range())
10308            .collect_vec();
10309
10310        Some(self.perform_format(
10311            project,
10312            FormatTrigger::Manual,
10313            FormatTarget::Ranges(ranges),
10314            cx,
10315        ))
10316    }
10317
10318    fn perform_format(
10319        &mut self,
10320        project: Model<Project>,
10321        trigger: FormatTrigger,
10322        target: FormatTarget,
10323        cx: &mut ViewContext<Self>,
10324    ) -> Task<Result<()>> {
10325        let buffer = self.buffer.clone();
10326        let (buffers, target) = match target {
10327            FormatTarget::Buffers => {
10328                let mut buffers = buffer.read(cx).all_buffers();
10329                if trigger == FormatTrigger::Save {
10330                    buffers.retain(|buffer| buffer.read(cx).is_dirty());
10331                }
10332                (buffers, LspFormatTarget::Buffers)
10333            }
10334            FormatTarget::Ranges(selection_ranges) => {
10335                let multi_buffer = buffer.read(cx);
10336                let snapshot = multi_buffer.read(cx);
10337                let mut buffers = HashSet::default();
10338                let mut buffer_id_to_ranges: BTreeMap<BufferId, Vec<Range<text::Anchor>>> =
10339                    BTreeMap::new();
10340                for selection_range in selection_ranges {
10341                    for (excerpt, buffer_range) in snapshot.range_to_buffer_ranges(selection_range)
10342                    {
10343                        let buffer_id = excerpt.buffer_id();
10344                        let start = excerpt.buffer().anchor_before(buffer_range.start);
10345                        let end = excerpt.buffer().anchor_after(buffer_range.end);
10346                        buffers.insert(multi_buffer.buffer(buffer_id).unwrap());
10347                        buffer_id_to_ranges
10348                            .entry(buffer_id)
10349                            .and_modify(|buffer_ranges| buffer_ranges.push(start..end))
10350                            .or_insert_with(|| vec![start..end]);
10351                    }
10352                }
10353                (buffers, LspFormatTarget::Ranges(buffer_id_to_ranges))
10354            }
10355        };
10356
10357        let mut timeout = cx.background_executor().timer(FORMAT_TIMEOUT).fuse();
10358        let format = project.update(cx, |project, cx| {
10359            project.format(buffers, target, true, trigger, cx)
10360        });
10361
10362        cx.spawn(|_, mut cx| async move {
10363            let transaction = futures::select_biased! {
10364                () = timeout => {
10365                    log::warn!("timed out waiting for formatting");
10366                    None
10367                }
10368                transaction = format.log_err().fuse() => transaction,
10369            };
10370
10371            buffer
10372                .update(&mut cx, |buffer, cx| {
10373                    if let Some(transaction) = transaction {
10374                        if !buffer.is_singleton() {
10375                            buffer.push_transaction(&transaction.0, cx);
10376                        }
10377                    }
10378
10379                    cx.notify();
10380                })
10381                .ok();
10382
10383            Ok(())
10384        })
10385    }
10386
10387    fn restart_language_server(&mut self, _: &RestartLanguageServer, cx: &mut ViewContext<Self>) {
10388        if let Some(project) = self.project.clone() {
10389            self.buffer.update(cx, |multi_buffer, cx| {
10390                project.update(cx, |project, cx| {
10391                    project.restart_language_servers_for_buffers(multi_buffer.all_buffers(), cx);
10392                });
10393            })
10394        }
10395    }
10396
10397    fn cancel_language_server_work(
10398        &mut self,
10399        _: &actions::CancelLanguageServerWork,
10400        cx: &mut ViewContext<Self>,
10401    ) {
10402        if let Some(project) = self.project.clone() {
10403            self.buffer.update(cx, |multi_buffer, cx| {
10404                project.update(cx, |project, cx| {
10405                    project.cancel_language_server_work_for_buffers(multi_buffer.all_buffers(), cx);
10406                });
10407            })
10408        }
10409    }
10410
10411    fn show_character_palette(&mut self, _: &ShowCharacterPalette, cx: &mut ViewContext<Self>) {
10412        cx.show_character_palette();
10413    }
10414
10415    fn refresh_active_diagnostics(&mut self, cx: &mut ViewContext<Editor>) {
10416        if let Some(active_diagnostics) = self.active_diagnostics.as_mut() {
10417            let buffer = self.buffer.read(cx).snapshot(cx);
10418            let primary_range_start = active_diagnostics.primary_range.start.to_offset(&buffer);
10419            let is_valid = buffer
10420                .diagnostics_in_range(active_diagnostics.primary_range.clone(), false)
10421                .any(|entry| {
10422                    let range = entry.range.to_offset(&buffer);
10423                    entry.diagnostic.is_primary
10424                        && !range.is_empty()
10425                        && range.start == primary_range_start
10426                        && entry.diagnostic.message == active_diagnostics.primary_message
10427                });
10428
10429            if is_valid != active_diagnostics.is_valid {
10430                active_diagnostics.is_valid = is_valid;
10431                let mut new_styles = HashMap::default();
10432                for (block_id, diagnostic) in &active_diagnostics.blocks {
10433                    new_styles.insert(
10434                        *block_id,
10435                        diagnostic_block_renderer(diagnostic.clone(), None, true, is_valid),
10436                    );
10437                }
10438                self.display_map.update(cx, |display_map, _cx| {
10439                    display_map.replace_blocks(new_styles)
10440                });
10441            }
10442        }
10443    }
10444
10445    fn activate_diagnostics(&mut self, group_id: usize, cx: &mut ViewContext<Self>) {
10446        self.dismiss_diagnostics(cx);
10447        let snapshot = self.snapshot(cx);
10448        self.active_diagnostics = self.display_map.update(cx, |display_map, cx| {
10449            let buffer = self.buffer.read(cx).snapshot(cx);
10450
10451            let mut primary_range = None;
10452            let mut primary_message = None;
10453            let mut group_end = Point::zero();
10454            let diagnostic_group = buffer
10455                .diagnostic_group(group_id)
10456                .filter_map(|entry| {
10457                    let start = entry.range.start.to_point(&buffer);
10458                    let end = entry.range.end.to_point(&buffer);
10459                    if snapshot.is_line_folded(MultiBufferRow(start.row))
10460                        && (start.row == end.row
10461                            || snapshot.is_line_folded(MultiBufferRow(end.row)))
10462                    {
10463                        return None;
10464                    }
10465                    if end > group_end {
10466                        group_end = end;
10467                    }
10468                    if entry.diagnostic.is_primary {
10469                        primary_range = Some(entry.range.clone());
10470                        primary_message = Some(entry.diagnostic.message.clone());
10471                    }
10472                    Some(entry)
10473                })
10474                .collect::<Vec<_>>();
10475            let primary_range = primary_range?;
10476            let primary_message = primary_message?;
10477
10478            let blocks = display_map
10479                .insert_blocks(
10480                    diagnostic_group.iter().map(|entry| {
10481                        let diagnostic = entry.diagnostic.clone();
10482                        let message_height = diagnostic.message.matches('\n').count() as u32 + 1;
10483                        BlockProperties {
10484                            style: BlockStyle::Fixed,
10485                            placement: BlockPlacement::Below(
10486                                buffer.anchor_after(entry.range.start),
10487                            ),
10488                            height: message_height,
10489                            render: diagnostic_block_renderer(diagnostic, None, true, true),
10490                            priority: 0,
10491                        }
10492                    }),
10493                    cx,
10494                )
10495                .into_iter()
10496                .zip(diagnostic_group.into_iter().map(|entry| entry.diagnostic))
10497                .collect();
10498
10499            Some(ActiveDiagnosticGroup {
10500                primary_range,
10501                primary_message,
10502                group_id,
10503                blocks,
10504                is_valid: true,
10505            })
10506        });
10507    }
10508
10509    fn dismiss_diagnostics(&mut self, cx: &mut ViewContext<Self>) {
10510        if let Some(active_diagnostic_group) = self.active_diagnostics.take() {
10511            self.display_map.update(cx, |display_map, cx| {
10512                display_map.remove_blocks(active_diagnostic_group.blocks.into_keys().collect(), cx);
10513            });
10514            cx.notify();
10515        }
10516    }
10517
10518    pub fn set_selections_from_remote(
10519        &mut self,
10520        selections: Vec<Selection<Anchor>>,
10521        pending_selection: Option<Selection<Anchor>>,
10522        cx: &mut ViewContext<Self>,
10523    ) {
10524        let old_cursor_position = self.selections.newest_anchor().head();
10525        self.selections.change_with(cx, |s| {
10526            s.select_anchors(selections);
10527            if let Some(pending_selection) = pending_selection {
10528                s.set_pending(pending_selection, SelectMode::Character);
10529            } else {
10530                s.clear_pending();
10531            }
10532        });
10533        self.selections_did_change(false, &old_cursor_position, true, cx);
10534    }
10535
10536    fn push_to_selection_history(&mut self) {
10537        self.selection_history.push(SelectionHistoryEntry {
10538            selections: self.selections.disjoint_anchors(),
10539            select_next_state: self.select_next_state.clone(),
10540            select_prev_state: self.select_prev_state.clone(),
10541            add_selections_state: self.add_selections_state.clone(),
10542        });
10543    }
10544
10545    pub fn transact(
10546        &mut self,
10547        cx: &mut ViewContext<Self>,
10548        update: impl FnOnce(&mut Self, &mut ViewContext<Self>),
10549    ) -> Option<TransactionId> {
10550        self.start_transaction_at(Instant::now(), cx);
10551        update(self, cx);
10552        self.end_transaction_at(Instant::now(), cx)
10553    }
10554
10555    pub fn start_transaction_at(&mut self, now: Instant, cx: &mut ViewContext<Self>) {
10556        self.end_selection(cx);
10557        if let Some(tx_id) = self
10558            .buffer
10559            .update(cx, |buffer, cx| buffer.start_transaction_at(now, cx))
10560        {
10561            self.selection_history
10562                .insert_transaction(tx_id, self.selections.disjoint_anchors());
10563            cx.emit(EditorEvent::TransactionBegun {
10564                transaction_id: tx_id,
10565            })
10566        }
10567    }
10568
10569    pub fn end_transaction_at(
10570        &mut self,
10571        now: Instant,
10572        cx: &mut ViewContext<Self>,
10573    ) -> Option<TransactionId> {
10574        if let Some(transaction_id) = self
10575            .buffer
10576            .update(cx, |buffer, cx| buffer.end_transaction_at(now, cx))
10577        {
10578            if let Some((_, end_selections)) =
10579                self.selection_history.transaction_mut(transaction_id)
10580            {
10581                *end_selections = Some(self.selections.disjoint_anchors());
10582            } else {
10583                log::error!("unexpectedly ended a transaction that wasn't started by this editor");
10584            }
10585
10586            cx.emit(EditorEvent::Edited { transaction_id });
10587            Some(transaction_id)
10588        } else {
10589            None
10590        }
10591    }
10592
10593    pub fn toggle_fold(&mut self, _: &actions::ToggleFold, cx: &mut ViewContext<Self>) {
10594        if self.is_singleton(cx) {
10595            let selection = self.selections.newest::<Point>(cx);
10596
10597            let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10598            let range = if selection.is_empty() {
10599                let point = selection.head().to_display_point(&display_map);
10600                let start = DisplayPoint::new(point.row(), 0).to_point(&display_map);
10601                let end = DisplayPoint::new(point.row(), display_map.line_len(point.row()))
10602                    .to_point(&display_map);
10603                start..end
10604            } else {
10605                selection.range()
10606            };
10607            if display_map.folds_in_range(range).next().is_some() {
10608                self.unfold_lines(&Default::default(), cx)
10609            } else {
10610                self.fold(&Default::default(), cx)
10611            }
10612        } else {
10613            let multi_buffer_snapshot = self.buffer.read(cx).snapshot(cx);
10614            let mut toggled_buffers = HashSet::default();
10615            for (_, buffer_snapshot, _) in
10616                multi_buffer_snapshot.excerpts_in_ranges(self.selections.disjoint_anchor_ranges())
10617            {
10618                let buffer_id = buffer_snapshot.remote_id();
10619                if toggled_buffers.insert(buffer_id) {
10620                    if self.buffer_folded(buffer_id, cx) {
10621                        self.unfold_buffer(buffer_id, cx);
10622                    } else {
10623                        self.fold_buffer(buffer_id, cx);
10624                    }
10625                }
10626            }
10627        }
10628    }
10629
10630    pub fn toggle_fold_recursive(
10631        &mut self,
10632        _: &actions::ToggleFoldRecursive,
10633        cx: &mut ViewContext<Self>,
10634    ) {
10635        let selection = self.selections.newest::<Point>(cx);
10636
10637        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10638        let range = if selection.is_empty() {
10639            let point = selection.head().to_display_point(&display_map);
10640            let start = DisplayPoint::new(point.row(), 0).to_point(&display_map);
10641            let end = DisplayPoint::new(point.row(), display_map.line_len(point.row()))
10642                .to_point(&display_map);
10643            start..end
10644        } else {
10645            selection.range()
10646        };
10647        if display_map.folds_in_range(range).next().is_some() {
10648            self.unfold_recursive(&Default::default(), cx)
10649        } else {
10650            self.fold_recursive(&Default::default(), cx)
10651        }
10652    }
10653
10654    pub fn fold(&mut self, _: &actions::Fold, cx: &mut ViewContext<Self>) {
10655        if self.is_singleton(cx) {
10656            let mut to_fold = Vec::new();
10657            let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10658            let selections = self.selections.all_adjusted(cx);
10659
10660            for selection in selections {
10661                let range = selection.range().sorted();
10662                let buffer_start_row = range.start.row;
10663
10664                if range.start.row != range.end.row {
10665                    let mut found = false;
10666                    let mut row = range.start.row;
10667                    while row <= range.end.row {
10668                        if let Some(crease) = display_map.crease_for_buffer_row(MultiBufferRow(row))
10669                        {
10670                            found = true;
10671                            row = crease.range().end.row + 1;
10672                            to_fold.push(crease);
10673                        } else {
10674                            row += 1
10675                        }
10676                    }
10677                    if found {
10678                        continue;
10679                    }
10680                }
10681
10682                for row in (0..=range.start.row).rev() {
10683                    if let Some(crease) = display_map.crease_for_buffer_row(MultiBufferRow(row)) {
10684                        if crease.range().end.row >= buffer_start_row {
10685                            to_fold.push(crease);
10686                            if row <= range.start.row {
10687                                break;
10688                            }
10689                        }
10690                    }
10691                }
10692            }
10693
10694            self.fold_creases(to_fold, true, cx);
10695        } else {
10696            let multi_buffer_snapshot = self.buffer.read(cx).snapshot(cx);
10697            let mut folded_buffers = HashSet::default();
10698            for (_, buffer_snapshot, _) in
10699                multi_buffer_snapshot.excerpts_in_ranges(self.selections.disjoint_anchor_ranges())
10700            {
10701                let buffer_id = buffer_snapshot.remote_id();
10702                if folded_buffers.insert(buffer_id) {
10703                    self.fold_buffer(buffer_id, cx);
10704                }
10705            }
10706        }
10707    }
10708
10709    fn fold_at_level(&mut self, fold_at: &FoldAtLevel, cx: &mut ViewContext<Self>) {
10710        if !self.buffer.read(cx).is_singleton() {
10711            return;
10712        }
10713
10714        let fold_at_level = fold_at.level;
10715        let snapshot = self.buffer.read(cx).snapshot(cx);
10716        let mut to_fold = Vec::new();
10717        let mut stack = vec![(0, snapshot.max_row().0, 1)];
10718
10719        while let Some((mut start_row, end_row, current_level)) = stack.pop() {
10720            while start_row < end_row {
10721                match self
10722                    .snapshot(cx)
10723                    .crease_for_buffer_row(MultiBufferRow(start_row))
10724                {
10725                    Some(crease) => {
10726                        let nested_start_row = crease.range().start.row + 1;
10727                        let nested_end_row = crease.range().end.row;
10728
10729                        if current_level < fold_at_level {
10730                            stack.push((nested_start_row, nested_end_row, current_level + 1));
10731                        } else if current_level == fold_at_level {
10732                            to_fold.push(crease);
10733                        }
10734
10735                        start_row = nested_end_row + 1;
10736                    }
10737                    None => start_row += 1,
10738                }
10739            }
10740        }
10741
10742        self.fold_creases(to_fold, true, cx);
10743    }
10744
10745    pub fn fold_all(&mut self, _: &actions::FoldAll, cx: &mut ViewContext<Self>) {
10746        if self.buffer.read(cx).is_singleton() {
10747            let mut fold_ranges = Vec::new();
10748            let snapshot = self.buffer.read(cx).snapshot(cx);
10749
10750            for row in 0..snapshot.max_row().0 {
10751                if let Some(foldable_range) =
10752                    self.snapshot(cx).crease_for_buffer_row(MultiBufferRow(row))
10753                {
10754                    fold_ranges.push(foldable_range);
10755                }
10756            }
10757
10758            self.fold_creases(fold_ranges, true, cx);
10759        } else {
10760            self.toggle_fold_multiple_buffers = cx.spawn(|editor, mut cx| async move {
10761                editor
10762                    .update(&mut cx, |editor, cx| {
10763                        for buffer_id in editor.buffer.read(cx).excerpt_buffer_ids() {
10764                            editor.fold_buffer(buffer_id, cx);
10765                        }
10766                    })
10767                    .ok();
10768            });
10769        }
10770    }
10771
10772    pub fn fold_function_bodies(
10773        &mut self,
10774        _: &actions::FoldFunctionBodies,
10775        cx: &mut ViewContext<Self>,
10776    ) {
10777        let snapshot = self.buffer.read(cx).snapshot(cx);
10778        let Some((_, _, buffer)) = snapshot.as_singleton() else {
10779            return;
10780        };
10781        let creases = buffer
10782            .function_body_fold_ranges(0..buffer.len())
10783            .map(|range| Crease::simple(range, self.display_map.read(cx).fold_placeholder.clone()))
10784            .collect();
10785
10786        self.fold_creases(creases, true, cx);
10787    }
10788
10789    pub fn fold_recursive(&mut self, _: &actions::FoldRecursive, cx: &mut ViewContext<Self>) {
10790        let mut to_fold = Vec::new();
10791        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10792        let selections = self.selections.all_adjusted(cx);
10793
10794        for selection in selections {
10795            let range = selection.range().sorted();
10796            let buffer_start_row = range.start.row;
10797
10798            if range.start.row != range.end.row {
10799                let mut found = false;
10800                for row in range.start.row..=range.end.row {
10801                    if let Some(crease) = display_map.crease_for_buffer_row(MultiBufferRow(row)) {
10802                        found = true;
10803                        to_fold.push(crease);
10804                    }
10805                }
10806                if found {
10807                    continue;
10808                }
10809            }
10810
10811            for row in (0..=range.start.row).rev() {
10812                if let Some(crease) = display_map.crease_for_buffer_row(MultiBufferRow(row)) {
10813                    if crease.range().end.row >= buffer_start_row {
10814                        to_fold.push(crease);
10815                    } else {
10816                        break;
10817                    }
10818                }
10819            }
10820        }
10821
10822        self.fold_creases(to_fold, true, cx);
10823    }
10824
10825    pub fn fold_at(&mut self, fold_at: &FoldAt, cx: &mut ViewContext<Self>) {
10826        let buffer_row = fold_at.buffer_row;
10827        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10828
10829        if let Some(crease) = display_map.crease_for_buffer_row(buffer_row) {
10830            let autoscroll = self
10831                .selections
10832                .all::<Point>(cx)
10833                .iter()
10834                .any(|selection| crease.range().overlaps(&selection.range()));
10835
10836            self.fold_creases(vec![crease], autoscroll, cx);
10837        }
10838    }
10839
10840    pub fn unfold_lines(&mut self, _: &UnfoldLines, cx: &mut ViewContext<Self>) {
10841        if self.is_singleton(cx) {
10842            let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10843            let buffer = &display_map.buffer_snapshot;
10844            let selections = self.selections.all::<Point>(cx);
10845            let ranges = selections
10846                .iter()
10847                .map(|s| {
10848                    let range = s.display_range(&display_map).sorted();
10849                    let mut start = range.start.to_point(&display_map);
10850                    let mut end = range.end.to_point(&display_map);
10851                    start.column = 0;
10852                    end.column = buffer.line_len(MultiBufferRow(end.row));
10853                    start..end
10854                })
10855                .collect::<Vec<_>>();
10856
10857            self.unfold_ranges(&ranges, true, true, cx);
10858        } else {
10859            let multi_buffer_snapshot = self.buffer.read(cx).snapshot(cx);
10860            let mut unfolded_buffers = HashSet::default();
10861            for (_, buffer_snapshot, _) in
10862                multi_buffer_snapshot.excerpts_in_ranges(self.selections.disjoint_anchor_ranges())
10863            {
10864                let buffer_id = buffer_snapshot.remote_id();
10865                if unfolded_buffers.insert(buffer_id) {
10866                    self.unfold_buffer(buffer_id, cx);
10867                }
10868            }
10869        }
10870    }
10871
10872    pub fn unfold_recursive(&mut self, _: &UnfoldRecursive, cx: &mut ViewContext<Self>) {
10873        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10874        let selections = self.selections.all::<Point>(cx);
10875        let ranges = selections
10876            .iter()
10877            .map(|s| {
10878                let mut range = s.display_range(&display_map).sorted();
10879                *range.start.column_mut() = 0;
10880                *range.end.column_mut() = display_map.line_len(range.end.row());
10881                let start = range.start.to_point(&display_map);
10882                let end = range.end.to_point(&display_map);
10883                start..end
10884            })
10885            .collect::<Vec<_>>();
10886
10887        self.unfold_ranges(&ranges, true, true, cx);
10888    }
10889
10890    pub fn unfold_at(&mut self, unfold_at: &UnfoldAt, cx: &mut ViewContext<Self>) {
10891        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10892
10893        let intersection_range = Point::new(unfold_at.buffer_row.0, 0)
10894            ..Point::new(
10895                unfold_at.buffer_row.0,
10896                display_map.buffer_snapshot.line_len(unfold_at.buffer_row),
10897            );
10898
10899        let autoscroll = self
10900            .selections
10901            .all::<Point>(cx)
10902            .iter()
10903            .any(|selection| RangeExt::overlaps(&selection.range(), &intersection_range));
10904
10905        self.unfold_ranges(&[intersection_range], true, autoscroll, cx)
10906    }
10907
10908    pub fn unfold_all(&mut self, _: &actions::UnfoldAll, cx: &mut ViewContext<Self>) {
10909        if self.buffer.read(cx).is_singleton() {
10910            let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10911            self.unfold_ranges(&[0..display_map.buffer_snapshot.len()], true, true, cx);
10912        } else {
10913            self.toggle_fold_multiple_buffers = cx.spawn(|editor, mut cx| async move {
10914                editor
10915                    .update(&mut cx, |editor, cx| {
10916                        for buffer_id in editor.buffer.read(cx).excerpt_buffer_ids() {
10917                            editor.unfold_buffer(buffer_id, cx);
10918                        }
10919                    })
10920                    .ok();
10921            });
10922        }
10923    }
10924
10925    pub fn fold_selected_ranges(&mut self, _: &FoldSelectedRanges, cx: &mut ViewContext<Self>) {
10926        let selections = self.selections.all::<Point>(cx);
10927        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10928        let line_mode = self.selections.line_mode;
10929        let ranges = selections
10930            .into_iter()
10931            .map(|s| {
10932                if line_mode {
10933                    let start = Point::new(s.start.row, 0);
10934                    let end = Point::new(
10935                        s.end.row,
10936                        display_map
10937                            .buffer_snapshot
10938                            .line_len(MultiBufferRow(s.end.row)),
10939                    );
10940                    Crease::simple(start..end, display_map.fold_placeholder.clone())
10941                } else {
10942                    Crease::simple(s.start..s.end, display_map.fold_placeholder.clone())
10943                }
10944            })
10945            .collect::<Vec<_>>();
10946        self.fold_creases(ranges, true, cx);
10947    }
10948
10949    pub fn fold_ranges<T: ToOffset + Clone>(
10950        &mut self,
10951        ranges: Vec<Range<T>>,
10952        auto_scroll: bool,
10953        cx: &mut ViewContext<Self>,
10954    ) {
10955        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10956        let ranges = ranges
10957            .into_iter()
10958            .map(|r| Crease::simple(r, display_map.fold_placeholder.clone()))
10959            .collect::<Vec<_>>();
10960        self.fold_creases(ranges, auto_scroll, cx);
10961    }
10962
10963    pub fn fold_creases<T: ToOffset + Clone>(
10964        &mut self,
10965        creases: Vec<Crease<T>>,
10966        auto_scroll: bool,
10967        cx: &mut ViewContext<Self>,
10968    ) {
10969        if creases.is_empty() {
10970            return;
10971        }
10972
10973        let mut buffers_affected = HashSet::default();
10974        let multi_buffer = self.buffer().read(cx);
10975        for crease in &creases {
10976            if let Some((_, buffer, _)) =
10977                multi_buffer.excerpt_containing(crease.range().start.clone(), cx)
10978            {
10979                buffers_affected.insert(buffer.read(cx).remote_id());
10980            };
10981        }
10982
10983        self.display_map.update(cx, |map, cx| map.fold(creases, cx));
10984
10985        if auto_scroll {
10986            self.request_autoscroll(Autoscroll::fit(), cx);
10987        }
10988
10989        for buffer_id in buffers_affected {
10990            Self::sync_expanded_diff_hunks(&mut self.diff_map, buffer_id, cx);
10991        }
10992
10993        cx.notify();
10994
10995        if let Some(active_diagnostics) = self.active_diagnostics.take() {
10996            // Clear diagnostics block when folding a range that contains it.
10997            let snapshot = self.snapshot(cx);
10998            if snapshot.intersects_fold(active_diagnostics.primary_range.start) {
10999                drop(snapshot);
11000                self.active_diagnostics = Some(active_diagnostics);
11001                self.dismiss_diagnostics(cx);
11002            } else {
11003                self.active_diagnostics = Some(active_diagnostics);
11004            }
11005        }
11006
11007        self.scrollbar_marker_state.dirty = true;
11008    }
11009
11010    /// Removes any folds whose ranges intersect any of the given ranges.
11011    pub fn unfold_ranges<T: ToOffset + Clone>(
11012        &mut self,
11013        ranges: &[Range<T>],
11014        inclusive: bool,
11015        auto_scroll: bool,
11016        cx: &mut ViewContext<Self>,
11017    ) {
11018        self.remove_folds_with(ranges, auto_scroll, cx, |map, cx| {
11019            map.unfold_intersecting(ranges.iter().cloned(), inclusive, cx)
11020        });
11021    }
11022
11023    pub fn fold_buffer(&mut self, buffer_id: BufferId, cx: &mut ViewContext<Self>) {
11024        if self.buffer().read(cx).is_singleton() || self.buffer_folded(buffer_id, cx) {
11025            return;
11026        }
11027        let Some(buffer) = self.buffer().read(cx).buffer(buffer_id) else {
11028            return;
11029        };
11030        let folded_excerpts = self.buffer().read(cx).excerpts_for_buffer(&buffer, cx);
11031        self.display_map
11032            .update(cx, |display_map, cx| display_map.fold_buffer(buffer_id, cx));
11033        cx.emit(EditorEvent::BufferFoldToggled {
11034            ids: folded_excerpts.iter().map(|&(id, _)| id).collect(),
11035            folded: true,
11036        });
11037        cx.notify();
11038    }
11039
11040    pub fn unfold_buffer(&mut self, buffer_id: BufferId, cx: &mut ViewContext<Self>) {
11041        if self.buffer().read(cx).is_singleton() || !self.buffer_folded(buffer_id, cx) {
11042            return;
11043        }
11044        let Some(buffer) = self.buffer().read(cx).buffer(buffer_id) else {
11045            return;
11046        };
11047        let unfolded_excerpts = self.buffer().read(cx).excerpts_for_buffer(&buffer, cx);
11048        self.display_map.update(cx, |display_map, cx| {
11049            display_map.unfold_buffer(buffer_id, cx);
11050        });
11051        cx.emit(EditorEvent::BufferFoldToggled {
11052            ids: unfolded_excerpts.iter().map(|&(id, _)| id).collect(),
11053            folded: false,
11054        });
11055        cx.notify();
11056    }
11057
11058    pub fn buffer_folded(&self, buffer: BufferId, cx: &AppContext) -> bool {
11059        self.display_map.read(cx).buffer_folded(buffer)
11060    }
11061
11062    /// Removes any folds with the given ranges.
11063    pub fn remove_folds_with_type<T: ToOffset + Clone>(
11064        &mut self,
11065        ranges: &[Range<T>],
11066        type_id: TypeId,
11067        auto_scroll: bool,
11068        cx: &mut ViewContext<Self>,
11069    ) {
11070        self.remove_folds_with(ranges, auto_scroll, cx, |map, cx| {
11071            map.remove_folds_with_type(ranges.iter().cloned(), type_id, cx)
11072        });
11073    }
11074
11075    fn remove_folds_with<T: ToOffset + Clone>(
11076        &mut self,
11077        ranges: &[Range<T>],
11078        auto_scroll: bool,
11079        cx: &mut ViewContext<Self>,
11080        update: impl FnOnce(&mut DisplayMap, &mut ModelContext<DisplayMap>),
11081    ) {
11082        if ranges.is_empty() {
11083            return;
11084        }
11085
11086        let mut buffers_affected = HashSet::default();
11087        let multi_buffer = self.buffer().read(cx);
11088        for range in ranges {
11089            if let Some((_, buffer, _)) = multi_buffer.excerpt_containing(range.start.clone(), cx) {
11090                buffers_affected.insert(buffer.read(cx).remote_id());
11091            };
11092        }
11093
11094        self.display_map.update(cx, update);
11095
11096        if auto_scroll {
11097            self.request_autoscroll(Autoscroll::fit(), cx);
11098        }
11099
11100        for buffer_id in buffers_affected {
11101            Self::sync_expanded_diff_hunks(&mut self.diff_map, buffer_id, cx);
11102        }
11103
11104        cx.notify();
11105        self.scrollbar_marker_state.dirty = true;
11106        self.active_indent_guides_state.dirty = true;
11107    }
11108
11109    pub fn default_fold_placeholder(&self, cx: &AppContext) -> FoldPlaceholder {
11110        self.display_map.read(cx).fold_placeholder.clone()
11111    }
11112
11113    pub fn set_gutter_hovered(&mut self, hovered: bool, cx: &mut ViewContext<Self>) {
11114        if hovered != self.gutter_hovered {
11115            self.gutter_hovered = hovered;
11116            cx.notify();
11117        }
11118    }
11119
11120    pub fn insert_blocks(
11121        &mut self,
11122        blocks: impl IntoIterator<Item = BlockProperties<Anchor>>,
11123        autoscroll: Option<Autoscroll>,
11124        cx: &mut ViewContext<Self>,
11125    ) -> Vec<CustomBlockId> {
11126        let blocks = self
11127            .display_map
11128            .update(cx, |display_map, cx| display_map.insert_blocks(blocks, cx));
11129        if let Some(autoscroll) = autoscroll {
11130            self.request_autoscroll(autoscroll, cx);
11131        }
11132        cx.notify();
11133        blocks
11134    }
11135
11136    pub fn resize_blocks(
11137        &mut self,
11138        heights: HashMap<CustomBlockId, u32>,
11139        autoscroll: Option<Autoscroll>,
11140        cx: &mut ViewContext<Self>,
11141    ) {
11142        self.display_map
11143            .update(cx, |display_map, cx| display_map.resize_blocks(heights, cx));
11144        if let Some(autoscroll) = autoscroll {
11145            self.request_autoscroll(autoscroll, cx);
11146        }
11147        cx.notify();
11148    }
11149
11150    pub fn replace_blocks(
11151        &mut self,
11152        renderers: HashMap<CustomBlockId, RenderBlock>,
11153        autoscroll: Option<Autoscroll>,
11154        cx: &mut ViewContext<Self>,
11155    ) {
11156        self.display_map
11157            .update(cx, |display_map, _cx| display_map.replace_blocks(renderers));
11158        if let Some(autoscroll) = autoscroll {
11159            self.request_autoscroll(autoscroll, cx);
11160        }
11161        cx.notify();
11162    }
11163
11164    pub fn remove_blocks(
11165        &mut self,
11166        block_ids: HashSet<CustomBlockId>,
11167        autoscroll: Option<Autoscroll>,
11168        cx: &mut ViewContext<Self>,
11169    ) {
11170        self.display_map.update(cx, |display_map, cx| {
11171            display_map.remove_blocks(block_ids, cx)
11172        });
11173        if let Some(autoscroll) = autoscroll {
11174            self.request_autoscroll(autoscroll, cx);
11175        }
11176        cx.notify();
11177    }
11178
11179    pub fn row_for_block(
11180        &self,
11181        block_id: CustomBlockId,
11182        cx: &mut ViewContext<Self>,
11183    ) -> Option<DisplayRow> {
11184        self.display_map
11185            .update(cx, |map, cx| map.row_for_block(block_id, cx))
11186    }
11187
11188    pub(crate) fn set_focused_block(&mut self, focused_block: FocusedBlock) {
11189        self.focused_block = Some(focused_block);
11190    }
11191
11192    pub(crate) fn take_focused_block(&mut self) -> Option<FocusedBlock> {
11193        self.focused_block.take()
11194    }
11195
11196    pub fn insert_creases(
11197        &mut self,
11198        creases: impl IntoIterator<Item = Crease<Anchor>>,
11199        cx: &mut ViewContext<Self>,
11200    ) -> Vec<CreaseId> {
11201        self.display_map
11202            .update(cx, |map, cx| map.insert_creases(creases, cx))
11203    }
11204
11205    pub fn remove_creases(
11206        &mut self,
11207        ids: impl IntoIterator<Item = CreaseId>,
11208        cx: &mut ViewContext<Self>,
11209    ) {
11210        self.display_map
11211            .update(cx, |map, cx| map.remove_creases(ids, cx));
11212    }
11213
11214    pub fn longest_row(&self, cx: &mut AppContext) -> DisplayRow {
11215        self.display_map
11216            .update(cx, |map, cx| map.snapshot(cx))
11217            .longest_row()
11218    }
11219
11220    pub fn max_point(&self, cx: &mut AppContext) -> DisplayPoint {
11221        self.display_map
11222            .update(cx, |map, cx| map.snapshot(cx))
11223            .max_point()
11224    }
11225
11226    pub fn text(&self, cx: &AppContext) -> String {
11227        self.buffer.read(cx).read(cx).text()
11228    }
11229
11230    pub fn text_option(&self, cx: &AppContext) -> Option<String> {
11231        let text = self.text(cx);
11232        let text = text.trim();
11233
11234        if text.is_empty() {
11235            return None;
11236        }
11237
11238        Some(text.to_string())
11239    }
11240
11241    pub fn set_text(&mut self, text: impl Into<Arc<str>>, cx: &mut ViewContext<Self>) {
11242        self.transact(cx, |this, cx| {
11243            this.buffer
11244                .read(cx)
11245                .as_singleton()
11246                .expect("you can only call set_text on editors for singleton buffers")
11247                .update(cx, |buffer, cx| buffer.set_text(text, cx));
11248        });
11249    }
11250
11251    pub fn display_text(&self, cx: &mut AppContext) -> String {
11252        self.display_map
11253            .update(cx, |map, cx| map.snapshot(cx))
11254            .text()
11255    }
11256
11257    pub fn wrap_guides(&self, cx: &AppContext) -> SmallVec<[(usize, bool); 2]> {
11258        let mut wrap_guides = smallvec::smallvec![];
11259
11260        if self.show_wrap_guides == Some(false) {
11261            return wrap_guides;
11262        }
11263
11264        let settings = self.buffer.read(cx).settings_at(0, cx);
11265        if settings.show_wrap_guides {
11266            if let SoftWrap::Column(soft_wrap) = self.soft_wrap_mode(cx) {
11267                wrap_guides.push((soft_wrap as usize, true));
11268            } else if let SoftWrap::Bounded(soft_wrap) = self.soft_wrap_mode(cx) {
11269                wrap_guides.push((soft_wrap as usize, true));
11270            }
11271            wrap_guides.extend(settings.wrap_guides.iter().map(|guide| (*guide, false)))
11272        }
11273
11274        wrap_guides
11275    }
11276
11277    pub fn soft_wrap_mode(&self, cx: &AppContext) -> SoftWrap {
11278        let settings = self.buffer.read(cx).settings_at(0, cx);
11279        let mode = self.soft_wrap_mode_override.unwrap_or(settings.soft_wrap);
11280        match mode {
11281            language_settings::SoftWrap::PreferLine | language_settings::SoftWrap::None => {
11282                SoftWrap::None
11283            }
11284            language_settings::SoftWrap::EditorWidth => SoftWrap::EditorWidth,
11285            language_settings::SoftWrap::PreferredLineLength => {
11286                SoftWrap::Column(settings.preferred_line_length)
11287            }
11288            language_settings::SoftWrap::Bounded => {
11289                SoftWrap::Bounded(settings.preferred_line_length)
11290            }
11291        }
11292    }
11293
11294    pub fn set_soft_wrap_mode(
11295        &mut self,
11296        mode: language_settings::SoftWrap,
11297        cx: &mut ViewContext<Self>,
11298    ) {
11299        self.soft_wrap_mode_override = Some(mode);
11300        cx.notify();
11301    }
11302
11303    pub fn set_text_style_refinement(&mut self, style: TextStyleRefinement) {
11304        self.text_style_refinement = Some(style);
11305    }
11306
11307    /// called by the Element so we know what style we were most recently rendered with.
11308    pub(crate) fn set_style(&mut self, style: EditorStyle, cx: &mut ViewContext<Self>) {
11309        let rem_size = cx.rem_size();
11310        self.display_map.update(cx, |map, cx| {
11311            map.set_font(
11312                style.text.font(),
11313                style.text.font_size.to_pixels(rem_size),
11314                cx,
11315            )
11316        });
11317        self.style = Some(style);
11318    }
11319
11320    pub fn style(&self) -> Option<&EditorStyle> {
11321        self.style.as_ref()
11322    }
11323
11324    // Called by the element. This method is not designed to be called outside of the editor
11325    // element's layout code because it does not notify when rewrapping is computed synchronously.
11326    pub(crate) fn set_wrap_width(&self, width: Option<Pixels>, cx: &mut AppContext) -> bool {
11327        self.display_map
11328            .update(cx, |map, cx| map.set_wrap_width(width, cx))
11329    }
11330
11331    pub fn toggle_soft_wrap(&mut self, _: &ToggleSoftWrap, cx: &mut ViewContext<Self>) {
11332        if self.soft_wrap_mode_override.is_some() {
11333            self.soft_wrap_mode_override.take();
11334        } else {
11335            let soft_wrap = match self.soft_wrap_mode(cx) {
11336                SoftWrap::GitDiff => return,
11337                SoftWrap::None => language_settings::SoftWrap::EditorWidth,
11338                SoftWrap::EditorWidth | SoftWrap::Column(_) | SoftWrap::Bounded(_) => {
11339                    language_settings::SoftWrap::None
11340                }
11341            };
11342            self.soft_wrap_mode_override = Some(soft_wrap);
11343        }
11344        cx.notify();
11345    }
11346
11347    pub fn toggle_tab_bar(&mut self, _: &ToggleTabBar, cx: &mut ViewContext<Self>) {
11348        let Some(workspace) = self.workspace() else {
11349            return;
11350        };
11351        let fs = workspace.read(cx).app_state().fs.clone();
11352        let current_show = TabBarSettings::get_global(cx).show;
11353        update_settings_file::<TabBarSettings>(fs, cx, move |setting, _| {
11354            setting.show = Some(!current_show);
11355        });
11356    }
11357
11358    pub fn toggle_indent_guides(&mut self, _: &ToggleIndentGuides, cx: &mut ViewContext<Self>) {
11359        let currently_enabled = self.should_show_indent_guides().unwrap_or_else(|| {
11360            self.buffer
11361                .read(cx)
11362                .settings_at(0, cx)
11363                .indent_guides
11364                .enabled
11365        });
11366        self.show_indent_guides = Some(!currently_enabled);
11367        cx.notify();
11368    }
11369
11370    fn should_show_indent_guides(&self) -> Option<bool> {
11371        self.show_indent_guides
11372    }
11373
11374    pub fn toggle_line_numbers(&mut self, _: &ToggleLineNumbers, cx: &mut ViewContext<Self>) {
11375        let mut editor_settings = EditorSettings::get_global(cx).clone();
11376        editor_settings.gutter.line_numbers = !editor_settings.gutter.line_numbers;
11377        EditorSettings::override_global(editor_settings, cx);
11378    }
11379
11380    pub fn should_use_relative_line_numbers(&self, cx: &WindowContext) -> bool {
11381        self.use_relative_line_numbers
11382            .unwrap_or(EditorSettings::get_global(cx).relative_line_numbers)
11383    }
11384
11385    pub fn toggle_relative_line_numbers(
11386        &mut self,
11387        _: &ToggleRelativeLineNumbers,
11388        cx: &mut ViewContext<Self>,
11389    ) {
11390        let is_relative = self.should_use_relative_line_numbers(cx);
11391        self.set_relative_line_number(Some(!is_relative), cx)
11392    }
11393
11394    pub fn set_relative_line_number(
11395        &mut self,
11396        is_relative: Option<bool>,
11397        cx: &mut ViewContext<Self>,
11398    ) {
11399        self.use_relative_line_numbers = is_relative;
11400        cx.notify();
11401    }
11402
11403    pub fn set_show_gutter(&mut self, show_gutter: bool, cx: &mut ViewContext<Self>) {
11404        self.show_gutter = show_gutter;
11405        cx.notify();
11406    }
11407
11408    pub fn set_show_scrollbars(&mut self, show_scrollbars: bool, cx: &mut ViewContext<Self>) {
11409        self.show_scrollbars = show_scrollbars;
11410        cx.notify();
11411    }
11412
11413    pub fn set_show_line_numbers(&mut self, show_line_numbers: bool, cx: &mut ViewContext<Self>) {
11414        self.show_line_numbers = Some(show_line_numbers);
11415        cx.notify();
11416    }
11417
11418    pub fn set_show_git_diff_gutter(
11419        &mut self,
11420        show_git_diff_gutter: bool,
11421        cx: &mut ViewContext<Self>,
11422    ) {
11423        self.show_git_diff_gutter = Some(show_git_diff_gutter);
11424        cx.notify();
11425    }
11426
11427    pub fn set_show_code_actions(&mut self, show_code_actions: bool, cx: &mut ViewContext<Self>) {
11428        self.show_code_actions = Some(show_code_actions);
11429        cx.notify();
11430    }
11431
11432    pub fn set_show_runnables(&mut self, show_runnables: bool, cx: &mut ViewContext<Self>) {
11433        self.show_runnables = Some(show_runnables);
11434        cx.notify();
11435    }
11436
11437    pub fn set_masked(&mut self, masked: bool, cx: &mut ViewContext<Self>) {
11438        if self.display_map.read(cx).masked != masked {
11439            self.display_map.update(cx, |map, _| map.masked = masked);
11440        }
11441        cx.notify()
11442    }
11443
11444    pub fn set_show_wrap_guides(&mut self, show_wrap_guides: bool, cx: &mut ViewContext<Self>) {
11445        self.show_wrap_guides = Some(show_wrap_guides);
11446        cx.notify();
11447    }
11448
11449    pub fn set_show_indent_guides(&mut self, show_indent_guides: bool, cx: &mut ViewContext<Self>) {
11450        self.show_indent_guides = Some(show_indent_guides);
11451        cx.notify();
11452    }
11453
11454    pub fn working_directory(&self, cx: &WindowContext) -> Option<PathBuf> {
11455        if let Some(buffer) = self.buffer().read(cx).as_singleton() {
11456            if let Some(file) = buffer.read(cx).file().and_then(|f| f.as_local()) {
11457                if let Some(dir) = file.abs_path(cx).parent() {
11458                    return Some(dir.to_owned());
11459                }
11460            }
11461
11462            if let Some(project_path) = buffer.read(cx).project_path(cx) {
11463                return Some(project_path.path.to_path_buf());
11464            }
11465        }
11466
11467        None
11468    }
11469
11470    fn target_file<'a>(&self, cx: &'a AppContext) -> Option<&'a dyn language::LocalFile> {
11471        self.active_excerpt(cx)?
11472            .1
11473            .read(cx)
11474            .file()
11475            .and_then(|f| f.as_local())
11476    }
11477
11478    pub fn reveal_in_finder(&mut self, _: &RevealInFileManager, cx: &mut ViewContext<Self>) {
11479        if let Some(target) = self.target_file(cx) {
11480            cx.reveal_path(&target.abs_path(cx));
11481        }
11482    }
11483
11484    pub fn copy_path(&mut self, _: &CopyPath, cx: &mut ViewContext<Self>) {
11485        if let Some(file) = self.target_file(cx) {
11486            if let Some(path) = file.abs_path(cx).to_str() {
11487                cx.write_to_clipboard(ClipboardItem::new_string(path.to_string()));
11488            }
11489        }
11490    }
11491
11492    pub fn copy_relative_path(&mut self, _: &CopyRelativePath, cx: &mut ViewContext<Self>) {
11493        if let Some(file) = self.target_file(cx) {
11494            if let Some(path) = file.path().to_str() {
11495                cx.write_to_clipboard(ClipboardItem::new_string(path.to_string()));
11496            }
11497        }
11498    }
11499
11500    pub fn toggle_git_blame(&mut self, _: &ToggleGitBlame, cx: &mut ViewContext<Self>) {
11501        self.show_git_blame_gutter = !self.show_git_blame_gutter;
11502
11503        if self.show_git_blame_gutter && !self.has_blame_entries(cx) {
11504            self.start_git_blame(true, cx);
11505        }
11506
11507        cx.notify();
11508    }
11509
11510    pub fn toggle_git_blame_inline(
11511        &mut self,
11512        _: &ToggleGitBlameInline,
11513        cx: &mut ViewContext<Self>,
11514    ) {
11515        self.toggle_git_blame_inline_internal(true, cx);
11516        cx.notify();
11517    }
11518
11519    pub fn git_blame_inline_enabled(&self) -> bool {
11520        self.git_blame_inline_enabled
11521    }
11522
11523    pub fn toggle_selection_menu(&mut self, _: &ToggleSelectionMenu, cx: &mut ViewContext<Self>) {
11524        self.show_selection_menu = self
11525            .show_selection_menu
11526            .map(|show_selections_menu| !show_selections_menu)
11527            .or_else(|| Some(!EditorSettings::get_global(cx).toolbar.selections_menu));
11528
11529        cx.notify();
11530    }
11531
11532    pub fn selection_menu_enabled(&self, cx: &AppContext) -> bool {
11533        self.show_selection_menu
11534            .unwrap_or_else(|| EditorSettings::get_global(cx).toolbar.selections_menu)
11535    }
11536
11537    fn start_git_blame(&mut self, user_triggered: bool, cx: &mut ViewContext<Self>) {
11538        if let Some(project) = self.project.as_ref() {
11539            let Some(buffer) = self.buffer().read(cx).as_singleton() else {
11540                return;
11541            };
11542
11543            if buffer.read(cx).file().is_none() {
11544                return;
11545            }
11546
11547            let focused = self.focus_handle(cx).contains_focused(cx);
11548
11549            let project = project.clone();
11550            let blame =
11551                cx.new_model(|cx| GitBlame::new(buffer, project, user_triggered, focused, cx));
11552            self.blame_subscription = Some(cx.observe(&blame, |_, _, cx| cx.notify()));
11553            self.blame = Some(blame);
11554        }
11555    }
11556
11557    fn toggle_git_blame_inline_internal(
11558        &mut self,
11559        user_triggered: bool,
11560        cx: &mut ViewContext<Self>,
11561    ) {
11562        if self.git_blame_inline_enabled {
11563            self.git_blame_inline_enabled = false;
11564            self.show_git_blame_inline = false;
11565            self.show_git_blame_inline_delay_task.take();
11566        } else {
11567            self.git_blame_inline_enabled = true;
11568            self.start_git_blame_inline(user_triggered, cx);
11569        }
11570
11571        cx.notify();
11572    }
11573
11574    fn start_git_blame_inline(&mut self, user_triggered: bool, cx: &mut ViewContext<Self>) {
11575        self.start_git_blame(user_triggered, cx);
11576
11577        if ProjectSettings::get_global(cx)
11578            .git
11579            .inline_blame_delay()
11580            .is_some()
11581        {
11582            self.start_inline_blame_timer(cx);
11583        } else {
11584            self.show_git_blame_inline = true
11585        }
11586    }
11587
11588    pub fn blame(&self) -> Option<&Model<GitBlame>> {
11589        self.blame.as_ref()
11590    }
11591
11592    pub fn show_git_blame_gutter(&self) -> bool {
11593        self.show_git_blame_gutter
11594    }
11595
11596    pub fn render_git_blame_gutter(&mut self, cx: &mut WindowContext) -> bool {
11597        self.show_git_blame_gutter && self.has_blame_entries(cx)
11598    }
11599
11600    pub fn render_git_blame_inline(&mut self, cx: &mut WindowContext) -> bool {
11601        self.show_git_blame_inline
11602            && self.focus_handle.is_focused(cx)
11603            && !self.newest_selection_head_on_empty_line(cx)
11604            && self.has_blame_entries(cx)
11605    }
11606
11607    fn has_blame_entries(&self, cx: &mut WindowContext) -> bool {
11608        self.blame()
11609            .map_or(false, |blame| blame.read(cx).has_generated_entries())
11610    }
11611
11612    fn newest_selection_head_on_empty_line(&mut self, cx: &mut WindowContext) -> bool {
11613        let cursor_anchor = self.selections.newest_anchor().head();
11614
11615        let snapshot = self.buffer.read(cx).snapshot(cx);
11616        let buffer_row = MultiBufferRow(cursor_anchor.to_point(&snapshot).row);
11617
11618        snapshot.line_len(buffer_row) == 0
11619    }
11620
11621    fn get_permalink_to_line(&mut self, cx: &mut ViewContext<Self>) -> Task<Result<url::Url>> {
11622        let buffer_and_selection = maybe!({
11623            let selection = self.selections.newest::<Point>(cx);
11624            let selection_range = selection.range();
11625
11626            let (buffer, selection) = if let Some(buffer) = self.buffer().read(cx).as_singleton() {
11627                (buffer, selection_range.start.row..selection_range.end.row)
11628            } else {
11629                let multi_buffer = self.buffer().read(cx);
11630                let multi_buffer_snapshot = multi_buffer.snapshot(cx);
11631                let buffer_ranges = multi_buffer_snapshot.range_to_buffer_ranges(selection_range);
11632
11633                let (excerpt, range) = if selection.reversed {
11634                    buffer_ranges.first()
11635                } else {
11636                    buffer_ranges.last()
11637                }?;
11638
11639                let snapshot = excerpt.buffer();
11640                let selection = text::ToPoint::to_point(&range.start, &snapshot).row
11641                    ..text::ToPoint::to_point(&range.end, &snapshot).row;
11642                (
11643                    multi_buffer.buffer(excerpt.buffer_id()).unwrap().clone(),
11644                    selection,
11645                )
11646            };
11647
11648            Some((buffer, selection))
11649        });
11650
11651        let Some((buffer, selection)) = buffer_and_selection else {
11652            return Task::ready(Err(anyhow!("failed to determine buffer and selection")));
11653        };
11654
11655        let Some(project) = self.project.as_ref() else {
11656            return Task::ready(Err(anyhow!("editor does not have project")));
11657        };
11658
11659        project.update(cx, |project, cx| {
11660            project.get_permalink_to_line(&buffer, selection, cx)
11661        })
11662    }
11663
11664    pub fn copy_permalink_to_line(&mut self, _: &CopyPermalinkToLine, cx: &mut ViewContext<Self>) {
11665        let permalink_task = self.get_permalink_to_line(cx);
11666        let workspace = self.workspace();
11667
11668        cx.spawn(|_, mut cx| async move {
11669            match permalink_task.await {
11670                Ok(permalink) => {
11671                    cx.update(|cx| {
11672                        cx.write_to_clipboard(ClipboardItem::new_string(permalink.to_string()));
11673                    })
11674                    .ok();
11675                }
11676                Err(err) => {
11677                    let message = format!("Failed to copy permalink: {err}");
11678
11679                    Err::<(), anyhow::Error>(err).log_err();
11680
11681                    if let Some(workspace) = workspace {
11682                        workspace
11683                            .update(&mut cx, |workspace, cx| {
11684                                struct CopyPermalinkToLine;
11685
11686                                workspace.show_toast(
11687                                    Toast::new(
11688                                        NotificationId::unique::<CopyPermalinkToLine>(),
11689                                        message,
11690                                    ),
11691                                    cx,
11692                                )
11693                            })
11694                            .ok();
11695                    }
11696                }
11697            }
11698        })
11699        .detach();
11700    }
11701
11702    pub fn copy_file_location(&mut self, _: &CopyFileLocation, cx: &mut ViewContext<Self>) {
11703        let selection = self.selections.newest::<Point>(cx).start.row + 1;
11704        if let Some(file) = self.target_file(cx) {
11705            if let Some(path) = file.path().to_str() {
11706                cx.write_to_clipboard(ClipboardItem::new_string(format!("{path}:{selection}")));
11707            }
11708        }
11709    }
11710
11711    pub fn open_permalink_to_line(&mut self, _: &OpenPermalinkToLine, cx: &mut ViewContext<Self>) {
11712        let permalink_task = self.get_permalink_to_line(cx);
11713        let workspace = self.workspace();
11714
11715        cx.spawn(|_, mut cx| async move {
11716            match permalink_task.await {
11717                Ok(permalink) => {
11718                    cx.update(|cx| {
11719                        cx.open_url(permalink.as_ref());
11720                    })
11721                    .ok();
11722                }
11723                Err(err) => {
11724                    let message = format!("Failed to open permalink: {err}");
11725
11726                    Err::<(), anyhow::Error>(err).log_err();
11727
11728                    if let Some(workspace) = workspace {
11729                        workspace
11730                            .update(&mut cx, |workspace, cx| {
11731                                struct OpenPermalinkToLine;
11732
11733                                workspace.show_toast(
11734                                    Toast::new(
11735                                        NotificationId::unique::<OpenPermalinkToLine>(),
11736                                        message,
11737                                    ),
11738                                    cx,
11739                                )
11740                            })
11741                            .ok();
11742                    }
11743                }
11744            }
11745        })
11746        .detach();
11747    }
11748
11749    pub fn insert_uuid_v4(&mut self, _: &InsertUuidV4, cx: &mut ViewContext<Self>) {
11750        self.insert_uuid(UuidVersion::V4, cx);
11751    }
11752
11753    pub fn insert_uuid_v7(&mut self, _: &InsertUuidV7, cx: &mut ViewContext<Self>) {
11754        self.insert_uuid(UuidVersion::V7, cx);
11755    }
11756
11757    fn insert_uuid(&mut self, version: UuidVersion, cx: &mut ViewContext<Self>) {
11758        self.transact(cx, |this, cx| {
11759            let edits = this
11760                .selections
11761                .all::<Point>(cx)
11762                .into_iter()
11763                .map(|selection| {
11764                    let uuid = match version {
11765                        UuidVersion::V4 => uuid::Uuid::new_v4(),
11766                        UuidVersion::V7 => uuid::Uuid::now_v7(),
11767                    };
11768
11769                    (selection.range(), uuid.to_string())
11770                });
11771            this.edit(edits, cx);
11772            this.refresh_inline_completion(true, false, cx);
11773        });
11774    }
11775
11776    /// Adds a row highlight for the given range. If a row has multiple highlights, the
11777    /// last highlight added will be used.
11778    ///
11779    /// If the range ends at the beginning of a line, then that line will not be highlighted.
11780    pub fn highlight_rows<T: 'static>(
11781        &mut self,
11782        range: Range<Anchor>,
11783        color: Hsla,
11784        should_autoscroll: bool,
11785        cx: &mut ViewContext<Self>,
11786    ) {
11787        let snapshot = self.buffer().read(cx).snapshot(cx);
11788        let row_highlights = self.highlighted_rows.entry(TypeId::of::<T>()).or_default();
11789        let ix = row_highlights.binary_search_by(|highlight| {
11790            Ordering::Equal
11791                .then_with(|| highlight.range.start.cmp(&range.start, &snapshot))
11792                .then_with(|| highlight.range.end.cmp(&range.end, &snapshot))
11793        });
11794
11795        if let Err(mut ix) = ix {
11796            let index = post_inc(&mut self.highlight_order);
11797
11798            // If this range intersects with the preceding highlight, then merge it with
11799            // the preceding highlight. Otherwise insert a new highlight.
11800            let mut merged = false;
11801            if ix > 0 {
11802                let prev_highlight = &mut row_highlights[ix - 1];
11803                if prev_highlight
11804                    .range
11805                    .end
11806                    .cmp(&range.start, &snapshot)
11807                    .is_ge()
11808                {
11809                    ix -= 1;
11810                    if prev_highlight.range.end.cmp(&range.end, &snapshot).is_lt() {
11811                        prev_highlight.range.end = range.end;
11812                    }
11813                    merged = true;
11814                    prev_highlight.index = index;
11815                    prev_highlight.color = color;
11816                    prev_highlight.should_autoscroll = should_autoscroll;
11817                }
11818            }
11819
11820            if !merged {
11821                row_highlights.insert(
11822                    ix,
11823                    RowHighlight {
11824                        range: range.clone(),
11825                        index,
11826                        color,
11827                        should_autoscroll,
11828                    },
11829                );
11830            }
11831
11832            // If any of the following highlights intersect with this one, merge them.
11833            while let Some(next_highlight) = row_highlights.get(ix + 1) {
11834                let highlight = &row_highlights[ix];
11835                if next_highlight
11836                    .range
11837                    .start
11838                    .cmp(&highlight.range.end, &snapshot)
11839                    .is_le()
11840                {
11841                    if next_highlight
11842                        .range
11843                        .end
11844                        .cmp(&highlight.range.end, &snapshot)
11845                        .is_gt()
11846                    {
11847                        row_highlights[ix].range.end = next_highlight.range.end;
11848                    }
11849                    row_highlights.remove(ix + 1);
11850                } else {
11851                    break;
11852                }
11853            }
11854        }
11855    }
11856
11857    /// Remove any highlighted row ranges of the given type that intersect the
11858    /// given ranges.
11859    pub fn remove_highlighted_rows<T: 'static>(
11860        &mut self,
11861        ranges_to_remove: Vec<Range<Anchor>>,
11862        cx: &mut ViewContext<Self>,
11863    ) {
11864        let snapshot = self.buffer().read(cx).snapshot(cx);
11865        let row_highlights = self.highlighted_rows.entry(TypeId::of::<T>()).or_default();
11866        let mut ranges_to_remove = ranges_to_remove.iter().peekable();
11867        row_highlights.retain(|highlight| {
11868            while let Some(range_to_remove) = ranges_to_remove.peek() {
11869                match range_to_remove.end.cmp(&highlight.range.start, &snapshot) {
11870                    Ordering::Less | Ordering::Equal => {
11871                        ranges_to_remove.next();
11872                    }
11873                    Ordering::Greater => {
11874                        match range_to_remove.start.cmp(&highlight.range.end, &snapshot) {
11875                            Ordering::Less | Ordering::Equal => {
11876                                return false;
11877                            }
11878                            Ordering::Greater => break,
11879                        }
11880                    }
11881                }
11882            }
11883
11884            true
11885        })
11886    }
11887
11888    /// Clear all anchor ranges for a certain highlight context type, so no corresponding rows will be highlighted.
11889    pub fn clear_row_highlights<T: 'static>(&mut self) {
11890        self.highlighted_rows.remove(&TypeId::of::<T>());
11891    }
11892
11893    /// For a highlight given context type, gets all anchor ranges that will be used for row highlighting.
11894    pub fn highlighted_rows<T: 'static>(&self) -> impl '_ + Iterator<Item = (Range<Anchor>, Hsla)> {
11895        self.highlighted_rows
11896            .get(&TypeId::of::<T>())
11897            .map_or(&[] as &[_], |vec| vec.as_slice())
11898            .iter()
11899            .map(|highlight| (highlight.range.clone(), highlight.color))
11900    }
11901
11902    /// Merges all anchor ranges for all context types ever set, picking the last highlight added in case of a row conflict.
11903    /// Returns a map of display rows that are highlighted and their corresponding highlight color.
11904    /// Allows to ignore certain kinds of highlights.
11905    pub fn highlighted_display_rows(
11906        &mut self,
11907        cx: &mut WindowContext,
11908    ) -> BTreeMap<DisplayRow, Hsla> {
11909        let snapshot = self.snapshot(cx);
11910        let mut used_highlight_orders = HashMap::default();
11911        self.highlighted_rows
11912            .iter()
11913            .flat_map(|(_, highlighted_rows)| highlighted_rows.iter())
11914            .fold(
11915                BTreeMap::<DisplayRow, Hsla>::new(),
11916                |mut unique_rows, highlight| {
11917                    let start = highlight.range.start.to_display_point(&snapshot);
11918                    let end = highlight.range.end.to_display_point(&snapshot);
11919                    let start_row = start.row().0;
11920                    let end_row = if highlight.range.end.text_anchor != text::Anchor::MAX
11921                        && end.column() == 0
11922                    {
11923                        end.row().0.saturating_sub(1)
11924                    } else {
11925                        end.row().0
11926                    };
11927                    for row in start_row..=end_row {
11928                        let used_index =
11929                            used_highlight_orders.entry(row).or_insert(highlight.index);
11930                        if highlight.index >= *used_index {
11931                            *used_index = highlight.index;
11932                            unique_rows.insert(DisplayRow(row), highlight.color);
11933                        }
11934                    }
11935                    unique_rows
11936                },
11937            )
11938    }
11939
11940    pub fn highlighted_display_row_for_autoscroll(
11941        &self,
11942        snapshot: &DisplaySnapshot,
11943    ) -> Option<DisplayRow> {
11944        self.highlighted_rows
11945            .values()
11946            .flat_map(|highlighted_rows| highlighted_rows.iter())
11947            .filter_map(|highlight| {
11948                if highlight.should_autoscroll {
11949                    Some(highlight.range.start.to_display_point(snapshot).row())
11950                } else {
11951                    None
11952                }
11953            })
11954            .min()
11955    }
11956
11957    pub fn set_search_within_ranges(
11958        &mut self,
11959        ranges: &[Range<Anchor>],
11960        cx: &mut ViewContext<Self>,
11961    ) {
11962        self.highlight_background::<SearchWithinRange>(
11963            ranges,
11964            |colors| colors.editor_document_highlight_read_background,
11965            cx,
11966        )
11967    }
11968
11969    pub fn set_breadcrumb_header(&mut self, new_header: String) {
11970        self.breadcrumb_header = Some(new_header);
11971    }
11972
11973    pub fn clear_search_within_ranges(&mut self, cx: &mut ViewContext<Self>) {
11974        self.clear_background_highlights::<SearchWithinRange>(cx);
11975    }
11976
11977    pub fn highlight_background<T: 'static>(
11978        &mut self,
11979        ranges: &[Range<Anchor>],
11980        color_fetcher: fn(&ThemeColors) -> Hsla,
11981        cx: &mut ViewContext<Self>,
11982    ) {
11983        self.background_highlights
11984            .insert(TypeId::of::<T>(), (color_fetcher, Arc::from(ranges)));
11985        self.scrollbar_marker_state.dirty = true;
11986        cx.notify();
11987    }
11988
11989    pub fn clear_background_highlights<T: 'static>(
11990        &mut self,
11991        cx: &mut ViewContext<Self>,
11992    ) -> Option<BackgroundHighlight> {
11993        let text_highlights = self.background_highlights.remove(&TypeId::of::<T>())?;
11994        if !text_highlights.1.is_empty() {
11995            self.scrollbar_marker_state.dirty = true;
11996            cx.notify();
11997        }
11998        Some(text_highlights)
11999    }
12000
12001    pub fn highlight_gutter<T: 'static>(
12002        &mut self,
12003        ranges: &[Range<Anchor>],
12004        color_fetcher: fn(&AppContext) -> Hsla,
12005        cx: &mut ViewContext<Self>,
12006    ) {
12007        self.gutter_highlights
12008            .insert(TypeId::of::<T>(), (color_fetcher, Arc::from(ranges)));
12009        cx.notify();
12010    }
12011
12012    pub fn clear_gutter_highlights<T: 'static>(
12013        &mut self,
12014        cx: &mut ViewContext<Self>,
12015    ) -> Option<GutterHighlight> {
12016        cx.notify();
12017        self.gutter_highlights.remove(&TypeId::of::<T>())
12018    }
12019
12020    #[cfg(feature = "test-support")]
12021    pub fn all_text_background_highlights(
12022        &mut self,
12023        cx: &mut ViewContext<Self>,
12024    ) -> Vec<(Range<DisplayPoint>, Hsla)> {
12025        let snapshot = self.snapshot(cx);
12026        let buffer = &snapshot.buffer_snapshot;
12027        let start = buffer.anchor_before(0);
12028        let end = buffer.anchor_after(buffer.len());
12029        let theme = cx.theme().colors();
12030        self.background_highlights_in_range(start..end, &snapshot, theme)
12031    }
12032
12033    #[cfg(feature = "test-support")]
12034    pub fn search_background_highlights(
12035        &mut self,
12036        cx: &mut ViewContext<Self>,
12037    ) -> Vec<Range<Point>> {
12038        let snapshot = self.buffer().read(cx).snapshot(cx);
12039
12040        let highlights = self
12041            .background_highlights
12042            .get(&TypeId::of::<items::BufferSearchHighlights>());
12043
12044        if let Some((_color, ranges)) = highlights {
12045            ranges
12046                .iter()
12047                .map(|range| range.start.to_point(&snapshot)..range.end.to_point(&snapshot))
12048                .collect_vec()
12049        } else {
12050            vec![]
12051        }
12052    }
12053
12054    fn document_highlights_for_position<'a>(
12055        &'a self,
12056        position: Anchor,
12057        buffer: &'a MultiBufferSnapshot,
12058    ) -> impl 'a + Iterator<Item = &'a Range<Anchor>> {
12059        let read_highlights = self
12060            .background_highlights
12061            .get(&TypeId::of::<DocumentHighlightRead>())
12062            .map(|h| &h.1);
12063        let write_highlights = self
12064            .background_highlights
12065            .get(&TypeId::of::<DocumentHighlightWrite>())
12066            .map(|h| &h.1);
12067        let left_position = position.bias_left(buffer);
12068        let right_position = position.bias_right(buffer);
12069        read_highlights
12070            .into_iter()
12071            .chain(write_highlights)
12072            .flat_map(move |ranges| {
12073                let start_ix = match ranges.binary_search_by(|probe| {
12074                    let cmp = probe.end.cmp(&left_position, buffer);
12075                    if cmp.is_ge() {
12076                        Ordering::Greater
12077                    } else {
12078                        Ordering::Less
12079                    }
12080                }) {
12081                    Ok(i) | Err(i) => i,
12082                };
12083
12084                ranges[start_ix..]
12085                    .iter()
12086                    .take_while(move |range| range.start.cmp(&right_position, buffer).is_le())
12087            })
12088    }
12089
12090    pub fn has_background_highlights<T: 'static>(&self) -> bool {
12091        self.background_highlights
12092            .get(&TypeId::of::<T>())
12093            .map_or(false, |(_, highlights)| !highlights.is_empty())
12094    }
12095
12096    pub fn background_highlights_in_range(
12097        &self,
12098        search_range: Range<Anchor>,
12099        display_snapshot: &DisplaySnapshot,
12100        theme: &ThemeColors,
12101    ) -> Vec<(Range<DisplayPoint>, Hsla)> {
12102        let mut results = Vec::new();
12103        for (color_fetcher, ranges) in self.background_highlights.values() {
12104            let color = color_fetcher(theme);
12105            let start_ix = match ranges.binary_search_by(|probe| {
12106                let cmp = probe
12107                    .end
12108                    .cmp(&search_range.start, &display_snapshot.buffer_snapshot);
12109                if cmp.is_gt() {
12110                    Ordering::Greater
12111                } else {
12112                    Ordering::Less
12113                }
12114            }) {
12115                Ok(i) | Err(i) => i,
12116            };
12117            for range in &ranges[start_ix..] {
12118                if range
12119                    .start
12120                    .cmp(&search_range.end, &display_snapshot.buffer_snapshot)
12121                    .is_ge()
12122                {
12123                    break;
12124                }
12125
12126                let start = range.start.to_display_point(display_snapshot);
12127                let end = range.end.to_display_point(display_snapshot);
12128                results.push((start..end, color))
12129            }
12130        }
12131        results
12132    }
12133
12134    pub fn background_highlight_row_ranges<T: 'static>(
12135        &self,
12136        search_range: Range<Anchor>,
12137        display_snapshot: &DisplaySnapshot,
12138        count: usize,
12139    ) -> Vec<RangeInclusive<DisplayPoint>> {
12140        let mut results = Vec::new();
12141        let Some((_, ranges)) = self.background_highlights.get(&TypeId::of::<T>()) else {
12142            return vec![];
12143        };
12144
12145        let start_ix = match ranges.binary_search_by(|probe| {
12146            let cmp = probe
12147                .end
12148                .cmp(&search_range.start, &display_snapshot.buffer_snapshot);
12149            if cmp.is_gt() {
12150                Ordering::Greater
12151            } else {
12152                Ordering::Less
12153            }
12154        }) {
12155            Ok(i) | Err(i) => i,
12156        };
12157        let mut push_region = |start: Option<Point>, end: Option<Point>| {
12158            if let (Some(start_display), Some(end_display)) = (start, end) {
12159                results.push(
12160                    start_display.to_display_point(display_snapshot)
12161                        ..=end_display.to_display_point(display_snapshot),
12162                );
12163            }
12164        };
12165        let mut start_row: Option<Point> = None;
12166        let mut end_row: Option<Point> = None;
12167        if ranges.len() > count {
12168            return Vec::new();
12169        }
12170        for range in &ranges[start_ix..] {
12171            if range
12172                .start
12173                .cmp(&search_range.end, &display_snapshot.buffer_snapshot)
12174                .is_ge()
12175            {
12176                break;
12177            }
12178            let end = range.end.to_point(&display_snapshot.buffer_snapshot);
12179            if let Some(current_row) = &end_row {
12180                if end.row == current_row.row {
12181                    continue;
12182                }
12183            }
12184            let start = range.start.to_point(&display_snapshot.buffer_snapshot);
12185            if start_row.is_none() {
12186                assert_eq!(end_row, None);
12187                start_row = Some(start);
12188                end_row = Some(end);
12189                continue;
12190            }
12191            if let Some(current_end) = end_row.as_mut() {
12192                if start.row > current_end.row + 1 {
12193                    push_region(start_row, end_row);
12194                    start_row = Some(start);
12195                    end_row = Some(end);
12196                } else {
12197                    // Merge two hunks.
12198                    *current_end = end;
12199                }
12200            } else {
12201                unreachable!();
12202            }
12203        }
12204        // We might still have a hunk that was not rendered (if there was a search hit on the last line)
12205        push_region(start_row, end_row);
12206        results
12207    }
12208
12209    pub fn gutter_highlights_in_range(
12210        &self,
12211        search_range: Range<Anchor>,
12212        display_snapshot: &DisplaySnapshot,
12213        cx: &AppContext,
12214    ) -> Vec<(Range<DisplayPoint>, Hsla)> {
12215        let mut results = Vec::new();
12216        for (color_fetcher, ranges) in self.gutter_highlights.values() {
12217            let color = color_fetcher(cx);
12218            let start_ix = match ranges.binary_search_by(|probe| {
12219                let cmp = probe
12220                    .end
12221                    .cmp(&search_range.start, &display_snapshot.buffer_snapshot);
12222                if cmp.is_gt() {
12223                    Ordering::Greater
12224                } else {
12225                    Ordering::Less
12226                }
12227            }) {
12228                Ok(i) | Err(i) => i,
12229            };
12230            for range in &ranges[start_ix..] {
12231                if range
12232                    .start
12233                    .cmp(&search_range.end, &display_snapshot.buffer_snapshot)
12234                    .is_ge()
12235                {
12236                    break;
12237                }
12238
12239                let start = range.start.to_display_point(display_snapshot);
12240                let end = range.end.to_display_point(display_snapshot);
12241                results.push((start..end, color))
12242            }
12243        }
12244        results
12245    }
12246
12247    /// Get the text ranges corresponding to the redaction query
12248    pub fn redacted_ranges(
12249        &self,
12250        search_range: Range<Anchor>,
12251        display_snapshot: &DisplaySnapshot,
12252        cx: &WindowContext,
12253    ) -> Vec<Range<DisplayPoint>> {
12254        display_snapshot
12255            .buffer_snapshot
12256            .redacted_ranges(search_range, |file| {
12257                if let Some(file) = file {
12258                    file.is_private()
12259                        && EditorSettings::get(
12260                            Some(SettingsLocation {
12261                                worktree_id: file.worktree_id(cx),
12262                                path: file.path().as_ref(),
12263                            }),
12264                            cx,
12265                        )
12266                        .redact_private_values
12267                } else {
12268                    false
12269                }
12270            })
12271            .map(|range| {
12272                range.start.to_display_point(display_snapshot)
12273                    ..range.end.to_display_point(display_snapshot)
12274            })
12275            .collect()
12276    }
12277
12278    pub fn highlight_text<T: 'static>(
12279        &mut self,
12280        ranges: Vec<Range<Anchor>>,
12281        style: HighlightStyle,
12282        cx: &mut ViewContext<Self>,
12283    ) {
12284        self.display_map.update(cx, |map, _| {
12285            map.highlight_text(TypeId::of::<T>(), ranges, style)
12286        });
12287        cx.notify();
12288    }
12289
12290    pub(crate) fn highlight_inlays<T: 'static>(
12291        &mut self,
12292        highlights: Vec<InlayHighlight>,
12293        style: HighlightStyle,
12294        cx: &mut ViewContext<Self>,
12295    ) {
12296        self.display_map.update(cx, |map, _| {
12297            map.highlight_inlays(TypeId::of::<T>(), highlights, style)
12298        });
12299        cx.notify();
12300    }
12301
12302    pub fn text_highlights<'a, T: 'static>(
12303        &'a self,
12304        cx: &'a AppContext,
12305    ) -> Option<(HighlightStyle, &'a [Range<Anchor>])> {
12306        self.display_map.read(cx).text_highlights(TypeId::of::<T>())
12307    }
12308
12309    pub fn clear_highlights<T: 'static>(&mut self, cx: &mut ViewContext<Self>) {
12310        let cleared = self
12311            .display_map
12312            .update(cx, |map, _| map.clear_highlights(TypeId::of::<T>()));
12313        if cleared {
12314            cx.notify();
12315        }
12316    }
12317
12318    pub fn show_local_cursors(&self, cx: &WindowContext) -> bool {
12319        (self.read_only(cx) || self.blink_manager.read(cx).visible())
12320            && self.focus_handle.is_focused(cx)
12321    }
12322
12323    pub fn set_show_cursor_when_unfocused(&mut self, is_enabled: bool, cx: &mut ViewContext<Self>) {
12324        self.show_cursor_when_unfocused = is_enabled;
12325        cx.notify();
12326    }
12327
12328    pub fn lsp_store(&self, cx: &AppContext) -> Option<Model<LspStore>> {
12329        self.project
12330            .as_ref()
12331            .map(|project| project.read(cx).lsp_store())
12332    }
12333
12334    fn on_buffer_changed(&mut self, _: Model<MultiBuffer>, cx: &mut ViewContext<Self>) {
12335        cx.notify();
12336    }
12337
12338    fn on_buffer_event(
12339        &mut self,
12340        multibuffer: Model<MultiBuffer>,
12341        event: &multi_buffer::Event,
12342        cx: &mut ViewContext<Self>,
12343    ) {
12344        match event {
12345            multi_buffer::Event::Edited {
12346                singleton_buffer_edited,
12347                edited_buffer: buffer_edited,
12348            } => {
12349                self.scrollbar_marker_state.dirty = true;
12350                self.active_indent_guides_state.dirty = true;
12351                self.refresh_active_diagnostics(cx);
12352                self.refresh_code_actions(cx);
12353                if self.has_active_inline_completion() {
12354                    self.update_visible_inline_completion(cx);
12355                }
12356                if let Some(buffer) = buffer_edited {
12357                    let buffer_id = buffer.read(cx).remote_id();
12358                    if !self.registered_buffers.contains_key(&buffer_id) {
12359                        if let Some(lsp_store) = self.lsp_store(cx) {
12360                            lsp_store.update(cx, |lsp_store, cx| {
12361                                self.registered_buffers.insert(
12362                                    buffer_id,
12363                                    lsp_store.register_buffer_with_language_servers(&buffer, cx),
12364                                );
12365                            })
12366                        }
12367                    }
12368                }
12369                cx.emit(EditorEvent::BufferEdited);
12370                cx.emit(SearchEvent::MatchesInvalidated);
12371                if *singleton_buffer_edited {
12372                    if let Some(project) = &self.project {
12373                        let project = project.read(cx);
12374                        #[allow(clippy::mutable_key_type)]
12375                        let languages_affected = multibuffer
12376                            .read(cx)
12377                            .all_buffers()
12378                            .into_iter()
12379                            .filter_map(|buffer| {
12380                                let buffer = buffer.read(cx);
12381                                let language = buffer.language()?;
12382                                if project.is_local()
12383                                    && project
12384                                        .language_servers_for_local_buffer(buffer, cx)
12385                                        .count()
12386                                        == 0
12387                                {
12388                                    None
12389                                } else {
12390                                    Some(language)
12391                                }
12392                            })
12393                            .cloned()
12394                            .collect::<HashSet<_>>();
12395                        if !languages_affected.is_empty() {
12396                            self.refresh_inlay_hints(
12397                                InlayHintRefreshReason::BufferEdited(languages_affected),
12398                                cx,
12399                            );
12400                        }
12401                    }
12402                }
12403
12404                let Some(project) = &self.project else { return };
12405                let (telemetry, is_via_ssh) = {
12406                    let project = project.read(cx);
12407                    let telemetry = project.client().telemetry().clone();
12408                    let is_via_ssh = project.is_via_ssh();
12409                    (telemetry, is_via_ssh)
12410                };
12411                refresh_linked_ranges(self, cx);
12412                telemetry.log_edit_event("editor", is_via_ssh);
12413            }
12414            multi_buffer::Event::ExcerptsAdded {
12415                buffer,
12416                predecessor,
12417                excerpts,
12418            } => {
12419                self.tasks_update_task = Some(self.refresh_runnables(cx));
12420                let buffer_id = buffer.read(cx).remote_id();
12421                if !self.diff_map.diff_bases.contains_key(&buffer_id) {
12422                    if let Some(project) = &self.project {
12423                        get_unstaged_changes_for_buffers(project, [buffer.clone()], cx);
12424                    }
12425                }
12426                cx.emit(EditorEvent::ExcerptsAdded {
12427                    buffer: buffer.clone(),
12428                    predecessor: *predecessor,
12429                    excerpts: excerpts.clone(),
12430                });
12431                self.refresh_inlay_hints(InlayHintRefreshReason::NewLinesShown, cx);
12432            }
12433            multi_buffer::Event::ExcerptsRemoved { ids } => {
12434                self.refresh_inlay_hints(InlayHintRefreshReason::ExcerptsRemoved(ids.clone()), cx);
12435                let buffer = self.buffer.read(cx);
12436                self.registered_buffers
12437                    .retain(|buffer_id, _| buffer.buffer(*buffer_id).is_some());
12438                cx.emit(EditorEvent::ExcerptsRemoved { ids: ids.clone() })
12439            }
12440            multi_buffer::Event::ExcerptsEdited { ids } => {
12441                cx.emit(EditorEvent::ExcerptsEdited { ids: ids.clone() })
12442            }
12443            multi_buffer::Event::ExcerptsExpanded { ids } => {
12444                self.refresh_inlay_hints(InlayHintRefreshReason::NewLinesShown, cx);
12445                cx.emit(EditorEvent::ExcerptsExpanded { ids: ids.clone() })
12446            }
12447            multi_buffer::Event::Reparsed(buffer_id) => {
12448                self.tasks_update_task = Some(self.refresh_runnables(cx));
12449
12450                cx.emit(EditorEvent::Reparsed(*buffer_id));
12451            }
12452            multi_buffer::Event::LanguageChanged(buffer_id) => {
12453                linked_editing_ranges::refresh_linked_ranges(self, cx);
12454                cx.emit(EditorEvent::Reparsed(*buffer_id));
12455                cx.notify();
12456            }
12457            multi_buffer::Event::DirtyChanged => cx.emit(EditorEvent::DirtyChanged),
12458            multi_buffer::Event::Saved => cx.emit(EditorEvent::Saved),
12459            multi_buffer::Event::FileHandleChanged | multi_buffer::Event::Reloaded => {
12460                cx.emit(EditorEvent::TitleChanged)
12461            }
12462            // multi_buffer::Event::DiffBaseChanged => {
12463            //     self.scrollbar_marker_state.dirty = true;
12464            //     cx.emit(EditorEvent::DiffBaseChanged);
12465            //     cx.notify();
12466            // }
12467            multi_buffer::Event::Closed => cx.emit(EditorEvent::Closed),
12468            multi_buffer::Event::DiagnosticsUpdated => {
12469                self.refresh_active_diagnostics(cx);
12470                self.scrollbar_marker_state.dirty = true;
12471                cx.notify();
12472            }
12473            _ => {}
12474        };
12475    }
12476
12477    fn on_display_map_changed(&mut self, _: Model<DisplayMap>, cx: &mut ViewContext<Self>) {
12478        cx.notify();
12479    }
12480
12481    fn settings_changed(&mut self, cx: &mut ViewContext<Self>) {
12482        self.tasks_update_task = Some(self.refresh_runnables(cx));
12483        self.refresh_inline_completion(true, false, cx);
12484        self.refresh_inlay_hints(
12485            InlayHintRefreshReason::SettingsChange(inlay_hint_settings(
12486                self.selections.newest_anchor().head(),
12487                &self.buffer.read(cx).snapshot(cx),
12488                cx,
12489            )),
12490            cx,
12491        );
12492
12493        let old_cursor_shape = self.cursor_shape;
12494
12495        {
12496            let editor_settings = EditorSettings::get_global(cx);
12497            self.scroll_manager.vertical_scroll_margin = editor_settings.vertical_scroll_margin;
12498            self.show_breadcrumbs = editor_settings.toolbar.breadcrumbs;
12499            self.cursor_shape = editor_settings.cursor_shape.unwrap_or_default();
12500        }
12501
12502        if old_cursor_shape != self.cursor_shape {
12503            cx.emit(EditorEvent::CursorShapeChanged);
12504        }
12505
12506        let project_settings = ProjectSettings::get_global(cx);
12507        self.serialize_dirty_buffers = project_settings.session.restore_unsaved_buffers;
12508
12509        if self.mode == EditorMode::Full {
12510            let inline_blame_enabled = project_settings.git.inline_blame_enabled();
12511            if self.git_blame_inline_enabled != inline_blame_enabled {
12512                self.toggle_git_blame_inline_internal(false, cx);
12513            }
12514        }
12515
12516        cx.notify();
12517    }
12518
12519    pub fn set_searchable(&mut self, searchable: bool) {
12520        self.searchable = searchable;
12521    }
12522
12523    pub fn searchable(&self) -> bool {
12524        self.searchable
12525    }
12526
12527    fn open_proposed_changes_editor(
12528        &mut self,
12529        _: &OpenProposedChangesEditor,
12530        cx: &mut ViewContext<Self>,
12531    ) {
12532        let Some(workspace) = self.workspace() else {
12533            cx.propagate();
12534            return;
12535        };
12536
12537        let selections = self.selections.all::<usize>(cx);
12538        let multi_buffer = self.buffer.read(cx);
12539        let multi_buffer_snapshot = multi_buffer.snapshot(cx);
12540        let mut new_selections_by_buffer = HashMap::default();
12541        for selection in selections {
12542            for (excerpt, range) in
12543                multi_buffer_snapshot.range_to_buffer_ranges(selection.start..selection.end)
12544            {
12545                let mut range = range.to_point(excerpt.buffer());
12546                range.start.column = 0;
12547                range.end.column = excerpt.buffer().line_len(range.end.row);
12548                new_selections_by_buffer
12549                    .entry(multi_buffer.buffer(excerpt.buffer_id()).unwrap())
12550                    .or_insert(Vec::new())
12551                    .push(range)
12552            }
12553        }
12554
12555        let proposed_changes_buffers = new_selections_by_buffer
12556            .into_iter()
12557            .map(|(buffer, ranges)| ProposedChangeLocation { buffer, ranges })
12558            .collect::<Vec<_>>();
12559        let proposed_changes_editor = cx.new_view(|cx| {
12560            ProposedChangesEditor::new(
12561                "Proposed changes",
12562                proposed_changes_buffers,
12563                self.project.clone(),
12564                cx,
12565            )
12566        });
12567
12568        cx.window_context().defer(move |cx| {
12569            workspace.update(cx, |workspace, cx| {
12570                workspace.active_pane().update(cx, |pane, cx| {
12571                    pane.add_item(Box::new(proposed_changes_editor), true, true, None, cx);
12572                });
12573            });
12574        });
12575    }
12576
12577    pub fn open_excerpts_in_split(&mut self, _: &OpenExcerptsSplit, cx: &mut ViewContext<Self>) {
12578        self.open_excerpts_common(None, true, cx)
12579    }
12580
12581    pub fn open_excerpts(&mut self, _: &OpenExcerpts, cx: &mut ViewContext<Self>) {
12582        self.open_excerpts_common(None, false, cx)
12583    }
12584
12585    fn open_excerpts_common(
12586        &mut self,
12587        jump_data: Option<JumpData>,
12588        split: bool,
12589        cx: &mut ViewContext<Self>,
12590    ) {
12591        let Some(workspace) = self.workspace() else {
12592            cx.propagate();
12593            return;
12594        };
12595
12596        if self.buffer.read(cx).is_singleton() {
12597            cx.propagate();
12598            return;
12599        }
12600
12601        let mut new_selections_by_buffer = HashMap::default();
12602        match &jump_data {
12603            Some(JumpData::MultiBufferPoint {
12604                excerpt_id,
12605                position,
12606                anchor,
12607                line_offset_from_top,
12608            }) => {
12609                let multi_buffer_snapshot = self.buffer.read(cx).snapshot(cx);
12610                if let Some(buffer) = multi_buffer_snapshot
12611                    .buffer_id_for_excerpt(*excerpt_id)
12612                    .and_then(|buffer_id| self.buffer.read(cx).buffer(buffer_id))
12613                {
12614                    let buffer_snapshot = buffer.read(cx).snapshot();
12615                    let jump_to_point = if buffer_snapshot.can_resolve(anchor) {
12616                        language::ToPoint::to_point(anchor, &buffer_snapshot)
12617                    } else {
12618                        buffer_snapshot.clip_point(*position, Bias::Left)
12619                    };
12620                    let jump_to_offset = buffer_snapshot.point_to_offset(jump_to_point);
12621                    new_selections_by_buffer.insert(
12622                        buffer,
12623                        (
12624                            vec![jump_to_offset..jump_to_offset],
12625                            Some(*line_offset_from_top),
12626                        ),
12627                    );
12628                }
12629            }
12630            Some(JumpData::MultiBufferRow {
12631                row,
12632                line_offset_from_top,
12633            }) => {
12634                let point = MultiBufferPoint::new(row.0, 0);
12635                if let Some((buffer, buffer_point, _)) =
12636                    self.buffer.read(cx).point_to_buffer_point(point, cx)
12637                {
12638                    let buffer_offset = buffer.read(cx).point_to_offset(buffer_point);
12639                    new_selections_by_buffer
12640                        .entry(buffer)
12641                        .or_insert((Vec::new(), Some(*line_offset_from_top)))
12642                        .0
12643                        .push(buffer_offset..buffer_offset)
12644                }
12645            }
12646            None => {
12647                let selections = self.selections.all::<usize>(cx);
12648                let multi_buffer = self.buffer.read(cx);
12649                for selection in selections {
12650                    for (excerpt, mut range) in multi_buffer
12651                        .snapshot(cx)
12652                        .range_to_buffer_ranges(selection.range())
12653                    {
12654                        // When editing branch buffers, jump to the corresponding location
12655                        // in their base buffer.
12656                        let mut buffer_handle = multi_buffer.buffer(excerpt.buffer_id()).unwrap();
12657                        let buffer = buffer_handle.read(cx);
12658                        if let Some(base_buffer) = buffer.base_buffer() {
12659                            range = buffer.range_to_version(range, &base_buffer.read(cx).version());
12660                            buffer_handle = base_buffer;
12661                        }
12662
12663                        if selection.reversed {
12664                            mem::swap(&mut range.start, &mut range.end);
12665                        }
12666                        new_selections_by_buffer
12667                            .entry(buffer_handle)
12668                            .or_insert((Vec::new(), None))
12669                            .0
12670                            .push(range)
12671                    }
12672                }
12673            }
12674        }
12675
12676        if new_selections_by_buffer.is_empty() {
12677            return;
12678        }
12679
12680        // We defer the pane interaction because we ourselves are a workspace item
12681        // and activating a new item causes the pane to call a method on us reentrantly,
12682        // which panics if we're on the stack.
12683        cx.window_context().defer(move |cx| {
12684            workspace.update(cx, |workspace, cx| {
12685                let pane = if split {
12686                    workspace.adjacent_pane(cx)
12687                } else {
12688                    workspace.active_pane().clone()
12689                };
12690
12691                for (buffer, (ranges, scroll_offset)) in new_selections_by_buffer {
12692                    let editor = buffer
12693                        .read(cx)
12694                        .file()
12695                        .is_none()
12696                        .then(|| {
12697                            // Handle file-less buffers separately: those are not really the project items, so won't have a project path or entity id,
12698                            // so `workspace.open_project_item` will never find them, always opening a new editor.
12699                            // Instead, we try to activate the existing editor in the pane first.
12700                            let (editor, pane_item_index) =
12701                                pane.read(cx).items().enumerate().find_map(|(i, item)| {
12702                                    let editor = item.downcast::<Editor>()?;
12703                                    let singleton_buffer =
12704                                        editor.read(cx).buffer().read(cx).as_singleton()?;
12705                                    if singleton_buffer == buffer {
12706                                        Some((editor, i))
12707                                    } else {
12708                                        None
12709                                    }
12710                                })?;
12711                            pane.update(cx, |pane, cx| {
12712                                pane.activate_item(pane_item_index, true, true, cx)
12713                            });
12714                            Some(editor)
12715                        })
12716                        .flatten()
12717                        .unwrap_or_else(|| {
12718                            workspace.open_project_item::<Self>(
12719                                pane.clone(),
12720                                buffer,
12721                                true,
12722                                true,
12723                                cx,
12724                            )
12725                        });
12726
12727                    editor.update(cx, |editor, cx| {
12728                        let autoscroll = match scroll_offset {
12729                            Some(scroll_offset) => Autoscroll::top_relative(scroll_offset as usize),
12730                            None => Autoscroll::newest(),
12731                        };
12732                        let nav_history = editor.nav_history.take();
12733                        editor.change_selections(Some(autoscroll), cx, |s| {
12734                            s.select_ranges(ranges);
12735                        });
12736                        editor.nav_history = nav_history;
12737                    });
12738                }
12739            })
12740        });
12741    }
12742
12743    fn marked_text_ranges(&self, cx: &AppContext) -> Option<Vec<Range<OffsetUtf16>>> {
12744        let snapshot = self.buffer.read(cx).read(cx);
12745        let (_, ranges) = self.text_highlights::<InputComposition>(cx)?;
12746        Some(
12747            ranges
12748                .iter()
12749                .map(move |range| {
12750                    range.start.to_offset_utf16(&snapshot)..range.end.to_offset_utf16(&snapshot)
12751                })
12752                .collect(),
12753        )
12754    }
12755
12756    fn selection_replacement_ranges(
12757        &self,
12758        range: Range<OffsetUtf16>,
12759        cx: &mut AppContext,
12760    ) -> Vec<Range<OffsetUtf16>> {
12761        let selections = self.selections.all::<OffsetUtf16>(cx);
12762        let newest_selection = selections
12763            .iter()
12764            .max_by_key(|selection| selection.id)
12765            .unwrap();
12766        let start_delta = range.start.0 as isize - newest_selection.start.0 as isize;
12767        let end_delta = range.end.0 as isize - newest_selection.end.0 as isize;
12768        let snapshot = self.buffer.read(cx).read(cx);
12769        selections
12770            .into_iter()
12771            .map(|mut selection| {
12772                selection.start.0 =
12773                    (selection.start.0 as isize).saturating_add(start_delta) as usize;
12774                selection.end.0 = (selection.end.0 as isize).saturating_add(end_delta) as usize;
12775                snapshot.clip_offset_utf16(selection.start, Bias::Left)
12776                    ..snapshot.clip_offset_utf16(selection.end, Bias::Right)
12777            })
12778            .collect()
12779    }
12780
12781    fn report_editor_event(
12782        &self,
12783        event_type: &'static str,
12784        file_extension: Option<String>,
12785        cx: &AppContext,
12786    ) {
12787        if cfg!(any(test, feature = "test-support")) {
12788            return;
12789        }
12790
12791        let Some(project) = &self.project else { return };
12792
12793        // If None, we are in a file without an extension
12794        let file = self
12795            .buffer
12796            .read(cx)
12797            .as_singleton()
12798            .and_then(|b| b.read(cx).file());
12799        let file_extension = file_extension.or(file
12800            .as_ref()
12801            .and_then(|file| Path::new(file.file_name(cx)).extension())
12802            .and_then(|e| e.to_str())
12803            .map(|a| a.to_string()));
12804
12805        let vim_mode = cx
12806            .global::<SettingsStore>()
12807            .raw_user_settings()
12808            .get("vim_mode")
12809            == Some(&serde_json::Value::Bool(true));
12810
12811        let copilot_enabled = all_language_settings(file, cx).inline_completions.provider
12812            == language::language_settings::InlineCompletionProvider::Copilot;
12813        let copilot_enabled_for_language = self
12814            .buffer
12815            .read(cx)
12816            .settings_at(0, cx)
12817            .show_inline_completions;
12818
12819        let project = project.read(cx);
12820        telemetry::event!(
12821            event_type,
12822            file_extension,
12823            vim_mode,
12824            copilot_enabled,
12825            copilot_enabled_for_language,
12826            is_via_ssh = project.is_via_ssh(),
12827        );
12828    }
12829
12830    /// Copy the highlighted chunks to the clipboard as JSON. The format is an array of lines,
12831    /// with each line being an array of {text, highlight} objects.
12832    fn copy_highlight_json(&mut self, _: &CopyHighlightJson, cx: &mut ViewContext<Self>) {
12833        let Some(buffer) = self.buffer.read(cx).as_singleton() else {
12834            return;
12835        };
12836
12837        #[derive(Serialize)]
12838        struct Chunk<'a> {
12839            text: String,
12840            highlight: Option<&'a str>,
12841        }
12842
12843        let snapshot = buffer.read(cx).snapshot();
12844        let range = self
12845            .selected_text_range(false, cx)
12846            .and_then(|selection| {
12847                if selection.range.is_empty() {
12848                    None
12849                } else {
12850                    Some(selection.range)
12851                }
12852            })
12853            .unwrap_or_else(|| 0..snapshot.len());
12854
12855        let chunks = snapshot.chunks(range, true);
12856        let mut lines = Vec::new();
12857        let mut line: VecDeque<Chunk> = VecDeque::new();
12858
12859        let Some(style) = self.style.as_ref() else {
12860            return;
12861        };
12862
12863        for chunk in chunks {
12864            let highlight = chunk
12865                .syntax_highlight_id
12866                .and_then(|id| id.name(&style.syntax));
12867            let mut chunk_lines = chunk.text.split('\n').peekable();
12868            while let Some(text) = chunk_lines.next() {
12869                let mut merged_with_last_token = false;
12870                if let Some(last_token) = line.back_mut() {
12871                    if last_token.highlight == highlight {
12872                        last_token.text.push_str(text);
12873                        merged_with_last_token = true;
12874                    }
12875                }
12876
12877                if !merged_with_last_token {
12878                    line.push_back(Chunk {
12879                        text: text.into(),
12880                        highlight,
12881                    });
12882                }
12883
12884                if chunk_lines.peek().is_some() {
12885                    if line.len() > 1 && line.front().unwrap().text.is_empty() {
12886                        line.pop_front();
12887                    }
12888                    if line.len() > 1 && line.back().unwrap().text.is_empty() {
12889                        line.pop_back();
12890                    }
12891
12892                    lines.push(mem::take(&mut line));
12893                }
12894            }
12895        }
12896
12897        let Some(lines) = serde_json::to_string_pretty(&lines).log_err() else {
12898            return;
12899        };
12900        cx.write_to_clipboard(ClipboardItem::new_string(lines));
12901    }
12902
12903    pub fn open_context_menu(&mut self, _: &OpenContextMenu, cx: &mut ViewContext<Self>) {
12904        self.request_autoscroll(Autoscroll::newest(), cx);
12905        let position = self.selections.newest_display(cx).start;
12906        mouse_context_menu::deploy_context_menu(self, None, position, cx);
12907    }
12908
12909    pub fn inlay_hint_cache(&self) -> &InlayHintCache {
12910        &self.inlay_hint_cache
12911    }
12912
12913    pub fn replay_insert_event(
12914        &mut self,
12915        text: &str,
12916        relative_utf16_range: Option<Range<isize>>,
12917        cx: &mut ViewContext<Self>,
12918    ) {
12919        if !self.input_enabled {
12920            cx.emit(EditorEvent::InputIgnored { text: text.into() });
12921            return;
12922        }
12923        if let Some(relative_utf16_range) = relative_utf16_range {
12924            let selections = self.selections.all::<OffsetUtf16>(cx);
12925            self.change_selections(None, cx, |s| {
12926                let new_ranges = selections.into_iter().map(|range| {
12927                    let start = OffsetUtf16(
12928                        range
12929                            .head()
12930                            .0
12931                            .saturating_add_signed(relative_utf16_range.start),
12932                    );
12933                    let end = OffsetUtf16(
12934                        range
12935                            .head()
12936                            .0
12937                            .saturating_add_signed(relative_utf16_range.end),
12938                    );
12939                    start..end
12940                });
12941                s.select_ranges(new_ranges);
12942            });
12943        }
12944
12945        self.handle_input(text, cx);
12946    }
12947
12948    pub fn supports_inlay_hints(&self, cx: &AppContext) -> bool {
12949        let Some(provider) = self.semantics_provider.as_ref() else {
12950            return false;
12951        };
12952
12953        let mut supports = false;
12954        self.buffer().read(cx).for_each_buffer(|buffer| {
12955            supports |= provider.supports_inlay_hints(buffer, cx);
12956        });
12957        supports
12958    }
12959
12960    pub fn focus(&self, cx: &mut WindowContext) {
12961        cx.focus(&self.focus_handle)
12962    }
12963
12964    pub fn is_focused(&self, cx: &WindowContext) -> bool {
12965        self.focus_handle.is_focused(cx)
12966    }
12967
12968    fn handle_focus(&mut self, cx: &mut ViewContext<Self>) {
12969        cx.emit(EditorEvent::Focused);
12970
12971        if let Some(descendant) = self
12972            .last_focused_descendant
12973            .take()
12974            .and_then(|descendant| descendant.upgrade())
12975        {
12976            cx.focus(&descendant);
12977        } else {
12978            if let Some(blame) = self.blame.as_ref() {
12979                blame.update(cx, GitBlame::focus)
12980            }
12981
12982            self.blink_manager.update(cx, BlinkManager::enable);
12983            self.show_cursor_names(cx);
12984            self.buffer.update(cx, |buffer, cx| {
12985                buffer.finalize_last_transaction(cx);
12986                if self.leader_peer_id.is_none() {
12987                    buffer.set_active_selections(
12988                        &self.selections.disjoint_anchors(),
12989                        self.selections.line_mode,
12990                        self.cursor_shape,
12991                        cx,
12992                    );
12993                }
12994            });
12995        }
12996    }
12997
12998    fn handle_focus_in(&mut self, cx: &mut ViewContext<Self>) {
12999        cx.emit(EditorEvent::FocusedIn)
13000    }
13001
13002    fn handle_focus_out(&mut self, event: FocusOutEvent, _cx: &mut ViewContext<Self>) {
13003        if event.blurred != self.focus_handle {
13004            self.last_focused_descendant = Some(event.blurred);
13005        }
13006    }
13007
13008    pub fn handle_blur(&mut self, cx: &mut ViewContext<Self>) {
13009        self.blink_manager.update(cx, BlinkManager::disable);
13010        self.buffer
13011            .update(cx, |buffer, cx| buffer.remove_active_selections(cx));
13012
13013        if let Some(blame) = self.blame.as_ref() {
13014            blame.update(cx, GitBlame::blur)
13015        }
13016        if !self.hover_state.focused(cx) {
13017            hide_hover(self, cx);
13018        }
13019
13020        self.hide_context_menu(cx);
13021        cx.emit(EditorEvent::Blurred);
13022        cx.notify();
13023    }
13024
13025    pub fn register_action<A: Action>(
13026        &mut self,
13027        listener: impl Fn(&A, &mut WindowContext) + 'static,
13028    ) -> Subscription {
13029        let id = self.next_editor_action_id.post_inc();
13030        let listener = Arc::new(listener);
13031        self.editor_actions.borrow_mut().insert(
13032            id,
13033            Box::new(move |cx| {
13034                let cx = cx.window_context();
13035                let listener = listener.clone();
13036                cx.on_action(TypeId::of::<A>(), move |action, phase, cx| {
13037                    let action = action.downcast_ref().unwrap();
13038                    if phase == DispatchPhase::Bubble {
13039                        listener(action, cx)
13040                    }
13041                })
13042            }),
13043        );
13044
13045        let editor_actions = self.editor_actions.clone();
13046        Subscription::new(move || {
13047            editor_actions.borrow_mut().remove(&id);
13048        })
13049    }
13050
13051    pub fn file_header_size(&self) -> u32 {
13052        FILE_HEADER_HEIGHT
13053    }
13054
13055    pub fn revert(
13056        &mut self,
13057        revert_changes: HashMap<BufferId, Vec<(Range<text::Anchor>, Rope)>>,
13058        cx: &mut ViewContext<Self>,
13059    ) {
13060        self.buffer().update(cx, |multi_buffer, cx| {
13061            for (buffer_id, changes) in revert_changes {
13062                if let Some(buffer) = multi_buffer.buffer(buffer_id) {
13063                    buffer.update(cx, |buffer, cx| {
13064                        buffer.edit(
13065                            changes.into_iter().map(|(range, text)| {
13066                                (range, text.to_string().map(Arc::<str>::from))
13067                            }),
13068                            None,
13069                            cx,
13070                        );
13071                    });
13072                }
13073            }
13074        });
13075        self.change_selections(None, cx, |selections| selections.refresh());
13076    }
13077
13078    pub fn to_pixel_point(
13079        &mut self,
13080        source: multi_buffer::Anchor,
13081        editor_snapshot: &EditorSnapshot,
13082        cx: &mut ViewContext<Self>,
13083    ) -> Option<gpui::Point<Pixels>> {
13084        let source_point = source.to_display_point(editor_snapshot);
13085        self.display_to_pixel_point(source_point, editor_snapshot, cx)
13086    }
13087
13088    pub fn display_to_pixel_point(
13089        &self,
13090        source: DisplayPoint,
13091        editor_snapshot: &EditorSnapshot,
13092        cx: &WindowContext,
13093    ) -> Option<gpui::Point<Pixels>> {
13094        let line_height = self.style()?.text.line_height_in_pixels(cx.rem_size());
13095        let text_layout_details = self.text_layout_details(cx);
13096        let scroll_top = text_layout_details
13097            .scroll_anchor
13098            .scroll_position(editor_snapshot)
13099            .y;
13100
13101        if source.row().as_f32() < scroll_top.floor() {
13102            return None;
13103        }
13104        let source_x = editor_snapshot.x_for_display_point(source, &text_layout_details);
13105        let source_y = line_height * (source.row().as_f32() - scroll_top);
13106        Some(gpui::Point::new(source_x, source_y))
13107    }
13108
13109    pub fn has_active_completions_menu(&self) -> bool {
13110        self.context_menu.borrow().as_ref().map_or(false, |menu| {
13111            menu.visible() && matches!(menu, CodeContextMenu::Completions(_))
13112        })
13113    }
13114
13115    pub fn register_addon<T: Addon>(&mut self, instance: T) {
13116        self.addons
13117            .insert(std::any::TypeId::of::<T>(), Box::new(instance));
13118    }
13119
13120    pub fn unregister_addon<T: Addon>(&mut self) {
13121        self.addons.remove(&std::any::TypeId::of::<T>());
13122    }
13123
13124    pub fn addon<T: Addon>(&self) -> Option<&T> {
13125        let type_id = std::any::TypeId::of::<T>();
13126        self.addons
13127            .get(&type_id)
13128            .and_then(|item| item.to_any().downcast_ref::<T>())
13129    }
13130
13131    pub fn add_change_set(
13132        &mut self,
13133        change_set: Model<BufferChangeSet>,
13134        cx: &mut ViewContext<Self>,
13135    ) {
13136        self.diff_map.add_change_set(change_set, cx);
13137    }
13138
13139    fn character_size(&self, cx: &mut ViewContext<Self>) -> gpui::Point<Pixels> {
13140        let text_layout_details = self.text_layout_details(cx);
13141        let style = &text_layout_details.editor_style;
13142        let font_id = cx.text_system().resolve_font(&style.text.font());
13143        let font_size = style.text.font_size.to_pixels(cx.rem_size());
13144        let line_height = style.text.line_height_in_pixels(cx.rem_size());
13145
13146        let em_width = cx
13147            .text_system()
13148            .typographic_bounds(font_id, font_size, 'm')
13149            .unwrap()
13150            .size
13151            .width;
13152
13153        gpui::Point::new(em_width, line_height)
13154    }
13155}
13156
13157fn get_unstaged_changes_for_buffers(
13158    project: &Model<Project>,
13159    buffers: impl IntoIterator<Item = Model<Buffer>>,
13160    cx: &mut ViewContext<Editor>,
13161) {
13162    let mut tasks = Vec::new();
13163    project.update(cx, |project, cx| {
13164        for buffer in buffers {
13165            tasks.push(project.open_unstaged_changes(buffer.clone(), cx))
13166        }
13167    });
13168    cx.spawn(|this, mut cx| async move {
13169        let change_sets = futures::future::join_all(tasks).await;
13170        this.update(&mut cx, |this, cx| {
13171            for change_set in change_sets {
13172                if let Some(change_set) = change_set.log_err() {
13173                    this.diff_map.add_change_set(change_set, cx);
13174                }
13175            }
13176        })
13177        .ok();
13178    })
13179    .detach();
13180}
13181
13182fn char_len_with_expanded_tabs(offset: usize, text: &str, tab_size: NonZeroU32) -> usize {
13183    let tab_size = tab_size.get() as usize;
13184    let mut width = offset;
13185
13186    for ch in text.chars() {
13187        width += if ch == '\t' {
13188            tab_size - (width % tab_size)
13189        } else {
13190            1
13191        };
13192    }
13193
13194    width - offset
13195}
13196
13197#[cfg(test)]
13198mod tests {
13199    use super::*;
13200
13201    #[test]
13202    fn test_string_size_with_expanded_tabs() {
13203        let nz = |val| NonZeroU32::new(val).unwrap();
13204        assert_eq!(char_len_with_expanded_tabs(0, "", nz(4)), 0);
13205        assert_eq!(char_len_with_expanded_tabs(0, "hello", nz(4)), 5);
13206        assert_eq!(char_len_with_expanded_tabs(0, "\thello", nz(4)), 9);
13207        assert_eq!(char_len_with_expanded_tabs(0, "abc\tab", nz(4)), 6);
13208        assert_eq!(char_len_with_expanded_tabs(0, "hello\t", nz(4)), 8);
13209        assert_eq!(char_len_with_expanded_tabs(0, "\t\t", nz(8)), 16);
13210        assert_eq!(char_len_with_expanded_tabs(0, "x\t", nz(8)), 8);
13211        assert_eq!(char_len_with_expanded_tabs(7, "x\t", nz(8)), 9);
13212    }
13213}
13214
13215/// Tokenizes a string into runs of text that should stick together, or that is whitespace.
13216struct WordBreakingTokenizer<'a> {
13217    input: &'a str,
13218}
13219
13220impl<'a> WordBreakingTokenizer<'a> {
13221    fn new(input: &'a str) -> Self {
13222        Self { input }
13223    }
13224}
13225
13226fn is_char_ideographic(ch: char) -> bool {
13227    use unicode_script::Script::*;
13228    use unicode_script::UnicodeScript;
13229    matches!(ch.script(), Han | Tangut | Yi)
13230}
13231
13232fn is_grapheme_ideographic(text: &str) -> bool {
13233    text.chars().any(is_char_ideographic)
13234}
13235
13236fn is_grapheme_whitespace(text: &str) -> bool {
13237    text.chars().any(|x| x.is_whitespace())
13238}
13239
13240fn should_stay_with_preceding_ideograph(text: &str) -> bool {
13241    text.chars().next().map_or(false, |ch| {
13242        matches!(ch, '。' | '、' | '，' | '？' | '！' | '：' | '；' | '…')
13243    })
13244}
13245
13246#[derive(PartialEq, Eq, Debug, Clone, Copy)]
13247struct WordBreakToken<'a> {
13248    token: &'a str,
13249    grapheme_len: usize,
13250    is_whitespace: bool,
13251}
13252
13253impl<'a> Iterator for WordBreakingTokenizer<'a> {
13254    /// Yields a span, the count of graphemes in the token, and whether it was
13255    /// whitespace. Note that it also breaks at word boundaries.
13256    type Item = WordBreakToken<'a>;
13257
13258    fn next(&mut self) -> Option<Self::Item> {
13259        use unicode_segmentation::UnicodeSegmentation;
13260        if self.input.is_empty() {
13261            return None;
13262        }
13263
13264        let mut iter = self.input.graphemes(true).peekable();
13265        let mut offset = 0;
13266        let mut graphemes = 0;
13267        if let Some(first_grapheme) = iter.next() {
13268            let is_whitespace = is_grapheme_whitespace(first_grapheme);
13269            offset += first_grapheme.len();
13270            graphemes += 1;
13271            if is_grapheme_ideographic(first_grapheme) && !is_whitespace {
13272                if let Some(grapheme) = iter.peek().copied() {
13273                    if should_stay_with_preceding_ideograph(grapheme) {
13274                        offset += grapheme.len();
13275                        graphemes += 1;
13276                    }
13277                }
13278            } else {
13279                let mut words = self.input[offset..].split_word_bound_indices().peekable();
13280                let mut next_word_bound = words.peek().copied();
13281                if next_word_bound.map_or(false, |(i, _)| i == 0) {
13282                    next_word_bound = words.next();
13283                }
13284                while let Some(grapheme) = iter.peek().copied() {
13285                    if next_word_bound.map_or(false, |(i, _)| i == offset) {
13286                        break;
13287                    };
13288                    if is_grapheme_whitespace(grapheme) != is_whitespace {
13289                        break;
13290                    };
13291                    offset += grapheme.len();
13292                    graphemes += 1;
13293                    iter.next();
13294                }
13295            }
13296            let token = &self.input[..offset];
13297            self.input = &self.input[offset..];
13298            if is_whitespace {
13299                Some(WordBreakToken {
13300                    token: " ",
13301                    grapheme_len: 1,
13302                    is_whitespace: true,
13303                })
13304            } else {
13305                Some(WordBreakToken {
13306                    token,
13307                    grapheme_len: graphemes,
13308                    is_whitespace: false,
13309                })
13310            }
13311        } else {
13312            None
13313        }
13314    }
13315}
13316
13317#[test]
13318fn test_word_breaking_tokenizer() {
13319    let tests: &[(&str, &[(&str, usize, bool)])] = &[
13320        ("", &[]),
13321        ("  ", &[(" ", 1, true)]),
13322        ("Ʒ", &[("Ʒ", 1, false)]),
13323        ("Ǽ", &[("Ǽ", 1, false)]),
13324        ("⋑", &[("⋑", 1, false)]),
13325        ("⋑⋑", &[("⋑⋑", 2, false)]),
13326        (
13327            "原理，进而",
13328            &[
13329                ("原", 1, false),
13330                ("理，", 2, false),
13331                ("进", 1, false),
13332                ("而", 1, false),
13333            ],
13334        ),
13335        (
13336            "hello world",
13337            &[("hello", 5, false), (" ", 1, true), ("world", 5, false)],
13338        ),
13339        (
13340            "hello, world",
13341            &[("hello,", 6, false), (" ", 1, true), ("world", 5, false)],
13342        ),
13343        (
13344            "  hello world",
13345            &[
13346                (" ", 1, true),
13347                ("hello", 5, false),
13348                (" ", 1, true),
13349                ("world", 5, false),
13350            ],
13351        ),
13352        (
13353            "这是什么 \n 钢笔",
13354            &[
13355                ("这", 1, false),
13356                ("是", 1, false),
13357                ("什", 1, false),
13358                ("么", 1, false),
13359                (" ", 1, true),
13360                ("钢", 1, false),
13361                ("笔", 1, false),
13362            ],
13363        ),
13364        (" mutton", &[(" ", 1, true), ("mutton", 6, false)]),
13365    ];
13366
13367    for (input, result) in tests {
13368        assert_eq!(
13369            WordBreakingTokenizer::new(input).collect::<Vec<_>>(),
13370            result
13371                .iter()
13372                .copied()
13373                .map(|(token, grapheme_len, is_whitespace)| WordBreakToken {
13374                    token,
13375                    grapheme_len,
13376                    is_whitespace,
13377                })
13378                .collect::<Vec<_>>()
13379        );
13380    }
13381}
13382
13383fn wrap_with_prefix(
13384    line_prefix: String,
13385    unwrapped_text: String,
13386    wrap_column: usize,
13387    tab_size: NonZeroU32,
13388) -> String {
13389    let line_prefix_len = char_len_with_expanded_tabs(0, &line_prefix, tab_size);
13390    let mut wrapped_text = String::new();
13391    let mut current_line = line_prefix.clone();
13392
13393    let tokenizer = WordBreakingTokenizer::new(&unwrapped_text);
13394    let mut current_line_len = line_prefix_len;
13395    for WordBreakToken {
13396        token,
13397        grapheme_len,
13398        is_whitespace,
13399    } in tokenizer
13400    {
13401        if current_line_len + grapheme_len > wrap_column && current_line_len != line_prefix_len {
13402            wrapped_text.push_str(current_line.trim_end());
13403            wrapped_text.push('\n');
13404            current_line.truncate(line_prefix.len());
13405            current_line_len = line_prefix_len;
13406            if !is_whitespace {
13407                current_line.push_str(token);
13408                current_line_len += grapheme_len;
13409            }
13410        } else if !is_whitespace {
13411            current_line.push_str(token);
13412            current_line_len += grapheme_len;
13413        } else if current_line_len != line_prefix_len {
13414            current_line.push(' ');
13415            current_line_len += 1;
13416        }
13417    }
13418
13419    if !current_line.is_empty() {
13420        wrapped_text.push_str(&current_line);
13421    }
13422    wrapped_text
13423}
13424
13425#[test]
13426fn test_wrap_with_prefix() {
13427    assert_eq!(
13428        wrap_with_prefix(
13429            "# ".to_string(),
13430            "abcdefg".to_string(),
13431            4,
13432            NonZeroU32::new(4).unwrap()
13433        ),
13434        "# abcdefg"
13435    );
13436    assert_eq!(
13437        wrap_with_prefix(
13438            "".to_string(),
13439            "\thello world".to_string(),
13440            8,
13441            NonZeroU32::new(4).unwrap()
13442        ),
13443        "hello\nworld"
13444    );
13445    assert_eq!(
13446        wrap_with_prefix(
13447            "// ".to_string(),
13448            "xx \nyy zz aa bb cc".to_string(),
13449            12,
13450            NonZeroU32::new(4).unwrap()
13451        ),
13452        "// xx yy zz\n// aa bb cc"
13453    );
13454    assert_eq!(
13455        wrap_with_prefix(
13456            String::new(),
13457            "这是什么 \n 钢笔".to_string(),
13458            3,
13459            NonZeroU32::new(4).unwrap()
13460        ),
13461        "这是什\n么 钢\n笔"
13462    );
13463}
13464
13465fn hunks_for_selections(
13466    snapshot: &EditorSnapshot,
13467    selections: &[Selection<Point>],
13468) -> Vec<MultiBufferDiffHunk> {
13469    hunks_for_ranges(
13470        selections.iter().map(|selection| selection.range()),
13471        snapshot,
13472    )
13473}
13474
13475pub fn hunks_for_ranges(
13476    ranges: impl Iterator<Item = Range<Point>>,
13477    snapshot: &EditorSnapshot,
13478) -> Vec<MultiBufferDiffHunk> {
13479    let mut hunks = Vec::new();
13480    let mut processed_buffer_rows: HashMap<BufferId, HashSet<Range<text::Anchor>>> =
13481        HashMap::default();
13482    for query_range in ranges {
13483        let query_rows =
13484            MultiBufferRow(query_range.start.row)..MultiBufferRow(query_range.end.row + 1);
13485        for hunk in snapshot.diff_map.diff_hunks_in_range(
13486            Point::new(query_rows.start.0, 0)..Point::new(query_rows.end.0, 0),
13487            &snapshot.buffer_snapshot,
13488        ) {
13489            // Deleted hunk is an empty row range, no caret can be placed there and Zed allows to revert it
13490            // when the caret is just above or just below the deleted hunk.
13491            let allow_adjacent = hunk_status(&hunk) == DiffHunkStatus::Removed;
13492            let related_to_selection = if allow_adjacent {
13493                hunk.row_range.overlaps(&query_rows)
13494                    || hunk.row_range.start == query_rows.end
13495                    || hunk.row_range.end == query_rows.start
13496            } else {
13497                hunk.row_range.overlaps(&query_rows)
13498            };
13499            if related_to_selection {
13500                if !processed_buffer_rows
13501                    .entry(hunk.buffer_id)
13502                    .or_default()
13503                    .insert(hunk.buffer_range.start..hunk.buffer_range.end)
13504                {
13505                    continue;
13506                }
13507                hunks.push(hunk);
13508            }
13509        }
13510    }
13511
13512    hunks
13513}
13514
13515pub trait CollaborationHub {
13516    fn collaborators<'a>(&self, cx: &'a AppContext) -> &'a HashMap<PeerId, Collaborator>;
13517    fn user_participant_indices<'a>(
13518        &self,
13519        cx: &'a AppContext,
13520    ) -> &'a HashMap<u64, ParticipantIndex>;
13521    fn user_names(&self, cx: &AppContext) -> HashMap<u64, SharedString>;
13522}
13523
13524impl CollaborationHub for Model<Project> {
13525    fn collaborators<'a>(&self, cx: &'a AppContext) -> &'a HashMap<PeerId, Collaborator> {
13526        self.read(cx).collaborators()
13527    }
13528
13529    fn user_participant_indices<'a>(
13530        &self,
13531        cx: &'a AppContext,
13532    ) -> &'a HashMap<u64, ParticipantIndex> {
13533        self.read(cx).user_store().read(cx).participant_indices()
13534    }
13535
13536    fn user_names(&self, cx: &AppContext) -> HashMap<u64, SharedString> {
13537        let this = self.read(cx);
13538        let user_ids = this.collaborators().values().map(|c| c.user_id);
13539        this.user_store().read_with(cx, |user_store, cx| {
13540            user_store.participant_names(user_ids, cx)
13541        })
13542    }
13543}
13544
13545pub trait SemanticsProvider {
13546    fn hover(
13547        &self,
13548        buffer: &Model<Buffer>,
13549        position: text::Anchor,
13550        cx: &mut AppContext,
13551    ) -> Option<Task<Vec<project::Hover>>>;
13552
13553    fn inlay_hints(
13554        &self,
13555        buffer_handle: Model<Buffer>,
13556        range: Range<text::Anchor>,
13557        cx: &mut AppContext,
13558    ) -> Option<Task<anyhow::Result<Vec<InlayHint>>>>;
13559
13560    fn resolve_inlay_hint(
13561        &self,
13562        hint: InlayHint,
13563        buffer_handle: Model<Buffer>,
13564        server_id: LanguageServerId,
13565        cx: &mut AppContext,
13566    ) -> Option<Task<anyhow::Result<InlayHint>>>;
13567
13568    fn supports_inlay_hints(&self, buffer: &Model<Buffer>, cx: &AppContext) -> bool;
13569
13570    fn document_highlights(
13571        &self,
13572        buffer: &Model<Buffer>,
13573        position: text::Anchor,
13574        cx: &mut AppContext,
13575    ) -> Option<Task<Result<Vec<DocumentHighlight>>>>;
13576
13577    fn definitions(
13578        &self,
13579        buffer: &Model<Buffer>,
13580        position: text::Anchor,
13581        kind: GotoDefinitionKind,
13582        cx: &mut AppContext,
13583    ) -> Option<Task<Result<Vec<LocationLink>>>>;
13584
13585    fn range_for_rename(
13586        &self,
13587        buffer: &Model<Buffer>,
13588        position: text::Anchor,
13589        cx: &mut AppContext,
13590    ) -> Option<Task<Result<Option<Range<text::Anchor>>>>>;
13591
13592    fn perform_rename(
13593        &self,
13594        buffer: &Model<Buffer>,
13595        position: text::Anchor,
13596        new_name: String,
13597        cx: &mut AppContext,
13598    ) -> Option<Task<Result<ProjectTransaction>>>;
13599}
13600
13601pub trait CompletionProvider {
13602    fn completions(
13603        &self,
13604        buffer: &Model<Buffer>,
13605        buffer_position: text::Anchor,
13606        trigger: CompletionContext,
13607        cx: &mut ViewContext<Editor>,
13608    ) -> Task<Result<Vec<Completion>>>;
13609
13610    fn resolve_completions(
13611        &self,
13612        buffer: Model<Buffer>,
13613        completion_indices: Vec<usize>,
13614        completions: Rc<RefCell<Box<[Completion]>>>,
13615        cx: &mut ViewContext<Editor>,
13616    ) -> Task<Result<bool>>;
13617
13618    fn apply_additional_edits_for_completion(
13619        &self,
13620        _buffer: Model<Buffer>,
13621        _completions: Rc<RefCell<Box<[Completion]>>>,
13622        _completion_index: usize,
13623        _push_to_history: bool,
13624        _cx: &mut ViewContext<Editor>,
13625    ) -> Task<Result<Option<language::Transaction>>> {
13626        Task::ready(Ok(None))
13627    }
13628
13629    fn is_completion_trigger(
13630        &self,
13631        buffer: &Model<Buffer>,
13632        position: language::Anchor,
13633        text: &str,
13634        trigger_in_words: bool,
13635        cx: &mut ViewContext<Editor>,
13636    ) -> bool;
13637
13638    fn sort_completions(&self) -> bool {
13639        true
13640    }
13641}
13642
13643pub trait CodeActionProvider {
13644    fn id(&self) -> Arc<str>;
13645
13646    fn code_actions(
13647        &self,
13648        buffer: &Model<Buffer>,
13649        range: Range<text::Anchor>,
13650        cx: &mut WindowContext,
13651    ) -> Task<Result<Vec<CodeAction>>>;
13652
13653    fn apply_code_action(
13654        &self,
13655        buffer_handle: Model<Buffer>,
13656        action: CodeAction,
13657        excerpt_id: ExcerptId,
13658        push_to_history: bool,
13659        cx: &mut WindowContext,
13660    ) -> Task<Result<ProjectTransaction>>;
13661}
13662
13663impl CodeActionProvider for Model<Project> {
13664    fn id(&self) -> Arc<str> {
13665        "project".into()
13666    }
13667
13668    fn code_actions(
13669        &self,
13670        buffer: &Model<Buffer>,
13671        range: Range<text::Anchor>,
13672        cx: &mut WindowContext,
13673    ) -> Task<Result<Vec<CodeAction>>> {
13674        self.update(cx, |project, cx| {
13675            project.code_actions(buffer, range, None, cx)
13676        })
13677    }
13678
13679    fn apply_code_action(
13680        &self,
13681        buffer_handle: Model<Buffer>,
13682        action: CodeAction,
13683        _excerpt_id: ExcerptId,
13684        push_to_history: bool,
13685        cx: &mut WindowContext,
13686    ) -> Task<Result<ProjectTransaction>> {
13687        self.update(cx, |project, cx| {
13688            project.apply_code_action(buffer_handle, action, push_to_history, cx)
13689        })
13690    }
13691}
13692
13693fn snippet_completions(
13694    project: &Project,
13695    buffer: &Model<Buffer>,
13696    buffer_position: text::Anchor,
13697    cx: &mut AppContext,
13698) -> Task<Result<Vec<Completion>>> {
13699    let language = buffer.read(cx).language_at(buffer_position);
13700    let language_name = language.as_ref().map(|language| language.lsp_id());
13701    let snippet_store = project.snippets().read(cx);
13702    let snippets = snippet_store.snippets_for(language_name, cx);
13703
13704    if snippets.is_empty() {
13705        return Task::ready(Ok(vec![]));
13706    }
13707    let snapshot = buffer.read(cx).text_snapshot();
13708    let chars: String = snapshot
13709        .reversed_chars_for_range(text::Anchor::MIN..buffer_position)
13710        .collect();
13711
13712    let scope = language.map(|language| language.default_scope());
13713    let executor = cx.background_executor().clone();
13714
13715    cx.background_executor().spawn(async move {
13716        let classifier = CharClassifier::new(scope).for_completion(true);
13717        let mut last_word = chars
13718            .chars()
13719            .take_while(|c| classifier.is_word(*c))
13720            .collect::<String>();
13721        last_word = last_word.chars().rev().collect();
13722
13723        if last_word.is_empty() {
13724            return Ok(vec![]);
13725        }
13726
13727        let as_offset = text::ToOffset::to_offset(&buffer_position, &snapshot);
13728        let to_lsp = |point: &text::Anchor| {
13729            let end = text::ToPointUtf16::to_point_utf16(point, &snapshot);
13730            point_to_lsp(end)
13731        };
13732        let lsp_end = to_lsp(&buffer_position);
13733
13734        let candidates = snippets
13735            .iter()
13736            .enumerate()
13737            .flat_map(|(ix, snippet)| {
13738                snippet
13739                    .prefix
13740                    .iter()
13741                    .map(move |prefix| StringMatchCandidate::new(ix, &prefix))
13742            })
13743            .collect::<Vec<StringMatchCandidate>>();
13744
13745        let mut matches = fuzzy::match_strings(
13746            &candidates,
13747            &last_word,
13748            last_word.chars().any(|c| c.is_uppercase()),
13749            100,
13750            &Default::default(),
13751            executor,
13752        )
13753        .await;
13754
13755        // Remove all candidates where the query's start does not match the start of any word in the candidate
13756        if let Some(query_start) = last_word.chars().next() {
13757            matches.retain(|string_match| {
13758                split_words(&string_match.string).any(|word| {
13759                    // Check that the first codepoint of the word as lowercase matches the first
13760                    // codepoint of the query as lowercase
13761                    word.chars()
13762                        .flat_map(|codepoint| codepoint.to_lowercase())
13763                        .zip(query_start.to_lowercase())
13764                        .all(|(word_cp, query_cp)| word_cp == query_cp)
13765                })
13766            });
13767        }
13768
13769        let matched_strings = matches
13770            .into_iter()
13771            .map(|m| m.string)
13772            .collect::<HashSet<_>>();
13773
13774        let result: Vec<Completion> = snippets
13775            .into_iter()
13776            .filter_map(|snippet| {
13777                let matching_prefix = snippet
13778                    .prefix
13779                    .iter()
13780                    .find(|prefix| matched_strings.contains(*prefix))?;
13781                let start = as_offset - last_word.len();
13782                let start = snapshot.anchor_before(start);
13783                let range = start..buffer_position;
13784                let lsp_start = to_lsp(&start);
13785                let lsp_range = lsp::Range {
13786                    start: lsp_start,
13787                    end: lsp_end,
13788                };
13789                Some(Completion {
13790                    old_range: range,
13791                    new_text: snippet.body.clone(),
13792                    resolved: false,
13793                    label: CodeLabel {
13794                        text: matching_prefix.clone(),
13795                        runs: vec![],
13796                        filter_range: 0..matching_prefix.len(),
13797                    },
13798                    server_id: LanguageServerId(usize::MAX),
13799                    documentation: snippet.description.clone().map(Documentation::SingleLine),
13800                    lsp_completion: lsp::CompletionItem {
13801                        label: snippet.prefix.first().unwrap().clone(),
13802                        kind: Some(CompletionItemKind::SNIPPET),
13803                        label_details: snippet.description.as_ref().map(|description| {
13804                            lsp::CompletionItemLabelDetails {
13805                                detail: Some(description.clone()),
13806                                description: None,
13807                            }
13808                        }),
13809                        insert_text_format: Some(InsertTextFormat::SNIPPET),
13810                        text_edit: Some(lsp::CompletionTextEdit::InsertAndReplace(
13811                            lsp::InsertReplaceEdit {
13812                                new_text: snippet.body.clone(),
13813                                insert: lsp_range,
13814                                replace: lsp_range,
13815                            },
13816                        )),
13817                        filter_text: Some(snippet.body.clone()),
13818                        sort_text: Some(char::MAX.to_string()),
13819                        ..Default::default()
13820                    },
13821                    confirm: None,
13822                })
13823            })
13824            .collect();
13825
13826        Ok(result)
13827    })
13828}
13829
13830impl CompletionProvider for Model<Project> {
13831    fn completions(
13832        &self,
13833        buffer: &Model<Buffer>,
13834        buffer_position: text::Anchor,
13835        options: CompletionContext,
13836        cx: &mut ViewContext<Editor>,
13837    ) -> Task<Result<Vec<Completion>>> {
13838        self.update(cx, |project, cx| {
13839            let snippets = snippet_completions(project, buffer, buffer_position, cx);
13840            let project_completions = project.completions(buffer, buffer_position, options, cx);
13841            cx.background_executor().spawn(async move {
13842                let mut completions = project_completions.await?;
13843                let snippets_completions = snippets.await?;
13844                completions.extend(snippets_completions);
13845                Ok(completions)
13846            })
13847        })
13848    }
13849
13850    fn resolve_completions(
13851        &self,
13852        buffer: Model<Buffer>,
13853        completion_indices: Vec<usize>,
13854        completions: Rc<RefCell<Box<[Completion]>>>,
13855        cx: &mut ViewContext<Editor>,
13856    ) -> Task<Result<bool>> {
13857        self.update(cx, |project, cx| {
13858            project.lsp_store().update(cx, |lsp_store, cx| {
13859                lsp_store.resolve_completions(buffer, completion_indices, completions, cx)
13860            })
13861        })
13862    }
13863
13864    fn apply_additional_edits_for_completion(
13865        &self,
13866        buffer: Model<Buffer>,
13867        completions: Rc<RefCell<Box<[Completion]>>>,
13868        completion_index: usize,
13869        push_to_history: bool,
13870        cx: &mut ViewContext<Editor>,
13871    ) -> Task<Result<Option<language::Transaction>>> {
13872        self.update(cx, |project, cx| {
13873            project.lsp_store().update(cx, |lsp_store, cx| {
13874                lsp_store.apply_additional_edits_for_completion(
13875                    buffer,
13876                    completions,
13877                    completion_index,
13878                    push_to_history,
13879                    cx,
13880                )
13881            })
13882        })
13883    }
13884
13885    fn is_completion_trigger(
13886        &self,
13887        buffer: &Model<Buffer>,
13888        position: language::Anchor,
13889        text: &str,
13890        trigger_in_words: bool,
13891        cx: &mut ViewContext<Editor>,
13892    ) -> bool {
13893        let mut chars = text.chars();
13894        let char = if let Some(char) = chars.next() {
13895            char
13896        } else {
13897            return false;
13898        };
13899        if chars.next().is_some() {
13900            return false;
13901        }
13902
13903        let buffer = buffer.read(cx);
13904        let snapshot = buffer.snapshot();
13905        if !snapshot.settings_at(position, cx).show_completions_on_input {
13906            return false;
13907        }
13908        let classifier = snapshot.char_classifier_at(position).for_completion(true);
13909        if trigger_in_words && classifier.is_word(char) {
13910            return true;
13911        }
13912
13913        buffer.completion_triggers().contains(text)
13914    }
13915}
13916
13917impl SemanticsProvider for Model<Project> {
13918    fn hover(
13919        &self,
13920        buffer: &Model<Buffer>,
13921        position: text::Anchor,
13922        cx: &mut AppContext,
13923    ) -> Option<Task<Vec<project::Hover>>> {
13924        Some(self.update(cx, |project, cx| project.hover(buffer, position, cx)))
13925    }
13926
13927    fn document_highlights(
13928        &self,
13929        buffer: &Model<Buffer>,
13930        position: text::Anchor,
13931        cx: &mut AppContext,
13932    ) -> Option<Task<Result<Vec<DocumentHighlight>>>> {
13933        Some(self.update(cx, |project, cx| {
13934            project.document_highlights(buffer, position, cx)
13935        }))
13936    }
13937
13938    fn definitions(
13939        &self,
13940        buffer: &Model<Buffer>,
13941        position: text::Anchor,
13942        kind: GotoDefinitionKind,
13943        cx: &mut AppContext,
13944    ) -> Option<Task<Result<Vec<LocationLink>>>> {
13945        Some(self.update(cx, |project, cx| match kind {
13946            GotoDefinitionKind::Symbol => project.definition(&buffer, position, cx),
13947            GotoDefinitionKind::Declaration => project.declaration(&buffer, position, cx),
13948            GotoDefinitionKind::Type => project.type_definition(&buffer, position, cx),
13949            GotoDefinitionKind::Implementation => project.implementation(&buffer, position, cx),
13950        }))
13951    }
13952
13953    fn supports_inlay_hints(&self, buffer: &Model<Buffer>, cx: &AppContext) -> bool {
13954        // TODO: make this work for remote projects
13955        self.read(cx)
13956            .language_servers_for_local_buffer(buffer.read(cx), cx)
13957            .any(
13958                |(_, server)| match server.capabilities().inlay_hint_provider {
13959                    Some(lsp::OneOf::Left(enabled)) => enabled,
13960                    Some(lsp::OneOf::Right(_)) => true,
13961                    None => false,
13962                },
13963            )
13964    }
13965
13966    fn inlay_hints(
13967        &self,
13968        buffer_handle: Model<Buffer>,
13969        range: Range<text::Anchor>,
13970        cx: &mut AppContext,
13971    ) -> Option<Task<anyhow::Result<Vec<InlayHint>>>> {
13972        Some(self.update(cx, |project, cx| {
13973            project.inlay_hints(buffer_handle, range, cx)
13974        }))
13975    }
13976
13977    fn resolve_inlay_hint(
13978        &self,
13979        hint: InlayHint,
13980        buffer_handle: Model<Buffer>,
13981        server_id: LanguageServerId,
13982        cx: &mut AppContext,
13983    ) -> Option<Task<anyhow::Result<InlayHint>>> {
13984        Some(self.update(cx, |project, cx| {
13985            project.resolve_inlay_hint(hint, buffer_handle, server_id, cx)
13986        }))
13987    }
13988
13989    fn range_for_rename(
13990        &self,
13991        buffer: &Model<Buffer>,
13992        position: text::Anchor,
13993        cx: &mut AppContext,
13994    ) -> Option<Task<Result<Option<Range<text::Anchor>>>>> {
13995        Some(self.update(cx, |project, cx| {
13996            let buffer = buffer.clone();
13997            let task = project.prepare_rename(buffer.clone(), position, cx);
13998            cx.spawn(|_, mut cx| async move {
13999                Ok(match task.await? {
14000                    PrepareRenameResponse::Success(range) => Some(range),
14001                    PrepareRenameResponse::InvalidPosition => None,
14002                    PrepareRenameResponse::OnlyUnpreparedRenameSupported => {
14003                        // Fallback on using TreeSitter info to determine identifier range
14004                        buffer.update(&mut cx, |buffer, _| {
14005                            let snapshot = buffer.snapshot();
14006                            let (range, kind) = snapshot.surrounding_word(position);
14007                            if kind != Some(CharKind::Word) {
14008                                return None;
14009                            }
14010                            Some(
14011                                snapshot.anchor_before(range.start)
14012                                    ..snapshot.anchor_after(range.end),
14013                            )
14014                        })?
14015                    }
14016                })
14017            })
14018        }))
14019    }
14020
14021    fn perform_rename(
14022        &self,
14023        buffer: &Model<Buffer>,
14024        position: text::Anchor,
14025        new_name: String,
14026        cx: &mut AppContext,
14027    ) -> Option<Task<Result<ProjectTransaction>>> {
14028        Some(self.update(cx, |project, cx| {
14029            project.perform_rename(buffer.clone(), position, new_name, cx)
14030        }))
14031    }
14032}
14033
14034fn inlay_hint_settings(
14035    location: Anchor,
14036    snapshot: &MultiBufferSnapshot,
14037    cx: &mut ViewContext<Editor>,
14038) -> InlayHintSettings {
14039    let file = snapshot.file_at(location);
14040    let language = snapshot.language_at(location).map(|l| l.name());
14041    language_settings(language, file, cx).inlay_hints
14042}
14043
14044fn consume_contiguous_rows(
14045    contiguous_row_selections: &mut Vec<Selection<Point>>,
14046    selection: &Selection<Point>,
14047    display_map: &DisplaySnapshot,
14048    selections: &mut Peekable<std::slice::Iter<Selection<Point>>>,
14049) -> (MultiBufferRow, MultiBufferRow) {
14050    contiguous_row_selections.push(selection.clone());
14051    let start_row = MultiBufferRow(selection.start.row);
14052    let mut end_row = ending_row(selection, display_map);
14053
14054    while let Some(next_selection) = selections.peek() {
14055        if next_selection.start.row <= end_row.0 {
14056            end_row = ending_row(next_selection, display_map);
14057            contiguous_row_selections.push(selections.next().unwrap().clone());
14058        } else {
14059            break;
14060        }
14061    }
14062    (start_row, end_row)
14063}
14064
14065fn ending_row(next_selection: &Selection<Point>, display_map: &DisplaySnapshot) -> MultiBufferRow {
14066    if next_selection.end.column > 0 || next_selection.is_empty() {
14067        MultiBufferRow(display_map.next_line_boundary(next_selection.end).0.row + 1)
14068    } else {
14069        MultiBufferRow(next_selection.end.row)
14070    }
14071}
14072
14073impl EditorSnapshot {
14074    pub fn remote_selections_in_range<'a>(
14075        &'a self,
14076        range: &'a Range<Anchor>,
14077        collaboration_hub: &dyn CollaborationHub,
14078        cx: &'a AppContext,
14079    ) -> impl 'a + Iterator<Item = RemoteSelection> {
14080        let participant_names = collaboration_hub.user_names(cx);
14081        let participant_indices = collaboration_hub.user_participant_indices(cx);
14082        let collaborators_by_peer_id = collaboration_hub.collaborators(cx);
14083        let collaborators_by_replica_id = collaborators_by_peer_id
14084            .iter()
14085            .map(|(_, collaborator)| (collaborator.replica_id, collaborator))
14086            .collect::<HashMap<_, _>>();
14087        self.buffer_snapshot
14088            .selections_in_range(range, false)
14089            .filter_map(move |(replica_id, line_mode, cursor_shape, selection)| {
14090                let collaborator = collaborators_by_replica_id.get(&replica_id)?;
14091                let participant_index = participant_indices.get(&collaborator.user_id).copied();
14092                let user_name = participant_names.get(&collaborator.user_id).cloned();
14093                Some(RemoteSelection {
14094                    replica_id,
14095                    selection,
14096                    cursor_shape,
14097                    line_mode,
14098                    participant_index,
14099                    peer_id: collaborator.peer_id,
14100                    user_name,
14101                })
14102            })
14103    }
14104
14105    pub fn language_at<T: ToOffset>(&self, position: T) -> Option<&Arc<Language>> {
14106        self.display_snapshot.buffer_snapshot.language_at(position)
14107    }
14108
14109    pub fn is_focused(&self) -> bool {
14110        self.is_focused
14111    }
14112
14113    pub fn placeholder_text(&self) -> Option<&Arc<str>> {
14114        self.placeholder_text.as_ref()
14115    }
14116
14117    pub fn scroll_position(&self) -> gpui::Point<f32> {
14118        self.scroll_anchor.scroll_position(&self.display_snapshot)
14119    }
14120
14121    fn gutter_dimensions(
14122        &self,
14123        font_id: FontId,
14124        font_size: Pixels,
14125        em_width: Pixels,
14126        em_advance: Pixels,
14127        max_line_number_width: Pixels,
14128        cx: &AppContext,
14129    ) -> GutterDimensions {
14130        if !self.show_gutter {
14131            return GutterDimensions::default();
14132        }
14133        let descent = cx.text_system().descent(font_id, font_size);
14134
14135        let show_git_gutter = self.show_git_diff_gutter.unwrap_or_else(|| {
14136            matches!(
14137                ProjectSettings::get_global(cx).git.git_gutter,
14138                Some(GitGutterSetting::TrackedFiles)
14139            )
14140        });
14141        let gutter_settings = EditorSettings::get_global(cx).gutter;
14142        let show_line_numbers = self
14143            .show_line_numbers
14144            .unwrap_or(gutter_settings.line_numbers);
14145        let line_gutter_width = if show_line_numbers {
14146            // Avoid flicker-like gutter resizes when the line number gains another digit and only resize the gutter on files with N*10^5 lines.
14147            let min_width_for_number_on_gutter = em_advance * 4.0;
14148            max_line_number_width.max(min_width_for_number_on_gutter)
14149        } else {
14150            0.0.into()
14151        };
14152
14153        let show_code_actions = self
14154            .show_code_actions
14155            .unwrap_or(gutter_settings.code_actions);
14156
14157        let show_runnables = self.show_runnables.unwrap_or(gutter_settings.runnables);
14158
14159        let git_blame_entries_width =
14160            self.git_blame_gutter_max_author_length
14161                .map(|max_author_length| {
14162                    // Length of the author name, but also space for the commit hash,
14163                    // the spacing and the timestamp.
14164                    let max_char_count = max_author_length
14165                        .min(GIT_BLAME_MAX_AUTHOR_CHARS_DISPLAYED)
14166                        + 7 // length of commit sha
14167                        + 14 // length of max relative timestamp ("60 minutes ago")
14168                        + 4; // gaps and margins
14169
14170                    em_advance * max_char_count
14171                });
14172
14173        let mut left_padding = git_blame_entries_width.unwrap_or(Pixels::ZERO);
14174        left_padding += if show_code_actions || show_runnables {
14175            em_width * 3.0
14176        } else if show_git_gutter && show_line_numbers {
14177            em_width * 2.0
14178        } else if show_git_gutter || show_line_numbers {
14179            em_width
14180        } else {
14181            px(0.)
14182        };
14183
14184        let right_padding = if gutter_settings.folds && show_line_numbers {
14185            em_width * 4.0
14186        } else if gutter_settings.folds {
14187            em_width * 3.0
14188        } else if show_line_numbers {
14189            em_width
14190        } else {
14191            px(0.)
14192        };
14193
14194        GutterDimensions {
14195            left_padding,
14196            right_padding,
14197            width: line_gutter_width + left_padding + right_padding,
14198            margin: -descent,
14199            git_blame_entries_width,
14200        }
14201    }
14202
14203    pub fn render_crease_toggle(
14204        &self,
14205        buffer_row: MultiBufferRow,
14206        row_contains_cursor: bool,
14207        editor: View<Editor>,
14208        cx: &mut WindowContext,
14209    ) -> Option<AnyElement> {
14210        let folded = self.is_line_folded(buffer_row);
14211        let mut is_foldable = false;
14212
14213        if let Some(crease) = self
14214            .crease_snapshot
14215            .query_row(buffer_row, &self.buffer_snapshot)
14216        {
14217            is_foldable = true;
14218            match crease {
14219                Crease::Inline { render_toggle, .. } | Crease::Block { render_toggle, .. } => {
14220                    if let Some(render_toggle) = render_toggle {
14221                        let toggle_callback = Arc::new(move |folded, cx: &mut WindowContext| {
14222                            if folded {
14223                                editor.update(cx, |editor, cx| {
14224                                    editor.fold_at(&crate::FoldAt { buffer_row }, cx)
14225                                });
14226                            } else {
14227                                editor.update(cx, |editor, cx| {
14228                                    editor.unfold_at(&crate::UnfoldAt { buffer_row }, cx)
14229                                });
14230                            }
14231                        });
14232                        return Some((render_toggle)(buffer_row, folded, toggle_callback, cx));
14233                    }
14234                }
14235            }
14236        }
14237
14238        is_foldable |= self.starts_indent(buffer_row);
14239
14240        if folded || (is_foldable && (row_contains_cursor || self.gutter_hovered)) {
14241            Some(
14242                Disclosure::new(("gutter_crease", buffer_row.0), !folded)
14243                    .toggle_state(folded)
14244                    .on_click(cx.listener_for(&editor, move |this, _e, cx| {
14245                        if folded {
14246                            this.unfold_at(&UnfoldAt { buffer_row }, cx);
14247                        } else {
14248                            this.fold_at(&FoldAt { buffer_row }, cx);
14249                        }
14250                    }))
14251                    .into_any_element(),
14252            )
14253        } else {
14254            None
14255        }
14256    }
14257
14258    pub fn render_crease_trailer(
14259        &self,
14260        buffer_row: MultiBufferRow,
14261        cx: &mut WindowContext,
14262    ) -> Option<AnyElement> {
14263        let folded = self.is_line_folded(buffer_row);
14264        if let Crease::Inline { render_trailer, .. } = self
14265            .crease_snapshot
14266            .query_row(buffer_row, &self.buffer_snapshot)?
14267        {
14268            let render_trailer = render_trailer.as_ref()?;
14269            Some(render_trailer(buffer_row, folded, cx))
14270        } else {
14271            None
14272        }
14273    }
14274}
14275
14276impl Deref for EditorSnapshot {
14277    type Target = DisplaySnapshot;
14278
14279    fn deref(&self) -> &Self::Target {
14280        &self.display_snapshot
14281    }
14282}
14283
14284#[derive(Clone, Debug, PartialEq, Eq)]
14285pub enum EditorEvent {
14286    InputIgnored {
14287        text: Arc<str>,
14288    },
14289    InputHandled {
14290        utf16_range_to_replace: Option<Range<isize>>,
14291        text: Arc<str>,
14292    },
14293    ExcerptsAdded {
14294        buffer: Model<Buffer>,
14295        predecessor: ExcerptId,
14296        excerpts: Vec<(ExcerptId, ExcerptRange<language::Anchor>)>,
14297    },
14298    ExcerptsRemoved {
14299        ids: Vec<ExcerptId>,
14300    },
14301    BufferFoldToggled {
14302        ids: Vec<ExcerptId>,
14303        folded: bool,
14304    },
14305    ExcerptsEdited {
14306        ids: Vec<ExcerptId>,
14307    },
14308    ExcerptsExpanded {
14309        ids: Vec<ExcerptId>,
14310    },
14311    BufferEdited,
14312    Edited {
14313        transaction_id: clock::Lamport,
14314    },
14315    Reparsed(BufferId),
14316    Focused,
14317    FocusedIn,
14318    Blurred,
14319    DirtyChanged,
14320    Saved,
14321    TitleChanged,
14322    DiffBaseChanged,
14323    SelectionsChanged {
14324        local: bool,
14325    },
14326    ScrollPositionChanged {
14327        local: bool,
14328        autoscroll: bool,
14329    },
14330    Closed,
14331    TransactionUndone {
14332        transaction_id: clock::Lamport,
14333    },
14334    TransactionBegun {
14335        transaction_id: clock::Lamport,
14336    },
14337    Reloaded,
14338    CursorShapeChanged,
14339}
14340
14341impl EventEmitter<EditorEvent> for Editor {}
14342
14343impl FocusableView for Editor {
14344    fn focus_handle(&self, _cx: &AppContext) -> FocusHandle {
14345        self.focus_handle.clone()
14346    }
14347}
14348
14349impl Render for Editor {
14350    fn render<'a>(&mut self, cx: &mut ViewContext<'a, Self>) -> impl IntoElement {
14351        let settings = ThemeSettings::get_global(cx);
14352
14353        let mut text_style = match self.mode {
14354            EditorMode::SingleLine { .. } | EditorMode::AutoHeight { .. } => TextStyle {
14355                color: cx.theme().colors().editor_foreground,
14356                font_family: settings.ui_font.family.clone(),
14357                font_features: settings.ui_font.features.clone(),
14358                font_fallbacks: settings.ui_font.fallbacks.clone(),
14359                font_size: rems(0.875).into(),
14360                font_weight: settings.ui_font.weight,
14361                line_height: relative(settings.buffer_line_height.value()),
14362                ..Default::default()
14363            },
14364            EditorMode::Full => TextStyle {
14365                color: cx.theme().colors().editor_foreground,
14366                font_family: settings.buffer_font.family.clone(),
14367                font_features: settings.buffer_font.features.clone(),
14368                font_fallbacks: settings.buffer_font.fallbacks.clone(),
14369                font_size: settings.buffer_font_size(cx).into(),
14370                font_weight: settings.buffer_font.weight,
14371                line_height: relative(settings.buffer_line_height.value()),
14372                ..Default::default()
14373            },
14374        };
14375        if let Some(text_style_refinement) = &self.text_style_refinement {
14376            text_style.refine(text_style_refinement)
14377        }
14378
14379        let background = match self.mode {
14380            EditorMode::SingleLine { .. } => cx.theme().system().transparent,
14381            EditorMode::AutoHeight { max_lines: _ } => cx.theme().system().transparent,
14382            EditorMode::Full => cx.theme().colors().editor_background,
14383        };
14384
14385        EditorElement::new(
14386            cx.view(),
14387            EditorStyle {
14388                background,
14389                local_player: cx.theme().players().local(),
14390                text: text_style,
14391                scrollbar_width: EditorElement::SCROLLBAR_WIDTH,
14392                syntax: cx.theme().syntax().clone(),
14393                status: cx.theme().status().clone(),
14394                inlay_hints_style: make_inlay_hints_style(cx),
14395                inline_completion_styles: make_suggestion_styles(cx),
14396                unnecessary_code_fade: ThemeSettings::get_global(cx).unnecessary_code_fade,
14397            },
14398        )
14399    }
14400}
14401
14402impl ViewInputHandler for Editor {
14403    fn text_for_range(
14404        &mut self,
14405        range_utf16: Range<usize>,
14406        adjusted_range: &mut Option<Range<usize>>,
14407        cx: &mut ViewContext<Self>,
14408    ) -> Option<String> {
14409        let snapshot = self.buffer.read(cx).read(cx);
14410        let start = snapshot.clip_offset_utf16(OffsetUtf16(range_utf16.start), Bias::Left);
14411        let end = snapshot.clip_offset_utf16(OffsetUtf16(range_utf16.end), Bias::Right);
14412        if (start.0..end.0) != range_utf16 {
14413            adjusted_range.replace(start.0..end.0);
14414        }
14415        Some(snapshot.text_for_range(start..end).collect())
14416    }
14417
14418    fn selected_text_range(
14419        &mut self,
14420        ignore_disabled_input: bool,
14421        cx: &mut ViewContext<Self>,
14422    ) -> Option<UTF16Selection> {
14423        // Prevent the IME menu from appearing when holding down an alphabetic key
14424        // while input is disabled.
14425        if !ignore_disabled_input && !self.input_enabled {
14426            return None;
14427        }
14428
14429        let selection = self.selections.newest::<OffsetUtf16>(cx);
14430        let range = selection.range();
14431
14432        Some(UTF16Selection {
14433            range: range.start.0..range.end.0,
14434            reversed: selection.reversed,
14435        })
14436    }
14437
14438    fn marked_text_range(&self, cx: &mut ViewContext<Self>) -> Option<Range<usize>> {
14439        let snapshot = self.buffer.read(cx).read(cx);
14440        let range = self.text_highlights::<InputComposition>(cx)?.1.first()?;
14441        Some(range.start.to_offset_utf16(&snapshot).0..range.end.to_offset_utf16(&snapshot).0)
14442    }
14443
14444    fn unmark_text(&mut self, cx: &mut ViewContext<Self>) {
14445        self.clear_highlights::<InputComposition>(cx);
14446        self.ime_transaction.take();
14447    }
14448
14449    fn replace_text_in_range(
14450        &mut self,
14451        range_utf16: Option<Range<usize>>,
14452        text: &str,
14453        cx: &mut ViewContext<Self>,
14454    ) {
14455        if !self.input_enabled {
14456            cx.emit(EditorEvent::InputIgnored { text: text.into() });
14457            return;
14458        }
14459
14460        self.transact(cx, |this, cx| {
14461            let new_selected_ranges = if let Some(range_utf16) = range_utf16 {
14462                let range_utf16 = OffsetUtf16(range_utf16.start)..OffsetUtf16(range_utf16.end);
14463                Some(this.selection_replacement_ranges(range_utf16, cx))
14464            } else {
14465                this.marked_text_ranges(cx)
14466            };
14467
14468            let range_to_replace = new_selected_ranges.as_ref().and_then(|ranges_to_replace| {
14469                let newest_selection_id = this.selections.newest_anchor().id;
14470                this.selections
14471                    .all::<OffsetUtf16>(cx)
14472                    .iter()
14473                    .zip(ranges_to_replace.iter())
14474                    .find_map(|(selection, range)| {
14475                        if selection.id == newest_selection_id {
14476                            Some(
14477                                (range.start.0 as isize - selection.head().0 as isize)
14478                                    ..(range.end.0 as isize - selection.head().0 as isize),
14479                            )
14480                        } else {
14481                            None
14482                        }
14483                    })
14484            });
14485
14486            cx.emit(EditorEvent::InputHandled {
14487                utf16_range_to_replace: range_to_replace,
14488                text: text.into(),
14489            });
14490
14491            if let Some(new_selected_ranges) = new_selected_ranges {
14492                this.change_selections(None, cx, |selections| {
14493                    selections.select_ranges(new_selected_ranges)
14494                });
14495                this.backspace(&Default::default(), cx);
14496            }
14497
14498            this.handle_input(text, cx);
14499        });
14500
14501        if let Some(transaction) = self.ime_transaction {
14502            self.buffer.update(cx, |buffer, cx| {
14503                buffer.group_until_transaction(transaction, cx);
14504            });
14505        }
14506
14507        self.unmark_text(cx);
14508    }
14509
14510    fn replace_and_mark_text_in_range(
14511        &mut self,
14512        range_utf16: Option<Range<usize>>,
14513        text: &str,
14514        new_selected_range_utf16: Option<Range<usize>>,
14515        cx: &mut ViewContext<Self>,
14516    ) {
14517        if !self.input_enabled {
14518            return;
14519        }
14520
14521        let transaction = self.transact(cx, |this, cx| {
14522            let ranges_to_replace = if let Some(mut marked_ranges) = this.marked_text_ranges(cx) {
14523                let snapshot = this.buffer.read(cx).read(cx);
14524                if let Some(relative_range_utf16) = range_utf16.as_ref() {
14525                    for marked_range in &mut marked_ranges {
14526                        marked_range.end.0 = marked_range.start.0 + relative_range_utf16.end;
14527                        marked_range.start.0 += relative_range_utf16.start;
14528                        marked_range.start =
14529                            snapshot.clip_offset_utf16(marked_range.start, Bias::Left);
14530                        marked_range.end =
14531                            snapshot.clip_offset_utf16(marked_range.end, Bias::Right);
14532                    }
14533                }
14534                Some(marked_ranges)
14535            } else if let Some(range_utf16) = range_utf16 {
14536                let range_utf16 = OffsetUtf16(range_utf16.start)..OffsetUtf16(range_utf16.end);
14537                Some(this.selection_replacement_ranges(range_utf16, cx))
14538            } else {
14539                None
14540            };
14541
14542            let range_to_replace = ranges_to_replace.as_ref().and_then(|ranges_to_replace| {
14543                let newest_selection_id = this.selections.newest_anchor().id;
14544                this.selections
14545                    .all::<OffsetUtf16>(cx)
14546                    .iter()
14547                    .zip(ranges_to_replace.iter())
14548                    .find_map(|(selection, range)| {
14549                        if selection.id == newest_selection_id {
14550                            Some(
14551                                (range.start.0 as isize - selection.head().0 as isize)
14552                                    ..(range.end.0 as isize - selection.head().0 as isize),
14553                            )
14554                        } else {
14555                            None
14556                        }
14557                    })
14558            });
14559
14560            cx.emit(EditorEvent::InputHandled {
14561                utf16_range_to_replace: range_to_replace,
14562                text: text.into(),
14563            });
14564
14565            if let Some(ranges) = ranges_to_replace {
14566                this.change_selections(None, cx, |s| s.select_ranges(ranges));
14567            }
14568
14569            let marked_ranges = {
14570                let snapshot = this.buffer.read(cx).read(cx);
14571                this.selections
14572                    .disjoint_anchors()
14573                    .iter()
14574                    .map(|selection| {
14575                        selection.start.bias_left(&snapshot)..selection.end.bias_right(&snapshot)
14576                    })
14577                    .collect::<Vec<_>>()
14578            };
14579
14580            if text.is_empty() {
14581                this.unmark_text(cx);
14582            } else {
14583                this.highlight_text::<InputComposition>(
14584                    marked_ranges.clone(),
14585                    HighlightStyle {
14586                        underline: Some(UnderlineStyle {
14587                            thickness: px(1.),
14588                            color: None,
14589                            wavy: false,
14590                        }),
14591                        ..Default::default()
14592                    },
14593                    cx,
14594                );
14595            }
14596
14597            // Disable auto-closing when composing text (i.e. typing a `"` on a Brazilian keyboard)
14598            let use_autoclose = this.use_autoclose;
14599            let use_auto_surround = this.use_auto_surround;
14600            this.set_use_autoclose(false);
14601            this.set_use_auto_surround(false);
14602            this.handle_input(text, cx);
14603            this.set_use_autoclose(use_autoclose);
14604            this.set_use_auto_surround(use_auto_surround);
14605
14606            if let Some(new_selected_range) = new_selected_range_utf16 {
14607                let snapshot = this.buffer.read(cx).read(cx);
14608                let new_selected_ranges = marked_ranges
14609                    .into_iter()
14610                    .map(|marked_range| {
14611                        let insertion_start = marked_range.start.to_offset_utf16(&snapshot).0;
14612                        let new_start = OffsetUtf16(new_selected_range.start + insertion_start);
14613                        let new_end = OffsetUtf16(new_selected_range.end + insertion_start);
14614                        snapshot.clip_offset_utf16(new_start, Bias::Left)
14615                            ..snapshot.clip_offset_utf16(new_end, Bias::Right)
14616                    })
14617                    .collect::<Vec<_>>();
14618
14619                drop(snapshot);
14620                this.change_selections(None, cx, |selections| {
14621                    selections.select_ranges(new_selected_ranges)
14622                });
14623            }
14624        });
14625
14626        self.ime_transaction = self.ime_transaction.or(transaction);
14627        if let Some(transaction) = self.ime_transaction {
14628            self.buffer.update(cx, |buffer, cx| {
14629                buffer.group_until_transaction(transaction, cx);
14630            });
14631        }
14632
14633        if self.text_highlights::<InputComposition>(cx).is_none() {
14634            self.ime_transaction.take();
14635        }
14636    }
14637
14638    fn bounds_for_range(
14639        &mut self,
14640        range_utf16: Range<usize>,
14641        element_bounds: gpui::Bounds<Pixels>,
14642        cx: &mut ViewContext<Self>,
14643    ) -> Option<gpui::Bounds<Pixels>> {
14644        let text_layout_details = self.text_layout_details(cx);
14645        let gpui::Point {
14646            x: em_width,
14647            y: line_height,
14648        } = self.character_size(cx);
14649
14650        let snapshot = self.snapshot(cx);
14651        let scroll_position = snapshot.scroll_position();
14652        let scroll_left = scroll_position.x * em_width;
14653
14654        let start = OffsetUtf16(range_utf16.start).to_display_point(&snapshot);
14655        let x = snapshot.x_for_display_point(start, &text_layout_details) - scroll_left
14656            + self.gutter_dimensions.width
14657            + self.gutter_dimensions.margin;
14658        let y = line_height * (start.row().as_f32() - scroll_position.y);
14659
14660        Some(Bounds {
14661            origin: element_bounds.origin + point(x, y),
14662            size: size(em_width, line_height),
14663        })
14664    }
14665}
14666
14667trait SelectionExt {
14668    fn display_range(&self, map: &DisplaySnapshot) -> Range<DisplayPoint>;
14669    fn spanned_rows(
14670        &self,
14671        include_end_if_at_line_start: bool,
14672        map: &DisplaySnapshot,
14673    ) -> Range<MultiBufferRow>;
14674}
14675
14676impl<T: ToPoint + ToOffset> SelectionExt for Selection<T> {
14677    fn display_range(&self, map: &DisplaySnapshot) -> Range<DisplayPoint> {
14678        let start = self
14679            .start
14680            .to_point(&map.buffer_snapshot)
14681            .to_display_point(map);
14682        let end = self
14683            .end
14684            .to_point(&map.buffer_snapshot)
14685            .to_display_point(map);
14686        if self.reversed {
14687            end..start
14688        } else {
14689            start..end
14690        }
14691    }
14692
14693    fn spanned_rows(
14694        &self,
14695        include_end_if_at_line_start: bool,
14696        map: &DisplaySnapshot,
14697    ) -> Range<MultiBufferRow> {
14698        let start = self.start.to_point(&map.buffer_snapshot);
14699        let mut end = self.end.to_point(&map.buffer_snapshot);
14700        if !include_end_if_at_line_start && start.row != end.row && end.column == 0 {
14701            end.row -= 1;
14702        }
14703
14704        let buffer_start = map.prev_line_boundary(start).0;
14705        let buffer_end = map.next_line_boundary(end).0;
14706        MultiBufferRow(buffer_start.row)..MultiBufferRow(buffer_end.row + 1)
14707    }
14708}
14709
14710impl<T: InvalidationRegion> InvalidationStack<T> {
14711    fn invalidate<S>(&mut self, selections: &[Selection<S>], buffer: &MultiBufferSnapshot)
14712    where
14713        S: Clone + ToOffset,
14714    {
14715        while let Some(region) = self.last() {
14716            let all_selections_inside_invalidation_ranges =
14717                if selections.len() == region.ranges().len() {
14718                    selections
14719                        .iter()
14720                        .zip(region.ranges().iter().map(|r| r.to_offset(buffer)))
14721                        .all(|(selection, invalidation_range)| {
14722                            let head = selection.head().to_offset(buffer);
14723                            invalidation_range.start <= head && invalidation_range.end >= head
14724                        })
14725                } else {
14726                    false
14727                };
14728
14729            if all_selections_inside_invalidation_ranges {
14730                break;
14731            } else {
14732                self.pop();
14733            }
14734        }
14735    }
14736}
14737
14738impl<T> Default for InvalidationStack<T> {
14739    fn default() -> Self {
14740        Self(Default::default())
14741    }
14742}
14743
14744impl<T> Deref for InvalidationStack<T> {
14745    type Target = Vec<T>;
14746
14747    fn deref(&self) -> &Self::Target {
14748        &self.0
14749    }
14750}
14751
14752impl<T> DerefMut for InvalidationStack<T> {
14753    fn deref_mut(&mut self) -> &mut Self::Target {
14754        &mut self.0
14755    }
14756}
14757
14758impl InvalidationRegion for SnippetState {
14759    fn ranges(&self) -> &[Range<Anchor>] {
14760        &self.ranges[self.active_index]
14761    }
14762}
14763
14764pub fn diagnostic_block_renderer(
14765    diagnostic: Diagnostic,
14766    max_message_rows: Option<u8>,
14767    allow_closing: bool,
14768    _is_valid: bool,
14769) -> RenderBlock {
14770    let (text_without_backticks, code_ranges) =
14771        highlight_diagnostic_message(&diagnostic, max_message_rows);
14772
14773    Arc::new(move |cx: &mut BlockContext| {
14774        let group_id: SharedString = cx.block_id.to_string().into();
14775
14776        let mut text_style = cx.text_style().clone();
14777        text_style.color = diagnostic_style(diagnostic.severity, cx.theme().status());
14778        let theme_settings = ThemeSettings::get_global(cx);
14779        text_style.font_family = theme_settings.buffer_font.family.clone();
14780        text_style.font_style = theme_settings.buffer_font.style;
14781        text_style.font_features = theme_settings.buffer_font.features.clone();
14782        text_style.font_weight = theme_settings.buffer_font.weight;
14783
14784        let multi_line_diagnostic = diagnostic.message.contains('\n');
14785
14786        let buttons = |diagnostic: &Diagnostic| {
14787            if multi_line_diagnostic {
14788                v_flex()
14789            } else {
14790                h_flex()
14791            }
14792            .when(allow_closing, |div| {
14793                div.children(diagnostic.is_primary.then(|| {
14794                    IconButton::new("close-block", IconName::XCircle)
14795                        .icon_color(Color::Muted)
14796                        .size(ButtonSize::Compact)
14797                        .style(ButtonStyle::Transparent)
14798                        .visible_on_hover(group_id.clone())
14799                        .on_click(move |_click, cx| cx.dispatch_action(Box::new(Cancel)))
14800                        .tooltip(|cx| Tooltip::for_action("Close Diagnostics", &Cancel, cx))
14801                }))
14802            })
14803            .child(
14804                IconButton::new("copy-block", IconName::Copy)
14805                    .icon_color(Color::Muted)
14806                    .size(ButtonSize::Compact)
14807                    .style(ButtonStyle::Transparent)
14808                    .visible_on_hover(group_id.clone())
14809                    .on_click({
14810                        let message = diagnostic.message.clone();
14811                        move |_click, cx| {
14812                            cx.write_to_clipboard(ClipboardItem::new_string(message.clone()))
14813                        }
14814                    })
14815                    .tooltip(|cx| Tooltip::text("Copy diagnostic message", cx)),
14816            )
14817        };
14818
14819        let icon_size = buttons(&diagnostic)
14820            .into_any_element()
14821            .layout_as_root(AvailableSpace::min_size(), cx);
14822
14823        h_flex()
14824            .id(cx.block_id)
14825            .group(group_id.clone())
14826            .relative()
14827            .size_full()
14828            .block_mouse_down()
14829            .pl(cx.gutter_dimensions.width)
14830            .w(cx.max_width - cx.gutter_dimensions.full_width())
14831            .child(
14832                div()
14833                    .flex()
14834                    .w(cx.anchor_x - cx.gutter_dimensions.width - icon_size.width)
14835                    .flex_shrink(),
14836            )
14837            .child(buttons(&diagnostic))
14838            .child(div().flex().flex_shrink_0().child(
14839                StyledText::new(text_without_backticks.clone()).with_highlights(
14840                    &text_style,
14841                    code_ranges.iter().map(|range| {
14842                        (
14843                            range.clone(),
14844                            HighlightStyle {
14845                                font_weight: Some(FontWeight::BOLD),
14846                                ..Default::default()
14847                            },
14848                        )
14849                    }),
14850                ),
14851            ))
14852            .into_any_element()
14853    })
14854}
14855
14856fn inline_completion_edit_text(
14857    editor_snapshot: &EditorSnapshot,
14858    edits: &Vec<(Range<Anchor>, String)>,
14859    include_deletions: bool,
14860    cx: &WindowContext,
14861) -> InlineCompletionText {
14862    let edit_start = edits
14863        .first()
14864        .unwrap()
14865        .0
14866        .start
14867        .to_display_point(editor_snapshot);
14868
14869    let mut text = String::new();
14870    let mut offset = DisplayPoint::new(edit_start.row(), 0).to_offset(editor_snapshot, Bias::Left);
14871    let mut highlights = Vec::new();
14872    for (old_range, new_text) in edits {
14873        let old_offset_range = old_range.to_offset(&editor_snapshot.buffer_snapshot);
14874        text.extend(
14875            editor_snapshot
14876                .buffer_snapshot
14877                .chunks(offset..old_offset_range.start, false)
14878                .map(|chunk| chunk.text),
14879        );
14880        offset = old_offset_range.end;
14881
14882        let start = text.len();
14883        let color = if include_deletions && new_text.is_empty() {
14884            text.extend(
14885                editor_snapshot
14886                    .buffer_snapshot
14887                    .chunks(old_offset_range.start..offset, false)
14888                    .map(|chunk| chunk.text),
14889            );
14890            cx.theme().status().deleted_background
14891        } else {
14892            text.push_str(new_text);
14893            cx.theme().status().created_background
14894        };
14895        let end = text.len();
14896
14897        highlights.push((
14898            start..end,
14899            HighlightStyle {
14900                background_color: Some(color),
14901                ..Default::default()
14902            },
14903        ));
14904    }
14905
14906    let edit_end = edits
14907        .last()
14908        .unwrap()
14909        .0
14910        .end
14911        .to_display_point(editor_snapshot);
14912    let end_of_line = DisplayPoint::new(edit_end.row(), editor_snapshot.line_len(edit_end.row()))
14913        .to_offset(editor_snapshot, Bias::Right);
14914    text.extend(
14915        editor_snapshot
14916            .buffer_snapshot
14917            .chunks(offset..end_of_line, false)
14918            .map(|chunk| chunk.text),
14919    );
14920
14921    InlineCompletionText::Edit {
14922        text: text.into(),
14923        highlights,
14924    }
14925}
14926
14927pub fn highlight_diagnostic_message(
14928    diagnostic: &Diagnostic,
14929    mut max_message_rows: Option<u8>,
14930) -> (SharedString, Vec<Range<usize>>) {
14931    let mut text_without_backticks = String::new();
14932    let mut code_ranges = Vec::new();
14933
14934    if let Some(source) = &diagnostic.source {
14935        text_without_backticks.push_str(source);
14936        code_ranges.push(0..source.len());
14937        text_without_backticks.push_str(": ");
14938    }
14939
14940    let mut prev_offset = 0;
14941    let mut in_code_block = false;
14942    let has_row_limit = max_message_rows.is_some();
14943    let mut newline_indices = diagnostic
14944        .message
14945        .match_indices('\n')
14946        .filter(|_| has_row_limit)
14947        .map(|(ix, _)| ix)
14948        .fuse()
14949        .peekable();
14950
14951    for (quote_ix, _) in diagnostic
14952        .message
14953        .match_indices('`')
14954        .chain([(diagnostic.message.len(), "")])
14955    {
14956        let mut first_newline_ix = None;
14957        let mut last_newline_ix = None;
14958        while let Some(newline_ix) = newline_indices.peek() {
14959            if *newline_ix < quote_ix {
14960                if first_newline_ix.is_none() {
14961                    first_newline_ix = Some(*newline_ix);
14962                }
14963                last_newline_ix = Some(*newline_ix);
14964
14965                if let Some(rows_left) = &mut max_message_rows {
14966                    if *rows_left == 0 {
14967                        break;
14968                    } else {
14969                        *rows_left -= 1;
14970                    }
14971                }
14972                let _ = newline_indices.next();
14973            } else {
14974                break;
14975            }
14976        }
14977        let prev_len = text_without_backticks.len();
14978        let new_text = &diagnostic.message[prev_offset..first_newline_ix.unwrap_or(quote_ix)];
14979        text_without_backticks.push_str(new_text);
14980        if in_code_block {
14981            code_ranges.push(prev_len..text_without_backticks.len());
14982        }
14983        prev_offset = last_newline_ix.unwrap_or(quote_ix) + 1;
14984        in_code_block = !in_code_block;
14985        if first_newline_ix.map_or(false, |newline_ix| newline_ix < quote_ix) {
14986            text_without_backticks.push_str("...");
14987            break;
14988        }
14989    }
14990
14991    (text_without_backticks.into(), code_ranges)
14992}
14993
14994fn diagnostic_style(severity: DiagnosticSeverity, colors: &StatusColors) -> Hsla {
14995    match severity {
14996        DiagnosticSeverity::ERROR => colors.error,
14997        DiagnosticSeverity::WARNING => colors.warning,
14998        DiagnosticSeverity::INFORMATION => colors.info,
14999        DiagnosticSeverity::HINT => colors.info,
15000        _ => colors.ignored,
15001    }
15002}
15003
15004pub fn styled_runs_for_code_label<'a>(
15005    label: &'a CodeLabel,
15006    syntax_theme: &'a theme::SyntaxTheme,
15007) -> impl 'a + Iterator<Item = (Range<usize>, HighlightStyle)> {
15008    let fade_out = HighlightStyle {
15009        fade_out: Some(0.35),
15010        ..Default::default()
15011    };
15012
15013    let mut prev_end = label.filter_range.end;
15014    label
15015        .runs
15016        .iter()
15017        .enumerate()
15018        .flat_map(move |(ix, (range, highlight_id))| {
15019            let style = if let Some(style) = highlight_id.style(syntax_theme) {
15020                style
15021            } else {
15022                return Default::default();
15023            };
15024            let mut muted_style = style;
15025            muted_style.highlight(fade_out);
15026
15027            let mut runs = SmallVec::<[(Range<usize>, HighlightStyle); 3]>::new();
15028            if range.start >= label.filter_range.end {
15029                if range.start > prev_end {
15030                    runs.push((prev_end..range.start, fade_out));
15031                }
15032                runs.push((range.clone(), muted_style));
15033            } else if range.end <= label.filter_range.end {
15034                runs.push((range.clone(), style));
15035            } else {
15036                runs.push((range.start..label.filter_range.end, style));
15037                runs.push((label.filter_range.end..range.end, muted_style));
15038            }
15039            prev_end = cmp::max(prev_end, range.end);
15040
15041            if ix + 1 == label.runs.len() && label.text.len() > prev_end {
15042                runs.push((prev_end..label.text.len(), fade_out));
15043            }
15044
15045            runs
15046        })
15047}
15048
15049pub(crate) fn split_words(text: &str) -> impl std::iter::Iterator<Item = &str> + '_ {
15050    let mut prev_index = 0;
15051    let mut prev_codepoint: Option<char> = None;
15052    text.char_indices()
15053        .chain([(text.len(), '\0')])
15054        .filter_map(move |(index, codepoint)| {
15055            let prev_codepoint = prev_codepoint.replace(codepoint)?;
15056            let is_boundary = index == text.len()
15057                || !prev_codepoint.is_uppercase() && codepoint.is_uppercase()
15058                || !prev_codepoint.is_alphanumeric() && codepoint.is_alphanumeric();
15059            if is_boundary {
15060                let chunk = &text[prev_index..index];
15061                prev_index = index;
15062                Some(chunk)
15063            } else {
15064                None
15065            }
15066        })
15067}
15068
15069pub trait RangeToAnchorExt: Sized {
15070    fn to_anchors(self, snapshot: &MultiBufferSnapshot) -> Range<Anchor>;
15071
15072    fn to_display_points(self, snapshot: &EditorSnapshot) -> Range<DisplayPoint> {
15073        let anchor_range = self.to_anchors(&snapshot.buffer_snapshot);
15074        anchor_range.start.to_display_point(snapshot)..anchor_range.end.to_display_point(snapshot)
15075    }
15076}
15077
15078impl<T: ToOffset> RangeToAnchorExt for Range<T> {
15079    fn to_anchors(self, snapshot: &MultiBufferSnapshot) -> Range<Anchor> {
15080        let start_offset = self.start.to_offset(snapshot);
15081        let end_offset = self.end.to_offset(snapshot);
15082        if start_offset == end_offset {
15083            snapshot.anchor_before(start_offset)..snapshot.anchor_before(end_offset)
15084        } else {
15085            snapshot.anchor_after(self.start)..snapshot.anchor_before(self.end)
15086        }
15087    }
15088}
15089
15090pub trait RowExt {
15091    fn as_f32(&self) -> f32;
15092
15093    fn next_row(&self) -> Self;
15094
15095    fn previous_row(&self) -> Self;
15096
15097    fn minus(&self, other: Self) -> u32;
15098}
15099
15100impl RowExt for DisplayRow {
15101    fn as_f32(&self) -> f32 {
15102        self.0 as f32
15103    }
15104
15105    fn next_row(&self) -> Self {
15106        Self(self.0 + 1)
15107    }
15108
15109    fn previous_row(&self) -> Self {
15110        Self(self.0.saturating_sub(1))
15111    }
15112
15113    fn minus(&self, other: Self) -> u32 {
15114        self.0 - other.0
15115    }
15116}
15117
15118impl RowExt for MultiBufferRow {
15119    fn as_f32(&self) -> f32 {
15120        self.0 as f32
15121    }
15122
15123    fn next_row(&self) -> Self {
15124        Self(self.0 + 1)
15125    }
15126
15127    fn previous_row(&self) -> Self {
15128        Self(self.0.saturating_sub(1))
15129    }
15130
15131    fn minus(&self, other: Self) -> u32 {
15132        self.0 - other.0
15133    }
15134}
15135
15136trait RowRangeExt {
15137    type Row;
15138
15139    fn len(&self) -> usize;
15140
15141    fn iter_rows(&self) -> impl DoubleEndedIterator<Item = Self::Row>;
15142}
15143
15144impl RowRangeExt for Range<MultiBufferRow> {
15145    type Row = MultiBufferRow;
15146
15147    fn len(&self) -> usize {
15148        (self.end.0 - self.start.0) as usize
15149    }
15150
15151    fn iter_rows(&self) -> impl DoubleEndedIterator<Item = MultiBufferRow> {
15152        (self.start.0..self.end.0).map(MultiBufferRow)
15153    }
15154}
15155
15156impl RowRangeExt for Range<DisplayRow> {
15157    type Row = DisplayRow;
15158
15159    fn len(&self) -> usize {
15160        (self.end.0 - self.start.0) as usize
15161    }
15162
15163    fn iter_rows(&self) -> impl DoubleEndedIterator<Item = DisplayRow> {
15164        (self.start.0..self.end.0).map(DisplayRow)
15165    }
15166}
15167
15168fn hunk_status(hunk: &MultiBufferDiffHunk) -> DiffHunkStatus {
15169    if hunk.diff_base_byte_range.is_empty() {
15170        DiffHunkStatus::Added
15171    } else if hunk.row_range.is_empty() {
15172        DiffHunkStatus::Removed
15173    } else {
15174        DiffHunkStatus::Modified
15175    }
15176}
15177
15178/// If select range has more than one line, we
15179/// just point the cursor to range.start.
15180fn check_multiline_range(buffer: &Buffer, range: Range<usize>) -> Range<usize> {
15181    if buffer.offset_to_point(range.start).row == buffer.offset_to_point(range.end).row {
15182        range
15183    } else {
15184        range.start..range.start
15185    }
15186}
15187
15188pub struct KillRing(ClipboardItem);
15189impl Global for KillRing {}
15190
15191const UPDATE_DEBOUNCE: Duration = Duration::from_millis(50);