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 debounced_delay;
   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;
   45mod signature_help;
   46#[cfg(any(test, feature = "test-support"))]
   47pub mod test;
   48
   49use ::git::diff::DiffHunkStatus;
   50pub(crate) use actions::*;
   51pub use actions::{OpenExcerpts, OpenExcerptsSplit};
   52use aho_corasick::AhoCorasick;
   53use anyhow::{anyhow, Context as _, Result};
   54use blink_manager::BlinkManager;
   55use client::{Collaborator, ParticipantIndex};
   56use clock::ReplicaId;
   57use collections::{BTreeMap, Bound, HashMap, HashSet, VecDeque};
   58use convert_case::{Case, Casing};
   59use debounced_delay::DebouncedDelay;
   60use display_map::*;
   61pub use display_map::{DisplayPoint, FoldPlaceholder};
   62pub use editor_settings::{
   63    CurrentLineHighlight, EditorSettings, ScrollBeyondLastLine, SearchSettings, ShowScrollbar,
   64};
   65pub use editor_settings_controls::*;
   66use element::LineWithInvisibles;
   67pub use element::{
   68    CursorLayout, EditorElement, HighlightedRange, HighlightedRangeLine, PointForPosition,
   69};
   70use futures::{future, FutureExt};
   71use fuzzy::{StringMatch, StringMatchCandidate};
   72use git::blame::GitBlame;
   73use gpui::{
   74    div, impl_actions, point, prelude::*, px, relative, size, uniform_list, Action, AnyElement,
   75    AppContext, AsyncWindowContext, AvailableSpace, BackgroundExecutor, Bounds, ClipboardEntry,
   76    ClipboardItem, Context, DispatchPhase, ElementId, EventEmitter, FocusHandle, FocusOutEvent,
   77    FocusableView, FontId, FontWeight, Global, HighlightStyle, Hsla, InteractiveText, KeyContext,
   78    ListSizingBehavior, Model, ModelContext, MouseButton, PaintQuad, ParentElement, Pixels, Render,
   79    ScrollStrategy, SharedString, Size, StrikethroughStyle, Styled, StyledText, Subscription, Task,
   80    TextStyle, TextStyleRefinement, UTF16Selection, UnderlineStyle, UniformListScrollHandle, View,
   81    ViewContext, ViewInputHandler, VisualContext, WeakFocusHandle, WeakView, WindowContext,
   82};
   83use highlight_matching_bracket::refresh_matching_bracket_highlights;
   84use hover_popover::{hide_hover, HoverState};
   85pub(crate) use hunk_diff::HoveredHunk;
   86use hunk_diff::{diff_hunk_to_display, ExpandedHunks};
   87use indent_guides::ActiveIndentGuidesState;
   88use inlay_hint_cache::{InlayHintCache, InlaySplice, InvalidationStrategy};
   89pub use inline_completion::Direction;
   90use inline_completion::{InlayProposal, InlineCompletionProvider, InlineCompletionProviderHandle};
   91pub use items::MAX_TAB_TITLE_LEN;
   92use itertools::Itertools;
   93use language::{
   94    language_settings::{self, all_language_settings, language_settings, InlayHintSettings},
   95    markdown, point_from_lsp, AutoindentMode, BracketPair, Buffer, Capability, CharKind, CodeLabel,
   96    CursorShape, Diagnostic, Documentation, IndentKind, IndentSize, Language, OffsetRangeExt,
   97    Point, Selection, SelectionGoal, TransactionId,
   98};
   99use language::{point_to_lsp, BufferRow, CharClassifier, Runnable, RunnableRange};
  100use linked_editing_ranges::refresh_linked_ranges;
  101pub use proposed_changes_editor::{
  102    ProposedChangeLocation, ProposedChangesEditor, ProposedChangesEditorToolbar,
  103};
  104use similar::{ChangeTag, TextDiff};
  105use std::iter::Peekable;
  106use task::{ResolvedTask, TaskTemplate, TaskVariables};
  107
  108use hover_links::{find_file, HoverLink, HoveredLinkState, InlayHighlight};
  109pub use lsp::CompletionContext;
  110use lsp::{
  111    CompletionItemKind, CompletionTriggerKind, DiagnosticSeverity, InsertTextFormat,
  112    LanguageServerId, LanguageServerName,
  113};
  114use mouse_context_menu::MouseContextMenu;
  115use movement::TextLayoutDetails;
  116pub use multi_buffer::{
  117    Anchor, AnchorRangeExt, ExcerptId, ExcerptRange, MultiBuffer, MultiBufferSnapshot, ToOffset,
  118    ToPoint,
  119};
  120use multi_buffer::{
  121    ExpandExcerptDirection, MultiBufferDiffHunk, MultiBufferPoint, MultiBufferRow, ToOffsetUtf16,
  122};
  123use ordered_float::OrderedFloat;
  124use parking_lot::{Mutex, RwLock};
  125use project::{
  126    lsp_store::{FormatTarget, FormatTrigger},
  127    project_settings::{GitGutterSetting, ProjectSettings},
  128    CodeAction, Completion, CompletionIntent, DocumentHighlight, InlayHint, Item, Location,
  129    LocationLink, Project, ProjectTransaction, TaskSourceKind,
  130};
  131use rand::prelude::*;
  132use rpc::{proto::*, ErrorExt};
  133use scroll::{Autoscroll, OngoingScroll, ScrollAnchor, ScrollManager, ScrollbarAutoHide};
  134use selections_collection::{
  135    resolve_selections, MutableSelectionsCollection, SelectionsCollection,
  136};
  137use serde::{Deserialize, Serialize};
  138use settings::{update_settings_file, Settings, SettingsLocation, SettingsStore};
  139use smallvec::SmallVec;
  140use snippet::Snippet;
  141use std::{
  142    any::TypeId,
  143    borrow::Cow,
  144    cell::RefCell,
  145    cmp::{self, Ordering, Reverse},
  146    mem,
  147    num::NonZeroU32,
  148    ops::{ControlFlow, Deref, DerefMut, Not as _, Range, RangeInclusive},
  149    path::{Path, PathBuf},
  150    rc::Rc,
  151    sync::Arc,
  152    time::{Duration, Instant},
  153};
  154pub use sum_tree::Bias;
  155use sum_tree::TreeMap;
  156use text::{BufferId, OffsetUtf16, Rope};
  157use theme::{
  158    observe_buffer_font_size_adjustment, ActiveTheme, PlayerColor, StatusColors, SyntaxTheme,
  159    ThemeColors, ThemeSettings,
  160};
  161use ui::{
  162    h_flex, prelude::*, ButtonSize, ButtonStyle, Disclosure, IconButton, IconName, IconSize,
  163    ListItem, Popover, PopoverMenuHandle, Tooltip,
  164};
  165use util::{defer, maybe, post_inc, RangeExt, ResultExt, TryFutureExt};
  166use workspace::item::{ItemHandle, PreviewTabsSettings};
  167use workspace::notifications::{DetachAndPromptErr, NotificationId, NotifyTaskExt};
  168use workspace::{
  169    searchable::SearchEvent, ItemNavHistory, SplitDirection, ViewId, Workspace, WorkspaceId,
  170};
  171use workspace::{Item as WorkspaceItem, OpenInTerminal, OpenTerminal, TabBarSettings, Toast};
  172
  173use crate::hover_links::find_url;
  174use crate::signature_help::{SignatureHelpHiddenBy, SignatureHelpState};
  175
  176pub const FILE_HEADER_HEIGHT: u32 = 2;
  177pub const MULTI_BUFFER_EXCERPT_HEADER_HEIGHT: u32 = 1;
  178pub const MULTI_BUFFER_EXCERPT_FOOTER_HEIGHT: u32 = 1;
  179pub const DEFAULT_MULTIBUFFER_CONTEXT: u32 = 2;
  180const CURSOR_BLINK_INTERVAL: Duration = Duration::from_millis(500);
  181const MAX_LINE_LEN: usize = 1024;
  182const MIN_NAVIGATION_HISTORY_ROW_DELTA: i64 = 10;
  183const MAX_SELECTION_HISTORY_LEN: usize = 1024;
  184pub(crate) const CURSORS_VISIBLE_FOR: Duration = Duration::from_millis(2000);
  185#[doc(hidden)]
  186pub const CODE_ACTIONS_DEBOUNCE_TIMEOUT: Duration = Duration::from_millis(250);
  187#[doc(hidden)]
  188pub const DOCUMENT_HIGHLIGHTS_DEBOUNCE_TIMEOUT: Duration = Duration::from_millis(75);
  189
  190pub(crate) const FORMAT_TIMEOUT: Duration = Duration::from_secs(2);
  191pub(crate) const SCROLL_CENTER_TOP_BOTTOM_DEBOUNCE_TIMEOUT: Duration = Duration::from_secs(1);
  192
  193pub fn render_parsed_markdown(
  194    element_id: impl Into<ElementId>,
  195    parsed: &language::ParsedMarkdown,
  196    editor_style: &EditorStyle,
  197    workspace: Option<WeakView<Workspace>>,
  198    cx: &mut WindowContext,
  199) -> InteractiveText {
  200    let code_span_background_color = cx
  201        .theme()
  202        .colors()
  203        .editor_document_highlight_read_background;
  204
  205    let highlights = gpui::combine_highlights(
  206        parsed.highlights.iter().filter_map(|(range, highlight)| {
  207            let highlight = highlight.to_highlight_style(&editor_style.syntax)?;
  208            Some((range.clone(), highlight))
  209        }),
  210        parsed
  211            .regions
  212            .iter()
  213            .zip(&parsed.region_ranges)
  214            .filter_map(|(region, range)| {
  215                if region.code {
  216                    Some((
  217                        range.clone(),
  218                        HighlightStyle {
  219                            background_color: Some(code_span_background_color),
  220                            ..Default::default()
  221                        },
  222                    ))
  223                } else {
  224                    None
  225                }
  226            }),
  227    );
  228
  229    let mut links = Vec::new();
  230    let mut link_ranges = Vec::new();
  231    for (range, region) in parsed.region_ranges.iter().zip(&parsed.regions) {
  232        if let Some(link) = region.link.clone() {
  233            links.push(link);
  234            link_ranges.push(range.clone());
  235        }
  236    }
  237
  238    InteractiveText::new(
  239        element_id,
  240        StyledText::new(parsed.text.clone()).with_highlights(&editor_style.text, highlights),
  241    )
  242    .on_click(link_ranges, move |clicked_range_ix, cx| {
  243        match &links[clicked_range_ix] {
  244            markdown::Link::Web { url } => cx.open_url(url),
  245            markdown::Link::Path { path } => {
  246                if let Some(workspace) = &workspace {
  247                    _ = workspace.update(cx, |workspace, cx| {
  248                        workspace.open_abs_path(path.clone(), false, cx).detach();
  249                    });
  250                }
  251            }
  252        }
  253    })
  254}
  255
  256#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
  257pub(crate) enum InlayId {
  258    Suggestion(usize),
  259    Hint(usize),
  260}
  261
  262impl InlayId {
  263    fn id(&self) -> usize {
  264        match self {
  265            Self::Suggestion(id) => *id,
  266            Self::Hint(id) => *id,
  267        }
  268    }
  269}
  270
  271enum DiffRowHighlight {}
  272enum DocumentHighlightRead {}
  273enum DocumentHighlightWrite {}
  274enum InputComposition {}
  275
  276#[derive(Debug, Copy, Clone, PartialEq, Eq)]
  277pub enum Navigated {
  278    Yes,
  279    No,
  280}
  281
  282impl Navigated {
  283    pub fn from_bool(yes: bool) -> Navigated {
  284        if yes {
  285            Navigated::Yes
  286        } else {
  287            Navigated::No
  288        }
  289    }
  290}
  291
  292pub fn init_settings(cx: &mut AppContext) {
  293    EditorSettings::register(cx);
  294}
  295
  296pub fn init(cx: &mut AppContext) {
  297    init_settings(cx);
  298
  299    workspace::register_project_item::<Editor>(cx);
  300    workspace::FollowableViewRegistry::register::<Editor>(cx);
  301    workspace::register_serializable_item::<Editor>(cx);
  302
  303    cx.observe_new_views(
  304        |workspace: &mut Workspace, _cx: &mut ViewContext<Workspace>| {
  305            workspace.register_action(Editor::new_file);
  306            workspace.register_action(Editor::new_file_vertical);
  307            workspace.register_action(Editor::new_file_horizontal);
  308        },
  309    )
  310    .detach();
  311
  312    cx.on_action(move |_: &workspace::NewFile, cx| {
  313        let app_state = workspace::AppState::global(cx);
  314        if let Some(app_state) = app_state.upgrade() {
  315            workspace::open_new(Default::default(), app_state, cx, |workspace, cx| {
  316                Editor::new_file(workspace, &Default::default(), cx)
  317            })
  318            .detach();
  319        }
  320    });
  321    cx.on_action(move |_: &workspace::NewWindow, cx| {
  322        let app_state = workspace::AppState::global(cx);
  323        if let Some(app_state) = app_state.upgrade() {
  324            workspace::open_new(Default::default(), app_state, cx, |workspace, cx| {
  325                Editor::new_file(workspace, &Default::default(), cx)
  326            })
  327            .detach();
  328        }
  329    });
  330}
  331
  332pub struct SearchWithinRange;
  333
  334trait InvalidationRegion {
  335    fn ranges(&self) -> &[Range<Anchor>];
  336}
  337
  338#[derive(Clone, Debug, PartialEq)]
  339pub enum SelectPhase {
  340    Begin {
  341        position: DisplayPoint,
  342        add: bool,
  343        click_count: usize,
  344    },
  345    BeginColumnar {
  346        position: DisplayPoint,
  347        reset: bool,
  348        goal_column: u32,
  349    },
  350    Extend {
  351        position: DisplayPoint,
  352        click_count: usize,
  353    },
  354    Update {
  355        position: DisplayPoint,
  356        goal_column: u32,
  357        scroll_delta: gpui::Point<f32>,
  358    },
  359    End,
  360}
  361
  362#[derive(Clone, Debug)]
  363pub enum SelectMode {
  364    Character,
  365    Word(Range<Anchor>),
  366    Line(Range<Anchor>),
  367    All,
  368}
  369
  370#[derive(Copy, Clone, PartialEq, Eq, Debug)]
  371pub enum EditorMode {
  372    SingleLine { auto_width: bool },
  373    AutoHeight { max_lines: usize },
  374    Full,
  375}
  376
  377#[derive(Copy, Clone, Debug)]
  378pub enum SoftWrap {
  379    /// Prefer not to wrap at all.
  380    ///
  381    /// Note: this is currently internal, as actually limited by [`crate::MAX_LINE_LEN`] until it wraps.
  382    /// The mode is used inside git diff hunks, where it's seems currently more useful to not wrap as much as possible.
  383    GitDiff,
  384    /// Prefer a single line generally, unless an overly long line is encountered.
  385    None,
  386    /// Soft wrap lines that exceed the editor width.
  387    EditorWidth,
  388    /// Soft wrap lines at the preferred line length.
  389    Column(u32),
  390    /// Soft wrap line at the preferred line length or the editor width (whichever is smaller).
  391    Bounded(u32),
  392}
  393
  394#[derive(Clone)]
  395pub struct EditorStyle {
  396    pub background: Hsla,
  397    pub local_player: PlayerColor,
  398    pub text: TextStyle,
  399    pub scrollbar_width: Pixels,
  400    pub syntax: Arc<SyntaxTheme>,
  401    pub status: StatusColors,
  402    pub inlay_hints_style: HighlightStyle,
  403    pub suggestions_style: HighlightStyle,
  404    pub unnecessary_code_fade: f32,
  405}
  406
  407impl Default for EditorStyle {
  408    fn default() -> Self {
  409        Self {
  410            background: Hsla::default(),
  411            local_player: PlayerColor::default(),
  412            text: TextStyle::default(),
  413            scrollbar_width: Pixels::default(),
  414            syntax: Default::default(),
  415            // HACK: Status colors don't have a real default.
  416            // We should look into removing the status colors from the editor
  417            // style and retrieve them directly from the theme.
  418            status: StatusColors::dark(),
  419            inlay_hints_style: HighlightStyle::default(),
  420            suggestions_style: HighlightStyle::default(),
  421            unnecessary_code_fade: Default::default(),
  422        }
  423    }
  424}
  425
  426pub fn make_inlay_hints_style(cx: &WindowContext) -> HighlightStyle {
  427    let show_background = language_settings::language_settings(None, None, cx)
  428        .inlay_hints
  429        .show_background;
  430
  431    HighlightStyle {
  432        color: Some(cx.theme().status().hint),
  433        background_color: show_background.then(|| cx.theme().status().hint_background),
  434        ..HighlightStyle::default()
  435    }
  436}
  437
  438type CompletionId = usize;
  439
  440#[derive(Clone, Debug)]
  441struct CompletionState {
  442    // render_inlay_ids represents the inlay hints that are inserted
  443    // for rendering the inline completions. They may be discontinuous
  444    // in the event that the completion provider returns some intersection
  445    // with the existing content.
  446    render_inlay_ids: Vec<InlayId>,
  447    // text is the resulting rope that is inserted when the user accepts a completion.
  448    text: Rope,
  449    // position is the position of the cursor when the completion was triggered.
  450    position: multi_buffer::Anchor,
  451    // delete_range is the range of text that this completion state covers.
  452    // if the completion is accepted, this range should be deleted.
  453    delete_range: Option<Range<multi_buffer::Anchor>>,
  454}
  455
  456#[derive(Copy, Clone, Eq, PartialEq, PartialOrd, Ord, Debug, Default)]
  457struct EditorActionId(usize);
  458
  459impl EditorActionId {
  460    pub fn post_inc(&mut self) -> Self {
  461        let answer = self.0;
  462
  463        *self = Self(answer + 1);
  464
  465        Self(answer)
  466    }
  467}
  468
  469// type GetFieldEditorTheme = dyn Fn(&theme::Theme) -> theme::FieldEditor;
  470// type OverrideTextStyle = dyn Fn(&EditorStyle) -> Option<HighlightStyle>;
  471
  472type BackgroundHighlight = (fn(&ThemeColors) -> Hsla, Arc<[Range<Anchor>]>);
  473type GutterHighlight = (fn(&AppContext) -> Hsla, Arc<[Range<Anchor>]>);
  474
  475#[derive(Default)]
  476struct ScrollbarMarkerState {
  477    scrollbar_size: Size<Pixels>,
  478    dirty: bool,
  479    markers: Arc<[PaintQuad]>,
  480    pending_refresh: Option<Task<Result<()>>>,
  481}
  482
  483impl ScrollbarMarkerState {
  484    fn should_refresh(&self, scrollbar_size: Size<Pixels>) -> bool {
  485        self.pending_refresh.is_none() && (self.scrollbar_size != scrollbar_size || self.dirty)
  486    }
  487}
  488
  489#[derive(Clone, Debug)]
  490struct RunnableTasks {
  491    templates: Vec<(TaskSourceKind, TaskTemplate)>,
  492    offset: MultiBufferOffset,
  493    // We need the column at which the task context evaluation should take place (when we're spawning it via gutter).
  494    column: u32,
  495    // Values of all named captures, including those starting with '_'
  496    extra_variables: HashMap<String, String>,
  497    // Full range of the tagged region. We use it to determine which `extra_variables` to grab for context resolution in e.g. a modal.
  498    context_range: Range<BufferOffset>,
  499}
  500
  501impl RunnableTasks {
  502    fn resolve<'a>(
  503        &'a self,
  504        cx: &'a task::TaskContext,
  505    ) -> impl Iterator<Item = (TaskSourceKind, ResolvedTask)> + 'a {
  506        self.templates.iter().filter_map(|(kind, template)| {
  507            template
  508                .resolve_task(&kind.to_id_base(), cx)
  509                .map(|task| (kind.clone(), task))
  510        })
  511    }
  512}
  513
  514#[derive(Clone)]
  515struct ResolvedTasks {
  516    templates: SmallVec<[(TaskSourceKind, ResolvedTask); 1]>,
  517    position: Anchor,
  518}
  519#[derive(Copy, Clone, Debug)]
  520struct MultiBufferOffset(usize);
  521#[derive(Copy, Clone, Debug, PartialEq, PartialOrd)]
  522struct BufferOffset(usize);
  523
  524// Addons allow storing per-editor state in other crates (e.g. Vim)
  525pub trait Addon: 'static {
  526    fn extend_key_context(&self, _: &mut KeyContext, _: &AppContext) {}
  527
  528    fn to_any(&self) -> &dyn std::any::Any;
  529}
  530
  531#[derive(Debug, Copy, Clone, PartialEq, Eq)]
  532pub enum IsVimMode {
  533    Yes,
  534    No,
  535}
  536
  537/// Zed's primary text input `View`, allowing users to edit a [`MultiBuffer`]
  538///
  539/// See the [module level documentation](self) for more information.
  540pub struct Editor {
  541    focus_handle: FocusHandle,
  542    last_focused_descendant: Option<WeakFocusHandle>,
  543    /// The text buffer being edited
  544    buffer: Model<MultiBuffer>,
  545    /// Map of how text in the buffer should be displayed.
  546    /// Handles soft wraps, folds, fake inlay text insertions, etc.
  547    pub display_map: Model<DisplayMap>,
  548    pub selections: SelectionsCollection,
  549    pub scroll_manager: ScrollManager,
  550    /// When inline assist editors are linked, they all render cursors because
  551    /// typing enters text into each of them, even the ones that aren't focused.
  552    pub(crate) show_cursor_when_unfocused: bool,
  553    columnar_selection_tail: Option<Anchor>,
  554    add_selections_state: Option<AddSelectionsState>,
  555    select_next_state: Option<SelectNextState>,
  556    select_prev_state: Option<SelectNextState>,
  557    selection_history: SelectionHistory,
  558    autoclose_regions: Vec<AutocloseRegion>,
  559    snippet_stack: InvalidationStack<SnippetState>,
  560    select_larger_syntax_node_stack: Vec<Box<[Selection<usize>]>>,
  561    ime_transaction: Option<TransactionId>,
  562    active_diagnostics: Option<ActiveDiagnosticGroup>,
  563    soft_wrap_mode_override: Option<language_settings::SoftWrap>,
  564
  565    project: Option<Model<Project>>,
  566    semantics_provider: Option<Rc<dyn SemanticsProvider>>,
  567    completion_provider: Option<Box<dyn CompletionProvider>>,
  568    collaboration_hub: Option<Box<dyn CollaborationHub>>,
  569    blink_manager: Model<BlinkManager>,
  570    show_cursor_names: bool,
  571    hovered_cursors: HashMap<HoveredCursor, Task<()>>,
  572    pub show_local_selections: bool,
  573    mode: EditorMode,
  574    show_breadcrumbs: bool,
  575    show_gutter: bool,
  576    show_line_numbers: Option<bool>,
  577    use_relative_line_numbers: Option<bool>,
  578    show_git_diff_gutter: Option<bool>,
  579    show_code_actions: Option<bool>,
  580    show_runnables: Option<bool>,
  581    show_wrap_guides: Option<bool>,
  582    show_indent_guides: Option<bool>,
  583    placeholder_text: Option<Arc<str>>,
  584    highlight_order: usize,
  585    highlighted_rows: HashMap<TypeId, Vec<RowHighlight>>,
  586    background_highlights: TreeMap<TypeId, BackgroundHighlight>,
  587    gutter_highlights: TreeMap<TypeId, GutterHighlight>,
  588    scrollbar_marker_state: ScrollbarMarkerState,
  589    active_indent_guides_state: ActiveIndentGuidesState,
  590    nav_history: Option<ItemNavHistory>,
  591    context_menu: RwLock<Option<ContextMenu>>,
  592    mouse_context_menu: Option<MouseContextMenu>,
  593    hunk_controls_menu_handle: PopoverMenuHandle<ui::ContextMenu>,
  594    completion_tasks: Vec<(CompletionId, Task<Option<()>>)>,
  595    signature_help_state: SignatureHelpState,
  596    auto_signature_help: Option<bool>,
  597    find_all_references_task_sources: Vec<Anchor>,
  598    next_completion_id: CompletionId,
  599    available_code_actions: Option<(Location, Arc<[AvailableCodeAction]>)>,
  600    code_actions_task: Option<Task<Result<()>>>,
  601    document_highlights_task: Option<Task<()>>,
  602    linked_editing_range_task: Option<Task<Option<()>>>,
  603    linked_edit_ranges: linked_editing_ranges::LinkedEditingRanges,
  604    pending_rename: Option<RenameState>,
  605    searchable: bool,
  606    cursor_shape: CursorShape,
  607    current_line_highlight: Option<CurrentLineHighlight>,
  608    collapse_matches: bool,
  609    autoindent_mode: Option<AutoindentMode>,
  610    workspace: Option<(WeakView<Workspace>, Option<WorkspaceId>)>,
  611    input_enabled: bool,
  612    use_modal_editing: bool,
  613    read_only: bool,
  614    leader_peer_id: Option<PeerId>,
  615    remote_id: Option<ViewId>,
  616    hover_state: HoverState,
  617    gutter_hovered: bool,
  618    hovered_link_state: Option<HoveredLinkState>,
  619    inline_completion_provider: Option<RegisteredInlineCompletionProvider>,
  620    code_action_providers: Vec<Arc<dyn CodeActionProvider>>,
  621    active_inline_completion: Option<CompletionState>,
  622    // enable_inline_completions is a switch that Vim can use to disable
  623    // inline completions based on its mode.
  624    enable_inline_completions: bool,
  625    show_inline_completions_override: Option<bool>,
  626    inlay_hint_cache: InlayHintCache,
  627    expanded_hunks: ExpandedHunks,
  628    next_inlay_id: usize,
  629    _subscriptions: Vec<Subscription>,
  630    pixel_position_of_newest_cursor: Option<gpui::Point<Pixels>>,
  631    gutter_dimensions: GutterDimensions,
  632    style: Option<EditorStyle>,
  633    text_style_refinement: Option<TextStyleRefinement>,
  634    next_editor_action_id: EditorActionId,
  635    editor_actions: Rc<RefCell<BTreeMap<EditorActionId, Box<dyn Fn(&mut ViewContext<Self>)>>>>,
  636    use_autoclose: bool,
  637    use_auto_surround: bool,
  638    auto_replace_emoji_shortcode: bool,
  639    show_git_blame_gutter: bool,
  640    show_git_blame_inline: bool,
  641    show_git_blame_inline_delay_task: Option<Task<()>>,
  642    git_blame_inline_enabled: bool,
  643    serialize_dirty_buffers: bool,
  644    show_selection_menu: Option<bool>,
  645    blame: Option<Model<GitBlame>>,
  646    blame_subscription: Option<Subscription>,
  647    custom_context_menu: Option<
  648        Box<
  649            dyn 'static
  650                + Fn(&mut Self, DisplayPoint, &mut ViewContext<Self>) -> Option<View<ui::ContextMenu>>,
  651        >,
  652    >,
  653    last_bounds: Option<Bounds<Pixels>>,
  654    expect_bounds_change: Option<Bounds<Pixels>>,
  655    tasks: BTreeMap<(BufferId, BufferRow), RunnableTasks>,
  656    tasks_update_task: Option<Task<()>>,
  657    previous_search_ranges: Option<Arc<[Range<Anchor>]>>,
  658    breadcrumb_header: Option<String>,
  659    focused_block: Option<FocusedBlock>,
  660    next_scroll_position: NextScrollCursorCenterTopBottom,
  661    addons: HashMap<TypeId, Box<dyn Addon>>,
  662    _scroll_cursor_center_top_bottom_task: Task<()>,
  663}
  664
  665#[derive(Copy, Clone, Debug, PartialEq, Eq, Default)]
  666enum NextScrollCursorCenterTopBottom {
  667    #[default]
  668    Center,
  669    Top,
  670    Bottom,
  671}
  672
  673impl NextScrollCursorCenterTopBottom {
  674    fn next(&self) -> Self {
  675        match self {
  676            Self::Center => Self::Top,
  677            Self::Top => Self::Bottom,
  678            Self::Bottom => Self::Center,
  679        }
  680    }
  681}
  682
  683#[derive(Clone)]
  684pub struct EditorSnapshot {
  685    pub mode: EditorMode,
  686    show_gutter: bool,
  687    show_line_numbers: Option<bool>,
  688    show_git_diff_gutter: Option<bool>,
  689    show_code_actions: Option<bool>,
  690    show_runnables: Option<bool>,
  691    git_blame_gutter_max_author_length: Option<usize>,
  692    pub display_snapshot: DisplaySnapshot,
  693    pub placeholder_text: Option<Arc<str>>,
  694    is_focused: bool,
  695    scroll_anchor: ScrollAnchor,
  696    ongoing_scroll: OngoingScroll,
  697    current_line_highlight: CurrentLineHighlight,
  698    gutter_hovered: bool,
  699}
  700
  701const GIT_BLAME_MAX_AUTHOR_CHARS_DISPLAYED: usize = 20;
  702
  703#[derive(Default, Debug, Clone, Copy)]
  704pub struct GutterDimensions {
  705    pub left_padding: Pixels,
  706    pub right_padding: Pixels,
  707    pub width: Pixels,
  708    pub margin: Pixels,
  709    pub git_blame_entries_width: Option<Pixels>,
  710}
  711
  712impl GutterDimensions {
  713    /// The full width of the space taken up by the gutter.
  714    pub fn full_width(&self) -> Pixels {
  715        self.margin + self.width
  716    }
  717
  718    /// The width of the space reserved for the fold indicators,
  719    /// use alongside 'justify_end' and `gutter_width` to
  720    /// right align content with the line numbers
  721    pub fn fold_area_width(&self) -> Pixels {
  722        self.margin + self.right_padding
  723    }
  724}
  725
  726#[derive(Debug)]
  727pub struct RemoteSelection {
  728    pub replica_id: ReplicaId,
  729    pub selection: Selection<Anchor>,
  730    pub cursor_shape: CursorShape,
  731    pub peer_id: PeerId,
  732    pub line_mode: bool,
  733    pub participant_index: Option<ParticipantIndex>,
  734    pub user_name: Option<SharedString>,
  735}
  736
  737#[derive(Clone, Debug)]
  738struct SelectionHistoryEntry {
  739    selections: Arc<[Selection<Anchor>]>,
  740    select_next_state: Option<SelectNextState>,
  741    select_prev_state: Option<SelectNextState>,
  742    add_selections_state: Option<AddSelectionsState>,
  743}
  744
  745enum SelectionHistoryMode {
  746    Normal,
  747    Undoing,
  748    Redoing,
  749}
  750
  751#[derive(Clone, PartialEq, Eq, Hash)]
  752struct HoveredCursor {
  753    replica_id: u16,
  754    selection_id: usize,
  755}
  756
  757impl Default for SelectionHistoryMode {
  758    fn default() -> Self {
  759        Self::Normal
  760    }
  761}
  762
  763#[derive(Default)]
  764struct SelectionHistory {
  765    #[allow(clippy::type_complexity)]
  766    selections_by_transaction:
  767        HashMap<TransactionId, (Arc<[Selection<Anchor>]>, Option<Arc<[Selection<Anchor>]>>)>,
  768    mode: SelectionHistoryMode,
  769    undo_stack: VecDeque<SelectionHistoryEntry>,
  770    redo_stack: VecDeque<SelectionHistoryEntry>,
  771}
  772
  773impl SelectionHistory {
  774    fn insert_transaction(
  775        &mut self,
  776        transaction_id: TransactionId,
  777        selections: Arc<[Selection<Anchor>]>,
  778    ) {
  779        self.selections_by_transaction
  780            .insert(transaction_id, (selections, None));
  781    }
  782
  783    #[allow(clippy::type_complexity)]
  784    fn transaction(
  785        &self,
  786        transaction_id: TransactionId,
  787    ) -> Option<&(Arc<[Selection<Anchor>]>, Option<Arc<[Selection<Anchor>]>>)> {
  788        self.selections_by_transaction.get(&transaction_id)
  789    }
  790
  791    #[allow(clippy::type_complexity)]
  792    fn transaction_mut(
  793        &mut self,
  794        transaction_id: TransactionId,
  795    ) -> Option<&mut (Arc<[Selection<Anchor>]>, Option<Arc<[Selection<Anchor>]>>)> {
  796        self.selections_by_transaction.get_mut(&transaction_id)
  797    }
  798
  799    fn push(&mut self, entry: SelectionHistoryEntry) {
  800        if !entry.selections.is_empty() {
  801            match self.mode {
  802                SelectionHistoryMode::Normal => {
  803                    self.push_undo(entry);
  804                    self.redo_stack.clear();
  805                }
  806                SelectionHistoryMode::Undoing => self.push_redo(entry),
  807                SelectionHistoryMode::Redoing => self.push_undo(entry),
  808            }
  809        }
  810    }
  811
  812    fn push_undo(&mut self, entry: SelectionHistoryEntry) {
  813        if self
  814            .undo_stack
  815            .back()
  816            .map_or(true, |e| e.selections != entry.selections)
  817        {
  818            self.undo_stack.push_back(entry);
  819            if self.undo_stack.len() > MAX_SELECTION_HISTORY_LEN {
  820                self.undo_stack.pop_front();
  821            }
  822        }
  823    }
  824
  825    fn push_redo(&mut self, entry: SelectionHistoryEntry) {
  826        if self
  827            .redo_stack
  828            .back()
  829            .map_or(true, |e| e.selections != entry.selections)
  830        {
  831            self.redo_stack.push_back(entry);
  832            if self.redo_stack.len() > MAX_SELECTION_HISTORY_LEN {
  833                self.redo_stack.pop_front();
  834            }
  835        }
  836    }
  837}
  838
  839struct RowHighlight {
  840    index: usize,
  841    range: Range<Anchor>,
  842    color: Hsla,
  843    should_autoscroll: bool,
  844}
  845
  846#[derive(Clone, Debug)]
  847struct AddSelectionsState {
  848    above: bool,
  849    stack: Vec<usize>,
  850}
  851
  852#[derive(Clone)]
  853struct SelectNextState {
  854    query: AhoCorasick,
  855    wordwise: bool,
  856    done: bool,
  857}
  858
  859impl std::fmt::Debug for SelectNextState {
  860    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
  861        f.debug_struct(std::any::type_name::<Self>())
  862            .field("wordwise", &self.wordwise)
  863            .field("done", &self.done)
  864            .finish()
  865    }
  866}
  867
  868#[derive(Debug)]
  869struct AutocloseRegion {
  870    selection_id: usize,
  871    range: Range<Anchor>,
  872    pair: BracketPair,
  873}
  874
  875#[derive(Debug)]
  876struct SnippetState {
  877    ranges: Vec<Vec<Range<Anchor>>>,
  878    active_index: usize,
  879    choices: Vec<Option<Vec<String>>>,
  880}
  881
  882#[doc(hidden)]
  883pub struct RenameState {
  884    pub range: Range<Anchor>,
  885    pub old_name: Arc<str>,
  886    pub editor: View<Editor>,
  887    block_id: CustomBlockId,
  888}
  889
  890struct InvalidationStack<T>(Vec<T>);
  891
  892struct RegisteredInlineCompletionProvider {
  893    provider: Arc<dyn InlineCompletionProviderHandle>,
  894    _subscription: Subscription,
  895}
  896
  897enum ContextMenu {
  898    Completions(CompletionsMenu),
  899    CodeActions(CodeActionsMenu),
  900}
  901
  902impl ContextMenu {
  903    fn select_first(
  904        &mut self,
  905        provider: Option<&dyn CompletionProvider>,
  906        cx: &mut ViewContext<Editor>,
  907    ) -> bool {
  908        if self.visible() {
  909            match self {
  910                ContextMenu::Completions(menu) => menu.select_first(provider, cx),
  911                ContextMenu::CodeActions(menu) => menu.select_first(cx),
  912            }
  913            true
  914        } else {
  915            false
  916        }
  917    }
  918
  919    fn select_prev(
  920        &mut self,
  921        provider: Option<&dyn CompletionProvider>,
  922        cx: &mut ViewContext<Editor>,
  923    ) -> bool {
  924        if self.visible() {
  925            match self {
  926                ContextMenu::Completions(menu) => menu.select_prev(provider, cx),
  927                ContextMenu::CodeActions(menu) => menu.select_prev(cx),
  928            }
  929            true
  930        } else {
  931            false
  932        }
  933    }
  934
  935    fn select_next(
  936        &mut self,
  937        provider: Option<&dyn CompletionProvider>,
  938        cx: &mut ViewContext<Editor>,
  939    ) -> bool {
  940        if self.visible() {
  941            match self {
  942                ContextMenu::Completions(menu) => menu.select_next(provider, cx),
  943                ContextMenu::CodeActions(menu) => menu.select_next(cx),
  944            }
  945            true
  946        } else {
  947            false
  948        }
  949    }
  950
  951    fn select_last(
  952        &mut self,
  953        provider: Option<&dyn CompletionProvider>,
  954        cx: &mut ViewContext<Editor>,
  955    ) -> bool {
  956        if self.visible() {
  957            match self {
  958                ContextMenu::Completions(menu) => menu.select_last(provider, cx),
  959                ContextMenu::CodeActions(menu) => menu.select_last(cx),
  960            }
  961            true
  962        } else {
  963            false
  964        }
  965    }
  966
  967    fn visible(&self) -> bool {
  968        match self {
  969            ContextMenu::Completions(menu) => menu.visible(),
  970            ContextMenu::CodeActions(menu) => menu.visible(),
  971        }
  972    }
  973
  974    fn render(
  975        &self,
  976        cursor_position: DisplayPoint,
  977        style: &EditorStyle,
  978        max_height: Pixels,
  979        workspace: Option<WeakView<Workspace>>,
  980        cx: &mut ViewContext<Editor>,
  981    ) -> (ContextMenuOrigin, AnyElement) {
  982        match self {
  983            ContextMenu::Completions(menu) => (
  984                ContextMenuOrigin::EditorPoint(cursor_position),
  985                menu.render(style, max_height, workspace, cx),
  986            ),
  987            ContextMenu::CodeActions(menu) => menu.render(cursor_position, style, max_height, cx),
  988        }
  989    }
  990}
  991
  992enum ContextMenuOrigin {
  993    EditorPoint(DisplayPoint),
  994    GutterIndicator(DisplayRow),
  995}
  996
  997#[derive(Clone, Debug)]
  998struct CompletionsMenu {
  999    id: CompletionId,
 1000    sort_completions: bool,
 1001    initial_position: Anchor,
 1002    buffer: Model<Buffer>,
 1003    completions: Arc<RwLock<Box<[Completion]>>>,
 1004    match_candidates: Arc<[StringMatchCandidate]>,
 1005    matches: Arc<[StringMatch]>,
 1006    selected_item: usize,
 1007    scroll_handle: UniformListScrollHandle,
 1008    selected_completion_resolve_debounce: Option<Arc<Mutex<DebouncedDelay>>>,
 1009}
 1010
 1011impl CompletionsMenu {
 1012    fn new(
 1013        id: CompletionId,
 1014        sort_completions: bool,
 1015        initial_position: Anchor,
 1016        buffer: Model<Buffer>,
 1017        completions: Box<[Completion]>,
 1018    ) -> Self {
 1019        let match_candidates = completions
 1020            .iter()
 1021            .enumerate()
 1022            .map(|(id, completion)| {
 1023                StringMatchCandidate::new(
 1024                    id,
 1025                    completion.label.text[completion.label.filter_range.clone()].into(),
 1026                )
 1027            })
 1028            .collect();
 1029
 1030        Self {
 1031            id,
 1032            sort_completions,
 1033            initial_position,
 1034            buffer,
 1035            completions: Arc::new(RwLock::new(completions)),
 1036            match_candidates,
 1037            matches: Vec::new().into(),
 1038            selected_item: 0,
 1039            scroll_handle: UniformListScrollHandle::new(),
 1040            selected_completion_resolve_debounce: Some(Arc::new(Mutex::new(DebouncedDelay::new()))),
 1041        }
 1042    }
 1043
 1044    fn new_snippet_choices(
 1045        id: CompletionId,
 1046        sort_completions: bool,
 1047        choices: &Vec<String>,
 1048        selection: Range<Anchor>,
 1049        buffer: Model<Buffer>,
 1050    ) -> Self {
 1051        let completions = choices
 1052            .iter()
 1053            .map(|choice| Completion {
 1054                old_range: selection.start.text_anchor..selection.end.text_anchor,
 1055                new_text: choice.to_string(),
 1056                label: CodeLabel {
 1057                    text: choice.to_string(),
 1058                    runs: Default::default(),
 1059                    filter_range: Default::default(),
 1060                },
 1061                server_id: LanguageServerId(usize::MAX),
 1062                documentation: None,
 1063                lsp_completion: Default::default(),
 1064                confirm: None,
 1065            })
 1066            .collect();
 1067
 1068        let match_candidates = choices
 1069            .iter()
 1070            .enumerate()
 1071            .map(|(id, completion)| StringMatchCandidate::new(id, completion.to_string()))
 1072            .collect();
 1073        let matches = choices
 1074            .iter()
 1075            .enumerate()
 1076            .map(|(id, completion)| StringMatch {
 1077                candidate_id: id,
 1078                score: 1.,
 1079                positions: vec![],
 1080                string: completion.clone(),
 1081            })
 1082            .collect();
 1083        Self {
 1084            id,
 1085            sort_completions,
 1086            initial_position: selection.start,
 1087            buffer,
 1088            completions: Arc::new(RwLock::new(completions)),
 1089            match_candidates,
 1090            matches,
 1091            selected_item: 0,
 1092            scroll_handle: UniformListScrollHandle::new(),
 1093            selected_completion_resolve_debounce: Some(Arc::new(Mutex::new(DebouncedDelay::new()))),
 1094        }
 1095    }
 1096
 1097    fn suppress_documentation_resolution(mut self) -> Self {
 1098        self.selected_completion_resolve_debounce.take();
 1099        self
 1100    }
 1101
 1102    fn select_first(
 1103        &mut self,
 1104        provider: Option<&dyn CompletionProvider>,
 1105        cx: &mut ViewContext<Editor>,
 1106    ) {
 1107        self.selected_item = 0;
 1108        self.scroll_handle
 1109            .scroll_to_item(self.selected_item, ScrollStrategy::Top);
 1110        self.resolve_selected_completion(provider, cx);
 1111        cx.notify();
 1112    }
 1113
 1114    fn select_prev(
 1115        &mut self,
 1116        provider: Option<&dyn CompletionProvider>,
 1117        cx: &mut ViewContext<Editor>,
 1118    ) {
 1119        if self.selected_item > 0 {
 1120            self.selected_item -= 1;
 1121        } else {
 1122            self.selected_item = self.matches.len() - 1;
 1123        }
 1124        self.scroll_handle
 1125            .scroll_to_item(self.selected_item, ScrollStrategy::Top);
 1126        self.resolve_selected_completion(provider, cx);
 1127        cx.notify();
 1128    }
 1129
 1130    fn select_next(
 1131        &mut self,
 1132        provider: Option<&dyn CompletionProvider>,
 1133        cx: &mut ViewContext<Editor>,
 1134    ) {
 1135        if self.selected_item + 1 < self.matches.len() {
 1136            self.selected_item += 1;
 1137        } else {
 1138            self.selected_item = 0;
 1139        }
 1140        self.scroll_handle
 1141            .scroll_to_item(self.selected_item, ScrollStrategy::Top);
 1142        self.resolve_selected_completion(provider, cx);
 1143        cx.notify();
 1144    }
 1145
 1146    fn select_last(
 1147        &mut self,
 1148        provider: Option<&dyn CompletionProvider>,
 1149        cx: &mut ViewContext<Editor>,
 1150    ) {
 1151        self.selected_item = self.matches.len() - 1;
 1152        self.scroll_handle
 1153            .scroll_to_item(self.selected_item, ScrollStrategy::Top);
 1154        self.resolve_selected_completion(provider, cx);
 1155        cx.notify();
 1156    }
 1157
 1158    fn resolve_selected_completion(
 1159        &mut self,
 1160        provider: Option<&dyn CompletionProvider>,
 1161        cx: &mut ViewContext<Editor>,
 1162    ) {
 1163        let completion_index = self.matches[self.selected_item].candidate_id;
 1164        let Some(provider) = provider else {
 1165            return;
 1166        };
 1167        let Some(completion_resolve) = self.selected_completion_resolve_debounce.as_ref() else {
 1168            return;
 1169        };
 1170
 1171        let resolve_task = provider.resolve_completions(
 1172            self.buffer.clone(),
 1173            vec![completion_index],
 1174            self.completions.clone(),
 1175            cx,
 1176        );
 1177
 1178        let delay_ms =
 1179            EditorSettings::get_global(cx).completion_documentation_secondary_query_debounce;
 1180        let delay = Duration::from_millis(delay_ms);
 1181
 1182        completion_resolve.lock().fire_new(delay, cx, |_, cx| {
 1183            cx.spawn(move |this, mut cx| async move {
 1184                if let Some(true) = resolve_task.await.log_err() {
 1185                    this.update(&mut cx, |_, cx| cx.notify()).ok();
 1186                }
 1187            })
 1188        });
 1189    }
 1190
 1191    fn visible(&self) -> bool {
 1192        !self.matches.is_empty()
 1193    }
 1194
 1195    fn render(
 1196        &self,
 1197        style: &EditorStyle,
 1198        max_height: Pixels,
 1199        workspace: Option<WeakView<Workspace>>,
 1200        cx: &mut ViewContext<Editor>,
 1201    ) -> AnyElement {
 1202        let settings = EditorSettings::get_global(cx);
 1203        let show_completion_documentation = settings.show_completion_documentation;
 1204
 1205        let widest_completion_ix = self
 1206            .matches
 1207            .iter()
 1208            .enumerate()
 1209            .max_by_key(|(_, mat)| {
 1210                let completions = self.completions.read();
 1211                let completion = &completions[mat.candidate_id];
 1212                let documentation = &completion.documentation;
 1213
 1214                let mut len = completion.label.text.chars().count();
 1215                if let Some(Documentation::SingleLine(text)) = documentation {
 1216                    if show_completion_documentation {
 1217                        len += text.chars().count();
 1218                    }
 1219                }
 1220
 1221                len
 1222            })
 1223            .map(|(ix, _)| ix);
 1224
 1225        let completions = self.completions.clone();
 1226        let matches = self.matches.clone();
 1227        let selected_item = self.selected_item;
 1228        let style = style.clone();
 1229
 1230        let multiline_docs = if show_completion_documentation {
 1231            let mat = &self.matches[selected_item];
 1232            let multiline_docs = match &self.completions.read()[mat.candidate_id].documentation {
 1233                Some(Documentation::MultiLinePlainText(text)) => {
 1234                    Some(div().child(SharedString::from(text.clone())))
 1235                }
 1236                Some(Documentation::MultiLineMarkdown(parsed)) if !parsed.text.is_empty() => {
 1237                    Some(div().child(render_parsed_markdown(
 1238                        "completions_markdown",
 1239                        parsed,
 1240                        &style,
 1241                        workspace,
 1242                        cx,
 1243                    )))
 1244                }
 1245                _ => None,
 1246            };
 1247            multiline_docs.map(|div| {
 1248                div.id("multiline_docs")
 1249                    .max_h(max_height)
 1250                    .flex_1()
 1251                    .px_1p5()
 1252                    .py_1()
 1253                    .min_w(px(260.))
 1254                    .max_w(px(640.))
 1255                    .w(px(500.))
 1256                    .overflow_y_scroll()
 1257                    .occlude()
 1258            })
 1259        } else {
 1260            None
 1261        };
 1262
 1263        let list = uniform_list(
 1264            cx.view().clone(),
 1265            "completions",
 1266            matches.len(),
 1267            move |_editor, range, cx| {
 1268                let start_ix = range.start;
 1269                let completions_guard = completions.read();
 1270
 1271                matches[range]
 1272                    .iter()
 1273                    .enumerate()
 1274                    .map(|(ix, mat)| {
 1275                        let item_ix = start_ix + ix;
 1276                        let candidate_id = mat.candidate_id;
 1277                        let completion = &completions_guard[candidate_id];
 1278
 1279                        let documentation = if show_completion_documentation {
 1280                            &completion.documentation
 1281                        } else {
 1282                            &None
 1283                        };
 1284
 1285                        let highlights = gpui::combine_highlights(
 1286                            mat.ranges().map(|range| (range, FontWeight::BOLD.into())),
 1287                            styled_runs_for_code_label(&completion.label, &style.syntax).map(
 1288                                |(range, mut highlight)| {
 1289                                    // Ignore font weight for syntax highlighting, as we'll use it
 1290                                    // for fuzzy matches.
 1291                                    highlight.font_weight = None;
 1292
 1293                                    if completion.lsp_completion.deprecated.unwrap_or(false) {
 1294                                        highlight.strikethrough = Some(StrikethroughStyle {
 1295                                            thickness: 1.0.into(),
 1296                                            ..Default::default()
 1297                                        });
 1298                                        highlight.color = Some(cx.theme().colors().text_muted);
 1299                                    }
 1300
 1301                                    (range, highlight)
 1302                                },
 1303                            ),
 1304                        );
 1305                        let completion_label = StyledText::new(completion.label.text.clone())
 1306                            .with_highlights(&style.text, highlights);
 1307                        let documentation_label =
 1308                            if let Some(Documentation::SingleLine(text)) = documentation {
 1309                                if text.trim().is_empty() {
 1310                                    None
 1311                                } else {
 1312                                    Some(
 1313                                        Label::new(text.clone())
 1314                                            .ml_4()
 1315                                            .size(LabelSize::Small)
 1316                                            .color(Color::Muted),
 1317                                    )
 1318                                }
 1319                            } else {
 1320                                None
 1321                            };
 1322
 1323                        let color_swatch = completion
 1324                            .color()
 1325                            .map(|color| div().size_4().bg(color).rounded_sm());
 1326
 1327                        div().min_w(px(220.)).max_w(px(540.)).child(
 1328                            ListItem::new(mat.candidate_id)
 1329                                .inset(true)
 1330                                .selected(item_ix == selected_item)
 1331                                .on_click(cx.listener(move |editor, _event, cx| {
 1332                                    cx.stop_propagation();
 1333                                    if let Some(task) = editor.confirm_completion(
 1334                                        &ConfirmCompletion {
 1335                                            item_ix: Some(item_ix),
 1336                                        },
 1337                                        cx,
 1338                                    ) {
 1339                                        task.detach_and_log_err(cx)
 1340                                    }
 1341                                }))
 1342                                .start_slot::<Div>(color_swatch)
 1343                                .child(h_flex().overflow_hidden().child(completion_label))
 1344                                .end_slot::<Label>(documentation_label),
 1345                        )
 1346                    })
 1347                    .collect()
 1348            },
 1349        )
 1350        .occlude()
 1351        .max_h(max_height)
 1352        .track_scroll(self.scroll_handle.clone())
 1353        .with_width_from_item(widest_completion_ix)
 1354        .with_sizing_behavior(ListSizingBehavior::Infer);
 1355
 1356        Popover::new()
 1357            .child(list)
 1358            .when_some(multiline_docs, |popover, multiline_docs| {
 1359                popover.aside(multiline_docs)
 1360            })
 1361            .into_any_element()
 1362    }
 1363
 1364    pub async fn filter(&mut self, query: Option<&str>, executor: BackgroundExecutor) {
 1365        let mut matches = if let Some(query) = query {
 1366            fuzzy::match_strings(
 1367                &self.match_candidates,
 1368                query,
 1369                query.chars().any(|c| c.is_uppercase()),
 1370                100,
 1371                &Default::default(),
 1372                executor,
 1373            )
 1374            .await
 1375        } else {
 1376            self.match_candidates
 1377                .iter()
 1378                .enumerate()
 1379                .map(|(candidate_id, candidate)| StringMatch {
 1380                    candidate_id,
 1381                    score: Default::default(),
 1382                    positions: Default::default(),
 1383                    string: candidate.string.clone(),
 1384                })
 1385                .collect()
 1386        };
 1387
 1388        // Remove all candidates where the query's start does not match the start of any word in the candidate
 1389        if let Some(query) = query {
 1390            if let Some(query_start) = query.chars().next() {
 1391                matches.retain(|string_match| {
 1392                    split_words(&string_match.string).any(|word| {
 1393                        // Check that the first codepoint of the word as lowercase matches the first
 1394                        // codepoint of the query as lowercase
 1395                        word.chars()
 1396                            .flat_map(|codepoint| codepoint.to_lowercase())
 1397                            .zip(query_start.to_lowercase())
 1398                            .all(|(word_cp, query_cp)| word_cp == query_cp)
 1399                    })
 1400                });
 1401            }
 1402        }
 1403
 1404        let completions = self.completions.read();
 1405        if self.sort_completions {
 1406            matches.sort_unstable_by_key(|mat| {
 1407                // We do want to strike a balance here between what the language server tells us
 1408                // to sort by (the sort_text) and what are "obvious" good matches (i.e. when you type
 1409                // `Creat` and there is a local variable called `CreateComponent`).
 1410                // So what we do is: we bucket all matches into two buckets
 1411                // - Strong matches
 1412                // - Weak matches
 1413                // Strong matches are the ones with a high fuzzy-matcher score (the "obvious" matches)
 1414                // and the Weak matches are the rest.
 1415                //
 1416                // For the strong matches, we sort by our fuzzy-finder score first and for the weak
 1417                // matches, we prefer language-server sort_text first.
 1418                //
 1419                // The thinking behind that: we want to show strong matches first in order of relevance(fuzzy score).
 1420                // Rest of the matches(weak) can be sorted as language-server expects.
 1421
 1422                #[derive(PartialEq, Eq, PartialOrd, Ord)]
 1423                enum MatchScore<'a> {
 1424                    Strong {
 1425                        score: Reverse<OrderedFloat<f64>>,
 1426                        sort_text: Option<&'a str>,
 1427                        sort_key: (usize, &'a str),
 1428                    },
 1429                    Weak {
 1430                        sort_text: Option<&'a str>,
 1431                        score: Reverse<OrderedFloat<f64>>,
 1432                        sort_key: (usize, &'a str),
 1433                    },
 1434                }
 1435
 1436                let completion = &completions[mat.candidate_id];
 1437                let sort_key = completion.sort_key();
 1438                let sort_text = completion.lsp_completion.sort_text.as_deref();
 1439                let score = Reverse(OrderedFloat(mat.score));
 1440
 1441                if mat.score >= 0.2 {
 1442                    MatchScore::Strong {
 1443                        score,
 1444                        sort_text,
 1445                        sort_key,
 1446                    }
 1447                } else {
 1448                    MatchScore::Weak {
 1449                        sort_text,
 1450                        score,
 1451                        sort_key,
 1452                    }
 1453                }
 1454            });
 1455        }
 1456
 1457        for mat in &mut matches {
 1458            let completion = &completions[mat.candidate_id];
 1459            mat.string.clone_from(&completion.label.text);
 1460            for position in &mut mat.positions {
 1461                *position += completion.label.filter_range.start;
 1462            }
 1463        }
 1464        drop(completions);
 1465
 1466        self.matches = matches.into();
 1467        self.selected_item = 0;
 1468    }
 1469}
 1470
 1471#[derive(Clone)]
 1472struct AvailableCodeAction {
 1473    excerpt_id: ExcerptId,
 1474    action: CodeAction,
 1475    provider: Arc<dyn CodeActionProvider>,
 1476}
 1477
 1478#[derive(Clone)]
 1479struct CodeActionContents {
 1480    tasks: Option<Arc<ResolvedTasks>>,
 1481    actions: Option<Arc<[AvailableCodeAction]>>,
 1482}
 1483
 1484impl CodeActionContents {
 1485    fn len(&self) -> usize {
 1486        match (&self.tasks, &self.actions) {
 1487            (Some(tasks), Some(actions)) => actions.len() + tasks.templates.len(),
 1488            (Some(tasks), None) => tasks.templates.len(),
 1489            (None, Some(actions)) => actions.len(),
 1490            (None, None) => 0,
 1491        }
 1492    }
 1493
 1494    fn is_empty(&self) -> bool {
 1495        match (&self.tasks, &self.actions) {
 1496            (Some(tasks), Some(actions)) => actions.is_empty() && tasks.templates.is_empty(),
 1497            (Some(tasks), None) => tasks.templates.is_empty(),
 1498            (None, Some(actions)) => actions.is_empty(),
 1499            (None, None) => true,
 1500        }
 1501    }
 1502
 1503    fn iter(&self) -> impl Iterator<Item = CodeActionsItem> + '_ {
 1504        self.tasks
 1505            .iter()
 1506            .flat_map(|tasks| {
 1507                tasks
 1508                    .templates
 1509                    .iter()
 1510                    .map(|(kind, task)| CodeActionsItem::Task(kind.clone(), task.clone()))
 1511            })
 1512            .chain(self.actions.iter().flat_map(|actions| {
 1513                actions.iter().map(|available| CodeActionsItem::CodeAction {
 1514                    excerpt_id: available.excerpt_id,
 1515                    action: available.action.clone(),
 1516                    provider: available.provider.clone(),
 1517                })
 1518            }))
 1519    }
 1520    fn get(&self, index: usize) -> Option<CodeActionsItem> {
 1521        match (&self.tasks, &self.actions) {
 1522            (Some(tasks), Some(actions)) => {
 1523                if index < tasks.templates.len() {
 1524                    tasks
 1525                        .templates
 1526                        .get(index)
 1527                        .cloned()
 1528                        .map(|(kind, task)| CodeActionsItem::Task(kind, task))
 1529                } else {
 1530                    actions.get(index - tasks.templates.len()).map(|available| {
 1531                        CodeActionsItem::CodeAction {
 1532                            excerpt_id: available.excerpt_id,
 1533                            action: available.action.clone(),
 1534                            provider: available.provider.clone(),
 1535                        }
 1536                    })
 1537                }
 1538            }
 1539            (Some(tasks), None) => tasks
 1540                .templates
 1541                .get(index)
 1542                .cloned()
 1543                .map(|(kind, task)| CodeActionsItem::Task(kind, task)),
 1544            (None, Some(actions)) => {
 1545                actions
 1546                    .get(index)
 1547                    .map(|available| CodeActionsItem::CodeAction {
 1548                        excerpt_id: available.excerpt_id,
 1549                        action: available.action.clone(),
 1550                        provider: available.provider.clone(),
 1551                    })
 1552            }
 1553            (None, None) => None,
 1554        }
 1555    }
 1556}
 1557
 1558#[allow(clippy::large_enum_variant)]
 1559#[derive(Clone)]
 1560enum CodeActionsItem {
 1561    Task(TaskSourceKind, ResolvedTask),
 1562    CodeAction {
 1563        excerpt_id: ExcerptId,
 1564        action: CodeAction,
 1565        provider: Arc<dyn CodeActionProvider>,
 1566    },
 1567}
 1568
 1569impl CodeActionsItem {
 1570    fn as_task(&self) -> Option<&ResolvedTask> {
 1571        let Self::Task(_, task) = self else {
 1572            return None;
 1573        };
 1574        Some(task)
 1575    }
 1576    fn as_code_action(&self) -> Option<&CodeAction> {
 1577        let Self::CodeAction { action, .. } = self else {
 1578            return None;
 1579        };
 1580        Some(action)
 1581    }
 1582    fn label(&self) -> String {
 1583        match self {
 1584            Self::CodeAction { action, .. } => action.lsp_action.title.clone(),
 1585            Self::Task(_, task) => task.resolved_label.clone(),
 1586        }
 1587    }
 1588}
 1589
 1590struct CodeActionsMenu {
 1591    actions: CodeActionContents,
 1592    buffer: Model<Buffer>,
 1593    selected_item: usize,
 1594    scroll_handle: UniformListScrollHandle,
 1595    deployed_from_indicator: Option<DisplayRow>,
 1596}
 1597
 1598impl CodeActionsMenu {
 1599    fn select_first(&mut self, cx: &mut ViewContext<Editor>) {
 1600        self.selected_item = 0;
 1601        self.scroll_handle
 1602            .scroll_to_item(self.selected_item, ScrollStrategy::Top);
 1603        cx.notify()
 1604    }
 1605
 1606    fn select_prev(&mut self, cx: &mut ViewContext<Editor>) {
 1607        if self.selected_item > 0 {
 1608            self.selected_item -= 1;
 1609        } else {
 1610            self.selected_item = self.actions.len() - 1;
 1611        }
 1612        self.scroll_handle
 1613            .scroll_to_item(self.selected_item, ScrollStrategy::Top);
 1614        cx.notify();
 1615    }
 1616
 1617    fn select_next(&mut self, cx: &mut ViewContext<Editor>) {
 1618        if self.selected_item + 1 < self.actions.len() {
 1619            self.selected_item += 1;
 1620        } else {
 1621            self.selected_item = 0;
 1622        }
 1623        self.scroll_handle
 1624            .scroll_to_item(self.selected_item, ScrollStrategy::Top);
 1625        cx.notify();
 1626    }
 1627
 1628    fn select_last(&mut self, cx: &mut ViewContext<Editor>) {
 1629        self.selected_item = self.actions.len() - 1;
 1630        self.scroll_handle
 1631            .scroll_to_item(self.selected_item, ScrollStrategy::Top);
 1632        cx.notify()
 1633    }
 1634
 1635    fn visible(&self) -> bool {
 1636        !self.actions.is_empty()
 1637    }
 1638
 1639    fn render(
 1640        &self,
 1641        cursor_position: DisplayPoint,
 1642        _style: &EditorStyle,
 1643        max_height: Pixels,
 1644        cx: &mut ViewContext<Editor>,
 1645    ) -> (ContextMenuOrigin, AnyElement) {
 1646        let actions = self.actions.clone();
 1647        let selected_item = self.selected_item;
 1648        let element = uniform_list(
 1649            cx.view().clone(),
 1650            "code_actions_menu",
 1651            self.actions.len(),
 1652            move |_this, range, cx| {
 1653                actions
 1654                    .iter()
 1655                    .skip(range.start)
 1656                    .take(range.end - range.start)
 1657                    .enumerate()
 1658                    .map(|(ix, action)| {
 1659                        let item_ix = range.start + ix;
 1660                        let selected = selected_item == item_ix;
 1661                        let colors = cx.theme().colors();
 1662                        div()
 1663                            .px_1()
 1664                            .rounded_md()
 1665                            .text_color(colors.text)
 1666                            .when(selected, |style| {
 1667                                style
 1668                                    .bg(colors.element_active)
 1669                                    .text_color(colors.text_accent)
 1670                            })
 1671                            .hover(|style| {
 1672                                style
 1673                                    .bg(colors.element_hover)
 1674                                    .text_color(colors.text_accent)
 1675                            })
 1676                            .whitespace_nowrap()
 1677                            .when_some(action.as_code_action(), |this, action| {
 1678                                this.on_mouse_down(
 1679                                    MouseButton::Left,
 1680                                    cx.listener(move |editor, _, cx| {
 1681                                        cx.stop_propagation();
 1682                                        if let Some(task) = editor.confirm_code_action(
 1683                                            &ConfirmCodeAction {
 1684                                                item_ix: Some(item_ix),
 1685                                            },
 1686                                            cx,
 1687                                        ) {
 1688                                            task.detach_and_log_err(cx)
 1689                                        }
 1690                                    }),
 1691                                )
 1692                                // TASK: It would be good to make lsp_action.title a SharedString to avoid allocating here.
 1693                                .child(SharedString::from(action.lsp_action.title.clone()))
 1694                            })
 1695                            .when_some(action.as_task(), |this, task| {
 1696                                this.on_mouse_down(
 1697                                    MouseButton::Left,
 1698                                    cx.listener(move |editor, _, cx| {
 1699                                        cx.stop_propagation();
 1700                                        if let Some(task) = editor.confirm_code_action(
 1701                                            &ConfirmCodeAction {
 1702                                                item_ix: Some(item_ix),
 1703                                            },
 1704                                            cx,
 1705                                        ) {
 1706                                            task.detach_and_log_err(cx)
 1707                                        }
 1708                                    }),
 1709                                )
 1710                                .child(SharedString::from(task.resolved_label.clone()))
 1711                            })
 1712                    })
 1713                    .collect()
 1714            },
 1715        )
 1716        .elevation_1(cx)
 1717        .p_1()
 1718        .max_h(max_height)
 1719        .occlude()
 1720        .track_scroll(self.scroll_handle.clone())
 1721        .with_width_from_item(
 1722            self.actions
 1723                .iter()
 1724                .enumerate()
 1725                .max_by_key(|(_, action)| match action {
 1726                    CodeActionsItem::Task(_, task) => task.resolved_label.chars().count(),
 1727                    CodeActionsItem::CodeAction { action, .. } => {
 1728                        action.lsp_action.title.chars().count()
 1729                    }
 1730                })
 1731                .map(|(ix, _)| ix),
 1732        )
 1733        .with_sizing_behavior(ListSizingBehavior::Infer)
 1734        .into_any_element();
 1735
 1736        let cursor_position = if let Some(row) = self.deployed_from_indicator {
 1737            ContextMenuOrigin::GutterIndicator(row)
 1738        } else {
 1739            ContextMenuOrigin::EditorPoint(cursor_position)
 1740        };
 1741
 1742        (cursor_position, element)
 1743    }
 1744}
 1745
 1746#[derive(Debug)]
 1747struct ActiveDiagnosticGroup {
 1748    primary_range: Range<Anchor>,
 1749    primary_message: String,
 1750    group_id: usize,
 1751    blocks: HashMap<CustomBlockId, Diagnostic>,
 1752    is_valid: bool,
 1753}
 1754
 1755#[derive(Serialize, Deserialize, Clone, Debug)]
 1756pub struct ClipboardSelection {
 1757    pub len: usize,
 1758    pub is_entire_line: bool,
 1759    pub first_line_indent: u32,
 1760}
 1761
 1762#[derive(Debug)]
 1763pub(crate) struct NavigationData {
 1764    cursor_anchor: Anchor,
 1765    cursor_position: Point,
 1766    scroll_anchor: ScrollAnchor,
 1767    scroll_top_row: u32,
 1768}
 1769
 1770#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 1771pub enum GotoDefinitionKind {
 1772    Symbol,
 1773    Declaration,
 1774    Type,
 1775    Implementation,
 1776}
 1777
 1778#[derive(Debug, Clone)]
 1779enum InlayHintRefreshReason {
 1780    Toggle(bool),
 1781    SettingsChange(InlayHintSettings),
 1782    NewLinesShown,
 1783    BufferEdited(HashSet<Arc<Language>>),
 1784    RefreshRequested,
 1785    ExcerptsRemoved(Vec<ExcerptId>),
 1786}
 1787
 1788impl InlayHintRefreshReason {
 1789    fn description(&self) -> &'static str {
 1790        match self {
 1791            Self::Toggle(_) => "toggle",
 1792            Self::SettingsChange(_) => "settings change",
 1793            Self::NewLinesShown => "new lines shown",
 1794            Self::BufferEdited(_) => "buffer edited",
 1795            Self::RefreshRequested => "refresh requested",
 1796            Self::ExcerptsRemoved(_) => "excerpts removed",
 1797        }
 1798    }
 1799}
 1800
 1801pub(crate) struct FocusedBlock {
 1802    id: BlockId,
 1803    focus_handle: WeakFocusHandle,
 1804}
 1805
 1806#[derive(Clone)]
 1807struct JumpData {
 1808    excerpt_id: ExcerptId,
 1809    position: Point,
 1810    anchor: text::Anchor,
 1811    path: Option<project::ProjectPath>,
 1812    line_offset_from_top: u32,
 1813}
 1814
 1815impl Editor {
 1816    pub fn single_line(cx: &mut ViewContext<Self>) -> Self {
 1817        let buffer = cx.new_model(|cx| Buffer::local("", cx));
 1818        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1819        Self::new(
 1820            EditorMode::SingleLine { auto_width: false },
 1821            buffer,
 1822            None,
 1823            false,
 1824            cx,
 1825        )
 1826    }
 1827
 1828    pub fn multi_line(cx: &mut ViewContext<Self>) -> Self {
 1829        let buffer = cx.new_model(|cx| Buffer::local("", cx));
 1830        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1831        Self::new(EditorMode::Full, buffer, None, false, cx)
 1832    }
 1833
 1834    pub fn auto_width(cx: &mut ViewContext<Self>) -> Self {
 1835        let buffer = cx.new_model(|cx| Buffer::local("", cx));
 1836        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1837        Self::new(
 1838            EditorMode::SingleLine { auto_width: true },
 1839            buffer,
 1840            None,
 1841            false,
 1842            cx,
 1843        )
 1844    }
 1845
 1846    pub fn auto_height(max_lines: usize, cx: &mut ViewContext<Self>) -> Self {
 1847        let buffer = cx.new_model(|cx| Buffer::local("", cx));
 1848        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1849        Self::new(
 1850            EditorMode::AutoHeight { max_lines },
 1851            buffer,
 1852            None,
 1853            false,
 1854            cx,
 1855        )
 1856    }
 1857
 1858    pub fn for_buffer(
 1859        buffer: Model<Buffer>,
 1860        project: Option<Model<Project>>,
 1861        cx: &mut ViewContext<Self>,
 1862    ) -> Self {
 1863        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1864        Self::new(EditorMode::Full, buffer, project, false, cx)
 1865    }
 1866
 1867    pub fn for_multibuffer(
 1868        buffer: Model<MultiBuffer>,
 1869        project: Option<Model<Project>>,
 1870        show_excerpt_controls: bool,
 1871        cx: &mut ViewContext<Self>,
 1872    ) -> Self {
 1873        Self::new(EditorMode::Full, buffer, project, show_excerpt_controls, cx)
 1874    }
 1875
 1876    pub fn clone(&self, cx: &mut ViewContext<Self>) -> Self {
 1877        let show_excerpt_controls = self.display_map.read(cx).show_excerpt_controls();
 1878        let mut clone = Self::new(
 1879            self.mode,
 1880            self.buffer.clone(),
 1881            self.project.clone(),
 1882            show_excerpt_controls,
 1883            cx,
 1884        );
 1885        self.display_map.update(cx, |display_map, cx| {
 1886            let snapshot = display_map.snapshot(cx);
 1887            clone.display_map.update(cx, |display_map, cx| {
 1888                display_map.set_state(&snapshot, cx);
 1889            });
 1890        });
 1891        clone.selections.clone_state(&self.selections);
 1892        clone.scroll_manager.clone_state(&self.scroll_manager);
 1893        clone.searchable = self.searchable;
 1894        clone
 1895    }
 1896
 1897    pub fn new(
 1898        mode: EditorMode,
 1899        buffer: Model<MultiBuffer>,
 1900        project: Option<Model<Project>>,
 1901        show_excerpt_controls: bool,
 1902        cx: &mut ViewContext<Self>,
 1903    ) -> Self {
 1904        let style = cx.text_style();
 1905        let font_size = style.font_size.to_pixels(cx.rem_size());
 1906        let editor = cx.view().downgrade();
 1907        let fold_placeholder = FoldPlaceholder {
 1908            constrain_width: true,
 1909            render: Arc::new(move |fold_id, fold_range, cx| {
 1910                let editor = editor.clone();
 1911                div()
 1912                    .id(fold_id)
 1913                    .bg(cx.theme().colors().ghost_element_background)
 1914                    .hover(|style| style.bg(cx.theme().colors().ghost_element_hover))
 1915                    .active(|style| style.bg(cx.theme().colors().ghost_element_active))
 1916                    .rounded_sm()
 1917                    .size_full()
 1918                    .cursor_pointer()
 1919                    .child("⋯")
 1920                    .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
 1921                    .on_click(move |_, cx| {
 1922                        editor
 1923                            .update(cx, |editor, cx| {
 1924                                editor.unfold_ranges(
 1925                                    &[fold_range.start..fold_range.end],
 1926                                    true,
 1927                                    false,
 1928                                    cx,
 1929                                );
 1930                                cx.stop_propagation();
 1931                            })
 1932                            .ok();
 1933                    })
 1934                    .into_any()
 1935            }),
 1936            merge_adjacent: true,
 1937            ..Default::default()
 1938        };
 1939        let display_map = cx.new_model(|cx| {
 1940            DisplayMap::new(
 1941                buffer.clone(),
 1942                style.font(),
 1943                font_size,
 1944                None,
 1945                show_excerpt_controls,
 1946                FILE_HEADER_HEIGHT,
 1947                MULTI_BUFFER_EXCERPT_HEADER_HEIGHT,
 1948                MULTI_BUFFER_EXCERPT_FOOTER_HEIGHT,
 1949                fold_placeholder,
 1950                cx,
 1951            )
 1952        });
 1953
 1954        let selections = SelectionsCollection::new(display_map.clone(), buffer.clone());
 1955
 1956        let blink_manager = cx.new_model(|cx| BlinkManager::new(CURSOR_BLINK_INTERVAL, cx));
 1957
 1958        let soft_wrap_mode_override = matches!(mode, EditorMode::SingleLine { .. })
 1959            .then(|| language_settings::SoftWrap::None);
 1960
 1961        let mut project_subscriptions = Vec::new();
 1962        if mode == EditorMode::Full {
 1963            if let Some(project) = project.as_ref() {
 1964                if buffer.read(cx).is_singleton() {
 1965                    project_subscriptions.push(cx.observe(project, |_, _, cx| {
 1966                        cx.emit(EditorEvent::TitleChanged);
 1967                    }));
 1968                }
 1969                project_subscriptions.push(cx.subscribe(project, |editor, _, event, cx| {
 1970                    if let project::Event::RefreshInlayHints = event {
 1971                        editor.refresh_inlay_hints(InlayHintRefreshReason::RefreshRequested, cx);
 1972                    } else if let project::Event::SnippetEdit(id, snippet_edits) = event {
 1973                        if let Some(buffer) = editor.buffer.read(cx).buffer(*id) {
 1974                            let focus_handle = editor.focus_handle(cx);
 1975                            if focus_handle.is_focused(cx) {
 1976                                let snapshot = buffer.read(cx).snapshot();
 1977                                for (range, snippet) in snippet_edits {
 1978                                    let editor_range =
 1979                                        language::range_from_lsp(*range).to_offset(&snapshot);
 1980                                    editor
 1981                                        .insert_snippet(&[editor_range], snippet.clone(), cx)
 1982                                        .ok();
 1983                                }
 1984                            }
 1985                        }
 1986                    }
 1987                }));
 1988                if let Some(task_inventory) = project
 1989                    .read(cx)
 1990                    .task_store()
 1991                    .read(cx)
 1992                    .task_inventory()
 1993                    .cloned()
 1994                {
 1995                    project_subscriptions.push(cx.observe(&task_inventory, |editor, _, cx| {
 1996                        editor.tasks_update_task = Some(editor.refresh_runnables(cx));
 1997                    }));
 1998                }
 1999            }
 2000        }
 2001
 2002        let inlay_hint_settings = inlay_hint_settings(
 2003            selections.newest_anchor().head(),
 2004            &buffer.read(cx).snapshot(cx),
 2005            cx,
 2006        );
 2007        let focus_handle = cx.focus_handle();
 2008        cx.on_focus(&focus_handle, Self::handle_focus).detach();
 2009        cx.on_focus_in(&focus_handle, Self::handle_focus_in)
 2010            .detach();
 2011        cx.on_focus_out(&focus_handle, Self::handle_focus_out)
 2012            .detach();
 2013        cx.on_blur(&focus_handle, Self::handle_blur).detach();
 2014
 2015        let show_indent_guides = if matches!(mode, EditorMode::SingleLine { .. }) {
 2016            Some(false)
 2017        } else {
 2018            None
 2019        };
 2020
 2021        let mut code_action_providers = Vec::new();
 2022        if let Some(project) = project.clone() {
 2023            code_action_providers.push(Arc::new(project) as Arc<_>);
 2024        }
 2025
 2026        let mut this = Self {
 2027            focus_handle,
 2028            show_cursor_when_unfocused: false,
 2029            last_focused_descendant: None,
 2030            buffer: buffer.clone(),
 2031            display_map: display_map.clone(),
 2032            selections,
 2033            scroll_manager: ScrollManager::new(cx),
 2034            columnar_selection_tail: None,
 2035            add_selections_state: None,
 2036            select_next_state: None,
 2037            select_prev_state: None,
 2038            selection_history: Default::default(),
 2039            autoclose_regions: Default::default(),
 2040            snippet_stack: Default::default(),
 2041            select_larger_syntax_node_stack: Vec::new(),
 2042            ime_transaction: Default::default(),
 2043            active_diagnostics: None,
 2044            soft_wrap_mode_override,
 2045            completion_provider: project.clone().map(|project| Box::new(project) as _),
 2046            semantics_provider: project.clone().map(|project| Rc::new(project) as _),
 2047            collaboration_hub: project.clone().map(|project| Box::new(project) as _),
 2048            project,
 2049            blink_manager: blink_manager.clone(),
 2050            show_local_selections: true,
 2051            mode,
 2052            show_breadcrumbs: EditorSettings::get_global(cx).toolbar.breadcrumbs,
 2053            show_gutter: mode == EditorMode::Full,
 2054            show_line_numbers: None,
 2055            use_relative_line_numbers: None,
 2056            show_git_diff_gutter: None,
 2057            show_code_actions: None,
 2058            show_runnables: None,
 2059            show_wrap_guides: None,
 2060            show_indent_guides,
 2061            placeholder_text: None,
 2062            highlight_order: 0,
 2063            highlighted_rows: HashMap::default(),
 2064            background_highlights: Default::default(),
 2065            gutter_highlights: TreeMap::default(),
 2066            scrollbar_marker_state: ScrollbarMarkerState::default(),
 2067            active_indent_guides_state: ActiveIndentGuidesState::default(),
 2068            nav_history: None,
 2069            context_menu: RwLock::new(None),
 2070            mouse_context_menu: None,
 2071            hunk_controls_menu_handle: PopoverMenuHandle::default(),
 2072            completion_tasks: Default::default(),
 2073            signature_help_state: SignatureHelpState::default(),
 2074            auto_signature_help: None,
 2075            find_all_references_task_sources: Vec::new(),
 2076            next_completion_id: 0,
 2077            next_inlay_id: 0,
 2078            code_action_providers,
 2079            available_code_actions: Default::default(),
 2080            code_actions_task: Default::default(),
 2081            document_highlights_task: Default::default(),
 2082            linked_editing_range_task: Default::default(),
 2083            pending_rename: Default::default(),
 2084            searchable: true,
 2085            cursor_shape: EditorSettings::get_global(cx)
 2086                .cursor_shape
 2087                .unwrap_or_default(),
 2088            current_line_highlight: None,
 2089            autoindent_mode: Some(AutoindentMode::EachLine),
 2090            collapse_matches: false,
 2091            workspace: None,
 2092            input_enabled: true,
 2093            use_modal_editing: mode == EditorMode::Full,
 2094            read_only: false,
 2095            use_autoclose: true,
 2096            use_auto_surround: true,
 2097            auto_replace_emoji_shortcode: false,
 2098            leader_peer_id: None,
 2099            remote_id: None,
 2100            hover_state: Default::default(),
 2101            hovered_link_state: Default::default(),
 2102            inline_completion_provider: None,
 2103            active_inline_completion: None,
 2104            inlay_hint_cache: InlayHintCache::new(inlay_hint_settings),
 2105            expanded_hunks: ExpandedHunks::default(),
 2106            gutter_hovered: false,
 2107            pixel_position_of_newest_cursor: None,
 2108            last_bounds: None,
 2109            expect_bounds_change: None,
 2110            gutter_dimensions: GutterDimensions::default(),
 2111            style: None,
 2112            show_cursor_names: false,
 2113            hovered_cursors: Default::default(),
 2114            next_editor_action_id: EditorActionId::default(),
 2115            editor_actions: Rc::default(),
 2116            show_inline_completions_override: None,
 2117            enable_inline_completions: true,
 2118            custom_context_menu: None,
 2119            show_git_blame_gutter: false,
 2120            show_git_blame_inline: false,
 2121            show_selection_menu: None,
 2122            show_git_blame_inline_delay_task: None,
 2123            git_blame_inline_enabled: ProjectSettings::get_global(cx).git.inline_blame_enabled(),
 2124            serialize_dirty_buffers: ProjectSettings::get_global(cx)
 2125                .session
 2126                .restore_unsaved_buffers,
 2127            blame: None,
 2128            blame_subscription: None,
 2129            tasks: Default::default(),
 2130            _subscriptions: vec![
 2131                cx.observe(&buffer, Self::on_buffer_changed),
 2132                cx.subscribe(&buffer, Self::on_buffer_event),
 2133                cx.observe(&display_map, Self::on_display_map_changed),
 2134                cx.observe(&blink_manager, |_, _, cx| cx.notify()),
 2135                cx.observe_global::<SettingsStore>(Self::settings_changed),
 2136                observe_buffer_font_size_adjustment(cx, |_, cx| cx.notify()),
 2137                cx.observe_window_activation(|editor, cx| {
 2138                    let active = cx.is_window_active();
 2139                    editor.blink_manager.update(cx, |blink_manager, cx| {
 2140                        if active {
 2141                            blink_manager.enable(cx);
 2142                        } else {
 2143                            blink_manager.disable(cx);
 2144                        }
 2145                    });
 2146                }),
 2147            ],
 2148            tasks_update_task: None,
 2149            linked_edit_ranges: Default::default(),
 2150            previous_search_ranges: None,
 2151            breadcrumb_header: None,
 2152            focused_block: None,
 2153            next_scroll_position: NextScrollCursorCenterTopBottom::default(),
 2154            addons: HashMap::default(),
 2155            _scroll_cursor_center_top_bottom_task: Task::ready(()),
 2156            text_style_refinement: None,
 2157        };
 2158        this.tasks_update_task = Some(this.refresh_runnables(cx));
 2159        this._subscriptions.extend(project_subscriptions);
 2160
 2161        this.end_selection(cx);
 2162        this.scroll_manager.show_scrollbar(cx);
 2163
 2164        if mode == EditorMode::Full {
 2165            let should_auto_hide_scrollbars = cx.should_auto_hide_scrollbars();
 2166            cx.set_global(ScrollbarAutoHide(should_auto_hide_scrollbars));
 2167
 2168            if this.git_blame_inline_enabled {
 2169                this.git_blame_inline_enabled = true;
 2170                this.start_git_blame_inline(false, cx);
 2171            }
 2172        }
 2173
 2174        this.report_editor_event("open", None, cx);
 2175        this
 2176    }
 2177
 2178    pub fn mouse_menu_is_focused(&self, cx: &WindowContext) -> bool {
 2179        self.mouse_context_menu
 2180            .as_ref()
 2181            .is_some_and(|menu| menu.context_menu.focus_handle(cx).is_focused(cx))
 2182    }
 2183
 2184    fn key_context(&self, cx: &ViewContext<Self>) -> KeyContext {
 2185        let mut key_context = KeyContext::new_with_defaults();
 2186        key_context.add("Editor");
 2187        let mode = match self.mode {
 2188            EditorMode::SingleLine { .. } => "single_line",
 2189            EditorMode::AutoHeight { .. } => "auto_height",
 2190            EditorMode::Full => "full",
 2191        };
 2192
 2193        if EditorSettings::jupyter_enabled(cx) {
 2194            key_context.add("jupyter");
 2195        }
 2196
 2197        key_context.set("mode", mode);
 2198        if self.pending_rename.is_some() {
 2199            key_context.add("renaming");
 2200        }
 2201        if self.context_menu_visible() {
 2202            match self.context_menu.read().as_ref() {
 2203                Some(ContextMenu::Completions(_)) => {
 2204                    key_context.add("menu");
 2205                    key_context.add("showing_completions")
 2206                }
 2207                Some(ContextMenu::CodeActions(_)) => {
 2208                    key_context.add("menu");
 2209                    key_context.add("showing_code_actions")
 2210                }
 2211                None => {}
 2212            }
 2213        }
 2214
 2215        // Disable vim contexts when a sub-editor (e.g. rename/inline assistant) is focused.
 2216        if !self.focus_handle(cx).contains_focused(cx)
 2217            || (self.is_focused(cx) || self.mouse_menu_is_focused(cx))
 2218        {
 2219            for addon in self.addons.values() {
 2220                addon.extend_key_context(&mut key_context, cx)
 2221            }
 2222        }
 2223
 2224        if let Some(extension) = self
 2225            .buffer
 2226            .read(cx)
 2227            .as_singleton()
 2228            .and_then(|buffer| buffer.read(cx).file()?.path().extension()?.to_str())
 2229        {
 2230            key_context.set("extension", extension.to_string());
 2231        }
 2232
 2233        if self.has_active_inline_completion(cx) {
 2234            key_context.add("copilot_suggestion");
 2235            key_context.add("inline_completion");
 2236        }
 2237
 2238        key_context
 2239    }
 2240
 2241    pub fn new_file(
 2242        workspace: &mut Workspace,
 2243        _: &workspace::NewFile,
 2244        cx: &mut ViewContext<Workspace>,
 2245    ) {
 2246        Self::new_in_workspace(workspace, cx).detach_and_prompt_err(
 2247            "Failed to create buffer",
 2248            cx,
 2249            |e, _| match e.error_code() {
 2250                ErrorCode::RemoteUpgradeRequired => Some(format!(
 2251                "The remote instance of Zed does not support this yet. It must be upgraded to {}",
 2252                e.error_tag("required").unwrap_or("the latest version")
 2253            )),
 2254                _ => None,
 2255            },
 2256        );
 2257    }
 2258
 2259    pub fn new_in_workspace(
 2260        workspace: &mut Workspace,
 2261        cx: &mut ViewContext<Workspace>,
 2262    ) -> Task<Result<View<Editor>>> {
 2263        let project = workspace.project().clone();
 2264        let create = project.update(cx, |project, cx| project.create_buffer(cx));
 2265
 2266        cx.spawn(|workspace, mut cx| async move {
 2267            let buffer = create.await?;
 2268            workspace.update(&mut cx, |workspace, cx| {
 2269                let editor =
 2270                    cx.new_view(|cx| Editor::for_buffer(buffer, Some(project.clone()), cx));
 2271                workspace.add_item_to_active_pane(Box::new(editor.clone()), None, true, cx);
 2272                editor
 2273            })
 2274        })
 2275    }
 2276
 2277    fn new_file_vertical(
 2278        workspace: &mut Workspace,
 2279        _: &workspace::NewFileSplitVertical,
 2280        cx: &mut ViewContext<Workspace>,
 2281    ) {
 2282        Self::new_file_in_direction(workspace, SplitDirection::vertical(cx), cx)
 2283    }
 2284
 2285    fn new_file_horizontal(
 2286        workspace: &mut Workspace,
 2287        _: &workspace::NewFileSplitHorizontal,
 2288        cx: &mut ViewContext<Workspace>,
 2289    ) {
 2290        Self::new_file_in_direction(workspace, SplitDirection::horizontal(cx), cx)
 2291    }
 2292
 2293    fn new_file_in_direction(
 2294        workspace: &mut Workspace,
 2295        direction: SplitDirection,
 2296        cx: &mut ViewContext<Workspace>,
 2297    ) {
 2298        let project = workspace.project().clone();
 2299        let create = project.update(cx, |project, cx| project.create_buffer(cx));
 2300
 2301        cx.spawn(|workspace, mut cx| async move {
 2302            let buffer = create.await?;
 2303            workspace.update(&mut cx, move |workspace, cx| {
 2304                workspace.split_item(
 2305                    direction,
 2306                    Box::new(
 2307                        cx.new_view(|cx| Editor::for_buffer(buffer, Some(project.clone()), cx)),
 2308                    ),
 2309                    cx,
 2310                )
 2311            })?;
 2312            anyhow::Ok(())
 2313        })
 2314        .detach_and_prompt_err("Failed to create buffer", cx, |e, _| match e.error_code() {
 2315            ErrorCode::RemoteUpgradeRequired => Some(format!(
 2316                "The remote instance of Zed does not support this yet. It must be upgraded to {}",
 2317                e.error_tag("required").unwrap_or("the latest version")
 2318            )),
 2319            _ => None,
 2320        });
 2321    }
 2322
 2323    pub fn leader_peer_id(&self) -> Option<PeerId> {
 2324        self.leader_peer_id
 2325    }
 2326
 2327    pub fn buffer(&self) -> &Model<MultiBuffer> {
 2328        &self.buffer
 2329    }
 2330
 2331    pub fn workspace(&self) -> Option<View<Workspace>> {
 2332        self.workspace.as_ref()?.0.upgrade()
 2333    }
 2334
 2335    pub fn title<'a>(&self, cx: &'a AppContext) -> Cow<'a, str> {
 2336        self.buffer().read(cx).title(cx)
 2337    }
 2338
 2339    pub fn snapshot(&mut self, cx: &mut WindowContext) -> EditorSnapshot {
 2340        let git_blame_gutter_max_author_length = self
 2341            .render_git_blame_gutter(cx)
 2342            .then(|| {
 2343                if let Some(blame) = self.blame.as_ref() {
 2344                    let max_author_length =
 2345                        blame.update(cx, |blame, cx| blame.max_author_length(cx));
 2346                    Some(max_author_length)
 2347                } else {
 2348                    None
 2349                }
 2350            })
 2351            .flatten();
 2352
 2353        EditorSnapshot {
 2354            mode: self.mode,
 2355            show_gutter: self.show_gutter,
 2356            show_line_numbers: self.show_line_numbers,
 2357            show_git_diff_gutter: self.show_git_diff_gutter,
 2358            show_code_actions: self.show_code_actions,
 2359            show_runnables: self.show_runnables,
 2360            git_blame_gutter_max_author_length,
 2361            display_snapshot: self.display_map.update(cx, |map, cx| map.snapshot(cx)),
 2362            scroll_anchor: self.scroll_manager.anchor(),
 2363            ongoing_scroll: self.scroll_manager.ongoing_scroll(),
 2364            placeholder_text: self.placeholder_text.clone(),
 2365            is_focused: self.focus_handle.is_focused(cx),
 2366            current_line_highlight: self
 2367                .current_line_highlight
 2368                .unwrap_or_else(|| EditorSettings::get_global(cx).current_line_highlight),
 2369            gutter_hovered: self.gutter_hovered,
 2370        }
 2371    }
 2372
 2373    pub fn language_at<T: ToOffset>(&self, point: T, cx: &AppContext) -> Option<Arc<Language>> {
 2374        self.buffer.read(cx).language_at(point, cx)
 2375    }
 2376
 2377    pub fn file_at<T: ToOffset>(
 2378        &self,
 2379        point: T,
 2380        cx: &AppContext,
 2381    ) -> Option<Arc<dyn language::File>> {
 2382        self.buffer.read(cx).read(cx).file_at(point).cloned()
 2383    }
 2384
 2385    pub fn active_excerpt(
 2386        &self,
 2387        cx: &AppContext,
 2388    ) -> Option<(ExcerptId, Model<Buffer>, Range<text::Anchor>)> {
 2389        self.buffer
 2390            .read(cx)
 2391            .excerpt_containing(self.selections.newest_anchor().head(), cx)
 2392    }
 2393
 2394    pub fn mode(&self) -> EditorMode {
 2395        self.mode
 2396    }
 2397
 2398    pub fn collaboration_hub(&self) -> Option<&dyn CollaborationHub> {
 2399        self.collaboration_hub.as_deref()
 2400    }
 2401
 2402    pub fn set_collaboration_hub(&mut self, hub: Box<dyn CollaborationHub>) {
 2403        self.collaboration_hub = Some(hub);
 2404    }
 2405
 2406    pub fn set_custom_context_menu(
 2407        &mut self,
 2408        f: impl 'static
 2409            + Fn(&mut Self, DisplayPoint, &mut ViewContext<Self>) -> Option<View<ui::ContextMenu>>,
 2410    ) {
 2411        self.custom_context_menu = Some(Box::new(f))
 2412    }
 2413
 2414    pub fn set_completion_provider(&mut self, provider: Option<Box<dyn CompletionProvider>>) {
 2415        self.completion_provider = provider;
 2416    }
 2417
 2418    pub fn semantics_provider(&self) -> Option<Rc<dyn SemanticsProvider>> {
 2419        self.semantics_provider.clone()
 2420    }
 2421
 2422    pub fn set_semantics_provider(&mut self, provider: Option<Rc<dyn SemanticsProvider>>) {
 2423        self.semantics_provider = provider;
 2424    }
 2425
 2426    pub fn set_inline_completion_provider<T>(
 2427        &mut self,
 2428        provider: Option<Model<T>>,
 2429        cx: &mut ViewContext<Self>,
 2430    ) where
 2431        T: InlineCompletionProvider,
 2432    {
 2433        self.inline_completion_provider =
 2434            provider.map(|provider| RegisteredInlineCompletionProvider {
 2435                _subscription: cx.observe(&provider, |this, _, cx| {
 2436                    if this.focus_handle.is_focused(cx) {
 2437                        this.update_visible_inline_completion(cx);
 2438                    }
 2439                }),
 2440                provider: Arc::new(provider),
 2441            });
 2442        self.refresh_inline_completion(false, false, cx);
 2443    }
 2444
 2445    pub fn placeholder_text(&self, _cx: &WindowContext) -> Option<&str> {
 2446        self.placeholder_text.as_deref()
 2447    }
 2448
 2449    pub fn set_placeholder_text(
 2450        &mut self,
 2451        placeholder_text: impl Into<Arc<str>>,
 2452        cx: &mut ViewContext<Self>,
 2453    ) {
 2454        let placeholder_text = Some(placeholder_text.into());
 2455        if self.placeholder_text != placeholder_text {
 2456            self.placeholder_text = placeholder_text;
 2457            cx.notify();
 2458        }
 2459    }
 2460
 2461    pub fn set_cursor_shape(&mut self, cursor_shape: CursorShape, cx: &mut ViewContext<Self>) {
 2462        self.cursor_shape = cursor_shape;
 2463
 2464        // Disrupt blink for immediate user feedback that the cursor shape has changed
 2465        self.blink_manager.update(cx, BlinkManager::show_cursor);
 2466
 2467        cx.notify();
 2468    }
 2469
 2470    pub fn set_current_line_highlight(
 2471        &mut self,
 2472        current_line_highlight: Option<CurrentLineHighlight>,
 2473    ) {
 2474        self.current_line_highlight = current_line_highlight;
 2475    }
 2476
 2477    pub fn set_collapse_matches(&mut self, collapse_matches: bool) {
 2478        self.collapse_matches = collapse_matches;
 2479    }
 2480
 2481    pub fn range_for_match<T: std::marker::Copy>(&self, range: &Range<T>) -> Range<T> {
 2482        if self.collapse_matches {
 2483            return range.start..range.start;
 2484        }
 2485        range.clone()
 2486    }
 2487
 2488    pub fn set_clip_at_line_ends(&mut self, clip: bool, cx: &mut ViewContext<Self>) {
 2489        if self.display_map.read(cx).clip_at_line_ends != clip {
 2490            self.display_map
 2491                .update(cx, |map, _| map.clip_at_line_ends = clip);
 2492        }
 2493    }
 2494
 2495    pub fn set_input_enabled(&mut self, input_enabled: bool) {
 2496        self.input_enabled = input_enabled;
 2497    }
 2498
 2499    pub fn set_inline_completions_enabled(&mut self, enabled: bool) {
 2500        self.enable_inline_completions = enabled;
 2501    }
 2502
 2503    pub fn set_autoindent(&mut self, autoindent: bool) {
 2504        if autoindent {
 2505            self.autoindent_mode = Some(AutoindentMode::EachLine);
 2506        } else {
 2507            self.autoindent_mode = None;
 2508        }
 2509    }
 2510
 2511    pub fn read_only(&self, cx: &AppContext) -> bool {
 2512        self.read_only || self.buffer.read(cx).read_only()
 2513    }
 2514
 2515    pub fn set_read_only(&mut self, read_only: bool) {
 2516        self.read_only = read_only;
 2517    }
 2518
 2519    pub fn set_use_autoclose(&mut self, autoclose: bool) {
 2520        self.use_autoclose = autoclose;
 2521    }
 2522
 2523    pub fn set_use_auto_surround(&mut self, auto_surround: bool) {
 2524        self.use_auto_surround = auto_surround;
 2525    }
 2526
 2527    pub fn set_auto_replace_emoji_shortcode(&mut self, auto_replace: bool) {
 2528        self.auto_replace_emoji_shortcode = auto_replace;
 2529    }
 2530
 2531    pub fn toggle_inline_completions(
 2532        &mut self,
 2533        _: &ToggleInlineCompletions,
 2534        cx: &mut ViewContext<Self>,
 2535    ) {
 2536        if self.show_inline_completions_override.is_some() {
 2537            self.set_show_inline_completions(None, cx);
 2538        } else {
 2539            let cursor = self.selections.newest_anchor().head();
 2540            if let Some((buffer, cursor_buffer_position)) =
 2541                self.buffer.read(cx).text_anchor_for_position(cursor, cx)
 2542            {
 2543                let show_inline_completions =
 2544                    !self.should_show_inline_completions(&buffer, cursor_buffer_position, cx);
 2545                self.set_show_inline_completions(Some(show_inline_completions), cx);
 2546            }
 2547        }
 2548    }
 2549
 2550    pub fn set_show_inline_completions(
 2551        &mut self,
 2552        show_inline_completions: Option<bool>,
 2553        cx: &mut ViewContext<Self>,
 2554    ) {
 2555        self.show_inline_completions_override = show_inline_completions;
 2556        self.refresh_inline_completion(false, true, cx);
 2557    }
 2558
 2559    fn should_show_inline_completions(
 2560        &self,
 2561        buffer: &Model<Buffer>,
 2562        buffer_position: language::Anchor,
 2563        cx: &AppContext,
 2564    ) -> bool {
 2565        if !self.snippet_stack.is_empty() {
 2566            return false;
 2567        }
 2568
 2569        if self.inline_completions_disabled_in_scope(buffer, buffer_position, cx) {
 2570            return false;
 2571        }
 2572
 2573        if let Some(provider) = self.inline_completion_provider() {
 2574            if let Some(show_inline_completions) = self.show_inline_completions_override {
 2575                show_inline_completions
 2576            } else {
 2577                self.mode == EditorMode::Full && provider.is_enabled(buffer, buffer_position, cx)
 2578            }
 2579        } else {
 2580            false
 2581        }
 2582    }
 2583
 2584    fn inline_completions_disabled_in_scope(
 2585        &self,
 2586        buffer: &Model<Buffer>,
 2587        buffer_position: language::Anchor,
 2588        cx: &AppContext,
 2589    ) -> bool {
 2590        let snapshot = buffer.read(cx).snapshot();
 2591        let settings = snapshot.settings_at(buffer_position, cx);
 2592
 2593        let Some(scope) = snapshot.language_scope_at(buffer_position) else {
 2594            return false;
 2595        };
 2596
 2597        scope.override_name().map_or(false, |scope_name| {
 2598            settings
 2599                .inline_completions_disabled_in
 2600                .iter()
 2601                .any(|s| s == scope_name)
 2602        })
 2603    }
 2604
 2605    pub fn set_use_modal_editing(&mut self, to: bool) {
 2606        self.use_modal_editing = to;
 2607    }
 2608
 2609    pub fn use_modal_editing(&self) -> bool {
 2610        self.use_modal_editing
 2611    }
 2612
 2613    fn selections_did_change(
 2614        &mut self,
 2615        local: bool,
 2616        old_cursor_position: &Anchor,
 2617        show_completions: bool,
 2618        cx: &mut ViewContext<Self>,
 2619    ) {
 2620        cx.invalidate_character_coordinates();
 2621
 2622        // Copy selections to primary selection buffer
 2623        #[cfg(any(target_os = "linux", target_os = "freebsd"))]
 2624        if local {
 2625            let selections = self.selections.all::<usize>(cx);
 2626            let buffer_handle = self.buffer.read(cx).read(cx);
 2627
 2628            let mut text = String::new();
 2629            for (index, selection) in selections.iter().enumerate() {
 2630                let text_for_selection = buffer_handle
 2631                    .text_for_range(selection.start..selection.end)
 2632                    .collect::<String>();
 2633
 2634                text.push_str(&text_for_selection);
 2635                if index != selections.len() - 1 {
 2636                    text.push('\n');
 2637                }
 2638            }
 2639
 2640            if !text.is_empty() {
 2641                cx.write_to_primary(ClipboardItem::new_string(text));
 2642            }
 2643        }
 2644
 2645        if self.focus_handle.is_focused(cx) && self.leader_peer_id.is_none() {
 2646            self.buffer.update(cx, |buffer, cx| {
 2647                buffer.set_active_selections(
 2648                    &self.selections.disjoint_anchors(),
 2649                    self.selections.line_mode,
 2650                    self.cursor_shape,
 2651                    cx,
 2652                )
 2653            });
 2654        }
 2655        let display_map = self
 2656            .display_map
 2657            .update(cx, |display_map, cx| display_map.snapshot(cx));
 2658        let buffer = &display_map.buffer_snapshot;
 2659        self.add_selections_state = None;
 2660        self.select_next_state = None;
 2661        self.select_prev_state = None;
 2662        self.select_larger_syntax_node_stack.clear();
 2663        self.invalidate_autoclose_regions(&self.selections.disjoint_anchors(), buffer);
 2664        self.snippet_stack
 2665            .invalidate(&self.selections.disjoint_anchors(), buffer);
 2666        self.take_rename(false, cx);
 2667
 2668        let new_cursor_position = self.selections.newest_anchor().head();
 2669
 2670        self.push_to_nav_history(
 2671            *old_cursor_position,
 2672            Some(new_cursor_position.to_point(buffer)),
 2673            cx,
 2674        );
 2675
 2676        if local {
 2677            let new_cursor_position = self.selections.newest_anchor().head();
 2678            let mut context_menu = self.context_menu.write();
 2679            let completion_menu = match context_menu.as_ref() {
 2680                Some(ContextMenu::Completions(menu)) => Some(menu),
 2681
 2682                _ => {
 2683                    *context_menu = None;
 2684                    None
 2685                }
 2686            };
 2687
 2688            if let Some(completion_menu) = completion_menu {
 2689                let cursor_position = new_cursor_position.to_offset(buffer);
 2690                let (word_range, kind) =
 2691                    buffer.surrounding_word(completion_menu.initial_position, true);
 2692                if kind == Some(CharKind::Word)
 2693                    && word_range.to_inclusive().contains(&cursor_position)
 2694                {
 2695                    let mut completion_menu = completion_menu.clone();
 2696                    drop(context_menu);
 2697
 2698                    let query = Self::completion_query(buffer, cursor_position);
 2699                    cx.spawn(move |this, mut cx| async move {
 2700                        completion_menu
 2701                            .filter(query.as_deref(), cx.background_executor().clone())
 2702                            .await;
 2703
 2704                        this.update(&mut cx, |this, cx| {
 2705                            let mut context_menu = this.context_menu.write();
 2706                            let Some(ContextMenu::Completions(menu)) = context_menu.as_ref() else {
 2707                                return;
 2708                            };
 2709
 2710                            if menu.id > completion_menu.id {
 2711                                return;
 2712                            }
 2713
 2714                            *context_menu = Some(ContextMenu::Completions(completion_menu));
 2715                            drop(context_menu);
 2716                            cx.notify();
 2717                        })
 2718                    })
 2719                    .detach();
 2720
 2721                    if show_completions {
 2722                        self.show_completions(&ShowCompletions { trigger: None }, cx);
 2723                    }
 2724                } else {
 2725                    drop(context_menu);
 2726                    self.hide_context_menu(cx);
 2727                }
 2728            } else {
 2729                drop(context_menu);
 2730            }
 2731
 2732            hide_hover(self, cx);
 2733
 2734            if old_cursor_position.to_display_point(&display_map).row()
 2735                != new_cursor_position.to_display_point(&display_map).row()
 2736            {
 2737                self.available_code_actions.take();
 2738            }
 2739            self.refresh_code_actions(cx);
 2740            self.refresh_document_highlights(cx);
 2741            refresh_matching_bracket_highlights(self, cx);
 2742            self.discard_inline_completion(false, cx);
 2743            linked_editing_ranges::refresh_linked_ranges(self, cx);
 2744            if self.git_blame_inline_enabled {
 2745                self.start_inline_blame_timer(cx);
 2746            }
 2747        }
 2748
 2749        self.blink_manager.update(cx, BlinkManager::pause_blinking);
 2750        cx.emit(EditorEvent::SelectionsChanged { local });
 2751
 2752        if self.selections.disjoint_anchors().len() == 1 {
 2753            cx.emit(SearchEvent::ActiveMatchChanged)
 2754        }
 2755        cx.notify();
 2756    }
 2757
 2758    pub fn change_selections<R>(
 2759        &mut self,
 2760        autoscroll: Option<Autoscroll>,
 2761        cx: &mut ViewContext<Self>,
 2762        change: impl FnOnce(&mut MutableSelectionsCollection<'_>) -> R,
 2763    ) -> R {
 2764        self.change_selections_inner(autoscroll, true, cx, change)
 2765    }
 2766
 2767    pub fn change_selections_inner<R>(
 2768        &mut self,
 2769        autoscroll: Option<Autoscroll>,
 2770        request_completions: bool,
 2771        cx: &mut ViewContext<Self>,
 2772        change: impl FnOnce(&mut MutableSelectionsCollection<'_>) -> R,
 2773    ) -> R {
 2774        let old_cursor_position = self.selections.newest_anchor().head();
 2775        self.push_to_selection_history();
 2776
 2777        let (changed, result) = self.selections.change_with(cx, change);
 2778
 2779        if changed {
 2780            if let Some(autoscroll) = autoscroll {
 2781                self.request_autoscroll(autoscroll, cx);
 2782            }
 2783            self.selections_did_change(true, &old_cursor_position, request_completions, cx);
 2784
 2785            if self.should_open_signature_help_automatically(
 2786                &old_cursor_position,
 2787                self.signature_help_state.backspace_pressed(),
 2788                cx,
 2789            ) {
 2790                self.show_signature_help(&ShowSignatureHelp, cx);
 2791            }
 2792            self.signature_help_state.set_backspace_pressed(false);
 2793        }
 2794
 2795        result
 2796    }
 2797
 2798    pub fn edit<I, S, T>(&mut self, edits: I, cx: &mut ViewContext<Self>)
 2799    where
 2800        I: IntoIterator<Item = (Range<S>, T)>,
 2801        S: ToOffset,
 2802        T: Into<Arc<str>>,
 2803    {
 2804        if self.read_only(cx) {
 2805            return;
 2806        }
 2807
 2808        self.buffer
 2809            .update(cx, |buffer, cx| buffer.edit(edits, None, cx));
 2810    }
 2811
 2812    pub fn edit_with_autoindent<I, S, T>(&mut self, edits: I, cx: &mut ViewContext<Self>)
 2813    where
 2814        I: IntoIterator<Item = (Range<S>, T)>,
 2815        S: ToOffset,
 2816        T: Into<Arc<str>>,
 2817    {
 2818        if self.read_only(cx) {
 2819            return;
 2820        }
 2821
 2822        self.buffer.update(cx, |buffer, cx| {
 2823            buffer.edit(edits, self.autoindent_mode.clone(), cx)
 2824        });
 2825    }
 2826
 2827    pub fn edit_with_block_indent<I, S, T>(
 2828        &mut self,
 2829        edits: I,
 2830        original_indent_columns: Vec<u32>,
 2831        cx: &mut ViewContext<Self>,
 2832    ) where
 2833        I: IntoIterator<Item = (Range<S>, T)>,
 2834        S: ToOffset,
 2835        T: Into<Arc<str>>,
 2836    {
 2837        if self.read_only(cx) {
 2838            return;
 2839        }
 2840
 2841        self.buffer.update(cx, |buffer, cx| {
 2842            buffer.edit(
 2843                edits,
 2844                Some(AutoindentMode::Block {
 2845                    original_indent_columns,
 2846                }),
 2847                cx,
 2848            )
 2849        });
 2850    }
 2851
 2852    fn select(&mut self, phase: SelectPhase, cx: &mut ViewContext<Self>) {
 2853        self.hide_context_menu(cx);
 2854
 2855        match phase {
 2856            SelectPhase::Begin {
 2857                position,
 2858                add,
 2859                click_count,
 2860            } => self.begin_selection(position, add, click_count, cx),
 2861            SelectPhase::BeginColumnar {
 2862                position,
 2863                goal_column,
 2864                reset,
 2865            } => self.begin_columnar_selection(position, goal_column, reset, cx),
 2866            SelectPhase::Extend {
 2867                position,
 2868                click_count,
 2869            } => self.extend_selection(position, click_count, cx),
 2870            SelectPhase::Update {
 2871                position,
 2872                goal_column,
 2873                scroll_delta,
 2874            } => self.update_selection(position, goal_column, scroll_delta, cx),
 2875            SelectPhase::End => self.end_selection(cx),
 2876        }
 2877    }
 2878
 2879    fn extend_selection(
 2880        &mut self,
 2881        position: DisplayPoint,
 2882        click_count: usize,
 2883        cx: &mut ViewContext<Self>,
 2884    ) {
 2885        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 2886        let tail = self.selections.newest::<usize>(cx).tail();
 2887        self.begin_selection(position, false, click_count, cx);
 2888
 2889        let position = position.to_offset(&display_map, Bias::Left);
 2890        let tail_anchor = display_map.buffer_snapshot.anchor_before(tail);
 2891
 2892        let mut pending_selection = self
 2893            .selections
 2894            .pending_anchor()
 2895            .expect("extend_selection not called with pending selection");
 2896        if position >= tail {
 2897            pending_selection.start = tail_anchor;
 2898        } else {
 2899            pending_selection.end = tail_anchor;
 2900            pending_selection.reversed = true;
 2901        }
 2902
 2903        let mut pending_mode = self.selections.pending_mode().unwrap();
 2904        match &mut pending_mode {
 2905            SelectMode::Word(range) | SelectMode::Line(range) => *range = tail_anchor..tail_anchor,
 2906            _ => {}
 2907        }
 2908
 2909        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 2910            s.set_pending(pending_selection, pending_mode)
 2911        });
 2912    }
 2913
 2914    fn begin_selection(
 2915        &mut self,
 2916        position: DisplayPoint,
 2917        add: bool,
 2918        click_count: usize,
 2919        cx: &mut ViewContext<Self>,
 2920    ) {
 2921        if !self.focus_handle.is_focused(cx) {
 2922            self.last_focused_descendant = None;
 2923            cx.focus(&self.focus_handle);
 2924        }
 2925
 2926        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 2927        let buffer = &display_map.buffer_snapshot;
 2928        let newest_selection = self.selections.newest_anchor().clone();
 2929        let position = display_map.clip_point(position, Bias::Left);
 2930
 2931        let start;
 2932        let end;
 2933        let mode;
 2934        let auto_scroll;
 2935        match click_count {
 2936            1 => {
 2937                start = buffer.anchor_before(position.to_point(&display_map));
 2938                end = start;
 2939                mode = SelectMode::Character;
 2940                auto_scroll = true;
 2941            }
 2942            2 => {
 2943                let range = movement::surrounding_word(&display_map, position);
 2944                start = buffer.anchor_before(range.start.to_point(&display_map));
 2945                end = buffer.anchor_before(range.end.to_point(&display_map));
 2946                mode = SelectMode::Word(start..end);
 2947                auto_scroll = true;
 2948            }
 2949            3 => {
 2950                let position = display_map
 2951                    .clip_point(position, Bias::Left)
 2952                    .to_point(&display_map);
 2953                let line_start = display_map.prev_line_boundary(position).0;
 2954                let next_line_start = buffer.clip_point(
 2955                    display_map.next_line_boundary(position).0 + Point::new(1, 0),
 2956                    Bias::Left,
 2957                );
 2958                start = buffer.anchor_before(line_start);
 2959                end = buffer.anchor_before(next_line_start);
 2960                mode = SelectMode::Line(start..end);
 2961                auto_scroll = true;
 2962            }
 2963            _ => {
 2964                start = buffer.anchor_before(0);
 2965                end = buffer.anchor_before(buffer.len());
 2966                mode = SelectMode::All;
 2967                auto_scroll = false;
 2968            }
 2969        }
 2970
 2971        let point_to_delete: Option<usize> = {
 2972            let selected_points: Vec<Selection<Point>> =
 2973                self.selections.disjoint_in_range(start..end, cx);
 2974
 2975            if !add || click_count > 1 {
 2976                None
 2977            } else if !selected_points.is_empty() {
 2978                Some(selected_points[0].id)
 2979            } else {
 2980                let clicked_point_already_selected =
 2981                    self.selections.disjoint.iter().find(|selection| {
 2982                        selection.start.to_point(buffer) == start.to_point(buffer)
 2983                            || selection.end.to_point(buffer) == end.to_point(buffer)
 2984                    });
 2985
 2986                clicked_point_already_selected.map(|selection| selection.id)
 2987            }
 2988        };
 2989
 2990        let selections_count = self.selections.count();
 2991
 2992        self.change_selections(auto_scroll.then(Autoscroll::newest), cx, |s| {
 2993            if let Some(point_to_delete) = point_to_delete {
 2994                s.delete(point_to_delete);
 2995
 2996                if selections_count == 1 {
 2997                    s.set_pending_anchor_range(start..end, mode);
 2998                }
 2999            } else {
 3000                if !add {
 3001                    s.clear_disjoint();
 3002                } else if click_count > 1 {
 3003                    s.delete(newest_selection.id)
 3004                }
 3005
 3006                s.set_pending_anchor_range(start..end, mode);
 3007            }
 3008        });
 3009    }
 3010
 3011    fn begin_columnar_selection(
 3012        &mut self,
 3013        position: DisplayPoint,
 3014        goal_column: u32,
 3015        reset: bool,
 3016        cx: &mut ViewContext<Self>,
 3017    ) {
 3018        if !self.focus_handle.is_focused(cx) {
 3019            self.last_focused_descendant = None;
 3020            cx.focus(&self.focus_handle);
 3021        }
 3022
 3023        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 3024
 3025        if reset {
 3026            let pointer_position = display_map
 3027                .buffer_snapshot
 3028                .anchor_before(position.to_point(&display_map));
 3029
 3030            self.change_selections(Some(Autoscroll::newest()), cx, |s| {
 3031                s.clear_disjoint();
 3032                s.set_pending_anchor_range(
 3033                    pointer_position..pointer_position,
 3034                    SelectMode::Character,
 3035                );
 3036            });
 3037        }
 3038
 3039        let tail = self.selections.newest::<Point>(cx).tail();
 3040        self.columnar_selection_tail = Some(display_map.buffer_snapshot.anchor_before(tail));
 3041
 3042        if !reset {
 3043            self.select_columns(
 3044                tail.to_display_point(&display_map),
 3045                position,
 3046                goal_column,
 3047                &display_map,
 3048                cx,
 3049            );
 3050        }
 3051    }
 3052
 3053    fn update_selection(
 3054        &mut self,
 3055        position: DisplayPoint,
 3056        goal_column: u32,
 3057        scroll_delta: gpui::Point<f32>,
 3058        cx: &mut ViewContext<Self>,
 3059    ) {
 3060        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 3061
 3062        if let Some(tail) = self.columnar_selection_tail.as_ref() {
 3063            let tail = tail.to_display_point(&display_map);
 3064            self.select_columns(tail, position, goal_column, &display_map, cx);
 3065        } else if let Some(mut pending) = self.selections.pending_anchor() {
 3066            let buffer = self.buffer.read(cx).snapshot(cx);
 3067            let head;
 3068            let tail;
 3069            let mode = self.selections.pending_mode().unwrap();
 3070            match &mode {
 3071                SelectMode::Character => {
 3072                    head = position.to_point(&display_map);
 3073                    tail = pending.tail().to_point(&buffer);
 3074                }
 3075                SelectMode::Word(original_range) => {
 3076                    let original_display_range = original_range.start.to_display_point(&display_map)
 3077                        ..original_range.end.to_display_point(&display_map);
 3078                    let original_buffer_range = original_display_range.start.to_point(&display_map)
 3079                        ..original_display_range.end.to_point(&display_map);
 3080                    if movement::is_inside_word(&display_map, position)
 3081                        || original_display_range.contains(&position)
 3082                    {
 3083                        let word_range = movement::surrounding_word(&display_map, position);
 3084                        if word_range.start < original_display_range.start {
 3085                            head = word_range.start.to_point(&display_map);
 3086                        } else {
 3087                            head = word_range.end.to_point(&display_map);
 3088                        }
 3089                    } else {
 3090                        head = position.to_point(&display_map);
 3091                    }
 3092
 3093                    if head <= original_buffer_range.start {
 3094                        tail = original_buffer_range.end;
 3095                    } else {
 3096                        tail = original_buffer_range.start;
 3097                    }
 3098                }
 3099                SelectMode::Line(original_range) => {
 3100                    let original_range = original_range.to_point(&display_map.buffer_snapshot);
 3101
 3102                    let position = display_map
 3103                        .clip_point(position, Bias::Left)
 3104                        .to_point(&display_map);
 3105                    let line_start = display_map.prev_line_boundary(position).0;
 3106                    let next_line_start = buffer.clip_point(
 3107                        display_map.next_line_boundary(position).0 + Point::new(1, 0),
 3108                        Bias::Left,
 3109                    );
 3110
 3111                    if line_start < original_range.start {
 3112                        head = line_start
 3113                    } else {
 3114                        head = next_line_start
 3115                    }
 3116
 3117                    if head <= original_range.start {
 3118                        tail = original_range.end;
 3119                    } else {
 3120                        tail = original_range.start;
 3121                    }
 3122                }
 3123                SelectMode::All => {
 3124                    return;
 3125                }
 3126            };
 3127
 3128            if head < tail {
 3129                pending.start = buffer.anchor_before(head);
 3130                pending.end = buffer.anchor_before(tail);
 3131                pending.reversed = true;
 3132            } else {
 3133                pending.start = buffer.anchor_before(tail);
 3134                pending.end = buffer.anchor_before(head);
 3135                pending.reversed = false;
 3136            }
 3137
 3138            self.change_selections(None, cx, |s| {
 3139                s.set_pending(pending, mode);
 3140            });
 3141        } else {
 3142            log::error!("update_selection dispatched with no pending selection");
 3143            return;
 3144        }
 3145
 3146        self.apply_scroll_delta(scroll_delta, cx);
 3147        cx.notify();
 3148    }
 3149
 3150    fn end_selection(&mut self, cx: &mut ViewContext<Self>) {
 3151        self.columnar_selection_tail.take();
 3152        if self.selections.pending_anchor().is_some() {
 3153            let selections = self.selections.all::<usize>(cx);
 3154            self.change_selections(None, cx, |s| {
 3155                s.select(selections);
 3156                s.clear_pending();
 3157            });
 3158        }
 3159    }
 3160
 3161    fn select_columns(
 3162        &mut self,
 3163        tail: DisplayPoint,
 3164        head: DisplayPoint,
 3165        goal_column: u32,
 3166        display_map: &DisplaySnapshot,
 3167        cx: &mut ViewContext<Self>,
 3168    ) {
 3169        let start_row = cmp::min(tail.row(), head.row());
 3170        let end_row = cmp::max(tail.row(), head.row());
 3171        let start_column = cmp::min(tail.column(), goal_column);
 3172        let end_column = cmp::max(tail.column(), goal_column);
 3173        let reversed = start_column < tail.column();
 3174
 3175        let selection_ranges = (start_row.0..=end_row.0)
 3176            .map(DisplayRow)
 3177            .filter_map(|row| {
 3178                if start_column <= display_map.line_len(row) && !display_map.is_block_line(row) {
 3179                    let start = display_map
 3180                        .clip_point(DisplayPoint::new(row, start_column), Bias::Left)
 3181                        .to_point(display_map);
 3182                    let end = display_map
 3183                        .clip_point(DisplayPoint::new(row, end_column), Bias::Right)
 3184                        .to_point(display_map);
 3185                    if reversed {
 3186                        Some(end..start)
 3187                    } else {
 3188                        Some(start..end)
 3189                    }
 3190                } else {
 3191                    None
 3192                }
 3193            })
 3194            .collect::<Vec<_>>();
 3195
 3196        self.change_selections(None, cx, |s| {
 3197            s.select_ranges(selection_ranges);
 3198        });
 3199        cx.notify();
 3200    }
 3201
 3202    pub fn has_pending_nonempty_selection(&self) -> bool {
 3203        let pending_nonempty_selection = match self.selections.pending_anchor() {
 3204            Some(Selection { start, end, .. }) => start != end,
 3205            None => false,
 3206        };
 3207
 3208        pending_nonempty_selection
 3209            || (self.columnar_selection_tail.is_some() && self.selections.disjoint.len() > 1)
 3210    }
 3211
 3212    pub fn has_pending_selection(&self) -> bool {
 3213        self.selections.pending_anchor().is_some() || self.columnar_selection_tail.is_some()
 3214    }
 3215
 3216    pub fn cancel(&mut self, _: &Cancel, cx: &mut ViewContext<Self>) {
 3217        if self.clear_expanded_diff_hunks(cx) {
 3218            cx.notify();
 3219            return;
 3220        }
 3221        if self.dismiss_menus_and_popups(true, cx) {
 3222            return;
 3223        }
 3224
 3225        if self.mode == EditorMode::Full
 3226            && self.change_selections(Some(Autoscroll::fit()), cx, |s| s.try_cancel())
 3227        {
 3228            return;
 3229        }
 3230
 3231        cx.propagate();
 3232    }
 3233
 3234    pub fn dismiss_menus_and_popups(
 3235        &mut self,
 3236        should_report_inline_completion_event: bool,
 3237        cx: &mut ViewContext<Self>,
 3238    ) -> bool {
 3239        if self.take_rename(false, cx).is_some() {
 3240            return true;
 3241        }
 3242
 3243        if hide_hover(self, cx) {
 3244            return true;
 3245        }
 3246
 3247        if self.hide_signature_help(cx, SignatureHelpHiddenBy::Escape) {
 3248            return true;
 3249        }
 3250
 3251        if self.hide_context_menu(cx).is_some() {
 3252            return true;
 3253        }
 3254
 3255        if self.mouse_context_menu.take().is_some() {
 3256            return true;
 3257        }
 3258
 3259        if self.discard_inline_completion(should_report_inline_completion_event, cx) {
 3260            return true;
 3261        }
 3262
 3263        if self.snippet_stack.pop().is_some() {
 3264            return true;
 3265        }
 3266
 3267        if self.mode == EditorMode::Full && self.active_diagnostics.is_some() {
 3268            self.dismiss_diagnostics(cx);
 3269            return true;
 3270        }
 3271
 3272        false
 3273    }
 3274
 3275    fn linked_editing_ranges_for(
 3276        &self,
 3277        selection: Range<text::Anchor>,
 3278        cx: &AppContext,
 3279    ) -> Option<HashMap<Model<Buffer>, Vec<Range<text::Anchor>>>> {
 3280        if self.linked_edit_ranges.is_empty() {
 3281            return None;
 3282        }
 3283        let ((base_range, linked_ranges), buffer_snapshot, buffer) =
 3284            selection.end.buffer_id.and_then(|end_buffer_id| {
 3285                if selection.start.buffer_id != Some(end_buffer_id) {
 3286                    return None;
 3287                }
 3288                let buffer = self.buffer.read(cx).buffer(end_buffer_id)?;
 3289                let snapshot = buffer.read(cx).snapshot();
 3290                self.linked_edit_ranges
 3291                    .get(end_buffer_id, selection.start..selection.end, &snapshot)
 3292                    .map(|ranges| (ranges, snapshot, buffer))
 3293            })?;
 3294        use text::ToOffset as TO;
 3295        // find offset from the start of current range to current cursor position
 3296        let start_byte_offset = TO::to_offset(&base_range.start, &buffer_snapshot);
 3297
 3298        let start_offset = TO::to_offset(&selection.start, &buffer_snapshot);
 3299        let start_difference = start_offset - start_byte_offset;
 3300        let end_offset = TO::to_offset(&selection.end, &buffer_snapshot);
 3301        let end_difference = end_offset - start_byte_offset;
 3302        // Current range has associated linked ranges.
 3303        let mut linked_edits = HashMap::<_, Vec<_>>::default();
 3304        for range in linked_ranges.iter() {
 3305            let start_offset = TO::to_offset(&range.start, &buffer_snapshot);
 3306            let end_offset = start_offset + end_difference;
 3307            let start_offset = start_offset + start_difference;
 3308            if start_offset > buffer_snapshot.len() || end_offset > buffer_snapshot.len() {
 3309                continue;
 3310            }
 3311            if self.selections.disjoint_anchor_ranges().iter().any(|s| {
 3312                if s.start.buffer_id != selection.start.buffer_id
 3313                    || s.end.buffer_id != selection.end.buffer_id
 3314                {
 3315                    return false;
 3316                }
 3317                TO::to_offset(&s.start.text_anchor, &buffer_snapshot) <= end_offset
 3318                    && TO::to_offset(&s.end.text_anchor, &buffer_snapshot) >= start_offset
 3319            }) {
 3320                continue;
 3321            }
 3322            let start = buffer_snapshot.anchor_after(start_offset);
 3323            let end = buffer_snapshot.anchor_after(end_offset);
 3324            linked_edits
 3325                .entry(buffer.clone())
 3326                .or_default()
 3327                .push(start..end);
 3328        }
 3329        Some(linked_edits)
 3330    }
 3331
 3332    pub fn handle_input(&mut self, text: &str, cx: &mut ViewContext<Self>) {
 3333        let text: Arc<str> = text.into();
 3334
 3335        if self.read_only(cx) {
 3336            return;
 3337        }
 3338
 3339        let selections = self.selections.all_adjusted(cx);
 3340        let mut bracket_inserted = false;
 3341        let mut edits = Vec::new();
 3342        let mut linked_edits = HashMap::<_, Vec<_>>::default();
 3343        let mut new_selections = Vec::with_capacity(selections.len());
 3344        let mut new_autoclose_regions = Vec::new();
 3345        let snapshot = self.buffer.read(cx).read(cx);
 3346
 3347        for (selection, autoclose_region) in
 3348            self.selections_with_autoclose_regions(selections, &snapshot)
 3349        {
 3350            if let Some(scope) = snapshot.language_scope_at(selection.head()) {
 3351                // Determine if the inserted text matches the opening or closing
 3352                // bracket of any of this language's bracket pairs.
 3353                let mut bracket_pair = None;
 3354                let mut is_bracket_pair_start = false;
 3355                let mut is_bracket_pair_end = false;
 3356                if !text.is_empty() {
 3357                    // `text` can be empty when a user is using IME (e.g. Chinese Wubi Simplified)
 3358                    //  and they are removing the character that triggered IME popup.
 3359                    for (pair, enabled) in scope.brackets() {
 3360                        if !pair.close && !pair.surround {
 3361                            continue;
 3362                        }
 3363
 3364                        if enabled && pair.start.ends_with(text.as_ref()) {
 3365                            let prefix_len = pair.start.len() - text.len();
 3366                            let preceding_text_matches_prefix = prefix_len == 0
 3367                                || (selection.start.column >= (prefix_len as u32)
 3368                                    && snapshot.contains_str_at(
 3369                                        Point::new(
 3370                                            selection.start.row,
 3371                                            selection.start.column - (prefix_len as u32),
 3372                                        ),
 3373                                        &pair.start[..prefix_len],
 3374                                    ));
 3375                            if preceding_text_matches_prefix {
 3376                                bracket_pair = Some(pair.clone());
 3377                                is_bracket_pair_start = true;
 3378                                break;
 3379                            }
 3380                        }
 3381                        if pair.end.as_str() == text.as_ref() {
 3382                            bracket_pair = Some(pair.clone());
 3383                            is_bracket_pair_end = true;
 3384                            break;
 3385                        }
 3386                    }
 3387                }
 3388
 3389                if let Some(bracket_pair) = bracket_pair {
 3390                    let snapshot_settings = snapshot.settings_at(selection.start, cx);
 3391                    let autoclose = self.use_autoclose && snapshot_settings.use_autoclose;
 3392                    let auto_surround =
 3393                        self.use_auto_surround && snapshot_settings.use_auto_surround;
 3394                    if selection.is_empty() {
 3395                        if is_bracket_pair_start {
 3396                            // If the inserted text is a suffix of an opening bracket and the
 3397                            // selection is preceded by the rest of the opening bracket, then
 3398                            // insert the closing bracket.
 3399                            let following_text_allows_autoclose = snapshot
 3400                                .chars_at(selection.start)
 3401                                .next()
 3402                                .map_or(true, |c| scope.should_autoclose_before(c));
 3403
 3404                            let is_closing_quote = if bracket_pair.end == bracket_pair.start
 3405                                && bracket_pair.start.len() == 1
 3406                            {
 3407                                let target = bracket_pair.start.chars().next().unwrap();
 3408                                let current_line_count = snapshot
 3409                                    .reversed_chars_at(selection.start)
 3410                                    .take_while(|&c| c != '\n')
 3411                                    .filter(|&c| c == target)
 3412                                    .count();
 3413                                current_line_count % 2 == 1
 3414                            } else {
 3415                                false
 3416                            };
 3417
 3418                            if autoclose
 3419                                && bracket_pair.close
 3420                                && following_text_allows_autoclose
 3421                                && !is_closing_quote
 3422                            {
 3423                                let anchor = snapshot.anchor_before(selection.end);
 3424                                new_selections.push((selection.map(|_| anchor), text.len()));
 3425                                new_autoclose_regions.push((
 3426                                    anchor,
 3427                                    text.len(),
 3428                                    selection.id,
 3429                                    bracket_pair.clone(),
 3430                                ));
 3431                                edits.push((
 3432                                    selection.range(),
 3433                                    format!("{}{}", text, bracket_pair.end).into(),
 3434                                ));
 3435                                bracket_inserted = true;
 3436                                continue;
 3437                            }
 3438                        }
 3439
 3440                        if let Some(region) = autoclose_region {
 3441                            // If the selection is followed by an auto-inserted closing bracket,
 3442                            // then don't insert that closing bracket again; just move the selection
 3443                            // past the closing bracket.
 3444                            let should_skip = selection.end == region.range.end.to_point(&snapshot)
 3445                                && text.as_ref() == region.pair.end.as_str();
 3446                            if should_skip {
 3447                                let anchor = snapshot.anchor_after(selection.end);
 3448                                new_selections
 3449                                    .push((selection.map(|_| anchor), region.pair.end.len()));
 3450                                continue;
 3451                            }
 3452                        }
 3453
 3454                        let always_treat_brackets_as_autoclosed = snapshot
 3455                            .settings_at(selection.start, cx)
 3456                            .always_treat_brackets_as_autoclosed;
 3457                        if always_treat_brackets_as_autoclosed
 3458                            && is_bracket_pair_end
 3459                            && snapshot.contains_str_at(selection.end, text.as_ref())
 3460                        {
 3461                            // Otherwise, when `always_treat_brackets_as_autoclosed` is set to `true
 3462                            // and the inserted text is a closing bracket and the selection is followed
 3463                            // by the closing bracket then move the selection past the closing bracket.
 3464                            let anchor = snapshot.anchor_after(selection.end);
 3465                            new_selections.push((selection.map(|_| anchor), text.len()));
 3466                            continue;
 3467                        }
 3468                    }
 3469                    // If an opening bracket is 1 character long and is typed while
 3470                    // text is selected, then surround that text with the bracket pair.
 3471                    else if auto_surround
 3472                        && bracket_pair.surround
 3473                        && is_bracket_pair_start
 3474                        && bracket_pair.start.chars().count() == 1
 3475                    {
 3476                        edits.push((selection.start..selection.start, text.clone()));
 3477                        edits.push((
 3478                            selection.end..selection.end,
 3479                            bracket_pair.end.as_str().into(),
 3480                        ));
 3481                        bracket_inserted = true;
 3482                        new_selections.push((
 3483                            Selection {
 3484                                id: selection.id,
 3485                                start: snapshot.anchor_after(selection.start),
 3486                                end: snapshot.anchor_before(selection.end),
 3487                                reversed: selection.reversed,
 3488                                goal: selection.goal,
 3489                            },
 3490                            0,
 3491                        ));
 3492                        continue;
 3493                    }
 3494                }
 3495            }
 3496
 3497            if self.auto_replace_emoji_shortcode
 3498                && selection.is_empty()
 3499                && text.as_ref().ends_with(':')
 3500            {
 3501                if let Some(possible_emoji_short_code) =
 3502                    Self::find_possible_emoji_shortcode_at_position(&snapshot, selection.start)
 3503                {
 3504                    if !possible_emoji_short_code.is_empty() {
 3505                        if let Some(emoji) = emojis::get_by_shortcode(&possible_emoji_short_code) {
 3506                            let emoji_shortcode_start = Point::new(
 3507                                selection.start.row,
 3508                                selection.start.column - possible_emoji_short_code.len() as u32 - 1,
 3509                            );
 3510
 3511                            // Remove shortcode from buffer
 3512                            edits.push((
 3513                                emoji_shortcode_start..selection.start,
 3514                                "".to_string().into(),
 3515                            ));
 3516                            new_selections.push((
 3517                                Selection {
 3518                                    id: selection.id,
 3519                                    start: snapshot.anchor_after(emoji_shortcode_start),
 3520                                    end: snapshot.anchor_before(selection.start),
 3521                                    reversed: selection.reversed,
 3522                                    goal: selection.goal,
 3523                                },
 3524                                0,
 3525                            ));
 3526
 3527                            // Insert emoji
 3528                            let selection_start_anchor = snapshot.anchor_after(selection.start);
 3529                            new_selections.push((selection.map(|_| selection_start_anchor), 0));
 3530                            edits.push((selection.start..selection.end, emoji.to_string().into()));
 3531
 3532                            continue;
 3533                        }
 3534                    }
 3535                }
 3536            }
 3537
 3538            // If not handling any auto-close operation, then just replace the selected
 3539            // text with the given input and move the selection to the end of the
 3540            // newly inserted text.
 3541            let anchor = snapshot.anchor_after(selection.end);
 3542            if !self.linked_edit_ranges.is_empty() {
 3543                let start_anchor = snapshot.anchor_before(selection.start);
 3544
 3545                let is_word_char = text.chars().next().map_or(true, |char| {
 3546                    let classifier = snapshot.char_classifier_at(start_anchor.to_offset(&snapshot));
 3547                    classifier.is_word(char)
 3548                });
 3549
 3550                if is_word_char {
 3551                    if let Some(ranges) = self
 3552                        .linked_editing_ranges_for(start_anchor.text_anchor..anchor.text_anchor, cx)
 3553                    {
 3554                        for (buffer, edits) in ranges {
 3555                            linked_edits
 3556                                .entry(buffer.clone())
 3557                                .or_default()
 3558                                .extend(edits.into_iter().map(|range| (range, text.clone())));
 3559                        }
 3560                    }
 3561                }
 3562            }
 3563
 3564            new_selections.push((selection.map(|_| anchor), 0));
 3565            edits.push((selection.start..selection.end, text.clone()));
 3566        }
 3567
 3568        drop(snapshot);
 3569
 3570        self.transact(cx, |this, cx| {
 3571            this.buffer.update(cx, |buffer, cx| {
 3572                buffer.edit(edits, this.autoindent_mode.clone(), cx);
 3573            });
 3574            for (buffer, edits) in linked_edits {
 3575                buffer.update(cx, |buffer, cx| {
 3576                    let snapshot = buffer.snapshot();
 3577                    let edits = edits
 3578                        .into_iter()
 3579                        .map(|(range, text)| {
 3580                            use text::ToPoint as TP;
 3581                            let end_point = TP::to_point(&range.end, &snapshot);
 3582                            let start_point = TP::to_point(&range.start, &snapshot);
 3583                            (start_point..end_point, text)
 3584                        })
 3585                        .sorted_by_key(|(range, _)| range.start)
 3586                        .collect::<Vec<_>>();
 3587                    buffer.edit(edits, None, cx);
 3588                })
 3589            }
 3590            let new_anchor_selections = new_selections.iter().map(|e| &e.0);
 3591            let new_selection_deltas = new_selections.iter().map(|e| e.1);
 3592            let map = this.display_map.update(cx, |map, cx| map.snapshot(cx));
 3593            let new_selections = resolve_selections::<usize, _>(new_anchor_selections, &map)
 3594                .zip(new_selection_deltas)
 3595                .map(|(selection, delta)| Selection {
 3596                    id: selection.id,
 3597                    start: selection.start + delta,
 3598                    end: selection.end + delta,
 3599                    reversed: selection.reversed,
 3600                    goal: SelectionGoal::None,
 3601                })
 3602                .collect::<Vec<_>>();
 3603
 3604            let mut i = 0;
 3605            for (position, delta, selection_id, pair) in new_autoclose_regions {
 3606                let position = position.to_offset(&map.buffer_snapshot) + delta;
 3607                let start = map.buffer_snapshot.anchor_before(position);
 3608                let end = map.buffer_snapshot.anchor_after(position);
 3609                while let Some(existing_state) = this.autoclose_regions.get(i) {
 3610                    match existing_state.range.start.cmp(&start, &map.buffer_snapshot) {
 3611                        Ordering::Less => i += 1,
 3612                        Ordering::Greater => break,
 3613                        Ordering::Equal => {
 3614                            match end.cmp(&existing_state.range.end, &map.buffer_snapshot) {
 3615                                Ordering::Less => i += 1,
 3616                                Ordering::Equal => break,
 3617                                Ordering::Greater => break,
 3618                            }
 3619                        }
 3620                    }
 3621                }
 3622                this.autoclose_regions.insert(
 3623                    i,
 3624                    AutocloseRegion {
 3625                        selection_id,
 3626                        range: start..end,
 3627                        pair,
 3628                    },
 3629                );
 3630            }
 3631
 3632            let had_active_inline_completion = this.has_active_inline_completion(cx);
 3633            this.change_selections_inner(Some(Autoscroll::fit()), false, cx, |s| {
 3634                s.select(new_selections)
 3635            });
 3636
 3637            if !bracket_inserted {
 3638                if let Some(on_type_format_task) =
 3639                    this.trigger_on_type_formatting(text.to_string(), cx)
 3640                {
 3641                    on_type_format_task.detach_and_log_err(cx);
 3642                }
 3643            }
 3644
 3645            let editor_settings = EditorSettings::get_global(cx);
 3646            if bracket_inserted
 3647                && (editor_settings.auto_signature_help
 3648                    || editor_settings.show_signature_help_after_edits)
 3649            {
 3650                this.show_signature_help(&ShowSignatureHelp, cx);
 3651            }
 3652
 3653            let trigger_in_words = !had_active_inline_completion;
 3654            this.trigger_completion_on_input(&text, trigger_in_words, cx);
 3655            linked_editing_ranges::refresh_linked_ranges(this, cx);
 3656            this.refresh_inline_completion(true, false, cx);
 3657        });
 3658    }
 3659
 3660    fn find_possible_emoji_shortcode_at_position(
 3661        snapshot: &MultiBufferSnapshot,
 3662        position: Point,
 3663    ) -> Option<String> {
 3664        let mut chars = Vec::new();
 3665        let mut found_colon = false;
 3666        for char in snapshot.reversed_chars_at(position).take(100) {
 3667            // Found a possible emoji shortcode in the middle of the buffer
 3668            if found_colon {
 3669                if char.is_whitespace() {
 3670                    chars.reverse();
 3671                    return Some(chars.iter().collect());
 3672                }
 3673                // If the previous character is not a whitespace, we are in the middle of a word
 3674                // and we only want to complete the shortcode if the word is made up of other emojis
 3675                let mut containing_word = String::new();
 3676                for ch in snapshot
 3677                    .reversed_chars_at(position)
 3678                    .skip(chars.len() + 1)
 3679                    .take(100)
 3680                {
 3681                    if ch.is_whitespace() {
 3682                        break;
 3683                    }
 3684                    containing_word.push(ch);
 3685                }
 3686                let containing_word = containing_word.chars().rev().collect::<String>();
 3687                if util::word_consists_of_emojis(containing_word.as_str()) {
 3688                    chars.reverse();
 3689                    return Some(chars.iter().collect());
 3690                }
 3691            }
 3692
 3693            if char.is_whitespace() || !char.is_ascii() {
 3694                return None;
 3695            }
 3696            if char == ':' {
 3697                found_colon = true;
 3698            } else {
 3699                chars.push(char);
 3700            }
 3701        }
 3702        // Found a possible emoji shortcode at the beginning of the buffer
 3703        chars.reverse();
 3704        Some(chars.iter().collect())
 3705    }
 3706
 3707    pub fn newline(&mut self, _: &Newline, cx: &mut ViewContext<Self>) {
 3708        self.transact(cx, |this, cx| {
 3709            let (edits, selection_fixup_info): (Vec<_>, Vec<_>) = {
 3710                let selections = this.selections.all::<usize>(cx);
 3711                let multi_buffer = this.buffer.read(cx);
 3712                let buffer = multi_buffer.snapshot(cx);
 3713                selections
 3714                    .iter()
 3715                    .map(|selection| {
 3716                        let start_point = selection.start.to_point(&buffer);
 3717                        let mut indent =
 3718                            buffer.indent_size_for_line(MultiBufferRow(start_point.row));
 3719                        indent.len = cmp::min(indent.len, start_point.column);
 3720                        let start = selection.start;
 3721                        let end = selection.end;
 3722                        let selection_is_empty = start == end;
 3723                        let language_scope = buffer.language_scope_at(start);
 3724                        let (comment_delimiter, insert_extra_newline) = if let Some(language) =
 3725                            &language_scope
 3726                        {
 3727                            let leading_whitespace_len = buffer
 3728                                .reversed_chars_at(start)
 3729                                .take_while(|c| c.is_whitespace() && *c != '\n')
 3730                                .map(|c| c.len_utf8())
 3731                                .sum::<usize>();
 3732
 3733                            let trailing_whitespace_len = buffer
 3734                                .chars_at(end)
 3735                                .take_while(|c| c.is_whitespace() && *c != '\n')
 3736                                .map(|c| c.len_utf8())
 3737                                .sum::<usize>();
 3738
 3739                            let insert_extra_newline =
 3740                                language.brackets().any(|(pair, enabled)| {
 3741                                    let pair_start = pair.start.trim_end();
 3742                                    let pair_end = pair.end.trim_start();
 3743
 3744                                    enabled
 3745                                        && pair.newline
 3746                                        && buffer.contains_str_at(
 3747                                            end + trailing_whitespace_len,
 3748                                            pair_end,
 3749                                        )
 3750                                        && buffer.contains_str_at(
 3751                                            (start - leading_whitespace_len)
 3752                                                .saturating_sub(pair_start.len()),
 3753                                            pair_start,
 3754                                        )
 3755                                });
 3756
 3757                            // Comment extension on newline is allowed only for cursor selections
 3758                            let comment_delimiter = maybe!({
 3759                                if !selection_is_empty {
 3760                                    return None;
 3761                                }
 3762
 3763                                if !multi_buffer.settings_at(0, cx).extend_comment_on_newline {
 3764                                    return None;
 3765                                }
 3766
 3767                                let delimiters = language.line_comment_prefixes();
 3768                                let max_len_of_delimiter =
 3769                                    delimiters.iter().map(|delimiter| delimiter.len()).max()?;
 3770                                let (snapshot, range) =
 3771                                    buffer.buffer_line_for_row(MultiBufferRow(start_point.row))?;
 3772
 3773                                let mut index_of_first_non_whitespace = 0;
 3774                                let comment_candidate = snapshot
 3775                                    .chars_for_range(range)
 3776                                    .skip_while(|c| {
 3777                                        let should_skip = c.is_whitespace();
 3778                                        if should_skip {
 3779                                            index_of_first_non_whitespace += 1;
 3780                                        }
 3781                                        should_skip
 3782                                    })
 3783                                    .take(max_len_of_delimiter)
 3784                                    .collect::<String>();
 3785                                let comment_prefix = delimiters.iter().find(|comment_prefix| {
 3786                                    comment_candidate.starts_with(comment_prefix.as_ref())
 3787                                })?;
 3788                                let cursor_is_placed_after_comment_marker =
 3789                                    index_of_first_non_whitespace + comment_prefix.len()
 3790                                        <= start_point.column as usize;
 3791                                if cursor_is_placed_after_comment_marker {
 3792                                    Some(comment_prefix.clone())
 3793                                } else {
 3794                                    None
 3795                                }
 3796                            });
 3797                            (comment_delimiter, insert_extra_newline)
 3798                        } else {
 3799                            (None, false)
 3800                        };
 3801
 3802                        let capacity_for_delimiter = comment_delimiter
 3803                            .as_deref()
 3804                            .map(str::len)
 3805                            .unwrap_or_default();
 3806                        let mut new_text =
 3807                            String::with_capacity(1 + capacity_for_delimiter + indent.len as usize);
 3808                        new_text.push('\n');
 3809                        new_text.extend(indent.chars());
 3810                        if let Some(delimiter) = &comment_delimiter {
 3811                            new_text.push_str(delimiter);
 3812                        }
 3813                        if insert_extra_newline {
 3814                            new_text = new_text.repeat(2);
 3815                        }
 3816
 3817                        let anchor = buffer.anchor_after(end);
 3818                        let new_selection = selection.map(|_| anchor);
 3819                        (
 3820                            (start..end, new_text),
 3821                            (insert_extra_newline, new_selection),
 3822                        )
 3823                    })
 3824                    .unzip()
 3825            };
 3826
 3827            this.edit_with_autoindent(edits, cx);
 3828            let buffer = this.buffer.read(cx).snapshot(cx);
 3829            let new_selections = selection_fixup_info
 3830                .into_iter()
 3831                .map(|(extra_newline_inserted, new_selection)| {
 3832                    let mut cursor = new_selection.end.to_point(&buffer);
 3833                    if extra_newline_inserted {
 3834                        cursor.row -= 1;
 3835                        cursor.column = buffer.line_len(MultiBufferRow(cursor.row));
 3836                    }
 3837                    new_selection.map(|_| cursor)
 3838                })
 3839                .collect();
 3840
 3841            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(new_selections));
 3842            this.refresh_inline_completion(true, false, cx);
 3843        });
 3844    }
 3845
 3846    pub fn newline_above(&mut self, _: &NewlineAbove, cx: &mut ViewContext<Self>) {
 3847        let buffer = self.buffer.read(cx);
 3848        let snapshot = buffer.snapshot(cx);
 3849
 3850        let mut edits = Vec::new();
 3851        let mut rows = Vec::new();
 3852
 3853        for (rows_inserted, selection) in self.selections.all_adjusted(cx).into_iter().enumerate() {
 3854            let cursor = selection.head();
 3855            let row = cursor.row;
 3856
 3857            let start_of_line = snapshot.clip_point(Point::new(row, 0), Bias::Left);
 3858
 3859            let newline = "\n".to_string();
 3860            edits.push((start_of_line..start_of_line, newline));
 3861
 3862            rows.push(row + rows_inserted as u32);
 3863        }
 3864
 3865        self.transact(cx, |editor, cx| {
 3866            editor.edit(edits, cx);
 3867
 3868            editor.change_selections(Some(Autoscroll::fit()), cx, |s| {
 3869                let mut index = 0;
 3870                s.move_cursors_with(|map, _, _| {
 3871                    let row = rows[index];
 3872                    index += 1;
 3873
 3874                    let point = Point::new(row, 0);
 3875                    let boundary = map.next_line_boundary(point).1;
 3876                    let clipped = map.clip_point(boundary, Bias::Left);
 3877
 3878                    (clipped, SelectionGoal::None)
 3879                });
 3880            });
 3881
 3882            let mut indent_edits = Vec::new();
 3883            let multibuffer_snapshot = editor.buffer.read(cx).snapshot(cx);
 3884            for row in rows {
 3885                let indents = multibuffer_snapshot.suggested_indents(row..row + 1, cx);
 3886                for (row, indent) in indents {
 3887                    if indent.len == 0 {
 3888                        continue;
 3889                    }
 3890
 3891                    let text = match indent.kind {
 3892                        IndentKind::Space => " ".repeat(indent.len as usize),
 3893                        IndentKind::Tab => "\t".repeat(indent.len as usize),
 3894                    };
 3895                    let point = Point::new(row.0, 0);
 3896                    indent_edits.push((point..point, text));
 3897                }
 3898            }
 3899            editor.edit(indent_edits, cx);
 3900        });
 3901    }
 3902
 3903    pub fn newline_below(&mut self, _: &NewlineBelow, cx: &mut ViewContext<Self>) {
 3904        let buffer = self.buffer.read(cx);
 3905        let snapshot = buffer.snapshot(cx);
 3906
 3907        let mut edits = Vec::new();
 3908        let mut rows = Vec::new();
 3909        let mut rows_inserted = 0;
 3910
 3911        for selection in self.selections.all_adjusted(cx) {
 3912            let cursor = selection.head();
 3913            let row = cursor.row;
 3914
 3915            let point = Point::new(row + 1, 0);
 3916            let start_of_line = snapshot.clip_point(point, Bias::Left);
 3917
 3918            let newline = "\n".to_string();
 3919            edits.push((start_of_line..start_of_line, newline));
 3920
 3921            rows_inserted += 1;
 3922            rows.push(row + rows_inserted);
 3923        }
 3924
 3925        self.transact(cx, |editor, cx| {
 3926            editor.edit(edits, cx);
 3927
 3928            editor.change_selections(Some(Autoscroll::fit()), cx, |s| {
 3929                let mut index = 0;
 3930                s.move_cursors_with(|map, _, _| {
 3931                    let row = rows[index];
 3932                    index += 1;
 3933
 3934                    let point = Point::new(row, 0);
 3935                    let boundary = map.next_line_boundary(point).1;
 3936                    let clipped = map.clip_point(boundary, Bias::Left);
 3937
 3938                    (clipped, SelectionGoal::None)
 3939                });
 3940            });
 3941
 3942            let mut indent_edits = Vec::new();
 3943            let multibuffer_snapshot = editor.buffer.read(cx).snapshot(cx);
 3944            for row in rows {
 3945                let indents = multibuffer_snapshot.suggested_indents(row..row + 1, cx);
 3946                for (row, indent) in indents {
 3947                    if indent.len == 0 {
 3948                        continue;
 3949                    }
 3950
 3951                    let text = match indent.kind {
 3952                        IndentKind::Space => " ".repeat(indent.len as usize),
 3953                        IndentKind::Tab => "\t".repeat(indent.len as usize),
 3954                    };
 3955                    let point = Point::new(row.0, 0);
 3956                    indent_edits.push((point..point, text));
 3957                }
 3958            }
 3959            editor.edit(indent_edits, cx);
 3960        });
 3961    }
 3962
 3963    pub fn insert(&mut self, text: &str, cx: &mut ViewContext<Self>) {
 3964        let autoindent = text.is_empty().not().then(|| AutoindentMode::Block {
 3965            original_indent_columns: Vec::new(),
 3966        });
 3967        self.insert_with_autoindent_mode(text, autoindent, cx);
 3968    }
 3969
 3970    fn insert_with_autoindent_mode(
 3971        &mut self,
 3972        text: &str,
 3973        autoindent_mode: Option<AutoindentMode>,
 3974        cx: &mut ViewContext<Self>,
 3975    ) {
 3976        if self.read_only(cx) {
 3977            return;
 3978        }
 3979
 3980        let text: Arc<str> = text.into();
 3981        self.transact(cx, |this, cx| {
 3982            let old_selections = this.selections.all_adjusted(cx);
 3983            let selection_anchors = this.buffer.update(cx, |buffer, cx| {
 3984                let anchors = {
 3985                    let snapshot = buffer.read(cx);
 3986                    old_selections
 3987                        .iter()
 3988                        .map(|s| {
 3989                            let anchor = snapshot.anchor_after(s.head());
 3990                            s.map(|_| anchor)
 3991                        })
 3992                        .collect::<Vec<_>>()
 3993                };
 3994                buffer.edit(
 3995                    old_selections
 3996                        .iter()
 3997                        .map(|s| (s.start..s.end, text.clone())),
 3998                    autoindent_mode,
 3999                    cx,
 4000                );
 4001                anchors
 4002            });
 4003
 4004            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 4005                s.select_anchors(selection_anchors);
 4006            })
 4007        });
 4008    }
 4009
 4010    fn trigger_completion_on_input(
 4011        &mut self,
 4012        text: &str,
 4013        trigger_in_words: bool,
 4014        cx: &mut ViewContext<Self>,
 4015    ) {
 4016        if self.is_completion_trigger(text, trigger_in_words, cx) {
 4017            self.show_completions(
 4018                &ShowCompletions {
 4019                    trigger: Some(text.to_owned()).filter(|x| !x.is_empty()),
 4020                },
 4021                cx,
 4022            );
 4023        } else {
 4024            self.hide_context_menu(cx);
 4025        }
 4026    }
 4027
 4028    fn is_completion_trigger(
 4029        &self,
 4030        text: &str,
 4031        trigger_in_words: bool,
 4032        cx: &mut ViewContext<Self>,
 4033    ) -> bool {
 4034        let position = self.selections.newest_anchor().head();
 4035        let multibuffer = self.buffer.read(cx);
 4036        let Some(buffer) = position
 4037            .buffer_id
 4038            .and_then(|buffer_id| multibuffer.buffer(buffer_id).clone())
 4039        else {
 4040            return false;
 4041        };
 4042
 4043        if let Some(completion_provider) = &self.completion_provider {
 4044            completion_provider.is_completion_trigger(
 4045                &buffer,
 4046                position.text_anchor,
 4047                text,
 4048                trigger_in_words,
 4049                cx,
 4050            )
 4051        } else {
 4052            false
 4053        }
 4054    }
 4055
 4056    /// If any empty selections is touching the start of its innermost containing autoclose
 4057    /// region, expand it to select the brackets.
 4058    fn select_autoclose_pair(&mut self, cx: &mut ViewContext<Self>) {
 4059        let selections = self.selections.all::<usize>(cx);
 4060        let buffer = self.buffer.read(cx).read(cx);
 4061        let new_selections = self
 4062            .selections_with_autoclose_regions(selections, &buffer)
 4063            .map(|(mut selection, region)| {
 4064                if !selection.is_empty() {
 4065                    return selection;
 4066                }
 4067
 4068                if let Some(region) = region {
 4069                    let mut range = region.range.to_offset(&buffer);
 4070                    if selection.start == range.start && range.start >= region.pair.start.len() {
 4071                        range.start -= region.pair.start.len();
 4072                        if buffer.contains_str_at(range.start, &region.pair.start)
 4073                            && buffer.contains_str_at(range.end, &region.pair.end)
 4074                        {
 4075                            range.end += region.pair.end.len();
 4076                            selection.start = range.start;
 4077                            selection.end = range.end;
 4078
 4079                            return selection;
 4080                        }
 4081                    }
 4082                }
 4083
 4084                let always_treat_brackets_as_autoclosed = buffer
 4085                    .settings_at(selection.start, cx)
 4086                    .always_treat_brackets_as_autoclosed;
 4087
 4088                if !always_treat_brackets_as_autoclosed {
 4089                    return selection;
 4090                }
 4091
 4092                if let Some(scope) = buffer.language_scope_at(selection.start) {
 4093                    for (pair, enabled) in scope.brackets() {
 4094                        if !enabled || !pair.close {
 4095                            continue;
 4096                        }
 4097
 4098                        if buffer.contains_str_at(selection.start, &pair.end) {
 4099                            let pair_start_len = pair.start.len();
 4100                            if buffer.contains_str_at(selection.start - pair_start_len, &pair.start)
 4101                            {
 4102                                selection.start -= pair_start_len;
 4103                                selection.end += pair.end.len();
 4104
 4105                                return selection;
 4106                            }
 4107                        }
 4108                    }
 4109                }
 4110
 4111                selection
 4112            })
 4113            .collect();
 4114
 4115        drop(buffer);
 4116        self.change_selections(None, cx, |selections| selections.select(new_selections));
 4117    }
 4118
 4119    /// Iterate the given selections, and for each one, find the smallest surrounding
 4120    /// autoclose region. This uses the ordering of the selections and the autoclose
 4121    /// regions to avoid repeated comparisons.
 4122    fn selections_with_autoclose_regions<'a, D: ToOffset + Clone>(
 4123        &'a self,
 4124        selections: impl IntoIterator<Item = Selection<D>>,
 4125        buffer: &'a MultiBufferSnapshot,
 4126    ) -> impl Iterator<Item = (Selection<D>, Option<&'a AutocloseRegion>)> {
 4127        let mut i = 0;
 4128        let mut regions = self.autoclose_regions.as_slice();
 4129        selections.into_iter().map(move |selection| {
 4130            let range = selection.start.to_offset(buffer)..selection.end.to_offset(buffer);
 4131
 4132            let mut enclosing = None;
 4133            while let Some(pair_state) = regions.get(i) {
 4134                if pair_state.range.end.to_offset(buffer) < range.start {
 4135                    regions = &regions[i + 1..];
 4136                    i = 0;
 4137                } else if pair_state.range.start.to_offset(buffer) > range.end {
 4138                    break;
 4139                } else {
 4140                    if pair_state.selection_id == selection.id {
 4141                        enclosing = Some(pair_state);
 4142                    }
 4143                    i += 1;
 4144                }
 4145            }
 4146
 4147            (selection, enclosing)
 4148        })
 4149    }
 4150
 4151    /// Remove any autoclose regions that no longer contain their selection.
 4152    fn invalidate_autoclose_regions(
 4153        &mut self,
 4154        mut selections: &[Selection<Anchor>],
 4155        buffer: &MultiBufferSnapshot,
 4156    ) {
 4157        self.autoclose_regions.retain(|state| {
 4158            let mut i = 0;
 4159            while let Some(selection) = selections.get(i) {
 4160                if selection.end.cmp(&state.range.start, buffer).is_lt() {
 4161                    selections = &selections[1..];
 4162                    continue;
 4163                }
 4164                if selection.start.cmp(&state.range.end, buffer).is_gt() {
 4165                    break;
 4166                }
 4167                if selection.id == state.selection_id {
 4168                    return true;
 4169                } else {
 4170                    i += 1;
 4171                }
 4172            }
 4173            false
 4174        });
 4175    }
 4176
 4177    fn completion_query(buffer: &MultiBufferSnapshot, position: impl ToOffset) -> Option<String> {
 4178        let offset = position.to_offset(buffer);
 4179        let (word_range, kind) = buffer.surrounding_word(offset, true);
 4180        if offset > word_range.start && kind == Some(CharKind::Word) {
 4181            Some(
 4182                buffer
 4183                    .text_for_range(word_range.start..offset)
 4184                    .collect::<String>(),
 4185            )
 4186        } else {
 4187            None
 4188        }
 4189    }
 4190
 4191    pub fn toggle_inlay_hints(&mut self, _: &ToggleInlayHints, cx: &mut ViewContext<Self>) {
 4192        self.refresh_inlay_hints(
 4193            InlayHintRefreshReason::Toggle(!self.inlay_hint_cache.enabled),
 4194            cx,
 4195        );
 4196    }
 4197
 4198    pub fn inlay_hints_enabled(&self) -> bool {
 4199        self.inlay_hint_cache.enabled
 4200    }
 4201
 4202    fn refresh_inlay_hints(&mut self, reason: InlayHintRefreshReason, cx: &mut ViewContext<Self>) {
 4203        if self.semantics_provider.is_none() || self.mode != EditorMode::Full {
 4204            return;
 4205        }
 4206
 4207        let reason_description = reason.description();
 4208        let ignore_debounce = matches!(
 4209            reason,
 4210            InlayHintRefreshReason::SettingsChange(_)
 4211                | InlayHintRefreshReason::Toggle(_)
 4212                | InlayHintRefreshReason::ExcerptsRemoved(_)
 4213        );
 4214        let (invalidate_cache, required_languages) = match reason {
 4215            InlayHintRefreshReason::Toggle(enabled) => {
 4216                self.inlay_hint_cache.enabled = enabled;
 4217                if enabled {
 4218                    (InvalidationStrategy::RefreshRequested, None)
 4219                } else {
 4220                    self.inlay_hint_cache.clear();
 4221                    self.splice_inlays(
 4222                        self.visible_inlay_hints(cx)
 4223                            .iter()
 4224                            .map(|inlay| inlay.id)
 4225                            .collect(),
 4226                        Vec::new(),
 4227                        cx,
 4228                    );
 4229                    return;
 4230                }
 4231            }
 4232            InlayHintRefreshReason::SettingsChange(new_settings) => {
 4233                match self.inlay_hint_cache.update_settings(
 4234                    &self.buffer,
 4235                    new_settings,
 4236                    self.visible_inlay_hints(cx),
 4237                    cx,
 4238                ) {
 4239                    ControlFlow::Break(Some(InlaySplice {
 4240                        to_remove,
 4241                        to_insert,
 4242                    })) => {
 4243                        self.splice_inlays(to_remove, to_insert, cx);
 4244                        return;
 4245                    }
 4246                    ControlFlow::Break(None) => return,
 4247                    ControlFlow::Continue(()) => (InvalidationStrategy::RefreshRequested, None),
 4248                }
 4249            }
 4250            InlayHintRefreshReason::ExcerptsRemoved(excerpts_removed) => {
 4251                if let Some(InlaySplice {
 4252                    to_remove,
 4253                    to_insert,
 4254                }) = self.inlay_hint_cache.remove_excerpts(excerpts_removed)
 4255                {
 4256                    self.splice_inlays(to_remove, to_insert, cx);
 4257                }
 4258                return;
 4259            }
 4260            InlayHintRefreshReason::NewLinesShown => (InvalidationStrategy::None, None),
 4261            InlayHintRefreshReason::BufferEdited(buffer_languages) => {
 4262                (InvalidationStrategy::BufferEdited, Some(buffer_languages))
 4263            }
 4264            InlayHintRefreshReason::RefreshRequested => {
 4265                (InvalidationStrategy::RefreshRequested, None)
 4266            }
 4267        };
 4268
 4269        if let Some(InlaySplice {
 4270            to_remove,
 4271            to_insert,
 4272        }) = self.inlay_hint_cache.spawn_hint_refresh(
 4273            reason_description,
 4274            self.excerpts_for_inlay_hints_query(required_languages.as_ref(), cx),
 4275            invalidate_cache,
 4276            ignore_debounce,
 4277            cx,
 4278        ) {
 4279            self.splice_inlays(to_remove, to_insert, cx);
 4280        }
 4281    }
 4282
 4283    fn visible_inlay_hints(&self, cx: &ViewContext<'_, Editor>) -> Vec<Inlay> {
 4284        self.display_map
 4285            .read(cx)
 4286            .current_inlays()
 4287            .filter(move |inlay| matches!(inlay.id, InlayId::Hint(_)))
 4288            .cloned()
 4289            .collect()
 4290    }
 4291
 4292    pub fn excerpts_for_inlay_hints_query(
 4293        &self,
 4294        restrict_to_languages: Option<&HashSet<Arc<Language>>>,
 4295        cx: &mut ViewContext<Editor>,
 4296    ) -> HashMap<ExcerptId, (Model<Buffer>, clock::Global, Range<usize>)> {
 4297        let Some(project) = self.project.as_ref() else {
 4298            return HashMap::default();
 4299        };
 4300        let project = project.read(cx);
 4301        let multi_buffer = self.buffer().read(cx);
 4302        let multi_buffer_snapshot = multi_buffer.snapshot(cx);
 4303        let multi_buffer_visible_start = self
 4304            .scroll_manager
 4305            .anchor()
 4306            .anchor
 4307            .to_point(&multi_buffer_snapshot);
 4308        let multi_buffer_visible_end = multi_buffer_snapshot.clip_point(
 4309            multi_buffer_visible_start
 4310                + Point::new(self.visible_line_count().unwrap_or(0.).ceil() as u32, 0),
 4311            Bias::Left,
 4312        );
 4313        let multi_buffer_visible_range = multi_buffer_visible_start..multi_buffer_visible_end;
 4314        multi_buffer
 4315            .range_to_buffer_ranges(multi_buffer_visible_range, cx)
 4316            .into_iter()
 4317            .filter(|(_, excerpt_visible_range, _)| !excerpt_visible_range.is_empty())
 4318            .filter_map(|(buffer_handle, excerpt_visible_range, excerpt_id)| {
 4319                let buffer = buffer_handle.read(cx);
 4320                let buffer_file = project::File::from_dyn(buffer.file())?;
 4321                let buffer_worktree = project.worktree_for_id(buffer_file.worktree_id(cx), cx)?;
 4322                let worktree_entry = buffer_worktree
 4323                    .read(cx)
 4324                    .entry_for_id(buffer_file.project_entry_id(cx)?)?;
 4325                if worktree_entry.is_ignored {
 4326                    return None;
 4327                }
 4328
 4329                let language = buffer.language()?;
 4330                if let Some(restrict_to_languages) = restrict_to_languages {
 4331                    if !restrict_to_languages.contains(language) {
 4332                        return None;
 4333                    }
 4334                }
 4335                Some((
 4336                    excerpt_id,
 4337                    (
 4338                        buffer_handle,
 4339                        buffer.version().clone(),
 4340                        excerpt_visible_range,
 4341                    ),
 4342                ))
 4343            })
 4344            .collect()
 4345    }
 4346
 4347    pub fn text_layout_details(&self, cx: &WindowContext) -> TextLayoutDetails {
 4348        TextLayoutDetails {
 4349            text_system: cx.text_system().clone(),
 4350            editor_style: self.style.clone().unwrap(),
 4351            rem_size: cx.rem_size(),
 4352            scroll_anchor: self.scroll_manager.anchor(),
 4353            visible_rows: self.visible_line_count(),
 4354            vertical_scroll_margin: self.scroll_manager.vertical_scroll_margin,
 4355        }
 4356    }
 4357
 4358    fn splice_inlays(
 4359        &self,
 4360        to_remove: Vec<InlayId>,
 4361        to_insert: Vec<Inlay>,
 4362        cx: &mut ViewContext<Self>,
 4363    ) {
 4364        self.display_map.update(cx, |display_map, cx| {
 4365            display_map.splice_inlays(to_remove, to_insert, cx);
 4366        });
 4367        cx.notify();
 4368    }
 4369
 4370    fn trigger_on_type_formatting(
 4371        &self,
 4372        input: String,
 4373        cx: &mut ViewContext<Self>,
 4374    ) -> Option<Task<Result<()>>> {
 4375        if input.len() != 1 {
 4376            return None;
 4377        }
 4378
 4379        let project = self.project.as_ref()?;
 4380        let position = self.selections.newest_anchor().head();
 4381        let (buffer, buffer_position) = self
 4382            .buffer
 4383            .read(cx)
 4384            .text_anchor_for_position(position, cx)?;
 4385
 4386        let settings = language_settings::language_settings(
 4387            buffer
 4388                .read(cx)
 4389                .language_at(buffer_position)
 4390                .map(|l| l.name()),
 4391            buffer.read(cx).file(),
 4392            cx,
 4393        );
 4394        if !settings.use_on_type_format {
 4395            return None;
 4396        }
 4397
 4398        // OnTypeFormatting returns a list of edits, no need to pass them between Zed instances,
 4399        // hence we do LSP request & edit on host side only — add formats to host's history.
 4400        let push_to_lsp_host_history = true;
 4401        // If this is not the host, append its history with new edits.
 4402        let push_to_client_history = project.read(cx).is_via_collab();
 4403
 4404        let on_type_formatting = project.update(cx, |project, cx| {
 4405            project.on_type_format(
 4406                buffer.clone(),
 4407                buffer_position,
 4408                input,
 4409                push_to_lsp_host_history,
 4410                cx,
 4411            )
 4412        });
 4413        Some(cx.spawn(|editor, mut cx| async move {
 4414            if let Some(transaction) = on_type_formatting.await? {
 4415                if push_to_client_history {
 4416                    buffer
 4417                        .update(&mut cx, |buffer, _| {
 4418                            buffer.push_transaction(transaction, Instant::now());
 4419                        })
 4420                        .ok();
 4421                }
 4422                editor.update(&mut cx, |editor, cx| {
 4423                    editor.refresh_document_highlights(cx);
 4424                })?;
 4425            }
 4426            Ok(())
 4427        }))
 4428    }
 4429
 4430    pub fn show_completions(&mut self, options: &ShowCompletions, cx: &mut ViewContext<Self>) {
 4431        if self.pending_rename.is_some() {
 4432            return;
 4433        }
 4434
 4435        let Some(provider) = self.completion_provider.as_ref() else {
 4436            return;
 4437        };
 4438
 4439        if !self.snippet_stack.is_empty() && self.context_menu.read().as_ref().is_some() {
 4440            return;
 4441        }
 4442
 4443        let position = self.selections.newest_anchor().head();
 4444        let (buffer, buffer_position) =
 4445            if let Some(output) = self.buffer.read(cx).text_anchor_for_position(position, cx) {
 4446                output
 4447            } else {
 4448                return;
 4449            };
 4450
 4451        let query = Self::completion_query(&self.buffer.read(cx).read(cx), position);
 4452        let is_followup_invoke = {
 4453            let context_menu_state = self.context_menu.read();
 4454            matches!(
 4455                context_menu_state.deref(),
 4456                Some(ContextMenu::Completions(_))
 4457            )
 4458        };
 4459        let trigger_kind = match (&options.trigger, is_followup_invoke) {
 4460            (_, true) => CompletionTriggerKind::TRIGGER_FOR_INCOMPLETE_COMPLETIONS,
 4461            (Some(trigger), _) if buffer.read(cx).completion_triggers().contains(trigger) => {
 4462                CompletionTriggerKind::TRIGGER_CHARACTER
 4463            }
 4464
 4465            _ => CompletionTriggerKind::INVOKED,
 4466        };
 4467        let completion_context = CompletionContext {
 4468            trigger_character: options.trigger.as_ref().and_then(|trigger| {
 4469                if trigger_kind == CompletionTriggerKind::TRIGGER_CHARACTER {
 4470                    Some(String::from(trigger))
 4471                } else {
 4472                    None
 4473                }
 4474            }),
 4475            trigger_kind,
 4476        };
 4477        let completions = provider.completions(&buffer, buffer_position, completion_context, cx);
 4478        let sort_completions = provider.sort_completions();
 4479
 4480        let id = post_inc(&mut self.next_completion_id);
 4481        let task = cx.spawn(|editor, mut cx| {
 4482            async move {
 4483                editor.update(&mut cx, |this, _| {
 4484                    this.completion_tasks.retain(|(task_id, _)| *task_id >= id);
 4485                })?;
 4486                let completions = completions.await.log_err();
 4487                let menu = if let Some(completions) = completions {
 4488                    let mut menu = CompletionsMenu::new(
 4489                        id,
 4490                        sort_completions,
 4491                        position,
 4492                        buffer.clone(),
 4493                        completions.into(),
 4494                    );
 4495                    menu.filter(query.as_deref(), cx.background_executor().clone())
 4496                        .await;
 4497
 4498                    if menu.matches.is_empty() {
 4499                        None
 4500                    } else {
 4501                        Some(menu)
 4502                    }
 4503                } else {
 4504                    None
 4505                };
 4506
 4507                editor.update(&mut cx, |editor, cx| {
 4508                    let mut context_menu = editor.context_menu.write();
 4509                    match context_menu.as_ref() {
 4510                        None => {}
 4511
 4512                        Some(ContextMenu::Completions(prev_menu)) => {
 4513                            if prev_menu.id > id {
 4514                                return;
 4515                            }
 4516                        }
 4517
 4518                        _ => return,
 4519                    }
 4520
 4521                    if editor.focus_handle.is_focused(cx) && menu.is_some() {
 4522                        let mut menu = menu.unwrap();
 4523                        menu.resolve_selected_completion(editor.completion_provider.as_deref(), cx);
 4524                        *context_menu = Some(ContextMenu::Completions(menu));
 4525                        drop(context_menu);
 4526                        editor.discard_inline_completion(false, cx);
 4527                        cx.notify();
 4528                    } else if editor.completion_tasks.len() <= 1 {
 4529                        // If there are no more completion tasks and the last menu was
 4530                        // empty, we should hide it. If it was already hidden, we should
 4531                        // also show the copilot completion when available.
 4532                        drop(context_menu);
 4533                        if editor.hide_context_menu(cx).is_none() {
 4534                            editor.update_visible_inline_completion(cx);
 4535                        }
 4536                    }
 4537                })?;
 4538
 4539                Ok::<_, anyhow::Error>(())
 4540            }
 4541            .log_err()
 4542        });
 4543
 4544        self.completion_tasks.push((id, task));
 4545    }
 4546
 4547    pub fn confirm_completion(
 4548        &mut self,
 4549        action: &ConfirmCompletion,
 4550        cx: &mut ViewContext<Self>,
 4551    ) -> Option<Task<Result<()>>> {
 4552        self.do_completion(action.item_ix, CompletionIntent::Complete, cx)
 4553    }
 4554
 4555    pub fn compose_completion(
 4556        &mut self,
 4557        action: &ComposeCompletion,
 4558        cx: &mut ViewContext<Self>,
 4559    ) -> Option<Task<Result<()>>> {
 4560        self.do_completion(action.item_ix, CompletionIntent::Compose, cx)
 4561    }
 4562
 4563    fn do_completion(
 4564        &mut self,
 4565        item_ix: Option<usize>,
 4566        intent: CompletionIntent,
 4567        cx: &mut ViewContext<Editor>,
 4568    ) -> Option<Task<std::result::Result<(), anyhow::Error>>> {
 4569        use language::ToOffset as _;
 4570
 4571        let completions_menu = if let ContextMenu::Completions(menu) = self.hide_context_menu(cx)? {
 4572            menu
 4573        } else {
 4574            return None;
 4575        };
 4576
 4577        let mat = completions_menu
 4578            .matches
 4579            .get(item_ix.unwrap_or(completions_menu.selected_item))?;
 4580        let buffer_handle = completions_menu.buffer;
 4581        let completions = completions_menu.completions.read();
 4582        let completion = completions.get(mat.candidate_id)?;
 4583        cx.stop_propagation();
 4584
 4585        let snippet;
 4586        let text;
 4587
 4588        if completion.is_snippet() {
 4589            snippet = Some(Snippet::parse(&completion.new_text).log_err()?);
 4590            text = snippet.as_ref().unwrap().text.clone();
 4591        } else {
 4592            snippet = None;
 4593            text = completion.new_text.clone();
 4594        };
 4595        let selections = self.selections.all::<usize>(cx);
 4596        let buffer = buffer_handle.read(cx);
 4597        let old_range = completion.old_range.to_offset(buffer);
 4598        let old_text = buffer.text_for_range(old_range.clone()).collect::<String>();
 4599
 4600        let newest_selection = self.selections.newest_anchor();
 4601        if newest_selection.start.buffer_id != Some(buffer_handle.read(cx).remote_id()) {
 4602            return None;
 4603        }
 4604
 4605        let lookbehind = newest_selection
 4606            .start
 4607            .text_anchor
 4608            .to_offset(buffer)
 4609            .saturating_sub(old_range.start);
 4610        let lookahead = old_range
 4611            .end
 4612            .saturating_sub(newest_selection.end.text_anchor.to_offset(buffer));
 4613        let mut common_prefix_len = old_text
 4614            .bytes()
 4615            .zip(text.bytes())
 4616            .take_while(|(a, b)| a == b)
 4617            .count();
 4618
 4619        let snapshot = self.buffer.read(cx).snapshot(cx);
 4620        let mut range_to_replace: Option<Range<isize>> = None;
 4621        let mut ranges = Vec::new();
 4622        let mut linked_edits = HashMap::<_, Vec<_>>::default();
 4623        for selection in &selections {
 4624            if snapshot.contains_str_at(selection.start.saturating_sub(lookbehind), &old_text) {
 4625                let start = selection.start.saturating_sub(lookbehind);
 4626                let end = selection.end + lookahead;
 4627                if selection.id == newest_selection.id {
 4628                    range_to_replace = Some(
 4629                        ((start + common_prefix_len) as isize - selection.start as isize)
 4630                            ..(end as isize - selection.start as isize),
 4631                    );
 4632                }
 4633                ranges.push(start + common_prefix_len..end);
 4634            } else {
 4635                common_prefix_len = 0;
 4636                ranges.clear();
 4637                ranges.extend(selections.iter().map(|s| {
 4638                    if s.id == newest_selection.id {
 4639                        range_to_replace = Some(
 4640                            old_range.start.to_offset_utf16(&snapshot).0 as isize
 4641                                - selection.start as isize
 4642                                ..old_range.end.to_offset_utf16(&snapshot).0 as isize
 4643                                    - selection.start as isize,
 4644                        );
 4645                        old_range.clone()
 4646                    } else {
 4647                        s.start..s.end
 4648                    }
 4649                }));
 4650                break;
 4651            }
 4652            if !self.linked_edit_ranges.is_empty() {
 4653                let start_anchor = snapshot.anchor_before(selection.head());
 4654                let end_anchor = snapshot.anchor_after(selection.tail());
 4655                if let Some(ranges) = self
 4656                    .linked_editing_ranges_for(start_anchor.text_anchor..end_anchor.text_anchor, cx)
 4657                {
 4658                    for (buffer, edits) in ranges {
 4659                        linked_edits.entry(buffer.clone()).or_default().extend(
 4660                            edits
 4661                                .into_iter()
 4662                                .map(|range| (range, text[common_prefix_len..].to_owned())),
 4663                        );
 4664                    }
 4665                }
 4666            }
 4667        }
 4668        let text = &text[common_prefix_len..];
 4669
 4670        cx.emit(EditorEvent::InputHandled {
 4671            utf16_range_to_replace: range_to_replace,
 4672            text: text.into(),
 4673        });
 4674
 4675        self.transact(cx, |this, cx| {
 4676            if let Some(mut snippet) = snippet {
 4677                snippet.text = text.to_string();
 4678                for tabstop in snippet
 4679                    .tabstops
 4680                    .iter_mut()
 4681                    .flat_map(|tabstop| tabstop.ranges.iter_mut())
 4682                {
 4683                    tabstop.start -= common_prefix_len as isize;
 4684                    tabstop.end -= common_prefix_len as isize;
 4685                }
 4686
 4687                this.insert_snippet(&ranges, snippet, cx).log_err();
 4688            } else {
 4689                this.buffer.update(cx, |buffer, cx| {
 4690                    buffer.edit(
 4691                        ranges.iter().map(|range| (range.clone(), text)),
 4692                        this.autoindent_mode.clone(),
 4693                        cx,
 4694                    );
 4695                });
 4696            }
 4697            for (buffer, edits) in linked_edits {
 4698                buffer.update(cx, |buffer, cx| {
 4699                    let snapshot = buffer.snapshot();
 4700                    let edits = edits
 4701                        .into_iter()
 4702                        .map(|(range, text)| {
 4703                            use text::ToPoint as TP;
 4704                            let end_point = TP::to_point(&range.end, &snapshot);
 4705                            let start_point = TP::to_point(&range.start, &snapshot);
 4706                            (start_point..end_point, text)
 4707                        })
 4708                        .sorted_by_key(|(range, _)| range.start)
 4709                        .collect::<Vec<_>>();
 4710                    buffer.edit(edits, None, cx);
 4711                })
 4712            }
 4713
 4714            this.refresh_inline_completion(true, false, cx);
 4715        });
 4716
 4717        let show_new_completions_on_confirm = completion
 4718            .confirm
 4719            .as_ref()
 4720            .map_or(false, |confirm| confirm(intent, cx));
 4721        if show_new_completions_on_confirm {
 4722            self.show_completions(&ShowCompletions { trigger: None }, cx);
 4723        }
 4724
 4725        let provider = self.completion_provider.as_ref()?;
 4726        let apply_edits = provider.apply_additional_edits_for_completion(
 4727            buffer_handle,
 4728            completion.clone(),
 4729            true,
 4730            cx,
 4731        );
 4732
 4733        let editor_settings = EditorSettings::get_global(cx);
 4734        if editor_settings.show_signature_help_after_edits || editor_settings.auto_signature_help {
 4735            // After the code completion is finished, users often want to know what signatures are needed.
 4736            // so we should automatically call signature_help
 4737            self.show_signature_help(&ShowSignatureHelp, cx);
 4738        }
 4739
 4740        Some(cx.foreground_executor().spawn(async move {
 4741            apply_edits.await?;
 4742            Ok(())
 4743        }))
 4744    }
 4745
 4746    pub fn toggle_code_actions(&mut self, action: &ToggleCodeActions, cx: &mut ViewContext<Self>) {
 4747        let mut context_menu = self.context_menu.write();
 4748        if let Some(ContextMenu::CodeActions(code_actions)) = context_menu.as_ref() {
 4749            if code_actions.deployed_from_indicator == action.deployed_from_indicator {
 4750                // Toggle if we're selecting the same one
 4751                *context_menu = None;
 4752                cx.notify();
 4753                return;
 4754            } else {
 4755                // Otherwise, clear it and start a new one
 4756                *context_menu = None;
 4757                cx.notify();
 4758            }
 4759        }
 4760        drop(context_menu);
 4761        let snapshot = self.snapshot(cx);
 4762        let deployed_from_indicator = action.deployed_from_indicator;
 4763        let mut task = self.code_actions_task.take();
 4764        let action = action.clone();
 4765        cx.spawn(|editor, mut cx| async move {
 4766            while let Some(prev_task) = task {
 4767                prev_task.await.log_err();
 4768                task = editor.update(&mut cx, |this, _| this.code_actions_task.take())?;
 4769            }
 4770
 4771            let spawned_test_task = editor.update(&mut cx, |editor, cx| {
 4772                if editor.focus_handle.is_focused(cx) {
 4773                    let multibuffer_point = action
 4774                        .deployed_from_indicator
 4775                        .map(|row| DisplayPoint::new(row, 0).to_point(&snapshot))
 4776                        .unwrap_or_else(|| editor.selections.newest::<Point>(cx).head());
 4777                    let (buffer, buffer_row) = snapshot
 4778                        .buffer_snapshot
 4779                        .buffer_line_for_row(MultiBufferRow(multibuffer_point.row))
 4780                        .and_then(|(buffer_snapshot, range)| {
 4781                            editor
 4782                                .buffer
 4783                                .read(cx)
 4784                                .buffer(buffer_snapshot.remote_id())
 4785                                .map(|buffer| (buffer, range.start.row))
 4786                        })?;
 4787                    let (_, code_actions) = editor
 4788                        .available_code_actions
 4789                        .clone()
 4790                        .and_then(|(location, code_actions)| {
 4791                            let snapshot = location.buffer.read(cx).snapshot();
 4792                            let point_range = location.range.to_point(&snapshot);
 4793                            let point_range = point_range.start.row..=point_range.end.row;
 4794                            if point_range.contains(&buffer_row) {
 4795                                Some((location, code_actions))
 4796                            } else {
 4797                                None
 4798                            }
 4799                        })
 4800                        .unzip();
 4801                    let buffer_id = buffer.read(cx).remote_id();
 4802                    let tasks = editor
 4803                        .tasks
 4804                        .get(&(buffer_id, buffer_row))
 4805                        .map(|t| Arc::new(t.to_owned()));
 4806                    if tasks.is_none() && code_actions.is_none() {
 4807                        return None;
 4808                    }
 4809
 4810                    editor.completion_tasks.clear();
 4811                    editor.discard_inline_completion(false, cx);
 4812                    let task_context =
 4813                        tasks
 4814                            .as_ref()
 4815                            .zip(editor.project.clone())
 4816                            .map(|(tasks, project)| {
 4817                                Self::build_tasks_context(&project, &buffer, buffer_row, tasks, cx)
 4818                            });
 4819
 4820                    Some(cx.spawn(|editor, mut cx| async move {
 4821                        let task_context = match task_context {
 4822                            Some(task_context) => task_context.await,
 4823                            None => None,
 4824                        };
 4825                        let resolved_tasks =
 4826                            tasks.zip(task_context).map(|(tasks, task_context)| {
 4827                                Arc::new(ResolvedTasks {
 4828                                    templates: tasks.resolve(&task_context).collect(),
 4829                                    position: snapshot.buffer_snapshot.anchor_before(Point::new(
 4830                                        multibuffer_point.row,
 4831                                        tasks.column,
 4832                                    )),
 4833                                })
 4834                            });
 4835                        let spawn_straight_away = resolved_tasks
 4836                            .as_ref()
 4837                            .map_or(false, |tasks| tasks.templates.len() == 1)
 4838                            && code_actions
 4839                                .as_ref()
 4840                                .map_or(true, |actions| actions.is_empty());
 4841                        if let Ok(task) = editor.update(&mut cx, |editor, cx| {
 4842                            *editor.context_menu.write() =
 4843                                Some(ContextMenu::CodeActions(CodeActionsMenu {
 4844                                    buffer,
 4845                                    actions: CodeActionContents {
 4846                                        tasks: resolved_tasks,
 4847                                        actions: code_actions,
 4848                                    },
 4849                                    selected_item: Default::default(),
 4850                                    scroll_handle: UniformListScrollHandle::default(),
 4851                                    deployed_from_indicator,
 4852                                }));
 4853                            if spawn_straight_away {
 4854                                if let Some(task) = editor.confirm_code_action(
 4855                                    &ConfirmCodeAction { item_ix: Some(0) },
 4856                                    cx,
 4857                                ) {
 4858                                    cx.notify();
 4859                                    return task;
 4860                                }
 4861                            }
 4862                            cx.notify();
 4863                            Task::ready(Ok(()))
 4864                        }) {
 4865                            task.await
 4866                        } else {
 4867                            Ok(())
 4868                        }
 4869                    }))
 4870                } else {
 4871                    Some(Task::ready(Ok(())))
 4872                }
 4873            })?;
 4874            if let Some(task) = spawned_test_task {
 4875                task.await?;
 4876            }
 4877
 4878            Ok::<_, anyhow::Error>(())
 4879        })
 4880        .detach_and_log_err(cx);
 4881    }
 4882
 4883    pub fn confirm_code_action(
 4884        &mut self,
 4885        action: &ConfirmCodeAction,
 4886        cx: &mut ViewContext<Self>,
 4887    ) -> Option<Task<Result<()>>> {
 4888        let actions_menu = if let ContextMenu::CodeActions(menu) = self.hide_context_menu(cx)? {
 4889            menu
 4890        } else {
 4891            return None;
 4892        };
 4893        let action_ix = action.item_ix.unwrap_or(actions_menu.selected_item);
 4894        let action = actions_menu.actions.get(action_ix)?;
 4895        let title = action.label();
 4896        let buffer = actions_menu.buffer;
 4897        let workspace = self.workspace()?;
 4898
 4899        match action {
 4900            CodeActionsItem::Task(task_source_kind, resolved_task) => {
 4901                workspace.update(cx, |workspace, cx| {
 4902                    workspace::tasks::schedule_resolved_task(
 4903                        workspace,
 4904                        task_source_kind,
 4905                        resolved_task,
 4906                        false,
 4907                        cx,
 4908                    );
 4909
 4910                    Some(Task::ready(Ok(())))
 4911                })
 4912            }
 4913            CodeActionsItem::CodeAction {
 4914                excerpt_id,
 4915                action,
 4916                provider,
 4917            } => {
 4918                let apply_code_action =
 4919                    provider.apply_code_action(buffer, action, excerpt_id, true, cx);
 4920                let workspace = workspace.downgrade();
 4921                Some(cx.spawn(|editor, cx| async move {
 4922                    let project_transaction = apply_code_action.await?;
 4923                    Self::open_project_transaction(
 4924                        &editor,
 4925                        workspace,
 4926                        project_transaction,
 4927                        title,
 4928                        cx,
 4929                    )
 4930                    .await
 4931                }))
 4932            }
 4933        }
 4934    }
 4935
 4936    pub async fn open_project_transaction(
 4937        this: &WeakView<Editor>,
 4938        workspace: WeakView<Workspace>,
 4939        transaction: ProjectTransaction,
 4940        title: String,
 4941        mut cx: AsyncWindowContext,
 4942    ) -> Result<()> {
 4943        let mut entries = transaction.0.into_iter().collect::<Vec<_>>();
 4944        cx.update(|cx| {
 4945            entries.sort_unstable_by_key(|(buffer, _)| {
 4946                buffer.read(cx).file().map(|f| f.path().clone())
 4947            });
 4948        })?;
 4949
 4950        // If the project transaction's edits are all contained within this editor, then
 4951        // avoid opening a new editor to display them.
 4952
 4953        if let Some((buffer, transaction)) = entries.first() {
 4954            if entries.len() == 1 {
 4955                let excerpt = this.update(&mut cx, |editor, cx| {
 4956                    editor
 4957                        .buffer()
 4958                        .read(cx)
 4959                        .excerpt_containing(editor.selections.newest_anchor().head(), cx)
 4960                })?;
 4961                if let Some((_, excerpted_buffer, excerpt_range)) = excerpt {
 4962                    if excerpted_buffer == *buffer {
 4963                        let all_edits_within_excerpt = buffer.read_with(&cx, |buffer, _| {
 4964                            let excerpt_range = excerpt_range.to_offset(buffer);
 4965                            buffer
 4966                                .edited_ranges_for_transaction::<usize>(transaction)
 4967                                .all(|range| {
 4968                                    excerpt_range.start <= range.start
 4969                                        && excerpt_range.end >= range.end
 4970                                })
 4971                        })?;
 4972
 4973                        if all_edits_within_excerpt {
 4974                            return Ok(());
 4975                        }
 4976                    }
 4977                }
 4978            }
 4979        } else {
 4980            return Ok(());
 4981        }
 4982
 4983        let mut ranges_to_highlight = Vec::new();
 4984        let excerpt_buffer = cx.new_model(|cx| {
 4985            let mut multibuffer = MultiBuffer::new(Capability::ReadWrite).with_title(title);
 4986            for (buffer_handle, transaction) in &entries {
 4987                let buffer = buffer_handle.read(cx);
 4988                ranges_to_highlight.extend(
 4989                    multibuffer.push_excerpts_with_context_lines(
 4990                        buffer_handle.clone(),
 4991                        buffer
 4992                            .edited_ranges_for_transaction::<usize>(transaction)
 4993                            .collect(),
 4994                        DEFAULT_MULTIBUFFER_CONTEXT,
 4995                        cx,
 4996                    ),
 4997                );
 4998            }
 4999            multibuffer.push_transaction(entries.iter().map(|(b, t)| (b, t)), cx);
 5000            multibuffer
 5001        })?;
 5002
 5003        workspace.update(&mut cx, |workspace, cx| {
 5004            let project = workspace.project().clone();
 5005            let editor =
 5006                cx.new_view(|cx| Editor::for_multibuffer(excerpt_buffer, Some(project), true, cx));
 5007            workspace.add_item_to_active_pane(Box::new(editor.clone()), None, true, cx);
 5008            editor.update(cx, |editor, cx| {
 5009                editor.highlight_background::<Self>(
 5010                    &ranges_to_highlight,
 5011                    |theme| theme.editor_highlighted_line_background,
 5012                    cx,
 5013                );
 5014            });
 5015        })?;
 5016
 5017        Ok(())
 5018    }
 5019
 5020    pub fn clear_code_action_providers(&mut self) {
 5021        self.code_action_providers.clear();
 5022        self.available_code_actions.take();
 5023    }
 5024
 5025    pub fn push_code_action_provider(
 5026        &mut self,
 5027        provider: Arc<dyn CodeActionProvider>,
 5028        cx: &mut ViewContext<Self>,
 5029    ) {
 5030        self.code_action_providers.push(provider);
 5031        self.refresh_code_actions(cx);
 5032    }
 5033
 5034    fn refresh_code_actions(&mut self, cx: &mut ViewContext<Self>) -> Option<()> {
 5035        let buffer = self.buffer.read(cx);
 5036        let newest_selection = self.selections.newest_anchor().clone();
 5037        let (start_buffer, start) = buffer.text_anchor_for_position(newest_selection.start, cx)?;
 5038        let (end_buffer, end) = buffer.text_anchor_for_position(newest_selection.end, cx)?;
 5039        if start_buffer != end_buffer {
 5040            return None;
 5041        }
 5042
 5043        self.code_actions_task = Some(cx.spawn(|this, mut cx| async move {
 5044            cx.background_executor()
 5045                .timer(CODE_ACTIONS_DEBOUNCE_TIMEOUT)
 5046                .await;
 5047
 5048            let (providers, tasks) = this.update(&mut cx, |this, cx| {
 5049                let providers = this.code_action_providers.clone();
 5050                let tasks = this
 5051                    .code_action_providers
 5052                    .iter()
 5053                    .map(|provider| provider.code_actions(&start_buffer, start..end, cx))
 5054                    .collect::<Vec<_>>();
 5055                (providers, tasks)
 5056            })?;
 5057
 5058            let mut actions = Vec::new();
 5059            for (provider, provider_actions) in
 5060                providers.into_iter().zip(future::join_all(tasks).await)
 5061            {
 5062                if let Some(provider_actions) = provider_actions.log_err() {
 5063                    actions.extend(provider_actions.into_iter().map(|action| {
 5064                        AvailableCodeAction {
 5065                            excerpt_id: newest_selection.start.excerpt_id,
 5066                            action,
 5067                            provider: provider.clone(),
 5068                        }
 5069                    }));
 5070                }
 5071            }
 5072
 5073            this.update(&mut cx, |this, cx| {
 5074                this.available_code_actions = if actions.is_empty() {
 5075                    None
 5076                } else {
 5077                    Some((
 5078                        Location {
 5079                            buffer: start_buffer,
 5080                            range: start..end,
 5081                        },
 5082                        actions.into(),
 5083                    ))
 5084                };
 5085                cx.notify();
 5086            })
 5087        }));
 5088        None
 5089    }
 5090
 5091    fn start_inline_blame_timer(&mut self, cx: &mut ViewContext<Self>) {
 5092        if let Some(delay) = ProjectSettings::get_global(cx).git.inline_blame_delay() {
 5093            self.show_git_blame_inline = false;
 5094
 5095            self.show_git_blame_inline_delay_task = Some(cx.spawn(|this, mut cx| async move {
 5096                cx.background_executor().timer(delay).await;
 5097
 5098                this.update(&mut cx, |this, cx| {
 5099                    this.show_git_blame_inline = true;
 5100                    cx.notify();
 5101                })
 5102                .log_err();
 5103            }));
 5104        }
 5105    }
 5106
 5107    fn refresh_document_highlights(&mut self, cx: &mut ViewContext<Self>) -> Option<()> {
 5108        if self.pending_rename.is_some() {
 5109            return None;
 5110        }
 5111
 5112        let provider = self.semantics_provider.clone()?;
 5113        let buffer = self.buffer.read(cx);
 5114        let newest_selection = self.selections.newest_anchor().clone();
 5115        let cursor_position = newest_selection.head();
 5116        let (cursor_buffer, cursor_buffer_position) =
 5117            buffer.text_anchor_for_position(cursor_position, cx)?;
 5118        let (tail_buffer, _) = buffer.text_anchor_for_position(newest_selection.tail(), cx)?;
 5119        if cursor_buffer != tail_buffer {
 5120            return None;
 5121        }
 5122
 5123        self.document_highlights_task = Some(cx.spawn(|this, mut cx| async move {
 5124            cx.background_executor()
 5125                .timer(DOCUMENT_HIGHLIGHTS_DEBOUNCE_TIMEOUT)
 5126                .await;
 5127
 5128            let highlights = if let Some(highlights) = cx
 5129                .update(|cx| {
 5130                    provider.document_highlights(&cursor_buffer, cursor_buffer_position, cx)
 5131                })
 5132                .ok()
 5133                .flatten()
 5134            {
 5135                highlights.await.log_err()
 5136            } else {
 5137                None
 5138            };
 5139
 5140            if let Some(highlights) = highlights {
 5141                this.update(&mut cx, |this, cx| {
 5142                    if this.pending_rename.is_some() {
 5143                        return;
 5144                    }
 5145
 5146                    let buffer_id = cursor_position.buffer_id;
 5147                    let buffer = this.buffer.read(cx);
 5148                    if !buffer
 5149                        .text_anchor_for_position(cursor_position, cx)
 5150                        .map_or(false, |(buffer, _)| buffer == cursor_buffer)
 5151                    {
 5152                        return;
 5153                    }
 5154
 5155                    let cursor_buffer_snapshot = cursor_buffer.read(cx);
 5156                    let mut write_ranges = Vec::new();
 5157                    let mut read_ranges = Vec::new();
 5158                    for highlight in highlights {
 5159                        for (excerpt_id, excerpt_range) in
 5160                            buffer.excerpts_for_buffer(&cursor_buffer, cx)
 5161                        {
 5162                            let start = highlight
 5163                                .range
 5164                                .start
 5165                                .max(&excerpt_range.context.start, cursor_buffer_snapshot);
 5166                            let end = highlight
 5167                                .range
 5168                                .end
 5169                                .min(&excerpt_range.context.end, cursor_buffer_snapshot);
 5170                            if start.cmp(&end, cursor_buffer_snapshot).is_ge() {
 5171                                continue;
 5172                            }
 5173
 5174                            let range = Anchor {
 5175                                buffer_id,
 5176                                excerpt_id,
 5177                                text_anchor: start,
 5178                            }..Anchor {
 5179                                buffer_id,
 5180                                excerpt_id,
 5181                                text_anchor: end,
 5182                            };
 5183                            if highlight.kind == lsp::DocumentHighlightKind::WRITE {
 5184                                write_ranges.push(range);
 5185                            } else {
 5186                                read_ranges.push(range);
 5187                            }
 5188                        }
 5189                    }
 5190
 5191                    this.highlight_background::<DocumentHighlightRead>(
 5192                        &read_ranges,
 5193                        |theme| theme.editor_document_highlight_read_background,
 5194                        cx,
 5195                    );
 5196                    this.highlight_background::<DocumentHighlightWrite>(
 5197                        &write_ranges,
 5198                        |theme| theme.editor_document_highlight_write_background,
 5199                        cx,
 5200                    );
 5201                    cx.notify();
 5202                })
 5203                .log_err();
 5204            }
 5205        }));
 5206        None
 5207    }
 5208
 5209    pub fn refresh_inline_completion(
 5210        &mut self,
 5211        debounce: bool,
 5212        user_requested: bool,
 5213        cx: &mut ViewContext<Self>,
 5214    ) -> Option<()> {
 5215        let provider = self.inline_completion_provider()?;
 5216        let cursor = self.selections.newest_anchor().head();
 5217        let (buffer, cursor_buffer_position) =
 5218            self.buffer.read(cx).text_anchor_for_position(cursor, cx)?;
 5219
 5220        if !user_requested
 5221            && (!self.enable_inline_completions
 5222                || !self.should_show_inline_completions(&buffer, cursor_buffer_position, cx))
 5223        {
 5224            self.discard_inline_completion(false, cx);
 5225            return None;
 5226        }
 5227
 5228        self.update_visible_inline_completion(cx);
 5229        provider.refresh(buffer, cursor_buffer_position, debounce, cx);
 5230        Some(())
 5231    }
 5232
 5233    fn cycle_inline_completion(
 5234        &mut self,
 5235        direction: Direction,
 5236        cx: &mut ViewContext<Self>,
 5237    ) -> Option<()> {
 5238        let provider = self.inline_completion_provider()?;
 5239        let cursor = self.selections.newest_anchor().head();
 5240        let (buffer, cursor_buffer_position) =
 5241            self.buffer.read(cx).text_anchor_for_position(cursor, cx)?;
 5242        if !self.enable_inline_completions
 5243            || !self.should_show_inline_completions(&buffer, cursor_buffer_position, cx)
 5244        {
 5245            return None;
 5246        }
 5247
 5248        provider.cycle(buffer, cursor_buffer_position, direction, cx);
 5249        self.update_visible_inline_completion(cx);
 5250
 5251        Some(())
 5252    }
 5253
 5254    pub fn show_inline_completion(&mut self, _: &ShowInlineCompletion, cx: &mut ViewContext<Self>) {
 5255        if !self.has_active_inline_completion(cx) {
 5256            self.refresh_inline_completion(false, true, cx);
 5257            return;
 5258        }
 5259
 5260        self.update_visible_inline_completion(cx);
 5261    }
 5262
 5263    pub fn display_cursor_names(&mut self, _: &DisplayCursorNames, cx: &mut ViewContext<Self>) {
 5264        self.show_cursor_names(cx);
 5265    }
 5266
 5267    fn show_cursor_names(&mut self, cx: &mut ViewContext<Self>) {
 5268        self.show_cursor_names = true;
 5269        cx.notify();
 5270        cx.spawn(|this, mut cx| async move {
 5271            cx.background_executor().timer(CURSORS_VISIBLE_FOR).await;
 5272            this.update(&mut cx, |this, cx| {
 5273                this.show_cursor_names = false;
 5274                cx.notify()
 5275            })
 5276            .ok()
 5277        })
 5278        .detach();
 5279    }
 5280
 5281    pub fn next_inline_completion(&mut self, _: &NextInlineCompletion, cx: &mut ViewContext<Self>) {
 5282        if self.has_active_inline_completion(cx) {
 5283            self.cycle_inline_completion(Direction::Next, cx);
 5284        } else {
 5285            let is_copilot_disabled = self.refresh_inline_completion(false, true, cx).is_none();
 5286            if is_copilot_disabled {
 5287                cx.propagate();
 5288            }
 5289        }
 5290    }
 5291
 5292    pub fn previous_inline_completion(
 5293        &mut self,
 5294        _: &PreviousInlineCompletion,
 5295        cx: &mut ViewContext<Self>,
 5296    ) {
 5297        if self.has_active_inline_completion(cx) {
 5298            self.cycle_inline_completion(Direction::Prev, cx);
 5299        } else {
 5300            let is_copilot_disabled = self.refresh_inline_completion(false, true, cx).is_none();
 5301            if is_copilot_disabled {
 5302                cx.propagate();
 5303            }
 5304        }
 5305    }
 5306
 5307    pub fn accept_inline_completion(
 5308        &mut self,
 5309        _: &AcceptInlineCompletion,
 5310        cx: &mut ViewContext<Self>,
 5311    ) {
 5312        let Some(completion) = self.take_active_inline_completion(cx) else {
 5313            return;
 5314        };
 5315        if let Some(provider) = self.inline_completion_provider() {
 5316            provider.accept(cx);
 5317        }
 5318
 5319        cx.emit(EditorEvent::InputHandled {
 5320            utf16_range_to_replace: None,
 5321            text: completion.text.to_string().into(),
 5322        });
 5323
 5324        if let Some(range) = completion.delete_range {
 5325            self.change_selections(None, cx, |s| s.select_ranges([range]))
 5326        }
 5327        self.insert_with_autoindent_mode(&completion.text.to_string(), None, cx);
 5328        self.refresh_inline_completion(true, true, cx);
 5329        cx.notify();
 5330    }
 5331
 5332    pub fn accept_partial_inline_completion(
 5333        &mut self,
 5334        _: &AcceptPartialInlineCompletion,
 5335        cx: &mut ViewContext<Self>,
 5336    ) {
 5337        if self.selections.count() == 1 && self.has_active_inline_completion(cx) {
 5338            if let Some(completion) = self.take_active_inline_completion(cx) {
 5339                let mut partial_completion = completion
 5340                    .text
 5341                    .chars()
 5342                    .by_ref()
 5343                    .take_while(|c| c.is_alphabetic())
 5344                    .collect::<String>();
 5345                if partial_completion.is_empty() {
 5346                    partial_completion = completion
 5347                        .text
 5348                        .chars()
 5349                        .by_ref()
 5350                        .take_while(|c| c.is_whitespace() || !c.is_alphabetic())
 5351                        .collect::<String>();
 5352                }
 5353
 5354                cx.emit(EditorEvent::InputHandled {
 5355                    utf16_range_to_replace: None,
 5356                    text: partial_completion.clone().into(),
 5357                });
 5358
 5359                if let Some(range) = completion.delete_range {
 5360                    self.change_selections(None, cx, |s| s.select_ranges([range]))
 5361                }
 5362                self.insert_with_autoindent_mode(&partial_completion, None, cx);
 5363
 5364                self.refresh_inline_completion(true, true, cx);
 5365                cx.notify();
 5366            }
 5367        }
 5368    }
 5369
 5370    fn discard_inline_completion(
 5371        &mut self,
 5372        should_report_inline_completion_event: bool,
 5373        cx: &mut ViewContext<Self>,
 5374    ) -> bool {
 5375        if let Some(provider) = self.inline_completion_provider() {
 5376            provider.discard(should_report_inline_completion_event, cx);
 5377        }
 5378
 5379        self.take_active_inline_completion(cx).is_some()
 5380    }
 5381
 5382    pub fn has_active_inline_completion(&self, cx: &AppContext) -> bool {
 5383        if let Some(completion) = self.active_inline_completion.as_ref() {
 5384            let buffer = self.buffer.read(cx).read(cx);
 5385            completion.position.is_valid(&buffer)
 5386        } else {
 5387            false
 5388        }
 5389    }
 5390
 5391    fn take_active_inline_completion(
 5392        &mut self,
 5393        cx: &mut ViewContext<Self>,
 5394    ) -> Option<CompletionState> {
 5395        let completion = self.active_inline_completion.take()?;
 5396        let render_inlay_ids = completion.render_inlay_ids.clone();
 5397        self.display_map.update(cx, |map, cx| {
 5398            map.splice_inlays(render_inlay_ids, Default::default(), cx);
 5399        });
 5400        let buffer = self.buffer.read(cx).read(cx);
 5401
 5402        if completion.position.is_valid(&buffer) {
 5403            Some(completion)
 5404        } else {
 5405            None
 5406        }
 5407    }
 5408
 5409    fn update_visible_inline_completion(&mut self, cx: &mut ViewContext<Self>) {
 5410        let selection = self.selections.newest_anchor();
 5411        let cursor = selection.head();
 5412
 5413        let excerpt_id = cursor.excerpt_id;
 5414
 5415        if self.context_menu.read().is_none()
 5416            && self.completion_tasks.is_empty()
 5417            && selection.start == selection.end
 5418        {
 5419            if let Some(provider) = self.inline_completion_provider() {
 5420                if let Some((buffer, cursor_buffer_position)) =
 5421                    self.buffer.read(cx).text_anchor_for_position(cursor, cx)
 5422                {
 5423                    if let Some(proposal) =
 5424                        provider.active_completion_text(&buffer, cursor_buffer_position, cx)
 5425                    {
 5426                        let mut to_remove = Vec::new();
 5427                        if let Some(completion) = self.active_inline_completion.take() {
 5428                            to_remove.extend(completion.render_inlay_ids.iter());
 5429                        }
 5430
 5431                        let to_add = proposal
 5432                            .inlays
 5433                            .iter()
 5434                            .filter_map(|inlay| {
 5435                                let snapshot = self.buffer.read(cx).snapshot(cx);
 5436                                let id = post_inc(&mut self.next_inlay_id);
 5437                                match inlay {
 5438                                    InlayProposal::Hint(position, hint) => {
 5439                                        let position =
 5440                                            snapshot.anchor_in_excerpt(excerpt_id, *position)?;
 5441                                        Some(Inlay::hint(id, position, hint))
 5442                                    }
 5443                                    InlayProposal::Suggestion(position, text) => {
 5444                                        let position =
 5445                                            snapshot.anchor_in_excerpt(excerpt_id, *position)?;
 5446                                        Some(Inlay::suggestion(id, position, text.clone()))
 5447                                    }
 5448                                }
 5449                            })
 5450                            .collect_vec();
 5451
 5452                        self.active_inline_completion = Some(CompletionState {
 5453                            position: cursor,
 5454                            text: proposal.text,
 5455                            delete_range: proposal.delete_range.and_then(|range| {
 5456                                let snapshot = self.buffer.read(cx).snapshot(cx);
 5457                                let start = snapshot.anchor_in_excerpt(excerpt_id, range.start);
 5458                                let end = snapshot.anchor_in_excerpt(excerpt_id, range.end);
 5459                                Some(start?..end?)
 5460                            }),
 5461                            render_inlay_ids: to_add.iter().map(|i| i.id).collect(),
 5462                        });
 5463
 5464                        self.display_map
 5465                            .update(cx, move |map, cx| map.splice_inlays(to_remove, to_add, cx));
 5466
 5467                        cx.notify();
 5468                        return;
 5469                    }
 5470                }
 5471            }
 5472        }
 5473
 5474        self.discard_inline_completion(false, cx);
 5475    }
 5476
 5477    fn inline_completion_provider(&self) -> Option<Arc<dyn InlineCompletionProviderHandle>> {
 5478        Some(self.inline_completion_provider.as_ref()?.provider.clone())
 5479    }
 5480
 5481    fn render_code_actions_indicator(
 5482        &self,
 5483        _style: &EditorStyle,
 5484        row: DisplayRow,
 5485        is_active: bool,
 5486        cx: &mut ViewContext<Self>,
 5487    ) -> Option<IconButton> {
 5488        if self.available_code_actions.is_some() {
 5489            Some(
 5490                IconButton::new("code_actions_indicator", ui::IconName::Bolt)
 5491                    .shape(ui::IconButtonShape::Square)
 5492                    .icon_size(IconSize::XSmall)
 5493                    .icon_color(Color::Muted)
 5494                    .selected(is_active)
 5495                    .tooltip({
 5496                        let focus_handle = self.focus_handle.clone();
 5497                        move |cx| {
 5498                            Tooltip::for_action_in(
 5499                                "Toggle Code Actions",
 5500                                &ToggleCodeActions {
 5501                                    deployed_from_indicator: None,
 5502                                },
 5503                                &focus_handle,
 5504                                cx,
 5505                            )
 5506                        }
 5507                    })
 5508                    .on_click(cx.listener(move |editor, _e, cx| {
 5509                        editor.focus(cx);
 5510                        editor.toggle_code_actions(
 5511                            &ToggleCodeActions {
 5512                                deployed_from_indicator: Some(row),
 5513                            },
 5514                            cx,
 5515                        );
 5516                    })),
 5517            )
 5518        } else {
 5519            None
 5520        }
 5521    }
 5522
 5523    fn clear_tasks(&mut self) {
 5524        self.tasks.clear()
 5525    }
 5526
 5527    fn insert_tasks(&mut self, key: (BufferId, BufferRow), value: RunnableTasks) {
 5528        if self.tasks.insert(key, value).is_some() {
 5529            // This case should hopefully be rare, but just in case...
 5530            log::error!("multiple different run targets found on a single line, only the last target will be rendered")
 5531        }
 5532    }
 5533
 5534    fn build_tasks_context(
 5535        project: &Model<Project>,
 5536        buffer: &Model<Buffer>,
 5537        buffer_row: u32,
 5538        tasks: &Arc<RunnableTasks>,
 5539        cx: &mut ViewContext<Self>,
 5540    ) -> Task<Option<task::TaskContext>> {
 5541        let position = Point::new(buffer_row, tasks.column);
 5542        let range_start = buffer.read(cx).anchor_at(position, Bias::Right);
 5543        let location = Location {
 5544            buffer: buffer.clone(),
 5545            range: range_start..range_start,
 5546        };
 5547        // Fill in the environmental variables from the tree-sitter captures
 5548        let mut captured_task_variables = TaskVariables::default();
 5549        for (capture_name, value) in tasks.extra_variables.clone() {
 5550            captured_task_variables.insert(
 5551                task::VariableName::Custom(capture_name.into()),
 5552                value.clone(),
 5553            );
 5554        }
 5555        project.update(cx, |project, cx| {
 5556            project.task_store().update(cx, |task_store, cx| {
 5557                task_store.task_context_for_location(captured_task_variables, location, cx)
 5558            })
 5559        })
 5560    }
 5561
 5562    pub fn spawn_nearest_task(&mut self, action: &SpawnNearestTask, cx: &mut ViewContext<Self>) {
 5563        let Some((workspace, _)) = self.workspace.clone() else {
 5564            return;
 5565        };
 5566        let Some(project) = self.project.clone() else {
 5567            return;
 5568        };
 5569
 5570        // Try to find a closest, enclosing node using tree-sitter that has a
 5571        // task
 5572        let Some((buffer, buffer_row, tasks)) = self
 5573            .find_enclosing_node_task(cx)
 5574            // Or find the task that's closest in row-distance.
 5575            .or_else(|| self.find_closest_task(cx))
 5576        else {
 5577            return;
 5578        };
 5579
 5580        let reveal_strategy = action.reveal;
 5581        let task_context = Self::build_tasks_context(&project, &buffer, buffer_row, &tasks, cx);
 5582        cx.spawn(|_, mut cx| async move {
 5583            let context = task_context.await?;
 5584            let (task_source_kind, mut resolved_task) = tasks.resolve(&context).next()?;
 5585
 5586            let resolved = resolved_task.resolved.as_mut()?;
 5587            resolved.reveal = reveal_strategy;
 5588
 5589            workspace
 5590                .update(&mut cx, |workspace, cx| {
 5591                    workspace::tasks::schedule_resolved_task(
 5592                        workspace,
 5593                        task_source_kind,
 5594                        resolved_task,
 5595                        false,
 5596                        cx,
 5597                    );
 5598                })
 5599                .ok()
 5600        })
 5601        .detach();
 5602    }
 5603
 5604    fn find_closest_task(
 5605        &mut self,
 5606        cx: &mut ViewContext<Self>,
 5607    ) -> Option<(Model<Buffer>, u32, Arc<RunnableTasks>)> {
 5608        let cursor_row = self.selections.newest_adjusted(cx).head().row;
 5609
 5610        let ((buffer_id, row), tasks) = self
 5611            .tasks
 5612            .iter()
 5613            .min_by_key(|((_, row), _)| cursor_row.abs_diff(*row))?;
 5614
 5615        let buffer = self.buffer.read(cx).buffer(*buffer_id)?;
 5616        let tasks = Arc::new(tasks.to_owned());
 5617        Some((buffer, *row, tasks))
 5618    }
 5619
 5620    fn find_enclosing_node_task(
 5621        &mut self,
 5622        cx: &mut ViewContext<Self>,
 5623    ) -> Option<(Model<Buffer>, u32, Arc<RunnableTasks>)> {
 5624        let snapshot = self.buffer.read(cx).snapshot(cx);
 5625        let offset = self.selections.newest::<usize>(cx).head();
 5626        let excerpt = snapshot.excerpt_containing(offset..offset)?;
 5627        let buffer_id = excerpt.buffer().remote_id();
 5628
 5629        let layer = excerpt.buffer().syntax_layer_at(offset)?;
 5630        let mut cursor = layer.node().walk();
 5631
 5632        while cursor.goto_first_child_for_byte(offset).is_some() {
 5633            if cursor.node().end_byte() == offset {
 5634                cursor.goto_next_sibling();
 5635            }
 5636        }
 5637
 5638        // Ascend to the smallest ancestor that contains the range and has a task.
 5639        loop {
 5640            let node = cursor.node();
 5641            let node_range = node.byte_range();
 5642            let symbol_start_row = excerpt.buffer().offset_to_point(node.start_byte()).row;
 5643
 5644            // Check if this node contains our offset
 5645            if node_range.start <= offset && node_range.end >= offset {
 5646                // If it contains offset, check for task
 5647                if let Some(tasks) = self.tasks.get(&(buffer_id, symbol_start_row)) {
 5648                    let buffer = self.buffer.read(cx).buffer(buffer_id)?;
 5649                    return Some((buffer, symbol_start_row, Arc::new(tasks.to_owned())));
 5650                }
 5651            }
 5652
 5653            if !cursor.goto_parent() {
 5654                break;
 5655            }
 5656        }
 5657        None
 5658    }
 5659
 5660    fn render_run_indicator(
 5661        &self,
 5662        _style: &EditorStyle,
 5663        is_active: bool,
 5664        row: DisplayRow,
 5665        cx: &mut ViewContext<Self>,
 5666    ) -> IconButton {
 5667        IconButton::new(("run_indicator", row.0 as usize), ui::IconName::Play)
 5668            .shape(ui::IconButtonShape::Square)
 5669            .icon_size(IconSize::XSmall)
 5670            .icon_color(Color::Muted)
 5671            .selected(is_active)
 5672            .on_click(cx.listener(move |editor, _e, cx| {
 5673                editor.focus(cx);
 5674                editor.toggle_code_actions(
 5675                    &ToggleCodeActions {
 5676                        deployed_from_indicator: Some(row),
 5677                    },
 5678                    cx,
 5679                );
 5680            }))
 5681    }
 5682
 5683    pub fn context_menu_visible(&self) -> bool {
 5684        self.context_menu
 5685            .read()
 5686            .as_ref()
 5687            .map_or(false, |menu| menu.visible())
 5688    }
 5689
 5690    fn render_context_menu(
 5691        &self,
 5692        cursor_position: DisplayPoint,
 5693        style: &EditorStyle,
 5694        max_height: Pixels,
 5695        cx: &mut ViewContext<Editor>,
 5696    ) -> Option<(ContextMenuOrigin, AnyElement)> {
 5697        self.context_menu.read().as_ref().map(|menu| {
 5698            menu.render(
 5699                cursor_position,
 5700                style,
 5701                max_height,
 5702                self.workspace.as_ref().map(|(w, _)| w.clone()),
 5703                cx,
 5704            )
 5705        })
 5706    }
 5707
 5708    fn hide_context_menu(&mut self, cx: &mut ViewContext<Self>) -> Option<ContextMenu> {
 5709        cx.notify();
 5710        self.completion_tasks.clear();
 5711        let context_menu = self.context_menu.write().take();
 5712        if context_menu.is_some() {
 5713            self.update_visible_inline_completion(cx);
 5714        }
 5715        context_menu
 5716    }
 5717
 5718    fn show_snippet_choices(
 5719        &mut self,
 5720        choices: &Vec<String>,
 5721        selection: Range<Anchor>,
 5722        cx: &mut ViewContext<Self>,
 5723    ) {
 5724        if selection.start.buffer_id.is_none() {
 5725            return;
 5726        }
 5727        let buffer_id = selection.start.buffer_id.unwrap();
 5728        let buffer = self.buffer().read(cx).buffer(buffer_id);
 5729        let id = post_inc(&mut self.next_completion_id);
 5730
 5731        if let Some(buffer) = buffer {
 5732            *self.context_menu.write() = Some(ContextMenu::Completions(
 5733                CompletionsMenu::new_snippet_choices(id, true, choices, selection, buffer)
 5734                    .suppress_documentation_resolution(),
 5735            ));
 5736        }
 5737    }
 5738
 5739    pub fn insert_snippet(
 5740        &mut self,
 5741        insertion_ranges: &[Range<usize>],
 5742        snippet: Snippet,
 5743        cx: &mut ViewContext<Self>,
 5744    ) -> Result<()> {
 5745        struct Tabstop<T> {
 5746            is_end_tabstop: bool,
 5747            ranges: Vec<Range<T>>,
 5748            choices: Option<Vec<String>>,
 5749        }
 5750
 5751        let tabstops = self.buffer.update(cx, |buffer, cx| {
 5752            let snippet_text: Arc<str> = snippet.text.clone().into();
 5753            buffer.edit(
 5754                insertion_ranges
 5755                    .iter()
 5756                    .cloned()
 5757                    .map(|range| (range, snippet_text.clone())),
 5758                Some(AutoindentMode::EachLine),
 5759                cx,
 5760            );
 5761
 5762            let snapshot = &*buffer.read(cx);
 5763            let snippet = &snippet;
 5764            snippet
 5765                .tabstops
 5766                .iter()
 5767                .map(|tabstop| {
 5768                    let is_end_tabstop = tabstop.ranges.first().map_or(false, |tabstop| {
 5769                        tabstop.is_empty() && tabstop.start == snippet.text.len() as isize
 5770                    });
 5771                    let mut tabstop_ranges = tabstop
 5772                        .ranges
 5773                        .iter()
 5774                        .flat_map(|tabstop_range| {
 5775                            let mut delta = 0_isize;
 5776                            insertion_ranges.iter().map(move |insertion_range| {
 5777                                let insertion_start = insertion_range.start as isize + delta;
 5778                                delta +=
 5779                                    snippet.text.len() as isize - insertion_range.len() as isize;
 5780
 5781                                let start = ((insertion_start + tabstop_range.start) as usize)
 5782                                    .min(snapshot.len());
 5783                                let end = ((insertion_start + tabstop_range.end) as usize)
 5784                                    .min(snapshot.len());
 5785                                snapshot.anchor_before(start)..snapshot.anchor_after(end)
 5786                            })
 5787                        })
 5788                        .collect::<Vec<_>>();
 5789                    tabstop_ranges.sort_unstable_by(|a, b| a.start.cmp(&b.start, snapshot));
 5790
 5791                    Tabstop {
 5792                        is_end_tabstop,
 5793                        ranges: tabstop_ranges,
 5794                        choices: tabstop.choices.clone(),
 5795                    }
 5796                })
 5797                .collect::<Vec<_>>()
 5798        });
 5799        if let Some(tabstop) = tabstops.first() {
 5800            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 5801                s.select_ranges(tabstop.ranges.iter().cloned());
 5802            });
 5803
 5804            if let Some(choices) = &tabstop.choices {
 5805                if let Some(selection) = tabstop.ranges.first() {
 5806                    self.show_snippet_choices(choices, selection.clone(), cx)
 5807                }
 5808            }
 5809
 5810            // If we're already at the last tabstop and it's at the end of the snippet,
 5811            // we're done, we don't need to keep the state around.
 5812            if !tabstop.is_end_tabstop {
 5813                let choices = tabstops
 5814                    .iter()
 5815                    .map(|tabstop| tabstop.choices.clone())
 5816                    .collect();
 5817
 5818                let ranges = tabstops
 5819                    .into_iter()
 5820                    .map(|tabstop| tabstop.ranges)
 5821                    .collect::<Vec<_>>();
 5822
 5823                self.snippet_stack.push(SnippetState {
 5824                    active_index: 0,
 5825                    ranges,
 5826                    choices,
 5827                });
 5828            }
 5829
 5830            // Check whether the just-entered snippet ends with an auto-closable bracket.
 5831            if self.autoclose_regions.is_empty() {
 5832                let snapshot = self.buffer.read(cx).snapshot(cx);
 5833                for selection in &mut self.selections.all::<Point>(cx) {
 5834                    let selection_head = selection.head();
 5835                    let Some(scope) = snapshot.language_scope_at(selection_head) else {
 5836                        continue;
 5837                    };
 5838
 5839                    let mut bracket_pair = None;
 5840                    let next_chars = snapshot.chars_at(selection_head).collect::<String>();
 5841                    let prev_chars = snapshot
 5842                        .reversed_chars_at(selection_head)
 5843                        .collect::<String>();
 5844                    for (pair, enabled) in scope.brackets() {
 5845                        if enabled
 5846                            && pair.close
 5847                            && prev_chars.starts_with(pair.start.as_str())
 5848                            && next_chars.starts_with(pair.end.as_str())
 5849                        {
 5850                            bracket_pair = Some(pair.clone());
 5851                            break;
 5852                        }
 5853                    }
 5854                    if let Some(pair) = bracket_pair {
 5855                        let start = snapshot.anchor_after(selection_head);
 5856                        let end = snapshot.anchor_after(selection_head);
 5857                        self.autoclose_regions.push(AutocloseRegion {
 5858                            selection_id: selection.id,
 5859                            range: start..end,
 5860                            pair,
 5861                        });
 5862                    }
 5863                }
 5864            }
 5865        }
 5866        Ok(())
 5867    }
 5868
 5869    pub fn move_to_next_snippet_tabstop(&mut self, cx: &mut ViewContext<Self>) -> bool {
 5870        self.move_to_snippet_tabstop(Bias::Right, cx)
 5871    }
 5872
 5873    pub fn move_to_prev_snippet_tabstop(&mut self, cx: &mut ViewContext<Self>) -> bool {
 5874        self.move_to_snippet_tabstop(Bias::Left, cx)
 5875    }
 5876
 5877    pub fn move_to_snippet_tabstop(&mut self, bias: Bias, cx: &mut ViewContext<Self>) -> bool {
 5878        if let Some(mut snippet) = self.snippet_stack.pop() {
 5879            match bias {
 5880                Bias::Left => {
 5881                    if snippet.active_index > 0 {
 5882                        snippet.active_index -= 1;
 5883                    } else {
 5884                        self.snippet_stack.push(snippet);
 5885                        return false;
 5886                    }
 5887                }
 5888                Bias::Right => {
 5889                    if snippet.active_index + 1 < snippet.ranges.len() {
 5890                        snippet.active_index += 1;
 5891                    } else {
 5892                        self.snippet_stack.push(snippet);
 5893                        return false;
 5894                    }
 5895                }
 5896            }
 5897            if let Some(current_ranges) = snippet.ranges.get(snippet.active_index) {
 5898                self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 5899                    s.select_anchor_ranges(current_ranges.iter().cloned())
 5900                });
 5901
 5902                if let Some(choices) = &snippet.choices[snippet.active_index] {
 5903                    if let Some(selection) = current_ranges.first() {
 5904                        self.show_snippet_choices(&choices, selection.clone(), cx);
 5905                    }
 5906                }
 5907
 5908                // If snippet state is not at the last tabstop, push it back on the stack
 5909                if snippet.active_index + 1 < snippet.ranges.len() {
 5910                    self.snippet_stack.push(snippet);
 5911                }
 5912                return true;
 5913            }
 5914        }
 5915
 5916        false
 5917    }
 5918
 5919    pub fn clear(&mut self, cx: &mut ViewContext<Self>) {
 5920        self.transact(cx, |this, cx| {
 5921            this.select_all(&SelectAll, cx);
 5922            this.insert("", cx);
 5923        });
 5924    }
 5925
 5926    pub fn backspace(&mut self, _: &Backspace, cx: &mut ViewContext<Self>) {
 5927        self.transact(cx, |this, cx| {
 5928            this.select_autoclose_pair(cx);
 5929            let mut linked_ranges = HashMap::<_, Vec<_>>::default();
 5930            if !this.linked_edit_ranges.is_empty() {
 5931                let selections = this.selections.all::<MultiBufferPoint>(cx);
 5932                let snapshot = this.buffer.read(cx).snapshot(cx);
 5933
 5934                for selection in selections.iter() {
 5935                    let selection_start = snapshot.anchor_before(selection.start).text_anchor;
 5936                    let selection_end = snapshot.anchor_after(selection.end).text_anchor;
 5937                    if selection_start.buffer_id != selection_end.buffer_id {
 5938                        continue;
 5939                    }
 5940                    if let Some(ranges) =
 5941                        this.linked_editing_ranges_for(selection_start..selection_end, cx)
 5942                    {
 5943                        for (buffer, entries) in ranges {
 5944                            linked_ranges.entry(buffer).or_default().extend(entries);
 5945                        }
 5946                    }
 5947                }
 5948            }
 5949
 5950            let mut selections = this.selections.all::<MultiBufferPoint>(cx);
 5951            if !this.selections.line_mode {
 5952                let display_map = this.display_map.update(cx, |map, cx| map.snapshot(cx));
 5953                for selection in &mut selections {
 5954                    if selection.is_empty() {
 5955                        let old_head = selection.head();
 5956                        let mut new_head =
 5957                            movement::left(&display_map, old_head.to_display_point(&display_map))
 5958                                .to_point(&display_map);
 5959                        if let Some((buffer, line_buffer_range)) = display_map
 5960                            .buffer_snapshot
 5961                            .buffer_line_for_row(MultiBufferRow(old_head.row))
 5962                        {
 5963                            let indent_size =
 5964                                buffer.indent_size_for_line(line_buffer_range.start.row);
 5965                            let indent_len = match indent_size.kind {
 5966                                IndentKind::Space => {
 5967                                    buffer.settings_at(line_buffer_range.start, cx).tab_size
 5968                                }
 5969                                IndentKind::Tab => NonZeroU32::new(1).unwrap(),
 5970                            };
 5971                            if old_head.column <= indent_size.len && old_head.column > 0 {
 5972                                let indent_len = indent_len.get();
 5973                                new_head = cmp::min(
 5974                                    new_head,
 5975                                    MultiBufferPoint::new(
 5976                                        old_head.row,
 5977                                        ((old_head.column - 1) / indent_len) * indent_len,
 5978                                    ),
 5979                                );
 5980                            }
 5981                        }
 5982
 5983                        selection.set_head(new_head, SelectionGoal::None);
 5984                    }
 5985                }
 5986            }
 5987
 5988            this.signature_help_state.set_backspace_pressed(true);
 5989            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 5990            this.insert("", cx);
 5991            let empty_str: Arc<str> = Arc::from("");
 5992            for (buffer, edits) in linked_ranges {
 5993                let snapshot = buffer.read(cx).snapshot();
 5994                use text::ToPoint as TP;
 5995
 5996                let edits = edits
 5997                    .into_iter()
 5998                    .map(|range| {
 5999                        let end_point = TP::to_point(&range.end, &snapshot);
 6000                        let mut start_point = TP::to_point(&range.start, &snapshot);
 6001
 6002                        if end_point == start_point {
 6003                            let offset = text::ToOffset::to_offset(&range.start, &snapshot)
 6004                                .saturating_sub(1);
 6005                            start_point = TP::to_point(&offset, &snapshot);
 6006                        };
 6007
 6008                        (start_point..end_point, empty_str.clone())
 6009                    })
 6010                    .sorted_by_key(|(range, _)| range.start)
 6011                    .collect::<Vec<_>>();
 6012                buffer.update(cx, |this, cx| {
 6013                    this.edit(edits, None, cx);
 6014                })
 6015            }
 6016            this.refresh_inline_completion(true, false, cx);
 6017            linked_editing_ranges::refresh_linked_ranges(this, cx);
 6018        });
 6019    }
 6020
 6021    pub fn delete(&mut self, _: &Delete, cx: &mut ViewContext<Self>) {
 6022        self.transact(cx, |this, cx| {
 6023            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6024                let line_mode = s.line_mode;
 6025                s.move_with(|map, selection| {
 6026                    if selection.is_empty() && !line_mode {
 6027                        let cursor = movement::right(map, selection.head());
 6028                        selection.end = cursor;
 6029                        selection.reversed = true;
 6030                        selection.goal = SelectionGoal::None;
 6031                    }
 6032                })
 6033            });
 6034            this.insert("", cx);
 6035            this.refresh_inline_completion(true, false, cx);
 6036        });
 6037    }
 6038
 6039    pub fn tab_prev(&mut self, _: &TabPrev, cx: &mut ViewContext<Self>) {
 6040        if self.move_to_prev_snippet_tabstop(cx) {
 6041            return;
 6042        }
 6043
 6044        self.outdent(&Outdent, cx);
 6045    }
 6046
 6047    pub fn tab(&mut self, _: &Tab, cx: &mut ViewContext<Self>) {
 6048        if self.move_to_next_snippet_tabstop(cx) || self.read_only(cx) {
 6049            return;
 6050        }
 6051
 6052        let mut selections = self.selections.all_adjusted(cx);
 6053        let buffer = self.buffer.read(cx);
 6054        let snapshot = buffer.snapshot(cx);
 6055        let rows_iter = selections.iter().map(|s| s.head().row);
 6056        let suggested_indents = snapshot.suggested_indents(rows_iter, cx);
 6057
 6058        let mut edits = Vec::new();
 6059        let mut prev_edited_row = 0;
 6060        let mut row_delta = 0;
 6061        for selection in &mut selections {
 6062            if selection.start.row != prev_edited_row {
 6063                row_delta = 0;
 6064            }
 6065            prev_edited_row = selection.end.row;
 6066
 6067            // If the selection is non-empty, then increase the indentation of the selected lines.
 6068            if !selection.is_empty() {
 6069                row_delta =
 6070                    Self::indent_selection(buffer, &snapshot, selection, &mut edits, row_delta, cx);
 6071                continue;
 6072            }
 6073
 6074            // If the selection is empty and the cursor is in the leading whitespace before the
 6075            // suggested indentation, then auto-indent the line.
 6076            let cursor = selection.head();
 6077            let current_indent = snapshot.indent_size_for_line(MultiBufferRow(cursor.row));
 6078            if let Some(suggested_indent) =
 6079                suggested_indents.get(&MultiBufferRow(cursor.row)).copied()
 6080            {
 6081                if cursor.column < suggested_indent.len
 6082                    && cursor.column <= current_indent.len
 6083                    && current_indent.len <= suggested_indent.len
 6084                {
 6085                    selection.start = Point::new(cursor.row, suggested_indent.len);
 6086                    selection.end = selection.start;
 6087                    if row_delta == 0 {
 6088                        edits.extend(Buffer::edit_for_indent_size_adjustment(
 6089                            cursor.row,
 6090                            current_indent,
 6091                            suggested_indent,
 6092                        ));
 6093                        row_delta = suggested_indent.len - current_indent.len;
 6094                    }
 6095                    continue;
 6096                }
 6097            }
 6098
 6099            // Otherwise, insert a hard or soft tab.
 6100            let settings = buffer.settings_at(cursor, cx);
 6101            let tab_size = if settings.hard_tabs {
 6102                IndentSize::tab()
 6103            } else {
 6104                let tab_size = settings.tab_size.get();
 6105                let char_column = snapshot
 6106                    .text_for_range(Point::new(cursor.row, 0)..cursor)
 6107                    .flat_map(str::chars)
 6108                    .count()
 6109                    + row_delta as usize;
 6110                let chars_to_next_tab_stop = tab_size - (char_column as u32 % tab_size);
 6111                IndentSize::spaces(chars_to_next_tab_stop)
 6112            };
 6113            selection.start = Point::new(cursor.row, cursor.column + row_delta + tab_size.len);
 6114            selection.end = selection.start;
 6115            edits.push((cursor..cursor, tab_size.chars().collect::<String>()));
 6116            row_delta += tab_size.len;
 6117        }
 6118
 6119        self.transact(cx, |this, cx| {
 6120            this.buffer.update(cx, |b, cx| b.edit(edits, None, cx));
 6121            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 6122            this.refresh_inline_completion(true, false, cx);
 6123        });
 6124    }
 6125
 6126    pub fn indent(&mut self, _: &Indent, cx: &mut ViewContext<Self>) {
 6127        if self.read_only(cx) {
 6128            return;
 6129        }
 6130        let mut selections = self.selections.all::<Point>(cx);
 6131        let mut prev_edited_row = 0;
 6132        let mut row_delta = 0;
 6133        let mut edits = Vec::new();
 6134        let buffer = self.buffer.read(cx);
 6135        let snapshot = buffer.snapshot(cx);
 6136        for selection in &mut selections {
 6137            if selection.start.row != prev_edited_row {
 6138                row_delta = 0;
 6139            }
 6140            prev_edited_row = selection.end.row;
 6141
 6142            row_delta =
 6143                Self::indent_selection(buffer, &snapshot, selection, &mut edits, row_delta, cx);
 6144        }
 6145
 6146        self.transact(cx, |this, cx| {
 6147            this.buffer.update(cx, |b, cx| b.edit(edits, None, cx));
 6148            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 6149        });
 6150    }
 6151
 6152    fn indent_selection(
 6153        buffer: &MultiBuffer,
 6154        snapshot: &MultiBufferSnapshot,
 6155        selection: &mut Selection<Point>,
 6156        edits: &mut Vec<(Range<Point>, String)>,
 6157        delta_for_start_row: u32,
 6158        cx: &AppContext,
 6159    ) -> u32 {
 6160        let settings = buffer.settings_at(selection.start, cx);
 6161        let tab_size = settings.tab_size.get();
 6162        let indent_kind = if settings.hard_tabs {
 6163            IndentKind::Tab
 6164        } else {
 6165            IndentKind::Space
 6166        };
 6167        let mut start_row = selection.start.row;
 6168        let mut end_row = selection.end.row + 1;
 6169
 6170        // If a selection ends at the beginning of a line, don't indent
 6171        // that last line.
 6172        if selection.end.column == 0 && selection.end.row > selection.start.row {
 6173            end_row -= 1;
 6174        }
 6175
 6176        // Avoid re-indenting a row that has already been indented by a
 6177        // previous selection, but still update this selection's column
 6178        // to reflect that indentation.
 6179        if delta_for_start_row > 0 {
 6180            start_row += 1;
 6181            selection.start.column += delta_for_start_row;
 6182            if selection.end.row == selection.start.row {
 6183                selection.end.column += delta_for_start_row;
 6184            }
 6185        }
 6186
 6187        let mut delta_for_end_row = 0;
 6188        let has_multiple_rows = start_row + 1 != end_row;
 6189        for row in start_row..end_row {
 6190            let current_indent = snapshot.indent_size_for_line(MultiBufferRow(row));
 6191            let indent_delta = match (current_indent.kind, indent_kind) {
 6192                (IndentKind::Space, IndentKind::Space) => {
 6193                    let columns_to_next_tab_stop = tab_size - (current_indent.len % tab_size);
 6194                    IndentSize::spaces(columns_to_next_tab_stop)
 6195                }
 6196                (IndentKind::Tab, IndentKind::Space) => IndentSize::spaces(tab_size),
 6197                (_, IndentKind::Tab) => IndentSize::tab(),
 6198            };
 6199
 6200            let start = if has_multiple_rows || current_indent.len < selection.start.column {
 6201                0
 6202            } else {
 6203                selection.start.column
 6204            };
 6205            let row_start = Point::new(row, start);
 6206            edits.push((
 6207                row_start..row_start,
 6208                indent_delta.chars().collect::<String>(),
 6209            ));
 6210
 6211            // Update this selection's endpoints to reflect the indentation.
 6212            if row == selection.start.row {
 6213                selection.start.column += indent_delta.len;
 6214            }
 6215            if row == selection.end.row {
 6216                selection.end.column += indent_delta.len;
 6217                delta_for_end_row = indent_delta.len;
 6218            }
 6219        }
 6220
 6221        if selection.start.row == selection.end.row {
 6222            delta_for_start_row + delta_for_end_row
 6223        } else {
 6224            delta_for_end_row
 6225        }
 6226    }
 6227
 6228    pub fn outdent(&mut self, _: &Outdent, cx: &mut ViewContext<Self>) {
 6229        if self.read_only(cx) {
 6230            return;
 6231        }
 6232        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6233        let selections = self.selections.all::<Point>(cx);
 6234        let mut deletion_ranges = Vec::new();
 6235        let mut last_outdent = None;
 6236        {
 6237            let buffer = self.buffer.read(cx);
 6238            let snapshot = buffer.snapshot(cx);
 6239            for selection in &selections {
 6240                let settings = buffer.settings_at(selection.start, cx);
 6241                let tab_size = settings.tab_size.get();
 6242                let mut rows = selection.spanned_rows(false, &display_map);
 6243
 6244                // Avoid re-outdenting a row that has already been outdented by a
 6245                // previous selection.
 6246                if let Some(last_row) = last_outdent {
 6247                    if last_row == rows.start {
 6248                        rows.start = rows.start.next_row();
 6249                    }
 6250                }
 6251                let has_multiple_rows = rows.len() > 1;
 6252                for row in rows.iter_rows() {
 6253                    let indent_size = snapshot.indent_size_for_line(row);
 6254                    if indent_size.len > 0 {
 6255                        let deletion_len = match indent_size.kind {
 6256                            IndentKind::Space => {
 6257                                let columns_to_prev_tab_stop = indent_size.len % tab_size;
 6258                                if columns_to_prev_tab_stop == 0 {
 6259                                    tab_size
 6260                                } else {
 6261                                    columns_to_prev_tab_stop
 6262                                }
 6263                            }
 6264                            IndentKind::Tab => 1,
 6265                        };
 6266                        let start = if has_multiple_rows
 6267                            || deletion_len > selection.start.column
 6268                            || indent_size.len < selection.start.column
 6269                        {
 6270                            0
 6271                        } else {
 6272                            selection.start.column - deletion_len
 6273                        };
 6274                        deletion_ranges.push(
 6275                            Point::new(row.0, start)..Point::new(row.0, start + deletion_len),
 6276                        );
 6277                        last_outdent = Some(row);
 6278                    }
 6279                }
 6280            }
 6281        }
 6282
 6283        self.transact(cx, |this, cx| {
 6284            this.buffer.update(cx, |buffer, cx| {
 6285                let empty_str: Arc<str> = Arc::default();
 6286                buffer.edit(
 6287                    deletion_ranges
 6288                        .into_iter()
 6289                        .map(|range| (range, empty_str.clone())),
 6290                    None,
 6291                    cx,
 6292                );
 6293            });
 6294            let selections = this.selections.all::<usize>(cx);
 6295            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 6296        });
 6297    }
 6298
 6299    pub fn delete_line(&mut self, _: &DeleteLine, cx: &mut ViewContext<Self>) {
 6300        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6301        let selections = self.selections.all::<Point>(cx);
 6302
 6303        let mut new_cursors = Vec::new();
 6304        let mut edit_ranges = Vec::new();
 6305        let mut selections = selections.iter().peekable();
 6306        while let Some(selection) = selections.next() {
 6307            let mut rows = selection.spanned_rows(false, &display_map);
 6308            let goal_display_column = selection.head().to_display_point(&display_map).column();
 6309
 6310            // Accumulate contiguous regions of rows that we want to delete.
 6311            while let Some(next_selection) = selections.peek() {
 6312                let next_rows = next_selection.spanned_rows(false, &display_map);
 6313                if next_rows.start <= rows.end {
 6314                    rows.end = next_rows.end;
 6315                    selections.next().unwrap();
 6316                } else {
 6317                    break;
 6318                }
 6319            }
 6320
 6321            let buffer = &display_map.buffer_snapshot;
 6322            let mut edit_start = Point::new(rows.start.0, 0).to_offset(buffer);
 6323            let edit_end;
 6324            let cursor_buffer_row;
 6325            if buffer.max_point().row >= rows.end.0 {
 6326                // If there's a line after the range, delete the \n from the end of the row range
 6327                // and position the cursor on the next line.
 6328                edit_end = Point::new(rows.end.0, 0).to_offset(buffer);
 6329                cursor_buffer_row = rows.end;
 6330            } else {
 6331                // If there isn't a line after the range, delete the \n from the line before the
 6332                // start of the row range and position the cursor there.
 6333                edit_start = edit_start.saturating_sub(1);
 6334                edit_end = buffer.len();
 6335                cursor_buffer_row = rows.start.previous_row();
 6336            }
 6337
 6338            let mut cursor = Point::new(cursor_buffer_row.0, 0).to_display_point(&display_map);
 6339            *cursor.column_mut() =
 6340                cmp::min(goal_display_column, display_map.line_len(cursor.row()));
 6341
 6342            new_cursors.push((
 6343                selection.id,
 6344                buffer.anchor_after(cursor.to_point(&display_map)),
 6345            ));
 6346            edit_ranges.push(edit_start..edit_end);
 6347        }
 6348
 6349        self.transact(cx, |this, cx| {
 6350            let buffer = this.buffer.update(cx, |buffer, cx| {
 6351                let empty_str: Arc<str> = Arc::default();
 6352                buffer.edit(
 6353                    edit_ranges
 6354                        .into_iter()
 6355                        .map(|range| (range, empty_str.clone())),
 6356                    None,
 6357                    cx,
 6358                );
 6359                buffer.snapshot(cx)
 6360            });
 6361            let new_selections = new_cursors
 6362                .into_iter()
 6363                .map(|(id, cursor)| {
 6364                    let cursor = cursor.to_point(&buffer);
 6365                    Selection {
 6366                        id,
 6367                        start: cursor,
 6368                        end: cursor,
 6369                        reversed: false,
 6370                        goal: SelectionGoal::None,
 6371                    }
 6372                })
 6373                .collect();
 6374
 6375            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6376                s.select(new_selections);
 6377            });
 6378        });
 6379    }
 6380
 6381    pub fn join_lines(&mut self, _: &JoinLines, cx: &mut ViewContext<Self>) {
 6382        if self.read_only(cx) {
 6383            return;
 6384        }
 6385        let mut row_ranges = Vec::<Range<MultiBufferRow>>::new();
 6386        for selection in self.selections.all::<Point>(cx) {
 6387            let start = MultiBufferRow(selection.start.row);
 6388            // Treat single line selections as if they include the next line. Otherwise this action
 6389            // would do nothing for single line selections individual cursors.
 6390            let end = if selection.start.row == selection.end.row {
 6391                MultiBufferRow(selection.start.row + 1)
 6392            } else {
 6393                MultiBufferRow(selection.end.row)
 6394            };
 6395
 6396            if let Some(last_row_range) = row_ranges.last_mut() {
 6397                if start <= last_row_range.end {
 6398                    last_row_range.end = end;
 6399                    continue;
 6400                }
 6401            }
 6402            row_ranges.push(start..end);
 6403        }
 6404
 6405        let snapshot = self.buffer.read(cx).snapshot(cx);
 6406        let mut cursor_positions = Vec::new();
 6407        for row_range in &row_ranges {
 6408            let anchor = snapshot.anchor_before(Point::new(
 6409                row_range.end.previous_row().0,
 6410                snapshot.line_len(row_range.end.previous_row()),
 6411            ));
 6412            cursor_positions.push(anchor..anchor);
 6413        }
 6414
 6415        self.transact(cx, |this, cx| {
 6416            for row_range in row_ranges.into_iter().rev() {
 6417                for row in row_range.iter_rows().rev() {
 6418                    let end_of_line = Point::new(row.0, snapshot.line_len(row));
 6419                    let next_line_row = row.next_row();
 6420                    let indent = snapshot.indent_size_for_line(next_line_row);
 6421                    let start_of_next_line = Point::new(next_line_row.0, indent.len);
 6422
 6423                    let replace = if snapshot.line_len(next_line_row) > indent.len {
 6424                        " "
 6425                    } else {
 6426                        ""
 6427                    };
 6428
 6429                    this.buffer.update(cx, |buffer, cx| {
 6430                        buffer.edit([(end_of_line..start_of_next_line, replace)], None, cx)
 6431                    });
 6432                }
 6433            }
 6434
 6435            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6436                s.select_anchor_ranges(cursor_positions)
 6437            });
 6438        });
 6439    }
 6440
 6441    pub fn sort_lines_case_sensitive(
 6442        &mut self,
 6443        _: &SortLinesCaseSensitive,
 6444        cx: &mut ViewContext<Self>,
 6445    ) {
 6446        self.manipulate_lines(cx, |lines| lines.sort())
 6447    }
 6448
 6449    pub fn sort_lines_case_insensitive(
 6450        &mut self,
 6451        _: &SortLinesCaseInsensitive,
 6452        cx: &mut ViewContext<Self>,
 6453    ) {
 6454        self.manipulate_lines(cx, |lines| lines.sort_by_key(|line| line.to_lowercase()))
 6455    }
 6456
 6457    pub fn unique_lines_case_insensitive(
 6458        &mut self,
 6459        _: &UniqueLinesCaseInsensitive,
 6460        cx: &mut ViewContext<Self>,
 6461    ) {
 6462        self.manipulate_lines(cx, |lines| {
 6463            let mut seen = HashSet::default();
 6464            lines.retain(|line| seen.insert(line.to_lowercase()));
 6465        })
 6466    }
 6467
 6468    pub fn unique_lines_case_sensitive(
 6469        &mut self,
 6470        _: &UniqueLinesCaseSensitive,
 6471        cx: &mut ViewContext<Self>,
 6472    ) {
 6473        self.manipulate_lines(cx, |lines| {
 6474            let mut seen = HashSet::default();
 6475            lines.retain(|line| seen.insert(*line));
 6476        })
 6477    }
 6478
 6479    pub fn revert_file(&mut self, _: &RevertFile, cx: &mut ViewContext<Self>) {
 6480        let mut revert_changes = HashMap::default();
 6481        let multi_buffer_snapshot = self.buffer.read(cx).snapshot(cx);
 6482        for hunk in hunks_for_rows(
 6483            Some(MultiBufferRow(0)..multi_buffer_snapshot.max_buffer_row()).into_iter(),
 6484            &multi_buffer_snapshot,
 6485        ) {
 6486            Self::prepare_revert_change(&mut revert_changes, self.buffer(), &hunk, cx);
 6487        }
 6488        if !revert_changes.is_empty() {
 6489            self.transact(cx, |editor, cx| {
 6490                editor.revert(revert_changes, cx);
 6491            });
 6492        }
 6493    }
 6494
 6495    pub fn reload_file(&mut self, _: &ReloadFile, cx: &mut ViewContext<Self>) {
 6496        let Some(project) = self.project.clone() else {
 6497            return;
 6498        };
 6499        self.reload(project, cx).detach_and_notify_err(cx);
 6500    }
 6501
 6502    pub fn revert_selected_hunks(&mut self, _: &RevertSelectedHunks, cx: &mut ViewContext<Self>) {
 6503        let revert_changes = self.gather_revert_changes(&self.selections.disjoint_anchors(), cx);
 6504        if !revert_changes.is_empty() {
 6505            self.transact(cx, |editor, cx| {
 6506                editor.revert(revert_changes, cx);
 6507            });
 6508        }
 6509    }
 6510
 6511    pub fn open_active_item_in_terminal(&mut self, _: &OpenInTerminal, cx: &mut ViewContext<Self>) {
 6512        if let Some(working_directory) = self.active_excerpt(cx).and_then(|(_, buffer, _)| {
 6513            let project_path = buffer.read(cx).project_path(cx)?;
 6514            let project = self.project.as_ref()?.read(cx);
 6515            let entry = project.entry_for_path(&project_path, cx)?;
 6516            let parent = match &entry.canonical_path {
 6517                Some(canonical_path) => canonical_path.to_path_buf(),
 6518                None => project.absolute_path(&project_path, cx)?,
 6519            }
 6520            .parent()?
 6521            .to_path_buf();
 6522            Some(parent)
 6523        }) {
 6524            cx.dispatch_action(OpenTerminal { working_directory }.boxed_clone());
 6525        }
 6526    }
 6527
 6528    fn gather_revert_changes(
 6529        &mut self,
 6530        selections: &[Selection<Anchor>],
 6531        cx: &mut ViewContext<'_, Editor>,
 6532    ) -> HashMap<BufferId, Vec<(Range<text::Anchor>, Rope)>> {
 6533        let mut revert_changes = HashMap::default();
 6534        let multi_buffer_snapshot = self.buffer.read(cx).snapshot(cx);
 6535        for hunk in hunks_for_selections(&multi_buffer_snapshot, selections) {
 6536            Self::prepare_revert_change(&mut revert_changes, self.buffer(), &hunk, cx);
 6537        }
 6538        revert_changes
 6539    }
 6540
 6541    pub fn prepare_revert_change(
 6542        revert_changes: &mut HashMap<BufferId, Vec<(Range<text::Anchor>, Rope)>>,
 6543        multi_buffer: &Model<MultiBuffer>,
 6544        hunk: &MultiBufferDiffHunk,
 6545        cx: &AppContext,
 6546    ) -> Option<()> {
 6547        let buffer = multi_buffer.read(cx).buffer(hunk.buffer_id)?;
 6548        let buffer = buffer.read(cx);
 6549        let original_text = buffer.diff_base()?.slice(hunk.diff_base_byte_range.clone());
 6550        let buffer_snapshot = buffer.snapshot();
 6551        let buffer_revert_changes = revert_changes.entry(buffer.remote_id()).or_default();
 6552        if let Err(i) = buffer_revert_changes.binary_search_by(|probe| {
 6553            probe
 6554                .0
 6555                .start
 6556                .cmp(&hunk.buffer_range.start, &buffer_snapshot)
 6557                .then(probe.0.end.cmp(&hunk.buffer_range.end, &buffer_snapshot))
 6558        }) {
 6559            buffer_revert_changes.insert(i, (hunk.buffer_range.clone(), original_text));
 6560            Some(())
 6561        } else {
 6562            None
 6563        }
 6564    }
 6565
 6566    pub fn reverse_lines(&mut self, _: &ReverseLines, cx: &mut ViewContext<Self>) {
 6567        self.manipulate_lines(cx, |lines| lines.reverse())
 6568    }
 6569
 6570    pub fn shuffle_lines(&mut self, _: &ShuffleLines, cx: &mut ViewContext<Self>) {
 6571        self.manipulate_lines(cx, |lines| lines.shuffle(&mut thread_rng()))
 6572    }
 6573
 6574    fn manipulate_lines<Fn>(&mut self, cx: &mut ViewContext<Self>, mut callback: Fn)
 6575    where
 6576        Fn: FnMut(&mut Vec<&str>),
 6577    {
 6578        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6579        let buffer = self.buffer.read(cx).snapshot(cx);
 6580
 6581        let mut edits = Vec::new();
 6582
 6583        let selections = self.selections.all::<Point>(cx);
 6584        let mut selections = selections.iter().peekable();
 6585        let mut contiguous_row_selections = Vec::new();
 6586        let mut new_selections = Vec::new();
 6587        let mut added_lines = 0;
 6588        let mut removed_lines = 0;
 6589
 6590        while let Some(selection) = selections.next() {
 6591            let (start_row, end_row) = consume_contiguous_rows(
 6592                &mut contiguous_row_selections,
 6593                selection,
 6594                &display_map,
 6595                &mut selections,
 6596            );
 6597
 6598            let start_point = Point::new(start_row.0, 0);
 6599            let end_point = Point::new(
 6600                end_row.previous_row().0,
 6601                buffer.line_len(end_row.previous_row()),
 6602            );
 6603            let text = buffer
 6604                .text_for_range(start_point..end_point)
 6605                .collect::<String>();
 6606
 6607            let mut lines = text.split('\n').collect_vec();
 6608
 6609            let lines_before = lines.len();
 6610            callback(&mut lines);
 6611            let lines_after = lines.len();
 6612
 6613            edits.push((start_point..end_point, lines.join("\n")));
 6614
 6615            // Selections must change based on added and removed line count
 6616            let start_row =
 6617                MultiBufferRow(start_point.row + added_lines as u32 - removed_lines as u32);
 6618            let end_row = MultiBufferRow(start_row.0 + lines_after.saturating_sub(1) as u32);
 6619            new_selections.push(Selection {
 6620                id: selection.id,
 6621                start: start_row,
 6622                end: end_row,
 6623                goal: SelectionGoal::None,
 6624                reversed: selection.reversed,
 6625            });
 6626
 6627            if lines_after > lines_before {
 6628                added_lines += lines_after - lines_before;
 6629            } else if lines_before > lines_after {
 6630                removed_lines += lines_before - lines_after;
 6631            }
 6632        }
 6633
 6634        self.transact(cx, |this, cx| {
 6635            let buffer = this.buffer.update(cx, |buffer, cx| {
 6636                buffer.edit(edits, None, cx);
 6637                buffer.snapshot(cx)
 6638            });
 6639
 6640            // Recalculate offsets on newly edited buffer
 6641            let new_selections = new_selections
 6642                .iter()
 6643                .map(|s| {
 6644                    let start_point = Point::new(s.start.0, 0);
 6645                    let end_point = Point::new(s.end.0, buffer.line_len(s.end));
 6646                    Selection {
 6647                        id: s.id,
 6648                        start: buffer.point_to_offset(start_point),
 6649                        end: buffer.point_to_offset(end_point),
 6650                        goal: s.goal,
 6651                        reversed: s.reversed,
 6652                    }
 6653                })
 6654                .collect();
 6655
 6656            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6657                s.select(new_selections);
 6658            });
 6659
 6660            this.request_autoscroll(Autoscroll::fit(), cx);
 6661        });
 6662    }
 6663
 6664    pub fn convert_to_upper_case(&mut self, _: &ConvertToUpperCase, cx: &mut ViewContext<Self>) {
 6665        self.manipulate_text(cx, |text| text.to_uppercase())
 6666    }
 6667
 6668    pub fn convert_to_lower_case(&mut self, _: &ConvertToLowerCase, cx: &mut ViewContext<Self>) {
 6669        self.manipulate_text(cx, |text| text.to_lowercase())
 6670    }
 6671
 6672    pub fn convert_to_title_case(&mut self, _: &ConvertToTitleCase, cx: &mut ViewContext<Self>) {
 6673        self.manipulate_text(cx, |text| {
 6674            // Hack to get around the fact that to_case crate doesn't support '\n' as a word boundary
 6675            // https://github.com/rutrum/convert-case/issues/16
 6676            text.split('\n')
 6677                .map(|line| line.to_case(Case::Title))
 6678                .join("\n")
 6679        })
 6680    }
 6681
 6682    pub fn convert_to_snake_case(&mut self, _: &ConvertToSnakeCase, cx: &mut ViewContext<Self>) {
 6683        self.manipulate_text(cx, |text| text.to_case(Case::Snake))
 6684    }
 6685
 6686    pub fn convert_to_kebab_case(&mut self, _: &ConvertToKebabCase, cx: &mut ViewContext<Self>) {
 6687        self.manipulate_text(cx, |text| text.to_case(Case::Kebab))
 6688    }
 6689
 6690    pub fn convert_to_upper_camel_case(
 6691        &mut self,
 6692        _: &ConvertToUpperCamelCase,
 6693        cx: &mut ViewContext<Self>,
 6694    ) {
 6695        self.manipulate_text(cx, |text| {
 6696            // Hack to get around the fact that to_case crate doesn't support '\n' as a word boundary
 6697            // https://github.com/rutrum/convert-case/issues/16
 6698            text.split('\n')
 6699                .map(|line| line.to_case(Case::UpperCamel))
 6700                .join("\n")
 6701        })
 6702    }
 6703
 6704    pub fn convert_to_lower_camel_case(
 6705        &mut self,
 6706        _: &ConvertToLowerCamelCase,
 6707        cx: &mut ViewContext<Self>,
 6708    ) {
 6709        self.manipulate_text(cx, |text| text.to_case(Case::Camel))
 6710    }
 6711
 6712    pub fn convert_to_opposite_case(
 6713        &mut self,
 6714        _: &ConvertToOppositeCase,
 6715        cx: &mut ViewContext<Self>,
 6716    ) {
 6717        self.manipulate_text(cx, |text| {
 6718            text.chars()
 6719                .fold(String::with_capacity(text.len()), |mut t, c| {
 6720                    if c.is_uppercase() {
 6721                        t.extend(c.to_lowercase());
 6722                    } else {
 6723                        t.extend(c.to_uppercase());
 6724                    }
 6725                    t
 6726                })
 6727        })
 6728    }
 6729
 6730    fn manipulate_text<Fn>(&mut self, cx: &mut ViewContext<Self>, mut callback: Fn)
 6731    where
 6732        Fn: FnMut(&str) -> String,
 6733    {
 6734        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6735        let buffer = self.buffer.read(cx).snapshot(cx);
 6736
 6737        let mut new_selections = Vec::new();
 6738        let mut edits = Vec::new();
 6739        let mut selection_adjustment = 0i32;
 6740
 6741        for selection in self.selections.all::<usize>(cx) {
 6742            let selection_is_empty = selection.is_empty();
 6743
 6744            let (start, end) = if selection_is_empty {
 6745                let word_range = movement::surrounding_word(
 6746                    &display_map,
 6747                    selection.start.to_display_point(&display_map),
 6748                );
 6749                let start = word_range.start.to_offset(&display_map, Bias::Left);
 6750                let end = word_range.end.to_offset(&display_map, Bias::Left);
 6751                (start, end)
 6752            } else {
 6753                (selection.start, selection.end)
 6754            };
 6755
 6756            let text = buffer.text_for_range(start..end).collect::<String>();
 6757            let old_length = text.len() as i32;
 6758            let text = callback(&text);
 6759
 6760            new_selections.push(Selection {
 6761                start: (start as i32 - selection_adjustment) as usize,
 6762                end: ((start + text.len()) as i32 - selection_adjustment) as usize,
 6763                goal: SelectionGoal::None,
 6764                ..selection
 6765            });
 6766
 6767            selection_adjustment += old_length - text.len() as i32;
 6768
 6769            edits.push((start..end, text));
 6770        }
 6771
 6772        self.transact(cx, |this, cx| {
 6773            this.buffer.update(cx, |buffer, cx| {
 6774                buffer.edit(edits, None, cx);
 6775            });
 6776
 6777            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6778                s.select(new_selections);
 6779            });
 6780
 6781            this.request_autoscroll(Autoscroll::fit(), cx);
 6782        });
 6783    }
 6784
 6785    pub fn duplicate_line(&mut self, upwards: bool, cx: &mut ViewContext<Self>) {
 6786        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6787        let buffer = &display_map.buffer_snapshot;
 6788        let selections = self.selections.all::<Point>(cx);
 6789
 6790        let mut edits = Vec::new();
 6791        let mut selections_iter = selections.iter().peekable();
 6792        while let Some(selection) = selections_iter.next() {
 6793            // Avoid duplicating the same lines twice.
 6794            let mut rows = selection.spanned_rows(false, &display_map);
 6795
 6796            while let Some(next_selection) = selections_iter.peek() {
 6797                let next_rows = next_selection.spanned_rows(false, &display_map);
 6798                if next_rows.start < rows.end {
 6799                    rows.end = next_rows.end;
 6800                    selections_iter.next().unwrap();
 6801                } else {
 6802                    break;
 6803                }
 6804            }
 6805
 6806            // Copy the text from the selected row region and splice it either at the start
 6807            // or end of the region.
 6808            let start = Point::new(rows.start.0, 0);
 6809            let end = Point::new(
 6810                rows.end.previous_row().0,
 6811                buffer.line_len(rows.end.previous_row()),
 6812            );
 6813            let text = buffer
 6814                .text_for_range(start..end)
 6815                .chain(Some("\n"))
 6816                .collect::<String>();
 6817            let insert_location = if upwards {
 6818                Point::new(rows.end.0, 0)
 6819            } else {
 6820                start
 6821            };
 6822            edits.push((insert_location..insert_location, text));
 6823        }
 6824
 6825        self.transact(cx, |this, cx| {
 6826            this.buffer.update(cx, |buffer, cx| {
 6827                buffer.edit(edits, None, cx);
 6828            });
 6829
 6830            this.request_autoscroll(Autoscroll::fit(), cx);
 6831        });
 6832    }
 6833
 6834    pub fn duplicate_line_up(&mut self, _: &DuplicateLineUp, cx: &mut ViewContext<Self>) {
 6835        self.duplicate_line(true, cx);
 6836    }
 6837
 6838    pub fn duplicate_line_down(&mut self, _: &DuplicateLineDown, cx: &mut ViewContext<Self>) {
 6839        self.duplicate_line(false, cx);
 6840    }
 6841
 6842    pub fn move_line_up(&mut self, _: &MoveLineUp, cx: &mut ViewContext<Self>) {
 6843        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6844        let buffer = self.buffer.read(cx).snapshot(cx);
 6845
 6846        let mut edits = Vec::new();
 6847        let mut unfold_ranges = Vec::new();
 6848        let mut refold_creases = Vec::new();
 6849
 6850        let selections = self.selections.all::<Point>(cx);
 6851        let mut selections = selections.iter().peekable();
 6852        let mut contiguous_row_selections = Vec::new();
 6853        let mut new_selections = Vec::new();
 6854
 6855        while let Some(selection) = selections.next() {
 6856            // Find all the selections that span a contiguous row range
 6857            let (start_row, end_row) = consume_contiguous_rows(
 6858                &mut contiguous_row_selections,
 6859                selection,
 6860                &display_map,
 6861                &mut selections,
 6862            );
 6863
 6864            // Move the text spanned by the row range to be before the line preceding the row range
 6865            if start_row.0 > 0 {
 6866                let range_to_move = Point::new(
 6867                    start_row.previous_row().0,
 6868                    buffer.line_len(start_row.previous_row()),
 6869                )
 6870                    ..Point::new(
 6871                        end_row.previous_row().0,
 6872                        buffer.line_len(end_row.previous_row()),
 6873                    );
 6874                let insertion_point = display_map
 6875                    .prev_line_boundary(Point::new(start_row.previous_row().0, 0))
 6876                    .0;
 6877
 6878                // Don't move lines across excerpts
 6879                if buffer
 6880                    .excerpt_boundaries_in_range((
 6881                        Bound::Excluded(insertion_point),
 6882                        Bound::Included(range_to_move.end),
 6883                    ))
 6884                    .next()
 6885                    .is_none()
 6886                {
 6887                    let text = buffer
 6888                        .text_for_range(range_to_move.clone())
 6889                        .flat_map(|s| s.chars())
 6890                        .skip(1)
 6891                        .chain(['\n'])
 6892                        .collect::<String>();
 6893
 6894                    edits.push((
 6895                        buffer.anchor_after(range_to_move.start)
 6896                            ..buffer.anchor_before(range_to_move.end),
 6897                        String::new(),
 6898                    ));
 6899                    let insertion_anchor = buffer.anchor_after(insertion_point);
 6900                    edits.push((insertion_anchor..insertion_anchor, text));
 6901
 6902                    let row_delta = range_to_move.start.row - insertion_point.row + 1;
 6903
 6904                    // Move selections up
 6905                    new_selections.extend(contiguous_row_selections.drain(..).map(
 6906                        |mut selection| {
 6907                            selection.start.row -= row_delta;
 6908                            selection.end.row -= row_delta;
 6909                            selection
 6910                        },
 6911                    ));
 6912
 6913                    // Move folds up
 6914                    unfold_ranges.push(range_to_move.clone());
 6915                    for fold in display_map.folds_in_range(
 6916                        buffer.anchor_before(range_to_move.start)
 6917                            ..buffer.anchor_after(range_to_move.end),
 6918                    ) {
 6919                        let mut start = fold.range.start.to_point(&buffer);
 6920                        let mut end = fold.range.end.to_point(&buffer);
 6921                        start.row -= row_delta;
 6922                        end.row -= row_delta;
 6923                        refold_creases.push(Crease::simple(start..end, fold.placeholder.clone()));
 6924                    }
 6925                }
 6926            }
 6927
 6928            // If we didn't move line(s), preserve the existing selections
 6929            new_selections.append(&mut contiguous_row_selections);
 6930        }
 6931
 6932        self.transact(cx, |this, cx| {
 6933            this.unfold_ranges(&unfold_ranges, true, true, cx);
 6934            this.buffer.update(cx, |buffer, cx| {
 6935                for (range, text) in edits {
 6936                    buffer.edit([(range, text)], None, cx);
 6937                }
 6938            });
 6939            this.fold_creases(refold_creases, true, cx);
 6940            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6941                s.select(new_selections);
 6942            })
 6943        });
 6944    }
 6945
 6946    pub fn move_line_down(&mut self, _: &MoveLineDown, cx: &mut ViewContext<Self>) {
 6947        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6948        let buffer = self.buffer.read(cx).snapshot(cx);
 6949
 6950        let mut edits = Vec::new();
 6951        let mut unfold_ranges = Vec::new();
 6952        let mut refold_creases = Vec::new();
 6953
 6954        let selections = self.selections.all::<Point>(cx);
 6955        let mut selections = selections.iter().peekable();
 6956        let mut contiguous_row_selections = Vec::new();
 6957        let mut new_selections = Vec::new();
 6958
 6959        while let Some(selection) = selections.next() {
 6960            // Find all the selections that span a contiguous row range
 6961            let (start_row, end_row) = consume_contiguous_rows(
 6962                &mut contiguous_row_selections,
 6963                selection,
 6964                &display_map,
 6965                &mut selections,
 6966            );
 6967
 6968            // Move the text spanned by the row range to be after the last line of the row range
 6969            if end_row.0 <= buffer.max_point().row {
 6970                let range_to_move =
 6971                    MultiBufferPoint::new(start_row.0, 0)..MultiBufferPoint::new(end_row.0, 0);
 6972                let insertion_point = display_map
 6973                    .next_line_boundary(MultiBufferPoint::new(end_row.0, 0))
 6974                    .0;
 6975
 6976                // Don't move lines across excerpt boundaries
 6977                if buffer
 6978                    .excerpt_boundaries_in_range((
 6979                        Bound::Excluded(range_to_move.start),
 6980                        Bound::Included(insertion_point),
 6981                    ))
 6982                    .next()
 6983                    .is_none()
 6984                {
 6985                    let mut text = String::from("\n");
 6986                    text.extend(buffer.text_for_range(range_to_move.clone()));
 6987                    text.pop(); // Drop trailing newline
 6988                    edits.push((
 6989                        buffer.anchor_after(range_to_move.start)
 6990                            ..buffer.anchor_before(range_to_move.end),
 6991                        String::new(),
 6992                    ));
 6993                    let insertion_anchor = buffer.anchor_after(insertion_point);
 6994                    edits.push((insertion_anchor..insertion_anchor, text));
 6995
 6996                    let row_delta = insertion_point.row - range_to_move.end.row + 1;
 6997
 6998                    // Move selections down
 6999                    new_selections.extend(contiguous_row_selections.drain(..).map(
 7000                        |mut selection| {
 7001                            selection.start.row += row_delta;
 7002                            selection.end.row += row_delta;
 7003                            selection
 7004                        },
 7005                    ));
 7006
 7007                    // Move folds down
 7008                    unfold_ranges.push(range_to_move.clone());
 7009                    for fold in display_map.folds_in_range(
 7010                        buffer.anchor_before(range_to_move.start)
 7011                            ..buffer.anchor_after(range_to_move.end),
 7012                    ) {
 7013                        let mut start = fold.range.start.to_point(&buffer);
 7014                        let mut end = fold.range.end.to_point(&buffer);
 7015                        start.row += row_delta;
 7016                        end.row += row_delta;
 7017                        refold_creases.push(Crease::simple(start..end, fold.placeholder.clone()));
 7018                    }
 7019                }
 7020            }
 7021
 7022            // If we didn't move line(s), preserve the existing selections
 7023            new_selections.append(&mut contiguous_row_selections);
 7024        }
 7025
 7026        self.transact(cx, |this, cx| {
 7027            this.unfold_ranges(&unfold_ranges, true, true, cx);
 7028            this.buffer.update(cx, |buffer, cx| {
 7029                for (range, text) in edits {
 7030                    buffer.edit([(range, text)], None, cx);
 7031                }
 7032            });
 7033            this.fold_creases(refold_creases, true, cx);
 7034            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(new_selections));
 7035        });
 7036    }
 7037
 7038    pub fn transpose(&mut self, _: &Transpose, cx: &mut ViewContext<Self>) {
 7039        let text_layout_details = &self.text_layout_details(cx);
 7040        self.transact(cx, |this, cx| {
 7041            let edits = this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7042                let mut edits: Vec<(Range<usize>, String)> = Default::default();
 7043                let line_mode = s.line_mode;
 7044                s.move_with(|display_map, selection| {
 7045                    if !selection.is_empty() || line_mode {
 7046                        return;
 7047                    }
 7048
 7049                    let mut head = selection.head();
 7050                    let mut transpose_offset = head.to_offset(display_map, Bias::Right);
 7051                    if head.column() == display_map.line_len(head.row()) {
 7052                        transpose_offset = display_map
 7053                            .buffer_snapshot
 7054                            .clip_offset(transpose_offset.saturating_sub(1), Bias::Left);
 7055                    }
 7056
 7057                    if transpose_offset == 0 {
 7058                        return;
 7059                    }
 7060
 7061                    *head.column_mut() += 1;
 7062                    head = display_map.clip_point(head, Bias::Right);
 7063                    let goal = SelectionGoal::HorizontalPosition(
 7064                        display_map
 7065                            .x_for_display_point(head, text_layout_details)
 7066                            .into(),
 7067                    );
 7068                    selection.collapse_to(head, goal);
 7069
 7070                    let transpose_start = display_map
 7071                        .buffer_snapshot
 7072                        .clip_offset(transpose_offset.saturating_sub(1), Bias::Left);
 7073                    if edits.last().map_or(true, |e| e.0.end <= transpose_start) {
 7074                        let transpose_end = display_map
 7075                            .buffer_snapshot
 7076                            .clip_offset(transpose_offset + 1, Bias::Right);
 7077                        if let Some(ch) =
 7078                            display_map.buffer_snapshot.chars_at(transpose_start).next()
 7079                        {
 7080                            edits.push((transpose_start..transpose_offset, String::new()));
 7081                            edits.push((transpose_end..transpose_end, ch.to_string()));
 7082                        }
 7083                    }
 7084                });
 7085                edits
 7086            });
 7087            this.buffer
 7088                .update(cx, |buffer, cx| buffer.edit(edits, None, cx));
 7089            let selections = this.selections.all::<usize>(cx);
 7090            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7091                s.select(selections);
 7092            });
 7093        });
 7094    }
 7095
 7096    pub fn rewrap(&mut self, _: &Rewrap, cx: &mut ViewContext<Self>) {
 7097        self.rewrap_impl(IsVimMode::No, cx)
 7098    }
 7099
 7100    pub fn rewrap_impl(&mut self, is_vim_mode: IsVimMode, cx: &mut ViewContext<Self>) {
 7101        let buffer = self.buffer.read(cx).snapshot(cx);
 7102        let selections = self.selections.all::<Point>(cx);
 7103        let mut selections = selections.iter().peekable();
 7104
 7105        let mut edits = Vec::new();
 7106        let mut rewrapped_row_ranges = Vec::<RangeInclusive<u32>>::new();
 7107
 7108        while let Some(selection) = selections.next() {
 7109            let mut start_row = selection.start.row;
 7110            let mut end_row = selection.end.row;
 7111
 7112            // Skip selections that overlap with a range that has already been rewrapped.
 7113            let selection_range = start_row..end_row;
 7114            if rewrapped_row_ranges
 7115                .iter()
 7116                .any(|range| range.overlaps(&selection_range))
 7117            {
 7118                continue;
 7119            }
 7120
 7121            let mut should_rewrap = is_vim_mode == IsVimMode::Yes;
 7122
 7123            if let Some(language_scope) = buffer.language_scope_at(selection.head()) {
 7124                match language_scope.language_name().0.as_ref() {
 7125                    "Markdown" | "Plain Text" => {
 7126                        should_rewrap = true;
 7127                    }
 7128                    _ => {}
 7129                }
 7130            }
 7131
 7132            let tab_size = buffer.settings_at(selection.head(), cx).tab_size;
 7133
 7134            // Since not all lines in the selection may be at the same indent
 7135            // level, choose the indent size that is the most common between all
 7136            // of the lines.
 7137            //
 7138            // If there is a tie, we use the deepest indent.
 7139            let (indent_size, indent_end) = {
 7140                let mut indent_size_occurrences = HashMap::default();
 7141                let mut rows_by_indent_size = HashMap::<IndentSize, Vec<u32>>::default();
 7142
 7143                for row in start_row..=end_row {
 7144                    let indent = buffer.indent_size_for_line(MultiBufferRow(row));
 7145                    rows_by_indent_size.entry(indent).or_default().push(row);
 7146                    *indent_size_occurrences.entry(indent).or_insert(0) += 1;
 7147                }
 7148
 7149                let indent_size = indent_size_occurrences
 7150                    .into_iter()
 7151                    .max_by_key(|(indent, count)| (*count, indent.len_with_expanded_tabs(tab_size)))
 7152                    .map(|(indent, _)| indent)
 7153                    .unwrap_or_default();
 7154                let row = rows_by_indent_size[&indent_size][0];
 7155                let indent_end = Point::new(row, indent_size.len);
 7156
 7157                (indent_size, indent_end)
 7158            };
 7159
 7160            let mut line_prefix = indent_size.chars().collect::<String>();
 7161
 7162            if let Some(comment_prefix) =
 7163                buffer
 7164                    .language_scope_at(selection.head())
 7165                    .and_then(|language| {
 7166                        language
 7167                            .line_comment_prefixes()
 7168                            .iter()
 7169                            .find(|prefix| buffer.contains_str_at(indent_end, prefix))
 7170                            .cloned()
 7171                    })
 7172            {
 7173                line_prefix.push_str(&comment_prefix);
 7174                should_rewrap = true;
 7175            }
 7176
 7177            if !should_rewrap {
 7178                continue;
 7179            }
 7180
 7181            if selection.is_empty() {
 7182                'expand_upwards: while start_row > 0 {
 7183                    let prev_row = start_row - 1;
 7184                    if buffer.contains_str_at(Point::new(prev_row, 0), &line_prefix)
 7185                        && buffer.line_len(MultiBufferRow(prev_row)) as usize > line_prefix.len()
 7186                    {
 7187                        start_row = prev_row;
 7188                    } else {
 7189                        break 'expand_upwards;
 7190                    }
 7191                }
 7192
 7193                'expand_downwards: while end_row < buffer.max_point().row {
 7194                    let next_row = end_row + 1;
 7195                    if buffer.contains_str_at(Point::new(next_row, 0), &line_prefix)
 7196                        && buffer.line_len(MultiBufferRow(next_row)) as usize > line_prefix.len()
 7197                    {
 7198                        end_row = next_row;
 7199                    } else {
 7200                        break 'expand_downwards;
 7201                    }
 7202                }
 7203            }
 7204
 7205            let start = Point::new(start_row, 0);
 7206            let end = Point::new(end_row, buffer.line_len(MultiBufferRow(end_row)));
 7207            let selection_text = buffer.text_for_range(start..end).collect::<String>();
 7208            let Some(lines_without_prefixes) = selection_text
 7209                .lines()
 7210                .map(|line| {
 7211                    line.strip_prefix(&line_prefix)
 7212                        .or_else(|| line.trim_start().strip_prefix(&line_prefix.trim_start()))
 7213                        .ok_or_else(|| {
 7214                            anyhow!("line did not start with prefix {line_prefix:?}: {line:?}")
 7215                        })
 7216                })
 7217                .collect::<Result<Vec<_>, _>>()
 7218                .log_err()
 7219            else {
 7220                continue;
 7221            };
 7222
 7223            let wrap_column = buffer
 7224                .settings_at(Point::new(start_row, 0), cx)
 7225                .preferred_line_length as usize;
 7226            let wrapped_text = wrap_with_prefix(
 7227                line_prefix,
 7228                lines_without_prefixes.join(" "),
 7229                wrap_column,
 7230                tab_size,
 7231            );
 7232
 7233            // TODO: should always use char-based diff while still supporting cursor behavior that
 7234            // matches vim.
 7235            let diff = match is_vim_mode {
 7236                IsVimMode::Yes => TextDiff::from_lines(&selection_text, &wrapped_text),
 7237                IsVimMode::No => TextDiff::from_chars(&selection_text, &wrapped_text),
 7238            };
 7239            let mut offset = start.to_offset(&buffer);
 7240            let mut moved_since_edit = true;
 7241
 7242            for change in diff.iter_all_changes() {
 7243                let value = change.value();
 7244                match change.tag() {
 7245                    ChangeTag::Equal => {
 7246                        offset += value.len();
 7247                        moved_since_edit = true;
 7248                    }
 7249                    ChangeTag::Delete => {
 7250                        let start = buffer.anchor_after(offset);
 7251                        let end = buffer.anchor_before(offset + value.len());
 7252
 7253                        if moved_since_edit {
 7254                            edits.push((start..end, String::new()));
 7255                        } else {
 7256                            edits.last_mut().unwrap().0.end = end;
 7257                        }
 7258
 7259                        offset += value.len();
 7260                        moved_since_edit = false;
 7261                    }
 7262                    ChangeTag::Insert => {
 7263                        if moved_since_edit {
 7264                            let anchor = buffer.anchor_after(offset);
 7265                            edits.push((anchor..anchor, value.to_string()));
 7266                        } else {
 7267                            edits.last_mut().unwrap().1.push_str(value);
 7268                        }
 7269
 7270                        moved_since_edit = false;
 7271                    }
 7272                }
 7273            }
 7274
 7275            rewrapped_row_ranges.push(start_row..=end_row);
 7276        }
 7277
 7278        self.buffer
 7279            .update(cx, |buffer, cx| buffer.edit(edits, None, cx));
 7280    }
 7281
 7282    pub fn cut_common(&mut self, cx: &mut ViewContext<Self>) -> ClipboardItem {
 7283        let mut text = String::new();
 7284        let buffer = self.buffer.read(cx).snapshot(cx);
 7285        let mut selections = self.selections.all::<Point>(cx);
 7286        let mut clipboard_selections = Vec::with_capacity(selections.len());
 7287        {
 7288            let max_point = buffer.max_point();
 7289            let mut is_first = true;
 7290            for selection in &mut selections {
 7291                let is_entire_line = selection.is_empty() || self.selections.line_mode;
 7292                if is_entire_line {
 7293                    selection.start = Point::new(selection.start.row, 0);
 7294                    if !selection.is_empty() && selection.end.column == 0 {
 7295                        selection.end = cmp::min(max_point, selection.end);
 7296                    } else {
 7297                        selection.end = cmp::min(max_point, Point::new(selection.end.row + 1, 0));
 7298                    }
 7299                    selection.goal = SelectionGoal::None;
 7300                }
 7301                if is_first {
 7302                    is_first = false;
 7303                } else {
 7304                    text += "\n";
 7305                }
 7306                let mut len = 0;
 7307                for chunk in buffer.text_for_range(selection.start..selection.end) {
 7308                    text.push_str(chunk);
 7309                    len += chunk.len();
 7310                }
 7311                clipboard_selections.push(ClipboardSelection {
 7312                    len,
 7313                    is_entire_line,
 7314                    first_line_indent: buffer
 7315                        .indent_size_for_line(MultiBufferRow(selection.start.row))
 7316                        .len,
 7317                });
 7318            }
 7319        }
 7320
 7321        self.transact(cx, |this, cx| {
 7322            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7323                s.select(selections);
 7324            });
 7325            this.insert("", cx);
 7326        });
 7327        ClipboardItem::new_string_with_json_metadata(text, clipboard_selections)
 7328    }
 7329
 7330    pub fn cut(&mut self, _: &Cut, cx: &mut ViewContext<Self>) {
 7331        let item = self.cut_common(cx);
 7332        cx.write_to_clipboard(item);
 7333    }
 7334
 7335    pub fn kill_ring_cut(&mut self, _: &KillRingCut, cx: &mut ViewContext<Self>) {
 7336        self.change_selections(None, cx, |s| {
 7337            s.move_with(|snapshot, sel| {
 7338                if sel.is_empty() {
 7339                    sel.end = DisplayPoint::new(sel.end.row(), snapshot.line_len(sel.end.row()))
 7340                }
 7341            });
 7342        });
 7343        let item = self.cut_common(cx);
 7344        cx.set_global(KillRing(item))
 7345    }
 7346
 7347    pub fn kill_ring_yank(&mut self, _: &KillRingYank, cx: &mut ViewContext<Self>) {
 7348        let (text, metadata) = if let Some(KillRing(item)) = cx.try_global() {
 7349            if let Some(ClipboardEntry::String(kill_ring)) = item.entries().first() {
 7350                (kill_ring.text().to_string(), kill_ring.metadata_json())
 7351            } else {
 7352                return;
 7353            }
 7354        } else {
 7355            return;
 7356        };
 7357        self.do_paste(&text, metadata, false, cx);
 7358    }
 7359
 7360    pub fn copy(&mut self, _: &Copy, cx: &mut ViewContext<Self>) {
 7361        let selections = self.selections.all::<Point>(cx);
 7362        let buffer = self.buffer.read(cx).read(cx);
 7363        let mut text = String::new();
 7364
 7365        let mut clipboard_selections = Vec::with_capacity(selections.len());
 7366        {
 7367            let max_point = buffer.max_point();
 7368            let mut is_first = true;
 7369            for selection in selections.iter() {
 7370                let mut start = selection.start;
 7371                let mut end = selection.end;
 7372                let is_entire_line = selection.is_empty() || self.selections.line_mode;
 7373                if is_entire_line {
 7374                    start = Point::new(start.row, 0);
 7375                    end = cmp::min(max_point, Point::new(end.row + 1, 0));
 7376                }
 7377                if is_first {
 7378                    is_first = false;
 7379                } else {
 7380                    text += "\n";
 7381                }
 7382                let mut len = 0;
 7383                for chunk in buffer.text_for_range(start..end) {
 7384                    text.push_str(chunk);
 7385                    len += chunk.len();
 7386                }
 7387                clipboard_selections.push(ClipboardSelection {
 7388                    len,
 7389                    is_entire_line,
 7390                    first_line_indent: buffer.indent_size_for_line(MultiBufferRow(start.row)).len,
 7391                });
 7392            }
 7393        }
 7394
 7395        cx.write_to_clipboard(ClipboardItem::new_string_with_json_metadata(
 7396            text,
 7397            clipboard_selections,
 7398        ));
 7399    }
 7400
 7401    pub fn do_paste(
 7402        &mut self,
 7403        text: &String,
 7404        clipboard_selections: Option<Vec<ClipboardSelection>>,
 7405        handle_entire_lines: bool,
 7406        cx: &mut ViewContext<Self>,
 7407    ) {
 7408        if self.read_only(cx) {
 7409            return;
 7410        }
 7411
 7412        let clipboard_text = Cow::Borrowed(text);
 7413
 7414        self.transact(cx, |this, cx| {
 7415            if let Some(mut clipboard_selections) = clipboard_selections {
 7416                let old_selections = this.selections.all::<usize>(cx);
 7417                let all_selections_were_entire_line =
 7418                    clipboard_selections.iter().all(|s| s.is_entire_line);
 7419                let first_selection_indent_column =
 7420                    clipboard_selections.first().map(|s| s.first_line_indent);
 7421                if clipboard_selections.len() != old_selections.len() {
 7422                    clipboard_selections.drain(..);
 7423                }
 7424                let cursor_offset = this.selections.last::<usize>(cx).head();
 7425                let mut auto_indent_on_paste = true;
 7426
 7427                this.buffer.update(cx, |buffer, cx| {
 7428                    let snapshot = buffer.read(cx);
 7429                    auto_indent_on_paste =
 7430                        snapshot.settings_at(cursor_offset, cx).auto_indent_on_paste;
 7431
 7432                    let mut start_offset = 0;
 7433                    let mut edits = Vec::new();
 7434                    let mut original_indent_columns = Vec::new();
 7435                    for (ix, selection) in old_selections.iter().enumerate() {
 7436                        let to_insert;
 7437                        let entire_line;
 7438                        let original_indent_column;
 7439                        if let Some(clipboard_selection) = clipboard_selections.get(ix) {
 7440                            let end_offset = start_offset + clipboard_selection.len;
 7441                            to_insert = &clipboard_text[start_offset..end_offset];
 7442                            entire_line = clipboard_selection.is_entire_line;
 7443                            start_offset = end_offset + 1;
 7444                            original_indent_column = Some(clipboard_selection.first_line_indent);
 7445                        } else {
 7446                            to_insert = clipboard_text.as_str();
 7447                            entire_line = all_selections_were_entire_line;
 7448                            original_indent_column = first_selection_indent_column
 7449                        }
 7450
 7451                        // If the corresponding selection was empty when this slice of the
 7452                        // clipboard text was written, then the entire line containing the
 7453                        // selection was copied. If this selection is also currently empty,
 7454                        // then paste the line before the current line of the buffer.
 7455                        let range = if selection.is_empty() && handle_entire_lines && entire_line {
 7456                            let column = selection.start.to_point(&snapshot).column as usize;
 7457                            let line_start = selection.start - column;
 7458                            line_start..line_start
 7459                        } else {
 7460                            selection.range()
 7461                        };
 7462
 7463                        edits.push((range, to_insert));
 7464                        original_indent_columns.extend(original_indent_column);
 7465                    }
 7466                    drop(snapshot);
 7467
 7468                    buffer.edit(
 7469                        edits,
 7470                        if auto_indent_on_paste {
 7471                            Some(AutoindentMode::Block {
 7472                                original_indent_columns,
 7473                            })
 7474                        } else {
 7475                            None
 7476                        },
 7477                        cx,
 7478                    );
 7479                });
 7480
 7481                let selections = this.selections.all::<usize>(cx);
 7482                this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 7483            } else {
 7484                this.insert(&clipboard_text, cx);
 7485            }
 7486        });
 7487    }
 7488
 7489    pub fn paste(&mut self, _: &Paste, cx: &mut ViewContext<Self>) {
 7490        if let Some(item) = cx.read_from_clipboard() {
 7491            let entries = item.entries();
 7492
 7493            match entries.first() {
 7494                // For now, we only support applying metadata if there's one string. In the future, we can incorporate all the selections
 7495                // of all the pasted entries.
 7496                Some(ClipboardEntry::String(clipboard_string)) if entries.len() == 1 => self
 7497                    .do_paste(
 7498                        clipboard_string.text(),
 7499                        clipboard_string.metadata_json::<Vec<ClipboardSelection>>(),
 7500                        true,
 7501                        cx,
 7502                    ),
 7503                _ => self.do_paste(&item.text().unwrap_or_default(), None, true, cx),
 7504            }
 7505        }
 7506    }
 7507
 7508    pub fn undo(&mut self, _: &Undo, cx: &mut ViewContext<Self>) {
 7509        if self.read_only(cx) {
 7510            return;
 7511        }
 7512
 7513        if let Some(transaction_id) = self.buffer.update(cx, |buffer, cx| buffer.undo(cx)) {
 7514            if let Some((selections, _)) =
 7515                self.selection_history.transaction(transaction_id).cloned()
 7516            {
 7517                self.change_selections(None, cx, |s| {
 7518                    s.select_anchors(selections.to_vec());
 7519                });
 7520            }
 7521            self.request_autoscroll(Autoscroll::fit(), cx);
 7522            self.unmark_text(cx);
 7523            self.refresh_inline_completion(true, false, cx);
 7524            cx.emit(EditorEvent::Edited { transaction_id });
 7525            cx.emit(EditorEvent::TransactionUndone { transaction_id });
 7526        }
 7527    }
 7528
 7529    pub fn redo(&mut self, _: &Redo, cx: &mut ViewContext<Self>) {
 7530        if self.read_only(cx) {
 7531            return;
 7532        }
 7533
 7534        if let Some(transaction_id) = self.buffer.update(cx, |buffer, cx| buffer.redo(cx)) {
 7535            if let Some((_, Some(selections))) =
 7536                self.selection_history.transaction(transaction_id).cloned()
 7537            {
 7538                self.change_selections(None, cx, |s| {
 7539                    s.select_anchors(selections.to_vec());
 7540                });
 7541            }
 7542            self.request_autoscroll(Autoscroll::fit(), cx);
 7543            self.unmark_text(cx);
 7544            self.refresh_inline_completion(true, false, cx);
 7545            cx.emit(EditorEvent::Edited { transaction_id });
 7546        }
 7547    }
 7548
 7549    pub fn finalize_last_transaction(&mut self, cx: &mut ViewContext<Self>) {
 7550        self.buffer
 7551            .update(cx, |buffer, cx| buffer.finalize_last_transaction(cx));
 7552    }
 7553
 7554    pub fn group_until_transaction(&mut self, tx_id: TransactionId, cx: &mut ViewContext<Self>) {
 7555        self.buffer
 7556            .update(cx, |buffer, cx| buffer.group_until_transaction(tx_id, cx));
 7557    }
 7558
 7559    pub fn move_left(&mut self, _: &MoveLeft, cx: &mut ViewContext<Self>) {
 7560        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7561            let line_mode = s.line_mode;
 7562            s.move_with(|map, selection| {
 7563                let cursor = if selection.is_empty() && !line_mode {
 7564                    movement::left(map, selection.start)
 7565                } else {
 7566                    selection.start
 7567                };
 7568                selection.collapse_to(cursor, SelectionGoal::None);
 7569            });
 7570        })
 7571    }
 7572
 7573    pub fn select_left(&mut self, _: &SelectLeft, cx: &mut ViewContext<Self>) {
 7574        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7575            s.move_heads_with(|map, head, _| (movement::left(map, head), SelectionGoal::None));
 7576        })
 7577    }
 7578
 7579    pub fn move_right(&mut self, _: &MoveRight, cx: &mut ViewContext<Self>) {
 7580        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7581            let line_mode = s.line_mode;
 7582            s.move_with(|map, selection| {
 7583                let cursor = if selection.is_empty() && !line_mode {
 7584                    movement::right(map, selection.end)
 7585                } else {
 7586                    selection.end
 7587                };
 7588                selection.collapse_to(cursor, SelectionGoal::None)
 7589            });
 7590        })
 7591    }
 7592
 7593    pub fn select_right(&mut self, _: &SelectRight, cx: &mut ViewContext<Self>) {
 7594        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7595            s.move_heads_with(|map, head, _| (movement::right(map, head), SelectionGoal::None));
 7596        })
 7597    }
 7598
 7599    pub fn move_up(&mut self, _: &MoveUp, cx: &mut ViewContext<Self>) {
 7600        if self.take_rename(true, cx).is_some() {
 7601            return;
 7602        }
 7603
 7604        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7605            cx.propagate();
 7606            return;
 7607        }
 7608
 7609        let text_layout_details = &self.text_layout_details(cx);
 7610        let selection_count = self.selections.count();
 7611        let first_selection = self.selections.first_anchor();
 7612
 7613        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7614            let line_mode = s.line_mode;
 7615            s.move_with(|map, selection| {
 7616                if !selection.is_empty() && !line_mode {
 7617                    selection.goal = SelectionGoal::None;
 7618                }
 7619                let (cursor, goal) = movement::up(
 7620                    map,
 7621                    selection.start,
 7622                    selection.goal,
 7623                    false,
 7624                    text_layout_details,
 7625                );
 7626                selection.collapse_to(cursor, goal);
 7627            });
 7628        });
 7629
 7630        if selection_count == 1 && first_selection.range() == self.selections.first_anchor().range()
 7631        {
 7632            cx.propagate();
 7633        }
 7634    }
 7635
 7636    pub fn move_up_by_lines(&mut self, action: &MoveUpByLines, cx: &mut ViewContext<Self>) {
 7637        if self.take_rename(true, cx).is_some() {
 7638            return;
 7639        }
 7640
 7641        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7642            cx.propagate();
 7643            return;
 7644        }
 7645
 7646        let text_layout_details = &self.text_layout_details(cx);
 7647
 7648        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7649            let line_mode = s.line_mode;
 7650            s.move_with(|map, selection| {
 7651                if !selection.is_empty() && !line_mode {
 7652                    selection.goal = SelectionGoal::None;
 7653                }
 7654                let (cursor, goal) = movement::up_by_rows(
 7655                    map,
 7656                    selection.start,
 7657                    action.lines,
 7658                    selection.goal,
 7659                    false,
 7660                    text_layout_details,
 7661                );
 7662                selection.collapse_to(cursor, goal);
 7663            });
 7664        })
 7665    }
 7666
 7667    pub fn move_down_by_lines(&mut self, action: &MoveDownByLines, cx: &mut ViewContext<Self>) {
 7668        if self.take_rename(true, cx).is_some() {
 7669            return;
 7670        }
 7671
 7672        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7673            cx.propagate();
 7674            return;
 7675        }
 7676
 7677        let text_layout_details = &self.text_layout_details(cx);
 7678
 7679        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7680            let line_mode = s.line_mode;
 7681            s.move_with(|map, selection| {
 7682                if !selection.is_empty() && !line_mode {
 7683                    selection.goal = SelectionGoal::None;
 7684                }
 7685                let (cursor, goal) = movement::down_by_rows(
 7686                    map,
 7687                    selection.start,
 7688                    action.lines,
 7689                    selection.goal,
 7690                    false,
 7691                    text_layout_details,
 7692                );
 7693                selection.collapse_to(cursor, goal);
 7694            });
 7695        })
 7696    }
 7697
 7698    pub fn select_down_by_lines(&mut self, action: &SelectDownByLines, cx: &mut ViewContext<Self>) {
 7699        let text_layout_details = &self.text_layout_details(cx);
 7700        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7701            s.move_heads_with(|map, head, goal| {
 7702                movement::down_by_rows(map, head, action.lines, goal, false, text_layout_details)
 7703            })
 7704        })
 7705    }
 7706
 7707    pub fn select_up_by_lines(&mut self, action: &SelectUpByLines, cx: &mut ViewContext<Self>) {
 7708        let text_layout_details = &self.text_layout_details(cx);
 7709        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7710            s.move_heads_with(|map, head, goal| {
 7711                movement::up_by_rows(map, head, action.lines, goal, false, text_layout_details)
 7712            })
 7713        })
 7714    }
 7715
 7716    pub fn select_page_up(&mut self, _: &SelectPageUp, cx: &mut ViewContext<Self>) {
 7717        let Some(row_count) = self.visible_row_count() else {
 7718            return;
 7719        };
 7720
 7721        let text_layout_details = &self.text_layout_details(cx);
 7722
 7723        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7724            s.move_heads_with(|map, head, goal| {
 7725                movement::up_by_rows(map, head, row_count, goal, false, text_layout_details)
 7726            })
 7727        })
 7728    }
 7729
 7730    pub fn move_page_up(&mut self, action: &MovePageUp, cx: &mut ViewContext<Self>) {
 7731        if self.take_rename(true, cx).is_some() {
 7732            return;
 7733        }
 7734
 7735        if self
 7736            .context_menu
 7737            .write()
 7738            .as_mut()
 7739            .map(|menu| menu.select_first(self.completion_provider.as_deref(), cx))
 7740            .unwrap_or(false)
 7741        {
 7742            return;
 7743        }
 7744
 7745        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7746            cx.propagate();
 7747            return;
 7748        }
 7749
 7750        let Some(row_count) = self.visible_row_count() else {
 7751            return;
 7752        };
 7753
 7754        let autoscroll = if action.center_cursor {
 7755            Autoscroll::center()
 7756        } else {
 7757            Autoscroll::fit()
 7758        };
 7759
 7760        let text_layout_details = &self.text_layout_details(cx);
 7761
 7762        self.change_selections(Some(autoscroll), cx, |s| {
 7763            let line_mode = s.line_mode;
 7764            s.move_with(|map, selection| {
 7765                if !selection.is_empty() && !line_mode {
 7766                    selection.goal = SelectionGoal::None;
 7767                }
 7768                let (cursor, goal) = movement::up_by_rows(
 7769                    map,
 7770                    selection.end,
 7771                    row_count,
 7772                    selection.goal,
 7773                    false,
 7774                    text_layout_details,
 7775                );
 7776                selection.collapse_to(cursor, goal);
 7777            });
 7778        });
 7779    }
 7780
 7781    pub fn select_up(&mut self, _: &SelectUp, cx: &mut ViewContext<Self>) {
 7782        let text_layout_details = &self.text_layout_details(cx);
 7783        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7784            s.move_heads_with(|map, head, goal| {
 7785                movement::up(map, head, goal, false, text_layout_details)
 7786            })
 7787        })
 7788    }
 7789
 7790    pub fn move_down(&mut self, _: &MoveDown, cx: &mut ViewContext<Self>) {
 7791        self.take_rename(true, cx);
 7792
 7793        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7794            cx.propagate();
 7795            return;
 7796        }
 7797
 7798        let text_layout_details = &self.text_layout_details(cx);
 7799        let selection_count = self.selections.count();
 7800        let first_selection = self.selections.first_anchor();
 7801
 7802        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7803            let line_mode = s.line_mode;
 7804            s.move_with(|map, selection| {
 7805                if !selection.is_empty() && !line_mode {
 7806                    selection.goal = SelectionGoal::None;
 7807                }
 7808                let (cursor, goal) = movement::down(
 7809                    map,
 7810                    selection.end,
 7811                    selection.goal,
 7812                    false,
 7813                    text_layout_details,
 7814                );
 7815                selection.collapse_to(cursor, goal);
 7816            });
 7817        });
 7818
 7819        if selection_count == 1 && first_selection.range() == self.selections.first_anchor().range()
 7820        {
 7821            cx.propagate();
 7822        }
 7823    }
 7824
 7825    pub fn select_page_down(&mut self, _: &SelectPageDown, cx: &mut ViewContext<Self>) {
 7826        let Some(row_count) = self.visible_row_count() else {
 7827            return;
 7828        };
 7829
 7830        let text_layout_details = &self.text_layout_details(cx);
 7831
 7832        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7833            s.move_heads_with(|map, head, goal| {
 7834                movement::down_by_rows(map, head, row_count, goal, false, text_layout_details)
 7835            })
 7836        })
 7837    }
 7838
 7839    pub fn move_page_down(&mut self, action: &MovePageDown, cx: &mut ViewContext<Self>) {
 7840        if self.take_rename(true, cx).is_some() {
 7841            return;
 7842        }
 7843
 7844        if self
 7845            .context_menu
 7846            .write()
 7847            .as_mut()
 7848            .map(|menu| menu.select_last(self.completion_provider.as_deref(), cx))
 7849            .unwrap_or(false)
 7850        {
 7851            return;
 7852        }
 7853
 7854        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 7855            cx.propagate();
 7856            return;
 7857        }
 7858
 7859        let Some(row_count) = self.visible_row_count() else {
 7860            return;
 7861        };
 7862
 7863        let autoscroll = if action.center_cursor {
 7864            Autoscroll::center()
 7865        } else {
 7866            Autoscroll::fit()
 7867        };
 7868
 7869        let text_layout_details = &self.text_layout_details(cx);
 7870        self.change_selections(Some(autoscroll), cx, |s| {
 7871            let line_mode = s.line_mode;
 7872            s.move_with(|map, selection| {
 7873                if !selection.is_empty() && !line_mode {
 7874                    selection.goal = SelectionGoal::None;
 7875                }
 7876                let (cursor, goal) = movement::down_by_rows(
 7877                    map,
 7878                    selection.end,
 7879                    row_count,
 7880                    selection.goal,
 7881                    false,
 7882                    text_layout_details,
 7883                );
 7884                selection.collapse_to(cursor, goal);
 7885            });
 7886        });
 7887    }
 7888
 7889    pub fn select_down(&mut self, _: &SelectDown, cx: &mut ViewContext<Self>) {
 7890        let text_layout_details = &self.text_layout_details(cx);
 7891        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7892            s.move_heads_with(|map, head, goal| {
 7893                movement::down(map, head, goal, false, text_layout_details)
 7894            })
 7895        });
 7896    }
 7897
 7898    pub fn context_menu_first(&mut self, _: &ContextMenuFirst, cx: &mut ViewContext<Self>) {
 7899        if let Some(context_menu) = self.context_menu.write().as_mut() {
 7900            context_menu.select_first(self.completion_provider.as_deref(), cx);
 7901        }
 7902    }
 7903
 7904    pub fn context_menu_prev(&mut self, _: &ContextMenuPrev, cx: &mut ViewContext<Self>) {
 7905        if let Some(context_menu) = self.context_menu.write().as_mut() {
 7906            context_menu.select_prev(self.completion_provider.as_deref(), cx);
 7907        }
 7908    }
 7909
 7910    pub fn context_menu_next(&mut self, _: &ContextMenuNext, cx: &mut ViewContext<Self>) {
 7911        if let Some(context_menu) = self.context_menu.write().as_mut() {
 7912            context_menu.select_next(self.completion_provider.as_deref(), cx);
 7913        }
 7914    }
 7915
 7916    pub fn context_menu_last(&mut self, _: &ContextMenuLast, cx: &mut ViewContext<Self>) {
 7917        if let Some(context_menu) = self.context_menu.write().as_mut() {
 7918            context_menu.select_last(self.completion_provider.as_deref(), cx);
 7919        }
 7920    }
 7921
 7922    pub fn move_to_previous_word_start(
 7923        &mut self,
 7924        _: &MoveToPreviousWordStart,
 7925        cx: &mut ViewContext<Self>,
 7926    ) {
 7927        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7928            s.move_cursors_with(|map, head, _| {
 7929                (
 7930                    movement::previous_word_start(map, head),
 7931                    SelectionGoal::None,
 7932                )
 7933            });
 7934        })
 7935    }
 7936
 7937    pub fn move_to_previous_subword_start(
 7938        &mut self,
 7939        _: &MoveToPreviousSubwordStart,
 7940        cx: &mut ViewContext<Self>,
 7941    ) {
 7942        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7943            s.move_cursors_with(|map, head, _| {
 7944                (
 7945                    movement::previous_subword_start(map, head),
 7946                    SelectionGoal::None,
 7947                )
 7948            });
 7949        })
 7950    }
 7951
 7952    pub fn select_to_previous_word_start(
 7953        &mut self,
 7954        _: &SelectToPreviousWordStart,
 7955        cx: &mut ViewContext<Self>,
 7956    ) {
 7957        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7958            s.move_heads_with(|map, head, _| {
 7959                (
 7960                    movement::previous_word_start(map, head),
 7961                    SelectionGoal::None,
 7962                )
 7963            });
 7964        })
 7965    }
 7966
 7967    pub fn select_to_previous_subword_start(
 7968        &mut self,
 7969        _: &SelectToPreviousSubwordStart,
 7970        cx: &mut ViewContext<Self>,
 7971    ) {
 7972        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7973            s.move_heads_with(|map, head, _| {
 7974                (
 7975                    movement::previous_subword_start(map, head),
 7976                    SelectionGoal::None,
 7977                )
 7978            });
 7979        })
 7980    }
 7981
 7982    pub fn delete_to_previous_word_start(
 7983        &mut self,
 7984        action: &DeleteToPreviousWordStart,
 7985        cx: &mut ViewContext<Self>,
 7986    ) {
 7987        self.transact(cx, |this, cx| {
 7988            this.select_autoclose_pair(cx);
 7989            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7990                let line_mode = s.line_mode;
 7991                s.move_with(|map, selection| {
 7992                    if selection.is_empty() && !line_mode {
 7993                        let cursor = if action.ignore_newlines {
 7994                            movement::previous_word_start(map, selection.head())
 7995                        } else {
 7996                            movement::previous_word_start_or_newline(map, selection.head())
 7997                        };
 7998                        selection.set_head(cursor, SelectionGoal::None);
 7999                    }
 8000                });
 8001            });
 8002            this.insert("", cx);
 8003        });
 8004    }
 8005
 8006    pub fn delete_to_previous_subword_start(
 8007        &mut self,
 8008        _: &DeleteToPreviousSubwordStart,
 8009        cx: &mut ViewContext<Self>,
 8010    ) {
 8011        self.transact(cx, |this, cx| {
 8012            this.select_autoclose_pair(cx);
 8013            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8014                let line_mode = s.line_mode;
 8015                s.move_with(|map, selection| {
 8016                    if selection.is_empty() && !line_mode {
 8017                        let cursor = movement::previous_subword_start(map, selection.head());
 8018                        selection.set_head(cursor, SelectionGoal::None);
 8019                    }
 8020                });
 8021            });
 8022            this.insert("", cx);
 8023        });
 8024    }
 8025
 8026    pub fn move_to_next_word_end(&mut self, _: &MoveToNextWordEnd, cx: &mut ViewContext<Self>) {
 8027        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8028            s.move_cursors_with(|map, head, _| {
 8029                (movement::next_word_end(map, head), SelectionGoal::None)
 8030            });
 8031        })
 8032    }
 8033
 8034    pub fn move_to_next_subword_end(
 8035        &mut self,
 8036        _: &MoveToNextSubwordEnd,
 8037        cx: &mut ViewContext<Self>,
 8038    ) {
 8039        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8040            s.move_cursors_with(|map, head, _| {
 8041                (movement::next_subword_end(map, head), SelectionGoal::None)
 8042            });
 8043        })
 8044    }
 8045
 8046    pub fn select_to_next_word_end(&mut self, _: &SelectToNextWordEnd, cx: &mut ViewContext<Self>) {
 8047        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8048            s.move_heads_with(|map, head, _| {
 8049                (movement::next_word_end(map, head), SelectionGoal::None)
 8050            });
 8051        })
 8052    }
 8053
 8054    pub fn select_to_next_subword_end(
 8055        &mut self,
 8056        _: &SelectToNextSubwordEnd,
 8057        cx: &mut ViewContext<Self>,
 8058    ) {
 8059        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8060            s.move_heads_with(|map, head, _| {
 8061                (movement::next_subword_end(map, head), SelectionGoal::None)
 8062            });
 8063        })
 8064    }
 8065
 8066    pub fn delete_to_next_word_end(
 8067        &mut self,
 8068        action: &DeleteToNextWordEnd,
 8069        cx: &mut ViewContext<Self>,
 8070    ) {
 8071        self.transact(cx, |this, cx| {
 8072            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8073                let line_mode = s.line_mode;
 8074                s.move_with(|map, selection| {
 8075                    if selection.is_empty() && !line_mode {
 8076                        let cursor = if action.ignore_newlines {
 8077                            movement::next_word_end(map, selection.head())
 8078                        } else {
 8079                            movement::next_word_end_or_newline(map, selection.head())
 8080                        };
 8081                        selection.set_head(cursor, SelectionGoal::None);
 8082                    }
 8083                });
 8084            });
 8085            this.insert("", cx);
 8086        });
 8087    }
 8088
 8089    pub fn delete_to_next_subword_end(
 8090        &mut self,
 8091        _: &DeleteToNextSubwordEnd,
 8092        cx: &mut ViewContext<Self>,
 8093    ) {
 8094        self.transact(cx, |this, cx| {
 8095            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8096                s.move_with(|map, selection| {
 8097                    if selection.is_empty() {
 8098                        let cursor = movement::next_subword_end(map, selection.head());
 8099                        selection.set_head(cursor, SelectionGoal::None);
 8100                    }
 8101                });
 8102            });
 8103            this.insert("", cx);
 8104        });
 8105    }
 8106
 8107    pub fn move_to_beginning_of_line(
 8108        &mut self,
 8109        action: &MoveToBeginningOfLine,
 8110        cx: &mut ViewContext<Self>,
 8111    ) {
 8112        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8113            s.move_cursors_with(|map, head, _| {
 8114                (
 8115                    movement::indented_line_beginning(map, head, action.stop_at_soft_wraps),
 8116                    SelectionGoal::None,
 8117                )
 8118            });
 8119        })
 8120    }
 8121
 8122    pub fn select_to_beginning_of_line(
 8123        &mut self,
 8124        action: &SelectToBeginningOfLine,
 8125        cx: &mut ViewContext<Self>,
 8126    ) {
 8127        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8128            s.move_heads_with(|map, head, _| {
 8129                (
 8130                    movement::indented_line_beginning(map, head, action.stop_at_soft_wraps),
 8131                    SelectionGoal::None,
 8132                )
 8133            });
 8134        });
 8135    }
 8136
 8137    pub fn delete_to_beginning_of_line(
 8138        &mut self,
 8139        _: &DeleteToBeginningOfLine,
 8140        cx: &mut ViewContext<Self>,
 8141    ) {
 8142        self.transact(cx, |this, cx| {
 8143            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8144                s.move_with(|_, selection| {
 8145                    selection.reversed = true;
 8146                });
 8147            });
 8148
 8149            this.select_to_beginning_of_line(
 8150                &SelectToBeginningOfLine {
 8151                    stop_at_soft_wraps: false,
 8152                },
 8153                cx,
 8154            );
 8155            this.backspace(&Backspace, cx);
 8156        });
 8157    }
 8158
 8159    pub fn move_to_end_of_line(&mut self, action: &MoveToEndOfLine, cx: &mut ViewContext<Self>) {
 8160        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8161            s.move_cursors_with(|map, head, _| {
 8162                (
 8163                    movement::line_end(map, head, action.stop_at_soft_wraps),
 8164                    SelectionGoal::None,
 8165                )
 8166            });
 8167        })
 8168    }
 8169
 8170    pub fn select_to_end_of_line(
 8171        &mut self,
 8172        action: &SelectToEndOfLine,
 8173        cx: &mut ViewContext<Self>,
 8174    ) {
 8175        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8176            s.move_heads_with(|map, head, _| {
 8177                (
 8178                    movement::line_end(map, head, action.stop_at_soft_wraps),
 8179                    SelectionGoal::None,
 8180                )
 8181            });
 8182        })
 8183    }
 8184
 8185    pub fn delete_to_end_of_line(&mut self, _: &DeleteToEndOfLine, cx: &mut ViewContext<Self>) {
 8186        self.transact(cx, |this, cx| {
 8187            this.select_to_end_of_line(
 8188                &SelectToEndOfLine {
 8189                    stop_at_soft_wraps: false,
 8190                },
 8191                cx,
 8192            );
 8193            this.delete(&Delete, cx);
 8194        });
 8195    }
 8196
 8197    pub fn cut_to_end_of_line(&mut self, _: &CutToEndOfLine, cx: &mut ViewContext<Self>) {
 8198        self.transact(cx, |this, cx| {
 8199            this.select_to_end_of_line(
 8200                &SelectToEndOfLine {
 8201                    stop_at_soft_wraps: false,
 8202                },
 8203                cx,
 8204            );
 8205            this.cut(&Cut, cx);
 8206        });
 8207    }
 8208
 8209    pub fn move_to_start_of_paragraph(
 8210        &mut self,
 8211        _: &MoveToStartOfParagraph,
 8212        cx: &mut ViewContext<Self>,
 8213    ) {
 8214        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 8215            cx.propagate();
 8216            return;
 8217        }
 8218
 8219        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8220            s.move_with(|map, selection| {
 8221                selection.collapse_to(
 8222                    movement::start_of_paragraph(map, selection.head(), 1),
 8223                    SelectionGoal::None,
 8224                )
 8225            });
 8226        })
 8227    }
 8228
 8229    pub fn move_to_end_of_paragraph(
 8230        &mut self,
 8231        _: &MoveToEndOfParagraph,
 8232        cx: &mut ViewContext<Self>,
 8233    ) {
 8234        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 8235            cx.propagate();
 8236            return;
 8237        }
 8238
 8239        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8240            s.move_with(|map, selection| {
 8241                selection.collapse_to(
 8242                    movement::end_of_paragraph(map, selection.head(), 1),
 8243                    SelectionGoal::None,
 8244                )
 8245            });
 8246        })
 8247    }
 8248
 8249    pub fn select_to_start_of_paragraph(
 8250        &mut self,
 8251        _: &SelectToStartOfParagraph,
 8252        cx: &mut ViewContext<Self>,
 8253    ) {
 8254        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 8255            cx.propagate();
 8256            return;
 8257        }
 8258
 8259        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8260            s.move_heads_with(|map, head, _| {
 8261                (
 8262                    movement::start_of_paragraph(map, head, 1),
 8263                    SelectionGoal::None,
 8264                )
 8265            });
 8266        })
 8267    }
 8268
 8269    pub fn select_to_end_of_paragraph(
 8270        &mut self,
 8271        _: &SelectToEndOfParagraph,
 8272        cx: &mut ViewContext<Self>,
 8273    ) {
 8274        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 8275            cx.propagate();
 8276            return;
 8277        }
 8278
 8279        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8280            s.move_heads_with(|map, head, _| {
 8281                (
 8282                    movement::end_of_paragraph(map, head, 1),
 8283                    SelectionGoal::None,
 8284                )
 8285            });
 8286        })
 8287    }
 8288
 8289    pub fn move_to_beginning(&mut self, _: &MoveToBeginning, cx: &mut ViewContext<Self>) {
 8290        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 8291            cx.propagate();
 8292            return;
 8293        }
 8294
 8295        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8296            s.select_ranges(vec![0..0]);
 8297        });
 8298    }
 8299
 8300    pub fn select_to_beginning(&mut self, _: &SelectToBeginning, cx: &mut ViewContext<Self>) {
 8301        let mut selection = self.selections.last::<Point>(cx);
 8302        selection.set_head(Point::zero(), SelectionGoal::None);
 8303
 8304        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8305            s.select(vec![selection]);
 8306        });
 8307    }
 8308
 8309    pub fn move_to_end(&mut self, _: &MoveToEnd, cx: &mut ViewContext<Self>) {
 8310        if matches!(self.mode, EditorMode::SingleLine { .. }) {
 8311            cx.propagate();
 8312            return;
 8313        }
 8314
 8315        let cursor = self.buffer.read(cx).read(cx).len();
 8316        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8317            s.select_ranges(vec![cursor..cursor])
 8318        });
 8319    }
 8320
 8321    pub fn set_nav_history(&mut self, nav_history: Option<ItemNavHistory>) {
 8322        self.nav_history = nav_history;
 8323    }
 8324
 8325    pub fn nav_history(&self) -> Option<&ItemNavHistory> {
 8326        self.nav_history.as_ref()
 8327    }
 8328
 8329    fn push_to_nav_history(
 8330        &mut self,
 8331        cursor_anchor: Anchor,
 8332        new_position: Option<Point>,
 8333        cx: &mut ViewContext<Self>,
 8334    ) {
 8335        if let Some(nav_history) = self.nav_history.as_mut() {
 8336            let buffer = self.buffer.read(cx).read(cx);
 8337            let cursor_position = cursor_anchor.to_point(&buffer);
 8338            let scroll_state = self.scroll_manager.anchor();
 8339            let scroll_top_row = scroll_state.top_row(&buffer);
 8340            drop(buffer);
 8341
 8342            if let Some(new_position) = new_position {
 8343                let row_delta = (new_position.row as i64 - cursor_position.row as i64).abs();
 8344                if row_delta < MIN_NAVIGATION_HISTORY_ROW_DELTA {
 8345                    return;
 8346                }
 8347            }
 8348
 8349            nav_history.push(
 8350                Some(NavigationData {
 8351                    cursor_anchor,
 8352                    cursor_position,
 8353                    scroll_anchor: scroll_state,
 8354                    scroll_top_row,
 8355                }),
 8356                cx,
 8357            );
 8358        }
 8359    }
 8360
 8361    pub fn select_to_end(&mut self, _: &SelectToEnd, cx: &mut ViewContext<Self>) {
 8362        let buffer = self.buffer.read(cx).snapshot(cx);
 8363        let mut selection = self.selections.first::<usize>(cx);
 8364        selection.set_head(buffer.len(), SelectionGoal::None);
 8365        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8366            s.select(vec![selection]);
 8367        });
 8368    }
 8369
 8370    pub fn select_all(&mut self, _: &SelectAll, cx: &mut ViewContext<Self>) {
 8371        let end = self.buffer.read(cx).read(cx).len();
 8372        self.change_selections(None, cx, |s| {
 8373            s.select_ranges(vec![0..end]);
 8374        });
 8375    }
 8376
 8377    pub fn select_line(&mut self, _: &SelectLine, cx: &mut ViewContext<Self>) {
 8378        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 8379        let mut selections = self.selections.all::<Point>(cx);
 8380        let max_point = display_map.buffer_snapshot.max_point();
 8381        for selection in &mut selections {
 8382            let rows = selection.spanned_rows(true, &display_map);
 8383            selection.start = Point::new(rows.start.0, 0);
 8384            selection.end = cmp::min(max_point, Point::new(rows.end.0, 0));
 8385            selection.reversed = false;
 8386        }
 8387        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8388            s.select(selections);
 8389        });
 8390    }
 8391
 8392    pub fn split_selection_into_lines(
 8393        &mut self,
 8394        _: &SplitSelectionIntoLines,
 8395        cx: &mut ViewContext<Self>,
 8396    ) {
 8397        let mut to_unfold = Vec::new();
 8398        let mut new_selection_ranges = Vec::new();
 8399        {
 8400            let selections = self.selections.all::<Point>(cx);
 8401            let buffer = self.buffer.read(cx).read(cx);
 8402            for selection in selections {
 8403                for row in selection.start.row..selection.end.row {
 8404                    let cursor = Point::new(row, buffer.line_len(MultiBufferRow(row)));
 8405                    new_selection_ranges.push(cursor..cursor);
 8406                }
 8407                new_selection_ranges.push(selection.end..selection.end);
 8408                to_unfold.push(selection.start..selection.end);
 8409            }
 8410        }
 8411        self.unfold_ranges(&to_unfold, true, true, cx);
 8412        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8413            s.select_ranges(new_selection_ranges);
 8414        });
 8415    }
 8416
 8417    pub fn add_selection_above(&mut self, _: &AddSelectionAbove, cx: &mut ViewContext<Self>) {
 8418        self.add_selection(true, cx);
 8419    }
 8420
 8421    pub fn add_selection_below(&mut self, _: &AddSelectionBelow, cx: &mut ViewContext<Self>) {
 8422        self.add_selection(false, cx);
 8423    }
 8424
 8425    fn add_selection(&mut self, above: bool, cx: &mut ViewContext<Self>) {
 8426        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 8427        let mut selections = self.selections.all::<Point>(cx);
 8428        let text_layout_details = self.text_layout_details(cx);
 8429        let mut state = self.add_selections_state.take().unwrap_or_else(|| {
 8430            let oldest_selection = selections.iter().min_by_key(|s| s.id).unwrap().clone();
 8431            let range = oldest_selection.display_range(&display_map).sorted();
 8432
 8433            let start_x = display_map.x_for_display_point(range.start, &text_layout_details);
 8434            let end_x = display_map.x_for_display_point(range.end, &text_layout_details);
 8435            let positions = start_x.min(end_x)..start_x.max(end_x);
 8436
 8437            selections.clear();
 8438            let mut stack = Vec::new();
 8439            for row in range.start.row().0..=range.end.row().0 {
 8440                if let Some(selection) = self.selections.build_columnar_selection(
 8441                    &display_map,
 8442                    DisplayRow(row),
 8443                    &positions,
 8444                    oldest_selection.reversed,
 8445                    &text_layout_details,
 8446                ) {
 8447                    stack.push(selection.id);
 8448                    selections.push(selection);
 8449                }
 8450            }
 8451
 8452            if above {
 8453                stack.reverse();
 8454            }
 8455
 8456            AddSelectionsState { above, stack }
 8457        });
 8458
 8459        let last_added_selection = *state.stack.last().unwrap();
 8460        let mut new_selections = Vec::new();
 8461        if above == state.above {
 8462            let end_row = if above {
 8463                DisplayRow(0)
 8464            } else {
 8465                display_map.max_point().row()
 8466            };
 8467
 8468            'outer: for selection in selections {
 8469                if selection.id == last_added_selection {
 8470                    let range = selection.display_range(&display_map).sorted();
 8471                    debug_assert_eq!(range.start.row(), range.end.row());
 8472                    let mut row = range.start.row();
 8473                    let positions =
 8474                        if let SelectionGoal::HorizontalRange { start, end } = selection.goal {
 8475                            px(start)..px(end)
 8476                        } else {
 8477                            let start_x =
 8478                                display_map.x_for_display_point(range.start, &text_layout_details);
 8479                            let end_x =
 8480                                display_map.x_for_display_point(range.end, &text_layout_details);
 8481                            start_x.min(end_x)..start_x.max(end_x)
 8482                        };
 8483
 8484                    while row != end_row {
 8485                        if above {
 8486                            row.0 -= 1;
 8487                        } else {
 8488                            row.0 += 1;
 8489                        }
 8490
 8491                        if let Some(new_selection) = self.selections.build_columnar_selection(
 8492                            &display_map,
 8493                            row,
 8494                            &positions,
 8495                            selection.reversed,
 8496                            &text_layout_details,
 8497                        ) {
 8498                            state.stack.push(new_selection.id);
 8499                            if above {
 8500                                new_selections.push(new_selection);
 8501                                new_selections.push(selection);
 8502                            } else {
 8503                                new_selections.push(selection);
 8504                                new_selections.push(new_selection);
 8505                            }
 8506
 8507                            continue 'outer;
 8508                        }
 8509                    }
 8510                }
 8511
 8512                new_selections.push(selection);
 8513            }
 8514        } else {
 8515            new_selections = selections;
 8516            new_selections.retain(|s| s.id != last_added_selection);
 8517            state.stack.pop();
 8518        }
 8519
 8520        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8521            s.select(new_selections);
 8522        });
 8523        if state.stack.len() > 1 {
 8524            self.add_selections_state = Some(state);
 8525        }
 8526    }
 8527
 8528    pub fn select_next_match_internal(
 8529        &mut self,
 8530        display_map: &DisplaySnapshot,
 8531        replace_newest: bool,
 8532        autoscroll: Option<Autoscroll>,
 8533        cx: &mut ViewContext<Self>,
 8534    ) -> Result<()> {
 8535        fn select_next_match_ranges(
 8536            this: &mut Editor,
 8537            range: Range<usize>,
 8538            replace_newest: bool,
 8539            auto_scroll: Option<Autoscroll>,
 8540            cx: &mut ViewContext<Editor>,
 8541        ) {
 8542            this.unfold_ranges(&[range.clone()], false, true, cx);
 8543            this.change_selections(auto_scroll, cx, |s| {
 8544                if replace_newest {
 8545                    s.delete(s.newest_anchor().id);
 8546                }
 8547                s.insert_range(range.clone());
 8548            });
 8549        }
 8550
 8551        let buffer = &display_map.buffer_snapshot;
 8552        let mut selections = self.selections.all::<usize>(cx);
 8553        if let Some(mut select_next_state) = self.select_next_state.take() {
 8554            let query = &select_next_state.query;
 8555            if !select_next_state.done {
 8556                let first_selection = selections.iter().min_by_key(|s| s.id).unwrap();
 8557                let last_selection = selections.iter().max_by_key(|s| s.id).unwrap();
 8558                let mut next_selected_range = None;
 8559
 8560                let bytes_after_last_selection =
 8561                    buffer.bytes_in_range(last_selection.end..buffer.len());
 8562                let bytes_before_first_selection = buffer.bytes_in_range(0..first_selection.start);
 8563                let query_matches = query
 8564                    .stream_find_iter(bytes_after_last_selection)
 8565                    .map(|result| (last_selection.end, result))
 8566                    .chain(
 8567                        query
 8568                            .stream_find_iter(bytes_before_first_selection)
 8569                            .map(|result| (0, result)),
 8570                    );
 8571
 8572                for (start_offset, query_match) in query_matches {
 8573                    let query_match = query_match.unwrap(); // can only fail due to I/O
 8574                    let offset_range =
 8575                        start_offset + query_match.start()..start_offset + query_match.end();
 8576                    let display_range = offset_range.start.to_display_point(display_map)
 8577                        ..offset_range.end.to_display_point(display_map);
 8578
 8579                    if !select_next_state.wordwise
 8580                        || (!movement::is_inside_word(display_map, display_range.start)
 8581                            && !movement::is_inside_word(display_map, display_range.end))
 8582                    {
 8583                        // TODO: This is n^2, because we might check all the selections
 8584                        if !selections
 8585                            .iter()
 8586                            .any(|selection| selection.range().overlaps(&offset_range))
 8587                        {
 8588                            next_selected_range = Some(offset_range);
 8589                            break;
 8590                        }
 8591                    }
 8592                }
 8593
 8594                if let Some(next_selected_range) = next_selected_range {
 8595                    select_next_match_ranges(
 8596                        self,
 8597                        next_selected_range,
 8598                        replace_newest,
 8599                        autoscroll,
 8600                        cx,
 8601                    );
 8602                } else {
 8603                    select_next_state.done = true;
 8604                }
 8605            }
 8606
 8607            self.select_next_state = Some(select_next_state);
 8608        } else {
 8609            let mut only_carets = true;
 8610            let mut same_text_selected = true;
 8611            let mut selected_text = None;
 8612
 8613            let mut selections_iter = selections.iter().peekable();
 8614            while let Some(selection) = selections_iter.next() {
 8615                if selection.start != selection.end {
 8616                    only_carets = false;
 8617                }
 8618
 8619                if same_text_selected {
 8620                    if selected_text.is_none() {
 8621                        selected_text =
 8622                            Some(buffer.text_for_range(selection.range()).collect::<String>());
 8623                    }
 8624
 8625                    if let Some(next_selection) = selections_iter.peek() {
 8626                        if next_selection.range().len() == selection.range().len() {
 8627                            let next_selected_text = buffer
 8628                                .text_for_range(next_selection.range())
 8629                                .collect::<String>();
 8630                            if Some(next_selected_text) != selected_text {
 8631                                same_text_selected = false;
 8632                                selected_text = None;
 8633                            }
 8634                        } else {
 8635                            same_text_selected = false;
 8636                            selected_text = None;
 8637                        }
 8638                    }
 8639                }
 8640            }
 8641
 8642            if only_carets {
 8643                for selection in &mut selections {
 8644                    let word_range = movement::surrounding_word(
 8645                        display_map,
 8646                        selection.start.to_display_point(display_map),
 8647                    );
 8648                    selection.start = word_range.start.to_offset(display_map, Bias::Left);
 8649                    selection.end = word_range.end.to_offset(display_map, Bias::Left);
 8650                    selection.goal = SelectionGoal::None;
 8651                    selection.reversed = false;
 8652                    select_next_match_ranges(
 8653                        self,
 8654                        selection.start..selection.end,
 8655                        replace_newest,
 8656                        autoscroll,
 8657                        cx,
 8658                    );
 8659                }
 8660
 8661                if selections.len() == 1 {
 8662                    let selection = selections
 8663                        .last()
 8664                        .expect("ensured that there's only one selection");
 8665                    let query = buffer
 8666                        .text_for_range(selection.start..selection.end)
 8667                        .collect::<String>();
 8668                    let is_empty = query.is_empty();
 8669                    let select_state = SelectNextState {
 8670                        query: AhoCorasick::new(&[query])?,
 8671                        wordwise: true,
 8672                        done: is_empty,
 8673                    };
 8674                    self.select_next_state = Some(select_state);
 8675                } else {
 8676                    self.select_next_state = None;
 8677                }
 8678            } else if let Some(selected_text) = selected_text {
 8679                self.select_next_state = Some(SelectNextState {
 8680                    query: AhoCorasick::new(&[selected_text])?,
 8681                    wordwise: false,
 8682                    done: false,
 8683                });
 8684                self.select_next_match_internal(display_map, replace_newest, autoscroll, cx)?;
 8685            }
 8686        }
 8687        Ok(())
 8688    }
 8689
 8690    pub fn select_all_matches(
 8691        &mut self,
 8692        _action: &SelectAllMatches,
 8693        cx: &mut ViewContext<Self>,
 8694    ) -> Result<()> {
 8695        self.push_to_selection_history();
 8696        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 8697
 8698        self.select_next_match_internal(&display_map, false, None, cx)?;
 8699        let Some(select_next_state) = self.select_next_state.as_mut() else {
 8700            return Ok(());
 8701        };
 8702        if select_next_state.done {
 8703            return Ok(());
 8704        }
 8705
 8706        let mut new_selections = self.selections.all::<usize>(cx);
 8707
 8708        let buffer = &display_map.buffer_snapshot;
 8709        let query_matches = select_next_state
 8710            .query
 8711            .stream_find_iter(buffer.bytes_in_range(0..buffer.len()));
 8712
 8713        for query_match in query_matches {
 8714            let query_match = query_match.unwrap(); // can only fail due to I/O
 8715            let offset_range = query_match.start()..query_match.end();
 8716            let display_range = offset_range.start.to_display_point(&display_map)
 8717                ..offset_range.end.to_display_point(&display_map);
 8718
 8719            if !select_next_state.wordwise
 8720                || (!movement::is_inside_word(&display_map, display_range.start)
 8721                    && !movement::is_inside_word(&display_map, display_range.end))
 8722            {
 8723                self.selections.change_with(cx, |selections| {
 8724                    new_selections.push(Selection {
 8725                        id: selections.new_selection_id(),
 8726                        start: offset_range.start,
 8727                        end: offset_range.end,
 8728                        reversed: false,
 8729                        goal: SelectionGoal::None,
 8730                    });
 8731                });
 8732            }
 8733        }
 8734
 8735        new_selections.sort_by_key(|selection| selection.start);
 8736        let mut ix = 0;
 8737        while ix + 1 < new_selections.len() {
 8738            let current_selection = &new_selections[ix];
 8739            let next_selection = &new_selections[ix + 1];
 8740            if current_selection.range().overlaps(&next_selection.range()) {
 8741                if current_selection.id < next_selection.id {
 8742                    new_selections.remove(ix + 1);
 8743                } else {
 8744                    new_selections.remove(ix);
 8745                }
 8746            } else {
 8747                ix += 1;
 8748            }
 8749        }
 8750
 8751        select_next_state.done = true;
 8752        self.unfold_ranges(
 8753            &new_selections
 8754                .iter()
 8755                .map(|selection| selection.range())
 8756                .collect::<Vec<_>>(),
 8757            false,
 8758            false,
 8759            cx,
 8760        );
 8761        self.change_selections(Some(Autoscroll::fit()), cx, |selections| {
 8762            selections.select(new_selections)
 8763        });
 8764
 8765        Ok(())
 8766    }
 8767
 8768    pub fn select_next(&mut self, action: &SelectNext, cx: &mut ViewContext<Self>) -> Result<()> {
 8769        self.push_to_selection_history();
 8770        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 8771        self.select_next_match_internal(
 8772            &display_map,
 8773            action.replace_newest,
 8774            Some(Autoscroll::newest()),
 8775            cx,
 8776        )?;
 8777        Ok(())
 8778    }
 8779
 8780    pub fn select_previous(
 8781        &mut self,
 8782        action: &SelectPrevious,
 8783        cx: &mut ViewContext<Self>,
 8784    ) -> Result<()> {
 8785        self.push_to_selection_history();
 8786        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 8787        let buffer = &display_map.buffer_snapshot;
 8788        let mut selections = self.selections.all::<usize>(cx);
 8789        if let Some(mut select_prev_state) = self.select_prev_state.take() {
 8790            let query = &select_prev_state.query;
 8791            if !select_prev_state.done {
 8792                let first_selection = selections.iter().min_by_key(|s| s.id).unwrap();
 8793                let last_selection = selections.iter().max_by_key(|s| s.id).unwrap();
 8794                let mut next_selected_range = None;
 8795                // When we're iterating matches backwards, the oldest match will actually be the furthest one in the buffer.
 8796                let bytes_before_last_selection =
 8797                    buffer.reversed_bytes_in_range(0..last_selection.start);
 8798                let bytes_after_first_selection =
 8799                    buffer.reversed_bytes_in_range(first_selection.end..buffer.len());
 8800                let query_matches = query
 8801                    .stream_find_iter(bytes_before_last_selection)
 8802                    .map(|result| (last_selection.start, result))
 8803                    .chain(
 8804                        query
 8805                            .stream_find_iter(bytes_after_first_selection)
 8806                            .map(|result| (buffer.len(), result)),
 8807                    );
 8808                for (end_offset, query_match) in query_matches {
 8809                    let query_match = query_match.unwrap(); // can only fail due to I/O
 8810                    let offset_range =
 8811                        end_offset - query_match.end()..end_offset - query_match.start();
 8812                    let display_range = offset_range.start.to_display_point(&display_map)
 8813                        ..offset_range.end.to_display_point(&display_map);
 8814
 8815                    if !select_prev_state.wordwise
 8816                        || (!movement::is_inside_word(&display_map, display_range.start)
 8817                            && !movement::is_inside_word(&display_map, display_range.end))
 8818                    {
 8819                        next_selected_range = Some(offset_range);
 8820                        break;
 8821                    }
 8822                }
 8823
 8824                if let Some(next_selected_range) = next_selected_range {
 8825                    self.unfold_ranges(&[next_selected_range.clone()], false, true, cx);
 8826                    self.change_selections(Some(Autoscroll::newest()), cx, |s| {
 8827                        if action.replace_newest {
 8828                            s.delete(s.newest_anchor().id);
 8829                        }
 8830                        s.insert_range(next_selected_range);
 8831                    });
 8832                } else {
 8833                    select_prev_state.done = true;
 8834                }
 8835            }
 8836
 8837            self.select_prev_state = Some(select_prev_state);
 8838        } else {
 8839            let mut only_carets = true;
 8840            let mut same_text_selected = true;
 8841            let mut selected_text = None;
 8842
 8843            let mut selections_iter = selections.iter().peekable();
 8844            while let Some(selection) = selections_iter.next() {
 8845                if selection.start != selection.end {
 8846                    only_carets = false;
 8847                }
 8848
 8849                if same_text_selected {
 8850                    if selected_text.is_none() {
 8851                        selected_text =
 8852                            Some(buffer.text_for_range(selection.range()).collect::<String>());
 8853                    }
 8854
 8855                    if let Some(next_selection) = selections_iter.peek() {
 8856                        if next_selection.range().len() == selection.range().len() {
 8857                            let next_selected_text = buffer
 8858                                .text_for_range(next_selection.range())
 8859                                .collect::<String>();
 8860                            if Some(next_selected_text) != selected_text {
 8861                                same_text_selected = false;
 8862                                selected_text = None;
 8863                            }
 8864                        } else {
 8865                            same_text_selected = false;
 8866                            selected_text = None;
 8867                        }
 8868                    }
 8869                }
 8870            }
 8871
 8872            if only_carets {
 8873                for selection in &mut selections {
 8874                    let word_range = movement::surrounding_word(
 8875                        &display_map,
 8876                        selection.start.to_display_point(&display_map),
 8877                    );
 8878                    selection.start = word_range.start.to_offset(&display_map, Bias::Left);
 8879                    selection.end = word_range.end.to_offset(&display_map, Bias::Left);
 8880                    selection.goal = SelectionGoal::None;
 8881                    selection.reversed = false;
 8882                }
 8883                if selections.len() == 1 {
 8884                    let selection = selections
 8885                        .last()
 8886                        .expect("ensured that there's only one selection");
 8887                    let query = buffer
 8888                        .text_for_range(selection.start..selection.end)
 8889                        .collect::<String>();
 8890                    let is_empty = query.is_empty();
 8891                    let select_state = SelectNextState {
 8892                        query: AhoCorasick::new(&[query.chars().rev().collect::<String>()])?,
 8893                        wordwise: true,
 8894                        done: is_empty,
 8895                    };
 8896                    self.select_prev_state = Some(select_state);
 8897                } else {
 8898                    self.select_prev_state = None;
 8899                }
 8900
 8901                self.unfold_ranges(
 8902                    &selections.iter().map(|s| s.range()).collect::<Vec<_>>(),
 8903                    false,
 8904                    true,
 8905                    cx,
 8906                );
 8907                self.change_selections(Some(Autoscroll::newest()), cx, |s| {
 8908                    s.select(selections);
 8909                });
 8910            } else if let Some(selected_text) = selected_text {
 8911                self.select_prev_state = Some(SelectNextState {
 8912                    query: AhoCorasick::new(&[selected_text.chars().rev().collect::<String>()])?,
 8913                    wordwise: false,
 8914                    done: false,
 8915                });
 8916                self.select_previous(action, cx)?;
 8917            }
 8918        }
 8919        Ok(())
 8920    }
 8921
 8922    pub fn toggle_comments(&mut self, action: &ToggleComments, cx: &mut ViewContext<Self>) {
 8923        if self.read_only(cx) {
 8924            return;
 8925        }
 8926        let text_layout_details = &self.text_layout_details(cx);
 8927        self.transact(cx, |this, cx| {
 8928            let mut selections = this.selections.all::<MultiBufferPoint>(cx);
 8929            let mut edits = Vec::new();
 8930            let mut selection_edit_ranges = Vec::new();
 8931            let mut last_toggled_row = None;
 8932            let snapshot = this.buffer.read(cx).read(cx);
 8933            let empty_str: Arc<str> = Arc::default();
 8934            let mut suffixes_inserted = Vec::new();
 8935            let ignore_indent = action.ignore_indent;
 8936
 8937            fn comment_prefix_range(
 8938                snapshot: &MultiBufferSnapshot,
 8939                row: MultiBufferRow,
 8940                comment_prefix: &str,
 8941                comment_prefix_whitespace: &str,
 8942                ignore_indent: bool,
 8943            ) -> Range<Point> {
 8944                let indent_size = if ignore_indent {
 8945                    0
 8946                } else {
 8947                    snapshot.indent_size_for_line(row).len
 8948                };
 8949
 8950                let start = Point::new(row.0, indent_size);
 8951
 8952                let mut line_bytes = snapshot
 8953                    .bytes_in_range(start..snapshot.max_point())
 8954                    .flatten()
 8955                    .copied();
 8956
 8957                // If this line currently begins with the line comment prefix, then record
 8958                // the range containing the prefix.
 8959                if line_bytes
 8960                    .by_ref()
 8961                    .take(comment_prefix.len())
 8962                    .eq(comment_prefix.bytes())
 8963                {
 8964                    // Include any whitespace that matches the comment prefix.
 8965                    let matching_whitespace_len = line_bytes
 8966                        .zip(comment_prefix_whitespace.bytes())
 8967                        .take_while(|(a, b)| a == b)
 8968                        .count() as u32;
 8969                    let end = Point::new(
 8970                        start.row,
 8971                        start.column + comment_prefix.len() as u32 + matching_whitespace_len,
 8972                    );
 8973                    start..end
 8974                } else {
 8975                    start..start
 8976                }
 8977            }
 8978
 8979            fn comment_suffix_range(
 8980                snapshot: &MultiBufferSnapshot,
 8981                row: MultiBufferRow,
 8982                comment_suffix: &str,
 8983                comment_suffix_has_leading_space: bool,
 8984            ) -> Range<Point> {
 8985                let end = Point::new(row.0, snapshot.line_len(row));
 8986                let suffix_start_column = end.column.saturating_sub(comment_suffix.len() as u32);
 8987
 8988                let mut line_end_bytes = snapshot
 8989                    .bytes_in_range(Point::new(end.row, suffix_start_column.saturating_sub(1))..end)
 8990                    .flatten()
 8991                    .copied();
 8992
 8993                let leading_space_len = if suffix_start_column > 0
 8994                    && line_end_bytes.next() == Some(b' ')
 8995                    && comment_suffix_has_leading_space
 8996                {
 8997                    1
 8998                } else {
 8999                    0
 9000                };
 9001
 9002                // If this line currently begins with the line comment prefix, then record
 9003                // the range containing the prefix.
 9004                if line_end_bytes.by_ref().eq(comment_suffix.bytes()) {
 9005                    let start = Point::new(end.row, suffix_start_column - leading_space_len);
 9006                    start..end
 9007                } else {
 9008                    end..end
 9009                }
 9010            }
 9011
 9012            // TODO: Handle selections that cross excerpts
 9013            for selection in &mut selections {
 9014                let start_column = snapshot
 9015                    .indent_size_for_line(MultiBufferRow(selection.start.row))
 9016                    .len;
 9017                let language = if let Some(language) =
 9018                    snapshot.language_scope_at(Point::new(selection.start.row, start_column))
 9019                {
 9020                    language
 9021                } else {
 9022                    continue;
 9023                };
 9024
 9025                selection_edit_ranges.clear();
 9026
 9027                // If multiple selections contain a given row, avoid processing that
 9028                // row more than once.
 9029                let mut start_row = MultiBufferRow(selection.start.row);
 9030                if last_toggled_row == Some(start_row) {
 9031                    start_row = start_row.next_row();
 9032                }
 9033                let end_row =
 9034                    if selection.end.row > selection.start.row && selection.end.column == 0 {
 9035                        MultiBufferRow(selection.end.row - 1)
 9036                    } else {
 9037                        MultiBufferRow(selection.end.row)
 9038                    };
 9039                last_toggled_row = Some(end_row);
 9040
 9041                if start_row > end_row {
 9042                    continue;
 9043                }
 9044
 9045                // If the language has line comments, toggle those.
 9046                let mut full_comment_prefixes = language.line_comment_prefixes().to_vec();
 9047
 9048                // If ignore_indent is set, trim spaces from the right side of all full_comment_prefixes
 9049                if ignore_indent {
 9050                    full_comment_prefixes = full_comment_prefixes
 9051                        .into_iter()
 9052                        .map(|s| Arc::from(s.trim_end()))
 9053                        .collect();
 9054                }
 9055
 9056                if !full_comment_prefixes.is_empty() {
 9057                    let first_prefix = full_comment_prefixes
 9058                        .first()
 9059                        .expect("prefixes is non-empty");
 9060                    let prefix_trimmed_lengths = full_comment_prefixes
 9061                        .iter()
 9062                        .map(|p| p.trim_end_matches(' ').len())
 9063                        .collect::<SmallVec<[usize; 4]>>();
 9064
 9065                    let mut all_selection_lines_are_comments = true;
 9066
 9067                    for row in start_row.0..=end_row.0 {
 9068                        let row = MultiBufferRow(row);
 9069                        if start_row < end_row && snapshot.is_line_blank(row) {
 9070                            continue;
 9071                        }
 9072
 9073                        let prefix_range = full_comment_prefixes
 9074                            .iter()
 9075                            .zip(prefix_trimmed_lengths.iter().copied())
 9076                            .map(|(prefix, trimmed_prefix_len)| {
 9077                                comment_prefix_range(
 9078                                    snapshot.deref(),
 9079                                    row,
 9080                                    &prefix[..trimmed_prefix_len],
 9081                                    &prefix[trimmed_prefix_len..],
 9082                                    ignore_indent,
 9083                                )
 9084                            })
 9085                            .max_by_key(|range| range.end.column - range.start.column)
 9086                            .expect("prefixes is non-empty");
 9087
 9088                        if prefix_range.is_empty() {
 9089                            all_selection_lines_are_comments = false;
 9090                        }
 9091
 9092                        selection_edit_ranges.push(prefix_range);
 9093                    }
 9094
 9095                    if all_selection_lines_are_comments {
 9096                        edits.extend(
 9097                            selection_edit_ranges
 9098                                .iter()
 9099                                .cloned()
 9100                                .map(|range| (range, empty_str.clone())),
 9101                        );
 9102                    } else {
 9103                        let min_column = selection_edit_ranges
 9104                            .iter()
 9105                            .map(|range| range.start.column)
 9106                            .min()
 9107                            .unwrap_or(0);
 9108                        edits.extend(selection_edit_ranges.iter().map(|range| {
 9109                            let position = Point::new(range.start.row, min_column);
 9110                            (position..position, first_prefix.clone())
 9111                        }));
 9112                    }
 9113                } else if let Some((full_comment_prefix, comment_suffix)) =
 9114                    language.block_comment_delimiters()
 9115                {
 9116                    let comment_prefix = full_comment_prefix.trim_end_matches(' ');
 9117                    let comment_prefix_whitespace = &full_comment_prefix[comment_prefix.len()..];
 9118                    let prefix_range = comment_prefix_range(
 9119                        snapshot.deref(),
 9120                        start_row,
 9121                        comment_prefix,
 9122                        comment_prefix_whitespace,
 9123                        ignore_indent,
 9124                    );
 9125                    let suffix_range = comment_suffix_range(
 9126                        snapshot.deref(),
 9127                        end_row,
 9128                        comment_suffix.trim_start_matches(' '),
 9129                        comment_suffix.starts_with(' '),
 9130                    );
 9131
 9132                    if prefix_range.is_empty() || suffix_range.is_empty() {
 9133                        edits.push((
 9134                            prefix_range.start..prefix_range.start,
 9135                            full_comment_prefix.clone(),
 9136                        ));
 9137                        edits.push((suffix_range.end..suffix_range.end, comment_suffix.clone()));
 9138                        suffixes_inserted.push((end_row, comment_suffix.len()));
 9139                    } else {
 9140                        edits.push((prefix_range, empty_str.clone()));
 9141                        edits.push((suffix_range, empty_str.clone()));
 9142                    }
 9143                } else {
 9144                    continue;
 9145                }
 9146            }
 9147
 9148            drop(snapshot);
 9149            this.buffer.update(cx, |buffer, cx| {
 9150                buffer.edit(edits, None, cx);
 9151            });
 9152
 9153            // Adjust selections so that they end before any comment suffixes that
 9154            // were inserted.
 9155            let mut suffixes_inserted = suffixes_inserted.into_iter().peekable();
 9156            let mut selections = this.selections.all::<Point>(cx);
 9157            let snapshot = this.buffer.read(cx).read(cx);
 9158            for selection in &mut selections {
 9159                while let Some((row, suffix_len)) = suffixes_inserted.peek().copied() {
 9160                    match row.cmp(&MultiBufferRow(selection.end.row)) {
 9161                        Ordering::Less => {
 9162                            suffixes_inserted.next();
 9163                            continue;
 9164                        }
 9165                        Ordering::Greater => break,
 9166                        Ordering::Equal => {
 9167                            if selection.end.column == snapshot.line_len(row) {
 9168                                if selection.is_empty() {
 9169                                    selection.start.column -= suffix_len as u32;
 9170                                }
 9171                                selection.end.column -= suffix_len as u32;
 9172                            }
 9173                            break;
 9174                        }
 9175                    }
 9176                }
 9177            }
 9178
 9179            drop(snapshot);
 9180            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 9181
 9182            let selections = this.selections.all::<Point>(cx);
 9183            let selections_on_single_row = selections.windows(2).all(|selections| {
 9184                selections[0].start.row == selections[1].start.row
 9185                    && selections[0].end.row == selections[1].end.row
 9186                    && selections[0].start.row == selections[0].end.row
 9187            });
 9188            let selections_selecting = selections
 9189                .iter()
 9190                .any(|selection| selection.start != selection.end);
 9191            let advance_downwards = action.advance_downwards
 9192                && selections_on_single_row
 9193                && !selections_selecting
 9194                && !matches!(this.mode, EditorMode::SingleLine { .. });
 9195
 9196            if advance_downwards {
 9197                let snapshot = this.buffer.read(cx).snapshot(cx);
 9198
 9199                this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9200                    s.move_cursors_with(|display_snapshot, display_point, _| {
 9201                        let mut point = display_point.to_point(display_snapshot);
 9202                        point.row += 1;
 9203                        point = snapshot.clip_point(point, Bias::Left);
 9204                        let display_point = point.to_display_point(display_snapshot);
 9205                        let goal = SelectionGoal::HorizontalPosition(
 9206                            display_snapshot
 9207                                .x_for_display_point(display_point, text_layout_details)
 9208                                .into(),
 9209                        );
 9210                        (display_point, goal)
 9211                    })
 9212                });
 9213            }
 9214        });
 9215    }
 9216
 9217    pub fn select_enclosing_symbol(
 9218        &mut self,
 9219        _: &SelectEnclosingSymbol,
 9220        cx: &mut ViewContext<Self>,
 9221    ) {
 9222        let buffer = self.buffer.read(cx).snapshot(cx);
 9223        let old_selections = self.selections.all::<usize>(cx).into_boxed_slice();
 9224
 9225        fn update_selection(
 9226            selection: &Selection<usize>,
 9227            buffer_snap: &MultiBufferSnapshot,
 9228        ) -> Option<Selection<usize>> {
 9229            let cursor = selection.head();
 9230            let (_buffer_id, symbols) = buffer_snap.symbols_containing(cursor, None)?;
 9231            for symbol in symbols.iter().rev() {
 9232                let start = symbol.range.start.to_offset(buffer_snap);
 9233                let end = symbol.range.end.to_offset(buffer_snap);
 9234                let new_range = start..end;
 9235                if start < selection.start || end > selection.end {
 9236                    return Some(Selection {
 9237                        id: selection.id,
 9238                        start: new_range.start,
 9239                        end: new_range.end,
 9240                        goal: SelectionGoal::None,
 9241                        reversed: selection.reversed,
 9242                    });
 9243                }
 9244            }
 9245            None
 9246        }
 9247
 9248        let mut selected_larger_symbol = false;
 9249        let new_selections = old_selections
 9250            .iter()
 9251            .map(|selection| match update_selection(selection, &buffer) {
 9252                Some(new_selection) => {
 9253                    if new_selection.range() != selection.range() {
 9254                        selected_larger_symbol = true;
 9255                    }
 9256                    new_selection
 9257                }
 9258                None => selection.clone(),
 9259            })
 9260            .collect::<Vec<_>>();
 9261
 9262        if selected_larger_symbol {
 9263            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9264                s.select(new_selections);
 9265            });
 9266        }
 9267    }
 9268
 9269    pub fn select_larger_syntax_node(
 9270        &mut self,
 9271        _: &SelectLargerSyntaxNode,
 9272        cx: &mut ViewContext<Self>,
 9273    ) {
 9274        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 9275        let buffer = self.buffer.read(cx).snapshot(cx);
 9276        let old_selections = self.selections.all::<usize>(cx).into_boxed_slice();
 9277
 9278        let mut stack = mem::take(&mut self.select_larger_syntax_node_stack);
 9279        let mut selected_larger_node = false;
 9280        let new_selections = old_selections
 9281            .iter()
 9282            .map(|selection| {
 9283                let old_range = selection.start..selection.end;
 9284                let mut new_range = old_range.clone();
 9285                while let Some(containing_range) =
 9286                    buffer.range_for_syntax_ancestor(new_range.clone())
 9287                {
 9288                    new_range = containing_range;
 9289                    if !display_map.intersects_fold(new_range.start)
 9290                        && !display_map.intersects_fold(new_range.end)
 9291                    {
 9292                        break;
 9293                    }
 9294                }
 9295
 9296                selected_larger_node |= new_range != old_range;
 9297                Selection {
 9298                    id: selection.id,
 9299                    start: new_range.start,
 9300                    end: new_range.end,
 9301                    goal: SelectionGoal::None,
 9302                    reversed: selection.reversed,
 9303                }
 9304            })
 9305            .collect::<Vec<_>>();
 9306
 9307        if selected_larger_node {
 9308            stack.push(old_selections);
 9309            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9310                s.select(new_selections);
 9311            });
 9312        }
 9313        self.select_larger_syntax_node_stack = stack;
 9314    }
 9315
 9316    pub fn select_smaller_syntax_node(
 9317        &mut self,
 9318        _: &SelectSmallerSyntaxNode,
 9319        cx: &mut ViewContext<Self>,
 9320    ) {
 9321        let mut stack = mem::take(&mut self.select_larger_syntax_node_stack);
 9322        if let Some(selections) = stack.pop() {
 9323            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9324                s.select(selections.to_vec());
 9325            });
 9326        }
 9327        self.select_larger_syntax_node_stack = stack;
 9328    }
 9329
 9330    fn refresh_runnables(&mut self, cx: &mut ViewContext<Self>) -> Task<()> {
 9331        if !EditorSettings::get_global(cx).gutter.runnables {
 9332            self.clear_tasks();
 9333            return Task::ready(());
 9334        }
 9335        let project = self.project.as_ref().map(Model::downgrade);
 9336        cx.spawn(|this, mut cx| async move {
 9337            cx.background_executor().timer(UPDATE_DEBOUNCE).await;
 9338            let Some(project) = project.and_then(|p| p.upgrade()) else {
 9339                return;
 9340            };
 9341            let Ok(display_snapshot) = this.update(&mut cx, |this, cx| {
 9342                this.display_map.update(cx, |map, cx| map.snapshot(cx))
 9343            }) else {
 9344                return;
 9345            };
 9346
 9347            let hide_runnables = project
 9348                .update(&mut cx, |project, cx| {
 9349                    // Do not display any test indicators in non-dev server remote projects.
 9350                    project.is_via_collab() && project.ssh_connection_string(cx).is_none()
 9351                })
 9352                .unwrap_or(true);
 9353            if hide_runnables {
 9354                return;
 9355            }
 9356            let new_rows =
 9357                cx.background_executor()
 9358                    .spawn({
 9359                        let snapshot = display_snapshot.clone();
 9360                        async move {
 9361                            Self::fetch_runnable_ranges(&snapshot, Anchor::min()..Anchor::max())
 9362                        }
 9363                    })
 9364                    .await;
 9365            let rows = Self::runnable_rows(project, display_snapshot, new_rows, cx.clone());
 9366
 9367            this.update(&mut cx, |this, _| {
 9368                this.clear_tasks();
 9369                for (key, value) in rows {
 9370                    this.insert_tasks(key, value);
 9371                }
 9372            })
 9373            .ok();
 9374        })
 9375    }
 9376    fn fetch_runnable_ranges(
 9377        snapshot: &DisplaySnapshot,
 9378        range: Range<Anchor>,
 9379    ) -> Vec<language::RunnableRange> {
 9380        snapshot.buffer_snapshot.runnable_ranges(range).collect()
 9381    }
 9382
 9383    fn runnable_rows(
 9384        project: Model<Project>,
 9385        snapshot: DisplaySnapshot,
 9386        runnable_ranges: Vec<RunnableRange>,
 9387        mut cx: AsyncWindowContext,
 9388    ) -> Vec<((BufferId, u32), RunnableTasks)> {
 9389        runnable_ranges
 9390            .into_iter()
 9391            .filter_map(|mut runnable| {
 9392                let tasks = cx
 9393                    .update(|cx| Self::templates_with_tags(&project, &mut runnable.runnable, cx))
 9394                    .ok()?;
 9395                if tasks.is_empty() {
 9396                    return None;
 9397                }
 9398
 9399                let point = runnable.run_range.start.to_point(&snapshot.buffer_snapshot);
 9400
 9401                let row = snapshot
 9402                    .buffer_snapshot
 9403                    .buffer_line_for_row(MultiBufferRow(point.row))?
 9404                    .1
 9405                    .start
 9406                    .row;
 9407
 9408                let context_range =
 9409                    BufferOffset(runnable.full_range.start)..BufferOffset(runnable.full_range.end);
 9410                Some((
 9411                    (runnable.buffer_id, row),
 9412                    RunnableTasks {
 9413                        templates: tasks,
 9414                        offset: MultiBufferOffset(runnable.run_range.start),
 9415                        context_range,
 9416                        column: point.column,
 9417                        extra_variables: runnable.extra_captures,
 9418                    },
 9419                ))
 9420            })
 9421            .collect()
 9422    }
 9423
 9424    fn templates_with_tags(
 9425        project: &Model<Project>,
 9426        runnable: &mut Runnable,
 9427        cx: &WindowContext<'_>,
 9428    ) -> Vec<(TaskSourceKind, TaskTemplate)> {
 9429        let (inventory, worktree_id, file) = project.read_with(cx, |project, cx| {
 9430            let (worktree_id, file) = project
 9431                .buffer_for_id(runnable.buffer, cx)
 9432                .and_then(|buffer| buffer.read(cx).file())
 9433                .map(|file| (file.worktree_id(cx), file.clone()))
 9434                .unzip();
 9435
 9436            (
 9437                project.task_store().read(cx).task_inventory().cloned(),
 9438                worktree_id,
 9439                file,
 9440            )
 9441        });
 9442
 9443        let tags = mem::take(&mut runnable.tags);
 9444        let mut tags: Vec<_> = tags
 9445            .into_iter()
 9446            .flat_map(|tag| {
 9447                let tag = tag.0.clone();
 9448                inventory
 9449                    .as_ref()
 9450                    .into_iter()
 9451                    .flat_map(|inventory| {
 9452                        inventory.read(cx).list_tasks(
 9453                            file.clone(),
 9454                            Some(runnable.language.clone()),
 9455                            worktree_id,
 9456                            cx,
 9457                        )
 9458                    })
 9459                    .filter(move |(_, template)| {
 9460                        template.tags.iter().any(|source_tag| source_tag == &tag)
 9461                    })
 9462            })
 9463            .sorted_by_key(|(kind, _)| kind.to_owned())
 9464            .collect();
 9465        if let Some((leading_tag_source, _)) = tags.first() {
 9466            // Strongest source wins; if we have worktree tag binding, prefer that to
 9467            // global and language bindings;
 9468            // if we have a global binding, prefer that to language binding.
 9469            let first_mismatch = tags
 9470                .iter()
 9471                .position(|(tag_source, _)| tag_source != leading_tag_source);
 9472            if let Some(index) = first_mismatch {
 9473                tags.truncate(index);
 9474            }
 9475        }
 9476
 9477        tags
 9478    }
 9479
 9480    pub fn move_to_enclosing_bracket(
 9481        &mut self,
 9482        _: &MoveToEnclosingBracket,
 9483        cx: &mut ViewContext<Self>,
 9484    ) {
 9485        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9486            s.move_offsets_with(|snapshot, selection| {
 9487                let Some(enclosing_bracket_ranges) =
 9488                    snapshot.enclosing_bracket_ranges(selection.start..selection.end)
 9489                else {
 9490                    return;
 9491                };
 9492
 9493                let mut best_length = usize::MAX;
 9494                let mut best_inside = false;
 9495                let mut best_in_bracket_range = false;
 9496                let mut best_destination = None;
 9497                for (open, close) in enclosing_bracket_ranges {
 9498                    let close = close.to_inclusive();
 9499                    let length = close.end() - open.start;
 9500                    let inside = selection.start >= open.end && selection.end <= *close.start();
 9501                    let in_bracket_range = open.to_inclusive().contains(&selection.head())
 9502                        || close.contains(&selection.head());
 9503
 9504                    // If best is next to a bracket and current isn't, skip
 9505                    if !in_bracket_range && best_in_bracket_range {
 9506                        continue;
 9507                    }
 9508
 9509                    // Prefer smaller lengths unless best is inside and current isn't
 9510                    if length > best_length && (best_inside || !inside) {
 9511                        continue;
 9512                    }
 9513
 9514                    best_length = length;
 9515                    best_inside = inside;
 9516                    best_in_bracket_range = in_bracket_range;
 9517                    best_destination = Some(
 9518                        if close.contains(&selection.start) && close.contains(&selection.end) {
 9519                            if inside {
 9520                                open.end
 9521                            } else {
 9522                                open.start
 9523                            }
 9524                        } else if inside {
 9525                            *close.start()
 9526                        } else {
 9527                            *close.end()
 9528                        },
 9529                    );
 9530                }
 9531
 9532                if let Some(destination) = best_destination {
 9533                    selection.collapse_to(destination, SelectionGoal::None);
 9534                }
 9535            })
 9536        });
 9537    }
 9538
 9539    pub fn undo_selection(&mut self, _: &UndoSelection, cx: &mut ViewContext<Self>) {
 9540        self.end_selection(cx);
 9541        self.selection_history.mode = SelectionHistoryMode::Undoing;
 9542        if let Some(entry) = self.selection_history.undo_stack.pop_back() {
 9543            self.change_selections(None, cx, |s| s.select_anchors(entry.selections.to_vec()));
 9544            self.select_next_state = entry.select_next_state;
 9545            self.select_prev_state = entry.select_prev_state;
 9546            self.add_selections_state = entry.add_selections_state;
 9547            self.request_autoscroll(Autoscroll::newest(), cx);
 9548        }
 9549        self.selection_history.mode = SelectionHistoryMode::Normal;
 9550    }
 9551
 9552    pub fn redo_selection(&mut self, _: &RedoSelection, cx: &mut ViewContext<Self>) {
 9553        self.end_selection(cx);
 9554        self.selection_history.mode = SelectionHistoryMode::Redoing;
 9555        if let Some(entry) = self.selection_history.redo_stack.pop_back() {
 9556            self.change_selections(None, cx, |s| s.select_anchors(entry.selections.to_vec()));
 9557            self.select_next_state = entry.select_next_state;
 9558            self.select_prev_state = entry.select_prev_state;
 9559            self.add_selections_state = entry.add_selections_state;
 9560            self.request_autoscroll(Autoscroll::newest(), cx);
 9561        }
 9562        self.selection_history.mode = SelectionHistoryMode::Normal;
 9563    }
 9564
 9565    pub fn expand_excerpts(&mut self, action: &ExpandExcerpts, cx: &mut ViewContext<Self>) {
 9566        self.expand_excerpts_for_direction(action.lines, ExpandExcerptDirection::UpAndDown, cx)
 9567    }
 9568
 9569    pub fn expand_excerpts_down(
 9570        &mut self,
 9571        action: &ExpandExcerptsDown,
 9572        cx: &mut ViewContext<Self>,
 9573    ) {
 9574        self.expand_excerpts_for_direction(action.lines, ExpandExcerptDirection::Down, cx)
 9575    }
 9576
 9577    pub fn expand_excerpts_up(&mut self, action: &ExpandExcerptsUp, cx: &mut ViewContext<Self>) {
 9578        self.expand_excerpts_for_direction(action.lines, ExpandExcerptDirection::Up, cx)
 9579    }
 9580
 9581    pub fn expand_excerpts_for_direction(
 9582        &mut self,
 9583        lines: u32,
 9584        direction: ExpandExcerptDirection,
 9585        cx: &mut ViewContext<Self>,
 9586    ) {
 9587        let selections = self.selections.disjoint_anchors();
 9588
 9589        let lines = if lines == 0 {
 9590            EditorSettings::get_global(cx).expand_excerpt_lines
 9591        } else {
 9592            lines
 9593        };
 9594
 9595        self.buffer.update(cx, |buffer, cx| {
 9596            buffer.expand_excerpts(
 9597                selections
 9598                    .iter()
 9599                    .map(|selection| selection.head().excerpt_id)
 9600                    .dedup(),
 9601                lines,
 9602                direction,
 9603                cx,
 9604            )
 9605        })
 9606    }
 9607
 9608    pub fn expand_excerpt(
 9609        &mut self,
 9610        excerpt: ExcerptId,
 9611        direction: ExpandExcerptDirection,
 9612        cx: &mut ViewContext<Self>,
 9613    ) {
 9614        let lines = EditorSettings::get_global(cx).expand_excerpt_lines;
 9615        self.buffer.update(cx, |buffer, cx| {
 9616            buffer.expand_excerpts([excerpt], lines, direction, cx)
 9617        })
 9618    }
 9619
 9620    fn go_to_diagnostic(&mut self, _: &GoToDiagnostic, cx: &mut ViewContext<Self>) {
 9621        self.go_to_diagnostic_impl(Direction::Next, cx)
 9622    }
 9623
 9624    fn go_to_prev_diagnostic(&mut self, _: &GoToPrevDiagnostic, cx: &mut ViewContext<Self>) {
 9625        self.go_to_diagnostic_impl(Direction::Prev, cx)
 9626    }
 9627
 9628    pub fn go_to_diagnostic_impl(&mut self, direction: Direction, cx: &mut ViewContext<Self>) {
 9629        let buffer = self.buffer.read(cx).snapshot(cx);
 9630        let selection = self.selections.newest::<usize>(cx);
 9631
 9632        // If there is an active Diagnostic Popover jump to its diagnostic instead.
 9633        if direction == Direction::Next {
 9634            if let Some(popover) = self.hover_state.diagnostic_popover.as_ref() {
 9635                let (group_id, jump_to) = popover.activation_info();
 9636                if self.activate_diagnostics(group_id, cx) {
 9637                    self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9638                        let mut new_selection = s.newest_anchor().clone();
 9639                        new_selection.collapse_to(jump_to, SelectionGoal::None);
 9640                        s.select_anchors(vec![new_selection.clone()]);
 9641                    });
 9642                }
 9643                return;
 9644            }
 9645        }
 9646
 9647        let mut active_primary_range = self.active_diagnostics.as_ref().map(|active_diagnostics| {
 9648            active_diagnostics
 9649                .primary_range
 9650                .to_offset(&buffer)
 9651                .to_inclusive()
 9652        });
 9653        let mut search_start = if let Some(active_primary_range) = active_primary_range.as_ref() {
 9654            if active_primary_range.contains(&selection.head()) {
 9655                *active_primary_range.start()
 9656            } else {
 9657                selection.head()
 9658            }
 9659        } else {
 9660            selection.head()
 9661        };
 9662        let snapshot = self.snapshot(cx);
 9663        loop {
 9664            let diagnostics = if direction == Direction::Prev {
 9665                buffer.diagnostics_in_range::<_, usize>(0..search_start, true)
 9666            } else {
 9667                buffer.diagnostics_in_range::<_, usize>(search_start..buffer.len(), false)
 9668            }
 9669            .filter(|diagnostic| !snapshot.intersects_fold(diagnostic.range.start));
 9670            let group = diagnostics
 9671                // relies on diagnostics_in_range to return diagnostics with the same starting range to
 9672                // be sorted in a stable way
 9673                // skip until we are at current active diagnostic, if it exists
 9674                .skip_while(|entry| {
 9675                    (match direction {
 9676                        Direction::Prev => entry.range.start >= search_start,
 9677                        Direction::Next => entry.range.start <= search_start,
 9678                    }) && self
 9679                        .active_diagnostics
 9680                        .as_ref()
 9681                        .is_some_and(|a| a.group_id != entry.diagnostic.group_id)
 9682                })
 9683                .find_map(|entry| {
 9684                    if entry.diagnostic.is_primary
 9685                        && entry.diagnostic.severity <= DiagnosticSeverity::WARNING
 9686                        && !entry.range.is_empty()
 9687                        // if we match with the active diagnostic, skip it
 9688                        && Some(entry.diagnostic.group_id)
 9689                            != self.active_diagnostics.as_ref().map(|d| d.group_id)
 9690                    {
 9691                        Some((entry.range, entry.diagnostic.group_id))
 9692                    } else {
 9693                        None
 9694                    }
 9695                });
 9696
 9697            if let Some((primary_range, group_id)) = group {
 9698                if self.activate_diagnostics(group_id, cx) {
 9699                    self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9700                        s.select(vec![Selection {
 9701                            id: selection.id,
 9702                            start: primary_range.start,
 9703                            end: primary_range.start,
 9704                            reversed: false,
 9705                            goal: SelectionGoal::None,
 9706                        }]);
 9707                    });
 9708                }
 9709                break;
 9710            } else {
 9711                // Cycle around to the start of the buffer, potentially moving back to the start of
 9712                // the currently active diagnostic.
 9713                active_primary_range.take();
 9714                if direction == Direction::Prev {
 9715                    if search_start == buffer.len() {
 9716                        break;
 9717                    } else {
 9718                        search_start = buffer.len();
 9719                    }
 9720                } else if search_start == 0 {
 9721                    break;
 9722                } else {
 9723                    search_start = 0;
 9724                }
 9725            }
 9726        }
 9727    }
 9728
 9729    fn go_to_next_hunk(&mut self, _: &GoToHunk, cx: &mut ViewContext<Self>) {
 9730        let snapshot = self
 9731            .display_map
 9732            .update(cx, |display_map, cx| display_map.snapshot(cx));
 9733        let selection = self.selections.newest::<Point>(cx);
 9734        self.go_to_hunk_after_position(&snapshot, selection.head(), cx);
 9735    }
 9736
 9737    fn go_to_hunk_after_position(
 9738        &mut self,
 9739        snapshot: &DisplaySnapshot,
 9740        position: Point,
 9741        cx: &mut ViewContext<'_, Editor>,
 9742    ) -> Option<MultiBufferDiffHunk> {
 9743        if let Some(hunk) = self.go_to_next_hunk_in_direction(
 9744            snapshot,
 9745            position,
 9746            false,
 9747            snapshot
 9748                .buffer_snapshot
 9749                .git_diff_hunks_in_range(MultiBufferRow(position.row + 1)..MultiBufferRow::MAX),
 9750            cx,
 9751        ) {
 9752            return Some(hunk);
 9753        }
 9754
 9755        let wrapped_point = Point::zero();
 9756        self.go_to_next_hunk_in_direction(
 9757            snapshot,
 9758            wrapped_point,
 9759            true,
 9760            snapshot.buffer_snapshot.git_diff_hunks_in_range(
 9761                MultiBufferRow(wrapped_point.row + 1)..MultiBufferRow::MAX,
 9762            ),
 9763            cx,
 9764        )
 9765    }
 9766
 9767    fn go_to_prev_hunk(&mut self, _: &GoToPrevHunk, cx: &mut ViewContext<Self>) {
 9768        let snapshot = self
 9769            .display_map
 9770            .update(cx, |display_map, cx| display_map.snapshot(cx));
 9771        let selection = self.selections.newest::<Point>(cx);
 9772
 9773        self.go_to_hunk_before_position(&snapshot, selection.head(), cx);
 9774    }
 9775
 9776    fn go_to_hunk_before_position(
 9777        &mut self,
 9778        snapshot: &DisplaySnapshot,
 9779        position: Point,
 9780        cx: &mut ViewContext<'_, Editor>,
 9781    ) -> Option<MultiBufferDiffHunk> {
 9782        if let Some(hunk) = self.go_to_next_hunk_in_direction(
 9783            snapshot,
 9784            position,
 9785            false,
 9786            snapshot
 9787                .buffer_snapshot
 9788                .git_diff_hunks_in_range_rev(MultiBufferRow(0)..MultiBufferRow(position.row)),
 9789            cx,
 9790        ) {
 9791            return Some(hunk);
 9792        }
 9793
 9794        let wrapped_point = snapshot.buffer_snapshot.max_point();
 9795        self.go_to_next_hunk_in_direction(
 9796            snapshot,
 9797            wrapped_point,
 9798            true,
 9799            snapshot
 9800                .buffer_snapshot
 9801                .git_diff_hunks_in_range_rev(MultiBufferRow(0)..MultiBufferRow(wrapped_point.row)),
 9802            cx,
 9803        )
 9804    }
 9805
 9806    fn go_to_next_hunk_in_direction(
 9807        &mut self,
 9808        snapshot: &DisplaySnapshot,
 9809        initial_point: Point,
 9810        is_wrapped: bool,
 9811        hunks: impl Iterator<Item = MultiBufferDiffHunk>,
 9812        cx: &mut ViewContext<Editor>,
 9813    ) -> Option<MultiBufferDiffHunk> {
 9814        let display_point = initial_point.to_display_point(snapshot);
 9815        let mut hunks = hunks
 9816            .map(|hunk| (diff_hunk_to_display(&hunk, snapshot), hunk))
 9817            .filter(|(display_hunk, _)| {
 9818                is_wrapped || !display_hunk.contains_display_row(display_point.row())
 9819            })
 9820            .dedup();
 9821
 9822        if let Some((display_hunk, hunk)) = hunks.next() {
 9823            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9824                let row = display_hunk.start_display_row();
 9825                let point = DisplayPoint::new(row, 0);
 9826                s.select_display_ranges([point..point]);
 9827            });
 9828
 9829            Some(hunk)
 9830        } else {
 9831            None
 9832        }
 9833    }
 9834
 9835    pub fn go_to_definition(
 9836        &mut self,
 9837        _: &GoToDefinition,
 9838        cx: &mut ViewContext<Self>,
 9839    ) -> Task<Result<Navigated>> {
 9840        let definition = self.go_to_definition_of_kind(GotoDefinitionKind::Symbol, false, cx);
 9841        cx.spawn(|editor, mut cx| async move {
 9842            if definition.await? == Navigated::Yes {
 9843                return Ok(Navigated::Yes);
 9844            }
 9845            match editor.update(&mut cx, |editor, cx| {
 9846                editor.find_all_references(&FindAllReferences, cx)
 9847            })? {
 9848                Some(references) => references.await,
 9849                None => Ok(Navigated::No),
 9850            }
 9851        })
 9852    }
 9853
 9854    pub fn go_to_declaration(
 9855        &mut self,
 9856        _: &GoToDeclaration,
 9857        cx: &mut ViewContext<Self>,
 9858    ) -> Task<Result<Navigated>> {
 9859        self.go_to_definition_of_kind(GotoDefinitionKind::Declaration, false, cx)
 9860    }
 9861
 9862    pub fn go_to_declaration_split(
 9863        &mut self,
 9864        _: &GoToDeclaration,
 9865        cx: &mut ViewContext<Self>,
 9866    ) -> Task<Result<Navigated>> {
 9867        self.go_to_definition_of_kind(GotoDefinitionKind::Declaration, true, cx)
 9868    }
 9869
 9870    pub fn go_to_implementation(
 9871        &mut self,
 9872        _: &GoToImplementation,
 9873        cx: &mut ViewContext<Self>,
 9874    ) -> Task<Result<Navigated>> {
 9875        self.go_to_definition_of_kind(GotoDefinitionKind::Implementation, false, cx)
 9876    }
 9877
 9878    pub fn go_to_implementation_split(
 9879        &mut self,
 9880        _: &GoToImplementationSplit,
 9881        cx: &mut ViewContext<Self>,
 9882    ) -> Task<Result<Navigated>> {
 9883        self.go_to_definition_of_kind(GotoDefinitionKind::Implementation, true, cx)
 9884    }
 9885
 9886    pub fn go_to_type_definition(
 9887        &mut self,
 9888        _: &GoToTypeDefinition,
 9889        cx: &mut ViewContext<Self>,
 9890    ) -> Task<Result<Navigated>> {
 9891        self.go_to_definition_of_kind(GotoDefinitionKind::Type, false, cx)
 9892    }
 9893
 9894    pub fn go_to_definition_split(
 9895        &mut self,
 9896        _: &GoToDefinitionSplit,
 9897        cx: &mut ViewContext<Self>,
 9898    ) -> Task<Result<Navigated>> {
 9899        self.go_to_definition_of_kind(GotoDefinitionKind::Symbol, true, cx)
 9900    }
 9901
 9902    pub fn go_to_type_definition_split(
 9903        &mut self,
 9904        _: &GoToTypeDefinitionSplit,
 9905        cx: &mut ViewContext<Self>,
 9906    ) -> Task<Result<Navigated>> {
 9907        self.go_to_definition_of_kind(GotoDefinitionKind::Type, true, cx)
 9908    }
 9909
 9910    fn go_to_definition_of_kind(
 9911        &mut self,
 9912        kind: GotoDefinitionKind,
 9913        split: bool,
 9914        cx: &mut ViewContext<Self>,
 9915    ) -> Task<Result<Navigated>> {
 9916        let Some(provider) = self.semantics_provider.clone() else {
 9917            return Task::ready(Ok(Navigated::No));
 9918        };
 9919        let head = self.selections.newest::<usize>(cx).head();
 9920        let buffer = self.buffer.read(cx);
 9921        let (buffer, head) = if let Some(text_anchor) = buffer.text_anchor_for_position(head, cx) {
 9922            text_anchor
 9923        } else {
 9924            return Task::ready(Ok(Navigated::No));
 9925        };
 9926
 9927        let Some(definitions) = provider.definitions(&buffer, head, kind, cx) else {
 9928            return Task::ready(Ok(Navigated::No));
 9929        };
 9930
 9931        cx.spawn(|editor, mut cx| async move {
 9932            let definitions = definitions.await?;
 9933            let navigated = editor
 9934                .update(&mut cx, |editor, cx| {
 9935                    editor.navigate_to_hover_links(
 9936                        Some(kind),
 9937                        definitions
 9938                            .into_iter()
 9939                            .filter(|location| {
 9940                                hover_links::exclude_link_to_position(&buffer, &head, location, cx)
 9941                            })
 9942                            .map(HoverLink::Text)
 9943                            .collect::<Vec<_>>(),
 9944                        split,
 9945                        cx,
 9946                    )
 9947                })?
 9948                .await?;
 9949            anyhow::Ok(navigated)
 9950        })
 9951    }
 9952
 9953    pub fn open_url(&mut self, _: &OpenUrl, cx: &mut ViewContext<Self>) {
 9954        let position = self.selections.newest_anchor().head();
 9955        let Some((buffer, buffer_position)) =
 9956            self.buffer.read(cx).text_anchor_for_position(position, cx)
 9957        else {
 9958            return;
 9959        };
 9960
 9961        cx.spawn(|editor, mut cx| async move {
 9962            if let Some((_, url)) = find_url(&buffer, buffer_position, cx.clone()) {
 9963                editor.update(&mut cx, |_, cx| {
 9964                    cx.open_url(&url);
 9965                })
 9966            } else {
 9967                Ok(())
 9968            }
 9969        })
 9970        .detach();
 9971    }
 9972
 9973    pub fn open_file(&mut self, _: &OpenFile, cx: &mut ViewContext<Self>) {
 9974        let Some(workspace) = self.workspace() else {
 9975            return;
 9976        };
 9977
 9978        let position = self.selections.newest_anchor().head();
 9979
 9980        let Some((buffer, buffer_position)) =
 9981            self.buffer.read(cx).text_anchor_for_position(position, cx)
 9982        else {
 9983            return;
 9984        };
 9985
 9986        let project = self.project.clone();
 9987
 9988        cx.spawn(|_, mut cx| async move {
 9989            let result = find_file(&buffer, project, buffer_position, &mut cx).await;
 9990
 9991            if let Some((_, path)) = result {
 9992                workspace
 9993                    .update(&mut cx, |workspace, cx| {
 9994                        workspace.open_resolved_path(path, cx)
 9995                    })?
 9996                    .await?;
 9997            }
 9998            anyhow::Ok(())
 9999        })
10000        .detach();
10001    }
10002
10003    pub(crate) fn navigate_to_hover_links(
10004        &mut self,
10005        kind: Option<GotoDefinitionKind>,
10006        mut definitions: Vec<HoverLink>,
10007        split: bool,
10008        cx: &mut ViewContext<Editor>,
10009    ) -> Task<Result<Navigated>> {
10010        // If there is one definition, just open it directly
10011        if definitions.len() == 1 {
10012            let definition = definitions.pop().unwrap();
10013
10014            enum TargetTaskResult {
10015                Location(Option<Location>),
10016                AlreadyNavigated,
10017            }
10018
10019            let target_task = match definition {
10020                HoverLink::Text(link) => {
10021                    Task::ready(anyhow::Ok(TargetTaskResult::Location(Some(link.target))))
10022                }
10023                HoverLink::InlayHint(lsp_location, server_id) => {
10024                    let computation = self.compute_target_location(lsp_location, server_id, cx);
10025                    cx.background_executor().spawn(async move {
10026                        let location = computation.await?;
10027                        Ok(TargetTaskResult::Location(location))
10028                    })
10029                }
10030                HoverLink::Url(url) => {
10031                    cx.open_url(&url);
10032                    Task::ready(Ok(TargetTaskResult::AlreadyNavigated))
10033                }
10034                HoverLink::File(path) => {
10035                    if let Some(workspace) = self.workspace() {
10036                        cx.spawn(|_, mut cx| async move {
10037                            workspace
10038                                .update(&mut cx, |workspace, cx| {
10039                                    workspace.open_resolved_path(path, cx)
10040                                })?
10041                                .await
10042                                .map(|_| TargetTaskResult::AlreadyNavigated)
10043                        })
10044                    } else {
10045                        Task::ready(Ok(TargetTaskResult::Location(None)))
10046                    }
10047                }
10048            };
10049            cx.spawn(|editor, mut cx| async move {
10050                let target = match target_task.await.context("target resolution task")? {
10051                    TargetTaskResult::AlreadyNavigated => return Ok(Navigated::Yes),
10052                    TargetTaskResult::Location(None) => return Ok(Navigated::No),
10053                    TargetTaskResult::Location(Some(target)) => target,
10054                };
10055
10056                editor.update(&mut cx, |editor, cx| {
10057                    let Some(workspace) = editor.workspace() else {
10058                        return Navigated::No;
10059                    };
10060                    let pane = workspace.read(cx).active_pane().clone();
10061
10062                    let range = target.range.to_offset(target.buffer.read(cx));
10063                    let range = editor.range_for_match(&range);
10064
10065                    if Some(&target.buffer) == editor.buffer.read(cx).as_singleton().as_ref() {
10066                        let buffer = target.buffer.read(cx);
10067                        let range = check_multiline_range(buffer, range);
10068                        editor.change_selections(Some(Autoscroll::fit()), cx, |s| {
10069                            s.select_ranges([range]);
10070                        });
10071                    } else {
10072                        cx.window_context().defer(move |cx| {
10073                            let target_editor: View<Self> =
10074                                workspace.update(cx, |workspace, cx| {
10075                                    let pane = if split {
10076                                        workspace.adjacent_pane(cx)
10077                                    } else {
10078                                        workspace.active_pane().clone()
10079                                    };
10080
10081                                    workspace.open_project_item(
10082                                        pane,
10083                                        target.buffer.clone(),
10084                                        true,
10085                                        true,
10086                                        cx,
10087                                    )
10088                                });
10089                            target_editor.update(cx, |target_editor, cx| {
10090                                // When selecting a definition in a different buffer, disable the nav history
10091                                // to avoid creating a history entry at the previous cursor location.
10092                                pane.update(cx, |pane, _| pane.disable_history());
10093                                let buffer = target.buffer.read(cx);
10094                                let range = check_multiline_range(buffer, range);
10095                                target_editor.change_selections(
10096                                    Some(Autoscroll::focused()),
10097                                    cx,
10098                                    |s| {
10099                                        s.select_ranges([range]);
10100                                    },
10101                                );
10102                                pane.update(cx, |pane, _| pane.enable_history());
10103                            });
10104                        });
10105                    }
10106                    Navigated::Yes
10107                })
10108            })
10109        } else if !definitions.is_empty() {
10110            cx.spawn(|editor, mut cx| async move {
10111                let (title, location_tasks, workspace) = editor
10112                    .update(&mut cx, |editor, cx| {
10113                        let tab_kind = match kind {
10114                            Some(GotoDefinitionKind::Implementation) => "Implementations",
10115                            _ => "Definitions",
10116                        };
10117                        let title = definitions
10118                            .iter()
10119                            .find_map(|definition| match definition {
10120                                HoverLink::Text(link) => link.origin.as_ref().map(|origin| {
10121                                    let buffer = origin.buffer.read(cx);
10122                                    format!(
10123                                        "{} for {}",
10124                                        tab_kind,
10125                                        buffer
10126                                            .text_for_range(origin.range.clone())
10127                                            .collect::<String>()
10128                                    )
10129                                }),
10130                                HoverLink::InlayHint(_, _) => None,
10131                                HoverLink::Url(_) => None,
10132                                HoverLink::File(_) => None,
10133                            })
10134                            .unwrap_or(tab_kind.to_string());
10135                        let location_tasks = definitions
10136                            .into_iter()
10137                            .map(|definition| match definition {
10138                                HoverLink::Text(link) => Task::Ready(Some(Ok(Some(link.target)))),
10139                                HoverLink::InlayHint(lsp_location, server_id) => {
10140                                    editor.compute_target_location(lsp_location, server_id, cx)
10141                                }
10142                                HoverLink::Url(_) => Task::ready(Ok(None)),
10143                                HoverLink::File(_) => Task::ready(Ok(None)),
10144                            })
10145                            .collect::<Vec<_>>();
10146                        (title, location_tasks, editor.workspace().clone())
10147                    })
10148                    .context("location tasks preparation")?;
10149
10150                let locations = future::join_all(location_tasks)
10151                    .await
10152                    .into_iter()
10153                    .filter_map(|location| location.transpose())
10154                    .collect::<Result<_>>()
10155                    .context("location tasks")?;
10156
10157                let Some(workspace) = workspace else {
10158                    return Ok(Navigated::No);
10159                };
10160                let opened = workspace
10161                    .update(&mut cx, |workspace, cx| {
10162                        Self::open_locations_in_multibuffer(workspace, locations, title, split, cx)
10163                    })
10164                    .ok();
10165
10166                anyhow::Ok(Navigated::from_bool(opened.is_some()))
10167            })
10168        } else {
10169            Task::ready(Ok(Navigated::No))
10170        }
10171    }
10172
10173    fn compute_target_location(
10174        &self,
10175        lsp_location: lsp::Location,
10176        server_id: LanguageServerId,
10177        cx: &mut ViewContext<Self>,
10178    ) -> Task<anyhow::Result<Option<Location>>> {
10179        let Some(project) = self.project.clone() else {
10180            return Task::Ready(Some(Ok(None)));
10181        };
10182
10183        cx.spawn(move |editor, mut cx| async move {
10184            let location_task = editor.update(&mut cx, |_, cx| {
10185                project.update(cx, |project, cx| {
10186                    let language_server_name = project
10187                        .language_server_statuses(cx)
10188                        .find(|(id, _)| server_id == *id)
10189                        .map(|(_, status)| LanguageServerName::from(status.name.as_str()));
10190                    language_server_name.map(|language_server_name| {
10191                        project.open_local_buffer_via_lsp(
10192                            lsp_location.uri.clone(),
10193                            server_id,
10194                            language_server_name,
10195                            cx,
10196                        )
10197                    })
10198                })
10199            })?;
10200            let location = match location_task {
10201                Some(task) => Some({
10202                    let target_buffer_handle = task.await.context("open local buffer")?;
10203                    let range = target_buffer_handle.update(&mut cx, |target_buffer, _| {
10204                        let target_start = target_buffer
10205                            .clip_point_utf16(point_from_lsp(lsp_location.range.start), Bias::Left);
10206                        let target_end = target_buffer
10207                            .clip_point_utf16(point_from_lsp(lsp_location.range.end), Bias::Left);
10208                        target_buffer.anchor_after(target_start)
10209                            ..target_buffer.anchor_before(target_end)
10210                    })?;
10211                    Location {
10212                        buffer: target_buffer_handle,
10213                        range,
10214                    }
10215                }),
10216                None => None,
10217            };
10218            Ok(location)
10219        })
10220    }
10221
10222    pub fn find_all_references(
10223        &mut self,
10224        _: &FindAllReferences,
10225        cx: &mut ViewContext<Self>,
10226    ) -> Option<Task<Result<Navigated>>> {
10227        let selection = self.selections.newest::<usize>(cx);
10228        let multi_buffer = self.buffer.read(cx);
10229        let head = selection.head();
10230
10231        let multi_buffer_snapshot = multi_buffer.snapshot(cx);
10232        let head_anchor = multi_buffer_snapshot.anchor_at(
10233            head,
10234            if head < selection.tail() {
10235                Bias::Right
10236            } else {
10237                Bias::Left
10238            },
10239        );
10240
10241        match self
10242            .find_all_references_task_sources
10243            .binary_search_by(|anchor| anchor.cmp(&head_anchor, &multi_buffer_snapshot))
10244        {
10245            Ok(_) => {
10246                log::info!(
10247                    "Ignoring repeated FindAllReferences invocation with the position of already running task"
10248                );
10249                return None;
10250            }
10251            Err(i) => {
10252                self.find_all_references_task_sources.insert(i, head_anchor);
10253            }
10254        }
10255
10256        let (buffer, head) = multi_buffer.text_anchor_for_position(head, cx)?;
10257        let workspace = self.workspace()?;
10258        let project = workspace.read(cx).project().clone();
10259        let references = project.update(cx, |project, cx| project.references(&buffer, head, cx));
10260        Some(cx.spawn(|editor, mut cx| async move {
10261            let _cleanup = defer({
10262                let mut cx = cx.clone();
10263                move || {
10264                    let _ = editor.update(&mut cx, |editor, _| {
10265                        if let Ok(i) =
10266                            editor
10267                                .find_all_references_task_sources
10268                                .binary_search_by(|anchor| {
10269                                    anchor.cmp(&head_anchor, &multi_buffer_snapshot)
10270                                })
10271                        {
10272                            editor.find_all_references_task_sources.remove(i);
10273                        }
10274                    });
10275                }
10276            });
10277
10278            let locations = references.await?;
10279            if locations.is_empty() {
10280                return anyhow::Ok(Navigated::No);
10281            }
10282
10283            workspace.update(&mut cx, |workspace, cx| {
10284                let title = locations
10285                    .first()
10286                    .as_ref()
10287                    .map(|location| {
10288                        let buffer = location.buffer.read(cx);
10289                        format!(
10290                            "References to `{}`",
10291                            buffer
10292                                .text_for_range(location.range.clone())
10293                                .collect::<String>()
10294                        )
10295                    })
10296                    .unwrap();
10297                Self::open_locations_in_multibuffer(workspace, locations, title, false, cx);
10298                Navigated::Yes
10299            })
10300        }))
10301    }
10302
10303    /// Opens a multibuffer with the given project locations in it
10304    pub fn open_locations_in_multibuffer(
10305        workspace: &mut Workspace,
10306        mut locations: Vec<Location>,
10307        title: String,
10308        split: bool,
10309        cx: &mut ViewContext<Workspace>,
10310    ) {
10311        // If there are multiple definitions, open them in a multibuffer
10312        locations.sort_by_key(|location| location.buffer.read(cx).remote_id());
10313        let mut locations = locations.into_iter().peekable();
10314        let mut ranges_to_highlight = Vec::new();
10315        let capability = workspace.project().read(cx).capability();
10316
10317        let excerpt_buffer = cx.new_model(|cx| {
10318            let mut multibuffer = MultiBuffer::new(capability);
10319            while let Some(location) = locations.next() {
10320                let buffer = location.buffer.read(cx);
10321                let mut ranges_for_buffer = Vec::new();
10322                let range = location.range.to_offset(buffer);
10323                ranges_for_buffer.push(range.clone());
10324
10325                while let Some(next_location) = locations.peek() {
10326                    if next_location.buffer == location.buffer {
10327                        ranges_for_buffer.push(next_location.range.to_offset(buffer));
10328                        locations.next();
10329                    } else {
10330                        break;
10331                    }
10332                }
10333
10334                ranges_for_buffer.sort_by_key(|range| (range.start, Reverse(range.end)));
10335                ranges_to_highlight.extend(multibuffer.push_excerpts_with_context_lines(
10336                    location.buffer.clone(),
10337                    ranges_for_buffer,
10338                    DEFAULT_MULTIBUFFER_CONTEXT,
10339                    cx,
10340                ))
10341            }
10342
10343            multibuffer.with_title(title)
10344        });
10345
10346        let editor = cx.new_view(|cx| {
10347            Editor::for_multibuffer(excerpt_buffer, Some(workspace.project().clone()), true, cx)
10348        });
10349        editor.update(cx, |editor, cx| {
10350            if let Some(first_range) = ranges_to_highlight.first() {
10351                editor.change_selections(None, cx, |selections| {
10352                    selections.clear_disjoint();
10353                    selections.select_anchor_ranges(std::iter::once(first_range.clone()));
10354                });
10355            }
10356            editor.highlight_background::<Self>(
10357                &ranges_to_highlight,
10358                |theme| theme.editor_highlighted_line_background,
10359                cx,
10360            );
10361        });
10362
10363        let item = Box::new(editor);
10364        let item_id = item.item_id();
10365
10366        if split {
10367            workspace.split_item(SplitDirection::Right, item.clone(), cx);
10368        } else {
10369            let destination_index = workspace.active_pane().update(cx, |pane, cx| {
10370                if PreviewTabsSettings::get_global(cx).enable_preview_from_code_navigation {
10371                    pane.close_current_preview_item(cx)
10372                } else {
10373                    None
10374                }
10375            });
10376            workspace.add_item_to_active_pane(item.clone(), destination_index, true, cx);
10377        }
10378        workspace.active_pane().update(cx, |pane, cx| {
10379            pane.set_preview_item_id(Some(item_id), cx);
10380        });
10381    }
10382
10383    pub fn rename(&mut self, _: &Rename, cx: &mut ViewContext<Self>) -> Option<Task<Result<()>>> {
10384        use language::ToOffset as _;
10385
10386        let provider = self.semantics_provider.clone()?;
10387        let selection = self.selections.newest_anchor().clone();
10388        let (cursor_buffer, cursor_buffer_position) = self
10389            .buffer
10390            .read(cx)
10391            .text_anchor_for_position(selection.head(), cx)?;
10392        let (tail_buffer, cursor_buffer_position_end) = self
10393            .buffer
10394            .read(cx)
10395            .text_anchor_for_position(selection.tail(), cx)?;
10396        if tail_buffer != cursor_buffer {
10397            return None;
10398        }
10399
10400        let snapshot = cursor_buffer.read(cx).snapshot();
10401        let cursor_buffer_offset = cursor_buffer_position.to_offset(&snapshot);
10402        let cursor_buffer_offset_end = cursor_buffer_position_end.to_offset(&snapshot);
10403        let prepare_rename = provider
10404            .range_for_rename(&cursor_buffer, cursor_buffer_position, cx)
10405            .unwrap_or_else(|| Task::ready(Ok(None)));
10406        drop(snapshot);
10407
10408        Some(cx.spawn(|this, mut cx| async move {
10409            let rename_range = if let Some(range) = prepare_rename.await? {
10410                Some(range)
10411            } else {
10412                this.update(&mut cx, |this, cx| {
10413                    let buffer = this.buffer.read(cx).snapshot(cx);
10414                    let mut buffer_highlights = this
10415                        .document_highlights_for_position(selection.head(), &buffer)
10416                        .filter(|highlight| {
10417                            highlight.start.excerpt_id == selection.head().excerpt_id
10418                                && highlight.end.excerpt_id == selection.head().excerpt_id
10419                        });
10420                    buffer_highlights
10421                        .next()
10422                        .map(|highlight| highlight.start.text_anchor..highlight.end.text_anchor)
10423                })?
10424            };
10425            if let Some(rename_range) = rename_range {
10426                this.update(&mut cx, |this, cx| {
10427                    let snapshot = cursor_buffer.read(cx).snapshot();
10428                    let rename_buffer_range = rename_range.to_offset(&snapshot);
10429                    let cursor_offset_in_rename_range =
10430                        cursor_buffer_offset.saturating_sub(rename_buffer_range.start);
10431                    let cursor_offset_in_rename_range_end =
10432                        cursor_buffer_offset_end.saturating_sub(rename_buffer_range.start);
10433
10434                    this.take_rename(false, cx);
10435                    let buffer = this.buffer.read(cx).read(cx);
10436                    let cursor_offset = selection.head().to_offset(&buffer);
10437                    let rename_start = cursor_offset.saturating_sub(cursor_offset_in_rename_range);
10438                    let rename_end = rename_start + rename_buffer_range.len();
10439                    let range = buffer.anchor_before(rename_start)..buffer.anchor_after(rename_end);
10440                    let mut old_highlight_id = None;
10441                    let old_name: Arc<str> = buffer
10442                        .chunks(rename_start..rename_end, true)
10443                        .map(|chunk| {
10444                            if old_highlight_id.is_none() {
10445                                old_highlight_id = chunk.syntax_highlight_id;
10446                            }
10447                            chunk.text
10448                        })
10449                        .collect::<String>()
10450                        .into();
10451
10452                    drop(buffer);
10453
10454                    // Position the selection in the rename editor so that it matches the current selection.
10455                    this.show_local_selections = false;
10456                    let rename_editor = cx.new_view(|cx| {
10457                        let mut editor = Editor::single_line(cx);
10458                        editor.buffer.update(cx, |buffer, cx| {
10459                            buffer.edit([(0..0, old_name.clone())], None, cx)
10460                        });
10461                        let rename_selection_range = match cursor_offset_in_rename_range
10462                            .cmp(&cursor_offset_in_rename_range_end)
10463                        {
10464                            Ordering::Equal => {
10465                                editor.select_all(&SelectAll, cx);
10466                                return editor;
10467                            }
10468                            Ordering::Less => {
10469                                cursor_offset_in_rename_range..cursor_offset_in_rename_range_end
10470                            }
10471                            Ordering::Greater => {
10472                                cursor_offset_in_rename_range_end..cursor_offset_in_rename_range
10473                            }
10474                        };
10475                        if rename_selection_range.end > old_name.len() {
10476                            editor.select_all(&SelectAll, cx);
10477                        } else {
10478                            editor.change_selections(Some(Autoscroll::fit()), cx, |s| {
10479                                s.select_ranges([rename_selection_range]);
10480                            });
10481                        }
10482                        editor
10483                    });
10484                    cx.subscribe(&rename_editor, |_, _, e: &EditorEvent, cx| {
10485                        if e == &EditorEvent::Focused {
10486                            cx.emit(EditorEvent::FocusedIn)
10487                        }
10488                    })
10489                    .detach();
10490
10491                    let write_highlights =
10492                        this.clear_background_highlights::<DocumentHighlightWrite>(cx);
10493                    let read_highlights =
10494                        this.clear_background_highlights::<DocumentHighlightRead>(cx);
10495                    let ranges = write_highlights
10496                        .iter()
10497                        .flat_map(|(_, ranges)| ranges.iter())
10498                        .chain(read_highlights.iter().flat_map(|(_, ranges)| ranges.iter()))
10499                        .cloned()
10500                        .collect();
10501
10502                    this.highlight_text::<Rename>(
10503                        ranges,
10504                        HighlightStyle {
10505                            fade_out: Some(0.6),
10506                            ..Default::default()
10507                        },
10508                        cx,
10509                    );
10510                    let rename_focus_handle = rename_editor.focus_handle(cx);
10511                    cx.focus(&rename_focus_handle);
10512                    let block_id = this.insert_blocks(
10513                        [BlockProperties {
10514                            style: BlockStyle::Flex,
10515                            placement: BlockPlacement::Below(range.start),
10516                            height: 1,
10517                            render: Arc::new({
10518                                let rename_editor = rename_editor.clone();
10519                                move |cx: &mut BlockContext| {
10520                                    let mut text_style = cx.editor_style.text.clone();
10521                                    if let Some(highlight_style) = old_highlight_id
10522                                        .and_then(|h| h.style(&cx.editor_style.syntax))
10523                                    {
10524                                        text_style = text_style.highlight(highlight_style);
10525                                    }
10526                                    div()
10527                                        .block_mouse_down()
10528                                        .pl(cx.anchor_x)
10529                                        .child(EditorElement::new(
10530                                            &rename_editor,
10531                                            EditorStyle {
10532                                                background: cx.theme().system().transparent,
10533                                                local_player: cx.editor_style.local_player,
10534                                                text: text_style,
10535                                                scrollbar_width: cx.editor_style.scrollbar_width,
10536                                                syntax: cx.editor_style.syntax.clone(),
10537                                                status: cx.editor_style.status.clone(),
10538                                                inlay_hints_style: HighlightStyle {
10539                                                    font_weight: Some(FontWeight::BOLD),
10540                                                    ..make_inlay_hints_style(cx)
10541                                                },
10542                                                suggestions_style: HighlightStyle {
10543                                                    color: Some(cx.theme().status().predictive),
10544                                                    ..HighlightStyle::default()
10545                                                },
10546                                                ..EditorStyle::default()
10547                                            },
10548                                        ))
10549                                        .into_any_element()
10550                                }
10551                            }),
10552                            priority: 0,
10553                        }],
10554                        Some(Autoscroll::fit()),
10555                        cx,
10556                    )[0];
10557                    this.pending_rename = Some(RenameState {
10558                        range,
10559                        old_name,
10560                        editor: rename_editor,
10561                        block_id,
10562                    });
10563                })?;
10564            }
10565
10566            Ok(())
10567        }))
10568    }
10569
10570    pub fn confirm_rename(
10571        &mut self,
10572        _: &ConfirmRename,
10573        cx: &mut ViewContext<Self>,
10574    ) -> Option<Task<Result<()>>> {
10575        let rename = self.take_rename(false, cx)?;
10576        let workspace = self.workspace()?.downgrade();
10577        let (buffer, start) = self
10578            .buffer
10579            .read(cx)
10580            .text_anchor_for_position(rename.range.start, cx)?;
10581        let (end_buffer, _) = self
10582            .buffer
10583            .read(cx)
10584            .text_anchor_for_position(rename.range.end, cx)?;
10585        if buffer != end_buffer {
10586            return None;
10587        }
10588
10589        let old_name = rename.old_name;
10590        let new_name = rename.editor.read(cx).text(cx);
10591
10592        let rename = self.semantics_provider.as_ref()?.perform_rename(
10593            &buffer,
10594            start,
10595            new_name.clone(),
10596            cx,
10597        )?;
10598
10599        Some(cx.spawn(|editor, mut cx| async move {
10600            let project_transaction = rename.await?;
10601            Self::open_project_transaction(
10602                &editor,
10603                workspace,
10604                project_transaction,
10605                format!("Rename: {} → {}", old_name, new_name),
10606                cx.clone(),
10607            )
10608            .await?;
10609
10610            editor.update(&mut cx, |editor, cx| {
10611                editor.refresh_document_highlights(cx);
10612            })?;
10613            Ok(())
10614        }))
10615    }
10616
10617    fn take_rename(
10618        &mut self,
10619        moving_cursor: bool,
10620        cx: &mut ViewContext<Self>,
10621    ) -> Option<RenameState> {
10622        let rename = self.pending_rename.take()?;
10623        if rename.editor.focus_handle(cx).is_focused(cx) {
10624            cx.focus(&self.focus_handle);
10625        }
10626
10627        self.remove_blocks(
10628            [rename.block_id].into_iter().collect(),
10629            Some(Autoscroll::fit()),
10630            cx,
10631        );
10632        self.clear_highlights::<Rename>(cx);
10633        self.show_local_selections = true;
10634
10635        if moving_cursor {
10636            let cursor_in_rename_editor = rename.editor.update(cx, |editor, cx| {
10637                editor.selections.newest::<usize>(cx).head()
10638            });
10639
10640            // Update the selection to match the position of the selection inside
10641            // the rename editor.
10642            let snapshot = self.buffer.read(cx).read(cx);
10643            let rename_range = rename.range.to_offset(&snapshot);
10644            let cursor_in_editor = snapshot
10645                .clip_offset(rename_range.start + cursor_in_rename_editor, Bias::Left)
10646                .min(rename_range.end);
10647            drop(snapshot);
10648
10649            self.change_selections(None, cx, |s| {
10650                s.select_ranges(vec![cursor_in_editor..cursor_in_editor])
10651            });
10652        } else {
10653            self.refresh_document_highlights(cx);
10654        }
10655
10656        Some(rename)
10657    }
10658
10659    pub fn pending_rename(&self) -> Option<&RenameState> {
10660        self.pending_rename.as_ref()
10661    }
10662
10663    fn format(&mut self, _: &Format, cx: &mut ViewContext<Self>) -> Option<Task<Result<()>>> {
10664        let project = match &self.project {
10665            Some(project) => project.clone(),
10666            None => return None,
10667        };
10668
10669        Some(self.perform_format(project, FormatTrigger::Manual, FormatTarget::Buffer, cx))
10670    }
10671
10672    fn format_selections(
10673        &mut self,
10674        _: &FormatSelections,
10675        cx: &mut ViewContext<Self>,
10676    ) -> Option<Task<Result<()>>> {
10677        let project = match &self.project {
10678            Some(project) => project.clone(),
10679            None => return None,
10680        };
10681
10682        let selections = self
10683            .selections
10684            .all_adjusted(cx)
10685            .into_iter()
10686            .filter(|s| !s.is_empty())
10687            .collect_vec();
10688
10689        Some(self.perform_format(
10690            project,
10691            FormatTrigger::Manual,
10692            FormatTarget::Ranges(selections),
10693            cx,
10694        ))
10695    }
10696
10697    fn perform_format(
10698        &mut self,
10699        project: Model<Project>,
10700        trigger: FormatTrigger,
10701        target: FormatTarget,
10702        cx: &mut ViewContext<Self>,
10703    ) -> Task<Result<()>> {
10704        let buffer = self.buffer().clone();
10705        let mut buffers = buffer.read(cx).all_buffers();
10706        if trigger == FormatTrigger::Save {
10707            buffers.retain(|buffer| buffer.read(cx).is_dirty());
10708        }
10709
10710        let mut timeout = cx.background_executor().timer(FORMAT_TIMEOUT).fuse();
10711        let format = project.update(cx, |project, cx| {
10712            project.format(buffers, true, trigger, target, cx)
10713        });
10714
10715        cx.spawn(|_, mut cx| async move {
10716            let transaction = futures::select_biased! {
10717                () = timeout => {
10718                    log::warn!("timed out waiting for formatting");
10719                    None
10720                }
10721                transaction = format.log_err().fuse() => transaction,
10722            };
10723
10724            buffer
10725                .update(&mut cx, |buffer, cx| {
10726                    if let Some(transaction) = transaction {
10727                        if !buffer.is_singleton() {
10728                            buffer.push_transaction(&transaction.0, cx);
10729                        }
10730                    }
10731
10732                    cx.notify();
10733                })
10734                .ok();
10735
10736            Ok(())
10737        })
10738    }
10739
10740    fn restart_language_server(&mut self, _: &RestartLanguageServer, cx: &mut ViewContext<Self>) {
10741        if let Some(project) = self.project.clone() {
10742            self.buffer.update(cx, |multi_buffer, cx| {
10743                project.update(cx, |project, cx| {
10744                    project.restart_language_servers_for_buffers(multi_buffer.all_buffers(), cx);
10745                });
10746            })
10747        }
10748    }
10749
10750    fn cancel_language_server_work(
10751        &mut self,
10752        _: &actions::CancelLanguageServerWork,
10753        cx: &mut ViewContext<Self>,
10754    ) {
10755        if let Some(project) = self.project.clone() {
10756            self.buffer.update(cx, |multi_buffer, cx| {
10757                project.update(cx, |project, cx| {
10758                    project.cancel_language_server_work_for_buffers(multi_buffer.all_buffers(), cx);
10759                });
10760            })
10761        }
10762    }
10763
10764    fn show_character_palette(&mut self, _: &ShowCharacterPalette, cx: &mut ViewContext<Self>) {
10765        cx.show_character_palette();
10766    }
10767
10768    fn refresh_active_diagnostics(&mut self, cx: &mut ViewContext<Editor>) {
10769        if let Some(active_diagnostics) = self.active_diagnostics.as_mut() {
10770            let buffer = self.buffer.read(cx).snapshot(cx);
10771            let primary_range_start = active_diagnostics.primary_range.start.to_offset(&buffer);
10772            let is_valid = buffer
10773                .diagnostics_in_range::<_, usize>(active_diagnostics.primary_range.clone(), false)
10774                .any(|entry| {
10775                    entry.diagnostic.is_primary
10776                        && !entry.range.is_empty()
10777                        && entry.range.start == primary_range_start
10778                        && entry.diagnostic.message == active_diagnostics.primary_message
10779                });
10780
10781            if is_valid != active_diagnostics.is_valid {
10782                active_diagnostics.is_valid = is_valid;
10783                let mut new_styles = HashMap::default();
10784                for (block_id, diagnostic) in &active_diagnostics.blocks {
10785                    new_styles.insert(
10786                        *block_id,
10787                        diagnostic_block_renderer(diagnostic.clone(), None, true, is_valid),
10788                    );
10789                }
10790                self.display_map.update(cx, |display_map, _cx| {
10791                    display_map.replace_blocks(new_styles)
10792                });
10793            }
10794        }
10795    }
10796
10797    fn activate_diagnostics(&mut self, group_id: usize, cx: &mut ViewContext<Self>) -> bool {
10798        self.dismiss_diagnostics(cx);
10799        let snapshot = self.snapshot(cx);
10800        self.active_diagnostics = self.display_map.update(cx, |display_map, cx| {
10801            let buffer = self.buffer.read(cx).snapshot(cx);
10802
10803            let mut primary_range = None;
10804            let mut primary_message = None;
10805            let mut group_end = Point::zero();
10806            let diagnostic_group = buffer
10807                .diagnostic_group::<MultiBufferPoint>(group_id)
10808                .filter_map(|entry| {
10809                    if snapshot.is_line_folded(MultiBufferRow(entry.range.start.row))
10810                        && (entry.range.start.row == entry.range.end.row
10811                            || snapshot.is_line_folded(MultiBufferRow(entry.range.end.row)))
10812                    {
10813                        return None;
10814                    }
10815                    if entry.range.end > group_end {
10816                        group_end = entry.range.end;
10817                    }
10818                    if entry.diagnostic.is_primary {
10819                        primary_range = Some(entry.range.clone());
10820                        primary_message = Some(entry.diagnostic.message.clone());
10821                    }
10822                    Some(entry)
10823                })
10824                .collect::<Vec<_>>();
10825            let primary_range = primary_range?;
10826            let primary_message = primary_message?;
10827            let primary_range =
10828                buffer.anchor_after(primary_range.start)..buffer.anchor_before(primary_range.end);
10829
10830            let blocks = display_map
10831                .insert_blocks(
10832                    diagnostic_group.iter().map(|entry| {
10833                        let diagnostic = entry.diagnostic.clone();
10834                        let message_height = diagnostic.message.matches('\n').count() as u32 + 1;
10835                        BlockProperties {
10836                            style: BlockStyle::Fixed,
10837                            placement: BlockPlacement::Below(
10838                                buffer.anchor_after(entry.range.start),
10839                            ),
10840                            height: message_height,
10841                            render: diagnostic_block_renderer(diagnostic, None, true, true),
10842                            priority: 0,
10843                        }
10844                    }),
10845                    cx,
10846                )
10847                .into_iter()
10848                .zip(diagnostic_group.into_iter().map(|entry| entry.diagnostic))
10849                .collect();
10850
10851            Some(ActiveDiagnosticGroup {
10852                primary_range,
10853                primary_message,
10854                group_id,
10855                blocks,
10856                is_valid: true,
10857            })
10858        });
10859        self.active_diagnostics.is_some()
10860    }
10861
10862    fn dismiss_diagnostics(&mut self, cx: &mut ViewContext<Self>) {
10863        if let Some(active_diagnostic_group) = self.active_diagnostics.take() {
10864            self.display_map.update(cx, |display_map, cx| {
10865                display_map.remove_blocks(active_diagnostic_group.blocks.into_keys().collect(), cx);
10866            });
10867            cx.notify();
10868        }
10869    }
10870
10871    pub fn set_selections_from_remote(
10872        &mut self,
10873        selections: Vec<Selection<Anchor>>,
10874        pending_selection: Option<Selection<Anchor>>,
10875        cx: &mut ViewContext<Self>,
10876    ) {
10877        let old_cursor_position = self.selections.newest_anchor().head();
10878        self.selections.change_with(cx, |s| {
10879            s.select_anchors(selections);
10880            if let Some(pending_selection) = pending_selection {
10881                s.set_pending(pending_selection, SelectMode::Character);
10882            } else {
10883                s.clear_pending();
10884            }
10885        });
10886        self.selections_did_change(false, &old_cursor_position, true, cx);
10887    }
10888
10889    fn push_to_selection_history(&mut self) {
10890        self.selection_history.push(SelectionHistoryEntry {
10891            selections: self.selections.disjoint_anchors(),
10892            select_next_state: self.select_next_state.clone(),
10893            select_prev_state: self.select_prev_state.clone(),
10894            add_selections_state: self.add_selections_state.clone(),
10895        });
10896    }
10897
10898    pub fn transact(
10899        &mut self,
10900        cx: &mut ViewContext<Self>,
10901        update: impl FnOnce(&mut Self, &mut ViewContext<Self>),
10902    ) -> Option<TransactionId> {
10903        self.start_transaction_at(Instant::now(), cx);
10904        update(self, cx);
10905        self.end_transaction_at(Instant::now(), cx)
10906    }
10907
10908    fn start_transaction_at(&mut self, now: Instant, cx: &mut ViewContext<Self>) {
10909        self.end_selection(cx);
10910        if let Some(tx_id) = self
10911            .buffer
10912            .update(cx, |buffer, cx| buffer.start_transaction_at(now, cx))
10913        {
10914            self.selection_history
10915                .insert_transaction(tx_id, self.selections.disjoint_anchors());
10916            cx.emit(EditorEvent::TransactionBegun {
10917                transaction_id: tx_id,
10918            })
10919        }
10920    }
10921
10922    fn end_transaction_at(
10923        &mut self,
10924        now: Instant,
10925        cx: &mut ViewContext<Self>,
10926    ) -> Option<TransactionId> {
10927        if let Some(transaction_id) = self
10928            .buffer
10929            .update(cx, |buffer, cx| buffer.end_transaction_at(now, cx))
10930        {
10931            if let Some((_, end_selections)) =
10932                self.selection_history.transaction_mut(transaction_id)
10933            {
10934                *end_selections = Some(self.selections.disjoint_anchors());
10935            } else {
10936                log::error!("unexpectedly ended a transaction that wasn't started by this editor");
10937            }
10938
10939            cx.emit(EditorEvent::Edited { transaction_id });
10940            Some(transaction_id)
10941        } else {
10942            None
10943        }
10944    }
10945
10946    pub fn toggle_fold(&mut self, _: &actions::ToggleFold, cx: &mut ViewContext<Self>) {
10947        let selection = self.selections.newest::<Point>(cx);
10948
10949        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10950        let range = if selection.is_empty() {
10951            let point = selection.head().to_display_point(&display_map);
10952            let start = DisplayPoint::new(point.row(), 0).to_point(&display_map);
10953            let end = DisplayPoint::new(point.row(), display_map.line_len(point.row()))
10954                .to_point(&display_map);
10955            start..end
10956        } else {
10957            selection.range()
10958        };
10959        if display_map.folds_in_range(range).next().is_some() {
10960            self.unfold_lines(&Default::default(), cx)
10961        } else {
10962            self.fold(&Default::default(), cx)
10963        }
10964    }
10965
10966    pub fn toggle_fold_recursive(
10967        &mut self,
10968        _: &actions::ToggleFoldRecursive,
10969        cx: &mut ViewContext<Self>,
10970    ) {
10971        let selection = self.selections.newest::<Point>(cx);
10972
10973        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10974        let range = if selection.is_empty() {
10975            let point = selection.head().to_display_point(&display_map);
10976            let start = DisplayPoint::new(point.row(), 0).to_point(&display_map);
10977            let end = DisplayPoint::new(point.row(), display_map.line_len(point.row()))
10978                .to_point(&display_map);
10979            start..end
10980        } else {
10981            selection.range()
10982        };
10983        if display_map.folds_in_range(range).next().is_some() {
10984            self.unfold_recursive(&Default::default(), cx)
10985        } else {
10986            self.fold_recursive(&Default::default(), cx)
10987        }
10988    }
10989
10990    pub fn fold(&mut self, _: &actions::Fold, cx: &mut ViewContext<Self>) {
10991        let mut to_fold = Vec::new();
10992        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
10993        let selections = self.selections.all_adjusted(cx);
10994
10995        for selection in selections {
10996            let range = selection.range().sorted();
10997            let buffer_start_row = range.start.row;
10998
10999            if range.start.row != range.end.row {
11000                let mut found = false;
11001                let mut row = range.start.row;
11002                while row <= range.end.row {
11003                    if let Some(crease) = display_map.crease_for_buffer_row(MultiBufferRow(row)) {
11004                        found = true;
11005                        row = crease.range().end.row + 1;
11006                        to_fold.push(crease);
11007                    } else {
11008                        row += 1
11009                    }
11010                }
11011                if found {
11012                    continue;
11013                }
11014            }
11015
11016            for row in (0..=range.start.row).rev() {
11017                if let Some(crease) = display_map.crease_for_buffer_row(MultiBufferRow(row)) {
11018                    if crease.range().end.row >= buffer_start_row {
11019                        to_fold.push(crease);
11020                        if row <= range.start.row {
11021                            break;
11022                        }
11023                    }
11024                }
11025            }
11026        }
11027
11028        self.fold_creases(to_fold, true, cx);
11029    }
11030
11031    fn fold_at_level(&mut self, fold_at: &FoldAtLevel, cx: &mut ViewContext<Self>) {
11032        let fold_at_level = fold_at.level;
11033        let snapshot = self.buffer.read(cx).snapshot(cx);
11034        let mut to_fold = Vec::new();
11035        let mut stack = vec![(0, snapshot.max_buffer_row().0, 1)];
11036
11037        while let Some((mut start_row, end_row, current_level)) = stack.pop() {
11038            while start_row < end_row {
11039                match self
11040                    .snapshot(cx)
11041                    .crease_for_buffer_row(MultiBufferRow(start_row))
11042                {
11043                    Some(crease) => {
11044                        let nested_start_row = crease.range().start.row + 1;
11045                        let nested_end_row = crease.range().end.row;
11046
11047                        if current_level < fold_at_level {
11048                            stack.push((nested_start_row, nested_end_row, current_level + 1));
11049                        } else if current_level == fold_at_level {
11050                            to_fold.push(crease);
11051                        }
11052
11053                        start_row = nested_end_row + 1;
11054                    }
11055                    None => start_row += 1,
11056                }
11057            }
11058        }
11059
11060        self.fold_creases(to_fold, true, cx);
11061    }
11062
11063    pub fn fold_all(&mut self, _: &actions::FoldAll, cx: &mut ViewContext<Self>) {
11064        let mut fold_ranges = Vec::new();
11065        let snapshot = self.buffer.read(cx).snapshot(cx);
11066
11067        for row in 0..snapshot.max_buffer_row().0 {
11068            if let Some(foldable_range) =
11069                self.snapshot(cx).crease_for_buffer_row(MultiBufferRow(row))
11070            {
11071                fold_ranges.push(foldable_range);
11072            }
11073        }
11074
11075        self.fold_creases(fold_ranges, true, cx);
11076    }
11077
11078    pub fn fold_recursive(&mut self, _: &actions::FoldRecursive, cx: &mut ViewContext<Self>) {
11079        let mut to_fold = Vec::new();
11080        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
11081        let selections = self.selections.all_adjusted(cx);
11082
11083        for selection in selections {
11084            let range = selection.range().sorted();
11085            let buffer_start_row = range.start.row;
11086
11087            if range.start.row != range.end.row {
11088                let mut found = false;
11089                for row in range.start.row..=range.end.row {
11090                    if let Some(crease) = display_map.crease_for_buffer_row(MultiBufferRow(row)) {
11091                        found = true;
11092                        to_fold.push(crease);
11093                    }
11094                }
11095                if found {
11096                    continue;
11097                }
11098            }
11099
11100            for row in (0..=range.start.row).rev() {
11101                if let Some(crease) = display_map.crease_for_buffer_row(MultiBufferRow(row)) {
11102                    if crease.range().end.row >= buffer_start_row {
11103                        to_fold.push(crease);
11104                    } else {
11105                        break;
11106                    }
11107                }
11108            }
11109        }
11110
11111        self.fold_creases(to_fold, true, cx);
11112    }
11113
11114    pub fn fold_at(&mut self, fold_at: &FoldAt, cx: &mut ViewContext<Self>) {
11115        let buffer_row = fold_at.buffer_row;
11116        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
11117
11118        if let Some(crease) = display_map.crease_for_buffer_row(buffer_row) {
11119            let autoscroll = self
11120                .selections
11121                .all::<Point>(cx)
11122                .iter()
11123                .any(|selection| crease.range().overlaps(&selection.range()));
11124
11125            self.fold_creases(vec![crease], autoscroll, cx);
11126        }
11127    }
11128
11129    pub fn unfold_lines(&mut self, _: &UnfoldLines, cx: &mut ViewContext<Self>) {
11130        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
11131        let buffer = &display_map.buffer_snapshot;
11132        let selections = self.selections.all::<Point>(cx);
11133        let ranges = selections
11134            .iter()
11135            .map(|s| {
11136                let range = s.display_range(&display_map).sorted();
11137                let mut start = range.start.to_point(&display_map);
11138                let mut end = range.end.to_point(&display_map);
11139                start.column = 0;
11140                end.column = buffer.line_len(MultiBufferRow(end.row));
11141                start..end
11142            })
11143            .collect::<Vec<_>>();
11144
11145        self.unfold_ranges(&ranges, true, true, cx);
11146    }
11147
11148    pub fn unfold_recursive(&mut self, _: &UnfoldRecursive, cx: &mut ViewContext<Self>) {
11149        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
11150        let selections = self.selections.all::<Point>(cx);
11151        let ranges = selections
11152            .iter()
11153            .map(|s| {
11154                let mut range = s.display_range(&display_map).sorted();
11155                *range.start.column_mut() = 0;
11156                *range.end.column_mut() = display_map.line_len(range.end.row());
11157                let start = range.start.to_point(&display_map);
11158                let end = range.end.to_point(&display_map);
11159                start..end
11160            })
11161            .collect::<Vec<_>>();
11162
11163        self.unfold_ranges(&ranges, true, true, cx);
11164    }
11165
11166    pub fn unfold_at(&mut self, unfold_at: &UnfoldAt, cx: &mut ViewContext<Self>) {
11167        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
11168
11169        let intersection_range = Point::new(unfold_at.buffer_row.0, 0)
11170            ..Point::new(
11171                unfold_at.buffer_row.0,
11172                display_map.buffer_snapshot.line_len(unfold_at.buffer_row),
11173            );
11174
11175        let autoscroll = self
11176            .selections
11177            .all::<Point>(cx)
11178            .iter()
11179            .any(|selection| RangeExt::overlaps(&selection.range(), &intersection_range));
11180
11181        self.unfold_ranges(&[intersection_range], true, autoscroll, cx)
11182    }
11183
11184    pub fn unfold_all(&mut self, _: &actions::UnfoldAll, cx: &mut ViewContext<Self>) {
11185        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
11186        self.unfold_ranges(&[0..display_map.buffer_snapshot.len()], true, true, cx);
11187    }
11188
11189    pub fn fold_selected_ranges(&mut self, _: &FoldSelectedRanges, cx: &mut ViewContext<Self>) {
11190        let selections = self.selections.all::<Point>(cx);
11191        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
11192        let line_mode = self.selections.line_mode;
11193        let ranges = selections
11194            .into_iter()
11195            .map(|s| {
11196                if line_mode {
11197                    let start = Point::new(s.start.row, 0);
11198                    let end = Point::new(
11199                        s.end.row,
11200                        display_map
11201                            .buffer_snapshot
11202                            .line_len(MultiBufferRow(s.end.row)),
11203                    );
11204                    Crease::simple(start..end, display_map.fold_placeholder.clone())
11205                } else {
11206                    Crease::simple(s.start..s.end, display_map.fold_placeholder.clone())
11207                }
11208            })
11209            .collect::<Vec<_>>();
11210        self.fold_creases(ranges, true, cx);
11211    }
11212
11213    pub fn fold_creases<T: ToOffset + Clone>(
11214        &mut self,
11215        creases: Vec<Crease<T>>,
11216        auto_scroll: bool,
11217        cx: &mut ViewContext<Self>,
11218    ) {
11219        if creases.is_empty() {
11220            return;
11221        }
11222
11223        let mut buffers_affected = HashMap::default();
11224        let multi_buffer = self.buffer().read(cx);
11225        for crease in &creases {
11226            if let Some((_, buffer, _)) =
11227                multi_buffer.excerpt_containing(crease.range().start.clone(), cx)
11228            {
11229                buffers_affected.insert(buffer.read(cx).remote_id(), buffer);
11230            };
11231        }
11232
11233        self.display_map.update(cx, |map, cx| map.fold(creases, cx));
11234
11235        if auto_scroll {
11236            self.request_autoscroll(Autoscroll::fit(), cx);
11237        }
11238
11239        for buffer in buffers_affected.into_values() {
11240            self.sync_expanded_diff_hunks(buffer, cx);
11241        }
11242
11243        cx.notify();
11244
11245        if let Some(active_diagnostics) = self.active_diagnostics.take() {
11246            // Clear diagnostics block when folding a range that contains it.
11247            let snapshot = self.snapshot(cx);
11248            if snapshot.intersects_fold(active_diagnostics.primary_range.start) {
11249                drop(snapshot);
11250                self.active_diagnostics = Some(active_diagnostics);
11251                self.dismiss_diagnostics(cx);
11252            } else {
11253                self.active_diagnostics = Some(active_diagnostics);
11254            }
11255        }
11256
11257        self.scrollbar_marker_state.dirty = true;
11258    }
11259
11260    /// Removes any folds whose ranges intersect any of the given ranges.
11261    pub fn unfold_ranges<T: ToOffset + Clone>(
11262        &mut self,
11263        ranges: &[Range<T>],
11264        inclusive: bool,
11265        auto_scroll: bool,
11266        cx: &mut ViewContext<Self>,
11267    ) {
11268        self.remove_folds_with(ranges, auto_scroll, cx, |map, cx| {
11269            map.unfold_intersecting(ranges.iter().cloned(), inclusive, cx)
11270        });
11271    }
11272
11273    /// Removes any folds with the given ranges.
11274    pub fn remove_folds_with_type<T: ToOffset + Clone>(
11275        &mut self,
11276        ranges: &[Range<T>],
11277        type_id: TypeId,
11278        auto_scroll: bool,
11279        cx: &mut ViewContext<Self>,
11280    ) {
11281        self.remove_folds_with(ranges, auto_scroll, cx, |map, cx| {
11282            map.remove_folds_with_type(ranges.iter().cloned(), type_id, cx)
11283        });
11284    }
11285
11286    fn remove_folds_with<T: ToOffset + Clone>(
11287        &mut self,
11288        ranges: &[Range<T>],
11289        auto_scroll: bool,
11290        cx: &mut ViewContext<Self>,
11291        update: impl FnOnce(&mut DisplayMap, &mut ModelContext<DisplayMap>),
11292    ) {
11293        if ranges.is_empty() {
11294            return;
11295        }
11296
11297        let mut buffers_affected = HashMap::default();
11298        let multi_buffer = self.buffer().read(cx);
11299        for range in ranges {
11300            if let Some((_, buffer, _)) = multi_buffer.excerpt_containing(range.start.clone(), cx) {
11301                buffers_affected.insert(buffer.read(cx).remote_id(), buffer);
11302            };
11303        }
11304
11305        self.display_map.update(cx, update);
11306
11307        if auto_scroll {
11308            self.request_autoscroll(Autoscroll::fit(), cx);
11309        }
11310
11311        for buffer in buffers_affected.into_values() {
11312            self.sync_expanded_diff_hunks(buffer, cx);
11313        }
11314
11315        cx.notify();
11316        self.scrollbar_marker_state.dirty = true;
11317        self.active_indent_guides_state.dirty = true;
11318    }
11319
11320    pub fn default_fold_placeholder(&self, cx: &AppContext) -> FoldPlaceholder {
11321        self.display_map.read(cx).fold_placeholder.clone()
11322    }
11323
11324    pub fn set_gutter_hovered(&mut self, hovered: bool, cx: &mut ViewContext<Self>) {
11325        if hovered != self.gutter_hovered {
11326            self.gutter_hovered = hovered;
11327            cx.notify();
11328        }
11329    }
11330
11331    pub fn insert_blocks(
11332        &mut self,
11333        blocks: impl IntoIterator<Item = BlockProperties<Anchor>>,
11334        autoscroll: Option<Autoscroll>,
11335        cx: &mut ViewContext<Self>,
11336    ) -> Vec<CustomBlockId> {
11337        let blocks = self
11338            .display_map
11339            .update(cx, |display_map, cx| display_map.insert_blocks(blocks, cx));
11340        if let Some(autoscroll) = autoscroll {
11341            self.request_autoscroll(autoscroll, cx);
11342        }
11343        cx.notify();
11344        blocks
11345    }
11346
11347    pub fn resize_blocks(
11348        &mut self,
11349        heights: HashMap<CustomBlockId, u32>,
11350        autoscroll: Option<Autoscroll>,
11351        cx: &mut ViewContext<Self>,
11352    ) {
11353        self.display_map
11354            .update(cx, |display_map, cx| display_map.resize_blocks(heights, cx));
11355        if let Some(autoscroll) = autoscroll {
11356            self.request_autoscroll(autoscroll, cx);
11357        }
11358        cx.notify();
11359    }
11360
11361    pub fn replace_blocks(
11362        &mut self,
11363        renderers: HashMap<CustomBlockId, RenderBlock>,
11364        autoscroll: Option<Autoscroll>,
11365        cx: &mut ViewContext<Self>,
11366    ) {
11367        self.display_map
11368            .update(cx, |display_map, _cx| display_map.replace_blocks(renderers));
11369        if let Some(autoscroll) = autoscroll {
11370            self.request_autoscroll(autoscroll, cx);
11371        }
11372        cx.notify();
11373    }
11374
11375    pub fn remove_blocks(
11376        &mut self,
11377        block_ids: HashSet<CustomBlockId>,
11378        autoscroll: Option<Autoscroll>,
11379        cx: &mut ViewContext<Self>,
11380    ) {
11381        self.display_map.update(cx, |display_map, cx| {
11382            display_map.remove_blocks(block_ids, cx)
11383        });
11384        if let Some(autoscroll) = autoscroll {
11385            self.request_autoscroll(autoscroll, cx);
11386        }
11387        cx.notify();
11388    }
11389
11390    pub fn row_for_block(
11391        &self,
11392        block_id: CustomBlockId,
11393        cx: &mut ViewContext<Self>,
11394    ) -> Option<DisplayRow> {
11395        self.display_map
11396            .update(cx, |map, cx| map.row_for_block(block_id, cx))
11397    }
11398
11399    pub(crate) fn set_focused_block(&mut self, focused_block: FocusedBlock) {
11400        self.focused_block = Some(focused_block);
11401    }
11402
11403    pub(crate) fn take_focused_block(&mut self) -> Option<FocusedBlock> {
11404        self.focused_block.take()
11405    }
11406
11407    pub fn insert_creases(
11408        &mut self,
11409        creases: impl IntoIterator<Item = Crease<Anchor>>,
11410        cx: &mut ViewContext<Self>,
11411    ) -> Vec<CreaseId> {
11412        self.display_map
11413            .update(cx, |map, cx| map.insert_creases(creases, cx))
11414    }
11415
11416    pub fn remove_creases(
11417        &mut self,
11418        ids: impl IntoIterator<Item = CreaseId>,
11419        cx: &mut ViewContext<Self>,
11420    ) {
11421        self.display_map
11422            .update(cx, |map, cx| map.remove_creases(ids, cx));
11423    }
11424
11425    pub fn longest_row(&self, cx: &mut AppContext) -> DisplayRow {
11426        self.display_map
11427            .update(cx, |map, cx| map.snapshot(cx))
11428            .longest_row()
11429    }
11430
11431    pub fn max_point(&self, cx: &mut AppContext) -> DisplayPoint {
11432        self.display_map
11433            .update(cx, |map, cx| map.snapshot(cx))
11434            .max_point()
11435    }
11436
11437    pub fn text(&self, cx: &AppContext) -> String {
11438        self.buffer.read(cx).read(cx).text()
11439    }
11440
11441    pub fn text_option(&self, cx: &AppContext) -> Option<String> {
11442        let text = self.text(cx);
11443        let text = text.trim();
11444
11445        if text.is_empty() {
11446            return None;
11447        }
11448
11449        Some(text.to_string())
11450    }
11451
11452    pub fn set_text(&mut self, text: impl Into<Arc<str>>, cx: &mut ViewContext<Self>) {
11453        self.transact(cx, |this, cx| {
11454            this.buffer
11455                .read(cx)
11456                .as_singleton()
11457                .expect("you can only call set_text on editors for singleton buffers")
11458                .update(cx, |buffer, cx| buffer.set_text(text, cx));
11459        });
11460    }
11461
11462    pub fn display_text(&self, cx: &mut AppContext) -> String {
11463        self.display_map
11464            .update(cx, |map, cx| map.snapshot(cx))
11465            .text()
11466    }
11467
11468    pub fn wrap_guides(&self, cx: &AppContext) -> SmallVec<[(usize, bool); 2]> {
11469        let mut wrap_guides = smallvec::smallvec![];
11470
11471        if self.show_wrap_guides == Some(false) {
11472            return wrap_guides;
11473        }
11474
11475        let settings = self.buffer.read(cx).settings_at(0, cx);
11476        if settings.show_wrap_guides {
11477            if let SoftWrap::Column(soft_wrap) = self.soft_wrap_mode(cx) {
11478                wrap_guides.push((soft_wrap as usize, true));
11479            } else if let SoftWrap::Bounded(soft_wrap) = self.soft_wrap_mode(cx) {
11480                wrap_guides.push((soft_wrap as usize, true));
11481            }
11482            wrap_guides.extend(settings.wrap_guides.iter().map(|guide| (*guide, false)))
11483        }
11484
11485        wrap_guides
11486    }
11487
11488    pub fn soft_wrap_mode(&self, cx: &AppContext) -> SoftWrap {
11489        let settings = self.buffer.read(cx).settings_at(0, cx);
11490        let mode = self.soft_wrap_mode_override.unwrap_or(settings.soft_wrap);
11491        match mode {
11492            language_settings::SoftWrap::PreferLine | language_settings::SoftWrap::None => {
11493                SoftWrap::None
11494            }
11495            language_settings::SoftWrap::EditorWidth => SoftWrap::EditorWidth,
11496            language_settings::SoftWrap::PreferredLineLength => {
11497                SoftWrap::Column(settings.preferred_line_length)
11498            }
11499            language_settings::SoftWrap::Bounded => {
11500                SoftWrap::Bounded(settings.preferred_line_length)
11501            }
11502        }
11503    }
11504
11505    pub fn set_soft_wrap_mode(
11506        &mut self,
11507        mode: language_settings::SoftWrap,
11508        cx: &mut ViewContext<Self>,
11509    ) {
11510        self.soft_wrap_mode_override = Some(mode);
11511        cx.notify();
11512    }
11513
11514    pub fn set_text_style_refinement(&mut self, style: TextStyleRefinement) {
11515        self.text_style_refinement = Some(style);
11516    }
11517
11518    /// called by the Element so we know what style we were most recently rendered with.
11519    pub(crate) fn set_style(&mut self, style: EditorStyle, cx: &mut ViewContext<Self>) {
11520        let rem_size = cx.rem_size();
11521        self.display_map.update(cx, |map, cx| {
11522            map.set_font(
11523                style.text.font(),
11524                style.text.font_size.to_pixels(rem_size),
11525                cx,
11526            )
11527        });
11528        self.style = Some(style);
11529    }
11530
11531    pub fn style(&self) -> Option<&EditorStyle> {
11532        self.style.as_ref()
11533    }
11534
11535    // Called by the element. This method is not designed to be called outside of the editor
11536    // element's layout code because it does not notify when rewrapping is computed synchronously.
11537    pub(crate) fn set_wrap_width(&self, width: Option<Pixels>, cx: &mut AppContext) -> bool {
11538        self.display_map
11539            .update(cx, |map, cx| map.set_wrap_width(width, cx))
11540    }
11541
11542    pub fn toggle_soft_wrap(&mut self, _: &ToggleSoftWrap, cx: &mut ViewContext<Self>) {
11543        if self.soft_wrap_mode_override.is_some() {
11544            self.soft_wrap_mode_override.take();
11545        } else {
11546            let soft_wrap = match self.soft_wrap_mode(cx) {
11547                SoftWrap::GitDiff => return,
11548                SoftWrap::None => language_settings::SoftWrap::EditorWidth,
11549                SoftWrap::EditorWidth | SoftWrap::Column(_) | SoftWrap::Bounded(_) => {
11550                    language_settings::SoftWrap::None
11551                }
11552            };
11553            self.soft_wrap_mode_override = Some(soft_wrap);
11554        }
11555        cx.notify();
11556    }
11557
11558    pub fn toggle_tab_bar(&mut self, _: &ToggleTabBar, cx: &mut ViewContext<Self>) {
11559        let Some(workspace) = self.workspace() else {
11560            return;
11561        };
11562        let fs = workspace.read(cx).app_state().fs.clone();
11563        let current_show = TabBarSettings::get_global(cx).show;
11564        update_settings_file::<TabBarSettings>(fs, cx, move |setting, _| {
11565            setting.show = Some(!current_show);
11566        });
11567    }
11568
11569    pub fn toggle_indent_guides(&mut self, _: &ToggleIndentGuides, cx: &mut ViewContext<Self>) {
11570        let currently_enabled = self.should_show_indent_guides().unwrap_or_else(|| {
11571            self.buffer
11572                .read(cx)
11573                .settings_at(0, cx)
11574                .indent_guides
11575                .enabled
11576        });
11577        self.show_indent_guides = Some(!currently_enabled);
11578        cx.notify();
11579    }
11580
11581    fn should_show_indent_guides(&self) -> Option<bool> {
11582        self.show_indent_guides
11583    }
11584
11585    pub fn toggle_line_numbers(&mut self, _: &ToggleLineNumbers, cx: &mut ViewContext<Self>) {
11586        let mut editor_settings = EditorSettings::get_global(cx).clone();
11587        editor_settings.gutter.line_numbers = !editor_settings.gutter.line_numbers;
11588        EditorSettings::override_global(editor_settings, cx);
11589    }
11590
11591    pub fn should_use_relative_line_numbers(&self, cx: &WindowContext) -> bool {
11592        self.use_relative_line_numbers
11593            .unwrap_or(EditorSettings::get_global(cx).relative_line_numbers)
11594    }
11595
11596    pub fn toggle_relative_line_numbers(
11597        &mut self,
11598        _: &ToggleRelativeLineNumbers,
11599        cx: &mut ViewContext<Self>,
11600    ) {
11601        let is_relative = self.should_use_relative_line_numbers(cx);
11602        self.set_relative_line_number(Some(!is_relative), cx)
11603    }
11604
11605    pub fn set_relative_line_number(
11606        &mut self,
11607        is_relative: Option<bool>,
11608        cx: &mut ViewContext<Self>,
11609    ) {
11610        self.use_relative_line_numbers = is_relative;
11611        cx.notify();
11612    }
11613
11614    pub fn set_show_gutter(&mut self, show_gutter: bool, cx: &mut ViewContext<Self>) {
11615        self.show_gutter = show_gutter;
11616        cx.notify();
11617    }
11618
11619    pub fn set_show_line_numbers(&mut self, show_line_numbers: bool, cx: &mut ViewContext<Self>) {
11620        self.show_line_numbers = Some(show_line_numbers);
11621        cx.notify();
11622    }
11623
11624    pub fn set_show_git_diff_gutter(
11625        &mut self,
11626        show_git_diff_gutter: bool,
11627        cx: &mut ViewContext<Self>,
11628    ) {
11629        self.show_git_diff_gutter = Some(show_git_diff_gutter);
11630        cx.notify();
11631    }
11632
11633    pub fn set_show_code_actions(&mut self, show_code_actions: bool, cx: &mut ViewContext<Self>) {
11634        self.show_code_actions = Some(show_code_actions);
11635        cx.notify();
11636    }
11637
11638    pub fn set_show_runnables(&mut self, show_runnables: bool, cx: &mut ViewContext<Self>) {
11639        self.show_runnables = Some(show_runnables);
11640        cx.notify();
11641    }
11642
11643    pub fn set_masked(&mut self, masked: bool, cx: &mut ViewContext<Self>) {
11644        if self.display_map.read(cx).masked != masked {
11645            self.display_map.update(cx, |map, _| map.masked = masked);
11646        }
11647        cx.notify()
11648    }
11649
11650    pub fn set_show_wrap_guides(&mut self, show_wrap_guides: bool, cx: &mut ViewContext<Self>) {
11651        self.show_wrap_guides = Some(show_wrap_guides);
11652        cx.notify();
11653    }
11654
11655    pub fn set_show_indent_guides(&mut self, show_indent_guides: bool, cx: &mut ViewContext<Self>) {
11656        self.show_indent_guides = Some(show_indent_guides);
11657        cx.notify();
11658    }
11659
11660    pub fn working_directory(&self, cx: &WindowContext) -> Option<PathBuf> {
11661        if let Some(buffer) = self.buffer().read(cx).as_singleton() {
11662            if let Some(file) = buffer.read(cx).file().and_then(|f| f.as_local()) {
11663                if let Some(dir) = file.abs_path(cx).parent() {
11664                    return Some(dir.to_owned());
11665                }
11666            }
11667
11668            if let Some(project_path) = buffer.read(cx).project_path(cx) {
11669                return Some(project_path.path.to_path_buf());
11670            }
11671        }
11672
11673        None
11674    }
11675
11676    fn target_file<'a>(&self, cx: &'a AppContext) -> Option<&'a dyn language::LocalFile> {
11677        self.active_excerpt(cx)?
11678            .1
11679            .read(cx)
11680            .file()
11681            .and_then(|f| f.as_local())
11682    }
11683
11684    pub fn reveal_in_finder(&mut self, _: &RevealInFileManager, cx: &mut ViewContext<Self>) {
11685        if let Some(target) = self.target_file(cx) {
11686            cx.reveal_path(&target.abs_path(cx));
11687        }
11688    }
11689
11690    pub fn copy_path(&mut self, _: &CopyPath, cx: &mut ViewContext<Self>) {
11691        if let Some(file) = self.target_file(cx) {
11692            if let Some(path) = file.abs_path(cx).to_str() {
11693                cx.write_to_clipboard(ClipboardItem::new_string(path.to_string()));
11694            }
11695        }
11696    }
11697
11698    pub fn copy_relative_path(&mut self, _: &CopyRelativePath, cx: &mut ViewContext<Self>) {
11699        if let Some(file) = self.target_file(cx) {
11700            if let Some(path) = file.path().to_str() {
11701                cx.write_to_clipboard(ClipboardItem::new_string(path.to_string()));
11702            }
11703        }
11704    }
11705
11706    pub fn toggle_git_blame(&mut self, _: &ToggleGitBlame, cx: &mut ViewContext<Self>) {
11707        self.show_git_blame_gutter = !self.show_git_blame_gutter;
11708
11709        if self.show_git_blame_gutter && !self.has_blame_entries(cx) {
11710            self.start_git_blame(true, cx);
11711        }
11712
11713        cx.notify();
11714    }
11715
11716    pub fn toggle_git_blame_inline(
11717        &mut self,
11718        _: &ToggleGitBlameInline,
11719        cx: &mut ViewContext<Self>,
11720    ) {
11721        self.toggle_git_blame_inline_internal(true, cx);
11722        cx.notify();
11723    }
11724
11725    pub fn git_blame_inline_enabled(&self) -> bool {
11726        self.git_blame_inline_enabled
11727    }
11728
11729    pub fn toggle_selection_menu(&mut self, _: &ToggleSelectionMenu, cx: &mut ViewContext<Self>) {
11730        self.show_selection_menu = self
11731            .show_selection_menu
11732            .map(|show_selections_menu| !show_selections_menu)
11733            .or_else(|| Some(!EditorSettings::get_global(cx).toolbar.selections_menu));
11734
11735        cx.notify();
11736    }
11737
11738    pub fn selection_menu_enabled(&self, cx: &AppContext) -> bool {
11739        self.show_selection_menu
11740            .unwrap_or_else(|| EditorSettings::get_global(cx).toolbar.selections_menu)
11741    }
11742
11743    fn start_git_blame(&mut self, user_triggered: bool, cx: &mut ViewContext<Self>) {
11744        if let Some(project) = self.project.as_ref() {
11745            let Some(buffer) = self.buffer().read(cx).as_singleton() else {
11746                return;
11747            };
11748
11749            if buffer.read(cx).file().is_none() {
11750                return;
11751            }
11752
11753            let focused = self.focus_handle(cx).contains_focused(cx);
11754
11755            let project = project.clone();
11756            let blame =
11757                cx.new_model(|cx| GitBlame::new(buffer, project, user_triggered, focused, cx));
11758            self.blame_subscription = Some(cx.observe(&blame, |_, _, cx| cx.notify()));
11759            self.blame = Some(blame);
11760        }
11761    }
11762
11763    fn toggle_git_blame_inline_internal(
11764        &mut self,
11765        user_triggered: bool,
11766        cx: &mut ViewContext<Self>,
11767    ) {
11768        if self.git_blame_inline_enabled {
11769            self.git_blame_inline_enabled = false;
11770            self.show_git_blame_inline = false;
11771            self.show_git_blame_inline_delay_task.take();
11772        } else {
11773            self.git_blame_inline_enabled = true;
11774            self.start_git_blame_inline(user_triggered, cx);
11775        }
11776
11777        cx.notify();
11778    }
11779
11780    fn start_git_blame_inline(&mut self, user_triggered: bool, cx: &mut ViewContext<Self>) {
11781        self.start_git_blame(user_triggered, cx);
11782
11783        if ProjectSettings::get_global(cx)
11784            .git
11785            .inline_blame_delay()
11786            .is_some()
11787        {
11788            self.start_inline_blame_timer(cx);
11789        } else {
11790            self.show_git_blame_inline = true
11791        }
11792    }
11793
11794    pub fn blame(&self) -> Option<&Model<GitBlame>> {
11795        self.blame.as_ref()
11796    }
11797
11798    pub fn render_git_blame_gutter(&mut self, cx: &mut WindowContext) -> bool {
11799        self.show_git_blame_gutter && self.has_blame_entries(cx)
11800    }
11801
11802    pub fn render_git_blame_inline(&mut self, cx: &mut WindowContext) -> bool {
11803        self.show_git_blame_inline
11804            && self.focus_handle.is_focused(cx)
11805            && !self.newest_selection_head_on_empty_line(cx)
11806            && self.has_blame_entries(cx)
11807    }
11808
11809    fn has_blame_entries(&self, cx: &mut WindowContext) -> bool {
11810        self.blame()
11811            .map_or(false, |blame| blame.read(cx).has_generated_entries())
11812    }
11813
11814    fn newest_selection_head_on_empty_line(&mut self, cx: &mut WindowContext) -> bool {
11815        let cursor_anchor = self.selections.newest_anchor().head();
11816
11817        let snapshot = self.buffer.read(cx).snapshot(cx);
11818        let buffer_row = MultiBufferRow(cursor_anchor.to_point(&snapshot).row);
11819
11820        snapshot.line_len(buffer_row) == 0
11821    }
11822
11823    fn get_permalink_to_line(&mut self, cx: &mut ViewContext<Self>) -> Task<Result<url::Url>> {
11824        let buffer_and_selection = maybe!({
11825            let selection = self.selections.newest::<Point>(cx);
11826            let selection_range = selection.range();
11827
11828            let (buffer, selection) = if let Some(buffer) = self.buffer().read(cx).as_singleton() {
11829                (buffer, selection_range.start.row..selection_range.end.row)
11830            } else {
11831                let buffer_ranges = self
11832                    .buffer()
11833                    .read(cx)
11834                    .range_to_buffer_ranges(selection_range, cx);
11835
11836                let (buffer, range, _) = if selection.reversed {
11837                    buffer_ranges.first()
11838                } else {
11839                    buffer_ranges.last()
11840                }?;
11841
11842                let snapshot = buffer.read(cx).snapshot();
11843                let selection = text::ToPoint::to_point(&range.start, &snapshot).row
11844                    ..text::ToPoint::to_point(&range.end, &snapshot).row;
11845                (buffer.clone(), selection)
11846            };
11847
11848            Some((buffer, selection))
11849        });
11850
11851        let Some((buffer, selection)) = buffer_and_selection else {
11852            return Task::ready(Err(anyhow!("failed to determine buffer and selection")));
11853        };
11854
11855        let Some(project) = self.project.as_ref() else {
11856            return Task::ready(Err(anyhow!("editor does not have project")));
11857        };
11858
11859        project.update(cx, |project, cx| {
11860            project.get_permalink_to_line(&buffer, selection, cx)
11861        })
11862    }
11863
11864    pub fn copy_permalink_to_line(&mut self, _: &CopyPermalinkToLine, cx: &mut ViewContext<Self>) {
11865        let permalink_task = self.get_permalink_to_line(cx);
11866        let workspace = self.workspace();
11867
11868        cx.spawn(|_, mut cx| async move {
11869            match permalink_task.await {
11870                Ok(permalink) => {
11871                    cx.update(|cx| {
11872                        cx.write_to_clipboard(ClipboardItem::new_string(permalink.to_string()));
11873                    })
11874                    .ok();
11875                }
11876                Err(err) => {
11877                    let message = format!("Failed to copy permalink: {err}");
11878
11879                    Err::<(), anyhow::Error>(err).log_err();
11880
11881                    if let Some(workspace) = workspace {
11882                        workspace
11883                            .update(&mut cx, |workspace, cx| {
11884                                struct CopyPermalinkToLine;
11885
11886                                workspace.show_toast(
11887                                    Toast::new(
11888                                        NotificationId::unique::<CopyPermalinkToLine>(),
11889                                        message,
11890                                    ),
11891                                    cx,
11892                                )
11893                            })
11894                            .ok();
11895                    }
11896                }
11897            }
11898        })
11899        .detach();
11900    }
11901
11902    pub fn copy_file_location(&mut self, _: &CopyFileLocation, cx: &mut ViewContext<Self>) {
11903        let selection = self.selections.newest::<Point>(cx).start.row + 1;
11904        if let Some(file) = self.target_file(cx) {
11905            if let Some(path) = file.path().to_str() {
11906                cx.write_to_clipboard(ClipboardItem::new_string(format!("{path}:{selection}")));
11907            }
11908        }
11909    }
11910
11911    pub fn open_permalink_to_line(&mut self, _: &OpenPermalinkToLine, cx: &mut ViewContext<Self>) {
11912        let permalink_task = self.get_permalink_to_line(cx);
11913        let workspace = self.workspace();
11914
11915        cx.spawn(|_, mut cx| async move {
11916            match permalink_task.await {
11917                Ok(permalink) => {
11918                    cx.update(|cx| {
11919                        cx.open_url(permalink.as_ref());
11920                    })
11921                    .ok();
11922                }
11923                Err(err) => {
11924                    let message = format!("Failed to open permalink: {err}");
11925
11926                    Err::<(), anyhow::Error>(err).log_err();
11927
11928                    if let Some(workspace) = workspace {
11929                        workspace
11930                            .update(&mut cx, |workspace, cx| {
11931                                struct OpenPermalinkToLine;
11932
11933                                workspace.show_toast(
11934                                    Toast::new(
11935                                        NotificationId::unique::<OpenPermalinkToLine>(),
11936                                        message,
11937                                    ),
11938                                    cx,
11939                                )
11940                            })
11941                            .ok();
11942                    }
11943                }
11944            }
11945        })
11946        .detach();
11947    }
11948
11949    /// Adds a row highlight for the given range. If a row has multiple highlights, the
11950    /// last highlight added will be used.
11951    ///
11952    /// If the range ends at the beginning of a line, then that line will not be highlighted.
11953    pub fn highlight_rows<T: 'static>(
11954        &mut self,
11955        range: Range<Anchor>,
11956        color: Hsla,
11957        should_autoscroll: bool,
11958        cx: &mut ViewContext<Self>,
11959    ) {
11960        let snapshot = self.buffer().read(cx).snapshot(cx);
11961        let row_highlights = self.highlighted_rows.entry(TypeId::of::<T>()).or_default();
11962        let ix = row_highlights.binary_search_by(|highlight| {
11963            Ordering::Equal
11964                .then_with(|| highlight.range.start.cmp(&range.start, &snapshot))
11965                .then_with(|| highlight.range.end.cmp(&range.end, &snapshot))
11966        });
11967
11968        if let Err(mut ix) = ix {
11969            let index = post_inc(&mut self.highlight_order);
11970
11971            // If this range intersects with the preceding highlight, then merge it with
11972            // the preceding highlight. Otherwise insert a new highlight.
11973            let mut merged = false;
11974            if ix > 0 {
11975                let prev_highlight = &mut row_highlights[ix - 1];
11976                if prev_highlight
11977                    .range
11978                    .end
11979                    .cmp(&range.start, &snapshot)
11980                    .is_ge()
11981                {
11982                    ix -= 1;
11983                    if prev_highlight.range.end.cmp(&range.end, &snapshot).is_lt() {
11984                        prev_highlight.range.end = range.end;
11985                    }
11986                    merged = true;
11987                    prev_highlight.index = index;
11988                    prev_highlight.color = color;
11989                    prev_highlight.should_autoscroll = should_autoscroll;
11990                }
11991            }
11992
11993            if !merged {
11994                row_highlights.insert(
11995                    ix,
11996                    RowHighlight {
11997                        range: range.clone(),
11998                        index,
11999                        color,
12000                        should_autoscroll,
12001                    },
12002                );
12003            }
12004
12005            // If any of the following highlights intersect with this one, merge them.
12006            while let Some(next_highlight) = row_highlights.get(ix + 1) {
12007                let highlight = &row_highlights[ix];
12008                if next_highlight
12009                    .range
12010                    .start
12011                    .cmp(&highlight.range.end, &snapshot)
12012                    .is_le()
12013                {
12014                    if next_highlight
12015                        .range
12016                        .end
12017                        .cmp(&highlight.range.end, &snapshot)
12018                        .is_gt()
12019                    {
12020                        row_highlights[ix].range.end = next_highlight.range.end;
12021                    }
12022                    row_highlights.remove(ix + 1);
12023                } else {
12024                    break;
12025                }
12026            }
12027        }
12028    }
12029
12030    /// Remove any highlighted row ranges of the given type that intersect the
12031    /// given ranges.
12032    pub fn remove_highlighted_rows<T: 'static>(
12033        &mut self,
12034        ranges_to_remove: Vec<Range<Anchor>>,
12035        cx: &mut ViewContext<Self>,
12036    ) {
12037        let snapshot = self.buffer().read(cx).snapshot(cx);
12038        let row_highlights = self.highlighted_rows.entry(TypeId::of::<T>()).or_default();
12039        let mut ranges_to_remove = ranges_to_remove.iter().peekable();
12040        row_highlights.retain(|highlight| {
12041            while let Some(range_to_remove) = ranges_to_remove.peek() {
12042                match range_to_remove.end.cmp(&highlight.range.start, &snapshot) {
12043                    Ordering::Less | Ordering::Equal => {
12044                        ranges_to_remove.next();
12045                    }
12046                    Ordering::Greater => {
12047                        match range_to_remove.start.cmp(&highlight.range.end, &snapshot) {
12048                            Ordering::Less | Ordering::Equal => {
12049                                return false;
12050                            }
12051                            Ordering::Greater => break,
12052                        }
12053                    }
12054                }
12055            }
12056
12057            true
12058        })
12059    }
12060
12061    /// Clear all anchor ranges for a certain highlight context type, so no corresponding rows will be highlighted.
12062    pub fn clear_row_highlights<T: 'static>(&mut self) {
12063        self.highlighted_rows.remove(&TypeId::of::<T>());
12064    }
12065
12066    /// For a highlight given context type, gets all anchor ranges that will be used for row highlighting.
12067    pub fn highlighted_rows<T: 'static>(&self) -> impl '_ + Iterator<Item = (Range<Anchor>, Hsla)> {
12068        self.highlighted_rows
12069            .get(&TypeId::of::<T>())
12070            .map_or(&[] as &[_], |vec| vec.as_slice())
12071            .iter()
12072            .map(|highlight| (highlight.range.clone(), highlight.color))
12073    }
12074
12075    /// Merges all anchor ranges for all context types ever set, picking the last highlight added in case of a row conflict.
12076    /// Rerturns a map of display rows that are highlighted and their corresponding highlight color.
12077    /// Allows to ignore certain kinds of highlights.
12078    pub fn highlighted_display_rows(
12079        &mut self,
12080        cx: &mut WindowContext,
12081    ) -> BTreeMap<DisplayRow, Hsla> {
12082        let snapshot = self.snapshot(cx);
12083        let mut used_highlight_orders = HashMap::default();
12084        self.highlighted_rows
12085            .iter()
12086            .flat_map(|(_, highlighted_rows)| highlighted_rows.iter())
12087            .fold(
12088                BTreeMap::<DisplayRow, Hsla>::new(),
12089                |mut unique_rows, highlight| {
12090                    let start = highlight.range.start.to_display_point(&snapshot);
12091                    let end = highlight.range.end.to_display_point(&snapshot);
12092                    let start_row = start.row().0;
12093                    let end_row = if highlight.range.end.text_anchor != text::Anchor::MAX
12094                        && end.column() == 0
12095                    {
12096                        end.row().0.saturating_sub(1)
12097                    } else {
12098                        end.row().0
12099                    };
12100                    for row in start_row..=end_row {
12101                        let used_index =
12102                            used_highlight_orders.entry(row).or_insert(highlight.index);
12103                        if highlight.index >= *used_index {
12104                            *used_index = highlight.index;
12105                            unique_rows.insert(DisplayRow(row), highlight.color);
12106                        }
12107                    }
12108                    unique_rows
12109                },
12110            )
12111    }
12112
12113    pub fn highlighted_display_row_for_autoscroll(
12114        &self,
12115        snapshot: &DisplaySnapshot,
12116    ) -> Option<DisplayRow> {
12117        self.highlighted_rows
12118            .values()
12119            .flat_map(|highlighted_rows| highlighted_rows.iter())
12120            .filter_map(|highlight| {
12121                if highlight.should_autoscroll {
12122                    Some(highlight.range.start.to_display_point(snapshot).row())
12123                } else {
12124                    None
12125                }
12126            })
12127            .min()
12128    }
12129
12130    pub fn set_search_within_ranges(
12131        &mut self,
12132        ranges: &[Range<Anchor>],
12133        cx: &mut ViewContext<Self>,
12134    ) {
12135        self.highlight_background::<SearchWithinRange>(
12136            ranges,
12137            |colors| colors.editor_document_highlight_read_background,
12138            cx,
12139        )
12140    }
12141
12142    pub fn set_breadcrumb_header(&mut self, new_header: String) {
12143        self.breadcrumb_header = Some(new_header);
12144    }
12145
12146    pub fn clear_search_within_ranges(&mut self, cx: &mut ViewContext<Self>) {
12147        self.clear_background_highlights::<SearchWithinRange>(cx);
12148    }
12149
12150    pub fn highlight_background<T: 'static>(
12151        &mut self,
12152        ranges: &[Range<Anchor>],
12153        color_fetcher: fn(&ThemeColors) -> Hsla,
12154        cx: &mut ViewContext<Self>,
12155    ) {
12156        self.background_highlights
12157            .insert(TypeId::of::<T>(), (color_fetcher, Arc::from(ranges)));
12158        self.scrollbar_marker_state.dirty = true;
12159        cx.notify();
12160    }
12161
12162    pub fn clear_background_highlights<T: 'static>(
12163        &mut self,
12164        cx: &mut ViewContext<Self>,
12165    ) -> Option<BackgroundHighlight> {
12166        let text_highlights = self.background_highlights.remove(&TypeId::of::<T>())?;
12167        if !text_highlights.1.is_empty() {
12168            self.scrollbar_marker_state.dirty = true;
12169            cx.notify();
12170        }
12171        Some(text_highlights)
12172    }
12173
12174    pub fn highlight_gutter<T: 'static>(
12175        &mut self,
12176        ranges: &[Range<Anchor>],
12177        color_fetcher: fn(&AppContext) -> Hsla,
12178        cx: &mut ViewContext<Self>,
12179    ) {
12180        self.gutter_highlights
12181            .insert(TypeId::of::<T>(), (color_fetcher, Arc::from(ranges)));
12182        cx.notify();
12183    }
12184
12185    pub fn clear_gutter_highlights<T: 'static>(
12186        &mut self,
12187        cx: &mut ViewContext<Self>,
12188    ) -> Option<GutterHighlight> {
12189        cx.notify();
12190        self.gutter_highlights.remove(&TypeId::of::<T>())
12191    }
12192
12193    #[cfg(feature = "test-support")]
12194    pub fn all_text_background_highlights(
12195        &mut self,
12196        cx: &mut ViewContext<Self>,
12197    ) -> Vec<(Range<DisplayPoint>, Hsla)> {
12198        let snapshot = self.snapshot(cx);
12199        let buffer = &snapshot.buffer_snapshot;
12200        let start = buffer.anchor_before(0);
12201        let end = buffer.anchor_after(buffer.len());
12202        let theme = cx.theme().colors();
12203        self.background_highlights_in_range(start..end, &snapshot, theme)
12204    }
12205
12206    #[cfg(feature = "test-support")]
12207    pub fn search_background_highlights(
12208        &mut self,
12209        cx: &mut ViewContext<Self>,
12210    ) -> Vec<Range<Point>> {
12211        let snapshot = self.buffer().read(cx).snapshot(cx);
12212
12213        let highlights = self
12214            .background_highlights
12215            .get(&TypeId::of::<items::BufferSearchHighlights>());
12216
12217        if let Some((_color, ranges)) = highlights {
12218            ranges
12219                .iter()
12220                .map(|range| range.start.to_point(&snapshot)..range.end.to_point(&snapshot))
12221                .collect_vec()
12222        } else {
12223            vec![]
12224        }
12225    }
12226
12227    fn document_highlights_for_position<'a>(
12228        &'a self,
12229        position: Anchor,
12230        buffer: &'a MultiBufferSnapshot,
12231    ) -> impl 'a + Iterator<Item = &'a Range<Anchor>> {
12232        let read_highlights = self
12233            .background_highlights
12234            .get(&TypeId::of::<DocumentHighlightRead>())
12235            .map(|h| &h.1);
12236        let write_highlights = self
12237            .background_highlights
12238            .get(&TypeId::of::<DocumentHighlightWrite>())
12239            .map(|h| &h.1);
12240        let left_position = position.bias_left(buffer);
12241        let right_position = position.bias_right(buffer);
12242        read_highlights
12243            .into_iter()
12244            .chain(write_highlights)
12245            .flat_map(move |ranges| {
12246                let start_ix = match ranges.binary_search_by(|probe| {
12247                    let cmp = probe.end.cmp(&left_position, buffer);
12248                    if cmp.is_ge() {
12249                        Ordering::Greater
12250                    } else {
12251                        Ordering::Less
12252                    }
12253                }) {
12254                    Ok(i) | Err(i) => i,
12255                };
12256
12257                ranges[start_ix..]
12258                    .iter()
12259                    .take_while(move |range| range.start.cmp(&right_position, buffer).is_le())
12260            })
12261    }
12262
12263    pub fn has_background_highlights<T: 'static>(&self) -> bool {
12264        self.background_highlights
12265            .get(&TypeId::of::<T>())
12266            .map_or(false, |(_, highlights)| !highlights.is_empty())
12267    }
12268
12269    pub fn background_highlights_in_range(
12270        &self,
12271        search_range: Range<Anchor>,
12272        display_snapshot: &DisplaySnapshot,
12273        theme: &ThemeColors,
12274    ) -> Vec<(Range<DisplayPoint>, Hsla)> {
12275        let mut results = Vec::new();
12276        for (color_fetcher, ranges) in self.background_highlights.values() {
12277            let color = color_fetcher(theme);
12278            let start_ix = match ranges.binary_search_by(|probe| {
12279                let cmp = probe
12280                    .end
12281                    .cmp(&search_range.start, &display_snapshot.buffer_snapshot);
12282                if cmp.is_gt() {
12283                    Ordering::Greater
12284                } else {
12285                    Ordering::Less
12286                }
12287            }) {
12288                Ok(i) | Err(i) => i,
12289            };
12290            for range in &ranges[start_ix..] {
12291                if range
12292                    .start
12293                    .cmp(&search_range.end, &display_snapshot.buffer_snapshot)
12294                    .is_ge()
12295                {
12296                    break;
12297                }
12298
12299                let start = range.start.to_display_point(display_snapshot);
12300                let end = range.end.to_display_point(display_snapshot);
12301                results.push((start..end, color))
12302            }
12303        }
12304        results
12305    }
12306
12307    pub fn background_highlight_row_ranges<T: 'static>(
12308        &self,
12309        search_range: Range<Anchor>,
12310        display_snapshot: &DisplaySnapshot,
12311        count: usize,
12312    ) -> Vec<RangeInclusive<DisplayPoint>> {
12313        let mut results = Vec::new();
12314        let Some((_, ranges)) = self.background_highlights.get(&TypeId::of::<T>()) else {
12315            return vec![];
12316        };
12317
12318        let start_ix = match ranges.binary_search_by(|probe| {
12319            let cmp = probe
12320                .end
12321                .cmp(&search_range.start, &display_snapshot.buffer_snapshot);
12322            if cmp.is_gt() {
12323                Ordering::Greater
12324            } else {
12325                Ordering::Less
12326            }
12327        }) {
12328            Ok(i) | Err(i) => i,
12329        };
12330        let mut push_region = |start: Option<Point>, end: Option<Point>| {
12331            if let (Some(start_display), Some(end_display)) = (start, end) {
12332                results.push(
12333                    start_display.to_display_point(display_snapshot)
12334                        ..=end_display.to_display_point(display_snapshot),
12335                );
12336            }
12337        };
12338        let mut start_row: Option<Point> = None;
12339        let mut end_row: Option<Point> = None;
12340        if ranges.len() > count {
12341            return Vec::new();
12342        }
12343        for range in &ranges[start_ix..] {
12344            if range
12345                .start
12346                .cmp(&search_range.end, &display_snapshot.buffer_snapshot)
12347                .is_ge()
12348            {
12349                break;
12350            }
12351            let end = range.end.to_point(&display_snapshot.buffer_snapshot);
12352            if let Some(current_row) = &end_row {
12353                if end.row == current_row.row {
12354                    continue;
12355                }
12356            }
12357            let start = range.start.to_point(&display_snapshot.buffer_snapshot);
12358            if start_row.is_none() {
12359                assert_eq!(end_row, None);
12360                start_row = Some(start);
12361                end_row = Some(end);
12362                continue;
12363            }
12364            if let Some(current_end) = end_row.as_mut() {
12365                if start.row > current_end.row + 1 {
12366                    push_region(start_row, end_row);
12367                    start_row = Some(start);
12368                    end_row = Some(end);
12369                } else {
12370                    // Merge two hunks.
12371                    *current_end = end;
12372                }
12373            } else {
12374                unreachable!();
12375            }
12376        }
12377        // We might still have a hunk that was not rendered (if there was a search hit on the last line)
12378        push_region(start_row, end_row);
12379        results
12380    }
12381
12382    pub fn gutter_highlights_in_range(
12383        &self,
12384        search_range: Range<Anchor>,
12385        display_snapshot: &DisplaySnapshot,
12386        cx: &AppContext,
12387    ) -> Vec<(Range<DisplayPoint>, Hsla)> {
12388        let mut results = Vec::new();
12389        for (color_fetcher, ranges) in self.gutter_highlights.values() {
12390            let color = color_fetcher(cx);
12391            let start_ix = match ranges.binary_search_by(|probe| {
12392                let cmp = probe
12393                    .end
12394                    .cmp(&search_range.start, &display_snapshot.buffer_snapshot);
12395                if cmp.is_gt() {
12396                    Ordering::Greater
12397                } else {
12398                    Ordering::Less
12399                }
12400            }) {
12401                Ok(i) | Err(i) => i,
12402            };
12403            for range in &ranges[start_ix..] {
12404                if range
12405                    .start
12406                    .cmp(&search_range.end, &display_snapshot.buffer_snapshot)
12407                    .is_ge()
12408                {
12409                    break;
12410                }
12411
12412                let start = range.start.to_display_point(display_snapshot);
12413                let end = range.end.to_display_point(display_snapshot);
12414                results.push((start..end, color))
12415            }
12416        }
12417        results
12418    }
12419
12420    /// Get the text ranges corresponding to the redaction query
12421    pub fn redacted_ranges(
12422        &self,
12423        search_range: Range<Anchor>,
12424        display_snapshot: &DisplaySnapshot,
12425        cx: &WindowContext,
12426    ) -> Vec<Range<DisplayPoint>> {
12427        display_snapshot
12428            .buffer_snapshot
12429            .redacted_ranges(search_range, |file| {
12430                if let Some(file) = file {
12431                    file.is_private()
12432                        && EditorSettings::get(
12433                            Some(SettingsLocation {
12434                                worktree_id: file.worktree_id(cx),
12435                                path: file.path().as_ref(),
12436                            }),
12437                            cx,
12438                        )
12439                        .redact_private_values
12440                } else {
12441                    false
12442                }
12443            })
12444            .map(|range| {
12445                range.start.to_display_point(display_snapshot)
12446                    ..range.end.to_display_point(display_snapshot)
12447            })
12448            .collect()
12449    }
12450
12451    pub fn highlight_text<T: 'static>(
12452        &mut self,
12453        ranges: Vec<Range<Anchor>>,
12454        style: HighlightStyle,
12455        cx: &mut ViewContext<Self>,
12456    ) {
12457        self.display_map.update(cx, |map, _| {
12458            map.highlight_text(TypeId::of::<T>(), ranges, style)
12459        });
12460        cx.notify();
12461    }
12462
12463    pub(crate) fn highlight_inlays<T: 'static>(
12464        &mut self,
12465        highlights: Vec<InlayHighlight>,
12466        style: HighlightStyle,
12467        cx: &mut ViewContext<Self>,
12468    ) {
12469        self.display_map.update(cx, |map, _| {
12470            map.highlight_inlays(TypeId::of::<T>(), highlights, style)
12471        });
12472        cx.notify();
12473    }
12474
12475    pub fn text_highlights<'a, T: 'static>(
12476        &'a self,
12477        cx: &'a AppContext,
12478    ) -> Option<(HighlightStyle, &'a [Range<Anchor>])> {
12479        self.display_map.read(cx).text_highlights(TypeId::of::<T>())
12480    }
12481
12482    pub fn clear_highlights<T: 'static>(&mut self, cx: &mut ViewContext<Self>) {
12483        let cleared = self
12484            .display_map
12485            .update(cx, |map, _| map.clear_highlights(TypeId::of::<T>()));
12486        if cleared {
12487            cx.notify();
12488        }
12489    }
12490
12491    pub fn show_local_cursors(&self, cx: &WindowContext) -> bool {
12492        (self.read_only(cx) || self.blink_manager.read(cx).visible())
12493            && self.focus_handle.is_focused(cx)
12494    }
12495
12496    pub fn set_show_cursor_when_unfocused(&mut self, is_enabled: bool, cx: &mut ViewContext<Self>) {
12497        self.show_cursor_when_unfocused = is_enabled;
12498        cx.notify();
12499    }
12500
12501    fn on_buffer_changed(&mut self, _: Model<MultiBuffer>, cx: &mut ViewContext<Self>) {
12502        cx.notify();
12503    }
12504
12505    fn on_buffer_event(
12506        &mut self,
12507        multibuffer: Model<MultiBuffer>,
12508        event: &multi_buffer::Event,
12509        cx: &mut ViewContext<Self>,
12510    ) {
12511        match event {
12512            multi_buffer::Event::Edited {
12513                singleton_buffer_edited,
12514            } => {
12515                self.scrollbar_marker_state.dirty = true;
12516                self.active_indent_guides_state.dirty = true;
12517                self.refresh_active_diagnostics(cx);
12518                self.refresh_code_actions(cx);
12519                if self.has_active_inline_completion(cx) {
12520                    self.update_visible_inline_completion(cx);
12521                }
12522                cx.emit(EditorEvent::BufferEdited);
12523                cx.emit(SearchEvent::MatchesInvalidated);
12524                if *singleton_buffer_edited {
12525                    if let Some(project) = &self.project {
12526                        let project = project.read(cx);
12527                        #[allow(clippy::mutable_key_type)]
12528                        let languages_affected = multibuffer
12529                            .read(cx)
12530                            .all_buffers()
12531                            .into_iter()
12532                            .filter_map(|buffer| {
12533                                let buffer = buffer.read(cx);
12534                                let language = buffer.language()?;
12535                                if project.is_local()
12536                                    && project.language_servers_for_buffer(buffer, cx).count() == 0
12537                                {
12538                                    None
12539                                } else {
12540                                    Some(language)
12541                                }
12542                            })
12543                            .cloned()
12544                            .collect::<HashSet<_>>();
12545                        if !languages_affected.is_empty() {
12546                            self.refresh_inlay_hints(
12547                                InlayHintRefreshReason::BufferEdited(languages_affected),
12548                                cx,
12549                            );
12550                        }
12551                    }
12552                }
12553
12554                let Some(project) = &self.project else { return };
12555                let (telemetry, is_via_ssh) = {
12556                    let project = project.read(cx);
12557                    let telemetry = project.client().telemetry().clone();
12558                    let is_via_ssh = project.is_via_ssh();
12559                    (telemetry, is_via_ssh)
12560                };
12561                refresh_linked_ranges(self, cx);
12562                telemetry.log_edit_event("editor", is_via_ssh);
12563            }
12564            multi_buffer::Event::ExcerptsAdded {
12565                buffer,
12566                predecessor,
12567                excerpts,
12568            } => {
12569                self.tasks_update_task = Some(self.refresh_runnables(cx));
12570                cx.emit(EditorEvent::ExcerptsAdded {
12571                    buffer: buffer.clone(),
12572                    predecessor: *predecessor,
12573                    excerpts: excerpts.clone(),
12574                });
12575                self.refresh_inlay_hints(InlayHintRefreshReason::NewLinesShown, cx);
12576            }
12577            multi_buffer::Event::ExcerptsRemoved { ids } => {
12578                self.refresh_inlay_hints(InlayHintRefreshReason::ExcerptsRemoved(ids.clone()), cx);
12579                cx.emit(EditorEvent::ExcerptsRemoved { ids: ids.clone() })
12580            }
12581            multi_buffer::Event::ExcerptsEdited { ids } => {
12582                cx.emit(EditorEvent::ExcerptsEdited { ids: ids.clone() })
12583            }
12584            multi_buffer::Event::ExcerptsExpanded { ids } => {
12585                cx.emit(EditorEvent::ExcerptsExpanded { ids: ids.clone() })
12586            }
12587            multi_buffer::Event::Reparsed(buffer_id) => {
12588                self.tasks_update_task = Some(self.refresh_runnables(cx));
12589
12590                cx.emit(EditorEvent::Reparsed(*buffer_id));
12591            }
12592            multi_buffer::Event::LanguageChanged(buffer_id) => {
12593                linked_editing_ranges::refresh_linked_ranges(self, cx);
12594                cx.emit(EditorEvent::Reparsed(*buffer_id));
12595                cx.notify();
12596            }
12597            multi_buffer::Event::DirtyChanged => cx.emit(EditorEvent::DirtyChanged),
12598            multi_buffer::Event::Saved => cx.emit(EditorEvent::Saved),
12599            multi_buffer::Event::FileHandleChanged | multi_buffer::Event::Reloaded => {
12600                cx.emit(EditorEvent::TitleChanged)
12601            }
12602            multi_buffer::Event::DiffBaseChanged => {
12603                self.scrollbar_marker_state.dirty = true;
12604                cx.emit(EditorEvent::DiffBaseChanged);
12605                cx.notify();
12606            }
12607            multi_buffer::Event::DiffUpdated { buffer } => {
12608                self.sync_expanded_diff_hunks(buffer.clone(), cx);
12609                cx.notify();
12610            }
12611            multi_buffer::Event::Closed => cx.emit(EditorEvent::Closed),
12612            multi_buffer::Event::DiagnosticsUpdated => {
12613                self.refresh_active_diagnostics(cx);
12614                self.scrollbar_marker_state.dirty = true;
12615                cx.notify();
12616            }
12617            _ => {}
12618        };
12619    }
12620
12621    fn on_display_map_changed(&mut self, _: Model<DisplayMap>, cx: &mut ViewContext<Self>) {
12622        cx.notify();
12623    }
12624
12625    fn settings_changed(&mut self, cx: &mut ViewContext<Self>) {
12626        self.tasks_update_task = Some(self.refresh_runnables(cx));
12627        self.refresh_inline_completion(true, false, cx);
12628        self.refresh_inlay_hints(
12629            InlayHintRefreshReason::SettingsChange(inlay_hint_settings(
12630                self.selections.newest_anchor().head(),
12631                &self.buffer.read(cx).snapshot(cx),
12632                cx,
12633            )),
12634            cx,
12635        );
12636
12637        let old_cursor_shape = self.cursor_shape;
12638
12639        {
12640            let editor_settings = EditorSettings::get_global(cx);
12641            self.scroll_manager.vertical_scroll_margin = editor_settings.vertical_scroll_margin;
12642            self.show_breadcrumbs = editor_settings.toolbar.breadcrumbs;
12643            self.cursor_shape = editor_settings.cursor_shape.unwrap_or_default();
12644        }
12645
12646        if old_cursor_shape != self.cursor_shape {
12647            cx.emit(EditorEvent::CursorShapeChanged);
12648        }
12649
12650        let project_settings = ProjectSettings::get_global(cx);
12651        self.serialize_dirty_buffers = project_settings.session.restore_unsaved_buffers;
12652
12653        if self.mode == EditorMode::Full {
12654            let inline_blame_enabled = project_settings.git.inline_blame_enabled();
12655            if self.git_blame_inline_enabled != inline_blame_enabled {
12656                self.toggle_git_blame_inline_internal(false, cx);
12657            }
12658        }
12659
12660        cx.notify();
12661    }
12662
12663    pub fn set_searchable(&mut self, searchable: bool) {
12664        self.searchable = searchable;
12665    }
12666
12667    pub fn searchable(&self) -> bool {
12668        self.searchable
12669    }
12670
12671    fn open_proposed_changes_editor(
12672        &mut self,
12673        _: &OpenProposedChangesEditor,
12674        cx: &mut ViewContext<Self>,
12675    ) {
12676        let Some(workspace) = self.workspace() else {
12677            cx.propagate();
12678            return;
12679        };
12680
12681        let selections = self.selections.all::<usize>(cx);
12682        let buffer = self.buffer.read(cx);
12683        let mut new_selections_by_buffer = HashMap::default();
12684        for selection in selections {
12685            for (buffer, range, _) in
12686                buffer.range_to_buffer_ranges(selection.start..selection.end, cx)
12687            {
12688                let mut range = range.to_point(buffer.read(cx));
12689                range.start.column = 0;
12690                range.end.column = buffer.read(cx).line_len(range.end.row);
12691                new_selections_by_buffer
12692                    .entry(buffer)
12693                    .or_insert(Vec::new())
12694                    .push(range)
12695            }
12696        }
12697
12698        let proposed_changes_buffers = new_selections_by_buffer
12699            .into_iter()
12700            .map(|(buffer, ranges)| ProposedChangeLocation { buffer, ranges })
12701            .collect::<Vec<_>>();
12702        let proposed_changes_editor = cx.new_view(|cx| {
12703            ProposedChangesEditor::new(
12704                "Proposed changes",
12705                proposed_changes_buffers,
12706                self.project.clone(),
12707                cx,
12708            )
12709        });
12710
12711        cx.window_context().defer(move |cx| {
12712            workspace.update(cx, |workspace, cx| {
12713                workspace.active_pane().update(cx, |pane, cx| {
12714                    pane.add_item(Box::new(proposed_changes_editor), true, true, None, cx);
12715                });
12716            });
12717        });
12718    }
12719
12720    pub fn open_excerpts_in_split(&mut self, _: &OpenExcerptsSplit, cx: &mut ViewContext<Self>) {
12721        self.open_excerpts_common(None, true, cx)
12722    }
12723
12724    pub fn open_excerpts(&mut self, _: &OpenExcerpts, cx: &mut ViewContext<Self>) {
12725        self.open_excerpts_common(None, false, cx)
12726    }
12727
12728    fn open_excerpts_common(
12729        &mut self,
12730        jump_data: Option<JumpData>,
12731        split: bool,
12732        cx: &mut ViewContext<Self>,
12733    ) {
12734        let Some(workspace) = self.workspace() else {
12735            cx.propagate();
12736            return;
12737        };
12738
12739        if self.buffer.read(cx).is_singleton() {
12740            cx.propagate();
12741            return;
12742        }
12743
12744        let mut new_selections_by_buffer = HashMap::default();
12745        match &jump_data {
12746            Some(jump_data) => {
12747                let multi_buffer_snapshot = self.buffer.read(cx).snapshot(cx);
12748                if let Some(buffer) = multi_buffer_snapshot
12749                    .buffer_id_for_excerpt(jump_data.excerpt_id)
12750                    .and_then(|buffer_id| self.buffer.read(cx).buffer(buffer_id))
12751                {
12752                    let buffer_snapshot = buffer.read(cx).snapshot();
12753                    let jump_to_point = if buffer_snapshot.can_resolve(&jump_data.anchor) {
12754                        language::ToPoint::to_point(&jump_data.anchor, &buffer_snapshot)
12755                    } else {
12756                        buffer_snapshot.clip_point(jump_data.position, Bias::Left)
12757                    };
12758                    let jump_to_offset = buffer_snapshot.point_to_offset(jump_to_point);
12759                    new_selections_by_buffer.insert(
12760                        buffer,
12761                        (
12762                            vec![jump_to_offset..jump_to_offset],
12763                            Some(jump_data.line_offset_from_top),
12764                        ),
12765                    );
12766                }
12767            }
12768            None => {
12769                let selections = self.selections.all::<usize>(cx);
12770                let buffer = self.buffer.read(cx);
12771                for selection in selections {
12772                    for (mut buffer_handle, mut range, _) in
12773                        buffer.range_to_buffer_ranges(selection.range(), cx)
12774                    {
12775                        // When editing branch buffers, jump to the corresponding location
12776                        // in their base buffer.
12777                        let buffer = buffer_handle.read(cx);
12778                        if let Some(base_buffer) = buffer.diff_base_buffer() {
12779                            range = buffer.range_to_version(range, &base_buffer.read(cx).version());
12780                            buffer_handle = base_buffer;
12781                        }
12782
12783                        if selection.reversed {
12784                            mem::swap(&mut range.start, &mut range.end);
12785                        }
12786                        new_selections_by_buffer
12787                            .entry(buffer_handle)
12788                            .or_insert((Vec::new(), None))
12789                            .0
12790                            .push(range)
12791                    }
12792                }
12793            }
12794        }
12795
12796        if new_selections_by_buffer.is_empty() {
12797            return;
12798        }
12799
12800        // We defer the pane interaction because we ourselves are a workspace item
12801        // and activating a new item causes the pane to call a method on us reentrantly,
12802        // which panics if we're on the stack.
12803        cx.window_context().defer(move |cx| {
12804            workspace.update(cx, |workspace, cx| {
12805                let pane = if split {
12806                    workspace.adjacent_pane(cx)
12807                } else {
12808                    workspace.active_pane().clone()
12809                };
12810
12811                for (buffer, (ranges, scroll_offset)) in new_selections_by_buffer {
12812                    let editor =
12813                        workspace.open_project_item::<Self>(pane.clone(), buffer, true, true, cx);
12814                    editor.update(cx, |editor, cx| {
12815                        let autoscroll = match scroll_offset {
12816                            Some(scroll_offset) => Autoscroll::top_relative(scroll_offset as usize),
12817                            None => Autoscroll::newest(),
12818                        };
12819                        let nav_history = editor.nav_history.take();
12820                        editor.change_selections(Some(autoscroll), cx, |s| {
12821                            s.select_ranges(ranges);
12822                        });
12823                        editor.nav_history = nav_history;
12824                    });
12825                }
12826            })
12827        });
12828    }
12829
12830    fn marked_text_ranges(&self, cx: &AppContext) -> Option<Vec<Range<OffsetUtf16>>> {
12831        let snapshot = self.buffer.read(cx).read(cx);
12832        let (_, ranges) = self.text_highlights::<InputComposition>(cx)?;
12833        Some(
12834            ranges
12835                .iter()
12836                .map(move |range| {
12837                    range.start.to_offset_utf16(&snapshot)..range.end.to_offset_utf16(&snapshot)
12838                })
12839                .collect(),
12840        )
12841    }
12842
12843    fn selection_replacement_ranges(
12844        &self,
12845        range: Range<OffsetUtf16>,
12846        cx: &mut AppContext,
12847    ) -> Vec<Range<OffsetUtf16>> {
12848        let selections = self.selections.all::<OffsetUtf16>(cx);
12849        let newest_selection = selections
12850            .iter()
12851            .max_by_key(|selection| selection.id)
12852            .unwrap();
12853        let start_delta = range.start.0 as isize - newest_selection.start.0 as isize;
12854        let end_delta = range.end.0 as isize - newest_selection.end.0 as isize;
12855        let snapshot = self.buffer.read(cx).read(cx);
12856        selections
12857            .into_iter()
12858            .map(|mut selection| {
12859                selection.start.0 =
12860                    (selection.start.0 as isize).saturating_add(start_delta) as usize;
12861                selection.end.0 = (selection.end.0 as isize).saturating_add(end_delta) as usize;
12862                snapshot.clip_offset_utf16(selection.start, Bias::Left)
12863                    ..snapshot.clip_offset_utf16(selection.end, Bias::Right)
12864            })
12865            .collect()
12866    }
12867
12868    fn report_editor_event(
12869        &self,
12870        operation: &'static str,
12871        file_extension: Option<String>,
12872        cx: &AppContext,
12873    ) {
12874        if cfg!(any(test, feature = "test-support")) {
12875            return;
12876        }
12877
12878        let Some(project) = &self.project else { return };
12879
12880        // If None, we are in a file without an extension
12881        let file = self
12882            .buffer
12883            .read(cx)
12884            .as_singleton()
12885            .and_then(|b| b.read(cx).file());
12886        let file_extension = file_extension.or(file
12887            .as_ref()
12888            .and_then(|file| Path::new(file.file_name(cx)).extension())
12889            .and_then(|e| e.to_str())
12890            .map(|a| a.to_string()));
12891
12892        let vim_mode = cx
12893            .global::<SettingsStore>()
12894            .raw_user_settings()
12895            .get("vim_mode")
12896            == Some(&serde_json::Value::Bool(true));
12897
12898        let copilot_enabled = all_language_settings(file, cx).inline_completions.provider
12899            == language::language_settings::InlineCompletionProvider::Copilot;
12900        let copilot_enabled_for_language = self
12901            .buffer
12902            .read(cx)
12903            .settings_at(0, cx)
12904            .show_inline_completions;
12905
12906        let project = project.read(cx);
12907        let telemetry = project.client().telemetry().clone();
12908        telemetry.report_editor_event(
12909            file_extension,
12910            vim_mode,
12911            operation,
12912            copilot_enabled,
12913            copilot_enabled_for_language,
12914            project.is_via_ssh(),
12915        )
12916    }
12917
12918    /// Copy the highlighted chunks to the clipboard as JSON. The format is an array of lines,
12919    /// with each line being an array of {text, highlight} objects.
12920    fn copy_highlight_json(&mut self, _: &CopyHighlightJson, cx: &mut ViewContext<Self>) {
12921        let Some(buffer) = self.buffer.read(cx).as_singleton() else {
12922            return;
12923        };
12924
12925        #[derive(Serialize)]
12926        struct Chunk<'a> {
12927            text: String,
12928            highlight: Option<&'a str>,
12929        }
12930
12931        let snapshot = buffer.read(cx).snapshot();
12932        let range = self
12933            .selected_text_range(false, cx)
12934            .and_then(|selection| {
12935                if selection.range.is_empty() {
12936                    None
12937                } else {
12938                    Some(selection.range)
12939                }
12940            })
12941            .unwrap_or_else(|| 0..snapshot.len());
12942
12943        let chunks = snapshot.chunks(range, true);
12944        let mut lines = Vec::new();
12945        let mut line: VecDeque<Chunk> = VecDeque::new();
12946
12947        let Some(style) = self.style.as_ref() else {
12948            return;
12949        };
12950
12951        for chunk in chunks {
12952            let highlight = chunk
12953                .syntax_highlight_id
12954                .and_then(|id| id.name(&style.syntax));
12955            let mut chunk_lines = chunk.text.split('\n').peekable();
12956            while let Some(text) = chunk_lines.next() {
12957                let mut merged_with_last_token = false;
12958                if let Some(last_token) = line.back_mut() {
12959                    if last_token.highlight == highlight {
12960                        last_token.text.push_str(text);
12961                        merged_with_last_token = true;
12962                    }
12963                }
12964
12965                if !merged_with_last_token {
12966                    line.push_back(Chunk {
12967                        text: text.into(),
12968                        highlight,
12969                    });
12970                }
12971
12972                if chunk_lines.peek().is_some() {
12973                    if line.len() > 1 && line.front().unwrap().text.is_empty() {
12974                        line.pop_front();
12975                    }
12976                    if line.len() > 1 && line.back().unwrap().text.is_empty() {
12977                        line.pop_back();
12978                    }
12979
12980                    lines.push(mem::take(&mut line));
12981                }
12982            }
12983        }
12984
12985        let Some(lines) = serde_json::to_string_pretty(&lines).log_err() else {
12986            return;
12987        };
12988        cx.write_to_clipboard(ClipboardItem::new_string(lines));
12989    }
12990
12991    pub fn inlay_hint_cache(&self) -> &InlayHintCache {
12992        &self.inlay_hint_cache
12993    }
12994
12995    pub fn replay_insert_event(
12996        &mut self,
12997        text: &str,
12998        relative_utf16_range: Option<Range<isize>>,
12999        cx: &mut ViewContext<Self>,
13000    ) {
13001        if !self.input_enabled {
13002            cx.emit(EditorEvent::InputIgnored { text: text.into() });
13003            return;
13004        }
13005        if let Some(relative_utf16_range) = relative_utf16_range {
13006            let selections = self.selections.all::<OffsetUtf16>(cx);
13007            self.change_selections(None, cx, |s| {
13008                let new_ranges = selections.into_iter().map(|range| {
13009                    let start = OffsetUtf16(
13010                        range
13011                            .head()
13012                            .0
13013                            .saturating_add_signed(relative_utf16_range.start),
13014                    );
13015                    let end = OffsetUtf16(
13016                        range
13017                            .head()
13018                            .0
13019                            .saturating_add_signed(relative_utf16_range.end),
13020                    );
13021                    start..end
13022                });
13023                s.select_ranges(new_ranges);
13024            });
13025        }
13026
13027        self.handle_input(text, cx);
13028    }
13029
13030    pub fn supports_inlay_hints(&self, cx: &AppContext) -> bool {
13031        let Some(provider) = self.semantics_provider.as_ref() else {
13032            return false;
13033        };
13034
13035        let mut supports = false;
13036        self.buffer().read(cx).for_each_buffer(|buffer| {
13037            supports |= provider.supports_inlay_hints(buffer, cx);
13038        });
13039        supports
13040    }
13041
13042    pub fn focus(&self, cx: &mut WindowContext) {
13043        cx.focus(&self.focus_handle)
13044    }
13045
13046    pub fn is_focused(&self, cx: &WindowContext) -> bool {
13047        self.focus_handle.is_focused(cx)
13048    }
13049
13050    fn handle_focus(&mut self, cx: &mut ViewContext<Self>) {
13051        cx.emit(EditorEvent::Focused);
13052
13053        if let Some(descendant) = self
13054            .last_focused_descendant
13055            .take()
13056            .and_then(|descendant| descendant.upgrade())
13057        {
13058            cx.focus(&descendant);
13059        } else {
13060            if let Some(blame) = self.blame.as_ref() {
13061                blame.update(cx, GitBlame::focus)
13062            }
13063
13064            self.blink_manager.update(cx, BlinkManager::enable);
13065            self.show_cursor_names(cx);
13066            self.buffer.update(cx, |buffer, cx| {
13067                buffer.finalize_last_transaction(cx);
13068                if self.leader_peer_id.is_none() {
13069                    buffer.set_active_selections(
13070                        &self.selections.disjoint_anchors(),
13071                        self.selections.line_mode,
13072                        self.cursor_shape,
13073                        cx,
13074                    );
13075                }
13076            });
13077        }
13078    }
13079
13080    fn handle_focus_in(&mut self, cx: &mut ViewContext<Self>) {
13081        cx.emit(EditorEvent::FocusedIn)
13082    }
13083
13084    fn handle_focus_out(&mut self, event: FocusOutEvent, _cx: &mut ViewContext<Self>) {
13085        if event.blurred != self.focus_handle {
13086            self.last_focused_descendant = Some(event.blurred);
13087        }
13088    }
13089
13090    pub fn handle_blur(&mut self, cx: &mut ViewContext<Self>) {
13091        self.blink_manager.update(cx, BlinkManager::disable);
13092        self.buffer
13093            .update(cx, |buffer, cx| buffer.remove_active_selections(cx));
13094
13095        if let Some(blame) = self.blame.as_ref() {
13096            blame.update(cx, GitBlame::blur)
13097        }
13098        if !self.hover_state.focused(cx) {
13099            hide_hover(self, cx);
13100        }
13101
13102        self.hide_context_menu(cx);
13103        cx.emit(EditorEvent::Blurred);
13104        cx.notify();
13105    }
13106
13107    pub fn register_action<A: Action>(
13108        &mut self,
13109        listener: impl Fn(&A, &mut WindowContext) + 'static,
13110    ) -> Subscription {
13111        let id = self.next_editor_action_id.post_inc();
13112        let listener = Arc::new(listener);
13113        self.editor_actions.borrow_mut().insert(
13114            id,
13115            Box::new(move |cx| {
13116                let cx = cx.window_context();
13117                let listener = listener.clone();
13118                cx.on_action(TypeId::of::<A>(), move |action, phase, cx| {
13119                    let action = action.downcast_ref().unwrap();
13120                    if phase == DispatchPhase::Bubble {
13121                        listener(action, cx)
13122                    }
13123                })
13124            }),
13125        );
13126
13127        let editor_actions = self.editor_actions.clone();
13128        Subscription::new(move || {
13129            editor_actions.borrow_mut().remove(&id);
13130        })
13131    }
13132
13133    pub fn file_header_size(&self) -> u32 {
13134        FILE_HEADER_HEIGHT
13135    }
13136
13137    pub fn revert(
13138        &mut self,
13139        revert_changes: HashMap<BufferId, Vec<(Range<text::Anchor>, Rope)>>,
13140        cx: &mut ViewContext<Self>,
13141    ) {
13142        self.buffer().update(cx, |multi_buffer, cx| {
13143            for (buffer_id, changes) in revert_changes {
13144                if let Some(buffer) = multi_buffer.buffer(buffer_id) {
13145                    buffer.update(cx, |buffer, cx| {
13146                        buffer.edit(
13147                            changes.into_iter().map(|(range, text)| {
13148                                (range, text.to_string().map(Arc::<str>::from))
13149                            }),
13150                            None,
13151                            cx,
13152                        );
13153                    });
13154                }
13155            }
13156        });
13157        self.change_selections(None, cx, |selections| selections.refresh());
13158    }
13159
13160    pub fn to_pixel_point(
13161        &mut self,
13162        source: multi_buffer::Anchor,
13163        editor_snapshot: &EditorSnapshot,
13164        cx: &mut ViewContext<Self>,
13165    ) -> Option<gpui::Point<Pixels>> {
13166        let source_point = source.to_display_point(editor_snapshot);
13167        self.display_to_pixel_point(source_point, editor_snapshot, cx)
13168    }
13169
13170    pub fn display_to_pixel_point(
13171        &mut self,
13172        source: DisplayPoint,
13173        editor_snapshot: &EditorSnapshot,
13174        cx: &mut ViewContext<Self>,
13175    ) -> Option<gpui::Point<Pixels>> {
13176        let line_height = self.style()?.text.line_height_in_pixels(cx.rem_size());
13177        let text_layout_details = self.text_layout_details(cx);
13178        let scroll_top = text_layout_details
13179            .scroll_anchor
13180            .scroll_position(editor_snapshot)
13181            .y;
13182
13183        if source.row().as_f32() < scroll_top.floor() {
13184            return None;
13185        }
13186        let source_x = editor_snapshot.x_for_display_point(source, &text_layout_details);
13187        let source_y = line_height * (source.row().as_f32() - scroll_top);
13188        Some(gpui::Point::new(source_x, source_y))
13189    }
13190
13191    pub fn has_active_completions_menu(&self) -> bool {
13192        self.context_menu.read().as_ref().map_or(false, |menu| {
13193            menu.visible() && matches!(menu, ContextMenu::Completions(_))
13194        })
13195    }
13196
13197    pub fn register_addon<T: Addon>(&mut self, instance: T) {
13198        self.addons
13199            .insert(std::any::TypeId::of::<T>(), Box::new(instance));
13200    }
13201
13202    pub fn unregister_addon<T: Addon>(&mut self) {
13203        self.addons.remove(&std::any::TypeId::of::<T>());
13204    }
13205
13206    pub fn addon<T: Addon>(&self) -> Option<&T> {
13207        let type_id = std::any::TypeId::of::<T>();
13208        self.addons
13209            .get(&type_id)
13210            .and_then(|item| item.to_any().downcast_ref::<T>())
13211    }
13212}
13213
13214fn char_len_with_expanded_tabs(offset: usize, text: &str, tab_size: NonZeroU32) -> usize {
13215    let tab_size = tab_size.get() as usize;
13216    let mut width = offset;
13217
13218    for ch in text.chars() {
13219        width += if ch == '\t' {
13220            tab_size - (width % tab_size)
13221        } else {
13222            1
13223        };
13224    }
13225
13226    width - offset
13227}
13228
13229#[cfg(test)]
13230mod tests {
13231    use super::*;
13232
13233    #[test]
13234    fn test_string_size_with_expanded_tabs() {
13235        let nz = |val| NonZeroU32::new(val).unwrap();
13236        assert_eq!(char_len_with_expanded_tabs(0, "", nz(4)), 0);
13237        assert_eq!(char_len_with_expanded_tabs(0, "hello", nz(4)), 5);
13238        assert_eq!(char_len_with_expanded_tabs(0, "\thello", nz(4)), 9);
13239        assert_eq!(char_len_with_expanded_tabs(0, "abc\tab", nz(4)), 6);
13240        assert_eq!(char_len_with_expanded_tabs(0, "hello\t", nz(4)), 8);
13241        assert_eq!(char_len_with_expanded_tabs(0, "\t\t", nz(8)), 16);
13242        assert_eq!(char_len_with_expanded_tabs(0, "x\t", nz(8)), 8);
13243        assert_eq!(char_len_with_expanded_tabs(7, "x\t", nz(8)), 9);
13244    }
13245}
13246
13247/// Tokenizes a string into runs of text that should stick together, or that is whitespace.
13248struct WordBreakingTokenizer<'a> {
13249    input: &'a str,
13250}
13251
13252impl<'a> WordBreakingTokenizer<'a> {
13253    fn new(input: &'a str) -> Self {
13254        Self { input }
13255    }
13256}
13257
13258fn is_char_ideographic(ch: char) -> bool {
13259    use unicode_script::Script::*;
13260    use unicode_script::UnicodeScript;
13261    matches!(ch.script(), Han | Tangut | Yi)
13262}
13263
13264fn is_grapheme_ideographic(text: &str) -> bool {
13265    text.chars().any(is_char_ideographic)
13266}
13267
13268fn is_grapheme_whitespace(text: &str) -> bool {
13269    text.chars().any(|x| x.is_whitespace())
13270}
13271
13272fn should_stay_with_preceding_ideograph(text: &str) -> bool {
13273    text.chars().next().map_or(false, |ch| {
13274        matches!(ch, '。' | '、' | '，' | '？' | '！' | '：' | '；' | '…')
13275    })
13276}
13277
13278#[derive(PartialEq, Eq, Debug, Clone, Copy)]
13279struct WordBreakToken<'a> {
13280    token: &'a str,
13281    grapheme_len: usize,
13282    is_whitespace: bool,
13283}
13284
13285impl<'a> Iterator for WordBreakingTokenizer<'a> {
13286    /// Yields a span, the count of graphemes in the token, and whether it was
13287    /// whitespace. Note that it also breaks at word boundaries.
13288    type Item = WordBreakToken<'a>;
13289
13290    fn next(&mut self) -> Option<Self::Item> {
13291        use unicode_segmentation::UnicodeSegmentation;
13292        if self.input.is_empty() {
13293            return None;
13294        }
13295
13296        let mut iter = self.input.graphemes(true).peekable();
13297        let mut offset = 0;
13298        let mut graphemes = 0;
13299        if let Some(first_grapheme) = iter.next() {
13300            let is_whitespace = is_grapheme_whitespace(first_grapheme);
13301            offset += first_grapheme.len();
13302            graphemes += 1;
13303            if is_grapheme_ideographic(first_grapheme) && !is_whitespace {
13304                if let Some(grapheme) = iter.peek().copied() {
13305                    if should_stay_with_preceding_ideograph(grapheme) {
13306                        offset += grapheme.len();
13307                        graphemes += 1;
13308                    }
13309                }
13310            } else {
13311                let mut words = self.input[offset..].split_word_bound_indices().peekable();
13312                let mut next_word_bound = words.peek().copied();
13313                if next_word_bound.map_or(false, |(i, _)| i == 0) {
13314                    next_word_bound = words.next();
13315                }
13316                while let Some(grapheme) = iter.peek().copied() {
13317                    if next_word_bound.map_or(false, |(i, _)| i == offset) {
13318                        break;
13319                    };
13320                    if is_grapheme_whitespace(grapheme) != is_whitespace {
13321                        break;
13322                    };
13323                    offset += grapheme.len();
13324                    graphemes += 1;
13325                    iter.next();
13326                }
13327            }
13328            let token = &self.input[..offset];
13329            self.input = &self.input[offset..];
13330            if is_whitespace {
13331                Some(WordBreakToken {
13332                    token: " ",
13333                    grapheme_len: 1,
13334                    is_whitespace: true,
13335                })
13336            } else {
13337                Some(WordBreakToken {
13338                    token,
13339                    grapheme_len: graphemes,
13340                    is_whitespace: false,
13341                })
13342            }
13343        } else {
13344            None
13345        }
13346    }
13347}
13348
13349#[test]
13350fn test_word_breaking_tokenizer() {
13351    let tests: &[(&str, &[(&str, usize, bool)])] = &[
13352        ("", &[]),
13353        ("  ", &[(" ", 1, true)]),
13354        ("Ʒ", &[("Ʒ", 1, false)]),
13355        ("Ǽ", &[("Ǽ", 1, false)]),
13356        ("⋑", &[("⋑", 1, false)]),
13357        ("⋑⋑", &[("⋑⋑", 2, false)]),
13358        (
13359            "原理，进而",
13360            &[
13361                ("原", 1, false),
13362                ("理，", 2, false),
13363                ("进", 1, false),
13364                ("而", 1, false),
13365            ],
13366        ),
13367        (
13368            "hello world",
13369            &[("hello", 5, false), (" ", 1, true), ("world", 5, false)],
13370        ),
13371        (
13372            "hello, world",
13373            &[("hello,", 6, false), (" ", 1, true), ("world", 5, false)],
13374        ),
13375        (
13376            "  hello world",
13377            &[
13378                (" ", 1, true),
13379                ("hello", 5, false),
13380                (" ", 1, true),
13381                ("world", 5, false),
13382            ],
13383        ),
13384        (
13385            "这是什么 \n 钢笔",
13386            &[
13387                ("这", 1, false),
13388                ("是", 1, false),
13389                ("什", 1, false),
13390                ("么", 1, false),
13391                (" ", 1, true),
13392                ("钢", 1, false),
13393                ("笔", 1, false),
13394            ],
13395        ),
13396        (" mutton", &[(" ", 1, true), ("mutton", 6, false)]),
13397    ];
13398
13399    for (input, result) in tests {
13400        assert_eq!(
13401            WordBreakingTokenizer::new(input).collect::<Vec<_>>(),
13402            result
13403                .iter()
13404                .copied()
13405                .map(|(token, grapheme_len, is_whitespace)| WordBreakToken {
13406                    token,
13407                    grapheme_len,
13408                    is_whitespace,
13409                })
13410                .collect::<Vec<_>>()
13411        );
13412    }
13413}
13414
13415fn wrap_with_prefix(
13416    line_prefix: String,
13417    unwrapped_text: String,
13418    wrap_column: usize,
13419    tab_size: NonZeroU32,
13420) -> String {
13421    let line_prefix_len = char_len_with_expanded_tabs(0, &line_prefix, tab_size);
13422    let mut wrapped_text = String::new();
13423    let mut current_line = line_prefix.clone();
13424
13425    let tokenizer = WordBreakingTokenizer::new(&unwrapped_text);
13426    let mut current_line_len = line_prefix_len;
13427    for WordBreakToken {
13428        token,
13429        grapheme_len,
13430        is_whitespace,
13431    } in tokenizer
13432    {
13433        if current_line_len + grapheme_len > wrap_column && current_line_len != line_prefix_len {
13434            wrapped_text.push_str(current_line.trim_end());
13435            wrapped_text.push('\n');
13436            current_line.truncate(line_prefix.len());
13437            current_line_len = line_prefix_len;
13438            if !is_whitespace {
13439                current_line.push_str(token);
13440                current_line_len += grapheme_len;
13441            }
13442        } else if !is_whitespace {
13443            current_line.push_str(token);
13444            current_line_len += grapheme_len;
13445        } else if current_line_len != line_prefix_len {
13446            current_line.push(' ');
13447            current_line_len += 1;
13448        }
13449    }
13450
13451    if !current_line.is_empty() {
13452        wrapped_text.push_str(&current_line);
13453    }
13454    wrapped_text
13455}
13456
13457#[test]
13458fn test_wrap_with_prefix() {
13459    assert_eq!(
13460        wrap_with_prefix(
13461            "# ".to_string(),
13462            "abcdefg".to_string(),
13463            4,
13464            NonZeroU32::new(4).unwrap()
13465        ),
13466        "# abcdefg"
13467    );
13468    assert_eq!(
13469        wrap_with_prefix(
13470            "".to_string(),
13471            "\thello world".to_string(),
13472            8,
13473            NonZeroU32::new(4).unwrap()
13474        ),
13475        "hello\nworld"
13476    );
13477    assert_eq!(
13478        wrap_with_prefix(
13479            "// ".to_string(),
13480            "xx \nyy zz aa bb cc".to_string(),
13481            12,
13482            NonZeroU32::new(4).unwrap()
13483        ),
13484        "// xx yy zz\n// aa bb cc"
13485    );
13486    assert_eq!(
13487        wrap_with_prefix(
13488            String::new(),
13489            "这是什么 \n 钢笔".to_string(),
13490            3,
13491            NonZeroU32::new(4).unwrap()
13492        ),
13493        "这是什\n么 钢\n笔"
13494    );
13495}
13496
13497fn hunks_for_selections(
13498    multi_buffer_snapshot: &MultiBufferSnapshot,
13499    selections: &[Selection<Anchor>],
13500) -> Vec<MultiBufferDiffHunk> {
13501    let buffer_rows_for_selections = selections.iter().map(|selection| {
13502        let head = selection.head();
13503        let tail = selection.tail();
13504        let start = MultiBufferRow(tail.to_point(multi_buffer_snapshot).row);
13505        let end = MultiBufferRow(head.to_point(multi_buffer_snapshot).row);
13506        if start > end {
13507            end..start
13508        } else {
13509            start..end
13510        }
13511    });
13512
13513    hunks_for_rows(buffer_rows_for_selections, multi_buffer_snapshot)
13514}
13515
13516pub fn hunks_for_rows(
13517    rows: impl Iterator<Item = Range<MultiBufferRow>>,
13518    multi_buffer_snapshot: &MultiBufferSnapshot,
13519) -> Vec<MultiBufferDiffHunk> {
13520    let mut hunks = Vec::new();
13521    let mut processed_buffer_rows: HashMap<BufferId, HashSet<Range<text::Anchor>>> =
13522        HashMap::default();
13523    for selected_multi_buffer_rows in rows {
13524        let query_rows =
13525            selected_multi_buffer_rows.start..selected_multi_buffer_rows.end.next_row();
13526        for hunk in multi_buffer_snapshot.git_diff_hunks_in_range(query_rows.clone()) {
13527            // Deleted hunk is an empty row range, no caret can be placed there and Zed allows to revert it
13528            // when the caret is just above or just below the deleted hunk.
13529            let allow_adjacent = hunk_status(&hunk) == DiffHunkStatus::Removed;
13530            let related_to_selection = if allow_adjacent {
13531                hunk.row_range.overlaps(&query_rows)
13532                    || hunk.row_range.start == query_rows.end
13533                    || hunk.row_range.end == query_rows.start
13534            } else {
13535                // `selected_multi_buffer_rows` are inclusive (e.g. [2..2] means 2nd row is selected)
13536                // `hunk.row_range` is exclusive (e.g. [2..3] means 2nd row is selected)
13537                hunk.row_range.overlaps(&selected_multi_buffer_rows)
13538                    || selected_multi_buffer_rows.end == hunk.row_range.start
13539            };
13540            if related_to_selection {
13541                if !processed_buffer_rows
13542                    .entry(hunk.buffer_id)
13543                    .or_default()
13544                    .insert(hunk.buffer_range.start..hunk.buffer_range.end)
13545                {
13546                    continue;
13547                }
13548                hunks.push(hunk);
13549            }
13550        }
13551    }
13552
13553    hunks
13554}
13555
13556pub trait CollaborationHub {
13557    fn collaborators<'a>(&self, cx: &'a AppContext) -> &'a HashMap<PeerId, Collaborator>;
13558    fn user_participant_indices<'a>(
13559        &self,
13560        cx: &'a AppContext,
13561    ) -> &'a HashMap<u64, ParticipantIndex>;
13562    fn user_names(&self, cx: &AppContext) -> HashMap<u64, SharedString>;
13563}
13564
13565impl CollaborationHub for Model<Project> {
13566    fn collaborators<'a>(&self, cx: &'a AppContext) -> &'a HashMap<PeerId, Collaborator> {
13567        self.read(cx).collaborators()
13568    }
13569
13570    fn user_participant_indices<'a>(
13571        &self,
13572        cx: &'a AppContext,
13573    ) -> &'a HashMap<u64, ParticipantIndex> {
13574        self.read(cx).user_store().read(cx).participant_indices()
13575    }
13576
13577    fn user_names(&self, cx: &AppContext) -> HashMap<u64, SharedString> {
13578        let this = self.read(cx);
13579        let user_ids = this.collaborators().values().map(|c| c.user_id);
13580        this.user_store().read_with(cx, |user_store, cx| {
13581            user_store.participant_names(user_ids, cx)
13582        })
13583    }
13584}
13585
13586pub trait SemanticsProvider {
13587    fn hover(
13588        &self,
13589        buffer: &Model<Buffer>,
13590        position: text::Anchor,
13591        cx: &mut AppContext,
13592    ) -> Option<Task<Vec<project::Hover>>>;
13593
13594    fn inlay_hints(
13595        &self,
13596        buffer_handle: Model<Buffer>,
13597        range: Range<text::Anchor>,
13598        cx: &mut AppContext,
13599    ) -> Option<Task<anyhow::Result<Vec<InlayHint>>>>;
13600
13601    fn resolve_inlay_hint(
13602        &self,
13603        hint: InlayHint,
13604        buffer_handle: Model<Buffer>,
13605        server_id: LanguageServerId,
13606        cx: &mut AppContext,
13607    ) -> Option<Task<anyhow::Result<InlayHint>>>;
13608
13609    fn supports_inlay_hints(&self, buffer: &Model<Buffer>, cx: &AppContext) -> bool;
13610
13611    fn document_highlights(
13612        &self,
13613        buffer: &Model<Buffer>,
13614        position: text::Anchor,
13615        cx: &mut AppContext,
13616    ) -> Option<Task<Result<Vec<DocumentHighlight>>>>;
13617
13618    fn definitions(
13619        &self,
13620        buffer: &Model<Buffer>,
13621        position: text::Anchor,
13622        kind: GotoDefinitionKind,
13623        cx: &mut AppContext,
13624    ) -> Option<Task<Result<Vec<LocationLink>>>>;
13625
13626    fn range_for_rename(
13627        &self,
13628        buffer: &Model<Buffer>,
13629        position: text::Anchor,
13630        cx: &mut AppContext,
13631    ) -> Option<Task<Result<Option<Range<text::Anchor>>>>>;
13632
13633    fn perform_rename(
13634        &self,
13635        buffer: &Model<Buffer>,
13636        position: text::Anchor,
13637        new_name: String,
13638        cx: &mut AppContext,
13639    ) -> Option<Task<Result<ProjectTransaction>>>;
13640}
13641
13642pub trait CompletionProvider {
13643    fn completions(
13644        &self,
13645        buffer: &Model<Buffer>,
13646        buffer_position: text::Anchor,
13647        trigger: CompletionContext,
13648        cx: &mut ViewContext<Editor>,
13649    ) -> Task<Result<Vec<Completion>>>;
13650
13651    fn resolve_completions(
13652        &self,
13653        buffer: Model<Buffer>,
13654        completion_indices: Vec<usize>,
13655        completions: Arc<RwLock<Box<[Completion]>>>,
13656        cx: &mut ViewContext<Editor>,
13657    ) -> Task<Result<bool>>;
13658
13659    fn apply_additional_edits_for_completion(
13660        &self,
13661        buffer: Model<Buffer>,
13662        completion: Completion,
13663        push_to_history: bool,
13664        cx: &mut ViewContext<Editor>,
13665    ) -> Task<Result<Option<language::Transaction>>>;
13666
13667    fn is_completion_trigger(
13668        &self,
13669        buffer: &Model<Buffer>,
13670        position: language::Anchor,
13671        text: &str,
13672        trigger_in_words: bool,
13673        cx: &mut ViewContext<Editor>,
13674    ) -> bool;
13675
13676    fn sort_completions(&self) -> bool {
13677        true
13678    }
13679}
13680
13681pub trait CodeActionProvider {
13682    fn code_actions(
13683        &self,
13684        buffer: &Model<Buffer>,
13685        range: Range<text::Anchor>,
13686        cx: &mut WindowContext,
13687    ) -> Task<Result<Vec<CodeAction>>>;
13688
13689    fn apply_code_action(
13690        &self,
13691        buffer_handle: Model<Buffer>,
13692        action: CodeAction,
13693        excerpt_id: ExcerptId,
13694        push_to_history: bool,
13695        cx: &mut WindowContext,
13696    ) -> Task<Result<ProjectTransaction>>;
13697}
13698
13699impl CodeActionProvider for Model<Project> {
13700    fn code_actions(
13701        &self,
13702        buffer: &Model<Buffer>,
13703        range: Range<text::Anchor>,
13704        cx: &mut WindowContext,
13705    ) -> Task<Result<Vec<CodeAction>>> {
13706        self.update(cx, |project, cx| {
13707            project.code_actions(buffer, range, None, cx)
13708        })
13709    }
13710
13711    fn apply_code_action(
13712        &self,
13713        buffer_handle: Model<Buffer>,
13714        action: CodeAction,
13715        _excerpt_id: ExcerptId,
13716        push_to_history: bool,
13717        cx: &mut WindowContext,
13718    ) -> Task<Result<ProjectTransaction>> {
13719        self.update(cx, |project, cx| {
13720            project.apply_code_action(buffer_handle, action, push_to_history, cx)
13721        })
13722    }
13723}
13724
13725fn snippet_completions(
13726    project: &Project,
13727    buffer: &Model<Buffer>,
13728    buffer_position: text::Anchor,
13729    cx: &mut AppContext,
13730) -> Vec<Completion> {
13731    let language = buffer.read(cx).language_at(buffer_position);
13732    let language_name = language.as_ref().map(|language| language.lsp_id());
13733    let snippet_store = project.snippets().read(cx);
13734    let snippets = snippet_store.snippets_for(language_name, cx);
13735
13736    if snippets.is_empty() {
13737        return vec![];
13738    }
13739    let snapshot = buffer.read(cx).text_snapshot();
13740    let chars = snapshot.reversed_chars_for_range(text::Anchor::MIN..buffer_position);
13741
13742    let scope = language.map(|language| language.default_scope());
13743    let classifier = CharClassifier::new(scope).for_completion(true);
13744    let mut last_word = chars
13745        .take_while(|c| classifier.is_word(*c))
13746        .collect::<String>();
13747    last_word = last_word.chars().rev().collect();
13748    let as_offset = text::ToOffset::to_offset(&buffer_position, &snapshot);
13749    let to_lsp = |point: &text::Anchor| {
13750        let end = text::ToPointUtf16::to_point_utf16(point, &snapshot);
13751        point_to_lsp(end)
13752    };
13753    let lsp_end = to_lsp(&buffer_position);
13754    snippets
13755        .into_iter()
13756        .filter_map(|snippet| {
13757            let matching_prefix = snippet
13758                .prefix
13759                .iter()
13760                .find(|prefix| prefix.starts_with(&last_word))?;
13761            let start = as_offset - last_word.len();
13762            let start = snapshot.anchor_before(start);
13763            let range = start..buffer_position;
13764            let lsp_start = to_lsp(&start);
13765            let lsp_range = lsp::Range {
13766                start: lsp_start,
13767                end: lsp_end,
13768            };
13769            Some(Completion {
13770                old_range: range,
13771                new_text: snippet.body.clone(),
13772                label: CodeLabel {
13773                    text: matching_prefix.clone(),
13774                    runs: vec![],
13775                    filter_range: 0..matching_prefix.len(),
13776                },
13777                server_id: LanguageServerId(usize::MAX),
13778                documentation: snippet.description.clone().map(Documentation::SingleLine),
13779                lsp_completion: lsp::CompletionItem {
13780                    label: snippet.prefix.first().unwrap().clone(),
13781                    kind: Some(CompletionItemKind::SNIPPET),
13782                    label_details: snippet.description.as_ref().map(|description| {
13783                        lsp::CompletionItemLabelDetails {
13784                            detail: Some(description.clone()),
13785                            description: None,
13786                        }
13787                    }),
13788                    insert_text_format: Some(InsertTextFormat::SNIPPET),
13789                    text_edit: Some(lsp::CompletionTextEdit::InsertAndReplace(
13790                        lsp::InsertReplaceEdit {
13791                            new_text: snippet.body.clone(),
13792                            insert: lsp_range,
13793                            replace: lsp_range,
13794                        },
13795                    )),
13796                    filter_text: Some(snippet.body.clone()),
13797                    sort_text: Some(char::MAX.to_string()),
13798                    ..Default::default()
13799                },
13800                confirm: None,
13801            })
13802        })
13803        .collect()
13804}
13805
13806impl CompletionProvider for Model<Project> {
13807    fn completions(
13808        &self,
13809        buffer: &Model<Buffer>,
13810        buffer_position: text::Anchor,
13811        options: CompletionContext,
13812        cx: &mut ViewContext<Editor>,
13813    ) -> Task<Result<Vec<Completion>>> {
13814        self.update(cx, |project, cx| {
13815            let snippets = snippet_completions(project, buffer, buffer_position, cx);
13816            let project_completions = project.completions(buffer, buffer_position, options, cx);
13817            cx.background_executor().spawn(async move {
13818                let mut completions = project_completions.await?;
13819                //let snippets = snippets.into_iter().;
13820                completions.extend(snippets);
13821                Ok(completions)
13822            })
13823        })
13824    }
13825
13826    fn resolve_completions(
13827        &self,
13828        buffer: Model<Buffer>,
13829        completion_indices: Vec<usize>,
13830        completions: Arc<RwLock<Box<[Completion]>>>,
13831        cx: &mut ViewContext<Editor>,
13832    ) -> Task<Result<bool>> {
13833        self.update(cx, |project, cx| {
13834            project.resolve_completions(buffer, completion_indices, completions, cx)
13835        })
13836    }
13837
13838    fn apply_additional_edits_for_completion(
13839        &self,
13840        buffer: Model<Buffer>,
13841        completion: Completion,
13842        push_to_history: bool,
13843        cx: &mut ViewContext<Editor>,
13844    ) -> Task<Result<Option<language::Transaction>>> {
13845        self.update(cx, |project, cx| {
13846            project.apply_additional_edits_for_completion(buffer, completion, push_to_history, cx)
13847        })
13848    }
13849
13850    fn is_completion_trigger(
13851        &self,
13852        buffer: &Model<Buffer>,
13853        position: language::Anchor,
13854        text: &str,
13855        trigger_in_words: bool,
13856        cx: &mut ViewContext<Editor>,
13857    ) -> bool {
13858        if !EditorSettings::get_global(cx).show_completions_on_input {
13859            return false;
13860        }
13861
13862        let mut chars = text.chars();
13863        let char = if let Some(char) = chars.next() {
13864            char
13865        } else {
13866            return false;
13867        };
13868        if chars.next().is_some() {
13869            return false;
13870        }
13871
13872        let buffer = buffer.read(cx);
13873        let classifier = buffer
13874            .snapshot()
13875            .char_classifier_at(position)
13876            .for_completion(true);
13877        if trigger_in_words && classifier.is_word(char) {
13878            return true;
13879        }
13880
13881        buffer.completion_triggers().contains(text)
13882    }
13883}
13884
13885impl SemanticsProvider for Model<Project> {
13886    fn hover(
13887        &self,
13888        buffer: &Model<Buffer>,
13889        position: text::Anchor,
13890        cx: &mut AppContext,
13891    ) -> Option<Task<Vec<project::Hover>>> {
13892        Some(self.update(cx, |project, cx| project.hover(buffer, position, cx)))
13893    }
13894
13895    fn document_highlights(
13896        &self,
13897        buffer: &Model<Buffer>,
13898        position: text::Anchor,
13899        cx: &mut AppContext,
13900    ) -> Option<Task<Result<Vec<DocumentHighlight>>>> {
13901        Some(self.update(cx, |project, cx| {
13902            project.document_highlights(buffer, position, cx)
13903        }))
13904    }
13905
13906    fn definitions(
13907        &self,
13908        buffer: &Model<Buffer>,
13909        position: text::Anchor,
13910        kind: GotoDefinitionKind,
13911        cx: &mut AppContext,
13912    ) -> Option<Task<Result<Vec<LocationLink>>>> {
13913        Some(self.update(cx, |project, cx| match kind {
13914            GotoDefinitionKind::Symbol => project.definition(&buffer, position, cx),
13915            GotoDefinitionKind::Declaration => project.declaration(&buffer, position, cx),
13916            GotoDefinitionKind::Type => project.type_definition(&buffer, position, cx),
13917            GotoDefinitionKind::Implementation => project.implementation(&buffer, position, cx),
13918        }))
13919    }
13920
13921    fn supports_inlay_hints(&self, buffer: &Model<Buffer>, cx: &AppContext) -> bool {
13922        // TODO: make this work for remote projects
13923        self.read(cx)
13924            .language_servers_for_buffer(buffer.read(cx), cx)
13925            .any(
13926                |(_, server)| match server.capabilities().inlay_hint_provider {
13927                    Some(lsp::OneOf::Left(enabled)) => enabled,
13928                    Some(lsp::OneOf::Right(_)) => true,
13929                    None => false,
13930                },
13931            )
13932    }
13933
13934    fn inlay_hints(
13935        &self,
13936        buffer_handle: Model<Buffer>,
13937        range: Range<text::Anchor>,
13938        cx: &mut AppContext,
13939    ) -> Option<Task<anyhow::Result<Vec<InlayHint>>>> {
13940        Some(self.update(cx, |project, cx| {
13941            project.inlay_hints(buffer_handle, range, cx)
13942        }))
13943    }
13944
13945    fn resolve_inlay_hint(
13946        &self,
13947        hint: InlayHint,
13948        buffer_handle: Model<Buffer>,
13949        server_id: LanguageServerId,
13950        cx: &mut AppContext,
13951    ) -> Option<Task<anyhow::Result<InlayHint>>> {
13952        Some(self.update(cx, |project, cx| {
13953            project.resolve_inlay_hint(hint, buffer_handle, server_id, cx)
13954        }))
13955    }
13956
13957    fn range_for_rename(
13958        &self,
13959        buffer: &Model<Buffer>,
13960        position: text::Anchor,
13961        cx: &mut AppContext,
13962    ) -> Option<Task<Result<Option<Range<text::Anchor>>>>> {
13963        Some(self.update(cx, |project, cx| {
13964            project.prepare_rename(buffer.clone(), position, cx)
13965        }))
13966    }
13967
13968    fn perform_rename(
13969        &self,
13970        buffer: &Model<Buffer>,
13971        position: text::Anchor,
13972        new_name: String,
13973        cx: &mut AppContext,
13974    ) -> Option<Task<Result<ProjectTransaction>>> {
13975        Some(self.update(cx, |project, cx| {
13976            project.perform_rename(buffer.clone(), position, new_name, cx)
13977        }))
13978    }
13979}
13980
13981fn inlay_hint_settings(
13982    location: Anchor,
13983    snapshot: &MultiBufferSnapshot,
13984    cx: &mut ViewContext<'_, Editor>,
13985) -> InlayHintSettings {
13986    let file = snapshot.file_at(location);
13987    let language = snapshot.language_at(location).map(|l| l.name());
13988    language_settings(language, file, cx).inlay_hints
13989}
13990
13991fn consume_contiguous_rows(
13992    contiguous_row_selections: &mut Vec<Selection<Point>>,
13993    selection: &Selection<Point>,
13994    display_map: &DisplaySnapshot,
13995    selections: &mut Peekable<std::slice::Iter<Selection<Point>>>,
13996) -> (MultiBufferRow, MultiBufferRow) {
13997    contiguous_row_selections.push(selection.clone());
13998    let start_row = MultiBufferRow(selection.start.row);
13999    let mut end_row = ending_row(selection, display_map);
14000
14001    while let Some(next_selection) = selections.peek() {
14002        if next_selection.start.row <= end_row.0 {
14003            end_row = ending_row(next_selection, display_map);
14004            contiguous_row_selections.push(selections.next().unwrap().clone());
14005        } else {
14006            break;
14007        }
14008    }
14009    (start_row, end_row)
14010}
14011
14012fn ending_row(next_selection: &Selection<Point>, display_map: &DisplaySnapshot) -> MultiBufferRow {
14013    if next_selection.end.column > 0 || next_selection.is_empty() {
14014        MultiBufferRow(display_map.next_line_boundary(next_selection.end).0.row + 1)
14015    } else {
14016        MultiBufferRow(next_selection.end.row)
14017    }
14018}
14019
14020impl EditorSnapshot {
14021    pub fn remote_selections_in_range<'a>(
14022        &'a self,
14023        range: &'a Range<Anchor>,
14024        collaboration_hub: &dyn CollaborationHub,
14025        cx: &'a AppContext,
14026    ) -> impl 'a + Iterator<Item = RemoteSelection> {
14027        let participant_names = collaboration_hub.user_names(cx);
14028        let participant_indices = collaboration_hub.user_participant_indices(cx);
14029        let collaborators_by_peer_id = collaboration_hub.collaborators(cx);
14030        let collaborators_by_replica_id = collaborators_by_peer_id
14031            .iter()
14032            .map(|(_, collaborator)| (collaborator.replica_id, collaborator))
14033            .collect::<HashMap<_, _>>();
14034        self.buffer_snapshot
14035            .selections_in_range(range, false)
14036            .filter_map(move |(replica_id, line_mode, cursor_shape, selection)| {
14037                let collaborator = collaborators_by_replica_id.get(&replica_id)?;
14038                let participant_index = participant_indices.get(&collaborator.user_id).copied();
14039                let user_name = participant_names.get(&collaborator.user_id).cloned();
14040                Some(RemoteSelection {
14041                    replica_id,
14042                    selection,
14043                    cursor_shape,
14044                    line_mode,
14045                    participant_index,
14046                    peer_id: collaborator.peer_id,
14047                    user_name,
14048                })
14049            })
14050    }
14051
14052    pub fn language_at<T: ToOffset>(&self, position: T) -> Option<&Arc<Language>> {
14053        self.display_snapshot.buffer_snapshot.language_at(position)
14054    }
14055
14056    pub fn is_focused(&self) -> bool {
14057        self.is_focused
14058    }
14059
14060    pub fn placeholder_text(&self) -> Option<&Arc<str>> {
14061        self.placeholder_text.as_ref()
14062    }
14063
14064    pub fn scroll_position(&self) -> gpui::Point<f32> {
14065        self.scroll_anchor.scroll_position(&self.display_snapshot)
14066    }
14067
14068    fn gutter_dimensions(
14069        &self,
14070        font_id: FontId,
14071        font_size: Pixels,
14072        em_width: Pixels,
14073        em_advance: Pixels,
14074        max_line_number_width: Pixels,
14075        cx: &AppContext,
14076    ) -> GutterDimensions {
14077        if !self.show_gutter {
14078            return GutterDimensions::default();
14079        }
14080        let descent = cx.text_system().descent(font_id, font_size);
14081
14082        let show_git_gutter = self.show_git_diff_gutter.unwrap_or_else(|| {
14083            matches!(
14084                ProjectSettings::get_global(cx).git.git_gutter,
14085                Some(GitGutterSetting::TrackedFiles)
14086            )
14087        });
14088        let gutter_settings = EditorSettings::get_global(cx).gutter;
14089        let show_line_numbers = self
14090            .show_line_numbers
14091            .unwrap_or(gutter_settings.line_numbers);
14092        let line_gutter_width = if show_line_numbers {
14093            // Avoid flicker-like gutter resizes when the line number gains another digit and only resize the gutter on files with N*10^5 lines.
14094            let min_width_for_number_on_gutter = em_advance * 4.0;
14095            max_line_number_width.max(min_width_for_number_on_gutter)
14096        } else {
14097            0.0.into()
14098        };
14099
14100        let show_code_actions = self
14101            .show_code_actions
14102            .unwrap_or(gutter_settings.code_actions);
14103
14104        let show_runnables = self.show_runnables.unwrap_or(gutter_settings.runnables);
14105
14106        let git_blame_entries_width =
14107            self.git_blame_gutter_max_author_length
14108                .map(|max_author_length| {
14109                    // Length of the author name, but also space for the commit hash,
14110                    // the spacing and the timestamp.
14111                    let max_char_count = max_author_length
14112                        .min(GIT_BLAME_MAX_AUTHOR_CHARS_DISPLAYED)
14113                        + 7 // length of commit sha
14114                        + 14 // length of max relative timestamp ("60 minutes ago")
14115                        + 4; // gaps and margins
14116
14117                    em_advance * max_char_count
14118                });
14119
14120        let mut left_padding = git_blame_entries_width.unwrap_or(Pixels::ZERO);
14121        left_padding += if show_code_actions || show_runnables {
14122            em_width * 3.0
14123        } else if show_git_gutter && show_line_numbers {
14124            em_width * 2.0
14125        } else if show_git_gutter || show_line_numbers {
14126            em_width
14127        } else {
14128            px(0.)
14129        };
14130
14131        let right_padding = if gutter_settings.folds && show_line_numbers {
14132            em_width * 4.0
14133        } else if gutter_settings.folds {
14134            em_width * 3.0
14135        } else if show_line_numbers {
14136            em_width
14137        } else {
14138            px(0.)
14139        };
14140
14141        GutterDimensions {
14142            left_padding,
14143            right_padding,
14144            width: line_gutter_width + left_padding + right_padding,
14145            margin: -descent,
14146            git_blame_entries_width,
14147        }
14148    }
14149
14150    pub fn render_crease_toggle(
14151        &self,
14152        buffer_row: MultiBufferRow,
14153        row_contains_cursor: bool,
14154        editor: View<Editor>,
14155        cx: &mut WindowContext,
14156    ) -> Option<AnyElement> {
14157        let folded = self.is_line_folded(buffer_row);
14158        let mut is_foldable = false;
14159
14160        if let Some(crease) = self
14161            .crease_snapshot
14162            .query_row(buffer_row, &self.buffer_snapshot)
14163        {
14164            is_foldable = true;
14165            match crease {
14166                Crease::Inline { render_toggle, .. } | Crease::Block { render_toggle, .. } => {
14167                    if let Some(render_toggle) = render_toggle {
14168                        let toggle_callback = Arc::new(move |folded, cx: &mut WindowContext| {
14169                            if folded {
14170                                editor.update(cx, |editor, cx| {
14171                                    editor.fold_at(&crate::FoldAt { buffer_row }, cx)
14172                                });
14173                            } else {
14174                                editor.update(cx, |editor, cx| {
14175                                    editor.unfold_at(&crate::UnfoldAt { buffer_row }, cx)
14176                                });
14177                            }
14178                        });
14179                        return Some((render_toggle)(buffer_row, folded, toggle_callback, cx));
14180                    }
14181                }
14182            }
14183        }
14184
14185        is_foldable |= self.starts_indent(buffer_row);
14186
14187        if folded || (is_foldable && (row_contains_cursor || self.gutter_hovered)) {
14188            Some(
14189                Disclosure::new(("gutter_crease", buffer_row.0), !folded)
14190                    .selected(folded)
14191                    .on_click(cx.listener_for(&editor, move |this, _e, cx| {
14192                        if folded {
14193                            this.unfold_at(&UnfoldAt { buffer_row }, cx);
14194                        } else {
14195                            this.fold_at(&FoldAt { buffer_row }, cx);
14196                        }
14197                    }))
14198                    .into_any_element(),
14199            )
14200        } else {
14201            None
14202        }
14203    }
14204
14205    pub fn render_crease_trailer(
14206        &self,
14207        buffer_row: MultiBufferRow,
14208        cx: &mut WindowContext,
14209    ) -> Option<AnyElement> {
14210        let folded = self.is_line_folded(buffer_row);
14211        if let Crease::Inline { render_trailer, .. } = self
14212            .crease_snapshot
14213            .query_row(buffer_row, &self.buffer_snapshot)?
14214        {
14215            let render_trailer = render_trailer.as_ref()?;
14216            Some(render_trailer(buffer_row, folded, cx))
14217        } else {
14218            None
14219        }
14220    }
14221}
14222
14223impl Deref for EditorSnapshot {
14224    type Target = DisplaySnapshot;
14225
14226    fn deref(&self) -> &Self::Target {
14227        &self.display_snapshot
14228    }
14229}
14230
14231#[derive(Clone, Debug, PartialEq, Eq)]
14232pub enum EditorEvent {
14233    InputIgnored {
14234        text: Arc<str>,
14235    },
14236    InputHandled {
14237        utf16_range_to_replace: Option<Range<isize>>,
14238        text: Arc<str>,
14239    },
14240    ExcerptsAdded {
14241        buffer: Model<Buffer>,
14242        predecessor: ExcerptId,
14243        excerpts: Vec<(ExcerptId, ExcerptRange<language::Anchor>)>,
14244    },
14245    ExcerptsRemoved {
14246        ids: Vec<ExcerptId>,
14247    },
14248    ExcerptsEdited {
14249        ids: Vec<ExcerptId>,
14250    },
14251    ExcerptsExpanded {
14252        ids: Vec<ExcerptId>,
14253    },
14254    BufferEdited,
14255    Edited {
14256        transaction_id: clock::Lamport,
14257    },
14258    Reparsed(BufferId),
14259    Focused,
14260    FocusedIn,
14261    Blurred,
14262    DirtyChanged,
14263    Saved,
14264    TitleChanged,
14265    DiffBaseChanged,
14266    SelectionsChanged {
14267        local: bool,
14268    },
14269    ScrollPositionChanged {
14270        local: bool,
14271        autoscroll: bool,
14272    },
14273    Closed,
14274    TransactionUndone {
14275        transaction_id: clock::Lamport,
14276    },
14277    TransactionBegun {
14278        transaction_id: clock::Lamport,
14279    },
14280    Reloaded,
14281    CursorShapeChanged,
14282}
14283
14284impl EventEmitter<EditorEvent> for Editor {}
14285
14286impl FocusableView for Editor {
14287    fn focus_handle(&self, _cx: &AppContext) -> FocusHandle {
14288        self.focus_handle.clone()
14289    }
14290}
14291
14292impl Render for Editor {
14293    fn render<'a>(&mut self, cx: &mut ViewContext<'a, Self>) -> impl IntoElement {
14294        let settings = ThemeSettings::get_global(cx);
14295
14296        let mut text_style = match self.mode {
14297            EditorMode::SingleLine { .. } | EditorMode::AutoHeight { .. } => TextStyle {
14298                color: cx.theme().colors().editor_foreground,
14299                font_family: settings.ui_font.family.clone(),
14300                font_features: settings.ui_font.features.clone(),
14301                font_fallbacks: settings.ui_font.fallbacks.clone(),
14302                font_size: rems(0.875).into(),
14303                font_weight: settings.ui_font.weight,
14304                line_height: relative(settings.buffer_line_height.value()),
14305                ..Default::default()
14306            },
14307            EditorMode::Full => TextStyle {
14308                color: cx.theme().colors().editor_foreground,
14309                font_family: settings.buffer_font.family.clone(),
14310                font_features: settings.buffer_font.features.clone(),
14311                font_fallbacks: settings.buffer_font.fallbacks.clone(),
14312                font_size: settings.buffer_font_size(cx).into(),
14313                font_weight: settings.buffer_font.weight,
14314                line_height: relative(settings.buffer_line_height.value()),
14315                ..Default::default()
14316            },
14317        };
14318        if let Some(text_style_refinement) = &self.text_style_refinement {
14319            text_style.refine(text_style_refinement)
14320        }
14321
14322        let background = match self.mode {
14323            EditorMode::SingleLine { .. } => cx.theme().system().transparent,
14324            EditorMode::AutoHeight { max_lines: _ } => cx.theme().system().transparent,
14325            EditorMode::Full => cx.theme().colors().editor_background,
14326        };
14327
14328        EditorElement::new(
14329            cx.view(),
14330            EditorStyle {
14331                background,
14332                local_player: cx.theme().players().local(),
14333                text: text_style,
14334                scrollbar_width: EditorElement::SCROLLBAR_WIDTH,
14335                syntax: cx.theme().syntax().clone(),
14336                status: cx.theme().status().clone(),
14337                inlay_hints_style: make_inlay_hints_style(cx),
14338                suggestions_style: HighlightStyle {
14339                    color: Some(cx.theme().status().predictive),
14340                    ..HighlightStyle::default()
14341                },
14342                unnecessary_code_fade: ThemeSettings::get_global(cx).unnecessary_code_fade,
14343            },
14344        )
14345    }
14346}
14347
14348impl ViewInputHandler for Editor {
14349    fn text_for_range(
14350        &mut self,
14351        range_utf16: Range<usize>,
14352        adjusted_range: &mut Option<Range<usize>>,
14353        cx: &mut ViewContext<Self>,
14354    ) -> Option<String> {
14355        let snapshot = self.buffer.read(cx).read(cx);
14356        let start = snapshot.clip_offset_utf16(OffsetUtf16(range_utf16.start), Bias::Left);
14357        let end = snapshot.clip_offset_utf16(OffsetUtf16(range_utf16.end), Bias::Right);
14358        if (start.0..end.0) != range_utf16 {
14359            adjusted_range.replace(start.0..end.0);
14360        }
14361        Some(snapshot.text_for_range(start..end).collect())
14362    }
14363
14364    fn selected_text_range(
14365        &mut self,
14366        ignore_disabled_input: bool,
14367        cx: &mut ViewContext<Self>,
14368    ) -> Option<UTF16Selection> {
14369        // Prevent the IME menu from appearing when holding down an alphabetic key
14370        // while input is disabled.
14371        if !ignore_disabled_input && !self.input_enabled {
14372            return None;
14373        }
14374
14375        let selection = self.selections.newest::<OffsetUtf16>(cx);
14376        let range = selection.range();
14377
14378        Some(UTF16Selection {
14379            range: range.start.0..range.end.0,
14380            reversed: selection.reversed,
14381        })
14382    }
14383
14384    fn marked_text_range(&self, cx: &mut ViewContext<Self>) -> Option<Range<usize>> {
14385        let snapshot = self.buffer.read(cx).read(cx);
14386        let range = self.text_highlights::<InputComposition>(cx)?.1.first()?;
14387        Some(range.start.to_offset_utf16(&snapshot).0..range.end.to_offset_utf16(&snapshot).0)
14388    }
14389
14390    fn unmark_text(&mut self, cx: &mut ViewContext<Self>) {
14391        self.clear_highlights::<InputComposition>(cx);
14392        self.ime_transaction.take();
14393    }
14394
14395    fn replace_text_in_range(
14396        &mut self,
14397        range_utf16: Option<Range<usize>>,
14398        text: &str,
14399        cx: &mut ViewContext<Self>,
14400    ) {
14401        if !self.input_enabled {
14402            cx.emit(EditorEvent::InputIgnored { text: text.into() });
14403            return;
14404        }
14405
14406        self.transact(cx, |this, cx| {
14407            let new_selected_ranges = if let Some(range_utf16) = range_utf16 {
14408                let range_utf16 = OffsetUtf16(range_utf16.start)..OffsetUtf16(range_utf16.end);
14409                Some(this.selection_replacement_ranges(range_utf16, cx))
14410            } else {
14411                this.marked_text_ranges(cx)
14412            };
14413
14414            let range_to_replace = new_selected_ranges.as_ref().and_then(|ranges_to_replace| {
14415                let newest_selection_id = this.selections.newest_anchor().id;
14416                this.selections
14417                    .all::<OffsetUtf16>(cx)
14418                    .iter()
14419                    .zip(ranges_to_replace.iter())
14420                    .find_map(|(selection, range)| {
14421                        if selection.id == newest_selection_id {
14422                            Some(
14423                                (range.start.0 as isize - selection.head().0 as isize)
14424                                    ..(range.end.0 as isize - selection.head().0 as isize),
14425                            )
14426                        } else {
14427                            None
14428                        }
14429                    })
14430            });
14431
14432            cx.emit(EditorEvent::InputHandled {
14433                utf16_range_to_replace: range_to_replace,
14434                text: text.into(),
14435            });
14436
14437            if let Some(new_selected_ranges) = new_selected_ranges {
14438                this.change_selections(None, cx, |selections| {
14439                    selections.select_ranges(new_selected_ranges)
14440                });
14441                this.backspace(&Default::default(), cx);
14442            }
14443
14444            this.handle_input(text, cx);
14445        });
14446
14447        if let Some(transaction) = self.ime_transaction {
14448            self.buffer.update(cx, |buffer, cx| {
14449                buffer.group_until_transaction(transaction, cx);
14450            });
14451        }
14452
14453        self.unmark_text(cx);
14454    }
14455
14456    fn replace_and_mark_text_in_range(
14457        &mut self,
14458        range_utf16: Option<Range<usize>>,
14459        text: &str,
14460        new_selected_range_utf16: Option<Range<usize>>,
14461        cx: &mut ViewContext<Self>,
14462    ) {
14463        if !self.input_enabled {
14464            return;
14465        }
14466
14467        let transaction = self.transact(cx, |this, cx| {
14468            let ranges_to_replace = if let Some(mut marked_ranges) = this.marked_text_ranges(cx) {
14469                let snapshot = this.buffer.read(cx).read(cx);
14470                if let Some(relative_range_utf16) = range_utf16.as_ref() {
14471                    for marked_range in &mut marked_ranges {
14472                        marked_range.end.0 = marked_range.start.0 + relative_range_utf16.end;
14473                        marked_range.start.0 += relative_range_utf16.start;
14474                        marked_range.start =
14475                            snapshot.clip_offset_utf16(marked_range.start, Bias::Left);
14476                        marked_range.end =
14477                            snapshot.clip_offset_utf16(marked_range.end, Bias::Right);
14478                    }
14479                }
14480                Some(marked_ranges)
14481            } else if let Some(range_utf16) = range_utf16 {
14482                let range_utf16 = OffsetUtf16(range_utf16.start)..OffsetUtf16(range_utf16.end);
14483                Some(this.selection_replacement_ranges(range_utf16, cx))
14484            } else {
14485                None
14486            };
14487
14488            let range_to_replace = ranges_to_replace.as_ref().and_then(|ranges_to_replace| {
14489                let newest_selection_id = this.selections.newest_anchor().id;
14490                this.selections
14491                    .all::<OffsetUtf16>(cx)
14492                    .iter()
14493                    .zip(ranges_to_replace.iter())
14494                    .find_map(|(selection, range)| {
14495                        if selection.id == newest_selection_id {
14496                            Some(
14497                                (range.start.0 as isize - selection.head().0 as isize)
14498                                    ..(range.end.0 as isize - selection.head().0 as isize),
14499                            )
14500                        } else {
14501                            None
14502                        }
14503                    })
14504            });
14505
14506            cx.emit(EditorEvent::InputHandled {
14507                utf16_range_to_replace: range_to_replace,
14508                text: text.into(),
14509            });
14510
14511            if let Some(ranges) = ranges_to_replace {
14512                this.change_selections(None, cx, |s| s.select_ranges(ranges));
14513            }
14514
14515            let marked_ranges = {
14516                let snapshot = this.buffer.read(cx).read(cx);
14517                this.selections
14518                    .disjoint_anchors()
14519                    .iter()
14520                    .map(|selection| {
14521                        selection.start.bias_left(&snapshot)..selection.end.bias_right(&snapshot)
14522                    })
14523                    .collect::<Vec<_>>()
14524            };
14525
14526            if text.is_empty() {
14527                this.unmark_text(cx);
14528            } else {
14529                this.highlight_text::<InputComposition>(
14530                    marked_ranges.clone(),
14531                    HighlightStyle {
14532                        underline: Some(UnderlineStyle {
14533                            thickness: px(1.),
14534                            color: None,
14535                            wavy: false,
14536                        }),
14537                        ..Default::default()
14538                    },
14539                    cx,
14540                );
14541            }
14542
14543            // Disable auto-closing when composing text (i.e. typing a `"` on a Brazilian keyboard)
14544            let use_autoclose = this.use_autoclose;
14545            let use_auto_surround = this.use_auto_surround;
14546            this.set_use_autoclose(false);
14547            this.set_use_auto_surround(false);
14548            this.handle_input(text, cx);
14549            this.set_use_autoclose(use_autoclose);
14550            this.set_use_auto_surround(use_auto_surround);
14551
14552            if let Some(new_selected_range) = new_selected_range_utf16 {
14553                let snapshot = this.buffer.read(cx).read(cx);
14554                let new_selected_ranges = marked_ranges
14555                    .into_iter()
14556                    .map(|marked_range| {
14557                        let insertion_start = marked_range.start.to_offset_utf16(&snapshot).0;
14558                        let new_start = OffsetUtf16(new_selected_range.start + insertion_start);
14559                        let new_end = OffsetUtf16(new_selected_range.end + insertion_start);
14560                        snapshot.clip_offset_utf16(new_start, Bias::Left)
14561                            ..snapshot.clip_offset_utf16(new_end, Bias::Right)
14562                    })
14563                    .collect::<Vec<_>>();
14564
14565                drop(snapshot);
14566                this.change_selections(None, cx, |selections| {
14567                    selections.select_ranges(new_selected_ranges)
14568                });
14569            }
14570        });
14571
14572        self.ime_transaction = self.ime_transaction.or(transaction);
14573        if let Some(transaction) = self.ime_transaction {
14574            self.buffer.update(cx, |buffer, cx| {
14575                buffer.group_until_transaction(transaction, cx);
14576            });
14577        }
14578
14579        if self.text_highlights::<InputComposition>(cx).is_none() {
14580            self.ime_transaction.take();
14581        }
14582    }
14583
14584    fn bounds_for_range(
14585        &mut self,
14586        range_utf16: Range<usize>,
14587        element_bounds: gpui::Bounds<Pixels>,
14588        cx: &mut ViewContext<Self>,
14589    ) -> Option<gpui::Bounds<Pixels>> {
14590        let text_layout_details = self.text_layout_details(cx);
14591        let style = &text_layout_details.editor_style;
14592        let font_id = cx.text_system().resolve_font(&style.text.font());
14593        let font_size = style.text.font_size.to_pixels(cx.rem_size());
14594        let line_height = style.text.line_height_in_pixels(cx.rem_size());
14595
14596        let em_width = cx
14597            .text_system()
14598            .typographic_bounds(font_id, font_size, 'm')
14599            .unwrap()
14600            .size
14601            .width;
14602
14603        let snapshot = self.snapshot(cx);
14604        let scroll_position = snapshot.scroll_position();
14605        let scroll_left = scroll_position.x * em_width;
14606
14607        let start = OffsetUtf16(range_utf16.start).to_display_point(&snapshot);
14608        let x = snapshot.x_for_display_point(start, &text_layout_details) - scroll_left
14609            + self.gutter_dimensions.width;
14610        let y = line_height * (start.row().as_f32() - scroll_position.y);
14611
14612        Some(Bounds {
14613            origin: element_bounds.origin + point(x, y),
14614            size: size(em_width, line_height),
14615        })
14616    }
14617}
14618
14619trait SelectionExt {
14620    fn display_range(&self, map: &DisplaySnapshot) -> Range<DisplayPoint>;
14621    fn spanned_rows(
14622        &self,
14623        include_end_if_at_line_start: bool,
14624        map: &DisplaySnapshot,
14625    ) -> Range<MultiBufferRow>;
14626}
14627
14628impl<T: ToPoint + ToOffset> SelectionExt for Selection<T> {
14629    fn display_range(&self, map: &DisplaySnapshot) -> Range<DisplayPoint> {
14630        let start = self
14631            .start
14632            .to_point(&map.buffer_snapshot)
14633            .to_display_point(map);
14634        let end = self
14635            .end
14636            .to_point(&map.buffer_snapshot)
14637            .to_display_point(map);
14638        if self.reversed {
14639            end..start
14640        } else {
14641            start..end
14642        }
14643    }
14644
14645    fn spanned_rows(
14646        &self,
14647        include_end_if_at_line_start: bool,
14648        map: &DisplaySnapshot,
14649    ) -> Range<MultiBufferRow> {
14650        let start = self.start.to_point(&map.buffer_snapshot);
14651        let mut end = self.end.to_point(&map.buffer_snapshot);
14652        if !include_end_if_at_line_start && start.row != end.row && end.column == 0 {
14653            end.row -= 1;
14654        }
14655
14656        let buffer_start = map.prev_line_boundary(start).0;
14657        let buffer_end = map.next_line_boundary(end).0;
14658        MultiBufferRow(buffer_start.row)..MultiBufferRow(buffer_end.row + 1)
14659    }
14660}
14661
14662impl<T: InvalidationRegion> InvalidationStack<T> {
14663    fn invalidate<S>(&mut self, selections: &[Selection<S>], buffer: &MultiBufferSnapshot)
14664    where
14665        S: Clone + ToOffset,
14666    {
14667        while let Some(region) = self.last() {
14668            let all_selections_inside_invalidation_ranges =
14669                if selections.len() == region.ranges().len() {
14670                    selections
14671                        .iter()
14672                        .zip(region.ranges().iter().map(|r| r.to_offset(buffer)))
14673                        .all(|(selection, invalidation_range)| {
14674                            let head = selection.head().to_offset(buffer);
14675                            invalidation_range.start <= head && invalidation_range.end >= head
14676                        })
14677                } else {
14678                    false
14679                };
14680
14681            if all_selections_inside_invalidation_ranges {
14682                break;
14683            } else {
14684                self.pop();
14685            }
14686        }
14687    }
14688}
14689
14690impl<T> Default for InvalidationStack<T> {
14691    fn default() -> Self {
14692        Self(Default::default())
14693    }
14694}
14695
14696impl<T> Deref for InvalidationStack<T> {
14697    type Target = Vec<T>;
14698
14699    fn deref(&self) -> &Self::Target {
14700        &self.0
14701    }
14702}
14703
14704impl<T> DerefMut for InvalidationStack<T> {
14705    fn deref_mut(&mut self) -> &mut Self::Target {
14706        &mut self.0
14707    }
14708}
14709
14710impl InvalidationRegion for SnippetState {
14711    fn ranges(&self) -> &[Range<Anchor>] {
14712        &self.ranges[self.active_index]
14713    }
14714}
14715
14716pub fn diagnostic_block_renderer(
14717    diagnostic: Diagnostic,
14718    max_message_rows: Option<u8>,
14719    allow_closing: bool,
14720    _is_valid: bool,
14721) -> RenderBlock {
14722    let (text_without_backticks, code_ranges) =
14723        highlight_diagnostic_message(&diagnostic, max_message_rows);
14724
14725    Arc::new(move |cx: &mut BlockContext| {
14726        let group_id: SharedString = cx.block_id.to_string().into();
14727
14728        let mut text_style = cx.text_style().clone();
14729        text_style.color = diagnostic_style(diagnostic.severity, cx.theme().status());
14730        let theme_settings = ThemeSettings::get_global(cx);
14731        text_style.font_family = theme_settings.buffer_font.family.clone();
14732        text_style.font_style = theme_settings.buffer_font.style;
14733        text_style.font_features = theme_settings.buffer_font.features.clone();
14734        text_style.font_weight = theme_settings.buffer_font.weight;
14735
14736        let multi_line_diagnostic = diagnostic.message.contains('\n');
14737
14738        let buttons = |diagnostic: &Diagnostic| {
14739            if multi_line_diagnostic {
14740                v_flex()
14741            } else {
14742                h_flex()
14743            }
14744            .when(allow_closing, |div| {
14745                div.children(diagnostic.is_primary.then(|| {
14746                    IconButton::new("close-block", IconName::XCircle)
14747                        .icon_color(Color::Muted)
14748                        .size(ButtonSize::Compact)
14749                        .style(ButtonStyle::Transparent)
14750                        .visible_on_hover(group_id.clone())
14751                        .on_click(move |_click, cx| cx.dispatch_action(Box::new(Cancel)))
14752                        .tooltip(|cx| Tooltip::for_action("Close Diagnostics", &Cancel, cx))
14753                }))
14754            })
14755            .child(
14756                IconButton::new("copy-block", IconName::Copy)
14757                    .icon_color(Color::Muted)
14758                    .size(ButtonSize::Compact)
14759                    .style(ButtonStyle::Transparent)
14760                    .visible_on_hover(group_id.clone())
14761                    .on_click({
14762                        let message = diagnostic.message.clone();
14763                        move |_click, cx| {
14764                            cx.write_to_clipboard(ClipboardItem::new_string(message.clone()))
14765                        }
14766                    })
14767                    .tooltip(|cx| Tooltip::text("Copy diagnostic message", cx)),
14768            )
14769        };
14770
14771        let icon_size = buttons(&diagnostic)
14772            .into_any_element()
14773            .layout_as_root(AvailableSpace::min_size(), cx);
14774
14775        h_flex()
14776            .id(cx.block_id)
14777            .group(group_id.clone())
14778            .relative()
14779            .size_full()
14780            .block_mouse_down()
14781            .pl(cx.gutter_dimensions.width)
14782            .w(cx.max_width - cx.gutter_dimensions.full_width())
14783            .child(
14784                div()
14785                    .flex()
14786                    .w(cx.anchor_x - cx.gutter_dimensions.width - icon_size.width)
14787                    .flex_shrink(),
14788            )
14789            .child(buttons(&diagnostic))
14790            .child(div().flex().flex_shrink_0().child(
14791                StyledText::new(text_without_backticks.clone()).with_highlights(
14792                    &text_style,
14793                    code_ranges.iter().map(|range| {
14794                        (
14795                            range.clone(),
14796                            HighlightStyle {
14797                                font_weight: Some(FontWeight::BOLD),
14798                                ..Default::default()
14799                            },
14800                        )
14801                    }),
14802                ),
14803            ))
14804            .into_any_element()
14805    })
14806}
14807
14808pub fn highlight_diagnostic_message(
14809    diagnostic: &Diagnostic,
14810    mut max_message_rows: Option<u8>,
14811) -> (SharedString, Vec<Range<usize>>) {
14812    let mut text_without_backticks = String::new();
14813    let mut code_ranges = Vec::new();
14814
14815    if let Some(source) = &diagnostic.source {
14816        text_without_backticks.push_str(source);
14817        code_ranges.push(0..source.len());
14818        text_without_backticks.push_str(": ");
14819    }
14820
14821    let mut prev_offset = 0;
14822    let mut in_code_block = false;
14823    let has_row_limit = max_message_rows.is_some();
14824    let mut newline_indices = diagnostic
14825        .message
14826        .match_indices('\n')
14827        .filter(|_| has_row_limit)
14828        .map(|(ix, _)| ix)
14829        .fuse()
14830        .peekable();
14831
14832    for (quote_ix, _) in diagnostic
14833        .message
14834        .match_indices('`')
14835        .chain([(diagnostic.message.len(), "")])
14836    {
14837        let mut first_newline_ix = None;
14838        let mut last_newline_ix = None;
14839        while let Some(newline_ix) = newline_indices.peek() {
14840            if *newline_ix < quote_ix {
14841                if first_newline_ix.is_none() {
14842                    first_newline_ix = Some(*newline_ix);
14843                }
14844                last_newline_ix = Some(*newline_ix);
14845
14846                if let Some(rows_left) = &mut max_message_rows {
14847                    if *rows_left == 0 {
14848                        break;
14849                    } else {
14850                        *rows_left -= 1;
14851                    }
14852                }
14853                let _ = newline_indices.next();
14854            } else {
14855                break;
14856            }
14857        }
14858        let prev_len = text_without_backticks.len();
14859        let new_text = &diagnostic.message[prev_offset..first_newline_ix.unwrap_or(quote_ix)];
14860        text_without_backticks.push_str(new_text);
14861        if in_code_block {
14862            code_ranges.push(prev_len..text_without_backticks.len());
14863        }
14864        prev_offset = last_newline_ix.unwrap_or(quote_ix) + 1;
14865        in_code_block = !in_code_block;
14866        if first_newline_ix.map_or(false, |newline_ix| newline_ix < quote_ix) {
14867            text_without_backticks.push_str("...");
14868            break;
14869        }
14870    }
14871
14872    (text_without_backticks.into(), code_ranges)
14873}
14874
14875fn diagnostic_style(severity: DiagnosticSeverity, colors: &StatusColors) -> Hsla {
14876    match severity {
14877        DiagnosticSeverity::ERROR => colors.error,
14878        DiagnosticSeverity::WARNING => colors.warning,
14879        DiagnosticSeverity::INFORMATION => colors.info,
14880        DiagnosticSeverity::HINT => colors.info,
14881        _ => colors.ignored,
14882    }
14883}
14884
14885pub fn styled_runs_for_code_label<'a>(
14886    label: &'a CodeLabel,
14887    syntax_theme: &'a theme::SyntaxTheme,
14888) -> impl 'a + Iterator<Item = (Range<usize>, HighlightStyle)> {
14889    let fade_out = HighlightStyle {
14890        fade_out: Some(0.35),
14891        ..Default::default()
14892    };
14893
14894    let mut prev_end = label.filter_range.end;
14895    label
14896        .runs
14897        .iter()
14898        .enumerate()
14899        .flat_map(move |(ix, (range, highlight_id))| {
14900            let style = if let Some(style) = highlight_id.style(syntax_theme) {
14901                style
14902            } else {
14903                return Default::default();
14904            };
14905            let mut muted_style = style;
14906            muted_style.highlight(fade_out);
14907
14908            let mut runs = SmallVec::<[(Range<usize>, HighlightStyle); 3]>::new();
14909            if range.start >= label.filter_range.end {
14910                if range.start > prev_end {
14911                    runs.push((prev_end..range.start, fade_out));
14912                }
14913                runs.push((range.clone(), muted_style));
14914            } else if range.end <= label.filter_range.end {
14915                runs.push((range.clone(), style));
14916            } else {
14917                runs.push((range.start..label.filter_range.end, style));
14918                runs.push((label.filter_range.end..range.end, muted_style));
14919            }
14920            prev_end = cmp::max(prev_end, range.end);
14921
14922            if ix + 1 == label.runs.len() && label.text.len() > prev_end {
14923                runs.push((prev_end..label.text.len(), fade_out));
14924            }
14925
14926            runs
14927        })
14928}
14929
14930pub(crate) fn split_words(text: &str) -> impl std::iter::Iterator<Item = &str> + '_ {
14931    let mut prev_index = 0;
14932    let mut prev_codepoint: Option<char> = None;
14933    text.char_indices()
14934        .chain([(text.len(), '\0')])
14935        .filter_map(move |(index, codepoint)| {
14936            let prev_codepoint = prev_codepoint.replace(codepoint)?;
14937            let is_boundary = index == text.len()
14938                || !prev_codepoint.is_uppercase() && codepoint.is_uppercase()
14939                || !prev_codepoint.is_alphanumeric() && codepoint.is_alphanumeric();
14940            if is_boundary {
14941                let chunk = &text[prev_index..index];
14942                prev_index = index;
14943                Some(chunk)
14944            } else {
14945                None
14946            }
14947        })
14948}
14949
14950pub trait RangeToAnchorExt: Sized {
14951    fn to_anchors(self, snapshot: &MultiBufferSnapshot) -> Range<Anchor>;
14952
14953    fn to_display_points(self, snapshot: &EditorSnapshot) -> Range<DisplayPoint> {
14954        let anchor_range = self.to_anchors(&snapshot.buffer_snapshot);
14955        anchor_range.start.to_display_point(snapshot)..anchor_range.end.to_display_point(snapshot)
14956    }
14957}
14958
14959impl<T: ToOffset> RangeToAnchorExt for Range<T> {
14960    fn to_anchors(self, snapshot: &MultiBufferSnapshot) -> Range<Anchor> {
14961        let start_offset = self.start.to_offset(snapshot);
14962        let end_offset = self.end.to_offset(snapshot);
14963        if start_offset == end_offset {
14964            snapshot.anchor_before(start_offset)..snapshot.anchor_before(end_offset)
14965        } else {
14966            snapshot.anchor_after(self.start)..snapshot.anchor_before(self.end)
14967        }
14968    }
14969}
14970
14971pub trait RowExt {
14972    fn as_f32(&self) -> f32;
14973
14974    fn next_row(&self) -> Self;
14975
14976    fn previous_row(&self) -> Self;
14977
14978    fn minus(&self, other: Self) -> u32;
14979}
14980
14981impl RowExt for DisplayRow {
14982    fn as_f32(&self) -> f32 {
14983        self.0 as f32
14984    }
14985
14986    fn next_row(&self) -> Self {
14987        Self(self.0 + 1)
14988    }
14989
14990    fn previous_row(&self) -> Self {
14991        Self(self.0.saturating_sub(1))
14992    }
14993
14994    fn minus(&self, other: Self) -> u32 {
14995        self.0 - other.0
14996    }
14997}
14998
14999impl RowExt for MultiBufferRow {
15000    fn as_f32(&self) -> f32 {
15001        self.0 as f32
15002    }
15003
15004    fn next_row(&self) -> Self {
15005        Self(self.0 + 1)
15006    }
15007
15008    fn previous_row(&self) -> Self {
15009        Self(self.0.saturating_sub(1))
15010    }
15011
15012    fn minus(&self, other: Self) -> u32 {
15013        self.0 - other.0
15014    }
15015}
15016
15017trait RowRangeExt {
15018    type Row;
15019
15020    fn len(&self) -> usize;
15021
15022    fn iter_rows(&self) -> impl DoubleEndedIterator<Item = Self::Row>;
15023}
15024
15025impl RowRangeExt for Range<MultiBufferRow> {
15026    type Row = MultiBufferRow;
15027
15028    fn len(&self) -> usize {
15029        (self.end.0 - self.start.0) as usize
15030    }
15031
15032    fn iter_rows(&self) -> impl DoubleEndedIterator<Item = MultiBufferRow> {
15033        (self.start.0..self.end.0).map(MultiBufferRow)
15034    }
15035}
15036
15037impl RowRangeExt for Range<DisplayRow> {
15038    type Row = DisplayRow;
15039
15040    fn len(&self) -> usize {
15041        (self.end.0 - self.start.0) as usize
15042    }
15043
15044    fn iter_rows(&self) -> impl DoubleEndedIterator<Item = DisplayRow> {
15045        (self.start.0..self.end.0).map(DisplayRow)
15046    }
15047}
15048
15049fn hunk_status(hunk: &MultiBufferDiffHunk) -> DiffHunkStatus {
15050    if hunk.diff_base_byte_range.is_empty() {
15051        DiffHunkStatus::Added
15052    } else if hunk.row_range.is_empty() {
15053        DiffHunkStatus::Removed
15054    } else {
15055        DiffHunkStatus::Modified
15056    }
15057}
15058
15059/// If select range has more than one line, we
15060/// just point the cursor to range.start.
15061fn check_multiline_range(buffer: &Buffer, range: Range<usize>) -> Range<usize> {
15062    if buffer.offset_to_point(range.start).row == buffer.offset_to_point(range.end).row {
15063        range
15064    } else {
15065        range.start..range.start
15066    }
15067}
15068
15069pub struct KillRing(ClipboardItem);
15070impl Global for KillRing {}
15071
15072const UPDATE_DEBOUNCE: Duration = Duration::from_millis(50);