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 behaviour.
   15pub mod actions;
   16mod blame_entry_tooltip;
   17mod blink_manager;
   18mod debounced_delay;
   19pub mod display_map;
   20mod editor_settings;
   21mod element;
   22mod git;
   23mod highlight_matching_bracket;
   24mod hover_links;
   25mod hover_popover;
   26mod hunk_diff;
   27mod indent_guides;
   28mod inlay_hint_cache;
   29mod inline_completion_provider;
   30pub mod items;
   31mod linked_editing_ranges;
   32mod mouse_context_menu;
   33pub mod movement;
   34mod persistence;
   35mod rust_analyzer_ext;
   36pub mod scroll;
   37mod selections_collection;
   38pub mod tasks;
   39
   40#[cfg(test)]
   41mod editor_tests;
   42#[cfg(any(test, feature = "test-support"))]
   43pub mod test;
   44use ::git::diff::{DiffHunk, DiffHunkStatus};
   45use ::git::{parse_git_remote_url, BuildPermalinkParams, GitHostingProviderRegistry};
   46pub(crate) use actions::*;
   47use aho_corasick::AhoCorasick;
   48use anyhow::{anyhow, Context as _, Result};
   49use blink_manager::BlinkManager;
   50use client::{Collaborator, ParticipantIndex};
   51use clock::ReplicaId;
   52use collections::{BTreeMap, Bound, HashMap, HashSet, VecDeque};
   53use convert_case::{Case, Casing};
   54use debounced_delay::DebouncedDelay;
   55use display_map::*;
   56pub use display_map::{DisplayPoint, FoldPlaceholder};
   57pub use editor_settings::{CurrentLineHighlight, EditorSettings};
   58use element::LineWithInvisibles;
   59pub use element::{
   60    CursorLayout, EditorElement, HighlightedRange, HighlightedRangeLine, PointForPosition,
   61};
   62use futures::FutureExt;
   63use fuzzy::{StringMatch, StringMatchCandidate};
   64use git::blame::GitBlame;
   65use git::diff_hunk_to_display;
   66use gpui::{
   67    div, impl_actions, point, prelude::*, px, relative, size, uniform_list, Action, AnyElement,
   68    AppContext, AsyncWindowContext, AvailableSpace, BackgroundExecutor, Bounds, ClipboardItem,
   69    Context, DispatchPhase, ElementId, EventEmitter, FocusHandle, FocusOutEvent, FocusableView,
   70    FontId, FontStyle, FontWeight, HighlightStyle, Hsla, InteractiveText, KeyContext,
   71    ListSizingBehavior, Model, MouseButton, PaintQuad, ParentElement, Pixels, Render, SharedString,
   72    Size, StrikethroughStyle, Styled, StyledText, Subscription, Task, TextStyle, UnderlineStyle,
   73    UniformListScrollHandle, View, ViewContext, ViewInputHandler, VisualContext, WeakFocusHandle,
   74    WeakView, WhiteSpace, WindowContext,
   75};
   76use highlight_matching_bracket::refresh_matching_bracket_highlights;
   77use hover_popover::{hide_hover, HoverState};
   78use hunk_diff::ExpandedHunks;
   79pub(crate) use hunk_diff::HunkToExpand;
   80use indent_guides::ActiveIndentGuidesState;
   81use inlay_hint_cache::{InlayHintCache, InlaySplice, InvalidationStrategy};
   82pub use inline_completion_provider::*;
   83pub use items::MAX_TAB_TITLE_LEN;
   84use itertools::Itertools;
   85use language::{
   86    char_kind,
   87    language_settings::{self, all_language_settings, InlayHintSettings},
   88    markdown, point_from_lsp, AutoindentMode, BracketPair, Buffer, Capability, CharKind, CodeLabel,
   89    CursorShape, Diagnostic, Documentation, IndentKind, IndentSize, Language, OffsetRangeExt,
   90    Point, Selection, SelectionGoal, TransactionId,
   91};
   92use language::{BufferRow, Runnable, RunnableRange};
   93use linked_editing_ranges::refresh_linked_ranges;
   94use task::{ResolvedTask, TaskTemplate, TaskVariables};
   95
   96use hover_links::{HoverLink, HoveredLinkState, InlayHighlight};
   97pub use lsp::CompletionContext;
   98use lsp::{CompletionTriggerKind, DiagnosticSeverity, LanguageServerId};
   99use mouse_context_menu::MouseContextMenu;
  100use movement::TextLayoutDetails;
  101pub use multi_buffer::{
  102    Anchor, AnchorRangeExt, ExcerptId, ExcerptRange, MultiBuffer, MultiBufferSnapshot, ToOffset,
  103    ToPoint,
  104};
  105use multi_buffer::{ExpandExcerptDirection, MultiBufferPoint, MultiBufferRow, ToOffsetUtf16};
  106use ordered_float::OrderedFloat;
  107use parking_lot::{Mutex, RwLock};
  108use project::project_settings::{GitGutterSetting, ProjectSettings};
  109use project::{
  110    CodeAction, Completion, FormatTrigger, Item, Location, Project, ProjectPath,
  111    ProjectTransaction, TaskSourceKind, WorktreeId,
  112};
  113use rand::prelude::*;
  114use rpc::{proto::*, ErrorExt};
  115use scroll::{Autoscroll, OngoingScroll, ScrollAnchor, ScrollManager, ScrollbarAutoHide};
  116use selections_collection::{resolve_multiple, MutableSelectionsCollection, SelectionsCollection};
  117use serde::{Deserialize, Serialize};
  118use settings::{update_settings_file, Settings, SettingsStore};
  119use smallvec::SmallVec;
  120use snippet::Snippet;
  121use std::{
  122    any::TypeId,
  123    borrow::Cow,
  124    cell::RefCell,
  125    cmp::{self, Ordering, Reverse},
  126    mem,
  127    num::NonZeroU32,
  128    ops::{ControlFlow, Deref, DerefMut, Not as _, Range, RangeInclusive},
  129    path::Path,
  130    rc::Rc,
  131    sync::Arc,
  132    time::{Duration, Instant},
  133};
  134pub use sum_tree::Bias;
  135use sum_tree::TreeMap;
  136use text::{BufferId, OffsetUtf16, Rope};
  137use theme::{
  138    observe_buffer_font_size_adjustment, ActiveTheme, PlayerColor, StatusColors, SyntaxTheme,
  139    ThemeColors, ThemeSettings,
  140};
  141use ui::{
  142    h_flex, prelude::*, ButtonSize, ButtonStyle, Disclosure, IconButton, IconName, IconSize,
  143    ListItem, Popover, Tooltip,
  144};
  145use util::{defer, maybe, post_inc, RangeExt, ResultExt, TryFutureExt};
  146use workspace::item::{ItemHandle, PreviewTabsSettings};
  147use workspace::notifications::{DetachAndPromptErr, NotificationId};
  148use workspace::{
  149    searchable::SearchEvent, ItemNavHistory, SplitDirection, ViewId, Workspace, WorkspaceId,
  150};
  151use workspace::{OpenInTerminal, OpenTerminal, TabBarSettings, Toast};
  152
  153use crate::hover_links::find_url;
  154
  155pub const FILE_HEADER_HEIGHT: u8 = 1;
  156pub const MULTI_BUFFER_EXCERPT_HEADER_HEIGHT: u8 = 1;
  157pub const MULTI_BUFFER_EXCERPT_FOOTER_HEIGHT: u8 = 1;
  158pub const DEFAULT_MULTIBUFFER_CONTEXT: u32 = 2;
  159const CURSOR_BLINK_INTERVAL: Duration = Duration::from_millis(500);
  160const MAX_LINE_LEN: usize = 1024;
  161const MIN_NAVIGATION_HISTORY_ROW_DELTA: i64 = 10;
  162const MAX_SELECTION_HISTORY_LEN: usize = 1024;
  163pub(crate) const CURSORS_VISIBLE_FOR: Duration = Duration::from_millis(2000);
  164#[doc(hidden)]
  165pub const CODE_ACTIONS_DEBOUNCE_TIMEOUT: Duration = Duration::from_millis(250);
  166#[doc(hidden)]
  167pub const DOCUMENT_HIGHLIGHTS_DEBOUNCE_TIMEOUT: Duration = Duration::from_millis(75);
  168
  169pub(crate) const FORMAT_TIMEOUT: Duration = Duration::from_secs(2);
  170
  171pub fn render_parsed_markdown(
  172    element_id: impl Into<ElementId>,
  173    parsed: &language::ParsedMarkdown,
  174    editor_style: &EditorStyle,
  175    workspace: Option<WeakView<Workspace>>,
  176    cx: &mut WindowContext,
  177) -> InteractiveText {
  178    let code_span_background_color = cx
  179        .theme()
  180        .colors()
  181        .editor_document_highlight_read_background;
  182
  183    let highlights = gpui::combine_highlights(
  184        parsed.highlights.iter().filter_map(|(range, highlight)| {
  185            let highlight = highlight.to_highlight_style(&editor_style.syntax)?;
  186            Some((range.clone(), highlight))
  187        }),
  188        parsed
  189            .regions
  190            .iter()
  191            .zip(&parsed.region_ranges)
  192            .filter_map(|(region, range)| {
  193                if region.code {
  194                    Some((
  195                        range.clone(),
  196                        HighlightStyle {
  197                            background_color: Some(code_span_background_color),
  198                            ..Default::default()
  199                        },
  200                    ))
  201                } else {
  202                    None
  203                }
  204            }),
  205    );
  206
  207    let mut links = Vec::new();
  208    let mut link_ranges = Vec::new();
  209    for (range, region) in parsed.region_ranges.iter().zip(&parsed.regions) {
  210        if let Some(link) = region.link.clone() {
  211            links.push(link);
  212            link_ranges.push(range.clone());
  213        }
  214    }
  215
  216    InteractiveText::new(
  217        element_id,
  218        StyledText::new(parsed.text.clone()).with_highlights(&editor_style.text, highlights),
  219    )
  220    .on_click(link_ranges, move |clicked_range_ix, cx| {
  221        match &links[clicked_range_ix] {
  222            markdown::Link::Web { url } => cx.open_url(url),
  223            markdown::Link::Path { path } => {
  224                if let Some(workspace) = &workspace {
  225                    _ = workspace.update(cx, |workspace, cx| {
  226                        workspace.open_abs_path(path.clone(), false, cx).detach();
  227                    });
  228                }
  229            }
  230        }
  231    })
  232}
  233
  234#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
  235pub(crate) enum InlayId {
  236    Suggestion(usize),
  237    Hint(usize),
  238}
  239
  240impl InlayId {
  241    fn id(&self) -> usize {
  242        match self {
  243            Self::Suggestion(id) => *id,
  244            Self::Hint(id) => *id,
  245        }
  246    }
  247}
  248
  249enum DiffRowHighlight {}
  250enum DocumentHighlightRead {}
  251enum DocumentHighlightWrite {}
  252enum InputComposition {}
  253
  254#[derive(Copy, Clone, PartialEq, Eq)]
  255pub enum Direction {
  256    Prev,
  257    Next,
  258}
  259
  260pub fn init_settings(cx: &mut AppContext) {
  261    EditorSettings::register(cx);
  262}
  263
  264pub fn init(cx: &mut AppContext) {
  265    init_settings(cx);
  266
  267    workspace::register_project_item::<Editor>(cx);
  268    workspace::register_followable_item::<Editor>(cx);
  269    workspace::register_deserializable_item::<Editor>(cx);
  270    cx.observe_new_views(
  271        |workspace: &mut Workspace, _cx: &mut ViewContext<Workspace>| {
  272            workspace.register_action(Editor::new_file);
  273            workspace.register_action(Editor::new_file_in_direction);
  274        },
  275    )
  276    .detach();
  277
  278    cx.on_action(move |_: &workspace::NewFile, cx| {
  279        let app_state = workspace::AppState::global(cx);
  280        if let Some(app_state) = app_state.upgrade() {
  281            workspace::open_new(app_state, cx, |workspace, cx| {
  282                Editor::new_file(workspace, &Default::default(), cx)
  283            })
  284            .detach();
  285        }
  286    });
  287    cx.on_action(move |_: &workspace::NewWindow, cx| {
  288        let app_state = workspace::AppState::global(cx);
  289        if let Some(app_state) = app_state.upgrade() {
  290            workspace::open_new(app_state, cx, |workspace, cx| {
  291                Editor::new_file(workspace, &Default::default(), cx)
  292            })
  293            .detach();
  294        }
  295    });
  296}
  297
  298pub struct SearchWithinRange;
  299
  300trait InvalidationRegion {
  301    fn ranges(&self) -> &[Range<Anchor>];
  302}
  303
  304#[derive(Clone, Debug, PartialEq)]
  305pub enum SelectPhase {
  306    Begin {
  307        position: DisplayPoint,
  308        add: bool,
  309        click_count: usize,
  310    },
  311    BeginColumnar {
  312        position: DisplayPoint,
  313        reset: bool,
  314        goal_column: u32,
  315    },
  316    Extend {
  317        position: DisplayPoint,
  318        click_count: usize,
  319    },
  320    Update {
  321        position: DisplayPoint,
  322        goal_column: u32,
  323        scroll_delta: gpui::Point<f32>,
  324    },
  325    End,
  326}
  327
  328#[derive(Clone, Debug)]
  329pub enum SelectMode {
  330    Character,
  331    Word(Range<Anchor>),
  332    Line(Range<Anchor>),
  333    All,
  334}
  335
  336#[derive(Copy, Clone, PartialEq, Eq, Debug)]
  337pub enum EditorMode {
  338    SingleLine,
  339    AutoHeight { max_lines: usize },
  340    Full,
  341}
  342
  343#[derive(Clone, Debug)]
  344pub enum SoftWrap {
  345    None,
  346    PreferLine,
  347    EditorWidth,
  348    Column(u32),
  349}
  350
  351#[derive(Clone)]
  352pub struct EditorStyle {
  353    pub background: Hsla,
  354    pub local_player: PlayerColor,
  355    pub text: TextStyle,
  356    pub scrollbar_width: Pixels,
  357    pub syntax: Arc<SyntaxTheme>,
  358    pub status: StatusColors,
  359    pub inlay_hints_style: HighlightStyle,
  360    pub suggestions_style: HighlightStyle,
  361}
  362
  363impl Default for EditorStyle {
  364    fn default() -> Self {
  365        Self {
  366            background: Hsla::default(),
  367            local_player: PlayerColor::default(),
  368            text: TextStyle::default(),
  369            scrollbar_width: Pixels::default(),
  370            syntax: Default::default(),
  371            // HACK: Status colors don't have a real default.
  372            // We should look into removing the status colors from the editor
  373            // style and retrieve them directly from the theme.
  374            status: StatusColors::dark(),
  375            inlay_hints_style: HighlightStyle::default(),
  376            suggestions_style: HighlightStyle::default(),
  377        }
  378    }
  379}
  380
  381type CompletionId = usize;
  382
  383#[derive(Copy, Clone, Eq, PartialEq, PartialOrd, Ord, Debug, Default)]
  384struct EditorActionId(usize);
  385
  386impl EditorActionId {
  387    pub fn post_inc(&mut self) -> Self {
  388        let answer = self.0;
  389
  390        *self = Self(answer + 1);
  391
  392        Self(answer)
  393    }
  394}
  395
  396// type GetFieldEditorTheme = dyn Fn(&theme::Theme) -> theme::FieldEditor;
  397// type OverrideTextStyle = dyn Fn(&EditorStyle) -> Option<HighlightStyle>;
  398
  399type BackgroundHighlight = (fn(&ThemeColors) -> Hsla, Arc<[Range<Anchor>]>);
  400type GutterHighlight = (fn(&AppContext) -> Hsla, Arc<[Range<Anchor>]>);
  401
  402struct ScrollbarMarkerState {
  403    scrollbar_size: Size<Pixels>,
  404    dirty: bool,
  405    markers: Arc<[PaintQuad]>,
  406    pending_refresh: Option<Task<Result<()>>>,
  407}
  408
  409impl ScrollbarMarkerState {
  410    fn should_refresh(&self, scrollbar_size: Size<Pixels>) -> bool {
  411        self.pending_refresh.is_none() && (self.scrollbar_size != scrollbar_size || self.dirty)
  412    }
  413}
  414
  415impl Default for ScrollbarMarkerState {
  416    fn default() -> Self {
  417        Self {
  418            scrollbar_size: Size::default(),
  419            dirty: false,
  420            markers: Arc::from([]),
  421            pending_refresh: None,
  422        }
  423    }
  424}
  425
  426#[derive(Clone, Debug)]
  427struct RunnableTasks {
  428    templates: Vec<(TaskSourceKind, TaskTemplate)>,
  429    offset: MultiBufferOffset,
  430    // We need the column at which the task context evaluation should take place (when we're spawning it via gutter).
  431    column: u32,
  432    // Values of all named captures, including those starting with '_'
  433    extra_variables: HashMap<String, String>,
  434    // Full range of the tagged region. We use it to determine which `extra_variables` to grab for context resolution in e.g. a modal.
  435    context_range: Range<BufferOffset>,
  436}
  437
  438#[derive(Clone)]
  439struct ResolvedTasks {
  440    templates: SmallVec<[(TaskSourceKind, ResolvedTask); 1]>,
  441    position: Anchor,
  442}
  443#[derive(Copy, Clone, Debug)]
  444struct MultiBufferOffset(usize);
  445#[derive(Copy, Clone, Debug, PartialEq, PartialOrd)]
  446struct BufferOffset(usize);
  447/// Zed's primary text input `View`, allowing users to edit a [`MultiBuffer`]
  448///
  449/// See the [module level documentation](self) for more information.
  450pub struct Editor {
  451    focus_handle: FocusHandle,
  452    last_focused_descendant: Option<WeakFocusHandle>,
  453    /// The text buffer being edited
  454    buffer: Model<MultiBuffer>,
  455    /// Map of how text in the buffer should be displayed.
  456    /// Handles soft wraps, folds, fake inlay text insertions, etc.
  457    pub display_map: Model<DisplayMap>,
  458    pub selections: SelectionsCollection,
  459    pub scroll_manager: ScrollManager,
  460    /// When inline assist editors are linked, they all render cursors because
  461    /// typing enters text into each of them, even the ones that aren't focused.
  462    pub(crate) show_cursor_when_unfocused: bool,
  463    columnar_selection_tail: Option<Anchor>,
  464    add_selections_state: Option<AddSelectionsState>,
  465    select_next_state: Option<SelectNextState>,
  466    select_prev_state: Option<SelectNextState>,
  467    selection_history: SelectionHistory,
  468    autoclose_regions: Vec<AutocloseRegion>,
  469    snippet_stack: InvalidationStack<SnippetState>,
  470    select_larger_syntax_node_stack: Vec<Box<[Selection<usize>]>>,
  471    ime_transaction: Option<TransactionId>,
  472    active_diagnostics: Option<ActiveDiagnosticGroup>,
  473    soft_wrap_mode_override: Option<language_settings::SoftWrap>,
  474    project: Option<Model<Project>>,
  475    completion_provider: Option<Box<dyn CompletionProvider>>,
  476    collaboration_hub: Option<Box<dyn CollaborationHub>>,
  477    blink_manager: Model<BlinkManager>,
  478    show_cursor_names: bool,
  479    hovered_cursors: HashMap<HoveredCursor, Task<()>>,
  480    pub show_local_selections: bool,
  481    mode: EditorMode,
  482    show_breadcrumbs: bool,
  483    show_gutter: bool,
  484    show_line_numbers: Option<bool>,
  485    show_git_diff_gutter: Option<bool>,
  486    show_code_actions: Option<bool>,
  487    show_runnables: Option<bool>,
  488    show_wrap_guides: Option<bool>,
  489    show_indent_guides: Option<bool>,
  490    placeholder_text: Option<Arc<str>>,
  491    highlight_order: usize,
  492    highlighted_rows: HashMap<TypeId, Vec<RowHighlight>>,
  493    background_highlights: TreeMap<TypeId, BackgroundHighlight>,
  494    gutter_highlights: TreeMap<TypeId, GutterHighlight>,
  495    scrollbar_marker_state: ScrollbarMarkerState,
  496    active_indent_guides_state: ActiveIndentGuidesState,
  497    nav_history: Option<ItemNavHistory>,
  498    context_menu: RwLock<Option<ContextMenu>>,
  499    mouse_context_menu: Option<MouseContextMenu>,
  500    completion_tasks: Vec<(CompletionId, Task<Option<()>>)>,
  501    find_all_references_task_sources: Vec<Anchor>,
  502    next_completion_id: CompletionId,
  503    completion_documentation_pre_resolve_debounce: DebouncedDelay,
  504    available_code_actions: Option<(Location, Arc<[CodeAction]>)>,
  505    code_actions_task: Option<Task<()>>,
  506    document_highlights_task: Option<Task<()>>,
  507    linked_editing_range_task: Option<Task<Option<()>>>,
  508    linked_edit_ranges: linked_editing_ranges::LinkedEditingRanges,
  509    pending_rename: Option<RenameState>,
  510    searchable: bool,
  511    cursor_shape: CursorShape,
  512    current_line_highlight: Option<CurrentLineHighlight>,
  513    collapse_matches: bool,
  514    autoindent_mode: Option<AutoindentMode>,
  515    workspace: Option<(WeakView<Workspace>, Option<WorkspaceId>)>,
  516    keymap_context_layers: BTreeMap<TypeId, KeyContext>,
  517    input_enabled: bool,
  518    use_modal_editing: bool,
  519    read_only: bool,
  520    leader_peer_id: Option<PeerId>,
  521    remote_id: Option<ViewId>,
  522    hover_state: HoverState,
  523    gutter_hovered: bool,
  524    hovered_link_state: Option<HoveredLinkState>,
  525    inline_completion_provider: Option<RegisteredInlineCompletionProvider>,
  526    active_inline_completion: Option<Inlay>,
  527    show_inline_completions: bool,
  528    inlay_hint_cache: InlayHintCache,
  529    expanded_hunks: ExpandedHunks,
  530    next_inlay_id: usize,
  531    _subscriptions: Vec<Subscription>,
  532    pixel_position_of_newest_cursor: Option<gpui::Point<Pixels>>,
  533    gutter_dimensions: GutterDimensions,
  534    pub vim_replace_map: HashMap<Range<usize>, String>,
  535    style: Option<EditorStyle>,
  536    next_editor_action_id: EditorActionId,
  537    editor_actions: Rc<RefCell<BTreeMap<EditorActionId, Box<dyn Fn(&mut ViewContext<Self>)>>>>,
  538    use_autoclose: bool,
  539    use_auto_surround: bool,
  540    auto_replace_emoji_shortcode: bool,
  541    show_git_blame_gutter: bool,
  542    show_git_blame_inline: bool,
  543    show_git_blame_inline_delay_task: Option<Task<()>>,
  544    git_blame_inline_enabled: bool,
  545    show_selection_menu: Option<bool>,
  546    blame: Option<Model<GitBlame>>,
  547    blame_subscription: Option<Subscription>,
  548    custom_context_menu: Option<
  549        Box<
  550            dyn 'static
  551                + Fn(&mut Self, DisplayPoint, &mut ViewContext<Self>) -> Option<View<ui::ContextMenu>>,
  552        >,
  553    >,
  554    last_bounds: Option<Bounds<Pixels>>,
  555    expect_bounds_change: Option<Bounds<Pixels>>,
  556    tasks: BTreeMap<(BufferId, BufferRow), RunnableTasks>,
  557    tasks_update_task: Option<Task<()>>,
  558    previous_search_ranges: Option<Arc<[Range<Anchor>]>>,
  559    file_header_size: u8,
  560    breadcrumb_header: Option<String>,
  561}
  562
  563#[derive(Clone)]
  564pub struct EditorSnapshot {
  565    pub mode: EditorMode,
  566    show_gutter: bool,
  567    show_line_numbers: Option<bool>,
  568    show_git_diff_gutter: Option<bool>,
  569    show_code_actions: Option<bool>,
  570    show_runnables: Option<bool>,
  571    render_git_blame_gutter: bool,
  572    pub display_snapshot: DisplaySnapshot,
  573    pub placeholder_text: Option<Arc<str>>,
  574    is_focused: bool,
  575    scroll_anchor: ScrollAnchor,
  576    ongoing_scroll: OngoingScroll,
  577    current_line_highlight: CurrentLineHighlight,
  578    gutter_hovered: bool,
  579}
  580
  581const GIT_BLAME_GUTTER_WIDTH_CHARS: f32 = 53.;
  582
  583#[derive(Debug, Clone, Copy)]
  584pub struct GutterDimensions {
  585    pub left_padding: Pixels,
  586    pub right_padding: Pixels,
  587    pub width: Pixels,
  588    pub margin: Pixels,
  589    pub git_blame_entries_width: Option<Pixels>,
  590}
  591
  592impl GutterDimensions {
  593    /// The full width of the space taken up by the gutter.
  594    pub fn full_width(&self) -> Pixels {
  595        self.margin + self.width
  596    }
  597
  598    /// The width of the space reserved for the fold indicators,
  599    /// use alongside 'justify_end' and `gutter_width` to
  600    /// right align content with the line numbers
  601    pub fn fold_area_width(&self) -> Pixels {
  602        self.margin + self.right_padding
  603    }
  604}
  605
  606impl Default for GutterDimensions {
  607    fn default() -> Self {
  608        Self {
  609            left_padding: Pixels::ZERO,
  610            right_padding: Pixels::ZERO,
  611            width: Pixels::ZERO,
  612            margin: Pixels::ZERO,
  613            git_blame_entries_width: None,
  614        }
  615    }
  616}
  617
  618#[derive(Debug)]
  619pub struct RemoteSelection {
  620    pub replica_id: ReplicaId,
  621    pub selection: Selection<Anchor>,
  622    pub cursor_shape: CursorShape,
  623    pub peer_id: PeerId,
  624    pub line_mode: bool,
  625    pub participant_index: Option<ParticipantIndex>,
  626    pub user_name: Option<SharedString>,
  627}
  628
  629#[derive(Clone, Debug)]
  630struct SelectionHistoryEntry {
  631    selections: Arc<[Selection<Anchor>]>,
  632    select_next_state: Option<SelectNextState>,
  633    select_prev_state: Option<SelectNextState>,
  634    add_selections_state: Option<AddSelectionsState>,
  635}
  636
  637enum SelectionHistoryMode {
  638    Normal,
  639    Undoing,
  640    Redoing,
  641}
  642
  643#[derive(Clone, PartialEq, Eq, Hash)]
  644struct HoveredCursor {
  645    replica_id: u16,
  646    selection_id: usize,
  647}
  648
  649impl Default for SelectionHistoryMode {
  650    fn default() -> Self {
  651        Self::Normal
  652    }
  653}
  654
  655#[derive(Default)]
  656struct SelectionHistory {
  657    #[allow(clippy::type_complexity)]
  658    selections_by_transaction:
  659        HashMap<TransactionId, (Arc<[Selection<Anchor>]>, Option<Arc<[Selection<Anchor>]>>)>,
  660    mode: SelectionHistoryMode,
  661    undo_stack: VecDeque<SelectionHistoryEntry>,
  662    redo_stack: VecDeque<SelectionHistoryEntry>,
  663}
  664
  665impl SelectionHistory {
  666    fn insert_transaction(
  667        &mut self,
  668        transaction_id: TransactionId,
  669        selections: Arc<[Selection<Anchor>]>,
  670    ) {
  671        self.selections_by_transaction
  672            .insert(transaction_id, (selections, None));
  673    }
  674
  675    #[allow(clippy::type_complexity)]
  676    fn transaction(
  677        &self,
  678        transaction_id: TransactionId,
  679    ) -> Option<&(Arc<[Selection<Anchor>]>, Option<Arc<[Selection<Anchor>]>>)> {
  680        self.selections_by_transaction.get(&transaction_id)
  681    }
  682
  683    #[allow(clippy::type_complexity)]
  684    fn transaction_mut(
  685        &mut self,
  686        transaction_id: TransactionId,
  687    ) -> Option<&mut (Arc<[Selection<Anchor>]>, Option<Arc<[Selection<Anchor>]>>)> {
  688        self.selections_by_transaction.get_mut(&transaction_id)
  689    }
  690
  691    fn push(&mut self, entry: SelectionHistoryEntry) {
  692        if !entry.selections.is_empty() {
  693            match self.mode {
  694                SelectionHistoryMode::Normal => {
  695                    self.push_undo(entry);
  696                    self.redo_stack.clear();
  697                }
  698                SelectionHistoryMode::Undoing => self.push_redo(entry),
  699                SelectionHistoryMode::Redoing => self.push_undo(entry),
  700            }
  701        }
  702    }
  703
  704    fn push_undo(&mut self, entry: SelectionHistoryEntry) {
  705        if self
  706            .undo_stack
  707            .back()
  708            .map_or(true, |e| e.selections != entry.selections)
  709        {
  710            self.undo_stack.push_back(entry);
  711            if self.undo_stack.len() > MAX_SELECTION_HISTORY_LEN {
  712                self.undo_stack.pop_front();
  713            }
  714        }
  715    }
  716
  717    fn push_redo(&mut self, entry: SelectionHistoryEntry) {
  718        if self
  719            .redo_stack
  720            .back()
  721            .map_or(true, |e| e.selections != entry.selections)
  722        {
  723            self.redo_stack.push_back(entry);
  724            if self.redo_stack.len() > MAX_SELECTION_HISTORY_LEN {
  725                self.redo_stack.pop_front();
  726            }
  727        }
  728    }
  729}
  730
  731struct RowHighlight {
  732    index: usize,
  733    range: RangeInclusive<Anchor>,
  734    color: Option<Hsla>,
  735    should_autoscroll: bool,
  736}
  737
  738#[derive(Clone, Debug)]
  739struct AddSelectionsState {
  740    above: bool,
  741    stack: Vec<usize>,
  742}
  743
  744#[derive(Clone)]
  745struct SelectNextState {
  746    query: AhoCorasick,
  747    wordwise: bool,
  748    done: bool,
  749}
  750
  751impl std::fmt::Debug for SelectNextState {
  752    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
  753        f.debug_struct(std::any::type_name::<Self>())
  754            .field("wordwise", &self.wordwise)
  755            .field("done", &self.done)
  756            .finish()
  757    }
  758}
  759
  760#[derive(Debug)]
  761struct AutocloseRegion {
  762    selection_id: usize,
  763    range: Range<Anchor>,
  764    pair: BracketPair,
  765}
  766
  767#[derive(Debug)]
  768struct SnippetState {
  769    ranges: Vec<Vec<Range<Anchor>>>,
  770    active_index: usize,
  771}
  772
  773#[doc(hidden)]
  774pub struct RenameState {
  775    pub range: Range<Anchor>,
  776    pub old_name: Arc<str>,
  777    pub editor: View<Editor>,
  778    block_id: BlockId,
  779}
  780
  781struct InvalidationStack<T>(Vec<T>);
  782
  783struct RegisteredInlineCompletionProvider {
  784    provider: Arc<dyn InlineCompletionProviderHandle>,
  785    _subscription: Subscription,
  786}
  787
  788enum ContextMenu {
  789    Completions(CompletionsMenu),
  790    CodeActions(CodeActionsMenu),
  791}
  792
  793impl ContextMenu {
  794    fn select_first(
  795        &mut self,
  796        project: Option<&Model<Project>>,
  797        cx: &mut ViewContext<Editor>,
  798    ) -> bool {
  799        if self.visible() {
  800            match self {
  801                ContextMenu::Completions(menu) => menu.select_first(project, cx),
  802                ContextMenu::CodeActions(menu) => menu.select_first(cx),
  803            }
  804            true
  805        } else {
  806            false
  807        }
  808    }
  809
  810    fn select_prev(
  811        &mut self,
  812        project: Option<&Model<Project>>,
  813        cx: &mut ViewContext<Editor>,
  814    ) -> bool {
  815        if self.visible() {
  816            match self {
  817                ContextMenu::Completions(menu) => menu.select_prev(project, cx),
  818                ContextMenu::CodeActions(menu) => menu.select_prev(cx),
  819            }
  820            true
  821        } else {
  822            false
  823        }
  824    }
  825
  826    fn select_next(
  827        &mut self,
  828        project: Option<&Model<Project>>,
  829        cx: &mut ViewContext<Editor>,
  830    ) -> bool {
  831        if self.visible() {
  832            match self {
  833                ContextMenu::Completions(menu) => menu.select_next(project, cx),
  834                ContextMenu::CodeActions(menu) => menu.select_next(cx),
  835            }
  836            true
  837        } else {
  838            false
  839        }
  840    }
  841
  842    fn select_last(
  843        &mut self,
  844        project: Option<&Model<Project>>,
  845        cx: &mut ViewContext<Editor>,
  846    ) -> bool {
  847        if self.visible() {
  848            match self {
  849                ContextMenu::Completions(menu) => menu.select_last(project, cx),
  850                ContextMenu::CodeActions(menu) => menu.select_last(cx),
  851            }
  852            true
  853        } else {
  854            false
  855        }
  856    }
  857
  858    fn visible(&self) -> bool {
  859        match self {
  860            ContextMenu::Completions(menu) => menu.visible(),
  861            ContextMenu::CodeActions(menu) => menu.visible(),
  862        }
  863    }
  864
  865    fn render(
  866        &self,
  867        cursor_position: DisplayPoint,
  868        style: &EditorStyle,
  869        max_height: Pixels,
  870        workspace: Option<WeakView<Workspace>>,
  871        cx: &mut ViewContext<Editor>,
  872    ) -> (ContextMenuOrigin, AnyElement) {
  873        match self {
  874            ContextMenu::Completions(menu) => (
  875                ContextMenuOrigin::EditorPoint(cursor_position),
  876                menu.render(style, max_height, workspace, cx),
  877            ),
  878            ContextMenu::CodeActions(menu) => menu.render(cursor_position, style, max_height, cx),
  879        }
  880    }
  881}
  882
  883enum ContextMenuOrigin {
  884    EditorPoint(DisplayPoint),
  885    GutterIndicator(DisplayRow),
  886}
  887
  888#[derive(Clone)]
  889struct CompletionsMenu {
  890    id: CompletionId,
  891    initial_position: Anchor,
  892    buffer: Model<Buffer>,
  893    completions: Arc<RwLock<Box<[Completion]>>>,
  894    match_candidates: Arc<[StringMatchCandidate]>,
  895    matches: Arc<[StringMatch]>,
  896    selected_item: usize,
  897    scroll_handle: UniformListScrollHandle,
  898    selected_completion_documentation_resolve_debounce: Arc<Mutex<DebouncedDelay>>,
  899}
  900
  901impl CompletionsMenu {
  902    fn select_first(&mut self, project: Option<&Model<Project>>, cx: &mut ViewContext<Editor>) {
  903        self.selected_item = 0;
  904        self.scroll_handle.scroll_to_item(self.selected_item);
  905        self.attempt_resolve_selected_completion_documentation(project, cx);
  906        cx.notify();
  907    }
  908
  909    fn select_prev(&mut self, project: Option<&Model<Project>>, cx: &mut ViewContext<Editor>) {
  910        if self.selected_item > 0 {
  911            self.selected_item -= 1;
  912        } else {
  913            self.selected_item = self.matches.len() - 1;
  914        }
  915        self.scroll_handle.scroll_to_item(self.selected_item);
  916        self.attempt_resolve_selected_completion_documentation(project, cx);
  917        cx.notify();
  918    }
  919
  920    fn select_next(&mut self, project: Option<&Model<Project>>, cx: &mut ViewContext<Editor>) {
  921        if self.selected_item + 1 < self.matches.len() {
  922            self.selected_item += 1;
  923        } else {
  924            self.selected_item = 0;
  925        }
  926        self.scroll_handle.scroll_to_item(self.selected_item);
  927        self.attempt_resolve_selected_completion_documentation(project, cx);
  928        cx.notify();
  929    }
  930
  931    fn select_last(&mut self, project: Option<&Model<Project>>, cx: &mut ViewContext<Editor>) {
  932        self.selected_item = self.matches.len() - 1;
  933        self.scroll_handle.scroll_to_item(self.selected_item);
  934        self.attempt_resolve_selected_completion_documentation(project, cx);
  935        cx.notify();
  936    }
  937
  938    fn pre_resolve_completion_documentation(
  939        buffer: Model<Buffer>,
  940        completions: Arc<RwLock<Box<[Completion]>>>,
  941        matches: Arc<[StringMatch]>,
  942        editor: &Editor,
  943        cx: &mut ViewContext<Editor>,
  944    ) -> Task<()> {
  945        let settings = EditorSettings::get_global(cx);
  946        if !settings.show_completion_documentation {
  947            return Task::ready(());
  948        }
  949
  950        let Some(provider) = editor.completion_provider.as_ref() else {
  951            return Task::ready(());
  952        };
  953
  954        let resolve_task = provider.resolve_completions(
  955            buffer,
  956            matches.iter().map(|m| m.candidate_id).collect(),
  957            completions.clone(),
  958            cx,
  959        );
  960
  961        return cx.spawn(move |this, mut cx| async move {
  962            if let Some(true) = resolve_task.await.log_err() {
  963                this.update(&mut cx, |_, cx| cx.notify()).ok();
  964            }
  965        });
  966    }
  967
  968    fn attempt_resolve_selected_completion_documentation(
  969        &mut self,
  970        project: Option<&Model<Project>>,
  971        cx: &mut ViewContext<Editor>,
  972    ) {
  973        let settings = EditorSettings::get_global(cx);
  974        if !settings.show_completion_documentation {
  975            return;
  976        }
  977
  978        let completion_index = self.matches[self.selected_item].candidate_id;
  979        let Some(project) = project else {
  980            return;
  981        };
  982
  983        let resolve_task = project.update(cx, |project, cx| {
  984            project.resolve_completions(
  985                self.buffer.clone(),
  986                vec![completion_index],
  987                self.completions.clone(),
  988                cx,
  989            )
  990        });
  991
  992        let delay_ms =
  993            EditorSettings::get_global(cx).completion_documentation_secondary_query_debounce;
  994        let delay = Duration::from_millis(delay_ms);
  995
  996        self.selected_completion_documentation_resolve_debounce
  997            .lock()
  998            .fire_new(delay, cx, |_, cx| {
  999                cx.spawn(move |this, mut cx| async move {
 1000                    if let Some(true) = resolve_task.await.log_err() {
 1001                        this.update(&mut cx, |_, cx| cx.notify()).ok();
 1002                    }
 1003                })
 1004            });
 1005    }
 1006
 1007    fn visible(&self) -> bool {
 1008        !self.matches.is_empty()
 1009    }
 1010
 1011    fn render(
 1012        &self,
 1013        style: &EditorStyle,
 1014        max_height: Pixels,
 1015        workspace: Option<WeakView<Workspace>>,
 1016        cx: &mut ViewContext<Editor>,
 1017    ) -> AnyElement {
 1018        let settings = EditorSettings::get_global(cx);
 1019        let show_completion_documentation = settings.show_completion_documentation;
 1020
 1021        let widest_completion_ix = self
 1022            .matches
 1023            .iter()
 1024            .enumerate()
 1025            .max_by_key(|(_, mat)| {
 1026                let completions = self.completions.read();
 1027                let completion = &completions[mat.candidate_id];
 1028                let documentation = &completion.documentation;
 1029
 1030                let mut len = completion.label.text.chars().count();
 1031                if let Some(Documentation::SingleLine(text)) = documentation {
 1032                    if show_completion_documentation {
 1033                        len += text.chars().count();
 1034                    }
 1035                }
 1036
 1037                len
 1038            })
 1039            .map(|(ix, _)| ix);
 1040
 1041        let completions = self.completions.clone();
 1042        let matches = self.matches.clone();
 1043        let selected_item = self.selected_item;
 1044        let style = style.clone();
 1045
 1046        let multiline_docs = if show_completion_documentation {
 1047            let mat = &self.matches[selected_item];
 1048            let multiline_docs = match &self.completions.read()[mat.candidate_id].documentation {
 1049                Some(Documentation::MultiLinePlainText(text)) => {
 1050                    Some(div().child(SharedString::from(text.clone())))
 1051                }
 1052                Some(Documentation::MultiLineMarkdown(parsed)) if !parsed.text.is_empty() => {
 1053                    Some(div().child(render_parsed_markdown(
 1054                        "completions_markdown",
 1055                        parsed,
 1056                        &style,
 1057                        workspace,
 1058                        cx,
 1059                    )))
 1060                }
 1061                _ => None,
 1062            };
 1063            multiline_docs.map(|div| {
 1064                div.id("multiline_docs")
 1065                    .max_h(max_height)
 1066                    .flex_1()
 1067                    .px_1p5()
 1068                    .py_1()
 1069                    .min_w(px(260.))
 1070                    .max_w(px(640.))
 1071                    .w(px(500.))
 1072                    .overflow_y_scroll()
 1073                    .occlude()
 1074            })
 1075        } else {
 1076            None
 1077        };
 1078
 1079        let list = uniform_list(
 1080            cx.view().clone(),
 1081            "completions",
 1082            matches.len(),
 1083            move |_editor, range, cx| {
 1084                let start_ix = range.start;
 1085                let completions_guard = completions.read();
 1086
 1087                matches[range]
 1088                    .iter()
 1089                    .enumerate()
 1090                    .map(|(ix, mat)| {
 1091                        let item_ix = start_ix + ix;
 1092                        let candidate_id = mat.candidate_id;
 1093                        let completion = &completions_guard[candidate_id];
 1094
 1095                        let documentation = if show_completion_documentation {
 1096                            &completion.documentation
 1097                        } else {
 1098                            &None
 1099                        };
 1100
 1101                        let highlights = gpui::combine_highlights(
 1102                            mat.ranges().map(|range| (range, FontWeight::BOLD.into())),
 1103                            styled_runs_for_code_label(&completion.label, &style.syntax).map(
 1104                                |(range, mut highlight)| {
 1105                                    // Ignore font weight for syntax highlighting, as we'll use it
 1106                                    // for fuzzy matches.
 1107                                    highlight.font_weight = None;
 1108
 1109                                    if completion.lsp_completion.deprecated.unwrap_or(false) {
 1110                                        highlight.strikethrough = Some(StrikethroughStyle {
 1111                                            thickness: 1.0.into(),
 1112                                            ..Default::default()
 1113                                        });
 1114                                        highlight.color = Some(cx.theme().colors().text_muted);
 1115                                    }
 1116
 1117                                    (range, highlight)
 1118                                },
 1119                            ),
 1120                        );
 1121                        let completion_label = StyledText::new(completion.label.text.clone())
 1122                            .with_highlights(&style.text, highlights);
 1123                        let documentation_label =
 1124                            if let Some(Documentation::SingleLine(text)) = documentation {
 1125                                if text.trim().is_empty() {
 1126                                    None
 1127                                } else {
 1128                                    Some(
 1129                                        h_flex().ml_4().child(
 1130                                            Label::new(text.clone())
 1131                                                .size(LabelSize::Small)
 1132                                                .color(Color::Muted),
 1133                                        ),
 1134                                    )
 1135                                }
 1136                            } else {
 1137                                None
 1138                            };
 1139
 1140                        div().min_w(px(220.)).max_w(px(540.)).child(
 1141                            ListItem::new(mat.candidate_id)
 1142                                .inset(true)
 1143                                .selected(item_ix == selected_item)
 1144                                .on_click(cx.listener(move |editor, _event, cx| {
 1145                                    cx.stop_propagation();
 1146                                    if let Some(task) = editor.confirm_completion(
 1147                                        &ConfirmCompletion {
 1148                                            item_ix: Some(item_ix),
 1149                                        },
 1150                                        cx,
 1151                                    ) {
 1152                                        task.detach_and_log_err(cx)
 1153                                    }
 1154                                }))
 1155                                .child(h_flex().overflow_hidden().child(completion_label))
 1156                                .end_slot::<Div>(documentation_label),
 1157                        )
 1158                    })
 1159                    .collect()
 1160            },
 1161        )
 1162        .occlude()
 1163        .max_h(max_height)
 1164        .track_scroll(self.scroll_handle.clone())
 1165        .with_width_from_item(widest_completion_ix)
 1166        .with_sizing_behavior(ListSizingBehavior::Infer);
 1167
 1168        Popover::new()
 1169            .child(list)
 1170            .when_some(multiline_docs, |popover, multiline_docs| {
 1171                popover.aside(multiline_docs)
 1172            })
 1173            .into_any_element()
 1174    }
 1175
 1176    pub async fn filter(&mut self, query: Option<&str>, executor: BackgroundExecutor) {
 1177        let mut matches = if let Some(query) = query {
 1178            fuzzy::match_strings(
 1179                &self.match_candidates,
 1180                query,
 1181                query.chars().any(|c| c.is_uppercase()),
 1182                100,
 1183                &Default::default(),
 1184                executor,
 1185            )
 1186            .await
 1187        } else {
 1188            self.match_candidates
 1189                .iter()
 1190                .enumerate()
 1191                .map(|(candidate_id, candidate)| StringMatch {
 1192                    candidate_id,
 1193                    score: Default::default(),
 1194                    positions: Default::default(),
 1195                    string: candidate.string.clone(),
 1196                })
 1197                .collect()
 1198        };
 1199
 1200        // Remove all candidates where the query's start does not match the start of any word in the candidate
 1201        if let Some(query) = query {
 1202            if let Some(query_start) = query.chars().next() {
 1203                matches.retain(|string_match| {
 1204                    split_words(&string_match.string).any(|word| {
 1205                        // Check that the first codepoint of the word as lowercase matches the first
 1206                        // codepoint of the query as lowercase
 1207                        word.chars()
 1208                            .flat_map(|codepoint| codepoint.to_lowercase())
 1209                            .zip(query_start.to_lowercase())
 1210                            .all(|(word_cp, query_cp)| word_cp == query_cp)
 1211                    })
 1212                });
 1213            }
 1214        }
 1215
 1216        let completions = self.completions.read();
 1217        matches.sort_unstable_by_key(|mat| {
 1218            // We do want to strike a balance here between what the language server tells us
 1219            // to sort by (the sort_text) and what are "obvious" good matches (i.e. when you type
 1220            // `Creat` and there is a local variable called `CreateComponent`).
 1221            // So what we do is: we bucket all matches into two buckets
 1222            // - Strong matches
 1223            // - Weak matches
 1224            // Strong matches are the ones with a high fuzzy-matcher score (the "obvious" matches)
 1225            // and the Weak matches are the rest.
 1226            //
 1227            // For the strong matches, we sort by the language-servers score first and for the weak
 1228            // matches, we prefer our fuzzy finder first.
 1229            //
 1230            // The thinking behind that: it's useless to take the sort_text the language-server gives
 1231            // us into account when it's obviously a bad match.
 1232
 1233            #[derive(PartialEq, Eq, PartialOrd, Ord)]
 1234            enum MatchScore<'a> {
 1235                Strong {
 1236                    sort_text: Option<&'a str>,
 1237                    score: Reverse<OrderedFloat<f64>>,
 1238                    sort_key: (usize, &'a str),
 1239                },
 1240                Weak {
 1241                    score: Reverse<OrderedFloat<f64>>,
 1242                    sort_text: Option<&'a str>,
 1243                    sort_key: (usize, &'a str),
 1244                },
 1245            }
 1246
 1247            let completion = &completions[mat.candidate_id];
 1248            let sort_key = completion.sort_key();
 1249            let sort_text = completion.lsp_completion.sort_text.as_deref();
 1250            let score = Reverse(OrderedFloat(mat.score));
 1251
 1252            if mat.score >= 0.2 {
 1253                MatchScore::Strong {
 1254                    sort_text,
 1255                    score,
 1256                    sort_key,
 1257                }
 1258            } else {
 1259                MatchScore::Weak {
 1260                    score,
 1261                    sort_text,
 1262                    sort_key,
 1263                }
 1264            }
 1265        });
 1266
 1267        for mat in &mut matches {
 1268            let completion = &completions[mat.candidate_id];
 1269            mat.string.clone_from(&completion.label.text);
 1270            for position in &mut mat.positions {
 1271                *position += completion.label.filter_range.start;
 1272            }
 1273        }
 1274        drop(completions);
 1275
 1276        self.matches = matches.into();
 1277        self.selected_item = 0;
 1278    }
 1279}
 1280
 1281#[derive(Clone)]
 1282struct CodeActionContents {
 1283    tasks: Option<Arc<ResolvedTasks>>,
 1284    actions: Option<Arc<[CodeAction]>>,
 1285}
 1286
 1287impl CodeActionContents {
 1288    fn len(&self) -> usize {
 1289        match (&self.tasks, &self.actions) {
 1290            (Some(tasks), Some(actions)) => actions.len() + tasks.templates.len(),
 1291            (Some(tasks), None) => tasks.templates.len(),
 1292            (None, Some(actions)) => actions.len(),
 1293            (None, None) => 0,
 1294        }
 1295    }
 1296
 1297    fn is_empty(&self) -> bool {
 1298        match (&self.tasks, &self.actions) {
 1299            (Some(tasks), Some(actions)) => actions.is_empty() && tasks.templates.is_empty(),
 1300            (Some(tasks), None) => tasks.templates.is_empty(),
 1301            (None, Some(actions)) => actions.is_empty(),
 1302            (None, None) => true,
 1303        }
 1304    }
 1305
 1306    fn iter(&self) -> impl Iterator<Item = CodeActionsItem> + '_ {
 1307        self.tasks
 1308            .iter()
 1309            .flat_map(|tasks| {
 1310                tasks
 1311                    .templates
 1312                    .iter()
 1313                    .map(|(kind, task)| CodeActionsItem::Task(kind.clone(), task.clone()))
 1314            })
 1315            .chain(self.actions.iter().flat_map(|actions| {
 1316                actions
 1317                    .iter()
 1318                    .map(|action| CodeActionsItem::CodeAction(action.clone()))
 1319            }))
 1320    }
 1321    fn get(&self, index: usize) -> Option<CodeActionsItem> {
 1322        match (&self.tasks, &self.actions) {
 1323            (Some(tasks), Some(actions)) => {
 1324                if index < tasks.templates.len() {
 1325                    tasks
 1326                        .templates
 1327                        .get(index)
 1328                        .cloned()
 1329                        .map(|(kind, task)| CodeActionsItem::Task(kind, task))
 1330                } else {
 1331                    actions
 1332                        .get(index - tasks.templates.len())
 1333                        .cloned()
 1334                        .map(CodeActionsItem::CodeAction)
 1335                }
 1336            }
 1337            (Some(tasks), None) => tasks
 1338                .templates
 1339                .get(index)
 1340                .cloned()
 1341                .map(|(kind, task)| CodeActionsItem::Task(kind, task)),
 1342            (None, Some(actions)) => actions.get(index).cloned().map(CodeActionsItem::CodeAction),
 1343            (None, None) => None,
 1344        }
 1345    }
 1346}
 1347
 1348#[allow(clippy::large_enum_variant)]
 1349#[derive(Clone)]
 1350enum CodeActionsItem {
 1351    Task(TaskSourceKind, ResolvedTask),
 1352    CodeAction(CodeAction),
 1353}
 1354
 1355impl CodeActionsItem {
 1356    fn as_task(&self) -> Option<&ResolvedTask> {
 1357        let Self::Task(_, task) = self else {
 1358            return None;
 1359        };
 1360        Some(task)
 1361    }
 1362    fn as_code_action(&self) -> Option<&CodeAction> {
 1363        let Self::CodeAction(action) = self else {
 1364            return None;
 1365        };
 1366        Some(action)
 1367    }
 1368    fn label(&self) -> String {
 1369        match self {
 1370            Self::CodeAction(action) => action.lsp_action.title.clone(),
 1371            Self::Task(_, task) => task.resolved_label.clone(),
 1372        }
 1373    }
 1374}
 1375
 1376struct CodeActionsMenu {
 1377    actions: CodeActionContents,
 1378    buffer: Model<Buffer>,
 1379    selected_item: usize,
 1380    scroll_handle: UniformListScrollHandle,
 1381    deployed_from_indicator: Option<DisplayRow>,
 1382}
 1383
 1384impl CodeActionsMenu {
 1385    fn select_first(&mut self, cx: &mut ViewContext<Editor>) {
 1386        self.selected_item = 0;
 1387        self.scroll_handle.scroll_to_item(self.selected_item);
 1388        cx.notify()
 1389    }
 1390
 1391    fn select_prev(&mut self, cx: &mut ViewContext<Editor>) {
 1392        if self.selected_item > 0 {
 1393            self.selected_item -= 1;
 1394        } else {
 1395            self.selected_item = self.actions.len() - 1;
 1396        }
 1397        self.scroll_handle.scroll_to_item(self.selected_item);
 1398        cx.notify();
 1399    }
 1400
 1401    fn select_next(&mut self, cx: &mut ViewContext<Editor>) {
 1402        if self.selected_item + 1 < self.actions.len() {
 1403            self.selected_item += 1;
 1404        } else {
 1405            self.selected_item = 0;
 1406        }
 1407        self.scroll_handle.scroll_to_item(self.selected_item);
 1408        cx.notify();
 1409    }
 1410
 1411    fn select_last(&mut self, cx: &mut ViewContext<Editor>) {
 1412        self.selected_item = self.actions.len() - 1;
 1413        self.scroll_handle.scroll_to_item(self.selected_item);
 1414        cx.notify()
 1415    }
 1416
 1417    fn visible(&self) -> bool {
 1418        !self.actions.is_empty()
 1419    }
 1420
 1421    fn render(
 1422        &self,
 1423        cursor_position: DisplayPoint,
 1424        _style: &EditorStyle,
 1425        max_height: Pixels,
 1426        cx: &mut ViewContext<Editor>,
 1427    ) -> (ContextMenuOrigin, AnyElement) {
 1428        let actions = self.actions.clone();
 1429        let selected_item = self.selected_item;
 1430        let element = uniform_list(
 1431            cx.view().clone(),
 1432            "code_actions_menu",
 1433            self.actions.len(),
 1434            move |_this, range, cx| {
 1435                actions
 1436                    .iter()
 1437                    .skip(range.start)
 1438                    .take(range.end - range.start)
 1439                    .enumerate()
 1440                    .map(|(ix, action)| {
 1441                        let item_ix = range.start + ix;
 1442                        let selected = selected_item == item_ix;
 1443                        let colors = cx.theme().colors();
 1444                        div()
 1445                            .px_2()
 1446                            .text_color(colors.text)
 1447                            .when(selected, |style| {
 1448                                style
 1449                                    .bg(colors.element_active)
 1450                                    .text_color(colors.text_accent)
 1451                            })
 1452                            .hover(|style| {
 1453                                style
 1454                                    .bg(colors.element_hover)
 1455                                    .text_color(colors.text_accent)
 1456                            })
 1457                            .whitespace_nowrap()
 1458                            .when_some(action.as_code_action(), |this, action| {
 1459                                this.on_mouse_down(
 1460                                    MouseButton::Left,
 1461                                    cx.listener(move |editor, _, cx| {
 1462                                        cx.stop_propagation();
 1463                                        if let Some(task) = editor.confirm_code_action(
 1464                                            &ConfirmCodeAction {
 1465                                                item_ix: Some(item_ix),
 1466                                            },
 1467                                            cx,
 1468                                        ) {
 1469                                            task.detach_and_log_err(cx)
 1470                                        }
 1471                                    }),
 1472                                )
 1473                                // TASK: It would be good to make lsp_action.title a SharedString to avoid allocating here.
 1474                                .child(SharedString::from(action.lsp_action.title.clone()))
 1475                            })
 1476                            .when_some(action.as_task(), |this, task| {
 1477                                this.on_mouse_down(
 1478                                    MouseButton::Left,
 1479                                    cx.listener(move |editor, _, cx| {
 1480                                        cx.stop_propagation();
 1481                                        if let Some(task) = editor.confirm_code_action(
 1482                                            &ConfirmCodeAction {
 1483                                                item_ix: Some(item_ix),
 1484                                            },
 1485                                            cx,
 1486                                        ) {
 1487                                            task.detach_and_log_err(cx)
 1488                                        }
 1489                                    }),
 1490                                )
 1491                                .child(SharedString::from(task.resolved_label.clone()))
 1492                            })
 1493                    })
 1494                    .collect()
 1495            },
 1496        )
 1497        .elevation_1(cx)
 1498        .px_2()
 1499        .py_1()
 1500        .max_h(max_height)
 1501        .occlude()
 1502        .track_scroll(self.scroll_handle.clone())
 1503        .with_width_from_item(
 1504            self.actions
 1505                .iter()
 1506                .enumerate()
 1507                .max_by_key(|(_, action)| match action {
 1508                    CodeActionsItem::Task(_, task) => task.resolved_label.chars().count(),
 1509                    CodeActionsItem::CodeAction(action) => action.lsp_action.title.chars().count(),
 1510                })
 1511                .map(|(ix, _)| ix),
 1512        )
 1513        .with_sizing_behavior(ListSizingBehavior::Infer)
 1514        .into_any_element();
 1515
 1516        let cursor_position = if let Some(row) = self.deployed_from_indicator {
 1517            ContextMenuOrigin::GutterIndicator(row)
 1518        } else {
 1519            ContextMenuOrigin::EditorPoint(cursor_position)
 1520        };
 1521
 1522        (cursor_position, element)
 1523    }
 1524}
 1525
 1526#[derive(Debug)]
 1527struct ActiveDiagnosticGroup {
 1528    primary_range: Range<Anchor>,
 1529    primary_message: String,
 1530    group_id: usize,
 1531    blocks: HashMap<BlockId, Diagnostic>,
 1532    is_valid: bool,
 1533}
 1534
 1535#[derive(Serialize, Deserialize, Clone, Debug)]
 1536pub struct ClipboardSelection {
 1537    pub len: usize,
 1538    pub is_entire_line: bool,
 1539    pub first_line_indent: u32,
 1540}
 1541
 1542#[derive(Debug)]
 1543pub(crate) struct NavigationData {
 1544    cursor_anchor: Anchor,
 1545    cursor_position: Point,
 1546    scroll_anchor: ScrollAnchor,
 1547    scroll_top_row: u32,
 1548}
 1549
 1550enum GotoDefinitionKind {
 1551    Symbol,
 1552    Type,
 1553    Implementation,
 1554}
 1555
 1556#[derive(Debug, Clone)]
 1557enum InlayHintRefreshReason {
 1558    Toggle(bool),
 1559    SettingsChange(InlayHintSettings),
 1560    NewLinesShown,
 1561    BufferEdited(HashSet<Arc<Language>>),
 1562    RefreshRequested,
 1563    ExcerptsRemoved(Vec<ExcerptId>),
 1564}
 1565
 1566impl InlayHintRefreshReason {
 1567    fn description(&self) -> &'static str {
 1568        match self {
 1569            Self::Toggle(_) => "toggle",
 1570            Self::SettingsChange(_) => "settings change",
 1571            Self::NewLinesShown => "new lines shown",
 1572            Self::BufferEdited(_) => "buffer edited",
 1573            Self::RefreshRequested => "refresh requested",
 1574            Self::ExcerptsRemoved(_) => "excerpts removed",
 1575        }
 1576    }
 1577}
 1578
 1579impl Editor {
 1580    pub fn single_line(cx: &mut ViewContext<Self>) -> Self {
 1581        let buffer = cx.new_model(|cx| Buffer::local("", cx));
 1582        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1583        Self::new(EditorMode::SingleLine, buffer, None, false, cx)
 1584    }
 1585
 1586    pub fn multi_line(cx: &mut ViewContext<Self>) -> Self {
 1587        let buffer = cx.new_model(|cx| Buffer::local("", cx));
 1588        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1589        Self::new(EditorMode::Full, buffer, None, false, cx)
 1590    }
 1591
 1592    pub fn auto_height(max_lines: usize, cx: &mut ViewContext<Self>) -> Self {
 1593        let buffer = cx.new_model(|cx| Buffer::local("", cx));
 1594        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1595        Self::new(
 1596            EditorMode::AutoHeight { max_lines },
 1597            buffer,
 1598            None,
 1599            false,
 1600            cx,
 1601        )
 1602    }
 1603
 1604    pub fn for_buffer(
 1605        buffer: Model<Buffer>,
 1606        project: Option<Model<Project>>,
 1607        cx: &mut ViewContext<Self>,
 1608    ) -> Self {
 1609        let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 1610        Self::new(EditorMode::Full, buffer, project, false, cx)
 1611    }
 1612
 1613    pub fn for_multibuffer(
 1614        buffer: Model<MultiBuffer>,
 1615        project: Option<Model<Project>>,
 1616        show_excerpt_controls: bool,
 1617        cx: &mut ViewContext<Self>,
 1618    ) -> Self {
 1619        Self::new(EditorMode::Full, buffer, project, show_excerpt_controls, cx)
 1620    }
 1621
 1622    pub fn clone(&self, cx: &mut ViewContext<Self>) -> Self {
 1623        let show_excerpt_controls = self.display_map.read(cx).show_excerpt_controls();
 1624        let mut clone = Self::new(
 1625            self.mode,
 1626            self.buffer.clone(),
 1627            self.project.clone(),
 1628            show_excerpt_controls,
 1629            cx,
 1630        );
 1631        self.display_map.update(cx, |display_map, cx| {
 1632            let snapshot = display_map.snapshot(cx);
 1633            clone.display_map.update(cx, |display_map, cx| {
 1634                display_map.set_state(&snapshot, cx);
 1635            });
 1636        });
 1637        clone.selections.clone_state(&self.selections);
 1638        clone.scroll_manager.clone_state(&self.scroll_manager);
 1639        clone.searchable = self.searchable;
 1640        clone
 1641    }
 1642
 1643    pub fn new(
 1644        mode: EditorMode,
 1645        buffer: Model<MultiBuffer>,
 1646        project: Option<Model<Project>>,
 1647        show_excerpt_controls: bool,
 1648        cx: &mut ViewContext<Self>,
 1649    ) -> Self {
 1650        let style = cx.text_style();
 1651        let font_size = style.font_size.to_pixels(cx.rem_size());
 1652        let editor = cx.view().downgrade();
 1653        let fold_placeholder = FoldPlaceholder {
 1654            constrain_width: true,
 1655            render: Arc::new(move |fold_id, fold_range, cx| {
 1656                let editor = editor.clone();
 1657                div()
 1658                    .id(fold_id)
 1659                    .bg(cx.theme().colors().ghost_element_background)
 1660                    .hover(|style| style.bg(cx.theme().colors().ghost_element_hover))
 1661                    .active(|style| style.bg(cx.theme().colors().ghost_element_active))
 1662                    .rounded_sm()
 1663                    .size_full()
 1664                    .cursor_pointer()
 1665                    .child("⋯")
 1666                    .on_mouse_down(MouseButton::Left, |_, cx| cx.stop_propagation())
 1667                    .on_click(move |_, cx| {
 1668                        editor
 1669                            .update(cx, |editor, cx| {
 1670                                editor.unfold_ranges(
 1671                                    [fold_range.start..fold_range.end],
 1672                                    true,
 1673                                    false,
 1674                                    cx,
 1675                                );
 1676                                cx.stop_propagation();
 1677                            })
 1678                            .ok();
 1679                    })
 1680                    .into_any()
 1681            }),
 1682            merge_adjacent: true,
 1683        };
 1684        let file_header_size = if show_excerpt_controls { 3 } else { 2 };
 1685        let display_map = cx.new_model(|cx| {
 1686            DisplayMap::new(
 1687                buffer.clone(),
 1688                style.font(),
 1689                font_size,
 1690                None,
 1691                show_excerpt_controls,
 1692                file_header_size,
 1693                MULTI_BUFFER_EXCERPT_HEADER_HEIGHT,
 1694                MULTI_BUFFER_EXCERPT_FOOTER_HEIGHT,
 1695                fold_placeholder,
 1696                cx,
 1697            )
 1698        });
 1699
 1700        let selections = SelectionsCollection::new(display_map.clone(), buffer.clone());
 1701
 1702        let blink_manager = cx.new_model(|cx| BlinkManager::new(CURSOR_BLINK_INTERVAL, cx));
 1703
 1704        let soft_wrap_mode_override =
 1705            (mode == EditorMode::SingleLine).then(|| language_settings::SoftWrap::PreferLine);
 1706
 1707        let mut project_subscriptions = Vec::new();
 1708        if mode == EditorMode::Full {
 1709            if let Some(project) = project.as_ref() {
 1710                if buffer.read(cx).is_singleton() {
 1711                    project_subscriptions.push(cx.observe(project, |_, _, cx| {
 1712                        cx.emit(EditorEvent::TitleChanged);
 1713                    }));
 1714                }
 1715                project_subscriptions.push(cx.subscribe(project, |editor, _, event, cx| {
 1716                    if let project::Event::RefreshInlayHints = event {
 1717                        editor.refresh_inlay_hints(InlayHintRefreshReason::RefreshRequested, cx);
 1718                    } else if let project::Event::SnippetEdit(id, snippet_edits) = event {
 1719                        if let Some(buffer) = editor.buffer.read(cx).buffer(*id) {
 1720                            let focus_handle = editor.focus_handle(cx);
 1721                            if focus_handle.is_focused(cx) {
 1722                                let snapshot = buffer.read(cx).snapshot();
 1723                                for (range, snippet) in snippet_edits {
 1724                                    let editor_range =
 1725                                        language::range_from_lsp(*range).to_offset(&snapshot);
 1726                                    editor
 1727                                        .insert_snippet(&[editor_range], snippet.clone(), cx)
 1728                                        .ok();
 1729                                }
 1730                            }
 1731                        }
 1732                    }
 1733                }));
 1734                let task_inventory = project.read(cx).task_inventory().clone();
 1735                project_subscriptions.push(cx.observe(&task_inventory, |editor, _, cx| {
 1736                    editor.tasks_update_task = Some(editor.refresh_runnables(cx));
 1737                }));
 1738            }
 1739        }
 1740
 1741        let inlay_hint_settings = inlay_hint_settings(
 1742            selections.newest_anchor().head(),
 1743            &buffer.read(cx).snapshot(cx),
 1744            cx,
 1745        );
 1746        let focus_handle = cx.focus_handle();
 1747        cx.on_focus(&focus_handle, Self::handle_focus).detach();
 1748        cx.on_focus_out(&focus_handle, Self::handle_focus_out)
 1749            .detach();
 1750        cx.on_blur(&focus_handle, Self::handle_blur).detach();
 1751
 1752        let show_indent_guides = if mode == EditorMode::SingleLine {
 1753            Some(false)
 1754        } else {
 1755            None
 1756        };
 1757
 1758        let mut this = Self {
 1759            focus_handle,
 1760            show_cursor_when_unfocused: false,
 1761            last_focused_descendant: None,
 1762            buffer: buffer.clone(),
 1763            display_map: display_map.clone(),
 1764            selections,
 1765            scroll_manager: ScrollManager::new(cx),
 1766            columnar_selection_tail: None,
 1767            add_selections_state: None,
 1768            select_next_state: None,
 1769            select_prev_state: None,
 1770            selection_history: Default::default(),
 1771            autoclose_regions: Default::default(),
 1772            snippet_stack: Default::default(),
 1773            select_larger_syntax_node_stack: Vec::new(),
 1774            ime_transaction: Default::default(),
 1775            active_diagnostics: None,
 1776            soft_wrap_mode_override,
 1777            completion_provider: project.clone().map(|project| Box::new(project) as _),
 1778            collaboration_hub: project.clone().map(|project| Box::new(project) as _),
 1779            project,
 1780            blink_manager: blink_manager.clone(),
 1781            show_local_selections: true,
 1782            mode,
 1783            show_breadcrumbs: EditorSettings::get_global(cx).toolbar.breadcrumbs,
 1784            show_gutter: mode == EditorMode::Full,
 1785            show_line_numbers: None,
 1786            show_git_diff_gutter: None,
 1787            show_code_actions: None,
 1788            show_runnables: None,
 1789            show_wrap_guides: None,
 1790            show_indent_guides,
 1791            placeholder_text: None,
 1792            highlight_order: 0,
 1793            highlighted_rows: HashMap::default(),
 1794            background_highlights: Default::default(),
 1795            gutter_highlights: TreeMap::default(),
 1796            scrollbar_marker_state: ScrollbarMarkerState::default(),
 1797            active_indent_guides_state: ActiveIndentGuidesState::default(),
 1798            nav_history: None,
 1799            context_menu: RwLock::new(None),
 1800            mouse_context_menu: None,
 1801            completion_tasks: Default::default(),
 1802            find_all_references_task_sources: Vec::new(),
 1803            next_completion_id: 0,
 1804            completion_documentation_pre_resolve_debounce: DebouncedDelay::new(),
 1805            next_inlay_id: 0,
 1806            available_code_actions: Default::default(),
 1807            code_actions_task: Default::default(),
 1808            document_highlights_task: Default::default(),
 1809            linked_editing_range_task: Default::default(),
 1810            pending_rename: Default::default(),
 1811            searchable: true,
 1812            cursor_shape: Default::default(),
 1813            current_line_highlight: None,
 1814            autoindent_mode: Some(AutoindentMode::EachLine),
 1815            collapse_matches: false,
 1816            workspace: None,
 1817            keymap_context_layers: Default::default(),
 1818            input_enabled: true,
 1819            use_modal_editing: mode == EditorMode::Full,
 1820            read_only: false,
 1821            use_autoclose: true,
 1822            use_auto_surround: true,
 1823            auto_replace_emoji_shortcode: false,
 1824            leader_peer_id: None,
 1825            remote_id: None,
 1826            hover_state: Default::default(),
 1827            hovered_link_state: Default::default(),
 1828            inline_completion_provider: None,
 1829            active_inline_completion: None,
 1830            inlay_hint_cache: InlayHintCache::new(inlay_hint_settings),
 1831            expanded_hunks: ExpandedHunks::default(),
 1832            gutter_hovered: false,
 1833            pixel_position_of_newest_cursor: None,
 1834            last_bounds: None,
 1835            expect_bounds_change: None,
 1836            gutter_dimensions: GutterDimensions::default(),
 1837            style: None,
 1838            show_cursor_names: false,
 1839            hovered_cursors: Default::default(),
 1840            next_editor_action_id: EditorActionId::default(),
 1841            editor_actions: Rc::default(),
 1842            vim_replace_map: Default::default(),
 1843            show_inline_completions: mode == EditorMode::Full,
 1844            custom_context_menu: None,
 1845            show_git_blame_gutter: false,
 1846            show_git_blame_inline: false,
 1847            show_selection_menu: None,
 1848            show_git_blame_inline_delay_task: None,
 1849            git_blame_inline_enabled: ProjectSettings::get_global(cx).git.inline_blame_enabled(),
 1850            blame: None,
 1851            blame_subscription: None,
 1852            file_header_size,
 1853            tasks: Default::default(),
 1854            _subscriptions: vec![
 1855                cx.observe(&buffer, Self::on_buffer_changed),
 1856                cx.subscribe(&buffer, Self::on_buffer_event),
 1857                cx.observe(&display_map, Self::on_display_map_changed),
 1858                cx.observe(&blink_manager, |_, _, cx| cx.notify()),
 1859                cx.observe_global::<SettingsStore>(Self::settings_changed),
 1860                observe_buffer_font_size_adjustment(cx, |_, cx| cx.notify()),
 1861                cx.observe_window_activation(|editor, cx| {
 1862                    let active = cx.is_window_active();
 1863                    editor.blink_manager.update(cx, |blink_manager, cx| {
 1864                        if active {
 1865                            blink_manager.enable(cx);
 1866                        } else {
 1867                            blink_manager.show_cursor(cx);
 1868                            blink_manager.disable(cx);
 1869                        }
 1870                    });
 1871                }),
 1872            ],
 1873            tasks_update_task: None,
 1874            linked_edit_ranges: Default::default(),
 1875            previous_search_ranges: None,
 1876            breadcrumb_header: None,
 1877        };
 1878        this.tasks_update_task = Some(this.refresh_runnables(cx));
 1879        this._subscriptions.extend(project_subscriptions);
 1880
 1881        this.end_selection(cx);
 1882        this.scroll_manager.show_scrollbar(cx);
 1883
 1884        if mode == EditorMode::Full {
 1885            let should_auto_hide_scrollbars = cx.should_auto_hide_scrollbars();
 1886            cx.set_global(ScrollbarAutoHide(should_auto_hide_scrollbars));
 1887
 1888            if this.git_blame_inline_enabled {
 1889                this.git_blame_inline_enabled = true;
 1890                this.start_git_blame_inline(false, cx);
 1891            }
 1892        }
 1893
 1894        this.report_editor_event("open", None, cx);
 1895        this
 1896    }
 1897
 1898    pub fn mouse_menu_is_focused(&self, cx: &mut WindowContext) -> bool {
 1899        self.mouse_context_menu
 1900            .as_ref()
 1901            .is_some_and(|menu| menu.context_menu.focus_handle(cx).is_focused(cx))
 1902    }
 1903
 1904    fn key_context(&self, cx: &AppContext) -> KeyContext {
 1905        let mut key_context = KeyContext::new_with_defaults();
 1906        key_context.add("Editor");
 1907        let mode = match self.mode {
 1908            EditorMode::SingleLine => "single_line",
 1909            EditorMode::AutoHeight { .. } => "auto_height",
 1910            EditorMode::Full => "full",
 1911        };
 1912        key_context.set("mode", mode);
 1913        if self.pending_rename.is_some() {
 1914            key_context.add("renaming");
 1915        }
 1916        if self.context_menu_visible() {
 1917            match self.context_menu.read().as_ref() {
 1918                Some(ContextMenu::Completions(_)) => {
 1919                    key_context.add("menu");
 1920                    key_context.add("showing_completions")
 1921                }
 1922                Some(ContextMenu::CodeActions(_)) => {
 1923                    key_context.add("menu");
 1924                    key_context.add("showing_code_actions")
 1925                }
 1926                None => {}
 1927            }
 1928        }
 1929
 1930        for layer in self.keymap_context_layers.values() {
 1931            key_context.extend(layer);
 1932        }
 1933
 1934        if let Some(extension) = self
 1935            .buffer
 1936            .read(cx)
 1937            .as_singleton()
 1938            .and_then(|buffer| buffer.read(cx).file()?.path().extension()?.to_str())
 1939        {
 1940            key_context.set("extension", extension.to_string());
 1941        }
 1942
 1943        if self.has_active_inline_completion(cx) {
 1944            key_context.add("copilot_suggestion");
 1945            key_context.add("inline_completion");
 1946        }
 1947
 1948        key_context
 1949    }
 1950
 1951    pub fn new_file(
 1952        workspace: &mut Workspace,
 1953        _: &workspace::NewFile,
 1954        cx: &mut ViewContext<Workspace>,
 1955    ) {
 1956        let project = workspace.project().clone();
 1957        let create = project.update(cx, |project, cx| project.create_buffer(cx));
 1958
 1959        cx.spawn(|workspace, mut cx| async move {
 1960            let buffer = create.await?;
 1961            workspace.update(&mut cx, |workspace, cx| {
 1962                workspace.add_item_to_active_pane(
 1963                    Box::new(
 1964                        cx.new_view(|cx| Editor::for_buffer(buffer, Some(project.clone()), cx)),
 1965                    ),
 1966                    None,
 1967                    cx,
 1968                )
 1969            })
 1970        })
 1971        .detach_and_prompt_err("Failed to create buffer", cx, |e, _| match e.error_code() {
 1972            ErrorCode::RemoteUpgradeRequired => Some(format!(
 1973                "The remote instance of Zed does not support this yet. It must be upgraded to {}",
 1974                e.error_tag("required").unwrap_or("the latest version")
 1975            )),
 1976            _ => None,
 1977        });
 1978    }
 1979
 1980    pub fn new_file_in_direction(
 1981        workspace: &mut Workspace,
 1982        action: &workspace::NewFileInDirection,
 1983        cx: &mut ViewContext<Workspace>,
 1984    ) {
 1985        let project = workspace.project().clone();
 1986        let create = project.update(cx, |project, cx| project.create_buffer(cx));
 1987        let direction = action.0;
 1988
 1989        cx.spawn(|workspace, mut cx| async move {
 1990            let buffer = create.await?;
 1991            workspace.update(&mut cx, move |workspace, cx| {
 1992                workspace.split_item(
 1993                    direction,
 1994                    Box::new(
 1995                        cx.new_view(|cx| Editor::for_buffer(buffer, Some(project.clone()), cx)),
 1996                    ),
 1997                    cx,
 1998                )
 1999            })?;
 2000            anyhow::Ok(())
 2001        })
 2002        .detach_and_prompt_err("Failed to create buffer", cx, |e, _| match e.error_code() {
 2003            ErrorCode::RemoteUpgradeRequired => Some(format!(
 2004                "The remote instance of Zed does not support this yet. It must be upgraded to {}",
 2005                e.error_tag("required").unwrap_or("the latest version")
 2006            )),
 2007            _ => None,
 2008        });
 2009    }
 2010
 2011    pub fn replica_id(&self, cx: &AppContext) -> ReplicaId {
 2012        self.buffer.read(cx).replica_id()
 2013    }
 2014
 2015    pub fn leader_peer_id(&self) -> Option<PeerId> {
 2016        self.leader_peer_id
 2017    }
 2018
 2019    pub fn buffer(&self) -> &Model<MultiBuffer> {
 2020        &self.buffer
 2021    }
 2022
 2023    pub fn workspace(&self) -> Option<View<Workspace>> {
 2024        self.workspace.as_ref()?.0.upgrade()
 2025    }
 2026
 2027    pub fn title<'a>(&self, cx: &'a AppContext) -> Cow<'a, str> {
 2028        self.buffer().read(cx).title(cx)
 2029    }
 2030
 2031    pub fn snapshot(&mut self, cx: &mut WindowContext) -> EditorSnapshot {
 2032        EditorSnapshot {
 2033            mode: self.mode,
 2034            show_gutter: self.show_gutter,
 2035            show_line_numbers: self.show_line_numbers,
 2036            show_git_diff_gutter: self.show_git_diff_gutter,
 2037            show_code_actions: self.show_code_actions,
 2038            show_runnables: self.show_runnables,
 2039            render_git_blame_gutter: self.render_git_blame_gutter(cx),
 2040            display_snapshot: self.display_map.update(cx, |map, cx| map.snapshot(cx)),
 2041            scroll_anchor: self.scroll_manager.anchor(),
 2042            ongoing_scroll: self.scroll_manager.ongoing_scroll(),
 2043            placeholder_text: self.placeholder_text.clone(),
 2044            is_focused: self.focus_handle.is_focused(cx),
 2045            current_line_highlight: self
 2046                .current_line_highlight
 2047                .unwrap_or_else(|| EditorSettings::get_global(cx).current_line_highlight),
 2048            gutter_hovered: self.gutter_hovered,
 2049        }
 2050    }
 2051
 2052    pub fn language_at<T: ToOffset>(&self, point: T, cx: &AppContext) -> Option<Arc<Language>> {
 2053        self.buffer.read(cx).language_at(point, cx)
 2054    }
 2055
 2056    pub fn file_at<T: ToOffset>(
 2057        &self,
 2058        point: T,
 2059        cx: &AppContext,
 2060    ) -> Option<Arc<dyn language::File>> {
 2061        self.buffer.read(cx).read(cx).file_at(point).cloned()
 2062    }
 2063
 2064    pub fn active_excerpt(
 2065        &self,
 2066        cx: &AppContext,
 2067    ) -> Option<(ExcerptId, Model<Buffer>, Range<text::Anchor>)> {
 2068        self.buffer
 2069            .read(cx)
 2070            .excerpt_containing(self.selections.newest_anchor().head(), cx)
 2071    }
 2072
 2073    pub fn mode(&self) -> EditorMode {
 2074        self.mode
 2075    }
 2076
 2077    pub fn collaboration_hub(&self) -> Option<&dyn CollaborationHub> {
 2078        self.collaboration_hub.as_deref()
 2079    }
 2080
 2081    pub fn set_collaboration_hub(&mut self, hub: Box<dyn CollaborationHub>) {
 2082        self.collaboration_hub = Some(hub);
 2083    }
 2084
 2085    pub fn set_custom_context_menu(
 2086        &mut self,
 2087        f: impl 'static
 2088            + Fn(&mut Self, DisplayPoint, &mut ViewContext<Self>) -> Option<View<ui::ContextMenu>>,
 2089    ) {
 2090        self.custom_context_menu = Some(Box::new(f))
 2091    }
 2092
 2093    pub fn set_completion_provider(&mut self, provider: Box<dyn CompletionProvider>) {
 2094        self.completion_provider = Some(provider);
 2095    }
 2096
 2097    pub fn set_inline_completion_provider<T>(
 2098        &mut self,
 2099        provider: Option<Model<T>>,
 2100        cx: &mut ViewContext<Self>,
 2101    ) where
 2102        T: InlineCompletionProvider,
 2103    {
 2104        self.inline_completion_provider =
 2105            provider.map(|provider| RegisteredInlineCompletionProvider {
 2106                _subscription: cx.observe(&provider, |this, _, cx| {
 2107                    if this.focus_handle.is_focused(cx) {
 2108                        this.update_visible_inline_completion(cx);
 2109                    }
 2110                }),
 2111                provider: Arc::new(provider),
 2112            });
 2113        self.refresh_inline_completion(false, cx);
 2114    }
 2115
 2116    pub fn placeholder_text(&self, _cx: &mut WindowContext) -> Option<&str> {
 2117        self.placeholder_text.as_deref()
 2118    }
 2119
 2120    pub fn set_placeholder_text(
 2121        &mut self,
 2122        placeholder_text: impl Into<Arc<str>>,
 2123        cx: &mut ViewContext<Self>,
 2124    ) {
 2125        let placeholder_text = Some(placeholder_text.into());
 2126        if self.placeholder_text != placeholder_text {
 2127            self.placeholder_text = placeholder_text;
 2128            cx.notify();
 2129        }
 2130    }
 2131
 2132    pub fn set_cursor_shape(&mut self, cursor_shape: CursorShape, cx: &mut ViewContext<Self>) {
 2133        self.cursor_shape = cursor_shape;
 2134        cx.notify();
 2135    }
 2136
 2137    pub fn set_current_line_highlight(
 2138        &mut self,
 2139        current_line_highlight: Option<CurrentLineHighlight>,
 2140    ) {
 2141        self.current_line_highlight = current_line_highlight;
 2142    }
 2143
 2144    pub fn set_collapse_matches(&mut self, collapse_matches: bool) {
 2145        self.collapse_matches = collapse_matches;
 2146    }
 2147
 2148    pub fn range_for_match<T: std::marker::Copy>(&self, range: &Range<T>) -> Range<T> {
 2149        if self.collapse_matches {
 2150            return range.start..range.start;
 2151        }
 2152        range.clone()
 2153    }
 2154
 2155    pub fn set_clip_at_line_ends(&mut self, clip: bool, cx: &mut ViewContext<Self>) {
 2156        if self.display_map.read(cx).clip_at_line_ends != clip {
 2157            self.display_map
 2158                .update(cx, |map, _| map.clip_at_line_ends = clip);
 2159        }
 2160    }
 2161
 2162    pub fn set_keymap_context_layer<Tag: 'static>(
 2163        &mut self,
 2164        context: KeyContext,
 2165        cx: &mut ViewContext<Self>,
 2166    ) {
 2167        self.keymap_context_layers
 2168            .insert(TypeId::of::<Tag>(), context);
 2169        cx.notify();
 2170    }
 2171
 2172    pub fn remove_keymap_context_layer<Tag: 'static>(&mut self, cx: &mut ViewContext<Self>) {
 2173        self.keymap_context_layers.remove(&TypeId::of::<Tag>());
 2174        cx.notify();
 2175    }
 2176
 2177    pub fn set_input_enabled(&mut self, input_enabled: bool) {
 2178        self.input_enabled = input_enabled;
 2179    }
 2180
 2181    pub fn set_autoindent(&mut self, autoindent: bool) {
 2182        if autoindent {
 2183            self.autoindent_mode = Some(AutoindentMode::EachLine);
 2184        } else {
 2185            self.autoindent_mode = None;
 2186        }
 2187    }
 2188
 2189    pub fn read_only(&self, cx: &AppContext) -> bool {
 2190        self.read_only || self.buffer.read(cx).read_only()
 2191    }
 2192
 2193    pub fn set_read_only(&mut self, read_only: bool) {
 2194        self.read_only = read_only;
 2195    }
 2196
 2197    pub fn set_use_autoclose(&mut self, autoclose: bool) {
 2198        self.use_autoclose = autoclose;
 2199    }
 2200
 2201    pub fn set_use_auto_surround(&mut self, auto_surround: bool) {
 2202        self.use_auto_surround = auto_surround;
 2203    }
 2204
 2205    pub fn set_auto_replace_emoji_shortcode(&mut self, auto_replace: bool) {
 2206        self.auto_replace_emoji_shortcode = auto_replace;
 2207    }
 2208
 2209    pub fn set_show_inline_completions(&mut self, show_inline_completions: bool) {
 2210        self.show_inline_completions = show_inline_completions;
 2211    }
 2212
 2213    pub fn set_use_modal_editing(&mut self, to: bool) {
 2214        self.use_modal_editing = to;
 2215    }
 2216
 2217    pub fn use_modal_editing(&self) -> bool {
 2218        self.use_modal_editing
 2219    }
 2220
 2221    fn selections_did_change(
 2222        &mut self,
 2223        local: bool,
 2224        old_cursor_position: &Anchor,
 2225        show_completions: bool,
 2226        cx: &mut ViewContext<Self>,
 2227    ) {
 2228        // Copy selections to primary selection buffer
 2229        #[cfg(target_os = "linux")]
 2230        if local {
 2231            let selections = self.selections.all::<usize>(cx);
 2232            let buffer_handle = self.buffer.read(cx).read(cx);
 2233
 2234            let mut text = String::new();
 2235            for (index, selection) in selections.iter().enumerate() {
 2236                let text_for_selection = buffer_handle
 2237                    .text_for_range(selection.start..selection.end)
 2238                    .collect::<String>();
 2239
 2240                text.push_str(&text_for_selection);
 2241                if index != selections.len() - 1 {
 2242                    text.push('\n');
 2243                }
 2244            }
 2245
 2246            if !text.is_empty() {
 2247                cx.write_to_primary(ClipboardItem::new(text));
 2248            }
 2249        }
 2250
 2251        if self.focus_handle.is_focused(cx) && self.leader_peer_id.is_none() {
 2252            self.buffer.update(cx, |buffer, cx| {
 2253                buffer.set_active_selections(
 2254                    &self.selections.disjoint_anchors(),
 2255                    self.selections.line_mode,
 2256                    self.cursor_shape,
 2257                    cx,
 2258                )
 2259            });
 2260        }
 2261        let display_map = self
 2262            .display_map
 2263            .update(cx, |display_map, cx| display_map.snapshot(cx));
 2264        let buffer = &display_map.buffer_snapshot;
 2265        self.add_selections_state = None;
 2266        self.select_next_state = None;
 2267        self.select_prev_state = None;
 2268        self.select_larger_syntax_node_stack.clear();
 2269        self.invalidate_autoclose_regions(&self.selections.disjoint_anchors(), buffer);
 2270        self.snippet_stack
 2271            .invalidate(&self.selections.disjoint_anchors(), buffer);
 2272        self.take_rename(false, cx);
 2273
 2274        let new_cursor_position = self.selections.newest_anchor().head();
 2275
 2276        self.push_to_nav_history(
 2277            *old_cursor_position,
 2278            Some(new_cursor_position.to_point(buffer)),
 2279            cx,
 2280        );
 2281
 2282        if local {
 2283            let new_cursor_position = self.selections.newest_anchor().head();
 2284            let mut context_menu = self.context_menu.write();
 2285            let completion_menu = match context_menu.as_ref() {
 2286                Some(ContextMenu::Completions(menu)) => Some(menu),
 2287
 2288                _ => {
 2289                    *context_menu = None;
 2290                    None
 2291                }
 2292            };
 2293
 2294            if let Some(completion_menu) = completion_menu {
 2295                let cursor_position = new_cursor_position.to_offset(buffer);
 2296                let (word_range, kind) = buffer.surrounding_word(completion_menu.initial_position);
 2297                if kind == Some(CharKind::Word)
 2298                    && word_range.to_inclusive().contains(&cursor_position)
 2299                {
 2300                    let mut completion_menu = completion_menu.clone();
 2301                    drop(context_menu);
 2302
 2303                    let query = Self::completion_query(buffer, cursor_position);
 2304                    cx.spawn(move |this, mut cx| async move {
 2305                        completion_menu
 2306                            .filter(query.as_deref(), cx.background_executor().clone())
 2307                            .await;
 2308
 2309                        this.update(&mut cx, |this, cx| {
 2310                            let mut context_menu = this.context_menu.write();
 2311                            let Some(ContextMenu::Completions(menu)) = context_menu.as_ref() else {
 2312                                return;
 2313                            };
 2314
 2315                            if menu.id > completion_menu.id {
 2316                                return;
 2317                            }
 2318
 2319                            *context_menu = Some(ContextMenu::Completions(completion_menu));
 2320                            drop(context_menu);
 2321                            cx.notify();
 2322                        })
 2323                    })
 2324                    .detach();
 2325
 2326                    if show_completions {
 2327                        self.show_completions(&ShowCompletions { trigger: None }, cx);
 2328                    }
 2329                } else {
 2330                    drop(context_menu);
 2331                    self.hide_context_menu(cx);
 2332                }
 2333            } else {
 2334                drop(context_menu);
 2335            }
 2336
 2337            hide_hover(self, cx);
 2338
 2339            if old_cursor_position.to_display_point(&display_map).row()
 2340                != new_cursor_position.to_display_point(&display_map).row()
 2341            {
 2342                self.available_code_actions.take();
 2343            }
 2344            self.refresh_code_actions(cx);
 2345            self.refresh_document_highlights(cx);
 2346            refresh_matching_bracket_highlights(self, cx);
 2347            self.discard_inline_completion(false, cx);
 2348            linked_editing_ranges::refresh_linked_ranges(self, cx);
 2349            if self.git_blame_inline_enabled {
 2350                self.start_inline_blame_timer(cx);
 2351            }
 2352        }
 2353
 2354        self.blink_manager.update(cx, BlinkManager::pause_blinking);
 2355        cx.emit(EditorEvent::SelectionsChanged { local });
 2356
 2357        if self.selections.disjoint_anchors().len() == 1 {
 2358            cx.emit(SearchEvent::ActiveMatchChanged)
 2359        }
 2360        cx.notify();
 2361    }
 2362
 2363    pub fn change_selections<R>(
 2364        &mut self,
 2365        autoscroll: Option<Autoscroll>,
 2366        cx: &mut ViewContext<Self>,
 2367        change: impl FnOnce(&mut MutableSelectionsCollection<'_>) -> R,
 2368    ) -> R {
 2369        self.change_selections_inner(autoscroll, true, cx, change)
 2370    }
 2371
 2372    pub fn change_selections_inner<R>(
 2373        &mut self,
 2374        autoscroll: Option<Autoscroll>,
 2375        request_completions: bool,
 2376        cx: &mut ViewContext<Self>,
 2377        change: impl FnOnce(&mut MutableSelectionsCollection<'_>) -> R,
 2378    ) -> R {
 2379        let old_cursor_position = self.selections.newest_anchor().head();
 2380        self.push_to_selection_history();
 2381
 2382        let (changed, result) = self.selections.change_with(cx, change);
 2383
 2384        if changed {
 2385            if let Some(autoscroll) = autoscroll {
 2386                self.request_autoscroll(autoscroll, cx);
 2387            }
 2388            self.selections_did_change(true, &old_cursor_position, request_completions, cx);
 2389        }
 2390
 2391        result
 2392    }
 2393
 2394    pub fn edit<I, S, T>(&mut self, edits: I, cx: &mut ViewContext<Self>)
 2395    where
 2396        I: IntoIterator<Item = (Range<S>, T)>,
 2397        S: ToOffset,
 2398        T: Into<Arc<str>>,
 2399    {
 2400        if self.read_only(cx) {
 2401            return;
 2402        }
 2403
 2404        self.buffer
 2405            .update(cx, |buffer, cx| buffer.edit(edits, None, cx));
 2406    }
 2407
 2408    pub fn edit_with_autoindent<I, S, T>(&mut self, edits: I, cx: &mut ViewContext<Self>)
 2409    where
 2410        I: IntoIterator<Item = (Range<S>, T)>,
 2411        S: ToOffset,
 2412        T: Into<Arc<str>>,
 2413    {
 2414        if self.read_only(cx) {
 2415            return;
 2416        }
 2417
 2418        self.buffer.update(cx, |buffer, cx| {
 2419            buffer.edit(edits, self.autoindent_mode.clone(), cx)
 2420        });
 2421    }
 2422
 2423    pub fn edit_with_block_indent<I, S, T>(
 2424        &mut self,
 2425        edits: I,
 2426        original_indent_columns: Vec<u32>,
 2427        cx: &mut ViewContext<Self>,
 2428    ) where
 2429        I: IntoIterator<Item = (Range<S>, T)>,
 2430        S: ToOffset,
 2431        T: Into<Arc<str>>,
 2432    {
 2433        if self.read_only(cx) {
 2434            return;
 2435        }
 2436
 2437        self.buffer.update(cx, |buffer, cx| {
 2438            buffer.edit(
 2439                edits,
 2440                Some(AutoindentMode::Block {
 2441                    original_indent_columns,
 2442                }),
 2443                cx,
 2444            )
 2445        });
 2446    }
 2447
 2448    fn select(&mut self, phase: SelectPhase, cx: &mut ViewContext<Self>) {
 2449        self.hide_context_menu(cx);
 2450
 2451        match phase {
 2452            SelectPhase::Begin {
 2453                position,
 2454                add,
 2455                click_count,
 2456            } => self.begin_selection(position, add, click_count, cx),
 2457            SelectPhase::BeginColumnar {
 2458                position,
 2459                goal_column,
 2460                reset,
 2461            } => self.begin_columnar_selection(position, goal_column, reset, cx),
 2462            SelectPhase::Extend {
 2463                position,
 2464                click_count,
 2465            } => self.extend_selection(position, click_count, cx),
 2466            SelectPhase::Update {
 2467                position,
 2468                goal_column,
 2469                scroll_delta,
 2470            } => self.update_selection(position, goal_column, scroll_delta, cx),
 2471            SelectPhase::End => self.end_selection(cx),
 2472        }
 2473    }
 2474
 2475    fn extend_selection(
 2476        &mut self,
 2477        position: DisplayPoint,
 2478        click_count: usize,
 2479        cx: &mut ViewContext<Self>,
 2480    ) {
 2481        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 2482        let tail = self.selections.newest::<usize>(cx).tail();
 2483        self.begin_selection(position, false, click_count, cx);
 2484
 2485        let position = position.to_offset(&display_map, Bias::Left);
 2486        let tail_anchor = display_map.buffer_snapshot.anchor_before(tail);
 2487
 2488        let mut pending_selection = self
 2489            .selections
 2490            .pending_anchor()
 2491            .expect("extend_selection not called with pending selection");
 2492        if position >= tail {
 2493            pending_selection.start = tail_anchor;
 2494        } else {
 2495            pending_selection.end = tail_anchor;
 2496            pending_selection.reversed = true;
 2497        }
 2498
 2499        let mut pending_mode = self.selections.pending_mode().unwrap();
 2500        match &mut pending_mode {
 2501            SelectMode::Word(range) | SelectMode::Line(range) => *range = tail_anchor..tail_anchor,
 2502            _ => {}
 2503        }
 2504
 2505        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 2506            s.set_pending(pending_selection, pending_mode)
 2507        });
 2508    }
 2509
 2510    fn begin_selection(
 2511        &mut self,
 2512        position: DisplayPoint,
 2513        add: bool,
 2514        click_count: usize,
 2515        cx: &mut ViewContext<Self>,
 2516    ) {
 2517        if !self.focus_handle.is_focused(cx) {
 2518            self.last_focused_descendant = None;
 2519            cx.focus(&self.focus_handle);
 2520        }
 2521
 2522        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 2523        let buffer = &display_map.buffer_snapshot;
 2524        let newest_selection = self.selections.newest_anchor().clone();
 2525        let position = display_map.clip_point(position, Bias::Left);
 2526
 2527        let start;
 2528        let end;
 2529        let mode;
 2530        let auto_scroll;
 2531        match click_count {
 2532            1 => {
 2533                start = buffer.anchor_before(position.to_point(&display_map));
 2534                end = start;
 2535                mode = SelectMode::Character;
 2536                auto_scroll = true;
 2537            }
 2538            2 => {
 2539                let range = movement::surrounding_word(&display_map, position);
 2540                start = buffer.anchor_before(range.start.to_point(&display_map));
 2541                end = buffer.anchor_before(range.end.to_point(&display_map));
 2542                mode = SelectMode::Word(start..end);
 2543                auto_scroll = true;
 2544            }
 2545            3 => {
 2546                let position = display_map
 2547                    .clip_point(position, Bias::Left)
 2548                    .to_point(&display_map);
 2549                let line_start = display_map.prev_line_boundary(position).0;
 2550                let next_line_start = buffer.clip_point(
 2551                    display_map.next_line_boundary(position).0 + Point::new(1, 0),
 2552                    Bias::Left,
 2553                );
 2554                start = buffer.anchor_before(line_start);
 2555                end = buffer.anchor_before(next_line_start);
 2556                mode = SelectMode::Line(start..end);
 2557                auto_scroll = true;
 2558            }
 2559            _ => {
 2560                start = buffer.anchor_before(0);
 2561                end = buffer.anchor_before(buffer.len());
 2562                mode = SelectMode::All;
 2563                auto_scroll = false;
 2564            }
 2565        }
 2566
 2567        let point_to_delete: Option<usize> = {
 2568            let selected_points: Vec<Selection<Point>> =
 2569                self.selections.disjoint_in_range(start..end, cx);
 2570
 2571            if !add || click_count > 1 {
 2572                None
 2573            } else if selected_points.len() > 0 {
 2574                Some(selected_points[0].id)
 2575            } else {
 2576                let clicked_point_already_selected =
 2577                    self.selections.disjoint.iter().find(|selection| {
 2578                        selection.start.to_point(buffer) == start.to_point(buffer)
 2579                            || selection.end.to_point(buffer) == end.to_point(buffer)
 2580                    });
 2581
 2582                if let Some(selection) = clicked_point_already_selected {
 2583                    Some(selection.id)
 2584                } else {
 2585                    None
 2586                }
 2587            }
 2588        };
 2589
 2590        let selections_count = self.selections.count();
 2591
 2592        self.change_selections(auto_scroll.then(|| Autoscroll::newest()), cx, |s| {
 2593            if let Some(point_to_delete) = point_to_delete {
 2594                s.delete(point_to_delete);
 2595
 2596                if selections_count == 1 {
 2597                    s.set_pending_anchor_range(start..end, mode);
 2598                }
 2599            } else {
 2600                if !add {
 2601                    s.clear_disjoint();
 2602                } else if click_count > 1 {
 2603                    s.delete(newest_selection.id)
 2604                }
 2605
 2606                s.set_pending_anchor_range(start..end, mode);
 2607            }
 2608        });
 2609    }
 2610
 2611    fn begin_columnar_selection(
 2612        &mut self,
 2613        position: DisplayPoint,
 2614        goal_column: u32,
 2615        reset: bool,
 2616        cx: &mut ViewContext<Self>,
 2617    ) {
 2618        if !self.focus_handle.is_focused(cx) {
 2619            self.last_focused_descendant = None;
 2620            cx.focus(&self.focus_handle);
 2621        }
 2622
 2623        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 2624
 2625        if reset {
 2626            let pointer_position = display_map
 2627                .buffer_snapshot
 2628                .anchor_before(position.to_point(&display_map));
 2629
 2630            self.change_selections(Some(Autoscroll::newest()), cx, |s| {
 2631                s.clear_disjoint();
 2632                s.set_pending_anchor_range(
 2633                    pointer_position..pointer_position,
 2634                    SelectMode::Character,
 2635                );
 2636            });
 2637        }
 2638
 2639        let tail = self.selections.newest::<Point>(cx).tail();
 2640        self.columnar_selection_tail = Some(display_map.buffer_snapshot.anchor_before(tail));
 2641
 2642        if !reset {
 2643            self.select_columns(
 2644                tail.to_display_point(&display_map),
 2645                position,
 2646                goal_column,
 2647                &display_map,
 2648                cx,
 2649            );
 2650        }
 2651    }
 2652
 2653    fn update_selection(
 2654        &mut self,
 2655        position: DisplayPoint,
 2656        goal_column: u32,
 2657        scroll_delta: gpui::Point<f32>,
 2658        cx: &mut ViewContext<Self>,
 2659    ) {
 2660        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 2661
 2662        if let Some(tail) = self.columnar_selection_tail.as_ref() {
 2663            let tail = tail.to_display_point(&display_map);
 2664            self.select_columns(tail, position, goal_column, &display_map, cx);
 2665        } else if let Some(mut pending) = self.selections.pending_anchor() {
 2666            let buffer = self.buffer.read(cx).snapshot(cx);
 2667            let head;
 2668            let tail;
 2669            let mode = self.selections.pending_mode().unwrap();
 2670            match &mode {
 2671                SelectMode::Character => {
 2672                    head = position.to_point(&display_map);
 2673                    tail = pending.tail().to_point(&buffer);
 2674                }
 2675                SelectMode::Word(original_range) => {
 2676                    let original_display_range = original_range.start.to_display_point(&display_map)
 2677                        ..original_range.end.to_display_point(&display_map);
 2678                    let original_buffer_range = original_display_range.start.to_point(&display_map)
 2679                        ..original_display_range.end.to_point(&display_map);
 2680                    if movement::is_inside_word(&display_map, position)
 2681                        || original_display_range.contains(&position)
 2682                    {
 2683                        let word_range = movement::surrounding_word(&display_map, position);
 2684                        if word_range.start < original_display_range.start {
 2685                            head = word_range.start.to_point(&display_map);
 2686                        } else {
 2687                            head = word_range.end.to_point(&display_map);
 2688                        }
 2689                    } else {
 2690                        head = position.to_point(&display_map);
 2691                    }
 2692
 2693                    if head <= original_buffer_range.start {
 2694                        tail = original_buffer_range.end;
 2695                    } else {
 2696                        tail = original_buffer_range.start;
 2697                    }
 2698                }
 2699                SelectMode::Line(original_range) => {
 2700                    let original_range = original_range.to_point(&display_map.buffer_snapshot);
 2701
 2702                    let position = display_map
 2703                        .clip_point(position, Bias::Left)
 2704                        .to_point(&display_map);
 2705                    let line_start = display_map.prev_line_boundary(position).0;
 2706                    let next_line_start = buffer.clip_point(
 2707                        display_map.next_line_boundary(position).0 + Point::new(1, 0),
 2708                        Bias::Left,
 2709                    );
 2710
 2711                    if line_start < original_range.start {
 2712                        head = line_start
 2713                    } else {
 2714                        head = next_line_start
 2715                    }
 2716
 2717                    if head <= original_range.start {
 2718                        tail = original_range.end;
 2719                    } else {
 2720                        tail = original_range.start;
 2721                    }
 2722                }
 2723                SelectMode::All => {
 2724                    return;
 2725                }
 2726            };
 2727
 2728            if head < tail {
 2729                pending.start = buffer.anchor_before(head);
 2730                pending.end = buffer.anchor_before(tail);
 2731                pending.reversed = true;
 2732            } else {
 2733                pending.start = buffer.anchor_before(tail);
 2734                pending.end = buffer.anchor_before(head);
 2735                pending.reversed = false;
 2736            }
 2737
 2738            self.change_selections(None, cx, |s| {
 2739                s.set_pending(pending, mode);
 2740            });
 2741        } else {
 2742            log::error!("update_selection dispatched with no pending selection");
 2743            return;
 2744        }
 2745
 2746        self.apply_scroll_delta(scroll_delta, cx);
 2747        cx.notify();
 2748    }
 2749
 2750    fn end_selection(&mut self, cx: &mut ViewContext<Self>) {
 2751        self.columnar_selection_tail.take();
 2752        if self.selections.pending_anchor().is_some() {
 2753            let selections = self.selections.all::<usize>(cx);
 2754            self.change_selections(None, cx, |s| {
 2755                s.select(selections);
 2756                s.clear_pending();
 2757            });
 2758        }
 2759    }
 2760
 2761    fn select_columns(
 2762        &mut self,
 2763        tail: DisplayPoint,
 2764        head: DisplayPoint,
 2765        goal_column: u32,
 2766        display_map: &DisplaySnapshot,
 2767        cx: &mut ViewContext<Self>,
 2768    ) {
 2769        let start_row = cmp::min(tail.row(), head.row());
 2770        let end_row = cmp::max(tail.row(), head.row());
 2771        let start_column = cmp::min(tail.column(), goal_column);
 2772        let end_column = cmp::max(tail.column(), goal_column);
 2773        let reversed = start_column < tail.column();
 2774
 2775        let selection_ranges = (start_row.0..=end_row.0)
 2776            .map(DisplayRow)
 2777            .filter_map(|row| {
 2778                if start_column <= display_map.line_len(row) && !display_map.is_block_line(row) {
 2779                    let start = display_map
 2780                        .clip_point(DisplayPoint::new(row, start_column), Bias::Left)
 2781                        .to_point(display_map);
 2782                    let end = display_map
 2783                        .clip_point(DisplayPoint::new(row, end_column), Bias::Right)
 2784                        .to_point(display_map);
 2785                    if reversed {
 2786                        Some(end..start)
 2787                    } else {
 2788                        Some(start..end)
 2789                    }
 2790                } else {
 2791                    None
 2792                }
 2793            })
 2794            .collect::<Vec<_>>();
 2795
 2796        self.change_selections(None, cx, |s| {
 2797            s.select_ranges(selection_ranges);
 2798        });
 2799        cx.notify();
 2800    }
 2801
 2802    pub fn has_pending_nonempty_selection(&self) -> bool {
 2803        let pending_nonempty_selection = match self.selections.pending_anchor() {
 2804            Some(Selection { start, end, .. }) => start != end,
 2805            None => false,
 2806        };
 2807
 2808        pending_nonempty_selection
 2809            || (self.columnar_selection_tail.is_some() && self.selections.disjoint.len() > 1)
 2810    }
 2811
 2812    pub fn has_pending_selection(&self) -> bool {
 2813        self.selections.pending_anchor().is_some() || self.columnar_selection_tail.is_some()
 2814    }
 2815
 2816    pub fn cancel(&mut self, _: &Cancel, cx: &mut ViewContext<Self>) {
 2817        self.clear_expanded_diff_hunks(cx);
 2818        if self.dismiss_menus_and_popups(true, cx) {
 2819            return;
 2820        }
 2821
 2822        if self.mode == EditorMode::Full {
 2823            if self.change_selections(Some(Autoscroll::fit()), cx, |s| s.try_cancel()) {
 2824                return;
 2825            }
 2826        }
 2827
 2828        cx.propagate();
 2829    }
 2830
 2831    pub fn dismiss_menus_and_popups(
 2832        &mut self,
 2833        should_report_inline_completion_event: bool,
 2834        cx: &mut ViewContext<Self>,
 2835    ) -> bool {
 2836        if self.take_rename(false, cx).is_some() {
 2837            return true;
 2838        }
 2839
 2840        if hide_hover(self, cx) {
 2841            return true;
 2842        }
 2843
 2844        if self.hide_context_menu(cx).is_some() {
 2845            return true;
 2846        }
 2847
 2848        if self.discard_inline_completion(should_report_inline_completion_event, cx) {
 2849            return true;
 2850        }
 2851
 2852        if self.snippet_stack.pop().is_some() {
 2853            return true;
 2854        }
 2855
 2856        if self.mode == EditorMode::Full {
 2857            if self.active_diagnostics.is_some() {
 2858                self.dismiss_diagnostics(cx);
 2859                return true;
 2860            }
 2861        }
 2862
 2863        false
 2864    }
 2865
 2866    fn linked_editing_ranges_for(
 2867        &self,
 2868        selection: Range<text::Anchor>,
 2869        cx: &AppContext,
 2870    ) -> Option<HashMap<Model<Buffer>, Vec<Range<text::Anchor>>>> {
 2871        if self.linked_edit_ranges.is_empty() {
 2872            return None;
 2873        }
 2874        let ((base_range, linked_ranges), buffer_snapshot, buffer) =
 2875            selection.end.buffer_id.and_then(|end_buffer_id| {
 2876                if selection.start.buffer_id != Some(end_buffer_id) {
 2877                    return None;
 2878                }
 2879                let buffer = self.buffer.read(cx).buffer(end_buffer_id)?;
 2880                let snapshot = buffer.read(cx).snapshot();
 2881                self.linked_edit_ranges
 2882                    .get(end_buffer_id, selection.start..selection.end, &snapshot)
 2883                    .map(|ranges| (ranges, snapshot, buffer))
 2884            })?;
 2885        use text::ToOffset as TO;
 2886        // find offset from the start of current range to current cursor position
 2887        let start_byte_offset = TO::to_offset(&base_range.start, &buffer_snapshot);
 2888
 2889        let start_offset = TO::to_offset(&selection.start, &buffer_snapshot);
 2890        let start_difference = start_offset - start_byte_offset;
 2891        let end_offset = TO::to_offset(&selection.end, &buffer_snapshot);
 2892        let end_difference = end_offset - start_byte_offset;
 2893        // Current range has associated linked ranges.
 2894        let mut linked_edits = HashMap::<_, Vec<_>>::default();
 2895        for range in linked_ranges.iter() {
 2896            let start_offset = TO::to_offset(&range.start, &buffer_snapshot);
 2897            let end_offset = start_offset + end_difference;
 2898            let start_offset = start_offset + start_difference;
 2899            let start = buffer_snapshot.anchor_after(start_offset);
 2900            let end = buffer_snapshot.anchor_after(end_offset);
 2901            linked_edits
 2902                .entry(buffer.clone())
 2903                .or_default()
 2904                .push(start..end);
 2905        }
 2906        Some(linked_edits)
 2907    }
 2908
 2909    pub fn handle_input(&mut self, text: &str, cx: &mut ViewContext<Self>) {
 2910        let text: Arc<str> = text.into();
 2911
 2912        if self.read_only(cx) {
 2913            return;
 2914        }
 2915
 2916        let selections = self.selections.all_adjusted(cx);
 2917        let mut brace_inserted = false;
 2918        let mut edits = Vec::new();
 2919        let mut linked_edits = HashMap::<_, Vec<_>>::default();
 2920        let mut new_selections = Vec::with_capacity(selections.len());
 2921        let mut new_autoclose_regions = Vec::new();
 2922        let snapshot = self.buffer.read(cx).read(cx);
 2923
 2924        for (selection, autoclose_region) in
 2925            self.selections_with_autoclose_regions(selections, &snapshot)
 2926        {
 2927            if let Some(scope) = snapshot.language_scope_at(selection.head()) {
 2928                // Determine if the inserted text matches the opening or closing
 2929                // bracket of any of this language's bracket pairs.
 2930                let mut bracket_pair = None;
 2931                let mut is_bracket_pair_start = false;
 2932                let mut is_bracket_pair_end = false;
 2933                if !text.is_empty() {
 2934                    // `text` can be empty when a user is using IME (e.g. Chinese Wubi Simplified)
 2935                    //  and they are removing the character that triggered IME popup.
 2936                    for (pair, enabled) in scope.brackets() {
 2937                        if !pair.close && !pair.surround {
 2938                            continue;
 2939                        }
 2940
 2941                        if enabled && pair.start.ends_with(text.as_ref()) {
 2942                            bracket_pair = Some(pair.clone());
 2943                            is_bracket_pair_start = true;
 2944                            break;
 2945                        }
 2946                        if pair.end.as_str() == text.as_ref() {
 2947                            bracket_pair = Some(pair.clone());
 2948                            is_bracket_pair_end = true;
 2949                            break;
 2950                        }
 2951                    }
 2952                }
 2953
 2954                if let Some(bracket_pair) = bracket_pair {
 2955                    let snapshot_settings = snapshot.settings_at(selection.start, cx);
 2956                    let autoclose = self.use_autoclose && snapshot_settings.use_autoclose;
 2957                    let auto_surround =
 2958                        self.use_auto_surround && snapshot_settings.use_auto_surround;
 2959                    if selection.is_empty() {
 2960                        if is_bracket_pair_start {
 2961                            let prefix_len = bracket_pair.start.len() - text.len();
 2962
 2963                            // If the inserted text is a suffix of an opening bracket and the
 2964                            // selection is preceded by the rest of the opening bracket, then
 2965                            // insert the closing bracket.
 2966                            let following_text_allows_autoclose = snapshot
 2967                                .chars_at(selection.start)
 2968                                .next()
 2969                                .map_or(true, |c| scope.should_autoclose_before(c));
 2970                            let preceding_text_matches_prefix = prefix_len == 0
 2971                                || (selection.start.column >= (prefix_len as u32)
 2972                                    && snapshot.contains_str_at(
 2973                                        Point::new(
 2974                                            selection.start.row,
 2975                                            selection.start.column - (prefix_len as u32),
 2976                                        ),
 2977                                        &bracket_pair.start[..prefix_len],
 2978                                    ));
 2979                            if autoclose
 2980                                && bracket_pair.close
 2981                                && following_text_allows_autoclose
 2982                                && preceding_text_matches_prefix
 2983                            {
 2984                                let anchor = snapshot.anchor_before(selection.end);
 2985                                new_selections.push((selection.map(|_| anchor), text.len()));
 2986                                new_autoclose_regions.push((
 2987                                    anchor,
 2988                                    text.len(),
 2989                                    selection.id,
 2990                                    bracket_pair.clone(),
 2991                                ));
 2992                                edits.push((
 2993                                    selection.range(),
 2994                                    format!("{}{}", text, bracket_pair.end).into(),
 2995                                ));
 2996                                brace_inserted = true;
 2997                                continue;
 2998                            }
 2999                        }
 3000
 3001                        if let Some(region) = autoclose_region {
 3002                            // If the selection is followed by an auto-inserted closing bracket,
 3003                            // then don't insert that closing bracket again; just move the selection
 3004                            // past the closing bracket.
 3005                            let should_skip = selection.end == region.range.end.to_point(&snapshot)
 3006                                && text.as_ref() == region.pair.end.as_str();
 3007                            if should_skip {
 3008                                let anchor = snapshot.anchor_after(selection.end);
 3009                                new_selections
 3010                                    .push((selection.map(|_| anchor), region.pair.end.len()));
 3011                                continue;
 3012                            }
 3013                        }
 3014
 3015                        let always_treat_brackets_as_autoclosed = snapshot
 3016                            .settings_at(selection.start, cx)
 3017                            .always_treat_brackets_as_autoclosed;
 3018                        if always_treat_brackets_as_autoclosed
 3019                            && is_bracket_pair_end
 3020                            && snapshot.contains_str_at(selection.end, text.as_ref())
 3021                        {
 3022                            // Otherwise, when `always_treat_brackets_as_autoclosed` is set to `true
 3023                            // and the inserted text is a closing bracket and the selection is followed
 3024                            // by the closing bracket then move the selection past the closing bracket.
 3025                            let anchor = snapshot.anchor_after(selection.end);
 3026                            new_selections.push((selection.map(|_| anchor), text.len()));
 3027                            continue;
 3028                        }
 3029                    }
 3030                    // If an opening bracket is 1 character long and is typed while
 3031                    // text is selected, then surround that text with the bracket pair.
 3032                    else if auto_surround
 3033                        && bracket_pair.surround
 3034                        && is_bracket_pair_start
 3035                        && bracket_pair.start.chars().count() == 1
 3036                    {
 3037                        edits.push((selection.start..selection.start, text.clone()));
 3038                        edits.push((
 3039                            selection.end..selection.end,
 3040                            bracket_pair.end.as_str().into(),
 3041                        ));
 3042                        brace_inserted = true;
 3043                        new_selections.push((
 3044                            Selection {
 3045                                id: selection.id,
 3046                                start: snapshot.anchor_after(selection.start),
 3047                                end: snapshot.anchor_before(selection.end),
 3048                                reversed: selection.reversed,
 3049                                goal: selection.goal,
 3050                            },
 3051                            0,
 3052                        ));
 3053                        continue;
 3054                    }
 3055                }
 3056            }
 3057
 3058            if self.auto_replace_emoji_shortcode
 3059                && selection.is_empty()
 3060                && text.as_ref().ends_with(':')
 3061            {
 3062                if let Some(possible_emoji_short_code) =
 3063                    Self::find_possible_emoji_shortcode_at_position(&snapshot, selection.start)
 3064                {
 3065                    if !possible_emoji_short_code.is_empty() {
 3066                        if let Some(emoji) = emojis::get_by_shortcode(&possible_emoji_short_code) {
 3067                            let emoji_shortcode_start = Point::new(
 3068                                selection.start.row,
 3069                                selection.start.column - possible_emoji_short_code.len() as u32 - 1,
 3070                            );
 3071
 3072                            // Remove shortcode from buffer
 3073                            edits.push((
 3074                                emoji_shortcode_start..selection.start,
 3075                                "".to_string().into(),
 3076                            ));
 3077                            new_selections.push((
 3078                                Selection {
 3079                                    id: selection.id,
 3080                                    start: snapshot.anchor_after(emoji_shortcode_start),
 3081                                    end: snapshot.anchor_before(selection.start),
 3082                                    reversed: selection.reversed,
 3083                                    goal: selection.goal,
 3084                                },
 3085                                0,
 3086                            ));
 3087
 3088                            // Insert emoji
 3089                            let selection_start_anchor = snapshot.anchor_after(selection.start);
 3090                            new_selections.push((selection.map(|_| selection_start_anchor), 0));
 3091                            edits.push((selection.start..selection.end, emoji.to_string().into()));
 3092
 3093                            continue;
 3094                        }
 3095                    }
 3096                }
 3097            }
 3098
 3099            // If not handling any auto-close operation, then just replace the selected
 3100            // text with the given input and move the selection to the end of the
 3101            // newly inserted text.
 3102            let anchor = snapshot.anchor_after(selection.end);
 3103            if !self.linked_edit_ranges.is_empty() {
 3104                let start_anchor = snapshot.anchor_before(selection.start);
 3105                if let Some(ranges) =
 3106                    self.linked_editing_ranges_for(start_anchor.text_anchor..anchor.text_anchor, cx)
 3107                {
 3108                    for (buffer, edits) in ranges {
 3109                        linked_edits
 3110                            .entry(buffer.clone())
 3111                            .or_default()
 3112                            .extend(edits.into_iter().map(|range| (range, text.clone())));
 3113                    }
 3114                }
 3115            }
 3116
 3117            new_selections.push((selection.map(|_| anchor), 0));
 3118            edits.push((selection.start..selection.end, text.clone()));
 3119        }
 3120
 3121        drop(snapshot);
 3122
 3123        self.transact(cx, |this, cx| {
 3124            this.buffer.update(cx, |buffer, cx| {
 3125                buffer.edit(edits, this.autoindent_mode.clone(), cx);
 3126            });
 3127            for (buffer, edits) in linked_edits {
 3128                buffer.update(cx, |buffer, cx| {
 3129                    let snapshot = buffer.snapshot();
 3130                    let edits = edits
 3131                        .into_iter()
 3132                        .map(|(range, text)| {
 3133                            use text::ToPoint as TP;
 3134                            let end_point = TP::to_point(&range.end, &snapshot);
 3135                            let start_point = TP::to_point(&range.start, &snapshot);
 3136                            (start_point..end_point, text)
 3137                        })
 3138                        .sorted_by_key(|(range, _)| range.start)
 3139                        .collect::<Vec<_>>();
 3140                    buffer.edit(edits, None, cx);
 3141                })
 3142            }
 3143            let new_anchor_selections = new_selections.iter().map(|e| &e.0);
 3144            let new_selection_deltas = new_selections.iter().map(|e| e.1);
 3145            let snapshot = this.buffer.read(cx).read(cx);
 3146            let new_selections = resolve_multiple::<usize, _>(new_anchor_selections, &snapshot)
 3147                .zip(new_selection_deltas)
 3148                .map(|(selection, delta)| Selection {
 3149                    id: selection.id,
 3150                    start: selection.start + delta,
 3151                    end: selection.end + delta,
 3152                    reversed: selection.reversed,
 3153                    goal: SelectionGoal::None,
 3154                })
 3155                .collect::<Vec<_>>();
 3156
 3157            let mut i = 0;
 3158            for (position, delta, selection_id, pair) in new_autoclose_regions {
 3159                let position = position.to_offset(&snapshot) + delta;
 3160                let start = snapshot.anchor_before(position);
 3161                let end = snapshot.anchor_after(position);
 3162                while let Some(existing_state) = this.autoclose_regions.get(i) {
 3163                    match existing_state.range.start.cmp(&start, &snapshot) {
 3164                        Ordering::Less => i += 1,
 3165                        Ordering::Greater => break,
 3166                        Ordering::Equal => match end.cmp(&existing_state.range.end, &snapshot) {
 3167                            Ordering::Less => i += 1,
 3168                            Ordering::Equal => break,
 3169                            Ordering::Greater => break,
 3170                        },
 3171                    }
 3172                }
 3173                this.autoclose_regions.insert(
 3174                    i,
 3175                    AutocloseRegion {
 3176                        selection_id,
 3177                        range: start..end,
 3178                        pair,
 3179                    },
 3180                );
 3181            }
 3182
 3183            drop(snapshot);
 3184            let had_active_inline_completion = this.has_active_inline_completion(cx);
 3185            this.change_selections_inner(Some(Autoscroll::fit()), false, cx, |s| {
 3186                s.select(new_selections)
 3187            });
 3188
 3189            if !brace_inserted && EditorSettings::get_global(cx).use_on_type_format {
 3190                if let Some(on_type_format_task) =
 3191                    this.trigger_on_type_formatting(text.to_string(), cx)
 3192                {
 3193                    on_type_format_task.detach_and_log_err(cx);
 3194                }
 3195            }
 3196
 3197            let trigger_in_words = !had_active_inline_completion;
 3198            this.trigger_completion_on_input(&text, trigger_in_words, cx);
 3199            linked_editing_ranges::refresh_linked_ranges(this, cx);
 3200            this.refresh_inline_completion(true, cx);
 3201        });
 3202    }
 3203
 3204    fn find_possible_emoji_shortcode_at_position(
 3205        snapshot: &MultiBufferSnapshot,
 3206        position: Point,
 3207    ) -> Option<String> {
 3208        let mut chars = Vec::new();
 3209        let mut found_colon = false;
 3210        for char in snapshot.reversed_chars_at(position).take(100) {
 3211            // Found a possible emoji shortcode in the middle of the buffer
 3212            if found_colon {
 3213                if char.is_whitespace() {
 3214                    chars.reverse();
 3215                    return Some(chars.iter().collect());
 3216                }
 3217                // If the previous character is not a whitespace, we are in the middle of a word
 3218                // and we only want to complete the shortcode if the word is made up of other emojis
 3219                let mut containing_word = String::new();
 3220                for ch in snapshot
 3221                    .reversed_chars_at(position)
 3222                    .skip(chars.len() + 1)
 3223                    .take(100)
 3224                {
 3225                    if ch.is_whitespace() {
 3226                        break;
 3227                    }
 3228                    containing_word.push(ch);
 3229                }
 3230                let containing_word = containing_word.chars().rev().collect::<String>();
 3231                if util::word_consists_of_emojis(containing_word.as_str()) {
 3232                    chars.reverse();
 3233                    return Some(chars.iter().collect());
 3234                }
 3235            }
 3236
 3237            if char.is_whitespace() || !char.is_ascii() {
 3238                return None;
 3239            }
 3240            if char == ':' {
 3241                found_colon = true;
 3242            } else {
 3243                chars.push(char);
 3244            }
 3245        }
 3246        // Found a possible emoji shortcode at the beginning of the buffer
 3247        chars.reverse();
 3248        Some(chars.iter().collect())
 3249    }
 3250
 3251    pub fn newline(&mut self, _: &Newline, cx: &mut ViewContext<Self>) {
 3252        self.transact(cx, |this, cx| {
 3253            let (edits, selection_fixup_info): (Vec<_>, Vec<_>) = {
 3254                let selections = this.selections.all::<usize>(cx);
 3255                let multi_buffer = this.buffer.read(cx);
 3256                let buffer = multi_buffer.snapshot(cx);
 3257                selections
 3258                    .iter()
 3259                    .map(|selection| {
 3260                        let start_point = selection.start.to_point(&buffer);
 3261                        let mut indent =
 3262                            buffer.indent_size_for_line(MultiBufferRow(start_point.row));
 3263                        indent.len = cmp::min(indent.len, start_point.column);
 3264                        let start = selection.start;
 3265                        let end = selection.end;
 3266                        let selection_is_empty = start == end;
 3267                        let language_scope = buffer.language_scope_at(start);
 3268                        let (comment_delimiter, insert_extra_newline) = if let Some(language) =
 3269                            &language_scope
 3270                        {
 3271                            let leading_whitespace_len = buffer
 3272                                .reversed_chars_at(start)
 3273                                .take_while(|c| c.is_whitespace() && *c != '\n')
 3274                                .map(|c| c.len_utf8())
 3275                                .sum::<usize>();
 3276
 3277                            let trailing_whitespace_len = buffer
 3278                                .chars_at(end)
 3279                                .take_while(|c| c.is_whitespace() && *c != '\n')
 3280                                .map(|c| c.len_utf8())
 3281                                .sum::<usize>();
 3282
 3283                            let insert_extra_newline =
 3284                                language.brackets().any(|(pair, enabled)| {
 3285                                    let pair_start = pair.start.trim_end();
 3286                                    let pair_end = pair.end.trim_start();
 3287
 3288                                    enabled
 3289                                        && pair.newline
 3290                                        && buffer.contains_str_at(
 3291                                            end + trailing_whitespace_len,
 3292                                            pair_end,
 3293                                        )
 3294                                        && buffer.contains_str_at(
 3295                                            (start - leading_whitespace_len)
 3296                                                .saturating_sub(pair_start.len()),
 3297                                            pair_start,
 3298                                        )
 3299                                });
 3300
 3301                            // Comment extension on newline is allowed only for cursor selections
 3302                            let comment_delimiter = maybe!({
 3303                                if !selection_is_empty {
 3304                                    return None;
 3305                                }
 3306
 3307                                if !multi_buffer.settings_at(0, cx).extend_comment_on_newline {
 3308                                    return None;
 3309                                }
 3310
 3311                                let delimiters = language.line_comment_prefixes();
 3312                                let max_len_of_delimiter =
 3313                                    delimiters.iter().map(|delimiter| delimiter.len()).max()?;
 3314                                let (snapshot, range) =
 3315                                    buffer.buffer_line_for_row(MultiBufferRow(start_point.row))?;
 3316
 3317                                let mut index_of_first_non_whitespace = 0;
 3318                                let comment_candidate = snapshot
 3319                                    .chars_for_range(range)
 3320                                    .skip_while(|c| {
 3321                                        let should_skip = c.is_whitespace();
 3322                                        if should_skip {
 3323                                            index_of_first_non_whitespace += 1;
 3324                                        }
 3325                                        should_skip
 3326                                    })
 3327                                    .take(max_len_of_delimiter)
 3328                                    .collect::<String>();
 3329                                let comment_prefix = delimiters.iter().find(|comment_prefix| {
 3330                                    comment_candidate.starts_with(comment_prefix.as_ref())
 3331                                })?;
 3332                                let cursor_is_placed_after_comment_marker =
 3333                                    index_of_first_non_whitespace + comment_prefix.len()
 3334                                        <= start_point.column as usize;
 3335                                if cursor_is_placed_after_comment_marker {
 3336                                    Some(comment_prefix.clone())
 3337                                } else {
 3338                                    None
 3339                                }
 3340                            });
 3341                            (comment_delimiter, insert_extra_newline)
 3342                        } else {
 3343                            (None, false)
 3344                        };
 3345
 3346                        let capacity_for_delimiter = comment_delimiter
 3347                            .as_deref()
 3348                            .map(str::len)
 3349                            .unwrap_or_default();
 3350                        let mut new_text =
 3351                            String::with_capacity(1 + capacity_for_delimiter + indent.len as usize);
 3352                        new_text.push_str("\n");
 3353                        new_text.extend(indent.chars());
 3354                        if let Some(delimiter) = &comment_delimiter {
 3355                            new_text.push_str(&delimiter);
 3356                        }
 3357                        if insert_extra_newline {
 3358                            new_text = new_text.repeat(2);
 3359                        }
 3360
 3361                        let anchor = buffer.anchor_after(end);
 3362                        let new_selection = selection.map(|_| anchor);
 3363                        (
 3364                            (start..end, new_text),
 3365                            (insert_extra_newline, new_selection),
 3366                        )
 3367                    })
 3368                    .unzip()
 3369            };
 3370
 3371            this.edit_with_autoindent(edits, cx);
 3372            let buffer = this.buffer.read(cx).snapshot(cx);
 3373            let new_selections = selection_fixup_info
 3374                .into_iter()
 3375                .map(|(extra_newline_inserted, new_selection)| {
 3376                    let mut cursor = new_selection.end.to_point(&buffer);
 3377                    if extra_newline_inserted {
 3378                        cursor.row -= 1;
 3379                        cursor.column = buffer.line_len(MultiBufferRow(cursor.row));
 3380                    }
 3381                    new_selection.map(|_| cursor)
 3382                })
 3383                .collect();
 3384
 3385            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(new_selections));
 3386            this.refresh_inline_completion(true, cx);
 3387        });
 3388    }
 3389
 3390    pub fn newline_above(&mut self, _: &NewlineAbove, cx: &mut ViewContext<Self>) {
 3391        let buffer = self.buffer.read(cx);
 3392        let snapshot = buffer.snapshot(cx);
 3393
 3394        let mut edits = Vec::new();
 3395        let mut rows = Vec::new();
 3396
 3397        for (rows_inserted, selection) in self.selections.all_adjusted(cx).into_iter().enumerate() {
 3398            let cursor = selection.head();
 3399            let row = cursor.row;
 3400
 3401            let start_of_line = snapshot.clip_point(Point::new(row, 0), Bias::Left);
 3402
 3403            let newline = "\n".to_string();
 3404            edits.push((start_of_line..start_of_line, newline));
 3405
 3406            rows.push(row + rows_inserted as u32);
 3407        }
 3408
 3409        self.transact(cx, |editor, cx| {
 3410            editor.edit(edits, cx);
 3411
 3412            editor.change_selections(Some(Autoscroll::fit()), cx, |s| {
 3413                let mut index = 0;
 3414                s.move_cursors_with(|map, _, _| {
 3415                    let row = rows[index];
 3416                    index += 1;
 3417
 3418                    let point = Point::new(row, 0);
 3419                    let boundary = map.next_line_boundary(point).1;
 3420                    let clipped = map.clip_point(boundary, Bias::Left);
 3421
 3422                    (clipped, SelectionGoal::None)
 3423                });
 3424            });
 3425
 3426            let mut indent_edits = Vec::new();
 3427            let multibuffer_snapshot = editor.buffer.read(cx).snapshot(cx);
 3428            for row in rows {
 3429                let indents = multibuffer_snapshot.suggested_indents(row..row + 1, cx);
 3430                for (row, indent) in indents {
 3431                    if indent.len == 0 {
 3432                        continue;
 3433                    }
 3434
 3435                    let text = match indent.kind {
 3436                        IndentKind::Space => " ".repeat(indent.len as usize),
 3437                        IndentKind::Tab => "\t".repeat(indent.len as usize),
 3438                    };
 3439                    let point = Point::new(row.0, 0);
 3440                    indent_edits.push((point..point, text));
 3441                }
 3442            }
 3443            editor.edit(indent_edits, cx);
 3444        });
 3445    }
 3446
 3447    pub fn newline_below(&mut self, _: &NewlineBelow, cx: &mut ViewContext<Self>) {
 3448        let buffer = self.buffer.read(cx);
 3449        let snapshot = buffer.snapshot(cx);
 3450
 3451        let mut edits = Vec::new();
 3452        let mut rows = Vec::new();
 3453        let mut rows_inserted = 0;
 3454
 3455        for selection in self.selections.all_adjusted(cx) {
 3456            let cursor = selection.head();
 3457            let row = cursor.row;
 3458
 3459            let point = Point::new(row + 1, 0);
 3460            let start_of_line = snapshot.clip_point(point, Bias::Left);
 3461
 3462            let newline = "\n".to_string();
 3463            edits.push((start_of_line..start_of_line, newline));
 3464
 3465            rows_inserted += 1;
 3466            rows.push(row + rows_inserted);
 3467        }
 3468
 3469        self.transact(cx, |editor, cx| {
 3470            editor.edit(edits, cx);
 3471
 3472            editor.change_selections(Some(Autoscroll::fit()), cx, |s| {
 3473                let mut index = 0;
 3474                s.move_cursors_with(|map, _, _| {
 3475                    let row = rows[index];
 3476                    index += 1;
 3477
 3478                    let point = Point::new(row, 0);
 3479                    let boundary = map.next_line_boundary(point).1;
 3480                    let clipped = map.clip_point(boundary, Bias::Left);
 3481
 3482                    (clipped, SelectionGoal::None)
 3483                });
 3484            });
 3485
 3486            let mut indent_edits = Vec::new();
 3487            let multibuffer_snapshot = editor.buffer.read(cx).snapshot(cx);
 3488            for row in rows {
 3489                let indents = multibuffer_snapshot.suggested_indents(row..row + 1, cx);
 3490                for (row, indent) in indents {
 3491                    if indent.len == 0 {
 3492                        continue;
 3493                    }
 3494
 3495                    let text = match indent.kind {
 3496                        IndentKind::Space => " ".repeat(indent.len as usize),
 3497                        IndentKind::Tab => "\t".repeat(indent.len as usize),
 3498                    };
 3499                    let point = Point::new(row.0, 0);
 3500                    indent_edits.push((point..point, text));
 3501                }
 3502            }
 3503            editor.edit(indent_edits, cx);
 3504        });
 3505    }
 3506
 3507    pub fn insert(&mut self, text: &str, cx: &mut ViewContext<Self>) {
 3508        let autoindent = text.is_empty().not().then(|| AutoindentMode::Block {
 3509            original_indent_columns: Vec::new(),
 3510        });
 3511        self.insert_with_autoindent_mode(text, autoindent, cx);
 3512    }
 3513
 3514    fn insert_with_autoindent_mode(
 3515        &mut self,
 3516        text: &str,
 3517        autoindent_mode: Option<AutoindentMode>,
 3518        cx: &mut ViewContext<Self>,
 3519    ) {
 3520        if self.read_only(cx) {
 3521            return;
 3522        }
 3523
 3524        let text: Arc<str> = text.into();
 3525        self.transact(cx, |this, cx| {
 3526            let old_selections = this.selections.all_adjusted(cx);
 3527            let selection_anchors = this.buffer.update(cx, |buffer, cx| {
 3528                let anchors = {
 3529                    let snapshot = buffer.read(cx);
 3530                    old_selections
 3531                        .iter()
 3532                        .map(|s| {
 3533                            let anchor = snapshot.anchor_after(s.head());
 3534                            s.map(|_| anchor)
 3535                        })
 3536                        .collect::<Vec<_>>()
 3537                };
 3538                buffer.edit(
 3539                    old_selections
 3540                        .iter()
 3541                        .map(|s| (s.start..s.end, text.clone())),
 3542                    autoindent_mode,
 3543                    cx,
 3544                );
 3545                anchors
 3546            });
 3547
 3548            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 3549                s.select_anchors(selection_anchors);
 3550            })
 3551        });
 3552    }
 3553
 3554    fn trigger_completion_on_input(
 3555        &mut self,
 3556        text: &str,
 3557        trigger_in_words: bool,
 3558        cx: &mut ViewContext<Self>,
 3559    ) {
 3560        if self.is_completion_trigger(text, trigger_in_words, cx) {
 3561            self.show_completions(
 3562                &ShowCompletions {
 3563                    trigger: text.chars().last(),
 3564                },
 3565                cx,
 3566            );
 3567        } else {
 3568            self.hide_context_menu(cx);
 3569        }
 3570    }
 3571
 3572    fn is_completion_trigger(
 3573        &self,
 3574        text: &str,
 3575        trigger_in_words: bool,
 3576        cx: &mut ViewContext<Self>,
 3577    ) -> bool {
 3578        let position = self.selections.newest_anchor().head();
 3579        let multibuffer = self.buffer.read(cx);
 3580        let Some(buffer) = position
 3581            .buffer_id
 3582            .and_then(|buffer_id| multibuffer.buffer(buffer_id).clone())
 3583        else {
 3584            return false;
 3585        };
 3586
 3587        if let Some(completion_provider) = &self.completion_provider {
 3588            completion_provider.is_completion_trigger(
 3589                &buffer,
 3590                position.text_anchor,
 3591                text,
 3592                trigger_in_words,
 3593                cx,
 3594            )
 3595        } else {
 3596            false
 3597        }
 3598    }
 3599
 3600    /// If any empty selections is touching the start of its innermost containing autoclose
 3601    /// region, expand it to select the brackets.
 3602    fn select_autoclose_pair(&mut self, cx: &mut ViewContext<Self>) {
 3603        let selections = self.selections.all::<usize>(cx);
 3604        let buffer = self.buffer.read(cx).read(cx);
 3605        let new_selections = self
 3606            .selections_with_autoclose_regions(selections, &buffer)
 3607            .map(|(mut selection, region)| {
 3608                if !selection.is_empty() {
 3609                    return selection;
 3610                }
 3611
 3612                if let Some(region) = region {
 3613                    let mut range = region.range.to_offset(&buffer);
 3614                    if selection.start == range.start && range.start >= region.pair.start.len() {
 3615                        range.start -= region.pair.start.len();
 3616                        if buffer.contains_str_at(range.start, &region.pair.start)
 3617                            && buffer.contains_str_at(range.end, &region.pair.end)
 3618                        {
 3619                            range.end += region.pair.end.len();
 3620                            selection.start = range.start;
 3621                            selection.end = range.end;
 3622
 3623                            return selection;
 3624                        }
 3625                    }
 3626                }
 3627
 3628                let always_treat_brackets_as_autoclosed = buffer
 3629                    .settings_at(selection.start, cx)
 3630                    .always_treat_brackets_as_autoclosed;
 3631
 3632                if !always_treat_brackets_as_autoclosed {
 3633                    return selection;
 3634                }
 3635
 3636                if let Some(scope) = buffer.language_scope_at(selection.start) {
 3637                    for (pair, enabled) in scope.brackets() {
 3638                        if !enabled || !pair.close {
 3639                            continue;
 3640                        }
 3641
 3642                        if buffer.contains_str_at(selection.start, &pair.end) {
 3643                            let pair_start_len = pair.start.len();
 3644                            if buffer.contains_str_at(selection.start - pair_start_len, &pair.start)
 3645                            {
 3646                                selection.start -= pair_start_len;
 3647                                selection.end += pair.end.len();
 3648
 3649                                return selection;
 3650                            }
 3651                        }
 3652                    }
 3653                }
 3654
 3655                selection
 3656            })
 3657            .collect();
 3658
 3659        drop(buffer);
 3660        self.change_selections(None, cx, |selections| selections.select(new_selections));
 3661    }
 3662
 3663    /// Iterate the given selections, and for each one, find the smallest surrounding
 3664    /// autoclose region. This uses the ordering of the selections and the autoclose
 3665    /// regions to avoid repeated comparisons.
 3666    fn selections_with_autoclose_regions<'a, D: ToOffset + Clone>(
 3667        &'a self,
 3668        selections: impl IntoIterator<Item = Selection<D>>,
 3669        buffer: &'a MultiBufferSnapshot,
 3670    ) -> impl Iterator<Item = (Selection<D>, Option<&'a AutocloseRegion>)> {
 3671        let mut i = 0;
 3672        let mut regions = self.autoclose_regions.as_slice();
 3673        selections.into_iter().map(move |selection| {
 3674            let range = selection.start.to_offset(buffer)..selection.end.to_offset(buffer);
 3675
 3676            let mut enclosing = None;
 3677            while let Some(pair_state) = regions.get(i) {
 3678                if pair_state.range.end.to_offset(buffer) < range.start {
 3679                    regions = &regions[i + 1..];
 3680                    i = 0;
 3681                } else if pair_state.range.start.to_offset(buffer) > range.end {
 3682                    break;
 3683                } else {
 3684                    if pair_state.selection_id == selection.id {
 3685                        enclosing = Some(pair_state);
 3686                    }
 3687                    i += 1;
 3688                }
 3689            }
 3690
 3691            (selection.clone(), enclosing)
 3692        })
 3693    }
 3694
 3695    /// Remove any autoclose regions that no longer contain their selection.
 3696    fn invalidate_autoclose_regions(
 3697        &mut self,
 3698        mut selections: &[Selection<Anchor>],
 3699        buffer: &MultiBufferSnapshot,
 3700    ) {
 3701        self.autoclose_regions.retain(|state| {
 3702            let mut i = 0;
 3703            while let Some(selection) = selections.get(i) {
 3704                if selection.end.cmp(&state.range.start, buffer).is_lt() {
 3705                    selections = &selections[1..];
 3706                    continue;
 3707                }
 3708                if selection.start.cmp(&state.range.end, buffer).is_gt() {
 3709                    break;
 3710                }
 3711                if selection.id == state.selection_id {
 3712                    return true;
 3713                } else {
 3714                    i += 1;
 3715                }
 3716            }
 3717            false
 3718        });
 3719    }
 3720
 3721    fn completion_query(buffer: &MultiBufferSnapshot, position: impl ToOffset) -> Option<String> {
 3722        let offset = position.to_offset(buffer);
 3723        let (word_range, kind) = buffer.surrounding_word(offset);
 3724        if offset > word_range.start && kind == Some(CharKind::Word) {
 3725            Some(
 3726                buffer
 3727                    .text_for_range(word_range.start..offset)
 3728                    .collect::<String>(),
 3729            )
 3730        } else {
 3731            None
 3732        }
 3733    }
 3734
 3735    pub fn toggle_inlay_hints(&mut self, _: &ToggleInlayHints, cx: &mut ViewContext<Self>) {
 3736        self.refresh_inlay_hints(
 3737            InlayHintRefreshReason::Toggle(!self.inlay_hint_cache.enabled),
 3738            cx,
 3739        );
 3740    }
 3741
 3742    pub fn inlay_hints_enabled(&self) -> bool {
 3743        self.inlay_hint_cache.enabled
 3744    }
 3745
 3746    fn refresh_inlay_hints(&mut self, reason: InlayHintRefreshReason, cx: &mut ViewContext<Self>) {
 3747        if self.project.is_none() || self.mode != EditorMode::Full {
 3748            return;
 3749        }
 3750
 3751        let reason_description = reason.description();
 3752        let ignore_debounce = matches!(
 3753            reason,
 3754            InlayHintRefreshReason::SettingsChange(_)
 3755                | InlayHintRefreshReason::Toggle(_)
 3756                | InlayHintRefreshReason::ExcerptsRemoved(_)
 3757        );
 3758        let (invalidate_cache, required_languages) = match reason {
 3759            InlayHintRefreshReason::Toggle(enabled) => {
 3760                self.inlay_hint_cache.enabled = enabled;
 3761                if enabled {
 3762                    (InvalidationStrategy::RefreshRequested, None)
 3763                } else {
 3764                    self.inlay_hint_cache.clear();
 3765                    self.splice_inlays(
 3766                        self.visible_inlay_hints(cx)
 3767                            .iter()
 3768                            .map(|inlay| inlay.id)
 3769                            .collect(),
 3770                        Vec::new(),
 3771                        cx,
 3772                    );
 3773                    return;
 3774                }
 3775            }
 3776            InlayHintRefreshReason::SettingsChange(new_settings) => {
 3777                match self.inlay_hint_cache.update_settings(
 3778                    &self.buffer,
 3779                    new_settings,
 3780                    self.visible_inlay_hints(cx),
 3781                    cx,
 3782                ) {
 3783                    ControlFlow::Break(Some(InlaySplice {
 3784                        to_remove,
 3785                        to_insert,
 3786                    })) => {
 3787                        self.splice_inlays(to_remove, to_insert, cx);
 3788                        return;
 3789                    }
 3790                    ControlFlow::Break(None) => return,
 3791                    ControlFlow::Continue(()) => (InvalidationStrategy::RefreshRequested, None),
 3792                }
 3793            }
 3794            InlayHintRefreshReason::ExcerptsRemoved(excerpts_removed) => {
 3795                if let Some(InlaySplice {
 3796                    to_remove,
 3797                    to_insert,
 3798                }) = self.inlay_hint_cache.remove_excerpts(excerpts_removed)
 3799                {
 3800                    self.splice_inlays(to_remove, to_insert, cx);
 3801                }
 3802                return;
 3803            }
 3804            InlayHintRefreshReason::NewLinesShown => (InvalidationStrategy::None, None),
 3805            InlayHintRefreshReason::BufferEdited(buffer_languages) => {
 3806                (InvalidationStrategy::BufferEdited, Some(buffer_languages))
 3807            }
 3808            InlayHintRefreshReason::RefreshRequested => {
 3809                (InvalidationStrategy::RefreshRequested, None)
 3810            }
 3811        };
 3812
 3813        if let Some(InlaySplice {
 3814            to_remove,
 3815            to_insert,
 3816        }) = self.inlay_hint_cache.spawn_hint_refresh(
 3817            reason_description,
 3818            self.excerpts_for_inlay_hints_query(required_languages.as_ref(), cx),
 3819            invalidate_cache,
 3820            ignore_debounce,
 3821            cx,
 3822        ) {
 3823            self.splice_inlays(to_remove, to_insert, cx);
 3824        }
 3825    }
 3826
 3827    fn visible_inlay_hints(&self, cx: &ViewContext<'_, Editor>) -> Vec<Inlay> {
 3828        self.display_map
 3829            .read(cx)
 3830            .current_inlays()
 3831            .filter(move |inlay| matches!(inlay.id, InlayId::Hint(_)))
 3832            .cloned()
 3833            .collect()
 3834    }
 3835
 3836    pub fn excerpts_for_inlay_hints_query(
 3837        &self,
 3838        restrict_to_languages: Option<&HashSet<Arc<Language>>>,
 3839        cx: &mut ViewContext<Editor>,
 3840    ) -> HashMap<ExcerptId, (Model<Buffer>, clock::Global, Range<usize>)> {
 3841        let Some(project) = self.project.as_ref() else {
 3842            return HashMap::default();
 3843        };
 3844        let project = project.read(cx);
 3845        let multi_buffer = self.buffer().read(cx);
 3846        let multi_buffer_snapshot = multi_buffer.snapshot(cx);
 3847        let multi_buffer_visible_start = self
 3848            .scroll_manager
 3849            .anchor()
 3850            .anchor
 3851            .to_point(&multi_buffer_snapshot);
 3852        let multi_buffer_visible_end = multi_buffer_snapshot.clip_point(
 3853            multi_buffer_visible_start
 3854                + Point::new(self.visible_line_count().unwrap_or(0.).ceil() as u32, 0),
 3855            Bias::Left,
 3856        );
 3857        let multi_buffer_visible_range = multi_buffer_visible_start..multi_buffer_visible_end;
 3858        multi_buffer
 3859            .range_to_buffer_ranges(multi_buffer_visible_range, cx)
 3860            .into_iter()
 3861            .filter(|(_, excerpt_visible_range, _)| !excerpt_visible_range.is_empty())
 3862            .filter_map(|(buffer_handle, excerpt_visible_range, excerpt_id)| {
 3863                let buffer = buffer_handle.read(cx);
 3864                let buffer_file = project::File::from_dyn(buffer.file())?;
 3865                let buffer_worktree = project.worktree_for_id(buffer_file.worktree_id(cx), cx)?;
 3866                let worktree_entry = buffer_worktree
 3867                    .read(cx)
 3868                    .entry_for_id(buffer_file.project_entry_id(cx)?)?;
 3869                if worktree_entry.is_ignored {
 3870                    return None;
 3871                }
 3872
 3873                let language = buffer.language()?;
 3874                if let Some(restrict_to_languages) = restrict_to_languages {
 3875                    if !restrict_to_languages.contains(language) {
 3876                        return None;
 3877                    }
 3878                }
 3879                Some((
 3880                    excerpt_id,
 3881                    (
 3882                        buffer_handle,
 3883                        buffer.version().clone(),
 3884                        excerpt_visible_range,
 3885                    ),
 3886                ))
 3887            })
 3888            .collect()
 3889    }
 3890
 3891    pub fn text_layout_details(&self, cx: &WindowContext) -> TextLayoutDetails {
 3892        TextLayoutDetails {
 3893            text_system: cx.text_system().clone(),
 3894            editor_style: self.style.clone().unwrap(),
 3895            rem_size: cx.rem_size(),
 3896            scroll_anchor: self.scroll_manager.anchor(),
 3897            visible_rows: self.visible_line_count(),
 3898            vertical_scroll_margin: self.scroll_manager.vertical_scroll_margin,
 3899        }
 3900    }
 3901
 3902    fn splice_inlays(
 3903        &self,
 3904        to_remove: Vec<InlayId>,
 3905        to_insert: Vec<Inlay>,
 3906        cx: &mut ViewContext<Self>,
 3907    ) {
 3908        self.display_map.update(cx, |display_map, cx| {
 3909            display_map.splice_inlays(to_remove, to_insert, cx);
 3910        });
 3911        cx.notify();
 3912    }
 3913
 3914    fn trigger_on_type_formatting(
 3915        &self,
 3916        input: String,
 3917        cx: &mut ViewContext<Self>,
 3918    ) -> Option<Task<Result<()>>> {
 3919        if input.len() != 1 {
 3920            return None;
 3921        }
 3922
 3923        let project = self.project.as_ref()?;
 3924        let position = self.selections.newest_anchor().head();
 3925        let (buffer, buffer_position) = self
 3926            .buffer
 3927            .read(cx)
 3928            .text_anchor_for_position(position, cx)?;
 3929
 3930        // OnTypeFormatting returns a list of edits, no need to pass them between Zed instances,
 3931        // hence we do LSP request & edit on host side only — add formats to host's history.
 3932        let push_to_lsp_host_history = true;
 3933        // If this is not the host, append its history with new edits.
 3934        let push_to_client_history = project.read(cx).is_remote();
 3935
 3936        let on_type_formatting = project.update(cx, |project, cx| {
 3937            project.on_type_format(
 3938                buffer.clone(),
 3939                buffer_position,
 3940                input,
 3941                push_to_lsp_host_history,
 3942                cx,
 3943            )
 3944        });
 3945        Some(cx.spawn(|editor, mut cx| async move {
 3946            if let Some(transaction) = on_type_formatting.await? {
 3947                if push_to_client_history {
 3948                    buffer
 3949                        .update(&mut cx, |buffer, _| {
 3950                            buffer.push_transaction(transaction, Instant::now());
 3951                        })
 3952                        .ok();
 3953                }
 3954                editor.update(&mut cx, |editor, cx| {
 3955                    editor.refresh_document_highlights(cx);
 3956                })?;
 3957            }
 3958            Ok(())
 3959        }))
 3960    }
 3961
 3962    pub fn show_completions(&mut self, options: &ShowCompletions, cx: &mut ViewContext<Self>) {
 3963        if self.pending_rename.is_some() {
 3964            return;
 3965        }
 3966
 3967        let Some(provider) = self.completion_provider.as_ref() else {
 3968            return;
 3969        };
 3970
 3971        let position = self.selections.newest_anchor().head();
 3972        let (buffer, buffer_position) =
 3973            if let Some(output) = self.buffer.read(cx).text_anchor_for_position(position, cx) {
 3974                output
 3975            } else {
 3976                return;
 3977            };
 3978
 3979        let query = Self::completion_query(&self.buffer.read(cx).read(cx), position);
 3980        let is_followup_invoke = {
 3981            let context_menu_state = self.context_menu.read();
 3982            matches!(
 3983                context_menu_state.deref(),
 3984                Some(ContextMenu::Completions(_))
 3985            )
 3986        };
 3987        let trigger_kind = match (options.trigger, is_followup_invoke) {
 3988            (_, true) => CompletionTriggerKind::TRIGGER_FOR_INCOMPLETE_COMPLETIONS,
 3989            (Some(_), _) => CompletionTriggerKind::TRIGGER_CHARACTER,
 3990            _ => CompletionTriggerKind::INVOKED,
 3991        };
 3992        let completion_context = CompletionContext {
 3993            trigger_character: options.trigger.and_then(|c| {
 3994                if trigger_kind == CompletionTriggerKind::TRIGGER_CHARACTER {
 3995                    Some(String::from(c))
 3996                } else {
 3997                    None
 3998                }
 3999            }),
 4000            trigger_kind,
 4001        };
 4002        let completions = provider.completions(&buffer, buffer_position, completion_context, cx);
 4003
 4004        let id = post_inc(&mut self.next_completion_id);
 4005        let task = cx.spawn(|this, mut cx| {
 4006            async move {
 4007                this.update(&mut cx, |this, _| {
 4008                    this.completion_tasks.retain(|(task_id, _)| *task_id >= id);
 4009                })?;
 4010                let completions = completions.await.log_err();
 4011                let menu = if let Some(completions) = completions {
 4012                    let mut menu = CompletionsMenu {
 4013                        id,
 4014                        initial_position: position,
 4015                        match_candidates: completions
 4016                            .iter()
 4017                            .enumerate()
 4018                            .map(|(id, completion)| {
 4019                                StringMatchCandidate::new(
 4020                                    id,
 4021                                    completion.label.text[completion.label.filter_range.clone()]
 4022                                        .into(),
 4023                                )
 4024                            })
 4025                            .collect(),
 4026                        buffer: buffer.clone(),
 4027                        completions: Arc::new(RwLock::new(completions.into())),
 4028                        matches: Vec::new().into(),
 4029                        selected_item: 0,
 4030                        scroll_handle: UniformListScrollHandle::new(),
 4031                        selected_completion_documentation_resolve_debounce: Arc::new(Mutex::new(
 4032                            DebouncedDelay::new(),
 4033                        )),
 4034                    };
 4035                    menu.filter(query.as_deref(), cx.background_executor().clone())
 4036                        .await;
 4037
 4038                    if menu.matches.is_empty() {
 4039                        None
 4040                    } else {
 4041                        this.update(&mut cx, |editor, cx| {
 4042                            let completions = menu.completions.clone();
 4043                            let matches = menu.matches.clone();
 4044
 4045                            let delay_ms = EditorSettings::get_global(cx)
 4046                                .completion_documentation_secondary_query_debounce;
 4047                            let delay = Duration::from_millis(delay_ms);
 4048                            editor
 4049                                .completion_documentation_pre_resolve_debounce
 4050                                .fire_new(delay, cx, |editor, cx| {
 4051                                    CompletionsMenu::pre_resolve_completion_documentation(
 4052                                        buffer,
 4053                                        completions,
 4054                                        matches,
 4055                                        editor,
 4056                                        cx,
 4057                                    )
 4058                                });
 4059                        })
 4060                        .ok();
 4061                        Some(menu)
 4062                    }
 4063                } else {
 4064                    None
 4065                };
 4066
 4067                this.update(&mut cx, |this, cx| {
 4068                    let mut context_menu = this.context_menu.write();
 4069                    match context_menu.as_ref() {
 4070                        None => {}
 4071
 4072                        Some(ContextMenu::Completions(prev_menu)) => {
 4073                            if prev_menu.id > id {
 4074                                return;
 4075                            }
 4076                        }
 4077
 4078                        _ => return,
 4079                    }
 4080
 4081                    if this.focus_handle.is_focused(cx) && menu.is_some() {
 4082                        let menu = menu.unwrap();
 4083                        *context_menu = Some(ContextMenu::Completions(menu));
 4084                        drop(context_menu);
 4085                        this.discard_inline_completion(false, cx);
 4086                        cx.notify();
 4087                    } else if this.completion_tasks.len() <= 1 {
 4088                        // If there are no more completion tasks and the last menu was
 4089                        // empty, we should hide it. If it was already hidden, we should
 4090                        // also show the copilot completion when available.
 4091                        drop(context_menu);
 4092                        if this.hide_context_menu(cx).is_none() {
 4093                            this.update_visible_inline_completion(cx);
 4094                        }
 4095                    }
 4096                })?;
 4097
 4098                Ok::<_, anyhow::Error>(())
 4099            }
 4100            .log_err()
 4101        });
 4102
 4103        self.completion_tasks.push((id, task));
 4104    }
 4105
 4106    pub fn confirm_completion(
 4107        &mut self,
 4108        action: &ConfirmCompletion,
 4109        cx: &mut ViewContext<Self>,
 4110    ) -> Option<Task<Result<()>>> {
 4111        use language::ToOffset as _;
 4112
 4113        let completions_menu = if let ContextMenu::Completions(menu) = self.hide_context_menu(cx)? {
 4114            menu
 4115        } else {
 4116            return None;
 4117        };
 4118
 4119        let mat = completions_menu
 4120            .matches
 4121            .get(action.item_ix.unwrap_or(completions_menu.selected_item))?;
 4122        let buffer_handle = completions_menu.buffer;
 4123        let completions = completions_menu.completions.read();
 4124        let completion = completions.get(mat.candidate_id)?;
 4125        cx.stop_propagation();
 4126
 4127        let snippet;
 4128        let text;
 4129
 4130        if completion.is_snippet() {
 4131            snippet = Some(Snippet::parse(&completion.new_text).log_err()?);
 4132            text = snippet.as_ref().unwrap().text.clone();
 4133        } else {
 4134            snippet = None;
 4135            text = completion.new_text.clone();
 4136        };
 4137        let selections = self.selections.all::<usize>(cx);
 4138        let buffer = buffer_handle.read(cx);
 4139        let old_range = completion.old_range.to_offset(buffer);
 4140        let old_text = buffer.text_for_range(old_range.clone()).collect::<String>();
 4141
 4142        let newest_selection = self.selections.newest_anchor();
 4143        if newest_selection.start.buffer_id != Some(buffer_handle.read(cx).remote_id()) {
 4144            return None;
 4145        }
 4146
 4147        let lookbehind = newest_selection
 4148            .start
 4149            .text_anchor
 4150            .to_offset(buffer)
 4151            .saturating_sub(old_range.start);
 4152        let lookahead = old_range
 4153            .end
 4154            .saturating_sub(newest_selection.end.text_anchor.to_offset(buffer));
 4155        let mut common_prefix_len = old_text
 4156            .bytes()
 4157            .zip(text.bytes())
 4158            .take_while(|(a, b)| a == b)
 4159            .count();
 4160
 4161        let snapshot = self.buffer.read(cx).snapshot(cx);
 4162        let mut range_to_replace: Option<Range<isize>> = None;
 4163        let mut ranges = Vec::new();
 4164        let mut linked_edits = HashMap::<_, Vec<_>>::default();
 4165        for selection in &selections {
 4166            if snapshot.contains_str_at(selection.start.saturating_sub(lookbehind), &old_text) {
 4167                let start = selection.start.saturating_sub(lookbehind);
 4168                let end = selection.end + lookahead;
 4169                if selection.id == newest_selection.id {
 4170                    range_to_replace = Some(
 4171                        ((start + common_prefix_len) as isize - selection.start as isize)
 4172                            ..(end as isize - selection.start as isize),
 4173                    );
 4174                }
 4175                ranges.push(start + common_prefix_len..end);
 4176            } else {
 4177                common_prefix_len = 0;
 4178                ranges.clear();
 4179                ranges.extend(selections.iter().map(|s| {
 4180                    if s.id == newest_selection.id {
 4181                        range_to_replace = Some(
 4182                            old_range.start.to_offset_utf16(&snapshot).0 as isize
 4183                                - selection.start as isize
 4184                                ..old_range.end.to_offset_utf16(&snapshot).0 as isize
 4185                                    - selection.start as isize,
 4186                        );
 4187                        old_range.clone()
 4188                    } else {
 4189                        s.start..s.end
 4190                    }
 4191                }));
 4192                break;
 4193            }
 4194            if !self.linked_edit_ranges.is_empty() {
 4195                let start_anchor = snapshot.anchor_before(selection.head());
 4196                let end_anchor = snapshot.anchor_after(selection.tail());
 4197                if let Some(ranges) = self
 4198                    .linked_editing_ranges_for(start_anchor.text_anchor..end_anchor.text_anchor, cx)
 4199                {
 4200                    for (buffer, edits) in ranges {
 4201                        linked_edits.entry(buffer.clone()).or_default().extend(
 4202                            edits
 4203                                .into_iter()
 4204                                .map(|range| (range, text[common_prefix_len..].to_owned())),
 4205                        );
 4206                    }
 4207                }
 4208            }
 4209        }
 4210        let text = &text[common_prefix_len..];
 4211
 4212        cx.emit(EditorEvent::InputHandled {
 4213            utf16_range_to_replace: range_to_replace,
 4214            text: text.into(),
 4215        });
 4216
 4217        self.transact(cx, |this, cx| {
 4218            if let Some(mut snippet) = snippet {
 4219                snippet.text = text.to_string();
 4220                for tabstop in snippet.tabstops.iter_mut().flatten() {
 4221                    tabstop.start -= common_prefix_len as isize;
 4222                    tabstop.end -= common_prefix_len as isize;
 4223                }
 4224
 4225                this.insert_snippet(&ranges, snippet, cx).log_err();
 4226            } else {
 4227                this.buffer.update(cx, |buffer, cx| {
 4228                    buffer.edit(
 4229                        ranges.iter().map(|range| (range.clone(), text)),
 4230                        this.autoindent_mode.clone(),
 4231                        cx,
 4232                    );
 4233                });
 4234            }
 4235            for (buffer, edits) in linked_edits {
 4236                buffer.update(cx, |buffer, cx| {
 4237                    let snapshot = buffer.snapshot();
 4238                    let edits = edits
 4239                        .into_iter()
 4240                        .map(|(range, text)| {
 4241                            use text::ToPoint as TP;
 4242                            let end_point = TP::to_point(&range.end, &snapshot);
 4243                            let start_point = TP::to_point(&range.start, &snapshot);
 4244                            (start_point..end_point, text)
 4245                        })
 4246                        .sorted_by_key(|(range, _)| range.start)
 4247                        .collect::<Vec<_>>();
 4248                    buffer.edit(edits, None, cx);
 4249                })
 4250            }
 4251
 4252            this.refresh_inline_completion(true, cx);
 4253        });
 4254
 4255        if let Some(confirm) = completion.confirm.as_ref() {
 4256            (confirm)(cx);
 4257        }
 4258
 4259        if completion.show_new_completions_on_confirm {
 4260            self.show_completions(&ShowCompletions { trigger: None }, cx);
 4261        }
 4262
 4263        let provider = self.completion_provider.as_ref()?;
 4264        let apply_edits = provider.apply_additional_edits_for_completion(
 4265            buffer_handle,
 4266            completion.clone(),
 4267            true,
 4268            cx,
 4269        );
 4270        Some(cx.foreground_executor().spawn(async move {
 4271            apply_edits.await?;
 4272            Ok(())
 4273        }))
 4274    }
 4275
 4276    pub fn toggle_code_actions(&mut self, action: &ToggleCodeActions, cx: &mut ViewContext<Self>) {
 4277        let mut context_menu = self.context_menu.write();
 4278        if let Some(ContextMenu::CodeActions(code_actions)) = context_menu.as_ref() {
 4279            if code_actions.deployed_from_indicator == action.deployed_from_indicator {
 4280                // Toggle if we're selecting the same one
 4281                *context_menu = None;
 4282                cx.notify();
 4283                return;
 4284            } else {
 4285                // Otherwise, clear it and start a new one
 4286                *context_menu = None;
 4287                cx.notify();
 4288            }
 4289        }
 4290        drop(context_menu);
 4291        let snapshot = self.snapshot(cx);
 4292        let deployed_from_indicator = action.deployed_from_indicator;
 4293        let mut task = self.code_actions_task.take();
 4294        let action = action.clone();
 4295        cx.spawn(|editor, mut cx| async move {
 4296            while let Some(prev_task) = task {
 4297                prev_task.await;
 4298                task = editor.update(&mut cx, |this, _| this.code_actions_task.take())?;
 4299            }
 4300
 4301            let spawned_test_task = editor.update(&mut cx, |editor, cx| {
 4302                if editor.focus_handle.is_focused(cx) {
 4303                    let multibuffer_point = action
 4304                        .deployed_from_indicator
 4305                        .map(|row| DisplayPoint::new(row, 0).to_point(&snapshot))
 4306                        .unwrap_or_else(|| editor.selections.newest::<Point>(cx).head());
 4307                    let (buffer, buffer_row) = snapshot
 4308                        .buffer_snapshot
 4309                        .buffer_line_for_row(MultiBufferRow(multibuffer_point.row))
 4310                        .and_then(|(buffer_snapshot, range)| {
 4311                            editor
 4312                                .buffer
 4313                                .read(cx)
 4314                                .buffer(buffer_snapshot.remote_id())
 4315                                .map(|buffer| (buffer, range.start.row))
 4316                        })?;
 4317                    let (_, code_actions) = editor
 4318                        .available_code_actions
 4319                        .clone()
 4320                        .and_then(|(location, code_actions)| {
 4321                            let snapshot = location.buffer.read(cx).snapshot();
 4322                            let point_range = location.range.to_point(&snapshot);
 4323                            let point_range = point_range.start.row..=point_range.end.row;
 4324                            if point_range.contains(&buffer_row) {
 4325                                Some((location, code_actions))
 4326                            } else {
 4327                                None
 4328                            }
 4329                        })
 4330                        .unzip();
 4331                    let buffer_id = buffer.read(cx).remote_id();
 4332                    let tasks = editor
 4333                        .tasks
 4334                        .get(&(buffer_id, buffer_row))
 4335                        .map(|t| Arc::new(t.to_owned()));
 4336                    if tasks.is_none() && code_actions.is_none() {
 4337                        return None;
 4338                    }
 4339
 4340                    editor.completion_tasks.clear();
 4341                    editor.discard_inline_completion(false, cx);
 4342                    let task_context =
 4343                        tasks
 4344                            .as_ref()
 4345                            .zip(editor.project.clone())
 4346                            .map(|(tasks, project)| {
 4347                                let position = Point::new(buffer_row, tasks.column);
 4348                                let range_start = buffer.read(cx).anchor_at(position, Bias::Right);
 4349                                let location = Location {
 4350                                    buffer: buffer.clone(),
 4351                                    range: range_start..range_start,
 4352                                };
 4353                                // Fill in the environmental variables from the tree-sitter captures
 4354                                let mut captured_task_variables = TaskVariables::default();
 4355                                for (capture_name, value) in tasks.extra_variables.clone() {
 4356                                    captured_task_variables.insert(
 4357                                        task::VariableName::Custom(capture_name.into()),
 4358                                        value.clone(),
 4359                                    );
 4360                                }
 4361                                project.update(cx, |project, cx| {
 4362                                    project.task_context_for_location(
 4363                                        captured_task_variables,
 4364                                        location,
 4365                                        cx,
 4366                                    )
 4367                                })
 4368                            });
 4369
 4370                    Some(cx.spawn(|editor, mut cx| async move {
 4371                        let task_context = match task_context {
 4372                            Some(task_context) => task_context.await,
 4373                            None => None,
 4374                        };
 4375                        let resolved_tasks =
 4376                            tasks.zip(task_context).map(|(tasks, task_context)| {
 4377                                Arc::new(ResolvedTasks {
 4378                                    templates: tasks
 4379                                        .templates
 4380                                        .iter()
 4381                                        .filter_map(|(kind, template)| {
 4382                                            template
 4383                                                .resolve_task(&kind.to_id_base(), &task_context)
 4384                                                .map(|task| (kind.clone(), task))
 4385                                        })
 4386                                        .collect(),
 4387                                    position: snapshot.buffer_snapshot.anchor_before(Point::new(
 4388                                        multibuffer_point.row,
 4389                                        tasks.column,
 4390                                    )),
 4391                                })
 4392                            });
 4393                        let spawn_straight_away = resolved_tasks
 4394                            .as_ref()
 4395                            .map_or(false, |tasks| tasks.templates.len() == 1)
 4396                            && code_actions
 4397                                .as_ref()
 4398                                .map_or(true, |actions| actions.is_empty());
 4399                        if let Some(task) = editor
 4400                            .update(&mut cx, |editor, cx| {
 4401                                *editor.context_menu.write() =
 4402                                    Some(ContextMenu::CodeActions(CodeActionsMenu {
 4403                                        buffer,
 4404                                        actions: CodeActionContents {
 4405                                            tasks: resolved_tasks,
 4406                                            actions: code_actions,
 4407                                        },
 4408                                        selected_item: Default::default(),
 4409                                        scroll_handle: UniformListScrollHandle::default(),
 4410                                        deployed_from_indicator,
 4411                                    }));
 4412                                if spawn_straight_away {
 4413                                    if let Some(task) = editor.confirm_code_action(
 4414                                        &ConfirmCodeAction { item_ix: Some(0) },
 4415                                        cx,
 4416                                    ) {
 4417                                        cx.notify();
 4418                                        return task;
 4419                                    }
 4420                                }
 4421                                cx.notify();
 4422                                Task::ready(Ok(()))
 4423                            })
 4424                            .ok()
 4425                        {
 4426                            task.await
 4427                        } else {
 4428                            Ok(())
 4429                        }
 4430                    }))
 4431                } else {
 4432                    Some(Task::ready(Ok(())))
 4433                }
 4434            })?;
 4435            if let Some(task) = spawned_test_task {
 4436                task.await?;
 4437            }
 4438
 4439            Ok::<_, anyhow::Error>(())
 4440        })
 4441        .detach_and_log_err(cx);
 4442    }
 4443
 4444    pub fn confirm_code_action(
 4445        &mut self,
 4446        action: &ConfirmCodeAction,
 4447        cx: &mut ViewContext<Self>,
 4448    ) -> Option<Task<Result<()>>> {
 4449        let actions_menu = if let ContextMenu::CodeActions(menu) = self.hide_context_menu(cx)? {
 4450            menu
 4451        } else {
 4452            return None;
 4453        };
 4454        let action_ix = action.item_ix.unwrap_or(actions_menu.selected_item);
 4455        let action = actions_menu.actions.get(action_ix)?;
 4456        let title = action.label();
 4457        let buffer = actions_menu.buffer;
 4458        let workspace = self.workspace()?;
 4459
 4460        match action {
 4461            CodeActionsItem::Task(task_source_kind, resolved_task) => {
 4462                workspace.update(cx, |workspace, cx| {
 4463                    workspace::tasks::schedule_resolved_task(
 4464                        workspace,
 4465                        task_source_kind,
 4466                        resolved_task,
 4467                        false,
 4468                        cx,
 4469                    );
 4470
 4471                    Some(Task::ready(Ok(())))
 4472                })
 4473            }
 4474            CodeActionsItem::CodeAction(action) => {
 4475                let apply_code_actions = workspace
 4476                    .read(cx)
 4477                    .project()
 4478                    .clone()
 4479                    .update(cx, |project, cx| {
 4480                        project.apply_code_action(buffer, action, true, cx)
 4481                    });
 4482                let workspace = workspace.downgrade();
 4483                Some(cx.spawn(|editor, cx| async move {
 4484                    let project_transaction = apply_code_actions.await?;
 4485                    Self::open_project_transaction(
 4486                        &editor,
 4487                        workspace,
 4488                        project_transaction,
 4489                        title,
 4490                        cx,
 4491                    )
 4492                    .await
 4493                }))
 4494            }
 4495        }
 4496    }
 4497
 4498    pub async fn open_project_transaction(
 4499        this: &WeakView<Editor>,
 4500        workspace: WeakView<Workspace>,
 4501        transaction: ProjectTransaction,
 4502        title: String,
 4503        mut cx: AsyncWindowContext,
 4504    ) -> Result<()> {
 4505        let replica_id = this.update(&mut cx, |this, cx| this.replica_id(cx))?;
 4506
 4507        let mut entries = transaction.0.into_iter().collect::<Vec<_>>();
 4508        cx.update(|cx| {
 4509            entries.sort_unstable_by_key(|(buffer, _)| {
 4510                buffer.read(cx).file().map(|f| f.path().clone())
 4511            });
 4512        })?;
 4513
 4514        // If the project transaction's edits are all contained within this editor, then
 4515        // avoid opening a new editor to display them.
 4516
 4517        if let Some((buffer, transaction)) = entries.first() {
 4518            if entries.len() == 1 {
 4519                let excerpt = this.update(&mut cx, |editor, cx| {
 4520                    editor
 4521                        .buffer()
 4522                        .read(cx)
 4523                        .excerpt_containing(editor.selections.newest_anchor().head(), cx)
 4524                })?;
 4525                if let Some((_, excerpted_buffer, excerpt_range)) = excerpt {
 4526                    if excerpted_buffer == *buffer {
 4527                        let all_edits_within_excerpt = buffer.read_with(&cx, |buffer, _| {
 4528                            let excerpt_range = excerpt_range.to_offset(buffer);
 4529                            buffer
 4530                                .edited_ranges_for_transaction::<usize>(transaction)
 4531                                .all(|range| {
 4532                                    excerpt_range.start <= range.start
 4533                                        && excerpt_range.end >= range.end
 4534                                })
 4535                        })?;
 4536
 4537                        if all_edits_within_excerpt {
 4538                            return Ok(());
 4539                        }
 4540                    }
 4541                }
 4542            }
 4543        } else {
 4544            return Ok(());
 4545        }
 4546
 4547        let mut ranges_to_highlight = Vec::new();
 4548        let excerpt_buffer = cx.new_model(|cx| {
 4549            let mut multibuffer =
 4550                MultiBuffer::new(replica_id, Capability::ReadWrite).with_title(title);
 4551            for (buffer_handle, transaction) in &entries {
 4552                let buffer = buffer_handle.read(cx);
 4553                ranges_to_highlight.extend(
 4554                    multibuffer.push_excerpts_with_context_lines(
 4555                        buffer_handle.clone(),
 4556                        buffer
 4557                            .edited_ranges_for_transaction::<usize>(transaction)
 4558                            .collect(),
 4559                        DEFAULT_MULTIBUFFER_CONTEXT,
 4560                        cx,
 4561                    ),
 4562                );
 4563            }
 4564            multibuffer.push_transaction(entries.iter().map(|(b, t)| (b, t)), cx);
 4565            multibuffer
 4566        })?;
 4567
 4568        workspace.update(&mut cx, |workspace, cx| {
 4569            let project = workspace.project().clone();
 4570            let editor =
 4571                cx.new_view(|cx| Editor::for_multibuffer(excerpt_buffer, Some(project), true, cx));
 4572            workspace.add_item_to_active_pane(Box::new(editor.clone()), None, cx);
 4573            editor.update(cx, |editor, cx| {
 4574                editor.highlight_background::<Self>(
 4575                    &ranges_to_highlight,
 4576                    |theme| theme.editor_highlighted_line_background,
 4577                    cx,
 4578                );
 4579            });
 4580        })?;
 4581
 4582        Ok(())
 4583    }
 4584
 4585    fn refresh_code_actions(&mut self, cx: &mut ViewContext<Self>) -> Option<()> {
 4586        let project = self.project.clone()?;
 4587        let buffer = self.buffer.read(cx);
 4588        let newest_selection = self.selections.newest_anchor().clone();
 4589        let (start_buffer, start) = buffer.text_anchor_for_position(newest_selection.start, cx)?;
 4590        let (end_buffer, end) = buffer.text_anchor_for_position(newest_selection.end, cx)?;
 4591        if start_buffer != end_buffer {
 4592            return None;
 4593        }
 4594
 4595        self.code_actions_task = Some(cx.spawn(|this, mut cx| async move {
 4596            cx.background_executor()
 4597                .timer(CODE_ACTIONS_DEBOUNCE_TIMEOUT)
 4598                .await;
 4599
 4600            let actions = if let Ok(code_actions) = project.update(&mut cx, |project, cx| {
 4601                project.code_actions(&start_buffer, start..end, cx)
 4602            }) {
 4603                code_actions.await
 4604            } else {
 4605                Vec::new()
 4606            };
 4607
 4608            this.update(&mut cx, |this, cx| {
 4609                this.available_code_actions = if actions.is_empty() {
 4610                    None
 4611                } else {
 4612                    Some((
 4613                        Location {
 4614                            buffer: start_buffer,
 4615                            range: start..end,
 4616                        },
 4617                        actions.into(),
 4618                    ))
 4619                };
 4620                cx.notify();
 4621            })
 4622            .log_err();
 4623        }));
 4624        None
 4625    }
 4626
 4627    fn start_inline_blame_timer(&mut self, cx: &mut ViewContext<Self>) {
 4628        if let Some(delay) = ProjectSettings::get_global(cx).git.inline_blame_delay() {
 4629            self.show_git_blame_inline = false;
 4630
 4631            self.show_git_blame_inline_delay_task = Some(cx.spawn(|this, mut cx| async move {
 4632                cx.background_executor().timer(delay).await;
 4633
 4634                this.update(&mut cx, |this, cx| {
 4635                    this.show_git_blame_inline = true;
 4636                    cx.notify();
 4637                })
 4638                .log_err();
 4639            }));
 4640        }
 4641    }
 4642
 4643    fn refresh_document_highlights(&mut self, cx: &mut ViewContext<Self>) -> Option<()> {
 4644        if self.pending_rename.is_some() {
 4645            return None;
 4646        }
 4647
 4648        let project = self.project.clone()?;
 4649        let buffer = self.buffer.read(cx);
 4650        let newest_selection = self.selections.newest_anchor().clone();
 4651        let cursor_position = newest_selection.head();
 4652        let (cursor_buffer, cursor_buffer_position) =
 4653            buffer.text_anchor_for_position(cursor_position, cx)?;
 4654        let (tail_buffer, _) = buffer.text_anchor_for_position(newest_selection.tail(), cx)?;
 4655        if cursor_buffer != tail_buffer {
 4656            return None;
 4657        }
 4658
 4659        self.document_highlights_task = Some(cx.spawn(|this, mut cx| async move {
 4660            cx.background_executor()
 4661                .timer(DOCUMENT_HIGHLIGHTS_DEBOUNCE_TIMEOUT)
 4662                .await;
 4663
 4664            let highlights = if let Some(highlights) = project
 4665                .update(&mut cx, |project, cx| {
 4666                    project.document_highlights(&cursor_buffer, cursor_buffer_position, cx)
 4667                })
 4668                .log_err()
 4669            {
 4670                highlights.await.log_err()
 4671            } else {
 4672                None
 4673            };
 4674
 4675            if let Some(highlights) = highlights {
 4676                this.update(&mut cx, |this, cx| {
 4677                    if this.pending_rename.is_some() {
 4678                        return;
 4679                    }
 4680
 4681                    let buffer_id = cursor_position.buffer_id;
 4682                    let buffer = this.buffer.read(cx);
 4683                    if !buffer
 4684                        .text_anchor_for_position(cursor_position, cx)
 4685                        .map_or(false, |(buffer, _)| buffer == cursor_buffer)
 4686                    {
 4687                        return;
 4688                    }
 4689
 4690                    let cursor_buffer_snapshot = cursor_buffer.read(cx);
 4691                    let mut write_ranges = Vec::new();
 4692                    let mut read_ranges = Vec::new();
 4693                    for highlight in highlights {
 4694                        for (excerpt_id, excerpt_range) in
 4695                            buffer.excerpts_for_buffer(&cursor_buffer, cx)
 4696                        {
 4697                            let start = highlight
 4698                                .range
 4699                                .start
 4700                                .max(&excerpt_range.context.start, cursor_buffer_snapshot);
 4701                            let end = highlight
 4702                                .range
 4703                                .end
 4704                                .min(&excerpt_range.context.end, cursor_buffer_snapshot);
 4705                            if start.cmp(&end, cursor_buffer_snapshot).is_ge() {
 4706                                continue;
 4707                            }
 4708
 4709                            let range = Anchor {
 4710                                buffer_id,
 4711                                excerpt_id: excerpt_id,
 4712                                text_anchor: start,
 4713                            }..Anchor {
 4714                                buffer_id,
 4715                                excerpt_id,
 4716                                text_anchor: end,
 4717                            };
 4718                            if highlight.kind == lsp::DocumentHighlightKind::WRITE {
 4719                                write_ranges.push(range);
 4720                            } else {
 4721                                read_ranges.push(range);
 4722                            }
 4723                        }
 4724                    }
 4725
 4726                    this.highlight_background::<DocumentHighlightRead>(
 4727                        &read_ranges,
 4728                        |theme| theme.editor_document_highlight_read_background,
 4729                        cx,
 4730                    );
 4731                    this.highlight_background::<DocumentHighlightWrite>(
 4732                        &write_ranges,
 4733                        |theme| theme.editor_document_highlight_write_background,
 4734                        cx,
 4735                    );
 4736                    cx.notify();
 4737                })
 4738                .log_err();
 4739            }
 4740        }));
 4741        None
 4742    }
 4743
 4744    fn refresh_inline_completion(
 4745        &mut self,
 4746        debounce: bool,
 4747        cx: &mut ViewContext<Self>,
 4748    ) -> Option<()> {
 4749        let provider = self.inline_completion_provider()?;
 4750        let cursor = self.selections.newest_anchor().head();
 4751        let (buffer, cursor_buffer_position) =
 4752            self.buffer.read(cx).text_anchor_for_position(cursor, cx)?;
 4753        if !self.show_inline_completions
 4754            || !provider.is_enabled(&buffer, cursor_buffer_position, cx)
 4755        {
 4756            self.discard_inline_completion(false, cx);
 4757            return None;
 4758        }
 4759
 4760        self.update_visible_inline_completion(cx);
 4761        provider.refresh(buffer, cursor_buffer_position, debounce, cx);
 4762        Some(())
 4763    }
 4764
 4765    fn cycle_inline_completion(
 4766        &mut self,
 4767        direction: Direction,
 4768        cx: &mut ViewContext<Self>,
 4769    ) -> Option<()> {
 4770        let provider = self.inline_completion_provider()?;
 4771        let cursor = self.selections.newest_anchor().head();
 4772        let (buffer, cursor_buffer_position) =
 4773            self.buffer.read(cx).text_anchor_for_position(cursor, cx)?;
 4774        if !self.show_inline_completions
 4775            || !provider.is_enabled(&buffer, cursor_buffer_position, cx)
 4776        {
 4777            return None;
 4778        }
 4779
 4780        provider.cycle(buffer, cursor_buffer_position, direction, cx);
 4781        self.update_visible_inline_completion(cx);
 4782
 4783        Some(())
 4784    }
 4785
 4786    pub fn show_inline_completion(&mut self, _: &ShowInlineCompletion, cx: &mut ViewContext<Self>) {
 4787        if !self.has_active_inline_completion(cx) {
 4788            self.refresh_inline_completion(false, cx);
 4789            return;
 4790        }
 4791
 4792        self.update_visible_inline_completion(cx);
 4793    }
 4794
 4795    pub fn display_cursor_names(&mut self, _: &DisplayCursorNames, cx: &mut ViewContext<Self>) {
 4796        self.show_cursor_names(cx);
 4797    }
 4798
 4799    fn show_cursor_names(&mut self, cx: &mut ViewContext<Self>) {
 4800        self.show_cursor_names = true;
 4801        cx.notify();
 4802        cx.spawn(|this, mut cx| async move {
 4803            cx.background_executor().timer(CURSORS_VISIBLE_FOR).await;
 4804            this.update(&mut cx, |this, cx| {
 4805                this.show_cursor_names = false;
 4806                cx.notify()
 4807            })
 4808            .ok()
 4809        })
 4810        .detach();
 4811    }
 4812
 4813    pub fn next_inline_completion(&mut self, _: &NextInlineCompletion, cx: &mut ViewContext<Self>) {
 4814        if self.has_active_inline_completion(cx) {
 4815            self.cycle_inline_completion(Direction::Next, cx);
 4816        } else {
 4817            let is_copilot_disabled = self.refresh_inline_completion(false, cx).is_none();
 4818            if is_copilot_disabled {
 4819                cx.propagate();
 4820            }
 4821        }
 4822    }
 4823
 4824    pub fn previous_inline_completion(
 4825        &mut self,
 4826        _: &PreviousInlineCompletion,
 4827        cx: &mut ViewContext<Self>,
 4828    ) {
 4829        if self.has_active_inline_completion(cx) {
 4830            self.cycle_inline_completion(Direction::Prev, cx);
 4831        } else {
 4832            let is_copilot_disabled = self.refresh_inline_completion(false, cx).is_none();
 4833            if is_copilot_disabled {
 4834                cx.propagate();
 4835            }
 4836        }
 4837    }
 4838
 4839    pub fn accept_inline_completion(
 4840        &mut self,
 4841        _: &AcceptInlineCompletion,
 4842        cx: &mut ViewContext<Self>,
 4843    ) {
 4844        let Some(completion) = self.take_active_inline_completion(cx) else {
 4845            return;
 4846        };
 4847        if let Some(provider) = self.inline_completion_provider() {
 4848            provider.accept(cx);
 4849        }
 4850
 4851        cx.emit(EditorEvent::InputHandled {
 4852            utf16_range_to_replace: None,
 4853            text: completion.text.to_string().into(),
 4854        });
 4855        self.insert_with_autoindent_mode(&completion.text.to_string(), None, cx);
 4856        self.refresh_inline_completion(true, cx);
 4857        cx.notify();
 4858    }
 4859
 4860    pub fn accept_partial_inline_completion(
 4861        &mut self,
 4862        _: &AcceptPartialInlineCompletion,
 4863        cx: &mut ViewContext<Self>,
 4864    ) {
 4865        if self.selections.count() == 1 && self.has_active_inline_completion(cx) {
 4866            if let Some(completion) = self.take_active_inline_completion(cx) {
 4867                let mut partial_completion = completion
 4868                    .text
 4869                    .chars()
 4870                    .by_ref()
 4871                    .take_while(|c| c.is_alphabetic())
 4872                    .collect::<String>();
 4873                if partial_completion.is_empty() {
 4874                    partial_completion = completion
 4875                        .text
 4876                        .chars()
 4877                        .by_ref()
 4878                        .take_while(|c| c.is_whitespace() || !c.is_alphabetic())
 4879                        .collect::<String>();
 4880                }
 4881
 4882                cx.emit(EditorEvent::InputHandled {
 4883                    utf16_range_to_replace: None,
 4884                    text: partial_completion.clone().into(),
 4885                });
 4886                self.insert_with_autoindent_mode(&partial_completion, None, cx);
 4887                self.refresh_inline_completion(true, cx);
 4888                cx.notify();
 4889            }
 4890        }
 4891    }
 4892
 4893    fn discard_inline_completion(
 4894        &mut self,
 4895        should_report_inline_completion_event: bool,
 4896        cx: &mut ViewContext<Self>,
 4897    ) -> bool {
 4898        if let Some(provider) = self.inline_completion_provider() {
 4899            provider.discard(should_report_inline_completion_event, cx);
 4900        }
 4901
 4902        self.take_active_inline_completion(cx).is_some()
 4903    }
 4904
 4905    pub fn has_active_inline_completion(&self, cx: &AppContext) -> bool {
 4906        if let Some(completion) = self.active_inline_completion.as_ref() {
 4907            let buffer = self.buffer.read(cx).read(cx);
 4908            completion.position.is_valid(&buffer)
 4909        } else {
 4910            false
 4911        }
 4912    }
 4913
 4914    fn take_active_inline_completion(&mut self, cx: &mut ViewContext<Self>) -> Option<Inlay> {
 4915        let completion = self.active_inline_completion.take()?;
 4916        self.display_map.update(cx, |map, cx| {
 4917            map.splice_inlays(vec![completion.id], Default::default(), cx);
 4918        });
 4919        let buffer = self.buffer.read(cx).read(cx);
 4920
 4921        if completion.position.is_valid(&buffer) {
 4922            Some(completion)
 4923        } else {
 4924            None
 4925        }
 4926    }
 4927
 4928    fn update_visible_inline_completion(&mut self, cx: &mut ViewContext<Self>) {
 4929        let selection = self.selections.newest_anchor();
 4930        let cursor = selection.head();
 4931
 4932        if self.context_menu.read().is_none()
 4933            && self.completion_tasks.is_empty()
 4934            && selection.start == selection.end
 4935        {
 4936            if let Some(provider) = self.inline_completion_provider() {
 4937                if let Some((buffer, cursor_buffer_position)) =
 4938                    self.buffer.read(cx).text_anchor_for_position(cursor, cx)
 4939                {
 4940                    if let Some(text) =
 4941                        provider.active_completion_text(&buffer, cursor_buffer_position, cx)
 4942                    {
 4943                        let text = Rope::from(text);
 4944                        let mut to_remove = Vec::new();
 4945                        if let Some(completion) = self.active_inline_completion.take() {
 4946                            to_remove.push(completion.id);
 4947                        }
 4948
 4949                        let completion_inlay =
 4950                            Inlay::suggestion(post_inc(&mut self.next_inlay_id), cursor, text);
 4951                        self.active_inline_completion = Some(completion_inlay.clone());
 4952                        self.display_map.update(cx, move |map, cx| {
 4953                            map.splice_inlays(to_remove, vec![completion_inlay], cx)
 4954                        });
 4955                        cx.notify();
 4956                        return;
 4957                    }
 4958                }
 4959            }
 4960        }
 4961
 4962        self.discard_inline_completion(false, cx);
 4963    }
 4964
 4965    fn inline_completion_provider(&self) -> Option<Arc<dyn InlineCompletionProviderHandle>> {
 4966        Some(self.inline_completion_provider.as_ref()?.provider.clone())
 4967    }
 4968
 4969    fn render_code_actions_indicator(
 4970        &self,
 4971        _style: &EditorStyle,
 4972        row: DisplayRow,
 4973        is_active: bool,
 4974        cx: &mut ViewContext<Self>,
 4975    ) -> Option<IconButton> {
 4976        if self.available_code_actions.is_some() {
 4977            Some(
 4978                IconButton::new("code_actions_indicator", ui::IconName::Bolt)
 4979                    .shape(ui::IconButtonShape::Square)
 4980                    .icon_size(IconSize::XSmall)
 4981                    .icon_color(Color::Muted)
 4982                    .selected(is_active)
 4983                    .on_click(cx.listener(move |editor, _e, cx| {
 4984                        editor.focus(cx);
 4985                        editor.toggle_code_actions(
 4986                            &ToggleCodeActions {
 4987                                deployed_from_indicator: Some(row),
 4988                            },
 4989                            cx,
 4990                        );
 4991                    })),
 4992            )
 4993        } else {
 4994            None
 4995        }
 4996    }
 4997
 4998    fn clear_tasks(&mut self) {
 4999        self.tasks.clear()
 5000    }
 5001
 5002    fn insert_tasks(&mut self, key: (BufferId, BufferRow), value: RunnableTasks) {
 5003        if let Some(_) = self.tasks.insert(key, value) {
 5004            // This case should hopefully be rare, but just in case...
 5005            log::error!("multiple different run targets found on a single line, only the last target will be rendered")
 5006        }
 5007    }
 5008
 5009    fn render_run_indicator(
 5010        &self,
 5011        _style: &EditorStyle,
 5012        is_active: bool,
 5013        row: DisplayRow,
 5014        cx: &mut ViewContext<Self>,
 5015    ) -> IconButton {
 5016        IconButton::new(("run_indicator", row.0 as usize), ui::IconName::Play)
 5017            .shape(ui::IconButtonShape::Square)
 5018            .icon_size(IconSize::XSmall)
 5019            .icon_color(Color::Muted)
 5020            .selected(is_active)
 5021            .on_click(cx.listener(move |editor, _e, cx| {
 5022                editor.focus(cx);
 5023                editor.toggle_code_actions(
 5024                    &ToggleCodeActions {
 5025                        deployed_from_indicator: Some(row),
 5026                    },
 5027                    cx,
 5028                );
 5029            }))
 5030    }
 5031
 5032    pub fn context_menu_visible(&self) -> bool {
 5033        self.context_menu
 5034            .read()
 5035            .as_ref()
 5036            .map_or(false, |menu| menu.visible())
 5037    }
 5038
 5039    fn render_context_menu(
 5040        &self,
 5041        cursor_position: DisplayPoint,
 5042        style: &EditorStyle,
 5043        max_height: Pixels,
 5044        cx: &mut ViewContext<Editor>,
 5045    ) -> Option<(ContextMenuOrigin, AnyElement)> {
 5046        self.context_menu.read().as_ref().map(|menu| {
 5047            menu.render(
 5048                cursor_position,
 5049                style,
 5050                max_height,
 5051                self.workspace.as_ref().map(|(w, _)| w.clone()),
 5052                cx,
 5053            )
 5054        })
 5055    }
 5056
 5057    fn hide_context_menu(&mut self, cx: &mut ViewContext<Self>) -> Option<ContextMenu> {
 5058        cx.notify();
 5059        self.completion_tasks.clear();
 5060        let context_menu = self.context_menu.write().take();
 5061        if context_menu.is_some() {
 5062            self.update_visible_inline_completion(cx);
 5063        }
 5064        context_menu
 5065    }
 5066
 5067    pub fn insert_snippet(
 5068        &mut self,
 5069        insertion_ranges: &[Range<usize>],
 5070        snippet: Snippet,
 5071        cx: &mut ViewContext<Self>,
 5072    ) -> Result<()> {
 5073        struct Tabstop<T> {
 5074            is_end_tabstop: bool,
 5075            ranges: Vec<Range<T>>,
 5076        }
 5077
 5078        let tabstops = self.buffer.update(cx, |buffer, cx| {
 5079            let snippet_text: Arc<str> = snippet.text.clone().into();
 5080            buffer.edit(
 5081                insertion_ranges
 5082                    .iter()
 5083                    .cloned()
 5084                    .map(|range| (range, snippet_text.clone())),
 5085                Some(AutoindentMode::EachLine),
 5086                cx,
 5087            );
 5088
 5089            let snapshot = &*buffer.read(cx);
 5090            let snippet = &snippet;
 5091            snippet
 5092                .tabstops
 5093                .iter()
 5094                .map(|tabstop| {
 5095                    let is_end_tabstop = tabstop.first().map_or(false, |tabstop| {
 5096                        tabstop.is_empty() && tabstop.start == snippet.text.len() as isize
 5097                    });
 5098                    let mut tabstop_ranges = tabstop
 5099                        .iter()
 5100                        .flat_map(|tabstop_range| {
 5101                            let mut delta = 0_isize;
 5102                            insertion_ranges.iter().map(move |insertion_range| {
 5103                                let insertion_start = insertion_range.start as isize + delta;
 5104                                delta +=
 5105                                    snippet.text.len() as isize - insertion_range.len() as isize;
 5106
 5107                                let start = ((insertion_start + tabstop_range.start) as usize)
 5108                                    .min(snapshot.len());
 5109                                let end = ((insertion_start + tabstop_range.end) as usize)
 5110                                    .min(snapshot.len());
 5111                                snapshot.anchor_before(start)..snapshot.anchor_after(end)
 5112                            })
 5113                        })
 5114                        .collect::<Vec<_>>();
 5115                    tabstop_ranges.sort_unstable_by(|a, b| a.start.cmp(&b.start, snapshot));
 5116
 5117                    Tabstop {
 5118                        is_end_tabstop,
 5119                        ranges: tabstop_ranges,
 5120                    }
 5121                })
 5122                .collect::<Vec<_>>()
 5123        });
 5124
 5125        if let Some(tabstop) = tabstops.first() {
 5126            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 5127                s.select_ranges(tabstop.ranges.iter().cloned());
 5128            });
 5129
 5130            // If we're already at the last tabstop and it's at the end of the snippet,
 5131            // we're done, we don't need to keep the state around.
 5132            if !tabstop.is_end_tabstop {
 5133                let ranges = tabstops
 5134                    .into_iter()
 5135                    .map(|tabstop| tabstop.ranges)
 5136                    .collect::<Vec<_>>();
 5137                self.snippet_stack.push(SnippetState {
 5138                    active_index: 0,
 5139                    ranges,
 5140                });
 5141            }
 5142
 5143            // Check whether the just-entered snippet ends with an auto-closable bracket.
 5144            if self.autoclose_regions.is_empty() {
 5145                let snapshot = self.buffer.read(cx).snapshot(cx);
 5146                for selection in &mut self.selections.all::<Point>(cx) {
 5147                    let selection_head = selection.head();
 5148                    let Some(scope) = snapshot.language_scope_at(selection_head) else {
 5149                        continue;
 5150                    };
 5151
 5152                    let mut bracket_pair = None;
 5153                    let next_chars = snapshot.chars_at(selection_head).collect::<String>();
 5154                    let prev_chars = snapshot
 5155                        .reversed_chars_at(selection_head)
 5156                        .collect::<String>();
 5157                    for (pair, enabled) in scope.brackets() {
 5158                        if enabled
 5159                            && pair.close
 5160                            && prev_chars.starts_with(pair.start.as_str())
 5161                            && next_chars.starts_with(pair.end.as_str())
 5162                        {
 5163                            bracket_pair = Some(pair.clone());
 5164                            break;
 5165                        }
 5166                    }
 5167                    if let Some(pair) = bracket_pair {
 5168                        let start = snapshot.anchor_after(selection_head);
 5169                        let end = snapshot.anchor_after(selection_head);
 5170                        self.autoclose_regions.push(AutocloseRegion {
 5171                            selection_id: selection.id,
 5172                            range: start..end,
 5173                            pair,
 5174                        });
 5175                    }
 5176                }
 5177            }
 5178        }
 5179        Ok(())
 5180    }
 5181
 5182    pub fn move_to_next_snippet_tabstop(&mut self, cx: &mut ViewContext<Self>) -> bool {
 5183        self.move_to_snippet_tabstop(Bias::Right, cx)
 5184    }
 5185
 5186    pub fn move_to_prev_snippet_tabstop(&mut self, cx: &mut ViewContext<Self>) -> bool {
 5187        self.move_to_snippet_tabstop(Bias::Left, cx)
 5188    }
 5189
 5190    pub fn move_to_snippet_tabstop(&mut self, bias: Bias, cx: &mut ViewContext<Self>) -> bool {
 5191        if let Some(mut snippet) = self.snippet_stack.pop() {
 5192            match bias {
 5193                Bias::Left => {
 5194                    if snippet.active_index > 0 {
 5195                        snippet.active_index -= 1;
 5196                    } else {
 5197                        self.snippet_stack.push(snippet);
 5198                        return false;
 5199                    }
 5200                }
 5201                Bias::Right => {
 5202                    if snippet.active_index + 1 < snippet.ranges.len() {
 5203                        snippet.active_index += 1;
 5204                    } else {
 5205                        self.snippet_stack.push(snippet);
 5206                        return false;
 5207                    }
 5208                }
 5209            }
 5210            if let Some(current_ranges) = snippet.ranges.get(snippet.active_index) {
 5211                self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 5212                    s.select_anchor_ranges(current_ranges.iter().cloned())
 5213                });
 5214                // If snippet state is not at the last tabstop, push it back on the stack
 5215                if snippet.active_index + 1 < snippet.ranges.len() {
 5216                    self.snippet_stack.push(snippet);
 5217                }
 5218                return true;
 5219            }
 5220        }
 5221
 5222        false
 5223    }
 5224
 5225    pub fn clear(&mut self, cx: &mut ViewContext<Self>) {
 5226        self.transact(cx, |this, cx| {
 5227            this.select_all(&SelectAll, cx);
 5228            this.insert("", cx);
 5229        });
 5230    }
 5231
 5232    pub fn backspace(&mut self, _: &Backspace, cx: &mut ViewContext<Self>) {
 5233        self.transact(cx, |this, cx| {
 5234            this.select_autoclose_pair(cx);
 5235            let mut linked_ranges = HashMap::<_, Vec<_>>::default();
 5236            if !this.linked_edit_ranges.is_empty() {
 5237                let selections = this.selections.all::<MultiBufferPoint>(cx);
 5238                let snapshot = this.buffer.read(cx).snapshot(cx);
 5239
 5240                for selection in selections.iter() {
 5241                    let selection_start = snapshot.anchor_before(selection.start).text_anchor;
 5242                    let selection_end = snapshot.anchor_after(selection.end).text_anchor;
 5243                    if selection_start.buffer_id != selection_end.buffer_id {
 5244                        continue;
 5245                    }
 5246                    if let Some(ranges) =
 5247                        this.linked_editing_ranges_for(selection_start..selection_end, cx)
 5248                    {
 5249                        for (buffer, entries) in ranges {
 5250                            linked_ranges.entry(buffer).or_default().extend(entries);
 5251                        }
 5252                    }
 5253                }
 5254            }
 5255
 5256            let mut selections = this.selections.all::<MultiBufferPoint>(cx);
 5257            if !this.selections.line_mode {
 5258                let display_map = this.display_map.update(cx, |map, cx| map.snapshot(cx));
 5259                for selection in &mut selections {
 5260                    if selection.is_empty() {
 5261                        let old_head = selection.head();
 5262                        let mut new_head =
 5263                            movement::left(&display_map, old_head.to_display_point(&display_map))
 5264                                .to_point(&display_map);
 5265                        if let Some((buffer, line_buffer_range)) = display_map
 5266                            .buffer_snapshot
 5267                            .buffer_line_for_row(MultiBufferRow(old_head.row))
 5268                        {
 5269                            let indent_size =
 5270                                buffer.indent_size_for_line(line_buffer_range.start.row);
 5271                            let indent_len = match indent_size.kind {
 5272                                IndentKind::Space => {
 5273                                    buffer.settings_at(line_buffer_range.start, cx).tab_size
 5274                                }
 5275                                IndentKind::Tab => NonZeroU32::new(1).unwrap(),
 5276                            };
 5277                            if old_head.column <= indent_size.len && old_head.column > 0 {
 5278                                let indent_len = indent_len.get();
 5279                                new_head = cmp::min(
 5280                                    new_head,
 5281                                    MultiBufferPoint::new(
 5282                                        old_head.row,
 5283                                        ((old_head.column - 1) / indent_len) * indent_len,
 5284                                    ),
 5285                                );
 5286                            }
 5287                        }
 5288
 5289                        selection.set_head(new_head, SelectionGoal::None);
 5290                    }
 5291                }
 5292            }
 5293
 5294            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 5295            this.insert("", cx);
 5296            let empty_str: Arc<str> = Arc::from("");
 5297            for (buffer, edits) in linked_ranges {
 5298                let snapshot = buffer.read(cx).snapshot();
 5299                use text::ToPoint as TP;
 5300
 5301                let edits = edits
 5302                    .into_iter()
 5303                    .map(|range| {
 5304                        let end_point = TP::to_point(&range.end, &snapshot);
 5305                        let mut start_point = TP::to_point(&range.start, &snapshot);
 5306
 5307                        if end_point == start_point {
 5308                            let offset = text::ToOffset::to_offset(&range.start, &snapshot)
 5309                                .saturating_sub(1);
 5310                            start_point = TP::to_point(&offset, &snapshot);
 5311                        };
 5312
 5313                        (start_point..end_point, empty_str.clone())
 5314                    })
 5315                    .sorted_by_key(|(range, _)| range.start)
 5316                    .collect::<Vec<_>>();
 5317                buffer.update(cx, |this, cx| {
 5318                    this.edit(edits, None, cx);
 5319                })
 5320            }
 5321            this.refresh_inline_completion(true, cx);
 5322            linked_editing_ranges::refresh_linked_ranges(this, cx);
 5323        });
 5324    }
 5325
 5326    pub fn delete(&mut self, _: &Delete, cx: &mut ViewContext<Self>) {
 5327        self.transact(cx, |this, cx| {
 5328            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 5329                let line_mode = s.line_mode;
 5330                s.move_with(|map, selection| {
 5331                    if selection.is_empty() && !line_mode {
 5332                        let cursor = movement::right(map, selection.head());
 5333                        selection.end = cursor;
 5334                        selection.reversed = true;
 5335                        selection.goal = SelectionGoal::None;
 5336                    }
 5337                })
 5338            });
 5339            this.insert("", cx);
 5340            this.refresh_inline_completion(true, cx);
 5341        });
 5342    }
 5343
 5344    pub fn tab_prev(&mut self, _: &TabPrev, cx: &mut ViewContext<Self>) {
 5345        if self.move_to_prev_snippet_tabstop(cx) {
 5346            return;
 5347        }
 5348
 5349        self.outdent(&Outdent, cx);
 5350    }
 5351
 5352    pub fn tab(&mut self, _: &Tab, cx: &mut ViewContext<Self>) {
 5353        if self.move_to_next_snippet_tabstop(cx) || self.read_only(cx) {
 5354            return;
 5355        }
 5356
 5357        let mut selections = self.selections.all_adjusted(cx);
 5358        let buffer = self.buffer.read(cx);
 5359        let snapshot = buffer.snapshot(cx);
 5360        let rows_iter = selections.iter().map(|s| s.head().row);
 5361        let suggested_indents = snapshot.suggested_indents(rows_iter, cx);
 5362
 5363        let mut edits = Vec::new();
 5364        let mut prev_edited_row = 0;
 5365        let mut row_delta = 0;
 5366        for selection in &mut selections {
 5367            if selection.start.row != prev_edited_row {
 5368                row_delta = 0;
 5369            }
 5370            prev_edited_row = selection.end.row;
 5371
 5372            // If the selection is non-empty, then increase the indentation of the selected lines.
 5373            if !selection.is_empty() {
 5374                row_delta =
 5375                    Self::indent_selection(buffer, &snapshot, selection, &mut edits, row_delta, cx);
 5376                continue;
 5377            }
 5378
 5379            // If the selection is empty and the cursor is in the leading whitespace before the
 5380            // suggested indentation, then auto-indent the line.
 5381            let cursor = selection.head();
 5382            let current_indent = snapshot.indent_size_for_line(MultiBufferRow(cursor.row));
 5383            if let Some(suggested_indent) =
 5384                suggested_indents.get(&MultiBufferRow(cursor.row)).copied()
 5385            {
 5386                if cursor.column < suggested_indent.len
 5387                    && cursor.column <= current_indent.len
 5388                    && current_indent.len <= suggested_indent.len
 5389                {
 5390                    selection.start = Point::new(cursor.row, suggested_indent.len);
 5391                    selection.end = selection.start;
 5392                    if row_delta == 0 {
 5393                        edits.extend(Buffer::edit_for_indent_size_adjustment(
 5394                            cursor.row,
 5395                            current_indent,
 5396                            suggested_indent,
 5397                        ));
 5398                        row_delta = suggested_indent.len - current_indent.len;
 5399                    }
 5400                    continue;
 5401                }
 5402            }
 5403
 5404            // Otherwise, insert a hard or soft tab.
 5405            let settings = buffer.settings_at(cursor, cx);
 5406            let tab_size = if settings.hard_tabs {
 5407                IndentSize::tab()
 5408            } else {
 5409                let tab_size = settings.tab_size.get();
 5410                let char_column = snapshot
 5411                    .text_for_range(Point::new(cursor.row, 0)..cursor)
 5412                    .flat_map(str::chars)
 5413                    .count()
 5414                    + row_delta as usize;
 5415                let chars_to_next_tab_stop = tab_size - (char_column as u32 % tab_size);
 5416                IndentSize::spaces(chars_to_next_tab_stop)
 5417            };
 5418            selection.start = Point::new(cursor.row, cursor.column + row_delta + tab_size.len);
 5419            selection.end = selection.start;
 5420            edits.push((cursor..cursor, tab_size.chars().collect::<String>()));
 5421            row_delta += tab_size.len;
 5422        }
 5423
 5424        self.transact(cx, |this, cx| {
 5425            this.buffer.update(cx, |b, cx| b.edit(edits, None, cx));
 5426            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 5427            this.refresh_inline_completion(true, cx);
 5428        });
 5429    }
 5430
 5431    pub fn indent(&mut self, _: &Indent, cx: &mut ViewContext<Self>) {
 5432        if self.read_only(cx) {
 5433            return;
 5434        }
 5435        let mut selections = self.selections.all::<Point>(cx);
 5436        let mut prev_edited_row = 0;
 5437        let mut row_delta = 0;
 5438        let mut edits = Vec::new();
 5439        let buffer = self.buffer.read(cx);
 5440        let snapshot = buffer.snapshot(cx);
 5441        for selection in &mut selections {
 5442            if selection.start.row != prev_edited_row {
 5443                row_delta = 0;
 5444            }
 5445            prev_edited_row = selection.end.row;
 5446
 5447            row_delta =
 5448                Self::indent_selection(buffer, &snapshot, selection, &mut edits, row_delta, cx);
 5449        }
 5450
 5451        self.transact(cx, |this, cx| {
 5452            this.buffer.update(cx, |b, cx| b.edit(edits, None, cx));
 5453            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 5454        });
 5455    }
 5456
 5457    fn indent_selection(
 5458        buffer: &MultiBuffer,
 5459        snapshot: &MultiBufferSnapshot,
 5460        selection: &mut Selection<Point>,
 5461        edits: &mut Vec<(Range<Point>, String)>,
 5462        delta_for_start_row: u32,
 5463        cx: &AppContext,
 5464    ) -> u32 {
 5465        let settings = buffer.settings_at(selection.start, cx);
 5466        let tab_size = settings.tab_size.get();
 5467        let indent_kind = if settings.hard_tabs {
 5468            IndentKind::Tab
 5469        } else {
 5470            IndentKind::Space
 5471        };
 5472        let mut start_row = selection.start.row;
 5473        let mut end_row = selection.end.row + 1;
 5474
 5475        // If a selection ends at the beginning of a line, don't indent
 5476        // that last line.
 5477        if selection.end.column == 0 && selection.end.row > selection.start.row {
 5478            end_row -= 1;
 5479        }
 5480
 5481        // Avoid re-indenting a row that has already been indented by a
 5482        // previous selection, but still update this selection's column
 5483        // to reflect that indentation.
 5484        if delta_for_start_row > 0 {
 5485            start_row += 1;
 5486            selection.start.column += delta_for_start_row;
 5487            if selection.end.row == selection.start.row {
 5488                selection.end.column += delta_for_start_row;
 5489            }
 5490        }
 5491
 5492        let mut delta_for_end_row = 0;
 5493        let has_multiple_rows = start_row + 1 != end_row;
 5494        for row in start_row..end_row {
 5495            let current_indent = snapshot.indent_size_for_line(MultiBufferRow(row));
 5496            let indent_delta = match (current_indent.kind, indent_kind) {
 5497                (IndentKind::Space, IndentKind::Space) => {
 5498                    let columns_to_next_tab_stop = tab_size - (current_indent.len % tab_size);
 5499                    IndentSize::spaces(columns_to_next_tab_stop)
 5500                }
 5501                (IndentKind::Tab, IndentKind::Space) => IndentSize::spaces(tab_size),
 5502                (_, IndentKind::Tab) => IndentSize::tab(),
 5503            };
 5504
 5505            let start = if has_multiple_rows || current_indent.len < selection.start.column {
 5506                0
 5507            } else {
 5508                selection.start.column
 5509            };
 5510            let row_start = Point::new(row, start);
 5511            edits.push((
 5512                row_start..row_start,
 5513                indent_delta.chars().collect::<String>(),
 5514            ));
 5515
 5516            // Update this selection's endpoints to reflect the indentation.
 5517            if row == selection.start.row {
 5518                selection.start.column += indent_delta.len;
 5519            }
 5520            if row == selection.end.row {
 5521                selection.end.column += indent_delta.len;
 5522                delta_for_end_row = indent_delta.len;
 5523            }
 5524        }
 5525
 5526        if selection.start.row == selection.end.row {
 5527            delta_for_start_row + delta_for_end_row
 5528        } else {
 5529            delta_for_end_row
 5530        }
 5531    }
 5532
 5533    pub fn outdent(&mut self, _: &Outdent, cx: &mut ViewContext<Self>) {
 5534        if self.read_only(cx) {
 5535            return;
 5536        }
 5537        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 5538        let selections = self.selections.all::<Point>(cx);
 5539        let mut deletion_ranges = Vec::new();
 5540        let mut last_outdent = None;
 5541        {
 5542            let buffer = self.buffer.read(cx);
 5543            let snapshot = buffer.snapshot(cx);
 5544            for selection in &selections {
 5545                let settings = buffer.settings_at(selection.start, cx);
 5546                let tab_size = settings.tab_size.get();
 5547                let mut rows = selection.spanned_rows(false, &display_map);
 5548
 5549                // Avoid re-outdenting a row that has already been outdented by a
 5550                // previous selection.
 5551                if let Some(last_row) = last_outdent {
 5552                    if last_row == rows.start {
 5553                        rows.start = rows.start.next_row();
 5554                    }
 5555                }
 5556                let has_multiple_rows = rows.len() > 1;
 5557                for row in rows.iter_rows() {
 5558                    let indent_size = snapshot.indent_size_for_line(row);
 5559                    if indent_size.len > 0 {
 5560                        let deletion_len = match indent_size.kind {
 5561                            IndentKind::Space => {
 5562                                let columns_to_prev_tab_stop = indent_size.len % tab_size;
 5563                                if columns_to_prev_tab_stop == 0 {
 5564                                    tab_size
 5565                                } else {
 5566                                    columns_to_prev_tab_stop
 5567                                }
 5568                            }
 5569                            IndentKind::Tab => 1,
 5570                        };
 5571                        let start = if has_multiple_rows
 5572                            || deletion_len > selection.start.column
 5573                            || indent_size.len < selection.start.column
 5574                        {
 5575                            0
 5576                        } else {
 5577                            selection.start.column - deletion_len
 5578                        };
 5579                        deletion_ranges.push(
 5580                            Point::new(row.0, start)..Point::new(row.0, start + deletion_len),
 5581                        );
 5582                        last_outdent = Some(row);
 5583                    }
 5584                }
 5585            }
 5586        }
 5587
 5588        self.transact(cx, |this, cx| {
 5589            this.buffer.update(cx, |buffer, cx| {
 5590                let empty_str: Arc<str> = "".into();
 5591                buffer.edit(
 5592                    deletion_ranges
 5593                        .into_iter()
 5594                        .map(|range| (range, empty_str.clone())),
 5595                    None,
 5596                    cx,
 5597                );
 5598            });
 5599            let selections = this.selections.all::<usize>(cx);
 5600            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 5601        });
 5602    }
 5603
 5604    pub fn delete_line(&mut self, _: &DeleteLine, cx: &mut ViewContext<Self>) {
 5605        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 5606        let selections = self.selections.all::<Point>(cx);
 5607
 5608        let mut new_cursors = Vec::new();
 5609        let mut edit_ranges = Vec::new();
 5610        let mut selections = selections.iter().peekable();
 5611        while let Some(selection) = selections.next() {
 5612            let mut rows = selection.spanned_rows(false, &display_map);
 5613            let goal_display_column = selection.head().to_display_point(&display_map).column();
 5614
 5615            // Accumulate contiguous regions of rows that we want to delete.
 5616            while let Some(next_selection) = selections.peek() {
 5617                let next_rows = next_selection.spanned_rows(false, &display_map);
 5618                if next_rows.start <= rows.end {
 5619                    rows.end = next_rows.end;
 5620                    selections.next().unwrap();
 5621                } else {
 5622                    break;
 5623                }
 5624            }
 5625
 5626            let buffer = &display_map.buffer_snapshot;
 5627            let mut edit_start = Point::new(rows.start.0, 0).to_offset(buffer);
 5628            let edit_end;
 5629            let cursor_buffer_row;
 5630            if buffer.max_point().row >= rows.end.0 {
 5631                // If there's a line after the range, delete the \n from the end of the row range
 5632                // and position the cursor on the next line.
 5633                edit_end = Point::new(rows.end.0, 0).to_offset(buffer);
 5634                cursor_buffer_row = rows.end;
 5635            } else {
 5636                // If there isn't a line after the range, delete the \n from the line before the
 5637                // start of the row range and position the cursor there.
 5638                edit_start = edit_start.saturating_sub(1);
 5639                edit_end = buffer.len();
 5640                cursor_buffer_row = rows.start.previous_row();
 5641            }
 5642
 5643            let mut cursor = Point::new(cursor_buffer_row.0, 0).to_display_point(&display_map);
 5644            *cursor.column_mut() =
 5645                cmp::min(goal_display_column, display_map.line_len(cursor.row()));
 5646
 5647            new_cursors.push((
 5648                selection.id,
 5649                buffer.anchor_after(cursor.to_point(&display_map)),
 5650            ));
 5651            edit_ranges.push(edit_start..edit_end);
 5652        }
 5653
 5654        self.transact(cx, |this, cx| {
 5655            let buffer = this.buffer.update(cx, |buffer, cx| {
 5656                let empty_str: Arc<str> = "".into();
 5657                buffer.edit(
 5658                    edit_ranges
 5659                        .into_iter()
 5660                        .map(|range| (range, empty_str.clone())),
 5661                    None,
 5662                    cx,
 5663                );
 5664                buffer.snapshot(cx)
 5665            });
 5666            let new_selections = new_cursors
 5667                .into_iter()
 5668                .map(|(id, cursor)| {
 5669                    let cursor = cursor.to_point(&buffer);
 5670                    Selection {
 5671                        id,
 5672                        start: cursor,
 5673                        end: cursor,
 5674                        reversed: false,
 5675                        goal: SelectionGoal::None,
 5676                    }
 5677                })
 5678                .collect();
 5679
 5680            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 5681                s.select(new_selections);
 5682            });
 5683        });
 5684    }
 5685
 5686    pub fn join_lines(&mut self, _: &JoinLines, cx: &mut ViewContext<Self>) {
 5687        if self.read_only(cx) {
 5688            return;
 5689        }
 5690        let mut row_ranges = Vec::<Range<MultiBufferRow>>::new();
 5691        for selection in self.selections.all::<Point>(cx) {
 5692            let start = MultiBufferRow(selection.start.row);
 5693            let end = if selection.start.row == selection.end.row {
 5694                MultiBufferRow(selection.start.row + 1)
 5695            } else {
 5696                MultiBufferRow(selection.end.row)
 5697            };
 5698
 5699            if let Some(last_row_range) = row_ranges.last_mut() {
 5700                if start <= last_row_range.end {
 5701                    last_row_range.end = end;
 5702                    continue;
 5703                }
 5704            }
 5705            row_ranges.push(start..end);
 5706        }
 5707
 5708        let snapshot = self.buffer.read(cx).snapshot(cx);
 5709        let mut cursor_positions = Vec::new();
 5710        for row_range in &row_ranges {
 5711            let anchor = snapshot.anchor_before(Point::new(
 5712                row_range.end.previous_row().0,
 5713                snapshot.line_len(row_range.end.previous_row()),
 5714            ));
 5715            cursor_positions.push(anchor..anchor);
 5716        }
 5717
 5718        self.transact(cx, |this, cx| {
 5719            for row_range in row_ranges.into_iter().rev() {
 5720                for row in row_range.iter_rows().rev() {
 5721                    let end_of_line = Point::new(row.0, snapshot.line_len(row));
 5722                    let next_line_row = row.next_row();
 5723                    let indent = snapshot.indent_size_for_line(next_line_row);
 5724                    let start_of_next_line = Point::new(next_line_row.0, indent.len);
 5725
 5726                    let replace = if snapshot.line_len(next_line_row) > indent.len {
 5727                        " "
 5728                    } else {
 5729                        ""
 5730                    };
 5731
 5732                    this.buffer.update(cx, |buffer, cx| {
 5733                        buffer.edit([(end_of_line..start_of_next_line, replace)], None, cx)
 5734                    });
 5735                }
 5736            }
 5737
 5738            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 5739                s.select_anchor_ranges(cursor_positions)
 5740            });
 5741        });
 5742    }
 5743
 5744    pub fn sort_lines_case_sensitive(
 5745        &mut self,
 5746        _: &SortLinesCaseSensitive,
 5747        cx: &mut ViewContext<Self>,
 5748    ) {
 5749        self.manipulate_lines(cx, |lines| lines.sort())
 5750    }
 5751
 5752    pub fn sort_lines_case_insensitive(
 5753        &mut self,
 5754        _: &SortLinesCaseInsensitive,
 5755        cx: &mut ViewContext<Self>,
 5756    ) {
 5757        self.manipulate_lines(cx, |lines| lines.sort_by_key(|line| line.to_lowercase()))
 5758    }
 5759
 5760    pub fn unique_lines_case_insensitive(
 5761        &mut self,
 5762        _: &UniqueLinesCaseInsensitive,
 5763        cx: &mut ViewContext<Self>,
 5764    ) {
 5765        self.manipulate_lines(cx, |lines| {
 5766            let mut seen = HashSet::default();
 5767            lines.retain(|line| seen.insert(line.to_lowercase()));
 5768        })
 5769    }
 5770
 5771    pub fn unique_lines_case_sensitive(
 5772        &mut self,
 5773        _: &UniqueLinesCaseSensitive,
 5774        cx: &mut ViewContext<Self>,
 5775    ) {
 5776        self.manipulate_lines(cx, |lines| {
 5777            let mut seen = HashSet::default();
 5778            lines.retain(|line| seen.insert(*line));
 5779        })
 5780    }
 5781
 5782    pub fn revert_selected_hunks(&mut self, _: &RevertSelectedHunks, cx: &mut ViewContext<Self>) {
 5783        let revert_changes = self.gather_revert_changes(&self.selections.disjoint_anchors(), cx);
 5784        if !revert_changes.is_empty() {
 5785            self.transact(cx, |editor, cx| {
 5786                editor.buffer().update(cx, |multi_buffer, cx| {
 5787                    for (buffer_id, changes) in revert_changes {
 5788                        if let Some(buffer) = multi_buffer.buffer(buffer_id) {
 5789                            buffer.update(cx, |buffer, cx| {
 5790                                buffer.edit(
 5791                                    changes.into_iter().map(|(range, text)| {
 5792                                        (range, text.to_string().map(Arc::<str>::from))
 5793                                    }),
 5794                                    None,
 5795                                    cx,
 5796                                );
 5797                            });
 5798                        }
 5799                    }
 5800                });
 5801                editor.change_selections(None, cx, |selections| selections.refresh());
 5802            });
 5803        }
 5804    }
 5805
 5806    pub fn open_active_item_in_terminal(&mut self, _: &OpenInTerminal, cx: &mut ViewContext<Self>) {
 5807        if let Some(working_directory) = self.active_excerpt(cx).and_then(|(_, buffer, _)| {
 5808            let project_path = buffer.read(cx).project_path(cx)?;
 5809            let project = self.project.as_ref()?.read(cx);
 5810            let entry = project.entry_for_path(&project_path, cx)?;
 5811            let abs_path = project.absolute_path(&project_path, cx)?;
 5812            let parent = if entry.is_symlink {
 5813                abs_path.canonicalize().ok()?
 5814            } else {
 5815                abs_path
 5816            }
 5817            .parent()?
 5818            .to_path_buf();
 5819            Some(parent)
 5820        }) {
 5821            cx.dispatch_action(OpenTerminal { working_directory }.boxed_clone());
 5822        }
 5823    }
 5824
 5825    fn gather_revert_changes(
 5826        &mut self,
 5827        selections: &[Selection<Anchor>],
 5828        cx: &mut ViewContext<'_, Editor>,
 5829    ) -> HashMap<BufferId, Vec<(Range<text::Anchor>, Rope)>> {
 5830        let mut revert_changes = HashMap::default();
 5831        self.buffer.update(cx, |multi_buffer, cx| {
 5832            let multi_buffer_snapshot = multi_buffer.snapshot(cx);
 5833            for hunk in hunks_for_selections(&multi_buffer_snapshot, selections) {
 5834                Self::prepare_revert_change(&mut revert_changes, &multi_buffer, &hunk, cx);
 5835            }
 5836        });
 5837        revert_changes
 5838    }
 5839
 5840    fn prepare_revert_change(
 5841        revert_changes: &mut HashMap<BufferId, Vec<(Range<text::Anchor>, Rope)>>,
 5842        multi_buffer: &MultiBuffer,
 5843        hunk: &DiffHunk<MultiBufferRow>,
 5844        cx: &mut AppContext,
 5845    ) -> Option<()> {
 5846        let buffer = multi_buffer.buffer(hunk.buffer_id)?;
 5847        let buffer = buffer.read(cx);
 5848        let original_text = buffer.diff_base()?.slice(hunk.diff_base_byte_range.clone());
 5849        let buffer_snapshot = buffer.snapshot();
 5850        let buffer_revert_changes = revert_changes.entry(buffer.remote_id()).or_default();
 5851        if let Err(i) = buffer_revert_changes.binary_search_by(|probe| {
 5852            probe
 5853                .0
 5854                .start
 5855                .cmp(&hunk.buffer_range.start, &buffer_snapshot)
 5856                .then(probe.0.end.cmp(&hunk.buffer_range.end, &buffer_snapshot))
 5857        }) {
 5858            buffer_revert_changes.insert(i, (hunk.buffer_range.clone(), original_text));
 5859            Some(())
 5860        } else {
 5861            None
 5862        }
 5863    }
 5864
 5865    pub fn reverse_lines(&mut self, _: &ReverseLines, cx: &mut ViewContext<Self>) {
 5866        self.manipulate_lines(cx, |lines| lines.reverse())
 5867    }
 5868
 5869    pub fn shuffle_lines(&mut self, _: &ShuffleLines, cx: &mut ViewContext<Self>) {
 5870        self.manipulate_lines(cx, |lines| lines.shuffle(&mut thread_rng()))
 5871    }
 5872
 5873    fn manipulate_lines<Fn>(&mut self, cx: &mut ViewContext<Self>, mut callback: Fn)
 5874    where
 5875        Fn: FnMut(&mut Vec<&str>),
 5876    {
 5877        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 5878        let buffer = self.buffer.read(cx).snapshot(cx);
 5879
 5880        let mut edits = Vec::new();
 5881
 5882        let selections = self.selections.all::<Point>(cx);
 5883        let mut selections = selections.iter().peekable();
 5884        let mut contiguous_row_selections = Vec::new();
 5885        let mut new_selections = Vec::new();
 5886        let mut added_lines = 0;
 5887        let mut removed_lines = 0;
 5888
 5889        while let Some(selection) = selections.next() {
 5890            let (start_row, end_row) = consume_contiguous_rows(
 5891                &mut contiguous_row_selections,
 5892                selection,
 5893                &display_map,
 5894                &mut selections,
 5895            );
 5896
 5897            let start_point = Point::new(start_row.0, 0);
 5898            let end_point = Point::new(
 5899                end_row.previous_row().0,
 5900                buffer.line_len(end_row.previous_row()),
 5901            );
 5902            let text = buffer
 5903                .text_for_range(start_point..end_point)
 5904                .collect::<String>();
 5905
 5906            let mut lines = text.split('\n').collect_vec();
 5907
 5908            let lines_before = lines.len();
 5909            callback(&mut lines);
 5910            let lines_after = lines.len();
 5911
 5912            edits.push((start_point..end_point, lines.join("\n")));
 5913
 5914            // Selections must change based on added and removed line count
 5915            let start_row =
 5916                MultiBufferRow(start_point.row + added_lines as u32 - removed_lines as u32);
 5917            let end_row = MultiBufferRow(start_row.0 + lines_after.saturating_sub(1) as u32);
 5918            new_selections.push(Selection {
 5919                id: selection.id,
 5920                start: start_row,
 5921                end: end_row,
 5922                goal: SelectionGoal::None,
 5923                reversed: selection.reversed,
 5924            });
 5925
 5926            if lines_after > lines_before {
 5927                added_lines += lines_after - lines_before;
 5928            } else if lines_before > lines_after {
 5929                removed_lines += lines_before - lines_after;
 5930            }
 5931        }
 5932
 5933        self.transact(cx, |this, cx| {
 5934            let buffer = this.buffer.update(cx, |buffer, cx| {
 5935                buffer.edit(edits, None, cx);
 5936                buffer.snapshot(cx)
 5937            });
 5938
 5939            // Recalculate offsets on newly edited buffer
 5940            let new_selections = new_selections
 5941                .iter()
 5942                .map(|s| {
 5943                    let start_point = Point::new(s.start.0, 0);
 5944                    let end_point = Point::new(s.end.0, buffer.line_len(s.end));
 5945                    Selection {
 5946                        id: s.id,
 5947                        start: buffer.point_to_offset(start_point),
 5948                        end: buffer.point_to_offset(end_point),
 5949                        goal: s.goal,
 5950                        reversed: s.reversed,
 5951                    }
 5952                })
 5953                .collect();
 5954
 5955            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 5956                s.select(new_selections);
 5957            });
 5958
 5959            this.request_autoscroll(Autoscroll::fit(), cx);
 5960        });
 5961    }
 5962
 5963    pub fn convert_to_upper_case(&mut self, _: &ConvertToUpperCase, cx: &mut ViewContext<Self>) {
 5964        self.manipulate_text(cx, |text| text.to_uppercase())
 5965    }
 5966
 5967    pub fn convert_to_lower_case(&mut self, _: &ConvertToLowerCase, cx: &mut ViewContext<Self>) {
 5968        self.manipulate_text(cx, |text| text.to_lowercase())
 5969    }
 5970
 5971    pub fn convert_to_title_case(&mut self, _: &ConvertToTitleCase, cx: &mut ViewContext<Self>) {
 5972        self.manipulate_text(cx, |text| {
 5973            // Hack to get around the fact that to_case crate doesn't support '\n' as a word boundary
 5974            // https://github.com/rutrum/convert-case/issues/16
 5975            text.split('\n')
 5976                .map(|line| line.to_case(Case::Title))
 5977                .join("\n")
 5978        })
 5979    }
 5980
 5981    pub fn convert_to_snake_case(&mut self, _: &ConvertToSnakeCase, cx: &mut ViewContext<Self>) {
 5982        self.manipulate_text(cx, |text| text.to_case(Case::Snake))
 5983    }
 5984
 5985    pub fn convert_to_kebab_case(&mut self, _: &ConvertToKebabCase, cx: &mut ViewContext<Self>) {
 5986        self.manipulate_text(cx, |text| text.to_case(Case::Kebab))
 5987    }
 5988
 5989    pub fn convert_to_upper_camel_case(
 5990        &mut self,
 5991        _: &ConvertToUpperCamelCase,
 5992        cx: &mut ViewContext<Self>,
 5993    ) {
 5994        self.manipulate_text(cx, |text| {
 5995            // Hack to get around the fact that to_case crate doesn't support '\n' as a word boundary
 5996            // https://github.com/rutrum/convert-case/issues/16
 5997            text.split('\n')
 5998                .map(|line| line.to_case(Case::UpperCamel))
 5999                .join("\n")
 6000        })
 6001    }
 6002
 6003    pub fn convert_to_lower_camel_case(
 6004        &mut self,
 6005        _: &ConvertToLowerCamelCase,
 6006        cx: &mut ViewContext<Self>,
 6007    ) {
 6008        self.manipulate_text(cx, |text| text.to_case(Case::Camel))
 6009    }
 6010
 6011    pub fn convert_to_opposite_case(
 6012        &mut self,
 6013        _: &ConvertToOppositeCase,
 6014        cx: &mut ViewContext<Self>,
 6015    ) {
 6016        self.manipulate_text(cx, |text| {
 6017            text.chars()
 6018                .fold(String::with_capacity(text.len()), |mut t, c| {
 6019                    if c.is_uppercase() {
 6020                        t.extend(c.to_lowercase());
 6021                    } else {
 6022                        t.extend(c.to_uppercase());
 6023                    }
 6024                    t
 6025                })
 6026        })
 6027    }
 6028
 6029    fn manipulate_text<Fn>(&mut self, cx: &mut ViewContext<Self>, mut callback: Fn)
 6030    where
 6031        Fn: FnMut(&str) -> String,
 6032    {
 6033        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6034        let buffer = self.buffer.read(cx).snapshot(cx);
 6035
 6036        let mut new_selections = Vec::new();
 6037        let mut edits = Vec::new();
 6038        let mut selection_adjustment = 0i32;
 6039
 6040        for selection in self.selections.all::<usize>(cx) {
 6041            let selection_is_empty = selection.is_empty();
 6042
 6043            let (start, end) = if selection_is_empty {
 6044                let word_range = movement::surrounding_word(
 6045                    &display_map,
 6046                    selection.start.to_display_point(&display_map),
 6047                );
 6048                let start = word_range.start.to_offset(&display_map, Bias::Left);
 6049                let end = word_range.end.to_offset(&display_map, Bias::Left);
 6050                (start, end)
 6051            } else {
 6052                (selection.start, selection.end)
 6053            };
 6054
 6055            let text = buffer.text_for_range(start..end).collect::<String>();
 6056            let old_length = text.len() as i32;
 6057            let text = callback(&text);
 6058
 6059            new_selections.push(Selection {
 6060                start: (start as i32 - selection_adjustment) as usize,
 6061                end: ((start + text.len()) as i32 - selection_adjustment) as usize,
 6062                goal: SelectionGoal::None,
 6063                ..selection
 6064            });
 6065
 6066            selection_adjustment += old_length - text.len() as i32;
 6067
 6068            edits.push((start..end, text));
 6069        }
 6070
 6071        self.transact(cx, |this, cx| {
 6072            this.buffer.update(cx, |buffer, cx| {
 6073                buffer.edit(edits, None, cx);
 6074            });
 6075
 6076            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6077                s.select(new_selections);
 6078            });
 6079
 6080            this.request_autoscroll(Autoscroll::fit(), cx);
 6081        });
 6082    }
 6083
 6084    pub fn duplicate_line(&mut self, upwards: bool, cx: &mut ViewContext<Self>) {
 6085        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6086        let buffer = &display_map.buffer_snapshot;
 6087        let selections = self.selections.all::<Point>(cx);
 6088
 6089        let mut edits = Vec::new();
 6090        let mut selections_iter = selections.iter().peekable();
 6091        while let Some(selection) = selections_iter.next() {
 6092            // Avoid duplicating the same lines twice.
 6093            let mut rows = selection.spanned_rows(false, &display_map);
 6094
 6095            while let Some(next_selection) = selections_iter.peek() {
 6096                let next_rows = next_selection.spanned_rows(false, &display_map);
 6097                if next_rows.start < rows.end {
 6098                    rows.end = next_rows.end;
 6099                    selections_iter.next().unwrap();
 6100                } else {
 6101                    break;
 6102                }
 6103            }
 6104
 6105            // Copy the text from the selected row region and splice it either at the start
 6106            // or end of the region.
 6107            let start = Point::new(rows.start.0, 0);
 6108            let end = Point::new(
 6109                rows.end.previous_row().0,
 6110                buffer.line_len(rows.end.previous_row()),
 6111            );
 6112            let text = buffer
 6113                .text_for_range(start..end)
 6114                .chain(Some("\n"))
 6115                .collect::<String>();
 6116            let insert_location = if upwards {
 6117                Point::new(rows.end.0, 0)
 6118            } else {
 6119                start
 6120            };
 6121            edits.push((insert_location..insert_location, text));
 6122        }
 6123
 6124        self.transact(cx, |this, cx| {
 6125            this.buffer.update(cx, |buffer, cx| {
 6126                buffer.edit(edits, None, cx);
 6127            });
 6128
 6129            this.request_autoscroll(Autoscroll::fit(), cx);
 6130        });
 6131    }
 6132
 6133    pub fn duplicate_line_up(&mut self, _: &DuplicateLineUp, cx: &mut ViewContext<Self>) {
 6134        self.duplicate_line(true, cx);
 6135    }
 6136
 6137    pub fn duplicate_line_down(&mut self, _: &DuplicateLineDown, cx: &mut ViewContext<Self>) {
 6138        self.duplicate_line(false, cx);
 6139    }
 6140
 6141    pub fn move_line_up(&mut self, _: &MoveLineUp, cx: &mut ViewContext<Self>) {
 6142        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6143        let buffer = self.buffer.read(cx).snapshot(cx);
 6144
 6145        let mut edits = Vec::new();
 6146        let mut unfold_ranges = Vec::new();
 6147        let mut refold_ranges = Vec::new();
 6148
 6149        let selections = self.selections.all::<Point>(cx);
 6150        let mut selections = selections.iter().peekable();
 6151        let mut contiguous_row_selections = Vec::new();
 6152        let mut new_selections = Vec::new();
 6153
 6154        while let Some(selection) = selections.next() {
 6155            // Find all the selections that span a contiguous row range
 6156            let (start_row, end_row) = consume_contiguous_rows(
 6157                &mut contiguous_row_selections,
 6158                selection,
 6159                &display_map,
 6160                &mut selections,
 6161            );
 6162
 6163            // Move the text spanned by the row range to be before the line preceding the row range
 6164            if start_row.0 > 0 {
 6165                let range_to_move = Point::new(
 6166                    start_row.previous_row().0,
 6167                    buffer.line_len(start_row.previous_row()),
 6168                )
 6169                    ..Point::new(
 6170                        end_row.previous_row().0,
 6171                        buffer.line_len(end_row.previous_row()),
 6172                    );
 6173                let insertion_point = display_map
 6174                    .prev_line_boundary(Point::new(start_row.previous_row().0, 0))
 6175                    .0;
 6176
 6177                // Don't move lines across excerpts
 6178                if buffer
 6179                    .excerpt_boundaries_in_range((
 6180                        Bound::Excluded(insertion_point),
 6181                        Bound::Included(range_to_move.end),
 6182                    ))
 6183                    .next()
 6184                    .is_none()
 6185                {
 6186                    let text = buffer
 6187                        .text_for_range(range_to_move.clone())
 6188                        .flat_map(|s| s.chars())
 6189                        .skip(1)
 6190                        .chain(['\n'])
 6191                        .collect::<String>();
 6192
 6193                    edits.push((
 6194                        buffer.anchor_after(range_to_move.start)
 6195                            ..buffer.anchor_before(range_to_move.end),
 6196                        String::new(),
 6197                    ));
 6198                    let insertion_anchor = buffer.anchor_after(insertion_point);
 6199                    edits.push((insertion_anchor..insertion_anchor, text));
 6200
 6201                    let row_delta = range_to_move.start.row - insertion_point.row + 1;
 6202
 6203                    // Move selections up
 6204                    new_selections.extend(contiguous_row_selections.drain(..).map(
 6205                        |mut selection| {
 6206                            selection.start.row -= row_delta;
 6207                            selection.end.row -= row_delta;
 6208                            selection
 6209                        },
 6210                    ));
 6211
 6212                    // Move folds up
 6213                    unfold_ranges.push(range_to_move.clone());
 6214                    for fold in display_map.folds_in_range(
 6215                        buffer.anchor_before(range_to_move.start)
 6216                            ..buffer.anchor_after(range_to_move.end),
 6217                    ) {
 6218                        let mut start = fold.range.start.to_point(&buffer);
 6219                        let mut end = fold.range.end.to_point(&buffer);
 6220                        start.row -= row_delta;
 6221                        end.row -= row_delta;
 6222                        refold_ranges.push((start..end, fold.placeholder.clone()));
 6223                    }
 6224                }
 6225            }
 6226
 6227            // If we didn't move line(s), preserve the existing selections
 6228            new_selections.append(&mut contiguous_row_selections);
 6229        }
 6230
 6231        self.transact(cx, |this, cx| {
 6232            this.unfold_ranges(unfold_ranges, true, true, cx);
 6233            this.buffer.update(cx, |buffer, cx| {
 6234                for (range, text) in edits {
 6235                    buffer.edit([(range, text)], None, cx);
 6236                }
 6237            });
 6238            this.fold_ranges(refold_ranges, true, cx);
 6239            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6240                s.select(new_selections);
 6241            })
 6242        });
 6243    }
 6244
 6245    pub fn move_line_down(&mut self, _: &MoveLineDown, cx: &mut ViewContext<Self>) {
 6246        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 6247        let buffer = self.buffer.read(cx).snapshot(cx);
 6248
 6249        let mut edits = Vec::new();
 6250        let mut unfold_ranges = Vec::new();
 6251        let mut refold_ranges = Vec::new();
 6252
 6253        let selections = self.selections.all::<Point>(cx);
 6254        let mut selections = selections.iter().peekable();
 6255        let mut contiguous_row_selections = Vec::new();
 6256        let mut new_selections = Vec::new();
 6257
 6258        while let Some(selection) = selections.next() {
 6259            // Find all the selections that span a contiguous row range
 6260            let (start_row, end_row) = consume_contiguous_rows(
 6261                &mut contiguous_row_selections,
 6262                selection,
 6263                &display_map,
 6264                &mut selections,
 6265            );
 6266
 6267            // Move the text spanned by the row range to be after the last line of the row range
 6268            if end_row.0 <= buffer.max_point().row {
 6269                let range_to_move =
 6270                    MultiBufferPoint::new(start_row.0, 0)..MultiBufferPoint::new(end_row.0, 0);
 6271                let insertion_point = display_map
 6272                    .next_line_boundary(MultiBufferPoint::new(end_row.0, 0))
 6273                    .0;
 6274
 6275                // Don't move lines across excerpt boundaries
 6276                if buffer
 6277                    .excerpt_boundaries_in_range((
 6278                        Bound::Excluded(range_to_move.start),
 6279                        Bound::Included(insertion_point),
 6280                    ))
 6281                    .next()
 6282                    .is_none()
 6283                {
 6284                    let mut text = String::from("\n");
 6285                    text.extend(buffer.text_for_range(range_to_move.clone()));
 6286                    text.pop(); // Drop trailing newline
 6287                    edits.push((
 6288                        buffer.anchor_after(range_to_move.start)
 6289                            ..buffer.anchor_before(range_to_move.end),
 6290                        String::new(),
 6291                    ));
 6292                    let insertion_anchor = buffer.anchor_after(insertion_point);
 6293                    edits.push((insertion_anchor..insertion_anchor, text));
 6294
 6295                    let row_delta = insertion_point.row - range_to_move.end.row + 1;
 6296
 6297                    // Move selections down
 6298                    new_selections.extend(contiguous_row_selections.drain(..).map(
 6299                        |mut selection| {
 6300                            selection.start.row += row_delta;
 6301                            selection.end.row += row_delta;
 6302                            selection
 6303                        },
 6304                    ));
 6305
 6306                    // Move folds down
 6307                    unfold_ranges.push(range_to_move.clone());
 6308                    for fold in display_map.folds_in_range(
 6309                        buffer.anchor_before(range_to_move.start)
 6310                            ..buffer.anchor_after(range_to_move.end),
 6311                    ) {
 6312                        let mut start = fold.range.start.to_point(&buffer);
 6313                        let mut end = fold.range.end.to_point(&buffer);
 6314                        start.row += row_delta;
 6315                        end.row += row_delta;
 6316                        refold_ranges.push((start..end, fold.placeholder.clone()));
 6317                    }
 6318                }
 6319            }
 6320
 6321            // If we didn't move line(s), preserve the existing selections
 6322            new_selections.append(&mut contiguous_row_selections);
 6323        }
 6324
 6325        self.transact(cx, |this, cx| {
 6326            this.unfold_ranges(unfold_ranges, true, true, cx);
 6327            this.buffer.update(cx, |buffer, cx| {
 6328                for (range, text) in edits {
 6329                    buffer.edit([(range, text)], None, cx);
 6330                }
 6331            });
 6332            this.fold_ranges(refold_ranges, true, cx);
 6333            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(new_selections));
 6334        });
 6335    }
 6336
 6337    pub fn transpose(&mut self, _: &Transpose, cx: &mut ViewContext<Self>) {
 6338        let text_layout_details = &self.text_layout_details(cx);
 6339        self.transact(cx, |this, cx| {
 6340            let edits = this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6341                let mut edits: Vec<(Range<usize>, String)> = Default::default();
 6342                let line_mode = s.line_mode;
 6343                s.move_with(|display_map, selection| {
 6344                    if !selection.is_empty() || line_mode {
 6345                        return;
 6346                    }
 6347
 6348                    let mut head = selection.head();
 6349                    let mut transpose_offset = head.to_offset(display_map, Bias::Right);
 6350                    if head.column() == display_map.line_len(head.row()) {
 6351                        transpose_offset = display_map
 6352                            .buffer_snapshot
 6353                            .clip_offset(transpose_offset.saturating_sub(1), Bias::Left);
 6354                    }
 6355
 6356                    if transpose_offset == 0 {
 6357                        return;
 6358                    }
 6359
 6360                    *head.column_mut() += 1;
 6361                    head = display_map.clip_point(head, Bias::Right);
 6362                    let goal = SelectionGoal::HorizontalPosition(
 6363                        display_map
 6364                            .x_for_display_point(head, &text_layout_details)
 6365                            .into(),
 6366                    );
 6367                    selection.collapse_to(head, goal);
 6368
 6369                    let transpose_start = display_map
 6370                        .buffer_snapshot
 6371                        .clip_offset(transpose_offset.saturating_sub(1), Bias::Left);
 6372                    if edits.last().map_or(true, |e| e.0.end <= transpose_start) {
 6373                        let transpose_end = display_map
 6374                            .buffer_snapshot
 6375                            .clip_offset(transpose_offset + 1, Bias::Right);
 6376                        if let Some(ch) =
 6377                            display_map.buffer_snapshot.chars_at(transpose_start).next()
 6378                        {
 6379                            edits.push((transpose_start..transpose_offset, String::new()));
 6380                            edits.push((transpose_end..transpose_end, ch.to_string()));
 6381                        }
 6382                    }
 6383                });
 6384                edits
 6385            });
 6386            this.buffer
 6387                .update(cx, |buffer, cx| buffer.edit(edits, None, cx));
 6388            let selections = this.selections.all::<usize>(cx);
 6389            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6390                s.select(selections);
 6391            });
 6392        });
 6393    }
 6394
 6395    pub fn cut(&mut self, _: &Cut, cx: &mut ViewContext<Self>) {
 6396        let mut text = String::new();
 6397        let buffer = self.buffer.read(cx).snapshot(cx);
 6398        let mut selections = self.selections.all::<Point>(cx);
 6399        let mut clipboard_selections = Vec::with_capacity(selections.len());
 6400        {
 6401            let max_point = buffer.max_point();
 6402            let mut is_first = true;
 6403            for selection in &mut selections {
 6404                let is_entire_line = selection.is_empty() || self.selections.line_mode;
 6405                if is_entire_line {
 6406                    selection.start = Point::new(selection.start.row, 0);
 6407                    selection.end = cmp::min(max_point, Point::new(selection.end.row + 1, 0));
 6408                    selection.goal = SelectionGoal::None;
 6409                }
 6410                if is_first {
 6411                    is_first = false;
 6412                } else {
 6413                    text += "\n";
 6414                }
 6415                let mut len = 0;
 6416                for chunk in buffer.text_for_range(selection.start..selection.end) {
 6417                    text.push_str(chunk);
 6418                    len += chunk.len();
 6419                }
 6420                clipboard_selections.push(ClipboardSelection {
 6421                    len,
 6422                    is_entire_line,
 6423                    first_line_indent: buffer
 6424                        .indent_size_for_line(MultiBufferRow(selection.start.row))
 6425                        .len,
 6426                });
 6427            }
 6428        }
 6429
 6430        self.transact(cx, |this, cx| {
 6431            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6432                s.select(selections);
 6433            });
 6434            this.insert("", cx);
 6435            cx.write_to_clipboard(ClipboardItem::new(text).with_metadata(clipboard_selections));
 6436        });
 6437    }
 6438
 6439    pub fn copy(&mut self, _: &Copy, cx: &mut ViewContext<Self>) {
 6440        let selections = self.selections.all::<Point>(cx);
 6441        let buffer = self.buffer.read(cx).read(cx);
 6442        let mut text = String::new();
 6443
 6444        let mut clipboard_selections = Vec::with_capacity(selections.len());
 6445        {
 6446            let max_point = buffer.max_point();
 6447            let mut is_first = true;
 6448            for selection in selections.iter() {
 6449                let mut start = selection.start;
 6450                let mut end = selection.end;
 6451                let is_entire_line = selection.is_empty() || self.selections.line_mode;
 6452                if is_entire_line {
 6453                    start = Point::new(start.row, 0);
 6454                    end = cmp::min(max_point, Point::new(end.row + 1, 0));
 6455                }
 6456                if is_first {
 6457                    is_first = false;
 6458                } else {
 6459                    text += "\n";
 6460                }
 6461                let mut len = 0;
 6462                for chunk in buffer.text_for_range(start..end) {
 6463                    text.push_str(chunk);
 6464                    len += chunk.len();
 6465                }
 6466                clipboard_selections.push(ClipboardSelection {
 6467                    len,
 6468                    is_entire_line,
 6469                    first_line_indent: buffer.indent_size_for_line(MultiBufferRow(start.row)).len,
 6470                });
 6471            }
 6472        }
 6473
 6474        cx.write_to_clipboard(ClipboardItem::new(text).with_metadata(clipboard_selections));
 6475    }
 6476
 6477    pub fn do_paste(
 6478        &mut self,
 6479        text: &String,
 6480        clipboard_selections: Option<Vec<ClipboardSelection>>,
 6481        handle_entire_lines: bool,
 6482        cx: &mut ViewContext<Self>,
 6483    ) {
 6484        if self.read_only(cx) {
 6485            return;
 6486        }
 6487
 6488        let clipboard_text = Cow::Borrowed(text);
 6489
 6490        self.transact(cx, |this, cx| {
 6491            if let Some(mut clipboard_selections) = clipboard_selections {
 6492                let old_selections = this.selections.all::<usize>(cx);
 6493                let all_selections_were_entire_line =
 6494                    clipboard_selections.iter().all(|s| s.is_entire_line);
 6495                let first_selection_indent_column =
 6496                    clipboard_selections.first().map(|s| s.first_line_indent);
 6497                if clipboard_selections.len() != old_selections.len() {
 6498                    clipboard_selections.drain(..);
 6499                }
 6500
 6501                this.buffer.update(cx, |buffer, cx| {
 6502                    let snapshot = buffer.read(cx);
 6503                    let mut start_offset = 0;
 6504                    let mut edits = Vec::new();
 6505                    let mut original_indent_columns = Vec::new();
 6506                    for (ix, selection) in old_selections.iter().enumerate() {
 6507                        let to_insert;
 6508                        let entire_line;
 6509                        let original_indent_column;
 6510                        if let Some(clipboard_selection) = clipboard_selections.get(ix) {
 6511                            let end_offset = start_offset + clipboard_selection.len;
 6512                            to_insert = &clipboard_text[start_offset..end_offset];
 6513                            entire_line = clipboard_selection.is_entire_line;
 6514                            start_offset = end_offset + 1;
 6515                            original_indent_column = Some(clipboard_selection.first_line_indent);
 6516                        } else {
 6517                            to_insert = clipboard_text.as_str();
 6518                            entire_line = all_selections_were_entire_line;
 6519                            original_indent_column = first_selection_indent_column
 6520                        }
 6521
 6522                        // If the corresponding selection was empty when this slice of the
 6523                        // clipboard text was written, then the entire line containing the
 6524                        // selection was copied. If this selection is also currently empty,
 6525                        // then paste the line before the current line of the buffer.
 6526                        let range = if selection.is_empty() && handle_entire_lines && entire_line {
 6527                            let column = selection.start.to_point(&snapshot).column as usize;
 6528                            let line_start = selection.start - column;
 6529                            line_start..line_start
 6530                        } else {
 6531                            selection.range()
 6532                        };
 6533
 6534                        edits.push((range, to_insert));
 6535                        original_indent_columns.extend(original_indent_column);
 6536                    }
 6537                    drop(snapshot);
 6538
 6539                    buffer.edit(
 6540                        edits,
 6541                        Some(AutoindentMode::Block {
 6542                            original_indent_columns,
 6543                        }),
 6544                        cx,
 6545                    );
 6546                });
 6547
 6548                let selections = this.selections.all::<usize>(cx);
 6549                this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 6550            } else {
 6551                this.insert(&clipboard_text, cx);
 6552            }
 6553        });
 6554    }
 6555
 6556    pub fn paste(&mut self, _: &Paste, cx: &mut ViewContext<Self>) {
 6557        if let Some(item) = cx.read_from_clipboard() {
 6558            self.do_paste(
 6559                item.text(),
 6560                item.metadata::<Vec<ClipboardSelection>>(),
 6561                true,
 6562                cx,
 6563            )
 6564        };
 6565    }
 6566
 6567    pub fn undo(&mut self, _: &Undo, cx: &mut ViewContext<Self>) {
 6568        if self.read_only(cx) {
 6569            return;
 6570        }
 6571
 6572        if let Some(transaction_id) = self.buffer.update(cx, |buffer, cx| buffer.undo(cx)) {
 6573            if let Some((selections, _)) =
 6574                self.selection_history.transaction(transaction_id).cloned()
 6575            {
 6576                self.change_selections(None, cx, |s| {
 6577                    s.select_anchors(selections.to_vec());
 6578                });
 6579            }
 6580            self.request_autoscroll(Autoscroll::fit(), cx);
 6581            self.unmark_text(cx);
 6582            self.refresh_inline_completion(true, cx);
 6583            cx.emit(EditorEvent::Edited { transaction_id });
 6584            cx.emit(EditorEvent::TransactionUndone { transaction_id });
 6585        }
 6586    }
 6587
 6588    pub fn redo(&mut self, _: &Redo, cx: &mut ViewContext<Self>) {
 6589        if self.read_only(cx) {
 6590            return;
 6591        }
 6592
 6593        if let Some(transaction_id) = self.buffer.update(cx, |buffer, cx| buffer.redo(cx)) {
 6594            if let Some((_, Some(selections))) =
 6595                self.selection_history.transaction(transaction_id).cloned()
 6596            {
 6597                self.change_selections(None, cx, |s| {
 6598                    s.select_anchors(selections.to_vec());
 6599                });
 6600            }
 6601            self.request_autoscroll(Autoscroll::fit(), cx);
 6602            self.unmark_text(cx);
 6603            self.refresh_inline_completion(true, cx);
 6604            cx.emit(EditorEvent::Edited { transaction_id });
 6605        }
 6606    }
 6607
 6608    pub fn finalize_last_transaction(&mut self, cx: &mut ViewContext<Self>) {
 6609        self.buffer
 6610            .update(cx, |buffer, cx| buffer.finalize_last_transaction(cx));
 6611    }
 6612
 6613    pub fn group_until_transaction(&mut self, tx_id: TransactionId, cx: &mut ViewContext<Self>) {
 6614        self.buffer
 6615            .update(cx, |buffer, cx| buffer.group_until_transaction(tx_id, cx));
 6616    }
 6617
 6618    pub fn move_left(&mut self, _: &MoveLeft, cx: &mut ViewContext<Self>) {
 6619        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6620            let line_mode = s.line_mode;
 6621            s.move_with(|map, selection| {
 6622                let cursor = if selection.is_empty() && !line_mode {
 6623                    movement::left(map, selection.start)
 6624                } else {
 6625                    selection.start
 6626                };
 6627                selection.collapse_to(cursor, SelectionGoal::None);
 6628            });
 6629        })
 6630    }
 6631
 6632    pub fn select_left(&mut self, _: &SelectLeft, cx: &mut ViewContext<Self>) {
 6633        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6634            s.move_heads_with(|map, head, _| (movement::left(map, head), SelectionGoal::None));
 6635        })
 6636    }
 6637
 6638    pub fn move_right(&mut self, _: &MoveRight, cx: &mut ViewContext<Self>) {
 6639        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6640            let line_mode = s.line_mode;
 6641            s.move_with(|map, selection| {
 6642                let cursor = if selection.is_empty() && !line_mode {
 6643                    movement::right(map, selection.end)
 6644                } else {
 6645                    selection.end
 6646                };
 6647                selection.collapse_to(cursor, SelectionGoal::None)
 6648            });
 6649        })
 6650    }
 6651
 6652    pub fn select_right(&mut self, _: &SelectRight, cx: &mut ViewContext<Self>) {
 6653        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6654            s.move_heads_with(|map, head, _| (movement::right(map, head), SelectionGoal::None));
 6655        })
 6656    }
 6657
 6658    pub fn move_up(&mut self, _: &MoveUp, cx: &mut ViewContext<Self>) {
 6659        if self.take_rename(true, cx).is_some() {
 6660            return;
 6661        }
 6662
 6663        if matches!(self.mode, EditorMode::SingleLine) {
 6664            cx.propagate();
 6665            return;
 6666        }
 6667
 6668        let text_layout_details = &self.text_layout_details(cx);
 6669        let selection_count = self.selections.count();
 6670        let first_selection = self.selections.first_anchor();
 6671
 6672        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6673            let line_mode = s.line_mode;
 6674            s.move_with(|map, selection| {
 6675                if !selection.is_empty() && !line_mode {
 6676                    selection.goal = SelectionGoal::None;
 6677                }
 6678                let (cursor, goal) = movement::up(
 6679                    map,
 6680                    selection.start,
 6681                    selection.goal,
 6682                    false,
 6683                    &text_layout_details,
 6684                );
 6685                selection.collapse_to(cursor, goal);
 6686            });
 6687        });
 6688
 6689        if selection_count == 1 && first_selection.range() == self.selections.first_anchor().range()
 6690        {
 6691            cx.propagate();
 6692        }
 6693    }
 6694
 6695    pub fn move_up_by_lines(&mut self, action: &MoveUpByLines, cx: &mut ViewContext<Self>) {
 6696        if self.take_rename(true, cx).is_some() {
 6697            return;
 6698        }
 6699
 6700        if matches!(self.mode, EditorMode::SingleLine) {
 6701            cx.propagate();
 6702            return;
 6703        }
 6704
 6705        let text_layout_details = &self.text_layout_details(cx);
 6706
 6707        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6708            let line_mode = s.line_mode;
 6709            s.move_with(|map, selection| {
 6710                if !selection.is_empty() && !line_mode {
 6711                    selection.goal = SelectionGoal::None;
 6712                }
 6713                let (cursor, goal) = movement::up_by_rows(
 6714                    map,
 6715                    selection.start,
 6716                    action.lines,
 6717                    selection.goal,
 6718                    false,
 6719                    &text_layout_details,
 6720                );
 6721                selection.collapse_to(cursor, goal);
 6722            });
 6723        })
 6724    }
 6725
 6726    pub fn move_down_by_lines(&mut self, action: &MoveDownByLines, cx: &mut ViewContext<Self>) {
 6727        if self.take_rename(true, cx).is_some() {
 6728            return;
 6729        }
 6730
 6731        if matches!(self.mode, EditorMode::SingleLine) {
 6732            cx.propagate();
 6733            return;
 6734        }
 6735
 6736        let text_layout_details = &self.text_layout_details(cx);
 6737
 6738        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6739            let line_mode = s.line_mode;
 6740            s.move_with(|map, selection| {
 6741                if !selection.is_empty() && !line_mode {
 6742                    selection.goal = SelectionGoal::None;
 6743                }
 6744                let (cursor, goal) = movement::down_by_rows(
 6745                    map,
 6746                    selection.start,
 6747                    action.lines,
 6748                    selection.goal,
 6749                    false,
 6750                    &text_layout_details,
 6751                );
 6752                selection.collapse_to(cursor, goal);
 6753            });
 6754        })
 6755    }
 6756
 6757    pub fn select_down_by_lines(&mut self, action: &SelectDownByLines, cx: &mut ViewContext<Self>) {
 6758        let text_layout_details = &self.text_layout_details(cx);
 6759        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6760            s.move_heads_with(|map, head, goal| {
 6761                movement::down_by_rows(map, head, action.lines, goal, false, &text_layout_details)
 6762            })
 6763        })
 6764    }
 6765
 6766    pub fn select_up_by_lines(&mut self, action: &SelectUpByLines, cx: &mut ViewContext<Self>) {
 6767        let text_layout_details = &self.text_layout_details(cx);
 6768        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6769            s.move_heads_with(|map, head, goal| {
 6770                movement::up_by_rows(map, head, action.lines, goal, false, &text_layout_details)
 6771            })
 6772        })
 6773    }
 6774
 6775    pub fn select_page_up(&mut self, _: &SelectPageUp, cx: &mut ViewContext<Self>) {
 6776        let Some(row_count) = self.visible_row_count() else {
 6777            return;
 6778        };
 6779
 6780        let text_layout_details = &self.text_layout_details(cx);
 6781
 6782        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6783            s.move_heads_with(|map, head, goal| {
 6784                movement::up_by_rows(map, head, row_count, goal, false, &text_layout_details)
 6785            })
 6786        })
 6787    }
 6788
 6789    pub fn move_page_up(&mut self, action: &MovePageUp, cx: &mut ViewContext<Self>) {
 6790        if self.take_rename(true, cx).is_some() {
 6791            return;
 6792        }
 6793
 6794        if matches!(self.mode, EditorMode::SingleLine) {
 6795            cx.propagate();
 6796            return;
 6797        }
 6798
 6799        let Some(row_count) = self.visible_row_count() else {
 6800            return;
 6801        };
 6802
 6803        let autoscroll = if action.center_cursor {
 6804            Autoscroll::center()
 6805        } else {
 6806            Autoscroll::fit()
 6807        };
 6808
 6809        let text_layout_details = &self.text_layout_details(cx);
 6810
 6811        self.change_selections(Some(autoscroll), cx, |s| {
 6812            let line_mode = s.line_mode;
 6813            s.move_with(|map, selection| {
 6814                if !selection.is_empty() && !line_mode {
 6815                    selection.goal = SelectionGoal::None;
 6816                }
 6817                let (cursor, goal) = movement::up_by_rows(
 6818                    map,
 6819                    selection.end,
 6820                    row_count,
 6821                    selection.goal,
 6822                    false,
 6823                    &text_layout_details,
 6824                );
 6825                selection.collapse_to(cursor, goal);
 6826            });
 6827        });
 6828    }
 6829
 6830    pub fn select_up(&mut self, _: &SelectUp, cx: &mut ViewContext<Self>) {
 6831        let text_layout_details = &self.text_layout_details(cx);
 6832        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6833            s.move_heads_with(|map, head, goal| {
 6834                movement::up(map, head, goal, false, &text_layout_details)
 6835            })
 6836        })
 6837    }
 6838
 6839    pub fn move_down(&mut self, _: &MoveDown, cx: &mut ViewContext<Self>) {
 6840        self.take_rename(true, cx);
 6841
 6842        if self.mode == EditorMode::SingleLine {
 6843            cx.propagate();
 6844            return;
 6845        }
 6846
 6847        let text_layout_details = &self.text_layout_details(cx);
 6848        let selection_count = self.selections.count();
 6849        let first_selection = self.selections.first_anchor();
 6850
 6851        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6852            let line_mode = s.line_mode;
 6853            s.move_with(|map, selection| {
 6854                if !selection.is_empty() && !line_mode {
 6855                    selection.goal = SelectionGoal::None;
 6856                }
 6857                let (cursor, goal) = movement::down(
 6858                    map,
 6859                    selection.end,
 6860                    selection.goal,
 6861                    false,
 6862                    &text_layout_details,
 6863                );
 6864                selection.collapse_to(cursor, goal);
 6865            });
 6866        });
 6867
 6868        if selection_count == 1 && first_selection.range() == self.selections.first_anchor().range()
 6869        {
 6870            cx.propagate();
 6871        }
 6872    }
 6873
 6874    pub fn select_page_down(&mut self, _: &SelectPageDown, cx: &mut ViewContext<Self>) {
 6875        let Some(row_count) = self.visible_row_count() else {
 6876            return;
 6877        };
 6878
 6879        let text_layout_details = &self.text_layout_details(cx);
 6880
 6881        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6882            s.move_heads_with(|map, head, goal| {
 6883                movement::down_by_rows(map, head, row_count, goal, false, &text_layout_details)
 6884            })
 6885        })
 6886    }
 6887
 6888    pub fn move_page_down(&mut self, action: &MovePageDown, cx: &mut ViewContext<Self>) {
 6889        if self.take_rename(true, cx).is_some() {
 6890            return;
 6891        }
 6892
 6893        if self
 6894            .context_menu
 6895            .write()
 6896            .as_mut()
 6897            .map(|menu| menu.select_last(self.project.as_ref(), cx))
 6898            .unwrap_or(false)
 6899        {
 6900            return;
 6901        }
 6902
 6903        if matches!(self.mode, EditorMode::SingleLine) {
 6904            cx.propagate();
 6905            return;
 6906        }
 6907
 6908        let Some(row_count) = self.visible_row_count() else {
 6909            return;
 6910        };
 6911
 6912        let autoscroll = if action.center_cursor {
 6913            Autoscroll::center()
 6914        } else {
 6915            Autoscroll::fit()
 6916        };
 6917
 6918        let text_layout_details = &self.text_layout_details(cx);
 6919        self.change_selections(Some(autoscroll), cx, |s| {
 6920            let line_mode = s.line_mode;
 6921            s.move_with(|map, selection| {
 6922                if !selection.is_empty() && !line_mode {
 6923                    selection.goal = SelectionGoal::None;
 6924                }
 6925                let (cursor, goal) = movement::down_by_rows(
 6926                    map,
 6927                    selection.end,
 6928                    row_count,
 6929                    selection.goal,
 6930                    false,
 6931                    &text_layout_details,
 6932                );
 6933                selection.collapse_to(cursor, goal);
 6934            });
 6935        });
 6936    }
 6937
 6938    pub fn select_down(&mut self, _: &SelectDown, cx: &mut ViewContext<Self>) {
 6939        let text_layout_details = &self.text_layout_details(cx);
 6940        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6941            s.move_heads_with(|map, head, goal| {
 6942                movement::down(map, head, goal, false, &text_layout_details)
 6943            })
 6944        });
 6945    }
 6946
 6947    pub fn context_menu_first(&mut self, _: &ContextMenuFirst, cx: &mut ViewContext<Self>) {
 6948        if let Some(context_menu) = self.context_menu.write().as_mut() {
 6949            context_menu.select_first(self.project.as_ref(), cx);
 6950        }
 6951    }
 6952
 6953    pub fn context_menu_prev(&mut self, _: &ContextMenuPrev, cx: &mut ViewContext<Self>) {
 6954        if let Some(context_menu) = self.context_menu.write().as_mut() {
 6955            context_menu.select_prev(self.project.as_ref(), cx);
 6956        }
 6957    }
 6958
 6959    pub fn context_menu_next(&mut self, _: &ContextMenuNext, cx: &mut ViewContext<Self>) {
 6960        if let Some(context_menu) = self.context_menu.write().as_mut() {
 6961            context_menu.select_next(self.project.as_ref(), cx);
 6962        }
 6963    }
 6964
 6965    pub fn context_menu_last(&mut self, _: &ContextMenuLast, cx: &mut ViewContext<Self>) {
 6966        if let Some(context_menu) = self.context_menu.write().as_mut() {
 6967            context_menu.select_last(self.project.as_ref(), cx);
 6968        }
 6969    }
 6970
 6971    pub fn move_to_previous_word_start(
 6972        &mut self,
 6973        _: &MoveToPreviousWordStart,
 6974        cx: &mut ViewContext<Self>,
 6975    ) {
 6976        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6977            s.move_cursors_with(|map, head, _| {
 6978                (
 6979                    movement::previous_word_start(map, head),
 6980                    SelectionGoal::None,
 6981                )
 6982            });
 6983        })
 6984    }
 6985
 6986    pub fn move_to_previous_subword_start(
 6987        &mut self,
 6988        _: &MoveToPreviousSubwordStart,
 6989        cx: &mut ViewContext<Self>,
 6990    ) {
 6991        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 6992            s.move_cursors_with(|map, head, _| {
 6993                (
 6994                    movement::previous_subword_start(map, head),
 6995                    SelectionGoal::None,
 6996                )
 6997            });
 6998        })
 6999    }
 7000
 7001    pub fn select_to_previous_word_start(
 7002        &mut self,
 7003        _: &SelectToPreviousWordStart,
 7004        cx: &mut ViewContext<Self>,
 7005    ) {
 7006        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7007            s.move_heads_with(|map, head, _| {
 7008                (
 7009                    movement::previous_word_start(map, head),
 7010                    SelectionGoal::None,
 7011                )
 7012            });
 7013        })
 7014    }
 7015
 7016    pub fn select_to_previous_subword_start(
 7017        &mut self,
 7018        _: &SelectToPreviousSubwordStart,
 7019        cx: &mut ViewContext<Self>,
 7020    ) {
 7021        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7022            s.move_heads_with(|map, head, _| {
 7023                (
 7024                    movement::previous_subword_start(map, head),
 7025                    SelectionGoal::None,
 7026                )
 7027            });
 7028        })
 7029    }
 7030
 7031    pub fn delete_to_previous_word_start(
 7032        &mut self,
 7033        _: &DeleteToPreviousWordStart,
 7034        cx: &mut ViewContext<Self>,
 7035    ) {
 7036        self.transact(cx, |this, cx| {
 7037            this.select_autoclose_pair(cx);
 7038            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7039                let line_mode = s.line_mode;
 7040                s.move_with(|map, selection| {
 7041                    if selection.is_empty() && !line_mode {
 7042                        let cursor = movement::previous_word_start(map, selection.head());
 7043                        selection.set_head(cursor, SelectionGoal::None);
 7044                    }
 7045                });
 7046            });
 7047            this.insert("", cx);
 7048        });
 7049    }
 7050
 7051    pub fn delete_to_previous_subword_start(
 7052        &mut self,
 7053        _: &DeleteToPreviousSubwordStart,
 7054        cx: &mut ViewContext<Self>,
 7055    ) {
 7056        self.transact(cx, |this, cx| {
 7057            this.select_autoclose_pair(cx);
 7058            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7059                let line_mode = s.line_mode;
 7060                s.move_with(|map, selection| {
 7061                    if selection.is_empty() && !line_mode {
 7062                        let cursor = movement::previous_subword_start(map, selection.head());
 7063                        selection.set_head(cursor, SelectionGoal::None);
 7064                    }
 7065                });
 7066            });
 7067            this.insert("", cx);
 7068        });
 7069    }
 7070
 7071    pub fn move_to_next_word_end(&mut self, _: &MoveToNextWordEnd, cx: &mut ViewContext<Self>) {
 7072        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7073            s.move_cursors_with(|map, head, _| {
 7074                (movement::next_word_end(map, head), SelectionGoal::None)
 7075            });
 7076        })
 7077    }
 7078
 7079    pub fn move_to_next_subword_end(
 7080        &mut self,
 7081        _: &MoveToNextSubwordEnd,
 7082        cx: &mut ViewContext<Self>,
 7083    ) {
 7084        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7085            s.move_cursors_with(|map, head, _| {
 7086                (movement::next_subword_end(map, head), SelectionGoal::None)
 7087            });
 7088        })
 7089    }
 7090
 7091    pub fn select_to_next_word_end(&mut self, _: &SelectToNextWordEnd, cx: &mut ViewContext<Self>) {
 7092        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7093            s.move_heads_with(|map, head, _| {
 7094                (movement::next_word_end(map, head), SelectionGoal::None)
 7095            });
 7096        })
 7097    }
 7098
 7099    pub fn select_to_next_subword_end(
 7100        &mut self,
 7101        _: &SelectToNextSubwordEnd,
 7102        cx: &mut ViewContext<Self>,
 7103    ) {
 7104        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7105            s.move_heads_with(|map, head, _| {
 7106                (movement::next_subword_end(map, head), SelectionGoal::None)
 7107            });
 7108        })
 7109    }
 7110
 7111    pub fn delete_to_next_word_end(&mut self, _: &DeleteToNextWordEnd, cx: &mut ViewContext<Self>) {
 7112        self.transact(cx, |this, cx| {
 7113            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7114                let line_mode = s.line_mode;
 7115                s.move_with(|map, selection| {
 7116                    if selection.is_empty() && !line_mode {
 7117                        let cursor = movement::next_word_end(map, selection.head());
 7118                        selection.set_head(cursor, SelectionGoal::None);
 7119                    }
 7120                });
 7121            });
 7122            this.insert("", cx);
 7123        });
 7124    }
 7125
 7126    pub fn delete_to_next_subword_end(
 7127        &mut self,
 7128        _: &DeleteToNextSubwordEnd,
 7129        cx: &mut ViewContext<Self>,
 7130    ) {
 7131        self.transact(cx, |this, cx| {
 7132            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7133                s.move_with(|map, selection| {
 7134                    if selection.is_empty() {
 7135                        let cursor = movement::next_subword_end(map, selection.head());
 7136                        selection.set_head(cursor, SelectionGoal::None);
 7137                    }
 7138                });
 7139            });
 7140            this.insert("", cx);
 7141        });
 7142    }
 7143
 7144    pub fn move_to_beginning_of_line(
 7145        &mut self,
 7146        action: &MoveToBeginningOfLine,
 7147        cx: &mut ViewContext<Self>,
 7148    ) {
 7149        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7150            s.move_cursors_with(|map, head, _| {
 7151                (
 7152                    movement::indented_line_beginning(map, head, action.stop_at_soft_wraps),
 7153                    SelectionGoal::None,
 7154                )
 7155            });
 7156        })
 7157    }
 7158
 7159    pub fn select_to_beginning_of_line(
 7160        &mut self,
 7161        action: &SelectToBeginningOfLine,
 7162        cx: &mut ViewContext<Self>,
 7163    ) {
 7164        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7165            s.move_heads_with(|map, head, _| {
 7166                (
 7167                    movement::indented_line_beginning(map, head, action.stop_at_soft_wraps),
 7168                    SelectionGoal::None,
 7169                )
 7170            });
 7171        });
 7172    }
 7173
 7174    pub fn delete_to_beginning_of_line(
 7175        &mut self,
 7176        _: &DeleteToBeginningOfLine,
 7177        cx: &mut ViewContext<Self>,
 7178    ) {
 7179        self.transact(cx, |this, cx| {
 7180            this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7181                s.move_with(|_, selection| {
 7182                    selection.reversed = true;
 7183                });
 7184            });
 7185
 7186            this.select_to_beginning_of_line(
 7187                &SelectToBeginningOfLine {
 7188                    stop_at_soft_wraps: false,
 7189                },
 7190                cx,
 7191            );
 7192            this.backspace(&Backspace, cx);
 7193        });
 7194    }
 7195
 7196    pub fn move_to_end_of_line(&mut self, action: &MoveToEndOfLine, cx: &mut ViewContext<Self>) {
 7197        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7198            s.move_cursors_with(|map, head, _| {
 7199                (
 7200                    movement::line_end(map, head, action.stop_at_soft_wraps),
 7201                    SelectionGoal::None,
 7202                )
 7203            });
 7204        })
 7205    }
 7206
 7207    pub fn select_to_end_of_line(
 7208        &mut self,
 7209        action: &SelectToEndOfLine,
 7210        cx: &mut ViewContext<Self>,
 7211    ) {
 7212        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7213            s.move_heads_with(|map, head, _| {
 7214                (
 7215                    movement::line_end(map, head, action.stop_at_soft_wraps),
 7216                    SelectionGoal::None,
 7217                )
 7218            });
 7219        })
 7220    }
 7221
 7222    pub fn delete_to_end_of_line(&mut self, _: &DeleteToEndOfLine, cx: &mut ViewContext<Self>) {
 7223        self.transact(cx, |this, cx| {
 7224            this.select_to_end_of_line(
 7225                &SelectToEndOfLine {
 7226                    stop_at_soft_wraps: false,
 7227                },
 7228                cx,
 7229            );
 7230            this.delete(&Delete, cx);
 7231        });
 7232    }
 7233
 7234    pub fn cut_to_end_of_line(&mut self, _: &CutToEndOfLine, cx: &mut ViewContext<Self>) {
 7235        self.transact(cx, |this, cx| {
 7236            this.select_to_end_of_line(
 7237                &SelectToEndOfLine {
 7238                    stop_at_soft_wraps: false,
 7239                },
 7240                cx,
 7241            );
 7242            this.cut(&Cut, cx);
 7243        });
 7244    }
 7245
 7246    pub fn move_to_start_of_paragraph(
 7247        &mut self,
 7248        _: &MoveToStartOfParagraph,
 7249        cx: &mut ViewContext<Self>,
 7250    ) {
 7251        if matches!(self.mode, EditorMode::SingleLine) {
 7252            cx.propagate();
 7253            return;
 7254        }
 7255
 7256        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7257            s.move_with(|map, selection| {
 7258                selection.collapse_to(
 7259                    movement::start_of_paragraph(map, selection.head(), 1),
 7260                    SelectionGoal::None,
 7261                )
 7262            });
 7263        })
 7264    }
 7265
 7266    pub fn move_to_end_of_paragraph(
 7267        &mut self,
 7268        _: &MoveToEndOfParagraph,
 7269        cx: &mut ViewContext<Self>,
 7270    ) {
 7271        if matches!(self.mode, EditorMode::SingleLine) {
 7272            cx.propagate();
 7273            return;
 7274        }
 7275
 7276        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7277            s.move_with(|map, selection| {
 7278                selection.collapse_to(
 7279                    movement::end_of_paragraph(map, selection.head(), 1),
 7280                    SelectionGoal::None,
 7281                )
 7282            });
 7283        })
 7284    }
 7285
 7286    pub fn select_to_start_of_paragraph(
 7287        &mut self,
 7288        _: &SelectToStartOfParagraph,
 7289        cx: &mut ViewContext<Self>,
 7290    ) {
 7291        if matches!(self.mode, EditorMode::SingleLine) {
 7292            cx.propagate();
 7293            return;
 7294        }
 7295
 7296        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7297            s.move_heads_with(|map, head, _| {
 7298                (
 7299                    movement::start_of_paragraph(map, head, 1),
 7300                    SelectionGoal::None,
 7301                )
 7302            });
 7303        })
 7304    }
 7305
 7306    pub fn select_to_end_of_paragraph(
 7307        &mut self,
 7308        _: &SelectToEndOfParagraph,
 7309        cx: &mut ViewContext<Self>,
 7310    ) {
 7311        if matches!(self.mode, EditorMode::SingleLine) {
 7312            cx.propagate();
 7313            return;
 7314        }
 7315
 7316        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7317            s.move_heads_with(|map, head, _| {
 7318                (
 7319                    movement::end_of_paragraph(map, head, 1),
 7320                    SelectionGoal::None,
 7321                )
 7322            });
 7323        })
 7324    }
 7325
 7326    pub fn move_to_beginning(&mut self, _: &MoveToBeginning, cx: &mut ViewContext<Self>) {
 7327        if matches!(self.mode, EditorMode::SingleLine) {
 7328            cx.propagate();
 7329            return;
 7330        }
 7331
 7332        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7333            s.select_ranges(vec![0..0]);
 7334        });
 7335    }
 7336
 7337    pub fn select_to_beginning(&mut self, _: &SelectToBeginning, cx: &mut ViewContext<Self>) {
 7338        let mut selection = self.selections.last::<Point>(cx);
 7339        selection.set_head(Point::zero(), SelectionGoal::None);
 7340
 7341        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7342            s.select(vec![selection]);
 7343        });
 7344    }
 7345
 7346    pub fn move_to_end(&mut self, _: &MoveToEnd, cx: &mut ViewContext<Self>) {
 7347        if matches!(self.mode, EditorMode::SingleLine) {
 7348            cx.propagate();
 7349            return;
 7350        }
 7351
 7352        let cursor = self.buffer.read(cx).read(cx).len();
 7353        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7354            s.select_ranges(vec![cursor..cursor])
 7355        });
 7356    }
 7357
 7358    pub fn set_nav_history(&mut self, nav_history: Option<ItemNavHistory>) {
 7359        self.nav_history = nav_history;
 7360    }
 7361
 7362    pub fn nav_history(&self) -> Option<&ItemNavHistory> {
 7363        self.nav_history.as_ref()
 7364    }
 7365
 7366    fn push_to_nav_history(
 7367        &mut self,
 7368        cursor_anchor: Anchor,
 7369        new_position: Option<Point>,
 7370        cx: &mut ViewContext<Self>,
 7371    ) {
 7372        if let Some(nav_history) = self.nav_history.as_mut() {
 7373            let buffer = self.buffer.read(cx).read(cx);
 7374            let cursor_position = cursor_anchor.to_point(&buffer);
 7375            let scroll_state = self.scroll_manager.anchor();
 7376            let scroll_top_row = scroll_state.top_row(&buffer);
 7377            drop(buffer);
 7378
 7379            if let Some(new_position) = new_position {
 7380                let row_delta = (new_position.row as i64 - cursor_position.row as i64).abs();
 7381                if row_delta < MIN_NAVIGATION_HISTORY_ROW_DELTA {
 7382                    return;
 7383                }
 7384            }
 7385
 7386            nav_history.push(
 7387                Some(NavigationData {
 7388                    cursor_anchor,
 7389                    cursor_position,
 7390                    scroll_anchor: scroll_state,
 7391                    scroll_top_row,
 7392                }),
 7393                cx,
 7394            );
 7395        }
 7396    }
 7397
 7398    pub fn select_to_end(&mut self, _: &SelectToEnd, cx: &mut ViewContext<Self>) {
 7399        let buffer = self.buffer.read(cx).snapshot(cx);
 7400        let mut selection = self.selections.first::<usize>(cx);
 7401        selection.set_head(buffer.len(), SelectionGoal::None);
 7402        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7403            s.select(vec![selection]);
 7404        });
 7405    }
 7406
 7407    pub fn select_all(&mut self, _: &SelectAll, cx: &mut ViewContext<Self>) {
 7408        let end = self.buffer.read(cx).read(cx).len();
 7409        self.change_selections(None, cx, |s| {
 7410            s.select_ranges(vec![0..end]);
 7411        });
 7412    }
 7413
 7414    pub fn select_line(&mut self, _: &SelectLine, cx: &mut ViewContext<Self>) {
 7415        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 7416        let mut selections = self.selections.all::<Point>(cx);
 7417        let max_point = display_map.buffer_snapshot.max_point();
 7418        for selection in &mut selections {
 7419            let rows = selection.spanned_rows(true, &display_map);
 7420            selection.start = Point::new(rows.start.0, 0);
 7421            selection.end = cmp::min(max_point, Point::new(rows.end.0, 0));
 7422            selection.reversed = false;
 7423        }
 7424        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7425            s.select(selections);
 7426        });
 7427    }
 7428
 7429    pub fn split_selection_into_lines(
 7430        &mut self,
 7431        _: &SplitSelectionIntoLines,
 7432        cx: &mut ViewContext<Self>,
 7433    ) {
 7434        let mut to_unfold = Vec::new();
 7435        let mut new_selection_ranges = Vec::new();
 7436        {
 7437            let selections = self.selections.all::<Point>(cx);
 7438            let buffer = self.buffer.read(cx).read(cx);
 7439            for selection in selections {
 7440                for row in selection.start.row..selection.end.row {
 7441                    let cursor = Point::new(row, buffer.line_len(MultiBufferRow(row)));
 7442                    new_selection_ranges.push(cursor..cursor);
 7443                }
 7444                new_selection_ranges.push(selection.end..selection.end);
 7445                to_unfold.push(selection.start..selection.end);
 7446            }
 7447        }
 7448        self.unfold_ranges(to_unfold, true, true, cx);
 7449        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7450            s.select_ranges(new_selection_ranges);
 7451        });
 7452    }
 7453
 7454    pub fn add_selection_above(&mut self, _: &AddSelectionAbove, cx: &mut ViewContext<Self>) {
 7455        self.add_selection(true, cx);
 7456    }
 7457
 7458    pub fn add_selection_below(&mut self, _: &AddSelectionBelow, cx: &mut ViewContext<Self>) {
 7459        self.add_selection(false, cx);
 7460    }
 7461
 7462    fn add_selection(&mut self, above: bool, cx: &mut ViewContext<Self>) {
 7463        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 7464        let mut selections = self.selections.all::<Point>(cx);
 7465        let text_layout_details = self.text_layout_details(cx);
 7466        let mut state = self.add_selections_state.take().unwrap_or_else(|| {
 7467            let oldest_selection = selections.iter().min_by_key(|s| s.id).unwrap().clone();
 7468            let range = oldest_selection.display_range(&display_map).sorted();
 7469
 7470            let start_x = display_map.x_for_display_point(range.start, &text_layout_details);
 7471            let end_x = display_map.x_for_display_point(range.end, &text_layout_details);
 7472            let positions = start_x.min(end_x)..start_x.max(end_x);
 7473
 7474            selections.clear();
 7475            let mut stack = Vec::new();
 7476            for row in range.start.row().0..=range.end.row().0 {
 7477                if let Some(selection) = self.selections.build_columnar_selection(
 7478                    &display_map,
 7479                    DisplayRow(row),
 7480                    &positions,
 7481                    oldest_selection.reversed,
 7482                    &text_layout_details,
 7483                ) {
 7484                    stack.push(selection.id);
 7485                    selections.push(selection);
 7486                }
 7487            }
 7488
 7489            if above {
 7490                stack.reverse();
 7491            }
 7492
 7493            AddSelectionsState { above, stack }
 7494        });
 7495
 7496        let last_added_selection = *state.stack.last().unwrap();
 7497        let mut new_selections = Vec::new();
 7498        if above == state.above {
 7499            let end_row = if above {
 7500                DisplayRow(0)
 7501            } else {
 7502                display_map.max_point().row()
 7503            };
 7504
 7505            'outer: for selection in selections {
 7506                if selection.id == last_added_selection {
 7507                    let range = selection.display_range(&display_map).sorted();
 7508                    debug_assert_eq!(range.start.row(), range.end.row());
 7509                    let mut row = range.start.row();
 7510                    let positions =
 7511                        if let SelectionGoal::HorizontalRange { start, end } = selection.goal {
 7512                            px(start)..px(end)
 7513                        } else {
 7514                            let start_x =
 7515                                display_map.x_for_display_point(range.start, &text_layout_details);
 7516                            let end_x =
 7517                                display_map.x_for_display_point(range.end, &text_layout_details);
 7518                            start_x.min(end_x)..start_x.max(end_x)
 7519                        };
 7520
 7521                    while row != end_row {
 7522                        if above {
 7523                            row.0 -= 1;
 7524                        } else {
 7525                            row.0 += 1;
 7526                        }
 7527
 7528                        if let Some(new_selection) = self.selections.build_columnar_selection(
 7529                            &display_map,
 7530                            row,
 7531                            &positions,
 7532                            selection.reversed,
 7533                            &text_layout_details,
 7534                        ) {
 7535                            state.stack.push(new_selection.id);
 7536                            if above {
 7537                                new_selections.push(new_selection);
 7538                                new_selections.push(selection);
 7539                            } else {
 7540                                new_selections.push(selection);
 7541                                new_selections.push(new_selection);
 7542                            }
 7543
 7544                            continue 'outer;
 7545                        }
 7546                    }
 7547                }
 7548
 7549                new_selections.push(selection);
 7550            }
 7551        } else {
 7552            new_selections = selections;
 7553            new_selections.retain(|s| s.id != last_added_selection);
 7554            state.stack.pop();
 7555        }
 7556
 7557        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 7558            s.select(new_selections);
 7559        });
 7560        if state.stack.len() > 1 {
 7561            self.add_selections_state = Some(state);
 7562        }
 7563    }
 7564
 7565    pub fn select_next_match_internal(
 7566        &mut self,
 7567        display_map: &DisplaySnapshot,
 7568        replace_newest: bool,
 7569        autoscroll: Option<Autoscroll>,
 7570        cx: &mut ViewContext<Self>,
 7571    ) -> Result<()> {
 7572        fn select_next_match_ranges(
 7573            this: &mut Editor,
 7574            range: Range<usize>,
 7575            replace_newest: bool,
 7576            auto_scroll: Option<Autoscroll>,
 7577            cx: &mut ViewContext<Editor>,
 7578        ) {
 7579            this.unfold_ranges([range.clone()], false, true, cx);
 7580            this.change_selections(auto_scroll, cx, |s| {
 7581                if replace_newest {
 7582                    s.delete(s.newest_anchor().id);
 7583                }
 7584                s.insert_range(range.clone());
 7585            });
 7586        }
 7587
 7588        let buffer = &display_map.buffer_snapshot;
 7589        let mut selections = self.selections.all::<usize>(cx);
 7590        if let Some(mut select_next_state) = self.select_next_state.take() {
 7591            let query = &select_next_state.query;
 7592            if !select_next_state.done {
 7593                let first_selection = selections.iter().min_by_key(|s| s.id).unwrap();
 7594                let last_selection = selections.iter().max_by_key(|s| s.id).unwrap();
 7595                let mut next_selected_range = None;
 7596
 7597                let bytes_after_last_selection =
 7598                    buffer.bytes_in_range(last_selection.end..buffer.len());
 7599                let bytes_before_first_selection = buffer.bytes_in_range(0..first_selection.start);
 7600                let query_matches = query
 7601                    .stream_find_iter(bytes_after_last_selection)
 7602                    .map(|result| (last_selection.end, result))
 7603                    .chain(
 7604                        query
 7605                            .stream_find_iter(bytes_before_first_selection)
 7606                            .map(|result| (0, result)),
 7607                    );
 7608
 7609                for (start_offset, query_match) in query_matches {
 7610                    let query_match = query_match.unwrap(); // can only fail due to I/O
 7611                    let offset_range =
 7612                        start_offset + query_match.start()..start_offset + query_match.end();
 7613                    let display_range = offset_range.start.to_display_point(&display_map)
 7614                        ..offset_range.end.to_display_point(&display_map);
 7615
 7616                    if !select_next_state.wordwise
 7617                        || (!movement::is_inside_word(&display_map, display_range.start)
 7618                            && !movement::is_inside_word(&display_map, display_range.end))
 7619                    {
 7620                        // TODO: This is n^2, because we might check all the selections
 7621                        if !selections
 7622                            .iter()
 7623                            .any(|selection| selection.range().overlaps(&offset_range))
 7624                        {
 7625                            next_selected_range = Some(offset_range);
 7626                            break;
 7627                        }
 7628                    }
 7629                }
 7630
 7631                if let Some(next_selected_range) = next_selected_range {
 7632                    select_next_match_ranges(
 7633                        self,
 7634                        next_selected_range,
 7635                        replace_newest,
 7636                        autoscroll,
 7637                        cx,
 7638                    );
 7639                } else {
 7640                    select_next_state.done = true;
 7641                }
 7642            }
 7643
 7644            self.select_next_state = Some(select_next_state);
 7645        } else {
 7646            let mut only_carets = true;
 7647            let mut same_text_selected = true;
 7648            let mut selected_text = None;
 7649
 7650            let mut selections_iter = selections.iter().peekable();
 7651            while let Some(selection) = selections_iter.next() {
 7652                if selection.start != selection.end {
 7653                    only_carets = false;
 7654                }
 7655
 7656                if same_text_selected {
 7657                    if selected_text.is_none() {
 7658                        selected_text =
 7659                            Some(buffer.text_for_range(selection.range()).collect::<String>());
 7660                    }
 7661
 7662                    if let Some(next_selection) = selections_iter.peek() {
 7663                        if next_selection.range().len() == selection.range().len() {
 7664                            let next_selected_text = buffer
 7665                                .text_for_range(next_selection.range())
 7666                                .collect::<String>();
 7667                            if Some(next_selected_text) != selected_text {
 7668                                same_text_selected = false;
 7669                                selected_text = None;
 7670                            }
 7671                        } else {
 7672                            same_text_selected = false;
 7673                            selected_text = None;
 7674                        }
 7675                    }
 7676                }
 7677            }
 7678
 7679            if only_carets {
 7680                for selection in &mut selections {
 7681                    let word_range = movement::surrounding_word(
 7682                        &display_map,
 7683                        selection.start.to_display_point(&display_map),
 7684                    );
 7685                    selection.start = word_range.start.to_offset(&display_map, Bias::Left);
 7686                    selection.end = word_range.end.to_offset(&display_map, Bias::Left);
 7687                    selection.goal = SelectionGoal::None;
 7688                    selection.reversed = false;
 7689                    select_next_match_ranges(
 7690                        self,
 7691                        selection.start..selection.end,
 7692                        replace_newest,
 7693                        autoscroll,
 7694                        cx,
 7695                    );
 7696                }
 7697
 7698                if selections.len() == 1 {
 7699                    let selection = selections
 7700                        .last()
 7701                        .expect("ensured that there's only one selection");
 7702                    let query = buffer
 7703                        .text_for_range(selection.start..selection.end)
 7704                        .collect::<String>();
 7705                    let is_empty = query.is_empty();
 7706                    let select_state = SelectNextState {
 7707                        query: AhoCorasick::new(&[query])?,
 7708                        wordwise: true,
 7709                        done: is_empty,
 7710                    };
 7711                    self.select_next_state = Some(select_state);
 7712                } else {
 7713                    self.select_next_state = None;
 7714                }
 7715            } else if let Some(selected_text) = selected_text {
 7716                self.select_next_state = Some(SelectNextState {
 7717                    query: AhoCorasick::new(&[selected_text])?,
 7718                    wordwise: false,
 7719                    done: false,
 7720                });
 7721                self.select_next_match_internal(display_map, replace_newest, autoscroll, cx)?;
 7722            }
 7723        }
 7724        Ok(())
 7725    }
 7726
 7727    pub fn select_all_matches(
 7728        &mut self,
 7729        _action: &SelectAllMatches,
 7730        cx: &mut ViewContext<Self>,
 7731    ) -> Result<()> {
 7732        self.push_to_selection_history();
 7733        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 7734
 7735        self.select_next_match_internal(&display_map, false, None, cx)?;
 7736        let Some(select_next_state) = self.select_next_state.as_mut() else {
 7737            return Ok(());
 7738        };
 7739        if select_next_state.done {
 7740            return Ok(());
 7741        }
 7742
 7743        let mut new_selections = self.selections.all::<usize>(cx);
 7744
 7745        let buffer = &display_map.buffer_snapshot;
 7746        let query_matches = select_next_state
 7747            .query
 7748            .stream_find_iter(buffer.bytes_in_range(0..buffer.len()));
 7749
 7750        for query_match in query_matches {
 7751            let query_match = query_match.unwrap(); // can only fail due to I/O
 7752            let offset_range = query_match.start()..query_match.end();
 7753            let display_range = offset_range.start.to_display_point(&display_map)
 7754                ..offset_range.end.to_display_point(&display_map);
 7755
 7756            if !select_next_state.wordwise
 7757                || (!movement::is_inside_word(&display_map, display_range.start)
 7758                    && !movement::is_inside_word(&display_map, display_range.end))
 7759            {
 7760                self.selections.change_with(cx, |selections| {
 7761                    new_selections.push(Selection {
 7762                        id: selections.new_selection_id(),
 7763                        start: offset_range.start,
 7764                        end: offset_range.end,
 7765                        reversed: false,
 7766                        goal: SelectionGoal::None,
 7767                    });
 7768                });
 7769            }
 7770        }
 7771
 7772        new_selections.sort_by_key(|selection| selection.start);
 7773        let mut ix = 0;
 7774        while ix + 1 < new_selections.len() {
 7775            let current_selection = &new_selections[ix];
 7776            let next_selection = &new_selections[ix + 1];
 7777            if current_selection.range().overlaps(&next_selection.range()) {
 7778                if current_selection.id < next_selection.id {
 7779                    new_selections.remove(ix + 1);
 7780                } else {
 7781                    new_selections.remove(ix);
 7782                }
 7783            } else {
 7784                ix += 1;
 7785            }
 7786        }
 7787
 7788        select_next_state.done = true;
 7789        self.unfold_ranges(
 7790            new_selections.iter().map(|selection| selection.range()),
 7791            false,
 7792            false,
 7793            cx,
 7794        );
 7795        self.change_selections(Some(Autoscroll::fit()), cx, |selections| {
 7796            selections.select(new_selections)
 7797        });
 7798
 7799        Ok(())
 7800    }
 7801
 7802    pub fn select_next(&mut self, action: &SelectNext, cx: &mut ViewContext<Self>) -> Result<()> {
 7803        self.push_to_selection_history();
 7804        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 7805        self.select_next_match_internal(
 7806            &display_map,
 7807            action.replace_newest,
 7808            Some(Autoscroll::newest()),
 7809            cx,
 7810        )?;
 7811        Ok(())
 7812    }
 7813
 7814    pub fn select_previous(
 7815        &mut self,
 7816        action: &SelectPrevious,
 7817        cx: &mut ViewContext<Self>,
 7818    ) -> Result<()> {
 7819        self.push_to_selection_history();
 7820        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 7821        let buffer = &display_map.buffer_snapshot;
 7822        let mut selections = self.selections.all::<usize>(cx);
 7823        if let Some(mut select_prev_state) = self.select_prev_state.take() {
 7824            let query = &select_prev_state.query;
 7825            if !select_prev_state.done {
 7826                let first_selection = selections.iter().min_by_key(|s| s.id).unwrap();
 7827                let last_selection = selections.iter().max_by_key(|s| s.id).unwrap();
 7828                let mut next_selected_range = None;
 7829                // When we're iterating matches backwards, the oldest match will actually be the furthest one in the buffer.
 7830                let bytes_before_last_selection =
 7831                    buffer.reversed_bytes_in_range(0..last_selection.start);
 7832                let bytes_after_first_selection =
 7833                    buffer.reversed_bytes_in_range(first_selection.end..buffer.len());
 7834                let query_matches = query
 7835                    .stream_find_iter(bytes_before_last_selection)
 7836                    .map(|result| (last_selection.start, result))
 7837                    .chain(
 7838                        query
 7839                            .stream_find_iter(bytes_after_first_selection)
 7840                            .map(|result| (buffer.len(), result)),
 7841                    );
 7842                for (end_offset, query_match) in query_matches {
 7843                    let query_match = query_match.unwrap(); // can only fail due to I/O
 7844                    let offset_range =
 7845                        end_offset - query_match.end()..end_offset - query_match.start();
 7846                    let display_range = offset_range.start.to_display_point(&display_map)
 7847                        ..offset_range.end.to_display_point(&display_map);
 7848
 7849                    if !select_prev_state.wordwise
 7850                        || (!movement::is_inside_word(&display_map, display_range.start)
 7851                            && !movement::is_inside_word(&display_map, display_range.end))
 7852                    {
 7853                        next_selected_range = Some(offset_range);
 7854                        break;
 7855                    }
 7856                }
 7857
 7858                if let Some(next_selected_range) = next_selected_range {
 7859                    self.unfold_ranges([next_selected_range.clone()], false, true, cx);
 7860                    self.change_selections(Some(Autoscroll::newest()), cx, |s| {
 7861                        if action.replace_newest {
 7862                            s.delete(s.newest_anchor().id);
 7863                        }
 7864                        s.insert_range(next_selected_range);
 7865                    });
 7866                } else {
 7867                    select_prev_state.done = true;
 7868                }
 7869            }
 7870
 7871            self.select_prev_state = Some(select_prev_state);
 7872        } else {
 7873            let mut only_carets = true;
 7874            let mut same_text_selected = true;
 7875            let mut selected_text = None;
 7876
 7877            let mut selections_iter = selections.iter().peekable();
 7878            while let Some(selection) = selections_iter.next() {
 7879                if selection.start != selection.end {
 7880                    only_carets = false;
 7881                }
 7882
 7883                if same_text_selected {
 7884                    if selected_text.is_none() {
 7885                        selected_text =
 7886                            Some(buffer.text_for_range(selection.range()).collect::<String>());
 7887                    }
 7888
 7889                    if let Some(next_selection) = selections_iter.peek() {
 7890                        if next_selection.range().len() == selection.range().len() {
 7891                            let next_selected_text = buffer
 7892                                .text_for_range(next_selection.range())
 7893                                .collect::<String>();
 7894                            if Some(next_selected_text) != selected_text {
 7895                                same_text_selected = false;
 7896                                selected_text = None;
 7897                            }
 7898                        } else {
 7899                            same_text_selected = false;
 7900                            selected_text = None;
 7901                        }
 7902                    }
 7903                }
 7904            }
 7905
 7906            if only_carets {
 7907                for selection in &mut selections {
 7908                    let word_range = movement::surrounding_word(
 7909                        &display_map,
 7910                        selection.start.to_display_point(&display_map),
 7911                    );
 7912                    selection.start = word_range.start.to_offset(&display_map, Bias::Left);
 7913                    selection.end = word_range.end.to_offset(&display_map, Bias::Left);
 7914                    selection.goal = SelectionGoal::None;
 7915                    selection.reversed = false;
 7916                }
 7917                if selections.len() == 1 {
 7918                    let selection = selections
 7919                        .last()
 7920                        .expect("ensured that there's only one selection");
 7921                    let query = buffer
 7922                        .text_for_range(selection.start..selection.end)
 7923                        .collect::<String>();
 7924                    let is_empty = query.is_empty();
 7925                    let select_state = SelectNextState {
 7926                        query: AhoCorasick::new(&[query.chars().rev().collect::<String>()])?,
 7927                        wordwise: true,
 7928                        done: is_empty,
 7929                    };
 7930                    self.select_prev_state = Some(select_state);
 7931                } else {
 7932                    self.select_prev_state = None;
 7933                }
 7934
 7935                self.unfold_ranges(
 7936                    selections.iter().map(|s| s.range()).collect::<Vec<_>>(),
 7937                    false,
 7938                    true,
 7939                    cx,
 7940                );
 7941                self.change_selections(Some(Autoscroll::newest()), cx, |s| {
 7942                    s.select(selections);
 7943                });
 7944            } else if let Some(selected_text) = selected_text {
 7945                self.select_prev_state = Some(SelectNextState {
 7946                    query: AhoCorasick::new(&[selected_text.chars().rev().collect::<String>()])?,
 7947                    wordwise: false,
 7948                    done: false,
 7949                });
 7950                self.select_previous(action, cx)?;
 7951            }
 7952        }
 7953        Ok(())
 7954    }
 7955
 7956    pub fn toggle_comments(&mut self, action: &ToggleComments, cx: &mut ViewContext<Self>) {
 7957        let text_layout_details = &self.text_layout_details(cx);
 7958        self.transact(cx, |this, cx| {
 7959            let mut selections = this.selections.all::<MultiBufferPoint>(cx);
 7960            let mut edits = Vec::new();
 7961            let mut selection_edit_ranges = Vec::new();
 7962            let mut last_toggled_row = None;
 7963            let snapshot = this.buffer.read(cx).read(cx);
 7964            let empty_str: Arc<str> = "".into();
 7965            let mut suffixes_inserted = Vec::new();
 7966
 7967            fn comment_prefix_range(
 7968                snapshot: &MultiBufferSnapshot,
 7969                row: MultiBufferRow,
 7970                comment_prefix: &str,
 7971                comment_prefix_whitespace: &str,
 7972            ) -> Range<Point> {
 7973                let start = Point::new(row.0, snapshot.indent_size_for_line(row).len);
 7974
 7975                let mut line_bytes = snapshot
 7976                    .bytes_in_range(start..snapshot.max_point())
 7977                    .flatten()
 7978                    .copied();
 7979
 7980                // If this line currently begins with the line comment prefix, then record
 7981                // the range containing the prefix.
 7982                if line_bytes
 7983                    .by_ref()
 7984                    .take(comment_prefix.len())
 7985                    .eq(comment_prefix.bytes())
 7986                {
 7987                    // Include any whitespace that matches the comment prefix.
 7988                    let matching_whitespace_len = line_bytes
 7989                        .zip(comment_prefix_whitespace.bytes())
 7990                        .take_while(|(a, b)| a == b)
 7991                        .count() as u32;
 7992                    let end = Point::new(
 7993                        start.row,
 7994                        start.column + comment_prefix.len() as u32 + matching_whitespace_len,
 7995                    );
 7996                    start..end
 7997                } else {
 7998                    start..start
 7999                }
 8000            }
 8001
 8002            fn comment_suffix_range(
 8003                snapshot: &MultiBufferSnapshot,
 8004                row: MultiBufferRow,
 8005                comment_suffix: &str,
 8006                comment_suffix_has_leading_space: bool,
 8007            ) -> Range<Point> {
 8008                let end = Point::new(row.0, snapshot.line_len(row));
 8009                let suffix_start_column = end.column.saturating_sub(comment_suffix.len() as u32);
 8010
 8011                let mut line_end_bytes = snapshot
 8012                    .bytes_in_range(Point::new(end.row, suffix_start_column.saturating_sub(1))..end)
 8013                    .flatten()
 8014                    .copied();
 8015
 8016                let leading_space_len = if suffix_start_column > 0
 8017                    && line_end_bytes.next() == Some(b' ')
 8018                    && comment_suffix_has_leading_space
 8019                {
 8020                    1
 8021                } else {
 8022                    0
 8023                };
 8024
 8025                // If this line currently begins with the line comment prefix, then record
 8026                // the range containing the prefix.
 8027                if line_end_bytes.by_ref().eq(comment_suffix.bytes()) {
 8028                    let start = Point::new(end.row, suffix_start_column - leading_space_len);
 8029                    start..end
 8030                } else {
 8031                    end..end
 8032                }
 8033            }
 8034
 8035            // TODO: Handle selections that cross excerpts
 8036            for selection in &mut selections {
 8037                let start_column = snapshot
 8038                    .indent_size_for_line(MultiBufferRow(selection.start.row))
 8039                    .len;
 8040                let language = if let Some(language) =
 8041                    snapshot.language_scope_at(Point::new(selection.start.row, start_column))
 8042                {
 8043                    language
 8044                } else {
 8045                    continue;
 8046                };
 8047
 8048                selection_edit_ranges.clear();
 8049
 8050                // If multiple selections contain a given row, avoid processing that
 8051                // row more than once.
 8052                let mut start_row = MultiBufferRow(selection.start.row);
 8053                if last_toggled_row == Some(start_row) {
 8054                    start_row = start_row.next_row();
 8055                }
 8056                let end_row =
 8057                    if selection.end.row > selection.start.row && selection.end.column == 0 {
 8058                        MultiBufferRow(selection.end.row - 1)
 8059                    } else {
 8060                        MultiBufferRow(selection.end.row)
 8061                    };
 8062                last_toggled_row = Some(end_row);
 8063
 8064                if start_row > end_row {
 8065                    continue;
 8066                }
 8067
 8068                // If the language has line comments, toggle those.
 8069                let full_comment_prefixes = language.line_comment_prefixes();
 8070                if !full_comment_prefixes.is_empty() {
 8071                    let first_prefix = full_comment_prefixes
 8072                        .first()
 8073                        .expect("prefixes is non-empty");
 8074                    let prefix_trimmed_lengths = full_comment_prefixes
 8075                        .iter()
 8076                        .map(|p| p.trim_end_matches(' ').len())
 8077                        .collect::<SmallVec<[usize; 4]>>();
 8078
 8079                    let mut all_selection_lines_are_comments = true;
 8080
 8081                    for row in start_row.0..=end_row.0 {
 8082                        let row = MultiBufferRow(row);
 8083                        if start_row < end_row && snapshot.is_line_blank(row) {
 8084                            continue;
 8085                        }
 8086
 8087                        let prefix_range = full_comment_prefixes
 8088                            .iter()
 8089                            .zip(prefix_trimmed_lengths.iter().copied())
 8090                            .map(|(prefix, trimmed_prefix_len)| {
 8091                                comment_prefix_range(
 8092                                    snapshot.deref(),
 8093                                    row,
 8094                                    &prefix[..trimmed_prefix_len],
 8095                                    &prefix[trimmed_prefix_len..],
 8096                                )
 8097                            })
 8098                            .max_by_key(|range| range.end.column - range.start.column)
 8099                            .expect("prefixes is non-empty");
 8100
 8101                        if prefix_range.is_empty() {
 8102                            all_selection_lines_are_comments = false;
 8103                        }
 8104
 8105                        selection_edit_ranges.push(prefix_range);
 8106                    }
 8107
 8108                    if all_selection_lines_are_comments {
 8109                        edits.extend(
 8110                            selection_edit_ranges
 8111                                .iter()
 8112                                .cloned()
 8113                                .map(|range| (range, empty_str.clone())),
 8114                        );
 8115                    } else {
 8116                        let min_column = selection_edit_ranges
 8117                            .iter()
 8118                            .map(|range| range.start.column)
 8119                            .min()
 8120                            .unwrap_or(0);
 8121                        edits.extend(selection_edit_ranges.iter().map(|range| {
 8122                            let position = Point::new(range.start.row, min_column);
 8123                            (position..position, first_prefix.clone())
 8124                        }));
 8125                    }
 8126                } else if let Some((full_comment_prefix, comment_suffix)) =
 8127                    language.block_comment_delimiters()
 8128                {
 8129                    let comment_prefix = full_comment_prefix.trim_end_matches(' ');
 8130                    let comment_prefix_whitespace = &full_comment_prefix[comment_prefix.len()..];
 8131                    let prefix_range = comment_prefix_range(
 8132                        snapshot.deref(),
 8133                        start_row,
 8134                        comment_prefix,
 8135                        comment_prefix_whitespace,
 8136                    );
 8137                    let suffix_range = comment_suffix_range(
 8138                        snapshot.deref(),
 8139                        end_row,
 8140                        comment_suffix.trim_start_matches(' '),
 8141                        comment_suffix.starts_with(' '),
 8142                    );
 8143
 8144                    if prefix_range.is_empty() || suffix_range.is_empty() {
 8145                        edits.push((
 8146                            prefix_range.start..prefix_range.start,
 8147                            full_comment_prefix.clone(),
 8148                        ));
 8149                        edits.push((suffix_range.end..suffix_range.end, comment_suffix.clone()));
 8150                        suffixes_inserted.push((end_row, comment_suffix.len()));
 8151                    } else {
 8152                        edits.push((prefix_range, empty_str.clone()));
 8153                        edits.push((suffix_range, empty_str.clone()));
 8154                    }
 8155                } else {
 8156                    continue;
 8157                }
 8158            }
 8159
 8160            drop(snapshot);
 8161            this.buffer.update(cx, |buffer, cx| {
 8162                buffer.edit(edits, None, cx);
 8163            });
 8164
 8165            // Adjust selections so that they end before any comment suffixes that
 8166            // were inserted.
 8167            let mut suffixes_inserted = suffixes_inserted.into_iter().peekable();
 8168            let mut selections = this.selections.all::<Point>(cx);
 8169            let snapshot = this.buffer.read(cx).read(cx);
 8170            for selection in &mut selections {
 8171                while let Some((row, suffix_len)) = suffixes_inserted.peek().copied() {
 8172                    match row.cmp(&MultiBufferRow(selection.end.row)) {
 8173                        Ordering::Less => {
 8174                            suffixes_inserted.next();
 8175                            continue;
 8176                        }
 8177                        Ordering::Greater => break,
 8178                        Ordering::Equal => {
 8179                            if selection.end.column == snapshot.line_len(row) {
 8180                                if selection.is_empty() {
 8181                                    selection.start.column -= suffix_len as u32;
 8182                                }
 8183                                selection.end.column -= suffix_len as u32;
 8184                            }
 8185                            break;
 8186                        }
 8187                    }
 8188                }
 8189            }
 8190
 8191            drop(snapshot);
 8192            this.change_selections(Some(Autoscroll::fit()), cx, |s| s.select(selections));
 8193
 8194            let selections = this.selections.all::<Point>(cx);
 8195            let selections_on_single_row = selections.windows(2).all(|selections| {
 8196                selections[0].start.row == selections[1].start.row
 8197                    && selections[0].end.row == selections[1].end.row
 8198                    && selections[0].start.row == selections[0].end.row
 8199            });
 8200            let selections_selecting = selections
 8201                .iter()
 8202                .any(|selection| selection.start != selection.end);
 8203            let advance_downwards = action.advance_downwards
 8204                && selections_on_single_row
 8205                && !selections_selecting
 8206                && this.mode != EditorMode::SingleLine;
 8207
 8208            if advance_downwards {
 8209                let snapshot = this.buffer.read(cx).snapshot(cx);
 8210
 8211                this.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8212                    s.move_cursors_with(|display_snapshot, display_point, _| {
 8213                        let mut point = display_point.to_point(display_snapshot);
 8214                        point.row += 1;
 8215                        point = snapshot.clip_point(point, Bias::Left);
 8216                        let display_point = point.to_display_point(display_snapshot);
 8217                        let goal = SelectionGoal::HorizontalPosition(
 8218                            display_snapshot
 8219                                .x_for_display_point(display_point, &text_layout_details)
 8220                                .into(),
 8221                        );
 8222                        (display_point, goal)
 8223                    })
 8224                });
 8225            }
 8226        });
 8227    }
 8228
 8229    pub fn select_enclosing_symbol(
 8230        &mut self,
 8231        _: &SelectEnclosingSymbol,
 8232        cx: &mut ViewContext<Self>,
 8233    ) {
 8234        let buffer = self.buffer.read(cx).snapshot(cx);
 8235        let old_selections = self.selections.all::<usize>(cx).into_boxed_slice();
 8236
 8237        fn update_selection(
 8238            selection: &Selection<usize>,
 8239            buffer_snap: &MultiBufferSnapshot,
 8240        ) -> Option<Selection<usize>> {
 8241            let cursor = selection.head();
 8242            let (_buffer_id, symbols) = buffer_snap.symbols_containing(cursor, None)?;
 8243            for symbol in symbols.iter().rev() {
 8244                let start = symbol.range.start.to_offset(&buffer_snap);
 8245                let end = symbol.range.end.to_offset(&buffer_snap);
 8246                let new_range = start..end;
 8247                if start < selection.start || end > selection.end {
 8248                    return Some(Selection {
 8249                        id: selection.id,
 8250                        start: new_range.start,
 8251                        end: new_range.end,
 8252                        goal: SelectionGoal::None,
 8253                        reversed: selection.reversed,
 8254                    });
 8255                }
 8256            }
 8257            None
 8258        }
 8259
 8260        let mut selected_larger_symbol = false;
 8261        let new_selections = old_selections
 8262            .iter()
 8263            .map(|selection| match update_selection(selection, &buffer) {
 8264                Some(new_selection) => {
 8265                    if new_selection.range() != selection.range() {
 8266                        selected_larger_symbol = true;
 8267                    }
 8268                    new_selection
 8269                }
 8270                None => selection.clone(),
 8271            })
 8272            .collect::<Vec<_>>();
 8273
 8274        if selected_larger_symbol {
 8275            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8276                s.select(new_selections);
 8277            });
 8278        }
 8279    }
 8280
 8281    pub fn select_larger_syntax_node(
 8282        &mut self,
 8283        _: &SelectLargerSyntaxNode,
 8284        cx: &mut ViewContext<Self>,
 8285    ) {
 8286        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 8287        let buffer = self.buffer.read(cx).snapshot(cx);
 8288        let old_selections = self.selections.all::<usize>(cx).into_boxed_slice();
 8289
 8290        let mut stack = mem::take(&mut self.select_larger_syntax_node_stack);
 8291        let mut selected_larger_node = false;
 8292        let new_selections = old_selections
 8293            .iter()
 8294            .map(|selection| {
 8295                let old_range = selection.start..selection.end;
 8296                let mut new_range = old_range.clone();
 8297                while let Some(containing_range) =
 8298                    buffer.range_for_syntax_ancestor(new_range.clone())
 8299                {
 8300                    new_range = containing_range;
 8301                    if !display_map.intersects_fold(new_range.start)
 8302                        && !display_map.intersects_fold(new_range.end)
 8303                    {
 8304                        break;
 8305                    }
 8306                }
 8307
 8308                selected_larger_node |= new_range != old_range;
 8309                Selection {
 8310                    id: selection.id,
 8311                    start: new_range.start,
 8312                    end: new_range.end,
 8313                    goal: SelectionGoal::None,
 8314                    reversed: selection.reversed,
 8315                }
 8316            })
 8317            .collect::<Vec<_>>();
 8318
 8319        if selected_larger_node {
 8320            stack.push(old_selections);
 8321            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8322                s.select(new_selections);
 8323            });
 8324        }
 8325        self.select_larger_syntax_node_stack = stack;
 8326    }
 8327
 8328    pub fn select_smaller_syntax_node(
 8329        &mut self,
 8330        _: &SelectSmallerSyntaxNode,
 8331        cx: &mut ViewContext<Self>,
 8332    ) {
 8333        let mut stack = mem::take(&mut self.select_larger_syntax_node_stack);
 8334        if let Some(selections) = stack.pop() {
 8335            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8336                s.select(selections.to_vec());
 8337            });
 8338        }
 8339        self.select_larger_syntax_node_stack = stack;
 8340    }
 8341
 8342    fn refresh_runnables(&mut self, cx: &mut ViewContext<Self>) -> Task<()> {
 8343        if !EditorSettings::get_global(cx).gutter.runnables {
 8344            self.clear_tasks();
 8345            return Task::ready(());
 8346        }
 8347        let project = self.project.clone();
 8348        cx.spawn(|this, mut cx| async move {
 8349            let Ok(display_snapshot) = this.update(&mut cx, |this, cx| {
 8350                this.display_map.update(cx, |map, cx| map.snapshot(cx))
 8351            }) else {
 8352                return;
 8353            };
 8354
 8355            let Some(project) = project else {
 8356                return;
 8357            };
 8358
 8359            let hide_runnables = project
 8360                .update(&mut cx, |project, cx| {
 8361                    // Do not display any test indicators in non-dev server remote projects.
 8362                    project.is_remote() && project.ssh_connection_string(cx).is_none()
 8363                })
 8364                .unwrap_or(true);
 8365            if hide_runnables {
 8366                return;
 8367            }
 8368            let new_rows =
 8369                cx.background_executor()
 8370                    .spawn({
 8371                        let snapshot = display_snapshot.clone();
 8372                        async move {
 8373                            Self::fetch_runnable_ranges(&snapshot, Anchor::min()..Anchor::max())
 8374                        }
 8375                    })
 8376                    .await;
 8377            let rows = Self::runnable_rows(project, display_snapshot, new_rows, cx.clone());
 8378
 8379            this.update(&mut cx, |this, _| {
 8380                this.clear_tasks();
 8381                for (key, value) in rows {
 8382                    this.insert_tasks(key, value);
 8383                }
 8384            })
 8385            .ok();
 8386        })
 8387    }
 8388    fn fetch_runnable_ranges(
 8389        snapshot: &DisplaySnapshot,
 8390        range: Range<Anchor>,
 8391    ) -> Vec<language::RunnableRange> {
 8392        snapshot.buffer_snapshot.runnable_ranges(range).collect()
 8393    }
 8394
 8395    fn runnable_rows(
 8396        project: Model<Project>,
 8397        snapshot: DisplaySnapshot,
 8398        runnable_ranges: Vec<RunnableRange>,
 8399        mut cx: AsyncWindowContext,
 8400    ) -> Vec<((BufferId, u32), RunnableTasks)> {
 8401        runnable_ranges
 8402            .into_iter()
 8403            .filter_map(|mut runnable| {
 8404                let tasks = cx
 8405                    .update(|cx| Self::templates_with_tags(&project, &mut runnable.runnable, cx))
 8406                    .ok()?;
 8407                if tasks.is_empty() {
 8408                    return None;
 8409                }
 8410
 8411                let point = runnable.run_range.start.to_point(&snapshot.buffer_snapshot);
 8412
 8413                let row = snapshot
 8414                    .buffer_snapshot
 8415                    .buffer_line_for_row(MultiBufferRow(point.row))?
 8416                    .1
 8417                    .start
 8418                    .row;
 8419
 8420                let context_range =
 8421                    BufferOffset(runnable.full_range.start)..BufferOffset(runnable.full_range.end);
 8422                Some((
 8423                    (runnable.buffer_id, row),
 8424                    RunnableTasks {
 8425                        templates: tasks,
 8426                        offset: MultiBufferOffset(runnable.run_range.start),
 8427                        context_range,
 8428                        column: point.column,
 8429                        extra_variables: runnable.extra_captures,
 8430                    },
 8431                ))
 8432            })
 8433            .collect()
 8434    }
 8435
 8436    fn templates_with_tags(
 8437        project: &Model<Project>,
 8438        runnable: &mut Runnable,
 8439        cx: &WindowContext<'_>,
 8440    ) -> Vec<(TaskSourceKind, TaskTemplate)> {
 8441        let (inventory, worktree_id) = project.read_with(cx, |project, cx| {
 8442            let worktree_id = project
 8443                .buffer_for_id(runnable.buffer)
 8444                .and_then(|buffer| buffer.read(cx).file())
 8445                .map(|file| WorktreeId::from_usize(file.worktree_id()));
 8446
 8447            (project.task_inventory().clone(), worktree_id)
 8448        });
 8449
 8450        let inventory = inventory.read(cx);
 8451        let tags = mem::take(&mut runnable.tags);
 8452        let mut tags: Vec<_> = tags
 8453            .into_iter()
 8454            .flat_map(|tag| {
 8455                let tag = tag.0.clone();
 8456                inventory
 8457                    .list_tasks(Some(runnable.language.clone()), worktree_id)
 8458                    .into_iter()
 8459                    .filter(move |(_, template)| {
 8460                        template.tags.iter().any(|source_tag| source_tag == &tag)
 8461                    })
 8462            })
 8463            .sorted_by_key(|(kind, _)| kind.to_owned())
 8464            .collect();
 8465        if let Some((leading_tag_source, _)) = tags.first() {
 8466            // Strongest source wins; if we have worktree tag binding, prefer that to
 8467            // global and language bindings;
 8468            // if we have a global binding, prefer that to language binding.
 8469            let first_mismatch = tags
 8470                .iter()
 8471                .position(|(tag_source, _)| tag_source != leading_tag_source);
 8472            if let Some(index) = first_mismatch {
 8473                tags.truncate(index);
 8474            }
 8475        }
 8476
 8477        tags
 8478    }
 8479
 8480    pub fn move_to_enclosing_bracket(
 8481        &mut self,
 8482        _: &MoveToEnclosingBracket,
 8483        cx: &mut ViewContext<Self>,
 8484    ) {
 8485        self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8486            s.move_offsets_with(|snapshot, selection| {
 8487                let Some(enclosing_bracket_ranges) =
 8488                    snapshot.enclosing_bracket_ranges(selection.start..selection.end)
 8489                else {
 8490                    return;
 8491                };
 8492
 8493                let mut best_length = usize::MAX;
 8494                let mut best_inside = false;
 8495                let mut best_in_bracket_range = false;
 8496                let mut best_destination = None;
 8497                for (open, close) in enclosing_bracket_ranges {
 8498                    let close = close.to_inclusive();
 8499                    let length = close.end() - open.start;
 8500                    let inside = selection.start >= open.end && selection.end <= *close.start();
 8501                    let in_bracket_range = open.to_inclusive().contains(&selection.head())
 8502                        || close.contains(&selection.head());
 8503
 8504                    // If best is next to a bracket and current isn't, skip
 8505                    if !in_bracket_range && best_in_bracket_range {
 8506                        continue;
 8507                    }
 8508
 8509                    // Prefer smaller lengths unless best is inside and current isn't
 8510                    if length > best_length && (best_inside || !inside) {
 8511                        continue;
 8512                    }
 8513
 8514                    best_length = length;
 8515                    best_inside = inside;
 8516                    best_in_bracket_range = in_bracket_range;
 8517                    best_destination = Some(
 8518                        if close.contains(&selection.start) && close.contains(&selection.end) {
 8519                            if inside {
 8520                                open.end
 8521                            } else {
 8522                                open.start
 8523                            }
 8524                        } else {
 8525                            if inside {
 8526                                *close.start()
 8527                            } else {
 8528                                *close.end()
 8529                            }
 8530                        },
 8531                    );
 8532                }
 8533
 8534                if let Some(destination) = best_destination {
 8535                    selection.collapse_to(destination, SelectionGoal::None);
 8536                }
 8537            })
 8538        });
 8539    }
 8540
 8541    pub fn undo_selection(&mut self, _: &UndoSelection, cx: &mut ViewContext<Self>) {
 8542        self.end_selection(cx);
 8543        self.selection_history.mode = SelectionHistoryMode::Undoing;
 8544        if let Some(entry) = self.selection_history.undo_stack.pop_back() {
 8545            self.change_selections(None, cx, |s| s.select_anchors(entry.selections.to_vec()));
 8546            self.select_next_state = entry.select_next_state;
 8547            self.select_prev_state = entry.select_prev_state;
 8548            self.add_selections_state = entry.add_selections_state;
 8549            self.request_autoscroll(Autoscroll::newest(), cx);
 8550        }
 8551        self.selection_history.mode = SelectionHistoryMode::Normal;
 8552    }
 8553
 8554    pub fn redo_selection(&mut self, _: &RedoSelection, cx: &mut ViewContext<Self>) {
 8555        self.end_selection(cx);
 8556        self.selection_history.mode = SelectionHistoryMode::Redoing;
 8557        if let Some(entry) = self.selection_history.redo_stack.pop_back() {
 8558            self.change_selections(None, cx, |s| s.select_anchors(entry.selections.to_vec()));
 8559            self.select_next_state = entry.select_next_state;
 8560            self.select_prev_state = entry.select_prev_state;
 8561            self.add_selections_state = entry.add_selections_state;
 8562            self.request_autoscroll(Autoscroll::newest(), cx);
 8563        }
 8564        self.selection_history.mode = SelectionHistoryMode::Normal;
 8565    }
 8566
 8567    pub fn expand_excerpts(&mut self, action: &ExpandExcerpts, cx: &mut ViewContext<Self>) {
 8568        self.expand_excerpts_for_direction(action.lines, ExpandExcerptDirection::UpAndDown, cx)
 8569    }
 8570
 8571    pub fn expand_excerpts_down(
 8572        &mut self,
 8573        action: &ExpandExcerptsDown,
 8574        cx: &mut ViewContext<Self>,
 8575    ) {
 8576        self.expand_excerpts_for_direction(action.lines, ExpandExcerptDirection::Down, cx)
 8577    }
 8578
 8579    pub fn expand_excerpts_up(&mut self, action: &ExpandExcerptsUp, cx: &mut ViewContext<Self>) {
 8580        self.expand_excerpts_for_direction(action.lines, ExpandExcerptDirection::Up, cx)
 8581    }
 8582
 8583    pub fn expand_excerpts_for_direction(
 8584        &mut self,
 8585        lines: u32,
 8586        direction: ExpandExcerptDirection,
 8587        cx: &mut ViewContext<Self>,
 8588    ) {
 8589        let selections = self.selections.disjoint_anchors();
 8590
 8591        let lines = if lines == 0 {
 8592            EditorSettings::get_global(cx).expand_excerpt_lines
 8593        } else {
 8594            lines
 8595        };
 8596
 8597        self.buffer.update(cx, |buffer, cx| {
 8598            buffer.expand_excerpts(
 8599                selections
 8600                    .into_iter()
 8601                    .map(|selection| selection.head().excerpt_id)
 8602                    .dedup(),
 8603                lines,
 8604                direction,
 8605                cx,
 8606            )
 8607        })
 8608    }
 8609
 8610    pub fn expand_excerpt(
 8611        &mut self,
 8612        excerpt: ExcerptId,
 8613        direction: ExpandExcerptDirection,
 8614        cx: &mut ViewContext<Self>,
 8615    ) {
 8616        let lines = EditorSettings::get_global(cx).expand_excerpt_lines;
 8617        self.buffer.update(cx, |buffer, cx| {
 8618            buffer.expand_excerpts([excerpt], lines, direction, cx)
 8619        })
 8620    }
 8621
 8622    fn go_to_diagnostic(&mut self, _: &GoToDiagnostic, cx: &mut ViewContext<Self>) {
 8623        self.go_to_diagnostic_impl(Direction::Next, cx)
 8624    }
 8625
 8626    fn go_to_prev_diagnostic(&mut self, _: &GoToPrevDiagnostic, cx: &mut ViewContext<Self>) {
 8627        self.go_to_diagnostic_impl(Direction::Prev, cx)
 8628    }
 8629
 8630    pub fn go_to_diagnostic_impl(&mut self, direction: Direction, cx: &mut ViewContext<Self>) {
 8631        let buffer = self.buffer.read(cx).snapshot(cx);
 8632        let selection = self.selections.newest::<usize>(cx);
 8633
 8634        // If there is an active Diagnostic Popover jump to its diagnostic instead.
 8635        if direction == Direction::Next {
 8636            if let Some(popover) = self.hover_state.diagnostic_popover.as_ref() {
 8637                let (group_id, jump_to) = popover.activation_info();
 8638                if self.activate_diagnostics(group_id, cx) {
 8639                    self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8640                        let mut new_selection = s.newest_anchor().clone();
 8641                        new_selection.collapse_to(jump_to, SelectionGoal::None);
 8642                        s.select_anchors(vec![new_selection.clone()]);
 8643                    });
 8644                }
 8645                return;
 8646            }
 8647        }
 8648
 8649        let mut active_primary_range = self.active_diagnostics.as_ref().map(|active_diagnostics| {
 8650            active_diagnostics
 8651                .primary_range
 8652                .to_offset(&buffer)
 8653                .to_inclusive()
 8654        });
 8655        let mut search_start = if let Some(active_primary_range) = active_primary_range.as_ref() {
 8656            if active_primary_range.contains(&selection.head()) {
 8657                *active_primary_range.start()
 8658            } else {
 8659                selection.head()
 8660            }
 8661        } else {
 8662            selection.head()
 8663        };
 8664        let snapshot = self.snapshot(cx);
 8665        loop {
 8666            let diagnostics = if direction == Direction::Prev {
 8667                buffer.diagnostics_in_range::<_, usize>(0..search_start, true)
 8668            } else {
 8669                buffer.diagnostics_in_range::<_, usize>(search_start..buffer.len(), false)
 8670            }
 8671            .filter(|diagnostic| !snapshot.intersects_fold(diagnostic.range.start));
 8672            let group = diagnostics
 8673                // relies on diagnostics_in_range to return diagnostics with the same starting range to
 8674                // be sorted in a stable way
 8675                // skip until we are at current active diagnostic, if it exists
 8676                .skip_while(|entry| {
 8677                    (match direction {
 8678                        Direction::Prev => entry.range.start >= search_start,
 8679                        Direction::Next => entry.range.start <= search_start,
 8680                    }) && self
 8681                        .active_diagnostics
 8682                        .as_ref()
 8683                        .is_some_and(|a| a.group_id != entry.diagnostic.group_id)
 8684                })
 8685                .find_map(|entry| {
 8686                    if entry.diagnostic.is_primary
 8687                        && entry.diagnostic.severity <= DiagnosticSeverity::WARNING
 8688                        && !entry.range.is_empty()
 8689                        // if we match with the active diagnostic, skip it
 8690                        && Some(entry.diagnostic.group_id)
 8691                            != self.active_diagnostics.as_ref().map(|d| d.group_id)
 8692                    {
 8693                        Some((entry.range, entry.diagnostic.group_id))
 8694                    } else {
 8695                        None
 8696                    }
 8697                });
 8698
 8699            if let Some((primary_range, group_id)) = group {
 8700                if self.activate_diagnostics(group_id, cx) {
 8701                    self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8702                        s.select(vec![Selection {
 8703                            id: selection.id,
 8704                            start: primary_range.start,
 8705                            end: primary_range.start,
 8706                            reversed: false,
 8707                            goal: SelectionGoal::None,
 8708                        }]);
 8709                    });
 8710                }
 8711                break;
 8712            } else {
 8713                // Cycle around to the start of the buffer, potentially moving back to the start of
 8714                // the currently active diagnostic.
 8715                active_primary_range.take();
 8716                if direction == Direction::Prev {
 8717                    if search_start == buffer.len() {
 8718                        break;
 8719                    } else {
 8720                        search_start = buffer.len();
 8721                    }
 8722                } else if search_start == 0 {
 8723                    break;
 8724                } else {
 8725                    search_start = 0;
 8726                }
 8727            }
 8728        }
 8729    }
 8730
 8731    fn go_to_hunk(&mut self, _: &GoToHunk, cx: &mut ViewContext<Self>) {
 8732        let snapshot = self
 8733            .display_map
 8734            .update(cx, |display_map, cx| display_map.snapshot(cx));
 8735        let selection = self.selections.newest::<Point>(cx);
 8736
 8737        if !self.seek_in_direction(
 8738            &snapshot,
 8739            selection.head(),
 8740            false,
 8741            snapshot.buffer_snapshot.git_diff_hunks_in_range(
 8742                MultiBufferRow(selection.head().row + 1)..MultiBufferRow::MAX,
 8743            ),
 8744            cx,
 8745        ) {
 8746            let wrapped_point = Point::zero();
 8747            self.seek_in_direction(
 8748                &snapshot,
 8749                wrapped_point,
 8750                true,
 8751                snapshot.buffer_snapshot.git_diff_hunks_in_range(
 8752                    MultiBufferRow(wrapped_point.row + 1)..MultiBufferRow::MAX,
 8753                ),
 8754                cx,
 8755            );
 8756        }
 8757    }
 8758
 8759    fn go_to_prev_hunk(&mut self, _: &GoToPrevHunk, cx: &mut ViewContext<Self>) {
 8760        let snapshot = self
 8761            .display_map
 8762            .update(cx, |display_map, cx| display_map.snapshot(cx));
 8763        let selection = self.selections.newest::<Point>(cx);
 8764
 8765        if !self.seek_in_direction(
 8766            &snapshot,
 8767            selection.head(),
 8768            false,
 8769            snapshot.buffer_snapshot.git_diff_hunks_in_range_rev(
 8770                MultiBufferRow(0)..MultiBufferRow(selection.head().row),
 8771            ),
 8772            cx,
 8773        ) {
 8774            let wrapped_point = snapshot.buffer_snapshot.max_point();
 8775            self.seek_in_direction(
 8776                &snapshot,
 8777                wrapped_point,
 8778                true,
 8779                snapshot.buffer_snapshot.git_diff_hunks_in_range_rev(
 8780                    MultiBufferRow(0)..MultiBufferRow(wrapped_point.row),
 8781                ),
 8782                cx,
 8783            );
 8784        }
 8785    }
 8786
 8787    fn seek_in_direction(
 8788        &mut self,
 8789        snapshot: &DisplaySnapshot,
 8790        initial_point: Point,
 8791        is_wrapped: bool,
 8792        hunks: impl Iterator<Item = DiffHunk<MultiBufferRow>>,
 8793        cx: &mut ViewContext<Editor>,
 8794    ) -> bool {
 8795        let display_point = initial_point.to_display_point(snapshot);
 8796        let mut hunks = hunks
 8797            .map(|hunk| diff_hunk_to_display(&hunk, &snapshot))
 8798            .filter(|hunk| {
 8799                if is_wrapped {
 8800                    true
 8801                } else {
 8802                    !hunk.contains_display_row(display_point.row())
 8803                }
 8804            })
 8805            .dedup();
 8806
 8807        if let Some(hunk) = hunks.next() {
 8808            self.change_selections(Some(Autoscroll::fit()), cx, |s| {
 8809                let row = hunk.start_display_row();
 8810                let point = DisplayPoint::new(row, 0);
 8811                s.select_display_ranges([point..point]);
 8812            });
 8813
 8814            true
 8815        } else {
 8816            false
 8817        }
 8818    }
 8819
 8820    pub fn go_to_definition(
 8821        &mut self,
 8822        _: &GoToDefinition,
 8823        cx: &mut ViewContext<Self>,
 8824    ) -> Task<Result<bool>> {
 8825        self.go_to_definition_of_kind(GotoDefinitionKind::Symbol, false, cx)
 8826    }
 8827
 8828    pub fn go_to_implementation(
 8829        &mut self,
 8830        _: &GoToImplementation,
 8831        cx: &mut ViewContext<Self>,
 8832    ) -> Task<Result<bool>> {
 8833        self.go_to_definition_of_kind(GotoDefinitionKind::Implementation, false, cx)
 8834    }
 8835
 8836    pub fn go_to_implementation_split(
 8837        &mut self,
 8838        _: &GoToImplementationSplit,
 8839        cx: &mut ViewContext<Self>,
 8840    ) -> Task<Result<bool>> {
 8841        self.go_to_definition_of_kind(GotoDefinitionKind::Implementation, true, cx)
 8842    }
 8843
 8844    pub fn go_to_type_definition(
 8845        &mut self,
 8846        _: &GoToTypeDefinition,
 8847        cx: &mut ViewContext<Self>,
 8848    ) -> Task<Result<bool>> {
 8849        self.go_to_definition_of_kind(GotoDefinitionKind::Type, false, cx)
 8850    }
 8851
 8852    pub fn go_to_definition_split(
 8853        &mut self,
 8854        _: &GoToDefinitionSplit,
 8855        cx: &mut ViewContext<Self>,
 8856    ) -> Task<Result<bool>> {
 8857        self.go_to_definition_of_kind(GotoDefinitionKind::Symbol, true, cx)
 8858    }
 8859
 8860    pub fn go_to_type_definition_split(
 8861        &mut self,
 8862        _: &GoToTypeDefinitionSplit,
 8863        cx: &mut ViewContext<Self>,
 8864    ) -> Task<Result<bool>> {
 8865        self.go_to_definition_of_kind(GotoDefinitionKind::Type, true, cx)
 8866    }
 8867
 8868    fn go_to_definition_of_kind(
 8869        &mut self,
 8870        kind: GotoDefinitionKind,
 8871        split: bool,
 8872        cx: &mut ViewContext<Self>,
 8873    ) -> Task<Result<bool>> {
 8874        let Some(workspace) = self.workspace() else {
 8875            return Task::ready(Ok(false));
 8876        };
 8877        let buffer = self.buffer.read(cx);
 8878        let head = self.selections.newest::<usize>(cx).head();
 8879        let (buffer, head) = if let Some(text_anchor) = buffer.text_anchor_for_position(head, cx) {
 8880            text_anchor
 8881        } else {
 8882            return Task::ready(Ok(false));
 8883        };
 8884
 8885        let project = workspace.read(cx).project().clone();
 8886        let definitions = project.update(cx, |project, cx| match kind {
 8887            GotoDefinitionKind::Symbol => project.definition(&buffer, head, cx),
 8888            GotoDefinitionKind::Type => project.type_definition(&buffer, head, cx),
 8889            GotoDefinitionKind::Implementation => project.implementation(&buffer, head, cx),
 8890        });
 8891
 8892        cx.spawn(|editor, mut cx| async move {
 8893            let definitions = definitions.await?;
 8894            let navigated = editor
 8895                .update(&mut cx, |editor, cx| {
 8896                    editor.navigate_to_hover_links(
 8897                        Some(kind),
 8898                        definitions
 8899                            .into_iter()
 8900                            .filter(|location| {
 8901                                hover_links::exclude_link_to_position(&buffer, &head, location, cx)
 8902                            })
 8903                            .map(HoverLink::Text)
 8904                            .collect::<Vec<_>>(),
 8905                        split,
 8906                        cx,
 8907                    )
 8908                })?
 8909                .await?;
 8910            anyhow::Ok(navigated)
 8911        })
 8912    }
 8913
 8914    pub fn open_url(&mut self, _: &OpenUrl, cx: &mut ViewContext<Self>) {
 8915        let position = self.selections.newest_anchor().head();
 8916        let Some((buffer, buffer_position)) =
 8917            self.buffer.read(cx).text_anchor_for_position(position, cx)
 8918        else {
 8919            return;
 8920        };
 8921
 8922        cx.spawn(|editor, mut cx| async move {
 8923            if let Some((_, url)) = find_url(&buffer, buffer_position, cx.clone()) {
 8924                editor.update(&mut cx, |_, cx| {
 8925                    cx.open_url(&url);
 8926                })
 8927            } else {
 8928                Ok(())
 8929            }
 8930        })
 8931        .detach();
 8932    }
 8933
 8934    pub(crate) fn navigate_to_hover_links(
 8935        &mut self,
 8936        kind: Option<GotoDefinitionKind>,
 8937        mut definitions: Vec<HoverLink>,
 8938        split: bool,
 8939        cx: &mut ViewContext<Editor>,
 8940    ) -> Task<Result<bool>> {
 8941        // If there is one definition, just open it directly
 8942        if definitions.len() == 1 {
 8943            let definition = definitions.pop().unwrap();
 8944            let target_task = match definition {
 8945                HoverLink::Text(link) => Task::Ready(Some(Ok(Some(link.target)))),
 8946                HoverLink::InlayHint(lsp_location, server_id) => {
 8947                    self.compute_target_location(lsp_location, server_id, cx)
 8948                }
 8949                HoverLink::Url(url) => {
 8950                    cx.open_url(&url);
 8951                    Task::ready(Ok(None))
 8952                }
 8953            };
 8954            cx.spawn(|editor, mut cx| async move {
 8955                let target = target_task.await.context("target resolution task")?;
 8956                if let Some(target) = target {
 8957                    editor.update(&mut cx, |editor, cx| {
 8958                        let Some(workspace) = editor.workspace() else {
 8959                            return false;
 8960                        };
 8961                        let pane = workspace.read(cx).active_pane().clone();
 8962
 8963                        let range = target.range.to_offset(target.buffer.read(cx));
 8964                        let range = editor.range_for_match(&range);
 8965
 8966                        /// If select range has more than one line, we
 8967                        /// just point the cursor to range.start.
 8968                        fn check_multiline_range(
 8969                            buffer: &Buffer,
 8970                            range: Range<usize>,
 8971                        ) -> Range<usize> {
 8972                            if buffer.offset_to_point(range.start).row
 8973                                == buffer.offset_to_point(range.end).row
 8974                            {
 8975                                range
 8976                            } else {
 8977                                range.start..range.start
 8978                            }
 8979                        }
 8980
 8981                        if Some(&target.buffer) == editor.buffer.read(cx).as_singleton().as_ref() {
 8982                            let buffer = target.buffer.read(cx);
 8983                            let range = check_multiline_range(buffer, range);
 8984                            editor.change_selections(Some(Autoscroll::focused()), cx, |s| {
 8985                                s.select_ranges([range]);
 8986                            });
 8987                        } else {
 8988                            cx.window_context().defer(move |cx| {
 8989                                let target_editor: View<Self> =
 8990                                    workspace.update(cx, |workspace, cx| {
 8991                                        let pane = if split {
 8992                                            workspace.adjacent_pane(cx)
 8993                                        } else {
 8994                                            workspace.active_pane().clone()
 8995                                        };
 8996
 8997                                        workspace.open_project_item(pane, target.buffer.clone(), cx)
 8998                                    });
 8999                                target_editor.update(cx, |target_editor, cx| {
 9000                                    // When selecting a definition in a different buffer, disable the nav history
 9001                                    // to avoid creating a history entry at the previous cursor location.
 9002                                    pane.update(cx, |pane, _| pane.disable_history());
 9003                                    let buffer = target.buffer.read(cx);
 9004                                    let range = check_multiline_range(buffer, range);
 9005                                    target_editor.change_selections(
 9006                                        Some(Autoscroll::focused()),
 9007                                        cx,
 9008                                        |s| {
 9009                                            s.select_ranges([range]);
 9010                                        },
 9011                                    );
 9012                                    pane.update(cx, |pane, _| pane.enable_history());
 9013                                });
 9014                            });
 9015                        }
 9016                        true
 9017                    })
 9018                } else {
 9019                    Ok(false)
 9020                }
 9021            })
 9022        } else if !definitions.is_empty() {
 9023            let replica_id = self.replica_id(cx);
 9024            cx.spawn(|editor, mut cx| async move {
 9025                let (title, location_tasks, workspace) = editor
 9026                    .update(&mut cx, |editor, cx| {
 9027                        let tab_kind = match kind {
 9028                            Some(GotoDefinitionKind::Implementation) => "Implementations",
 9029                            _ => "Definitions",
 9030                        };
 9031                        let title = definitions
 9032                            .iter()
 9033                            .find_map(|definition| match definition {
 9034                                HoverLink::Text(link) => link.origin.as_ref().map(|origin| {
 9035                                    let buffer = origin.buffer.read(cx);
 9036                                    format!(
 9037                                        "{} for {}",
 9038                                        tab_kind,
 9039                                        buffer
 9040                                            .text_for_range(origin.range.clone())
 9041                                            .collect::<String>()
 9042                                    )
 9043                                }),
 9044                                HoverLink::InlayHint(_, _) => None,
 9045                                HoverLink::Url(_) => None,
 9046                            })
 9047                            .unwrap_or(tab_kind.to_string());
 9048                        let location_tasks = definitions
 9049                            .into_iter()
 9050                            .map(|definition| match definition {
 9051                                HoverLink::Text(link) => Task::Ready(Some(Ok(Some(link.target)))),
 9052                                HoverLink::InlayHint(lsp_location, server_id) => {
 9053                                    editor.compute_target_location(lsp_location, server_id, cx)
 9054                                }
 9055                                HoverLink::Url(_) => Task::ready(Ok(None)),
 9056                            })
 9057                            .collect::<Vec<_>>();
 9058                        (title, location_tasks, editor.workspace().clone())
 9059                    })
 9060                    .context("location tasks preparation")?;
 9061
 9062                let locations = futures::future::join_all(location_tasks)
 9063                    .await
 9064                    .into_iter()
 9065                    .filter_map(|location| location.transpose())
 9066                    .collect::<Result<_>>()
 9067                    .context("location tasks")?;
 9068
 9069                let Some(workspace) = workspace else {
 9070                    return Ok(false);
 9071                };
 9072                let opened = workspace
 9073                    .update(&mut cx, |workspace, cx| {
 9074                        Self::open_locations_in_multibuffer(
 9075                            workspace, locations, replica_id, title, split, cx,
 9076                        )
 9077                    })
 9078                    .ok();
 9079
 9080                anyhow::Ok(opened.is_some())
 9081            })
 9082        } else {
 9083            Task::ready(Ok(false))
 9084        }
 9085    }
 9086
 9087    fn compute_target_location(
 9088        &self,
 9089        lsp_location: lsp::Location,
 9090        server_id: LanguageServerId,
 9091        cx: &mut ViewContext<Editor>,
 9092    ) -> Task<anyhow::Result<Option<Location>>> {
 9093        let Some(project) = self.project.clone() else {
 9094            return Task::Ready(Some(Ok(None)));
 9095        };
 9096
 9097        cx.spawn(move |editor, mut cx| async move {
 9098            let location_task = editor.update(&mut cx, |editor, cx| {
 9099                project.update(cx, |project, cx| {
 9100                    let language_server_name =
 9101                        editor.buffer.read(cx).as_singleton().and_then(|buffer| {
 9102                            project
 9103                                .language_server_for_buffer(buffer.read(cx), server_id, cx)
 9104                                .map(|(lsp_adapter, _)| lsp_adapter.name.clone())
 9105                        });
 9106                    language_server_name.map(|language_server_name| {
 9107                        project.open_local_buffer_via_lsp(
 9108                            lsp_location.uri.clone(),
 9109                            server_id,
 9110                            language_server_name,
 9111                            cx,
 9112                        )
 9113                    })
 9114                })
 9115            })?;
 9116            let location = match location_task {
 9117                Some(task) => Some({
 9118                    let target_buffer_handle = task.await.context("open local buffer")?;
 9119                    let range = target_buffer_handle.update(&mut cx, |target_buffer, _| {
 9120                        let target_start = target_buffer
 9121                            .clip_point_utf16(point_from_lsp(lsp_location.range.start), Bias::Left);
 9122                        let target_end = target_buffer
 9123                            .clip_point_utf16(point_from_lsp(lsp_location.range.end), Bias::Left);
 9124                        target_buffer.anchor_after(target_start)
 9125                            ..target_buffer.anchor_before(target_end)
 9126                    })?;
 9127                    Location {
 9128                        buffer: target_buffer_handle,
 9129                        range,
 9130                    }
 9131                }),
 9132                None => None,
 9133            };
 9134            Ok(location)
 9135        })
 9136    }
 9137
 9138    pub fn find_all_references(
 9139        &mut self,
 9140        _: &FindAllReferences,
 9141        cx: &mut ViewContext<Self>,
 9142    ) -> Option<Task<Result<()>>> {
 9143        let multi_buffer = self.buffer.read(cx);
 9144        let selection = self.selections.newest::<usize>(cx);
 9145        let head = selection.head();
 9146
 9147        let multi_buffer_snapshot = multi_buffer.snapshot(cx);
 9148        let head_anchor = multi_buffer_snapshot.anchor_at(
 9149            head,
 9150            if head < selection.tail() {
 9151                Bias::Right
 9152            } else {
 9153                Bias::Left
 9154            },
 9155        );
 9156
 9157        match self
 9158            .find_all_references_task_sources
 9159            .binary_search_by(|anchor| anchor.cmp(&head_anchor, &multi_buffer_snapshot))
 9160        {
 9161            Ok(_) => {
 9162                log::info!(
 9163                    "Ignoring repeated FindAllReferences invocation with the position of already running task"
 9164                );
 9165                return None;
 9166            }
 9167            Err(i) => {
 9168                self.find_all_references_task_sources.insert(i, head_anchor);
 9169            }
 9170        }
 9171
 9172        let (buffer, head) = multi_buffer.text_anchor_for_position(head, cx)?;
 9173        let replica_id = self.replica_id(cx);
 9174        let workspace = self.workspace()?;
 9175        let project = workspace.read(cx).project().clone();
 9176        let references = project.update(cx, |project, cx| project.references(&buffer, head, cx));
 9177        Some(cx.spawn(|editor, mut cx| async move {
 9178            let _cleanup = defer({
 9179                let mut cx = cx.clone();
 9180                move || {
 9181                    let _ = editor.update(&mut cx, |editor, _| {
 9182                        if let Ok(i) =
 9183                            editor
 9184                                .find_all_references_task_sources
 9185                                .binary_search_by(|anchor| {
 9186                                    anchor.cmp(&head_anchor, &multi_buffer_snapshot)
 9187                                })
 9188                        {
 9189                            editor.find_all_references_task_sources.remove(i);
 9190                        }
 9191                    });
 9192                }
 9193            });
 9194
 9195            let locations = references.await?;
 9196            if locations.is_empty() {
 9197                return anyhow::Ok(());
 9198            }
 9199
 9200            workspace.update(&mut cx, |workspace, cx| {
 9201                let title = locations
 9202                    .first()
 9203                    .as_ref()
 9204                    .map(|location| {
 9205                        let buffer = location.buffer.read(cx);
 9206                        format!(
 9207                            "References to `{}`",
 9208                            buffer
 9209                                .text_for_range(location.range.clone())
 9210                                .collect::<String>()
 9211                        )
 9212                    })
 9213                    .unwrap();
 9214                Self::open_locations_in_multibuffer(
 9215                    workspace, locations, replica_id, title, false, cx,
 9216                );
 9217            })
 9218        }))
 9219    }
 9220
 9221    /// Opens a multibuffer with the given project locations in it
 9222    pub fn open_locations_in_multibuffer(
 9223        workspace: &mut Workspace,
 9224        mut locations: Vec<Location>,
 9225        replica_id: ReplicaId,
 9226        title: String,
 9227        split: bool,
 9228        cx: &mut ViewContext<Workspace>,
 9229    ) {
 9230        // If there are multiple definitions, open them in a multibuffer
 9231        locations.sort_by_key(|location| location.buffer.read(cx).remote_id());
 9232        let mut locations = locations.into_iter().peekable();
 9233        let mut ranges_to_highlight = Vec::new();
 9234        let capability = workspace.project().read(cx).capability();
 9235
 9236        let excerpt_buffer = cx.new_model(|cx| {
 9237            let mut multibuffer = MultiBuffer::new(replica_id, capability);
 9238            while let Some(location) = locations.next() {
 9239                let buffer = location.buffer.read(cx);
 9240                let mut ranges_for_buffer = Vec::new();
 9241                let range = location.range.to_offset(buffer);
 9242                ranges_for_buffer.push(range.clone());
 9243
 9244                while let Some(next_location) = locations.peek() {
 9245                    if next_location.buffer == location.buffer {
 9246                        ranges_for_buffer.push(next_location.range.to_offset(buffer));
 9247                        locations.next();
 9248                    } else {
 9249                        break;
 9250                    }
 9251                }
 9252
 9253                ranges_for_buffer.sort_by_key(|range| (range.start, Reverse(range.end)));
 9254                ranges_to_highlight.extend(multibuffer.push_excerpts_with_context_lines(
 9255                    location.buffer.clone(),
 9256                    ranges_for_buffer,
 9257                    DEFAULT_MULTIBUFFER_CONTEXT,
 9258                    cx,
 9259                ))
 9260            }
 9261
 9262            multibuffer.with_title(title)
 9263        });
 9264
 9265        let editor = cx.new_view(|cx| {
 9266            Editor::for_multibuffer(excerpt_buffer, Some(workspace.project().clone()), true, cx)
 9267        });
 9268        editor.update(cx, |editor, cx| {
 9269            if let Some(first_range) = ranges_to_highlight.first() {
 9270                editor.change_selections(None, cx, |selections| {
 9271                    selections.clear_disjoint();
 9272                    selections.select_anchor_ranges(std::iter::once(first_range.clone()));
 9273                });
 9274            }
 9275            editor.highlight_background::<Self>(
 9276                &ranges_to_highlight,
 9277                |theme| theme.editor_highlighted_line_background,
 9278                cx,
 9279            );
 9280        });
 9281
 9282        let item = Box::new(editor);
 9283        let item_id = item.item_id();
 9284
 9285        if split {
 9286            workspace.split_item(SplitDirection::Right, item.clone(), cx);
 9287        } else {
 9288            let destination_index = workspace.active_pane().update(cx, |pane, cx| {
 9289                if PreviewTabsSettings::get_global(cx).enable_preview_from_code_navigation {
 9290                    pane.close_current_preview_item(cx)
 9291                } else {
 9292                    None
 9293                }
 9294            });
 9295            workspace.add_item_to_active_pane(item.clone(), destination_index, cx);
 9296        }
 9297        workspace.active_pane().update(cx, |pane, cx| {
 9298            pane.set_preview_item_id(Some(item_id), cx);
 9299        });
 9300    }
 9301
 9302    pub fn rename(&mut self, _: &Rename, cx: &mut ViewContext<Self>) -> Option<Task<Result<()>>> {
 9303        use language::ToOffset as _;
 9304
 9305        let project = self.project.clone()?;
 9306        let selection = self.selections.newest_anchor().clone();
 9307        let (cursor_buffer, cursor_buffer_position) = self
 9308            .buffer
 9309            .read(cx)
 9310            .text_anchor_for_position(selection.head(), cx)?;
 9311        let (tail_buffer, cursor_buffer_position_end) = self
 9312            .buffer
 9313            .read(cx)
 9314            .text_anchor_for_position(selection.tail(), cx)?;
 9315        if tail_buffer != cursor_buffer {
 9316            return None;
 9317        }
 9318
 9319        let snapshot = cursor_buffer.read(cx).snapshot();
 9320        let cursor_buffer_offset = cursor_buffer_position.to_offset(&snapshot);
 9321        let cursor_buffer_offset_end = cursor_buffer_position_end.to_offset(&snapshot);
 9322        let prepare_rename = project.update(cx, |project, cx| {
 9323            project.prepare_rename(cursor_buffer.clone(), cursor_buffer_offset, cx)
 9324        });
 9325        drop(snapshot);
 9326
 9327        Some(cx.spawn(|this, mut cx| async move {
 9328            let rename_range = if let Some(range) = prepare_rename.await? {
 9329                Some(range)
 9330            } else {
 9331                this.update(&mut cx, |this, cx| {
 9332                    let buffer = this.buffer.read(cx).snapshot(cx);
 9333                    let mut buffer_highlights = this
 9334                        .document_highlights_for_position(selection.head(), &buffer)
 9335                        .filter(|highlight| {
 9336                            highlight.start.excerpt_id == selection.head().excerpt_id
 9337                                && highlight.end.excerpt_id == selection.head().excerpt_id
 9338                        });
 9339                    buffer_highlights
 9340                        .next()
 9341                        .map(|highlight| highlight.start.text_anchor..highlight.end.text_anchor)
 9342                })?
 9343            };
 9344            if let Some(rename_range) = rename_range {
 9345                this.update(&mut cx, |this, cx| {
 9346                    let snapshot = cursor_buffer.read(cx).snapshot();
 9347                    let rename_buffer_range = rename_range.to_offset(&snapshot);
 9348                    let cursor_offset_in_rename_range =
 9349                        cursor_buffer_offset.saturating_sub(rename_buffer_range.start);
 9350                    let cursor_offset_in_rename_range_end =
 9351                        cursor_buffer_offset_end.saturating_sub(rename_buffer_range.start);
 9352
 9353                    this.take_rename(false, cx);
 9354                    let buffer = this.buffer.read(cx).read(cx);
 9355                    let cursor_offset = selection.head().to_offset(&buffer);
 9356                    let rename_start = cursor_offset.saturating_sub(cursor_offset_in_rename_range);
 9357                    let rename_end = rename_start + rename_buffer_range.len();
 9358                    let range = buffer.anchor_before(rename_start)..buffer.anchor_after(rename_end);
 9359                    let mut old_highlight_id = None;
 9360                    let old_name: Arc<str> = buffer
 9361                        .chunks(rename_start..rename_end, true)
 9362                        .map(|chunk| {
 9363                            if old_highlight_id.is_none() {
 9364                                old_highlight_id = chunk.syntax_highlight_id;
 9365                            }
 9366                            chunk.text
 9367                        })
 9368                        .collect::<String>()
 9369                        .into();
 9370
 9371                    drop(buffer);
 9372
 9373                    // Position the selection in the rename editor so that it matches the current selection.
 9374                    this.show_local_selections = false;
 9375                    let rename_editor = cx.new_view(|cx| {
 9376                        let mut editor = Editor::single_line(cx);
 9377                        editor.buffer.update(cx, |buffer, cx| {
 9378                            buffer.edit([(0..0, old_name.clone())], None, cx)
 9379                        });
 9380                        let rename_selection_range = match cursor_offset_in_rename_range
 9381                            .cmp(&cursor_offset_in_rename_range_end)
 9382                        {
 9383                            Ordering::Equal => {
 9384                                editor.select_all(&SelectAll, cx);
 9385                                return editor;
 9386                            }
 9387                            Ordering::Less => {
 9388                                cursor_offset_in_rename_range..cursor_offset_in_rename_range_end
 9389                            }
 9390                            Ordering::Greater => {
 9391                                cursor_offset_in_rename_range_end..cursor_offset_in_rename_range
 9392                            }
 9393                        };
 9394                        if rename_selection_range.end > old_name.len() {
 9395                            editor.select_all(&SelectAll, cx);
 9396                        } else {
 9397                            editor.change_selections(Some(Autoscroll::fit()), cx, |s| {
 9398                                s.select_ranges([rename_selection_range]);
 9399                            });
 9400                        }
 9401                        editor
 9402                    });
 9403
 9404                    let write_highlights =
 9405                        this.clear_background_highlights::<DocumentHighlightWrite>(cx);
 9406                    let read_highlights =
 9407                        this.clear_background_highlights::<DocumentHighlightRead>(cx);
 9408                    let ranges = write_highlights
 9409                        .iter()
 9410                        .flat_map(|(_, ranges)| ranges.iter())
 9411                        .chain(read_highlights.iter().flat_map(|(_, ranges)| ranges.iter()))
 9412                        .cloned()
 9413                        .collect();
 9414
 9415                    this.highlight_text::<Rename>(
 9416                        ranges,
 9417                        HighlightStyle {
 9418                            fade_out: Some(0.6),
 9419                            ..Default::default()
 9420                        },
 9421                        cx,
 9422                    );
 9423                    let rename_focus_handle = rename_editor.focus_handle(cx);
 9424                    cx.focus(&rename_focus_handle);
 9425                    let block_id = this.insert_blocks(
 9426                        [BlockProperties {
 9427                            style: BlockStyle::Flex,
 9428                            position: range.start,
 9429                            height: 1,
 9430                            render: Box::new({
 9431                                let rename_editor = rename_editor.clone();
 9432                                move |cx: &mut BlockContext| {
 9433                                    let mut text_style = cx.editor_style.text.clone();
 9434                                    if let Some(highlight_style) = old_highlight_id
 9435                                        .and_then(|h| h.style(&cx.editor_style.syntax))
 9436                                    {
 9437                                        text_style = text_style.highlight(highlight_style);
 9438                                    }
 9439                                    div()
 9440                                        .pl(cx.anchor_x)
 9441                                        .child(EditorElement::new(
 9442                                            &rename_editor,
 9443                                            EditorStyle {
 9444                                                background: cx.theme().system().transparent,
 9445                                                local_player: cx.editor_style.local_player,
 9446                                                text: text_style,
 9447                                                scrollbar_width: cx.editor_style.scrollbar_width,
 9448                                                syntax: cx.editor_style.syntax.clone(),
 9449                                                status: cx.editor_style.status.clone(),
 9450                                                inlay_hints_style: HighlightStyle {
 9451                                                    color: Some(cx.theme().status().hint),
 9452                                                    font_weight: Some(FontWeight::BOLD),
 9453                                                    ..HighlightStyle::default()
 9454                                                },
 9455                                                suggestions_style: HighlightStyle {
 9456                                                    color: Some(cx.theme().status().predictive),
 9457                                                    ..HighlightStyle::default()
 9458                                                },
 9459                                            },
 9460                                        ))
 9461                                        .into_any_element()
 9462                                }
 9463                            }),
 9464                            disposition: BlockDisposition::Below,
 9465                        }],
 9466                        Some(Autoscroll::fit()),
 9467                        cx,
 9468                    )[0];
 9469                    this.pending_rename = Some(RenameState {
 9470                        range,
 9471                        old_name,
 9472                        editor: rename_editor,
 9473                        block_id,
 9474                    });
 9475                })?;
 9476            }
 9477
 9478            Ok(())
 9479        }))
 9480    }
 9481
 9482    pub fn confirm_rename(
 9483        &mut self,
 9484        _: &ConfirmRename,
 9485        cx: &mut ViewContext<Self>,
 9486    ) -> Option<Task<Result<()>>> {
 9487        let rename = self.take_rename(false, cx)?;
 9488        let workspace = self.workspace()?;
 9489        let (start_buffer, start) = self
 9490            .buffer
 9491            .read(cx)
 9492            .text_anchor_for_position(rename.range.start, cx)?;
 9493        let (end_buffer, end) = self
 9494            .buffer
 9495            .read(cx)
 9496            .text_anchor_for_position(rename.range.end, cx)?;
 9497        if start_buffer != end_buffer {
 9498            return None;
 9499        }
 9500
 9501        let buffer = start_buffer;
 9502        let range = start..end;
 9503        let old_name = rename.old_name;
 9504        let new_name = rename.editor.read(cx).text(cx);
 9505
 9506        let rename = workspace
 9507            .read(cx)
 9508            .project()
 9509            .clone()
 9510            .update(cx, |project, cx| {
 9511                project.perform_rename(buffer.clone(), range.start, new_name.clone(), true, cx)
 9512            });
 9513        let workspace = workspace.downgrade();
 9514
 9515        Some(cx.spawn(|editor, mut cx| async move {
 9516            let project_transaction = rename.await?;
 9517            Self::open_project_transaction(
 9518                &editor,
 9519                workspace,
 9520                project_transaction,
 9521                format!("Rename: {} → {}", old_name, new_name),
 9522                cx.clone(),
 9523            )
 9524            .await?;
 9525
 9526            editor.update(&mut cx, |editor, cx| {
 9527                editor.refresh_document_highlights(cx);
 9528            })?;
 9529            Ok(())
 9530        }))
 9531    }
 9532
 9533    fn take_rename(
 9534        &mut self,
 9535        moving_cursor: bool,
 9536        cx: &mut ViewContext<Self>,
 9537    ) -> Option<RenameState> {
 9538        let rename = self.pending_rename.take()?;
 9539        if rename.editor.focus_handle(cx).is_focused(cx) {
 9540            cx.focus(&self.focus_handle);
 9541        }
 9542
 9543        self.remove_blocks(
 9544            [rename.block_id].into_iter().collect(),
 9545            Some(Autoscroll::fit()),
 9546            cx,
 9547        );
 9548        self.clear_highlights::<Rename>(cx);
 9549        self.show_local_selections = true;
 9550
 9551        if moving_cursor {
 9552            let rename_editor = rename.editor.read(cx);
 9553            let cursor_in_rename_editor = rename_editor.selections.newest::<usize>(cx).head();
 9554
 9555            // Update the selection to match the position of the selection inside
 9556            // the rename editor.
 9557            let snapshot = self.buffer.read(cx).read(cx);
 9558            let rename_range = rename.range.to_offset(&snapshot);
 9559            let cursor_in_editor = snapshot
 9560                .clip_offset(rename_range.start + cursor_in_rename_editor, Bias::Left)
 9561                .min(rename_range.end);
 9562            drop(snapshot);
 9563
 9564            self.change_selections(None, cx, |s| {
 9565                s.select_ranges(vec![cursor_in_editor..cursor_in_editor])
 9566            });
 9567        } else {
 9568            self.refresh_document_highlights(cx);
 9569        }
 9570
 9571        Some(rename)
 9572    }
 9573
 9574    pub fn pending_rename(&self) -> Option<&RenameState> {
 9575        self.pending_rename.as_ref()
 9576    }
 9577
 9578    fn format(&mut self, _: &Format, cx: &mut ViewContext<Self>) -> Option<Task<Result<()>>> {
 9579        let project = match &self.project {
 9580            Some(project) => project.clone(),
 9581            None => return None,
 9582        };
 9583
 9584        Some(self.perform_format(project, FormatTrigger::Manual, cx))
 9585    }
 9586
 9587    fn perform_format(
 9588        &mut self,
 9589        project: Model<Project>,
 9590        trigger: FormatTrigger,
 9591        cx: &mut ViewContext<Self>,
 9592    ) -> Task<Result<()>> {
 9593        let buffer = self.buffer().clone();
 9594        let mut buffers = buffer.read(cx).all_buffers();
 9595        if trigger == FormatTrigger::Save {
 9596            buffers.retain(|buffer| buffer.read(cx).is_dirty());
 9597        }
 9598
 9599        let mut timeout = cx.background_executor().timer(FORMAT_TIMEOUT).fuse();
 9600        let format = project.update(cx, |project, cx| project.format(buffers, true, trigger, cx));
 9601
 9602        cx.spawn(|_, mut cx| async move {
 9603            let transaction = futures::select_biased! {
 9604                () = timeout => {
 9605                    log::warn!("timed out waiting for formatting");
 9606                    None
 9607                }
 9608                transaction = format.log_err().fuse() => transaction,
 9609            };
 9610
 9611            buffer
 9612                .update(&mut cx, |buffer, cx| {
 9613                    if let Some(transaction) = transaction {
 9614                        if !buffer.is_singleton() {
 9615                            buffer.push_transaction(&transaction.0, cx);
 9616                        }
 9617                    }
 9618
 9619                    cx.notify();
 9620                })
 9621                .ok();
 9622
 9623            Ok(())
 9624        })
 9625    }
 9626
 9627    fn restart_language_server(&mut self, _: &RestartLanguageServer, cx: &mut ViewContext<Self>) {
 9628        if let Some(project) = self.project.clone() {
 9629            self.buffer.update(cx, |multi_buffer, cx| {
 9630                project.update(cx, |project, cx| {
 9631                    project.restart_language_servers_for_buffers(multi_buffer.all_buffers(), cx);
 9632                });
 9633            })
 9634        }
 9635    }
 9636
 9637    fn cancel_language_server_work(
 9638        &mut self,
 9639        _: &CancelLanguageServerWork,
 9640        cx: &mut ViewContext<Self>,
 9641    ) {
 9642        if let Some(project) = self.project.clone() {
 9643            self.buffer.update(cx, |multi_buffer, cx| {
 9644                project.update(cx, |project, cx| {
 9645                    project.cancel_language_server_work_for_buffers(multi_buffer.all_buffers(), cx);
 9646                });
 9647            })
 9648        }
 9649    }
 9650
 9651    fn show_character_palette(&mut self, _: &ShowCharacterPalette, cx: &mut ViewContext<Self>) {
 9652        cx.show_character_palette();
 9653    }
 9654
 9655    fn refresh_active_diagnostics(&mut self, cx: &mut ViewContext<Editor>) {
 9656        if let Some(active_diagnostics) = self.active_diagnostics.as_mut() {
 9657            let buffer = self.buffer.read(cx).snapshot(cx);
 9658            let primary_range_start = active_diagnostics.primary_range.start.to_offset(&buffer);
 9659            let is_valid = buffer
 9660                .diagnostics_in_range::<_, usize>(active_diagnostics.primary_range.clone(), false)
 9661                .any(|entry| {
 9662                    entry.diagnostic.is_primary
 9663                        && !entry.range.is_empty()
 9664                        && entry.range.start == primary_range_start
 9665                        && entry.diagnostic.message == active_diagnostics.primary_message
 9666                });
 9667
 9668            if is_valid != active_diagnostics.is_valid {
 9669                active_diagnostics.is_valid = is_valid;
 9670                let mut new_styles = HashMap::default();
 9671                for (block_id, diagnostic) in &active_diagnostics.blocks {
 9672                    new_styles.insert(
 9673                        *block_id,
 9674                        (
 9675                            None,
 9676                            diagnostic_block_renderer(diagnostic.clone(), is_valid),
 9677                        ),
 9678                    );
 9679                }
 9680                self.display_map.update(cx, |display_map, cx| {
 9681                    display_map.replace_blocks(new_styles, cx)
 9682                });
 9683            }
 9684        }
 9685    }
 9686
 9687    fn activate_diagnostics(&mut self, group_id: usize, cx: &mut ViewContext<Self>) -> bool {
 9688        self.dismiss_diagnostics(cx);
 9689        let snapshot = self.snapshot(cx);
 9690        self.active_diagnostics = self.display_map.update(cx, |display_map, cx| {
 9691            let buffer = self.buffer.read(cx).snapshot(cx);
 9692
 9693            let mut primary_range = None;
 9694            let mut primary_message = None;
 9695            let mut group_end = Point::zero();
 9696            let diagnostic_group = buffer
 9697                .diagnostic_group::<MultiBufferPoint>(group_id)
 9698                .filter_map(|entry| {
 9699                    if snapshot.is_line_folded(MultiBufferRow(entry.range.start.row))
 9700                        && (entry.range.start.row == entry.range.end.row
 9701                            || snapshot.is_line_folded(MultiBufferRow(entry.range.end.row)))
 9702                    {
 9703                        return None;
 9704                    }
 9705                    if entry.range.end > group_end {
 9706                        group_end = entry.range.end;
 9707                    }
 9708                    if entry.diagnostic.is_primary {
 9709                        primary_range = Some(entry.range.clone());
 9710                        primary_message = Some(entry.diagnostic.message.clone());
 9711                    }
 9712                    Some(entry)
 9713                })
 9714                .collect::<Vec<_>>();
 9715            let primary_range = primary_range?;
 9716            let primary_message = primary_message?;
 9717            let primary_range =
 9718                buffer.anchor_after(primary_range.start)..buffer.anchor_before(primary_range.end);
 9719
 9720            let blocks = display_map
 9721                .insert_blocks(
 9722                    diagnostic_group.iter().map(|entry| {
 9723                        let diagnostic = entry.diagnostic.clone();
 9724                        let message_height = diagnostic.message.matches('\n').count() as u8 + 1;
 9725                        BlockProperties {
 9726                            style: BlockStyle::Fixed,
 9727                            position: buffer.anchor_after(entry.range.start),
 9728                            height: message_height,
 9729                            render: diagnostic_block_renderer(diagnostic, true),
 9730                            disposition: BlockDisposition::Below,
 9731                        }
 9732                    }),
 9733                    cx,
 9734                )
 9735                .into_iter()
 9736                .zip(diagnostic_group.into_iter().map(|entry| entry.diagnostic))
 9737                .collect();
 9738
 9739            Some(ActiveDiagnosticGroup {
 9740                primary_range,
 9741                primary_message,
 9742                group_id,
 9743                blocks,
 9744                is_valid: true,
 9745            })
 9746        });
 9747        self.active_diagnostics.is_some()
 9748    }
 9749
 9750    fn dismiss_diagnostics(&mut self, cx: &mut ViewContext<Self>) {
 9751        if let Some(active_diagnostic_group) = self.active_diagnostics.take() {
 9752            self.display_map.update(cx, |display_map, cx| {
 9753                display_map.remove_blocks(active_diagnostic_group.blocks.into_keys().collect(), cx);
 9754            });
 9755            cx.notify();
 9756        }
 9757    }
 9758
 9759    pub fn set_selections_from_remote(
 9760        &mut self,
 9761        selections: Vec<Selection<Anchor>>,
 9762        pending_selection: Option<Selection<Anchor>>,
 9763        cx: &mut ViewContext<Self>,
 9764    ) {
 9765        let old_cursor_position = self.selections.newest_anchor().head();
 9766        self.selections.change_with(cx, |s| {
 9767            s.select_anchors(selections);
 9768            if let Some(pending_selection) = pending_selection {
 9769                s.set_pending(pending_selection, SelectMode::Character);
 9770            } else {
 9771                s.clear_pending();
 9772            }
 9773        });
 9774        self.selections_did_change(false, &old_cursor_position, true, cx);
 9775    }
 9776
 9777    fn push_to_selection_history(&mut self) {
 9778        self.selection_history.push(SelectionHistoryEntry {
 9779            selections: self.selections.disjoint_anchors(),
 9780            select_next_state: self.select_next_state.clone(),
 9781            select_prev_state: self.select_prev_state.clone(),
 9782            add_selections_state: self.add_selections_state.clone(),
 9783        });
 9784    }
 9785
 9786    pub fn transact(
 9787        &mut self,
 9788        cx: &mut ViewContext<Self>,
 9789        update: impl FnOnce(&mut Self, &mut ViewContext<Self>),
 9790    ) -> Option<TransactionId> {
 9791        self.start_transaction_at(Instant::now(), cx);
 9792        update(self, cx);
 9793        self.end_transaction_at(Instant::now(), cx)
 9794    }
 9795
 9796    fn start_transaction_at(&mut self, now: Instant, cx: &mut ViewContext<Self>) {
 9797        self.end_selection(cx);
 9798        if let Some(tx_id) = self
 9799            .buffer
 9800            .update(cx, |buffer, cx| buffer.start_transaction_at(now, cx))
 9801        {
 9802            self.selection_history
 9803                .insert_transaction(tx_id, self.selections.disjoint_anchors());
 9804            cx.emit(EditorEvent::TransactionBegun {
 9805                transaction_id: tx_id,
 9806            })
 9807        }
 9808    }
 9809
 9810    fn end_transaction_at(
 9811        &mut self,
 9812        now: Instant,
 9813        cx: &mut ViewContext<Self>,
 9814    ) -> Option<TransactionId> {
 9815        if let Some(transaction_id) = self
 9816            .buffer
 9817            .update(cx, |buffer, cx| buffer.end_transaction_at(now, cx))
 9818        {
 9819            if let Some((_, end_selections)) =
 9820                self.selection_history.transaction_mut(transaction_id)
 9821            {
 9822                *end_selections = Some(self.selections.disjoint_anchors());
 9823            } else {
 9824                log::error!("unexpectedly ended a transaction that wasn't started by this editor");
 9825            }
 9826
 9827            cx.emit(EditorEvent::Edited { transaction_id });
 9828            Some(transaction_id)
 9829        } else {
 9830            None
 9831        }
 9832    }
 9833
 9834    pub fn fold(&mut self, _: &actions::Fold, cx: &mut ViewContext<Self>) {
 9835        let mut fold_ranges = Vec::new();
 9836
 9837        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 9838
 9839        let selections = self.selections.all_adjusted(cx);
 9840        for selection in selections {
 9841            let range = selection.range().sorted();
 9842            let buffer_start_row = range.start.row;
 9843
 9844            for row in (0..=range.end.row).rev() {
 9845                if let Some((foldable_range, fold_text)) =
 9846                    display_map.foldable_range(MultiBufferRow(row))
 9847                {
 9848                    if foldable_range.end.row >= buffer_start_row {
 9849                        fold_ranges.push((foldable_range, fold_text));
 9850                        if row <= range.start.row {
 9851                            break;
 9852                        }
 9853                    }
 9854                }
 9855            }
 9856        }
 9857
 9858        self.fold_ranges(fold_ranges, true, cx);
 9859    }
 9860
 9861    pub fn fold_at(&mut self, fold_at: &FoldAt, cx: &mut ViewContext<Self>) {
 9862        let buffer_row = fold_at.buffer_row;
 9863        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 9864
 9865        if let Some((fold_range, placeholder)) = display_map.foldable_range(buffer_row) {
 9866            let autoscroll = self
 9867                .selections
 9868                .all::<Point>(cx)
 9869                .iter()
 9870                .any(|selection| fold_range.overlaps(&selection.range()));
 9871
 9872            self.fold_ranges([(fold_range, placeholder)], autoscroll, cx);
 9873        }
 9874    }
 9875
 9876    pub fn unfold_lines(&mut self, _: &UnfoldLines, cx: &mut ViewContext<Self>) {
 9877        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 9878        let buffer = &display_map.buffer_snapshot;
 9879        let selections = self.selections.all::<Point>(cx);
 9880        let ranges = selections
 9881            .iter()
 9882            .map(|s| {
 9883                let range = s.display_range(&display_map).sorted();
 9884                let mut start = range.start.to_point(&display_map);
 9885                let mut end = range.end.to_point(&display_map);
 9886                start.column = 0;
 9887                end.column = buffer.line_len(MultiBufferRow(end.row));
 9888                start..end
 9889            })
 9890            .collect::<Vec<_>>();
 9891
 9892        self.unfold_ranges(ranges, true, true, cx);
 9893    }
 9894
 9895    pub fn unfold_at(&mut self, unfold_at: &UnfoldAt, cx: &mut ViewContext<Self>) {
 9896        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 9897
 9898        let intersection_range = Point::new(unfold_at.buffer_row.0, 0)
 9899            ..Point::new(
 9900                unfold_at.buffer_row.0,
 9901                display_map.buffer_snapshot.line_len(unfold_at.buffer_row),
 9902            );
 9903
 9904        let autoscroll = self
 9905            .selections
 9906            .all::<Point>(cx)
 9907            .iter()
 9908            .any(|selection| selection.range().overlaps(&intersection_range));
 9909
 9910        self.unfold_ranges(std::iter::once(intersection_range), true, autoscroll, cx)
 9911    }
 9912
 9913    pub fn fold_selected_ranges(&mut self, _: &FoldSelectedRanges, cx: &mut ViewContext<Self>) {
 9914        let selections = self.selections.all::<Point>(cx);
 9915        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
 9916        let line_mode = self.selections.line_mode;
 9917        let ranges = selections.into_iter().map(|s| {
 9918            if line_mode {
 9919                let start = Point::new(s.start.row, 0);
 9920                let end = Point::new(
 9921                    s.end.row,
 9922                    display_map
 9923                        .buffer_snapshot
 9924                        .line_len(MultiBufferRow(s.end.row)),
 9925                );
 9926                (start..end, display_map.fold_placeholder.clone())
 9927            } else {
 9928                (s.start..s.end, display_map.fold_placeholder.clone())
 9929            }
 9930        });
 9931        self.fold_ranges(ranges, true, cx);
 9932    }
 9933
 9934    pub fn fold_ranges<T: ToOffset + Clone>(
 9935        &mut self,
 9936        ranges: impl IntoIterator<Item = (Range<T>, FoldPlaceholder)>,
 9937        auto_scroll: bool,
 9938        cx: &mut ViewContext<Self>,
 9939    ) {
 9940        let mut fold_ranges = Vec::new();
 9941        let mut buffers_affected = HashMap::default();
 9942        let multi_buffer = self.buffer().read(cx);
 9943        for (fold_range, fold_text) in ranges {
 9944            if let Some((_, buffer, _)) =
 9945                multi_buffer.excerpt_containing(fold_range.start.clone(), cx)
 9946            {
 9947                buffers_affected.insert(buffer.read(cx).remote_id(), buffer);
 9948            };
 9949            fold_ranges.push((fold_range, fold_text));
 9950        }
 9951
 9952        let mut ranges = fold_ranges.into_iter().peekable();
 9953        if ranges.peek().is_some() {
 9954            self.display_map.update(cx, |map, cx| map.fold(ranges, cx));
 9955
 9956            if auto_scroll {
 9957                self.request_autoscroll(Autoscroll::fit(), cx);
 9958            }
 9959
 9960            for buffer in buffers_affected.into_values() {
 9961                self.sync_expanded_diff_hunks(buffer, cx);
 9962            }
 9963
 9964            cx.notify();
 9965
 9966            if let Some(active_diagnostics) = self.active_diagnostics.take() {
 9967                // Clear diagnostics block when folding a range that contains it.
 9968                let snapshot = self.snapshot(cx);
 9969                if snapshot.intersects_fold(active_diagnostics.primary_range.start) {
 9970                    drop(snapshot);
 9971                    self.active_diagnostics = Some(active_diagnostics);
 9972                    self.dismiss_diagnostics(cx);
 9973                } else {
 9974                    self.active_diagnostics = Some(active_diagnostics);
 9975                }
 9976            }
 9977
 9978            self.scrollbar_marker_state.dirty = true;
 9979        }
 9980    }
 9981
 9982    pub fn unfold_ranges<T: ToOffset + Clone>(
 9983        &mut self,
 9984        ranges: impl IntoIterator<Item = Range<T>>,
 9985        inclusive: bool,
 9986        auto_scroll: bool,
 9987        cx: &mut ViewContext<Self>,
 9988    ) {
 9989        let mut unfold_ranges = Vec::new();
 9990        let mut buffers_affected = HashMap::default();
 9991        let multi_buffer = self.buffer().read(cx);
 9992        for range in ranges {
 9993            if let Some((_, buffer, _)) = multi_buffer.excerpt_containing(range.start.clone(), cx) {
 9994                buffers_affected.insert(buffer.read(cx).remote_id(), buffer);
 9995            };
 9996            unfold_ranges.push(range);
 9997        }
 9998
 9999        let mut ranges = unfold_ranges.into_iter().peekable();
10000        if ranges.peek().is_some() {
10001            self.display_map
10002                .update(cx, |map, cx| map.unfold(ranges, inclusive, cx));
10003            if auto_scroll {
10004                self.request_autoscroll(Autoscroll::fit(), cx);
10005            }
10006
10007            for buffer in buffers_affected.into_values() {
10008                self.sync_expanded_diff_hunks(buffer, cx);
10009            }
10010
10011            cx.notify();
10012            self.scrollbar_marker_state.dirty = true;
10013            self.active_indent_guides_state.dirty = true;
10014        }
10015    }
10016
10017    pub fn set_gutter_hovered(&mut self, hovered: bool, cx: &mut ViewContext<Self>) {
10018        if hovered != self.gutter_hovered {
10019            self.gutter_hovered = hovered;
10020            cx.notify();
10021        }
10022    }
10023
10024    pub fn insert_blocks(
10025        &mut self,
10026        blocks: impl IntoIterator<Item = BlockProperties<Anchor>>,
10027        autoscroll: Option<Autoscroll>,
10028        cx: &mut ViewContext<Self>,
10029    ) -> Vec<BlockId> {
10030        let blocks = self
10031            .display_map
10032            .update(cx, |display_map, cx| display_map.insert_blocks(blocks, cx));
10033        if let Some(autoscroll) = autoscroll {
10034            self.request_autoscroll(autoscroll, cx);
10035        }
10036        blocks
10037    }
10038
10039    pub fn replace_blocks(
10040        &mut self,
10041        blocks: HashMap<BlockId, (Option<u8>, RenderBlock)>,
10042        autoscroll: Option<Autoscroll>,
10043        cx: &mut ViewContext<Self>,
10044    ) {
10045        self.display_map
10046            .update(cx, |display_map, cx| display_map.replace_blocks(blocks, cx));
10047        if let Some(autoscroll) = autoscroll {
10048            self.request_autoscroll(autoscroll, cx);
10049        }
10050    }
10051
10052    pub fn remove_blocks(
10053        &mut self,
10054        block_ids: HashSet<BlockId>,
10055        autoscroll: Option<Autoscroll>,
10056        cx: &mut ViewContext<Self>,
10057    ) {
10058        self.display_map.update(cx, |display_map, cx| {
10059            display_map.remove_blocks(block_ids, cx)
10060        });
10061        if let Some(autoscroll) = autoscroll {
10062            self.request_autoscroll(autoscroll, cx);
10063        }
10064    }
10065
10066    pub fn row_for_block(
10067        &self,
10068        block_id: BlockId,
10069        cx: &mut ViewContext<Self>,
10070    ) -> Option<DisplayRow> {
10071        self.display_map
10072            .update(cx, |map, cx| map.row_for_block(block_id, cx))
10073    }
10074
10075    pub fn insert_creases(
10076        &mut self,
10077        creases: impl IntoIterator<Item = Crease>,
10078        cx: &mut ViewContext<Self>,
10079    ) -> Vec<CreaseId> {
10080        self.display_map
10081            .update(cx, |map, cx| map.insert_creases(creases, cx))
10082    }
10083
10084    pub fn remove_creases(
10085        &mut self,
10086        ids: impl IntoIterator<Item = CreaseId>,
10087        cx: &mut ViewContext<Self>,
10088    ) {
10089        self.display_map
10090            .update(cx, |map, cx| map.remove_creases(ids, cx));
10091    }
10092
10093    pub fn longest_row(&self, cx: &mut AppContext) -> DisplayRow {
10094        self.display_map
10095            .update(cx, |map, cx| map.snapshot(cx))
10096            .longest_row()
10097    }
10098
10099    pub fn max_point(&self, cx: &mut AppContext) -> DisplayPoint {
10100        self.display_map
10101            .update(cx, |map, cx| map.snapshot(cx))
10102            .max_point()
10103    }
10104
10105    pub fn text(&self, cx: &AppContext) -> String {
10106        self.buffer.read(cx).read(cx).text()
10107    }
10108
10109    pub fn text_option(&self, cx: &AppContext) -> Option<String> {
10110        let text = self.text(cx);
10111        let text = text.trim();
10112
10113        if text.is_empty() {
10114            return None;
10115        }
10116
10117        Some(text.to_string())
10118    }
10119
10120    pub fn set_text(&mut self, text: impl Into<Arc<str>>, cx: &mut ViewContext<Self>) {
10121        self.transact(cx, |this, cx| {
10122            this.buffer
10123                .read(cx)
10124                .as_singleton()
10125                .expect("you can only call set_text on editors for singleton buffers")
10126                .update(cx, |buffer, cx| buffer.set_text(text, cx));
10127        });
10128    }
10129
10130    pub fn display_text(&self, cx: &mut AppContext) -> String {
10131        self.display_map
10132            .update(cx, |map, cx| map.snapshot(cx))
10133            .text()
10134    }
10135
10136    pub fn wrap_guides(&self, cx: &AppContext) -> SmallVec<[(usize, bool); 2]> {
10137        let mut wrap_guides = smallvec::smallvec![];
10138
10139        if self.show_wrap_guides == Some(false) {
10140            return wrap_guides;
10141        }
10142
10143        let settings = self.buffer.read(cx).settings_at(0, cx);
10144        if settings.show_wrap_guides {
10145            if let SoftWrap::Column(soft_wrap) = self.soft_wrap_mode(cx) {
10146                wrap_guides.push((soft_wrap as usize, true));
10147            }
10148            wrap_guides.extend(settings.wrap_guides.iter().map(|guide| (*guide, false)))
10149        }
10150
10151        wrap_guides
10152    }
10153
10154    pub fn soft_wrap_mode(&self, cx: &AppContext) -> SoftWrap {
10155        let settings = self.buffer.read(cx).settings_at(0, cx);
10156        let mode = self
10157            .soft_wrap_mode_override
10158            .unwrap_or_else(|| settings.soft_wrap);
10159        match mode {
10160            language_settings::SoftWrap::None => SoftWrap::None,
10161            language_settings::SoftWrap::PreferLine => SoftWrap::PreferLine,
10162            language_settings::SoftWrap::EditorWidth => SoftWrap::EditorWidth,
10163            language_settings::SoftWrap::PreferredLineLength => {
10164                SoftWrap::Column(settings.preferred_line_length)
10165            }
10166        }
10167    }
10168
10169    pub fn set_soft_wrap_mode(
10170        &mut self,
10171        mode: language_settings::SoftWrap,
10172        cx: &mut ViewContext<Self>,
10173    ) {
10174        self.soft_wrap_mode_override = Some(mode);
10175        cx.notify();
10176    }
10177
10178    pub fn set_style(&mut self, style: EditorStyle, cx: &mut ViewContext<Self>) {
10179        let rem_size = cx.rem_size();
10180        self.display_map.update(cx, |map, cx| {
10181            map.set_font(
10182                style.text.font(),
10183                style.text.font_size.to_pixels(rem_size),
10184                cx,
10185            )
10186        });
10187        self.style = Some(style);
10188    }
10189
10190    pub fn style(&self) -> Option<&EditorStyle> {
10191        self.style.as_ref()
10192    }
10193
10194    // Called by the element. This method is not designed to be called outside of the editor
10195    // element's layout code because it does not notify when rewrapping is computed synchronously.
10196    pub(crate) fn set_wrap_width(&self, width: Option<Pixels>, cx: &mut AppContext) -> bool {
10197        self.display_map
10198            .update(cx, |map, cx| map.set_wrap_width(width, cx))
10199    }
10200
10201    pub fn toggle_soft_wrap(&mut self, _: &ToggleSoftWrap, cx: &mut ViewContext<Self>) {
10202        if self.soft_wrap_mode_override.is_some() {
10203            self.soft_wrap_mode_override.take();
10204        } else {
10205            let soft_wrap = match self.soft_wrap_mode(cx) {
10206                SoftWrap::None | SoftWrap::PreferLine => language_settings::SoftWrap::EditorWidth,
10207                SoftWrap::EditorWidth | SoftWrap::Column(_) => {
10208                    language_settings::SoftWrap::PreferLine
10209                }
10210            };
10211            self.soft_wrap_mode_override = Some(soft_wrap);
10212        }
10213        cx.notify();
10214    }
10215
10216    pub fn toggle_tab_bar(&mut self, _: &ToggleTabBar, cx: &mut ViewContext<Self>) {
10217        let Some(workspace) = self.workspace() else {
10218            return;
10219        };
10220        let fs = workspace.read(cx).app_state().fs.clone();
10221        let current_show = TabBarSettings::get_global(cx).show;
10222        update_settings_file::<TabBarSettings>(fs, cx, move |setting| {
10223            setting.show = Some(!current_show);
10224        });
10225    }
10226
10227    pub fn toggle_indent_guides(&mut self, _: &ToggleIndentGuides, cx: &mut ViewContext<Self>) {
10228        let currently_enabled = self.should_show_indent_guides().unwrap_or_else(|| {
10229            self.buffer
10230                .read(cx)
10231                .settings_at(0, cx)
10232                .indent_guides
10233                .enabled
10234        });
10235        self.show_indent_guides = Some(!currently_enabled);
10236        cx.notify();
10237    }
10238
10239    fn should_show_indent_guides(&self) -> Option<bool> {
10240        self.show_indent_guides
10241    }
10242
10243    pub fn toggle_line_numbers(&mut self, _: &ToggleLineNumbers, cx: &mut ViewContext<Self>) {
10244        let mut editor_settings = EditorSettings::get_global(cx).clone();
10245        editor_settings.gutter.line_numbers = !editor_settings.gutter.line_numbers;
10246        EditorSettings::override_global(editor_settings, cx);
10247    }
10248
10249    pub fn set_show_gutter(&mut self, show_gutter: bool, cx: &mut ViewContext<Self>) {
10250        self.show_gutter = show_gutter;
10251        cx.notify();
10252    }
10253
10254    pub fn set_show_line_numbers(&mut self, show_line_numbers: bool, cx: &mut ViewContext<Self>) {
10255        self.show_line_numbers = Some(show_line_numbers);
10256        cx.notify();
10257    }
10258
10259    pub fn set_show_git_diff_gutter(
10260        &mut self,
10261        show_git_diff_gutter: bool,
10262        cx: &mut ViewContext<Self>,
10263    ) {
10264        self.show_git_diff_gutter = Some(show_git_diff_gutter);
10265        cx.notify();
10266    }
10267
10268    pub fn set_show_code_actions(&mut self, show_code_actions: bool, cx: &mut ViewContext<Self>) {
10269        self.show_code_actions = Some(show_code_actions);
10270        cx.notify();
10271    }
10272
10273    pub fn set_show_runnables(&mut self, show_runnables: bool, cx: &mut ViewContext<Self>) {
10274        self.show_runnables = Some(show_runnables);
10275        cx.notify();
10276    }
10277
10278    pub fn set_show_wrap_guides(&mut self, show_wrap_guides: bool, cx: &mut ViewContext<Self>) {
10279        self.show_wrap_guides = Some(show_wrap_guides);
10280        cx.notify();
10281    }
10282
10283    pub fn set_show_indent_guides(&mut self, show_indent_guides: bool, cx: &mut ViewContext<Self>) {
10284        self.show_indent_guides = Some(show_indent_guides);
10285        cx.notify();
10286    }
10287
10288    pub fn reveal_in_finder(&mut self, _: &RevealInFinder, cx: &mut ViewContext<Self>) {
10289        if let Some(buffer) = self.buffer().read(cx).as_singleton() {
10290            if let Some(file) = buffer.read(cx).file().and_then(|f| f.as_local()) {
10291                cx.reveal_path(&file.abs_path(cx));
10292            }
10293        }
10294    }
10295
10296    pub fn copy_path(&mut self, _: &CopyPath, cx: &mut ViewContext<Self>) {
10297        if let Some(buffer) = self.buffer().read(cx).as_singleton() {
10298            if let Some(file) = buffer.read(cx).file().and_then(|f| f.as_local()) {
10299                if let Some(path) = file.abs_path(cx).to_str() {
10300                    cx.write_to_clipboard(ClipboardItem::new(path.to_string()));
10301                }
10302            }
10303        }
10304    }
10305
10306    pub fn copy_relative_path(&mut self, _: &CopyRelativePath, cx: &mut ViewContext<Self>) {
10307        if let Some(buffer) = self.buffer().read(cx).as_singleton() {
10308            if let Some(file) = buffer.read(cx).file().and_then(|f| f.as_local()) {
10309                if let Some(path) = file.path().to_str() {
10310                    cx.write_to_clipboard(ClipboardItem::new(path.to_string()));
10311                }
10312            }
10313        }
10314    }
10315
10316    pub fn toggle_git_blame(&mut self, _: &ToggleGitBlame, cx: &mut ViewContext<Self>) {
10317        self.show_git_blame_gutter = !self.show_git_blame_gutter;
10318
10319        if self.show_git_blame_gutter && !self.has_blame_entries(cx) {
10320            self.start_git_blame(true, cx);
10321        }
10322
10323        cx.notify();
10324    }
10325
10326    pub fn toggle_git_blame_inline(
10327        &mut self,
10328        _: &ToggleGitBlameInline,
10329        cx: &mut ViewContext<Self>,
10330    ) {
10331        self.toggle_git_blame_inline_internal(true, cx);
10332        cx.notify();
10333    }
10334
10335    pub fn git_blame_inline_enabled(&self) -> bool {
10336        self.git_blame_inline_enabled
10337    }
10338
10339    pub fn toggle_selection_menu(&mut self, _: &ToggleSelectionMenu, cx: &mut ViewContext<Self>) {
10340        self.show_selection_menu = self
10341            .show_selection_menu
10342            .map(|show_selections_menu| !show_selections_menu)
10343            .or_else(|| Some(!EditorSettings::get_global(cx).toolbar.selections_menu));
10344
10345        cx.notify();
10346    }
10347
10348    pub fn selection_menu_enabled(&self, cx: &AppContext) -> bool {
10349        self.show_selection_menu
10350            .unwrap_or_else(|| EditorSettings::get_global(cx).toolbar.selections_menu)
10351    }
10352
10353    fn start_git_blame(&mut self, user_triggered: bool, cx: &mut ViewContext<Self>) {
10354        if let Some(project) = self.project.as_ref() {
10355            let Some(buffer) = self.buffer().read(cx).as_singleton() else {
10356                return;
10357            };
10358
10359            if buffer.read(cx).file().is_none() {
10360                return;
10361            }
10362
10363            let focused = self.focus_handle(cx).contains_focused(cx);
10364
10365            let project = project.clone();
10366            let blame =
10367                cx.new_model(|cx| GitBlame::new(buffer, project, user_triggered, focused, cx));
10368            self.blame_subscription = Some(cx.observe(&blame, |_, _, cx| cx.notify()));
10369            self.blame = Some(blame);
10370        }
10371    }
10372
10373    fn toggle_git_blame_inline_internal(
10374        &mut self,
10375        user_triggered: bool,
10376        cx: &mut ViewContext<Self>,
10377    ) {
10378        if self.git_blame_inline_enabled {
10379            self.git_blame_inline_enabled = false;
10380            self.show_git_blame_inline = false;
10381            self.show_git_blame_inline_delay_task.take();
10382        } else {
10383            self.git_blame_inline_enabled = true;
10384            self.start_git_blame_inline(user_triggered, cx);
10385        }
10386
10387        cx.notify();
10388    }
10389
10390    fn start_git_blame_inline(&mut self, user_triggered: bool, cx: &mut ViewContext<Self>) {
10391        self.start_git_blame(user_triggered, cx);
10392
10393        if ProjectSettings::get_global(cx)
10394            .git
10395            .inline_blame_delay()
10396            .is_some()
10397        {
10398            self.start_inline_blame_timer(cx);
10399        } else {
10400            self.show_git_blame_inline = true
10401        }
10402    }
10403
10404    pub fn blame(&self) -> Option<&Model<GitBlame>> {
10405        self.blame.as_ref()
10406    }
10407
10408    pub fn render_git_blame_gutter(&mut self, cx: &mut WindowContext) -> bool {
10409        self.show_git_blame_gutter && self.has_blame_entries(cx)
10410    }
10411
10412    pub fn render_git_blame_inline(&mut self, cx: &mut WindowContext) -> bool {
10413        self.show_git_blame_inline
10414            && self.focus_handle.is_focused(cx)
10415            && !self.newest_selection_head_on_empty_line(cx)
10416            && self.has_blame_entries(cx)
10417    }
10418
10419    fn has_blame_entries(&self, cx: &mut WindowContext) -> bool {
10420        self.blame()
10421            .map_or(false, |blame| blame.read(cx).has_generated_entries())
10422    }
10423
10424    fn newest_selection_head_on_empty_line(&mut self, cx: &mut WindowContext) -> bool {
10425        let cursor_anchor = self.selections.newest_anchor().head();
10426
10427        let snapshot = self.buffer.read(cx).snapshot(cx);
10428        let buffer_row = MultiBufferRow(cursor_anchor.to_point(&snapshot).row);
10429
10430        snapshot.line_len(buffer_row) == 0
10431    }
10432
10433    fn get_permalink_to_line(&mut self, cx: &mut ViewContext<Self>) -> Result<url::Url> {
10434        let (path, selection, repo) = maybe!({
10435            let project_handle = self.project.as_ref()?.clone();
10436            let project = project_handle.read(cx);
10437
10438            let selection = self.selections.newest::<Point>(cx);
10439            let selection_range = selection.range();
10440
10441            let (buffer, selection) = if let Some(buffer) = self.buffer().read(cx).as_singleton() {
10442                (buffer, selection_range.start.row..selection_range.end.row)
10443            } else {
10444                let buffer_ranges = self
10445                    .buffer()
10446                    .read(cx)
10447                    .range_to_buffer_ranges(selection_range, cx);
10448
10449                let (buffer, range, _) = if selection.reversed {
10450                    buffer_ranges.first()
10451                } else {
10452                    buffer_ranges.last()
10453                }?;
10454
10455                let snapshot = buffer.read(cx).snapshot();
10456                let selection = text::ToPoint::to_point(&range.start, &snapshot).row
10457                    ..text::ToPoint::to_point(&range.end, &snapshot).row;
10458                (buffer.clone(), selection)
10459            };
10460
10461            let path = buffer
10462                .read(cx)
10463                .file()?
10464                .as_local()?
10465                .path()
10466                .to_str()?
10467                .to_string();
10468            let repo = project.get_repo(&buffer.read(cx).project_path(cx)?, cx)?;
10469            Some((path, selection, repo))
10470        })
10471        .ok_or_else(|| anyhow!("unable to open git repository"))?;
10472
10473        const REMOTE_NAME: &str = "origin";
10474        let origin_url = repo
10475            .remote_url(REMOTE_NAME)
10476            .ok_or_else(|| anyhow!("remote \"{REMOTE_NAME}\" not found"))?;
10477        let sha = repo
10478            .head_sha()
10479            .ok_or_else(|| anyhow!("failed to read HEAD SHA"))?;
10480
10481        let (provider, remote) =
10482            parse_git_remote_url(GitHostingProviderRegistry::default_global(cx), &origin_url)
10483                .ok_or_else(|| anyhow!("failed to parse Git remote URL"))?;
10484
10485        Ok(provider.build_permalink(
10486            remote,
10487            BuildPermalinkParams {
10488                sha: &sha,
10489                path: &path,
10490                selection: Some(selection),
10491            },
10492        ))
10493    }
10494
10495    pub fn copy_permalink_to_line(&mut self, _: &CopyPermalinkToLine, cx: &mut ViewContext<Self>) {
10496        let permalink = self.get_permalink_to_line(cx);
10497
10498        match permalink {
10499            Ok(permalink) => {
10500                cx.write_to_clipboard(ClipboardItem::new(permalink.to_string()));
10501            }
10502            Err(err) => {
10503                let message = format!("Failed to copy permalink: {err}");
10504
10505                Err::<(), anyhow::Error>(err).log_err();
10506
10507                if let Some(workspace) = self.workspace() {
10508                    workspace.update(cx, |workspace, cx| {
10509                        struct CopyPermalinkToLine;
10510
10511                        workspace.show_toast(
10512                            Toast::new(NotificationId::unique::<CopyPermalinkToLine>(), message),
10513                            cx,
10514                        )
10515                    })
10516                }
10517            }
10518        }
10519    }
10520
10521    pub fn open_permalink_to_line(&mut self, _: &OpenPermalinkToLine, cx: &mut ViewContext<Self>) {
10522        let permalink = self.get_permalink_to_line(cx);
10523
10524        match permalink {
10525            Ok(permalink) => {
10526                cx.open_url(permalink.as_ref());
10527            }
10528            Err(err) => {
10529                let message = format!("Failed to open permalink: {err}");
10530
10531                Err::<(), anyhow::Error>(err).log_err();
10532
10533                if let Some(workspace) = self.workspace() {
10534                    workspace.update(cx, |workspace, cx| {
10535                        struct OpenPermalinkToLine;
10536
10537                        workspace.show_toast(
10538                            Toast::new(NotificationId::unique::<OpenPermalinkToLine>(), message),
10539                            cx,
10540                        )
10541                    })
10542                }
10543            }
10544        }
10545    }
10546
10547    /// Adds or removes (on `None` color) a highlight for the rows corresponding to the anchor range given.
10548    /// On matching anchor range, replaces the old highlight; does not clear the other existing highlights.
10549    /// If multiple anchor ranges will produce highlights for the same row, the last range added will be used.
10550    pub fn highlight_rows<T: 'static>(
10551        &mut self,
10552        rows: RangeInclusive<Anchor>,
10553        color: Option<Hsla>,
10554        should_autoscroll: bool,
10555        cx: &mut ViewContext<Self>,
10556    ) {
10557        let snapshot = self.buffer().read(cx).snapshot(cx);
10558        let row_highlights = self.highlighted_rows.entry(TypeId::of::<T>()).or_default();
10559        let existing_highlight_index = row_highlights.binary_search_by(|highlight| {
10560            highlight
10561                .range
10562                .start()
10563                .cmp(&rows.start(), &snapshot)
10564                .then(highlight.range.end().cmp(&rows.end(), &snapshot))
10565        });
10566        match (color, existing_highlight_index) {
10567            (Some(_), Ok(ix)) | (_, Err(ix)) => row_highlights.insert(
10568                ix,
10569                RowHighlight {
10570                    index: post_inc(&mut self.highlight_order),
10571                    range: rows,
10572                    should_autoscroll,
10573                    color,
10574                },
10575            ),
10576            (None, Ok(i)) => {
10577                row_highlights.remove(i);
10578            }
10579        }
10580    }
10581
10582    /// Clear all anchor ranges for a certain highlight context type, so no corresponding rows will be highlighted.
10583    pub fn clear_row_highlights<T: 'static>(&mut self) {
10584        self.highlighted_rows.remove(&TypeId::of::<T>());
10585    }
10586
10587    /// For a highlight given context type, gets all anchor ranges that will be used for row highlighting.
10588    pub fn highlighted_rows<T: 'static>(
10589        &self,
10590    ) -> Option<impl Iterator<Item = (&RangeInclusive<Anchor>, Option<&Hsla>)>> {
10591        Some(
10592            self.highlighted_rows
10593                .get(&TypeId::of::<T>())?
10594                .iter()
10595                .map(|highlight| (&highlight.range, highlight.color.as_ref())),
10596        )
10597    }
10598
10599    /// Merges all anchor ranges for all context types ever set, picking the last highlight added in case of a row conflict.
10600    /// Rerturns a map of display rows that are highlighted and their corresponding highlight color.
10601    /// Allows to ignore certain kinds of highlights.
10602    pub fn highlighted_display_rows(
10603        &mut self,
10604        cx: &mut WindowContext,
10605    ) -> BTreeMap<DisplayRow, Hsla> {
10606        let snapshot = self.snapshot(cx);
10607        let mut used_highlight_orders = HashMap::default();
10608        self.highlighted_rows
10609            .iter()
10610            .flat_map(|(_, highlighted_rows)| highlighted_rows.iter())
10611            .fold(
10612                BTreeMap::<DisplayRow, Hsla>::new(),
10613                |mut unique_rows, highlight| {
10614                    let start_row = highlight.range.start().to_display_point(&snapshot).row();
10615                    let end_row = highlight.range.end().to_display_point(&snapshot).row();
10616                    for row in start_row.0..=end_row.0 {
10617                        let used_index =
10618                            used_highlight_orders.entry(row).or_insert(highlight.index);
10619                        if highlight.index >= *used_index {
10620                            *used_index = highlight.index;
10621                            match highlight.color {
10622                                Some(hsla) => unique_rows.insert(DisplayRow(row), hsla),
10623                                None => unique_rows.remove(&DisplayRow(row)),
10624                            };
10625                        }
10626                    }
10627                    unique_rows
10628                },
10629            )
10630    }
10631
10632    pub fn highlighted_display_row_for_autoscroll(
10633        &self,
10634        snapshot: &DisplaySnapshot,
10635    ) -> Option<DisplayRow> {
10636        self.highlighted_rows
10637            .values()
10638            .flat_map(|highlighted_rows| highlighted_rows.iter())
10639            .filter_map(|highlight| {
10640                if highlight.color.is_none() || !highlight.should_autoscroll {
10641                    return None;
10642                }
10643                Some(highlight.range.start().to_display_point(&snapshot).row())
10644            })
10645            .min()
10646    }
10647
10648    pub fn set_search_within_ranges(
10649        &mut self,
10650        ranges: &[Range<Anchor>],
10651        cx: &mut ViewContext<Self>,
10652    ) {
10653        self.highlight_background::<SearchWithinRange>(
10654            ranges,
10655            |colors| colors.editor_document_highlight_read_background,
10656            cx,
10657        )
10658    }
10659
10660    pub fn set_breadcrumb_header(&mut self, new_header: String) {
10661        self.breadcrumb_header = Some(new_header);
10662    }
10663
10664    pub fn clear_search_within_ranges(&mut self, cx: &mut ViewContext<Self>) {
10665        self.clear_background_highlights::<SearchWithinRange>(cx);
10666    }
10667
10668    pub fn highlight_background<T: 'static>(
10669        &mut self,
10670        ranges: &[Range<Anchor>],
10671        color_fetcher: fn(&ThemeColors) -> Hsla,
10672        cx: &mut ViewContext<Self>,
10673    ) {
10674        let snapshot = self.snapshot(cx);
10675        // this is to try and catch a panic sooner
10676        for range in ranges {
10677            snapshot
10678                .buffer_snapshot
10679                .summary_for_anchor::<usize>(&range.start);
10680            snapshot
10681                .buffer_snapshot
10682                .summary_for_anchor::<usize>(&range.end);
10683        }
10684
10685        self.background_highlights
10686            .insert(TypeId::of::<T>(), (color_fetcher, Arc::from(ranges)));
10687        self.scrollbar_marker_state.dirty = true;
10688        cx.notify();
10689    }
10690
10691    pub fn clear_background_highlights<T: 'static>(
10692        &mut self,
10693        cx: &mut ViewContext<Self>,
10694    ) -> Option<BackgroundHighlight> {
10695        let text_highlights = self.background_highlights.remove(&TypeId::of::<T>())?;
10696        if !text_highlights.1.is_empty() {
10697            self.scrollbar_marker_state.dirty = true;
10698            cx.notify();
10699        }
10700        Some(text_highlights)
10701    }
10702
10703    pub fn highlight_gutter<T: 'static>(
10704        &mut self,
10705        ranges: &[Range<Anchor>],
10706        color_fetcher: fn(&AppContext) -> Hsla,
10707        cx: &mut ViewContext<Self>,
10708    ) {
10709        self.gutter_highlights
10710            .insert(TypeId::of::<T>(), (color_fetcher, Arc::from(ranges)));
10711        cx.notify();
10712    }
10713
10714    pub fn clear_gutter_highlights<T: 'static>(
10715        &mut self,
10716        cx: &mut ViewContext<Self>,
10717    ) -> Option<GutterHighlight> {
10718        cx.notify();
10719        self.gutter_highlights.remove(&TypeId::of::<T>())
10720    }
10721
10722    #[cfg(feature = "test-support")]
10723    pub fn all_text_background_highlights(
10724        &mut self,
10725        cx: &mut ViewContext<Self>,
10726    ) -> Vec<(Range<DisplayPoint>, Hsla)> {
10727        let snapshot = self.snapshot(cx);
10728        let buffer = &snapshot.buffer_snapshot;
10729        let start = buffer.anchor_before(0);
10730        let end = buffer.anchor_after(buffer.len());
10731        let theme = cx.theme().colors();
10732        self.background_highlights_in_range(start..end, &snapshot, theme)
10733    }
10734
10735    #[cfg(feature = "test-support")]
10736    pub fn search_background_highlights(
10737        &mut self,
10738        cx: &mut ViewContext<Self>,
10739    ) -> Vec<Range<Point>> {
10740        let snapshot = self.buffer().read(cx).snapshot(cx);
10741
10742        let highlights = self
10743            .background_highlights
10744            .get(&TypeId::of::<items::BufferSearchHighlights>());
10745
10746        if let Some((_color, ranges)) = highlights {
10747            ranges
10748                .iter()
10749                .map(|range| range.start.to_point(&snapshot)..range.end.to_point(&snapshot))
10750                .collect_vec()
10751        } else {
10752            vec![]
10753        }
10754    }
10755
10756    fn document_highlights_for_position<'a>(
10757        &'a self,
10758        position: Anchor,
10759        buffer: &'a MultiBufferSnapshot,
10760    ) -> impl 'a + Iterator<Item = &Range<Anchor>> {
10761        let read_highlights = self
10762            .background_highlights
10763            .get(&TypeId::of::<DocumentHighlightRead>())
10764            .map(|h| &h.1);
10765        let write_highlights = self
10766            .background_highlights
10767            .get(&TypeId::of::<DocumentHighlightWrite>())
10768            .map(|h| &h.1);
10769        let left_position = position.bias_left(buffer);
10770        let right_position = position.bias_right(buffer);
10771        read_highlights
10772            .into_iter()
10773            .chain(write_highlights)
10774            .flat_map(move |ranges| {
10775                let start_ix = match ranges.binary_search_by(|probe| {
10776                    let cmp = probe.end.cmp(&left_position, buffer);
10777                    if cmp.is_ge() {
10778                        Ordering::Greater
10779                    } else {
10780                        Ordering::Less
10781                    }
10782                }) {
10783                    Ok(i) | Err(i) => i,
10784                };
10785
10786                ranges[start_ix..]
10787                    .iter()
10788                    .take_while(move |range| range.start.cmp(&right_position, buffer).is_le())
10789            })
10790    }
10791
10792    pub fn has_background_highlights<T: 'static>(&self) -> bool {
10793        self.background_highlights
10794            .get(&TypeId::of::<T>())
10795            .map_or(false, |(_, highlights)| !highlights.is_empty())
10796    }
10797
10798    pub fn background_highlights_in_range(
10799        &self,
10800        search_range: Range<Anchor>,
10801        display_snapshot: &DisplaySnapshot,
10802        theme: &ThemeColors,
10803    ) -> Vec<(Range<DisplayPoint>, Hsla)> {
10804        let mut results = Vec::new();
10805        for (color_fetcher, ranges) in self.background_highlights.values() {
10806            let color = color_fetcher(theme);
10807            let start_ix = match ranges.binary_search_by(|probe| {
10808                let cmp = probe
10809                    .end
10810                    .cmp(&search_range.start, &display_snapshot.buffer_snapshot);
10811                if cmp.is_gt() {
10812                    Ordering::Greater
10813                } else {
10814                    Ordering::Less
10815                }
10816            }) {
10817                Ok(i) | Err(i) => i,
10818            };
10819            for range in &ranges[start_ix..] {
10820                if range
10821                    .start
10822                    .cmp(&search_range.end, &display_snapshot.buffer_snapshot)
10823                    .is_ge()
10824                {
10825                    break;
10826                }
10827
10828                let start = range.start.to_display_point(&display_snapshot);
10829                let end = range.end.to_display_point(&display_snapshot);
10830                results.push((start..end, color))
10831            }
10832        }
10833        results
10834    }
10835
10836    pub fn background_highlight_row_ranges<T: 'static>(
10837        &self,
10838        search_range: Range<Anchor>,
10839        display_snapshot: &DisplaySnapshot,
10840        count: usize,
10841    ) -> Vec<RangeInclusive<DisplayPoint>> {
10842        let mut results = Vec::new();
10843        let Some((_, ranges)) = self.background_highlights.get(&TypeId::of::<T>()) else {
10844            return vec![];
10845        };
10846
10847        let start_ix = match ranges.binary_search_by(|probe| {
10848            let cmp = probe
10849                .end
10850                .cmp(&search_range.start, &display_snapshot.buffer_snapshot);
10851            if cmp.is_gt() {
10852                Ordering::Greater
10853            } else {
10854                Ordering::Less
10855            }
10856        }) {
10857            Ok(i) | Err(i) => i,
10858        };
10859        let mut push_region = |start: Option<Point>, end: Option<Point>| {
10860            if let (Some(start_display), Some(end_display)) = (start, end) {
10861                results.push(
10862                    start_display.to_display_point(display_snapshot)
10863                        ..=end_display.to_display_point(display_snapshot),
10864                );
10865            }
10866        };
10867        let mut start_row: Option<Point> = None;
10868        let mut end_row: Option<Point> = None;
10869        if ranges.len() > count {
10870            return Vec::new();
10871        }
10872        for range in &ranges[start_ix..] {
10873            if range
10874                .start
10875                .cmp(&search_range.end, &display_snapshot.buffer_snapshot)
10876                .is_ge()
10877            {
10878                break;
10879            }
10880            let end = range.end.to_point(&display_snapshot.buffer_snapshot);
10881            if let Some(current_row) = &end_row {
10882                if end.row == current_row.row {
10883                    continue;
10884                }
10885            }
10886            let start = range.start.to_point(&display_snapshot.buffer_snapshot);
10887            if start_row.is_none() {
10888                assert_eq!(end_row, None);
10889                start_row = Some(start);
10890                end_row = Some(end);
10891                continue;
10892            }
10893            if let Some(current_end) = end_row.as_mut() {
10894                if start.row > current_end.row + 1 {
10895                    push_region(start_row, end_row);
10896                    start_row = Some(start);
10897                    end_row = Some(end);
10898                } else {
10899                    // Merge two hunks.
10900                    *current_end = end;
10901                }
10902            } else {
10903                unreachable!();
10904            }
10905        }
10906        // We might still have a hunk that was not rendered (if there was a search hit on the last line)
10907        push_region(start_row, end_row);
10908        results
10909    }
10910
10911    pub fn gutter_highlights_in_range(
10912        &self,
10913        search_range: Range<Anchor>,
10914        display_snapshot: &DisplaySnapshot,
10915        cx: &AppContext,
10916    ) -> Vec<(Range<DisplayPoint>, Hsla)> {
10917        let mut results = Vec::new();
10918        for (color_fetcher, ranges) in self.gutter_highlights.values() {
10919            let color = color_fetcher(cx);
10920            let start_ix = match ranges.binary_search_by(|probe| {
10921                let cmp = probe
10922                    .end
10923                    .cmp(&search_range.start, &display_snapshot.buffer_snapshot);
10924                if cmp.is_gt() {
10925                    Ordering::Greater
10926                } else {
10927                    Ordering::Less
10928                }
10929            }) {
10930                Ok(i) | Err(i) => i,
10931            };
10932            for range in &ranges[start_ix..] {
10933                if range
10934                    .start
10935                    .cmp(&search_range.end, &display_snapshot.buffer_snapshot)
10936                    .is_ge()
10937                {
10938                    break;
10939                }
10940
10941                let start = range.start.to_display_point(&display_snapshot);
10942                let end = range.end.to_display_point(&display_snapshot);
10943                results.push((start..end, color))
10944            }
10945        }
10946        results
10947    }
10948
10949    /// Get the text ranges corresponding to the redaction query
10950    pub fn redacted_ranges(
10951        &self,
10952        search_range: Range<Anchor>,
10953        display_snapshot: &DisplaySnapshot,
10954        cx: &WindowContext,
10955    ) -> Vec<Range<DisplayPoint>> {
10956        display_snapshot
10957            .buffer_snapshot
10958            .redacted_ranges(search_range, |file| {
10959                if let Some(file) = file {
10960                    file.is_private()
10961                        && EditorSettings::get(Some(file.as_ref().into()), cx).redact_private_values
10962                } else {
10963                    false
10964                }
10965            })
10966            .map(|range| {
10967                range.start.to_display_point(display_snapshot)
10968                    ..range.end.to_display_point(display_snapshot)
10969            })
10970            .collect()
10971    }
10972
10973    pub fn highlight_text<T: 'static>(
10974        &mut self,
10975        ranges: Vec<Range<Anchor>>,
10976        style: HighlightStyle,
10977        cx: &mut ViewContext<Self>,
10978    ) {
10979        self.display_map.update(cx, |map, _| {
10980            map.highlight_text(TypeId::of::<T>(), ranges, style)
10981        });
10982        cx.notify();
10983    }
10984
10985    pub(crate) fn highlight_inlays<T: 'static>(
10986        &mut self,
10987        highlights: Vec<InlayHighlight>,
10988        style: HighlightStyle,
10989        cx: &mut ViewContext<Self>,
10990    ) {
10991        self.display_map.update(cx, |map, _| {
10992            map.highlight_inlays(TypeId::of::<T>(), highlights, style)
10993        });
10994        cx.notify();
10995    }
10996
10997    pub fn text_highlights<'a, T: 'static>(
10998        &'a self,
10999        cx: &'a AppContext,
11000    ) -> Option<(HighlightStyle, &'a [Range<Anchor>])> {
11001        self.display_map.read(cx).text_highlights(TypeId::of::<T>())
11002    }
11003
11004    pub fn clear_highlights<T: 'static>(&mut self, cx: &mut ViewContext<Self>) {
11005        let cleared = self
11006            .display_map
11007            .update(cx, |map, _| map.clear_highlights(TypeId::of::<T>()));
11008        if cleared {
11009            cx.notify();
11010        }
11011    }
11012
11013    pub fn show_local_cursors(&self, cx: &WindowContext) -> bool {
11014        (self.read_only(cx) || self.blink_manager.read(cx).visible())
11015            && self.focus_handle.is_focused(cx)
11016    }
11017
11018    pub fn set_show_cursor_when_unfocused(&mut self, is_enabled: bool, cx: &mut ViewContext<Self>) {
11019        self.show_cursor_when_unfocused = is_enabled;
11020        cx.notify();
11021    }
11022
11023    fn on_buffer_changed(&mut self, _: Model<MultiBuffer>, cx: &mut ViewContext<Self>) {
11024        cx.notify();
11025    }
11026
11027    fn on_buffer_event(
11028        &mut self,
11029        multibuffer: Model<MultiBuffer>,
11030        event: &multi_buffer::Event,
11031        cx: &mut ViewContext<Self>,
11032    ) {
11033        match event {
11034            multi_buffer::Event::Edited {
11035                singleton_buffer_edited,
11036            } => {
11037                self.scrollbar_marker_state.dirty = true;
11038                self.active_indent_guides_state.dirty = true;
11039                self.refresh_active_diagnostics(cx);
11040                self.refresh_code_actions(cx);
11041                if self.has_active_inline_completion(cx) {
11042                    self.update_visible_inline_completion(cx);
11043                }
11044                cx.emit(EditorEvent::BufferEdited);
11045                cx.emit(SearchEvent::MatchesInvalidated);
11046                if *singleton_buffer_edited {
11047                    if let Some(project) = &self.project {
11048                        let project = project.read(cx);
11049                        let languages_affected = multibuffer
11050                            .read(cx)
11051                            .all_buffers()
11052                            .into_iter()
11053                            .filter_map(|buffer| {
11054                                let buffer = buffer.read(cx);
11055                                let language = buffer.language()?;
11056                                if project.is_local()
11057                                    && project.language_servers_for_buffer(buffer, cx).count() == 0
11058                                {
11059                                    None
11060                                } else {
11061                                    Some(language)
11062                                }
11063                            })
11064                            .cloned()
11065                            .collect::<HashSet<_>>();
11066                        if !languages_affected.is_empty() {
11067                            self.refresh_inlay_hints(
11068                                InlayHintRefreshReason::BufferEdited(languages_affected),
11069                                cx,
11070                            );
11071                        }
11072                    }
11073                }
11074
11075                let Some(project) = &self.project else { return };
11076                let telemetry = project.read(cx).client().telemetry().clone();
11077                refresh_linked_ranges(self, cx);
11078                telemetry.log_edit_event("editor");
11079            }
11080            multi_buffer::Event::ExcerptsAdded {
11081                buffer,
11082                predecessor,
11083                excerpts,
11084            } => {
11085                self.tasks_update_task = Some(self.refresh_runnables(cx));
11086                cx.emit(EditorEvent::ExcerptsAdded {
11087                    buffer: buffer.clone(),
11088                    predecessor: *predecessor,
11089                    excerpts: excerpts.clone(),
11090                });
11091                self.refresh_inlay_hints(InlayHintRefreshReason::NewLinesShown, cx);
11092            }
11093            multi_buffer::Event::ExcerptsRemoved { ids } => {
11094                self.refresh_inlay_hints(InlayHintRefreshReason::ExcerptsRemoved(ids.clone()), cx);
11095                cx.emit(EditorEvent::ExcerptsRemoved { ids: ids.clone() })
11096            }
11097            multi_buffer::Event::ExcerptsEdited { ids } => {
11098                cx.emit(EditorEvent::ExcerptsEdited { ids: ids.clone() })
11099            }
11100            multi_buffer::Event::ExcerptsExpanded { ids } => {
11101                cx.emit(EditorEvent::ExcerptsExpanded { ids: ids.clone() })
11102            }
11103            multi_buffer::Event::Reparsed(buffer_id) => {
11104                self.tasks_update_task = Some(self.refresh_runnables(cx));
11105
11106                cx.emit(EditorEvent::Reparsed(*buffer_id));
11107            }
11108            multi_buffer::Event::LanguageChanged(buffer_id) => {
11109                linked_editing_ranges::refresh_linked_ranges(self, cx);
11110                cx.emit(EditorEvent::Reparsed(*buffer_id));
11111                cx.notify();
11112            }
11113            multi_buffer::Event::DirtyChanged => cx.emit(EditorEvent::DirtyChanged),
11114            multi_buffer::Event::Saved => cx.emit(EditorEvent::Saved),
11115            multi_buffer::Event::FileHandleChanged | multi_buffer::Event::Reloaded => {
11116                cx.emit(EditorEvent::TitleChanged)
11117            }
11118            multi_buffer::Event::DiffBaseChanged => {
11119                self.scrollbar_marker_state.dirty = true;
11120                cx.emit(EditorEvent::DiffBaseChanged);
11121                cx.notify();
11122            }
11123            multi_buffer::Event::DiffUpdated { buffer } => {
11124                self.sync_expanded_diff_hunks(buffer.clone(), cx);
11125                cx.notify();
11126            }
11127            multi_buffer::Event::Closed => cx.emit(EditorEvent::Closed),
11128            multi_buffer::Event::DiagnosticsUpdated => {
11129                self.refresh_active_diagnostics(cx);
11130                self.scrollbar_marker_state.dirty = true;
11131                cx.notify();
11132            }
11133            _ => {}
11134        };
11135    }
11136
11137    fn on_display_map_changed(&mut self, _: Model<DisplayMap>, cx: &mut ViewContext<Self>) {
11138        cx.notify();
11139    }
11140
11141    fn settings_changed(&mut self, cx: &mut ViewContext<Self>) {
11142        self.tasks_update_task = Some(self.refresh_runnables(cx));
11143        self.refresh_inline_completion(true, cx);
11144        self.refresh_inlay_hints(
11145            InlayHintRefreshReason::SettingsChange(inlay_hint_settings(
11146                self.selections.newest_anchor().head(),
11147                &self.buffer.read(cx).snapshot(cx),
11148                cx,
11149            )),
11150            cx,
11151        );
11152        let editor_settings = EditorSettings::get_global(cx);
11153        self.scroll_manager.vertical_scroll_margin = editor_settings.vertical_scroll_margin;
11154        self.show_breadcrumbs = editor_settings.toolbar.breadcrumbs;
11155
11156        if self.mode == EditorMode::Full {
11157            let inline_blame_enabled = ProjectSettings::get_global(cx).git.inline_blame_enabled();
11158            if self.git_blame_inline_enabled != inline_blame_enabled {
11159                self.toggle_git_blame_inline_internal(false, cx);
11160            }
11161        }
11162
11163        cx.notify();
11164    }
11165
11166    pub fn set_searchable(&mut self, searchable: bool) {
11167        self.searchable = searchable;
11168    }
11169
11170    pub fn searchable(&self) -> bool {
11171        self.searchable
11172    }
11173
11174    fn open_excerpts_in_split(&mut self, _: &OpenExcerptsSplit, cx: &mut ViewContext<Self>) {
11175        self.open_excerpts_common(true, cx)
11176    }
11177
11178    fn open_excerpts(&mut self, _: &OpenExcerpts, cx: &mut ViewContext<Self>) {
11179        self.open_excerpts_common(false, cx)
11180    }
11181
11182    fn open_excerpts_common(&mut self, split: bool, cx: &mut ViewContext<Self>) {
11183        let buffer = self.buffer.read(cx);
11184        if buffer.is_singleton() {
11185            cx.propagate();
11186            return;
11187        }
11188
11189        let Some(workspace) = self.workspace() else {
11190            cx.propagate();
11191            return;
11192        };
11193
11194        let mut new_selections_by_buffer = HashMap::default();
11195        for selection in self.selections.all::<usize>(cx) {
11196            for (buffer, mut range, _) in
11197                buffer.range_to_buffer_ranges(selection.start..selection.end, cx)
11198            {
11199                if selection.reversed {
11200                    mem::swap(&mut range.start, &mut range.end);
11201                }
11202                new_selections_by_buffer
11203                    .entry(buffer)
11204                    .or_insert(Vec::new())
11205                    .push(range)
11206            }
11207        }
11208
11209        // We defer the pane interaction because we ourselves are a workspace item
11210        // and activating a new item causes the pane to call a method on us reentrantly,
11211        // which panics if we're on the stack.
11212        cx.window_context().defer(move |cx| {
11213            workspace.update(cx, |workspace, cx| {
11214                let pane = if split {
11215                    workspace.adjacent_pane(cx)
11216                } else {
11217                    workspace.active_pane().clone()
11218                };
11219
11220                for (buffer, ranges) in new_selections_by_buffer {
11221                    let editor = workspace.open_project_item::<Self>(pane.clone(), buffer, cx);
11222                    editor.update(cx, |editor, cx| {
11223                        editor.change_selections(Some(Autoscroll::newest()), cx, |s| {
11224                            s.select_ranges(ranges);
11225                        });
11226                    });
11227                }
11228            })
11229        });
11230    }
11231
11232    fn jump(
11233        &mut self,
11234        path: ProjectPath,
11235        position: Point,
11236        anchor: language::Anchor,
11237        offset_from_top: u32,
11238        cx: &mut ViewContext<Self>,
11239    ) {
11240        let workspace = self.workspace();
11241        cx.spawn(|_, mut cx| async move {
11242            let workspace = workspace.ok_or_else(|| anyhow!("cannot jump without workspace"))?;
11243            let editor = workspace.update(&mut cx, |workspace, cx| {
11244                // Reset the preview item id before opening the new item
11245                workspace.active_pane().update(cx, |pane, cx| {
11246                    pane.set_preview_item_id(None, cx);
11247                });
11248                workspace.open_path_preview(path, None, true, true, cx)
11249            })?;
11250            let editor = editor
11251                .await?
11252                .downcast::<Editor>()
11253                .ok_or_else(|| anyhow!("opened item was not an editor"))?
11254                .downgrade();
11255            editor.update(&mut cx, |editor, cx| {
11256                let buffer = editor
11257                    .buffer()
11258                    .read(cx)
11259                    .as_singleton()
11260                    .ok_or_else(|| anyhow!("cannot jump in a multi-buffer"))?;
11261                let buffer = buffer.read(cx);
11262                let cursor = if buffer.can_resolve(&anchor) {
11263                    language::ToPoint::to_point(&anchor, buffer)
11264                } else {
11265                    buffer.clip_point(position, Bias::Left)
11266                };
11267
11268                let nav_history = editor.nav_history.take();
11269                editor.change_selections(
11270                    Some(Autoscroll::top_relative(offset_from_top as usize)),
11271                    cx,
11272                    |s| {
11273                        s.select_ranges([cursor..cursor]);
11274                    },
11275                );
11276                editor.nav_history = nav_history;
11277
11278                anyhow::Ok(())
11279            })??;
11280
11281            anyhow::Ok(())
11282        })
11283        .detach_and_log_err(cx);
11284    }
11285
11286    fn marked_text_ranges(&self, cx: &AppContext) -> Option<Vec<Range<OffsetUtf16>>> {
11287        let snapshot = self.buffer.read(cx).read(cx);
11288        let (_, ranges) = self.text_highlights::<InputComposition>(cx)?;
11289        Some(
11290            ranges
11291                .iter()
11292                .map(move |range| {
11293                    range.start.to_offset_utf16(&snapshot)..range.end.to_offset_utf16(&snapshot)
11294                })
11295                .collect(),
11296        )
11297    }
11298
11299    fn selection_replacement_ranges(
11300        &self,
11301        range: Range<OffsetUtf16>,
11302        cx: &AppContext,
11303    ) -> Vec<Range<OffsetUtf16>> {
11304        let selections = self.selections.all::<OffsetUtf16>(cx);
11305        let newest_selection = selections
11306            .iter()
11307            .max_by_key(|selection| selection.id)
11308            .unwrap();
11309        let start_delta = range.start.0 as isize - newest_selection.start.0 as isize;
11310        let end_delta = range.end.0 as isize - newest_selection.end.0 as isize;
11311        let snapshot = self.buffer.read(cx).read(cx);
11312        selections
11313            .into_iter()
11314            .map(|mut selection| {
11315                selection.start.0 =
11316                    (selection.start.0 as isize).saturating_add(start_delta) as usize;
11317                selection.end.0 = (selection.end.0 as isize).saturating_add(end_delta) as usize;
11318                snapshot.clip_offset_utf16(selection.start, Bias::Left)
11319                    ..snapshot.clip_offset_utf16(selection.end, Bias::Right)
11320            })
11321            .collect()
11322    }
11323
11324    fn report_editor_event(
11325        &self,
11326        operation: &'static str,
11327        file_extension: Option<String>,
11328        cx: &AppContext,
11329    ) {
11330        if cfg!(any(test, feature = "test-support")) {
11331            return;
11332        }
11333
11334        let Some(project) = &self.project else { return };
11335
11336        // If None, we are in a file without an extension
11337        let file = self
11338            .buffer
11339            .read(cx)
11340            .as_singleton()
11341            .and_then(|b| b.read(cx).file());
11342        let file_extension = file_extension.or(file
11343            .as_ref()
11344            .and_then(|file| Path::new(file.file_name(cx)).extension())
11345            .and_then(|e| e.to_str())
11346            .map(|a| a.to_string()));
11347
11348        let vim_mode = cx
11349            .global::<SettingsStore>()
11350            .raw_user_settings()
11351            .get("vim_mode")
11352            == Some(&serde_json::Value::Bool(true));
11353
11354        let copilot_enabled = all_language_settings(file, cx).inline_completions.provider
11355            == language::language_settings::InlineCompletionProvider::Copilot;
11356        let copilot_enabled_for_language = self
11357            .buffer
11358            .read(cx)
11359            .settings_at(0, cx)
11360            .show_inline_completions;
11361
11362        let telemetry = project.read(cx).client().telemetry().clone();
11363        telemetry.report_editor_event(
11364            file_extension,
11365            vim_mode,
11366            operation,
11367            copilot_enabled,
11368            copilot_enabled_for_language,
11369        )
11370    }
11371
11372    /// Copy the highlighted chunks to the clipboard as JSON. The format is an array of lines,
11373    /// with each line being an array of {text, highlight} objects.
11374    fn copy_highlight_json(&mut self, _: &CopyHighlightJson, cx: &mut ViewContext<Self>) {
11375        let Some(buffer) = self.buffer.read(cx).as_singleton() else {
11376            return;
11377        };
11378
11379        #[derive(Serialize)]
11380        struct Chunk<'a> {
11381            text: String,
11382            highlight: Option<&'a str>,
11383        }
11384
11385        let snapshot = buffer.read(cx).snapshot();
11386        let range = self
11387            .selected_text_range(cx)
11388            .and_then(|selected_range| {
11389                if selected_range.is_empty() {
11390                    None
11391                } else {
11392                    Some(selected_range)
11393                }
11394            })
11395            .unwrap_or_else(|| 0..snapshot.len());
11396
11397        let chunks = snapshot.chunks(range, true);
11398        let mut lines = Vec::new();
11399        let mut line: VecDeque<Chunk> = VecDeque::new();
11400
11401        let Some(style) = self.style.as_ref() else {
11402            return;
11403        };
11404
11405        for chunk in chunks {
11406            let highlight = chunk
11407                .syntax_highlight_id
11408                .and_then(|id| id.name(&style.syntax));
11409            let mut chunk_lines = chunk.text.split('\n').peekable();
11410            while let Some(text) = chunk_lines.next() {
11411                let mut merged_with_last_token = false;
11412                if let Some(last_token) = line.back_mut() {
11413                    if last_token.highlight == highlight {
11414                        last_token.text.push_str(text);
11415                        merged_with_last_token = true;
11416                    }
11417                }
11418
11419                if !merged_with_last_token {
11420                    line.push_back(Chunk {
11421                        text: text.into(),
11422                        highlight,
11423                    });
11424                }
11425
11426                if chunk_lines.peek().is_some() {
11427                    if line.len() > 1 && line.front().unwrap().text.is_empty() {
11428                        line.pop_front();
11429                    }
11430                    if line.len() > 1 && line.back().unwrap().text.is_empty() {
11431                        line.pop_back();
11432                    }
11433
11434                    lines.push(mem::take(&mut line));
11435                }
11436            }
11437        }
11438
11439        let Some(lines) = serde_json::to_string_pretty(&lines).log_err() else {
11440            return;
11441        };
11442        cx.write_to_clipboard(ClipboardItem::new(lines));
11443    }
11444
11445    pub fn inlay_hint_cache(&self) -> &InlayHintCache {
11446        &self.inlay_hint_cache
11447    }
11448
11449    pub fn replay_insert_event(
11450        &mut self,
11451        text: &str,
11452        relative_utf16_range: Option<Range<isize>>,
11453        cx: &mut ViewContext<Self>,
11454    ) {
11455        if !self.input_enabled {
11456            cx.emit(EditorEvent::InputIgnored { text: text.into() });
11457            return;
11458        }
11459        if let Some(relative_utf16_range) = relative_utf16_range {
11460            let selections = self.selections.all::<OffsetUtf16>(cx);
11461            self.change_selections(None, cx, |s| {
11462                let new_ranges = selections.into_iter().map(|range| {
11463                    let start = OffsetUtf16(
11464                        range
11465                            .head()
11466                            .0
11467                            .saturating_add_signed(relative_utf16_range.start),
11468                    );
11469                    let end = OffsetUtf16(
11470                        range
11471                            .head()
11472                            .0
11473                            .saturating_add_signed(relative_utf16_range.end),
11474                    );
11475                    start..end
11476                });
11477                s.select_ranges(new_ranges);
11478            });
11479        }
11480
11481        self.handle_input(text, cx);
11482    }
11483
11484    pub fn supports_inlay_hints(&self, cx: &AppContext) -> bool {
11485        let Some(project) = self.project.as_ref() else {
11486            return false;
11487        };
11488        let project = project.read(cx);
11489
11490        let mut supports = false;
11491        self.buffer().read(cx).for_each_buffer(|buffer| {
11492            if !supports {
11493                supports = project
11494                    .language_servers_for_buffer(buffer.read(cx), cx)
11495                    .any(
11496                        |(_, server)| match server.capabilities().inlay_hint_provider {
11497                            Some(lsp::OneOf::Left(enabled)) => enabled,
11498                            Some(lsp::OneOf::Right(_)) => true,
11499                            None => false,
11500                        },
11501                    )
11502            }
11503        });
11504        supports
11505    }
11506
11507    pub fn focus(&self, cx: &mut WindowContext) {
11508        cx.focus(&self.focus_handle)
11509    }
11510
11511    pub fn is_focused(&self, cx: &WindowContext) -> bool {
11512        self.focus_handle.is_focused(cx)
11513    }
11514
11515    fn handle_focus(&mut self, cx: &mut ViewContext<Self>) {
11516        cx.emit(EditorEvent::Focused);
11517
11518        if let Some(descendant) = self
11519            .last_focused_descendant
11520            .take()
11521            .and_then(|descendant| descendant.upgrade())
11522        {
11523            cx.focus(&descendant);
11524        } else {
11525            if let Some(blame) = self.blame.as_ref() {
11526                blame.update(cx, GitBlame::focus)
11527            }
11528
11529            self.blink_manager.update(cx, BlinkManager::enable);
11530            self.show_cursor_names(cx);
11531            self.buffer.update(cx, |buffer, cx| {
11532                buffer.finalize_last_transaction(cx);
11533                if self.leader_peer_id.is_none() {
11534                    buffer.set_active_selections(
11535                        &self.selections.disjoint_anchors(),
11536                        self.selections.line_mode,
11537                        self.cursor_shape,
11538                        cx,
11539                    );
11540                }
11541            });
11542        }
11543    }
11544
11545    fn handle_focus_out(&mut self, event: FocusOutEvent, _cx: &mut ViewContext<Self>) {
11546        if event.blurred != self.focus_handle {
11547            self.last_focused_descendant = Some(event.blurred);
11548        }
11549    }
11550
11551    pub fn handle_blur(&mut self, cx: &mut ViewContext<Self>) {
11552        self.blink_manager.update(cx, BlinkManager::disable);
11553        self.buffer
11554            .update(cx, |buffer, cx| buffer.remove_active_selections(cx));
11555
11556        if let Some(blame) = self.blame.as_ref() {
11557            blame.update(cx, GitBlame::blur)
11558        }
11559        self.hide_context_menu(cx);
11560        hide_hover(self, cx);
11561        cx.emit(EditorEvent::Blurred);
11562        cx.notify();
11563    }
11564
11565    pub fn register_action<A: Action>(
11566        &mut self,
11567        listener: impl Fn(&A, &mut WindowContext) + 'static,
11568    ) -> Subscription {
11569        let id = self.next_editor_action_id.post_inc();
11570        let listener = Arc::new(listener);
11571        self.editor_actions.borrow_mut().insert(
11572            id,
11573            Box::new(move |cx| {
11574                let _view = cx.view().clone();
11575                let cx = cx.window_context();
11576                let listener = listener.clone();
11577                cx.on_action(TypeId::of::<A>(), move |action, phase, cx| {
11578                    let action = action.downcast_ref().unwrap();
11579                    if phase == DispatchPhase::Bubble {
11580                        listener(action, cx)
11581                    }
11582                })
11583            }),
11584        );
11585
11586        let editor_actions = self.editor_actions.clone();
11587        Subscription::new(move || {
11588            editor_actions.borrow_mut().remove(&id);
11589        })
11590    }
11591
11592    pub fn file_header_size(&self) -> u8 {
11593        self.file_header_size
11594    }
11595}
11596
11597fn hunks_for_selections(
11598    multi_buffer_snapshot: &MultiBufferSnapshot,
11599    selections: &[Selection<Anchor>],
11600) -> Vec<DiffHunk<MultiBufferRow>> {
11601    let mut hunks = Vec::with_capacity(selections.len());
11602    let mut processed_buffer_rows: HashMap<BufferId, HashSet<Range<text::Anchor>>> =
11603        HashMap::default();
11604    let buffer_rows_for_selections = selections.iter().map(|selection| {
11605        let head = selection.head();
11606        let tail = selection.tail();
11607        let start = MultiBufferRow(tail.to_point(&multi_buffer_snapshot).row);
11608        let end = MultiBufferRow(head.to_point(&multi_buffer_snapshot).row);
11609        if start > end {
11610            end..start
11611        } else {
11612            start..end
11613        }
11614    });
11615
11616    for selected_multi_buffer_rows in buffer_rows_for_selections {
11617        let query_rows =
11618            selected_multi_buffer_rows.start..selected_multi_buffer_rows.end.next_row();
11619        for hunk in multi_buffer_snapshot.git_diff_hunks_in_range(query_rows.clone()) {
11620            // Deleted hunk is an empty row range, no caret can be placed there and Zed allows to revert it
11621            // when the caret is just above or just below the deleted hunk.
11622            let allow_adjacent = hunk_status(&hunk) == DiffHunkStatus::Removed;
11623            let related_to_selection = if allow_adjacent {
11624                hunk.associated_range.overlaps(&query_rows)
11625                    || hunk.associated_range.start == query_rows.end
11626                    || hunk.associated_range.end == query_rows.start
11627            } else {
11628                // `selected_multi_buffer_rows` are inclusive (e.g. [2..2] means 2nd row is selected)
11629                // `hunk.associated_range` is exclusive (e.g. [2..3] means 2nd row is selected)
11630                hunk.associated_range.overlaps(&selected_multi_buffer_rows)
11631                    || selected_multi_buffer_rows.end == hunk.associated_range.start
11632            };
11633            if related_to_selection {
11634                if !processed_buffer_rows
11635                    .entry(hunk.buffer_id)
11636                    .or_default()
11637                    .insert(hunk.buffer_range.start..hunk.buffer_range.end)
11638                {
11639                    continue;
11640                }
11641                hunks.push(hunk);
11642            }
11643        }
11644    }
11645
11646    hunks
11647}
11648
11649pub trait CollaborationHub {
11650    fn collaborators<'a>(&self, cx: &'a AppContext) -> &'a HashMap<PeerId, Collaborator>;
11651    fn user_participant_indices<'a>(
11652        &self,
11653        cx: &'a AppContext,
11654    ) -> &'a HashMap<u64, ParticipantIndex>;
11655    fn user_names(&self, cx: &AppContext) -> HashMap<u64, SharedString>;
11656}
11657
11658impl CollaborationHub for Model<Project> {
11659    fn collaborators<'a>(&self, cx: &'a AppContext) -> &'a HashMap<PeerId, Collaborator> {
11660        self.read(cx).collaborators()
11661    }
11662
11663    fn user_participant_indices<'a>(
11664        &self,
11665        cx: &'a AppContext,
11666    ) -> &'a HashMap<u64, ParticipantIndex> {
11667        self.read(cx).user_store().read(cx).participant_indices()
11668    }
11669
11670    fn user_names(&self, cx: &AppContext) -> HashMap<u64, SharedString> {
11671        let this = self.read(cx);
11672        let user_ids = this.collaborators().values().map(|c| c.user_id);
11673        this.user_store().read_with(cx, |user_store, cx| {
11674            user_store.participant_names(user_ids, cx)
11675        })
11676    }
11677}
11678
11679pub trait CompletionProvider {
11680    fn completions(
11681        &self,
11682        buffer: &Model<Buffer>,
11683        buffer_position: text::Anchor,
11684        trigger: CompletionContext,
11685        cx: &mut ViewContext<Editor>,
11686    ) -> Task<Result<Vec<Completion>>>;
11687
11688    fn resolve_completions(
11689        &self,
11690        buffer: Model<Buffer>,
11691        completion_indices: Vec<usize>,
11692        completions: Arc<RwLock<Box<[Completion]>>>,
11693        cx: &mut ViewContext<Editor>,
11694    ) -> Task<Result<bool>>;
11695
11696    fn apply_additional_edits_for_completion(
11697        &self,
11698        buffer: Model<Buffer>,
11699        completion: Completion,
11700        push_to_history: bool,
11701        cx: &mut ViewContext<Editor>,
11702    ) -> Task<Result<Option<language::Transaction>>>;
11703
11704    fn is_completion_trigger(
11705        &self,
11706        buffer: &Model<Buffer>,
11707        position: language::Anchor,
11708        text: &str,
11709        trigger_in_words: bool,
11710        cx: &mut ViewContext<Editor>,
11711    ) -> bool;
11712}
11713
11714impl CompletionProvider for Model<Project> {
11715    fn completions(
11716        &self,
11717        buffer: &Model<Buffer>,
11718        buffer_position: text::Anchor,
11719        options: CompletionContext,
11720        cx: &mut ViewContext<Editor>,
11721    ) -> Task<Result<Vec<Completion>>> {
11722        self.update(cx, |project, cx| {
11723            project.completions(&buffer, buffer_position, options, cx)
11724        })
11725    }
11726
11727    fn resolve_completions(
11728        &self,
11729        buffer: Model<Buffer>,
11730        completion_indices: Vec<usize>,
11731        completions: Arc<RwLock<Box<[Completion]>>>,
11732        cx: &mut ViewContext<Editor>,
11733    ) -> Task<Result<bool>> {
11734        self.update(cx, |project, cx| {
11735            project.resolve_completions(buffer, completion_indices, completions, cx)
11736        })
11737    }
11738
11739    fn apply_additional_edits_for_completion(
11740        &self,
11741        buffer: Model<Buffer>,
11742        completion: Completion,
11743        push_to_history: bool,
11744        cx: &mut ViewContext<Editor>,
11745    ) -> Task<Result<Option<language::Transaction>>> {
11746        self.update(cx, |project, cx| {
11747            project.apply_additional_edits_for_completion(buffer, completion, push_to_history, cx)
11748        })
11749    }
11750
11751    fn is_completion_trigger(
11752        &self,
11753        buffer: &Model<Buffer>,
11754        position: language::Anchor,
11755        text: &str,
11756        trigger_in_words: bool,
11757        cx: &mut ViewContext<Editor>,
11758    ) -> bool {
11759        if !EditorSettings::get_global(cx).show_completions_on_input {
11760            return false;
11761        }
11762
11763        let mut chars = text.chars();
11764        let char = if let Some(char) = chars.next() {
11765            char
11766        } else {
11767            return false;
11768        };
11769        if chars.next().is_some() {
11770            return false;
11771        }
11772
11773        let buffer = buffer.read(cx);
11774        let scope = buffer.snapshot().language_scope_at(position);
11775        if trigger_in_words && char_kind(&scope, char) == CharKind::Word {
11776            return true;
11777        }
11778
11779        buffer
11780            .completion_triggers()
11781            .iter()
11782            .any(|string| string == text)
11783    }
11784}
11785
11786fn inlay_hint_settings(
11787    location: Anchor,
11788    snapshot: &MultiBufferSnapshot,
11789    cx: &mut ViewContext<'_, Editor>,
11790) -> InlayHintSettings {
11791    let file = snapshot.file_at(location);
11792    let language = snapshot.language_at(location);
11793    let settings = all_language_settings(file, cx);
11794    settings
11795        .language(language.map(|l| l.name()).as_deref())
11796        .inlay_hints
11797}
11798
11799fn consume_contiguous_rows(
11800    contiguous_row_selections: &mut Vec<Selection<Point>>,
11801    selection: &Selection<Point>,
11802    display_map: &DisplaySnapshot,
11803    selections: &mut std::iter::Peekable<std::slice::Iter<Selection<Point>>>,
11804) -> (MultiBufferRow, MultiBufferRow) {
11805    contiguous_row_selections.push(selection.clone());
11806    let start_row = MultiBufferRow(selection.start.row);
11807    let mut end_row = ending_row(selection, display_map);
11808
11809    while let Some(next_selection) = selections.peek() {
11810        if next_selection.start.row <= end_row.0 {
11811            end_row = ending_row(next_selection, display_map);
11812            contiguous_row_selections.push(selections.next().unwrap().clone());
11813        } else {
11814            break;
11815        }
11816    }
11817    (start_row, end_row)
11818}
11819
11820fn ending_row(next_selection: &Selection<Point>, display_map: &DisplaySnapshot) -> MultiBufferRow {
11821    if next_selection.end.column > 0 || next_selection.is_empty() {
11822        MultiBufferRow(display_map.next_line_boundary(next_selection.end).0.row + 1)
11823    } else {
11824        MultiBufferRow(next_selection.end.row)
11825    }
11826}
11827
11828impl EditorSnapshot {
11829    pub fn remote_selections_in_range<'a>(
11830        &'a self,
11831        range: &'a Range<Anchor>,
11832        collaboration_hub: &dyn CollaborationHub,
11833        cx: &'a AppContext,
11834    ) -> impl 'a + Iterator<Item = RemoteSelection> {
11835        let participant_names = collaboration_hub.user_names(cx);
11836        let participant_indices = collaboration_hub.user_participant_indices(cx);
11837        let collaborators_by_peer_id = collaboration_hub.collaborators(cx);
11838        let collaborators_by_replica_id = collaborators_by_peer_id
11839            .iter()
11840            .map(|(_, collaborator)| (collaborator.replica_id, collaborator))
11841            .collect::<HashMap<_, _>>();
11842        self.buffer_snapshot
11843            .selections_in_range(range, false)
11844            .filter_map(move |(replica_id, line_mode, cursor_shape, selection)| {
11845                let collaborator = collaborators_by_replica_id.get(&replica_id)?;
11846                let participant_index = participant_indices.get(&collaborator.user_id).copied();
11847                let user_name = participant_names.get(&collaborator.user_id).cloned();
11848                Some(RemoteSelection {
11849                    replica_id,
11850                    selection,
11851                    cursor_shape,
11852                    line_mode,
11853                    participant_index,
11854                    peer_id: collaborator.peer_id,
11855                    user_name,
11856                })
11857            })
11858    }
11859
11860    pub fn language_at<T: ToOffset>(&self, position: T) -> Option<&Arc<Language>> {
11861        self.display_snapshot.buffer_snapshot.language_at(position)
11862    }
11863
11864    pub fn is_focused(&self) -> bool {
11865        self.is_focused
11866    }
11867
11868    pub fn placeholder_text(&self) -> Option<&Arc<str>> {
11869        self.placeholder_text.as_ref()
11870    }
11871
11872    pub fn scroll_position(&self) -> gpui::Point<f32> {
11873        self.scroll_anchor.scroll_position(&self.display_snapshot)
11874    }
11875
11876    pub fn gutter_dimensions(
11877        &self,
11878        font_id: FontId,
11879        font_size: Pixels,
11880        em_width: Pixels,
11881        max_line_number_width: Pixels,
11882        cx: &AppContext,
11883    ) -> GutterDimensions {
11884        if !self.show_gutter {
11885            return GutterDimensions::default();
11886        }
11887        let descent = cx.text_system().descent(font_id, font_size);
11888
11889        let show_git_gutter = self.show_git_diff_gutter.unwrap_or_else(|| {
11890            matches!(
11891                ProjectSettings::get_global(cx).git.git_gutter,
11892                Some(GitGutterSetting::TrackedFiles)
11893            )
11894        });
11895        let gutter_settings = EditorSettings::get_global(cx).gutter;
11896        let show_line_numbers = self
11897            .show_line_numbers
11898            .unwrap_or(gutter_settings.line_numbers);
11899        let line_gutter_width = if show_line_numbers {
11900            // Avoid flicker-like gutter resizes when the line number gains another digit and only resize the gutter on files with N*10^5 lines.
11901            let min_width_for_number_on_gutter = em_width * 4.0;
11902            max_line_number_width.max(min_width_for_number_on_gutter)
11903        } else {
11904            0.0.into()
11905        };
11906
11907        let show_code_actions = self
11908            .show_code_actions
11909            .unwrap_or(gutter_settings.code_actions);
11910
11911        let show_runnables = self.show_runnables.unwrap_or(gutter_settings.runnables);
11912
11913        let git_blame_entries_width = self
11914            .render_git_blame_gutter
11915            .then_some(em_width * GIT_BLAME_GUTTER_WIDTH_CHARS);
11916
11917        let mut left_padding = git_blame_entries_width.unwrap_or(Pixels::ZERO);
11918        left_padding += if show_code_actions || show_runnables {
11919            em_width * 3.0
11920        } else if show_git_gutter && show_line_numbers {
11921            em_width * 2.0
11922        } else if show_git_gutter || show_line_numbers {
11923            em_width
11924        } else {
11925            px(0.)
11926        };
11927
11928        let right_padding = if gutter_settings.folds && show_line_numbers {
11929            em_width * 4.0
11930        } else if gutter_settings.folds {
11931            em_width * 3.0
11932        } else if show_line_numbers {
11933            em_width
11934        } else {
11935            px(0.)
11936        };
11937
11938        GutterDimensions {
11939            left_padding,
11940            right_padding,
11941            width: line_gutter_width + left_padding + right_padding,
11942            margin: -descent,
11943            git_blame_entries_width,
11944        }
11945    }
11946
11947    pub fn render_fold_toggle(
11948        &self,
11949        buffer_row: MultiBufferRow,
11950        row_contains_cursor: bool,
11951        editor: View<Editor>,
11952        cx: &mut WindowContext,
11953    ) -> Option<AnyElement> {
11954        let folded = self.is_line_folded(buffer_row);
11955
11956        if let Some(crease) = self
11957            .crease_snapshot
11958            .query_row(buffer_row, &self.buffer_snapshot)
11959        {
11960            let toggle_callback = Arc::new(move |folded, cx: &mut WindowContext| {
11961                if folded {
11962                    editor.update(cx, |editor, cx| {
11963                        editor.fold_at(&crate::FoldAt { buffer_row }, cx)
11964                    });
11965                } else {
11966                    editor.update(cx, |editor, cx| {
11967                        editor.unfold_at(&crate::UnfoldAt { buffer_row }, cx)
11968                    });
11969                }
11970            });
11971
11972            Some((crease.render_toggle)(
11973                buffer_row,
11974                folded,
11975                toggle_callback,
11976                cx,
11977            ))
11978        } else if folded
11979            || (self.starts_indent(buffer_row) && (row_contains_cursor || self.gutter_hovered))
11980        {
11981            Some(
11982                Disclosure::new(("indent-fold-indicator", buffer_row.0), !folded)
11983                    .selected(folded)
11984                    .on_click(cx.listener_for(&editor, move |this, _e, cx| {
11985                        if folded {
11986                            this.unfold_at(&UnfoldAt { buffer_row }, cx);
11987                        } else {
11988                            this.fold_at(&FoldAt { buffer_row }, cx);
11989                        }
11990                    }))
11991                    .into_any_element(),
11992            )
11993        } else {
11994            None
11995        }
11996    }
11997
11998    pub fn render_crease_trailer(
11999        &self,
12000        buffer_row: MultiBufferRow,
12001        cx: &mut WindowContext,
12002    ) -> Option<AnyElement> {
12003        let folded = self.is_line_folded(buffer_row);
12004        let crease = self
12005            .crease_snapshot
12006            .query_row(buffer_row, &self.buffer_snapshot)?;
12007        Some((crease.render_trailer)(buffer_row, folded, cx))
12008    }
12009}
12010
12011impl Deref for EditorSnapshot {
12012    type Target = DisplaySnapshot;
12013
12014    fn deref(&self) -> &Self::Target {
12015        &self.display_snapshot
12016    }
12017}
12018
12019#[derive(Clone, Debug, PartialEq, Eq)]
12020pub enum EditorEvent {
12021    InputIgnored {
12022        text: Arc<str>,
12023    },
12024    InputHandled {
12025        utf16_range_to_replace: Option<Range<isize>>,
12026        text: Arc<str>,
12027    },
12028    ExcerptsAdded {
12029        buffer: Model<Buffer>,
12030        predecessor: ExcerptId,
12031        excerpts: Vec<(ExcerptId, ExcerptRange<language::Anchor>)>,
12032    },
12033    ExcerptsRemoved {
12034        ids: Vec<ExcerptId>,
12035    },
12036    ExcerptsEdited {
12037        ids: Vec<ExcerptId>,
12038    },
12039    ExcerptsExpanded {
12040        ids: Vec<ExcerptId>,
12041    },
12042    BufferEdited,
12043    Edited {
12044        transaction_id: clock::Lamport,
12045    },
12046    Reparsed(BufferId),
12047    Focused,
12048    Blurred,
12049    DirtyChanged,
12050    Saved,
12051    TitleChanged,
12052    DiffBaseChanged,
12053    SelectionsChanged {
12054        local: bool,
12055    },
12056    ScrollPositionChanged {
12057        local: bool,
12058        autoscroll: bool,
12059    },
12060    Closed,
12061    TransactionUndone {
12062        transaction_id: clock::Lamport,
12063    },
12064    TransactionBegun {
12065        transaction_id: clock::Lamport,
12066    },
12067}
12068
12069impl EventEmitter<EditorEvent> for Editor {}
12070
12071impl FocusableView for Editor {
12072    fn focus_handle(&self, _cx: &AppContext) -> FocusHandle {
12073        self.focus_handle.clone()
12074    }
12075}
12076
12077impl Render for Editor {
12078    fn render<'a>(&mut self, cx: &mut ViewContext<'a, Self>) -> impl IntoElement {
12079        let settings = ThemeSettings::get_global(cx);
12080
12081        let text_style = match self.mode {
12082            EditorMode::SingleLine | EditorMode::AutoHeight { .. } => TextStyle {
12083                color: cx.theme().colors().editor_foreground,
12084                font_family: settings.ui_font.family.clone(),
12085                font_features: settings.ui_font.features.clone(),
12086                font_size: rems(0.875).into(),
12087                font_weight: settings.ui_font.weight,
12088                font_style: FontStyle::Normal,
12089                line_height: relative(settings.buffer_line_height.value()),
12090                background_color: None,
12091                underline: None,
12092                strikethrough: None,
12093                white_space: WhiteSpace::Normal,
12094            },
12095            EditorMode::Full => TextStyle {
12096                color: cx.theme().colors().editor_foreground,
12097                font_family: settings.buffer_font.family.clone(),
12098                font_features: settings.buffer_font.features.clone(),
12099                font_size: settings.buffer_font_size(cx).into(),
12100                font_weight: settings.buffer_font.weight,
12101                font_style: FontStyle::Normal,
12102                line_height: relative(settings.buffer_line_height.value()),
12103                background_color: None,
12104                underline: None,
12105                strikethrough: None,
12106                white_space: WhiteSpace::Normal,
12107            },
12108        };
12109
12110        let background = match self.mode {
12111            EditorMode::SingleLine => cx.theme().system().transparent,
12112            EditorMode::AutoHeight { max_lines: _ } => cx.theme().system().transparent,
12113            EditorMode::Full => cx.theme().colors().editor_background,
12114        };
12115
12116        EditorElement::new(
12117            cx.view(),
12118            EditorStyle {
12119                background,
12120                local_player: cx.theme().players().local(),
12121                text: text_style,
12122                scrollbar_width: EditorElement::SCROLLBAR_WIDTH,
12123                syntax: cx.theme().syntax().clone(),
12124                status: cx.theme().status().clone(),
12125                inlay_hints_style: HighlightStyle {
12126                    color: Some(cx.theme().status().hint),
12127                    ..HighlightStyle::default()
12128                },
12129                suggestions_style: HighlightStyle {
12130                    color: Some(cx.theme().status().predictive),
12131                    ..HighlightStyle::default()
12132                },
12133            },
12134        )
12135    }
12136}
12137
12138impl ViewInputHandler for Editor {
12139    fn text_for_range(
12140        &mut self,
12141        range_utf16: Range<usize>,
12142        cx: &mut ViewContext<Self>,
12143    ) -> Option<String> {
12144        Some(
12145            self.buffer
12146                .read(cx)
12147                .read(cx)
12148                .text_for_range(OffsetUtf16(range_utf16.start)..OffsetUtf16(range_utf16.end))
12149                .collect(),
12150        )
12151    }
12152
12153    fn selected_text_range(&mut self, cx: &mut ViewContext<Self>) -> Option<Range<usize>> {
12154        // Prevent the IME menu from appearing when holding down an alphabetic key
12155        // while input is disabled.
12156        if !self.input_enabled {
12157            return None;
12158        }
12159
12160        let range = self.selections.newest::<OffsetUtf16>(cx).range();
12161        Some(range.start.0..range.end.0)
12162    }
12163
12164    fn marked_text_range(&self, cx: &mut ViewContext<Self>) -> Option<Range<usize>> {
12165        let snapshot = self.buffer.read(cx).read(cx);
12166        let range = self.text_highlights::<InputComposition>(cx)?.1.get(0)?;
12167        Some(range.start.to_offset_utf16(&snapshot).0..range.end.to_offset_utf16(&snapshot).0)
12168    }
12169
12170    fn unmark_text(&mut self, cx: &mut ViewContext<Self>) {
12171        self.clear_highlights::<InputComposition>(cx);
12172        self.ime_transaction.take();
12173    }
12174
12175    fn replace_text_in_range(
12176        &mut self,
12177        range_utf16: Option<Range<usize>>,
12178        text: &str,
12179        cx: &mut ViewContext<Self>,
12180    ) {
12181        if !self.input_enabled {
12182            cx.emit(EditorEvent::InputIgnored { text: text.into() });
12183            return;
12184        }
12185
12186        self.transact(cx, |this, cx| {
12187            let new_selected_ranges = if let Some(range_utf16) = range_utf16 {
12188                let range_utf16 = OffsetUtf16(range_utf16.start)..OffsetUtf16(range_utf16.end);
12189                Some(this.selection_replacement_ranges(range_utf16, cx))
12190            } else {
12191                this.marked_text_ranges(cx)
12192            };
12193
12194            let range_to_replace = new_selected_ranges.as_ref().and_then(|ranges_to_replace| {
12195                let newest_selection_id = this.selections.newest_anchor().id;
12196                this.selections
12197                    .all::<OffsetUtf16>(cx)
12198                    .iter()
12199                    .zip(ranges_to_replace.iter())
12200                    .find_map(|(selection, range)| {
12201                        if selection.id == newest_selection_id {
12202                            Some(
12203                                (range.start.0 as isize - selection.head().0 as isize)
12204                                    ..(range.end.0 as isize - selection.head().0 as isize),
12205                            )
12206                        } else {
12207                            None
12208                        }
12209                    })
12210            });
12211
12212            cx.emit(EditorEvent::InputHandled {
12213                utf16_range_to_replace: range_to_replace,
12214                text: text.into(),
12215            });
12216
12217            if let Some(new_selected_ranges) = new_selected_ranges {
12218                this.change_selections(None, cx, |selections| {
12219                    selections.select_ranges(new_selected_ranges)
12220                });
12221                this.backspace(&Default::default(), cx);
12222            }
12223
12224            this.handle_input(text, cx);
12225        });
12226
12227        if let Some(transaction) = self.ime_transaction {
12228            self.buffer.update(cx, |buffer, cx| {
12229                buffer.group_until_transaction(transaction, cx);
12230            });
12231        }
12232
12233        self.unmark_text(cx);
12234    }
12235
12236    fn replace_and_mark_text_in_range(
12237        &mut self,
12238        range_utf16: Option<Range<usize>>,
12239        text: &str,
12240        new_selected_range_utf16: Option<Range<usize>>,
12241        cx: &mut ViewContext<Self>,
12242    ) {
12243        if !self.input_enabled {
12244            return;
12245        }
12246
12247        let transaction = self.transact(cx, |this, cx| {
12248            let ranges_to_replace = if let Some(mut marked_ranges) = this.marked_text_ranges(cx) {
12249                let snapshot = this.buffer.read(cx).read(cx);
12250                if let Some(relative_range_utf16) = range_utf16.as_ref() {
12251                    for marked_range in &mut marked_ranges {
12252                        marked_range.end.0 = marked_range.start.0 + relative_range_utf16.end;
12253                        marked_range.start.0 += relative_range_utf16.start;
12254                        marked_range.start =
12255                            snapshot.clip_offset_utf16(marked_range.start, Bias::Left);
12256                        marked_range.end =
12257                            snapshot.clip_offset_utf16(marked_range.end, Bias::Right);
12258                    }
12259                }
12260                Some(marked_ranges)
12261            } else if let Some(range_utf16) = range_utf16 {
12262                let range_utf16 = OffsetUtf16(range_utf16.start)..OffsetUtf16(range_utf16.end);
12263                Some(this.selection_replacement_ranges(range_utf16, cx))
12264            } else {
12265                None
12266            };
12267
12268            let range_to_replace = ranges_to_replace.as_ref().and_then(|ranges_to_replace| {
12269                let newest_selection_id = this.selections.newest_anchor().id;
12270                this.selections
12271                    .all::<OffsetUtf16>(cx)
12272                    .iter()
12273                    .zip(ranges_to_replace.iter())
12274                    .find_map(|(selection, range)| {
12275                        if selection.id == newest_selection_id {
12276                            Some(
12277                                (range.start.0 as isize - selection.head().0 as isize)
12278                                    ..(range.end.0 as isize - selection.head().0 as isize),
12279                            )
12280                        } else {
12281                            None
12282                        }
12283                    })
12284            });
12285
12286            cx.emit(EditorEvent::InputHandled {
12287                utf16_range_to_replace: range_to_replace,
12288                text: text.into(),
12289            });
12290
12291            if let Some(ranges) = ranges_to_replace {
12292                this.change_selections(None, cx, |s| s.select_ranges(ranges));
12293            }
12294
12295            let marked_ranges = {
12296                let snapshot = this.buffer.read(cx).read(cx);
12297                this.selections
12298                    .disjoint_anchors()
12299                    .iter()
12300                    .map(|selection| {
12301                        selection.start.bias_left(&snapshot)..selection.end.bias_right(&snapshot)
12302                    })
12303                    .collect::<Vec<_>>()
12304            };
12305
12306            if text.is_empty() {
12307                this.unmark_text(cx);
12308            } else {
12309                this.highlight_text::<InputComposition>(
12310                    marked_ranges.clone(),
12311                    HighlightStyle {
12312                        underline: Some(UnderlineStyle {
12313                            thickness: px(1.),
12314                            color: None,
12315                            wavy: false,
12316                        }),
12317                        ..Default::default()
12318                    },
12319                    cx,
12320                );
12321            }
12322
12323            // Disable auto-closing when composing text (i.e. typing a `"` on a Brazilian keyboard)
12324            let use_autoclose = this.use_autoclose;
12325            let use_auto_surround = this.use_auto_surround;
12326            this.set_use_autoclose(false);
12327            this.set_use_auto_surround(false);
12328            this.handle_input(text, cx);
12329            this.set_use_autoclose(use_autoclose);
12330            this.set_use_auto_surround(use_auto_surround);
12331
12332            if let Some(new_selected_range) = new_selected_range_utf16 {
12333                let snapshot = this.buffer.read(cx).read(cx);
12334                let new_selected_ranges = marked_ranges
12335                    .into_iter()
12336                    .map(|marked_range| {
12337                        let insertion_start = marked_range.start.to_offset_utf16(&snapshot).0;
12338                        let new_start = OffsetUtf16(new_selected_range.start + insertion_start);
12339                        let new_end = OffsetUtf16(new_selected_range.end + insertion_start);
12340                        snapshot.clip_offset_utf16(new_start, Bias::Left)
12341                            ..snapshot.clip_offset_utf16(new_end, Bias::Right)
12342                    })
12343                    .collect::<Vec<_>>();
12344
12345                drop(snapshot);
12346                this.change_selections(None, cx, |selections| {
12347                    selections.select_ranges(new_selected_ranges)
12348                });
12349            }
12350        });
12351
12352        self.ime_transaction = self.ime_transaction.or(transaction);
12353        if let Some(transaction) = self.ime_transaction {
12354            self.buffer.update(cx, |buffer, cx| {
12355                buffer.group_until_transaction(transaction, cx);
12356            });
12357        }
12358
12359        if self.text_highlights::<InputComposition>(cx).is_none() {
12360            self.ime_transaction.take();
12361        }
12362    }
12363
12364    fn bounds_for_range(
12365        &mut self,
12366        range_utf16: Range<usize>,
12367        element_bounds: gpui::Bounds<Pixels>,
12368        cx: &mut ViewContext<Self>,
12369    ) -> Option<gpui::Bounds<Pixels>> {
12370        let text_layout_details = self.text_layout_details(cx);
12371        let style = &text_layout_details.editor_style;
12372        let font_id = cx.text_system().resolve_font(&style.text.font());
12373        let font_size = style.text.font_size.to_pixels(cx.rem_size());
12374        let line_height = style.text.line_height_in_pixels(cx.rem_size());
12375        let em_width = cx
12376            .text_system()
12377            .typographic_bounds(font_id, font_size, 'm')
12378            .unwrap()
12379            .size
12380            .width;
12381
12382        let snapshot = self.snapshot(cx);
12383        let scroll_position = snapshot.scroll_position();
12384        let scroll_left = scroll_position.x * em_width;
12385
12386        let start = OffsetUtf16(range_utf16.start).to_display_point(&snapshot);
12387        let x = snapshot.x_for_display_point(start, &text_layout_details) - scroll_left
12388            + self.gutter_dimensions.width;
12389        let y = line_height * (start.row().as_f32() - scroll_position.y);
12390
12391        Some(Bounds {
12392            origin: element_bounds.origin + point(x, y),
12393            size: size(em_width, line_height),
12394        })
12395    }
12396}
12397
12398trait SelectionExt {
12399    fn display_range(&self, map: &DisplaySnapshot) -> Range<DisplayPoint>;
12400    fn spanned_rows(
12401        &self,
12402        include_end_if_at_line_start: bool,
12403        map: &DisplaySnapshot,
12404    ) -> Range<MultiBufferRow>;
12405}
12406
12407impl<T: ToPoint + ToOffset> SelectionExt for Selection<T> {
12408    fn display_range(&self, map: &DisplaySnapshot) -> Range<DisplayPoint> {
12409        let start = self
12410            .start
12411            .to_point(&map.buffer_snapshot)
12412            .to_display_point(map);
12413        let end = self
12414            .end
12415            .to_point(&map.buffer_snapshot)
12416            .to_display_point(map);
12417        if self.reversed {
12418            end..start
12419        } else {
12420            start..end
12421        }
12422    }
12423
12424    fn spanned_rows(
12425        &self,
12426        include_end_if_at_line_start: bool,
12427        map: &DisplaySnapshot,
12428    ) -> Range<MultiBufferRow> {
12429        let start = self.start.to_point(&map.buffer_snapshot);
12430        let mut end = self.end.to_point(&map.buffer_snapshot);
12431        if !include_end_if_at_line_start && start.row != end.row && end.column == 0 {
12432            end.row -= 1;
12433        }
12434
12435        let buffer_start = map.prev_line_boundary(start).0;
12436        let buffer_end = map.next_line_boundary(end).0;
12437        MultiBufferRow(buffer_start.row)..MultiBufferRow(buffer_end.row + 1)
12438    }
12439}
12440
12441impl<T: InvalidationRegion> InvalidationStack<T> {
12442    fn invalidate<S>(&mut self, selections: &[Selection<S>], buffer: &MultiBufferSnapshot)
12443    where
12444        S: Clone + ToOffset,
12445    {
12446        while let Some(region) = self.last() {
12447            let all_selections_inside_invalidation_ranges =
12448                if selections.len() == region.ranges().len() {
12449                    selections
12450                        .iter()
12451                        .zip(region.ranges().iter().map(|r| r.to_offset(buffer)))
12452                        .all(|(selection, invalidation_range)| {
12453                            let head = selection.head().to_offset(buffer);
12454                            invalidation_range.start <= head && invalidation_range.end >= head
12455                        })
12456                } else {
12457                    false
12458                };
12459
12460            if all_selections_inside_invalidation_ranges {
12461                break;
12462            } else {
12463                self.pop();
12464            }
12465        }
12466    }
12467}
12468
12469impl<T> Default for InvalidationStack<T> {
12470    fn default() -> Self {
12471        Self(Default::default())
12472    }
12473}
12474
12475impl<T> Deref for InvalidationStack<T> {
12476    type Target = Vec<T>;
12477
12478    fn deref(&self) -> &Self::Target {
12479        &self.0
12480    }
12481}
12482
12483impl<T> DerefMut for InvalidationStack<T> {
12484    fn deref_mut(&mut self) -> &mut Self::Target {
12485        &mut self.0
12486    }
12487}
12488
12489impl InvalidationRegion for SnippetState {
12490    fn ranges(&self) -> &[Range<Anchor>] {
12491        &self.ranges[self.active_index]
12492    }
12493}
12494
12495pub fn diagnostic_block_renderer(diagnostic: Diagnostic, _is_valid: bool) -> RenderBlock {
12496    let (text_without_backticks, code_ranges) = highlight_diagnostic_message(&diagnostic);
12497
12498    Box::new(move |cx: &mut BlockContext| {
12499        let group_id: SharedString = cx.block_id.to_string().into();
12500
12501        let mut text_style = cx.text_style().clone();
12502        text_style.color = diagnostic_style(diagnostic.severity, true, cx.theme().status());
12503        let theme_settings = ThemeSettings::get_global(cx);
12504        text_style.font_family = theme_settings.buffer_font.family.clone();
12505        text_style.font_style = theme_settings.buffer_font.style;
12506        text_style.font_features = theme_settings.buffer_font.features.clone();
12507        text_style.font_weight = theme_settings.buffer_font.weight;
12508
12509        let multi_line_diagnostic = diagnostic.message.contains('\n');
12510
12511        let buttons = |diagnostic: &Diagnostic, block_id: usize| {
12512            if multi_line_diagnostic {
12513                v_flex()
12514            } else {
12515                h_flex()
12516            }
12517            .children(diagnostic.is_primary.then(|| {
12518                IconButton::new(("close-block", block_id), IconName::XCircle)
12519                    .icon_color(Color::Muted)
12520                    .size(ButtonSize::Compact)
12521                    .style(ButtonStyle::Transparent)
12522                    .visible_on_hover(group_id.clone())
12523                    .on_click(move |_click, cx| cx.dispatch_action(Box::new(Cancel)))
12524                    .tooltip(|cx| Tooltip::for_action("Close Diagnostics", &Cancel, cx))
12525            }))
12526            .child(
12527                IconButton::new(("copy-block", block_id), IconName::Copy)
12528                    .icon_color(Color::Muted)
12529                    .size(ButtonSize::Compact)
12530                    .style(ButtonStyle::Transparent)
12531                    .visible_on_hover(group_id.clone())
12532                    .on_click({
12533                        let message = diagnostic.message.clone();
12534                        move |_click, cx| cx.write_to_clipboard(ClipboardItem::new(message.clone()))
12535                    })
12536                    .tooltip(|cx| Tooltip::text("Copy diagnostic message", cx)),
12537            )
12538        };
12539
12540        let icon_size = buttons(&diagnostic, cx.block_id)
12541            .into_any_element()
12542            .layout_as_root(AvailableSpace::min_size(), cx);
12543
12544        h_flex()
12545            .id(cx.block_id)
12546            .group(group_id.clone())
12547            .relative()
12548            .size_full()
12549            .pl(cx.gutter_dimensions.width)
12550            .w(cx.max_width + cx.gutter_dimensions.width)
12551            .child(
12552                div()
12553                    .flex()
12554                    .w(cx.anchor_x - cx.gutter_dimensions.width - icon_size.width)
12555                    .flex_shrink(),
12556            )
12557            .child(buttons(&diagnostic, cx.block_id))
12558            .child(div().flex().flex_shrink_0().child(
12559                StyledText::new(text_without_backticks.clone()).with_highlights(
12560                    &text_style,
12561                    code_ranges.iter().map(|range| {
12562                        (
12563                            range.clone(),
12564                            HighlightStyle {
12565                                font_weight: Some(FontWeight::BOLD),
12566                                ..Default::default()
12567                            },
12568                        )
12569                    }),
12570                ),
12571            ))
12572            .into_any_element()
12573    })
12574}
12575
12576pub fn highlight_diagnostic_message(diagnostic: &Diagnostic) -> (SharedString, Vec<Range<usize>>) {
12577    let mut text_without_backticks = String::new();
12578    let mut code_ranges = Vec::new();
12579
12580    if let Some(source) = &diagnostic.source {
12581        text_without_backticks.push_str(&source);
12582        code_ranges.push(0..source.len());
12583        text_without_backticks.push_str(": ");
12584    }
12585
12586    let mut prev_offset = 0;
12587    let mut in_code_block = false;
12588    for (ix, _) in diagnostic
12589        .message
12590        .match_indices('`')
12591        .chain([(diagnostic.message.len(), "")])
12592    {
12593        let prev_len = text_without_backticks.len();
12594        text_without_backticks.push_str(&diagnostic.message[prev_offset..ix]);
12595        prev_offset = ix + 1;
12596        if in_code_block {
12597            code_ranges.push(prev_len..text_without_backticks.len());
12598            in_code_block = false;
12599        } else {
12600            in_code_block = true;
12601        }
12602    }
12603
12604    (text_without_backticks.into(), code_ranges)
12605}
12606
12607fn diagnostic_style(severity: DiagnosticSeverity, valid: bool, colors: &StatusColors) -> Hsla {
12608    match (severity, valid) {
12609        (DiagnosticSeverity::ERROR, true) => colors.error,
12610        (DiagnosticSeverity::ERROR, false) => colors.error,
12611        (DiagnosticSeverity::WARNING, true) => colors.warning,
12612        (DiagnosticSeverity::WARNING, false) => colors.warning,
12613        (DiagnosticSeverity::INFORMATION, true) => colors.info,
12614        (DiagnosticSeverity::INFORMATION, false) => colors.info,
12615        (DiagnosticSeverity::HINT, true) => colors.info,
12616        (DiagnosticSeverity::HINT, false) => colors.info,
12617        _ => colors.ignored,
12618    }
12619}
12620
12621pub fn styled_runs_for_code_label<'a>(
12622    label: &'a CodeLabel,
12623    syntax_theme: &'a theme::SyntaxTheme,
12624) -> impl 'a + Iterator<Item = (Range<usize>, HighlightStyle)> {
12625    let fade_out = HighlightStyle {
12626        fade_out: Some(0.35),
12627        ..Default::default()
12628    };
12629
12630    let mut prev_end = label.filter_range.end;
12631    label
12632        .runs
12633        .iter()
12634        .enumerate()
12635        .flat_map(move |(ix, (range, highlight_id))| {
12636            let style = if let Some(style) = highlight_id.style(syntax_theme) {
12637                style
12638            } else {
12639                return Default::default();
12640            };
12641            let mut muted_style = style;
12642            muted_style.highlight(fade_out);
12643
12644            let mut runs = SmallVec::<[(Range<usize>, HighlightStyle); 3]>::new();
12645            if range.start >= label.filter_range.end {
12646                if range.start > prev_end {
12647                    runs.push((prev_end..range.start, fade_out));
12648                }
12649                runs.push((range.clone(), muted_style));
12650            } else if range.end <= label.filter_range.end {
12651                runs.push((range.clone(), style));
12652            } else {
12653                runs.push((range.start..label.filter_range.end, style));
12654                runs.push((label.filter_range.end..range.end, muted_style));
12655            }
12656            prev_end = cmp::max(prev_end, range.end);
12657
12658            if ix + 1 == label.runs.len() && label.text.len() > prev_end {
12659                runs.push((prev_end..label.text.len(), fade_out));
12660            }
12661
12662            runs
12663        })
12664}
12665
12666pub(crate) fn split_words(text: &str) -> impl std::iter::Iterator<Item = &str> + '_ {
12667    let mut prev_index = 0;
12668    let mut prev_codepoint: Option<char> = None;
12669    text.char_indices()
12670        .chain([(text.len(), '\0')])
12671        .filter_map(move |(index, codepoint)| {
12672            let prev_codepoint = prev_codepoint.replace(codepoint)?;
12673            let is_boundary = index == text.len()
12674                || !prev_codepoint.is_uppercase() && codepoint.is_uppercase()
12675                || !prev_codepoint.is_alphanumeric() && codepoint.is_alphanumeric();
12676            if is_boundary {
12677                let chunk = &text[prev_index..index];
12678                prev_index = index;
12679                Some(chunk)
12680            } else {
12681                None
12682            }
12683        })
12684}
12685
12686trait RangeToAnchorExt {
12687    fn to_anchors(self, snapshot: &MultiBufferSnapshot) -> Range<Anchor>;
12688}
12689
12690impl<T: ToOffset> RangeToAnchorExt for Range<T> {
12691    fn to_anchors(self, snapshot: &MultiBufferSnapshot) -> Range<Anchor> {
12692        let start_offset = self.start.to_offset(snapshot);
12693        let end_offset = self.end.to_offset(snapshot);
12694        if start_offset == end_offset {
12695            snapshot.anchor_before(start_offset)..snapshot.anchor_before(end_offset)
12696        } else {
12697            snapshot.anchor_after(self.start)..snapshot.anchor_before(self.end)
12698        }
12699    }
12700}
12701
12702pub trait RowExt {
12703    fn as_f32(&self) -> f32;
12704
12705    fn next_row(&self) -> Self;
12706
12707    fn previous_row(&self) -> Self;
12708
12709    fn minus(&self, other: Self) -> u32;
12710}
12711
12712impl RowExt for DisplayRow {
12713    fn as_f32(&self) -> f32 {
12714        self.0 as f32
12715    }
12716
12717    fn next_row(&self) -> Self {
12718        Self(self.0 + 1)
12719    }
12720
12721    fn previous_row(&self) -> Self {
12722        Self(self.0.saturating_sub(1))
12723    }
12724
12725    fn minus(&self, other: Self) -> u32 {
12726        self.0 - other.0
12727    }
12728}
12729
12730impl RowExt for MultiBufferRow {
12731    fn as_f32(&self) -> f32 {
12732        self.0 as f32
12733    }
12734
12735    fn next_row(&self) -> Self {
12736        Self(self.0 + 1)
12737    }
12738
12739    fn previous_row(&self) -> Self {
12740        Self(self.0.saturating_sub(1))
12741    }
12742
12743    fn minus(&self, other: Self) -> u32 {
12744        self.0 - other.0
12745    }
12746}
12747
12748trait RowRangeExt {
12749    type Row;
12750
12751    fn len(&self) -> usize;
12752
12753    fn iter_rows(&self) -> impl DoubleEndedIterator<Item = Self::Row>;
12754}
12755
12756impl RowRangeExt for Range<MultiBufferRow> {
12757    type Row = MultiBufferRow;
12758
12759    fn len(&self) -> usize {
12760        (self.end.0 - self.start.0) as usize
12761    }
12762
12763    fn iter_rows(&self) -> impl DoubleEndedIterator<Item = MultiBufferRow> {
12764        (self.start.0..self.end.0).map(MultiBufferRow)
12765    }
12766}
12767
12768impl RowRangeExt for Range<DisplayRow> {
12769    type Row = DisplayRow;
12770
12771    fn len(&self) -> usize {
12772        (self.end.0 - self.start.0) as usize
12773    }
12774
12775    fn iter_rows(&self) -> impl DoubleEndedIterator<Item = DisplayRow> {
12776        (self.start.0..self.end.0).map(DisplayRow)
12777    }
12778}
12779
12780fn hunk_status(hunk: &DiffHunk<MultiBufferRow>) -> DiffHunkStatus {
12781    if hunk.diff_base_byte_range.is_empty() {
12782        DiffHunkStatus::Added
12783    } else if hunk.associated_range.is_empty() {
12784        DiffHunkStatus::Removed
12785    } else {
12786        DiffHunkStatus::Modified
12787    }
12788}