1use crate::{
   2    Anchor, Autoscroll, Editor, EditorEvent, EditorSettings, ExcerptId, ExcerptRange, FormatTarget,
   3    MultiBuffer, MultiBufferSnapshot, NavigationData, ReportEditorEvent, SearchWithinRange,
   4    SelectionEffects, ToPoint as _,
   5    display_map::HighlightKey,
   6    editor_settings::SeedQuerySetting,
   7    persistence::{DB, SerializedEditor},
   8    scroll::ScrollAnchor,
   9};
  10use anyhow::{Context as _, Result, anyhow};
  11use collections::{HashMap, HashSet};
  12use file_icons::FileIcons;
  13use futures::future::try_join_all;
  14use git::status::GitSummary;
  15use gpui::{
  16    AnyElement, App, AsyncWindowContext, Context, Entity, EntityId, EventEmitter, IntoElement,
  17    ParentElement, Pixels, SharedString, Styled, Task, WeakEntity, Window, point,
  18};
  19use language::{
  20    Bias, Buffer, BufferRow, CharKind, CharScopeContext, DiskState, LocalFile, Point,
  21    SelectionGoal, proto::serialize_anchor as serialize_text_anchor,
  22};
  23use lsp::DiagnosticSeverity;
  24use project::{
  25    Project, ProjectItem as _, ProjectPath, lsp_store::FormatTrigger,
  26    project_settings::ProjectSettings, search::SearchQuery,
  27};
  28use rpc::proto::{self, update_view};
  29use settings::Settings;
  30use std::{
  31    any::TypeId,
  32    borrow::Cow,
  33    cmp::{self, Ordering},
  34    iter,
  35    ops::Range,
  36    path::{Path, PathBuf},
  37    sync::Arc,
  38};
  39use text::{BufferId, BufferSnapshot, Selection};
  40use theme::{Theme, ThemeSettings};
  41use ui::{IconDecorationKind, prelude::*};
  42use util::{ResultExt, TryFutureExt, paths::PathExt};
  43use workspace::{
  44    CollaboratorId, ItemId, ItemNavHistory, ToolbarItemLocation, ViewId, Workspace, WorkspaceId,
  45    invalid_buffer_view::InvalidBufferView,
  46    item::{FollowableItem, Item, ItemEvent, ProjectItem, SaveOptions},
  47    searchable::{
  48        Direction, FilteredSearchRange, SearchEvent, SearchableItem, SearchableItemHandle,
  49    },
  50};
  51use workspace::{
  52    OpenOptions,
  53    item::{Dedup, ItemSettings, SerializableItem, TabContentParams},
  54};
  55use workspace::{
  56    OpenVisible, Pane, WorkspaceSettings,
  57    item::{BreadcrumbText, FollowEvent, ProjectItemKind},
  58    searchable::SearchOptions,
  59};
  60
  61pub const MAX_TAB_TITLE_LEN: usize = 24;
  62
  63impl FollowableItem for Editor {
  64    fn remote_id(&self) -> Option<ViewId> {
  65        self.remote_id
  66    }
  67
  68    fn from_state_proto(
  69        workspace: Entity<Workspace>,
  70        remote_id: ViewId,
  71        state: &mut Option<proto::view::Variant>,
  72        window: &mut Window,
  73        cx: &mut App,
  74    ) -> Option<Task<Result<Entity<Self>>>> {
  75        let project = workspace.read(cx).project().to_owned();
  76        let Some(proto::view::Variant::Editor(_)) = state else {
  77            return None;
  78        };
  79        let Some(proto::view::Variant::Editor(state)) = state.take() else {
  80            unreachable!()
  81        };
  82
  83        let buffer_ids = state
  84            .excerpts
  85            .iter()
  86            .map(|excerpt| excerpt.buffer_id)
  87            .collect::<HashSet<_>>();
  88        let buffers = project.update(cx, |project, cx| {
  89            buffer_ids
  90                .iter()
  91                .map(|id| BufferId::new(*id).map(|id| project.open_buffer_by_id(id, cx)))
  92                .collect::<Result<Vec<_>>>()
  93        });
  94
  95        Some(window.spawn(cx, async move |cx| {
  96            let mut buffers = futures::future::try_join_all(buffers?)
  97                .await
  98                .debug_assert_ok("leaders don't share views for unshared buffers")?;
  99
 100            let editor = cx.update(|window, cx| {
 101                let multibuffer = cx.new(|cx| {
 102                    let mut multibuffer;
 103                    if state.singleton && buffers.len() == 1 {
 104                        multibuffer = MultiBuffer::singleton(buffers.pop().unwrap(), cx)
 105                    } else {
 106                        multibuffer = MultiBuffer::new(project.read(cx).capability());
 107                        let mut sorted_excerpts = state.excerpts.clone();
 108                        sorted_excerpts.sort_by_key(|e| e.id);
 109                        let sorted_excerpts = sorted_excerpts.into_iter().peekable();
 110
 111                        for excerpt in sorted_excerpts {
 112                            let Ok(buffer_id) = BufferId::new(excerpt.buffer_id) else {
 113                                continue;
 114                            };
 115
 116                            let mut insert_position = ExcerptId::min();
 117                            for e in &state.excerpts {
 118                                if e.id == excerpt.id {
 119                                    break;
 120                                }
 121                                if e.id < excerpt.id {
 122                                    insert_position = ExcerptId::from_proto(e.id);
 123                                }
 124                            }
 125
 126                            let buffer =
 127                                buffers.iter().find(|b| b.read(cx).remote_id() == buffer_id);
 128
 129                            let Some(excerpt) = deserialize_excerpt_range(excerpt) else {
 130                                continue;
 131                            };
 132
 133                            let Some(buffer) = buffer else { continue };
 134
 135                            multibuffer.insert_excerpts_with_ids_after(
 136                                insert_position,
 137                                buffer.clone(),
 138                                [excerpt],
 139                                cx,
 140                            );
 141                        }
 142                    };
 143
 144                    if let Some(title) = &state.title {
 145                        multibuffer = multibuffer.with_title(title.clone())
 146                    }
 147
 148                    multibuffer
 149                });
 150
 151                cx.new(|cx| {
 152                    let mut editor =
 153                        Editor::for_multibuffer(multibuffer, Some(project.clone()), window, cx);
 154                    editor.remote_id = Some(remote_id);
 155                    editor
 156                })
 157            })?;
 158
 159            update_editor_from_message(
 160                editor.downgrade(),
 161                project,
 162                proto::update_view::Editor {
 163                    selections: state.selections,
 164                    pending_selection: state.pending_selection,
 165                    scroll_top_anchor: state.scroll_top_anchor,
 166                    scroll_x: state.scroll_x,
 167                    scroll_y: state.scroll_y,
 168                    ..Default::default()
 169                },
 170                cx,
 171            )
 172            .await?;
 173
 174            Ok(editor)
 175        }))
 176    }
 177
 178    fn set_leader_id(
 179        &mut self,
 180        leader_id: Option<CollaboratorId>,
 181        window: &mut Window,
 182        cx: &mut Context<Self>,
 183    ) {
 184        self.leader_id = leader_id;
 185        if self.leader_id.is_some() {
 186            self.buffer.update(cx, |buffer, cx| {
 187                buffer.remove_active_selections(cx);
 188            });
 189        } else if self.focus_handle.is_focused(window) {
 190            self.buffer.update(cx, |buffer, cx| {
 191                buffer.set_active_selections(
 192                    &self.selections.disjoint_anchors_arc(),
 193                    self.selections.line_mode(),
 194                    self.cursor_shape,
 195                    cx,
 196                );
 197            });
 198        }
 199        cx.notify();
 200    }
 201
 202    fn to_state_proto(&self, _: &Window, cx: &App) -> Option<proto::view::Variant> {
 203        let buffer = self.buffer.read(cx);
 204        if buffer
 205            .as_singleton()
 206            .and_then(|buffer| buffer.read(cx).file())
 207            .is_some_and(|file| file.is_private())
 208        {
 209            return None;
 210        }
 211
 212        let scroll_anchor = self.scroll_manager.anchor();
 213        let excerpts = buffer
 214            .read(cx)
 215            .excerpts()
 216            .map(|(id, buffer, range)| proto::Excerpt {
 217                id: id.to_proto(),
 218                buffer_id: buffer.remote_id().into(),
 219                context_start: Some(serialize_text_anchor(&range.context.start)),
 220                context_end: Some(serialize_text_anchor(&range.context.end)),
 221                primary_start: Some(serialize_text_anchor(&range.primary.start)),
 222                primary_end: Some(serialize_text_anchor(&range.primary.end)),
 223            })
 224            .collect();
 225        let snapshot = buffer.snapshot(cx);
 226
 227        Some(proto::view::Variant::Editor(proto::view::Editor {
 228            singleton: buffer.is_singleton(),
 229            title: (!buffer.is_singleton()).then(|| buffer.title(cx).into()),
 230            excerpts,
 231            scroll_top_anchor: Some(serialize_anchor(&scroll_anchor.anchor, &snapshot)),
 232            scroll_x: scroll_anchor.offset.x,
 233            scroll_y: scroll_anchor.offset.y,
 234            selections: self
 235                .selections
 236                .disjoint_anchors_arc()
 237                .iter()
 238                .map(|s| serialize_selection(s, &snapshot))
 239                .collect(),
 240            pending_selection: self
 241                .selections
 242                .pending_anchor()
 243                .as_ref()
 244                .map(|s| serialize_selection(s, &snapshot)),
 245        }))
 246    }
 247
 248    fn to_follow_event(event: &EditorEvent) -> Option<workspace::item::FollowEvent> {
 249        match event {
 250            EditorEvent::Edited { .. } => Some(FollowEvent::Unfollow),
 251            EditorEvent::SelectionsChanged { local }
 252            | EditorEvent::ScrollPositionChanged { local, .. } => {
 253                if *local {
 254                    Some(FollowEvent::Unfollow)
 255                } else {
 256                    None
 257                }
 258            }
 259            _ => None,
 260        }
 261    }
 262
 263    fn add_event_to_update_proto(
 264        &self,
 265        event: &EditorEvent,
 266        update: &mut Option<proto::update_view::Variant>,
 267        _: &Window,
 268        cx: &App,
 269    ) -> bool {
 270        let update =
 271            update.get_or_insert_with(|| proto::update_view::Variant::Editor(Default::default()));
 272
 273        match update {
 274            proto::update_view::Variant::Editor(update) => match event {
 275                EditorEvent::ExcerptsAdded {
 276                    buffer,
 277                    predecessor,
 278                    excerpts,
 279                } => {
 280                    let buffer_id = buffer.read(cx).remote_id();
 281                    let mut excerpts = excerpts.iter();
 282                    if let Some((id, range)) = excerpts.next() {
 283                        update.inserted_excerpts.push(proto::ExcerptInsertion {
 284                            previous_excerpt_id: Some(predecessor.to_proto()),
 285                            excerpt: serialize_excerpt(buffer_id, id, range),
 286                        });
 287                        update.inserted_excerpts.extend(excerpts.map(|(id, range)| {
 288                            proto::ExcerptInsertion {
 289                                previous_excerpt_id: None,
 290                                excerpt: serialize_excerpt(buffer_id, id, range),
 291                            }
 292                        }))
 293                    }
 294                    true
 295                }
 296                EditorEvent::ExcerptsRemoved { ids, .. } => {
 297                    update
 298                        .deleted_excerpts
 299                        .extend(ids.iter().copied().map(ExcerptId::to_proto));
 300                    true
 301                }
 302                EditorEvent::ScrollPositionChanged { autoscroll, .. } if !autoscroll => {
 303                    let snapshot = self.buffer.read(cx).snapshot(cx);
 304                    let scroll_anchor = self.scroll_manager.anchor();
 305                    update.scroll_top_anchor =
 306                        Some(serialize_anchor(&scroll_anchor.anchor, &snapshot));
 307                    update.scroll_x = scroll_anchor.offset.x;
 308                    update.scroll_y = scroll_anchor.offset.y;
 309                    true
 310                }
 311                EditorEvent::SelectionsChanged { .. } => {
 312                    let snapshot = self.buffer.read(cx).snapshot(cx);
 313                    update.selections = self
 314                        .selections
 315                        .disjoint_anchors_arc()
 316                        .iter()
 317                        .map(|s| serialize_selection(s, &snapshot))
 318                        .collect();
 319                    update.pending_selection = self
 320                        .selections
 321                        .pending_anchor()
 322                        .as_ref()
 323                        .map(|s| serialize_selection(s, &snapshot));
 324                    true
 325                }
 326                _ => false,
 327            },
 328        }
 329    }
 330
 331    fn apply_update_proto(
 332        &mut self,
 333        project: &Entity<Project>,
 334        message: update_view::Variant,
 335        window: &mut Window,
 336        cx: &mut Context<Self>,
 337    ) -> Task<Result<()>> {
 338        let update_view::Variant::Editor(message) = message;
 339        let project = project.clone();
 340        cx.spawn_in(window, async move |this, cx| {
 341            update_editor_from_message(this, project, message, cx).await
 342        })
 343    }
 344
 345    fn is_project_item(&self, _window: &Window, _cx: &App) -> bool {
 346        true
 347    }
 348
 349    fn dedup(&self, existing: &Self, _: &Window, cx: &App) -> Option<Dedup> {
 350        let self_singleton = self.buffer.read(cx).as_singleton()?;
 351        let other_singleton = existing.buffer.read(cx).as_singleton()?;
 352        if self_singleton == other_singleton {
 353            Some(Dedup::KeepExisting)
 354        } else {
 355            None
 356        }
 357    }
 358
 359    fn update_agent_location(
 360        &mut self,
 361        location: language::Anchor,
 362        window: &mut Window,
 363        cx: &mut Context<Self>,
 364    ) {
 365        let buffer = self.buffer.read(cx);
 366        let buffer = buffer.read(cx);
 367        let Some((excerpt_id, _, _)) = buffer.as_singleton() else {
 368            return;
 369        };
 370        let position = buffer.anchor_in_excerpt(*excerpt_id, location).unwrap();
 371        let selection = Selection {
 372            id: 0,
 373            reversed: false,
 374            start: position,
 375            end: position,
 376            goal: SelectionGoal::None,
 377        };
 378        drop(buffer);
 379        self.set_selections_from_remote(vec![selection], None, window, cx);
 380        self.request_autoscroll_remotely(Autoscroll::fit(), cx);
 381    }
 382}
 383
 384async fn update_editor_from_message(
 385    this: WeakEntity<Editor>,
 386    project: Entity<Project>,
 387    message: proto::update_view::Editor,
 388    cx: &mut AsyncWindowContext,
 389) -> Result<()> {
 390    // Open all of the buffers of which excerpts were added to the editor.
 391    let inserted_excerpt_buffer_ids = message
 392        .inserted_excerpts
 393        .iter()
 394        .filter_map(|insertion| Some(insertion.excerpt.as_ref()?.buffer_id))
 395        .collect::<HashSet<_>>();
 396    let inserted_excerpt_buffers = project.update(cx, |project, cx| {
 397        inserted_excerpt_buffer_ids
 398            .into_iter()
 399            .map(|id| BufferId::new(id).map(|id| project.open_buffer_by_id(id, cx)))
 400            .collect::<Result<Vec<_>>>()
 401    })??;
 402    let _inserted_excerpt_buffers = try_join_all(inserted_excerpt_buffers).await?;
 403
 404    // Update the editor's excerpts.
 405    this.update(cx, |editor, cx| {
 406        editor.buffer.update(cx, |multibuffer, cx| {
 407            let mut removed_excerpt_ids = message
 408                .deleted_excerpts
 409                .into_iter()
 410                .map(ExcerptId::from_proto)
 411                .collect::<Vec<_>>();
 412            removed_excerpt_ids.sort_by({
 413                let multibuffer = multibuffer.read(cx);
 414                move |a, b| a.cmp(b, &multibuffer)
 415            });
 416
 417            let mut insertions = message.inserted_excerpts.into_iter().peekable();
 418            while let Some(insertion) = insertions.next() {
 419                let Some(excerpt) = insertion.excerpt else {
 420                    continue;
 421                };
 422                let Some(previous_excerpt_id) = insertion.previous_excerpt_id else {
 423                    continue;
 424                };
 425                let buffer_id = BufferId::new(excerpt.buffer_id)?;
 426                let Some(buffer) = project.read(cx).buffer_for_id(buffer_id, cx) else {
 427                    continue;
 428                };
 429
 430                let adjacent_excerpts = iter::from_fn(|| {
 431                    let insertion = insertions.peek()?;
 432                    if insertion.previous_excerpt_id.is_none()
 433                        && insertion.excerpt.as_ref()?.buffer_id == u64::from(buffer_id)
 434                    {
 435                        insertions.next()?.excerpt
 436                    } else {
 437                        None
 438                    }
 439                });
 440
 441                multibuffer.insert_excerpts_with_ids_after(
 442                    ExcerptId::from_proto(previous_excerpt_id),
 443                    buffer,
 444                    [excerpt]
 445                        .into_iter()
 446                        .chain(adjacent_excerpts)
 447                        .filter_map(deserialize_excerpt_range),
 448                    cx,
 449                );
 450            }
 451
 452            multibuffer.remove_excerpts(removed_excerpt_ids, cx);
 453            anyhow::Ok(())
 454        })
 455    })??;
 456
 457    // Deserialize the editor state.
 458    let (selections, pending_selection, scroll_top_anchor) = this.update(cx, |editor, cx| {
 459        let buffer = editor.buffer.read(cx).read(cx);
 460        let selections = message
 461            .selections
 462            .into_iter()
 463            .filter_map(|selection| deserialize_selection(&buffer, selection))
 464            .collect::<Vec<_>>();
 465        let pending_selection = message
 466            .pending_selection
 467            .and_then(|selection| deserialize_selection(&buffer, selection));
 468        let scroll_top_anchor = message
 469            .scroll_top_anchor
 470            .and_then(|anchor| deserialize_anchor(&buffer, anchor));
 471        anyhow::Ok((selections, pending_selection, scroll_top_anchor))
 472    })??;
 473
 474    // Wait until the buffer has received all of the operations referenced by
 475    // the editor's new state.
 476    this.update(cx, |editor, cx| {
 477        editor.buffer.update(cx, |buffer, cx| {
 478            buffer.wait_for_anchors(
 479                selections
 480                    .iter()
 481                    .chain(pending_selection.as_ref())
 482                    .flat_map(|selection| [selection.start, selection.end])
 483                    .chain(scroll_top_anchor),
 484                cx,
 485            )
 486        })
 487    })?
 488    .await?;
 489
 490    // Update the editor's state.
 491    this.update_in(cx, |editor, window, cx| {
 492        if !selections.is_empty() || pending_selection.is_some() {
 493            editor.set_selections_from_remote(selections, pending_selection, window, cx);
 494            editor.request_autoscroll_remotely(Autoscroll::newest(), cx);
 495        } else if let Some(scroll_top_anchor) = scroll_top_anchor {
 496            editor.set_scroll_anchor_remote(
 497                ScrollAnchor {
 498                    anchor: scroll_top_anchor,
 499                    offset: point(message.scroll_x, message.scroll_y),
 500                },
 501                window,
 502                cx,
 503            );
 504        }
 505    })?;
 506    Ok(())
 507}
 508
 509fn serialize_excerpt(
 510    buffer_id: BufferId,
 511    id: &ExcerptId,
 512    range: &ExcerptRange<language::Anchor>,
 513) -> Option<proto::Excerpt> {
 514    Some(proto::Excerpt {
 515        id: id.to_proto(),
 516        buffer_id: buffer_id.into(),
 517        context_start: Some(serialize_text_anchor(&range.context.start)),
 518        context_end: Some(serialize_text_anchor(&range.context.end)),
 519        primary_start: Some(serialize_text_anchor(&range.primary.start)),
 520        primary_end: Some(serialize_text_anchor(&range.primary.end)),
 521    })
 522}
 523
 524fn serialize_selection(
 525    selection: &Selection<Anchor>,
 526    buffer: &MultiBufferSnapshot,
 527) -> proto::Selection {
 528    proto::Selection {
 529        id: selection.id as u64,
 530        start: Some(serialize_anchor(&selection.start, buffer)),
 531        end: Some(serialize_anchor(&selection.end, buffer)),
 532        reversed: selection.reversed,
 533    }
 534}
 535
 536fn serialize_anchor(anchor: &Anchor, buffer: &MultiBufferSnapshot) -> proto::EditorAnchor {
 537    proto::EditorAnchor {
 538        excerpt_id: buffer.latest_excerpt_id(anchor.excerpt_id).to_proto(),
 539        anchor: Some(serialize_text_anchor(&anchor.text_anchor)),
 540    }
 541}
 542
 543fn deserialize_excerpt_range(
 544    excerpt: proto::Excerpt,
 545) -> Option<(ExcerptId, ExcerptRange<language::Anchor>)> {
 546    let context = {
 547        let start = language::proto::deserialize_anchor(excerpt.context_start?)?;
 548        let end = language::proto::deserialize_anchor(excerpt.context_end?)?;
 549        start..end
 550    };
 551    let primary = excerpt
 552        .primary_start
 553        .zip(excerpt.primary_end)
 554        .and_then(|(start, end)| {
 555            let start = language::proto::deserialize_anchor(start)?;
 556            let end = language::proto::deserialize_anchor(end)?;
 557            Some(start..end)
 558        })
 559        .unwrap_or_else(|| context.clone());
 560    Some((
 561        ExcerptId::from_proto(excerpt.id),
 562        ExcerptRange { context, primary },
 563    ))
 564}
 565
 566fn deserialize_selection(
 567    buffer: &MultiBufferSnapshot,
 568    selection: proto::Selection,
 569) -> Option<Selection<Anchor>> {
 570    Some(Selection {
 571        id: selection.id as usize,
 572        start: deserialize_anchor(buffer, selection.start?)?,
 573        end: deserialize_anchor(buffer, selection.end?)?,
 574        reversed: selection.reversed,
 575        goal: SelectionGoal::None,
 576    })
 577}
 578
 579fn deserialize_anchor(buffer: &MultiBufferSnapshot, anchor: proto::EditorAnchor) -> Option<Anchor> {
 580    let excerpt_id = ExcerptId::from_proto(anchor.excerpt_id);
 581    Some(Anchor {
 582        excerpt_id,
 583        text_anchor: language::proto::deserialize_anchor(anchor.anchor?)?,
 584        buffer_id: buffer.buffer_id_for_excerpt(excerpt_id),
 585        diff_base_anchor: None,
 586    })
 587}
 588
 589impl Item for Editor {
 590    type Event = EditorEvent;
 591
 592    fn navigate(
 593        &mut self,
 594        data: Box<dyn std::any::Any>,
 595        window: &mut Window,
 596        cx: &mut Context<Self>,
 597    ) -> bool {
 598        if let Ok(data) = data.downcast::<NavigationData>() {
 599            let newest_selection = self.selections.newest::<Point>(cx);
 600            let buffer = self.buffer.read(cx).read(cx);
 601            let offset = if buffer.can_resolve(&data.cursor_anchor) {
 602                data.cursor_anchor.to_point(&buffer)
 603            } else {
 604                buffer.clip_point(data.cursor_position, Bias::Left)
 605            };
 606
 607            let mut scroll_anchor = data.scroll_anchor;
 608            if !buffer.can_resolve(&scroll_anchor.anchor) {
 609                scroll_anchor.anchor = buffer.anchor_before(
 610                    buffer.clip_point(Point::new(data.scroll_top_row, 0), Bias::Left),
 611                );
 612            }
 613
 614            drop(buffer);
 615
 616            if newest_selection.head() == offset {
 617                false
 618            } else {
 619                self.set_scroll_anchor(scroll_anchor, window, cx);
 620                self.change_selections(
 621                    SelectionEffects::default().nav_history(false),
 622                    window,
 623                    cx,
 624                    |s| s.select_ranges([offset..offset]),
 625                );
 626                true
 627            }
 628        } else {
 629            false
 630        }
 631    }
 632
 633    fn tab_tooltip_text(&self, cx: &App) -> Option<SharedString> {
 634        let file_path = self
 635            .buffer()
 636            .read(cx)
 637            .as_singleton()?
 638            .read(cx)
 639            .file()
 640            .and_then(|f| f.as_local())?
 641            .abs_path(cx);
 642
 643        let file_path = file_path.compact().to_string_lossy().to_string();
 644
 645        Some(file_path.into())
 646    }
 647
 648    fn telemetry_event_text(&self) -> Option<&'static str> {
 649        None
 650    }
 651
 652    fn tab_content_text(&self, detail: usize, cx: &App) -> SharedString {
 653        if let Some(path) = path_for_buffer(&self.buffer, detail, true, cx) {
 654            path.to_string().into()
 655        } else {
 656            // Use the same logic as the displayed title for consistency
 657            self.buffer.read(cx).title(cx).to_string().into()
 658        }
 659    }
 660
 661    fn suggested_filename(&self, cx: &App) -> SharedString {
 662        self.buffer.read(cx).title(cx).to_string().into()
 663    }
 664
 665    fn tab_icon(&self, _: &Window, cx: &App) -> Option<Icon> {
 666        ItemSettings::get_global(cx)
 667            .file_icons
 668            .then(|| {
 669                path_for_buffer(&self.buffer, 0, true, cx)
 670                    .and_then(|path| FileIcons::get_icon(Path::new(&*path), cx))
 671            })
 672            .flatten()
 673            .map(Icon::from_path)
 674    }
 675
 676    fn tab_content(&self, params: TabContentParams, _: &Window, cx: &App) -> AnyElement {
 677        let label_color = if ItemSettings::get_global(cx).git_status {
 678            self.buffer()
 679                .read(cx)
 680                .as_singleton()
 681                .and_then(|buffer| {
 682                    let buffer = buffer.read(cx);
 683                    let path = buffer.project_path(cx)?;
 684                    let buffer_id = buffer.remote_id();
 685                    let project = self.project()?.read(cx);
 686                    let entry = project.entry_for_path(&path, cx)?;
 687                    let (repo, repo_path) = project
 688                        .git_store()
 689                        .read(cx)
 690                        .repository_and_path_for_buffer_id(buffer_id, cx)?;
 691                    let status = repo.read(cx).status_for_path(&repo_path)?.status;
 692
 693                    Some(entry_git_aware_label_color(
 694                        status.summary(),
 695                        entry.is_ignored,
 696                        params.selected,
 697                    ))
 698                })
 699                .unwrap_or_else(|| entry_label_color(params.selected))
 700        } else {
 701            entry_label_color(params.selected)
 702        };
 703
 704        let description = params.detail.and_then(|detail| {
 705            let path = path_for_buffer(&self.buffer, detail, false, cx)?;
 706            let description = path.trim();
 707
 708            if description.is_empty() {
 709                return None;
 710            }
 711
 712            Some(util::truncate_and_trailoff(description, MAX_TAB_TITLE_LEN))
 713        });
 714
 715        // Whether the file was saved in the past but is now deleted.
 716        let was_deleted: bool = self
 717            .buffer()
 718            .read(cx)
 719            .as_singleton()
 720            .and_then(|buffer| buffer.read(cx).file())
 721            .is_some_and(|file| file.disk_state() == DiskState::Deleted);
 722
 723        h_flex()
 724            .gap_2()
 725            .child(
 726                Label::new(self.title(cx).to_string())
 727                    .color(label_color)
 728                    .when(params.preview, |this| this.italic())
 729                    .when(was_deleted, |this| this.strikethrough()),
 730            )
 731            .when_some(description, |this, description| {
 732                this.child(
 733                    Label::new(description)
 734                        .size(LabelSize::XSmall)
 735                        .color(Color::Muted),
 736                )
 737            })
 738            .into_any_element()
 739    }
 740
 741    fn for_each_project_item(
 742        &self,
 743        cx: &App,
 744        f: &mut dyn FnMut(EntityId, &dyn project::ProjectItem),
 745    ) {
 746        self.buffer
 747            .read(cx)
 748            .for_each_buffer(|buffer| f(buffer.entity_id(), buffer.read(cx)));
 749    }
 750
 751    fn is_singleton(&self, cx: &App) -> bool {
 752        self.buffer.read(cx).is_singleton()
 753    }
 754
 755    fn can_save_as(&self, cx: &App) -> bool {
 756        self.buffer.read(cx).is_singleton()
 757    }
 758
 759    fn clone_on_split(
 760        &self,
 761        _workspace_id: Option<WorkspaceId>,
 762        window: &mut Window,
 763        cx: &mut Context<Self>,
 764    ) -> Option<Entity<Editor>>
 765    where
 766        Self: Sized,
 767    {
 768        Some(cx.new(|cx| self.clone(window, cx)))
 769    }
 770
 771    fn set_nav_history(
 772        &mut self,
 773        history: ItemNavHistory,
 774        _window: &mut Window,
 775        _: &mut Context<Self>,
 776    ) {
 777        self.nav_history = Some(history);
 778    }
 779
 780    fn on_removed(&self, cx: &App) {
 781        self.report_editor_event(ReportEditorEvent::Closed, None, cx);
 782    }
 783
 784    fn deactivated(&mut self, _: &mut Window, cx: &mut Context<Self>) {
 785        let selection = self.selections.newest_anchor();
 786        self.push_to_nav_history(selection.head(), None, true, false, cx);
 787    }
 788
 789    fn workspace_deactivated(&mut self, _: &mut Window, cx: &mut Context<Self>) {
 790        self.hide_hovered_link(cx);
 791    }
 792
 793    fn is_dirty(&self, cx: &App) -> bool {
 794        self.buffer().read(cx).read(cx).is_dirty()
 795    }
 796
 797    fn has_deleted_file(&self, cx: &App) -> bool {
 798        self.buffer().read(cx).read(cx).has_deleted_file()
 799    }
 800
 801    fn has_conflict(&self, cx: &App) -> bool {
 802        self.buffer().read(cx).read(cx).has_conflict()
 803    }
 804
 805    fn can_save(&self, cx: &App) -> bool {
 806        let buffer = &self.buffer().read(cx);
 807        if let Some(buffer) = buffer.as_singleton() {
 808            buffer.read(cx).project_path(cx).is_some()
 809        } else {
 810            true
 811        }
 812    }
 813
 814    fn save(
 815        &mut self,
 816        options: SaveOptions,
 817        project: Entity<Project>,
 818        window: &mut Window,
 819        cx: &mut Context<Self>,
 820    ) -> Task<Result<()>> {
 821        // Add meta data tracking # of auto saves
 822        if options.autosave {
 823            self.report_editor_event(ReportEditorEvent::Saved { auto_saved: true }, None, cx);
 824        } else {
 825            self.report_editor_event(ReportEditorEvent::Saved { auto_saved: false }, None, cx);
 826        }
 827
 828        let buffers = self.buffer().clone().read(cx).all_buffers();
 829        let buffers = buffers
 830            .into_iter()
 831            .map(|handle| handle.read(cx).base_buffer().unwrap_or(handle.clone()))
 832            .collect::<HashSet<_>>();
 833
 834        // let mut buffers_to_save =
 835        let buffers_to_save = if self.buffer.read(cx).is_singleton() && !options.autosave {
 836            buffers.clone()
 837        } else {
 838            buffers
 839                .iter()
 840                .filter(|buffer| buffer.read(cx).is_dirty())
 841                .cloned()
 842                .collect()
 843        };
 844
 845        cx.spawn_in(window, async move |this, cx| {
 846            if options.format {
 847                this.update_in(cx, |editor, window, cx| {
 848                    editor.perform_format(
 849                        project.clone(),
 850                        FormatTrigger::Save,
 851                        FormatTarget::Buffers(buffers_to_save.clone()),
 852                        window,
 853                        cx,
 854                    )
 855                })?
 856                .await?;
 857            }
 858
 859            if !buffers_to_save.is_empty() {
 860                project
 861                    .update(cx, |project, cx| {
 862                        project.save_buffers(buffers_to_save.clone(), cx)
 863                    })?
 864                    .await?;
 865            }
 866
 867            // Notify about clean buffers for language server events
 868            let buffers_that_were_not_saved: Vec<_> = buffers
 869                .into_iter()
 870                .filter(|b| !buffers_to_save.contains(b))
 871                .collect();
 872
 873            for buffer in buffers_that_were_not_saved {
 874                buffer
 875                    .update(cx, |buffer, cx| {
 876                        let version = buffer.saved_version().clone();
 877                        let mtime = buffer.saved_mtime();
 878                        buffer.did_save(version, mtime, cx);
 879                    })
 880                    .ok();
 881            }
 882
 883            Ok(())
 884        })
 885    }
 886
 887    fn save_as(
 888        &mut self,
 889        project: Entity<Project>,
 890        path: ProjectPath,
 891        _: &mut Window,
 892        cx: &mut Context<Self>,
 893    ) -> Task<Result<()>> {
 894        let buffer = self
 895            .buffer()
 896            .read(cx)
 897            .as_singleton()
 898            .expect("cannot call save_as on an excerpt list");
 899
 900        let file_extension = path.path.extension().map(|a| a.to_string());
 901        self.report_editor_event(
 902            ReportEditorEvent::Saved { auto_saved: false },
 903            file_extension,
 904            cx,
 905        );
 906
 907        project.update(cx, |project, cx| project.save_buffer_as(buffer, path, cx))
 908    }
 909
 910    fn reload(
 911        &mut self,
 912        project: Entity<Project>,
 913        window: &mut Window,
 914        cx: &mut Context<Self>,
 915    ) -> Task<Result<()>> {
 916        let buffer = self.buffer().clone();
 917        let buffers = self.buffer.read(cx).all_buffers();
 918        let reload_buffers =
 919            project.update(cx, |project, cx| project.reload_buffers(buffers, true, cx));
 920        cx.spawn_in(window, async move |this, cx| {
 921            let transaction = reload_buffers.log_err().await;
 922            this.update(cx, |editor, cx| {
 923                editor.request_autoscroll(Autoscroll::fit(), cx)
 924            })?;
 925            buffer
 926                .update(cx, |buffer, cx| {
 927                    if let Some(transaction) = transaction
 928                        && !buffer.is_singleton()
 929                    {
 930                        buffer.push_transaction(&transaction.0, cx);
 931                    }
 932                })
 933                .ok();
 934            Ok(())
 935        })
 936    }
 937
 938    fn as_searchable(&self, handle: &Entity<Self>) -> Option<Box<dyn SearchableItemHandle>> {
 939        Some(Box::new(handle.clone()))
 940    }
 941
 942    fn pixel_position_of_cursor(&self, _: &App) -> Option<gpui::Point<Pixels>> {
 943        self.pixel_position_of_newest_cursor
 944    }
 945
 946    fn breadcrumb_location(&self, _: &App) -> ToolbarItemLocation {
 947        if self.show_breadcrumbs {
 948            ToolbarItemLocation::PrimaryLeft
 949        } else {
 950            ToolbarItemLocation::Hidden
 951        }
 952    }
 953
 954    fn breadcrumbs(&self, variant: &Theme, cx: &App) -> Option<Vec<BreadcrumbText>> {
 955        let cursor = self.selections.newest_anchor().head();
 956        let multibuffer = &self.buffer().read(cx);
 957        let (buffer_id, symbols) =
 958            multibuffer.symbols_containing(cursor, Some(variant.syntax()), cx)?;
 959        let buffer = multibuffer.buffer(buffer_id)?;
 960
 961        let buffer = buffer.read(cx);
 962        let text = self.breadcrumb_header.clone().unwrap_or_else(|| {
 963            buffer
 964                .snapshot()
 965                .resolve_file_path(
 966                    cx,
 967                    self.project
 968                        .as_ref()
 969                        .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
 970                        .unwrap_or_default(),
 971                )
 972                .map(|path| path.to_string_lossy().to_string())
 973                .unwrap_or_else(|| {
 974                    if multibuffer.is_singleton() {
 975                        multibuffer.title(cx).to_string()
 976                    } else {
 977                        "untitled".to_string()
 978                    }
 979                })
 980        });
 981
 982        let settings = ThemeSettings::get_global(cx);
 983
 984        let mut breadcrumbs = vec![BreadcrumbText {
 985            text,
 986            highlights: None,
 987            font: Some(settings.buffer_font.clone()),
 988        }];
 989
 990        breadcrumbs.extend(symbols.into_iter().map(|symbol| BreadcrumbText {
 991            text: symbol.text,
 992            highlights: Some(symbol.highlight_ranges),
 993            font: Some(settings.buffer_font.clone()),
 994        }));
 995        Some(breadcrumbs)
 996    }
 997
 998    fn added_to_workspace(
 999        &mut self,
1000        workspace: &mut Workspace,
1001        _window: &mut Window,
1002        cx: &mut Context<Self>,
1003    ) {
1004        self.workspace = Some((workspace.weak_handle(), workspace.database_id()));
1005        if let Some(workspace) = &workspace.weak_handle().upgrade() {
1006            cx.subscribe(workspace, |editor, _, event: &workspace::Event, _cx| {
1007                if let workspace::Event::ModalOpened = event {
1008                    editor.mouse_context_menu.take();
1009                    editor.inline_blame_popover.take();
1010                }
1011            })
1012            .detach();
1013        }
1014    }
1015
1016    fn to_item_events(event: &EditorEvent, mut f: impl FnMut(ItemEvent)) {
1017        match event {
1018            EditorEvent::Saved | EditorEvent::TitleChanged => {
1019                f(ItemEvent::UpdateTab);
1020                f(ItemEvent::UpdateBreadcrumbs);
1021            }
1022
1023            EditorEvent::Reparsed(_) => {
1024                f(ItemEvent::UpdateBreadcrumbs);
1025            }
1026
1027            EditorEvent::SelectionsChanged { local } if *local => {
1028                f(ItemEvent::UpdateBreadcrumbs);
1029            }
1030
1031            EditorEvent::BreadcrumbsChanged => {
1032                f(ItemEvent::UpdateBreadcrumbs);
1033            }
1034
1035            EditorEvent::DirtyChanged => {
1036                f(ItemEvent::UpdateTab);
1037            }
1038
1039            EditorEvent::BufferEdited => {
1040                f(ItemEvent::Edit);
1041                f(ItemEvent::UpdateBreadcrumbs);
1042            }
1043
1044            EditorEvent::ExcerptsAdded { .. } | EditorEvent::ExcerptsRemoved { .. } => {
1045                f(ItemEvent::Edit);
1046            }
1047
1048            _ => {}
1049        }
1050    }
1051
1052    fn preserve_preview(&self, cx: &App) -> bool {
1053        self.buffer.read(cx).preserve_preview(cx)
1054    }
1055}
1056
1057impl SerializableItem for Editor {
1058    fn serialized_item_kind() -> &'static str {
1059        "Editor"
1060    }
1061
1062    fn cleanup(
1063        workspace_id: WorkspaceId,
1064        alive_items: Vec<ItemId>,
1065        _window: &mut Window,
1066        cx: &mut App,
1067    ) -> Task<Result<()>> {
1068        workspace::delete_unloaded_items(alive_items, workspace_id, "editors", &DB, cx)
1069    }
1070
1071    fn deserialize(
1072        project: Entity<Project>,
1073        workspace: WeakEntity<Workspace>,
1074        workspace_id: workspace::WorkspaceId,
1075        item_id: ItemId,
1076        window: &mut Window,
1077        cx: &mut App,
1078    ) -> Task<Result<Entity<Self>>> {
1079        let serialized_editor = match DB
1080            .get_serialized_editor(item_id, workspace_id)
1081            .context("Failed to query editor state")
1082        {
1083            Ok(Some(serialized_editor)) => {
1084                if ProjectSettings::get_global(cx)
1085                    .session
1086                    .restore_unsaved_buffers
1087                {
1088                    serialized_editor
1089                } else {
1090                    SerializedEditor {
1091                        abs_path: serialized_editor.abs_path,
1092                        contents: None,
1093                        language: None,
1094                        mtime: None,
1095                    }
1096                }
1097            }
1098            Ok(None) => {
1099                return Task::ready(Err(anyhow!("No path or contents found for buffer")));
1100            }
1101            Err(error) => {
1102                return Task::ready(Err(error));
1103            }
1104        };
1105
1106        match serialized_editor {
1107            SerializedEditor {
1108                abs_path: None,
1109                contents: Some(contents),
1110                language,
1111                ..
1112            } => window.spawn(cx, {
1113                let project = project.clone();
1114                async move |cx| {
1115                    let language_registry =
1116                        project.read_with(cx, |project, _| project.languages().clone())?;
1117
1118                    let language = if let Some(language_name) = language {
1119                        // We don't fail here, because we'd rather not set the language if the name changed
1120                        // than fail to restore the buffer.
1121                        language_registry
1122                            .language_for_name(&language_name)
1123                            .await
1124                            .ok()
1125                    } else {
1126                        None
1127                    };
1128
1129                    // First create the empty buffer
1130                    let buffer = project
1131                        .update(cx, |project, cx| project.create_buffer(true, cx))?
1132                        .await?;
1133
1134                    // Then set the text so that the dirty bit is set correctly
1135                    buffer.update(cx, |buffer, cx| {
1136                        buffer.set_language_registry(language_registry);
1137                        if let Some(language) = language {
1138                            buffer.set_language(Some(language), cx);
1139                        }
1140                        buffer.set_text(contents, cx);
1141                        if let Some(entry) = buffer.peek_undo_stack() {
1142                            buffer.forget_transaction(entry.transaction_id());
1143                        }
1144                    })?;
1145
1146                    cx.update(|window, cx| {
1147                        cx.new(|cx| {
1148                            let mut editor = Editor::for_buffer(buffer, Some(project), window, cx);
1149
1150                            editor.read_metadata_from_db(item_id, workspace_id, window, cx);
1151                            editor
1152                        })
1153                    })
1154                }
1155            }),
1156            SerializedEditor {
1157                abs_path: Some(abs_path),
1158                contents,
1159                mtime,
1160                ..
1161            } => {
1162                let opened_buffer = project.update(cx, |project, cx| {
1163                    let (worktree, path) = project.find_worktree(&abs_path, cx)?;
1164                    let project_path = ProjectPath {
1165                        worktree_id: worktree.read(cx).id(),
1166                        path: path,
1167                    };
1168                    Some(project.open_path(project_path, cx))
1169                });
1170
1171                match opened_buffer {
1172                    Some(opened_buffer) => {
1173                        window.spawn(cx, async move |cx| {
1174                            let (_, buffer) = opened_buffer.await?;
1175
1176                            // This is a bit wasteful: we're loading the whole buffer from
1177                            // disk and then overwrite the content.
1178                            // But for now, it keeps the implementation of the content serialization
1179                            // simple, because we don't have to persist all of the metadata that we get
1180                            // by loading the file (git diff base, ...).
1181                            if let Some(buffer_text) = contents {
1182                                buffer.update(cx, |buffer, cx| {
1183                                    // If we did restore an mtime, we want to store it on the buffer
1184                                    // so that the next edit will mark the buffer as dirty/conflicted.
1185                                    if mtime.is_some() {
1186                                        buffer.did_reload(
1187                                            buffer.version(),
1188                                            buffer.line_ending(),
1189                                            mtime,
1190                                            cx,
1191                                        );
1192                                    }
1193                                    buffer.set_text(buffer_text, cx);
1194                                    if let Some(entry) = buffer.peek_undo_stack() {
1195                                        buffer.forget_transaction(entry.transaction_id());
1196                                    }
1197                                })?;
1198                            }
1199
1200                            cx.update(|window, cx| {
1201                                cx.new(|cx| {
1202                                    let mut editor =
1203                                        Editor::for_buffer(buffer, Some(project), window, cx);
1204
1205                                    editor.read_metadata_from_db(item_id, workspace_id, window, cx);
1206                                    editor
1207                                })
1208                            })
1209                        })
1210                    }
1211                    None => {
1212                        let open_by_abs_path = workspace.update(cx, |workspace, cx| {
1213                            workspace.open_abs_path(
1214                                abs_path.clone(),
1215                                OpenOptions {
1216                                    visible: Some(OpenVisible::None),
1217                                    ..Default::default()
1218                                },
1219                                window,
1220                                cx,
1221                            )
1222                        });
1223                        window.spawn(cx, async move |cx| {
1224                            let editor = open_by_abs_path?.await?.downcast::<Editor>().with_context(|| format!("Failed to downcast to Editor after opening abs path {abs_path:?}"))?;
1225                            editor.update_in(cx, |editor, window, cx| {
1226                                editor.read_metadata_from_db(item_id, workspace_id, window, cx);
1227                            })?;
1228                            Ok(editor)
1229                        })
1230                    }
1231                }
1232            }
1233            SerializedEditor {
1234                abs_path: None,
1235                contents: None,
1236                ..
1237            } => window.spawn(cx, async move |cx| {
1238                let buffer = project
1239                    .update(cx, |project, cx| project.create_buffer(true, cx))?
1240                    .await?;
1241
1242                cx.update(|window, cx| {
1243                    cx.new(|cx| {
1244                        let mut editor = Editor::for_buffer(buffer, Some(project), window, cx);
1245
1246                        editor.read_metadata_from_db(item_id, workspace_id, window, cx);
1247                        editor
1248                    })
1249                })
1250            }),
1251        }
1252    }
1253
1254    fn serialize(
1255        &mut self,
1256        workspace: &mut Workspace,
1257        item_id: ItemId,
1258        closing: bool,
1259        window: &mut Window,
1260        cx: &mut Context<Self>,
1261    ) -> Option<Task<Result<()>>> {
1262        if self.mode.is_minimap() {
1263            return None;
1264        }
1265        let mut serialize_dirty_buffers = self.serialize_dirty_buffers;
1266
1267        let project = self.project.clone()?;
1268        if project.read(cx).visible_worktrees(cx).next().is_none() {
1269            // If we don't have a worktree, we don't serialize, because
1270            // projects without worktrees aren't deserialized.
1271            serialize_dirty_buffers = false;
1272        }
1273
1274        if closing && !serialize_dirty_buffers {
1275            return None;
1276        }
1277
1278        let workspace_id = workspace.database_id()?;
1279
1280        let buffer = self.buffer().read(cx).as_singleton()?;
1281
1282        let abs_path = buffer.read(cx).file().and_then(|file| {
1283            let worktree_id = file.worktree_id(cx);
1284            project
1285                .read(cx)
1286                .worktree_for_id(worktree_id, cx)
1287                .map(|worktree| worktree.read(cx).absolutize(file.path()))
1288                .or_else(|| {
1289                    let full_path = file.full_path(cx);
1290                    let project_path = project.read(cx).find_project_path(&full_path, cx)?;
1291                    project.read(cx).absolute_path(&project_path, cx)
1292                })
1293        });
1294
1295        let is_dirty = buffer.read(cx).is_dirty();
1296        let mtime = buffer.read(cx).saved_mtime();
1297
1298        let snapshot = buffer.read(cx).snapshot();
1299
1300        Some(cx.spawn_in(window, async move |_this, cx| {
1301            cx.background_spawn(async move {
1302                let (contents, language) = if serialize_dirty_buffers && is_dirty {
1303                    let contents = snapshot.text();
1304                    let language = snapshot.language().map(|lang| lang.name().to_string());
1305                    (Some(contents), language)
1306                } else {
1307                    (None, None)
1308                };
1309
1310                let editor = SerializedEditor {
1311                    abs_path,
1312                    contents,
1313                    language,
1314                    mtime,
1315                };
1316                log::debug!("Serializing editor {item_id:?} in workspace {workspace_id:?}");
1317                DB.save_serialized_editor(item_id, workspace_id, editor)
1318                    .await
1319                    .context("failed to save serialized editor")
1320            })
1321            .await
1322            .context("failed to save contents of buffer")?;
1323
1324            Ok(())
1325        }))
1326    }
1327
1328    fn should_serialize(&self, event: &Self::Event) -> bool {
1329        matches!(
1330            event,
1331            EditorEvent::Saved | EditorEvent::DirtyChanged | EditorEvent::BufferEdited
1332        )
1333    }
1334}
1335
1336#[derive(Debug, Default)]
1337struct EditorRestorationData {
1338    entries: HashMap<PathBuf, RestorationData>,
1339}
1340
1341#[derive(Default, Debug)]
1342pub struct RestorationData {
1343    pub scroll_position: (BufferRow, gpui::Point<f32>),
1344    pub folds: Vec<Range<Point>>,
1345    pub selections: Vec<Range<Point>>,
1346}
1347
1348impl ProjectItem for Editor {
1349    type Item = Buffer;
1350
1351    fn project_item_kind() -> Option<ProjectItemKind> {
1352        Some(ProjectItemKind("Editor"))
1353    }
1354
1355    fn for_project_item(
1356        project: Entity<Project>,
1357        pane: Option<&Pane>,
1358        buffer: Entity<Buffer>,
1359        window: &mut Window,
1360        cx: &mut Context<Self>,
1361    ) -> Self {
1362        let mut editor = Self::for_buffer(buffer.clone(), Some(project), window, cx);
1363        if let Some((excerpt_id, buffer_id, snapshot)) =
1364            editor.buffer().read(cx).snapshot(cx).as_singleton()
1365            && WorkspaceSettings::get(None, cx).restore_on_file_reopen
1366            && let Some(restoration_data) = Self::project_item_kind()
1367                .and_then(|kind| pane.as_ref()?.project_item_restoration_data.get(&kind))
1368                .and_then(|data| data.downcast_ref::<EditorRestorationData>())
1369                .and_then(|data| {
1370                    let file = project::File::from_dyn(buffer.read(cx).file())?;
1371                    data.entries.get(&file.abs_path(cx))
1372                })
1373        {
1374            editor.fold_ranges(
1375                clip_ranges(&restoration_data.folds, snapshot),
1376                false,
1377                window,
1378                cx,
1379            );
1380            if !restoration_data.selections.is_empty() {
1381                editor.change_selections(SelectionEffects::no_scroll(), window, cx, |s| {
1382                    s.select_ranges(clip_ranges(&restoration_data.selections, snapshot));
1383                });
1384            }
1385            let (top_row, offset) = restoration_data.scroll_position;
1386            let anchor = Anchor::in_buffer(
1387                *excerpt_id,
1388                buffer_id,
1389                snapshot.anchor_before(Point::new(top_row, 0)),
1390            );
1391            editor.set_scroll_anchor(ScrollAnchor { anchor, offset }, window, cx);
1392        }
1393
1394        editor
1395    }
1396
1397    fn for_broken_project_item(
1398        abs_path: &Path,
1399        is_local: bool,
1400        e: &anyhow::Error,
1401        window: &mut Window,
1402        cx: &mut App,
1403    ) -> Option<InvalidBufferView> {
1404        Some(InvalidBufferView::new(abs_path, is_local, e, window, cx))
1405    }
1406}
1407
1408fn clip_ranges<'a>(
1409    original: impl IntoIterator<Item = &'a Range<Point>> + 'a,
1410    snapshot: &'a BufferSnapshot,
1411) -> Vec<Range<Point>> {
1412    original
1413        .into_iter()
1414        .map(|range| {
1415            snapshot.clip_point(range.start, Bias::Left)
1416                ..snapshot.clip_point(range.end, Bias::Right)
1417        })
1418        .collect()
1419}
1420
1421impl EventEmitter<SearchEvent> for Editor {}
1422
1423impl Editor {
1424    pub fn update_restoration_data(
1425        &self,
1426        cx: &mut Context<Self>,
1427        write: impl for<'a> FnOnce(&'a mut RestorationData) + 'static,
1428    ) {
1429        if self.mode.is_minimap() || !WorkspaceSettings::get(None, cx).restore_on_file_reopen {
1430            return;
1431        }
1432
1433        let editor = cx.entity();
1434        cx.defer(move |cx| {
1435            editor.update(cx, |editor, cx| {
1436                let kind = Editor::project_item_kind()?;
1437                let pane = editor.workspace()?.read(cx).pane_for(&cx.entity())?;
1438                let buffer = editor.buffer().read(cx).as_singleton()?;
1439                let file_abs_path = project::File::from_dyn(buffer.read(cx).file())?.abs_path(cx);
1440                pane.update(cx, |pane, _| {
1441                    let data = pane
1442                        .project_item_restoration_data
1443                        .entry(kind)
1444                        .or_insert_with(|| Box::new(EditorRestorationData::default()) as Box<_>);
1445                    let data = match data.downcast_mut::<EditorRestorationData>() {
1446                        Some(data) => data,
1447                        None => {
1448                            *data = Box::new(EditorRestorationData::default());
1449                            data.downcast_mut::<EditorRestorationData>()
1450                                .expect("just written the type downcasted to")
1451                        }
1452                    };
1453
1454                    let data = data.entries.entry(file_abs_path).or_default();
1455                    write(data);
1456                    Some(())
1457                })
1458            });
1459        });
1460    }
1461}
1462
1463pub(crate) enum BufferSearchHighlights {}
1464impl SearchableItem for Editor {
1465    type Match = Range<Anchor>;
1466
1467    fn get_matches(&self, _window: &mut Window, _: &mut App) -> Vec<Range<Anchor>> {
1468        self.background_highlights
1469            .get(&HighlightKey::Type(TypeId::of::<BufferSearchHighlights>()))
1470            .map_or(Vec::new(), |(_color, ranges)| {
1471                ranges.iter().cloned().collect()
1472            })
1473    }
1474
1475    fn clear_matches(&mut self, _: &mut Window, cx: &mut Context<Self>) {
1476        if self
1477            .clear_background_highlights::<BufferSearchHighlights>(cx)
1478            .is_some()
1479        {
1480            cx.emit(SearchEvent::MatchesInvalidated);
1481        }
1482    }
1483
1484    fn update_matches(
1485        &mut self,
1486        matches: &[Range<Anchor>],
1487        _: &mut Window,
1488        cx: &mut Context<Self>,
1489    ) {
1490        let existing_range = self
1491            .background_highlights
1492            .get(&HighlightKey::Type(TypeId::of::<BufferSearchHighlights>()))
1493            .map(|(_, range)| range.as_ref());
1494        let updated = existing_range != Some(matches);
1495        self.highlight_background::<BufferSearchHighlights>(
1496            matches,
1497            |theme| theme.colors().search_match_background,
1498            cx,
1499        );
1500        if updated {
1501            cx.emit(SearchEvent::MatchesInvalidated);
1502        }
1503    }
1504
1505    fn has_filtered_search_ranges(&mut self) -> bool {
1506        self.has_background_highlights::<SearchWithinRange>()
1507    }
1508
1509    fn toggle_filtered_search_ranges(
1510        &mut self,
1511        enabled: Option<FilteredSearchRange>,
1512        _: &mut Window,
1513        cx: &mut Context<Self>,
1514    ) {
1515        if self.has_filtered_search_ranges() {
1516            self.previous_search_ranges = self
1517                .clear_background_highlights::<SearchWithinRange>(cx)
1518                .map(|(_, ranges)| ranges)
1519        }
1520
1521        if let Some(range) = enabled {
1522            let ranges = self.selections.disjoint_anchor_ranges().collect::<Vec<_>>();
1523
1524            if ranges.iter().any(|s| s.start != s.end) {
1525                self.set_search_within_ranges(&ranges, cx);
1526            } else if let Some(previous_search_ranges) = self.previous_search_ranges.take()
1527                && range != FilteredSearchRange::Selection
1528            {
1529                self.set_search_within_ranges(&previous_search_ranges, cx);
1530            }
1531        }
1532    }
1533
1534    fn supported_options(&self) -> SearchOptions {
1535        if self.in_project_search {
1536            SearchOptions {
1537                case: true,
1538                word: true,
1539                regex: true,
1540                replacement: false,
1541                selection: false,
1542                find_in_results: true,
1543            }
1544        } else {
1545            SearchOptions {
1546                case: true,
1547                word: true,
1548                regex: true,
1549                replacement: true,
1550                selection: true,
1551                find_in_results: false,
1552            }
1553        }
1554    }
1555
1556    fn query_suggestion(&mut self, window: &mut Window, cx: &mut Context<Self>) -> String {
1557        let setting = EditorSettings::get_global(cx).seed_search_query_from_cursor;
1558        let snapshot = &self.snapshot(window, cx).buffer_snapshot;
1559        let selection = self.selections.newest_adjusted(cx);
1560
1561        match setting {
1562            SeedQuerySetting::Never => String::new(),
1563            SeedQuerySetting::Selection | SeedQuerySetting::Always if !selection.is_empty() => {
1564                let text: String = snapshot
1565                    .text_for_range(selection.start..selection.end)
1566                    .collect();
1567                if text.contains('\n') {
1568                    String::new()
1569                } else {
1570                    text
1571                }
1572            }
1573            SeedQuerySetting::Selection => String::new(),
1574            SeedQuerySetting::Always => {
1575                let (range, kind) =
1576                    snapshot.surrounding_word(selection.start, Some(CharScopeContext::Completion));
1577                if kind == Some(CharKind::Word) {
1578                    let text: String = snapshot.text_for_range(range).collect();
1579                    if !text.trim().is_empty() {
1580                        return text;
1581                    }
1582                }
1583                String::new()
1584            }
1585        }
1586    }
1587
1588    fn activate_match(
1589        &mut self,
1590        index: usize,
1591        matches: &[Range<Anchor>],
1592        window: &mut Window,
1593        cx: &mut Context<Self>,
1594    ) {
1595        self.unfold_ranges(&[matches[index].clone()], false, true, cx);
1596        let range = self.range_for_match(&matches[index]);
1597        self.change_selections(Default::default(), window, cx, |s| {
1598            s.select_ranges([range]);
1599        })
1600    }
1601
1602    fn select_matches(
1603        &mut self,
1604        matches: &[Self::Match],
1605        window: &mut Window,
1606        cx: &mut Context<Self>,
1607    ) {
1608        self.unfold_ranges(matches, false, false, cx);
1609        self.change_selections(SelectionEffects::no_scroll(), window, cx, |s| {
1610            s.select_ranges(matches.iter().cloned())
1611        });
1612    }
1613    fn replace(
1614        &mut self,
1615        identifier: &Self::Match,
1616        query: &SearchQuery,
1617        window: &mut Window,
1618        cx: &mut Context<Self>,
1619    ) {
1620        let text = self.buffer.read(cx);
1621        let text = text.snapshot(cx);
1622        let text = text.text_for_range(identifier.clone()).collect::<Vec<_>>();
1623        let text: Cow<_> = if text.len() == 1 {
1624            text.first().cloned().unwrap().into()
1625        } else {
1626            let joined_chunks = text.join("");
1627            joined_chunks.into()
1628        };
1629
1630        if let Some(replacement) = query.replacement_for(&text) {
1631            self.transact(window, cx, |this, _, cx| {
1632                this.edit([(identifier.clone(), Arc::from(&*replacement))], cx);
1633            });
1634        }
1635    }
1636    fn replace_all(
1637        &mut self,
1638        matches: &mut dyn Iterator<Item = &Self::Match>,
1639        query: &SearchQuery,
1640        window: &mut Window,
1641        cx: &mut Context<Self>,
1642    ) {
1643        let text = self.buffer.read(cx);
1644        let text = text.snapshot(cx);
1645        let mut edits = vec![];
1646
1647        for m in matches {
1648            let text = text.text_for_range(m.clone()).collect::<Vec<_>>();
1649
1650            let text: Cow<_> = if text.len() == 1 {
1651                text.first().cloned().unwrap().into()
1652            } else {
1653                let joined_chunks = text.join("");
1654                joined_chunks.into()
1655            };
1656
1657            if let Some(replacement) = query.replacement_for(&text) {
1658                edits.push((m.clone(), Arc::from(&*replacement)));
1659            }
1660        }
1661
1662        if !edits.is_empty() {
1663            self.transact(window, cx, |this, _, cx| {
1664                this.edit(edits, cx);
1665            });
1666        }
1667    }
1668    fn match_index_for_direction(
1669        &mut self,
1670        matches: &[Range<Anchor>],
1671        current_index: usize,
1672        direction: Direction,
1673        count: usize,
1674        _: &mut Window,
1675        cx: &mut Context<Self>,
1676    ) -> usize {
1677        let buffer = self.buffer().read(cx).snapshot(cx);
1678        let current_index_position = if self.selections.disjoint_anchors_arc().len() == 1 {
1679            self.selections.newest_anchor().head()
1680        } else {
1681            matches[current_index].start
1682        };
1683
1684        let mut count = count % matches.len();
1685        if count == 0 {
1686            return current_index;
1687        }
1688        match direction {
1689            Direction::Next => {
1690                if matches[current_index]
1691                    .start
1692                    .cmp(&current_index_position, &buffer)
1693                    .is_gt()
1694                {
1695                    count -= 1
1696                }
1697
1698                (current_index + count) % matches.len()
1699            }
1700            Direction::Prev => {
1701                if matches[current_index]
1702                    .end
1703                    .cmp(&current_index_position, &buffer)
1704                    .is_lt()
1705                {
1706                    count -= 1;
1707                }
1708
1709                if current_index >= count {
1710                    current_index - count
1711                } else {
1712                    matches.len() - (count - current_index)
1713                }
1714            }
1715        }
1716    }
1717
1718    fn find_matches(
1719        &mut self,
1720        query: Arc<project::search::SearchQuery>,
1721        _: &mut Window,
1722        cx: &mut Context<Self>,
1723    ) -> Task<Vec<Range<Anchor>>> {
1724        let buffer = self.buffer().read(cx).snapshot(cx);
1725        let search_within_ranges = self
1726            .background_highlights
1727            .get(&HighlightKey::Type(TypeId::of::<SearchWithinRange>()))
1728            .map_or(vec![], |(_color, ranges)| {
1729                ranges.iter().cloned().collect::<Vec<_>>()
1730            });
1731
1732        cx.background_spawn(async move {
1733            let mut ranges = Vec::new();
1734
1735            let search_within_ranges = if search_within_ranges.is_empty() {
1736                vec![buffer.anchor_before(0)..buffer.anchor_after(buffer.len())]
1737            } else {
1738                search_within_ranges
1739            };
1740
1741            for range in search_within_ranges {
1742                for (search_buffer, search_range, excerpt_id, deleted_hunk_anchor) in
1743                    buffer.range_to_buffer_ranges_with_deleted_hunks(range)
1744                {
1745                    ranges.extend(
1746                        query
1747                            .search(search_buffer, Some(search_range.clone()))
1748                            .await
1749                            .into_iter()
1750                            .map(|match_range| {
1751                                if let Some(deleted_hunk_anchor) = deleted_hunk_anchor {
1752                                    let start = search_buffer
1753                                        .anchor_after(search_range.start + match_range.start);
1754                                    let end = search_buffer
1755                                        .anchor_before(search_range.start + match_range.end);
1756                                    Anchor {
1757                                        diff_base_anchor: Some(start),
1758                                        ..deleted_hunk_anchor
1759                                    }..Anchor {
1760                                        diff_base_anchor: Some(end),
1761                                        ..deleted_hunk_anchor
1762                                    }
1763                                } else {
1764                                    let start = search_buffer
1765                                        .anchor_after(search_range.start + match_range.start);
1766                                    let end = search_buffer
1767                                        .anchor_before(search_range.start + match_range.end);
1768                                    Anchor::range_in_buffer(
1769                                        excerpt_id,
1770                                        search_buffer.remote_id(),
1771                                        start..end,
1772                                    )
1773                                }
1774                            }),
1775                    );
1776                }
1777            }
1778
1779            ranges
1780        })
1781    }
1782
1783    fn active_match_index(
1784        &mut self,
1785        direction: Direction,
1786        matches: &[Range<Anchor>],
1787        _: &mut Window,
1788        cx: &mut Context<Self>,
1789    ) -> Option<usize> {
1790        active_match_index(
1791            direction,
1792            matches,
1793            &self.selections.newest_anchor().head(),
1794            &self.buffer().read(cx).snapshot(cx),
1795        )
1796    }
1797
1798    fn search_bar_visibility_changed(&mut self, _: bool, _: &mut Window, _: &mut Context<Self>) {
1799        self.expect_bounds_change = self.last_bounds;
1800    }
1801}
1802
1803pub fn active_match_index(
1804    direction: Direction,
1805    ranges: &[Range<Anchor>],
1806    cursor: &Anchor,
1807    buffer: &MultiBufferSnapshot,
1808) -> Option<usize> {
1809    if ranges.is_empty() {
1810        None
1811    } else {
1812        let r = ranges.binary_search_by(|probe| {
1813            if probe.end.cmp(cursor, buffer).is_lt() {
1814                Ordering::Less
1815            } else if probe.start.cmp(cursor, buffer).is_gt() {
1816                Ordering::Greater
1817            } else {
1818                Ordering::Equal
1819            }
1820        });
1821        match direction {
1822            Direction::Prev => match r {
1823                Ok(i) => Some(i),
1824                Err(i) => Some(i.saturating_sub(1)),
1825            },
1826            Direction::Next => match r {
1827                Ok(i) | Err(i) => Some(cmp::min(i, ranges.len() - 1)),
1828            },
1829        }
1830    }
1831}
1832
1833pub fn entry_label_color(selected: bool) -> Color {
1834    if selected {
1835        Color::Default
1836    } else {
1837        Color::Muted
1838    }
1839}
1840
1841pub fn entry_diagnostic_aware_icon_name_and_color(
1842    diagnostic_severity: Option<DiagnosticSeverity>,
1843) -> Option<(IconName, Color)> {
1844    match diagnostic_severity {
1845        Some(DiagnosticSeverity::ERROR) => Some((IconName::Close, Color::Error)),
1846        Some(DiagnosticSeverity::WARNING) => Some((IconName::Triangle, Color::Warning)),
1847        _ => None,
1848    }
1849}
1850
1851pub fn entry_diagnostic_aware_icon_decoration_and_color(
1852    diagnostic_severity: Option<DiagnosticSeverity>,
1853) -> Option<(IconDecorationKind, Color)> {
1854    match diagnostic_severity {
1855        Some(DiagnosticSeverity::ERROR) => Some((IconDecorationKind::X, Color::Error)),
1856        Some(DiagnosticSeverity::WARNING) => Some((IconDecorationKind::Triangle, Color::Warning)),
1857        _ => None,
1858    }
1859}
1860
1861pub fn entry_git_aware_label_color(git_status: GitSummary, ignored: bool, selected: bool) -> Color {
1862    let tracked = git_status.index + git_status.worktree;
1863    if ignored {
1864        Color::Ignored
1865    } else if git_status.conflict > 0 {
1866        Color::Conflict
1867    } else if tracked.modified > 0 {
1868        Color::Modified
1869    } else if tracked.added > 0 || git_status.untracked > 0 {
1870        Color::Created
1871    } else {
1872        entry_label_color(selected)
1873    }
1874}
1875
1876fn path_for_buffer<'a>(
1877    buffer: &Entity<MultiBuffer>,
1878    height: usize,
1879    include_filename: bool,
1880    cx: &'a App,
1881) -> Option<Cow<'a, str>> {
1882    let file = buffer.read(cx).as_singleton()?.read(cx).file()?;
1883    path_for_file(file.as_ref(), height, include_filename, cx)
1884}
1885
1886fn path_for_file<'a>(
1887    file: &'a dyn language::File,
1888    mut height: usize,
1889    include_filename: bool,
1890    cx: &'a App,
1891) -> Option<Cow<'a, str>> {
1892    // Ensure we always render at least the filename.
1893    height += 1;
1894
1895    let mut prefix = file.path().as_ref();
1896    while height > 0 {
1897        if let Some(parent) = prefix.parent() {
1898            prefix = parent;
1899            height -= 1;
1900        } else {
1901            break;
1902        }
1903    }
1904
1905    // The full_path method allocates, so avoid calling it if height is zero.
1906    if height > 0 {
1907        let mut full_path = file.full_path(cx);
1908        if !include_filename {
1909            if !full_path.pop() {
1910                return None;
1911            }
1912        }
1913        Some(full_path.to_string_lossy().to_string().into())
1914    } else {
1915        let mut path = file.path().strip_prefix(prefix).ok()?;
1916        if !include_filename {
1917            path = path.parent()?;
1918        }
1919        Some(path.display(file.path_style(cx)))
1920    }
1921}
1922
1923#[cfg(test)]
1924mod tests {
1925    use crate::editor_tests::init_test;
1926    use fs::Fs;
1927
1928    use super::*;
1929    use fs::MTime;
1930    use gpui::{App, VisualTestContext};
1931    use language::{LanguageMatcher, TestFile};
1932    use project::FakeFs;
1933    use std::path::{Path, PathBuf};
1934    use util::{path, rel_path::RelPath};
1935
1936    #[gpui::test]
1937    fn test_path_for_file(cx: &mut App) {
1938        let file = TestFile {
1939            path: RelPath::empty().into(),
1940            root_name: String::new(),
1941            local_root: None,
1942        };
1943        assert_eq!(path_for_file(&file, 0, false, cx), None);
1944    }
1945
1946    async fn deserialize_editor(
1947        item_id: ItemId,
1948        workspace_id: WorkspaceId,
1949        workspace: Entity<Workspace>,
1950        project: Entity<Project>,
1951        cx: &mut VisualTestContext,
1952    ) -> Entity<Editor> {
1953        workspace
1954            .update_in(cx, |workspace, window, cx| {
1955                let pane = workspace.active_pane();
1956                pane.update(cx, |_, cx| {
1957                    Editor::deserialize(
1958                        project.clone(),
1959                        workspace.weak_handle(),
1960                        workspace_id,
1961                        item_id,
1962                        window,
1963                        cx,
1964                    )
1965                })
1966            })
1967            .await
1968            .unwrap()
1969    }
1970
1971    fn rust_language() -> Arc<language::Language> {
1972        Arc::new(language::Language::new(
1973            language::LanguageConfig {
1974                name: "Rust".into(),
1975                matcher: LanguageMatcher {
1976                    path_suffixes: vec!["rs".to_string()],
1977                    ..Default::default()
1978                },
1979                ..Default::default()
1980            },
1981            Some(tree_sitter_rust::LANGUAGE.into()),
1982        ))
1983    }
1984
1985    #[gpui::test]
1986    async fn test_deserialize(cx: &mut gpui::TestAppContext) {
1987        init_test(cx, |_| {});
1988
1989        let fs = FakeFs::new(cx.executor());
1990        fs.insert_file(path!("/file.rs"), Default::default()).await;
1991
1992        // Test case 1: Deserialize with path and contents
1993        {
1994            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
1995            let (workspace, cx) =
1996                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1997            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
1998            let item_id = 1234 as ItemId;
1999            let mtime = fs
2000                .metadata(Path::new(path!("/file.rs")))
2001                .await
2002                .unwrap()
2003                .unwrap()
2004                .mtime;
2005
2006            let serialized_editor = SerializedEditor {
2007                abs_path: Some(PathBuf::from(path!("/file.rs"))),
2008                contents: Some("fn main() {}".to_string()),
2009                language: Some("Rust".to_string()),
2010                mtime: Some(mtime),
2011            };
2012
2013            DB.save_serialized_editor(item_id, workspace_id, serialized_editor.clone())
2014                .await
2015                .unwrap();
2016
2017            let deserialized =
2018                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2019
2020            deserialized.update(cx, |editor, cx| {
2021                assert_eq!(editor.text(cx), "fn main() {}");
2022                assert!(editor.is_dirty(cx));
2023                assert!(!editor.has_conflict(cx));
2024                let buffer = editor.buffer().read(cx).as_singleton().unwrap().read(cx);
2025                assert!(buffer.file().is_some());
2026            });
2027        }
2028
2029        // Test case 2: Deserialize with only path
2030        {
2031            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
2032            let (workspace, cx) =
2033                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2034
2035            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2036
2037            let item_id = 5678 as ItemId;
2038            let serialized_editor = SerializedEditor {
2039                abs_path: Some(PathBuf::from(path!("/file.rs"))),
2040                contents: None,
2041                language: None,
2042                mtime: None,
2043            };
2044
2045            DB.save_serialized_editor(item_id, workspace_id, serialized_editor)
2046                .await
2047                .unwrap();
2048
2049            let deserialized =
2050                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2051
2052            deserialized.update(cx, |editor, cx| {
2053                assert_eq!(editor.text(cx), ""); // The file should be empty as per our initial setup
2054                assert!(!editor.is_dirty(cx));
2055                assert!(!editor.has_conflict(cx));
2056
2057                let buffer = editor.buffer().read(cx).as_singleton().unwrap().read(cx);
2058                assert!(buffer.file().is_some());
2059            });
2060        }
2061
2062        // Test case 3: Deserialize with no path (untitled buffer, with content and language)
2063        {
2064            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
2065            // Add Rust to the language, so that we can restore the language of the buffer
2066            project.read_with(cx, |project, _| project.languages().add(rust_language()));
2067
2068            let (workspace, cx) =
2069                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2070
2071            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2072
2073            let item_id = 9012 as ItemId;
2074            let serialized_editor = SerializedEditor {
2075                abs_path: None,
2076                contents: Some("hello".to_string()),
2077                language: Some("Rust".to_string()),
2078                mtime: None,
2079            };
2080
2081            DB.save_serialized_editor(item_id, workspace_id, serialized_editor)
2082                .await
2083                .unwrap();
2084
2085            let deserialized =
2086                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2087
2088            deserialized.update(cx, |editor, cx| {
2089                assert_eq!(editor.text(cx), "hello");
2090                assert!(editor.is_dirty(cx)); // The editor should be dirty for an untitled buffer
2091
2092                let buffer = editor.buffer().read(cx).as_singleton().unwrap().read(cx);
2093                assert_eq!(
2094                    buffer.language().map(|lang| lang.name()),
2095                    Some("Rust".into())
2096                ); // Language should be set to Rust
2097                assert!(buffer.file().is_none()); // The buffer should not have an associated file
2098            });
2099        }
2100
2101        // Test case 4: Deserialize with path, content, and old mtime
2102        {
2103            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
2104            let (workspace, cx) =
2105                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2106
2107            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2108
2109            let item_id = 9345 as ItemId;
2110            let old_mtime = MTime::from_seconds_and_nanos(0, 50);
2111            let serialized_editor = SerializedEditor {
2112                abs_path: Some(PathBuf::from(path!("/file.rs"))),
2113                contents: Some("fn main() {}".to_string()),
2114                language: Some("Rust".to_string()),
2115                mtime: Some(old_mtime),
2116            };
2117
2118            DB.save_serialized_editor(item_id, workspace_id, serialized_editor)
2119                .await
2120                .unwrap();
2121
2122            let deserialized =
2123                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2124
2125            deserialized.update(cx, |editor, cx| {
2126                assert_eq!(editor.text(cx), "fn main() {}");
2127                assert!(editor.has_conflict(cx)); // The editor should have a conflict
2128            });
2129        }
2130
2131        // Test case 5: Deserialize with no path, no content, no language, and no old mtime (new, empty, unsaved buffer)
2132        {
2133            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
2134            let (workspace, cx) =
2135                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2136
2137            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2138
2139            let item_id = 10000 as ItemId;
2140            let serialized_editor = SerializedEditor {
2141                abs_path: None,
2142                contents: None,
2143                language: None,
2144                mtime: None,
2145            };
2146
2147            DB.save_serialized_editor(item_id, workspace_id, serialized_editor)
2148                .await
2149                .unwrap();
2150
2151            let deserialized =
2152                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2153
2154            deserialized.update(cx, |editor, cx| {
2155                assert_eq!(editor.text(cx), "");
2156                assert!(!editor.is_dirty(cx));
2157                assert!(!editor.has_conflict(cx));
2158
2159                let buffer = editor.buffer().read(cx).as_singleton().unwrap().read(cx);
2160                assert!(buffer.file().is_none());
2161            });
2162        }
2163    }
2164}