1use crate::{
   2    Anchor, Autoscroll, BufferSerialization, Capability, Editor, EditorEvent, EditorSettings,
   3    ExcerptId, ExcerptRange, FormatTarget, MultiBuffer, MultiBufferSnapshot, NavigationData,
   4    ReportEditorEvent, SearchWithinRange, SelectionEffects, ToPoint as _,
   5    display_map::HighlightKey,
   6    editor_settings::SeedQuerySetting,
   7    persistence::{DB, SerializedEditor},
   8    scroll::{ScrollAnchor, ScrollOffset},
   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, LocalFile, Point, SelectionGoal,
  21    proto::serialize_anchor as serialize_text_anchor,
  22};
  23use lsp::DiagnosticSeverity;
  24use multi_buffer::MultiBufferOffset;
  25use project::{
  26    File, Project, ProjectItem as _, ProjectPath, lsp_store::FormatTrigger,
  27    project_settings::ProjectSettings, search::SearchQuery,
  28};
  29use rpc::proto::{self, update_view};
  30use settings::Settings;
  31use std::{
  32    any::TypeId,
  33    borrow::Cow,
  34    cmp::{self, Ordering},
  35    iter,
  36    ops::Range,
  37    path::{Path, PathBuf},
  38    sync::Arc,
  39};
  40use text::{BufferId, BufferSnapshot, Selection};
  41use theme::Theme;
  42use ui::{IconDecorationKind, prelude::*};
  43use util::{ResultExt, TryFutureExt, paths::PathExt};
  44use workspace::{
  45    CollaboratorId, ItemId, ItemNavHistory, ToolbarItemLocation, ViewId, Workspace, WorkspaceId,
  46    invalid_item_view::InvalidItemView,
  47    item::{FollowableItem, Item, ItemBufferKind, ItemEvent, ProjectItem, SaveOptions},
  48    searchable::{
  49        Direction, FilteredSearchRange, SearchEvent, SearchableItem, SearchableItemHandle,
  50    },
  51};
  52use workspace::{
  53    OpenOptions,
  54    item::{Dedup, ItemSettings, SerializableItem, TabContentParams},
  55};
  56use workspace::{
  57    OpenVisible, Pane, WorkspaceSettings,
  58    item::{BreadcrumbText, FollowEvent, ProjectItemKind},
  59    searchable::SearchOptions,
  60};
  61
  62pub const MAX_TAB_TITLE_LEN: usize = 24;
  63
  64impl FollowableItem for Editor {
  65    fn remote_id(&self) -> Option<ViewId> {
  66        self.remote_id
  67    }
  68
  69    fn from_state_proto(
  70        workspace: Entity<Workspace>,
  71        remote_id: ViewId,
  72        state: &mut Option<proto::view::Variant>,
  73        window: &mut Window,
  74        cx: &mut App,
  75    ) -> Option<Task<Result<Entity<Self>>>> {
  76        let project = workspace.read(cx).project().to_owned();
  77        let Some(proto::view::Variant::Editor(_)) = state else {
  78            return None;
  79        };
  80        let Some(proto::view::Variant::Editor(state)) = state.take() else {
  81            unreachable!()
  82        };
  83
  84        let buffer_ids = state
  85            .excerpts
  86            .iter()
  87            .map(|excerpt| excerpt.buffer_id)
  88            .collect::<HashSet<_>>();
  89        let buffers = project.update(cx, |project, cx| {
  90            buffer_ids
  91                .iter()
  92                .map(|id| BufferId::new(*id).map(|id| project.open_buffer_by_id(id, cx)))
  93                .collect::<Result<Vec<_>>>()
  94        });
  95
  96        Some(window.spawn(cx, async move |cx| {
  97            let mut buffers = futures::future::try_join_all(buffers?)
  98                .await
  99                .debug_assert_ok("leaders don't share views for unshared buffers")?;
 100
 101            let editor = cx.update(|window, cx| {
 102                let multibuffer = cx.new(|cx| {
 103                    let mut multibuffer;
 104                    if state.singleton && buffers.len() == 1 {
 105                        multibuffer = MultiBuffer::singleton(buffers.pop().unwrap(), cx)
 106                    } else {
 107                        multibuffer = MultiBuffer::new(project.read(cx).capability());
 108                        let mut sorted_excerpts = state.excerpts.clone();
 109                        sorted_excerpts.sort_by_key(|e| e.id);
 110                        let sorted_excerpts = sorted_excerpts.into_iter().peekable();
 111
 112                        for excerpt in sorted_excerpts {
 113                            let Ok(buffer_id) = BufferId::new(excerpt.buffer_id) else {
 114                                continue;
 115                            };
 116
 117                            let mut insert_position = ExcerptId::min();
 118                            for e in &state.excerpts {
 119                                if e.id == excerpt.id {
 120                                    break;
 121                                }
 122                                if e.id < excerpt.id {
 123                                    insert_position = ExcerptId::from_proto(e.id);
 124                                }
 125                            }
 126
 127                            let buffer =
 128                                buffers.iter().find(|b| b.read(cx).remote_id() == buffer_id);
 129
 130                            let Some(excerpt) = deserialize_excerpt_range(excerpt) else {
 131                                continue;
 132                            };
 133
 134                            let Some(buffer) = buffer else { continue };
 135
 136                            multibuffer.insert_excerpts_with_ids_after(
 137                                insert_position,
 138                                buffer.clone(),
 139                                [excerpt],
 140                                cx,
 141                            );
 142                        }
 143                    };
 144
 145                    if let Some(title) = &state.title {
 146                        multibuffer = multibuffer.with_title(title.clone())
 147                    }
 148
 149                    multibuffer
 150                });
 151
 152                cx.new(|cx| {
 153                    let mut editor =
 154                        Editor::for_multibuffer(multibuffer, Some(project.clone()), window, cx);
 155                    editor.remote_id = Some(remote_id);
 156                    editor
 157                })
 158            })?;
 159
 160            update_editor_from_message(
 161                editor.downgrade(),
 162                project,
 163                proto::update_view::Editor {
 164                    selections: state.selections,
 165                    pending_selection: state.pending_selection,
 166                    scroll_top_anchor: state.scroll_top_anchor,
 167                    scroll_x: state.scroll_x,
 168                    scroll_y: state.scroll_y,
 169                    ..Default::default()
 170                },
 171                cx,
 172            )
 173            .await?;
 174
 175            Ok(editor)
 176        }))
 177    }
 178
 179    fn set_leader_id(
 180        &mut self,
 181        leader_id: Option<CollaboratorId>,
 182        window: &mut Window,
 183        cx: &mut Context<Self>,
 184    ) {
 185        self.leader_id = leader_id;
 186        if self.leader_id.is_some() {
 187            self.buffer.update(cx, |buffer, cx| {
 188                buffer.remove_active_selections(cx);
 189            });
 190        } else if self.focus_handle.is_focused(window) {
 191            self.buffer.update(cx, |buffer, cx| {
 192                buffer.set_active_selections(
 193                    &self.selections.disjoint_anchors_arc(),
 194                    self.selections.line_mode(),
 195                    self.cursor_shape,
 196                    cx,
 197                );
 198            });
 199        }
 200        cx.notify();
 201    }
 202
 203    fn to_state_proto(&self, _: &Window, cx: &App) -> Option<proto::view::Variant> {
 204        let buffer = self.buffer.read(cx);
 205        if buffer
 206            .as_singleton()
 207            .and_then(|buffer| buffer.read(cx).file())
 208            .is_some_and(|file| file.is_private())
 209        {
 210            return None;
 211        }
 212
 213        let scroll_anchor = self.scroll_manager.anchor();
 214        let excerpts = buffer
 215            .read(cx)
 216            .excerpts()
 217            .map(|(id, buffer, range)| proto::Excerpt {
 218                id: id.to_proto(),
 219                buffer_id: buffer.remote_id().into(),
 220                context_start: Some(serialize_text_anchor(&range.context.start)),
 221                context_end: Some(serialize_text_anchor(&range.context.end)),
 222                primary_start: Some(serialize_text_anchor(&range.primary.start)),
 223                primary_end: Some(serialize_text_anchor(&range.primary.end)),
 224            })
 225            .collect();
 226        let snapshot = buffer.snapshot(cx);
 227
 228        Some(proto::view::Variant::Editor(proto::view::Editor {
 229            singleton: buffer.is_singleton(),
 230            title: buffer.explicit_title().map(ToOwned::to_owned),
 231            excerpts,
 232            scroll_top_anchor: Some(serialize_anchor(&scroll_anchor.anchor, &snapshot)),
 233            scroll_x: scroll_anchor.offset.x,
 234            scroll_y: scroll_anchor.offset.y,
 235            selections: self
 236                .selections
 237                .disjoint_anchors_arc()
 238                .iter()
 239                .map(|s| serialize_selection(s, &snapshot))
 240                .collect(),
 241            pending_selection: self
 242                .selections
 243                .pending_anchor()
 244                .as_ref()
 245                .map(|s| serialize_selection(s, &snapshot)),
 246        }))
 247    }
 248
 249    fn to_follow_event(event: &EditorEvent) -> Option<workspace::item::FollowEvent> {
 250        match event {
 251            EditorEvent::Edited { .. } => Some(FollowEvent::Unfollow),
 252            EditorEvent::SelectionsChanged { local }
 253            | EditorEvent::ScrollPositionChanged { local, .. } => {
 254                if *local {
 255                    Some(FollowEvent::Unfollow)
 256                } else {
 257                    None
 258                }
 259            }
 260            _ => None,
 261        }
 262    }
 263
 264    fn add_event_to_update_proto(
 265        &self,
 266        event: &EditorEvent,
 267        update: &mut Option<proto::update_view::Variant>,
 268        _: &Window,
 269        cx: &App,
 270    ) -> bool {
 271        let update =
 272            update.get_or_insert_with(|| proto::update_view::Variant::Editor(Default::default()));
 273
 274        match update {
 275            proto::update_view::Variant::Editor(update) => match event {
 276                EditorEvent::ExcerptsAdded {
 277                    buffer,
 278                    predecessor,
 279                    excerpts,
 280                } => {
 281                    let buffer_id = buffer.read(cx).remote_id();
 282                    let mut excerpts = excerpts.iter();
 283                    if let Some((id, range)) = excerpts.next() {
 284                        update.inserted_excerpts.push(proto::ExcerptInsertion {
 285                            previous_excerpt_id: Some(predecessor.to_proto()),
 286                            excerpt: serialize_excerpt(buffer_id, id, range),
 287                        });
 288                        update.inserted_excerpts.extend(excerpts.map(|(id, range)| {
 289                            proto::ExcerptInsertion {
 290                                previous_excerpt_id: None,
 291                                excerpt: serialize_excerpt(buffer_id, id, range),
 292                            }
 293                        }))
 294                    }
 295                    true
 296                }
 297                EditorEvent::ExcerptsRemoved { ids, .. } => {
 298                    update
 299                        .deleted_excerpts
 300                        .extend(ids.iter().copied().map(ExcerptId::to_proto));
 301                    true
 302                }
 303                EditorEvent::ScrollPositionChanged { autoscroll, .. } if !autoscroll => {
 304                    let snapshot = self.buffer.read(cx).snapshot(cx);
 305                    let scroll_anchor = self.scroll_manager.anchor();
 306                    update.scroll_top_anchor =
 307                        Some(serialize_anchor(&scroll_anchor.anchor, &snapshot));
 308                    update.scroll_x = scroll_anchor.offset.x;
 309                    update.scroll_y = scroll_anchor.offset.y;
 310                    true
 311                }
 312                EditorEvent::SelectionsChanged { .. } => {
 313                    let snapshot = self.buffer.read(cx).snapshot(cx);
 314                    update.selections = self
 315                        .selections
 316                        .disjoint_anchors_arc()
 317                        .iter()
 318                        .map(|s| serialize_selection(s, &snapshot))
 319                        .collect();
 320                    update.pending_selection = self
 321                        .selections
 322                        .pending_anchor()
 323                        .as_ref()
 324                        .map(|s| serialize_selection(s, &snapshot));
 325                    true
 326                }
 327                _ => false,
 328            },
 329        }
 330    }
 331
 332    fn apply_update_proto(
 333        &mut self,
 334        project: &Entity<Project>,
 335        message: update_view::Variant,
 336        window: &mut Window,
 337        cx: &mut Context<Self>,
 338    ) -> Task<Result<()>> {
 339        let update_view::Variant::Editor(message) = message;
 340        let project = project.clone();
 341        cx.spawn_in(window, async move |this, cx| {
 342            update_editor_from_message(this, project, message, cx).await
 343        })
 344    }
 345
 346    fn is_project_item(&self, _window: &Window, _cx: &App) -> bool {
 347        true
 348    }
 349
 350    fn dedup(&self, existing: &Self, _: &Window, cx: &App) -> Option<Dedup> {
 351        let self_singleton = self.buffer.read(cx).as_singleton()?;
 352        let other_singleton = existing.buffer.read(cx).as_singleton()?;
 353        if self_singleton == other_singleton {
 354            Some(Dedup::KeepExisting)
 355        } else {
 356            None
 357        }
 358    }
 359
 360    fn update_agent_location(
 361        &mut self,
 362        location: language::Anchor,
 363        window: &mut Window,
 364        cx: &mut Context<Self>,
 365    ) {
 366        let buffer = self.buffer.read(cx);
 367        let buffer = buffer.read(cx);
 368        let Some(position) = buffer.as_singleton_anchor(location) else {
 369            return;
 370        };
 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 = message
 459        .selections
 460        .into_iter()
 461        .filter_map(deserialize_selection)
 462        .collect::<Vec<_>>();
 463    let pending_selection = message.pending_selection.and_then(deserialize_selection);
 464    let scroll_top_anchor = message.scroll_top_anchor.and_then(deserialize_anchor);
 465
 466    // Wait until the buffer has received all of the operations referenced by
 467    // the editor's new state.
 468    this.update(cx, |editor, cx| {
 469        editor.buffer.update(cx, |buffer, cx| {
 470            buffer.wait_for_anchors(
 471                selections
 472                    .iter()
 473                    .chain(pending_selection.as_ref())
 474                    .flat_map(|selection| [selection.start, selection.end])
 475                    .chain(scroll_top_anchor),
 476                cx,
 477            )
 478        })
 479    })?
 480    .await?;
 481
 482    // Update the editor's state.
 483    this.update_in(cx, |editor, window, cx| {
 484        if !selections.is_empty() || pending_selection.is_some() {
 485            editor.set_selections_from_remote(selections, pending_selection, window, cx);
 486            editor.request_autoscroll_remotely(Autoscroll::newest(), cx);
 487        } else if let Some(scroll_top_anchor) = scroll_top_anchor {
 488            editor.set_scroll_anchor_remote(
 489                ScrollAnchor {
 490                    anchor: scroll_top_anchor,
 491                    offset: point(message.scroll_x, message.scroll_y),
 492                },
 493                window,
 494                cx,
 495            );
 496        }
 497    })?;
 498    Ok(())
 499}
 500
 501fn serialize_excerpt(
 502    buffer_id: BufferId,
 503    id: &ExcerptId,
 504    range: &ExcerptRange<language::Anchor>,
 505) -> Option<proto::Excerpt> {
 506    Some(proto::Excerpt {
 507        id: id.to_proto(),
 508        buffer_id: buffer_id.into(),
 509        context_start: Some(serialize_text_anchor(&range.context.start)),
 510        context_end: Some(serialize_text_anchor(&range.context.end)),
 511        primary_start: Some(serialize_text_anchor(&range.primary.start)),
 512        primary_end: Some(serialize_text_anchor(&range.primary.end)),
 513    })
 514}
 515
 516fn serialize_selection(
 517    selection: &Selection<Anchor>,
 518    buffer: &MultiBufferSnapshot,
 519) -> proto::Selection {
 520    proto::Selection {
 521        id: selection.id as u64,
 522        start: Some(serialize_anchor(&selection.start, buffer)),
 523        end: Some(serialize_anchor(&selection.end, buffer)),
 524        reversed: selection.reversed,
 525    }
 526}
 527
 528fn serialize_anchor(anchor: &Anchor, buffer: &MultiBufferSnapshot) -> proto::EditorAnchor {
 529    proto::EditorAnchor {
 530        excerpt_id: buffer.latest_excerpt_id(anchor.excerpt_id).to_proto(),
 531        anchor: Some(serialize_text_anchor(&anchor.text_anchor)),
 532    }
 533}
 534
 535fn deserialize_excerpt_range(
 536    excerpt: proto::Excerpt,
 537) -> Option<(ExcerptId, ExcerptRange<language::Anchor>)> {
 538    let context = {
 539        let start = language::proto::deserialize_anchor(excerpt.context_start?)?;
 540        let end = language::proto::deserialize_anchor(excerpt.context_end?)?;
 541        start..end
 542    };
 543    let primary = excerpt
 544        .primary_start
 545        .zip(excerpt.primary_end)
 546        .and_then(|(start, end)| {
 547            let start = language::proto::deserialize_anchor(start)?;
 548            let end = language::proto::deserialize_anchor(end)?;
 549            Some(start..end)
 550        })
 551        .unwrap_or_else(|| context.clone());
 552    Some((
 553        ExcerptId::from_proto(excerpt.id),
 554        ExcerptRange { context, primary },
 555    ))
 556}
 557
 558fn deserialize_selection(selection: proto::Selection) -> Option<Selection<Anchor>> {
 559    Some(Selection {
 560        id: selection.id as usize,
 561        start: deserialize_anchor(selection.start?)?,
 562        end: deserialize_anchor(selection.end?)?,
 563        reversed: selection.reversed,
 564        goal: SelectionGoal::None,
 565    })
 566}
 567
 568fn deserialize_anchor(anchor: proto::EditorAnchor) -> Option<Anchor> {
 569    let excerpt_id = ExcerptId::from_proto(anchor.excerpt_id);
 570    Some(Anchor::in_buffer(
 571        excerpt_id,
 572        language::proto::deserialize_anchor(anchor.anchor?)?,
 573    ))
 574}
 575
 576impl Item for Editor {
 577    type Event = EditorEvent;
 578
 579    fn act_as_type<'a>(
 580        &'a self,
 581        type_id: TypeId,
 582        self_handle: &'a Entity<Self>,
 583        cx: &'a App,
 584    ) -> Option<gpui::AnyEntity> {
 585        if TypeId::of::<Self>() == type_id {
 586            Some(self_handle.clone().into())
 587        } else if TypeId::of::<MultiBuffer>() == type_id {
 588            Some(self_handle.read(cx).buffer.clone().into())
 589        } else {
 590            None
 591        }
 592    }
 593
 594    fn navigate(
 595        &mut self,
 596        data: Box<dyn std::any::Any>,
 597        window: &mut Window,
 598        cx: &mut Context<Self>,
 599    ) -> bool {
 600        if let Ok(data) = data.downcast::<NavigationData>() {
 601            let newest_selection = self.selections.newest::<Point>(&self.display_snapshot(cx));
 602            let buffer = self.buffer.read(cx).read(cx);
 603            let offset = if buffer.can_resolve(&data.cursor_anchor) {
 604                data.cursor_anchor.to_point(&buffer)
 605            } else {
 606                buffer.clip_point(data.cursor_position, Bias::Left)
 607            };
 608
 609            let mut scroll_anchor = data.scroll_anchor;
 610            if !buffer.can_resolve(&scroll_anchor.anchor) {
 611                scroll_anchor.anchor = buffer.anchor_before(
 612                    buffer.clip_point(Point::new(data.scroll_top_row, 0), Bias::Left),
 613                );
 614            }
 615
 616            drop(buffer);
 617
 618            if newest_selection.head() == offset {
 619                false
 620            } else {
 621                self.set_scroll_anchor(scroll_anchor, window, cx);
 622                self.change_selections(
 623                    SelectionEffects::default().nav_history(false),
 624                    window,
 625                    cx,
 626                    |s| s.select_ranges([offset..offset]),
 627                );
 628                true
 629            }
 630        } else {
 631            false
 632        }
 633    }
 634
 635    fn tab_tooltip_text(&self, cx: &App) -> Option<SharedString> {
 636        self.buffer()
 637            .read(cx)
 638            .as_singleton()
 639            .and_then(|buffer| buffer.read(cx).file())
 640            .and_then(|file| File::from_dyn(Some(file)))
 641            .map(|file| {
 642                file.worktree
 643                    .read(cx)
 644                    .absolutize(&file.path)
 645                    .compact()
 646                    .to_string_lossy()
 647                    .into_owned()
 648                    .into()
 649            })
 650    }
 651
 652    fn telemetry_event_text(&self) -> Option<&'static str> {
 653        None
 654    }
 655
 656    fn tab_content_text(&self, detail: usize, cx: &App) -> SharedString {
 657        if let Some(path) = path_for_buffer(&self.buffer, detail, true, cx) {
 658            path.to_string().into()
 659        } else {
 660            // Use the same logic as the displayed title for consistency
 661            self.buffer.read(cx).title(cx).to_string().into()
 662        }
 663    }
 664
 665    fn suggested_filename(&self, cx: &App) -> SharedString {
 666        self.buffer.read(cx).title(cx).to_string().into()
 667    }
 668
 669    fn tab_icon(&self, _: &Window, cx: &App) -> Option<Icon> {
 670        ItemSettings::get_global(cx)
 671            .file_icons
 672            .then(|| {
 673                path_for_buffer(&self.buffer, 0, true, cx)
 674                    .and_then(|path| FileIcons::get_icon(Path::new(&*path), cx))
 675            })
 676            .flatten()
 677            .map(Icon::from_path)
 678    }
 679
 680    fn tab_content(&self, params: TabContentParams, _: &Window, cx: &App) -> AnyElement {
 681        let label_color = if ItemSettings::get_global(cx).git_status {
 682            self.buffer()
 683                .read(cx)
 684                .as_singleton()
 685                .and_then(|buffer| {
 686                    let buffer = buffer.read(cx);
 687                    let path = buffer.project_path(cx)?;
 688                    let buffer_id = buffer.remote_id();
 689                    let project = self.project()?.read(cx);
 690                    let entry = project.entry_for_path(&path, cx)?;
 691                    let (repo, repo_path) = project
 692                        .git_store()
 693                        .read(cx)
 694                        .repository_and_path_for_buffer_id(buffer_id, cx)?;
 695                    let status = repo.read(cx).status_for_path(&repo_path)?.status;
 696
 697                    Some(entry_git_aware_label_color(
 698                        status.summary(),
 699                        entry.is_ignored,
 700                        params.selected,
 701                    ))
 702                })
 703                .unwrap_or_else(|| entry_label_color(params.selected))
 704        } else {
 705            entry_label_color(params.selected)
 706        };
 707
 708        let description = params.detail.and_then(|detail| {
 709            let path = path_for_buffer(&self.buffer, detail, false, cx)?;
 710            let description = path.trim();
 711
 712            if description.is_empty() {
 713                return None;
 714            }
 715
 716            Some(util::truncate_and_trailoff(description, MAX_TAB_TITLE_LEN))
 717        });
 718
 719        // Whether the file was saved in the past but is now deleted.
 720        let was_deleted: bool = self
 721            .buffer()
 722            .read(cx)
 723            .as_singleton()
 724            .and_then(|buffer| buffer.read(cx).file())
 725            .is_some_and(|file| file.disk_state().is_deleted());
 726
 727        h_flex()
 728            .gap_2()
 729            .child(
 730                Label::new(self.title(cx).to_string())
 731                    .color(label_color)
 732                    .when(params.preview, |this| this.italic())
 733                    .when(was_deleted, |this| this.strikethrough()),
 734            )
 735            .when_some(description, |this, description| {
 736                this.child(
 737                    Label::new(description)
 738                        .size(LabelSize::XSmall)
 739                        .color(Color::Muted),
 740                )
 741            })
 742            .into_any_element()
 743    }
 744
 745    fn for_each_project_item(
 746        &self,
 747        cx: &App,
 748        f: &mut dyn FnMut(EntityId, &dyn project::ProjectItem),
 749    ) {
 750        self.buffer
 751            .read(cx)
 752            .for_each_buffer(|buffer| f(buffer.entity_id(), buffer.read(cx)));
 753    }
 754
 755    fn buffer_kind(&self, cx: &App) -> ItemBufferKind {
 756        match self.buffer.read(cx).is_singleton() {
 757            true => ItemBufferKind::Singleton,
 758            false => ItemBufferKind::Multibuffer,
 759        }
 760    }
 761
 762    fn can_save_as(&self, cx: &App) -> bool {
 763        self.buffer.read(cx).is_singleton()
 764    }
 765
 766    fn can_split(&self) -> bool {
 767        true
 768    }
 769
 770    fn clone_on_split(
 771        &self,
 772        _workspace_id: Option<WorkspaceId>,
 773        window: &mut Window,
 774        cx: &mut Context<Self>,
 775    ) -> Task<Option<Entity<Editor>>>
 776    where
 777        Self: Sized,
 778    {
 779        Task::ready(Some(cx.new(|cx| self.clone(window, cx))))
 780    }
 781
 782    fn set_nav_history(
 783        &mut self,
 784        history: ItemNavHistory,
 785        _window: &mut Window,
 786        _: &mut Context<Self>,
 787    ) {
 788        self.nav_history = Some(history);
 789    }
 790
 791    fn on_removed(&self, cx: &App) {
 792        self.report_editor_event(ReportEditorEvent::Closed, None, cx);
 793    }
 794
 795    fn deactivated(&mut self, _: &mut Window, cx: &mut Context<Self>) {
 796        let selection = self.selections.newest_anchor();
 797        self.push_to_nav_history(selection.head(), None, true, false, cx);
 798    }
 799
 800    fn workspace_deactivated(&mut self, _: &mut Window, cx: &mut Context<Self>) {
 801        self.hide_hovered_link(cx);
 802    }
 803
 804    fn is_dirty(&self, cx: &App) -> bool {
 805        self.buffer().read(cx).read(cx).is_dirty()
 806    }
 807
 808    fn capability(&self, cx: &App) -> Capability {
 809        self.capability(cx)
 810    }
 811
 812    // Note: this mirrors the logic in `Editor::toggle_read_only`, but is reachable
 813    // without relying on focus-based action dispatch.
 814    fn toggle_read_only(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 815        if let Some(buffer) = self.buffer.read(cx).as_singleton() {
 816            buffer.update(cx, |buffer, cx| {
 817                buffer.set_capability(
 818                    match buffer.capability() {
 819                        Capability::ReadWrite => Capability::Read,
 820                        Capability::Read => Capability::ReadWrite,
 821                        Capability::ReadOnly => Capability::ReadOnly,
 822                    },
 823                    cx,
 824                );
 825            });
 826        }
 827        cx.notify();
 828        window.refresh();
 829    }
 830
 831    fn has_deleted_file(&self, cx: &App) -> bool {
 832        self.buffer().read(cx).read(cx).has_deleted_file()
 833    }
 834
 835    fn has_conflict(&self, cx: &App) -> bool {
 836        self.buffer().read(cx).read(cx).has_conflict()
 837    }
 838
 839    fn can_save(&self, cx: &App) -> bool {
 840        let buffer = &self.buffer().read(cx);
 841        if let Some(buffer) = buffer.as_singleton() {
 842            buffer.read(cx).project_path(cx).is_some()
 843        } else {
 844            true
 845        }
 846    }
 847
 848    fn save(
 849        &mut self,
 850        options: SaveOptions,
 851        project: Entity<Project>,
 852        window: &mut Window,
 853        cx: &mut Context<Self>,
 854    ) -> Task<Result<()>> {
 855        // Add meta data tracking # of auto saves
 856        if options.autosave {
 857            self.report_editor_event(ReportEditorEvent::Saved { auto_saved: true }, None, cx);
 858        } else {
 859            self.report_editor_event(ReportEditorEvent::Saved { auto_saved: false }, None, cx);
 860        }
 861
 862        let buffers = self.buffer().clone().read(cx).all_buffers();
 863        let buffers = buffers
 864            .into_iter()
 865            .map(|handle| handle.read(cx).base_buffer().unwrap_or(handle.clone()))
 866            .collect::<HashSet<_>>();
 867
 868        let buffers_to_save = if self.buffer.read(cx).is_singleton() && !options.autosave {
 869            buffers
 870        } else {
 871            buffers
 872                .into_iter()
 873                .filter(|buffer| buffer.read(cx).is_dirty())
 874                .collect()
 875        };
 876
 877        cx.spawn_in(window, async move |this, cx| {
 878            if options.format {
 879                this.update_in(cx, |editor, window, cx| {
 880                    editor.perform_format(
 881                        project.clone(),
 882                        FormatTrigger::Save,
 883                        FormatTarget::Buffers(buffers_to_save.clone()),
 884                        window,
 885                        cx,
 886                    )
 887                })?
 888                .await?;
 889            }
 890
 891            if !buffers_to_save.is_empty() {
 892                project
 893                    .update(cx, |project, cx| {
 894                        project.save_buffers(buffers_to_save.clone(), cx)
 895                    })?
 896                    .await?;
 897            }
 898
 899            Ok(())
 900        })
 901    }
 902
 903    fn save_as(
 904        &mut self,
 905        project: Entity<Project>,
 906        path: ProjectPath,
 907        _: &mut Window,
 908        cx: &mut Context<Self>,
 909    ) -> Task<Result<()>> {
 910        let buffer = self
 911            .buffer()
 912            .read(cx)
 913            .as_singleton()
 914            .expect("cannot call save_as on an excerpt list");
 915
 916        let file_extension = path.path.extension().map(|a| a.to_string());
 917        self.report_editor_event(
 918            ReportEditorEvent::Saved { auto_saved: false },
 919            file_extension,
 920            cx,
 921        );
 922
 923        project.update(cx, |project, cx| project.save_buffer_as(buffer, path, cx))
 924    }
 925
 926    fn reload(
 927        &mut self,
 928        project: Entity<Project>,
 929        window: &mut Window,
 930        cx: &mut Context<Self>,
 931    ) -> Task<Result<()>> {
 932        let buffer = self.buffer().clone();
 933        let buffers = self.buffer.read(cx).all_buffers();
 934        let reload_buffers =
 935            project.update(cx, |project, cx| project.reload_buffers(buffers, true, cx));
 936        cx.spawn_in(window, async move |this, cx| {
 937            let transaction = reload_buffers.log_err().await;
 938            this.update(cx, |editor, cx| {
 939                editor.request_autoscroll(Autoscroll::fit(), cx)
 940            })?;
 941            buffer
 942                .update(cx, |buffer, cx| {
 943                    if let Some(transaction) = transaction
 944                        && !buffer.is_singleton()
 945                    {
 946                        buffer.push_transaction(&transaction.0, cx);
 947                    }
 948                })
 949                .ok();
 950            Ok(())
 951        })
 952    }
 953
 954    fn as_searchable(
 955        &self,
 956        handle: &Entity<Self>,
 957        _: &App,
 958    ) -> Option<Box<dyn SearchableItemHandle>> {
 959        Some(Box::new(handle.clone()))
 960    }
 961
 962    fn pixel_position_of_cursor(&self, _: &App) -> Option<gpui::Point<Pixels>> {
 963        self.pixel_position_of_newest_cursor
 964    }
 965
 966    fn breadcrumb_location(&self, cx: &App) -> ToolbarItemLocation {
 967        if self.show_breadcrumbs && self.buffer().read(cx).is_singleton() {
 968            ToolbarItemLocation::PrimaryLeft
 969        } else {
 970            ToolbarItemLocation::Hidden
 971        }
 972    }
 973
 974    // In a non-singleton case, the breadcrumbs are actually shown on sticky file headers of the multibuffer.
 975    fn breadcrumbs(&self, variant: &Theme, cx: &App) -> Option<Vec<BreadcrumbText>> {
 976        if self.buffer.read(cx).is_singleton() {
 977            self.breadcrumbs_inner(variant, cx)
 978        } else {
 979            None
 980        }
 981    }
 982
 983    fn added_to_workspace(
 984        &mut self,
 985        workspace: &mut Workspace,
 986        _window: &mut Window,
 987        cx: &mut Context<Self>,
 988    ) {
 989        self.workspace = Some((workspace.weak_handle(), workspace.database_id()));
 990        if let Some(workspace) = &workspace.weak_handle().upgrade() {
 991            cx.subscribe(workspace, |editor, _, event: &workspace::Event, _cx| {
 992                if let workspace::Event::ModalOpened = event {
 993                    editor.mouse_context_menu.take();
 994                    editor.inline_blame_popover.take();
 995                }
 996            })
 997            .detach();
 998        }
 999    }
1000
1001    fn to_item_events(event: &EditorEvent, mut f: impl FnMut(ItemEvent)) {
1002        match event {
1003            EditorEvent::Saved | EditorEvent::TitleChanged => {
1004                f(ItemEvent::UpdateTab);
1005                f(ItemEvent::UpdateBreadcrumbs);
1006            }
1007
1008            EditorEvent::Reparsed(_) => {
1009                f(ItemEvent::UpdateBreadcrumbs);
1010            }
1011
1012            EditorEvent::SelectionsChanged { local } if *local => {
1013                f(ItemEvent::UpdateBreadcrumbs);
1014            }
1015
1016            EditorEvent::BreadcrumbsChanged => {
1017                f(ItemEvent::UpdateBreadcrumbs);
1018            }
1019
1020            EditorEvent::DirtyChanged => {
1021                f(ItemEvent::UpdateTab);
1022            }
1023
1024            EditorEvent::BufferEdited => {
1025                f(ItemEvent::Edit);
1026                f(ItemEvent::UpdateBreadcrumbs);
1027            }
1028
1029            EditorEvent::ExcerptsAdded { .. } | EditorEvent::ExcerptsRemoved { .. } => {
1030                f(ItemEvent::Edit);
1031            }
1032
1033            _ => {}
1034        }
1035    }
1036
1037    fn preserve_preview(&self, cx: &App) -> bool {
1038        self.buffer.read(cx).preserve_preview(cx)
1039    }
1040}
1041
1042impl SerializableItem for Editor {
1043    fn serialized_item_kind() -> &'static str {
1044        "Editor"
1045    }
1046
1047    fn cleanup(
1048        workspace_id: WorkspaceId,
1049        alive_items: Vec<ItemId>,
1050        _window: &mut Window,
1051        cx: &mut App,
1052    ) -> Task<Result<()>> {
1053        workspace::delete_unloaded_items(alive_items, workspace_id, "editors", &DB, cx)
1054    }
1055
1056    fn deserialize(
1057        project: Entity<Project>,
1058        workspace: WeakEntity<Workspace>,
1059        workspace_id: workspace::WorkspaceId,
1060        item_id: ItemId,
1061        window: &mut Window,
1062        cx: &mut App,
1063    ) -> Task<Result<Entity<Self>>> {
1064        let serialized_editor = match DB
1065            .get_serialized_editor(item_id, workspace_id)
1066            .context("Failed to query editor state")
1067        {
1068            Ok(Some(serialized_editor)) => {
1069                if ProjectSettings::get_global(cx)
1070                    .session
1071                    .restore_unsaved_buffers
1072                {
1073                    serialized_editor
1074                } else {
1075                    SerializedEditor {
1076                        abs_path: serialized_editor.abs_path,
1077                        contents: None,
1078                        language: None,
1079                        mtime: None,
1080                    }
1081                }
1082            }
1083            Ok(None) => {
1084                return Task::ready(Err(anyhow!(
1085                    "Unable to deserialize editor: No entry in database for item_id: {item_id} and workspace_id {workspace_id:?}"
1086                )));
1087            }
1088            Err(error) => {
1089                return Task::ready(Err(error));
1090            }
1091        };
1092        log::debug!(
1093            "Deserialized editor {item_id:?} in workspace {workspace_id:?}, {serialized_editor:?}"
1094        );
1095
1096        match serialized_editor {
1097            SerializedEditor {
1098                abs_path: None,
1099                contents: Some(contents),
1100                language,
1101                ..
1102            } => window.spawn(cx, {
1103                let project = project.clone();
1104                async move |cx| {
1105                    let language_registry =
1106                        project.read_with(cx, |project, _| project.languages().clone())?;
1107
1108                    let language = if let Some(language_name) = language {
1109                        // We don't fail here, because we'd rather not set the language if the name changed
1110                        // than fail to restore the buffer.
1111                        language_registry
1112                            .language_for_name(&language_name)
1113                            .await
1114                            .ok()
1115                    } else {
1116                        None
1117                    };
1118
1119                    // First create the empty buffer
1120                    let buffer = project
1121                        .update(cx, |project, cx| project.create_buffer(true, cx))?
1122                        .await
1123                        .context("Failed to create buffer while deserializing editor")?;
1124
1125                    // Then set the text so that the dirty bit is set correctly
1126                    buffer.update(cx, |buffer, cx| {
1127                        buffer.set_language_registry(language_registry);
1128                        if let Some(language) = language {
1129                            buffer.set_language(Some(language), cx);
1130                        }
1131                        buffer.set_text(contents, cx);
1132                        if let Some(entry) = buffer.peek_undo_stack() {
1133                            buffer.forget_transaction(entry.transaction_id());
1134                        }
1135                    })?;
1136
1137                    cx.update(|window, cx| {
1138                        cx.new(|cx| {
1139                            let mut editor = Editor::for_buffer(buffer, Some(project), window, cx);
1140
1141                            editor.read_metadata_from_db(item_id, workspace_id, window, cx);
1142                            editor
1143                        })
1144                    })
1145                }
1146            }),
1147            SerializedEditor {
1148                abs_path: Some(abs_path),
1149                contents,
1150                mtime,
1151                ..
1152            } => {
1153                let opened_buffer = project.update(cx, |project, cx| {
1154                    let (worktree, path) = project.find_worktree(&abs_path, cx)?;
1155                    let project_path = ProjectPath {
1156                        worktree_id: worktree.read(cx).id(),
1157                        path: path,
1158                    };
1159                    Some(project.open_path(project_path, cx))
1160                });
1161
1162                match opened_buffer {
1163                    Some(opened_buffer) => {
1164                        window.spawn(cx, async move |cx| {
1165                            let (_, buffer) = opened_buffer
1166                                .await
1167                                .context("Failed to open path in project")?;
1168
1169                            // This is a bit wasteful: we're loading the whole buffer from
1170                            // disk and then overwrite the content.
1171                            // But for now, it keeps the implementation of the content serialization
1172                            // simple, because we don't have to persist all of the metadata that we get
1173                            // by loading the file (git diff base, ...).
1174                            if let Some(buffer_text) = contents {
1175                                buffer.update(cx, |buffer, cx| {
1176                                    // If we did restore an mtime, we want to store it on the buffer
1177                                    // so that the next edit will mark the buffer as dirty/conflicted.
1178                                    if mtime.is_some() {
1179                                        buffer.did_reload(
1180                                            buffer.version(),
1181                                            buffer.line_ending(),
1182                                            mtime,
1183                                            cx,
1184                                        );
1185                                    }
1186                                    buffer.set_text(buffer_text, cx);
1187                                    if let Some(entry) = buffer.peek_undo_stack() {
1188                                        buffer.forget_transaction(entry.transaction_id());
1189                                    }
1190                                })?;
1191                            }
1192
1193                            cx.update(|window, cx| {
1194                                cx.new(|cx| {
1195                                    let mut editor =
1196                                        Editor::for_buffer(buffer, Some(project), window, cx);
1197
1198                                    editor.read_metadata_from_db(item_id, workspace_id, window, cx);
1199                                    editor
1200                                })
1201                            })
1202                        })
1203                    }
1204                    None => {
1205                        let open_by_abs_path = workspace.update(cx, |workspace, cx| {
1206                            workspace.open_abs_path(
1207                                abs_path.clone(),
1208                                OpenOptions {
1209                                    visible: Some(OpenVisible::None),
1210                                    ..Default::default()
1211                                },
1212                                window,
1213                                cx,
1214                            )
1215                        });
1216                        window.spawn(cx, async move |cx| {
1217                            let editor = open_by_abs_path?.await?.downcast::<Editor>().with_context(|| format!("Failed to downcast to Editor after opening abs path {abs_path:?}"))?;
1218                            editor.update_in(cx, |editor, window, cx| {
1219                                editor.read_metadata_from_db(item_id, workspace_id, window, cx);
1220                            })?;
1221                            Ok(editor)
1222                        })
1223                    }
1224                }
1225            }
1226            SerializedEditor {
1227                abs_path: None,
1228                contents: None,
1229                ..
1230            } => window.spawn(cx, async move |cx| {
1231                let buffer = project
1232                    .update(cx, |project, cx| project.create_buffer(true, cx))?
1233                    .await
1234                    .context("Failed to create buffer")?;
1235
1236                cx.update(|window, cx| {
1237                    cx.new(|cx| {
1238                        let mut editor = Editor::for_buffer(buffer, Some(project), window, cx);
1239
1240                        editor.read_metadata_from_db(item_id, workspace_id, window, cx);
1241                        editor
1242                    })
1243                })
1244            }),
1245        }
1246    }
1247
1248    fn serialize(
1249        &mut self,
1250        workspace: &mut Workspace,
1251        item_id: ItemId,
1252        closing: bool,
1253        window: &mut Window,
1254        cx: &mut Context<Self>,
1255    ) -> Option<Task<Result<()>>> {
1256        let buffer_serialization = self.buffer_serialization?;
1257        let project = self.project.clone()?;
1258
1259        let serialize_dirty_buffers = match buffer_serialization {
1260            // If we don't have a worktree, we don't serialize, because
1261            // projects without worktrees aren't deserialized.
1262            BufferSerialization::All => project.read(cx).visible_worktrees(cx).next().is_some(),
1263            BufferSerialization::NonDirtyBuffers => false,
1264        };
1265
1266        if closing && !serialize_dirty_buffers {
1267            return None;
1268        }
1269
1270        let workspace_id = workspace.database_id()?;
1271
1272        let buffer = self.buffer().read(cx).as_singleton()?;
1273
1274        let abs_path = buffer.read(cx).file().and_then(|file| {
1275            let worktree_id = file.worktree_id(cx);
1276            project
1277                .read(cx)
1278                .worktree_for_id(worktree_id, cx)
1279                .map(|worktree| worktree.read(cx).absolutize(file.path()))
1280                .or_else(|| {
1281                    let full_path = file.full_path(cx);
1282                    let project_path = project.read(cx).find_project_path(&full_path, cx)?;
1283                    project.read(cx).absolute_path(&project_path, cx)
1284                })
1285        });
1286
1287        let is_dirty = buffer.read(cx).is_dirty();
1288        let mtime = buffer.read(cx).saved_mtime();
1289
1290        let snapshot = buffer.read(cx).snapshot();
1291
1292        Some(cx.spawn_in(window, async move |_this, cx| {
1293            cx.background_spawn(async move {
1294                let (contents, language) = if serialize_dirty_buffers && is_dirty {
1295                    let contents = snapshot.text();
1296                    let language = snapshot.language().map(|lang| lang.name().to_string());
1297                    (Some(contents), language)
1298                } else {
1299                    (None, None)
1300                };
1301
1302                let editor = SerializedEditor {
1303                    abs_path,
1304                    contents,
1305                    language,
1306                    mtime,
1307                };
1308                log::debug!("Serializing editor {item_id:?} in workspace {workspace_id:?}");
1309                DB.save_serialized_editor(item_id, workspace_id, editor)
1310                    .await
1311                    .context("failed to save serialized editor")
1312            })
1313            .await
1314            .context("failed to save contents of buffer")?;
1315
1316            Ok(())
1317        }))
1318    }
1319
1320    fn should_serialize(&self, event: &Self::Event) -> bool {
1321        self.should_serialize_buffer()
1322            && matches!(
1323                event,
1324                EditorEvent::Saved | EditorEvent::DirtyChanged | EditorEvent::BufferEdited
1325            )
1326    }
1327}
1328
1329#[derive(Debug, Default)]
1330struct EditorRestorationData {
1331    entries: HashMap<PathBuf, RestorationData>,
1332}
1333
1334#[derive(Default, Debug)]
1335pub struct RestorationData {
1336    pub scroll_position: (BufferRow, gpui::Point<ScrollOffset>),
1337    pub folds: Vec<Range<Point>>,
1338    pub selections: Vec<Range<Point>>,
1339}
1340
1341impl ProjectItem for Editor {
1342    type Item = Buffer;
1343
1344    fn project_item_kind() -> Option<ProjectItemKind> {
1345        Some(ProjectItemKind("Editor"))
1346    }
1347
1348    fn for_project_item(
1349        project: Entity<Project>,
1350        pane: Option<&Pane>,
1351        buffer: Entity<Buffer>,
1352        window: &mut Window,
1353        cx: &mut Context<Self>,
1354    ) -> Self {
1355        let mut editor = Self::for_buffer(buffer.clone(), Some(project), window, cx);
1356        if let Some((excerpt_id, _, snapshot)) =
1357            editor.buffer().read(cx).snapshot(cx).as_singleton()
1358            && WorkspaceSettings::get(None, cx).restore_on_file_reopen
1359            && let Some(restoration_data) = Self::project_item_kind()
1360                .and_then(|kind| pane.as_ref()?.project_item_restoration_data.get(&kind))
1361                .and_then(|data| data.downcast_ref::<EditorRestorationData>())
1362                .and_then(|data| {
1363                    let file = project::File::from_dyn(buffer.read(cx).file())?;
1364                    data.entries.get(&file.abs_path(cx))
1365                })
1366        {
1367            editor.fold_ranges(
1368                clip_ranges(&restoration_data.folds, snapshot),
1369                false,
1370                window,
1371                cx,
1372            );
1373            if !restoration_data.selections.is_empty() {
1374                editor.change_selections(SelectionEffects::no_scroll(), window, cx, |s| {
1375                    s.select_ranges(clip_ranges(&restoration_data.selections, snapshot));
1376                });
1377            }
1378            let (top_row, offset) = restoration_data.scroll_position;
1379            let anchor =
1380                Anchor::in_buffer(*excerpt_id, snapshot.anchor_before(Point::new(top_row, 0)));
1381            editor.set_scroll_anchor(ScrollAnchor { anchor, offset }, window, cx);
1382        }
1383
1384        editor
1385    }
1386
1387    fn for_broken_project_item(
1388        abs_path: &Path,
1389        is_local: bool,
1390        e: &anyhow::Error,
1391        window: &mut Window,
1392        cx: &mut App,
1393    ) -> Option<InvalidItemView> {
1394        Some(InvalidItemView::new(abs_path, is_local, e, window, cx))
1395    }
1396}
1397
1398fn clip_ranges<'a>(
1399    original: impl IntoIterator<Item = &'a Range<Point>> + 'a,
1400    snapshot: &'a BufferSnapshot,
1401) -> Vec<Range<Point>> {
1402    original
1403        .into_iter()
1404        .map(|range| {
1405            snapshot.clip_point(range.start, Bias::Left)
1406                ..snapshot.clip_point(range.end, Bias::Right)
1407        })
1408        .collect()
1409}
1410
1411impl EventEmitter<SearchEvent> for Editor {}
1412
1413impl Editor {
1414    pub fn update_restoration_data(
1415        &self,
1416        cx: &mut Context<Self>,
1417        write: impl for<'a> FnOnce(&'a mut RestorationData) + 'static,
1418    ) {
1419        if self.mode.is_minimap() || !WorkspaceSettings::get(None, cx).restore_on_file_reopen {
1420            return;
1421        }
1422
1423        let editor = cx.entity();
1424        cx.defer(move |cx| {
1425            editor.update(cx, |editor, cx| {
1426                let kind = Editor::project_item_kind()?;
1427                let pane = editor.workspace()?.read(cx).pane_for(&cx.entity())?;
1428                let buffer = editor.buffer().read(cx).as_singleton()?;
1429                let file_abs_path = project::File::from_dyn(buffer.read(cx).file())?.abs_path(cx);
1430                pane.update(cx, |pane, _| {
1431                    let data = pane
1432                        .project_item_restoration_data
1433                        .entry(kind)
1434                        .or_insert_with(|| Box::new(EditorRestorationData::default()) as Box<_>);
1435                    let data = match data.downcast_mut::<EditorRestorationData>() {
1436                        Some(data) => data,
1437                        None => {
1438                            *data = Box::new(EditorRestorationData::default());
1439                            data.downcast_mut::<EditorRestorationData>()
1440                                .expect("just written the type downcasted to")
1441                        }
1442                    };
1443
1444                    let data = data.entries.entry(file_abs_path).or_default();
1445                    write(data);
1446                    Some(())
1447                })
1448            });
1449        });
1450    }
1451}
1452
1453pub(crate) enum BufferSearchHighlights {}
1454impl SearchableItem for Editor {
1455    type Match = Range<Anchor>;
1456
1457    fn get_matches(&self, _window: &mut Window, _: &mut App) -> Vec<Range<Anchor>> {
1458        self.background_highlights
1459            .get(&HighlightKey::Type(TypeId::of::<BufferSearchHighlights>()))
1460            .map_or(Vec::new(), |(_color, ranges)| {
1461                ranges.iter().cloned().collect()
1462            })
1463    }
1464
1465    fn clear_matches(&mut self, _: &mut Window, cx: &mut Context<Self>) {
1466        if self
1467            .clear_background_highlights::<BufferSearchHighlights>(cx)
1468            .is_some()
1469        {
1470            cx.emit(SearchEvent::MatchesInvalidated);
1471        }
1472    }
1473
1474    fn update_matches(
1475        &mut self,
1476        matches: &[Range<Anchor>],
1477        active_match_index: Option<usize>,
1478        _: &mut Window,
1479        cx: &mut Context<Self>,
1480    ) {
1481        let existing_range = self
1482            .background_highlights
1483            .get(&HighlightKey::Type(TypeId::of::<BufferSearchHighlights>()))
1484            .map(|(_, range)| range.as_ref());
1485        let updated = existing_range != Some(matches);
1486        self.highlight_background::<BufferSearchHighlights>(
1487            matches,
1488            move |index, theme| {
1489                if active_match_index == Some(*index) {
1490                    theme.colors().search_active_match_background
1491                } else {
1492                    theme.colors().search_match_background
1493                }
1494            },
1495            cx,
1496        );
1497        if updated {
1498            cx.emit(SearchEvent::MatchesInvalidated);
1499        }
1500    }
1501
1502    fn has_filtered_search_ranges(&mut self) -> bool {
1503        self.has_background_highlights::<SearchWithinRange>()
1504    }
1505
1506    fn toggle_filtered_search_ranges(
1507        &mut self,
1508        enabled: Option<FilteredSearchRange>,
1509        _: &mut Window,
1510        cx: &mut Context<Self>,
1511    ) {
1512        if self.has_filtered_search_ranges() {
1513            self.previous_search_ranges = self
1514                .clear_background_highlights::<SearchWithinRange>(cx)
1515                .map(|(_, ranges)| ranges)
1516        }
1517
1518        if let Some(range) = enabled {
1519            let ranges = self.selections.disjoint_anchor_ranges().collect::<Vec<_>>();
1520
1521            if ranges.iter().any(|s| s.start != s.end) {
1522                self.set_search_within_ranges(&ranges, cx);
1523            } else if let Some(previous_search_ranges) = self.previous_search_ranges.take()
1524                && range != FilteredSearchRange::Selection
1525            {
1526                self.set_search_within_ranges(&previous_search_ranges, cx);
1527            }
1528        }
1529    }
1530
1531    fn supported_options(&self) -> SearchOptions {
1532        if self.in_project_search {
1533            SearchOptions {
1534                case: true,
1535                word: true,
1536                regex: true,
1537                replacement: false,
1538                selection: false,
1539                find_in_results: true,
1540            }
1541        } else {
1542            SearchOptions {
1543                case: true,
1544                word: true,
1545                regex: true,
1546                replacement: true,
1547                selection: true,
1548                find_in_results: false,
1549            }
1550        }
1551    }
1552
1553    fn query_suggestion(&mut self, window: &mut Window, cx: &mut Context<Self>) -> String {
1554        let setting = EditorSettings::get_global(cx).seed_search_query_from_cursor;
1555        let snapshot = self.snapshot(window, cx);
1556        let selection = self.selections.newest_adjusted(&snapshot.display_snapshot);
1557        let buffer_snapshot = snapshot.buffer_snapshot();
1558
1559        match setting {
1560            SeedQuerySetting::Never => String::new(),
1561            SeedQuerySetting::Selection | SeedQuerySetting::Always if !selection.is_empty() => {
1562                let text: String = buffer_snapshot
1563                    .text_for_range(selection.start..selection.end)
1564                    .collect();
1565                if text.contains('\n') {
1566                    String::new()
1567                } else {
1568                    text
1569                }
1570            }
1571            SeedQuerySetting::Selection => String::new(),
1572            SeedQuerySetting::Always => {
1573                let (range, kind) = buffer_snapshot
1574                    .surrounding_word(selection.start, Some(CharScopeContext::Completion));
1575                if kind == Some(CharKind::Word) {
1576                    let text: String = buffer_snapshot.text_for_range(range).collect();
1577                    if !text.trim().is_empty() {
1578                        return text;
1579                    }
1580                }
1581                String::new()
1582            }
1583        }
1584    }
1585
1586    fn activate_match(
1587        &mut self,
1588        index: usize,
1589        matches: &[Range<Anchor>],
1590        window: &mut Window,
1591        cx: &mut Context<Self>,
1592    ) {
1593        self.unfold_ranges(&[matches[index].clone()], false, true, cx);
1594        let range = self.range_for_match(&matches[index]);
1595        let autoscroll = if EditorSettings::get_global(cx).search.center_on_match {
1596            Autoscroll::center()
1597        } else {
1598            Autoscroll::fit()
1599        };
1600        self.change_selections(SelectionEffects::scroll(autoscroll), window, cx, |s| {
1601            s.select_ranges([range]);
1602        })
1603    }
1604
1605    fn select_matches(
1606        &mut self,
1607        matches: &[Self::Match],
1608        window: &mut Window,
1609        cx: &mut Context<Self>,
1610    ) {
1611        self.unfold_ranges(matches, false, false, cx);
1612        self.change_selections(SelectionEffects::no_scroll(), window, cx, |s| {
1613            s.select_ranges(matches.iter().cloned())
1614        });
1615    }
1616    fn replace(
1617        &mut self,
1618        identifier: &Self::Match,
1619        query: &SearchQuery,
1620        window: &mut Window,
1621        cx: &mut Context<Self>,
1622    ) {
1623        let text = self.buffer.read(cx);
1624        let text = text.snapshot(cx);
1625        let text = text.text_for_range(identifier.clone()).collect::<Vec<_>>();
1626        let text: Cow<_> = if text.len() == 1 {
1627            text.first().cloned().unwrap().into()
1628        } else {
1629            let joined_chunks = text.join("");
1630            joined_chunks.into()
1631        };
1632
1633        if let Some(replacement) = query.replacement_for(&text) {
1634            self.transact(window, cx, |this, _, cx| {
1635                this.edit([(identifier.clone(), Arc::from(&*replacement))], cx);
1636            });
1637        }
1638    }
1639    fn replace_all(
1640        &mut self,
1641        matches: &mut dyn Iterator<Item = &Self::Match>,
1642        query: &SearchQuery,
1643        window: &mut Window,
1644        cx: &mut Context<Self>,
1645    ) {
1646        let text = self.buffer.read(cx);
1647        let text = text.snapshot(cx);
1648        let mut edits = vec![];
1649
1650        // A regex might have replacement variables so we cannot apply
1651        // the same replacement to all matches
1652        if query.is_regex() {
1653            edits = matches
1654                .filter_map(|m| {
1655                    let text = text.text_for_range(m.clone()).collect::<Vec<_>>();
1656
1657                    let text: Cow<_> = if text.len() == 1 {
1658                        text.first().cloned().unwrap().into()
1659                    } else {
1660                        let joined_chunks = text.join("");
1661                        joined_chunks.into()
1662                    };
1663
1664                    query
1665                        .replacement_for(&text)
1666                        .map(|replacement| (m.clone(), Arc::from(&*replacement)))
1667                })
1668                .collect();
1669        } else if let Some(replacement) = query.replacement().map(Arc::<str>::from) {
1670            edits = matches.map(|m| (m.clone(), replacement.clone())).collect();
1671        }
1672
1673        if !edits.is_empty() {
1674            self.transact(window, cx, |this, _, cx| {
1675                this.edit(edits, cx);
1676            });
1677        }
1678    }
1679    fn match_index_for_direction(
1680        &mut self,
1681        matches: &[Range<Anchor>],
1682        current_index: usize,
1683        direction: Direction,
1684        count: usize,
1685        _: &mut Window,
1686        cx: &mut Context<Self>,
1687    ) -> usize {
1688        let buffer = self.buffer().read(cx).snapshot(cx);
1689        let current_index_position = if self.selections.disjoint_anchors_arc().len() == 1 {
1690            self.selections.newest_anchor().head()
1691        } else {
1692            matches[current_index].start
1693        };
1694
1695        let mut count = count % matches.len();
1696        if count == 0 {
1697            return current_index;
1698        }
1699        match direction {
1700            Direction::Next => {
1701                if matches[current_index]
1702                    .start
1703                    .cmp(&current_index_position, &buffer)
1704                    .is_gt()
1705                {
1706                    count -= 1
1707                }
1708
1709                (current_index + count) % matches.len()
1710            }
1711            Direction::Prev => {
1712                if matches[current_index]
1713                    .end
1714                    .cmp(&current_index_position, &buffer)
1715                    .is_lt()
1716                {
1717                    count -= 1;
1718                }
1719
1720                if current_index >= count {
1721                    current_index - count
1722                } else {
1723                    matches.len() - (count - current_index)
1724                }
1725            }
1726        }
1727    }
1728
1729    fn find_matches(
1730        &mut self,
1731        query: Arc<project::search::SearchQuery>,
1732        _: &mut Window,
1733        cx: &mut Context<Self>,
1734    ) -> Task<Vec<Range<Anchor>>> {
1735        let buffer = self.buffer().read(cx).snapshot(cx);
1736        let search_within_ranges = self
1737            .background_highlights
1738            .get(&HighlightKey::Type(TypeId::of::<SearchWithinRange>()))
1739            .map_or(vec![], |(_color, ranges)| {
1740                ranges.iter().cloned().collect::<Vec<_>>()
1741            });
1742
1743        cx.background_spawn(async move {
1744            let mut ranges = Vec::new();
1745
1746            let search_within_ranges = if search_within_ranges.is_empty() {
1747                vec![buffer.anchor_before(MultiBufferOffset(0))..buffer.anchor_after(buffer.len())]
1748            } else {
1749                search_within_ranges
1750            };
1751
1752            for range in search_within_ranges {
1753                for (search_buffer, search_range, excerpt_id, deleted_hunk_anchor) in
1754                    buffer.range_to_buffer_ranges_with_deleted_hunks(range)
1755                {
1756                    ranges.extend(
1757                        query
1758                            .search(
1759                                search_buffer,
1760                                Some(search_range.start.0..search_range.end.0),
1761                            )
1762                            .await
1763                            .into_iter()
1764                            .map(|match_range| {
1765                                if let Some(deleted_hunk_anchor) = deleted_hunk_anchor {
1766                                    let start = search_buffer
1767                                        .anchor_after(search_range.start + match_range.start);
1768                                    let end = search_buffer
1769                                        .anchor_before(search_range.start + match_range.end);
1770                                    deleted_hunk_anchor.with_diff_base_anchor(start)
1771                                        ..deleted_hunk_anchor.with_diff_base_anchor(end)
1772                                } else {
1773                                    let start = search_buffer
1774                                        .anchor_after(search_range.start + match_range.start);
1775                                    let end = search_buffer
1776                                        .anchor_before(search_range.start + match_range.end);
1777                                    Anchor::range_in_buffer(excerpt_id, start..end)
1778                                }
1779                            }),
1780                    );
1781                }
1782            }
1783
1784            ranges
1785        })
1786    }
1787
1788    fn active_match_index(
1789        &mut self,
1790        direction: Direction,
1791        matches: &[Range<Anchor>],
1792        _: &mut Window,
1793        cx: &mut Context<Self>,
1794    ) -> Option<usize> {
1795        active_match_index(
1796            direction,
1797            matches,
1798            &self.selections.newest_anchor().head(),
1799            &self.buffer().read(cx).snapshot(cx),
1800        )
1801    }
1802
1803    fn search_bar_visibility_changed(&mut self, _: bool, _: &mut Window, _: &mut Context<Self>) {
1804        self.expect_bounds_change = self.last_bounds;
1805    }
1806
1807    fn set_search_is_case_sensitive(
1808        &mut self,
1809        case_sensitive: Option<bool>,
1810        _cx: &mut Context<Self>,
1811    ) {
1812        self.select_next_is_case_sensitive = case_sensitive;
1813    }
1814}
1815
1816pub fn active_match_index(
1817    direction: Direction,
1818    ranges: &[Range<Anchor>],
1819    cursor: &Anchor,
1820    buffer: &MultiBufferSnapshot,
1821) -> Option<usize> {
1822    if ranges.is_empty() {
1823        None
1824    } else {
1825        let r = ranges.binary_search_by(|probe| {
1826            if probe.end.cmp(cursor, buffer).is_lt() {
1827                Ordering::Less
1828            } else if probe.start.cmp(cursor, buffer).is_gt() {
1829                Ordering::Greater
1830            } else {
1831                Ordering::Equal
1832            }
1833        });
1834        match direction {
1835            Direction::Prev => match r {
1836                Ok(i) => Some(i),
1837                Err(i) => Some(i.saturating_sub(1)),
1838            },
1839            Direction::Next => match r {
1840                Ok(i) | Err(i) => Some(cmp::min(i, ranges.len() - 1)),
1841            },
1842        }
1843    }
1844}
1845
1846pub fn entry_label_color(selected: bool) -> Color {
1847    if selected {
1848        Color::Default
1849    } else {
1850        Color::Muted
1851    }
1852}
1853
1854pub fn entry_diagnostic_aware_icon_name_and_color(
1855    diagnostic_severity: Option<DiagnosticSeverity>,
1856) -> Option<(IconName, Color)> {
1857    match diagnostic_severity {
1858        Some(DiagnosticSeverity::ERROR) => Some((IconName::Close, Color::Error)),
1859        Some(DiagnosticSeverity::WARNING) => Some((IconName::Triangle, Color::Warning)),
1860        _ => None,
1861    }
1862}
1863
1864pub fn entry_diagnostic_aware_icon_decoration_and_color(
1865    diagnostic_severity: Option<DiagnosticSeverity>,
1866) -> Option<(IconDecorationKind, Color)> {
1867    match diagnostic_severity {
1868        Some(DiagnosticSeverity::ERROR) => Some((IconDecorationKind::X, Color::Error)),
1869        Some(DiagnosticSeverity::WARNING) => Some((IconDecorationKind::Triangle, Color::Warning)),
1870        _ => None,
1871    }
1872}
1873
1874pub fn entry_git_aware_label_color(git_status: GitSummary, ignored: bool, selected: bool) -> Color {
1875    let tracked = git_status.index + git_status.worktree;
1876    if ignored {
1877        Color::Ignored
1878    } else if git_status.conflict > 0 {
1879        Color::Conflict
1880    } else if tracked.modified > 0 {
1881        Color::Modified
1882    } else if tracked.added > 0 || git_status.untracked > 0 {
1883        Color::Created
1884    } else {
1885        entry_label_color(selected)
1886    }
1887}
1888
1889fn path_for_buffer<'a>(
1890    buffer: &Entity<MultiBuffer>,
1891    height: usize,
1892    include_filename: bool,
1893    cx: &'a App,
1894) -> Option<Cow<'a, str>> {
1895    let file = buffer.read(cx).as_singleton()?.read(cx).file()?;
1896    path_for_file(file, height, include_filename, cx)
1897}
1898
1899fn path_for_file<'a>(
1900    file: &'a Arc<dyn language::File>,
1901    mut height: usize,
1902    include_filename: bool,
1903    cx: &'a App,
1904) -> Option<Cow<'a, str>> {
1905    if project::File::from_dyn(Some(file)).is_none() {
1906        return None;
1907    }
1908
1909    let file = file.as_ref();
1910    // Ensure we always render at least the filename.
1911    height += 1;
1912
1913    let mut prefix = file.path().as_ref();
1914    while height > 0 {
1915        if let Some(parent) = prefix.parent() {
1916            prefix = parent;
1917            height -= 1;
1918        } else {
1919            break;
1920        }
1921    }
1922
1923    // The full_path method allocates, so avoid calling it if height is zero.
1924    if height > 0 {
1925        let mut full_path = file.full_path(cx);
1926        if !include_filename {
1927            if !full_path.pop() {
1928                return None;
1929            }
1930        }
1931        Some(full_path.to_string_lossy().into_owned().into())
1932    } else {
1933        let mut path = file.path().strip_prefix(prefix).ok()?;
1934        if !include_filename {
1935            path = path.parent()?;
1936        }
1937        Some(path.display(file.path_style(cx)))
1938    }
1939}
1940
1941#[cfg(test)]
1942mod tests {
1943    use crate::editor_tests::init_test;
1944    use fs::Fs;
1945
1946    use super::*;
1947    use fs::MTime;
1948    use gpui::{App, VisualTestContext};
1949    use language::TestFile;
1950    use project::FakeFs;
1951    use std::path::{Path, PathBuf};
1952    use util::{path, rel_path::RelPath};
1953
1954    #[gpui::test]
1955    fn test_path_for_file(cx: &mut App) {
1956        let file: Arc<dyn language::File> = Arc::new(TestFile {
1957            path: RelPath::empty().into(),
1958            root_name: String::new(),
1959            local_root: None,
1960        });
1961        assert_eq!(path_for_file(&file, 0, false, cx), None);
1962    }
1963
1964    async fn deserialize_editor(
1965        item_id: ItemId,
1966        workspace_id: WorkspaceId,
1967        workspace: Entity<Workspace>,
1968        project: Entity<Project>,
1969        cx: &mut VisualTestContext,
1970    ) -> Entity<Editor> {
1971        workspace
1972            .update_in(cx, |workspace, window, cx| {
1973                let pane = workspace.active_pane();
1974                pane.update(cx, |_, cx| {
1975                    Editor::deserialize(
1976                        project.clone(),
1977                        workspace.weak_handle(),
1978                        workspace_id,
1979                        item_id,
1980                        window,
1981                        cx,
1982                    )
1983                })
1984            })
1985            .await
1986            .unwrap()
1987    }
1988
1989    #[gpui::test]
1990    async fn test_deserialize(cx: &mut gpui::TestAppContext) {
1991        init_test(cx, |_| {});
1992
1993        let fs = FakeFs::new(cx.executor());
1994        fs.insert_file(path!("/file.rs"), Default::default()).await;
1995
1996        // Test case 1: Deserialize with path and contents
1997        {
1998            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
1999            let (workspace, cx) =
2000                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2001            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2002            let item_id = 1234 as ItemId;
2003            let mtime = fs
2004                .metadata(Path::new(path!("/file.rs")))
2005                .await
2006                .unwrap()
2007                .unwrap()
2008                .mtime;
2009
2010            let serialized_editor = SerializedEditor {
2011                abs_path: Some(PathBuf::from(path!("/file.rs"))),
2012                contents: Some("fn main() {}".to_string()),
2013                language: Some("Rust".to_string()),
2014                mtime: Some(mtime),
2015            };
2016
2017            DB.save_serialized_editor(item_id, workspace_id, serialized_editor.clone())
2018                .await
2019                .unwrap();
2020
2021            let deserialized =
2022                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2023
2024            deserialized.update(cx, |editor, cx| {
2025                assert_eq!(editor.text(cx), "fn main() {}");
2026                assert!(editor.is_dirty(cx));
2027                assert!(!editor.has_conflict(cx));
2028                let buffer = editor.buffer().read(cx).as_singleton().unwrap().read(cx);
2029                assert!(buffer.file().is_some());
2030            });
2031        }
2032
2033        // Test case 2: Deserialize with only path
2034        {
2035            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
2036            let (workspace, cx) =
2037                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2038
2039            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2040
2041            let item_id = 5678 as ItemId;
2042            let serialized_editor = SerializedEditor {
2043                abs_path: Some(PathBuf::from(path!("/file.rs"))),
2044                contents: None,
2045                language: None,
2046                mtime: None,
2047            };
2048
2049            DB.save_serialized_editor(item_id, workspace_id, serialized_editor)
2050                .await
2051                .unwrap();
2052
2053            let deserialized =
2054                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2055
2056            deserialized.update(cx, |editor, cx| {
2057                assert_eq!(editor.text(cx), ""); // The file should be empty as per our initial setup
2058                assert!(!editor.is_dirty(cx));
2059                assert!(!editor.has_conflict(cx));
2060
2061                let buffer = editor.buffer().read(cx).as_singleton().unwrap().read(cx);
2062                assert!(buffer.file().is_some());
2063            });
2064        }
2065
2066        // Test case 3: Deserialize with no path (untitled buffer, with content and language)
2067        {
2068            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
2069            // Add Rust to the language, so that we can restore the language of the buffer
2070            project.read_with(cx, |project, _| {
2071                project.languages().add(languages::rust_lang())
2072            });
2073
2074            let (workspace, cx) =
2075                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2076
2077            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2078
2079            let item_id = 9012 as ItemId;
2080            let serialized_editor = SerializedEditor {
2081                abs_path: None,
2082                contents: Some("hello".to_string()),
2083                language: Some("Rust".to_string()),
2084                mtime: None,
2085            };
2086
2087            DB.save_serialized_editor(item_id, workspace_id, serialized_editor)
2088                .await
2089                .unwrap();
2090
2091            let deserialized =
2092                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2093
2094            deserialized.update(cx, |editor, cx| {
2095                assert_eq!(editor.text(cx), "hello");
2096                assert!(editor.is_dirty(cx)); // The editor should be dirty for an untitled buffer
2097
2098                let buffer = editor.buffer().read(cx).as_singleton().unwrap().read(cx);
2099                assert_eq!(
2100                    buffer.language().map(|lang| lang.name()),
2101                    Some("Rust".into())
2102                ); // Language should be set to Rust
2103                assert!(buffer.file().is_none()); // The buffer should not have an associated file
2104            });
2105        }
2106
2107        // Test case 4: Deserialize with path, content, and old mtime
2108        {
2109            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
2110            let (workspace, cx) =
2111                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2112
2113            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2114
2115            let item_id = 9345 as ItemId;
2116            let old_mtime = MTime::from_seconds_and_nanos(0, 50);
2117            let serialized_editor = SerializedEditor {
2118                abs_path: Some(PathBuf::from(path!("/file.rs"))),
2119                contents: Some("fn main() {}".to_string()),
2120                language: Some("Rust".to_string()),
2121                mtime: Some(old_mtime),
2122            };
2123
2124            DB.save_serialized_editor(item_id, workspace_id, serialized_editor)
2125                .await
2126                .unwrap();
2127
2128            let deserialized =
2129                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2130
2131            deserialized.update(cx, |editor, cx| {
2132                assert_eq!(editor.text(cx), "fn main() {}");
2133                assert!(editor.has_conflict(cx)); // The editor should have a conflict
2134            });
2135        }
2136
2137        // Test case 5: Deserialize with no path, no content, no language, and no old mtime (new, empty, unsaved buffer)
2138        {
2139            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
2140            let (workspace, cx) =
2141                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2142
2143            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2144
2145            let item_id = 10000 as ItemId;
2146            let serialized_editor = SerializedEditor {
2147                abs_path: None,
2148                contents: None,
2149                language: None,
2150                mtime: None,
2151            };
2152
2153            DB.save_serialized_editor(item_id, workspace_id, serialized_editor)
2154                .await
2155                .unwrap();
2156
2157            let deserialized =
2158                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2159
2160            deserialized.update(cx, |editor, cx| {
2161                assert_eq!(editor.text(cx), "");
2162                assert!(!editor.is_dirty(cx));
2163                assert!(!editor.has_conflict(cx));
2164
2165                let buffer = editor.buffer().read(cx).as_singleton().unwrap().read(cx);
2166                assert!(buffer.file().is_none());
2167            });
2168        }
2169    }
2170}