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