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