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