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, 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 suggested_filename(&self, cx: &App) -> SharedString {
 658        self.buffer.read(cx).title(cx).to_string().into()
 659    }
 660
 661    fn tab_icon(&self, _: &Window, cx: &App) -> Option<Icon> {
 662        ItemSettings::get_global(cx)
 663            .file_icons
 664            .then(|| {
 665                path_for_buffer(&self.buffer, 0, true, cx)
 666                    .and_then(|path| FileIcons::get_icon(path.as_ref(), cx))
 667            })
 668            .flatten()
 669            .map(Icon::from_path)
 670    }
 671
 672    fn tab_content(&self, params: TabContentParams, _: &Window, cx: &App) -> AnyElement {
 673        let label_color = if ItemSettings::get_global(cx).git_status {
 674            self.buffer()
 675                .read(cx)
 676                .as_singleton()
 677                .and_then(|buffer| {
 678                    let buffer = buffer.read(cx);
 679                    let path = buffer.project_path(cx)?;
 680                    let buffer_id = buffer.remote_id();
 681                    let project = self.project()?.read(cx);
 682                    let entry = project.entry_for_path(&path, cx)?;
 683                    let (repo, repo_path) = project
 684                        .git_store()
 685                        .read(cx)
 686                        .repository_and_path_for_buffer_id(buffer_id, cx)?;
 687                    let status = repo.read(cx).status_for_path(&repo_path)?.status;
 688
 689                    Some(entry_git_aware_label_color(
 690                        status.summary(),
 691                        entry.is_ignored,
 692                        params.selected,
 693                    ))
 694                })
 695                .unwrap_or_else(|| entry_label_color(params.selected))
 696        } else {
 697            entry_label_color(params.selected)
 698        };
 699
 700        let description = params.detail.and_then(|detail| {
 701            let path = path_for_buffer(&self.buffer, detail, false, cx)?;
 702            let description = path.to_string_lossy();
 703            let description = description.trim();
 704
 705            if description.is_empty() {
 706                return None;
 707            }
 708
 709            Some(util::truncate_and_trailoff(description, MAX_TAB_TITLE_LEN))
 710        });
 711
 712        // Whether the file was saved in the past but is now deleted.
 713        let was_deleted: bool = self
 714            .buffer()
 715            .read(cx)
 716            .as_singleton()
 717            .and_then(|buffer| buffer.read(cx).file())
 718            .map_or(false, |file| file.disk_state() == DiskState::Deleted);
 719
 720        h_flex()
 721            .gap_2()
 722            .child(
 723                Label::new(self.title(cx).to_string())
 724                    .color(label_color)
 725                    .when(params.preview, |this| this.italic())
 726                    .when(was_deleted, |this| this.strikethrough()),
 727            )
 728            .when_some(description, |this, description| {
 729                this.child(
 730                    Label::new(description)
 731                        .size(LabelSize::XSmall)
 732                        .color(Color::Muted),
 733                )
 734            })
 735            .into_any_element()
 736    }
 737
 738    fn for_each_project_item(
 739        &self,
 740        cx: &App,
 741        f: &mut dyn FnMut(EntityId, &dyn project::ProjectItem),
 742    ) {
 743        self.buffer
 744            .read(cx)
 745            .for_each_buffer(|buffer| f(buffer.entity_id(), buffer.read(cx)));
 746    }
 747
 748    fn is_singleton(&self, cx: &App) -> bool {
 749        self.buffer.read(cx).is_singleton()
 750    }
 751
 752    fn can_save_as(&self, cx: &App) -> bool {
 753        self.buffer.read(cx).is_singleton()
 754    }
 755
 756    fn clone_on_split(
 757        &self,
 758        _workspace_id: Option<WorkspaceId>,
 759        window: &mut Window,
 760        cx: &mut Context<Self>,
 761    ) -> Option<Entity<Editor>>
 762    where
 763        Self: Sized,
 764    {
 765        Some(cx.new(|cx| self.clone(window, cx)))
 766    }
 767
 768    fn set_nav_history(
 769        &mut self,
 770        history: ItemNavHistory,
 771        _window: &mut Window,
 772        _: &mut Context<Self>,
 773    ) {
 774        self.nav_history = Some(history);
 775    }
 776
 777    fn discarded(&self, _project: Entity<Project>, _: &mut Window, cx: &mut Context<Self>) {
 778        for buffer in self.buffer().clone().read(cx).all_buffers() {
 779            buffer.update(cx, |buffer, cx| buffer.discarded(cx))
 780        }
 781    }
 782
 783    fn on_removed(&self, cx: &App) {
 784        self.report_editor_event(ReportEditorEvent::Closed, None, cx);
 785    }
 786
 787    fn deactivated(&mut self, _: &mut Window, cx: &mut Context<Self>) {
 788        let selection = self.selections.newest_anchor();
 789        self.push_to_nav_history(selection.head(), None, true, false, cx);
 790    }
 791
 792    fn workspace_deactivated(&mut self, _: &mut Window, cx: &mut Context<Self>) {
 793        self.hide_hovered_link(cx);
 794    }
 795
 796    fn is_dirty(&self, cx: &App) -> bool {
 797        self.buffer().read(cx).read(cx).is_dirty()
 798    }
 799
 800    fn has_deleted_file(&self, cx: &App) -> bool {
 801        self.buffer().read(cx).read(cx).has_deleted_file()
 802    }
 803
 804    fn has_conflict(&self, cx: &App) -> bool {
 805        self.buffer().read(cx).read(cx).has_conflict()
 806    }
 807
 808    fn can_save(&self, cx: &App) -> bool {
 809        let buffer = &self.buffer().read(cx);
 810        if let Some(buffer) = buffer.as_singleton() {
 811            buffer.read(cx).project_path(cx).is_some()
 812        } else {
 813            true
 814        }
 815    }
 816
 817    fn save(
 818        &mut self,
 819        options: SaveOptions,
 820        project: Entity<Project>,
 821        window: &mut Window,
 822        cx: &mut Context<Self>,
 823    ) -> Task<Result<()>> {
 824        // Add meta data tracking # of auto saves
 825        if options.autosave {
 826            self.report_editor_event(ReportEditorEvent::Saved { auto_saved: true }, None, cx);
 827        } else {
 828            self.report_editor_event(ReportEditorEvent::Saved { auto_saved: false }, None, cx);
 829        }
 830
 831        let buffers = self.buffer().clone().read(cx).all_buffers();
 832        let buffers = buffers
 833            .into_iter()
 834            .map(|handle| handle.read(cx).base_buffer().unwrap_or(handle.clone()))
 835            .collect::<HashSet<_>>();
 836
 837        // let mut buffers_to_save =
 838        let buffers_to_save = if self.buffer.read(cx).is_singleton() && !options.autosave {
 839            buffers.clone()
 840        } else {
 841            buffers
 842                .iter()
 843                .filter(|buffer| buffer.read(cx).is_dirty())
 844                .cloned()
 845                .collect()
 846        };
 847
 848        cx.spawn_in(window, async move |this, cx| {
 849            if options.format {
 850                this.update_in(cx, |editor, window, cx| {
 851                    editor.perform_format(
 852                        project.clone(),
 853                        FormatTrigger::Save,
 854                        FormatTarget::Buffers(buffers_to_save.clone()),
 855                        window,
 856                        cx,
 857                    )
 858                })?
 859                .await?;
 860            }
 861
 862            if !buffers_to_save.is_empty() {
 863                project
 864                    .update(cx, |project, cx| {
 865                        project.save_buffers(buffers_to_save.clone(), cx)
 866                    })?
 867                    .await?;
 868            }
 869
 870            // Notify about clean buffers for language server events
 871            let buffers_that_were_not_saved: Vec<_> = buffers
 872                .into_iter()
 873                .filter(|b| !buffers_to_save.contains(b))
 874                .collect();
 875
 876            for buffer in buffers_that_were_not_saved {
 877                buffer
 878                    .update(cx, |buffer, cx| {
 879                        let version = buffer.saved_version().clone();
 880                        let mtime = buffer.saved_mtime();
 881                        buffer.did_save(version, mtime, cx);
 882                    })
 883                    .ok();
 884            }
 885
 886            Ok(())
 887        })
 888    }
 889
 890    fn save_as(
 891        &mut self,
 892        project: Entity<Project>,
 893        path: ProjectPath,
 894        _: &mut Window,
 895        cx: &mut Context<Self>,
 896    ) -> Task<Result<()>> {
 897        let buffer = self
 898            .buffer()
 899            .read(cx)
 900            .as_singleton()
 901            .expect("cannot call save_as on an excerpt list");
 902
 903        let file_extension = path
 904            .path
 905            .extension()
 906            .map(|a| a.to_string_lossy().to_string());
 907        self.report_editor_event(
 908            ReportEditorEvent::Saved { auto_saved: false },
 909            file_extension,
 910            cx,
 911        );
 912
 913        project.update(cx, |project, cx| project.save_buffer_as(buffer, path, cx))
 914    }
 915
 916    fn reload(
 917        &mut self,
 918        project: Entity<Project>,
 919        window: &mut Window,
 920        cx: &mut Context<Self>,
 921    ) -> Task<Result<()>> {
 922        let buffer = self.buffer().clone();
 923        let buffers = self.buffer.read(cx).all_buffers();
 924        let reload_buffers =
 925            project.update(cx, |project, cx| project.reload_buffers(buffers, true, cx));
 926        cx.spawn_in(window, async move |this, cx| {
 927            let transaction = reload_buffers.log_err().await;
 928            this.update(cx, |editor, cx| {
 929                editor.request_autoscroll(Autoscroll::fit(), cx)
 930            })?;
 931            buffer
 932                .update(cx, |buffer, cx| {
 933                    if let Some(transaction) = transaction {
 934                        if !buffer.is_singleton() {
 935                            buffer.push_transaction(&transaction.0, cx);
 936                        }
 937                    }
 938                })
 939                .ok();
 940            Ok(())
 941        })
 942    }
 943
 944    fn as_searchable(&self, handle: &Entity<Self>) -> Option<Box<dyn SearchableItemHandle>> {
 945        Some(Box::new(handle.clone()))
 946    }
 947
 948    fn pixel_position_of_cursor(&self, _: &App) -> Option<gpui::Point<Pixels>> {
 949        self.pixel_position_of_newest_cursor
 950    }
 951
 952    fn breadcrumb_location(&self, _: &App) -> ToolbarItemLocation {
 953        if self.show_breadcrumbs {
 954            ToolbarItemLocation::PrimaryLeft
 955        } else {
 956            ToolbarItemLocation::Hidden
 957        }
 958    }
 959
 960    fn breadcrumbs(&self, variant: &Theme, cx: &App) -> Option<Vec<BreadcrumbText>> {
 961        let cursor = self.selections.newest_anchor().head();
 962        let multibuffer = &self.buffer().read(cx);
 963        let (buffer_id, symbols) =
 964            multibuffer.symbols_containing(cursor, Some(variant.syntax()), cx)?;
 965        let buffer = multibuffer.buffer(buffer_id)?;
 966
 967        let buffer = buffer.read(cx);
 968        let text = self.breadcrumb_header.clone().unwrap_or_else(|| {
 969            buffer
 970                .snapshot()
 971                .resolve_file_path(
 972                    cx,
 973                    self.project
 974                        .as_ref()
 975                        .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
 976                        .unwrap_or_default(),
 977                )
 978                .map(|path| path.to_string_lossy().to_string())
 979                .unwrap_or_else(|| {
 980                    if multibuffer.is_singleton() {
 981                        multibuffer.title(cx).to_string()
 982                    } else {
 983                        "untitled".to_string()
 984                    }
 985                })
 986        });
 987
 988        let settings = ThemeSettings::get_global(cx);
 989
 990        let mut breadcrumbs = vec![BreadcrumbText {
 991            text,
 992            highlights: None,
 993            font: Some(settings.buffer_font.clone()),
 994        }];
 995
 996        breadcrumbs.extend(symbols.into_iter().map(|symbol| BreadcrumbText {
 997            text: symbol.text,
 998            highlights: Some(symbol.highlight_ranges),
 999            font: Some(settings.buffer_font.clone()),
1000        }));
1001        Some(breadcrumbs)
1002    }
1003
1004    fn added_to_workspace(
1005        &mut self,
1006        workspace: &mut Workspace,
1007        _window: &mut Window,
1008        cx: &mut Context<Self>,
1009    ) {
1010        self.workspace = Some((workspace.weak_handle(), workspace.database_id()));
1011        if let Some(workspace) = &workspace.weak_handle().upgrade() {
1012            cx.subscribe(
1013                &workspace,
1014                |editor, _, event: &workspace::Event, _cx| match event {
1015                    workspace::Event::ModalOpened => {
1016                        editor.mouse_context_menu.take();
1017                        editor.inline_blame_popover.take();
1018                    }
1019                    _ => {}
1020                },
1021            )
1022            .detach();
1023        }
1024    }
1025
1026    fn to_item_events(event: &EditorEvent, mut f: impl FnMut(ItemEvent)) {
1027        match event {
1028            EditorEvent::Closed => f(ItemEvent::CloseItem),
1029
1030            EditorEvent::Saved | EditorEvent::TitleChanged => {
1031                f(ItemEvent::UpdateTab);
1032                f(ItemEvent::UpdateBreadcrumbs);
1033            }
1034
1035            EditorEvent::Reparsed(_) => {
1036                f(ItemEvent::UpdateBreadcrumbs);
1037            }
1038
1039            EditorEvent::SelectionsChanged { local } if *local => {
1040                f(ItemEvent::UpdateBreadcrumbs);
1041            }
1042
1043            EditorEvent::BreadcrumbsChanged => {
1044                f(ItemEvent::UpdateBreadcrumbs);
1045            }
1046
1047            EditorEvent::DirtyChanged => {
1048                f(ItemEvent::UpdateTab);
1049            }
1050
1051            EditorEvent::BufferEdited => {
1052                f(ItemEvent::Edit);
1053                f(ItemEvent::UpdateBreadcrumbs);
1054            }
1055
1056            EditorEvent::ExcerptsAdded { .. } | EditorEvent::ExcerptsRemoved { .. } => {
1057                f(ItemEvent::Edit);
1058            }
1059
1060            _ => {}
1061        }
1062    }
1063
1064    fn preserve_preview(&self, cx: &App) -> bool {
1065        self.buffer.read(cx).preserve_preview(cx)
1066    }
1067}
1068
1069impl SerializableItem for Editor {
1070    fn serialized_item_kind() -> &'static str {
1071        "Editor"
1072    }
1073
1074    fn cleanup(
1075        workspace_id: WorkspaceId,
1076        alive_items: Vec<ItemId>,
1077        _window: &mut Window,
1078        cx: &mut App,
1079    ) -> Task<Result<()>> {
1080        workspace::delete_unloaded_items(alive_items, workspace_id, "editors", &DB, cx)
1081    }
1082
1083    fn deserialize(
1084        project: Entity<Project>,
1085        workspace: WeakEntity<Workspace>,
1086        workspace_id: workspace::WorkspaceId,
1087        item_id: ItemId,
1088        window: &mut Window,
1089        cx: &mut App,
1090    ) -> Task<Result<Entity<Self>>> {
1091        let serialized_editor = match DB
1092            .get_serialized_editor(item_id, workspace_id)
1093            .context("Failed to query editor state")
1094        {
1095            Ok(Some(serialized_editor)) => {
1096                if ProjectSettings::get_global(cx)
1097                    .session
1098                    .restore_unsaved_buffers
1099                {
1100                    serialized_editor
1101                } else {
1102                    SerializedEditor {
1103                        abs_path: serialized_editor.abs_path,
1104                        contents: None,
1105                        language: None,
1106                        mtime: None,
1107                    }
1108                }
1109            }
1110            Ok(None) => {
1111                return Task::ready(Err(anyhow!("No path or contents found for buffer")));
1112            }
1113            Err(error) => {
1114                return Task::ready(Err(error));
1115            }
1116        };
1117
1118        match serialized_editor {
1119            SerializedEditor {
1120                abs_path: None,
1121                contents: Some(contents),
1122                language,
1123                ..
1124            } => window.spawn(cx, {
1125                let project = project.clone();
1126                async move |cx| {
1127                    let language_registry =
1128                        project.read_with(cx, |project, _| project.languages().clone())?;
1129
1130                    let language = if let Some(language_name) = language {
1131                        // We don't fail here, because we'd rather not set the language if the name changed
1132                        // than fail to restore the buffer.
1133                        language_registry
1134                            .language_for_name(&language_name)
1135                            .await
1136                            .ok()
1137                    } else {
1138                        None
1139                    };
1140
1141                    // First create the empty buffer
1142                    let buffer = project
1143                        .update(cx, |project, cx| project.create_buffer(cx))?
1144                        .await?;
1145
1146                    // Then set the text so that the dirty bit is set correctly
1147                    buffer.update(cx, |buffer, cx| {
1148                        buffer.set_language_registry(language_registry);
1149                        if let Some(language) = language {
1150                            buffer.set_language(Some(language), cx);
1151                        }
1152                        buffer.set_text(contents, cx);
1153                        if let Some(entry) = buffer.peek_undo_stack() {
1154                            buffer.forget_transaction(entry.transaction_id());
1155                        }
1156                    })?;
1157
1158                    cx.update(|window, cx| {
1159                        cx.new(|cx| {
1160                            let mut editor = Editor::for_buffer(buffer, Some(project), window, cx);
1161
1162                            editor.read_metadata_from_db(item_id, workspace_id, window, cx);
1163                            editor
1164                        })
1165                    })
1166                }
1167            }),
1168            SerializedEditor {
1169                abs_path: Some(abs_path),
1170                contents,
1171                mtime,
1172                ..
1173            } => {
1174                let opened_buffer = project.update(cx, |project, cx| {
1175                    let (worktree, path) = project.find_worktree(&abs_path, cx)?;
1176                    let project_path = ProjectPath {
1177                        worktree_id: worktree.read(cx).id(),
1178                        path: path.into(),
1179                    };
1180                    Some(project.open_path(project_path, cx))
1181                });
1182
1183                match opened_buffer {
1184                    Some(opened_buffer) => {
1185                        window.spawn(cx, async move |cx| {
1186                            let (_, buffer) = opened_buffer.await?;
1187
1188                            // This is a bit wasteful: we're loading the whole buffer from
1189                            // disk and then overwrite the content.
1190                            // But for now, it keeps the implementation of the content serialization
1191                            // simple, because we don't have to persist all of the metadata that we get
1192                            // by loading the file (git diff base, ...).
1193                            if let Some(buffer_text) = contents {
1194                                buffer.update(cx, |buffer, cx| {
1195                                    // If we did restore an mtime, we want to store it on the buffer
1196                                    // so that the next edit will mark the buffer as dirty/conflicted.
1197                                    if mtime.is_some() {
1198                                        buffer.did_reload(
1199                                            buffer.version(),
1200                                            buffer.line_ending(),
1201                                            mtime,
1202                                            cx,
1203                                        );
1204                                    }
1205                                    buffer.set_text(buffer_text, cx);
1206                                    if let Some(entry) = buffer.peek_undo_stack() {
1207                                        buffer.forget_transaction(entry.transaction_id());
1208                                    }
1209                                })?;
1210                            }
1211
1212                            cx.update(|window, cx| {
1213                                cx.new(|cx| {
1214                                    let mut editor =
1215                                        Editor::for_buffer(buffer, Some(project), window, cx);
1216
1217                                    editor.read_metadata_from_db(item_id, workspace_id, window, cx);
1218                                    editor
1219                                })
1220                            })
1221                        })
1222                    }
1223                    None => {
1224                        let open_by_abs_path = workspace.update(cx, |workspace, cx| {
1225                            workspace.open_abs_path(
1226                                abs_path.clone(),
1227                                OpenOptions {
1228                                    visible: Some(OpenVisible::None),
1229                                    ..Default::default()
1230                                },
1231                                window,
1232                                cx,
1233                            )
1234                        });
1235                        window.spawn(cx, async move |cx| {
1236                            let editor = open_by_abs_path?.await?.downcast::<Editor>().with_context(|| format!("Failed to downcast to Editor after opening abs path {abs_path:?}"))?;
1237                            editor.update_in(cx, |editor, window, cx| {
1238                                editor.read_metadata_from_db(item_id, workspace_id, window, cx);
1239                            })?;
1240                            Ok(editor)
1241                        })
1242                    }
1243                }
1244            }
1245            SerializedEditor {
1246                abs_path: None,
1247                contents: None,
1248                ..
1249            } => window.spawn(cx, async move |cx| {
1250                let buffer = project
1251                    .update(cx, |project, cx| project.create_buffer(cx))?
1252                    .await?;
1253
1254                cx.update(|window, cx| {
1255                    cx.new(|cx| {
1256                        let mut editor = Editor::for_buffer(buffer, Some(project), window, cx);
1257
1258                        editor.read_metadata_from_db(item_id, workspace_id, window, cx);
1259                        editor
1260                    })
1261                })
1262            }),
1263        }
1264    }
1265
1266    fn serialize(
1267        &mut self,
1268        workspace: &mut Workspace,
1269        item_id: ItemId,
1270        closing: bool,
1271        window: &mut Window,
1272        cx: &mut Context<Self>,
1273    ) -> Option<Task<Result<()>>> {
1274        if self.mode.is_minimap() {
1275            return None;
1276        }
1277        let mut serialize_dirty_buffers = self.serialize_dirty_buffers;
1278
1279        let project = self.project.clone()?;
1280        if project.read(cx).visible_worktrees(cx).next().is_none() {
1281            // If we don't have a worktree, we don't serialize, because
1282            // projects without worktrees aren't deserialized.
1283            serialize_dirty_buffers = false;
1284        }
1285
1286        if closing && !serialize_dirty_buffers {
1287            return None;
1288        }
1289
1290        let workspace_id = workspace.database_id()?;
1291
1292        let buffer = self.buffer().read(cx).as_singleton()?;
1293
1294        let abs_path = buffer.read(cx).file().and_then(|file| {
1295            let worktree_id = file.worktree_id(cx);
1296            project
1297                .read(cx)
1298                .worktree_for_id(worktree_id, cx)
1299                .and_then(|worktree| worktree.read(cx).absolutize(&file.path()).ok())
1300                .or_else(|| {
1301                    let full_path = file.full_path(cx);
1302                    let project_path = project.read(cx).find_project_path(&full_path, cx)?;
1303                    project.read(cx).absolute_path(&project_path, cx)
1304                })
1305        });
1306
1307        let is_dirty = buffer.read(cx).is_dirty();
1308        let mtime = buffer.read(cx).saved_mtime();
1309
1310        let snapshot = buffer.read(cx).snapshot();
1311
1312        Some(cx.spawn_in(window, async move |_this, cx| {
1313            cx.background_spawn(async move {
1314                let (contents, language) = if serialize_dirty_buffers && is_dirty {
1315                    let contents = snapshot.text();
1316                    let language = snapshot.language().map(|lang| lang.name().to_string());
1317                    (Some(contents), language)
1318                } else {
1319                    (None, None)
1320                };
1321
1322                let editor = SerializedEditor {
1323                    abs_path,
1324                    contents,
1325                    language,
1326                    mtime,
1327                };
1328                log::debug!("Serializing editor {item_id:?} in workspace {workspace_id:?}");
1329                DB.save_serialized_editor(item_id, workspace_id, editor)
1330                    .await
1331                    .context("failed to save serialized editor")
1332            })
1333            .await
1334            .context("failed to save contents of buffer")?;
1335
1336            Ok(())
1337        }))
1338    }
1339
1340    fn should_serialize(&self, event: &Self::Event) -> bool {
1341        matches!(
1342            event,
1343            EditorEvent::Saved | EditorEvent::DirtyChanged | EditorEvent::BufferEdited
1344        )
1345    }
1346}
1347
1348#[derive(Debug, Default)]
1349struct EditorRestorationData {
1350    entries: HashMap<PathBuf, RestorationData>,
1351}
1352
1353#[derive(Default, Debug)]
1354pub struct RestorationData {
1355    pub scroll_position: (BufferRow, gpui::Point<f32>),
1356    pub folds: Vec<Range<Point>>,
1357    pub selections: Vec<Range<Point>>,
1358}
1359
1360impl ProjectItem for Editor {
1361    type Item = Buffer;
1362
1363    fn project_item_kind() -> Option<ProjectItemKind> {
1364        Some(ProjectItemKind("Editor"))
1365    }
1366
1367    fn for_project_item(
1368        project: Entity<Project>,
1369        pane: Option<&Pane>,
1370        buffer: Entity<Buffer>,
1371        window: &mut Window,
1372        cx: &mut Context<Self>,
1373    ) -> Self {
1374        let mut editor = Self::for_buffer(buffer.clone(), Some(project), window, cx);
1375        if let Some((excerpt_id, buffer_id, snapshot)) =
1376            editor.buffer().read(cx).snapshot(cx).as_singleton()
1377        {
1378            if WorkspaceSettings::get(None, cx).restore_on_file_reopen {
1379                if let Some(restoration_data) = Self::project_item_kind()
1380                    .and_then(|kind| pane.as_ref()?.project_item_restoration_data.get(&kind))
1381                    .and_then(|data| data.downcast_ref::<EditorRestorationData>())
1382                    .and_then(|data| {
1383                        let file = project::File::from_dyn(buffer.read(cx).file())?;
1384                        data.entries.get(&file.abs_path(cx))
1385                    })
1386                {
1387                    editor.fold_ranges(
1388                        clip_ranges(&restoration_data.folds, &snapshot),
1389                        false,
1390                        window,
1391                        cx,
1392                    );
1393                    if !restoration_data.selections.is_empty() {
1394                        editor.change_selections(SelectionEffects::no_scroll(), window, cx, |s| {
1395                            s.select_ranges(clip_ranges(&restoration_data.selections, &snapshot));
1396                        });
1397                    }
1398                    let (top_row, offset) = restoration_data.scroll_position;
1399                    let anchor = Anchor::in_buffer(
1400                        *excerpt_id,
1401                        buffer_id,
1402                        snapshot.anchor_before(Point::new(top_row, 0)),
1403                    );
1404                    editor.set_scroll_anchor(ScrollAnchor { anchor, offset }, window, cx);
1405                }
1406            }
1407        }
1408
1409        editor
1410    }
1411}
1412
1413fn clip_ranges<'a>(
1414    original: impl IntoIterator<Item = &'a Range<Point>> + 'a,
1415    snapshot: &'a BufferSnapshot,
1416) -> Vec<Range<Point>> {
1417    original
1418        .into_iter()
1419        .map(|range| {
1420            snapshot.clip_point(range.start, Bias::Left)
1421                ..snapshot.clip_point(range.end, Bias::Right)
1422        })
1423        .collect()
1424}
1425
1426impl EventEmitter<SearchEvent> for Editor {}
1427
1428impl Editor {
1429    pub fn update_restoration_data(
1430        &self,
1431        cx: &mut Context<Self>,
1432        write: impl for<'a> FnOnce(&'a mut RestorationData) + 'static,
1433    ) {
1434        if self.mode.is_minimap() || !WorkspaceSettings::get(None, cx).restore_on_file_reopen {
1435            return;
1436        }
1437
1438        let editor = cx.entity();
1439        cx.defer(move |cx| {
1440            editor.update(cx, |editor, cx| {
1441                let kind = Editor::project_item_kind()?;
1442                let pane = editor.workspace()?.read(cx).pane_for(&cx.entity())?;
1443                let buffer = editor.buffer().read(cx).as_singleton()?;
1444                let file_abs_path = project::File::from_dyn(buffer.read(cx).file())?.abs_path(cx);
1445                pane.update(cx, |pane, _| {
1446                    let data = pane
1447                        .project_item_restoration_data
1448                        .entry(kind)
1449                        .or_insert_with(|| Box::new(EditorRestorationData::default()) as Box<_>);
1450                    let data = match data.downcast_mut::<EditorRestorationData>() {
1451                        Some(data) => data,
1452                        None => {
1453                            *data = Box::new(EditorRestorationData::default());
1454                            data.downcast_mut::<EditorRestorationData>()
1455                                .expect("just written the type downcasted to")
1456                        }
1457                    };
1458
1459                    let data = data.entries.entry(file_abs_path).or_default();
1460                    write(data);
1461                    Some(())
1462                })
1463            });
1464        });
1465    }
1466}
1467
1468pub(crate) enum BufferSearchHighlights {}
1469impl SearchableItem for Editor {
1470    type Match = Range<Anchor>;
1471
1472    fn get_matches(&self, _window: &mut Window, _: &mut App) -> Vec<Range<Anchor>> {
1473        self.background_highlights
1474            .get(&HighlightKey::Type(TypeId::of::<BufferSearchHighlights>()))
1475            .map_or(Vec::new(), |(_color, ranges)| {
1476                ranges.iter().cloned().collect()
1477            })
1478    }
1479
1480    fn clear_matches(&mut self, _: &mut Window, cx: &mut Context<Self>) {
1481        if self
1482            .clear_background_highlights::<BufferSearchHighlights>(cx)
1483            .is_some()
1484        {
1485            cx.emit(SearchEvent::MatchesInvalidated);
1486        }
1487    }
1488
1489    fn update_matches(
1490        &mut self,
1491        matches: &[Range<Anchor>],
1492        _: &mut Window,
1493        cx: &mut Context<Self>,
1494    ) {
1495        let existing_range = self
1496            .background_highlights
1497            .get(&HighlightKey::Type(TypeId::of::<BufferSearchHighlights>()))
1498            .map(|(_, range)| range.as_ref());
1499        let updated = existing_range != Some(matches);
1500        self.highlight_background::<BufferSearchHighlights>(
1501            matches,
1502            |theme| theme.colors().search_match_background,
1503            cx,
1504        );
1505        if updated {
1506            cx.emit(SearchEvent::MatchesInvalidated);
1507        }
1508    }
1509
1510    fn has_filtered_search_ranges(&mut self) -> bool {
1511        self.has_background_highlights::<SearchWithinRange>()
1512    }
1513
1514    fn toggle_filtered_search_ranges(
1515        &mut self,
1516        enabled: bool,
1517        _: &mut Window,
1518        cx: &mut Context<Self>,
1519    ) {
1520        if self.has_filtered_search_ranges() {
1521            self.previous_search_ranges = self
1522                .clear_background_highlights::<SearchWithinRange>(cx)
1523                .map(|(_, ranges)| ranges)
1524        }
1525
1526        if !enabled {
1527            return;
1528        }
1529
1530        let ranges = self.selections.disjoint_anchor_ranges().collect::<Vec<_>>();
1531        if ranges.iter().any(|s| s.start != s.end) {
1532            self.set_search_within_ranges(&ranges, cx);
1533        } else if let Some(previous_search_ranges) = self.previous_search_ranges.take() {
1534            self.set_search_within_ranges(&previous_search_ranges, cx)
1535        }
1536    }
1537
1538    fn supported_options(&self) -> SearchOptions {
1539        if self.in_project_search {
1540            SearchOptions {
1541                case: true,
1542                word: true,
1543                regex: true,
1544                replacement: false,
1545                selection: false,
1546                find_in_results: true,
1547            }
1548        } else {
1549            SearchOptions {
1550                case: true,
1551                word: true,
1552                regex: true,
1553                replacement: true,
1554                selection: true,
1555                find_in_results: false,
1556            }
1557        }
1558    }
1559
1560    fn query_suggestion(&mut self, window: &mut Window, cx: &mut Context<Self>) -> String {
1561        let setting = EditorSettings::get_global(cx).seed_search_query_from_cursor;
1562        let snapshot = &self.snapshot(window, cx).buffer_snapshot;
1563        let selection = self.selections.newest_adjusted(cx);
1564
1565        match setting {
1566            SeedQuerySetting::Never => String::new(),
1567            SeedQuerySetting::Selection | SeedQuerySetting::Always if !selection.is_empty() => {
1568                let text: String = snapshot
1569                    .text_for_range(selection.start..selection.end)
1570                    .collect();
1571                if text.contains('\n') {
1572                    String::new()
1573                } else {
1574                    text
1575                }
1576            }
1577            SeedQuerySetting::Selection => String::new(),
1578            SeedQuerySetting::Always => {
1579                let (range, kind) = snapshot.surrounding_word(selection.start, true);
1580                if kind == Some(CharKind::Word) {
1581                    let text: String = snapshot.text_for_range(range).collect();
1582                    if !text.trim().is_empty() {
1583                        return text;
1584                    }
1585                }
1586                String::new()
1587            }
1588        }
1589    }
1590
1591    fn activate_match(
1592        &mut self,
1593        index: usize,
1594        matches: &[Range<Anchor>],
1595        window: &mut Window,
1596        cx: &mut Context<Self>,
1597    ) {
1598        self.unfold_ranges(&[matches[index].clone()], false, true, cx);
1599        let range = self.range_for_match(&matches[index]);
1600        self.change_selections(Default::default(), window, cx, |s| {
1601            s.select_ranges([range]);
1602        })
1603    }
1604
1605    fn select_matches(
1606        &mut self,
1607        matches: &[Self::Match],
1608        window: &mut Window,
1609        cx: &mut Context<Self>,
1610    ) {
1611        self.unfold_ranges(matches, false, false, cx);
1612        self.change_selections(SelectionEffects::no_scroll(), window, cx, |s| {
1613            s.select_ranges(matches.iter().cloned())
1614        });
1615    }
1616    fn replace(
1617        &mut self,
1618        identifier: &Self::Match,
1619        query: &SearchQuery,
1620        window: &mut Window,
1621        cx: &mut Context<Self>,
1622    ) {
1623        let text = self.buffer.read(cx);
1624        let text = text.snapshot(cx);
1625        let text = text.text_for_range(identifier.clone()).collect::<Vec<_>>();
1626        let text: Cow<_> = if text.len() == 1 {
1627            text.first().cloned().unwrap().into()
1628        } else {
1629            let joined_chunks = text.join("");
1630            joined_chunks.into()
1631        };
1632
1633        if let Some(replacement) = query.replacement_for(&text) {
1634            self.transact(window, cx, |this, _, cx| {
1635                this.edit([(identifier.clone(), Arc::from(&*replacement))], cx);
1636            });
1637        }
1638    }
1639    fn replace_all(
1640        &mut self,
1641        matches: &mut dyn Iterator<Item = &Self::Match>,
1642        query: &SearchQuery,
1643        window: &mut Window,
1644        cx: &mut Context<Self>,
1645    ) {
1646        let text = self.buffer.read(cx);
1647        let text = text.snapshot(cx);
1648        let mut edits = vec![];
1649
1650        for m in matches {
1651            let text = text.text_for_range(m.clone()).collect::<Vec<_>>();
1652
1653            let text: Cow<_> = if text.len() == 1 {
1654                text.first().cloned().unwrap().into()
1655            } else {
1656                let joined_chunks = text.join("");
1657                joined_chunks.into()
1658            };
1659
1660            if let Some(replacement) = query.replacement_for(&text) {
1661                edits.push((m.clone(), Arc::from(&*replacement)));
1662            }
1663        }
1664
1665        if !edits.is_empty() {
1666            self.transact(window, cx, |this, _, cx| {
1667                this.edit(edits, cx);
1668            });
1669        }
1670    }
1671    fn match_index_for_direction(
1672        &mut self,
1673        matches: &[Range<Anchor>],
1674        current_index: usize,
1675        direction: Direction,
1676        count: usize,
1677        _: &mut Window,
1678        cx: &mut Context<Self>,
1679    ) -> usize {
1680        let buffer = self.buffer().read(cx).snapshot(cx);
1681        let current_index_position = if self.selections.disjoint_anchors().len() == 1 {
1682            self.selections.newest_anchor().head()
1683        } else {
1684            matches[current_index].start
1685        };
1686
1687        let mut count = count % matches.len();
1688        if count == 0 {
1689            return current_index;
1690        }
1691        match direction {
1692            Direction::Next => {
1693                if matches[current_index]
1694                    .start
1695                    .cmp(&current_index_position, &buffer)
1696                    .is_gt()
1697                {
1698                    count -= 1
1699                }
1700
1701                (current_index + count) % matches.len()
1702            }
1703            Direction::Prev => {
1704                if matches[current_index]
1705                    .end
1706                    .cmp(&current_index_position, &buffer)
1707                    .is_lt()
1708                {
1709                    count -= 1;
1710                }
1711
1712                if current_index >= count {
1713                    current_index - count
1714                } else {
1715                    matches.len() - (count - current_index)
1716                }
1717            }
1718        }
1719    }
1720
1721    fn find_matches(
1722        &mut self,
1723        query: Arc<project::search::SearchQuery>,
1724        _: &mut Window,
1725        cx: &mut Context<Self>,
1726    ) -> Task<Vec<Range<Anchor>>> {
1727        let buffer = self.buffer().read(cx).snapshot(cx);
1728        let search_within_ranges = self
1729            .background_highlights
1730            .get(&HighlightKey::Type(TypeId::of::<SearchWithinRange>()))
1731            .map_or(vec![], |(_color, ranges)| {
1732                ranges.iter().cloned().collect::<Vec<_>>()
1733            });
1734
1735        cx.background_spawn(async move {
1736            let mut ranges = Vec::new();
1737
1738            let search_within_ranges = if search_within_ranges.is_empty() {
1739                vec![buffer.anchor_before(0)..buffer.anchor_after(buffer.len())]
1740            } else {
1741                search_within_ranges
1742            };
1743
1744            for range in search_within_ranges {
1745                for (search_buffer, search_range, excerpt_id, deleted_hunk_anchor) in
1746                    buffer.range_to_buffer_ranges_with_deleted_hunks(range)
1747                {
1748                    ranges.extend(
1749                        query
1750                            .search(search_buffer, Some(search_range.clone()))
1751                            .await
1752                            .into_iter()
1753                            .map(|match_range| {
1754                                if let Some(deleted_hunk_anchor) = deleted_hunk_anchor {
1755                                    let start = search_buffer
1756                                        .anchor_after(search_range.start + match_range.start);
1757                                    let end = search_buffer
1758                                        .anchor_before(search_range.start + match_range.end);
1759                                    Anchor {
1760                                        diff_base_anchor: Some(start),
1761                                        ..deleted_hunk_anchor
1762                                    }..Anchor {
1763                                        diff_base_anchor: Some(end),
1764                                        ..deleted_hunk_anchor
1765                                    }
1766                                } else {
1767                                    let start = search_buffer
1768                                        .anchor_after(search_range.start + match_range.start);
1769                                    let end = search_buffer
1770                                        .anchor_before(search_range.start + match_range.end);
1771                                    Anchor::range_in_buffer(
1772                                        excerpt_id,
1773                                        search_buffer.remote_id(),
1774                                        start..end,
1775                                    )
1776                                }
1777                            }),
1778                    );
1779                }
1780            }
1781
1782            ranges
1783        })
1784    }
1785
1786    fn active_match_index(
1787        &mut self,
1788        direction: Direction,
1789        matches: &[Range<Anchor>],
1790        _: &mut Window,
1791        cx: &mut Context<Self>,
1792    ) -> Option<usize> {
1793        active_match_index(
1794            direction,
1795            matches,
1796            &self.selections.newest_anchor().head(),
1797            &self.buffer().read(cx).snapshot(cx),
1798        )
1799    }
1800
1801    fn search_bar_visibility_changed(&mut self, _: bool, _: &mut Window, _: &mut Context<Self>) {
1802        self.expect_bounds_change = self.last_bounds;
1803    }
1804}
1805
1806pub fn active_match_index(
1807    direction: Direction,
1808    ranges: &[Range<Anchor>],
1809    cursor: &Anchor,
1810    buffer: &MultiBufferSnapshot,
1811) -> Option<usize> {
1812    if ranges.is_empty() {
1813        None
1814    } else {
1815        let r = ranges.binary_search_by(|probe| {
1816            if probe.end.cmp(cursor, buffer).is_lt() {
1817                Ordering::Less
1818            } else if probe.start.cmp(cursor, buffer).is_gt() {
1819                Ordering::Greater
1820            } else {
1821                Ordering::Equal
1822            }
1823        });
1824        match direction {
1825            Direction::Prev => match r {
1826                Ok(i) => Some(i),
1827                Err(i) => Some(i.saturating_sub(1)),
1828            },
1829            Direction::Next => match r {
1830                Ok(i) | Err(i) => Some(cmp::min(i, ranges.len() - 1)),
1831            },
1832        }
1833    }
1834}
1835
1836pub fn entry_label_color(selected: bool) -> Color {
1837    if selected {
1838        Color::Default
1839    } else {
1840        Color::Muted
1841    }
1842}
1843
1844pub fn entry_diagnostic_aware_icon_name_and_color(
1845    diagnostic_severity: Option<DiagnosticSeverity>,
1846) -> Option<(IconName, Color)> {
1847    match diagnostic_severity {
1848        Some(DiagnosticSeverity::ERROR) => Some((IconName::Close, Color::Error)),
1849        Some(DiagnosticSeverity::WARNING) => Some((IconName::Triangle, Color::Warning)),
1850        _ => None,
1851    }
1852}
1853
1854pub fn entry_diagnostic_aware_icon_decoration_and_color(
1855    diagnostic_severity: Option<DiagnosticSeverity>,
1856) -> Option<(IconDecorationKind, Color)> {
1857    match diagnostic_severity {
1858        Some(DiagnosticSeverity::ERROR) => Some((IconDecorationKind::X, Color::Error)),
1859        Some(DiagnosticSeverity::WARNING) => Some((IconDecorationKind::Triangle, Color::Warning)),
1860        _ => None,
1861    }
1862}
1863
1864pub fn entry_git_aware_label_color(git_status: GitSummary, ignored: bool, selected: bool) -> Color {
1865    let tracked = git_status.index + git_status.worktree;
1866    if ignored {
1867        Color::Ignored
1868    } else if git_status.conflict > 0 {
1869        Color::Conflict
1870    } else if tracked.modified > 0 {
1871        Color::Modified
1872    } else if tracked.added > 0 || git_status.untracked > 0 {
1873        Color::Created
1874    } else {
1875        entry_label_color(selected)
1876    }
1877}
1878
1879fn path_for_buffer<'a>(
1880    buffer: &Entity<MultiBuffer>,
1881    height: usize,
1882    include_filename: bool,
1883    cx: &'a App,
1884) -> Option<Cow<'a, Path>> {
1885    let file = buffer.read(cx).as_singleton()?.read(cx).file()?;
1886    path_for_file(file.as_ref(), height, include_filename, cx)
1887}
1888
1889fn path_for_file<'a>(
1890    file: &'a dyn language::File,
1891    mut height: usize,
1892    include_filename: bool,
1893    cx: &'a App,
1894) -> Option<Cow<'a, Path>> {
1895    // Ensure we always render at least the filename.
1896    height += 1;
1897
1898    let mut prefix = file.path().as_ref();
1899    while height > 0 {
1900        if let Some(parent) = prefix.parent() {
1901            prefix = parent;
1902            height -= 1;
1903        } else {
1904            break;
1905        }
1906    }
1907
1908    // Here we could have just always used `full_path`, but that is very
1909    // allocation-heavy and so we try to use a `Cow<Path>` if we haven't
1910    // traversed all the way up to the worktree's root.
1911    if height > 0 {
1912        let full_path = file.full_path(cx);
1913        if include_filename {
1914            Some(full_path.into())
1915        } else {
1916            Some(full_path.parent()?.to_path_buf().into())
1917        }
1918    } else {
1919        let mut path = file.path().strip_prefix(prefix).ok()?;
1920        if !include_filename {
1921            path = path.parent()?;
1922        }
1923        Some(path.into())
1924    }
1925}
1926
1927#[cfg(test)]
1928mod tests {
1929    use crate::editor_tests::init_test;
1930    use fs::Fs;
1931
1932    use super::*;
1933    use fs::MTime;
1934    use gpui::{App, VisualTestContext};
1935    use language::{LanguageMatcher, TestFile};
1936    use project::FakeFs;
1937    use std::path::{Path, PathBuf};
1938    use util::path;
1939
1940    #[gpui::test]
1941    fn test_path_for_file(cx: &mut App) {
1942        let file = TestFile {
1943            path: Path::new("").into(),
1944            root_name: String::new(),
1945            local_root: None,
1946        };
1947        assert_eq!(path_for_file(&file, 0, false, cx), None);
1948    }
1949
1950    async fn deserialize_editor(
1951        item_id: ItemId,
1952        workspace_id: WorkspaceId,
1953        workspace: Entity<Workspace>,
1954        project: Entity<Project>,
1955        cx: &mut VisualTestContext,
1956    ) -> Entity<Editor> {
1957        workspace
1958            .update_in(cx, |workspace, window, cx| {
1959                let pane = workspace.active_pane();
1960                pane.update(cx, |_, cx| {
1961                    Editor::deserialize(
1962                        project.clone(),
1963                        workspace.weak_handle(),
1964                        workspace_id,
1965                        item_id,
1966                        window,
1967                        cx,
1968                    )
1969                })
1970            })
1971            .await
1972            .unwrap()
1973    }
1974
1975    fn rust_language() -> Arc<language::Language> {
1976        Arc::new(language::Language::new(
1977            language::LanguageConfig {
1978                name: "Rust".into(),
1979                matcher: LanguageMatcher {
1980                    path_suffixes: vec!["rs".to_string()],
1981                    ..Default::default()
1982                },
1983                ..Default::default()
1984            },
1985            Some(tree_sitter_rust::LANGUAGE.into()),
1986        ))
1987    }
1988
1989    #[gpui::test]
1990    async fn test_deserialize(cx: &mut gpui::TestAppContext) {
1991        init_test(cx, |_| {});
1992
1993        let fs = FakeFs::new(cx.executor());
1994        fs.insert_file(path!("/file.rs"), Default::default()).await;
1995
1996        // Test case 1: Deserialize with path and contents
1997        {
1998            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
1999            let (workspace, cx) =
2000                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2001            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2002            let item_id = 1234 as ItemId;
2003            let mtime = fs
2004                .metadata(Path::new(path!("/file.rs")))
2005                .await
2006                .unwrap()
2007                .unwrap()
2008                .mtime;
2009
2010            let serialized_editor = SerializedEditor {
2011                abs_path: Some(PathBuf::from(path!("/file.rs"))),
2012                contents: Some("fn main() {}".to_string()),
2013                language: Some("Rust".to_string()),
2014                mtime: Some(mtime),
2015            };
2016
2017            DB.save_serialized_editor(item_id, workspace_id, serialized_editor.clone())
2018                .await
2019                .unwrap();
2020
2021            let deserialized =
2022                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2023
2024            deserialized.update(cx, |editor, cx| {
2025                assert_eq!(editor.text(cx), "fn main() {}");
2026                assert!(editor.is_dirty(cx));
2027                assert!(!editor.has_conflict(cx));
2028                let buffer = editor.buffer().read(cx).as_singleton().unwrap().read(cx);
2029                assert!(buffer.file().is_some());
2030            });
2031        }
2032
2033        // Test case 2: Deserialize with only path
2034        {
2035            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
2036            let (workspace, cx) =
2037                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2038
2039            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2040
2041            let item_id = 5678 as ItemId;
2042            let serialized_editor = SerializedEditor {
2043                abs_path: Some(PathBuf::from(path!("/file.rs"))),
2044                contents: None,
2045                language: None,
2046                mtime: None,
2047            };
2048
2049            DB.save_serialized_editor(item_id, workspace_id, serialized_editor)
2050                .await
2051                .unwrap();
2052
2053            let deserialized =
2054                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2055
2056            deserialized.update(cx, |editor, cx| {
2057                assert_eq!(editor.text(cx), ""); // The file should be empty as per our initial setup
2058                assert!(!editor.is_dirty(cx));
2059                assert!(!editor.has_conflict(cx));
2060
2061                let buffer = editor.buffer().read(cx).as_singleton().unwrap().read(cx);
2062                assert!(buffer.file().is_some());
2063            });
2064        }
2065
2066        // Test case 3: Deserialize with no path (untitled buffer, with content and language)
2067        {
2068            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
2069            // Add Rust to the language, so that we can restore the language of the buffer
2070            project.read_with(cx, |project, _| project.languages().add(rust_language()));
2071
2072            let (workspace, cx) =
2073                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2074
2075            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2076
2077            let item_id = 9012 as ItemId;
2078            let serialized_editor = SerializedEditor {
2079                abs_path: None,
2080                contents: Some("hello".to_string()),
2081                language: Some("Rust".to_string()),
2082                mtime: None,
2083            };
2084
2085            DB.save_serialized_editor(item_id, workspace_id, serialized_editor)
2086                .await
2087                .unwrap();
2088
2089            let deserialized =
2090                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2091
2092            deserialized.update(cx, |editor, cx| {
2093                assert_eq!(editor.text(cx), "hello");
2094                assert!(editor.is_dirty(cx)); // The editor should be dirty for an untitled buffer
2095
2096                let buffer = editor.buffer().read(cx).as_singleton().unwrap().read(cx);
2097                assert_eq!(
2098                    buffer.language().map(|lang| lang.name()),
2099                    Some("Rust".into())
2100                ); // Language should be set to Rust
2101                assert!(buffer.file().is_none()); // The buffer should not have an associated file
2102            });
2103        }
2104
2105        // Test case 4: Deserialize with path, content, and old mtime
2106        {
2107            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
2108            let (workspace, cx) =
2109                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2110
2111            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2112
2113            let item_id = 9345 as ItemId;
2114            let old_mtime = MTime::from_seconds_and_nanos(0, 50);
2115            let serialized_editor = SerializedEditor {
2116                abs_path: Some(PathBuf::from(path!("/file.rs"))),
2117                contents: Some("fn main() {}".to_string()),
2118                language: Some("Rust".to_string()),
2119                mtime: Some(old_mtime),
2120            };
2121
2122            DB.save_serialized_editor(item_id, workspace_id, serialized_editor)
2123                .await
2124                .unwrap();
2125
2126            let deserialized =
2127                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2128
2129            deserialized.update(cx, |editor, cx| {
2130                assert_eq!(editor.text(cx), "fn main() {}");
2131                assert!(editor.has_conflict(cx)); // The editor should have a conflict
2132            });
2133        }
2134
2135        // Test case 5: Deserialize with no path, no content, no language, and no old mtime (new, empty, unsaved buffer)
2136        {
2137            let project = Project::test(fs.clone(), [path!("/file.rs").as_ref()], cx).await;
2138            let (workspace, cx) =
2139                cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2140
2141            let workspace_id = workspace::WORKSPACE_DB.next_id().await.unwrap();
2142
2143            let item_id = 10000 as ItemId;
2144            let serialized_editor = SerializedEditor {
2145                abs_path: None,
2146                contents: None,
2147                language: None,
2148                mtime: None,
2149            };
2150
2151            DB.save_serialized_editor(item_id, workspace_id, serialized_editor)
2152                .await
2153                .unwrap();
2154
2155            let deserialized =
2156                deserialize_editor(item_id, workspace_id, workspace, project, cx).await;
2157
2158            deserialized.update(cx, |editor, cx| {
2159                assert_eq!(editor.text(cx), "");
2160                assert!(!editor.is_dirty(cx));
2161                assert!(!editor.has_conflict(cx));
2162
2163                let buffer = editor.buffer().read(cx).as_singleton().unwrap().read(cx);
2164                assert!(buffer.file().is_none());
2165            });
2166        }
2167    }
2168}