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