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