project_diff.rs

   1use crate::{
   2    conflict_view::ConflictAddon,
   3    git_panel::{GitPanel, GitPanelAddon, GitStatusEntry},
   4    git_panel_settings::GitPanelSettings,
   5    remote_button::{render_publish_button, render_push_button},
   6};
   7use anyhow::Result;
   8use buffer_diff::{BufferDiff, DiffHunkSecondaryStatus};
   9use collections::HashSet;
  10use editor::{
  11    Editor, EditorEvent, SelectionEffects,
  12    actions::{GoToHunk, GoToPreviousHunk},
  13    multibuffer_context_lines,
  14    scroll::Autoscroll,
  15};
  16use futures::StreamExt;
  17use git::{
  18    Commit, StageAll, StageAndNext, ToggleStaged, UnstageAll, UnstageAndNext,
  19    repository::{Branch, RepoPath, Upstream, UpstreamTracking, UpstreamTrackingStatus},
  20    status::FileStatus,
  21};
  22use gpui::{
  23    Action, AnyElement, AnyView, App, AppContext as _, AsyncWindowContext, Entity, EventEmitter,
  24    FocusHandle, Focusable, Render, Subscription, Task, WeakEntity, actions,
  25};
  26use language::{Anchor, Buffer, Capability, OffsetRangeExt};
  27use multi_buffer::{MultiBuffer, PathKey};
  28use project::{
  29    Project, ProjectPath,
  30    git_store::{GitStore, GitStoreEvent, Repository},
  31};
  32use settings::{Settings, SettingsStore};
  33use std::any::{Any, TypeId};
  34use std::ops::Range;
  35use theme::ActiveTheme;
  36use ui::{KeyBinding, Tooltip, prelude::*, vertical_divider};
  37use util::ResultExt as _;
  38use workspace::{
  39    CloseActiveItem, ItemNavHistory, SerializableItem, ToolbarItemEvent, ToolbarItemLocation,
  40    ToolbarItemView, Workspace,
  41    item::{BreadcrumbText, Item, ItemEvent, ItemHandle, SaveOptions, TabContentParams},
  42    searchable::SearchableItemHandle,
  43};
  44
  45actions!(
  46    git,
  47    [
  48        /// Shows the diff between the working directory and the index.
  49        Diff,
  50        /// Adds files to the git staging area.
  51        Add
  52    ]
  53);
  54
  55pub struct ProjectDiff {
  56    project: Entity<Project>,
  57    multibuffer: Entity<MultiBuffer>,
  58    editor: Entity<Editor>,
  59    git_store: Entity<GitStore>,
  60    workspace: WeakEntity<Workspace>,
  61    focus_handle: FocusHandle,
  62    update_needed: postage::watch::Sender<()>,
  63    pending_scroll: Option<PathKey>,
  64    _task: Task<Result<()>>,
  65    _subscription: Subscription,
  66}
  67
  68#[derive(Debug)]
  69struct DiffBuffer {
  70    path_key: PathKey,
  71    buffer: Entity<Buffer>,
  72    diff: Entity<BufferDiff>,
  73    file_status: FileStatus,
  74}
  75
  76const CONFLICT_SORT_PREFIX: u64 = 1;
  77const TRACKED_SORT_PREFIX: u64 = 2;
  78const NEW_SORT_PREFIX: u64 = 3;
  79
  80impl ProjectDiff {
  81    pub(crate) fn register(workspace: &mut Workspace, cx: &mut Context<Workspace>) {
  82        workspace.register_action(Self::deploy);
  83        workspace.register_action(|workspace, _: &Add, window, cx| {
  84            Self::deploy(workspace, &Diff, window, cx);
  85        });
  86        workspace::register_serializable_item::<ProjectDiff>(cx);
  87    }
  88
  89    fn deploy(
  90        workspace: &mut Workspace,
  91        _: &Diff,
  92        window: &mut Window,
  93        cx: &mut Context<Workspace>,
  94    ) {
  95        Self::deploy_at(workspace, None, window, cx)
  96    }
  97
  98    pub fn deploy_at(
  99        workspace: &mut Workspace,
 100        entry: Option<GitStatusEntry>,
 101        window: &mut Window,
 102        cx: &mut Context<Workspace>,
 103    ) {
 104        telemetry::event!(
 105            "Git Diff Opened",
 106            source = if entry.is_some() {
 107                "Git Panel"
 108            } else {
 109                "Action"
 110            }
 111        );
 112        let project_diff = if let Some(existing) = workspace.item_of_type::<Self>(cx) {
 113            workspace.activate_item(&existing, true, true, window, cx);
 114            existing
 115        } else {
 116            let workspace_handle = cx.entity();
 117            let project_diff =
 118                cx.new(|cx| Self::new(workspace.project().clone(), workspace_handle, window, cx));
 119            workspace.add_item_to_active_pane(
 120                Box::new(project_diff.clone()),
 121                None,
 122                true,
 123                window,
 124                cx,
 125            );
 126            project_diff
 127        };
 128        if let Some(entry) = entry {
 129            project_diff.update(cx, |project_diff, cx| {
 130                project_diff.move_to_entry(entry, window, cx);
 131            })
 132        }
 133    }
 134
 135    pub fn autoscroll(&self, cx: &mut Context<Self>) {
 136        self.editor.update(cx, |editor, cx| {
 137            editor.request_autoscroll(Autoscroll::fit(), cx);
 138        })
 139    }
 140
 141    fn new(
 142        project: Entity<Project>,
 143        workspace: Entity<Workspace>,
 144        window: &mut Window,
 145        cx: &mut Context<Self>,
 146    ) -> Self {
 147        let focus_handle = cx.focus_handle();
 148        let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
 149
 150        let editor = cx.new(|cx| {
 151            let mut diff_display_editor =
 152                Editor::for_multibuffer(multibuffer.clone(), Some(project.clone()), window, cx);
 153            diff_display_editor.disable_diagnostics(cx);
 154            diff_display_editor.set_expand_all_diff_hunks(cx);
 155            diff_display_editor.register_addon(GitPanelAddon {
 156                workspace: workspace.downgrade(),
 157            });
 158            diff_display_editor
 159        });
 160        window.defer(cx, {
 161            let workspace = workspace.clone();
 162            let editor = editor.clone();
 163            move |window, cx| {
 164                workspace.update(cx, |workspace, cx| {
 165                    editor.update(cx, |editor, cx| {
 166                        editor.added_to_workspace(workspace, window, cx);
 167                    })
 168                });
 169            }
 170        });
 171        cx.subscribe_in(&editor, window, Self::handle_editor_event)
 172            .detach();
 173
 174        let git_store = project.read(cx).git_store().clone();
 175        let git_store_subscription = cx.subscribe_in(
 176            &git_store,
 177            window,
 178            move |this, _git_store, event, _window, _cx| match event {
 179                GitStoreEvent::ActiveRepositoryChanged(_)
 180                | GitStoreEvent::RepositoryUpdated(_, _, true)
 181                | GitStoreEvent::ConflictsUpdated => {
 182                    *this.update_needed.borrow_mut() = ();
 183                }
 184                _ => {}
 185            },
 186        );
 187
 188        let mut was_sort_by_path = GitPanelSettings::get_global(cx).sort_by_path;
 189        let mut was_collapse_untracked_diff =
 190            GitPanelSettings::get_global(cx).collapse_untracked_diff;
 191        cx.observe_global::<SettingsStore>(move |this, cx| {
 192            let is_sort_by_path = GitPanelSettings::get_global(cx).sort_by_path;
 193            let is_collapse_untracked_diff =
 194                GitPanelSettings::get_global(cx).collapse_untracked_diff;
 195            if is_sort_by_path != was_sort_by_path
 196                || is_collapse_untracked_diff != was_collapse_untracked_diff
 197            {
 198                *this.update_needed.borrow_mut() = ();
 199            }
 200            was_sort_by_path = is_sort_by_path;
 201            was_collapse_untracked_diff = is_collapse_untracked_diff;
 202        })
 203        .detach();
 204
 205        let (mut send, recv) = postage::watch::channel::<()>();
 206        let worker = window.spawn(cx, {
 207            let this = cx.weak_entity();
 208            async |cx| Self::handle_status_updates(this, recv, cx).await
 209        });
 210        // Kick off a refresh immediately
 211        *send.borrow_mut() = ();
 212
 213        Self {
 214            project,
 215            git_store: git_store.clone(),
 216            workspace: workspace.downgrade(),
 217            focus_handle,
 218            editor,
 219            multibuffer,
 220            pending_scroll: None,
 221            update_needed: send,
 222            _task: worker,
 223            _subscription: git_store_subscription,
 224        }
 225    }
 226
 227    pub fn move_to_entry(
 228        &mut self,
 229        entry: GitStatusEntry,
 230        window: &mut Window,
 231        cx: &mut Context<Self>,
 232    ) {
 233        let Some(git_repo) = self.git_store.read(cx).active_repository() else {
 234            return;
 235        };
 236        let repo = git_repo.read(cx);
 237        let sort_prefix = sort_prefix(repo, &entry.repo_path, entry.status, cx);
 238        let path_key = PathKey::with_sort_prefix(sort_prefix, entry.repo_path.0);
 239
 240        self.move_to_path(path_key, window, cx)
 241    }
 242
 243    pub fn active_path(&self, cx: &App) -> Option<ProjectPath> {
 244        let editor = self.editor.read(cx);
 245        let position = editor.selections.newest_anchor().head();
 246        let multi_buffer = editor.buffer().read(cx);
 247        let (_, buffer, _) = multi_buffer.excerpt_containing(position, cx)?;
 248
 249        let file = buffer.read(cx).file()?;
 250        Some(ProjectPath {
 251            worktree_id: file.worktree_id(cx),
 252            path: file.path().clone(),
 253        })
 254    }
 255
 256    fn move_to_path(&mut self, path_key: PathKey, window: &mut Window, cx: &mut Context<Self>) {
 257        if let Some(position) = self.multibuffer.read(cx).location_for_path(&path_key, cx) {
 258            self.editor.update(cx, |editor, cx| {
 259                editor.change_selections(
 260                    SelectionEffects::scroll(Autoscroll::focused()),
 261                    window,
 262                    cx,
 263                    |s| {
 264                        s.select_ranges([position..position]);
 265                    },
 266                )
 267            });
 268        } else {
 269            self.pending_scroll = Some(path_key);
 270        }
 271    }
 272
 273    fn button_states(&self, cx: &App) -> ButtonStates {
 274        let editor = self.editor.read(cx);
 275        let snapshot = self.multibuffer.read(cx).snapshot(cx);
 276        let prev_next = snapshot.diff_hunks().nth(1).is_some();
 277        let mut selection = true;
 278
 279        let mut ranges = editor
 280            .selections
 281            .disjoint_anchor_ranges()
 282            .collect::<Vec<_>>();
 283        if !ranges.iter().any(|range| range.start != range.end) {
 284            selection = false;
 285            if let Some((excerpt_id, buffer, range)) = self.editor.read(cx).active_excerpt(cx) {
 286                ranges = vec![multi_buffer::Anchor::range_in_buffer(
 287                    excerpt_id,
 288                    buffer.read(cx).remote_id(),
 289                    range,
 290                )];
 291            } else {
 292                ranges = Vec::default();
 293            }
 294        }
 295        let mut has_staged_hunks = false;
 296        let mut has_unstaged_hunks = false;
 297        for hunk in editor.diff_hunks_in_ranges(&ranges, &snapshot) {
 298            match hunk.secondary_status {
 299                DiffHunkSecondaryStatus::HasSecondaryHunk
 300                | DiffHunkSecondaryStatus::SecondaryHunkAdditionPending => {
 301                    has_unstaged_hunks = true;
 302                }
 303                DiffHunkSecondaryStatus::OverlapsWithSecondaryHunk => {
 304                    has_staged_hunks = true;
 305                    has_unstaged_hunks = true;
 306                }
 307                DiffHunkSecondaryStatus::NoSecondaryHunk
 308                | DiffHunkSecondaryStatus::SecondaryHunkRemovalPending => {
 309                    has_staged_hunks = true;
 310                }
 311            }
 312        }
 313        let mut stage_all = false;
 314        let mut unstage_all = false;
 315        self.workspace
 316            .read_with(cx, |workspace, cx| {
 317                if let Some(git_panel) = workspace.panel::<GitPanel>(cx) {
 318                    let git_panel = git_panel.read(cx);
 319                    stage_all = git_panel.can_stage_all();
 320                    unstage_all = git_panel.can_unstage_all();
 321                }
 322            })
 323            .ok();
 324
 325        ButtonStates {
 326            stage: has_unstaged_hunks,
 327            unstage: has_staged_hunks,
 328            prev_next,
 329            selection,
 330            stage_all,
 331            unstage_all,
 332        }
 333    }
 334
 335    fn handle_editor_event(
 336        &mut self,
 337        editor: &Entity<Editor>,
 338        event: &EditorEvent,
 339        window: &mut Window,
 340        cx: &mut Context<Self>,
 341    ) {
 342        if let EditorEvent::SelectionsChanged { local: true } = event {
 343            let Some(project_path) = self.active_path(cx) else {
 344                return;
 345            };
 346            self.workspace
 347                .update(cx, |workspace, cx| {
 348                    if let Some(git_panel) = workspace.panel::<GitPanel>(cx) {
 349                        git_panel.update(cx, |git_panel, cx| {
 350                            git_panel.select_entry_by_path(project_path, window, cx)
 351                        })
 352                    }
 353                })
 354                .ok();
 355        }
 356        if editor.focus_handle(cx).contains_focused(window, cx)
 357            && self.multibuffer.read(cx).is_empty()
 358        {
 359            self.focus_handle.focus(window)
 360        }
 361    }
 362
 363    fn load_buffers(&mut self, cx: &mut Context<Self>) -> Vec<Task<Result<DiffBuffer>>> {
 364        let Some(repo) = self.git_store.read(cx).active_repository() else {
 365            self.multibuffer.update(cx, |multibuffer, cx| {
 366                multibuffer.clear(cx);
 367            });
 368            return vec![];
 369        };
 370
 371        let mut previous_paths = self.multibuffer.read(cx).paths().collect::<HashSet<_>>();
 372
 373        let mut result = vec![];
 374        repo.update(cx, |repo, cx| {
 375            for entry in repo.cached_status() {
 376                if !entry.status.has_changes() {
 377                    continue;
 378                }
 379                let Some(project_path) = repo.repo_path_to_project_path(&entry.repo_path, cx)
 380                else {
 381                    continue;
 382                };
 383                let sort_prefix = sort_prefix(repo, &entry.repo_path, entry.status, cx);
 384                let path_key = PathKey::with_sort_prefix(sort_prefix, entry.repo_path.0.clone());
 385
 386                previous_paths.remove(&path_key);
 387                let load_buffer = self
 388                    .project
 389                    .update(cx, |project, cx| project.open_buffer(project_path, cx));
 390
 391                let project = self.project.clone();
 392                result.push(cx.spawn(async move |_, cx| {
 393                    let buffer = load_buffer.await?;
 394                    let changes = project
 395                        .update(cx, |project, cx| {
 396                            project.open_uncommitted_diff(buffer.clone(), cx)
 397                        })?
 398                        .await?;
 399                    Ok(DiffBuffer {
 400                        path_key,
 401                        buffer,
 402                        diff: changes,
 403                        file_status: entry.status,
 404                    })
 405                }));
 406            }
 407        });
 408        self.multibuffer.update(cx, |multibuffer, cx| {
 409            for path in previous_paths {
 410                multibuffer.remove_excerpts_for_path(path, cx);
 411            }
 412        });
 413        result
 414    }
 415
 416    fn register_buffer(
 417        &mut self,
 418        diff_buffer: DiffBuffer,
 419        window: &mut Window,
 420        cx: &mut Context<Self>,
 421    ) {
 422        let path_key = diff_buffer.path_key;
 423        let buffer = diff_buffer.buffer;
 424        let diff = diff_buffer.diff;
 425
 426        let conflict_addon = self
 427            .editor
 428            .read(cx)
 429            .addon::<ConflictAddon>()
 430            .expect("project diff editor should have a conflict addon");
 431
 432        let snapshot = buffer.read(cx).snapshot();
 433        let diff = diff.read(cx);
 434        let diff_hunk_ranges = diff
 435            .hunks_intersecting_range(Anchor::MIN..Anchor::MAX, &snapshot, cx)
 436            .map(|diff_hunk| diff_hunk.buffer_range);
 437        let conflicts = conflict_addon
 438            .conflict_set(snapshot.remote_id())
 439            .map(|conflict_set| conflict_set.read(cx).snapshot().conflicts)
 440            .unwrap_or_default();
 441        let conflicts = conflicts.iter().map(|conflict| conflict.range.clone());
 442
 443        let excerpt_ranges = merge_anchor_ranges(diff_hunk_ranges, conflicts, &snapshot)
 444            .map(|range| range.to_point(&snapshot))
 445            .collect::<Vec<_>>();
 446
 447        let (was_empty, is_excerpt_newly_added) = self.multibuffer.update(cx, |multibuffer, cx| {
 448            let was_empty = multibuffer.is_empty();
 449            let (_, is_newly_added) = multibuffer.set_excerpts_for_path(
 450                path_key.clone(),
 451                buffer,
 452                excerpt_ranges,
 453                multibuffer_context_lines(cx),
 454                cx,
 455            );
 456            (was_empty, is_newly_added)
 457        });
 458
 459        self.editor.update(cx, |editor, cx| {
 460            if was_empty {
 461                editor.change_selections(SelectionEffects::no_scroll(), window, cx, |selections| {
 462                    // TODO select the very beginning (possibly inside a deletion)
 463                    selections.select_ranges([0..0])
 464                });
 465            }
 466            if is_excerpt_newly_added
 467                && (diff_buffer.file_status.is_deleted()
 468                    || (diff_buffer.file_status.is_untracked()
 469                        && GitPanelSettings::get_global(cx).collapse_untracked_diff))
 470            {
 471                editor.fold_buffer(snapshot.text.remote_id(), cx)
 472            }
 473        });
 474
 475        if self.multibuffer.read(cx).is_empty()
 476            && self
 477                .editor
 478                .read(cx)
 479                .focus_handle(cx)
 480                .contains_focused(window, cx)
 481        {
 482            self.focus_handle.focus(window);
 483        } else if self.focus_handle.is_focused(window) && !self.multibuffer.read(cx).is_empty() {
 484            self.editor.update(cx, |editor, cx| {
 485                editor.focus_handle(cx).focus(window);
 486            });
 487        }
 488        if self.pending_scroll.as_ref() == Some(&path_key) {
 489            self.move_to_path(path_key, window, cx);
 490        }
 491    }
 492
 493    pub async fn handle_status_updates(
 494        this: WeakEntity<Self>,
 495        mut recv: postage::watch::Receiver<()>,
 496        cx: &mut AsyncWindowContext,
 497    ) -> Result<()> {
 498        while (recv.next().await).is_some() {
 499            let buffers_to_load = this.update(cx, |this, cx| this.load_buffers(cx))?;
 500            for buffer_to_load in buffers_to_load {
 501                if let Some(buffer) = buffer_to_load.await.log_err() {
 502                    cx.update(|window, cx| {
 503                        this.update(cx, |this, cx| this.register_buffer(buffer, window, cx))
 504                            .ok();
 505                    })?;
 506                }
 507            }
 508            this.update(cx, |this, cx| {
 509                this.pending_scroll.take();
 510                cx.notify();
 511            })?;
 512        }
 513
 514        Ok(())
 515    }
 516
 517    #[cfg(any(test, feature = "test-support"))]
 518    pub fn excerpt_paths(&self, cx: &App) -> Vec<std::sync::Arc<util::rel_path::RelPath>> {
 519        self.multibuffer
 520            .read(cx)
 521            .excerpt_paths()
 522            .map(|key| key.path())
 523            .cloned()
 524            .collect()
 525    }
 526}
 527
 528fn sort_prefix(repo: &Repository, repo_path: &RepoPath, status: FileStatus, cx: &App) -> u64 {
 529    if GitPanelSettings::get_global(cx).sort_by_path {
 530        TRACKED_SORT_PREFIX
 531    } else if repo.had_conflict_on_last_merge_head_change(repo_path) {
 532        CONFLICT_SORT_PREFIX
 533    } else if status.is_created() {
 534        NEW_SORT_PREFIX
 535    } else {
 536        TRACKED_SORT_PREFIX
 537    }
 538}
 539
 540impl EventEmitter<EditorEvent> for ProjectDiff {}
 541
 542impl Focusable for ProjectDiff {
 543    fn focus_handle(&self, cx: &App) -> FocusHandle {
 544        if self.multibuffer.read(cx).is_empty() {
 545            self.focus_handle.clone()
 546        } else {
 547            self.editor.focus_handle(cx)
 548        }
 549    }
 550}
 551
 552impl Item for ProjectDiff {
 553    type Event = EditorEvent;
 554
 555    fn tab_icon(&self, _window: &Window, _cx: &App) -> Option<Icon> {
 556        Some(Icon::new(IconName::GitBranch).color(Color::Muted))
 557    }
 558
 559    fn to_item_events(event: &EditorEvent, f: impl FnMut(ItemEvent)) {
 560        Editor::to_item_events(event, f)
 561    }
 562
 563    fn deactivated(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 564        self.editor
 565            .update(cx, |editor, cx| editor.deactivated(window, cx));
 566    }
 567
 568    fn navigate(
 569        &mut self,
 570        data: Box<dyn Any>,
 571        window: &mut Window,
 572        cx: &mut Context<Self>,
 573    ) -> bool {
 574        self.editor
 575            .update(cx, |editor, cx| editor.navigate(data, window, cx))
 576    }
 577
 578    fn tab_tooltip_text(&self, _: &App) -> Option<SharedString> {
 579        Some("Project Diff".into())
 580    }
 581
 582    fn tab_content(&self, params: TabContentParams, _window: &Window, _: &App) -> AnyElement {
 583        Label::new("Uncommitted Changes")
 584            .color(if params.selected {
 585                Color::Default
 586            } else {
 587                Color::Muted
 588            })
 589            .into_any_element()
 590    }
 591
 592    fn tab_content_text(&self, _detail: usize, _: &App) -> SharedString {
 593        "Uncommitted Changes".into()
 594    }
 595
 596    fn telemetry_event_text(&self) -> Option<&'static str> {
 597        Some("Project Diff Opened")
 598    }
 599
 600    fn as_searchable(&self, _: &Entity<Self>) -> Option<Box<dyn SearchableItemHandle>> {
 601        Some(Box::new(self.editor.clone()))
 602    }
 603
 604    fn for_each_project_item(
 605        &self,
 606        cx: &App,
 607        f: &mut dyn FnMut(gpui::EntityId, &dyn project::ProjectItem),
 608    ) {
 609        self.editor.for_each_project_item(cx, f)
 610    }
 611
 612    fn set_nav_history(
 613        &mut self,
 614        nav_history: ItemNavHistory,
 615        _: &mut Window,
 616        cx: &mut Context<Self>,
 617    ) {
 618        self.editor.update(cx, |editor, _| {
 619            editor.set_nav_history(Some(nav_history));
 620        });
 621    }
 622
 623    fn clone_on_split(
 624        &self,
 625        _workspace_id: Option<workspace::WorkspaceId>,
 626        window: &mut Window,
 627        cx: &mut Context<Self>,
 628    ) -> Option<Entity<Self>>
 629    where
 630        Self: Sized,
 631    {
 632        let workspace = self.workspace.upgrade()?;
 633        Some(cx.new(|cx| ProjectDiff::new(self.project.clone(), workspace, window, cx)))
 634    }
 635
 636    fn is_dirty(&self, cx: &App) -> bool {
 637        self.multibuffer.read(cx).is_dirty(cx)
 638    }
 639
 640    fn has_conflict(&self, cx: &App) -> bool {
 641        self.multibuffer.read(cx).has_conflict(cx)
 642    }
 643
 644    fn can_save(&self, _: &App) -> bool {
 645        true
 646    }
 647
 648    fn save(
 649        &mut self,
 650        options: SaveOptions,
 651        project: Entity<Project>,
 652        window: &mut Window,
 653        cx: &mut Context<Self>,
 654    ) -> Task<Result<()>> {
 655        self.editor.save(options, project, window, cx)
 656    }
 657
 658    fn save_as(
 659        &mut self,
 660        _: Entity<Project>,
 661        _: ProjectPath,
 662        _window: &mut Window,
 663        _: &mut Context<Self>,
 664    ) -> Task<Result<()>> {
 665        unreachable!()
 666    }
 667
 668    fn reload(
 669        &mut self,
 670        project: Entity<Project>,
 671        window: &mut Window,
 672        cx: &mut Context<Self>,
 673    ) -> Task<Result<()>> {
 674        self.editor.reload(project, window, cx)
 675    }
 676
 677    fn act_as_type<'a>(
 678        &'a self,
 679        type_id: TypeId,
 680        self_handle: &'a Entity<Self>,
 681        _: &'a App,
 682    ) -> Option<AnyView> {
 683        if type_id == TypeId::of::<Self>() {
 684            Some(self_handle.to_any())
 685        } else if type_id == TypeId::of::<Editor>() {
 686            Some(self.editor.to_any())
 687        } else {
 688            None
 689        }
 690    }
 691
 692    fn breadcrumb_location(&self, _: &App) -> ToolbarItemLocation {
 693        ToolbarItemLocation::PrimaryLeft
 694    }
 695
 696    fn breadcrumbs(&self, theme: &theme::Theme, cx: &App) -> Option<Vec<BreadcrumbText>> {
 697        self.editor.breadcrumbs(theme, cx)
 698    }
 699
 700    fn added_to_workspace(
 701        &mut self,
 702        workspace: &mut Workspace,
 703        window: &mut Window,
 704        cx: &mut Context<Self>,
 705    ) {
 706        self.editor.update(cx, |editor, cx| {
 707            editor.added_to_workspace(workspace, window, cx)
 708        });
 709    }
 710}
 711
 712impl Render for ProjectDiff {
 713    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
 714        let is_empty = self.multibuffer.read(cx).is_empty();
 715
 716        div()
 717            .track_focus(&self.focus_handle)
 718            .key_context(if is_empty { "EmptyPane" } else { "GitDiff" })
 719            .bg(cx.theme().colors().editor_background)
 720            .flex()
 721            .items_center()
 722            .justify_center()
 723            .size_full()
 724            .when(is_empty, |el| {
 725                let remote_button = if let Some(panel) = self
 726                    .workspace
 727                    .upgrade()
 728                    .and_then(|workspace| workspace.read(cx).panel::<GitPanel>(cx))
 729                {
 730                    panel.update(cx, |panel, cx| panel.render_remote_button(cx))
 731                } else {
 732                    None
 733                };
 734                let keybinding_focus_handle = self.focus_handle(cx);
 735                el.child(
 736                    v_flex()
 737                        .gap_1()
 738                        .child(
 739                            h_flex()
 740                                .justify_around()
 741                                .child(Label::new("No uncommitted changes")),
 742                        )
 743                        .map(|el| match remote_button {
 744                            Some(button) => el.child(h_flex().justify_around().child(button)),
 745                            None => el.child(
 746                                h_flex()
 747                                    .justify_around()
 748                                    .child(Label::new("Remote up to date")),
 749                            ),
 750                        })
 751                        .child(
 752                            h_flex().justify_around().mt_1().child(
 753                                Button::new("project-diff-close-button", "Close")
 754                                    // .style(ButtonStyle::Transparent)
 755                                    .key_binding(KeyBinding::for_action_in(
 756                                        &CloseActiveItem::default(),
 757                                        &keybinding_focus_handle,
 758                                        window,
 759                                        cx,
 760                                    ))
 761                                    .on_click(move |_, window, cx| {
 762                                        window.focus(&keybinding_focus_handle);
 763                                        window.dispatch_action(
 764                                            Box::new(CloseActiveItem::default()),
 765                                            cx,
 766                                        );
 767                                    }),
 768                            ),
 769                        ),
 770                )
 771            })
 772            .when(!is_empty, |el| el.child(self.editor.clone()))
 773    }
 774}
 775
 776impl SerializableItem for ProjectDiff {
 777    fn serialized_item_kind() -> &'static str {
 778        "ProjectDiff"
 779    }
 780
 781    fn cleanup(
 782        _: workspace::WorkspaceId,
 783        _: Vec<workspace::ItemId>,
 784        _: &mut Window,
 785        _: &mut App,
 786    ) -> Task<Result<()>> {
 787        Task::ready(Ok(()))
 788    }
 789
 790    fn deserialize(
 791        _project: Entity<Project>,
 792        workspace: WeakEntity<Workspace>,
 793        _workspace_id: workspace::WorkspaceId,
 794        _item_id: workspace::ItemId,
 795        window: &mut Window,
 796        cx: &mut App,
 797    ) -> Task<Result<Entity<Self>>> {
 798        window.spawn(cx, async move |cx| {
 799            workspace.update_in(cx, |workspace, window, cx| {
 800                let workspace_handle = cx.entity();
 801                cx.new(|cx| Self::new(workspace.project().clone(), workspace_handle, window, cx))
 802            })
 803        })
 804    }
 805
 806    fn serialize(
 807        &mut self,
 808        _workspace: &mut Workspace,
 809        _item_id: workspace::ItemId,
 810        _closing: bool,
 811        _window: &mut Window,
 812        _cx: &mut Context<Self>,
 813    ) -> Option<Task<Result<()>>> {
 814        None
 815    }
 816
 817    fn should_serialize(&self, _: &Self::Event) -> bool {
 818        false
 819    }
 820}
 821
 822pub struct ProjectDiffToolbar {
 823    project_diff: Option<WeakEntity<ProjectDiff>>,
 824    workspace: WeakEntity<Workspace>,
 825}
 826
 827impl ProjectDiffToolbar {
 828    pub fn new(workspace: &Workspace, _: &mut Context<Self>) -> Self {
 829        Self {
 830            project_diff: None,
 831            workspace: workspace.weak_handle(),
 832        }
 833    }
 834
 835    fn project_diff(&self, _: &App) -> Option<Entity<ProjectDiff>> {
 836        self.project_diff.as_ref()?.upgrade()
 837    }
 838
 839    fn dispatch_action(&self, action: &dyn Action, window: &mut Window, cx: &mut Context<Self>) {
 840        if let Some(project_diff) = self.project_diff(cx) {
 841            project_diff.focus_handle(cx).focus(window);
 842        }
 843        let action = action.boxed_clone();
 844        cx.defer(move |cx| {
 845            cx.dispatch_action(action.as_ref());
 846        })
 847    }
 848
 849    fn stage_all(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 850        self.workspace
 851            .update(cx, |workspace, cx| {
 852                if let Some(panel) = workspace.panel::<GitPanel>(cx) {
 853                    panel.update(cx, |panel, cx| {
 854                        panel.stage_all(&Default::default(), window, cx);
 855                    });
 856                }
 857            })
 858            .ok();
 859    }
 860
 861    fn unstage_all(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 862        self.workspace
 863            .update(cx, |workspace, cx| {
 864                let Some(panel) = workspace.panel::<GitPanel>(cx) else {
 865                    return;
 866                };
 867                panel.update(cx, |panel, cx| {
 868                    panel.unstage_all(&Default::default(), window, cx);
 869                });
 870            })
 871            .ok();
 872    }
 873}
 874
 875impl EventEmitter<ToolbarItemEvent> for ProjectDiffToolbar {}
 876
 877impl ToolbarItemView for ProjectDiffToolbar {
 878    fn set_active_pane_item(
 879        &mut self,
 880        active_pane_item: Option<&dyn ItemHandle>,
 881        _: &mut Window,
 882        cx: &mut Context<Self>,
 883    ) -> ToolbarItemLocation {
 884        self.project_diff = active_pane_item
 885            .and_then(|item| item.act_as::<ProjectDiff>(cx))
 886            .map(|entity| entity.downgrade());
 887        if self.project_diff.is_some() {
 888            ToolbarItemLocation::PrimaryRight
 889        } else {
 890            ToolbarItemLocation::Hidden
 891        }
 892    }
 893
 894    fn pane_focus_update(
 895        &mut self,
 896        _pane_focused: bool,
 897        _window: &mut Window,
 898        _cx: &mut Context<Self>,
 899    ) {
 900    }
 901}
 902
 903struct ButtonStates {
 904    stage: bool,
 905    unstage: bool,
 906    prev_next: bool,
 907    selection: bool,
 908    stage_all: bool,
 909    unstage_all: bool,
 910}
 911
 912impl Render for ProjectDiffToolbar {
 913    fn render(&mut self, _: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
 914        let Some(project_diff) = self.project_diff(cx) else {
 915            return div();
 916        };
 917        let focus_handle = project_diff.focus_handle(cx);
 918        let button_states = project_diff.read(cx).button_states(cx);
 919
 920        h_group_xl()
 921            .my_neg_1()
 922            .py_1()
 923            .items_center()
 924            .flex_wrap()
 925            .justify_between()
 926            .child(
 927                h_group_sm()
 928                    .when(button_states.selection, |el| {
 929                        el.child(
 930                            Button::new("stage", "Toggle Staged")
 931                                .tooltip(Tooltip::for_action_title_in(
 932                                    "Toggle Staged",
 933                                    &ToggleStaged,
 934                                    &focus_handle,
 935                                ))
 936                                .disabled(!button_states.stage && !button_states.unstage)
 937                                .on_click(cx.listener(|this, _, window, cx| {
 938                                    this.dispatch_action(&ToggleStaged, window, cx)
 939                                })),
 940                        )
 941                    })
 942                    .when(!button_states.selection, |el| {
 943                        el.child(
 944                            Button::new("stage", "Stage")
 945                                .tooltip(Tooltip::for_action_title_in(
 946                                    "Stage and go to next hunk",
 947                                    &StageAndNext,
 948                                    &focus_handle,
 949                                ))
 950                                .disabled(
 951                                    !button_states.prev_next
 952                                        && !button_states.stage_all
 953                                        && !button_states.unstage_all,
 954                                )
 955                                .on_click(cx.listener(|this, _, window, cx| {
 956                                    this.dispatch_action(&StageAndNext, window, cx)
 957                                })),
 958                        )
 959                        .child(
 960                            Button::new("unstage", "Unstage")
 961                                .tooltip(Tooltip::for_action_title_in(
 962                                    "Unstage and go to next hunk",
 963                                    &UnstageAndNext,
 964                                    &focus_handle,
 965                                ))
 966                                .disabled(
 967                                    !button_states.prev_next
 968                                        && !button_states.stage_all
 969                                        && !button_states.unstage_all,
 970                                )
 971                                .on_click(cx.listener(|this, _, window, cx| {
 972                                    this.dispatch_action(&UnstageAndNext, window, cx)
 973                                })),
 974                        )
 975                    }),
 976            )
 977            // n.b. the only reason these arrows are here is because we don't
 978            // support "undo" for staging so we need a way to go back.
 979            .child(
 980                h_group_sm()
 981                    .child(
 982                        IconButton::new("up", IconName::ArrowUp)
 983                            .shape(ui::IconButtonShape::Square)
 984                            .tooltip(Tooltip::for_action_title_in(
 985                                "Go to previous hunk",
 986                                &GoToPreviousHunk,
 987                                &focus_handle,
 988                            ))
 989                            .disabled(!button_states.prev_next)
 990                            .on_click(cx.listener(|this, _, window, cx| {
 991                                this.dispatch_action(&GoToPreviousHunk, window, cx)
 992                            })),
 993                    )
 994                    .child(
 995                        IconButton::new("down", IconName::ArrowDown)
 996                            .shape(ui::IconButtonShape::Square)
 997                            .tooltip(Tooltip::for_action_title_in(
 998                                "Go to next hunk",
 999                                &GoToHunk,
1000                                &focus_handle,
1001                            ))
1002                            .disabled(!button_states.prev_next)
1003                            .on_click(cx.listener(|this, _, window, cx| {
1004                                this.dispatch_action(&GoToHunk, window, cx)
1005                            })),
1006                    ),
1007            )
1008            .child(vertical_divider())
1009            .child(
1010                h_group_sm()
1011                    .when(
1012                        button_states.unstage_all && !button_states.stage_all,
1013                        |el| {
1014                            el.child(
1015                                Button::new("unstage-all", "Unstage All")
1016                                    .tooltip(Tooltip::for_action_title_in(
1017                                        "Unstage all changes",
1018                                        &UnstageAll,
1019                                        &focus_handle,
1020                                    ))
1021                                    .on_click(cx.listener(|this, _, window, cx| {
1022                                        this.unstage_all(window, cx)
1023                                    })),
1024                            )
1025                        },
1026                    )
1027                    .when(
1028                        !button_states.unstage_all || button_states.stage_all,
1029                        |el| {
1030                            el.child(
1031                                // todo make it so that changing to say "Unstaged"
1032                                // doesn't change the position.
1033                                div().child(
1034                                    Button::new("stage-all", "Stage All")
1035                                        .disabled(!button_states.stage_all)
1036                                        .tooltip(Tooltip::for_action_title_in(
1037                                            "Stage all changes",
1038                                            &StageAll,
1039                                            &focus_handle,
1040                                        ))
1041                                        .on_click(cx.listener(|this, _, window, cx| {
1042                                            this.stage_all(window, cx)
1043                                        })),
1044                                ),
1045                            )
1046                        },
1047                    )
1048                    .child(
1049                        Button::new("commit", "Commit")
1050                            .tooltip(Tooltip::for_action_title_in(
1051                                "Commit",
1052                                &Commit,
1053                                &focus_handle,
1054                            ))
1055                            .on_click(cx.listener(|this, _, window, cx| {
1056                                this.dispatch_action(&Commit, window, cx);
1057                            })),
1058                    ),
1059            )
1060    }
1061}
1062
1063#[derive(IntoElement, RegisterComponent)]
1064pub struct ProjectDiffEmptyState {
1065    pub no_repo: bool,
1066    pub can_push_and_pull: bool,
1067    pub focus_handle: Option<FocusHandle>,
1068    pub current_branch: Option<Branch>,
1069    // has_pending_commits: bool,
1070    // ahead_of_remote: bool,
1071    // no_git_repository: bool,
1072}
1073
1074impl RenderOnce for ProjectDiffEmptyState {
1075    fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
1076        let status_against_remote = |ahead_by: usize, behind_by: usize| -> bool {
1077            matches!(self.current_branch, Some(Branch {
1078                    upstream:
1079                        Some(Upstream {
1080                            tracking:
1081                                UpstreamTracking::Tracked(UpstreamTrackingStatus {
1082                                    ahead, behind, ..
1083                                }),
1084                            ..
1085                        }),
1086                    ..
1087                }) if (ahead > 0) == (ahead_by > 0) && (behind > 0) == (behind_by > 0))
1088        };
1089
1090        let change_count = |current_branch: &Branch| -> (usize, usize) {
1091            match current_branch {
1092                Branch {
1093                    upstream:
1094                        Some(Upstream {
1095                            tracking:
1096                                UpstreamTracking::Tracked(UpstreamTrackingStatus {
1097                                    ahead, behind, ..
1098                                }),
1099                            ..
1100                        }),
1101                    ..
1102                } => (*ahead as usize, *behind as usize),
1103                _ => (0, 0),
1104            }
1105        };
1106
1107        let not_ahead_or_behind = status_against_remote(0, 0);
1108        let ahead_of_remote = status_against_remote(1, 0);
1109        let branch_not_on_remote = if let Some(branch) = self.current_branch.as_ref() {
1110            branch.upstream.is_none()
1111        } else {
1112            false
1113        };
1114
1115        let has_branch_container = |branch: &Branch| {
1116            h_flex()
1117                .max_w(px(420.))
1118                .bg(cx.theme().colors().text.opacity(0.05))
1119                .border_1()
1120                .border_color(cx.theme().colors().border)
1121                .rounded_sm()
1122                .gap_8()
1123                .px_6()
1124                .py_4()
1125                .map(|this| {
1126                    if ahead_of_remote {
1127                        let ahead_count = change_count(branch).0;
1128                        let ahead_string = format!("{} Commits Ahead", ahead_count);
1129                        this.child(
1130                            v_flex()
1131                                .child(Headline::new(ahead_string).size(HeadlineSize::Small))
1132                                .child(
1133                                    Label::new(format!("Push your changes to {}", branch.name()))
1134                                        .color(Color::Muted),
1135                                ),
1136                        )
1137                        .child(div().child(render_push_button(
1138                            self.focus_handle,
1139                            "push".into(),
1140                            ahead_count as u32,
1141                        )))
1142                    } else if branch_not_on_remote {
1143                        this.child(
1144                            v_flex()
1145                                .child(Headline::new("Publish Branch").size(HeadlineSize::Small))
1146                                .child(
1147                                    Label::new(format!("Create {} on remote", branch.name()))
1148                                        .color(Color::Muted),
1149                                ),
1150                        )
1151                        .child(
1152                            div().child(render_publish_button(self.focus_handle, "publish".into())),
1153                        )
1154                    } else {
1155                        this.child(Label::new("Remote status unknown").color(Color::Muted))
1156                    }
1157                })
1158        };
1159
1160        v_flex().size_full().items_center().justify_center().child(
1161            v_flex()
1162                .gap_1()
1163                .when(self.no_repo, |this| {
1164                    // TODO: add git init
1165                    this.text_center()
1166                        .child(Label::new("No Repository").color(Color::Muted))
1167                })
1168                .map(|this| {
1169                    if not_ahead_or_behind && self.current_branch.is_some() {
1170                        this.text_center()
1171                            .child(Label::new("No Changes").color(Color::Muted))
1172                    } else {
1173                        this.when_some(self.current_branch.as_ref(), |this, branch| {
1174                            this.child(has_branch_container(branch))
1175                        })
1176                    }
1177                }),
1178        )
1179    }
1180}
1181
1182mod preview {
1183    use git::repository::{
1184        Branch, CommitSummary, Upstream, UpstreamTracking, UpstreamTrackingStatus,
1185    };
1186    use ui::prelude::*;
1187
1188    use super::ProjectDiffEmptyState;
1189
1190    // View this component preview using `workspace: open component-preview`
1191    impl Component for ProjectDiffEmptyState {
1192        fn scope() -> ComponentScope {
1193            ComponentScope::VersionControl
1194        }
1195
1196        fn preview(_window: &mut Window, _cx: &mut App) -> Option<AnyElement> {
1197            let unknown_upstream: Option<UpstreamTracking> = None;
1198            let ahead_of_upstream: Option<UpstreamTracking> = Some(
1199                UpstreamTrackingStatus {
1200                    ahead: 2,
1201                    behind: 0,
1202                }
1203                .into(),
1204            );
1205
1206            let not_ahead_or_behind_upstream: Option<UpstreamTracking> = Some(
1207                UpstreamTrackingStatus {
1208                    ahead: 0,
1209                    behind: 0,
1210                }
1211                .into(),
1212            );
1213
1214            fn branch(upstream: Option<UpstreamTracking>) -> Branch {
1215                Branch {
1216                    is_head: true,
1217                    ref_name: "some-branch".into(),
1218                    upstream: upstream.map(|tracking| Upstream {
1219                        ref_name: "origin/some-branch".into(),
1220                        tracking,
1221                    }),
1222                    most_recent_commit: Some(CommitSummary {
1223                        sha: "abc123".into(),
1224                        subject: "Modify stuff".into(),
1225                        commit_timestamp: 1710932954,
1226                        author_name: "John Doe".into(),
1227                        has_parent: true,
1228                    }),
1229                }
1230            }
1231
1232            let no_repo_state = ProjectDiffEmptyState {
1233                no_repo: true,
1234                can_push_and_pull: false,
1235                focus_handle: None,
1236                current_branch: None,
1237            };
1238
1239            let no_changes_state = ProjectDiffEmptyState {
1240                no_repo: false,
1241                can_push_and_pull: true,
1242                focus_handle: None,
1243                current_branch: Some(branch(not_ahead_or_behind_upstream)),
1244            };
1245
1246            let ahead_of_upstream_state = ProjectDiffEmptyState {
1247                no_repo: false,
1248                can_push_and_pull: true,
1249                focus_handle: None,
1250                current_branch: Some(branch(ahead_of_upstream)),
1251            };
1252
1253            let unknown_upstream_state = ProjectDiffEmptyState {
1254                no_repo: false,
1255                can_push_and_pull: true,
1256                focus_handle: None,
1257                current_branch: Some(branch(unknown_upstream)),
1258            };
1259
1260            let (width, height) = (px(480.), px(320.));
1261
1262            Some(
1263                v_flex()
1264                    .gap_6()
1265                    .children(vec![
1266                        example_group(vec![
1267                            single_example(
1268                                "No Repo",
1269                                div()
1270                                    .w(width)
1271                                    .h(height)
1272                                    .child(no_repo_state)
1273                                    .into_any_element(),
1274                            ),
1275                            single_example(
1276                                "No Changes",
1277                                div()
1278                                    .w(width)
1279                                    .h(height)
1280                                    .child(no_changes_state)
1281                                    .into_any_element(),
1282                            ),
1283                            single_example(
1284                                "Unknown Upstream",
1285                                div()
1286                                    .w(width)
1287                                    .h(height)
1288                                    .child(unknown_upstream_state)
1289                                    .into_any_element(),
1290                            ),
1291                            single_example(
1292                                "Ahead of Remote",
1293                                div()
1294                                    .w(width)
1295                                    .h(height)
1296                                    .child(ahead_of_upstream_state)
1297                                    .into_any_element(),
1298                            ),
1299                        ])
1300                        .vertical(),
1301                    ])
1302                    .into_any_element(),
1303            )
1304        }
1305    }
1306}
1307
1308fn merge_anchor_ranges<'a>(
1309    left: impl 'a + Iterator<Item = Range<Anchor>>,
1310    right: impl 'a + Iterator<Item = Range<Anchor>>,
1311    snapshot: &'a language::BufferSnapshot,
1312) -> impl 'a + Iterator<Item = Range<Anchor>> {
1313    let mut left = left.fuse().peekable();
1314    let mut right = right.fuse().peekable();
1315
1316    std::iter::from_fn(move || {
1317        let Some(left_range) = left.peek() else {
1318            return right.next();
1319        };
1320        let Some(right_range) = right.peek() else {
1321            return left.next();
1322        };
1323
1324        let mut next_range = if left_range.start.cmp(&right_range.start, snapshot).is_lt() {
1325            left.next().unwrap()
1326        } else {
1327            right.next().unwrap()
1328        };
1329
1330        // Extend the basic range while there's overlap with a range from either stream.
1331        loop {
1332            if let Some(left_range) = left
1333                .peek()
1334                .filter(|range| range.start.cmp(&next_range.end, snapshot).is_le())
1335                .cloned()
1336            {
1337                left.next();
1338                next_range.end = left_range.end;
1339            } else if let Some(right_range) = right
1340                .peek()
1341                .filter(|range| range.start.cmp(&next_range.end, snapshot).is_le())
1342                .cloned()
1343            {
1344                right.next();
1345                next_range.end = right_range.end;
1346            } else {
1347                break;
1348            }
1349        }
1350
1351        Some(next_range)
1352    })
1353}
1354
1355#[cfg(test)]
1356mod tests {
1357    use db::indoc;
1358    use editor::test::editor_test_context::{EditorTestContext, assert_state_with_diff};
1359    use git::status::{UnmergedStatus, UnmergedStatusCode};
1360    use gpui::TestAppContext;
1361    use project::FakeFs;
1362    use serde_json::json;
1363    use settings::SettingsStore;
1364    use std::path::Path;
1365    use unindent::Unindent as _;
1366    use util::{path, rel_path::rel_path};
1367
1368    use super::*;
1369
1370    #[ctor::ctor]
1371    fn init_logger() {
1372        zlog::init_test();
1373    }
1374
1375    fn init_test(cx: &mut TestAppContext) {
1376        cx.update(|cx| {
1377            let store = SettingsStore::test(cx);
1378            cx.set_global(store);
1379            theme::init(theme::LoadThemes::JustBase, cx);
1380            language::init(cx);
1381            Project::init_settings(cx);
1382            workspace::init_settings(cx);
1383            editor::init(cx);
1384            crate::init(cx);
1385        });
1386    }
1387
1388    #[gpui::test]
1389    async fn test_save_after_restore(cx: &mut TestAppContext) {
1390        init_test(cx);
1391
1392        let fs = FakeFs::new(cx.executor());
1393        fs.insert_tree(
1394            path!("/project"),
1395            json!({
1396                ".git": {},
1397                "foo.txt": "FOO\n",
1398            }),
1399        )
1400        .await;
1401        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
1402        let (workspace, cx) =
1403            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1404        let diff = cx.new_window_entity(|window, cx| {
1405            ProjectDiff::new(project.clone(), workspace, window, cx)
1406        });
1407        cx.run_until_parked();
1408
1409        fs.set_head_for_repo(
1410            path!("/project/.git").as_ref(),
1411            &[("foo.txt", "foo\n".into())],
1412            "deadbeef",
1413        );
1414        fs.set_index_for_repo(
1415            path!("/project/.git").as_ref(),
1416            &[("foo.txt", "foo\n".into())],
1417        );
1418        cx.run_until_parked();
1419
1420        let editor = diff.read_with(cx, |diff, _| diff.editor.clone());
1421        assert_state_with_diff(
1422            &editor,
1423            cx,
1424            &"
1425                - foo
1426                + ˇFOO
1427            "
1428            .unindent(),
1429        );
1430
1431        editor.update_in(cx, |editor, window, cx| {
1432            editor.git_restore(&Default::default(), window, cx);
1433        });
1434        cx.run_until_parked();
1435
1436        assert_state_with_diff(&editor, cx, &"ˇ".unindent());
1437
1438        let text = String::from_utf8(fs.read_file_sync("/project/foo.txt").unwrap()).unwrap();
1439        assert_eq!(text, "foo\n");
1440    }
1441
1442    #[gpui::test]
1443    async fn test_scroll_to_beginning_with_deletion(cx: &mut TestAppContext) {
1444        init_test(cx);
1445
1446        let fs = FakeFs::new(cx.executor());
1447        fs.insert_tree(
1448            path!("/project"),
1449            json!({
1450                ".git": {},
1451                "bar": "BAR\n",
1452                "foo": "FOO\n",
1453            }),
1454        )
1455        .await;
1456        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
1457        let (workspace, cx) =
1458            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1459        let diff = cx.new_window_entity(|window, cx| {
1460            ProjectDiff::new(project.clone(), workspace, window, cx)
1461        });
1462        cx.run_until_parked();
1463
1464        fs.set_head_and_index_for_repo(
1465            path!("/project/.git").as_ref(),
1466            &[("bar", "bar\n".into()), ("foo", "foo\n".into())],
1467        );
1468        cx.run_until_parked();
1469
1470        let editor = cx.update_window_entity(&diff, |diff, window, cx| {
1471            diff.move_to_path(
1472                PathKey::with_sort_prefix(TRACKED_SORT_PREFIX, rel_path("foo").into_arc()),
1473                window,
1474                cx,
1475            );
1476            diff.editor.clone()
1477        });
1478        assert_state_with_diff(
1479            &editor,
1480            cx,
1481            &"
1482                - bar
1483                + BAR
1484
1485                - ˇfoo
1486                + FOO
1487            "
1488            .unindent(),
1489        );
1490
1491        let editor = cx.update_window_entity(&diff, |diff, window, cx| {
1492            diff.move_to_path(
1493                PathKey::with_sort_prefix(TRACKED_SORT_PREFIX, rel_path("bar").into_arc()),
1494                window,
1495                cx,
1496            );
1497            diff.editor.clone()
1498        });
1499        assert_state_with_diff(
1500            &editor,
1501            cx,
1502            &"
1503                - ˇbar
1504                + BAR
1505
1506                - foo
1507                + FOO
1508            "
1509            .unindent(),
1510        );
1511    }
1512
1513    #[gpui::test]
1514    async fn test_hunks_after_restore_then_modify(cx: &mut TestAppContext) {
1515        init_test(cx);
1516
1517        let fs = FakeFs::new(cx.executor());
1518        fs.insert_tree(
1519            path!("/project"),
1520            json!({
1521                ".git": {},
1522                "foo": "modified\n",
1523            }),
1524        )
1525        .await;
1526        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
1527        let (workspace, cx) =
1528            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1529        let buffer = project
1530            .update(cx, |project, cx| {
1531                project.open_local_buffer(path!("/project/foo"), cx)
1532            })
1533            .await
1534            .unwrap();
1535        let buffer_editor = cx.new_window_entity(|window, cx| {
1536            Editor::for_buffer(buffer, Some(project.clone()), window, cx)
1537        });
1538        let diff = cx.new_window_entity(|window, cx| {
1539            ProjectDiff::new(project.clone(), workspace, window, cx)
1540        });
1541        cx.run_until_parked();
1542
1543        fs.set_head_for_repo(
1544            path!("/project/.git").as_ref(),
1545            &[("foo", "original\n".into())],
1546            "deadbeef",
1547        );
1548        cx.run_until_parked();
1549
1550        let diff_editor = diff.read_with(cx, |diff, _| diff.editor.clone());
1551
1552        assert_state_with_diff(
1553            &diff_editor,
1554            cx,
1555            &"
1556                - original
1557                + ˇmodified
1558            "
1559            .unindent(),
1560        );
1561
1562        let prev_buffer_hunks =
1563            cx.update_window_entity(&buffer_editor, |buffer_editor, window, cx| {
1564                let snapshot = buffer_editor.snapshot(window, cx);
1565                let snapshot = &snapshot.buffer_snapshot();
1566                let prev_buffer_hunks = buffer_editor
1567                    .diff_hunks_in_ranges(&[editor::Anchor::min()..editor::Anchor::max()], snapshot)
1568                    .collect::<Vec<_>>();
1569                buffer_editor.git_restore(&Default::default(), window, cx);
1570                prev_buffer_hunks
1571            });
1572        assert_eq!(prev_buffer_hunks.len(), 1);
1573        cx.run_until_parked();
1574
1575        let new_buffer_hunks =
1576            cx.update_window_entity(&buffer_editor, |buffer_editor, window, cx| {
1577                let snapshot = buffer_editor.snapshot(window, cx);
1578                let snapshot = &snapshot.buffer_snapshot();
1579                buffer_editor
1580                    .diff_hunks_in_ranges(&[editor::Anchor::min()..editor::Anchor::max()], snapshot)
1581                    .collect::<Vec<_>>()
1582            });
1583        assert_eq!(new_buffer_hunks.as_slice(), &[]);
1584
1585        cx.update_window_entity(&buffer_editor, |buffer_editor, window, cx| {
1586            buffer_editor.set_text("different\n", window, cx);
1587            buffer_editor.save(
1588                SaveOptions {
1589                    format: false,
1590                    autosave: false,
1591                },
1592                project.clone(),
1593                window,
1594                cx,
1595            )
1596        })
1597        .await
1598        .unwrap();
1599
1600        cx.run_until_parked();
1601
1602        cx.update_window_entity(&buffer_editor, |buffer_editor, window, cx| {
1603            buffer_editor.expand_all_diff_hunks(&Default::default(), window, cx);
1604        });
1605
1606        assert_state_with_diff(
1607            &buffer_editor,
1608            cx,
1609            &"
1610                - original
1611                + different
1612                  ˇ"
1613            .unindent(),
1614        );
1615
1616        assert_state_with_diff(
1617            &diff_editor,
1618            cx,
1619            &"
1620                - original
1621                + different
1622                  ˇ"
1623            .unindent(),
1624        );
1625    }
1626
1627    use crate::{
1628        conflict_view::resolve_conflict,
1629        project_diff::{self, ProjectDiff},
1630    };
1631
1632    #[gpui::test]
1633    async fn test_go_to_prev_hunk_multibuffer(cx: &mut TestAppContext) {
1634        init_test(cx);
1635
1636        let fs = FakeFs::new(cx.executor());
1637        fs.insert_tree(
1638            path!("/a"),
1639            json!({
1640                ".git": {},
1641                "a.txt": "created\n",
1642                "b.txt": "really changed\n",
1643                "c.txt": "unchanged\n"
1644            }),
1645        )
1646        .await;
1647
1648        fs.set_head_and_index_for_repo(
1649            Path::new(path!("/a/.git")),
1650            &[
1651                ("b.txt", "before\n".to_string()),
1652                ("c.txt", "unchanged\n".to_string()),
1653                ("d.txt", "deleted\n".to_string()),
1654            ],
1655        );
1656
1657        let project = Project::test(fs, [Path::new(path!("/a"))], cx).await;
1658        let (workspace, cx) =
1659            cx.add_window_view(|window, cx| Workspace::test_new(project, window, cx));
1660
1661        cx.run_until_parked();
1662
1663        cx.focus(&workspace);
1664        cx.update(|window, cx| {
1665            window.dispatch_action(project_diff::Diff.boxed_clone(), cx);
1666        });
1667
1668        cx.run_until_parked();
1669
1670        let item = workspace.update(cx, |workspace, cx| {
1671            workspace.active_item_as::<ProjectDiff>(cx).unwrap()
1672        });
1673        cx.focus(&item);
1674        let editor = item.read_with(cx, |item, _| item.editor.clone());
1675
1676        let mut cx = EditorTestContext::for_editor_in(editor, cx).await;
1677
1678        cx.assert_excerpts_with_selections(indoc!(
1679            "
1680            [EXCERPT]
1681            before
1682            really changed
1683            [EXCERPT]
1684            [FOLDED]
1685            [EXCERPT]
1686            ˇcreated
1687        "
1688        ));
1689
1690        cx.dispatch_action(editor::actions::GoToPreviousHunk);
1691
1692        cx.assert_excerpts_with_selections(indoc!(
1693            "
1694            [EXCERPT]
1695            before
1696            really changed
1697            [EXCERPT]
1698            ˇ[FOLDED]
1699            [EXCERPT]
1700            created
1701        "
1702        ));
1703
1704        cx.dispatch_action(editor::actions::GoToPreviousHunk);
1705
1706        cx.assert_excerpts_with_selections(indoc!(
1707            "
1708            [EXCERPT]
1709            ˇbefore
1710            really changed
1711            [EXCERPT]
1712            [FOLDED]
1713            [EXCERPT]
1714            created
1715        "
1716        ));
1717    }
1718
1719    #[gpui::test]
1720    async fn test_excerpts_splitting_after_restoring_the_middle_excerpt(cx: &mut TestAppContext) {
1721        init_test(cx);
1722
1723        let git_contents = indoc! {r#"
1724            #[rustfmt::skip]
1725            fn main() {
1726                let x = 0.0; // this line will be removed
1727                // 1
1728                // 2
1729                // 3
1730                let y = 0.0; // this line will be removed
1731                // 1
1732                // 2
1733                // 3
1734                let arr = [
1735                    0.0, // this line will be removed
1736                    0.0, // this line will be removed
1737                    0.0, // this line will be removed
1738                    0.0, // this line will be removed
1739                ];
1740            }
1741        "#};
1742        let buffer_contents = indoc! {"
1743            #[rustfmt::skip]
1744            fn main() {
1745                // 1
1746                // 2
1747                // 3
1748                // 1
1749                // 2
1750                // 3
1751                let arr = [
1752                ];
1753            }
1754        "};
1755
1756        let fs = FakeFs::new(cx.executor());
1757        fs.insert_tree(
1758            path!("/a"),
1759            json!({
1760                ".git": {},
1761                "main.rs": buffer_contents,
1762            }),
1763        )
1764        .await;
1765
1766        fs.set_head_and_index_for_repo(
1767            Path::new(path!("/a/.git")),
1768            &[("main.rs", git_contents.to_owned())],
1769        );
1770
1771        let project = Project::test(fs, [Path::new(path!("/a"))], cx).await;
1772        let (workspace, cx) =
1773            cx.add_window_view(|window, cx| Workspace::test_new(project, window, cx));
1774
1775        cx.run_until_parked();
1776
1777        cx.focus(&workspace);
1778        cx.update(|window, cx| {
1779            window.dispatch_action(project_diff::Diff.boxed_clone(), cx);
1780        });
1781
1782        cx.run_until_parked();
1783
1784        let item = workspace.update(cx, |workspace, cx| {
1785            workspace.active_item_as::<ProjectDiff>(cx).unwrap()
1786        });
1787        cx.focus(&item);
1788        let editor = item.read_with(cx, |item, _| item.editor.clone());
1789
1790        let mut cx = EditorTestContext::for_editor_in(editor, cx).await;
1791
1792        cx.assert_excerpts_with_selections(&format!("[EXCERPT]\nˇ{git_contents}"));
1793
1794        cx.dispatch_action(editor::actions::GoToHunk);
1795        cx.dispatch_action(editor::actions::GoToHunk);
1796        cx.dispatch_action(git::Restore);
1797        cx.dispatch_action(editor::actions::MoveToBeginning);
1798
1799        cx.assert_excerpts_with_selections(&format!("[EXCERPT]\nˇ{git_contents}"));
1800    }
1801
1802    #[gpui::test]
1803    async fn test_saving_resolved_conflicts(cx: &mut TestAppContext) {
1804        init_test(cx);
1805
1806        let fs = FakeFs::new(cx.executor());
1807        fs.insert_tree(
1808            path!("/project"),
1809            json!({
1810                ".git": {},
1811                "foo": "<<<<<<< x\nours\n=======\ntheirs\n>>>>>>> y\n",
1812            }),
1813        )
1814        .await;
1815        fs.set_status_for_repo(
1816            Path::new(path!("/project/.git")),
1817            &[(
1818                "foo",
1819                UnmergedStatus {
1820                    first_head: UnmergedStatusCode::Updated,
1821                    second_head: UnmergedStatusCode::Updated,
1822                }
1823                .into(),
1824            )],
1825        );
1826        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
1827        let (workspace, cx) =
1828            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1829        let diff = cx.new_window_entity(|window, cx| {
1830            ProjectDiff::new(project.clone(), workspace, window, cx)
1831        });
1832        cx.run_until_parked();
1833
1834        cx.update(|window, cx| {
1835            let editor = diff.read(cx).editor.clone();
1836            let excerpt_ids = editor.read(cx).buffer().read(cx).excerpt_ids();
1837            assert_eq!(excerpt_ids.len(), 1);
1838            let excerpt_id = excerpt_ids[0];
1839            let buffer = editor
1840                .read(cx)
1841                .buffer()
1842                .read(cx)
1843                .all_buffers()
1844                .into_iter()
1845                .next()
1846                .unwrap();
1847            let buffer_id = buffer.read(cx).remote_id();
1848            let conflict_set = diff
1849                .read(cx)
1850                .editor
1851                .read(cx)
1852                .addon::<ConflictAddon>()
1853                .unwrap()
1854                .conflict_set(buffer_id)
1855                .unwrap();
1856            assert!(conflict_set.read(cx).has_conflict);
1857            let snapshot = conflict_set.read(cx).snapshot();
1858            assert_eq!(snapshot.conflicts.len(), 1);
1859
1860            let ours_range = snapshot.conflicts[0].ours.clone();
1861
1862            resolve_conflict(
1863                editor.downgrade(),
1864                excerpt_id,
1865                snapshot.conflicts[0].clone(),
1866                vec![ours_range],
1867                window,
1868                cx,
1869            )
1870        })
1871        .await;
1872
1873        let contents = fs.read_file_sync(path!("/project/foo")).unwrap();
1874        let contents = String::from_utf8(contents).unwrap();
1875        assert_eq!(contents, "ours\n");
1876    }
1877
1878    #[gpui::test]
1879    async fn test_new_hunk_in_modified_file(cx: &mut TestAppContext) {
1880        init_test(cx);
1881
1882        let fs = FakeFs::new(cx.executor());
1883        fs.insert_tree(
1884            path!("/project"),
1885            json!({
1886                ".git": {},
1887                "foo.txt": "
1888                    one
1889                    two
1890                    three
1891                    four
1892                    five
1893                    six
1894                    seven
1895                    eight
1896                    nine
1897                    ten
1898                    ELEVEN
1899                    twelve
1900                ".unindent()
1901            }),
1902        )
1903        .await;
1904        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
1905        let (workspace, cx) =
1906            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1907        let diff = cx.new_window_entity(|window, cx| {
1908            ProjectDiff::new(project.clone(), workspace, window, cx)
1909        });
1910        cx.run_until_parked();
1911
1912        fs.set_head_and_index_for_repo(
1913            Path::new(path!("/project/.git")),
1914            &[(
1915                "foo.txt",
1916                "
1917                    one
1918                    two
1919                    three
1920                    four
1921                    five
1922                    six
1923                    seven
1924                    eight
1925                    nine
1926                    ten
1927                    eleven
1928                    twelve
1929                "
1930                .unindent(),
1931            )],
1932        );
1933        cx.run_until_parked();
1934
1935        let editor = diff.read_with(cx, |diff, _| diff.editor.clone());
1936
1937        assert_state_with_diff(
1938            &editor,
1939            cx,
1940            &"
1941                  ˇnine
1942                  ten
1943                - eleven
1944                + ELEVEN
1945                  twelve
1946            "
1947            .unindent(),
1948        );
1949
1950        let buffer = project
1951            .update(cx, |project, cx| {
1952                project.open_local_buffer(path!("/project/foo.txt"), cx)
1953            })
1954            .await
1955            .unwrap();
1956        buffer.update(cx, |buffer, cx| {
1957            buffer.edit_via_marked_text(
1958                &"
1959                    one
1960                    «TWO»
1961                    three
1962                    four
1963                    five
1964                    six
1965                    seven
1966                    eight
1967                    nine
1968                    ten
1969                    ELEVEN
1970                    twelve
1971                "
1972                .unindent(),
1973                None,
1974                cx,
1975            );
1976        });
1977        project
1978            .update(cx, |project, cx| project.save_buffer(buffer.clone(), cx))
1979            .await
1980            .unwrap();
1981        cx.run_until_parked();
1982
1983        assert_state_with_diff(
1984            &editor,
1985            cx,
1986            &"
1987                  one
1988                - two
1989                + TWO
1990                  three
1991                  four
1992                  five
1993                  ˇnine
1994                  ten
1995                - eleven
1996                + ELEVEN
1997                  twelve
1998            "
1999            .unindent(),
2000        );
2001    }
2002}