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    resolve_active_repository,
   7};
   8use anyhow::{Context as _, Result, anyhow};
   9use buffer_diff::{BufferDiff, DiffHunkSecondaryStatus};
  10use collections::{HashMap, HashSet};
  11use editor::{
  12    Addon, Editor, EditorEvent, EditorSettings, SelectionEffects, SplittableEditor,
  13    actions::{GoToHunk, GoToPreviousHunk, SendReviewToAgent},
  14    multibuffer_context_lines,
  15    scroll::Autoscroll,
  16};
  17
  18use git::{
  19    Commit, StageAll, StageAndNext, ToggleStaged, UnstageAll, UnstageAndNext,
  20    repository::{Branch, RepoPath, Upstream, UpstreamTracking, UpstreamTrackingStatus},
  21    status::FileStatus,
  22};
  23use gpui::{
  24    Action, AnyElement, App, AppContext as _, AsyncWindowContext, Entity, EventEmitter,
  25    FocusHandle, Focusable, Render, Subscription, Task, WeakEntity, actions,
  26};
  27use language::{Anchor, Buffer, Capability, OffsetRangeExt};
  28use multi_buffer::{MultiBuffer, PathKey};
  29use project::{
  30    Project, ProjectPath,
  31    git_store::{
  32        Repository,
  33        branch_diff::{self, BranchDiffEvent, DiffBase},
  34    },
  35};
  36use settings::{Settings, SettingsStore};
  37use smol::future::yield_now;
  38use std::any::{Any, TypeId};
  39use std::sync::Arc;
  40use theme::ActiveTheme;
  41use ui::{KeyBinding, Tooltip, prelude::*, vertical_divider};
  42use util::{ResultExt as _, rel_path::RelPath};
  43use workspace::{
  44    CloseActiveItem, ItemNavHistory, SerializableItem, ToolbarItemEvent, ToolbarItemLocation,
  45    ToolbarItemView, Workspace,
  46    item::{Item, ItemEvent, ItemHandle, SaveOptions, TabContentParams},
  47    notifications::NotifyTaskExt,
  48    searchable::SearchableItemHandle,
  49};
  50use ztracing::instrument;
  51
  52actions!(
  53    git,
  54    [
  55        /// Shows the diff between the working directory and the index.
  56        Diff,
  57        /// Adds files to the git staging area.
  58        Add,
  59        /// Shows the diff between the working directory and your default
  60        /// branch (typically main or master).
  61        BranchDiff,
  62        LeaderAndFollower,
  63    ]
  64);
  65
  66pub struct ProjectDiff {
  67    project: Entity<Project>,
  68    multibuffer: Entity<MultiBuffer>,
  69    branch_diff: Entity<branch_diff::BranchDiff>,
  70    editor: Entity<SplittableEditor>,
  71    buffer_diff_subscriptions: HashMap<Arc<RelPath>, (Entity<BufferDiff>, Subscription)>,
  72    workspace: WeakEntity<Workspace>,
  73    focus_handle: FocusHandle,
  74    pending_scroll: Option<PathKey>,
  75    review_comment_count: usize,
  76    _task: Task<Result<()>>,
  77    _subscription: Subscription,
  78}
  79
  80#[derive(Clone, Copy, Debug, PartialEq, Eq)]
  81pub enum RefreshReason {
  82    DiffChanged,
  83    StatusesChanged,
  84    EditorSaved,
  85}
  86
  87const CONFLICT_SORT_PREFIX: u64 = 1;
  88const TRACKED_SORT_PREFIX: u64 = 2;
  89const NEW_SORT_PREFIX: u64 = 3;
  90
  91impl ProjectDiff {
  92    pub(crate) fn register(workspace: &mut Workspace, cx: &mut Context<Workspace>) {
  93        workspace.register_action(Self::deploy);
  94        workspace.register_action(Self::deploy_branch_diff);
  95        workspace.register_action(|workspace, _: &Add, window, cx| {
  96            Self::deploy(workspace, &Diff, window, cx);
  97        });
  98        workspace::register_serializable_item::<ProjectDiff>(cx);
  99    }
 100
 101    fn deploy(
 102        workspace: &mut Workspace,
 103        _: &Diff,
 104        window: &mut Window,
 105        cx: &mut Context<Workspace>,
 106    ) {
 107        Self::deploy_at(workspace, None, window, cx)
 108    }
 109
 110    fn deploy_branch_diff(
 111        workspace: &mut Workspace,
 112        _: &BranchDiff,
 113        window: &mut Window,
 114        cx: &mut Context<Workspace>,
 115    ) {
 116        telemetry::event!("Git Branch Diff Opened");
 117        let project = workspace.project().clone();
 118
 119        let existing = workspace
 120            .items_of_type::<Self>(cx)
 121            .find(|item| matches!(item.read(cx).diff_base(cx), DiffBase::Merge { .. }));
 122        if let Some(existing) = existing {
 123            workspace.activate_item(&existing, true, true, window, cx);
 124            return;
 125        }
 126        let workspace = cx.entity();
 127        let workspace_weak = workspace.downgrade();
 128        window
 129            .spawn(cx, async move |cx| {
 130                let this = cx
 131                    .update(|window, cx| {
 132                        Self::new_with_default_branch(project, workspace.clone(), window, cx)
 133                    })?
 134                    .await?;
 135                workspace
 136                    .update_in(cx, |workspace, window, cx| {
 137                        workspace.add_item_to_active_pane(Box::new(this), None, true, window, cx);
 138                    })
 139                    .ok();
 140                anyhow::Ok(())
 141            })
 142            .detach_and_notify_err(workspace_weak, window, cx);
 143    }
 144
 145    pub fn deploy_at(
 146        workspace: &mut Workspace,
 147        entry: Option<GitStatusEntry>,
 148        window: &mut Window,
 149        cx: &mut Context<Workspace>,
 150    ) {
 151        telemetry::event!(
 152            "Git Diff Opened",
 153            source = if entry.is_some() {
 154                "Git Panel"
 155            } else {
 156                "Action"
 157            }
 158        );
 159        let intended_repo = resolve_active_repository(workspace, cx);
 160
 161        let existing = workspace
 162            .items_of_type::<Self>(cx)
 163            .find(|item| matches!(item.read(cx).diff_base(cx), DiffBase::Head));
 164        let project_diff = if let Some(existing) = existing {
 165            existing.update(cx, |project_diff, cx| {
 166                project_diff.move_to_beginning(window, cx);
 167            });
 168
 169            workspace.activate_item(&existing, true, true, window, cx);
 170            existing
 171        } else {
 172            let workspace_handle = cx.entity();
 173            let project_diff =
 174                cx.new(|cx| Self::new(workspace.project().clone(), workspace_handle, window, cx));
 175            workspace.add_item_to_active_pane(
 176                Box::new(project_diff.clone()),
 177                None,
 178                true,
 179                window,
 180                cx,
 181            );
 182            project_diff
 183        };
 184
 185        if let Some(intended) = &intended_repo {
 186            let needs_switch = project_diff
 187                .read(cx)
 188                .branch_diff
 189                .read(cx)
 190                .repo()
 191                .map_or(true, |current| current.read(cx).id != intended.read(cx).id);
 192            if needs_switch {
 193                project_diff.update(cx, |project_diff, cx| {
 194                    project_diff.branch_diff.update(cx, |branch_diff, cx| {
 195                        branch_diff.set_repo(Some(intended.clone()), cx);
 196                    });
 197                });
 198            }
 199        }
 200
 201        if let Some(entry) = entry {
 202            project_diff.update(cx, |project_diff, cx| {
 203                project_diff.move_to_entry(entry, window, cx);
 204            })
 205        }
 206    }
 207
 208    pub fn deploy_at_project_path(
 209        workspace: &mut Workspace,
 210        project_path: ProjectPath,
 211        window: &mut Window,
 212        cx: &mut Context<Workspace>,
 213    ) {
 214        telemetry::event!("Git Diff Opened", source = "Agent Panel");
 215        let existing = workspace
 216            .items_of_type::<Self>(cx)
 217            .find(|item| matches!(item.read(cx).diff_base(cx), DiffBase::Head));
 218        let project_diff = if let Some(existing) = existing {
 219            workspace.activate_item(&existing, true, true, window, cx);
 220            existing
 221        } else {
 222            let workspace_handle = cx.entity();
 223            let project_diff =
 224                cx.new(|cx| Self::new(workspace.project().clone(), workspace_handle, window, cx));
 225            workspace.add_item_to_active_pane(
 226                Box::new(project_diff.clone()),
 227                None,
 228                true,
 229                window,
 230                cx,
 231            );
 232            project_diff
 233        };
 234        project_diff.update(cx, |project_diff, cx| {
 235            project_diff.move_to_project_path(&project_path, window, cx);
 236        });
 237    }
 238
 239    pub fn autoscroll(&self, cx: &mut Context<Self>) {
 240        self.editor.update(cx, |editor, cx| {
 241            editor.rhs_editor().update(cx, |editor, cx| {
 242                editor.request_autoscroll(Autoscroll::fit(), cx);
 243            })
 244        })
 245    }
 246
 247    fn new_with_default_branch(
 248        project: Entity<Project>,
 249        workspace: Entity<Workspace>,
 250        window: &mut Window,
 251        cx: &mut App,
 252    ) -> Task<Result<Entity<Self>>> {
 253        let Some(repo) = project.read(cx).git_store().read(cx).active_repository() else {
 254            return Task::ready(Err(anyhow!("No active repository")));
 255        };
 256        let main_branch = repo.update(cx, |repo, _| repo.default_branch(true));
 257        window.spawn(cx, async move |cx| {
 258            let main_branch = main_branch
 259                .await??
 260                .context("Could not determine default branch")?;
 261
 262            let branch_diff = cx.new_window_entity(|window, cx| {
 263                branch_diff::BranchDiff::new(
 264                    DiffBase::Merge {
 265                        base_ref: main_branch,
 266                    },
 267                    project.clone(),
 268                    window,
 269                    cx,
 270                )
 271            })?;
 272            cx.new_window_entity(|window, cx| {
 273                Self::new_impl(branch_diff, project, workspace, window, cx)
 274            })
 275        })
 276    }
 277
 278    fn new(
 279        project: Entity<Project>,
 280        workspace: Entity<Workspace>,
 281        window: &mut Window,
 282        cx: &mut Context<Self>,
 283    ) -> Self {
 284        let branch_diff =
 285            cx.new(|cx| branch_diff::BranchDiff::new(DiffBase::Head, project.clone(), window, cx));
 286        Self::new_impl(branch_diff, project, workspace, window, cx)
 287    }
 288
 289    fn new_impl(
 290        branch_diff: Entity<branch_diff::BranchDiff>,
 291        project: Entity<Project>,
 292        workspace: Entity<Workspace>,
 293        window: &mut Window,
 294        cx: &mut Context<Self>,
 295    ) -> Self {
 296        let focus_handle = cx.focus_handle();
 297        let multibuffer = cx.new(|cx| {
 298            let mut multibuffer = MultiBuffer::new(Capability::ReadWrite);
 299            multibuffer.set_all_diff_hunks_expanded(cx);
 300            multibuffer
 301        });
 302
 303        let editor = cx.new(|cx| {
 304            let diff_display_editor = SplittableEditor::new(
 305                EditorSettings::get_global(cx).diff_view_style,
 306                multibuffer.clone(),
 307                project.clone(),
 308                workspace.clone(),
 309                window,
 310                cx,
 311            );
 312            match branch_diff.read(cx).diff_base() {
 313                DiffBase::Head => {}
 314                DiffBase::Merge { .. } => diff_display_editor.set_render_diff_hunk_controls(
 315                    Arc::new(|_, _, _, _, _, _, _, _| gpui::Empty.into_any_element()),
 316                    cx,
 317                ),
 318            }
 319            diff_display_editor.rhs_editor().update(cx, |editor, cx| {
 320                editor.disable_diagnostics(cx);
 321                editor.set_show_diff_review_button(true, cx);
 322
 323                match branch_diff.read(cx).diff_base() {
 324                    DiffBase::Head => {
 325                        editor.register_addon(GitPanelAddon {
 326                            workspace: workspace.downgrade(),
 327                        });
 328                    }
 329                    DiffBase::Merge { .. } => {
 330                        editor.register_addon(BranchDiffAddon {
 331                            branch_diff: branch_diff.clone(),
 332                        });
 333                        editor.start_temporary_diff_override();
 334                    }
 335                }
 336            });
 337            diff_display_editor
 338        });
 339        let editor_subscription = cx.subscribe_in(&editor, window, Self::handle_editor_event);
 340
 341        let primary_editor = editor.read(cx).rhs_editor().clone();
 342        let review_comment_subscription =
 343            cx.subscribe(&primary_editor, |this, _editor, event: &EditorEvent, cx| {
 344                if let EditorEvent::ReviewCommentsChanged { total_count } = event {
 345                    this.review_comment_count = *total_count;
 346                    cx.notify();
 347                }
 348            });
 349
 350        let branch_diff_subscription = cx.subscribe_in(
 351            &branch_diff,
 352            window,
 353            move |this, _git_store, event, window, cx| match event {
 354                BranchDiffEvent::FileListChanged => {
 355                    this._task = window.spawn(cx, {
 356                        let this = cx.weak_entity();
 357                        async |cx| Self::refresh(this, RefreshReason::StatusesChanged, cx).await
 358                    })
 359                }
 360            },
 361        );
 362
 363        let mut was_sort_by_path = GitPanelSettings::get_global(cx).sort_by_path;
 364        let mut was_collapse_untracked_diff =
 365            GitPanelSettings::get_global(cx).collapse_untracked_diff;
 366        cx.observe_global_in::<SettingsStore>(window, move |this, window, cx| {
 367            let is_sort_by_path = GitPanelSettings::get_global(cx).sort_by_path;
 368            let is_collapse_untracked_diff =
 369                GitPanelSettings::get_global(cx).collapse_untracked_diff;
 370            if is_sort_by_path != was_sort_by_path
 371                || is_collapse_untracked_diff != was_collapse_untracked_diff
 372            {
 373                this._task = {
 374                    window.spawn(cx, {
 375                        let this = cx.weak_entity();
 376                        async |cx| Self::refresh(this, RefreshReason::StatusesChanged, cx).await
 377                    })
 378                }
 379            }
 380            was_sort_by_path = is_sort_by_path;
 381            was_collapse_untracked_diff = is_collapse_untracked_diff;
 382        })
 383        .detach();
 384
 385        let task = window.spawn(cx, {
 386            let this = cx.weak_entity();
 387            async |cx| Self::refresh(this, RefreshReason::StatusesChanged, cx).await
 388        });
 389
 390        Self {
 391            project,
 392            workspace: workspace.downgrade(),
 393            branch_diff,
 394            focus_handle,
 395            editor,
 396            multibuffer,
 397            buffer_diff_subscriptions: Default::default(),
 398            pending_scroll: None,
 399            review_comment_count: 0,
 400            _task: task,
 401            _subscription: Subscription::join(
 402                branch_diff_subscription,
 403                Subscription::join(editor_subscription, review_comment_subscription),
 404            ),
 405        }
 406    }
 407
 408    pub fn diff_base<'a>(&'a self, cx: &'a App) -> &'a DiffBase {
 409        self.branch_diff.read(cx).diff_base()
 410    }
 411
 412    pub fn move_to_entry(
 413        &mut self,
 414        entry: GitStatusEntry,
 415        window: &mut Window,
 416        cx: &mut Context<Self>,
 417    ) {
 418        let Some(git_repo) = self.branch_diff.read(cx).repo() else {
 419            return;
 420        };
 421        let repo = git_repo.read(cx);
 422        let sort_prefix = sort_prefix(repo, &entry.repo_path, entry.status, cx);
 423        let path_key = PathKey::with_sort_prefix(sort_prefix, entry.repo_path.as_ref().clone());
 424
 425        self.move_to_path(path_key, window, cx)
 426    }
 427
 428    pub fn move_to_project_path(
 429        &mut self,
 430        project_path: &ProjectPath,
 431        window: &mut Window,
 432        cx: &mut Context<Self>,
 433    ) {
 434        let Some(git_repo) = self.branch_diff.read(cx).repo() else {
 435            return;
 436        };
 437        let Some(repo_path) = git_repo
 438            .read(cx)
 439            .project_path_to_repo_path(project_path, cx)
 440        else {
 441            return;
 442        };
 443        let status = git_repo
 444            .read(cx)
 445            .status_for_path(&repo_path)
 446            .map(|entry| entry.status)
 447            .unwrap_or(FileStatus::Untracked);
 448        let sort_prefix = sort_prefix(&git_repo.read(cx), &repo_path, status, cx);
 449        let path_key = PathKey::with_sort_prefix(sort_prefix, repo_path.as_ref().clone());
 450        self.move_to_path(path_key, window, cx)
 451    }
 452
 453    pub fn active_path(&self, cx: &App) -> Option<ProjectPath> {
 454        let editor = self.editor.read(cx).last_selected_editor().read(cx);
 455        let position = editor.selections.newest_anchor().head();
 456        let multi_buffer = editor.buffer().read(cx);
 457        let (_, buffer, _) = multi_buffer.excerpt_containing(position, cx)?;
 458
 459        let file = buffer.read(cx).file()?;
 460        Some(ProjectPath {
 461            worktree_id: file.worktree_id(cx),
 462            path: file.path().clone(),
 463        })
 464    }
 465
 466    fn move_to_beginning(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 467        self.editor.update(cx, |editor, cx| {
 468            editor.rhs_editor().update(cx, |editor, cx| {
 469                editor.move_to_beginning(&Default::default(), window, cx);
 470            });
 471        });
 472    }
 473
 474    fn move_to_path(&mut self, path_key: PathKey, window: &mut Window, cx: &mut Context<Self>) {
 475        if let Some(position) = self.multibuffer.read(cx).location_for_path(&path_key, cx) {
 476            self.editor.update(cx, |editor, cx| {
 477                editor.rhs_editor().update(cx, |editor, cx| {
 478                    editor.change_selections(
 479                        SelectionEffects::scroll(Autoscroll::focused()),
 480                        window,
 481                        cx,
 482                        |s| {
 483                            s.select_ranges([position..position]);
 484                        },
 485                    )
 486                })
 487            });
 488        } else {
 489            self.pending_scroll = Some(path_key);
 490        }
 491    }
 492
 493    /// Returns the total count of review comments across all hunks/files.
 494    pub fn total_review_comment_count(&self) -> usize {
 495        self.review_comment_count
 496    }
 497
 498    /// Returns a reference to the splittable editor.
 499    pub fn editor(&self) -> &Entity<SplittableEditor> {
 500        &self.editor
 501    }
 502
 503    fn button_states(&self, cx: &App) -> ButtonStates {
 504        let editor = self.editor.read(cx).rhs_editor().read(cx);
 505        let snapshot = self.multibuffer.read(cx).snapshot(cx);
 506        let prev_next = snapshot.diff_hunks().nth(1).is_some();
 507        let mut selection = true;
 508
 509        let mut ranges = editor
 510            .selections
 511            .disjoint_anchor_ranges()
 512            .collect::<Vec<_>>();
 513        if !ranges.iter().any(|range| range.start != range.end) {
 514            selection = false;
 515            if let Some((excerpt_id, _, range)) = self
 516                .editor
 517                .read(cx)
 518                .rhs_editor()
 519                .read(cx)
 520                .active_excerpt(cx)
 521            {
 522                ranges = vec![multi_buffer::Anchor::range_in_buffer(excerpt_id, range)];
 523            } else {
 524                ranges = Vec::default();
 525            }
 526        }
 527        let mut has_staged_hunks = false;
 528        let mut has_unstaged_hunks = false;
 529        for hunk in editor.diff_hunks_in_ranges(&ranges, &snapshot) {
 530            match hunk.status.secondary {
 531                DiffHunkSecondaryStatus::HasSecondaryHunk
 532                | DiffHunkSecondaryStatus::SecondaryHunkAdditionPending => {
 533                    has_unstaged_hunks = true;
 534                }
 535                DiffHunkSecondaryStatus::OverlapsWithSecondaryHunk => {
 536                    has_staged_hunks = true;
 537                    has_unstaged_hunks = true;
 538                }
 539                DiffHunkSecondaryStatus::NoSecondaryHunk
 540                | DiffHunkSecondaryStatus::SecondaryHunkRemovalPending => {
 541                    has_staged_hunks = true;
 542                }
 543            }
 544        }
 545        let mut stage_all = false;
 546        let mut unstage_all = false;
 547        self.workspace
 548            .read_with(cx, |workspace, cx| {
 549                if let Some(git_panel) = workspace.panel::<GitPanel>(cx) {
 550                    let git_panel = git_panel.read(cx);
 551                    stage_all = git_panel.can_stage_all();
 552                    unstage_all = git_panel.can_unstage_all();
 553                }
 554            })
 555            .ok();
 556
 557        ButtonStates {
 558            stage: has_unstaged_hunks,
 559            unstage: has_staged_hunks,
 560            prev_next,
 561            selection,
 562            stage_all,
 563            unstage_all,
 564        }
 565    }
 566
 567    fn handle_editor_event(
 568        &mut self,
 569        editor: &Entity<SplittableEditor>,
 570        event: &EditorEvent,
 571        window: &mut Window,
 572        cx: &mut Context<Self>,
 573    ) {
 574        match event {
 575            EditorEvent::SelectionsChanged { local: true } => {
 576                let Some(project_path) = self.active_path(cx) else {
 577                    return;
 578                };
 579                self.workspace
 580                    .update(cx, |workspace, cx| {
 581                        if let Some(git_panel) = workspace.panel::<GitPanel>(cx) {
 582                            git_panel.update(cx, |git_panel, cx| {
 583                                git_panel.select_entry_by_path(project_path, window, cx)
 584                            })
 585                        }
 586                    })
 587                    .ok();
 588            }
 589            EditorEvent::Saved => {
 590                self._task = cx.spawn_in(window, async move |this, cx| {
 591                    Self::refresh(this, RefreshReason::EditorSaved, cx).await
 592                });
 593            }
 594            _ => {}
 595        }
 596        if editor.focus_handle(cx).contains_focused(window, cx)
 597            && self.multibuffer.read(cx).is_empty()
 598        {
 599            self.focus_handle.focus(window, cx)
 600        }
 601    }
 602
 603    #[instrument(skip_all)]
 604    fn register_buffer(
 605        &mut self,
 606        path_key: PathKey,
 607        file_status: FileStatus,
 608        buffer: Entity<Buffer>,
 609        diff: Entity<BufferDiff>,
 610        window: &mut Window,
 611        cx: &mut Context<Self>,
 612    ) {
 613        let subscription = cx.subscribe_in(&diff, window, move |this, _, _, window, cx| {
 614            this._task = window.spawn(cx, {
 615                let this = cx.weak_entity();
 616                async |cx| Self::refresh(this, RefreshReason::DiffChanged, cx).await
 617            })
 618        });
 619        self.buffer_diff_subscriptions
 620            .insert(path_key.path.clone(), (diff.clone(), subscription));
 621
 622        // TODO(split-diff) we shouldn't have a conflict addon when split
 623        let conflict_addon = self
 624            .editor
 625            .read(cx)
 626            .rhs_editor()
 627            .read(cx)
 628            .addon::<ConflictAddon>()
 629            .expect("project diff editor should have a conflict addon");
 630
 631        let snapshot = buffer.read(cx).snapshot();
 632        let diff_snapshot = diff.read(cx).snapshot(cx);
 633
 634        let excerpt_ranges = {
 635            let diff_hunk_ranges = diff_snapshot
 636                .hunks_intersecting_range(
 637                    Anchor::min_max_range_for_buffer(snapshot.remote_id()),
 638                    &snapshot,
 639                )
 640                .map(|diff_hunk| diff_hunk.buffer_range.to_point(&snapshot));
 641            let conflicts = conflict_addon
 642                .conflict_set(snapshot.remote_id())
 643                .map(|conflict_set| conflict_set.read(cx).snapshot().conflicts)
 644                .unwrap_or_default();
 645            let mut conflicts = conflicts
 646                .iter()
 647                .map(|conflict| conflict.range.to_point(&snapshot))
 648                .peekable();
 649
 650            if conflicts.peek().is_some() {
 651                conflicts.collect::<Vec<_>>()
 652            } else {
 653                diff_hunk_ranges.collect()
 654            }
 655        };
 656
 657        let (was_empty, is_excerpt_newly_added) = self.editor.update(cx, |editor, cx| {
 658            let was_empty = editor.rhs_editor().read(cx).buffer().read(cx).is_empty();
 659            let (_, is_newly_added) = editor.set_excerpts_for_path(
 660                path_key.clone(),
 661                buffer,
 662                excerpt_ranges,
 663                multibuffer_context_lines(cx),
 664                diff,
 665                cx,
 666            );
 667            (was_empty, is_newly_added)
 668        });
 669
 670        self.editor.update(cx, |editor, cx| {
 671            editor.rhs_editor().update(cx, |editor, cx| {
 672                if was_empty {
 673                    editor.change_selections(
 674                        SelectionEffects::no_scroll(),
 675                        window,
 676                        cx,
 677                        |selections| {
 678                            selections.select_ranges([
 679                                multi_buffer::Anchor::min()..multi_buffer::Anchor::min()
 680                            ])
 681                        },
 682                    );
 683                }
 684                if is_excerpt_newly_added
 685                    && (file_status.is_deleted()
 686                        || (file_status.is_untracked()
 687                            && GitPanelSettings::get_global(cx).collapse_untracked_diff))
 688                {
 689                    editor.fold_buffer(snapshot.text.remote_id(), cx)
 690                }
 691            })
 692        });
 693
 694        if self.multibuffer.read(cx).is_empty()
 695            && self
 696                .editor
 697                .read(cx)
 698                .focus_handle(cx)
 699                .contains_focused(window, cx)
 700        {
 701            self.focus_handle.focus(window, cx);
 702        } else if self.focus_handle.is_focused(window) && !self.multibuffer.read(cx).is_empty() {
 703            self.editor.update(cx, |editor, cx| {
 704                editor.focus_handle(cx).focus(window, cx);
 705            });
 706        }
 707        if self.pending_scroll.as_ref() == Some(&path_key) {
 708            self.move_to_path(path_key, window, cx);
 709        }
 710    }
 711
 712    #[instrument(skip_all)]
 713    pub async fn refresh(
 714        this: WeakEntity<Self>,
 715        reason: RefreshReason,
 716        cx: &mut AsyncWindowContext,
 717    ) -> Result<()> {
 718        let mut path_keys = Vec::new();
 719        let buffers_to_load = this.update(cx, |this, cx| {
 720            let (repo, buffers_to_load) = this.branch_diff.update(cx, |branch_diff, cx| {
 721                let load_buffers = branch_diff.load_buffers(cx);
 722                (branch_diff.repo().cloned(), load_buffers)
 723            });
 724            let mut previous_paths = this
 725                .multibuffer
 726                .read(cx)
 727                .paths()
 728                .cloned()
 729                .collect::<HashSet<_>>();
 730
 731            if let Some(repo) = repo {
 732                let repo = repo.read(cx);
 733
 734                path_keys = Vec::with_capacity(buffers_to_load.len());
 735                for entry in buffers_to_load.iter() {
 736                    let sort_prefix = sort_prefix(&repo, &entry.repo_path, entry.file_status, cx);
 737                    let path_key =
 738                        PathKey::with_sort_prefix(sort_prefix, entry.repo_path.as_ref().clone());
 739                    previous_paths.remove(&path_key);
 740                    path_keys.push(path_key)
 741                }
 742            }
 743
 744            this.editor.update(cx, |editor, cx| {
 745                for path in previous_paths {
 746                    if let Some(buffer) = this.multibuffer.read(cx).buffer_for_path(&path, cx) {
 747                        let skip = match reason {
 748                            RefreshReason::DiffChanged | RefreshReason::EditorSaved => {
 749                                buffer.read(cx).is_dirty()
 750                            }
 751                            RefreshReason::StatusesChanged => false,
 752                        };
 753                        if skip {
 754                            continue;
 755                        }
 756                    }
 757
 758                    this.buffer_diff_subscriptions.remove(&path.path);
 759                    editor.remove_excerpts_for_path(path, cx);
 760                }
 761            });
 762            buffers_to_load
 763        })?;
 764
 765        for (entry, path_key) in buffers_to_load.into_iter().zip(path_keys.into_iter()) {
 766            if let Some((buffer, diff)) = entry.load.await.log_err() {
 767                // We might be lagging behind enough that all future entry.load futures are no longer pending.
 768                // If that is the case, this task will never yield, starving the foreground thread of execution time.
 769                yield_now().await;
 770                cx.update(|window, cx| {
 771                    this.update(cx, |this, cx| {
 772                        let multibuffer = this.multibuffer.read(cx);
 773                        let skip = multibuffer.buffer(buffer.read(cx).remote_id()).is_some()
 774                            && multibuffer
 775                                .diff_for(buffer.read(cx).remote_id())
 776                                .is_some_and(|prev_diff| prev_diff.entity_id() == diff.entity_id())
 777                            && match reason {
 778                                RefreshReason::DiffChanged | RefreshReason::EditorSaved => {
 779                                    buffer.read(cx).is_dirty()
 780                                }
 781                                RefreshReason::StatusesChanged => false,
 782                            };
 783                        if !skip {
 784                            this.register_buffer(
 785                                path_key,
 786                                entry.file_status,
 787                                buffer,
 788                                diff,
 789                                window,
 790                                cx,
 791                            )
 792                        }
 793                    })
 794                    .ok();
 795                })?;
 796            }
 797        }
 798        this.update(cx, |this, cx| {
 799            this.pending_scroll.take();
 800            cx.notify();
 801        })?;
 802
 803        Ok(())
 804    }
 805
 806    #[cfg(any(test, feature = "test-support"))]
 807    pub fn excerpt_paths(&self, cx: &App) -> Vec<std::sync::Arc<util::rel_path::RelPath>> {
 808        self.multibuffer
 809            .read(cx)
 810            .paths()
 811            .map(|key| key.path.clone())
 812            .collect()
 813    }
 814}
 815
 816fn sort_prefix(repo: &Repository, repo_path: &RepoPath, status: FileStatus, cx: &App) -> u64 {
 817    let settings = GitPanelSettings::get_global(cx);
 818
 819    if settings.sort_by_path && !settings.tree_view {
 820        TRACKED_SORT_PREFIX
 821    } else if repo.had_conflict_on_last_merge_head_change(repo_path) {
 822        CONFLICT_SORT_PREFIX
 823    } else if status.is_created() {
 824        NEW_SORT_PREFIX
 825    } else {
 826        TRACKED_SORT_PREFIX
 827    }
 828}
 829
 830impl EventEmitter<EditorEvent> for ProjectDiff {}
 831
 832impl Focusable for ProjectDiff {
 833    fn focus_handle(&self, cx: &App) -> FocusHandle {
 834        if self.multibuffer.read(cx).is_empty() {
 835            self.focus_handle.clone()
 836        } else {
 837            self.editor.focus_handle(cx)
 838        }
 839    }
 840}
 841
 842impl Item for ProjectDiff {
 843    type Event = EditorEvent;
 844
 845    fn tab_icon(&self, _window: &Window, _cx: &App) -> Option<Icon> {
 846        Some(Icon::new(IconName::GitBranch).color(Color::Muted))
 847    }
 848
 849    fn to_item_events(event: &EditorEvent, f: impl FnMut(ItemEvent)) {
 850        Editor::to_item_events(event, f)
 851    }
 852
 853    fn deactivated(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 854        self.editor.update(cx, |editor, cx| {
 855            editor.rhs_editor().update(cx, |primary_editor, cx| {
 856                primary_editor.deactivated(window, cx);
 857            })
 858        });
 859    }
 860
 861    fn navigate(
 862        &mut self,
 863        data: Arc<dyn Any + Send>,
 864        window: &mut Window,
 865        cx: &mut Context<Self>,
 866    ) -> bool {
 867        self.editor.update(cx, |editor, cx| {
 868            editor.rhs_editor().update(cx, |primary_editor, cx| {
 869                primary_editor.navigate(data, window, cx)
 870            })
 871        })
 872    }
 873
 874    fn tab_tooltip_text(&self, _: &App) -> Option<SharedString> {
 875        Some("Project Diff".into())
 876    }
 877
 878    fn tab_content(&self, params: TabContentParams, _window: &Window, cx: &App) -> AnyElement {
 879        Label::new(self.tab_content_text(0, cx))
 880            .color(if params.selected {
 881                Color::Default
 882            } else {
 883                Color::Muted
 884            })
 885            .into_any_element()
 886    }
 887
 888    fn tab_content_text(&self, _detail: usize, cx: &App) -> SharedString {
 889        match self.branch_diff.read(cx).diff_base() {
 890            DiffBase::Head => "Uncommitted Changes".into(),
 891            DiffBase::Merge { base_ref } => format!("Changes since {}", base_ref).into(),
 892        }
 893    }
 894
 895    fn telemetry_event_text(&self) -> Option<&'static str> {
 896        Some("Project Diff Opened")
 897    }
 898
 899    fn as_searchable(&self, _: &Entity<Self>, _cx: &App) -> Option<Box<dyn SearchableItemHandle>> {
 900        Some(Box::new(self.editor.clone()))
 901    }
 902
 903    fn for_each_project_item(
 904        &self,
 905        cx: &App,
 906        f: &mut dyn FnMut(gpui::EntityId, &dyn project::ProjectItem),
 907    ) {
 908        self.editor
 909            .read(cx)
 910            .rhs_editor()
 911            .read(cx)
 912            .for_each_project_item(cx, f)
 913    }
 914
 915    fn set_nav_history(
 916        &mut self,
 917        nav_history: ItemNavHistory,
 918        _: &mut Window,
 919        cx: &mut Context<Self>,
 920    ) {
 921        self.editor.update(cx, |editor, cx| {
 922            editor.rhs_editor().update(cx, |primary_editor, _| {
 923                primary_editor.set_nav_history(Some(nav_history));
 924            })
 925        });
 926    }
 927
 928    fn can_split(&self) -> bool {
 929        true
 930    }
 931
 932    fn clone_on_split(
 933        &self,
 934        _workspace_id: Option<workspace::WorkspaceId>,
 935        window: &mut Window,
 936        cx: &mut Context<Self>,
 937    ) -> Task<Option<Entity<Self>>>
 938    where
 939        Self: Sized,
 940    {
 941        let Some(workspace) = self.workspace.upgrade() else {
 942            return Task::ready(None);
 943        };
 944        Task::ready(Some(cx.new(|cx| {
 945            ProjectDiff::new(self.project.clone(), workspace, window, cx)
 946        })))
 947    }
 948
 949    fn is_dirty(&self, cx: &App) -> bool {
 950        self.multibuffer.read(cx).is_dirty(cx)
 951    }
 952
 953    fn has_conflict(&self, cx: &App) -> bool {
 954        self.multibuffer.read(cx).has_conflict(cx)
 955    }
 956
 957    fn can_save(&self, _: &App) -> bool {
 958        true
 959    }
 960
 961    fn save(
 962        &mut self,
 963        options: SaveOptions,
 964        project: Entity<Project>,
 965        window: &mut Window,
 966        cx: &mut Context<Self>,
 967    ) -> Task<Result<()>> {
 968        self.editor.update(cx, |editor, cx| {
 969            editor.rhs_editor().update(cx, |primary_editor, cx| {
 970                primary_editor.save(options, project, window, cx)
 971            })
 972        })
 973    }
 974
 975    fn save_as(
 976        &mut self,
 977        _: Entity<Project>,
 978        _: ProjectPath,
 979        _window: &mut Window,
 980        _: &mut Context<Self>,
 981    ) -> Task<Result<()>> {
 982        unreachable!()
 983    }
 984
 985    fn reload(
 986        &mut self,
 987        project: Entity<Project>,
 988        window: &mut Window,
 989        cx: &mut Context<Self>,
 990    ) -> Task<Result<()>> {
 991        self.editor.update(cx, |editor, cx| {
 992            editor.rhs_editor().update(cx, |primary_editor, cx| {
 993                primary_editor.reload(project, window, cx)
 994            })
 995        })
 996    }
 997
 998    fn act_as_type<'a>(
 999        &'a self,
1000        type_id: TypeId,
1001        self_handle: &'a Entity<Self>,
1002        cx: &'a App,
1003    ) -> Option<gpui::AnyEntity> {
1004        if type_id == TypeId::of::<Self>() {
1005            Some(self_handle.clone().into())
1006        } else if type_id == TypeId::of::<Editor>() {
1007            Some(self.editor.read(cx).rhs_editor().clone().into())
1008        } else if type_id == TypeId::of::<SplittableEditor>() {
1009            Some(self.editor.clone().into())
1010        } else {
1011            None
1012        }
1013    }
1014
1015    fn added_to_workspace(
1016        &mut self,
1017        workspace: &mut Workspace,
1018        window: &mut Window,
1019        cx: &mut Context<Self>,
1020    ) {
1021        self.editor.update(cx, |editor, cx| {
1022            editor.added_to_workspace(workspace, window, cx)
1023        });
1024    }
1025}
1026
1027impl Render for ProjectDiff {
1028    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
1029        let is_empty = self.multibuffer.read(cx).is_empty();
1030
1031        div()
1032            .track_focus(&self.focus_handle)
1033            .key_context(if is_empty { "EmptyPane" } else { "GitDiff" })
1034            .bg(cx.theme().colors().editor_background)
1035            .flex()
1036            .items_center()
1037            .justify_center()
1038            .size_full()
1039            .when(is_empty, |el| {
1040                let remote_button = if let Some(panel) = self
1041                    .workspace
1042                    .upgrade()
1043                    .and_then(|workspace| workspace.read(cx).panel::<GitPanel>(cx))
1044                {
1045                    panel.update(cx, |panel, cx| panel.render_remote_button(cx))
1046                } else {
1047                    None
1048                };
1049                let keybinding_focus_handle = self.focus_handle(cx);
1050                el.child(
1051                    v_flex()
1052                        .gap_1()
1053                        .child(
1054                            h_flex()
1055                                .justify_around()
1056                                .child(Label::new("No uncommitted changes")),
1057                        )
1058                        .map(|el| match remote_button {
1059                            Some(button) => el.child(h_flex().justify_around().child(button)),
1060                            None => el.child(
1061                                h_flex()
1062                                    .justify_around()
1063                                    .child(Label::new("Remote up to date")),
1064                            ),
1065                        })
1066                        .child(
1067                            h_flex().justify_around().mt_1().child(
1068                                Button::new("project-diff-close-button", "Close")
1069                                    // .style(ButtonStyle::Transparent)
1070                                    .key_binding(KeyBinding::for_action_in(
1071                                        &CloseActiveItem::default(),
1072                                        &keybinding_focus_handle,
1073                                        cx,
1074                                    ))
1075                                    .on_click(move |_, window, cx| {
1076                                        window.focus(&keybinding_focus_handle, cx);
1077                                        window.dispatch_action(
1078                                            Box::new(CloseActiveItem::default()),
1079                                            cx,
1080                                        );
1081                                    }),
1082                            ),
1083                        ),
1084                )
1085            })
1086            .when(!is_empty, |el| el.child(self.editor.clone()))
1087    }
1088}
1089
1090impl SerializableItem for ProjectDiff {
1091    fn serialized_item_kind() -> &'static str {
1092        "ProjectDiff"
1093    }
1094
1095    fn cleanup(
1096        _: workspace::WorkspaceId,
1097        _: Vec<workspace::ItemId>,
1098        _: &mut Window,
1099        _: &mut App,
1100    ) -> Task<Result<()>> {
1101        Task::ready(Ok(()))
1102    }
1103
1104    fn deserialize(
1105        project: Entity<Project>,
1106        workspace: WeakEntity<Workspace>,
1107        workspace_id: workspace::WorkspaceId,
1108        item_id: workspace::ItemId,
1109        window: &mut Window,
1110        cx: &mut App,
1111    ) -> Task<Result<Entity<Self>>> {
1112        window.spawn(cx, async move |cx| {
1113            let diff_base = persistence::PROJECT_DIFF_DB.get_diff_base(item_id, workspace_id)?;
1114
1115            let diff = cx.update(|window, cx| {
1116                let branch_diff = cx
1117                    .new(|cx| branch_diff::BranchDiff::new(diff_base, project.clone(), window, cx));
1118                let workspace = workspace.upgrade().context("workspace gone")?;
1119                anyhow::Ok(
1120                    cx.new(|cx| ProjectDiff::new_impl(branch_diff, project, workspace, window, cx)),
1121                )
1122            })??;
1123
1124            Ok(diff)
1125        })
1126    }
1127
1128    fn serialize(
1129        &mut self,
1130        workspace: &mut Workspace,
1131        item_id: workspace::ItemId,
1132        _closing: bool,
1133        _window: &mut Window,
1134        cx: &mut Context<Self>,
1135    ) -> Option<Task<Result<()>>> {
1136        let workspace_id = workspace.database_id()?;
1137        let diff_base = self.diff_base(cx).clone();
1138
1139        Some(cx.background_spawn({
1140            async move {
1141                persistence::PROJECT_DIFF_DB
1142                    .save_diff_base(item_id, workspace_id, diff_base.clone())
1143                    .await
1144            }
1145        }))
1146    }
1147
1148    fn should_serialize(&self, _: &Self::Event) -> bool {
1149        false
1150    }
1151}
1152
1153mod persistence {
1154
1155    use anyhow::Context as _;
1156    use db::{
1157        sqlez::{domain::Domain, thread_safe_connection::ThreadSafeConnection},
1158        sqlez_macros::sql,
1159    };
1160    use project::git_store::branch_diff::DiffBase;
1161    use workspace::{ItemId, WorkspaceDb, WorkspaceId};
1162
1163    pub struct ProjectDiffDb(ThreadSafeConnection);
1164
1165    impl Domain for ProjectDiffDb {
1166        const NAME: &str = stringify!(ProjectDiffDb);
1167
1168        const MIGRATIONS: &[&str] = &[sql!(
1169                CREATE TABLE project_diffs(
1170                    workspace_id INTEGER,
1171                    item_id INTEGER UNIQUE,
1172
1173                    diff_base TEXT,
1174
1175                    PRIMARY KEY(workspace_id, item_id),
1176                    FOREIGN KEY(workspace_id) REFERENCES workspaces(workspace_id)
1177                    ON DELETE CASCADE
1178                ) STRICT;
1179        )];
1180    }
1181
1182    db::static_connection!(PROJECT_DIFF_DB, ProjectDiffDb, [WorkspaceDb]);
1183
1184    impl ProjectDiffDb {
1185        pub async fn save_diff_base(
1186            &self,
1187            item_id: ItemId,
1188            workspace_id: WorkspaceId,
1189            diff_base: DiffBase,
1190        ) -> anyhow::Result<()> {
1191            self.write(move |connection| {
1192                let sql_stmt = sql!(
1193                    INSERT OR REPLACE INTO project_diffs(item_id, workspace_id, diff_base) VALUES (?, ?, ?)
1194                );
1195                let diff_base_str = serde_json::to_string(&diff_base)?;
1196                let mut query = connection.exec_bound::<(ItemId, WorkspaceId, String)>(sql_stmt)?;
1197                query((item_id, workspace_id, diff_base_str)).context(format!(
1198                    "exec_bound failed to execute or parse for: {}",
1199                    sql_stmt
1200                ))
1201            })
1202            .await
1203        }
1204
1205        pub fn get_diff_base(
1206            &self,
1207            item_id: ItemId,
1208            workspace_id: WorkspaceId,
1209        ) -> anyhow::Result<DiffBase> {
1210            let sql_stmt =
1211                sql!(SELECT diff_base FROM project_diffs WHERE item_id =  ?AND workspace_id =  ?);
1212            let diff_base_str = self.select_row_bound::<(ItemId, WorkspaceId), String>(sql_stmt)?(
1213                (item_id, workspace_id),
1214            )
1215            .context(::std::format!(
1216                "Error in get_diff_base, select_row_bound failed to execute or parse for: {}",
1217                sql_stmt
1218            ))?;
1219            let Some(diff_base_str) = diff_base_str else {
1220                return Ok(DiffBase::Head);
1221            };
1222            serde_json::from_str(&diff_base_str).context("deserializing diff base")
1223        }
1224    }
1225}
1226
1227pub struct ProjectDiffToolbar {
1228    project_diff: Option<WeakEntity<ProjectDiff>>,
1229    workspace: WeakEntity<Workspace>,
1230}
1231
1232impl ProjectDiffToolbar {
1233    pub fn new(workspace: &Workspace, _: &mut Context<Self>) -> Self {
1234        Self {
1235            project_diff: None,
1236            workspace: workspace.weak_handle(),
1237        }
1238    }
1239
1240    fn project_diff(&self, _: &App) -> Option<Entity<ProjectDiff>> {
1241        self.project_diff.as_ref()?.upgrade()
1242    }
1243
1244    fn dispatch_action(&self, action: &dyn Action, window: &mut Window, cx: &mut Context<Self>) {
1245        if let Some(project_diff) = self.project_diff(cx) {
1246            project_diff.focus_handle(cx).focus(window, cx);
1247        }
1248        let action = action.boxed_clone();
1249        cx.defer(move |cx| {
1250            cx.dispatch_action(action.as_ref());
1251        })
1252    }
1253
1254    fn stage_all(&mut self, window: &mut Window, cx: &mut Context<Self>) {
1255        self.workspace
1256            .update(cx, |workspace, cx| {
1257                if let Some(panel) = workspace.panel::<GitPanel>(cx) {
1258                    panel.update(cx, |panel, cx| {
1259                        panel.stage_all(&Default::default(), window, cx);
1260                    });
1261                }
1262            })
1263            .ok();
1264    }
1265
1266    fn unstage_all(&mut self, window: &mut Window, cx: &mut Context<Self>) {
1267        self.workspace
1268            .update(cx, |workspace, cx| {
1269                let Some(panel) = workspace.panel::<GitPanel>(cx) else {
1270                    return;
1271                };
1272                panel.update(cx, |panel, cx| {
1273                    panel.unstage_all(&Default::default(), window, cx);
1274                });
1275            })
1276            .ok();
1277    }
1278}
1279
1280impl EventEmitter<ToolbarItemEvent> for ProjectDiffToolbar {}
1281
1282impl ToolbarItemView for ProjectDiffToolbar {
1283    fn set_active_pane_item(
1284        &mut self,
1285        active_pane_item: Option<&dyn ItemHandle>,
1286        _: &mut Window,
1287        cx: &mut Context<Self>,
1288    ) -> ToolbarItemLocation {
1289        self.project_diff = active_pane_item
1290            .and_then(|item| item.act_as::<ProjectDiff>(cx))
1291            .filter(|item| item.read(cx).diff_base(cx) == &DiffBase::Head)
1292            .map(|entity| entity.downgrade());
1293        if self.project_diff.is_some() {
1294            ToolbarItemLocation::PrimaryRight
1295        } else {
1296            ToolbarItemLocation::Hidden
1297        }
1298    }
1299
1300    fn pane_focus_update(
1301        &mut self,
1302        _pane_focused: bool,
1303        _window: &mut Window,
1304        _cx: &mut Context<Self>,
1305    ) {
1306    }
1307}
1308
1309struct ButtonStates {
1310    stage: bool,
1311    unstage: bool,
1312    prev_next: bool,
1313    selection: bool,
1314    stage_all: bool,
1315    unstage_all: bool,
1316}
1317
1318impl Render for ProjectDiffToolbar {
1319    fn render(&mut self, _: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
1320        let Some(project_diff) = self.project_diff(cx) else {
1321            return div();
1322        };
1323        let focus_handle = project_diff.focus_handle(cx);
1324        let button_states = project_diff.read(cx).button_states(cx);
1325        let review_count = project_diff.read(cx).total_review_comment_count();
1326
1327        h_group_xl()
1328            .my_neg_1()
1329            .py_1()
1330            .items_center()
1331            .flex_wrap()
1332            .justify_between()
1333            .child(
1334                h_group_sm()
1335                    .when(button_states.selection, |el| {
1336                        el.child(
1337                            Button::new("stage", "Toggle Staged")
1338                                .tooltip(Tooltip::for_action_title_in(
1339                                    "Toggle Staged",
1340                                    &ToggleStaged,
1341                                    &focus_handle,
1342                                ))
1343                                .disabled(!button_states.stage && !button_states.unstage)
1344                                .on_click(cx.listener(|this, _, window, cx| {
1345                                    this.dispatch_action(&ToggleStaged, window, cx)
1346                                })),
1347                        )
1348                    })
1349                    .when(!button_states.selection, |el| {
1350                        el.child(
1351                            Button::new("stage", "Stage")
1352                                .tooltip(Tooltip::for_action_title_in(
1353                                    "Stage and go to next hunk",
1354                                    &StageAndNext,
1355                                    &focus_handle,
1356                                ))
1357                                .disabled(
1358                                    !button_states.prev_next
1359                                        && !button_states.stage_all
1360                                        && !button_states.unstage_all,
1361                                )
1362                                .on_click(cx.listener(|this, _, window, cx| {
1363                                    this.dispatch_action(&StageAndNext, window, cx)
1364                                })),
1365                        )
1366                        .child(
1367                            Button::new("unstage", "Unstage")
1368                                .tooltip(Tooltip::for_action_title_in(
1369                                    "Unstage and go to next hunk",
1370                                    &UnstageAndNext,
1371                                    &focus_handle,
1372                                ))
1373                                .disabled(
1374                                    !button_states.prev_next
1375                                        && !button_states.stage_all
1376                                        && !button_states.unstage_all,
1377                                )
1378                                .on_click(cx.listener(|this, _, window, cx| {
1379                                    this.dispatch_action(&UnstageAndNext, window, cx)
1380                                })),
1381                        )
1382                    }),
1383            )
1384            // n.b. the only reason these arrows are here is because we don't
1385            // support "undo" for staging so we need a way to go back.
1386            .child(
1387                h_group_sm()
1388                    .child(
1389                        IconButton::new("up", IconName::ArrowUp)
1390                            .shape(ui::IconButtonShape::Square)
1391                            .tooltip(Tooltip::for_action_title_in(
1392                                "Go to previous hunk",
1393                                &GoToPreviousHunk,
1394                                &focus_handle,
1395                            ))
1396                            .disabled(!button_states.prev_next)
1397                            .on_click(cx.listener(|this, _, window, cx| {
1398                                this.dispatch_action(&GoToPreviousHunk, window, cx)
1399                            })),
1400                    )
1401                    .child(
1402                        IconButton::new("down", IconName::ArrowDown)
1403                            .shape(ui::IconButtonShape::Square)
1404                            .tooltip(Tooltip::for_action_title_in(
1405                                "Go to next hunk",
1406                                &GoToHunk,
1407                                &focus_handle,
1408                            ))
1409                            .disabled(!button_states.prev_next)
1410                            .on_click(cx.listener(|this, _, window, cx| {
1411                                this.dispatch_action(&GoToHunk, window, cx)
1412                            })),
1413                    ),
1414            )
1415            .child(vertical_divider())
1416            .child(
1417                h_group_sm()
1418                    .when(
1419                        button_states.unstage_all && !button_states.stage_all,
1420                        |el| {
1421                            el.child(
1422                                Button::new("unstage-all", "Unstage All")
1423                                    .tooltip(Tooltip::for_action_title_in(
1424                                        "Unstage all changes",
1425                                        &UnstageAll,
1426                                        &focus_handle,
1427                                    ))
1428                                    .on_click(cx.listener(|this, _, window, cx| {
1429                                        this.unstage_all(window, cx)
1430                                    })),
1431                            )
1432                        },
1433                    )
1434                    .when(
1435                        !button_states.unstage_all || button_states.stage_all,
1436                        |el| {
1437                            el.child(
1438                                // todo make it so that changing to say "Unstaged"
1439                                // doesn't change the position.
1440                                div().child(
1441                                    Button::new("stage-all", "Stage All")
1442                                        .disabled(!button_states.stage_all)
1443                                        .tooltip(Tooltip::for_action_title_in(
1444                                            "Stage all changes",
1445                                            &StageAll,
1446                                            &focus_handle,
1447                                        ))
1448                                        .on_click(cx.listener(|this, _, window, cx| {
1449                                            this.stage_all(window, cx)
1450                                        })),
1451                                ),
1452                            )
1453                        },
1454                    )
1455                    .child(
1456                        Button::new("commit", "Commit")
1457                            .tooltip(Tooltip::for_action_title_in(
1458                                "Commit",
1459                                &Commit,
1460                                &focus_handle,
1461                            ))
1462                            .on_click(cx.listener(|this, _, window, cx| {
1463                                this.dispatch_action(&Commit, window, cx);
1464                            })),
1465                    ),
1466            )
1467            // "Send Review to Agent" button (only shown when there are review comments)
1468            .when(review_count > 0, |el| {
1469                el.child(vertical_divider()).child(
1470                    render_send_review_to_agent_button(review_count, &focus_handle).on_click(
1471                        cx.listener(|this, _, window, cx| {
1472                            this.dispatch_action(&SendReviewToAgent, window, cx)
1473                        }),
1474                    ),
1475                )
1476            })
1477    }
1478}
1479
1480fn render_send_review_to_agent_button(review_count: usize, focus_handle: &FocusHandle) -> Button {
1481    Button::new(
1482        "send-review",
1483        format!("Send Review to Agent ({})", review_count),
1484    )
1485    .icon(IconName::ZedAssistant)
1486    .icon_position(IconPosition::Start)
1487    .tooltip(Tooltip::for_action_title_in(
1488        "Send all review comments to the Agent panel",
1489        &SendReviewToAgent,
1490        focus_handle,
1491    ))
1492}
1493
1494pub struct BranchDiffToolbar {
1495    project_diff: Option<WeakEntity<ProjectDiff>>,
1496}
1497
1498impl BranchDiffToolbar {
1499    pub fn new(_: &mut Context<Self>) -> Self {
1500        Self { project_diff: None }
1501    }
1502
1503    fn project_diff(&self, _: &App) -> Option<Entity<ProjectDiff>> {
1504        self.project_diff.as_ref()?.upgrade()
1505    }
1506
1507    fn dispatch_action(&self, action: &dyn Action, window: &mut Window, cx: &mut Context<Self>) {
1508        if let Some(project_diff) = self.project_diff(cx) {
1509            project_diff.focus_handle(cx).focus(window, cx);
1510        }
1511        let action = action.boxed_clone();
1512        cx.defer(move |cx| {
1513            cx.dispatch_action(action.as_ref());
1514        })
1515    }
1516}
1517
1518impl EventEmitter<ToolbarItemEvent> for BranchDiffToolbar {}
1519
1520impl ToolbarItemView for BranchDiffToolbar {
1521    fn set_active_pane_item(
1522        &mut self,
1523        active_pane_item: Option<&dyn ItemHandle>,
1524        _: &mut Window,
1525        cx: &mut Context<Self>,
1526    ) -> ToolbarItemLocation {
1527        self.project_diff = active_pane_item
1528            .and_then(|item| item.act_as::<ProjectDiff>(cx))
1529            .filter(|item| matches!(item.read(cx).diff_base(cx), DiffBase::Merge { .. }))
1530            .map(|entity| entity.downgrade());
1531        if self.project_diff.is_some() {
1532            ToolbarItemLocation::PrimaryRight
1533        } else {
1534            ToolbarItemLocation::Hidden
1535        }
1536    }
1537
1538    fn pane_focus_update(
1539        &mut self,
1540        _pane_focused: bool,
1541        _window: &mut Window,
1542        _cx: &mut Context<Self>,
1543    ) {
1544    }
1545}
1546
1547impl Render for BranchDiffToolbar {
1548    fn render(&mut self, _: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
1549        let Some(project_diff) = self.project_diff(cx) else {
1550            return div();
1551        };
1552        let focus_handle = project_diff.focus_handle(cx);
1553        let review_count = project_diff.read(cx).total_review_comment_count();
1554
1555        h_group_xl()
1556            .my_neg_1()
1557            .py_1()
1558            .items_center()
1559            .flex_wrap()
1560            .justify_end()
1561            .when(review_count > 0, |el| {
1562                el.child(
1563                    render_send_review_to_agent_button(review_count, &focus_handle).on_click(
1564                        cx.listener(|this, _, window, cx| {
1565                            this.dispatch_action(&SendReviewToAgent, window, cx)
1566                        }),
1567                    ),
1568                )
1569            })
1570    }
1571}
1572
1573#[derive(IntoElement, RegisterComponent)]
1574pub struct ProjectDiffEmptyState {
1575    pub no_repo: bool,
1576    pub can_push_and_pull: bool,
1577    pub focus_handle: Option<FocusHandle>,
1578    pub current_branch: Option<Branch>,
1579    // has_pending_commits: bool,
1580    // ahead_of_remote: bool,
1581    // no_git_repository: bool,
1582}
1583
1584impl RenderOnce for ProjectDiffEmptyState {
1585    fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
1586        let status_against_remote = |ahead_by: usize, behind_by: usize| -> bool {
1587            matches!(self.current_branch, Some(Branch {
1588                    upstream:
1589                        Some(Upstream {
1590                            tracking:
1591                                UpstreamTracking::Tracked(UpstreamTrackingStatus {
1592                                    ahead, behind, ..
1593                                }),
1594                            ..
1595                        }),
1596                    ..
1597                }) if (ahead > 0) == (ahead_by > 0) && (behind > 0) == (behind_by > 0))
1598        };
1599
1600        let change_count = |current_branch: &Branch| -> (usize, usize) {
1601            match current_branch {
1602                Branch {
1603                    upstream:
1604                        Some(Upstream {
1605                            tracking:
1606                                UpstreamTracking::Tracked(UpstreamTrackingStatus {
1607                                    ahead, behind, ..
1608                                }),
1609                            ..
1610                        }),
1611                    ..
1612                } => (*ahead as usize, *behind as usize),
1613                _ => (0, 0),
1614            }
1615        };
1616
1617        let not_ahead_or_behind = status_against_remote(0, 0);
1618        let ahead_of_remote = status_against_remote(1, 0);
1619        let branch_not_on_remote = if let Some(branch) = self.current_branch.as_ref() {
1620            branch.upstream.is_none()
1621        } else {
1622            false
1623        };
1624
1625        let has_branch_container = |branch: &Branch| {
1626            h_flex()
1627                .max_w(px(420.))
1628                .bg(cx.theme().colors().text.opacity(0.05))
1629                .border_1()
1630                .border_color(cx.theme().colors().border)
1631                .rounded_sm()
1632                .gap_8()
1633                .px_6()
1634                .py_4()
1635                .map(|this| {
1636                    if ahead_of_remote {
1637                        let ahead_count = change_count(branch).0;
1638                        let ahead_string = format!("{} Commits Ahead", ahead_count);
1639                        this.child(
1640                            v_flex()
1641                                .child(Headline::new(ahead_string).size(HeadlineSize::Small))
1642                                .child(
1643                                    Label::new(format!("Push your changes to {}", branch.name()))
1644                                        .color(Color::Muted),
1645                                ),
1646                        )
1647                        .child(div().child(render_push_button(
1648                            self.focus_handle,
1649                            "push".into(),
1650                            ahead_count as u32,
1651                        )))
1652                    } else if branch_not_on_remote {
1653                        this.child(
1654                            v_flex()
1655                                .child(Headline::new("Publish Branch").size(HeadlineSize::Small))
1656                                .child(
1657                                    Label::new(format!("Create {} on remote", branch.name()))
1658                                        .color(Color::Muted),
1659                                ),
1660                        )
1661                        .child(
1662                            div().child(render_publish_button(self.focus_handle, "publish".into())),
1663                        )
1664                    } else {
1665                        this.child(Label::new("Remote status unknown").color(Color::Muted))
1666                    }
1667                })
1668        };
1669
1670        v_flex().size_full().items_center().justify_center().child(
1671            v_flex()
1672                .gap_1()
1673                .when(self.no_repo, |this| {
1674                    // TODO: add git init
1675                    this.text_center()
1676                        .child(Label::new("No Repository").color(Color::Muted))
1677                })
1678                .map(|this| {
1679                    if not_ahead_or_behind && self.current_branch.is_some() {
1680                        this.text_center()
1681                            .child(Label::new("No Changes").color(Color::Muted))
1682                    } else {
1683                        this.when_some(self.current_branch.as_ref(), |this, branch| {
1684                            this.child(has_branch_container(branch))
1685                        })
1686                    }
1687                }),
1688        )
1689    }
1690}
1691
1692mod preview {
1693    use git::repository::{
1694        Branch, CommitSummary, Upstream, UpstreamTracking, UpstreamTrackingStatus,
1695    };
1696    use ui::prelude::*;
1697
1698    use super::ProjectDiffEmptyState;
1699
1700    // View this component preview using `workspace: open component-preview`
1701    impl Component for ProjectDiffEmptyState {
1702        fn scope() -> ComponentScope {
1703            ComponentScope::VersionControl
1704        }
1705
1706        fn preview(_window: &mut Window, _cx: &mut App) -> Option<AnyElement> {
1707            let unknown_upstream: Option<UpstreamTracking> = None;
1708            let ahead_of_upstream: Option<UpstreamTracking> = Some(
1709                UpstreamTrackingStatus {
1710                    ahead: 2,
1711                    behind: 0,
1712                }
1713                .into(),
1714            );
1715
1716            let not_ahead_or_behind_upstream: Option<UpstreamTracking> = Some(
1717                UpstreamTrackingStatus {
1718                    ahead: 0,
1719                    behind: 0,
1720                }
1721                .into(),
1722            );
1723
1724            fn branch(upstream: Option<UpstreamTracking>) -> Branch {
1725                Branch {
1726                    is_head: true,
1727                    ref_name: "some-branch".into(),
1728                    upstream: upstream.map(|tracking| Upstream {
1729                        ref_name: "origin/some-branch".into(),
1730                        tracking,
1731                    }),
1732                    most_recent_commit: Some(CommitSummary {
1733                        sha: "abc123".into(),
1734                        subject: "Modify stuff".into(),
1735                        commit_timestamp: 1710932954,
1736                        author_name: "John Doe".into(),
1737                        has_parent: true,
1738                    }),
1739                }
1740            }
1741
1742            let no_repo_state = ProjectDiffEmptyState {
1743                no_repo: true,
1744                can_push_and_pull: false,
1745                focus_handle: None,
1746                current_branch: None,
1747            };
1748
1749            let no_changes_state = ProjectDiffEmptyState {
1750                no_repo: false,
1751                can_push_and_pull: true,
1752                focus_handle: None,
1753                current_branch: Some(branch(not_ahead_or_behind_upstream)),
1754            };
1755
1756            let ahead_of_upstream_state = ProjectDiffEmptyState {
1757                no_repo: false,
1758                can_push_and_pull: true,
1759                focus_handle: None,
1760                current_branch: Some(branch(ahead_of_upstream)),
1761            };
1762
1763            let unknown_upstream_state = ProjectDiffEmptyState {
1764                no_repo: false,
1765                can_push_and_pull: true,
1766                focus_handle: None,
1767                current_branch: Some(branch(unknown_upstream)),
1768            };
1769
1770            let (width, height) = (px(480.), px(320.));
1771
1772            Some(
1773                v_flex()
1774                    .gap_6()
1775                    .children(vec![
1776                        example_group(vec![
1777                            single_example(
1778                                "No Repo",
1779                                div()
1780                                    .w(width)
1781                                    .h(height)
1782                                    .child(no_repo_state)
1783                                    .into_any_element(),
1784                            ),
1785                            single_example(
1786                                "No Changes",
1787                                div()
1788                                    .w(width)
1789                                    .h(height)
1790                                    .child(no_changes_state)
1791                                    .into_any_element(),
1792                            ),
1793                            single_example(
1794                                "Unknown Upstream",
1795                                div()
1796                                    .w(width)
1797                                    .h(height)
1798                                    .child(unknown_upstream_state)
1799                                    .into_any_element(),
1800                            ),
1801                            single_example(
1802                                "Ahead of Remote",
1803                                div()
1804                                    .w(width)
1805                                    .h(height)
1806                                    .child(ahead_of_upstream_state)
1807                                    .into_any_element(),
1808                            ),
1809                        ])
1810                        .vertical(),
1811                    ])
1812                    .into_any_element(),
1813            )
1814        }
1815    }
1816}
1817
1818struct BranchDiffAddon {
1819    branch_diff: Entity<branch_diff::BranchDiff>,
1820}
1821
1822impl Addon for BranchDiffAddon {
1823    fn to_any(&self) -> &dyn std::any::Any {
1824        self
1825    }
1826
1827    fn override_status_for_buffer_id(
1828        &self,
1829        buffer_id: language::BufferId,
1830        cx: &App,
1831    ) -> Option<FileStatus> {
1832        self.branch_diff
1833            .read(cx)
1834            .status_for_buffer_id(buffer_id, cx)
1835    }
1836}
1837
1838#[cfg(test)]
1839mod tests {
1840    use collections::HashMap;
1841    use db::indoc;
1842    use editor::test::editor_test_context::{EditorTestContext, assert_state_with_diff};
1843    use git::status::{TrackedStatus, UnmergedStatus, UnmergedStatusCode};
1844    use gpui::TestAppContext;
1845    use project::FakeFs;
1846    use serde_json::json;
1847    use settings::SettingsStore;
1848    use std::path::Path;
1849    use unindent::Unindent as _;
1850    use util::{
1851        path,
1852        rel_path::{RelPath, rel_path},
1853    };
1854
1855    use super::*;
1856
1857    #[ctor::ctor]
1858    fn init_logger() {
1859        zlog::init_test();
1860    }
1861
1862    fn init_test(cx: &mut TestAppContext) {
1863        cx.update(|cx| {
1864            let store = SettingsStore::test(cx);
1865            cx.set_global(store);
1866            theme::init(theme::LoadThemes::JustBase, cx);
1867            editor::init(cx);
1868            crate::init(cx);
1869        });
1870    }
1871
1872    #[gpui::test]
1873    async fn test_save_after_restore(cx: &mut TestAppContext) {
1874        init_test(cx);
1875
1876        let fs = FakeFs::new(cx.executor());
1877        fs.insert_tree(
1878            path!("/project"),
1879            json!({
1880                ".git": {},
1881                "foo.txt": "FOO\n",
1882            }),
1883        )
1884        .await;
1885        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
1886
1887        fs.set_head_for_repo(
1888            path!("/project/.git").as_ref(),
1889            &[("foo.txt", "foo\n".into())],
1890            "deadbeef",
1891        );
1892        fs.set_index_for_repo(
1893            path!("/project/.git").as_ref(),
1894            &[("foo.txt", "foo\n".into())],
1895        );
1896
1897        let (workspace, cx) =
1898            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1899        let diff = cx.new_window_entity(|window, cx| {
1900            ProjectDiff::new(project.clone(), workspace, window, cx)
1901        });
1902        cx.run_until_parked();
1903
1904        let editor = diff.read_with(cx, |diff, cx| diff.editor.read(cx).rhs_editor().clone());
1905        assert_state_with_diff(
1906            &editor,
1907            cx,
1908            &"
1909                - ˇfoo
1910                + FOO
1911            "
1912            .unindent(),
1913        );
1914
1915        editor
1916            .update_in(cx, |editor, window, cx| {
1917                editor.git_restore(&Default::default(), window, cx);
1918                editor.save(SaveOptions::default(), project.clone(), window, cx)
1919            })
1920            .await
1921            .unwrap();
1922        cx.run_until_parked();
1923
1924        assert_state_with_diff(&editor, cx, &"ˇ".unindent());
1925
1926        let text = String::from_utf8(fs.read_file_sync("/project/foo.txt").unwrap()).unwrap();
1927        assert_eq!(text, "foo\n");
1928    }
1929
1930    #[gpui::test]
1931    async fn test_scroll_to_beginning_with_deletion(cx: &mut TestAppContext) {
1932        init_test(cx);
1933
1934        let fs = FakeFs::new(cx.executor());
1935        fs.insert_tree(
1936            path!("/project"),
1937            json!({
1938                ".git": {},
1939                "bar": "BAR\n",
1940                "foo": "FOO\n",
1941            }),
1942        )
1943        .await;
1944        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
1945        let (workspace, cx) =
1946            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1947        let diff = cx.new_window_entity(|window, cx| {
1948            ProjectDiff::new(project.clone(), workspace, window, cx)
1949        });
1950        cx.run_until_parked();
1951
1952        fs.set_head_and_index_for_repo(
1953            path!("/project/.git").as_ref(),
1954            &[("bar", "bar\n".into()), ("foo", "foo\n".into())],
1955        );
1956        cx.run_until_parked();
1957
1958        let editor = cx.update_window_entity(&diff, |diff, window, cx| {
1959            diff.move_to_path(
1960                PathKey::with_sort_prefix(TRACKED_SORT_PREFIX, rel_path("foo").into_arc()),
1961                window,
1962                cx,
1963            );
1964            diff.editor.read(cx).rhs_editor().clone()
1965        });
1966        assert_state_with_diff(
1967            &editor,
1968            cx,
1969            &"
1970                - bar
1971                + BAR
1972
1973                - ˇfoo
1974                + FOO
1975            "
1976            .unindent(),
1977        );
1978
1979        let editor = cx.update_window_entity(&diff, |diff, window, cx| {
1980            diff.move_to_path(
1981                PathKey::with_sort_prefix(TRACKED_SORT_PREFIX, rel_path("bar").into_arc()),
1982                window,
1983                cx,
1984            );
1985            diff.editor.read(cx).rhs_editor().clone()
1986        });
1987        assert_state_with_diff(
1988            &editor,
1989            cx,
1990            &"
1991                - ˇbar
1992                + BAR
1993
1994                - foo
1995                + FOO
1996            "
1997            .unindent(),
1998        );
1999    }
2000
2001    #[gpui::test]
2002    async fn test_hunks_after_restore_then_modify(cx: &mut TestAppContext) {
2003        init_test(cx);
2004
2005        let fs = FakeFs::new(cx.executor());
2006        fs.insert_tree(
2007            path!("/project"),
2008            json!({
2009                ".git": {},
2010                "foo": "modified\n",
2011            }),
2012        )
2013        .await;
2014        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
2015        let (workspace, cx) =
2016            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2017        fs.set_head_for_repo(
2018            path!("/project/.git").as_ref(),
2019            &[("foo", "original\n".into())],
2020            "deadbeef",
2021        );
2022
2023        let buffer = project
2024            .update(cx, |project, cx| {
2025                project.open_local_buffer(path!("/project/foo"), cx)
2026            })
2027            .await
2028            .unwrap();
2029        let buffer_editor = cx.new_window_entity(|window, cx| {
2030            Editor::for_buffer(buffer, Some(project.clone()), window, cx)
2031        });
2032        let diff = cx.new_window_entity(|window, cx| {
2033            ProjectDiff::new(project.clone(), workspace, window, cx)
2034        });
2035        cx.run_until_parked();
2036
2037        let diff_editor = diff.read_with(cx, |diff, cx| diff.editor.read(cx).rhs_editor().clone());
2038
2039        assert_state_with_diff(
2040            &diff_editor,
2041            cx,
2042            &"
2043                - ˇoriginal
2044                + modified
2045            "
2046            .unindent(),
2047        );
2048
2049        let prev_buffer_hunks =
2050            cx.update_window_entity(&buffer_editor, |buffer_editor, window, cx| {
2051                let snapshot = buffer_editor.snapshot(window, cx);
2052                let snapshot = &snapshot.buffer_snapshot();
2053                let prev_buffer_hunks = buffer_editor
2054                    .diff_hunks_in_ranges(&[editor::Anchor::min()..editor::Anchor::max()], snapshot)
2055                    .collect::<Vec<_>>();
2056                buffer_editor.git_restore(&Default::default(), window, cx);
2057                prev_buffer_hunks
2058            });
2059        assert_eq!(prev_buffer_hunks.len(), 1);
2060        cx.run_until_parked();
2061
2062        let new_buffer_hunks =
2063            cx.update_window_entity(&buffer_editor, |buffer_editor, window, cx| {
2064                let snapshot = buffer_editor.snapshot(window, cx);
2065                let snapshot = &snapshot.buffer_snapshot();
2066                buffer_editor
2067                    .diff_hunks_in_ranges(&[editor::Anchor::min()..editor::Anchor::max()], snapshot)
2068                    .collect::<Vec<_>>()
2069            });
2070        assert_eq!(new_buffer_hunks.as_slice(), &[]);
2071
2072        cx.update_window_entity(&buffer_editor, |buffer_editor, window, cx| {
2073            buffer_editor.set_text("different\n", window, cx);
2074            buffer_editor.save(
2075                SaveOptions {
2076                    format: false,
2077                    autosave: false,
2078                },
2079                project.clone(),
2080                window,
2081                cx,
2082            )
2083        })
2084        .await
2085        .unwrap();
2086
2087        cx.run_until_parked();
2088
2089        cx.update_window_entity(&buffer_editor, |buffer_editor, window, cx| {
2090            buffer_editor.expand_all_diff_hunks(&Default::default(), window, cx);
2091        });
2092
2093        assert_state_with_diff(
2094            &buffer_editor,
2095            cx,
2096            &"
2097                - original
2098                + different
2099                  ˇ"
2100            .unindent(),
2101        );
2102
2103        assert_state_with_diff(
2104            &diff_editor,
2105            cx,
2106            &"
2107                - ˇoriginal
2108                + different
2109            "
2110            .unindent(),
2111        );
2112    }
2113
2114    use crate::{
2115        conflict_view::resolve_conflict,
2116        project_diff::{self, ProjectDiff},
2117    };
2118
2119    #[gpui::test]
2120    async fn test_go_to_prev_hunk_multibuffer(cx: &mut TestAppContext) {
2121        init_test(cx);
2122
2123        let fs = FakeFs::new(cx.executor());
2124        fs.insert_tree(
2125            path!("/a"),
2126            json!({
2127                ".git": {},
2128                "a.txt": "created\n",
2129                "b.txt": "really changed\n",
2130                "c.txt": "unchanged\n"
2131            }),
2132        )
2133        .await;
2134
2135        fs.set_head_and_index_for_repo(
2136            Path::new(path!("/a/.git")),
2137            &[
2138                ("b.txt", "before\n".to_string()),
2139                ("c.txt", "unchanged\n".to_string()),
2140                ("d.txt", "deleted\n".to_string()),
2141            ],
2142        );
2143
2144        let project = Project::test(fs, [Path::new(path!("/a"))], cx).await;
2145        let (workspace, cx) =
2146            cx.add_window_view(|window, cx| Workspace::test_new(project, window, cx));
2147
2148        cx.run_until_parked();
2149
2150        cx.focus(&workspace);
2151        cx.update(|window, cx| {
2152            window.dispatch_action(project_diff::Diff.boxed_clone(), cx);
2153        });
2154
2155        cx.run_until_parked();
2156
2157        let item = workspace.update(cx, |workspace, cx| {
2158            workspace.active_item_as::<ProjectDiff>(cx).unwrap()
2159        });
2160        cx.focus(&item);
2161        let editor = item.read_with(cx, |item, cx| item.editor.read(cx).rhs_editor().clone());
2162
2163        let mut cx = EditorTestContext::for_editor_in(editor, cx).await;
2164
2165        cx.assert_excerpts_with_selections(indoc!(
2166            "
2167            [EXCERPT]
2168            before
2169            really changed
2170            [EXCERPT]
2171            [FOLDED]
2172            [EXCERPT]
2173            ˇcreated
2174        "
2175        ));
2176
2177        cx.dispatch_action(editor::actions::GoToPreviousHunk);
2178
2179        cx.assert_excerpts_with_selections(indoc!(
2180            "
2181            [EXCERPT]
2182            before
2183            really changed
2184            [EXCERPT]
2185            ˇ[FOLDED]
2186            [EXCERPT]
2187            created
2188        "
2189        ));
2190
2191        cx.dispatch_action(editor::actions::GoToPreviousHunk);
2192
2193        cx.assert_excerpts_with_selections(indoc!(
2194            "
2195            [EXCERPT]
2196            ˇbefore
2197            really changed
2198            [EXCERPT]
2199            [FOLDED]
2200            [EXCERPT]
2201            created
2202        "
2203        ));
2204    }
2205
2206    #[gpui::test]
2207    async fn test_excerpts_splitting_after_restoring_the_middle_excerpt(cx: &mut TestAppContext) {
2208        init_test(cx);
2209
2210        let git_contents = indoc! {r#"
2211            #[rustfmt::skip]
2212            fn main() {
2213                let x = 0.0; // this line will be removed
2214                // 1
2215                // 2
2216                // 3
2217                let y = 0.0; // this line will be removed
2218                // 1
2219                // 2
2220                // 3
2221                let arr = [
2222                    0.0, // this line will be removed
2223                    0.0, // this line will be removed
2224                    0.0, // this line will be removed
2225                    0.0, // this line will be removed
2226                ];
2227            }
2228        "#};
2229        let buffer_contents = indoc! {"
2230            #[rustfmt::skip]
2231            fn main() {
2232                // 1
2233                // 2
2234                // 3
2235                // 1
2236                // 2
2237                // 3
2238                let arr = [
2239                ];
2240            }
2241        "};
2242
2243        let fs = FakeFs::new(cx.executor());
2244        fs.insert_tree(
2245            path!("/a"),
2246            json!({
2247                ".git": {},
2248                "main.rs": buffer_contents,
2249            }),
2250        )
2251        .await;
2252
2253        fs.set_head_and_index_for_repo(
2254            Path::new(path!("/a/.git")),
2255            &[("main.rs", git_contents.to_owned())],
2256        );
2257
2258        let project = Project::test(fs, [Path::new(path!("/a"))], cx).await;
2259        let (workspace, cx) =
2260            cx.add_window_view(|window, cx| Workspace::test_new(project, window, cx));
2261
2262        cx.run_until_parked();
2263
2264        cx.focus(&workspace);
2265        cx.update(|window, cx| {
2266            window.dispatch_action(project_diff::Diff.boxed_clone(), cx);
2267        });
2268
2269        cx.run_until_parked();
2270
2271        let item = workspace.update(cx, |workspace, cx| {
2272            workspace.active_item_as::<ProjectDiff>(cx).unwrap()
2273        });
2274        cx.focus(&item);
2275        let editor = item.read_with(cx, |item, cx| item.editor.read(cx).rhs_editor().clone());
2276
2277        let mut cx = EditorTestContext::for_editor_in(editor, cx).await;
2278
2279        cx.assert_excerpts_with_selections(&format!("[EXCERPT]\nˇ{git_contents}"));
2280
2281        cx.dispatch_action(editor::actions::GoToHunk);
2282        cx.dispatch_action(editor::actions::GoToHunk);
2283        cx.dispatch_action(git::Restore);
2284        cx.dispatch_action(editor::actions::MoveToBeginning);
2285
2286        cx.assert_excerpts_with_selections(&format!("[EXCERPT]\nˇ{git_contents}"));
2287    }
2288
2289    #[gpui::test]
2290    async fn test_saving_resolved_conflicts(cx: &mut TestAppContext) {
2291        init_test(cx);
2292
2293        let fs = FakeFs::new(cx.executor());
2294        fs.insert_tree(
2295            path!("/project"),
2296            json!({
2297                ".git": {},
2298                "foo": "<<<<<<< x\nours\n=======\ntheirs\n>>>>>>> y\n",
2299            }),
2300        )
2301        .await;
2302        fs.set_status_for_repo(
2303            Path::new(path!("/project/.git")),
2304            &[(
2305                "foo",
2306                UnmergedStatus {
2307                    first_head: UnmergedStatusCode::Updated,
2308                    second_head: UnmergedStatusCode::Updated,
2309                }
2310                .into(),
2311            )],
2312        );
2313        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
2314        let (workspace, cx) =
2315            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2316        let diff = cx.new_window_entity(|window, cx| {
2317            ProjectDiff::new(project.clone(), workspace, window, cx)
2318        });
2319        cx.run_until_parked();
2320
2321        cx.update(|window, cx| {
2322            let editor = diff.read(cx).editor.read(cx).rhs_editor().clone();
2323            let excerpt_ids = editor.read(cx).buffer().read(cx).excerpt_ids();
2324            assert_eq!(excerpt_ids.len(), 1);
2325            let excerpt_id = excerpt_ids[0];
2326            let buffer = editor
2327                .read(cx)
2328                .buffer()
2329                .read(cx)
2330                .all_buffers()
2331                .into_iter()
2332                .next()
2333                .unwrap();
2334            let buffer_id = buffer.read(cx).remote_id();
2335            let conflict_set = diff
2336                .read(cx)
2337                .editor
2338                .read(cx)
2339                .rhs_editor()
2340                .read(cx)
2341                .addon::<ConflictAddon>()
2342                .unwrap()
2343                .conflict_set(buffer_id)
2344                .unwrap();
2345            assert!(conflict_set.read(cx).has_conflict);
2346            let snapshot = conflict_set.read(cx).snapshot();
2347            assert_eq!(snapshot.conflicts.len(), 1);
2348
2349            let ours_range = snapshot.conflicts[0].ours.clone();
2350
2351            resolve_conflict(
2352                editor.downgrade(),
2353                excerpt_id,
2354                snapshot.conflicts[0].clone(),
2355                vec![ours_range],
2356                window,
2357                cx,
2358            )
2359        })
2360        .await;
2361
2362        let contents = fs.read_file_sync(path!("/project/foo")).unwrap();
2363        let contents = String::from_utf8(contents).unwrap();
2364        assert_eq!(contents, "ours\n");
2365    }
2366
2367    #[gpui::test]
2368    async fn test_new_hunk_in_modified_file(cx: &mut TestAppContext) {
2369        init_test(cx);
2370
2371        let fs = FakeFs::new(cx.executor());
2372        fs.insert_tree(
2373            path!("/project"),
2374            json!({
2375                ".git": {},
2376                "foo.txt": "
2377                    one
2378                    two
2379                    three
2380                    four
2381                    five
2382                    six
2383                    seven
2384                    eight
2385                    nine
2386                    ten
2387                    ELEVEN
2388                    twelve
2389                ".unindent()
2390            }),
2391        )
2392        .await;
2393        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
2394        let (workspace, cx) =
2395            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2396        let diff = cx.new_window_entity(|window, cx| {
2397            ProjectDiff::new(project.clone(), workspace, window, cx)
2398        });
2399        cx.run_until_parked();
2400
2401        fs.set_head_and_index_for_repo(
2402            Path::new(path!("/project/.git")),
2403            &[(
2404                "foo.txt",
2405                "
2406                    one
2407                    two
2408                    three
2409                    four
2410                    five
2411                    six
2412                    seven
2413                    eight
2414                    nine
2415                    ten
2416                    eleven
2417                    twelve
2418                "
2419                .unindent(),
2420            )],
2421        );
2422        cx.run_until_parked();
2423
2424        let editor = diff.read_with(cx, |diff, cx| diff.editor.read(cx).rhs_editor().clone());
2425
2426        assert_state_with_diff(
2427            &editor,
2428            cx,
2429            &"
2430                  ˇnine
2431                  ten
2432                - eleven
2433                + ELEVEN
2434                  twelve
2435            "
2436            .unindent(),
2437        );
2438
2439        // The project diff updates its excerpts when a new hunk appears in a buffer that already has a diff.
2440        let buffer = project
2441            .update(cx, |project, cx| {
2442                project.open_local_buffer(path!("/project/foo.txt"), cx)
2443            })
2444            .await
2445            .unwrap();
2446        buffer.update(cx, |buffer, cx| {
2447            buffer.edit_via_marked_text(
2448                &"
2449                    one
2450                    «TWO»
2451                    three
2452                    four
2453                    five
2454                    six
2455                    seven
2456                    eight
2457                    nine
2458                    ten
2459                    ELEVEN
2460                    twelve
2461                "
2462                .unindent(),
2463                None,
2464                cx,
2465            );
2466        });
2467        project
2468            .update(cx, |project, cx| project.save_buffer(buffer.clone(), cx))
2469            .await
2470            .unwrap();
2471        cx.run_until_parked();
2472
2473        assert_state_with_diff(
2474            &editor,
2475            cx,
2476            &"
2477                  one
2478                - two
2479                + TWO
2480                  three
2481                  four
2482                  five
2483                  ˇnine
2484                  ten
2485                - eleven
2486                + ELEVEN
2487                  twelve
2488            "
2489            .unindent(),
2490        );
2491    }
2492
2493    #[gpui::test]
2494    async fn test_branch_diff(cx: &mut TestAppContext) {
2495        init_test(cx);
2496
2497        let fs = FakeFs::new(cx.executor());
2498        fs.insert_tree(
2499            path!("/project"),
2500            json!({
2501                ".git": {},
2502                "a.txt": "C",
2503                "b.txt": "new",
2504                "c.txt": "in-merge-base-and-work-tree",
2505                "d.txt": "created-in-head",
2506            }),
2507        )
2508        .await;
2509        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
2510        let (workspace, cx) =
2511            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2512        let diff = cx
2513            .update(|window, cx| {
2514                ProjectDiff::new_with_default_branch(project.clone(), workspace, window, cx)
2515            })
2516            .await
2517            .unwrap();
2518        cx.run_until_parked();
2519
2520        fs.set_head_for_repo(
2521            Path::new(path!("/project/.git")),
2522            &[("a.txt", "B".into()), ("d.txt", "created-in-head".into())],
2523            "sha",
2524        );
2525        // fs.set_index_for_repo(dot_git, index_state);
2526        fs.set_merge_base_content_for_repo(
2527            Path::new(path!("/project/.git")),
2528            &[
2529                ("a.txt", "A".into()),
2530                ("c.txt", "in-merge-base-and-work-tree".into()),
2531            ],
2532        );
2533        cx.run_until_parked();
2534
2535        let editor = diff.read_with(cx, |diff, cx| diff.editor.read(cx).rhs_editor().clone());
2536
2537        assert_state_with_diff(
2538            &editor,
2539            cx,
2540            &"
2541                - A
2542                + ˇC
2543                + new
2544                + created-in-head"
2545                .unindent(),
2546        );
2547
2548        let statuses: HashMap<Arc<RelPath>, Option<FileStatus>> =
2549            editor.update(cx, |editor, cx| {
2550                editor
2551                    .buffer()
2552                    .read(cx)
2553                    .all_buffers()
2554                    .iter()
2555                    .map(|buffer| {
2556                        (
2557                            buffer.read(cx).file().unwrap().path().clone(),
2558                            editor.status_for_buffer_id(buffer.read(cx).remote_id(), cx),
2559                        )
2560                    })
2561                    .collect()
2562            });
2563
2564        assert_eq!(
2565            statuses,
2566            HashMap::from_iter([
2567                (
2568                    rel_path("a.txt").into_arc(),
2569                    Some(FileStatus::Tracked(TrackedStatus {
2570                        index_status: git::status::StatusCode::Modified,
2571                        worktree_status: git::status::StatusCode::Modified
2572                    }))
2573                ),
2574                (rel_path("b.txt").into_arc(), Some(FileStatus::Untracked)),
2575                (
2576                    rel_path("d.txt").into_arc(),
2577                    Some(FileStatus::Tracked(TrackedStatus {
2578                        index_status: git::status::StatusCode::Added,
2579                        worktree_status: git::status::StatusCode::Added
2580                    }))
2581                )
2582            ])
2583        );
2584    }
2585
2586    #[gpui::test]
2587    async fn test_update_on_uncommit(cx: &mut TestAppContext) {
2588        init_test(cx);
2589
2590        let fs = FakeFs::new(cx.executor());
2591        fs.insert_tree(
2592            path!("/project"),
2593            json!({
2594                ".git": {},
2595                "README.md": "# My cool project\n".to_owned()
2596            }),
2597        )
2598        .await;
2599        fs.set_head_and_index_for_repo(
2600            Path::new(path!("/project/.git")),
2601            &[("README.md", "# My cool project\n".to_owned())],
2602        );
2603        let project = Project::test(fs.clone(), [Path::new(path!("/project"))], cx).await;
2604        let worktree_id = project.read_with(cx, |project, cx| {
2605            project.worktrees(cx).next().unwrap().read(cx).id()
2606        });
2607        let (workspace, cx) =
2608            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2609        cx.run_until_parked();
2610
2611        let _editor = workspace
2612            .update_in(cx, |workspace, window, cx| {
2613                workspace.open_path((worktree_id, rel_path("README.md")), None, true, window, cx)
2614            })
2615            .await
2616            .unwrap()
2617            .downcast::<Editor>()
2618            .unwrap();
2619
2620        cx.focus(&workspace);
2621        cx.update(|window, cx| {
2622            window.dispatch_action(project_diff::Diff.boxed_clone(), cx);
2623        });
2624        cx.run_until_parked();
2625        let item = workspace.update(cx, |workspace, cx| {
2626            workspace.active_item_as::<ProjectDiff>(cx).unwrap()
2627        });
2628        cx.focus(&item);
2629        let editor = item.read_with(cx, |item, cx| item.editor.read(cx).rhs_editor().clone());
2630
2631        fs.set_head_and_index_for_repo(
2632            Path::new(path!("/project/.git")),
2633            &[(
2634                "README.md",
2635                "# My cool project\nDetails to come.\n".to_owned(),
2636            )],
2637        );
2638        cx.run_until_parked();
2639
2640        let mut cx = EditorTestContext::for_editor_in(editor, cx).await;
2641
2642        cx.assert_excerpts_with_selections("[EXCERPT]\nˇ# My cool project\nDetails to come.\n");
2643    }
2644
2645    #[gpui::test]
2646    async fn test_deploy_at_respects_worktree_override(cx: &mut TestAppContext) {
2647        init_test(cx);
2648
2649        let fs = FakeFs::new(cx.executor());
2650        fs.insert_tree(
2651            path!("/project_a"),
2652            json!({
2653                ".git": {},
2654                "a.txt": "CHANGED_A\n",
2655            }),
2656        )
2657        .await;
2658        fs.insert_tree(
2659            path!("/project_b"),
2660            json!({
2661                ".git": {},
2662                "b.txt": "CHANGED_B\n",
2663            }),
2664        )
2665        .await;
2666
2667        fs.set_head_and_index_for_repo(
2668            Path::new(path!("/project_a/.git")),
2669            &[("a.txt", "original_a\n".to_string())],
2670        );
2671        fs.set_head_and_index_for_repo(
2672            Path::new(path!("/project_b/.git")),
2673            &[("b.txt", "original_b\n".to_string())],
2674        );
2675
2676        let project = Project::test(
2677            fs.clone(),
2678            [
2679                Path::new(path!("/project_a")),
2680                Path::new(path!("/project_b")),
2681            ],
2682            cx,
2683        )
2684        .await;
2685
2686        let (worktree_a_id, worktree_b_id) = project.read_with(cx, |project, cx| {
2687            let mut worktrees: Vec<_> = project.worktrees(cx).collect();
2688            worktrees.sort_by_key(|w| w.read(cx).abs_path());
2689            (worktrees[0].read(cx).id(), worktrees[1].read(cx).id())
2690        });
2691
2692        let (workspace, cx) =
2693            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2694        cx.run_until_parked();
2695
2696        // Select project A via the dropdown override and open the diff.
2697        workspace.update(cx, |workspace, cx| {
2698            workspace.set_active_worktree_override(Some(worktree_a_id), cx);
2699        });
2700        cx.focus(&workspace);
2701        cx.update(|window, cx| {
2702            window.dispatch_action(project_diff::Diff.boxed_clone(), cx);
2703        });
2704        cx.run_until_parked();
2705
2706        let diff_item = workspace.update(cx, |workspace, cx| {
2707            workspace.active_item_as::<ProjectDiff>(cx).unwrap()
2708        });
2709        let paths_a = diff_item.read_with(cx, |diff, cx| diff.excerpt_paths(cx));
2710        assert_eq!(paths_a.len(), 1);
2711        assert_eq!(*paths_a[0], *"a.txt");
2712
2713        // Switch the override to project B and re-run the diff action.
2714        workspace.update(cx, |workspace, cx| {
2715            workspace.set_active_worktree_override(Some(worktree_b_id), cx);
2716        });
2717        cx.focus(&workspace);
2718        cx.update(|window, cx| {
2719            window.dispatch_action(project_diff::Diff.boxed_clone(), cx);
2720        });
2721        cx.run_until_parked();
2722
2723        let same_diff_item = workspace.update(cx, |workspace, cx| {
2724            workspace.active_item_as::<ProjectDiff>(cx).unwrap()
2725        });
2726        assert_eq!(diff_item.entity_id(), same_diff_item.entity_id());
2727
2728        let paths_b = diff_item.read_with(cx, |diff, cx| diff.excerpt_paths(cx));
2729        assert_eq!(paths_b.len(), 1);
2730        assert_eq!(*paths_b[0], *"b.txt");
2731    }
2732}