project_diff.rs

   1use crate::{
   2    conflict_view::ConflictAddon,
   3    git_panel::{GitPanel, GitPanelAddon, GitStatusEntry},
   4    git_panel_settings::GitPanelSettings,
   5    remote_button::{render_publish_button, render_push_button},
   6};
   7use anyhow::{Context as _, Result, anyhow};
   8use buffer_diff::{BufferDiff, DiffHunkSecondaryStatus};
   9use collections::{HashMap, HashSet};
  10use editor::{
  11    Addon, Editor, EditorEvent, SelectionEffects, SplittableEditor,
  12    actions::{GoToHunk, GoToPreviousHunk},
  13    multibuffer_context_lines,
  14    scroll::Autoscroll,
  15};
  16use git::{
  17    Commit, StageAll, StageAndNext, ToggleStaged, UnstageAll, UnstageAndNext,
  18    repository::{Branch, RepoPath, Upstream, UpstreamTracking, UpstreamTrackingStatus},
  19    status::FileStatus,
  20};
  21use gpui::{
  22    Action, AnyElement, App, AppContext as _, AsyncWindowContext, Entity, EventEmitter,
  23    FocusHandle, Focusable, Render, Subscription, Task, WeakEntity, actions,
  24};
  25use language::{Anchor, Buffer, Capability, OffsetRangeExt};
  26use multi_buffer::{MultiBuffer, PathKey};
  27use project::{
  28    Project, ProjectPath,
  29    git_store::{
  30        Repository,
  31        branch_diff::{self, BranchDiffEvent, DiffBase},
  32    },
  33};
  34use settings::{Settings, SettingsStore};
  35use smol::future::yield_now;
  36use std::any::{Any, TypeId};
  37use std::sync::Arc;
  38use theme::ActiveTheme;
  39use ui::{KeyBinding, Tooltip, prelude::*, vertical_divider};
  40use util::{ResultExt as _, rel_path::RelPath};
  41use workspace::{
  42    CloseActiveItem, ItemNavHistory, SerializableItem, ToolbarItemEvent, ToolbarItemLocation,
  43    ToolbarItemView, Workspace,
  44    item::{Item, ItemEvent, ItemHandle, SaveOptions, TabContentParams},
  45    notifications::NotifyTaskExt,
  46    searchable::SearchableItemHandle,
  47};
  48use ztracing::instrument;
  49
  50actions!(
  51    git,
  52    [
  53        /// Shows the diff between the working directory and the index.
  54        Diff,
  55        /// Adds files to the git staging area.
  56        Add,
  57        /// Shows the diff between the working directory and your default
  58        /// branch (typically main or master).
  59        BranchDiff,
  60        LeaderAndFollower,
  61    ]
  62);
  63
  64pub struct ProjectDiff {
  65    project: Entity<Project>,
  66    multibuffer: Entity<MultiBuffer>,
  67    branch_diff: Entity<branch_diff::BranchDiff>,
  68    editor: Entity<SplittableEditor>,
  69    buffer_diff_subscriptions: HashMap<Arc<RelPath>, (Entity<BufferDiff>, Subscription)>,
  70    workspace: WeakEntity<Workspace>,
  71    focus_handle: FocusHandle,
  72    pending_scroll: Option<PathKey>,
  73    _task: Task<Result<()>>,
  74    _subscription: Subscription,
  75}
  76
  77#[derive(Clone, Copy, Debug, PartialEq, Eq)]
  78pub enum RefreshReason {
  79    DiffChanged,
  80    StatusesChanged,
  81    EditorSaved,
  82}
  83
  84const CONFLICT_SORT_PREFIX: u64 = 1;
  85const TRACKED_SORT_PREFIX: u64 = 2;
  86const NEW_SORT_PREFIX: u64 = 3;
  87
  88impl ProjectDiff {
  89    pub(crate) fn register(workspace: &mut Workspace, cx: &mut Context<Workspace>) {
  90        workspace.register_action(Self::deploy);
  91        workspace.register_action(Self::deploy_branch_diff);
  92        workspace.register_action(|workspace, _: &Add, window, cx| {
  93            Self::deploy(workspace, &Diff, window, cx);
  94        });
  95        workspace::register_serializable_item::<ProjectDiff>(cx);
  96    }
  97
  98    fn deploy(
  99        workspace: &mut Workspace,
 100        _: &Diff,
 101        window: &mut Window,
 102        cx: &mut Context<Workspace>,
 103    ) {
 104        Self::deploy_at(workspace, None, window, cx)
 105    }
 106
 107    fn deploy_branch_diff(
 108        workspace: &mut Workspace,
 109        _: &BranchDiff,
 110        window: &mut Window,
 111        cx: &mut Context<Workspace>,
 112    ) {
 113        telemetry::event!("Git Branch Diff Opened");
 114        let project = workspace.project().clone();
 115
 116        let existing = workspace
 117            .items_of_type::<Self>(cx)
 118            .find(|item| matches!(item.read(cx).diff_base(cx), DiffBase::Merge { .. }));
 119        if let Some(existing) = existing {
 120            workspace.activate_item(&existing, true, true, window, cx);
 121            return;
 122        }
 123        let workspace = cx.entity();
 124        window
 125            .spawn(cx, async move |cx| {
 126                let this = cx
 127                    .update(|window, cx| {
 128                        Self::new_with_default_branch(project, workspace.clone(), window, cx)
 129                    })?
 130                    .await?;
 131                workspace
 132                    .update_in(cx, |workspace, window, cx| {
 133                        workspace.add_item_to_active_pane(Box::new(this), None, true, window, cx);
 134                    })
 135                    .ok();
 136                anyhow::Ok(())
 137            })
 138            .detach_and_notify_err(window, cx);
 139    }
 140
 141    pub fn deploy_at(
 142        workspace: &mut Workspace,
 143        entry: Option<GitStatusEntry>,
 144        window: &mut Window,
 145        cx: &mut Context<Workspace>,
 146    ) {
 147        telemetry::event!(
 148            "Git Diff Opened",
 149            source = if entry.is_some() {
 150                "Git Panel"
 151            } else {
 152                "Action"
 153            }
 154        );
 155        let existing = workspace
 156            .items_of_type::<Self>(cx)
 157            .find(|item| matches!(item.read(cx).diff_base(cx), DiffBase::Head));
 158        let project_diff = if let Some(existing) = existing {
 159            existing.update(cx, |project_diff, cx| {
 160                project_diff.move_to_beginning(window, cx);
 161            });
 162
 163            workspace.activate_item(&existing, true, true, window, cx);
 164            existing
 165        } else {
 166            let workspace_handle = cx.entity();
 167            let project_diff =
 168                cx.new(|cx| Self::new(workspace.project().clone(), workspace_handle, window, cx));
 169            workspace.add_item_to_active_pane(
 170                Box::new(project_diff.clone()),
 171                None,
 172                true,
 173                window,
 174                cx,
 175            );
 176            project_diff
 177        };
 178        if let Some(entry) = entry {
 179            project_diff.update(cx, |project_diff, cx| {
 180                project_diff.move_to_entry(entry, window, cx);
 181            })
 182        }
 183    }
 184
 185    pub fn autoscroll(&self, cx: &mut Context<Self>) {
 186        self.editor.update(cx, |editor, cx| {
 187            editor.primary_editor().update(cx, |editor, cx| {
 188                editor.request_autoscroll(Autoscroll::fit(), cx);
 189            })
 190        })
 191    }
 192
 193    fn new_with_default_branch(
 194        project: Entity<Project>,
 195        workspace: Entity<Workspace>,
 196        window: &mut Window,
 197        cx: &mut App,
 198    ) -> Task<Result<Entity<Self>>> {
 199        let Some(repo) = project.read(cx).git_store().read(cx).active_repository() else {
 200            return Task::ready(Err(anyhow!("No active repository")));
 201        };
 202        let main_branch = repo.update(cx, |repo, _| repo.default_branch());
 203        window.spawn(cx, async move |cx| {
 204            let main_branch = main_branch
 205                .await??
 206                .context("Could not determine default branch")?;
 207
 208            let branch_diff = cx.new_window_entity(|window, cx| {
 209                branch_diff::BranchDiff::new(
 210                    DiffBase::Merge {
 211                        base_ref: main_branch,
 212                    },
 213                    project.clone(),
 214                    window,
 215                    cx,
 216                )
 217            })?;
 218            cx.new_window_entity(|window, cx| {
 219                Self::new_impl(branch_diff, project, workspace, window, cx)
 220            })
 221        })
 222    }
 223
 224    fn new(
 225        project: Entity<Project>,
 226        workspace: Entity<Workspace>,
 227        window: &mut Window,
 228        cx: &mut Context<Self>,
 229    ) -> Self {
 230        let branch_diff =
 231            cx.new(|cx| branch_diff::BranchDiff::new(DiffBase::Head, project.clone(), window, cx));
 232        Self::new_impl(branch_diff, project, workspace, window, cx)
 233    }
 234
 235    fn new_impl(
 236        branch_diff: Entity<branch_diff::BranchDiff>,
 237        project: Entity<Project>,
 238        workspace: Entity<Workspace>,
 239        window: &mut Window,
 240        cx: &mut Context<Self>,
 241    ) -> Self {
 242        let focus_handle = cx.focus_handle();
 243        let multibuffer = cx.new(|cx| {
 244            let mut multibuffer = MultiBuffer::new(Capability::ReadWrite);
 245            multibuffer.set_all_diff_hunks_expanded(cx);
 246            multibuffer
 247        });
 248
 249        let editor = cx.new(|cx| {
 250            let diff_display_editor = SplittableEditor::new_unsplit(
 251                multibuffer.clone(),
 252                project.clone(),
 253                workspace.clone(),
 254                window,
 255                cx,
 256            );
 257            diff_display_editor
 258                .primary_editor()
 259                .update(cx, |editor, cx| {
 260                    editor.disable_diagnostics(cx);
 261
 262                    match branch_diff.read(cx).diff_base() {
 263                        DiffBase::Head => {
 264                            editor.register_addon(GitPanelAddon {
 265                                workspace: workspace.downgrade(),
 266                            });
 267                        }
 268                        DiffBase::Merge { .. } => {
 269                            editor.register_addon(BranchDiffAddon {
 270                                branch_diff: branch_diff.clone(),
 271                            });
 272                            editor.start_temporary_diff_override();
 273                            editor.set_render_diff_hunk_controls(
 274                                Arc::new(|_, _, _, _, _, _, _, _| gpui::Empty.into_any_element()),
 275                                cx,
 276                            );
 277                        }
 278                    }
 279                });
 280            diff_display_editor
 281        });
 282        cx.subscribe_in(&editor, window, Self::handle_editor_event)
 283            .detach();
 284
 285        let branch_diff_subscription = cx.subscribe_in(
 286            &branch_diff,
 287            window,
 288            move |this, _git_store, event, window, cx| match event {
 289                BranchDiffEvent::FileListChanged => {
 290                    this._task = window.spawn(cx, {
 291                        let this = cx.weak_entity();
 292                        async |cx| Self::refresh(this, RefreshReason::StatusesChanged, cx).await
 293                    })
 294                }
 295            },
 296        );
 297
 298        let mut was_sort_by_path = GitPanelSettings::get_global(cx).sort_by_path;
 299        let mut was_collapse_untracked_diff =
 300            GitPanelSettings::get_global(cx).collapse_untracked_diff;
 301        cx.observe_global_in::<SettingsStore>(window, move |this, window, cx| {
 302            let is_sort_by_path = GitPanelSettings::get_global(cx).sort_by_path;
 303            let is_collapse_untracked_diff =
 304                GitPanelSettings::get_global(cx).collapse_untracked_diff;
 305            if is_sort_by_path != was_sort_by_path
 306                || is_collapse_untracked_diff != was_collapse_untracked_diff
 307            {
 308                this._task = {
 309                    window.spawn(cx, {
 310                        let this = cx.weak_entity();
 311                        async |cx| Self::refresh(this, RefreshReason::StatusesChanged, cx).await
 312                    })
 313                }
 314            }
 315            was_sort_by_path = is_sort_by_path;
 316            was_collapse_untracked_diff = is_collapse_untracked_diff;
 317        })
 318        .detach();
 319
 320        let task = window.spawn(cx, {
 321            let this = cx.weak_entity();
 322            async |cx| Self::refresh(this, RefreshReason::StatusesChanged, cx).await
 323        });
 324
 325        Self {
 326            project,
 327            workspace: workspace.downgrade(),
 328            branch_diff,
 329            focus_handle,
 330            editor,
 331            multibuffer,
 332            buffer_diff_subscriptions: Default::default(),
 333            pending_scroll: None,
 334            _task: task,
 335            _subscription: branch_diff_subscription,
 336        }
 337    }
 338
 339    pub fn diff_base<'a>(&'a self, cx: &'a App) -> &'a DiffBase {
 340        self.branch_diff.read(cx).diff_base()
 341    }
 342
 343    pub fn move_to_entry(
 344        &mut self,
 345        entry: GitStatusEntry,
 346        window: &mut Window,
 347        cx: &mut Context<Self>,
 348    ) {
 349        let Some(git_repo) = self.branch_diff.read(cx).repo() else {
 350            return;
 351        };
 352        let repo = git_repo.read(cx);
 353        let sort_prefix = sort_prefix(repo, &entry.repo_path, entry.status, cx);
 354        let path_key = PathKey::with_sort_prefix(sort_prefix, entry.repo_path.as_ref().clone());
 355
 356        self.move_to_path(path_key, window, cx)
 357    }
 358
 359    pub fn active_path(&self, cx: &App) -> Option<ProjectPath> {
 360        let editor = self.editor.read(cx).last_selected_editor().read(cx);
 361        let position = editor.selections.newest_anchor().head();
 362        let multi_buffer = editor.buffer().read(cx);
 363        let (_, buffer, _) = multi_buffer.excerpt_containing(position, cx)?;
 364
 365        let file = buffer.read(cx).file()?;
 366        Some(ProjectPath {
 367            worktree_id: file.worktree_id(cx),
 368            path: file.path().clone(),
 369        })
 370    }
 371
 372    fn move_to_beginning(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 373        self.editor.update(cx, |editor, cx| {
 374            editor.primary_editor().update(cx, |editor, cx| {
 375                editor.move_to_beginning(&Default::default(), window, cx);
 376            });
 377        });
 378    }
 379
 380    fn move_to_path(&mut self, path_key: PathKey, window: &mut Window, cx: &mut Context<Self>) {
 381        if let Some(position) = self.multibuffer.read(cx).location_for_path(&path_key, cx) {
 382            self.editor.update(cx, |editor, cx| {
 383                editor.primary_editor().update(cx, |editor, cx| {
 384                    editor.change_selections(
 385                        SelectionEffects::scroll(Autoscroll::focused()),
 386                        window,
 387                        cx,
 388                        |s| {
 389                            s.select_ranges([position..position]);
 390                        },
 391                    )
 392                })
 393            });
 394        } else {
 395            self.pending_scroll = Some(path_key);
 396        }
 397    }
 398
 399    fn button_states(&self, cx: &App) -> ButtonStates {
 400        let editor = self.editor.read(cx).primary_editor().read(cx);
 401        let snapshot = self.multibuffer.read(cx).snapshot(cx);
 402        let prev_next = snapshot.diff_hunks().nth(1).is_some();
 403        let mut selection = true;
 404
 405        let mut ranges = editor
 406            .selections
 407            .disjoint_anchor_ranges()
 408            .collect::<Vec<_>>();
 409        if !ranges.iter().any(|range| range.start != range.end) {
 410            selection = false;
 411            if let Some((excerpt_id, _, range)) = self
 412                .editor
 413                .read(cx)
 414                .primary_editor()
 415                .read(cx)
 416                .active_excerpt(cx)
 417            {
 418                ranges = vec![multi_buffer::Anchor::range_in_buffer(excerpt_id, range)];
 419            } else {
 420                ranges = Vec::default();
 421            }
 422        }
 423        let mut has_staged_hunks = false;
 424        let mut has_unstaged_hunks = false;
 425        for hunk in editor.diff_hunks_in_ranges(&ranges, &snapshot) {
 426            match hunk.status.secondary {
 427                DiffHunkSecondaryStatus::HasSecondaryHunk
 428                | DiffHunkSecondaryStatus::SecondaryHunkAdditionPending => {
 429                    has_unstaged_hunks = true;
 430                }
 431                DiffHunkSecondaryStatus::OverlapsWithSecondaryHunk => {
 432                    has_staged_hunks = true;
 433                    has_unstaged_hunks = true;
 434                }
 435                DiffHunkSecondaryStatus::NoSecondaryHunk
 436                | DiffHunkSecondaryStatus::SecondaryHunkRemovalPending => {
 437                    has_staged_hunks = true;
 438                }
 439            }
 440        }
 441        let mut stage_all = false;
 442        let mut unstage_all = false;
 443        self.workspace
 444            .read_with(cx, |workspace, cx| {
 445                if let Some(git_panel) = workspace.panel::<GitPanel>(cx) {
 446                    let git_panel = git_panel.read(cx);
 447                    stage_all = git_panel.can_stage_all();
 448                    unstage_all = git_panel.can_unstage_all();
 449                }
 450            })
 451            .ok();
 452
 453        ButtonStates {
 454            stage: has_unstaged_hunks,
 455            unstage: has_staged_hunks,
 456            prev_next,
 457            selection,
 458            stage_all,
 459            unstage_all,
 460        }
 461    }
 462
 463    fn handle_editor_event(
 464        &mut self,
 465        editor: &Entity<SplittableEditor>,
 466        event: &EditorEvent,
 467        window: &mut Window,
 468        cx: &mut Context<Self>,
 469    ) {
 470        match event {
 471            EditorEvent::SelectionsChanged { local: true } => {
 472                let Some(project_path) = self.active_path(cx) else {
 473                    return;
 474                };
 475                self.workspace
 476                    .update(cx, |workspace, cx| {
 477                        if let Some(git_panel) = workspace.panel::<GitPanel>(cx) {
 478                            git_panel.update(cx, |git_panel, cx| {
 479                                git_panel.select_entry_by_path(project_path, window, cx)
 480                            })
 481                        }
 482                    })
 483                    .ok();
 484            }
 485            EditorEvent::Saved => {
 486                self._task = cx.spawn_in(window, async move |this, cx| {
 487                    Self::refresh(this, RefreshReason::EditorSaved, cx).await
 488                });
 489            }
 490            _ => {}
 491        }
 492        if editor.focus_handle(cx).contains_focused(window, cx)
 493            && self.multibuffer.read(cx).is_empty()
 494        {
 495            self.focus_handle.focus(window, cx)
 496        }
 497    }
 498
 499    #[instrument(skip_all)]
 500    fn register_buffer(
 501        &mut self,
 502        path_key: PathKey,
 503        file_status: FileStatus,
 504        buffer: Entity<Buffer>,
 505        diff: Entity<BufferDiff>,
 506        window: &mut Window,
 507        cx: &mut Context<Self>,
 508    ) {
 509        let subscription = cx.subscribe_in(&diff, window, move |this, _, _, window, cx| {
 510            this._task = window.spawn(cx, {
 511                let this = cx.weak_entity();
 512                async |cx| Self::refresh(this, RefreshReason::DiffChanged, cx).await
 513            })
 514        });
 515        self.buffer_diff_subscriptions
 516            .insert(path_key.path.clone(), (diff.clone(), subscription));
 517
 518        // TODO(split-diff) we shouldn't have a conflict addon when split
 519        let conflict_addon = self
 520            .editor
 521            .read(cx)
 522            .primary_editor()
 523            .read(cx)
 524            .addon::<ConflictAddon>()
 525            .expect("project diff editor should have a conflict addon");
 526
 527        let snapshot = buffer.read(cx).snapshot();
 528        let diff_snapshot = diff.read(cx).snapshot(cx);
 529
 530        let excerpt_ranges = {
 531            let diff_hunk_ranges = diff_snapshot
 532                .hunks_intersecting_range(
 533                    Anchor::min_max_range_for_buffer(snapshot.remote_id()),
 534                    &snapshot,
 535                )
 536                .map(|diff_hunk| diff_hunk.buffer_range.to_point(&snapshot));
 537            let conflicts = conflict_addon
 538                .conflict_set(snapshot.remote_id())
 539                .map(|conflict_set| conflict_set.read(cx).snapshot().conflicts)
 540                .unwrap_or_default();
 541            let mut conflicts = conflicts
 542                .iter()
 543                .map(|conflict| conflict.range.to_point(&snapshot))
 544                .peekable();
 545
 546            if conflicts.peek().is_some() {
 547                conflicts.collect::<Vec<_>>()
 548            } else {
 549                diff_hunk_ranges.collect()
 550            }
 551        };
 552
 553        let (was_empty, is_excerpt_newly_added) = self.editor.update(cx, |editor, cx| {
 554            let was_empty = editor
 555                .primary_editor()
 556                .read(cx)
 557                .buffer()
 558                .read(cx)
 559                .is_empty();
 560            let (_, is_newly_added) = editor.set_excerpts_for_path(
 561                path_key.clone(),
 562                buffer,
 563                excerpt_ranges,
 564                multibuffer_context_lines(cx),
 565                diff,
 566                cx,
 567            );
 568            (was_empty, is_newly_added)
 569        });
 570
 571        self.editor.update(cx, |editor, cx| {
 572            editor.primary_editor().update(cx, |editor, cx| {
 573                if was_empty {
 574                    editor.change_selections(
 575                        SelectionEffects::no_scroll(),
 576                        window,
 577                        cx,
 578                        |selections| {
 579                            selections.select_ranges([
 580                                multi_buffer::Anchor::min()..multi_buffer::Anchor::min()
 581                            ])
 582                        },
 583                    );
 584                }
 585                if is_excerpt_newly_added
 586                    && (file_status.is_deleted()
 587                        || (file_status.is_untracked()
 588                            && GitPanelSettings::get_global(cx).collapse_untracked_diff))
 589                {
 590                    editor.fold_buffer(snapshot.text.remote_id(), cx)
 591                }
 592            })
 593        });
 594
 595        if self.multibuffer.read(cx).is_empty()
 596            && self
 597                .editor
 598                .read(cx)
 599                .focus_handle(cx)
 600                .contains_focused(window, cx)
 601        {
 602            self.focus_handle.focus(window, cx);
 603        } else if self.focus_handle.is_focused(window) && !self.multibuffer.read(cx).is_empty() {
 604            self.editor.update(cx, |editor, cx| {
 605                editor.focus_handle(cx).focus(window, cx);
 606            });
 607        }
 608        if self.pending_scroll.as_ref() == Some(&path_key) {
 609            self.move_to_path(path_key, window, cx);
 610        }
 611    }
 612
 613    pub async fn refresh(
 614        this: WeakEntity<Self>,
 615        reason: RefreshReason,
 616        cx: &mut AsyncWindowContext,
 617    ) -> Result<()> {
 618        let mut path_keys = Vec::new();
 619        let buffers_to_load = this.update(cx, |this, cx| {
 620            let (repo, buffers_to_load) = this.branch_diff.update(cx, |branch_diff, cx| {
 621                let load_buffers = branch_diff.load_buffers(cx);
 622                (branch_diff.repo().cloned(), load_buffers)
 623            });
 624            let mut previous_paths = this
 625                .multibuffer
 626                .read(cx)
 627                .paths()
 628                .cloned()
 629                .collect::<HashSet<_>>();
 630
 631            if let Some(repo) = repo {
 632                let repo = repo.read(cx);
 633
 634                path_keys = Vec::with_capacity(buffers_to_load.len());
 635                for entry in buffers_to_load.iter() {
 636                    let sort_prefix = sort_prefix(&repo, &entry.repo_path, entry.file_status, cx);
 637                    let path_key =
 638                        PathKey::with_sort_prefix(sort_prefix, entry.repo_path.as_ref().clone());
 639                    previous_paths.remove(&path_key);
 640                    path_keys.push(path_key)
 641                }
 642            }
 643
 644            this.editor.update(cx, |editor, cx| {
 645                for path in previous_paths {
 646                    if let Some(buffer) = this.multibuffer.read(cx).buffer_for_path(&path, cx) {
 647                        let skip = match reason {
 648                            RefreshReason::DiffChanged | RefreshReason::EditorSaved => {
 649                                buffer.read(cx).is_dirty()
 650                            }
 651                            RefreshReason::StatusesChanged => false,
 652                        };
 653                        if skip {
 654                            continue;
 655                        }
 656                    }
 657
 658                    this.buffer_diff_subscriptions.remove(&path.path);
 659                    editor.remove_excerpts_for_path(path, cx);
 660                }
 661            });
 662            buffers_to_load
 663        })?;
 664
 665        for (entry, path_key) in buffers_to_load.into_iter().zip(path_keys.into_iter()) {
 666            if let Some((buffer, diff)) = entry.load.await.log_err() {
 667                // We might be lagging behind enough that all future entry.load futures are no longer pending.
 668                // If that is the case, this task will never yield, starving the foreground thread of execution time.
 669                yield_now().await;
 670                cx.update(|window, cx| {
 671                    this.update(cx, |this, cx| {
 672                        let multibuffer = this.multibuffer.read(cx);
 673                        let skip = multibuffer.buffer(buffer.read(cx).remote_id()).is_some()
 674                            && multibuffer
 675                                .diff_for(buffer.read(cx).remote_id())
 676                                .is_some_and(|prev_diff| prev_diff.entity_id() == diff.entity_id())
 677                            && match reason {
 678                                RefreshReason::DiffChanged | RefreshReason::EditorSaved => {
 679                                    buffer.read(cx).is_dirty()
 680                                }
 681                                RefreshReason::StatusesChanged => false,
 682                            };
 683                        if !skip {
 684                            this.register_buffer(
 685                                path_key,
 686                                entry.file_status,
 687                                buffer,
 688                                diff,
 689                                window,
 690                                cx,
 691                            )
 692                        }
 693                    })
 694                    .ok();
 695                })?;
 696            }
 697        }
 698        this.update(cx, |this, cx| {
 699            this.pending_scroll.take();
 700            cx.notify();
 701        })?;
 702
 703        Ok(())
 704    }
 705
 706    #[cfg(any(test, feature = "test-support"))]
 707    pub fn excerpt_paths(&self, cx: &App) -> Vec<std::sync::Arc<util::rel_path::RelPath>> {
 708        self.multibuffer
 709            .read(cx)
 710            .paths()
 711            .map(|key| key.path.clone())
 712            .collect()
 713    }
 714}
 715
 716fn sort_prefix(repo: &Repository, repo_path: &RepoPath, status: FileStatus, cx: &App) -> u64 {
 717    let settings = GitPanelSettings::get_global(cx);
 718
 719    // Tree view can only sort by path
 720    if settings.sort_by_path || settings.tree_view {
 721        TRACKED_SORT_PREFIX
 722    } else if repo.had_conflict_on_last_merge_head_change(repo_path) {
 723        CONFLICT_SORT_PREFIX
 724    } else if status.is_created() {
 725        NEW_SORT_PREFIX
 726    } else {
 727        TRACKED_SORT_PREFIX
 728    }
 729}
 730
 731impl EventEmitter<EditorEvent> for ProjectDiff {}
 732
 733impl Focusable for ProjectDiff {
 734    fn focus_handle(&self, cx: &App) -> FocusHandle {
 735        if self.multibuffer.read(cx).is_empty() {
 736            self.focus_handle.clone()
 737        } else {
 738            self.editor.focus_handle(cx)
 739        }
 740    }
 741}
 742
 743impl Item for ProjectDiff {
 744    type Event = EditorEvent;
 745
 746    fn tab_icon(&self, _window: &Window, _cx: &App) -> Option<Icon> {
 747        Some(Icon::new(IconName::GitBranch).color(Color::Muted))
 748    }
 749
 750    fn to_item_events(event: &EditorEvent, f: impl FnMut(ItemEvent)) {
 751        Editor::to_item_events(event, f)
 752    }
 753
 754    fn deactivated(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 755        self.editor.update(cx, |editor, cx| {
 756            editor.primary_editor().update(cx, |primary_editor, cx| {
 757                primary_editor.deactivated(window, cx);
 758            })
 759        });
 760    }
 761
 762    fn navigate(
 763        &mut self,
 764        data: Box<dyn Any>,
 765        window: &mut Window,
 766        cx: &mut Context<Self>,
 767    ) -> bool {
 768        self.editor.update(cx, |editor, cx| {
 769            editor.primary_editor().update(cx, |primary_editor, cx| {
 770                primary_editor.navigate(data, window, cx)
 771            })
 772        })
 773    }
 774
 775    fn tab_tooltip_text(&self, _: &App) -> Option<SharedString> {
 776        Some("Project Diff".into())
 777    }
 778
 779    fn tab_content(&self, params: TabContentParams, _window: &Window, cx: &App) -> AnyElement {
 780        Label::new(self.tab_content_text(0, cx))
 781            .color(if params.selected {
 782                Color::Default
 783            } else {
 784                Color::Muted
 785            })
 786            .into_any_element()
 787    }
 788
 789    fn tab_content_text(&self, _detail: usize, cx: &App) -> SharedString {
 790        match self.branch_diff.read(cx).diff_base() {
 791            DiffBase::Head => "Uncommitted Changes".into(),
 792            DiffBase::Merge { base_ref } => format!("Changes since {}", base_ref).into(),
 793        }
 794    }
 795
 796    fn telemetry_event_text(&self) -> Option<&'static str> {
 797        Some("Project Diff Opened")
 798    }
 799
 800    fn as_searchable(&self, _: &Entity<Self>, cx: &App) -> Option<Box<dyn SearchableItemHandle>> {
 801        // TODO(split-diff) SplitEditor should be searchable
 802        Some(Box::new(self.editor.read(cx).primary_editor().clone()))
 803    }
 804
 805    fn for_each_project_item(
 806        &self,
 807        cx: &App,
 808        f: &mut dyn FnMut(gpui::EntityId, &dyn project::ProjectItem),
 809    ) {
 810        self.editor
 811            .read(cx)
 812            .primary_editor()
 813            .read(cx)
 814            .for_each_project_item(cx, f)
 815    }
 816
 817    fn set_nav_history(
 818        &mut self,
 819        nav_history: ItemNavHistory,
 820        _: &mut Window,
 821        cx: &mut Context<Self>,
 822    ) {
 823        self.editor.update(cx, |editor, cx| {
 824            editor.primary_editor().update(cx, |primary_editor, _| {
 825                primary_editor.set_nav_history(Some(nav_history));
 826            })
 827        });
 828    }
 829
 830    fn can_split(&self) -> bool {
 831        true
 832    }
 833
 834    fn clone_on_split(
 835        &self,
 836        _workspace_id: Option<workspace::WorkspaceId>,
 837        window: &mut Window,
 838        cx: &mut Context<Self>,
 839    ) -> Task<Option<Entity<Self>>>
 840    where
 841        Self: Sized,
 842    {
 843        let Some(workspace) = self.workspace.upgrade() else {
 844            return Task::ready(None);
 845        };
 846        Task::ready(Some(cx.new(|cx| {
 847            ProjectDiff::new(self.project.clone(), workspace, window, cx)
 848        })))
 849    }
 850
 851    fn is_dirty(&self, cx: &App) -> bool {
 852        self.multibuffer.read(cx).is_dirty(cx)
 853    }
 854
 855    fn has_conflict(&self, cx: &App) -> bool {
 856        self.multibuffer.read(cx).has_conflict(cx)
 857    }
 858
 859    fn can_save(&self, _: &App) -> bool {
 860        true
 861    }
 862
 863    fn save(
 864        &mut self,
 865        options: SaveOptions,
 866        project: Entity<Project>,
 867        window: &mut Window,
 868        cx: &mut Context<Self>,
 869    ) -> Task<Result<()>> {
 870        self.editor.update(cx, |editor, cx| {
 871            editor.primary_editor().update(cx, |primary_editor, cx| {
 872                primary_editor.save(options, project, window, cx)
 873            })
 874        })
 875    }
 876
 877    fn save_as(
 878        &mut self,
 879        _: Entity<Project>,
 880        _: ProjectPath,
 881        _window: &mut Window,
 882        _: &mut Context<Self>,
 883    ) -> Task<Result<()>> {
 884        unreachable!()
 885    }
 886
 887    fn reload(
 888        &mut self,
 889        project: Entity<Project>,
 890        window: &mut Window,
 891        cx: &mut Context<Self>,
 892    ) -> Task<Result<()>> {
 893        self.editor.update(cx, |editor, cx| {
 894            editor.primary_editor().update(cx, |primary_editor, cx| {
 895                primary_editor.reload(project, window, cx)
 896            })
 897        })
 898    }
 899
 900    fn act_as_type<'a>(
 901        &'a self,
 902        type_id: TypeId,
 903        self_handle: &'a Entity<Self>,
 904        cx: &'a App,
 905    ) -> Option<gpui::AnyEntity> {
 906        if type_id == TypeId::of::<Self>() {
 907            Some(self_handle.clone().into())
 908        } else if type_id == TypeId::of::<Editor>() {
 909            Some(self.editor.read(cx).primary_editor().clone().into())
 910        } else {
 911            None
 912        }
 913    }
 914
 915    fn added_to_workspace(
 916        &mut self,
 917        workspace: &mut Workspace,
 918        window: &mut Window,
 919        cx: &mut Context<Self>,
 920    ) {
 921        self.editor.update(cx, |editor, cx| {
 922            editor.added_to_workspace(workspace, window, cx)
 923        });
 924    }
 925}
 926
 927impl Render for ProjectDiff {
 928    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
 929        let is_empty = self.multibuffer.read(cx).is_empty();
 930
 931        div()
 932            .track_focus(&self.focus_handle)
 933            .key_context(if is_empty { "EmptyPane" } else { "GitDiff" })
 934            .bg(cx.theme().colors().editor_background)
 935            .flex()
 936            .items_center()
 937            .justify_center()
 938            .size_full()
 939            .when(is_empty, |el| {
 940                let remote_button = if let Some(panel) = self
 941                    .workspace
 942                    .upgrade()
 943                    .and_then(|workspace| workspace.read(cx).panel::<GitPanel>(cx))
 944                {
 945                    panel.update(cx, |panel, cx| panel.render_remote_button(cx))
 946                } else {
 947                    None
 948                };
 949                let keybinding_focus_handle = self.focus_handle(cx);
 950                el.child(
 951                    v_flex()
 952                        .gap_1()
 953                        .child(
 954                            h_flex()
 955                                .justify_around()
 956                                .child(Label::new("No uncommitted changes")),
 957                        )
 958                        .map(|el| match remote_button {
 959                            Some(button) => el.child(h_flex().justify_around().child(button)),
 960                            None => el.child(
 961                                h_flex()
 962                                    .justify_around()
 963                                    .child(Label::new("Remote up to date")),
 964                            ),
 965                        })
 966                        .child(
 967                            h_flex().justify_around().mt_1().child(
 968                                Button::new("project-diff-close-button", "Close")
 969                                    // .style(ButtonStyle::Transparent)
 970                                    .key_binding(KeyBinding::for_action_in(
 971                                        &CloseActiveItem::default(),
 972                                        &keybinding_focus_handle,
 973                                        cx,
 974                                    ))
 975                                    .on_click(move |_, window, cx| {
 976                                        window.focus(&keybinding_focus_handle, cx);
 977                                        window.dispatch_action(
 978                                            Box::new(CloseActiveItem::default()),
 979                                            cx,
 980                                        );
 981                                    }),
 982                            ),
 983                        ),
 984                )
 985            })
 986            .when(!is_empty, |el| el.child(self.editor.clone()))
 987    }
 988}
 989
 990impl SerializableItem for ProjectDiff {
 991    fn serialized_item_kind() -> &'static str {
 992        "ProjectDiff"
 993    }
 994
 995    fn cleanup(
 996        _: workspace::WorkspaceId,
 997        _: Vec<workspace::ItemId>,
 998        _: &mut Window,
 999        _: &mut App,
1000    ) -> Task<Result<()>> {
1001        Task::ready(Ok(()))
1002    }
1003
1004    fn deserialize(
1005        project: Entity<Project>,
1006        workspace: WeakEntity<Workspace>,
1007        workspace_id: workspace::WorkspaceId,
1008        item_id: workspace::ItemId,
1009        window: &mut Window,
1010        cx: &mut App,
1011    ) -> Task<Result<Entity<Self>>> {
1012        window.spawn(cx, async move |cx| {
1013            let diff_base = persistence::PROJECT_DIFF_DB.get_diff_base(item_id, workspace_id)?;
1014
1015            let diff = cx.update(|window, cx| {
1016                let branch_diff = cx
1017                    .new(|cx| branch_diff::BranchDiff::new(diff_base, project.clone(), window, cx));
1018                let workspace = workspace.upgrade().context("workspace gone")?;
1019                anyhow::Ok(
1020                    cx.new(|cx| ProjectDiff::new_impl(branch_diff, project, workspace, window, cx)),
1021                )
1022            })??;
1023
1024            Ok(diff)
1025        })
1026    }
1027
1028    fn serialize(
1029        &mut self,
1030        workspace: &mut Workspace,
1031        item_id: workspace::ItemId,
1032        _closing: bool,
1033        _window: &mut Window,
1034        cx: &mut Context<Self>,
1035    ) -> Option<Task<Result<()>>> {
1036        let workspace_id = workspace.database_id()?;
1037        let diff_base = self.diff_base(cx).clone();
1038
1039        Some(cx.background_spawn({
1040            async move {
1041                persistence::PROJECT_DIFF_DB
1042                    .save_diff_base(item_id, workspace_id, diff_base.clone())
1043                    .await
1044            }
1045        }))
1046    }
1047
1048    fn should_serialize(&self, _: &Self::Event) -> bool {
1049        false
1050    }
1051}
1052
1053mod persistence {
1054
1055    use anyhow::Context as _;
1056    use db::{
1057        sqlez::{domain::Domain, thread_safe_connection::ThreadSafeConnection},
1058        sqlez_macros::sql,
1059    };
1060    use project::git_store::branch_diff::DiffBase;
1061    use workspace::{ItemId, WorkspaceDb, WorkspaceId};
1062
1063    pub struct ProjectDiffDb(ThreadSafeConnection);
1064
1065    impl Domain for ProjectDiffDb {
1066        const NAME: &str = stringify!(ProjectDiffDb);
1067
1068        const MIGRATIONS: &[&str] = &[sql!(
1069                CREATE TABLE project_diffs(
1070                    workspace_id INTEGER,
1071                    item_id INTEGER UNIQUE,
1072
1073                    diff_base TEXT,
1074
1075                    PRIMARY KEY(workspace_id, item_id),
1076                    FOREIGN KEY(workspace_id) REFERENCES workspaces(workspace_id)
1077                    ON DELETE CASCADE
1078                ) STRICT;
1079        )];
1080    }
1081
1082    db::static_connection!(PROJECT_DIFF_DB, ProjectDiffDb, [WorkspaceDb]);
1083
1084    impl ProjectDiffDb {
1085        pub async fn save_diff_base(
1086            &self,
1087            item_id: ItemId,
1088            workspace_id: WorkspaceId,
1089            diff_base: DiffBase,
1090        ) -> anyhow::Result<()> {
1091            self.write(move |connection| {
1092                let sql_stmt = sql!(
1093                    INSERT OR REPLACE INTO project_diffs(item_id, workspace_id, diff_base) VALUES (?, ?, ?)
1094                );
1095                let diff_base_str = serde_json::to_string(&diff_base)?;
1096                let mut query = connection.exec_bound::<(ItemId, WorkspaceId, String)>(sql_stmt)?;
1097                query((item_id, workspace_id, diff_base_str)).context(format!(
1098                    "exec_bound failed to execute or parse for: {}",
1099                    sql_stmt
1100                ))
1101            })
1102            .await
1103        }
1104
1105        pub fn get_diff_base(
1106            &self,
1107            item_id: ItemId,
1108            workspace_id: WorkspaceId,
1109        ) -> anyhow::Result<DiffBase> {
1110            let sql_stmt =
1111                sql!(SELECT diff_base FROM project_diffs WHERE item_id =  ?AND workspace_id =  ?);
1112            let diff_base_str = self.select_row_bound::<(ItemId, WorkspaceId), String>(sql_stmt)?(
1113                (item_id, workspace_id),
1114            )
1115            .context(::std::format!(
1116                "Error in get_diff_base, select_row_bound failed to execute or parse for: {}",
1117                sql_stmt
1118            ))?;
1119            let Some(diff_base_str) = diff_base_str else {
1120                return Ok(DiffBase::Head);
1121            };
1122            serde_json::from_str(&diff_base_str).context("deserializing diff base")
1123        }
1124    }
1125}
1126
1127pub struct ProjectDiffToolbar {
1128    project_diff: Option<WeakEntity<ProjectDiff>>,
1129    workspace: WeakEntity<Workspace>,
1130}
1131
1132impl ProjectDiffToolbar {
1133    pub fn new(workspace: &Workspace, _: &mut Context<Self>) -> Self {
1134        Self {
1135            project_diff: None,
1136            workspace: workspace.weak_handle(),
1137        }
1138    }
1139
1140    fn project_diff(&self, _: &App) -> Option<Entity<ProjectDiff>> {
1141        self.project_diff.as_ref()?.upgrade()
1142    }
1143
1144    fn dispatch_action(&self, action: &dyn Action, window: &mut Window, cx: &mut Context<Self>) {
1145        if let Some(project_diff) = self.project_diff(cx) {
1146            project_diff.focus_handle(cx).focus(window, cx);
1147        }
1148        let action = action.boxed_clone();
1149        cx.defer(move |cx| {
1150            cx.dispatch_action(action.as_ref());
1151        })
1152    }
1153
1154    fn stage_all(&mut self, window: &mut Window, cx: &mut Context<Self>) {
1155        self.workspace
1156            .update(cx, |workspace, cx| {
1157                if let Some(panel) = workspace.panel::<GitPanel>(cx) {
1158                    panel.update(cx, |panel, cx| {
1159                        panel.stage_all(&Default::default(), window, cx);
1160                    });
1161                }
1162            })
1163            .ok();
1164    }
1165
1166    fn unstage_all(&mut self, window: &mut Window, cx: &mut Context<Self>) {
1167        self.workspace
1168            .update(cx, |workspace, cx| {
1169                let Some(panel) = workspace.panel::<GitPanel>(cx) else {
1170                    return;
1171                };
1172                panel.update(cx, |panel, cx| {
1173                    panel.unstage_all(&Default::default(), window, cx);
1174                });
1175            })
1176            .ok();
1177    }
1178}
1179
1180impl EventEmitter<ToolbarItemEvent> for ProjectDiffToolbar {}
1181
1182impl ToolbarItemView for ProjectDiffToolbar {
1183    fn set_active_pane_item(
1184        &mut self,
1185        active_pane_item: Option<&dyn ItemHandle>,
1186        _: &mut Window,
1187        cx: &mut Context<Self>,
1188    ) -> ToolbarItemLocation {
1189        self.project_diff = active_pane_item
1190            .and_then(|item| item.act_as::<ProjectDiff>(cx))
1191            .filter(|item| item.read(cx).diff_base(cx) == &DiffBase::Head)
1192            .map(|entity| entity.downgrade());
1193        if self.project_diff.is_some() {
1194            ToolbarItemLocation::PrimaryRight
1195        } else {
1196            ToolbarItemLocation::Hidden
1197        }
1198    }
1199
1200    fn pane_focus_update(
1201        &mut self,
1202        _pane_focused: bool,
1203        _window: &mut Window,
1204        _cx: &mut Context<Self>,
1205    ) {
1206    }
1207}
1208
1209struct ButtonStates {
1210    stage: bool,
1211    unstage: bool,
1212    prev_next: bool,
1213    selection: bool,
1214    stage_all: bool,
1215    unstage_all: bool,
1216}
1217
1218impl Render for ProjectDiffToolbar {
1219    fn render(&mut self, _: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
1220        let Some(project_diff) = self.project_diff(cx) else {
1221            return div();
1222        };
1223        let focus_handle = project_diff.focus_handle(cx);
1224        let button_states = project_diff.read(cx).button_states(cx);
1225
1226        h_group_xl()
1227            .my_neg_1()
1228            .py_1()
1229            .items_center()
1230            .flex_wrap()
1231            .justify_between()
1232            .child(
1233                h_group_sm()
1234                    .when(button_states.selection, |el| {
1235                        el.child(
1236                            Button::new("stage", "Toggle Staged")
1237                                .tooltip(Tooltip::for_action_title_in(
1238                                    "Toggle Staged",
1239                                    &ToggleStaged,
1240                                    &focus_handle,
1241                                ))
1242                                .disabled(!button_states.stage && !button_states.unstage)
1243                                .on_click(cx.listener(|this, _, window, cx| {
1244                                    this.dispatch_action(&ToggleStaged, window, cx)
1245                                })),
1246                        )
1247                    })
1248                    .when(!button_states.selection, |el| {
1249                        el.child(
1250                            Button::new("stage", "Stage")
1251                                .tooltip(Tooltip::for_action_title_in(
1252                                    "Stage and go to next hunk",
1253                                    &StageAndNext,
1254                                    &focus_handle,
1255                                ))
1256                                .disabled(
1257                                    !button_states.prev_next
1258                                        && !button_states.stage_all
1259                                        && !button_states.unstage_all,
1260                                )
1261                                .on_click(cx.listener(|this, _, window, cx| {
1262                                    this.dispatch_action(&StageAndNext, window, cx)
1263                                })),
1264                        )
1265                        .child(
1266                            Button::new("unstage", "Unstage")
1267                                .tooltip(Tooltip::for_action_title_in(
1268                                    "Unstage and go to next hunk",
1269                                    &UnstageAndNext,
1270                                    &focus_handle,
1271                                ))
1272                                .disabled(
1273                                    !button_states.prev_next
1274                                        && !button_states.stage_all
1275                                        && !button_states.unstage_all,
1276                                )
1277                                .on_click(cx.listener(|this, _, window, cx| {
1278                                    this.dispatch_action(&UnstageAndNext, window, cx)
1279                                })),
1280                        )
1281                    }),
1282            )
1283            // n.b. the only reason these arrows are here is because we don't
1284            // support "undo" for staging so we need a way to go back.
1285            .child(
1286                h_group_sm()
1287                    .child(
1288                        IconButton::new("up", IconName::ArrowUp)
1289                            .shape(ui::IconButtonShape::Square)
1290                            .tooltip(Tooltip::for_action_title_in(
1291                                "Go to previous hunk",
1292                                &GoToPreviousHunk,
1293                                &focus_handle,
1294                            ))
1295                            .disabled(!button_states.prev_next)
1296                            .on_click(cx.listener(|this, _, window, cx| {
1297                                this.dispatch_action(&GoToPreviousHunk, window, cx)
1298                            })),
1299                    )
1300                    .child(
1301                        IconButton::new("down", IconName::ArrowDown)
1302                            .shape(ui::IconButtonShape::Square)
1303                            .tooltip(Tooltip::for_action_title_in(
1304                                "Go to next hunk",
1305                                &GoToHunk,
1306                                &focus_handle,
1307                            ))
1308                            .disabled(!button_states.prev_next)
1309                            .on_click(cx.listener(|this, _, window, cx| {
1310                                this.dispatch_action(&GoToHunk, window, cx)
1311                            })),
1312                    ),
1313            )
1314            .child(vertical_divider())
1315            .child(
1316                h_group_sm()
1317                    .when(
1318                        button_states.unstage_all && !button_states.stage_all,
1319                        |el| {
1320                            el.child(
1321                                Button::new("unstage-all", "Unstage All")
1322                                    .tooltip(Tooltip::for_action_title_in(
1323                                        "Unstage all changes",
1324                                        &UnstageAll,
1325                                        &focus_handle,
1326                                    ))
1327                                    .on_click(cx.listener(|this, _, window, cx| {
1328                                        this.unstage_all(window, cx)
1329                                    })),
1330                            )
1331                        },
1332                    )
1333                    .when(
1334                        !button_states.unstage_all || button_states.stage_all,
1335                        |el| {
1336                            el.child(
1337                                // todo make it so that changing to say "Unstaged"
1338                                // doesn't change the position.
1339                                div().child(
1340                                    Button::new("stage-all", "Stage All")
1341                                        .disabled(!button_states.stage_all)
1342                                        .tooltip(Tooltip::for_action_title_in(
1343                                            "Stage all changes",
1344                                            &StageAll,
1345                                            &focus_handle,
1346                                        ))
1347                                        .on_click(cx.listener(|this, _, window, cx| {
1348                                            this.stage_all(window, cx)
1349                                        })),
1350                                ),
1351                            )
1352                        },
1353                    )
1354                    .child(
1355                        Button::new("commit", "Commit")
1356                            .tooltip(Tooltip::for_action_title_in(
1357                                "Commit",
1358                                &Commit,
1359                                &focus_handle,
1360                            ))
1361                            .on_click(cx.listener(|this, _, window, cx| {
1362                                this.dispatch_action(&Commit, window, cx);
1363                            })),
1364                    ),
1365            )
1366    }
1367}
1368
1369#[derive(IntoElement, RegisterComponent)]
1370pub struct ProjectDiffEmptyState {
1371    pub no_repo: bool,
1372    pub can_push_and_pull: bool,
1373    pub focus_handle: Option<FocusHandle>,
1374    pub current_branch: Option<Branch>,
1375    // has_pending_commits: bool,
1376    // ahead_of_remote: bool,
1377    // no_git_repository: bool,
1378}
1379
1380impl RenderOnce for ProjectDiffEmptyState {
1381    fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
1382        let status_against_remote = |ahead_by: usize, behind_by: usize| -> bool {
1383            matches!(self.current_branch, Some(Branch {
1384                    upstream:
1385                        Some(Upstream {
1386                            tracking:
1387                                UpstreamTracking::Tracked(UpstreamTrackingStatus {
1388                                    ahead, behind, ..
1389                                }),
1390                            ..
1391                        }),
1392                    ..
1393                }) if (ahead > 0) == (ahead_by > 0) && (behind > 0) == (behind_by > 0))
1394        };
1395
1396        let change_count = |current_branch: &Branch| -> (usize, usize) {
1397            match current_branch {
1398                Branch {
1399                    upstream:
1400                        Some(Upstream {
1401                            tracking:
1402                                UpstreamTracking::Tracked(UpstreamTrackingStatus {
1403                                    ahead, behind, ..
1404                                }),
1405                            ..
1406                        }),
1407                    ..
1408                } => (*ahead as usize, *behind as usize),
1409                _ => (0, 0),
1410            }
1411        };
1412
1413        let not_ahead_or_behind = status_against_remote(0, 0);
1414        let ahead_of_remote = status_against_remote(1, 0);
1415        let branch_not_on_remote = if let Some(branch) = self.current_branch.as_ref() {
1416            branch.upstream.is_none()
1417        } else {
1418            false
1419        };
1420
1421        let has_branch_container = |branch: &Branch| {
1422            h_flex()
1423                .max_w(px(420.))
1424                .bg(cx.theme().colors().text.opacity(0.05))
1425                .border_1()
1426                .border_color(cx.theme().colors().border)
1427                .rounded_sm()
1428                .gap_8()
1429                .px_6()
1430                .py_4()
1431                .map(|this| {
1432                    if ahead_of_remote {
1433                        let ahead_count = change_count(branch).0;
1434                        let ahead_string = format!("{} Commits Ahead", ahead_count);
1435                        this.child(
1436                            v_flex()
1437                                .child(Headline::new(ahead_string).size(HeadlineSize::Small))
1438                                .child(
1439                                    Label::new(format!("Push your changes to {}", branch.name()))
1440                                        .color(Color::Muted),
1441                                ),
1442                        )
1443                        .child(div().child(render_push_button(
1444                            self.focus_handle,
1445                            "push".into(),
1446                            ahead_count as u32,
1447                        )))
1448                    } else if branch_not_on_remote {
1449                        this.child(
1450                            v_flex()
1451                                .child(Headline::new("Publish Branch").size(HeadlineSize::Small))
1452                                .child(
1453                                    Label::new(format!("Create {} on remote", branch.name()))
1454                                        .color(Color::Muted),
1455                                ),
1456                        )
1457                        .child(
1458                            div().child(render_publish_button(self.focus_handle, "publish".into())),
1459                        )
1460                    } else {
1461                        this.child(Label::new("Remote status unknown").color(Color::Muted))
1462                    }
1463                })
1464        };
1465
1466        v_flex().size_full().items_center().justify_center().child(
1467            v_flex()
1468                .gap_1()
1469                .when(self.no_repo, |this| {
1470                    // TODO: add git init
1471                    this.text_center()
1472                        .child(Label::new("No Repository").color(Color::Muted))
1473                })
1474                .map(|this| {
1475                    if not_ahead_or_behind && self.current_branch.is_some() {
1476                        this.text_center()
1477                            .child(Label::new("No Changes").color(Color::Muted))
1478                    } else {
1479                        this.when_some(self.current_branch.as_ref(), |this, branch| {
1480                            this.child(has_branch_container(branch))
1481                        })
1482                    }
1483                }),
1484        )
1485    }
1486}
1487
1488mod preview {
1489    use git::repository::{
1490        Branch, CommitSummary, Upstream, UpstreamTracking, UpstreamTrackingStatus,
1491    };
1492    use ui::prelude::*;
1493
1494    use super::ProjectDiffEmptyState;
1495
1496    // View this component preview using `workspace: open component-preview`
1497    impl Component for ProjectDiffEmptyState {
1498        fn scope() -> ComponentScope {
1499            ComponentScope::VersionControl
1500        }
1501
1502        fn preview(_window: &mut Window, _cx: &mut App) -> Option<AnyElement> {
1503            let unknown_upstream: Option<UpstreamTracking> = None;
1504            let ahead_of_upstream: Option<UpstreamTracking> = Some(
1505                UpstreamTrackingStatus {
1506                    ahead: 2,
1507                    behind: 0,
1508                }
1509                .into(),
1510            );
1511
1512            let not_ahead_or_behind_upstream: Option<UpstreamTracking> = Some(
1513                UpstreamTrackingStatus {
1514                    ahead: 0,
1515                    behind: 0,
1516                }
1517                .into(),
1518            );
1519
1520            fn branch(upstream: Option<UpstreamTracking>) -> Branch {
1521                Branch {
1522                    is_head: true,
1523                    ref_name: "some-branch".into(),
1524                    upstream: upstream.map(|tracking| Upstream {
1525                        ref_name: "origin/some-branch".into(),
1526                        tracking,
1527                    }),
1528                    most_recent_commit: Some(CommitSummary {
1529                        sha: "abc123".into(),
1530                        subject: "Modify stuff".into(),
1531                        commit_timestamp: 1710932954,
1532                        author_name: "John Doe".into(),
1533                        has_parent: true,
1534                    }),
1535                }
1536            }
1537
1538            let no_repo_state = ProjectDiffEmptyState {
1539                no_repo: true,
1540                can_push_and_pull: false,
1541                focus_handle: None,
1542                current_branch: None,
1543            };
1544
1545            let no_changes_state = ProjectDiffEmptyState {
1546                no_repo: false,
1547                can_push_and_pull: true,
1548                focus_handle: None,
1549                current_branch: Some(branch(not_ahead_or_behind_upstream)),
1550            };
1551
1552            let ahead_of_upstream_state = ProjectDiffEmptyState {
1553                no_repo: false,
1554                can_push_and_pull: true,
1555                focus_handle: None,
1556                current_branch: Some(branch(ahead_of_upstream)),
1557            };
1558
1559            let unknown_upstream_state = ProjectDiffEmptyState {
1560                no_repo: false,
1561                can_push_and_pull: true,
1562                focus_handle: None,
1563                current_branch: Some(branch(unknown_upstream)),
1564            };
1565
1566            let (width, height) = (px(480.), px(320.));
1567
1568            Some(
1569                v_flex()
1570                    .gap_6()
1571                    .children(vec![
1572                        example_group(vec![
1573                            single_example(
1574                                "No Repo",
1575                                div()
1576                                    .w(width)
1577                                    .h(height)
1578                                    .child(no_repo_state)
1579                                    .into_any_element(),
1580                            ),
1581                            single_example(
1582                                "No Changes",
1583                                div()
1584                                    .w(width)
1585                                    .h(height)
1586                                    .child(no_changes_state)
1587                                    .into_any_element(),
1588                            ),
1589                            single_example(
1590                                "Unknown Upstream",
1591                                div()
1592                                    .w(width)
1593                                    .h(height)
1594                                    .child(unknown_upstream_state)
1595                                    .into_any_element(),
1596                            ),
1597                            single_example(
1598                                "Ahead of Remote",
1599                                div()
1600                                    .w(width)
1601                                    .h(height)
1602                                    .child(ahead_of_upstream_state)
1603                                    .into_any_element(),
1604                            ),
1605                        ])
1606                        .vertical(),
1607                    ])
1608                    .into_any_element(),
1609            )
1610        }
1611    }
1612}
1613
1614struct BranchDiffAddon {
1615    branch_diff: Entity<branch_diff::BranchDiff>,
1616}
1617
1618impl Addon for BranchDiffAddon {
1619    fn to_any(&self) -> &dyn std::any::Any {
1620        self
1621    }
1622
1623    fn override_status_for_buffer_id(
1624        &self,
1625        buffer_id: language::BufferId,
1626        cx: &App,
1627    ) -> Option<FileStatus> {
1628        self.branch_diff
1629            .read(cx)
1630            .status_for_buffer_id(buffer_id, cx)
1631    }
1632}
1633
1634#[cfg(test)]
1635mod tests {
1636    use collections::HashMap;
1637    use db::indoc;
1638    use editor::test::editor_test_context::{EditorTestContext, assert_state_with_diff};
1639    use git::status::{TrackedStatus, UnmergedStatus, UnmergedStatusCode};
1640    use gpui::TestAppContext;
1641    use project::FakeFs;
1642    use serde_json::json;
1643    use settings::SettingsStore;
1644    use std::path::Path;
1645    use unindent::Unindent as _;
1646    use util::{
1647        path,
1648        rel_path::{RelPath, rel_path},
1649    };
1650
1651    use super::*;
1652
1653    #[ctor::ctor]
1654    fn init_logger() {
1655        zlog::init_test();
1656    }
1657
1658    fn init_test(cx: &mut TestAppContext) {
1659        cx.update(|cx| {
1660            let store = SettingsStore::test(cx);
1661            cx.set_global(store);
1662            theme::init(theme::LoadThemes::JustBase, cx);
1663            editor::init(cx);
1664            crate::init(cx);
1665        });
1666    }
1667
1668    #[gpui::test]
1669    async fn test_save_after_restore(cx: &mut TestAppContext) {
1670        init_test(cx);
1671
1672        let fs = FakeFs::new(cx.executor());
1673        fs.insert_tree(
1674            path!("/project"),
1675            json!({
1676                ".git": {},
1677                "foo.txt": "FOO\n",
1678            }),
1679        )
1680        .await;
1681        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
1682
1683        fs.set_head_for_repo(
1684            path!("/project/.git").as_ref(),
1685            &[("foo.txt", "foo\n".into())],
1686            "deadbeef",
1687        );
1688        fs.set_index_for_repo(
1689            path!("/project/.git").as_ref(),
1690            &[("foo.txt", "foo\n".into())],
1691        );
1692
1693        let (workspace, cx) =
1694            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1695        let diff = cx.new_window_entity(|window, cx| {
1696            ProjectDiff::new(project.clone(), workspace, window, cx)
1697        });
1698        cx.run_until_parked();
1699
1700        let editor = diff.read_with(cx, |diff, cx| diff.editor.read(cx).primary_editor().clone());
1701        assert_state_with_diff(
1702            &editor,
1703            cx,
1704            &"
1705                - ˇfoo
1706                + FOO
1707            "
1708            .unindent(),
1709        );
1710
1711        editor
1712            .update_in(cx, |editor, window, cx| {
1713                editor.git_restore(&Default::default(), window, cx);
1714                editor.save(SaveOptions::default(), project.clone(), window, cx)
1715            })
1716            .await
1717            .unwrap();
1718        cx.run_until_parked();
1719
1720        assert_state_with_diff(&editor, cx, &"ˇ".unindent());
1721
1722        let text = String::from_utf8(fs.read_file_sync("/project/foo.txt").unwrap()).unwrap();
1723        assert_eq!(text, "foo\n");
1724    }
1725
1726    #[gpui::test]
1727    async fn test_scroll_to_beginning_with_deletion(cx: &mut TestAppContext) {
1728        init_test(cx);
1729
1730        let fs = FakeFs::new(cx.executor());
1731        fs.insert_tree(
1732            path!("/project"),
1733            json!({
1734                ".git": {},
1735                "bar": "BAR\n",
1736                "foo": "FOO\n",
1737            }),
1738        )
1739        .await;
1740        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
1741        let (workspace, cx) =
1742            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1743        let diff = cx.new_window_entity(|window, cx| {
1744            ProjectDiff::new(project.clone(), workspace, window, cx)
1745        });
1746        cx.run_until_parked();
1747
1748        fs.set_head_and_index_for_repo(
1749            path!("/project/.git").as_ref(),
1750            &[("bar", "bar\n".into()), ("foo", "foo\n".into())],
1751        );
1752        cx.run_until_parked();
1753
1754        let editor = cx.update_window_entity(&diff, |diff, window, cx| {
1755            diff.move_to_path(
1756                PathKey::with_sort_prefix(TRACKED_SORT_PREFIX, rel_path("foo").into_arc()),
1757                window,
1758                cx,
1759            );
1760            diff.editor.read(cx).primary_editor().clone()
1761        });
1762        assert_state_with_diff(
1763            &editor,
1764            cx,
1765            &"
1766                - bar
1767                + BAR
1768
1769                - ˇfoo
1770                + FOO
1771            "
1772            .unindent(),
1773        );
1774
1775        let editor = cx.update_window_entity(&diff, |diff, window, cx| {
1776            diff.move_to_path(
1777                PathKey::with_sort_prefix(TRACKED_SORT_PREFIX, rel_path("bar").into_arc()),
1778                window,
1779                cx,
1780            );
1781            diff.editor.read(cx).primary_editor().clone()
1782        });
1783        assert_state_with_diff(
1784            &editor,
1785            cx,
1786            &"
1787                - ˇbar
1788                + BAR
1789
1790                - foo
1791                + FOO
1792            "
1793            .unindent(),
1794        );
1795    }
1796
1797    #[gpui::test]
1798    async fn test_hunks_after_restore_then_modify(cx: &mut TestAppContext) {
1799        init_test(cx);
1800
1801        let fs = FakeFs::new(cx.executor());
1802        fs.insert_tree(
1803            path!("/project"),
1804            json!({
1805                ".git": {},
1806                "foo": "modified\n",
1807            }),
1808        )
1809        .await;
1810        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
1811        let (workspace, cx) =
1812            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1813        fs.set_head_for_repo(
1814            path!("/project/.git").as_ref(),
1815            &[("foo", "original\n".into())],
1816            "deadbeef",
1817        );
1818
1819        let buffer = project
1820            .update(cx, |project, cx| {
1821                project.open_local_buffer(path!("/project/foo"), cx)
1822            })
1823            .await
1824            .unwrap();
1825        let buffer_editor = cx.new_window_entity(|window, cx| {
1826            Editor::for_buffer(buffer, Some(project.clone()), window, cx)
1827        });
1828        let diff = cx.new_window_entity(|window, cx| {
1829            ProjectDiff::new(project.clone(), workspace, window, cx)
1830        });
1831        cx.run_until_parked();
1832
1833        let diff_editor =
1834            diff.read_with(cx, |diff, cx| diff.editor.read(cx).primary_editor().clone());
1835
1836        assert_state_with_diff(
1837            &diff_editor,
1838            cx,
1839            &"
1840                - ˇoriginal
1841                + modified
1842            "
1843            .unindent(),
1844        );
1845
1846        let prev_buffer_hunks =
1847            cx.update_window_entity(&buffer_editor, |buffer_editor, window, cx| {
1848                let snapshot = buffer_editor.snapshot(window, cx);
1849                let snapshot = &snapshot.buffer_snapshot();
1850                let prev_buffer_hunks = buffer_editor
1851                    .diff_hunks_in_ranges(&[editor::Anchor::min()..editor::Anchor::max()], snapshot)
1852                    .collect::<Vec<_>>();
1853                buffer_editor.git_restore(&Default::default(), window, cx);
1854                prev_buffer_hunks
1855            });
1856        assert_eq!(prev_buffer_hunks.len(), 1);
1857        cx.run_until_parked();
1858
1859        let new_buffer_hunks =
1860            cx.update_window_entity(&buffer_editor, |buffer_editor, window, cx| {
1861                let snapshot = buffer_editor.snapshot(window, cx);
1862                let snapshot = &snapshot.buffer_snapshot();
1863                buffer_editor
1864                    .diff_hunks_in_ranges(&[editor::Anchor::min()..editor::Anchor::max()], snapshot)
1865                    .collect::<Vec<_>>()
1866            });
1867        assert_eq!(new_buffer_hunks.as_slice(), &[]);
1868
1869        cx.update_window_entity(&buffer_editor, |buffer_editor, window, cx| {
1870            buffer_editor.set_text("different\n", window, cx);
1871            buffer_editor.save(
1872                SaveOptions {
1873                    format: false,
1874                    autosave: false,
1875                },
1876                project.clone(),
1877                window,
1878                cx,
1879            )
1880        })
1881        .await
1882        .unwrap();
1883
1884        cx.run_until_parked();
1885
1886        cx.update_window_entity(&buffer_editor, |buffer_editor, window, cx| {
1887            buffer_editor.expand_all_diff_hunks(&Default::default(), window, cx);
1888        });
1889
1890        assert_state_with_diff(
1891            &buffer_editor,
1892            cx,
1893            &"
1894                - original
1895                + different
1896                  ˇ"
1897            .unindent(),
1898        );
1899
1900        assert_state_with_diff(
1901            &diff_editor,
1902            cx,
1903            &"
1904                - ˇoriginal
1905                + different
1906            "
1907            .unindent(),
1908        );
1909    }
1910
1911    use crate::{
1912        conflict_view::resolve_conflict,
1913        project_diff::{self, ProjectDiff},
1914    };
1915
1916    #[gpui::test]
1917    async fn test_go_to_prev_hunk_multibuffer(cx: &mut TestAppContext) {
1918        init_test(cx);
1919
1920        let fs = FakeFs::new(cx.executor());
1921        fs.insert_tree(
1922            path!("/a"),
1923            json!({
1924                ".git": {},
1925                "a.txt": "created\n",
1926                "b.txt": "really changed\n",
1927                "c.txt": "unchanged\n"
1928            }),
1929        )
1930        .await;
1931
1932        fs.set_head_and_index_for_repo(
1933            Path::new(path!("/a/.git")),
1934            &[
1935                ("b.txt", "before\n".to_string()),
1936                ("c.txt", "unchanged\n".to_string()),
1937                ("d.txt", "deleted\n".to_string()),
1938            ],
1939        );
1940
1941        let project = Project::test(fs, [Path::new(path!("/a"))], cx).await;
1942        let (workspace, cx) =
1943            cx.add_window_view(|window, cx| Workspace::test_new(project, window, cx));
1944
1945        cx.run_until_parked();
1946
1947        cx.focus(&workspace);
1948        cx.update(|window, cx| {
1949            window.dispatch_action(project_diff::Diff.boxed_clone(), cx);
1950        });
1951
1952        cx.run_until_parked();
1953
1954        let item = workspace.update(cx, |workspace, cx| {
1955            workspace.active_item_as::<ProjectDiff>(cx).unwrap()
1956        });
1957        cx.focus(&item);
1958        let editor = item.read_with(cx, |item, cx| item.editor.read(cx).primary_editor().clone());
1959
1960        let mut cx = EditorTestContext::for_editor_in(editor, cx).await;
1961
1962        cx.assert_excerpts_with_selections(indoc!(
1963            "
1964            [EXCERPT]
1965            before
1966            really changed
1967            [EXCERPT]
1968            [FOLDED]
1969            [EXCERPT]
1970            ˇcreated
1971        "
1972        ));
1973
1974        cx.dispatch_action(editor::actions::GoToPreviousHunk);
1975
1976        cx.assert_excerpts_with_selections(indoc!(
1977            "
1978            [EXCERPT]
1979            before
1980            really changed
1981            [EXCERPT]
1982            ˇ[FOLDED]
1983            [EXCERPT]
1984            created
1985        "
1986        ));
1987
1988        cx.dispatch_action(editor::actions::GoToPreviousHunk);
1989
1990        cx.assert_excerpts_with_selections(indoc!(
1991            "
1992            [EXCERPT]
1993            ˇbefore
1994            really changed
1995            [EXCERPT]
1996            [FOLDED]
1997            [EXCERPT]
1998            created
1999        "
2000        ));
2001    }
2002
2003    #[gpui::test]
2004    async fn test_excerpts_splitting_after_restoring_the_middle_excerpt(cx: &mut TestAppContext) {
2005        init_test(cx);
2006
2007        let git_contents = indoc! {r#"
2008            #[rustfmt::skip]
2009            fn main() {
2010                let x = 0.0; // this line will be removed
2011                // 1
2012                // 2
2013                // 3
2014                let y = 0.0; // this line will be removed
2015                // 1
2016                // 2
2017                // 3
2018                let arr = [
2019                    0.0, // this line will be removed
2020                    0.0, // this line will be removed
2021                    0.0, // this line will be removed
2022                    0.0, // this line will be removed
2023                ];
2024            }
2025        "#};
2026        let buffer_contents = indoc! {"
2027            #[rustfmt::skip]
2028            fn main() {
2029                // 1
2030                // 2
2031                // 3
2032                // 1
2033                // 2
2034                // 3
2035                let arr = [
2036                ];
2037            }
2038        "};
2039
2040        let fs = FakeFs::new(cx.executor());
2041        fs.insert_tree(
2042            path!("/a"),
2043            json!({
2044                ".git": {},
2045                "main.rs": buffer_contents,
2046            }),
2047        )
2048        .await;
2049
2050        fs.set_head_and_index_for_repo(
2051            Path::new(path!("/a/.git")),
2052            &[("main.rs", git_contents.to_owned())],
2053        );
2054
2055        let project = Project::test(fs, [Path::new(path!("/a"))], cx).await;
2056        let (workspace, cx) =
2057            cx.add_window_view(|window, cx| Workspace::test_new(project, window, cx));
2058
2059        cx.run_until_parked();
2060
2061        cx.focus(&workspace);
2062        cx.update(|window, cx| {
2063            window.dispatch_action(project_diff::Diff.boxed_clone(), cx);
2064        });
2065
2066        cx.run_until_parked();
2067
2068        let item = workspace.update(cx, |workspace, cx| {
2069            workspace.active_item_as::<ProjectDiff>(cx).unwrap()
2070        });
2071        cx.focus(&item);
2072        let editor = item.read_with(cx, |item, cx| item.editor.read(cx).primary_editor().clone());
2073
2074        let mut cx = EditorTestContext::for_editor_in(editor, cx).await;
2075
2076        cx.assert_excerpts_with_selections(&format!("[EXCERPT]\nˇ{git_contents}"));
2077
2078        cx.dispatch_action(editor::actions::GoToHunk);
2079        cx.dispatch_action(editor::actions::GoToHunk);
2080        cx.dispatch_action(git::Restore);
2081        cx.dispatch_action(editor::actions::MoveToBeginning);
2082
2083        cx.assert_excerpts_with_selections(&format!("[EXCERPT]\nˇ{git_contents}"));
2084    }
2085
2086    #[gpui::test]
2087    async fn test_saving_resolved_conflicts(cx: &mut TestAppContext) {
2088        init_test(cx);
2089
2090        let fs = FakeFs::new(cx.executor());
2091        fs.insert_tree(
2092            path!("/project"),
2093            json!({
2094                ".git": {},
2095                "foo": "<<<<<<< x\nours\n=======\ntheirs\n>>>>>>> y\n",
2096            }),
2097        )
2098        .await;
2099        fs.set_status_for_repo(
2100            Path::new(path!("/project/.git")),
2101            &[(
2102                "foo",
2103                UnmergedStatus {
2104                    first_head: UnmergedStatusCode::Updated,
2105                    second_head: UnmergedStatusCode::Updated,
2106                }
2107                .into(),
2108            )],
2109        );
2110        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
2111        let (workspace, cx) =
2112            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2113        let diff = cx.new_window_entity(|window, cx| {
2114            ProjectDiff::new(project.clone(), workspace, window, cx)
2115        });
2116        cx.run_until_parked();
2117
2118        cx.update(|window, cx| {
2119            let editor = diff.read(cx).editor.read(cx).primary_editor().clone();
2120            let excerpt_ids = editor.read(cx).buffer().read(cx).excerpt_ids();
2121            assert_eq!(excerpt_ids.len(), 1);
2122            let excerpt_id = excerpt_ids[0];
2123            let buffer = editor
2124                .read(cx)
2125                .buffer()
2126                .read(cx)
2127                .all_buffers()
2128                .into_iter()
2129                .next()
2130                .unwrap();
2131            let buffer_id = buffer.read(cx).remote_id();
2132            let conflict_set = diff
2133                .read(cx)
2134                .editor
2135                .read(cx)
2136                .primary_editor()
2137                .read(cx)
2138                .addon::<ConflictAddon>()
2139                .unwrap()
2140                .conflict_set(buffer_id)
2141                .unwrap();
2142            assert!(conflict_set.read(cx).has_conflict);
2143            let snapshot = conflict_set.read(cx).snapshot();
2144            assert_eq!(snapshot.conflicts.len(), 1);
2145
2146            let ours_range = snapshot.conflicts[0].ours.clone();
2147
2148            resolve_conflict(
2149                editor.downgrade(),
2150                excerpt_id,
2151                snapshot.conflicts[0].clone(),
2152                vec![ours_range],
2153                window,
2154                cx,
2155            )
2156        })
2157        .await;
2158
2159        let contents = fs.read_file_sync(path!("/project/foo")).unwrap();
2160        let contents = String::from_utf8(contents).unwrap();
2161        assert_eq!(contents, "ours\n");
2162    }
2163
2164    #[gpui::test]
2165    async fn test_new_hunk_in_modified_file(cx: &mut TestAppContext) {
2166        init_test(cx);
2167
2168        let fs = FakeFs::new(cx.executor());
2169        fs.insert_tree(
2170            path!("/project"),
2171            json!({
2172                ".git": {},
2173                "foo.txt": "
2174                    one
2175                    two
2176                    three
2177                    four
2178                    five
2179                    six
2180                    seven
2181                    eight
2182                    nine
2183                    ten
2184                    ELEVEN
2185                    twelve
2186                ".unindent()
2187            }),
2188        )
2189        .await;
2190        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
2191        let (workspace, cx) =
2192            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2193        let diff = cx.new_window_entity(|window, cx| {
2194            ProjectDiff::new(project.clone(), workspace, window, cx)
2195        });
2196        cx.run_until_parked();
2197
2198        fs.set_head_and_index_for_repo(
2199            Path::new(path!("/project/.git")),
2200            &[(
2201                "foo.txt",
2202                "
2203                    one
2204                    two
2205                    three
2206                    four
2207                    five
2208                    six
2209                    seven
2210                    eight
2211                    nine
2212                    ten
2213                    eleven
2214                    twelve
2215                "
2216                .unindent(),
2217            )],
2218        );
2219        cx.run_until_parked();
2220
2221        let editor = diff.read_with(cx, |diff, cx| diff.editor.read(cx).primary_editor().clone());
2222
2223        assert_state_with_diff(
2224            &editor,
2225            cx,
2226            &"
2227                  ˇnine
2228                  ten
2229                - eleven
2230                + ELEVEN
2231                  twelve
2232            "
2233            .unindent(),
2234        );
2235
2236        // The project diff updates its excerpts when a new hunk appears in a buffer that already has a diff.
2237        let buffer = project
2238            .update(cx, |project, cx| {
2239                project.open_local_buffer(path!("/project/foo.txt"), cx)
2240            })
2241            .await
2242            .unwrap();
2243        buffer.update(cx, |buffer, cx| {
2244            buffer.edit_via_marked_text(
2245                &"
2246                    one
2247                    «TWO»
2248                    three
2249                    four
2250                    five
2251                    six
2252                    seven
2253                    eight
2254                    nine
2255                    ten
2256                    ELEVEN
2257                    twelve
2258                "
2259                .unindent(),
2260                None,
2261                cx,
2262            );
2263        });
2264        project
2265            .update(cx, |project, cx| project.save_buffer(buffer.clone(), cx))
2266            .await
2267            .unwrap();
2268        cx.run_until_parked();
2269
2270        assert_state_with_diff(
2271            &editor,
2272            cx,
2273            &"
2274                  one
2275                - two
2276                + TWO
2277                  three
2278                  four
2279                  five
2280                  ˇnine
2281                  ten
2282                - eleven
2283                + ELEVEN
2284                  twelve
2285            "
2286            .unindent(),
2287        );
2288    }
2289
2290    #[gpui::test]
2291    async fn test_branch_diff(cx: &mut TestAppContext) {
2292        init_test(cx);
2293
2294        let fs = FakeFs::new(cx.executor());
2295        fs.insert_tree(
2296            path!("/project"),
2297            json!({
2298                ".git": {},
2299                "a.txt": "C",
2300                "b.txt": "new",
2301                "c.txt": "in-merge-base-and-work-tree",
2302                "d.txt": "created-in-head",
2303            }),
2304        )
2305        .await;
2306        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
2307        let (workspace, cx) =
2308            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2309        let diff = cx
2310            .update(|window, cx| {
2311                ProjectDiff::new_with_default_branch(project.clone(), workspace, window, cx)
2312            })
2313            .await
2314            .unwrap();
2315        cx.run_until_parked();
2316
2317        fs.set_head_for_repo(
2318            Path::new(path!("/project/.git")),
2319            &[("a.txt", "B".into()), ("d.txt", "created-in-head".into())],
2320            "sha",
2321        );
2322        // fs.set_index_for_repo(dot_git, index_state);
2323        fs.set_merge_base_content_for_repo(
2324            Path::new(path!("/project/.git")),
2325            &[
2326                ("a.txt", "A".into()),
2327                ("c.txt", "in-merge-base-and-work-tree".into()),
2328            ],
2329        );
2330        cx.run_until_parked();
2331
2332        let editor = diff.read_with(cx, |diff, cx| diff.editor.read(cx).primary_editor().clone());
2333
2334        assert_state_with_diff(
2335            &editor,
2336            cx,
2337            &"
2338                - A
2339                + ˇC
2340                + new
2341                + created-in-head"
2342                .unindent(),
2343        );
2344
2345        let statuses: HashMap<Arc<RelPath>, Option<FileStatus>> =
2346            editor.update(cx, |editor, cx| {
2347                editor
2348                    .buffer()
2349                    .read(cx)
2350                    .all_buffers()
2351                    .iter()
2352                    .map(|buffer| {
2353                        (
2354                            buffer.read(cx).file().unwrap().path().clone(),
2355                            editor.status_for_buffer_id(buffer.read(cx).remote_id(), cx),
2356                        )
2357                    })
2358                    .collect()
2359            });
2360
2361        assert_eq!(
2362            statuses,
2363            HashMap::from_iter([
2364                (
2365                    rel_path("a.txt").into_arc(),
2366                    Some(FileStatus::Tracked(TrackedStatus {
2367                        index_status: git::status::StatusCode::Modified,
2368                        worktree_status: git::status::StatusCode::Modified
2369                    }))
2370                ),
2371                (rel_path("b.txt").into_arc(), Some(FileStatus::Untracked)),
2372                (
2373                    rel_path("d.txt").into_arc(),
2374                    Some(FileStatus::Tracked(TrackedStatus {
2375                        index_status: git::status::StatusCode::Added,
2376                        worktree_status: git::status::StatusCode::Added
2377                    }))
2378                )
2379            ])
2380        );
2381    }
2382
2383    #[gpui::test]
2384    async fn test_update_on_uncommit(cx: &mut TestAppContext) {
2385        init_test(cx);
2386
2387        let fs = FakeFs::new(cx.executor());
2388        fs.insert_tree(
2389            path!("/project"),
2390            json!({
2391                ".git": {},
2392                "README.md": "# My cool project\n".to_owned()
2393            }),
2394        )
2395        .await;
2396        fs.set_head_and_index_for_repo(
2397            Path::new(path!("/project/.git")),
2398            &[("README.md", "# My cool project\n".to_owned())],
2399        );
2400        let project = Project::test(fs.clone(), [Path::new(path!("/project"))], cx).await;
2401        let worktree_id = project.read_with(cx, |project, cx| {
2402            project.worktrees(cx).next().unwrap().read(cx).id()
2403        });
2404        let (workspace, cx) =
2405            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2406        cx.run_until_parked();
2407
2408        let _editor = workspace
2409            .update_in(cx, |workspace, window, cx| {
2410                workspace.open_path((worktree_id, rel_path("README.md")), None, true, window, cx)
2411            })
2412            .await
2413            .unwrap()
2414            .downcast::<Editor>()
2415            .unwrap();
2416
2417        cx.focus(&workspace);
2418        cx.update(|window, cx| {
2419            window.dispatch_action(project_diff::Diff.boxed_clone(), cx);
2420        });
2421        cx.run_until_parked();
2422        let item = workspace.update(cx, |workspace, cx| {
2423            workspace.active_item_as::<ProjectDiff>(cx).unwrap()
2424        });
2425        cx.focus(&item);
2426        let editor = item.read_with(cx, |item, cx| item.editor.read(cx).primary_editor().clone());
2427
2428        fs.set_head_and_index_for_repo(
2429            Path::new(path!("/project/.git")),
2430            &[(
2431                "README.md",
2432                "# My cool project\nDetails to come.\n".to_owned(),
2433            )],
2434        );
2435        cx.run_until_parked();
2436
2437        let mut cx = EditorTestContext::for_editor_in(editor, cx).await;
2438
2439        cx.assert_excerpts_with_selections("[EXCERPT]\nˇ# My cool project\nDetails to come.\n");
2440    }
2441}