1use crate::{Keep, KeepAll, OpenAgentDiff, Reject, RejectAll};
   2use acp_thread::{AcpThread, AcpThreadEvent};
   3use action_log::ActionLog;
   4use agent_settings::AgentSettings;
   5use anyhow::Result;
   6use buffer_diff::DiffHunkStatus;
   7use collections::{HashMap, HashSet};
   8use editor::{
   9    Direction, Editor, EditorEvent, EditorSettings, MultiBuffer, MultiBufferSnapshot,
  10    SelectionEffects, ToPoint,
  11    actions::{GoToHunk, GoToPreviousHunk},
  12    multibuffer_context_lines,
  13    scroll::Autoscroll,
  14};
  15use gpui::{
  16    Action, AnyElement, AnyView, App, AppContext, Empty, Entity, EventEmitter, FocusHandle,
  17    Focusable, Global, SharedString, Subscription, Task, WeakEntity, Window, prelude::*,
  18};
  19
  20use language::{Buffer, Capability, DiskState, OffsetRangeExt, Point};
  21use multi_buffer::PathKey;
  22use project::{Project, ProjectItem, ProjectPath};
  23use settings::{Settings, SettingsStore};
  24use std::{
  25    any::{Any, TypeId},
  26    collections::hash_map::Entry,
  27    ops::Range,
  28    rc::Rc,
  29    sync::Arc,
  30};
  31use ui::{CommonAnimationExt, IconButtonShape, KeyBinding, Tooltip, prelude::*, vertical_divider};
  32use util::ResultExt;
  33use workspace::{
  34    Item, ItemHandle, ItemNavHistory, ToolbarItemEvent, ToolbarItemLocation, ToolbarItemView,
  35    Workspace,
  36    item::{BreadcrumbText, ItemEvent, SaveOptions, TabContentParams},
  37    searchable::SearchableItemHandle,
  38};
  39use zed_actions::assistant::ToggleFocus;
  40
  41pub struct AgentDiffPane {
  42    multibuffer: Entity<MultiBuffer>,
  43    editor: Entity<Editor>,
  44    thread: AgentDiffThread,
  45    focus_handle: FocusHandle,
  46    workspace: WeakEntity<Workspace>,
  47    title: SharedString,
  48    _subscriptions: Vec<Subscription>,
  49}
  50
  51#[derive(PartialEq, Eq, Clone)]
  52pub enum AgentDiffThread {
  53    AcpThread(Entity<AcpThread>),
  54}
  55
  56impl AgentDiffThread {
  57    fn project(&self, cx: &App) -> Entity<Project> {
  58        match self {
  59            AgentDiffThread::AcpThread(thread) => thread.read(cx).project().clone(),
  60        }
  61    }
  62    fn action_log(&self, cx: &App) -> Entity<ActionLog> {
  63        match self {
  64            AgentDiffThread::AcpThread(thread) => thread.read(cx).action_log().clone(),
  65        }
  66    }
  67
  68    fn title(&self, cx: &App) -> SharedString {
  69        match self {
  70            AgentDiffThread::AcpThread(thread) => thread.read(cx).title(),
  71        }
  72    }
  73
  74    fn has_pending_edit_tool_uses(&self, cx: &App) -> bool {
  75        match self {
  76            AgentDiffThread::AcpThread(thread) => thread.read(cx).has_pending_edit_tool_calls(),
  77        }
  78    }
  79
  80    fn downgrade(&self) -> WeakAgentDiffThread {
  81        match self {
  82            AgentDiffThread::AcpThread(thread) => {
  83                WeakAgentDiffThread::AcpThread(thread.downgrade())
  84            }
  85        }
  86    }
  87}
  88
  89impl From<Entity<AcpThread>> for AgentDiffThread {
  90    fn from(entity: Entity<AcpThread>) -> Self {
  91        AgentDiffThread::AcpThread(entity)
  92    }
  93}
  94
  95#[derive(PartialEq, Eq, Clone)]
  96pub enum WeakAgentDiffThread {
  97    AcpThread(WeakEntity<AcpThread>),
  98}
  99
 100impl WeakAgentDiffThread {
 101    pub fn upgrade(&self) -> Option<AgentDiffThread> {
 102        match self {
 103            WeakAgentDiffThread::AcpThread(weak) => weak.upgrade().map(AgentDiffThread::AcpThread),
 104        }
 105    }
 106}
 107
 108impl From<WeakEntity<AcpThread>> for WeakAgentDiffThread {
 109    fn from(entity: WeakEntity<AcpThread>) -> Self {
 110        WeakAgentDiffThread::AcpThread(entity)
 111    }
 112}
 113
 114impl AgentDiffPane {
 115    pub fn deploy(
 116        thread: impl Into<AgentDiffThread>,
 117        workspace: WeakEntity<Workspace>,
 118        window: &mut Window,
 119        cx: &mut App,
 120    ) -> Result<Entity<Self>> {
 121        workspace.update(cx, |workspace, cx| {
 122            Self::deploy_in_workspace(thread, workspace, window, cx)
 123        })
 124    }
 125
 126    pub fn deploy_in_workspace(
 127        thread: impl Into<AgentDiffThread>,
 128        workspace: &mut Workspace,
 129        window: &mut Window,
 130        cx: &mut Context<Workspace>,
 131    ) -> Entity<Self> {
 132        let thread = thread.into();
 133        let existing_diff = workspace
 134            .items_of_type::<AgentDiffPane>(cx)
 135            .find(|diff| diff.read(cx).thread == thread);
 136
 137        if let Some(existing_diff) = existing_diff {
 138            workspace.activate_item(&existing_diff, true, true, window, cx);
 139            existing_diff
 140        } else {
 141            let agent_diff = cx
 142                .new(|cx| AgentDiffPane::new(thread.clone(), workspace.weak_handle(), window, cx));
 143            workspace.add_item_to_center(Box::new(agent_diff.clone()), window, cx);
 144            agent_diff
 145        }
 146    }
 147
 148    pub fn new(
 149        thread: AgentDiffThread,
 150        workspace: WeakEntity<Workspace>,
 151        window: &mut Window,
 152        cx: &mut Context<Self>,
 153    ) -> Self {
 154        let focus_handle = cx.focus_handle();
 155        let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
 156
 157        let project = thread.project(cx);
 158        let editor = cx.new(|cx| {
 159            let mut editor =
 160                Editor::for_multibuffer(multibuffer.clone(), Some(project.clone()), window, cx);
 161            editor.disable_inline_diagnostics();
 162            editor.set_expand_all_diff_hunks(cx);
 163            editor.set_render_diff_hunk_controls(diff_hunk_controls(&thread), cx);
 164            editor.register_addon(AgentDiffAddon);
 165            editor
 166        });
 167
 168        let action_log = thread.action_log(cx);
 169
 170        let mut this = Self {
 171            _subscriptions: vec![
 172                cx.observe_in(&action_log, window, |this, _action_log, window, cx| {
 173                    this.update_excerpts(window, cx)
 174                }),
 175                match &thread {
 176                    AgentDiffThread::AcpThread(thread) => cx
 177                        .subscribe(thread, |this, _thread, event, cx| {
 178                            this.handle_acp_thread_event(event, cx)
 179                        }),
 180                },
 181            ],
 182            title: SharedString::default(),
 183            multibuffer,
 184            editor,
 185            thread,
 186            focus_handle,
 187            workspace,
 188        };
 189        this.update_excerpts(window, cx);
 190        this.update_title(cx);
 191        this
 192    }
 193
 194    fn update_excerpts(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 195        let changed_buffers = self.thread.action_log(cx).read(cx).changed_buffers(cx);
 196        let mut paths_to_delete = self.multibuffer.read(cx).paths().collect::<HashSet<_>>();
 197
 198        for (buffer, diff_handle) in changed_buffers {
 199            if buffer.read(cx).file().is_none() {
 200                continue;
 201            }
 202
 203            let path_key = PathKey::for_buffer(&buffer, cx);
 204            paths_to_delete.remove(&path_key);
 205
 206            let snapshot = buffer.read(cx).snapshot();
 207            let diff = diff_handle.read(cx);
 208
 209            let diff_hunk_ranges = diff
 210                .hunks_intersecting_range(
 211                    language::Anchor::MIN..language::Anchor::MAX,
 212                    &snapshot,
 213                    cx,
 214                )
 215                .map(|diff_hunk| diff_hunk.buffer_range.to_point(&snapshot))
 216                .collect::<Vec<_>>();
 217
 218            let (was_empty, is_excerpt_newly_added) =
 219                self.multibuffer.update(cx, |multibuffer, cx| {
 220                    let was_empty = multibuffer.is_empty();
 221                    let (_, is_excerpt_newly_added) = multibuffer.set_excerpts_for_path(
 222                        path_key.clone(),
 223                        buffer.clone(),
 224                        diff_hunk_ranges,
 225                        multibuffer_context_lines(cx),
 226                        cx,
 227                    );
 228                    multibuffer.add_diff(diff_handle, cx);
 229                    (was_empty, is_excerpt_newly_added)
 230                });
 231
 232            self.editor.update(cx, |editor, cx| {
 233                if was_empty {
 234                    let first_hunk = editor
 235                        .diff_hunks_in_ranges(
 236                            &[editor::Anchor::min()..editor::Anchor::max()],
 237                            &self.multibuffer.read(cx).read(cx),
 238                        )
 239                        .next();
 240
 241                    if let Some(first_hunk) = first_hunk {
 242                        let first_hunk_start = first_hunk.multi_buffer_range().start;
 243                        editor.change_selections(Default::default(), window, cx, |selections| {
 244                            selections.select_anchor_ranges([first_hunk_start..first_hunk_start]);
 245                        })
 246                    }
 247                }
 248
 249                if is_excerpt_newly_added
 250                    && buffer
 251                        .read(cx)
 252                        .file()
 253                        .is_some_and(|file| file.disk_state() == DiskState::Deleted)
 254                {
 255                    editor.fold_buffer(snapshot.text.remote_id(), cx)
 256                }
 257            });
 258        }
 259
 260        self.multibuffer.update(cx, |multibuffer, cx| {
 261            for path in paths_to_delete {
 262                multibuffer.remove_excerpts_for_path(path, cx);
 263            }
 264        });
 265
 266        if self.multibuffer.read(cx).is_empty()
 267            && self
 268                .editor
 269                .read(cx)
 270                .focus_handle(cx)
 271                .contains_focused(window, cx)
 272        {
 273            self.focus_handle.focus(window);
 274        } else if self.focus_handle.is_focused(window) && !self.multibuffer.read(cx).is_empty() {
 275            self.editor.update(cx, |editor, cx| {
 276                editor.focus_handle(cx).focus(window);
 277            });
 278        }
 279    }
 280
 281    fn update_title(&mut self, cx: &mut Context<Self>) {
 282        let new_title = self.thread.title(cx);
 283        if new_title != self.title {
 284            self.title = new_title;
 285            cx.emit(EditorEvent::TitleChanged);
 286        }
 287    }
 288
 289    fn handle_acp_thread_event(&mut self, event: &AcpThreadEvent, cx: &mut Context<Self>) {
 290        if let AcpThreadEvent::TitleUpdated = event {
 291            self.update_title(cx)
 292        }
 293    }
 294
 295    pub fn move_to_path(&self, path_key: PathKey, window: &mut Window, cx: &mut App) {
 296        if let Some(position) = self.multibuffer.read(cx).location_for_path(&path_key, cx) {
 297            self.editor.update(cx, |editor, cx| {
 298                let first_hunk = editor
 299                    .diff_hunks_in_ranges(
 300                        &[position..editor::Anchor::max()],
 301                        &self.multibuffer.read(cx).read(cx),
 302                    )
 303                    .next();
 304
 305                if let Some(first_hunk) = first_hunk {
 306                    let first_hunk_start = first_hunk.multi_buffer_range().start;
 307                    editor.change_selections(Default::default(), window, cx, |selections| {
 308                        selections.select_anchor_ranges([first_hunk_start..first_hunk_start]);
 309                    })
 310                }
 311            });
 312        }
 313    }
 314
 315    fn keep(&mut self, _: &Keep, window: &mut Window, cx: &mut Context<Self>) {
 316        self.editor.update(cx, |editor, cx| {
 317            let snapshot = editor.buffer().read(cx).snapshot(cx);
 318            keep_edits_in_selection(editor, &snapshot, &self.thread, window, cx);
 319        });
 320    }
 321
 322    fn reject(&mut self, _: &Reject, window: &mut Window, cx: &mut Context<Self>) {
 323        self.editor.update(cx, |editor, cx| {
 324            let snapshot = editor.buffer().read(cx).snapshot(cx);
 325            reject_edits_in_selection(editor, &snapshot, &self.thread, window, cx);
 326        });
 327    }
 328
 329    fn reject_all(&mut self, _: &RejectAll, window: &mut Window, cx: &mut Context<Self>) {
 330        self.editor.update(cx, |editor, cx| {
 331            let snapshot = editor.buffer().read(cx).snapshot(cx);
 332            reject_edits_in_ranges(
 333                editor,
 334                &snapshot,
 335                &self.thread,
 336                vec![editor::Anchor::min()..editor::Anchor::max()],
 337                window,
 338                cx,
 339            );
 340        });
 341    }
 342
 343    fn keep_all(&mut self, _: &KeepAll, _window: &mut Window, cx: &mut Context<Self>) {
 344        self.thread
 345            .action_log(cx)
 346            .update(cx, |action_log, cx| action_log.keep_all_edits(cx))
 347    }
 348}
 349
 350fn keep_edits_in_selection(
 351    editor: &mut Editor,
 352    buffer_snapshot: &MultiBufferSnapshot,
 353    thread: &AgentDiffThread,
 354    window: &mut Window,
 355    cx: &mut Context<Editor>,
 356) {
 357    let ranges = editor
 358        .selections
 359        .disjoint_anchor_ranges()
 360        .collect::<Vec<_>>();
 361
 362    keep_edits_in_ranges(editor, buffer_snapshot, thread, ranges, window, cx)
 363}
 364
 365fn reject_edits_in_selection(
 366    editor: &mut Editor,
 367    buffer_snapshot: &MultiBufferSnapshot,
 368    thread: &AgentDiffThread,
 369    window: &mut Window,
 370    cx: &mut Context<Editor>,
 371) {
 372    let ranges = editor
 373        .selections
 374        .disjoint_anchor_ranges()
 375        .collect::<Vec<_>>();
 376    reject_edits_in_ranges(editor, buffer_snapshot, thread, ranges, window, cx)
 377}
 378
 379fn keep_edits_in_ranges(
 380    editor: &mut Editor,
 381    buffer_snapshot: &MultiBufferSnapshot,
 382    thread: &AgentDiffThread,
 383    ranges: Vec<Range<editor::Anchor>>,
 384    window: &mut Window,
 385    cx: &mut Context<Editor>,
 386) {
 387    let diff_hunks_in_ranges = editor
 388        .diff_hunks_in_ranges(&ranges, buffer_snapshot)
 389        .collect::<Vec<_>>();
 390
 391    update_editor_selection(editor, buffer_snapshot, &diff_hunks_in_ranges, window, cx);
 392
 393    let multibuffer = editor.buffer().clone();
 394    for hunk in &diff_hunks_in_ranges {
 395        let buffer = multibuffer.read(cx).buffer(hunk.buffer_id);
 396        if let Some(buffer) = buffer {
 397            thread.action_log(cx).update(cx, |action_log, cx| {
 398                action_log.keep_edits_in_range(buffer, hunk.buffer_range.clone(), cx)
 399            });
 400        }
 401    }
 402}
 403
 404fn reject_edits_in_ranges(
 405    editor: &mut Editor,
 406    buffer_snapshot: &MultiBufferSnapshot,
 407    thread: &AgentDiffThread,
 408    ranges: Vec<Range<editor::Anchor>>,
 409    window: &mut Window,
 410    cx: &mut Context<Editor>,
 411) {
 412    let diff_hunks_in_ranges = editor
 413        .diff_hunks_in_ranges(&ranges, buffer_snapshot)
 414        .collect::<Vec<_>>();
 415
 416    update_editor_selection(editor, buffer_snapshot, &diff_hunks_in_ranges, window, cx);
 417
 418    let multibuffer = editor.buffer().clone();
 419
 420    let mut ranges_by_buffer = HashMap::default();
 421    for hunk in &diff_hunks_in_ranges {
 422        let buffer = multibuffer.read(cx).buffer(hunk.buffer_id);
 423        if let Some(buffer) = buffer {
 424            ranges_by_buffer
 425                .entry(buffer.clone())
 426                .or_insert_with(Vec::new)
 427                .push(hunk.buffer_range.clone());
 428        }
 429    }
 430
 431    for (buffer, ranges) in ranges_by_buffer {
 432        thread
 433            .action_log(cx)
 434            .update(cx, |action_log, cx| {
 435                action_log.reject_edits_in_ranges(buffer, ranges, cx)
 436            })
 437            .detach_and_log_err(cx);
 438    }
 439}
 440
 441fn update_editor_selection(
 442    editor: &mut Editor,
 443    buffer_snapshot: &MultiBufferSnapshot,
 444    diff_hunks: &[multi_buffer::MultiBufferDiffHunk],
 445    window: &mut Window,
 446    cx: &mut Context<Editor>,
 447) {
 448    let newest_cursor = editor
 449        .selections
 450        .newest::<Point>(&editor.display_snapshot(cx))
 451        .head();
 452
 453    if !diff_hunks.iter().any(|hunk| {
 454        hunk.row_range
 455            .contains(&multi_buffer::MultiBufferRow(newest_cursor.row))
 456    }) {
 457        return;
 458    }
 459
 460    let target_hunk = {
 461        diff_hunks
 462            .last()
 463            .and_then(|last_kept_hunk| {
 464                let last_kept_hunk_end = last_kept_hunk.multi_buffer_range().end;
 465                editor
 466                    .diff_hunks_in_ranges(
 467                        &[last_kept_hunk_end..editor::Anchor::max()],
 468                        buffer_snapshot,
 469                    )
 470                    .nth(1)
 471            })
 472            .or_else(|| {
 473                let first_kept_hunk = diff_hunks.first()?;
 474                let first_kept_hunk_start = first_kept_hunk.multi_buffer_range().start;
 475                editor
 476                    .diff_hunks_in_ranges(
 477                        &[editor::Anchor::min()..first_kept_hunk_start],
 478                        buffer_snapshot,
 479                    )
 480                    .next()
 481            })
 482    };
 483
 484    if let Some(target_hunk) = target_hunk {
 485        editor.change_selections(Default::default(), window, cx, |selections| {
 486            let next_hunk_start = target_hunk.multi_buffer_range().start;
 487            selections.select_anchor_ranges([next_hunk_start..next_hunk_start]);
 488        })
 489    }
 490}
 491
 492impl EventEmitter<EditorEvent> for AgentDiffPane {}
 493
 494impl Focusable for AgentDiffPane {
 495    fn focus_handle(&self, cx: &App) -> FocusHandle {
 496        if self.multibuffer.read(cx).is_empty() {
 497            self.focus_handle.clone()
 498        } else {
 499            self.editor.focus_handle(cx)
 500        }
 501    }
 502}
 503
 504impl Item for AgentDiffPane {
 505    type Event = EditorEvent;
 506
 507    fn tab_icon(&self, _window: &Window, _cx: &App) -> Option<Icon> {
 508        Some(Icon::new(IconName::ZedAssistant).color(Color::Muted))
 509    }
 510
 511    fn to_item_events(event: &EditorEvent, f: impl FnMut(ItemEvent)) {
 512        Editor::to_item_events(event, f)
 513    }
 514
 515    fn deactivated(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 516        self.editor
 517            .update(cx, |editor, cx| editor.deactivated(window, cx));
 518    }
 519
 520    fn navigate(&mut self, data: Rc<dyn Any>, window: &mut Window, cx: &mut Context<Self>) -> bool {
 521        self.editor
 522            .update(cx, |editor, cx| editor.navigate(data, window, cx))
 523    }
 524
 525    fn tab_tooltip_text(&self, _: &App) -> Option<SharedString> {
 526        Some("Agent Diff".into())
 527    }
 528
 529    fn tab_content(&self, params: TabContentParams, _window: &Window, cx: &App) -> AnyElement {
 530        let title = self.thread.title(cx);
 531        Label::new(format!("Review: {}", title))
 532            .color(if params.selected {
 533                Color::Default
 534            } else {
 535                Color::Muted
 536            })
 537            .into_any_element()
 538    }
 539
 540    fn telemetry_event_text(&self) -> Option<&'static str> {
 541        Some("Assistant Diff Opened")
 542    }
 543
 544    fn as_searchable(&self, _: &Entity<Self>) -> Option<Box<dyn SearchableItemHandle>> {
 545        Some(Box::new(self.editor.clone()))
 546    }
 547
 548    fn for_each_project_item(
 549        &self,
 550        cx: &App,
 551        f: &mut dyn FnMut(gpui::EntityId, &dyn project::ProjectItem),
 552    ) {
 553        self.editor.for_each_project_item(cx, f)
 554    }
 555
 556    fn set_nav_history(
 557        &mut self,
 558        nav_history: ItemNavHistory,
 559        _: &mut Window,
 560        cx: &mut Context<Self>,
 561    ) {
 562        self.editor.update(cx, |editor, _| {
 563            editor.set_nav_history(Some(nav_history));
 564        });
 565    }
 566
 567    fn can_split(&self) -> bool {
 568        true
 569    }
 570
 571    fn clone_on_split(
 572        &self,
 573        _workspace_id: Option<workspace::WorkspaceId>,
 574        window: &mut Window,
 575        cx: &mut Context<Self>,
 576    ) -> Task<Option<Entity<Self>>>
 577    where
 578        Self: Sized,
 579    {
 580        Task::ready(Some(cx.new(|cx| {
 581            Self::new(self.thread.clone(), self.workspace.clone(), window, cx)
 582        })))
 583    }
 584
 585    fn is_dirty(&self, cx: &App) -> bool {
 586        self.multibuffer.read(cx).is_dirty(cx)
 587    }
 588
 589    fn has_conflict(&self, cx: &App) -> bool {
 590        self.multibuffer.read(cx).has_conflict(cx)
 591    }
 592
 593    fn can_save(&self, _: &App) -> bool {
 594        true
 595    }
 596
 597    fn save(
 598        &mut self,
 599        options: SaveOptions,
 600        project: Entity<Project>,
 601        window: &mut Window,
 602        cx: &mut Context<Self>,
 603    ) -> Task<Result<()>> {
 604        self.editor.save(options, project, window, cx)
 605    }
 606
 607    fn save_as(
 608        &mut self,
 609        _: Entity<Project>,
 610        _: ProjectPath,
 611        _window: &mut Window,
 612        _: &mut Context<Self>,
 613    ) -> Task<Result<()>> {
 614        unreachable!()
 615    }
 616
 617    fn reload(
 618        &mut self,
 619        project: Entity<Project>,
 620        window: &mut Window,
 621        cx: &mut Context<Self>,
 622    ) -> Task<Result<()>> {
 623        self.editor.reload(project, window, cx)
 624    }
 625
 626    fn act_as_type<'a>(
 627        &'a self,
 628        type_id: TypeId,
 629        self_handle: &'a Entity<Self>,
 630        _: &'a App,
 631    ) -> Option<AnyView> {
 632        if type_id == TypeId::of::<Self>() {
 633            Some(self_handle.to_any())
 634        } else if type_id == TypeId::of::<Editor>() {
 635            Some(self.editor.to_any())
 636        } else {
 637            None
 638        }
 639    }
 640
 641    fn breadcrumb_location(&self, _: &App) -> ToolbarItemLocation {
 642        ToolbarItemLocation::PrimaryLeft
 643    }
 644
 645    fn breadcrumbs(&self, theme: &theme::Theme, cx: &App) -> Option<Vec<BreadcrumbText>> {
 646        self.editor.breadcrumbs(theme, cx)
 647    }
 648
 649    fn added_to_workspace(
 650        &mut self,
 651        workspace: &mut Workspace,
 652        window: &mut Window,
 653        cx: &mut Context<Self>,
 654    ) {
 655        self.editor.update(cx, |editor, cx| {
 656            editor.added_to_workspace(workspace, window, cx)
 657        });
 658    }
 659
 660    fn tab_content_text(&self, _detail: usize, _cx: &App) -> SharedString {
 661        "Agent Diff".into()
 662    }
 663}
 664
 665impl Render for AgentDiffPane {
 666    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
 667        let is_empty = self.multibuffer.read(cx).is_empty();
 668        let focus_handle = &self.focus_handle;
 669
 670        div()
 671            .track_focus(focus_handle)
 672            .key_context(if is_empty { "EmptyPane" } else { "AgentDiff" })
 673            .on_action(cx.listener(Self::keep))
 674            .on_action(cx.listener(Self::reject))
 675            .on_action(cx.listener(Self::reject_all))
 676            .on_action(cx.listener(Self::keep_all))
 677            .bg(cx.theme().colors().editor_background)
 678            .flex()
 679            .items_center()
 680            .justify_center()
 681            .size_full()
 682            .when(is_empty, |el| {
 683                el.child(
 684                    v_flex()
 685                        .items_center()
 686                        .gap_2()
 687                        .child("No changes to review")
 688                        .child(
 689                            Button::new("continue-iterating", "Continue Iterating")
 690                                .style(ButtonStyle::Filled)
 691                                .icon(IconName::ForwardArrow)
 692                                .icon_position(IconPosition::Start)
 693                                .icon_size(IconSize::Small)
 694                                .icon_color(Color::Muted)
 695                                .full_width()
 696                                .key_binding(KeyBinding::for_action_in(
 697                                    &ToggleFocus,
 698                                    &focus_handle.clone(),
 699                                    cx,
 700                                ))
 701                                .on_click(|_event, window, cx| {
 702                                    window.dispatch_action(ToggleFocus.boxed_clone(), cx)
 703                                }),
 704                        ),
 705                )
 706            })
 707            .when(!is_empty, |el| el.child(self.editor.clone()))
 708    }
 709}
 710
 711fn diff_hunk_controls(thread: &AgentDiffThread) -> editor::RenderDiffHunkControlsFn {
 712    let thread = thread.clone();
 713
 714    Arc::new(
 715        move |row, status, hunk_range, is_created_file, line_height, editor, _, cx| {
 716            {
 717                render_diff_hunk_controls(
 718                    row,
 719                    status,
 720                    hunk_range,
 721                    is_created_file,
 722                    line_height,
 723                    &thread,
 724                    editor,
 725                    cx,
 726                )
 727            }
 728        },
 729    )
 730}
 731
 732fn render_diff_hunk_controls(
 733    row: u32,
 734    _status: &DiffHunkStatus,
 735    hunk_range: Range<editor::Anchor>,
 736    is_created_file: bool,
 737    line_height: Pixels,
 738    thread: &AgentDiffThread,
 739    editor: &Entity<Editor>,
 740    cx: &mut App,
 741) -> AnyElement {
 742    let editor = editor.clone();
 743
 744    h_flex()
 745        .h(line_height)
 746        .mr_0p5()
 747        .gap_1()
 748        .px_0p5()
 749        .pb_1()
 750        .border_x_1()
 751        .border_b_1()
 752        .border_color(cx.theme().colors().border)
 753        .rounded_b_md()
 754        .bg(cx.theme().colors().editor_background)
 755        .gap_1()
 756        .block_mouse_except_scroll()
 757        .shadow_md()
 758        .children(vec![
 759            Button::new(("reject", row as u64), "Reject")
 760                .disabled(is_created_file)
 761                .key_binding(
 762                    KeyBinding::for_action_in(&Reject, &editor.read(cx).focus_handle(cx), cx)
 763                        .map(|kb| kb.size(rems_from_px(12.))),
 764                )
 765                .on_click({
 766                    let editor = editor.clone();
 767                    let thread = thread.clone();
 768                    move |_event, window, cx| {
 769                        editor.update(cx, |editor, cx| {
 770                            let snapshot = editor.buffer().read(cx).snapshot(cx);
 771                            reject_edits_in_ranges(
 772                                editor,
 773                                &snapshot,
 774                                &thread,
 775                                vec![hunk_range.start..hunk_range.start],
 776                                window,
 777                                cx,
 778                            );
 779                        })
 780                    }
 781                }),
 782            Button::new(("keep", row as u64), "Keep")
 783                .key_binding(
 784                    KeyBinding::for_action_in(&Keep, &editor.read(cx).focus_handle(cx), cx)
 785                        .map(|kb| kb.size(rems_from_px(12.))),
 786                )
 787                .on_click({
 788                    let editor = editor.clone();
 789                    let thread = thread.clone();
 790                    move |_event, window, cx| {
 791                        editor.update(cx, |editor, cx| {
 792                            let snapshot = editor.buffer().read(cx).snapshot(cx);
 793                            keep_edits_in_ranges(
 794                                editor,
 795                                &snapshot,
 796                                &thread,
 797                                vec![hunk_range.start..hunk_range.start],
 798                                window,
 799                                cx,
 800                            );
 801                        });
 802                    }
 803                }),
 804        ])
 805        .when(
 806            !editor.read(cx).buffer().read(cx).all_diff_hunks_expanded(),
 807            |el| {
 808                el.child(
 809                    IconButton::new(("next-hunk", row as u64), IconName::ArrowDown)
 810                        .shape(IconButtonShape::Square)
 811                        .icon_size(IconSize::Small)
 812                        // .disabled(!has_multiple_hunks)
 813                        .tooltip({
 814                            let focus_handle = editor.focus_handle(cx);
 815                            move |_window, cx| {
 816                                Tooltip::for_action_in("Next Hunk", &GoToHunk, &focus_handle, cx)
 817                            }
 818                        })
 819                        .on_click({
 820                            let editor = editor.clone();
 821                            move |_event, window, cx| {
 822                                editor.update(cx, |editor, cx| {
 823                                    let snapshot = editor.snapshot(window, cx);
 824                                    let position =
 825                                        hunk_range.end.to_point(&snapshot.buffer_snapshot());
 826                                    editor.go_to_hunk_before_or_after_position(
 827                                        &snapshot,
 828                                        position,
 829                                        Direction::Next,
 830                                        window,
 831                                        cx,
 832                                    );
 833                                    editor.expand_selected_diff_hunks(cx);
 834                                });
 835                            }
 836                        }),
 837                )
 838                .child(
 839                    IconButton::new(("prev-hunk", row as u64), IconName::ArrowUp)
 840                        .shape(IconButtonShape::Square)
 841                        .icon_size(IconSize::Small)
 842                        // .disabled(!has_multiple_hunks)
 843                        .tooltip({
 844                            let focus_handle = editor.focus_handle(cx);
 845                            move |_window, cx| {
 846                                Tooltip::for_action_in(
 847                                    "Previous Hunk",
 848                                    &GoToPreviousHunk,
 849                                    &focus_handle,
 850                                    cx,
 851                                )
 852                            }
 853                        })
 854                        .on_click({
 855                            let editor = editor.clone();
 856                            move |_event, window, cx| {
 857                                editor.update(cx, |editor, cx| {
 858                                    let snapshot = editor.snapshot(window, cx);
 859                                    let point =
 860                                        hunk_range.start.to_point(&snapshot.buffer_snapshot());
 861                                    editor.go_to_hunk_before_or_after_position(
 862                                        &snapshot,
 863                                        point,
 864                                        Direction::Prev,
 865                                        window,
 866                                        cx,
 867                                    );
 868                                    editor.expand_selected_diff_hunks(cx);
 869                                });
 870                            }
 871                        }),
 872                )
 873            },
 874        )
 875        .into_any_element()
 876}
 877
 878struct AgentDiffAddon;
 879
 880impl editor::Addon for AgentDiffAddon {
 881    fn to_any(&self) -> &dyn std::any::Any {
 882        self
 883    }
 884
 885    fn extend_key_context(&self, key_context: &mut gpui::KeyContext, _: &App) {
 886        key_context.add("agent_diff");
 887    }
 888}
 889
 890pub struct AgentDiffToolbar {
 891    active_item: Option<AgentDiffToolbarItem>,
 892    _settings_subscription: Subscription,
 893}
 894
 895pub enum AgentDiffToolbarItem {
 896    Pane(WeakEntity<AgentDiffPane>),
 897    Editor {
 898        editor: WeakEntity<Editor>,
 899        state: EditorState,
 900        _diff_subscription: Subscription,
 901    },
 902}
 903
 904impl AgentDiffToolbar {
 905    pub fn new(cx: &mut Context<Self>) -> Self {
 906        Self {
 907            active_item: None,
 908            _settings_subscription: cx.observe_global::<SettingsStore>(Self::update_location),
 909        }
 910    }
 911
 912    fn dispatch_action(&self, action: &dyn Action, window: &mut Window, cx: &mut Context<Self>) {
 913        let Some(active_item) = self.active_item.as_ref() else {
 914            return;
 915        };
 916
 917        match active_item {
 918            AgentDiffToolbarItem::Pane(agent_diff) => {
 919                if let Some(agent_diff) = agent_diff.upgrade() {
 920                    agent_diff.focus_handle(cx).focus(window);
 921                }
 922            }
 923            AgentDiffToolbarItem::Editor { editor, .. } => {
 924                if let Some(editor) = editor.upgrade() {
 925                    editor.read(cx).focus_handle(cx).focus(window);
 926                }
 927            }
 928        }
 929
 930        let action = action.boxed_clone();
 931        cx.defer(move |cx| {
 932            cx.dispatch_action(action.as_ref());
 933        })
 934    }
 935
 936    fn handle_diff_notify(&mut self, agent_diff: Entity<AgentDiff>, cx: &mut Context<Self>) {
 937        let Some(AgentDiffToolbarItem::Editor { editor, state, .. }) = self.active_item.as_mut()
 938        else {
 939            return;
 940        };
 941
 942        *state = agent_diff.read(cx).editor_state(editor);
 943        self.update_location(cx);
 944        cx.notify();
 945    }
 946
 947    fn update_location(&mut self, cx: &mut Context<Self>) {
 948        let location = self.location(cx);
 949        cx.emit(ToolbarItemEvent::ChangeLocation(location));
 950    }
 951
 952    fn location(&self, cx: &App) -> ToolbarItemLocation {
 953        if !EditorSettings::get_global(cx).toolbar.agent_review {
 954            return ToolbarItemLocation::Hidden;
 955        }
 956
 957        match &self.active_item {
 958            None => ToolbarItemLocation::Hidden,
 959            Some(AgentDiffToolbarItem::Pane(_)) => ToolbarItemLocation::PrimaryRight,
 960            Some(AgentDiffToolbarItem::Editor { state, .. }) => match state {
 961                EditorState::Reviewing => ToolbarItemLocation::PrimaryRight,
 962                EditorState::Idle => ToolbarItemLocation::Hidden,
 963            },
 964        }
 965    }
 966}
 967
 968impl EventEmitter<ToolbarItemEvent> for AgentDiffToolbar {}
 969
 970impl ToolbarItemView for AgentDiffToolbar {
 971    fn set_active_pane_item(
 972        &mut self,
 973        active_pane_item: Option<&dyn ItemHandle>,
 974        _: &mut Window,
 975        cx: &mut Context<Self>,
 976    ) -> ToolbarItemLocation {
 977        if let Some(item) = active_pane_item {
 978            if let Some(pane) = item.act_as::<AgentDiffPane>(cx) {
 979                self.active_item = Some(AgentDiffToolbarItem::Pane(pane.downgrade()));
 980                return self.location(cx);
 981            }
 982
 983            if let Some(editor) = item.act_as::<Editor>(cx)
 984                && editor.read(cx).mode().is_full()
 985            {
 986                let agent_diff = AgentDiff::global(cx);
 987
 988                self.active_item = Some(AgentDiffToolbarItem::Editor {
 989                    editor: editor.downgrade(),
 990                    state: agent_diff.read(cx).editor_state(&editor.downgrade()),
 991                    _diff_subscription: cx.observe(&agent_diff, Self::handle_diff_notify),
 992                });
 993
 994                return self.location(cx);
 995            }
 996        }
 997
 998        self.active_item = None;
 999        self.location(cx)
1000    }
1001
1002    fn pane_focus_update(
1003        &mut self,
1004        _pane_focused: bool,
1005        _window: &mut Window,
1006        _cx: &mut Context<Self>,
1007    ) {
1008    }
1009}
1010
1011impl Render for AgentDiffToolbar {
1012    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
1013        let spinner_icon = div()
1014            .px_0p5()
1015            .id("generating")
1016            .tooltip(Tooltip::text("Generating Changes…"))
1017            .child(
1018                Icon::new(IconName::LoadCircle)
1019                    .size(IconSize::Small)
1020                    .color(Color::Accent)
1021                    .with_rotate_animation(3),
1022            )
1023            .into_any();
1024
1025        let Some(active_item) = self.active_item.as_ref() else {
1026            return Empty.into_any();
1027        };
1028
1029        match active_item {
1030            AgentDiffToolbarItem::Editor { editor, state, .. } => {
1031                let Some(editor) = editor.upgrade() else {
1032                    return Empty.into_any();
1033                };
1034
1035                let editor_focus_handle = editor.read(cx).focus_handle(cx);
1036
1037                let content = match state {
1038                    EditorState::Idle => return Empty.into_any(),
1039                    EditorState::Reviewing => vec![
1040                        h_flex()
1041                            .child(
1042                                IconButton::new("hunk-up", IconName::ArrowUp)
1043                                    .icon_size(IconSize::Small)
1044                                    .tooltip(Tooltip::for_action_title_in(
1045                                        "Previous Hunk",
1046                                        &GoToPreviousHunk,
1047                                        &editor_focus_handle,
1048                                    ))
1049                                    .on_click({
1050                                        let editor_focus_handle = editor_focus_handle.clone();
1051                                        move |_, window, cx| {
1052                                            editor_focus_handle.dispatch_action(
1053                                                &GoToPreviousHunk,
1054                                                window,
1055                                                cx,
1056                                            );
1057                                        }
1058                                    }),
1059                            )
1060                            .child(
1061                                IconButton::new("hunk-down", IconName::ArrowDown)
1062                                    .icon_size(IconSize::Small)
1063                                    .tooltip(Tooltip::for_action_title_in(
1064                                        "Next Hunk",
1065                                        &GoToHunk,
1066                                        &editor_focus_handle,
1067                                    ))
1068                                    .on_click({
1069                                        let editor_focus_handle = editor_focus_handle.clone();
1070                                        move |_, window, cx| {
1071                                            editor_focus_handle
1072                                                .dispatch_action(&GoToHunk, window, cx);
1073                                        }
1074                                    }),
1075                            )
1076                            .into_any_element(),
1077                        vertical_divider().into_any_element(),
1078                        h_flex()
1079                            .gap_0p5()
1080                            .child(
1081                                Button::new("reject-all", "Reject All")
1082                                    .key_binding({
1083                                        KeyBinding::for_action_in(
1084                                            &RejectAll,
1085                                            &editor_focus_handle,
1086                                            cx,
1087                                        )
1088                                        .map(|kb| kb.size(rems_from_px(12.)))
1089                                    })
1090                                    .on_click(cx.listener(|this, _, window, cx| {
1091                                        this.dispatch_action(&RejectAll, window, cx)
1092                                    })),
1093                            )
1094                            .child(
1095                                Button::new("keep-all", "Keep All")
1096                                    .key_binding({
1097                                        KeyBinding::for_action_in(
1098                                            &KeepAll,
1099                                            &editor_focus_handle,
1100                                            cx,
1101                                        )
1102                                        .map(|kb| kb.size(rems_from_px(12.)))
1103                                    })
1104                                    .on_click(cx.listener(|this, _, window, cx| {
1105                                        this.dispatch_action(&KeepAll, window, cx)
1106                                    })),
1107                            )
1108                            .into_any_element(),
1109                    ],
1110                };
1111
1112                h_flex()
1113                    .track_focus(&editor_focus_handle)
1114                    .size_full()
1115                    .px_1()
1116                    .mr_1()
1117                    .gap_1()
1118                    .children(content)
1119                    .child(vertical_divider())
1120                    .when_some(editor.read(cx).workspace(), |this, _workspace| {
1121                        this.child(
1122                            IconButton::new("review", IconName::ListTodo)
1123                                .icon_size(IconSize::Small)
1124                                .tooltip(Tooltip::for_action_title_in(
1125                                    "Review All Files",
1126                                    &OpenAgentDiff,
1127                                    &editor_focus_handle,
1128                                ))
1129                                .on_click({
1130                                    cx.listener(move |this, _, window, cx| {
1131                                        this.dispatch_action(&OpenAgentDiff, window, cx);
1132                                    })
1133                                }),
1134                        )
1135                    })
1136                    .child(vertical_divider())
1137                    .on_action({
1138                        let editor = editor.clone();
1139                        move |_action: &OpenAgentDiff, window, cx| {
1140                            AgentDiff::global(cx).update(cx, |agent_diff, cx| {
1141                                agent_diff.deploy_pane_from_editor(&editor, window, cx);
1142                            });
1143                        }
1144                    })
1145                    .into_any()
1146            }
1147            AgentDiffToolbarItem::Pane(agent_diff) => {
1148                let Some(agent_diff) = agent_diff.upgrade() else {
1149                    return Empty.into_any();
1150                };
1151
1152                let has_pending_edit_tool_use =
1153                    agent_diff.read(cx).thread.has_pending_edit_tool_uses(cx);
1154
1155                if has_pending_edit_tool_use {
1156                    return div().px_2().child(spinner_icon).into_any();
1157                }
1158
1159                let is_empty = agent_diff.read(cx).multibuffer.read(cx).is_empty();
1160                if is_empty {
1161                    return Empty.into_any();
1162                }
1163
1164                let focus_handle = agent_diff.focus_handle(cx);
1165
1166                h_group_xl()
1167                    .my_neg_1()
1168                    .py_1()
1169                    .items_center()
1170                    .flex_wrap()
1171                    .child(
1172                        h_group_sm()
1173                            .child(
1174                                Button::new("reject-all", "Reject All")
1175                                    .key_binding({
1176                                        KeyBinding::for_action_in(&RejectAll, &focus_handle, cx)
1177                                            .map(|kb| kb.size(rems_from_px(12.)))
1178                                    })
1179                                    .on_click(cx.listener(|this, _, window, cx| {
1180                                        this.dispatch_action(&RejectAll, window, cx)
1181                                    })),
1182                            )
1183                            .child(
1184                                Button::new("keep-all", "Keep All")
1185                                    .key_binding({
1186                                        KeyBinding::for_action_in(&KeepAll, &focus_handle, cx)
1187                                            .map(|kb| kb.size(rems_from_px(12.)))
1188                                    })
1189                                    .on_click(cx.listener(|this, _, window, cx| {
1190                                        this.dispatch_action(&KeepAll, window, cx)
1191                                    })),
1192                            ),
1193                    )
1194                    .into_any()
1195            }
1196        }
1197    }
1198}
1199
1200#[derive(Default)]
1201pub struct AgentDiff {
1202    reviewing_editors: HashMap<WeakEntity<Editor>, EditorState>,
1203    workspace_threads: HashMap<WeakEntity<Workspace>, WorkspaceThread>,
1204}
1205
1206#[derive(Clone, Debug, PartialEq, Eq)]
1207pub enum EditorState {
1208    Idle,
1209    Reviewing,
1210}
1211
1212struct WorkspaceThread {
1213    thread: WeakAgentDiffThread,
1214    _thread_subscriptions: (Subscription, Subscription),
1215    singleton_editors: HashMap<WeakEntity<Buffer>, HashMap<WeakEntity<Editor>, Subscription>>,
1216    _settings_subscription: Subscription,
1217    _workspace_subscription: Option<Subscription>,
1218}
1219
1220struct AgentDiffGlobal(Entity<AgentDiff>);
1221
1222impl Global for AgentDiffGlobal {}
1223
1224impl AgentDiff {
1225    fn global(cx: &mut App) -> Entity<Self> {
1226        cx.try_global::<AgentDiffGlobal>()
1227            .map(|global| global.0.clone())
1228            .unwrap_or_else(|| {
1229                let entity = cx.new(|_cx| Self::default());
1230                let global = AgentDiffGlobal(entity.clone());
1231                cx.set_global(global);
1232                entity
1233            })
1234    }
1235
1236    pub fn set_active_thread(
1237        workspace: &WeakEntity<Workspace>,
1238        thread: impl Into<AgentDiffThread>,
1239        window: &mut Window,
1240        cx: &mut App,
1241    ) {
1242        Self::global(cx).update(cx, |this, cx| {
1243            this.register_active_thread_impl(workspace, thread.into(), window, cx);
1244        });
1245    }
1246
1247    fn register_active_thread_impl(
1248        &mut self,
1249        workspace: &WeakEntity<Workspace>,
1250        thread: AgentDiffThread,
1251        window: &mut Window,
1252        cx: &mut Context<Self>,
1253    ) {
1254        let action_log = thread.action_log(cx);
1255
1256        let action_log_subscription = cx.observe_in(&action_log, window, {
1257            let workspace = workspace.clone();
1258            move |this, _action_log, window, cx| {
1259                this.update_reviewing_editors(&workspace, window, cx);
1260            }
1261        });
1262
1263        let thread_subscription = match &thread {
1264            AgentDiffThread::AcpThread(thread) => cx.subscribe_in(thread, window, {
1265                let workspace = workspace.clone();
1266                move |this, thread, event, window, cx| {
1267                    this.handle_acp_thread_event(&workspace, thread, event, window, cx)
1268                }
1269            }),
1270        };
1271
1272        if let Some(workspace_thread) = self.workspace_threads.get_mut(workspace) {
1273            // replace thread and action log subscription, but keep editors
1274            workspace_thread.thread = thread.downgrade();
1275            workspace_thread._thread_subscriptions = (action_log_subscription, thread_subscription);
1276            self.update_reviewing_editors(workspace, window, cx);
1277            return;
1278        }
1279
1280        let settings_subscription = cx.observe_global_in::<SettingsStore>(window, {
1281            let workspace = workspace.clone();
1282            let mut was_active = AgentSettings::get_global(cx).single_file_review;
1283            move |this, window, cx| {
1284                let is_active = AgentSettings::get_global(cx).single_file_review;
1285                if was_active != is_active {
1286                    was_active = is_active;
1287                    this.update_reviewing_editors(&workspace, window, cx);
1288                }
1289            }
1290        });
1291
1292        let workspace_subscription = workspace
1293            .upgrade()
1294            .map(|workspace| cx.subscribe_in(&workspace, window, Self::handle_workspace_event));
1295
1296        self.workspace_threads.insert(
1297            workspace.clone(),
1298            WorkspaceThread {
1299                thread: thread.downgrade(),
1300                _thread_subscriptions: (action_log_subscription, thread_subscription),
1301                singleton_editors: HashMap::default(),
1302                _settings_subscription: settings_subscription,
1303                _workspace_subscription: workspace_subscription,
1304            },
1305        );
1306
1307        let workspace = workspace.clone();
1308        cx.defer_in(window, move |this, window, cx| {
1309            if let Some(workspace) = workspace.upgrade() {
1310                this.register_workspace(workspace, window, cx);
1311            }
1312        });
1313    }
1314
1315    fn register_workspace(
1316        &mut self,
1317        workspace: Entity<Workspace>,
1318        window: &mut Window,
1319        cx: &mut Context<Self>,
1320    ) {
1321        let agent_diff = cx.entity();
1322
1323        let editors = workspace.update(cx, |workspace, cx| {
1324            let agent_diff = agent_diff.clone();
1325
1326            Self::register_review_action::<Keep>(workspace, Self::keep, &agent_diff);
1327            Self::register_review_action::<Reject>(workspace, Self::reject, &agent_diff);
1328            Self::register_review_action::<KeepAll>(workspace, Self::keep_all, &agent_diff);
1329            Self::register_review_action::<RejectAll>(workspace, Self::reject_all, &agent_diff);
1330
1331            workspace.items_of_type(cx).collect::<Vec<_>>()
1332        });
1333
1334        let weak_workspace = workspace.downgrade();
1335
1336        for editor in editors {
1337            if let Some(buffer) = Self::full_editor_buffer(editor.read(cx), cx) {
1338                self.register_editor(weak_workspace.clone(), buffer, editor, window, cx);
1339            };
1340        }
1341
1342        self.update_reviewing_editors(&weak_workspace, window, cx);
1343    }
1344
1345    fn register_review_action<T: Action>(
1346        workspace: &mut Workspace,
1347        review: impl Fn(&Entity<Editor>, &AgentDiffThread, &mut Window, &mut App) -> PostReviewState
1348        + 'static,
1349        this: &Entity<AgentDiff>,
1350    ) {
1351        let this = this.clone();
1352        workspace.register_action(move |workspace, _: &T, window, cx| {
1353            let review = &review;
1354            let task = this.update(cx, |this, cx| {
1355                this.review_in_active_editor(workspace, review, window, cx)
1356            });
1357
1358            if let Some(task) = task {
1359                task.detach_and_log_err(cx);
1360            } else {
1361                cx.propagate();
1362            }
1363        });
1364    }
1365
1366    fn handle_acp_thread_event(
1367        &mut self,
1368        workspace: &WeakEntity<Workspace>,
1369        thread: &Entity<AcpThread>,
1370        event: &AcpThreadEvent,
1371        window: &mut Window,
1372        cx: &mut Context<Self>,
1373    ) {
1374        match event {
1375            AcpThreadEvent::NewEntry => {
1376                if thread
1377                    .read(cx)
1378                    .entries()
1379                    .last()
1380                    .is_some_and(|entry| entry.diffs().next().is_some())
1381                {
1382                    self.update_reviewing_editors(workspace, window, cx);
1383                }
1384            }
1385            AcpThreadEvent::EntryUpdated(ix) => {
1386                if thread
1387                    .read(cx)
1388                    .entries()
1389                    .get(*ix)
1390                    .is_some_and(|entry| entry.diffs().next().is_some())
1391                {
1392                    self.update_reviewing_editors(workspace, window, cx);
1393                }
1394            }
1395            AcpThreadEvent::Stopped
1396            | AcpThreadEvent::Error
1397            | AcpThreadEvent::LoadError(_)
1398            | AcpThreadEvent::Refusal => {
1399                self.update_reviewing_editors(workspace, window, cx);
1400            }
1401            AcpThreadEvent::TitleUpdated
1402            | AcpThreadEvent::TokenUsageUpdated
1403            | AcpThreadEvent::EntriesRemoved(_)
1404            | AcpThreadEvent::ToolAuthorizationRequired
1405            | AcpThreadEvent::PromptCapabilitiesUpdated
1406            | AcpThreadEvent::AvailableCommandsUpdated(_)
1407            | AcpThreadEvent::Retry(_)
1408            | AcpThreadEvent::ModeUpdated(_) => {}
1409        }
1410    }
1411
1412    fn handle_workspace_event(
1413        &mut self,
1414        workspace: &Entity<Workspace>,
1415        event: &workspace::Event,
1416        window: &mut Window,
1417        cx: &mut Context<Self>,
1418    ) {
1419        if let workspace::Event::ItemAdded { item } = event
1420            && let Some(editor) = item.downcast::<Editor>()
1421            && let Some(buffer) = Self::full_editor_buffer(editor.read(cx), cx)
1422        {
1423            self.register_editor(workspace.downgrade(), buffer, editor, window, cx);
1424        }
1425    }
1426
1427    fn full_editor_buffer(editor: &Editor, cx: &App) -> Option<WeakEntity<Buffer>> {
1428        if editor.mode().is_full() {
1429            editor
1430                .buffer()
1431                .read(cx)
1432                .as_singleton()
1433                .map(|buffer| buffer.downgrade())
1434        } else {
1435            None
1436        }
1437    }
1438
1439    fn register_editor(
1440        &mut self,
1441        workspace: WeakEntity<Workspace>,
1442        buffer: WeakEntity<Buffer>,
1443        editor: Entity<Editor>,
1444        window: &mut Window,
1445        cx: &mut Context<Self>,
1446    ) {
1447        let Some(workspace_thread) = self.workspace_threads.get_mut(&workspace) else {
1448            return;
1449        };
1450
1451        let weak_editor = editor.downgrade();
1452
1453        workspace_thread
1454            .singleton_editors
1455            .entry(buffer.clone())
1456            .or_default()
1457            .entry(weak_editor.clone())
1458            .or_insert_with(|| {
1459                let workspace = workspace.clone();
1460                cx.observe_release(&editor, move |this, _, _cx| {
1461                    let Some(active_thread) = this.workspace_threads.get_mut(&workspace) else {
1462                        return;
1463                    };
1464
1465                    if let Entry::Occupied(mut entry) =
1466                        active_thread.singleton_editors.entry(buffer)
1467                    {
1468                        let set = entry.get_mut();
1469                        set.remove(&weak_editor);
1470
1471                        if set.is_empty() {
1472                            entry.remove();
1473                        }
1474                    }
1475                })
1476            });
1477
1478        self.update_reviewing_editors(&workspace, window, cx);
1479    }
1480
1481    fn update_reviewing_editors(
1482        &mut self,
1483        workspace: &WeakEntity<Workspace>,
1484        window: &mut Window,
1485        cx: &mut Context<Self>,
1486    ) {
1487        if !AgentSettings::get_global(cx).single_file_review {
1488            for (editor, _) in self.reviewing_editors.drain() {
1489                editor
1490                    .update(cx, |editor, cx| {
1491                        editor.end_temporary_diff_override(cx);
1492                        editor.unregister_addon::<EditorAgentDiffAddon>();
1493                    })
1494                    .ok();
1495            }
1496            return;
1497        }
1498
1499        let Some(workspace_thread) = self.workspace_threads.get_mut(workspace) else {
1500            return;
1501        };
1502
1503        let Some(thread) = workspace_thread.thread.upgrade() else {
1504            return;
1505        };
1506
1507        let action_log = thread.action_log(cx);
1508        let changed_buffers = action_log.read(cx).changed_buffers(cx);
1509
1510        let mut unaffected = self.reviewing_editors.clone();
1511
1512        for (buffer, diff_handle) in changed_buffers {
1513            if buffer.read(cx).file().is_none() {
1514                continue;
1515            }
1516
1517            let Some(buffer_editors) = workspace_thread.singleton_editors.get(&buffer.downgrade())
1518            else {
1519                continue;
1520            };
1521
1522            for weak_editor in buffer_editors.keys() {
1523                let Some(editor) = weak_editor.upgrade() else {
1524                    continue;
1525                };
1526
1527                let multibuffer = editor.read(cx).buffer().clone();
1528                multibuffer.update(cx, |multibuffer, cx| {
1529                    multibuffer.add_diff(diff_handle.clone(), cx);
1530                });
1531
1532                let reviewing_state = EditorState::Reviewing;
1533
1534                let previous_state = self
1535                    .reviewing_editors
1536                    .insert(weak_editor.clone(), reviewing_state.clone());
1537
1538                if previous_state.is_none() {
1539                    editor.update(cx, |editor, cx| {
1540                        editor.start_temporary_diff_override();
1541                        editor.set_render_diff_hunk_controls(diff_hunk_controls(&thread), cx);
1542                        editor.set_expand_all_diff_hunks(cx);
1543                        editor.register_addon(EditorAgentDiffAddon);
1544                    });
1545                } else {
1546                    unaffected.remove(weak_editor);
1547                }
1548
1549                if reviewing_state == EditorState::Reviewing
1550                    && previous_state != Some(reviewing_state)
1551                {
1552                    // Jump to first hunk when we enter review mode
1553                    editor.update(cx, |editor, cx| {
1554                        let snapshot = multibuffer.read(cx).snapshot(cx);
1555                        if let Some(first_hunk) = snapshot.diff_hunks().next() {
1556                            let first_hunk_start = first_hunk.multi_buffer_range().start;
1557
1558                            editor.change_selections(
1559                                SelectionEffects::scroll(Autoscroll::center()),
1560                                window,
1561                                cx,
1562                                |selections| {
1563                                    selections.select_ranges([first_hunk_start..first_hunk_start])
1564                                },
1565                            );
1566                        }
1567                    });
1568                }
1569            }
1570        }
1571
1572        // Remove editors from this workspace that are no longer under review
1573        for (editor, _) in unaffected {
1574            // Note: We could avoid this check by storing `reviewing_editors` by Workspace,
1575            // but that would add another lookup in `AgentDiff::editor_state`
1576            // which gets called much more frequently.
1577            let in_workspace = editor
1578                .read_with(cx, |editor, _cx| editor.workspace())
1579                .ok()
1580                .flatten()
1581                .is_some_and(|editor_workspace| {
1582                    editor_workspace.entity_id() == workspace.entity_id()
1583                });
1584
1585            if in_workspace {
1586                editor
1587                    .update(cx, |editor, cx| {
1588                        editor.end_temporary_diff_override(cx);
1589                        editor.unregister_addon::<EditorAgentDiffAddon>();
1590                    })
1591                    .ok();
1592                self.reviewing_editors.remove(&editor);
1593            }
1594        }
1595
1596        cx.notify();
1597    }
1598
1599    fn editor_state(&self, editor: &WeakEntity<Editor>) -> EditorState {
1600        self.reviewing_editors
1601            .get(editor)
1602            .cloned()
1603            .unwrap_or(EditorState::Idle)
1604    }
1605
1606    fn deploy_pane_from_editor(&self, editor: &Entity<Editor>, window: &mut Window, cx: &mut App) {
1607        let Some(workspace) = editor.read(cx).workspace() else {
1608            return;
1609        };
1610
1611        let Some(WorkspaceThread { thread, .. }) =
1612            self.workspace_threads.get(&workspace.downgrade())
1613        else {
1614            return;
1615        };
1616
1617        let Some(thread) = thread.upgrade() else {
1618            return;
1619        };
1620
1621        AgentDiffPane::deploy(thread, workspace.downgrade(), window, cx).log_err();
1622    }
1623
1624    fn keep_all(
1625        editor: &Entity<Editor>,
1626        thread: &AgentDiffThread,
1627        window: &mut Window,
1628        cx: &mut App,
1629    ) -> PostReviewState {
1630        editor.update(cx, |editor, cx| {
1631            let snapshot = editor.buffer().read(cx).snapshot(cx);
1632            keep_edits_in_ranges(
1633                editor,
1634                &snapshot,
1635                thread,
1636                vec![editor::Anchor::min()..editor::Anchor::max()],
1637                window,
1638                cx,
1639            );
1640        });
1641        PostReviewState::AllReviewed
1642    }
1643
1644    fn reject_all(
1645        editor: &Entity<Editor>,
1646        thread: &AgentDiffThread,
1647        window: &mut Window,
1648        cx: &mut App,
1649    ) -> PostReviewState {
1650        editor.update(cx, |editor, cx| {
1651            let snapshot = editor.buffer().read(cx).snapshot(cx);
1652            reject_edits_in_ranges(
1653                editor,
1654                &snapshot,
1655                thread,
1656                vec![editor::Anchor::min()..editor::Anchor::max()],
1657                window,
1658                cx,
1659            );
1660        });
1661        PostReviewState::AllReviewed
1662    }
1663
1664    fn keep(
1665        editor: &Entity<Editor>,
1666        thread: &AgentDiffThread,
1667        window: &mut Window,
1668        cx: &mut App,
1669    ) -> PostReviewState {
1670        editor.update(cx, |editor, cx| {
1671            let snapshot = editor.buffer().read(cx).snapshot(cx);
1672            keep_edits_in_selection(editor, &snapshot, thread, window, cx);
1673            Self::post_review_state(&snapshot)
1674        })
1675    }
1676
1677    fn reject(
1678        editor: &Entity<Editor>,
1679        thread: &AgentDiffThread,
1680        window: &mut Window,
1681        cx: &mut App,
1682    ) -> PostReviewState {
1683        editor.update(cx, |editor, cx| {
1684            let snapshot = editor.buffer().read(cx).snapshot(cx);
1685            reject_edits_in_selection(editor, &snapshot, thread, window, cx);
1686            Self::post_review_state(&snapshot)
1687        })
1688    }
1689
1690    fn post_review_state(snapshot: &MultiBufferSnapshot) -> PostReviewState {
1691        for (i, _) in snapshot.diff_hunks().enumerate() {
1692            if i > 0 {
1693                return PostReviewState::Pending;
1694            }
1695        }
1696        PostReviewState::AllReviewed
1697    }
1698
1699    fn review_in_active_editor(
1700        &mut self,
1701        workspace: &mut Workspace,
1702        review: impl Fn(&Entity<Editor>, &AgentDiffThread, &mut Window, &mut App) -> PostReviewState,
1703        window: &mut Window,
1704        cx: &mut Context<Self>,
1705    ) -> Option<Task<Result<()>>> {
1706        let active_item = workspace.active_item(cx)?;
1707        let editor = active_item.act_as::<Editor>(cx)?;
1708
1709        if !matches!(
1710            self.editor_state(&editor.downgrade()),
1711            EditorState::Reviewing
1712        ) {
1713            return None;
1714        }
1715
1716        let WorkspaceThread { thread, .. } =
1717            self.workspace_threads.get(&workspace.weak_handle())?;
1718
1719        let thread = thread.upgrade()?;
1720
1721        if let PostReviewState::AllReviewed = review(&editor, &thread, window, cx)
1722            && let Some(curr_buffer) = editor.read(cx).buffer().read(cx).as_singleton()
1723        {
1724            let changed_buffers = thread.action_log(cx).read(cx).changed_buffers(cx);
1725
1726            let mut keys = changed_buffers.keys().cycle();
1727            keys.find(|k| *k == &curr_buffer);
1728            let next_project_path = keys
1729                .next()
1730                .filter(|k| *k != &curr_buffer)
1731                .and_then(|after| after.read(cx).project_path(cx));
1732
1733            if let Some(path) = next_project_path {
1734                let task = workspace.open_path(path, None, true, window, cx);
1735                let task = cx.spawn(async move |_, _cx| task.await.map(|_| ()));
1736                return Some(task);
1737            }
1738        }
1739
1740        Some(Task::ready(Ok(())))
1741    }
1742}
1743
1744enum PostReviewState {
1745    AllReviewed,
1746    Pending,
1747}
1748
1749pub struct EditorAgentDiffAddon;
1750
1751impl editor::Addon for EditorAgentDiffAddon {
1752    fn to_any(&self) -> &dyn std::any::Any {
1753        self
1754    }
1755
1756    fn extend_key_context(&self, key_context: &mut gpui::KeyContext, _: &App) {
1757        key_context.add("agent_diff");
1758        key_context.add("editor_agent_diff");
1759    }
1760}
1761
1762#[cfg(test)]
1763mod tests {
1764    use super::*;
1765    use crate::Keep;
1766    use acp_thread::AgentConnection as _;
1767    use agent_settings::AgentSettings;
1768    use editor::EditorSettings;
1769    use gpui::{TestAppContext, UpdateGlobal, VisualTestContext};
1770    use project::{FakeFs, Project};
1771    use serde_json::json;
1772    use settings::{Settings, SettingsStore};
1773    use std::{path::Path, rc::Rc};
1774    use util::path;
1775
1776    #[gpui::test]
1777    async fn test_multibuffer_agent_diff(cx: &mut TestAppContext) {
1778        cx.update(|cx| {
1779            let settings_store = SettingsStore::test(cx);
1780            cx.set_global(settings_store);
1781            language::init(cx);
1782            Project::init_settings(cx);
1783            AgentSettings::register(cx);
1784            prompt_store::init(cx);
1785            workspace::init_settings(cx);
1786            theme::init(theme::LoadThemes::JustBase, cx);
1787            EditorSettings::register(cx);
1788            language_model::init_settings(cx);
1789        });
1790
1791        let fs = FakeFs::new(cx.executor());
1792        fs.insert_tree(
1793            path!("/test"),
1794            json!({"file1": "abc\ndef\nghi\njkl\nmno\npqr\nstu\nvwx\nyz"}),
1795        )
1796        .await;
1797        let project = Project::test(fs, [path!("/test").as_ref()], cx).await;
1798        let buffer_path = project
1799            .read_with(cx, |project, cx| {
1800                project.find_project_path("test/file1", cx)
1801            })
1802            .unwrap();
1803
1804        let connection = Rc::new(acp_thread::StubAgentConnection::new());
1805        let thread = cx
1806            .update(|cx| {
1807                connection
1808                    .clone()
1809                    .new_thread(project.clone(), Path::new(path!("/test")), cx)
1810            })
1811            .await
1812            .unwrap();
1813
1814        let thread = AgentDiffThread::AcpThread(thread);
1815        let action_log = cx.read(|cx| thread.action_log(cx));
1816
1817        let (workspace, cx) =
1818            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1819        let agent_diff = cx.new_window_entity(|window, cx| {
1820            AgentDiffPane::new(thread.clone(), workspace.downgrade(), window, cx)
1821        });
1822        let editor = agent_diff.read_with(cx, |diff, _cx| diff.editor.clone());
1823
1824        let buffer = project
1825            .update(cx, |project, cx| project.open_buffer(buffer_path, cx))
1826            .await
1827            .unwrap();
1828        cx.update(|_, cx| {
1829            action_log.update(cx, |log, cx| log.buffer_read(buffer.clone(), cx));
1830            buffer.update(cx, |buffer, cx| {
1831                buffer
1832                    .edit(
1833                        [
1834                            (Point::new(1, 1)..Point::new(1, 2), "E"),
1835                            (Point::new(3, 2)..Point::new(3, 3), "L"),
1836                            (Point::new(5, 0)..Point::new(5, 1), "P"),
1837                            (Point::new(7, 1)..Point::new(7, 2), "W"),
1838                        ],
1839                        None,
1840                        cx,
1841                    )
1842                    .unwrap()
1843            });
1844            action_log.update(cx, |log, cx| log.buffer_edited(buffer.clone(), cx));
1845        });
1846        cx.run_until_parked();
1847
1848        // When opening the assistant diff, the cursor is positioned on the first hunk.
1849        assert_eq!(
1850            editor.read_with(cx, |editor, cx| editor.text(cx)),
1851            "abc\ndef\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
1852        );
1853        assert_eq!(
1854            editor
1855                .update(cx, |editor, cx| editor
1856                    .selections
1857                    .newest::<Point>(&editor.display_snapshot(cx)))
1858                .range(),
1859            Point::new(1, 0)..Point::new(1, 0)
1860        );
1861
1862        // After keeping a hunk, the cursor should be positioned on the second hunk.
1863        agent_diff.update_in(cx, |diff, window, cx| diff.keep(&Keep, window, cx));
1864        cx.run_until_parked();
1865        assert_eq!(
1866            editor.read_with(cx, |editor, cx| editor.text(cx)),
1867            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
1868        );
1869        assert_eq!(
1870            editor
1871                .update(cx, |editor, cx| editor
1872                    .selections
1873                    .newest::<Point>(&editor.display_snapshot(cx)))
1874                .range(),
1875            Point::new(3, 0)..Point::new(3, 0)
1876        );
1877
1878        // Rejecting a hunk also moves the cursor to the next hunk, possibly cycling if it's at the end.
1879        editor.update_in(cx, |editor, window, cx| {
1880            editor.change_selections(SelectionEffects::no_scroll(), window, cx, |selections| {
1881                selections.select_ranges([Point::new(10, 0)..Point::new(10, 0)])
1882            });
1883        });
1884        agent_diff.update_in(cx, |diff, window, cx| {
1885            diff.reject(&crate::Reject, window, cx)
1886        });
1887        cx.run_until_parked();
1888        assert_eq!(
1889            editor.read_with(cx, |editor, cx| editor.text(cx)),
1890            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nyz"
1891        );
1892        assert_eq!(
1893            editor
1894                .update(cx, |editor, cx| editor
1895                    .selections
1896                    .newest::<Point>(&editor.display_snapshot(cx)))
1897                .range(),
1898            Point::new(3, 0)..Point::new(3, 0)
1899        );
1900
1901        // Keeping a range that doesn't intersect the current selection doesn't move it.
1902        agent_diff.update_in(cx, |_diff, window, cx| {
1903            let position = editor
1904                .read(cx)
1905                .buffer()
1906                .read(cx)
1907                .read(cx)
1908                .anchor_before(Point::new(7, 0));
1909            editor.update(cx, |editor, cx| {
1910                let snapshot = editor.buffer().read(cx).snapshot(cx);
1911                keep_edits_in_ranges(
1912                    editor,
1913                    &snapshot,
1914                    &thread,
1915                    vec![position..position],
1916                    window,
1917                    cx,
1918                )
1919            });
1920        });
1921        cx.run_until_parked();
1922        assert_eq!(
1923            editor.read_with(cx, |editor, cx| editor.text(cx)),
1924            "abc\ndEf\nghi\njkl\njkL\nmno\nPqr\nstu\nvwx\nyz"
1925        );
1926        assert_eq!(
1927            editor
1928                .update(cx, |editor, cx| editor
1929                    .selections
1930                    .newest::<Point>(&editor.display_snapshot(cx)))
1931                .range(),
1932            Point::new(3, 0)..Point::new(3, 0)
1933        );
1934    }
1935
1936    #[gpui::test]
1937    async fn test_singleton_agent_diff(cx: &mut TestAppContext) {
1938        cx.update(|cx| {
1939            let settings_store = SettingsStore::test(cx);
1940            cx.set_global(settings_store);
1941            language::init(cx);
1942            Project::init_settings(cx);
1943            AgentSettings::register(cx);
1944            prompt_store::init(cx);
1945            workspace::init_settings(cx);
1946            theme::init(theme::LoadThemes::JustBase, cx);
1947            EditorSettings::register(cx);
1948            language_model::init_settings(cx);
1949            workspace::register_project_item::<Editor>(cx);
1950        });
1951
1952        let fs = FakeFs::new(cx.executor());
1953        fs.insert_tree(
1954            path!("/test"),
1955            json!({"file1": "abc\ndef\nghi\njkl\nmno\npqr\nstu\nvwx\nyz"}),
1956        )
1957        .await;
1958        fs.insert_tree(path!("/test"), json!({"file2": "abc\ndef\nghi"}))
1959            .await;
1960
1961        let project = Project::test(fs, [path!("/test").as_ref()], cx).await;
1962        let buffer_path1 = project
1963            .read_with(cx, |project, cx| {
1964                project.find_project_path("test/file1", cx)
1965            })
1966            .unwrap();
1967        let buffer_path2 = project
1968            .read_with(cx, |project, cx| {
1969                project.find_project_path("test/file2", cx)
1970            })
1971            .unwrap();
1972
1973        let (workspace, cx) =
1974            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1975
1976        // Add the diff toolbar to the active pane
1977        let diff_toolbar = cx.new_window_entity(|_, cx| AgentDiffToolbar::new(cx));
1978
1979        workspace.update_in(cx, {
1980            let diff_toolbar = diff_toolbar.clone();
1981
1982            move |workspace, window, cx| {
1983                workspace.active_pane().update(cx, |pane, cx| {
1984                    pane.toolbar().update(cx, |toolbar, cx| {
1985                        toolbar.add_item(diff_toolbar, window, cx);
1986                    });
1987                })
1988            }
1989        });
1990
1991        let connection = Rc::new(acp_thread::StubAgentConnection::new());
1992        let thread = cx
1993            .update(|_, cx| {
1994                connection
1995                    .clone()
1996                    .new_thread(project.clone(), Path::new(path!("/test")), cx)
1997            })
1998            .await
1999            .unwrap();
2000        let action_log = thread.read_with(cx, |thread, _| thread.action_log().clone());
2001
2002        // Set the active thread
2003        let thread = AgentDiffThread::AcpThread(thread);
2004        cx.update(|window, cx| {
2005            AgentDiff::set_active_thread(&workspace.downgrade(), thread.clone(), window, cx)
2006        });
2007
2008        let buffer1 = project
2009            .update(cx, |project, cx| {
2010                project.open_buffer(buffer_path1.clone(), cx)
2011            })
2012            .await
2013            .unwrap();
2014        let buffer2 = project
2015            .update(cx, |project, cx| {
2016                project.open_buffer(buffer_path2.clone(), cx)
2017            })
2018            .await
2019            .unwrap();
2020
2021        // Open an editor for buffer1
2022        let editor1 = cx.new_window_entity(|window, cx| {
2023            Editor::for_buffer(buffer1.clone(), Some(project.clone()), window, cx)
2024        });
2025
2026        workspace.update_in(cx, |workspace, window, cx| {
2027            workspace.add_item_to_active_pane(Box::new(editor1.clone()), None, true, window, cx);
2028        });
2029        cx.run_until_parked();
2030
2031        // Toolbar knows about the current editor, but it's hidden since there are no changes yet
2032        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2033            toolbar.active_item,
2034            Some(AgentDiffToolbarItem::Editor {
2035                state: EditorState::Idle,
2036                ..
2037            })
2038        )));
2039        assert_eq!(
2040            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2041            ToolbarItemLocation::Hidden
2042        );
2043
2044        // Make changes
2045        cx.update(|_, cx| {
2046            action_log.update(cx, |log, cx| log.buffer_read(buffer1.clone(), cx));
2047            buffer1.update(cx, |buffer, cx| {
2048                buffer
2049                    .edit(
2050                        [
2051                            (Point::new(1, 1)..Point::new(1, 2), "E"),
2052                            (Point::new(3, 2)..Point::new(3, 3), "L"),
2053                            (Point::new(5, 0)..Point::new(5, 1), "P"),
2054                            (Point::new(7, 1)..Point::new(7, 2), "W"),
2055                        ],
2056                        None,
2057                        cx,
2058                    )
2059                    .unwrap()
2060            });
2061            action_log.update(cx, |log, cx| log.buffer_edited(buffer1.clone(), cx));
2062
2063            action_log.update(cx, |log, cx| log.buffer_read(buffer2.clone(), cx));
2064            buffer2.update(cx, |buffer, cx| {
2065                buffer
2066                    .edit(
2067                        [
2068                            (Point::new(0, 0)..Point::new(0, 1), "A"),
2069                            (Point::new(2, 1)..Point::new(2, 2), "H"),
2070                        ],
2071                        None,
2072                        cx,
2073                    )
2074                    .unwrap();
2075            });
2076            action_log.update(cx, |log, cx| log.buffer_edited(buffer2.clone(), cx));
2077        });
2078        cx.run_until_parked();
2079
2080        // The already opened editor displays the diff and the cursor is at the first hunk
2081        assert_eq!(
2082            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2083            "abc\ndef\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
2084        );
2085        assert_eq!(
2086            editor1
2087                .update(cx, |editor, cx| editor
2088                    .selections
2089                    .newest::<Point>(&editor.display_snapshot(cx)))
2090                .range(),
2091            Point::new(1, 0)..Point::new(1, 0)
2092        );
2093
2094        // The toolbar is displayed in the right state
2095        assert_eq!(
2096            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2097            ToolbarItemLocation::PrimaryRight
2098        );
2099        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2100            toolbar.active_item,
2101            Some(AgentDiffToolbarItem::Editor {
2102                state: EditorState::Reviewing,
2103                ..
2104            })
2105        )));
2106
2107        // The toolbar respects its setting
2108        override_toolbar_agent_review_setting(false, cx);
2109        assert_eq!(
2110            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2111            ToolbarItemLocation::Hidden
2112        );
2113        override_toolbar_agent_review_setting(true, cx);
2114        assert_eq!(
2115            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2116            ToolbarItemLocation::PrimaryRight
2117        );
2118
2119        // After keeping a hunk, the cursor should be positioned on the second hunk.
2120        workspace.update(cx, |_, cx| {
2121            cx.dispatch_action(&Keep);
2122        });
2123        cx.run_until_parked();
2124        assert_eq!(
2125            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2126            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
2127        );
2128        assert_eq!(
2129            editor1
2130                .update(cx, |editor, cx| editor
2131                    .selections
2132                    .newest::<Point>(&editor.display_snapshot(cx)))
2133                .range(),
2134            Point::new(3, 0)..Point::new(3, 0)
2135        );
2136
2137        // Rejecting a hunk also moves the cursor to the next hunk, possibly cycling if it's at the end.
2138        editor1.update_in(cx, |editor, window, cx| {
2139            editor.change_selections(SelectionEffects::no_scroll(), window, cx, |selections| {
2140                selections.select_ranges([Point::new(10, 0)..Point::new(10, 0)])
2141            });
2142        });
2143        workspace.update(cx, |_, cx| {
2144            cx.dispatch_action(&Reject);
2145        });
2146        cx.run_until_parked();
2147        assert_eq!(
2148            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2149            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nyz"
2150        );
2151        assert_eq!(
2152            editor1
2153                .update(cx, |editor, cx| editor
2154                    .selections
2155                    .newest::<Point>(&editor.display_snapshot(cx)))
2156                .range(),
2157            Point::new(3, 0)..Point::new(3, 0)
2158        );
2159
2160        // Keeping a range that doesn't intersect the current selection doesn't move it.
2161        editor1.update_in(cx, |editor, window, cx| {
2162            let buffer = editor.buffer().read(cx);
2163            let position = buffer.read(cx).anchor_before(Point::new(7, 0));
2164            let snapshot = buffer.snapshot(cx);
2165            keep_edits_in_ranges(
2166                editor,
2167                &snapshot,
2168                &thread,
2169                vec![position..position],
2170                window,
2171                cx,
2172            )
2173        });
2174        cx.run_until_parked();
2175        assert_eq!(
2176            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2177            "abc\ndEf\nghi\njkl\njkL\nmno\nPqr\nstu\nvwx\nyz"
2178        );
2179        assert_eq!(
2180            editor1
2181                .update(cx, |editor, cx| editor
2182                    .selections
2183                    .newest::<Point>(&editor.display_snapshot(cx)))
2184                .range(),
2185            Point::new(3, 0)..Point::new(3, 0)
2186        );
2187
2188        // Reviewing the last change opens the next changed buffer
2189        workspace
2190            .update_in(cx, |workspace, window, cx| {
2191                AgentDiff::global(cx).update(cx, |agent_diff, cx| {
2192                    agent_diff.review_in_active_editor(workspace, AgentDiff::keep, window, cx)
2193                })
2194            })
2195            .unwrap()
2196            .await
2197            .unwrap();
2198
2199        cx.run_until_parked();
2200
2201        let editor2 = workspace.update(cx, |workspace, cx| {
2202            workspace.active_item_as::<Editor>(cx).unwrap()
2203        });
2204
2205        let editor2_path = editor2
2206            .read_with(cx, |editor, cx| editor.project_path(cx))
2207            .unwrap();
2208        assert_eq!(editor2_path, buffer_path2);
2209
2210        assert_eq!(
2211            editor2.read_with(cx, |editor, cx| editor.text(cx)),
2212            "abc\nAbc\ndef\nghi\ngHi"
2213        );
2214        assert_eq!(
2215            editor2
2216                .update(cx, |editor, cx| editor
2217                    .selections
2218                    .newest::<Point>(&editor.display_snapshot(cx)))
2219                .range(),
2220            Point::new(0, 0)..Point::new(0, 0)
2221        );
2222
2223        // Editor 1 toolbar is hidden since all changes have been reviewed
2224        workspace.update_in(cx, |workspace, window, cx| {
2225            workspace.activate_item(&editor1, true, true, window, cx)
2226        });
2227
2228        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2229            toolbar.active_item,
2230            Some(AgentDiffToolbarItem::Editor {
2231                state: EditorState::Idle,
2232                ..
2233            })
2234        )));
2235        assert_eq!(
2236            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2237            ToolbarItemLocation::Hidden
2238        );
2239    }
2240
2241    fn override_toolbar_agent_review_setting(active: bool, cx: &mut VisualTestContext) {
2242        cx.update(|_window, cx| {
2243            SettingsStore::update_global(cx, |store, _cx| {
2244                let mut editor_settings = store.get::<EditorSettings>(None).clone();
2245                editor_settings.toolbar.agent_review = active;
2246                store.override_global(editor_settings);
2247            })
2248        });
2249        cx.run_until_parked();
2250    }
2251}