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    sync::Arc,
  29};
  30use ui::{CommonAnimationExt, IconButtonShape, KeyBinding, Tooltip, prelude::*, vertical_divider};
  31use util::ResultExt;
  32use workspace::{
  33    Item, ItemHandle, ItemNavHistory, ToolbarItemEvent, ToolbarItemLocation, ToolbarItemView,
  34    Workspace,
  35    item::{BreadcrumbText, ItemEvent, SaveOptions, TabContentParams},
  36    searchable::SearchableItemHandle,
  37};
  38use zed_actions::assistant::ToggleFocus;
  39
  40pub struct AgentDiffPane {
  41    multibuffer: Entity<MultiBuffer>,
  42    editor: Entity<Editor>,
  43    thread: AgentDiffThread,
  44    focus_handle: FocusHandle,
  45    workspace: WeakEntity<Workspace>,
  46    title: SharedString,
  47    _subscriptions: Vec<Subscription>,
  48}
  49
  50#[derive(PartialEq, Eq, Clone)]
  51pub enum AgentDiffThread {
  52    AcpThread(Entity<AcpThread>),
  53}
  54
  55impl AgentDiffThread {
  56    fn project(&self, cx: &App) -> Entity<Project> {
  57        match self {
  58            AgentDiffThread::AcpThread(thread) => thread.read(cx).project().clone(),
  59        }
  60    }
  61    fn action_log(&self, cx: &App) -> Entity<ActionLog> {
  62        match self {
  63            AgentDiffThread::AcpThread(thread) => thread.read(cx).action_log().clone(),
  64        }
  65    }
  66
  67    fn title(&self, cx: &App) -> SharedString {
  68        match self {
  69            AgentDiffThread::AcpThread(thread) => thread.read(cx).title(),
  70        }
  71    }
  72
  73    fn is_generating(&self, cx: &App) -> bool {
  74        match self {
  75            AgentDiffThread::AcpThread(thread) => {
  76                thread.read(cx).status() == acp_thread::ThreadStatus::Generating
  77            }
  78        }
  79    }
  80
  81    fn has_pending_edit_tool_uses(&self, cx: &App) -> bool {
  82        match self {
  83            AgentDiffThread::AcpThread(thread) => thread.read(cx).has_pending_edit_tool_calls(),
  84        }
  85    }
  86
  87    fn downgrade(&self) -> WeakAgentDiffThread {
  88        match self {
  89            AgentDiffThread::AcpThread(thread) => {
  90                WeakAgentDiffThread::AcpThread(thread.downgrade())
  91            }
  92        }
  93    }
  94}
  95
  96impl From<Entity<AcpThread>> for AgentDiffThread {
  97    fn from(entity: Entity<AcpThread>) -> Self {
  98        AgentDiffThread::AcpThread(entity)
  99    }
 100}
 101
 102#[derive(PartialEq, Eq, Clone)]
 103pub enum WeakAgentDiffThread {
 104    AcpThread(WeakEntity<AcpThread>),
 105}
 106
 107impl WeakAgentDiffThread {
 108    pub fn upgrade(&self) -> Option<AgentDiffThread> {
 109        match self {
 110            WeakAgentDiffThread::AcpThread(weak) => weak.upgrade().map(AgentDiffThread::AcpThread),
 111        }
 112    }
 113}
 114
 115impl From<WeakEntity<AcpThread>> for WeakAgentDiffThread {
 116    fn from(entity: WeakEntity<AcpThread>) -> Self {
 117        WeakAgentDiffThread::AcpThread(entity)
 118    }
 119}
 120
 121impl AgentDiffPane {
 122    pub fn deploy(
 123        thread: impl Into<AgentDiffThread>,
 124        workspace: WeakEntity<Workspace>,
 125        window: &mut Window,
 126        cx: &mut App,
 127    ) -> Result<Entity<Self>> {
 128        workspace.update(cx, |workspace, cx| {
 129            Self::deploy_in_workspace(thread, workspace, window, cx)
 130        })
 131    }
 132
 133    pub fn deploy_in_workspace(
 134        thread: impl Into<AgentDiffThread>,
 135        workspace: &mut Workspace,
 136        window: &mut Window,
 137        cx: &mut Context<Workspace>,
 138    ) -> Entity<Self> {
 139        let thread = thread.into();
 140        let existing_diff = workspace
 141            .items_of_type::<AgentDiffPane>(cx)
 142            .find(|diff| diff.read(cx).thread == thread);
 143
 144        if let Some(existing_diff) = existing_diff {
 145            workspace.activate_item(&existing_diff, true, true, window, cx);
 146            existing_diff
 147        } else {
 148            let agent_diff = cx
 149                .new(|cx| AgentDiffPane::new(thread.clone(), workspace.weak_handle(), window, cx));
 150            workspace.add_item_to_center(Box::new(agent_diff.clone()), window, cx);
 151            agent_diff
 152        }
 153    }
 154
 155    pub fn new(
 156        thread: AgentDiffThread,
 157        workspace: WeakEntity<Workspace>,
 158        window: &mut Window,
 159        cx: &mut Context<Self>,
 160    ) -> Self {
 161        let focus_handle = cx.focus_handle();
 162        let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
 163
 164        let project = thread.project(cx);
 165        let editor = cx.new(|cx| {
 166            let mut editor =
 167                Editor::for_multibuffer(multibuffer.clone(), Some(project.clone()), window, cx);
 168            editor.disable_inline_diagnostics();
 169            editor.set_expand_all_diff_hunks(cx);
 170            editor.set_render_diff_hunk_controls(diff_hunk_controls(&thread), cx);
 171            editor.register_addon(AgentDiffAddon);
 172            editor
 173        });
 174
 175        let action_log = thread.action_log(cx);
 176
 177        let mut this = Self {
 178            _subscriptions: vec![
 179                cx.observe_in(&action_log, window, |this, _action_log, window, cx| {
 180                    this.update_excerpts(window, cx)
 181                }),
 182                match &thread {
 183                    AgentDiffThread::AcpThread(thread) => cx
 184                        .subscribe(thread, |this, _thread, event, cx| {
 185                            this.handle_acp_thread_event(event, cx)
 186                        }),
 187                },
 188            ],
 189            title: SharedString::default(),
 190            multibuffer,
 191            editor,
 192            thread,
 193            focus_handle,
 194            workspace,
 195        };
 196        this.update_excerpts(window, cx);
 197        this.update_title(cx);
 198        this
 199    }
 200
 201    fn update_excerpts(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 202        let changed_buffers = self.thread.action_log(cx).read(cx).changed_buffers(cx);
 203        let mut paths_to_delete = self.multibuffer.read(cx).paths().collect::<HashSet<_>>();
 204
 205        for (buffer, diff_handle) in changed_buffers {
 206            if buffer.read(cx).file().is_none() {
 207                continue;
 208            }
 209
 210            let path_key = PathKey::for_buffer(&buffer, cx);
 211            paths_to_delete.remove(&path_key);
 212
 213            let snapshot = buffer.read(cx).snapshot();
 214            let diff = diff_handle.read(cx);
 215
 216            let diff_hunk_ranges = diff
 217                .hunks_intersecting_range(
 218                    language::Anchor::MIN..language::Anchor::MAX,
 219                    &snapshot,
 220                    cx,
 221                )
 222                .map(|diff_hunk| diff_hunk.buffer_range.to_point(&snapshot))
 223                .collect::<Vec<_>>();
 224
 225            let (was_empty, is_excerpt_newly_added) =
 226                self.multibuffer.update(cx, |multibuffer, cx| {
 227                    let was_empty = multibuffer.is_empty();
 228                    let (_, is_excerpt_newly_added) = multibuffer.set_excerpts_for_path(
 229                        path_key.clone(),
 230                        buffer.clone(),
 231                        diff_hunk_ranges,
 232                        multibuffer_context_lines(cx),
 233                        cx,
 234                    );
 235                    multibuffer.add_diff(diff_handle, cx);
 236                    (was_empty, is_excerpt_newly_added)
 237                });
 238
 239            self.editor.update(cx, |editor, cx| {
 240                if was_empty {
 241                    let first_hunk = editor
 242                        .diff_hunks_in_ranges(
 243                            &[editor::Anchor::min()..editor::Anchor::max()],
 244                            &self.multibuffer.read(cx).read(cx),
 245                        )
 246                        .next();
 247
 248                    if let Some(first_hunk) = first_hunk {
 249                        let first_hunk_start = first_hunk.multi_buffer_range().start;
 250                        editor.change_selections(Default::default(), window, cx, |selections| {
 251                            selections.select_anchor_ranges([first_hunk_start..first_hunk_start]);
 252                        })
 253                    }
 254                }
 255
 256                if is_excerpt_newly_added
 257                    && buffer
 258                        .read(cx)
 259                        .file()
 260                        .is_some_and(|file| file.disk_state() == DiskState::Deleted)
 261                {
 262                    editor.fold_buffer(snapshot.text.remote_id(), cx)
 263                }
 264            });
 265        }
 266
 267        self.multibuffer.update(cx, |multibuffer, cx| {
 268            for path in paths_to_delete {
 269                multibuffer.remove_excerpts_for_path(path, cx);
 270            }
 271        });
 272
 273        if self.multibuffer.read(cx).is_empty()
 274            && self
 275                .editor
 276                .read(cx)
 277                .focus_handle(cx)
 278                .contains_focused(window, cx)
 279        {
 280            self.focus_handle.focus(window);
 281        } else if self.focus_handle.is_focused(window) && !self.multibuffer.read(cx).is_empty() {
 282            self.editor.update(cx, |editor, cx| {
 283                editor.focus_handle(cx).focus(window);
 284            });
 285        }
 286    }
 287
 288    fn update_title(&mut self, cx: &mut Context<Self>) {
 289        let new_title = self.thread.title(cx);
 290        if new_title != self.title {
 291            self.title = new_title;
 292            cx.emit(EditorEvent::TitleChanged);
 293        }
 294    }
 295
 296    fn handle_acp_thread_event(&mut self, event: &AcpThreadEvent, cx: &mut Context<Self>) {
 297        if let AcpThreadEvent::TitleUpdated = event {
 298            self.update_title(cx)
 299        }
 300    }
 301
 302    pub fn move_to_path(&self, path_key: PathKey, window: &mut Window, cx: &mut App) {
 303        if let Some(position) = self.multibuffer.read(cx).location_for_path(&path_key, cx) {
 304            self.editor.update(cx, |editor, cx| {
 305                let first_hunk = editor
 306                    .diff_hunks_in_ranges(
 307                        &[position..editor::Anchor::max()],
 308                        &self.multibuffer.read(cx).read(cx),
 309                    )
 310                    .next();
 311
 312                if let Some(first_hunk) = first_hunk {
 313                    let first_hunk_start = first_hunk.multi_buffer_range().start;
 314                    editor.change_selections(Default::default(), window, cx, |selections| {
 315                        selections.select_anchor_ranges([first_hunk_start..first_hunk_start]);
 316                    })
 317                }
 318            });
 319        }
 320    }
 321
 322    fn keep(&mut self, _: &Keep, window: &mut Window, cx: &mut Context<Self>) {
 323        self.editor.update(cx, |editor, cx| {
 324            let snapshot = editor.buffer().read(cx).snapshot(cx);
 325            keep_edits_in_selection(editor, &snapshot, &self.thread, window, cx);
 326        });
 327    }
 328
 329    fn reject(&mut self, _: &Reject, 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_selection(editor, &snapshot, &self.thread, window, cx);
 333        });
 334    }
 335
 336    fn reject_all(&mut self, _: &RejectAll, window: &mut Window, cx: &mut Context<Self>) {
 337        self.editor.update(cx, |editor, cx| {
 338            let snapshot = editor.buffer().read(cx).snapshot(cx);
 339            reject_edits_in_ranges(
 340                editor,
 341                &snapshot,
 342                &self.thread,
 343                vec![editor::Anchor::min()..editor::Anchor::max()],
 344                window,
 345                cx,
 346            );
 347        });
 348    }
 349
 350    fn keep_all(&mut self, _: &KeepAll, _window: &mut Window, cx: &mut Context<Self>) {
 351        self.thread
 352            .action_log(cx)
 353            .update(cx, |action_log, cx| action_log.keep_all_edits(cx))
 354    }
 355}
 356
 357fn keep_edits_in_selection(
 358    editor: &mut Editor,
 359    buffer_snapshot: &MultiBufferSnapshot,
 360    thread: &AgentDiffThread,
 361    window: &mut Window,
 362    cx: &mut Context<Editor>,
 363) {
 364    let ranges = editor
 365        .selections
 366        .disjoint_anchor_ranges()
 367        .collect::<Vec<_>>();
 368
 369    keep_edits_in_ranges(editor, buffer_snapshot, thread, ranges, window, cx)
 370}
 371
 372fn reject_edits_in_selection(
 373    editor: &mut Editor,
 374    buffer_snapshot: &MultiBufferSnapshot,
 375    thread: &AgentDiffThread,
 376    window: &mut Window,
 377    cx: &mut Context<Editor>,
 378) {
 379    let ranges = editor
 380        .selections
 381        .disjoint_anchor_ranges()
 382        .collect::<Vec<_>>();
 383    reject_edits_in_ranges(editor, buffer_snapshot, thread, ranges, window, cx)
 384}
 385
 386fn keep_edits_in_ranges(
 387    editor: &mut Editor,
 388    buffer_snapshot: &MultiBufferSnapshot,
 389    thread: &AgentDiffThread,
 390    ranges: Vec<Range<editor::Anchor>>,
 391    window: &mut Window,
 392    cx: &mut Context<Editor>,
 393) {
 394    let diff_hunks_in_ranges = editor
 395        .diff_hunks_in_ranges(&ranges, buffer_snapshot)
 396        .collect::<Vec<_>>();
 397
 398    update_editor_selection(editor, buffer_snapshot, &diff_hunks_in_ranges, window, cx);
 399
 400    let multibuffer = editor.buffer().clone();
 401    for hunk in &diff_hunks_in_ranges {
 402        let buffer = multibuffer.read(cx).buffer(hunk.buffer_id);
 403        if let Some(buffer) = buffer {
 404            thread.action_log(cx).update(cx, |action_log, cx| {
 405                action_log.keep_edits_in_range(buffer, hunk.buffer_range.clone(), cx)
 406            });
 407        }
 408    }
 409}
 410
 411fn reject_edits_in_ranges(
 412    editor: &mut Editor,
 413    buffer_snapshot: &MultiBufferSnapshot,
 414    thread: &AgentDiffThread,
 415    ranges: Vec<Range<editor::Anchor>>,
 416    window: &mut Window,
 417    cx: &mut Context<Editor>,
 418) {
 419    let diff_hunks_in_ranges = editor
 420        .diff_hunks_in_ranges(&ranges, buffer_snapshot)
 421        .collect::<Vec<_>>();
 422
 423    update_editor_selection(editor, buffer_snapshot, &diff_hunks_in_ranges, window, cx);
 424
 425    let multibuffer = editor.buffer().clone();
 426
 427    let mut ranges_by_buffer = HashMap::default();
 428    for hunk in &diff_hunks_in_ranges {
 429        let buffer = multibuffer.read(cx).buffer(hunk.buffer_id);
 430        if let Some(buffer) = buffer {
 431            ranges_by_buffer
 432                .entry(buffer.clone())
 433                .or_insert_with(Vec::new)
 434                .push(hunk.buffer_range.clone());
 435        }
 436    }
 437
 438    for (buffer, ranges) in ranges_by_buffer {
 439        thread
 440            .action_log(cx)
 441            .update(cx, |action_log, cx| {
 442                action_log.reject_edits_in_ranges(buffer, ranges, cx)
 443            })
 444            .detach_and_log_err(cx);
 445    }
 446}
 447
 448fn update_editor_selection(
 449    editor: &mut Editor,
 450    buffer_snapshot: &MultiBufferSnapshot,
 451    diff_hunks: &[multi_buffer::MultiBufferDiffHunk],
 452    window: &mut Window,
 453    cx: &mut Context<Editor>,
 454) {
 455    let newest_cursor = editor
 456        .selections
 457        .newest::<Point>(&editor.display_snapshot(cx))
 458        .head();
 459
 460    if !diff_hunks.iter().any(|hunk| {
 461        hunk.row_range
 462            .contains(&multi_buffer::MultiBufferRow(newest_cursor.row))
 463    }) {
 464        return;
 465    }
 466
 467    let target_hunk = {
 468        diff_hunks
 469            .last()
 470            .and_then(|last_kept_hunk| {
 471                let last_kept_hunk_end = last_kept_hunk.multi_buffer_range().end;
 472                editor
 473                    .diff_hunks_in_ranges(
 474                        &[last_kept_hunk_end..editor::Anchor::max()],
 475                        buffer_snapshot,
 476                    )
 477                    .nth(1)
 478            })
 479            .or_else(|| {
 480                let first_kept_hunk = diff_hunks.first()?;
 481                let first_kept_hunk_start = first_kept_hunk.multi_buffer_range().start;
 482                editor
 483                    .diff_hunks_in_ranges(
 484                        &[editor::Anchor::min()..first_kept_hunk_start],
 485                        buffer_snapshot,
 486                    )
 487                    .next()
 488            })
 489    };
 490
 491    if let Some(target_hunk) = target_hunk {
 492        editor.change_selections(Default::default(), window, cx, |selections| {
 493            let next_hunk_start = target_hunk.multi_buffer_range().start;
 494            selections.select_anchor_ranges([next_hunk_start..next_hunk_start]);
 495        })
 496    }
 497}
 498
 499impl EventEmitter<EditorEvent> for AgentDiffPane {}
 500
 501impl Focusable for AgentDiffPane {
 502    fn focus_handle(&self, cx: &App) -> FocusHandle {
 503        if self.multibuffer.read(cx).is_empty() {
 504            self.focus_handle.clone()
 505        } else {
 506            self.editor.focus_handle(cx)
 507        }
 508    }
 509}
 510
 511impl Item for AgentDiffPane {
 512    type Event = EditorEvent;
 513
 514    fn tab_icon(&self, _window: &Window, _cx: &App) -> Option<Icon> {
 515        Some(Icon::new(IconName::ZedAssistant).color(Color::Muted))
 516    }
 517
 518    fn to_item_events(event: &EditorEvent, f: impl FnMut(ItemEvent)) {
 519        Editor::to_item_events(event, f)
 520    }
 521
 522    fn deactivated(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 523        self.editor
 524            .update(cx, |editor, cx| editor.deactivated(window, cx));
 525    }
 526
 527    fn navigate(
 528        &mut self,
 529        data: Box<dyn Any>,
 530        window: &mut Window,
 531        cx: &mut Context<Self>,
 532    ) -> bool {
 533        self.editor
 534            .update(cx, |editor, cx| editor.navigate(data, window, cx))
 535    }
 536
 537    fn tab_tooltip_text(&self, _: &App) -> Option<SharedString> {
 538        Some("Agent Diff".into())
 539    }
 540
 541    fn tab_content(&self, params: TabContentParams, _window: &Window, cx: &App) -> AnyElement {
 542        let title = self.thread.title(cx);
 543        Label::new(format!("Review: {}", title))
 544            .color(if params.selected {
 545                Color::Default
 546            } else {
 547                Color::Muted
 548            })
 549            .into_any_element()
 550    }
 551
 552    fn telemetry_event_text(&self) -> Option<&'static str> {
 553        Some("Assistant Diff Opened")
 554    }
 555
 556    fn as_searchable(&self, _: &Entity<Self>) -> Option<Box<dyn SearchableItemHandle>> {
 557        Some(Box::new(self.editor.clone()))
 558    }
 559
 560    fn for_each_project_item(
 561        &self,
 562        cx: &App,
 563        f: &mut dyn FnMut(gpui::EntityId, &dyn project::ProjectItem),
 564    ) {
 565        self.editor.for_each_project_item(cx, f)
 566    }
 567
 568    fn set_nav_history(
 569        &mut self,
 570        nav_history: ItemNavHistory,
 571        _: &mut Window,
 572        cx: &mut Context<Self>,
 573    ) {
 574        self.editor.update(cx, |editor, _| {
 575            editor.set_nav_history(Some(nav_history));
 576        });
 577    }
 578
 579    fn clone_on_split(
 580        &self,
 581        _workspace_id: Option<workspace::WorkspaceId>,
 582        window: &mut Window,
 583        cx: &mut Context<Self>,
 584    ) -> Option<Entity<Self>>
 585    where
 586        Self: Sized,
 587    {
 588        Some(cx.new(|cx| Self::new(self.thread.clone(), self.workspace.clone(), window, cx)))
 589    }
 590
 591    fn is_dirty(&self, cx: &App) -> bool {
 592        self.multibuffer.read(cx).is_dirty(cx)
 593    }
 594
 595    fn has_conflict(&self, cx: &App) -> bool {
 596        self.multibuffer.read(cx).has_conflict(cx)
 597    }
 598
 599    fn can_save(&self, _: &App) -> bool {
 600        true
 601    }
 602
 603    fn save(
 604        &mut self,
 605        options: SaveOptions,
 606        project: Entity<Project>,
 607        window: &mut Window,
 608        cx: &mut Context<Self>,
 609    ) -> Task<Result<()>> {
 610        self.editor.save(options, project, window, cx)
 611    }
 612
 613    fn save_as(
 614        &mut self,
 615        _: Entity<Project>,
 616        _: ProjectPath,
 617        _window: &mut Window,
 618        _: &mut Context<Self>,
 619    ) -> Task<Result<()>> {
 620        unreachable!()
 621    }
 622
 623    fn reload(
 624        &mut self,
 625        project: Entity<Project>,
 626        window: &mut Window,
 627        cx: &mut Context<Self>,
 628    ) -> Task<Result<()>> {
 629        self.editor.reload(project, window, cx)
 630    }
 631
 632    fn act_as_type<'a>(
 633        &'a self,
 634        type_id: TypeId,
 635        self_handle: &'a Entity<Self>,
 636        _: &'a App,
 637    ) -> Option<AnyView> {
 638        if type_id == TypeId::of::<Self>() {
 639            Some(self_handle.to_any())
 640        } else if type_id == TypeId::of::<Editor>() {
 641            Some(self.editor.to_any())
 642        } else {
 643            None
 644        }
 645    }
 646
 647    fn breadcrumb_location(&self, _: &App) -> ToolbarItemLocation {
 648        ToolbarItemLocation::PrimaryLeft
 649    }
 650
 651    fn breadcrumbs(&self, theme: &theme::Theme, cx: &App) -> Option<Vec<BreadcrumbText>> {
 652        self.editor.breadcrumbs(theme, cx)
 653    }
 654
 655    fn added_to_workspace(
 656        &mut self,
 657        workspace: &mut Workspace,
 658        window: &mut Window,
 659        cx: &mut Context<Self>,
 660    ) {
 661        self.editor.update(cx, |editor, cx| {
 662            editor.added_to_workspace(workspace, window, cx)
 663        });
 664    }
 665
 666    fn tab_content_text(&self, _detail: usize, _cx: &App) -> SharedString {
 667        "Agent Diff".into()
 668    }
 669}
 670
 671impl Render for AgentDiffPane {
 672    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
 673        let is_empty = self.multibuffer.read(cx).is_empty();
 674        let focus_handle = &self.focus_handle;
 675
 676        div()
 677            .track_focus(focus_handle)
 678            .key_context(if is_empty { "EmptyPane" } else { "AgentDiff" })
 679            .on_action(cx.listener(Self::keep))
 680            .on_action(cx.listener(Self::reject))
 681            .on_action(cx.listener(Self::reject_all))
 682            .on_action(cx.listener(Self::keep_all))
 683            .bg(cx.theme().colors().editor_background)
 684            .flex()
 685            .items_center()
 686            .justify_center()
 687            .size_full()
 688            .when(is_empty, |el| {
 689                el.child(
 690                    v_flex()
 691                        .items_center()
 692                        .gap_2()
 693                        .child("No changes to review")
 694                        .child(
 695                            Button::new("continue-iterating", "Continue Iterating")
 696                                .style(ButtonStyle::Filled)
 697                                .icon(IconName::ForwardArrow)
 698                                .icon_position(IconPosition::Start)
 699                                .icon_size(IconSize::Small)
 700                                .icon_color(Color::Muted)
 701                                .full_width()
 702                                .key_binding(KeyBinding::for_action_in(
 703                                    &ToggleFocus,
 704                                    &focus_handle.clone(),
 705                                    cx,
 706                                ))
 707                                .on_click(|_event, window, cx| {
 708                                    window.dispatch_action(ToggleFocus.boxed_clone(), cx)
 709                                }),
 710                        ),
 711                )
 712            })
 713            .when(!is_empty, |el| el.child(self.editor.clone()))
 714    }
 715}
 716
 717fn diff_hunk_controls(thread: &AgentDiffThread) -> editor::RenderDiffHunkControlsFn {
 718    let thread = thread.clone();
 719
 720    Arc::new(
 721        move |row, status, hunk_range, is_created_file, line_height, editor, _, cx| {
 722            {
 723                render_diff_hunk_controls(
 724                    row,
 725                    status,
 726                    hunk_range,
 727                    is_created_file,
 728                    line_height,
 729                    &thread,
 730                    editor,
 731                    cx,
 732                )
 733            }
 734        },
 735    )
 736}
 737
 738fn render_diff_hunk_controls(
 739    row: u32,
 740    _status: &DiffHunkStatus,
 741    hunk_range: Range<editor::Anchor>,
 742    is_created_file: bool,
 743    line_height: Pixels,
 744    thread: &AgentDiffThread,
 745    editor: &Entity<Editor>,
 746    cx: &mut App,
 747) -> AnyElement {
 748    let editor = editor.clone();
 749
 750    h_flex()
 751        .h(line_height)
 752        .mr_0p5()
 753        .gap_1()
 754        .px_0p5()
 755        .pb_1()
 756        .border_x_1()
 757        .border_b_1()
 758        .border_color(cx.theme().colors().border)
 759        .rounded_b_md()
 760        .bg(cx.theme().colors().editor_background)
 761        .gap_1()
 762        .block_mouse_except_scroll()
 763        .shadow_md()
 764        .children(vec![
 765            Button::new(("reject", row as u64), "Reject")
 766                .disabled(is_created_file)
 767                .key_binding(
 768                    KeyBinding::for_action_in(&Reject, &editor.read(cx).focus_handle(cx), cx)
 769                        .map(|kb| kb.size(rems_from_px(12.))),
 770                )
 771                .on_click({
 772                    let editor = editor.clone();
 773                    let thread = thread.clone();
 774                    move |_event, window, cx| {
 775                        editor.update(cx, |editor, cx| {
 776                            let snapshot = editor.buffer().read(cx).snapshot(cx);
 777                            reject_edits_in_ranges(
 778                                editor,
 779                                &snapshot,
 780                                &thread,
 781                                vec![hunk_range.start..hunk_range.start],
 782                                window,
 783                                cx,
 784                            );
 785                        })
 786                    }
 787                }),
 788            Button::new(("keep", row as u64), "Keep")
 789                .key_binding(
 790                    KeyBinding::for_action_in(&Keep, &editor.read(cx).focus_handle(cx), cx)
 791                        .map(|kb| kb.size(rems_from_px(12.))),
 792                )
 793                .on_click({
 794                    let editor = editor.clone();
 795                    let thread = thread.clone();
 796                    move |_event, window, cx| {
 797                        editor.update(cx, |editor, cx| {
 798                            let snapshot = editor.buffer().read(cx).snapshot(cx);
 799                            keep_edits_in_ranges(
 800                                editor,
 801                                &snapshot,
 802                                &thread,
 803                                vec![hunk_range.start..hunk_range.start],
 804                                window,
 805                                cx,
 806                            );
 807                        });
 808                    }
 809                }),
 810        ])
 811        .when(
 812            !editor.read(cx).buffer().read(cx).all_diff_hunks_expanded(),
 813            |el| {
 814                el.child(
 815                    IconButton::new(("next-hunk", row as u64), IconName::ArrowDown)
 816                        .shape(IconButtonShape::Square)
 817                        .icon_size(IconSize::Small)
 818                        // .disabled(!has_multiple_hunks)
 819                        .tooltip({
 820                            let focus_handle = editor.focus_handle(cx);
 821                            move |_window, cx| {
 822                                Tooltip::for_action_in("Next Hunk", &GoToHunk, &focus_handle, cx)
 823                            }
 824                        })
 825                        .on_click({
 826                            let editor = editor.clone();
 827                            move |_event, window, cx| {
 828                                editor.update(cx, |editor, cx| {
 829                                    let snapshot = editor.snapshot(window, cx);
 830                                    let position =
 831                                        hunk_range.end.to_point(&snapshot.buffer_snapshot());
 832                                    editor.go_to_hunk_before_or_after_position(
 833                                        &snapshot,
 834                                        position,
 835                                        Direction::Next,
 836                                        window,
 837                                        cx,
 838                                    );
 839                                    editor.expand_selected_diff_hunks(cx);
 840                                });
 841                            }
 842                        }),
 843                )
 844                .child(
 845                    IconButton::new(("prev-hunk", row as u64), IconName::ArrowUp)
 846                        .shape(IconButtonShape::Square)
 847                        .icon_size(IconSize::Small)
 848                        // .disabled(!has_multiple_hunks)
 849                        .tooltip({
 850                            let focus_handle = editor.focus_handle(cx);
 851                            move |_window, cx| {
 852                                Tooltip::for_action_in(
 853                                    "Previous Hunk",
 854                                    &GoToPreviousHunk,
 855                                    &focus_handle,
 856                                    cx,
 857                                )
 858                            }
 859                        })
 860                        .on_click({
 861                            let editor = editor.clone();
 862                            move |_event, window, cx| {
 863                                editor.update(cx, |editor, cx| {
 864                                    let snapshot = editor.snapshot(window, cx);
 865                                    let point =
 866                                        hunk_range.start.to_point(&snapshot.buffer_snapshot());
 867                                    editor.go_to_hunk_before_or_after_position(
 868                                        &snapshot,
 869                                        point,
 870                                        Direction::Prev,
 871                                        window,
 872                                        cx,
 873                                    );
 874                                    editor.expand_selected_diff_hunks(cx);
 875                                });
 876                            }
 877                        }),
 878                )
 879            },
 880        )
 881        .into_any_element()
 882}
 883
 884struct AgentDiffAddon;
 885
 886impl editor::Addon for AgentDiffAddon {
 887    fn to_any(&self) -> &dyn std::any::Any {
 888        self
 889    }
 890
 891    fn extend_key_context(&self, key_context: &mut gpui::KeyContext, _: &App) {
 892        key_context.add("agent_diff");
 893    }
 894}
 895
 896pub struct AgentDiffToolbar {
 897    active_item: Option<AgentDiffToolbarItem>,
 898    _settings_subscription: Subscription,
 899}
 900
 901pub enum AgentDiffToolbarItem {
 902    Pane(WeakEntity<AgentDiffPane>),
 903    Editor {
 904        editor: WeakEntity<Editor>,
 905        state: EditorState,
 906        _diff_subscription: Subscription,
 907    },
 908}
 909
 910impl AgentDiffToolbar {
 911    pub fn new(cx: &mut Context<Self>) -> Self {
 912        Self {
 913            active_item: None,
 914            _settings_subscription: cx.observe_global::<SettingsStore>(Self::update_location),
 915        }
 916    }
 917
 918    fn dispatch_action(&self, action: &dyn Action, window: &mut Window, cx: &mut Context<Self>) {
 919        let Some(active_item) = self.active_item.as_ref() else {
 920            return;
 921        };
 922
 923        match active_item {
 924            AgentDiffToolbarItem::Pane(agent_diff) => {
 925                if let Some(agent_diff) = agent_diff.upgrade() {
 926                    agent_diff.focus_handle(cx).focus(window);
 927                }
 928            }
 929            AgentDiffToolbarItem::Editor { editor, .. } => {
 930                if let Some(editor) = editor.upgrade() {
 931                    editor.read(cx).focus_handle(cx).focus(window);
 932                }
 933            }
 934        }
 935
 936        let action = action.boxed_clone();
 937        cx.defer(move |cx| {
 938            cx.dispatch_action(action.as_ref());
 939        })
 940    }
 941
 942    fn handle_diff_notify(&mut self, agent_diff: Entity<AgentDiff>, cx: &mut Context<Self>) {
 943        let Some(AgentDiffToolbarItem::Editor { editor, state, .. }) = self.active_item.as_mut()
 944        else {
 945            return;
 946        };
 947
 948        *state = agent_diff.read(cx).editor_state(editor);
 949        self.update_location(cx);
 950        cx.notify();
 951    }
 952
 953    fn update_location(&mut self, cx: &mut Context<Self>) {
 954        let location = self.location(cx);
 955        cx.emit(ToolbarItemEvent::ChangeLocation(location));
 956    }
 957
 958    fn location(&self, cx: &App) -> ToolbarItemLocation {
 959        if !EditorSettings::get_global(cx).toolbar.agent_review {
 960            return ToolbarItemLocation::Hidden;
 961        }
 962
 963        match &self.active_item {
 964            None => ToolbarItemLocation::Hidden,
 965            Some(AgentDiffToolbarItem::Pane(_)) => ToolbarItemLocation::PrimaryRight,
 966            Some(AgentDiffToolbarItem::Editor { state, .. }) => match state {
 967                EditorState::Generating | EditorState::Reviewing => {
 968                    ToolbarItemLocation::PrimaryRight
 969                }
 970                EditorState::Idle => ToolbarItemLocation::Hidden,
 971            },
 972        }
 973    }
 974}
 975
 976impl EventEmitter<ToolbarItemEvent> for AgentDiffToolbar {}
 977
 978impl ToolbarItemView for AgentDiffToolbar {
 979    fn set_active_pane_item(
 980        &mut self,
 981        active_pane_item: Option<&dyn ItemHandle>,
 982        _: &mut Window,
 983        cx: &mut Context<Self>,
 984    ) -> ToolbarItemLocation {
 985        if let Some(item) = active_pane_item {
 986            if let Some(pane) = item.act_as::<AgentDiffPane>(cx) {
 987                self.active_item = Some(AgentDiffToolbarItem::Pane(pane.downgrade()));
 988                return self.location(cx);
 989            }
 990
 991            if let Some(editor) = item.act_as::<Editor>(cx)
 992                && editor.read(cx).mode().is_full()
 993            {
 994                let agent_diff = AgentDiff::global(cx);
 995
 996                self.active_item = Some(AgentDiffToolbarItem::Editor {
 997                    editor: editor.downgrade(),
 998                    state: agent_diff.read(cx).editor_state(&editor.downgrade()),
 999                    _diff_subscription: cx.observe(&agent_diff, Self::handle_diff_notify),
1000                });
1001
1002                return self.location(cx);
1003            }
1004        }
1005
1006        self.active_item = None;
1007        self.location(cx)
1008    }
1009
1010    fn pane_focus_update(
1011        &mut self,
1012        _pane_focused: bool,
1013        _window: &mut Window,
1014        _cx: &mut Context<Self>,
1015    ) {
1016    }
1017}
1018
1019impl Render for AgentDiffToolbar {
1020    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
1021        let spinner_icon = div()
1022            .px_0p5()
1023            .id("generating")
1024            .tooltip(Tooltip::text("Generating Changes…"))
1025            .child(
1026                Icon::new(IconName::LoadCircle)
1027                    .size(IconSize::Small)
1028                    .color(Color::Accent)
1029                    .with_rotate_animation(3),
1030            )
1031            .into_any();
1032
1033        let Some(active_item) = self.active_item.as_ref() else {
1034            return Empty.into_any();
1035        };
1036
1037        match active_item {
1038            AgentDiffToolbarItem::Editor { editor, state, .. } => {
1039                let Some(editor) = editor.upgrade() else {
1040                    return Empty.into_any();
1041                };
1042
1043                let editor_focus_handle = editor.read(cx).focus_handle(cx);
1044
1045                let content = match state {
1046                    EditorState::Idle => return Empty.into_any(),
1047                    EditorState::Generating => vec![spinner_icon],
1048                    EditorState::Reviewing => vec![
1049                        h_flex()
1050                            .child(
1051                                IconButton::new("hunk-up", IconName::ArrowUp)
1052                                    .icon_size(IconSize::Small)
1053                                    .tooltip(Tooltip::for_action_title_in(
1054                                        "Previous Hunk",
1055                                        &GoToPreviousHunk,
1056                                        &editor_focus_handle,
1057                                    ))
1058                                    .on_click({
1059                                        let editor_focus_handle = editor_focus_handle.clone();
1060                                        move |_, window, cx| {
1061                                            editor_focus_handle.dispatch_action(
1062                                                &GoToPreviousHunk,
1063                                                window,
1064                                                cx,
1065                                            );
1066                                        }
1067                                    }),
1068                            )
1069                            .child(
1070                                IconButton::new("hunk-down", IconName::ArrowDown)
1071                                    .icon_size(IconSize::Small)
1072                                    .tooltip(Tooltip::for_action_title_in(
1073                                        "Next Hunk",
1074                                        &GoToHunk,
1075                                        &editor_focus_handle,
1076                                    ))
1077                                    .on_click({
1078                                        let editor_focus_handle = editor_focus_handle.clone();
1079                                        move |_, window, cx| {
1080                                            editor_focus_handle
1081                                                .dispatch_action(&GoToHunk, window, cx);
1082                                        }
1083                                    }),
1084                            )
1085                            .into_any_element(),
1086                        vertical_divider().into_any_element(),
1087                        h_flex()
1088                            .gap_0p5()
1089                            .child(
1090                                Button::new("reject-all", "Reject All")
1091                                    .key_binding({
1092                                        KeyBinding::for_action_in(
1093                                            &RejectAll,
1094                                            &editor_focus_handle,
1095                                            cx,
1096                                        )
1097                                        .map(|kb| kb.size(rems_from_px(12.)))
1098                                    })
1099                                    .on_click(cx.listener(|this, _, window, cx| {
1100                                        this.dispatch_action(&RejectAll, window, cx)
1101                                    })),
1102                            )
1103                            .child(
1104                                Button::new("keep-all", "Keep All")
1105                                    .key_binding({
1106                                        KeyBinding::for_action_in(
1107                                            &KeepAll,
1108                                            &editor_focus_handle,
1109                                            cx,
1110                                        )
1111                                        .map(|kb| kb.size(rems_from_px(12.)))
1112                                    })
1113                                    .on_click(cx.listener(|this, _, window, cx| {
1114                                        this.dispatch_action(&KeepAll, window, cx)
1115                                    })),
1116                            )
1117                            .into_any_element(),
1118                    ],
1119                };
1120
1121                h_flex()
1122                    .track_focus(&editor_focus_handle)
1123                    .size_full()
1124                    .px_1()
1125                    .mr_1()
1126                    .gap_1()
1127                    .children(content)
1128                    .child(vertical_divider())
1129                    .when_some(editor.read(cx).workspace(), |this, _workspace| {
1130                        this.child(
1131                            IconButton::new("review", IconName::ListTodo)
1132                                .icon_size(IconSize::Small)
1133                                .tooltip(Tooltip::for_action_title_in(
1134                                    "Review All Files",
1135                                    &OpenAgentDiff,
1136                                    &editor_focus_handle,
1137                                ))
1138                                .on_click({
1139                                    cx.listener(move |this, _, window, cx| {
1140                                        this.dispatch_action(&OpenAgentDiff, window, cx);
1141                                    })
1142                                }),
1143                        )
1144                    })
1145                    .child(vertical_divider())
1146                    .on_action({
1147                        let editor = editor.clone();
1148                        move |_action: &OpenAgentDiff, window, cx| {
1149                            AgentDiff::global(cx).update(cx, |agent_diff, cx| {
1150                                agent_diff.deploy_pane_from_editor(&editor, window, cx);
1151                            });
1152                        }
1153                    })
1154                    .into_any()
1155            }
1156            AgentDiffToolbarItem::Pane(agent_diff) => {
1157                let Some(agent_diff) = agent_diff.upgrade() else {
1158                    return Empty.into_any();
1159                };
1160
1161                let has_pending_edit_tool_use =
1162                    agent_diff.read(cx).thread.has_pending_edit_tool_uses(cx);
1163
1164                if has_pending_edit_tool_use {
1165                    return div().px_2().child(spinner_icon).into_any();
1166                }
1167
1168                let is_empty = agent_diff.read(cx).multibuffer.read(cx).is_empty();
1169                if is_empty {
1170                    return Empty.into_any();
1171                }
1172
1173                let focus_handle = agent_diff.focus_handle(cx);
1174
1175                h_group_xl()
1176                    .my_neg_1()
1177                    .py_1()
1178                    .items_center()
1179                    .flex_wrap()
1180                    .child(
1181                        h_group_sm()
1182                            .child(
1183                                Button::new("reject-all", "Reject All")
1184                                    .key_binding({
1185                                        KeyBinding::for_action_in(&RejectAll, &focus_handle, cx)
1186                                            .map(|kb| kb.size(rems_from_px(12.)))
1187                                    })
1188                                    .on_click(cx.listener(|this, _, window, cx| {
1189                                        this.dispatch_action(&RejectAll, window, cx)
1190                                    })),
1191                            )
1192                            .child(
1193                                Button::new("keep-all", "Keep All")
1194                                    .key_binding({
1195                                        KeyBinding::for_action_in(&KeepAll, &focus_handle, cx)
1196                                            .map(|kb| kb.size(rems_from_px(12.)))
1197                                    })
1198                                    .on_click(cx.listener(|this, _, window, cx| {
1199                                        this.dispatch_action(&KeepAll, window, cx)
1200                                    })),
1201                            ),
1202                    )
1203                    .into_any()
1204            }
1205        }
1206    }
1207}
1208
1209#[derive(Default)]
1210pub struct AgentDiff {
1211    reviewing_editors: HashMap<WeakEntity<Editor>, EditorState>,
1212    workspace_threads: HashMap<WeakEntity<Workspace>, WorkspaceThread>,
1213}
1214
1215#[derive(Clone, Debug, PartialEq, Eq)]
1216pub enum EditorState {
1217    Idle,
1218    Reviewing,
1219    Generating,
1220}
1221
1222struct WorkspaceThread {
1223    thread: WeakAgentDiffThread,
1224    _thread_subscriptions: (Subscription, Subscription),
1225    singleton_editors: HashMap<WeakEntity<Buffer>, HashMap<WeakEntity<Editor>, Subscription>>,
1226    _settings_subscription: Subscription,
1227    _workspace_subscription: Option<Subscription>,
1228}
1229
1230struct AgentDiffGlobal(Entity<AgentDiff>);
1231
1232impl Global for AgentDiffGlobal {}
1233
1234impl AgentDiff {
1235    fn global(cx: &mut App) -> Entity<Self> {
1236        cx.try_global::<AgentDiffGlobal>()
1237            .map(|global| global.0.clone())
1238            .unwrap_or_else(|| {
1239                let entity = cx.new(|_cx| Self::default());
1240                let global = AgentDiffGlobal(entity.clone());
1241                cx.set_global(global);
1242                entity
1243            })
1244    }
1245
1246    pub fn set_active_thread(
1247        workspace: &WeakEntity<Workspace>,
1248        thread: impl Into<AgentDiffThread>,
1249        window: &mut Window,
1250        cx: &mut App,
1251    ) {
1252        Self::global(cx).update(cx, |this, cx| {
1253            this.register_active_thread_impl(workspace, thread.into(), window, cx);
1254        });
1255    }
1256
1257    fn register_active_thread_impl(
1258        &mut self,
1259        workspace: &WeakEntity<Workspace>,
1260        thread: AgentDiffThread,
1261        window: &mut Window,
1262        cx: &mut Context<Self>,
1263    ) {
1264        let action_log = thread.action_log(cx);
1265
1266        let action_log_subscription = cx.observe_in(&action_log, window, {
1267            let workspace = workspace.clone();
1268            move |this, _action_log, window, cx| {
1269                this.update_reviewing_editors(&workspace, window, cx);
1270            }
1271        });
1272
1273        let thread_subscription = match &thread {
1274            AgentDiffThread::AcpThread(thread) => cx.subscribe_in(thread, window, {
1275                let workspace = workspace.clone();
1276                move |this, thread, event, window, cx| {
1277                    this.handle_acp_thread_event(&workspace, thread, event, window, cx)
1278                }
1279            }),
1280        };
1281
1282        if let Some(workspace_thread) = self.workspace_threads.get_mut(workspace) {
1283            // replace thread and action log subscription, but keep editors
1284            workspace_thread.thread = thread.downgrade();
1285            workspace_thread._thread_subscriptions = (action_log_subscription, thread_subscription);
1286            self.update_reviewing_editors(workspace, window, cx);
1287            return;
1288        }
1289
1290        let settings_subscription = cx.observe_global_in::<SettingsStore>(window, {
1291            let workspace = workspace.clone();
1292            let mut was_active = AgentSettings::get_global(cx).single_file_review;
1293            move |this, window, cx| {
1294                let is_active = AgentSettings::get_global(cx).single_file_review;
1295                if was_active != is_active {
1296                    was_active = is_active;
1297                    this.update_reviewing_editors(&workspace, window, cx);
1298                }
1299            }
1300        });
1301
1302        let workspace_subscription = workspace
1303            .upgrade()
1304            .map(|workspace| cx.subscribe_in(&workspace, window, Self::handle_workspace_event));
1305
1306        self.workspace_threads.insert(
1307            workspace.clone(),
1308            WorkspaceThread {
1309                thread: thread.downgrade(),
1310                _thread_subscriptions: (action_log_subscription, thread_subscription),
1311                singleton_editors: HashMap::default(),
1312                _settings_subscription: settings_subscription,
1313                _workspace_subscription: workspace_subscription,
1314            },
1315        );
1316
1317        let workspace = workspace.clone();
1318        cx.defer_in(window, move |this, window, cx| {
1319            if let Some(workspace) = workspace.upgrade() {
1320                this.register_workspace(workspace, window, cx);
1321            }
1322        });
1323    }
1324
1325    fn register_workspace(
1326        &mut self,
1327        workspace: Entity<Workspace>,
1328        window: &mut Window,
1329        cx: &mut Context<Self>,
1330    ) {
1331        let agent_diff = cx.entity();
1332
1333        let editors = workspace.update(cx, |workspace, cx| {
1334            let agent_diff = agent_diff.clone();
1335
1336            Self::register_review_action::<Keep>(workspace, Self::keep, &agent_diff);
1337            Self::register_review_action::<Reject>(workspace, Self::reject, &agent_diff);
1338            Self::register_review_action::<KeepAll>(workspace, Self::keep_all, &agent_diff);
1339            Self::register_review_action::<RejectAll>(workspace, Self::reject_all, &agent_diff);
1340
1341            workspace.items_of_type(cx).collect::<Vec<_>>()
1342        });
1343
1344        let weak_workspace = workspace.downgrade();
1345
1346        for editor in editors {
1347            if let Some(buffer) = Self::full_editor_buffer(editor.read(cx), cx) {
1348                self.register_editor(weak_workspace.clone(), buffer, editor, window, cx);
1349            };
1350        }
1351
1352        self.update_reviewing_editors(&weak_workspace, window, cx);
1353    }
1354
1355    fn register_review_action<T: Action>(
1356        workspace: &mut Workspace,
1357        review: impl Fn(&Entity<Editor>, &AgentDiffThread, &mut Window, &mut App) -> PostReviewState
1358        + 'static,
1359        this: &Entity<AgentDiff>,
1360    ) {
1361        let this = this.clone();
1362        workspace.register_action(move |workspace, _: &T, window, cx| {
1363            let review = &review;
1364            let task = this.update(cx, |this, cx| {
1365                this.review_in_active_editor(workspace, review, window, cx)
1366            });
1367
1368            if let Some(task) = task {
1369                task.detach_and_log_err(cx);
1370            } else {
1371                cx.propagate();
1372            }
1373        });
1374    }
1375
1376    fn handle_acp_thread_event(
1377        &mut self,
1378        workspace: &WeakEntity<Workspace>,
1379        thread: &Entity<AcpThread>,
1380        event: &AcpThreadEvent,
1381        window: &mut Window,
1382        cx: &mut Context<Self>,
1383    ) {
1384        match event {
1385            AcpThreadEvent::NewEntry => {
1386                if thread
1387                    .read(cx)
1388                    .entries()
1389                    .last()
1390                    .is_some_and(|entry| entry.diffs().next().is_some())
1391                {
1392                    self.update_reviewing_editors(workspace, window, cx);
1393                }
1394            }
1395            AcpThreadEvent::EntryUpdated(ix) => {
1396                if thread
1397                    .read(cx)
1398                    .entries()
1399                    .get(*ix)
1400                    .is_some_and(|entry| entry.diffs().next().is_some())
1401                {
1402                    self.update_reviewing_editors(workspace, window, cx);
1403                }
1404            }
1405            AcpThreadEvent::Stopped
1406            | AcpThreadEvent::Error
1407            | AcpThreadEvent::LoadError(_)
1408            | AcpThreadEvent::Refusal => {
1409                self.update_reviewing_editors(workspace, window, cx);
1410            }
1411            AcpThreadEvent::TitleUpdated
1412            | AcpThreadEvent::TokenUsageUpdated
1413            | AcpThreadEvent::EntriesRemoved(_)
1414            | AcpThreadEvent::ToolAuthorizationRequired
1415            | AcpThreadEvent::PromptCapabilitiesUpdated
1416            | AcpThreadEvent::AvailableCommandsUpdated(_)
1417            | AcpThreadEvent::Retry(_)
1418            | AcpThreadEvent::ModeUpdated(_) => {}
1419        }
1420    }
1421
1422    fn handle_workspace_event(
1423        &mut self,
1424        workspace: &Entity<Workspace>,
1425        event: &workspace::Event,
1426        window: &mut Window,
1427        cx: &mut Context<Self>,
1428    ) {
1429        if let workspace::Event::ItemAdded { item } = event
1430            && let Some(editor) = item.downcast::<Editor>()
1431            && let Some(buffer) = Self::full_editor_buffer(editor.read(cx), cx)
1432        {
1433            self.register_editor(workspace.downgrade(), buffer, editor, window, cx);
1434        }
1435    }
1436
1437    fn full_editor_buffer(editor: &Editor, cx: &App) -> Option<WeakEntity<Buffer>> {
1438        if editor.mode().is_full() {
1439            editor
1440                .buffer()
1441                .read(cx)
1442                .as_singleton()
1443                .map(|buffer| buffer.downgrade())
1444        } else {
1445            None
1446        }
1447    }
1448
1449    fn register_editor(
1450        &mut self,
1451        workspace: WeakEntity<Workspace>,
1452        buffer: WeakEntity<Buffer>,
1453        editor: Entity<Editor>,
1454        window: &mut Window,
1455        cx: &mut Context<Self>,
1456    ) {
1457        let Some(workspace_thread) = self.workspace_threads.get_mut(&workspace) else {
1458            return;
1459        };
1460
1461        let weak_editor = editor.downgrade();
1462
1463        workspace_thread
1464            .singleton_editors
1465            .entry(buffer.clone())
1466            .or_default()
1467            .entry(weak_editor.clone())
1468            .or_insert_with(|| {
1469                let workspace = workspace.clone();
1470                cx.observe_release(&editor, move |this, _, _cx| {
1471                    let Some(active_thread) = this.workspace_threads.get_mut(&workspace) else {
1472                        return;
1473                    };
1474
1475                    if let Entry::Occupied(mut entry) =
1476                        active_thread.singleton_editors.entry(buffer)
1477                    {
1478                        let set = entry.get_mut();
1479                        set.remove(&weak_editor);
1480
1481                        if set.is_empty() {
1482                            entry.remove();
1483                        }
1484                    }
1485                })
1486            });
1487
1488        self.update_reviewing_editors(&workspace, window, cx);
1489    }
1490
1491    fn update_reviewing_editors(
1492        &mut self,
1493        workspace: &WeakEntity<Workspace>,
1494        window: &mut Window,
1495        cx: &mut Context<Self>,
1496    ) {
1497        if !AgentSettings::get_global(cx).single_file_review {
1498            for (editor, _) in self.reviewing_editors.drain() {
1499                editor
1500                    .update(cx, |editor, cx| {
1501                        editor.end_temporary_diff_override(cx);
1502                        editor.unregister_addon::<EditorAgentDiffAddon>();
1503                    })
1504                    .ok();
1505            }
1506            return;
1507        }
1508
1509        let Some(workspace_thread) = self.workspace_threads.get_mut(workspace) else {
1510            return;
1511        };
1512
1513        let Some(thread) = workspace_thread.thread.upgrade() else {
1514            return;
1515        };
1516
1517        let action_log = thread.action_log(cx);
1518        let changed_buffers = action_log.read(cx).changed_buffers(cx);
1519
1520        let mut unaffected = self.reviewing_editors.clone();
1521
1522        for (buffer, diff_handle) in changed_buffers {
1523            if buffer.read(cx).file().is_none() {
1524                continue;
1525            }
1526
1527            let Some(buffer_editors) = workspace_thread.singleton_editors.get(&buffer.downgrade())
1528            else {
1529                continue;
1530            };
1531
1532            for weak_editor in buffer_editors.keys() {
1533                let Some(editor) = weak_editor.upgrade() else {
1534                    continue;
1535                };
1536
1537                let multibuffer = editor.read(cx).buffer().clone();
1538                multibuffer.update(cx, |multibuffer, cx| {
1539                    multibuffer.add_diff(diff_handle.clone(), cx);
1540                });
1541
1542                let new_state = if thread.is_generating(cx) {
1543                    EditorState::Generating
1544                } else {
1545                    EditorState::Reviewing
1546                };
1547
1548                let previous_state = self
1549                    .reviewing_editors
1550                    .insert(weak_editor.clone(), new_state.clone());
1551
1552                if previous_state.is_none() {
1553                    editor.update(cx, |editor, cx| {
1554                        editor.start_temporary_diff_override();
1555                        editor.set_render_diff_hunk_controls(diff_hunk_controls(&thread), cx);
1556                        editor.set_expand_all_diff_hunks(cx);
1557                        editor.register_addon(EditorAgentDiffAddon);
1558                    });
1559                } else {
1560                    unaffected.remove(weak_editor);
1561                }
1562
1563                if new_state == EditorState::Reviewing && previous_state != Some(new_state) {
1564                    // Jump to first hunk when we enter review mode
1565                    editor.update(cx, |editor, cx| {
1566                        let snapshot = multibuffer.read(cx).snapshot(cx);
1567                        if let Some(first_hunk) = snapshot.diff_hunks().next() {
1568                            let first_hunk_start = first_hunk.multi_buffer_range().start;
1569
1570                            editor.change_selections(
1571                                SelectionEffects::scroll(Autoscroll::center()),
1572                                window,
1573                                cx,
1574                                |selections| {
1575                                    selections.select_ranges([first_hunk_start..first_hunk_start])
1576                                },
1577                            );
1578                        }
1579                    });
1580                }
1581            }
1582        }
1583
1584        // Remove editors from this workspace that are no longer under review
1585        for (editor, _) in unaffected {
1586            // Note: We could avoid this check by storing `reviewing_editors` by Workspace,
1587            // but that would add another lookup in `AgentDiff::editor_state`
1588            // which gets called much more frequently.
1589            let in_workspace = editor
1590                .read_with(cx, |editor, _cx| editor.workspace())
1591                .ok()
1592                .flatten()
1593                .is_some_and(|editor_workspace| {
1594                    editor_workspace.entity_id() == workspace.entity_id()
1595                });
1596
1597            if in_workspace {
1598                editor
1599                    .update(cx, |editor, cx| {
1600                        editor.end_temporary_diff_override(cx);
1601                        editor.unregister_addon::<EditorAgentDiffAddon>();
1602                    })
1603                    .ok();
1604                self.reviewing_editors.remove(&editor);
1605            }
1606        }
1607
1608        cx.notify();
1609    }
1610
1611    fn editor_state(&self, editor: &WeakEntity<Editor>) -> EditorState {
1612        self.reviewing_editors
1613            .get(editor)
1614            .cloned()
1615            .unwrap_or(EditorState::Idle)
1616    }
1617
1618    fn deploy_pane_from_editor(&self, editor: &Entity<Editor>, window: &mut Window, cx: &mut App) {
1619        let Some(workspace) = editor.read(cx).workspace() else {
1620            return;
1621        };
1622
1623        let Some(WorkspaceThread { thread, .. }) =
1624            self.workspace_threads.get(&workspace.downgrade())
1625        else {
1626            return;
1627        };
1628
1629        let Some(thread) = thread.upgrade() else {
1630            return;
1631        };
1632
1633        AgentDiffPane::deploy(thread, workspace.downgrade(), window, cx).log_err();
1634    }
1635
1636    fn keep_all(
1637        editor: &Entity<Editor>,
1638        thread: &AgentDiffThread,
1639        window: &mut Window,
1640        cx: &mut App,
1641    ) -> PostReviewState {
1642        editor.update(cx, |editor, cx| {
1643            let snapshot = editor.buffer().read(cx).snapshot(cx);
1644            keep_edits_in_ranges(
1645                editor,
1646                &snapshot,
1647                thread,
1648                vec![editor::Anchor::min()..editor::Anchor::max()],
1649                window,
1650                cx,
1651            );
1652        });
1653        PostReviewState::AllReviewed
1654    }
1655
1656    fn reject_all(
1657        editor: &Entity<Editor>,
1658        thread: &AgentDiffThread,
1659        window: &mut Window,
1660        cx: &mut App,
1661    ) -> PostReviewState {
1662        editor.update(cx, |editor, cx| {
1663            let snapshot = editor.buffer().read(cx).snapshot(cx);
1664            reject_edits_in_ranges(
1665                editor,
1666                &snapshot,
1667                thread,
1668                vec![editor::Anchor::min()..editor::Anchor::max()],
1669                window,
1670                cx,
1671            );
1672        });
1673        PostReviewState::AllReviewed
1674    }
1675
1676    fn keep(
1677        editor: &Entity<Editor>,
1678        thread: &AgentDiffThread,
1679        window: &mut Window,
1680        cx: &mut App,
1681    ) -> PostReviewState {
1682        editor.update(cx, |editor, cx| {
1683            let snapshot = editor.buffer().read(cx).snapshot(cx);
1684            keep_edits_in_selection(editor, &snapshot, thread, window, cx);
1685            Self::post_review_state(&snapshot)
1686        })
1687    }
1688
1689    fn reject(
1690        editor: &Entity<Editor>,
1691        thread: &AgentDiffThread,
1692        window: &mut Window,
1693        cx: &mut App,
1694    ) -> PostReviewState {
1695        editor.update(cx, |editor, cx| {
1696            let snapshot = editor.buffer().read(cx).snapshot(cx);
1697            reject_edits_in_selection(editor, &snapshot, thread, window, cx);
1698            Self::post_review_state(&snapshot)
1699        })
1700    }
1701
1702    fn post_review_state(snapshot: &MultiBufferSnapshot) -> PostReviewState {
1703        for (i, _) in snapshot.diff_hunks().enumerate() {
1704            if i > 0 {
1705                return PostReviewState::Pending;
1706            }
1707        }
1708        PostReviewState::AllReviewed
1709    }
1710
1711    fn review_in_active_editor(
1712        &mut self,
1713        workspace: &mut Workspace,
1714        review: impl Fn(&Entity<Editor>, &AgentDiffThread, &mut Window, &mut App) -> PostReviewState,
1715        window: &mut Window,
1716        cx: &mut Context<Self>,
1717    ) -> Option<Task<Result<()>>> {
1718        let active_item = workspace.active_item(cx)?;
1719        let editor = active_item.act_as::<Editor>(cx)?;
1720
1721        if !matches!(
1722            self.editor_state(&editor.downgrade()),
1723            EditorState::Reviewing
1724        ) {
1725            return None;
1726        }
1727
1728        let WorkspaceThread { thread, .. } =
1729            self.workspace_threads.get(&workspace.weak_handle())?;
1730
1731        let thread = thread.upgrade()?;
1732
1733        if let PostReviewState::AllReviewed = review(&editor, &thread, window, cx)
1734            && let Some(curr_buffer) = editor.read(cx).buffer().read(cx).as_singleton()
1735        {
1736            let changed_buffers = thread.action_log(cx).read(cx).changed_buffers(cx);
1737
1738            let mut keys = changed_buffers.keys().cycle();
1739            keys.find(|k| *k == &curr_buffer);
1740            let next_project_path = keys
1741                .next()
1742                .filter(|k| *k != &curr_buffer)
1743                .and_then(|after| after.read(cx).project_path(cx));
1744
1745            if let Some(path) = next_project_path {
1746                let task = workspace.open_path(path, None, true, window, cx);
1747                let task = cx.spawn(async move |_, _cx| task.await.map(|_| ()));
1748                return Some(task);
1749            }
1750        }
1751
1752        Some(Task::ready(Ok(())))
1753    }
1754}
1755
1756enum PostReviewState {
1757    AllReviewed,
1758    Pending,
1759}
1760
1761pub struct EditorAgentDiffAddon;
1762
1763impl editor::Addon for EditorAgentDiffAddon {
1764    fn to_any(&self) -> &dyn std::any::Any {
1765        self
1766    }
1767
1768    fn extend_key_context(&self, key_context: &mut gpui::KeyContext, _: &App) {
1769        key_context.add("agent_diff");
1770        key_context.add("editor_agent_diff");
1771    }
1772}
1773
1774#[cfg(test)]
1775mod tests {
1776    use super::*;
1777    use crate::Keep;
1778    use acp_thread::AgentConnection as _;
1779    use agent_settings::AgentSettings;
1780    use editor::EditorSettings;
1781    use gpui::{TestAppContext, UpdateGlobal, VisualTestContext};
1782    use project::{FakeFs, Project};
1783    use serde_json::json;
1784    use settings::{Settings, SettingsStore};
1785    use std::{path::Path, rc::Rc};
1786    use util::path;
1787
1788    #[gpui::test]
1789    async fn test_multibuffer_agent_diff(cx: &mut TestAppContext) {
1790        cx.update(|cx| {
1791            let settings_store = SettingsStore::test(cx);
1792            cx.set_global(settings_store);
1793            language::init(cx);
1794            Project::init_settings(cx);
1795            AgentSettings::register(cx);
1796            prompt_store::init(cx);
1797            workspace::init_settings(cx);
1798            theme::init(theme::LoadThemes::JustBase, cx);
1799            EditorSettings::register(cx);
1800            language_model::init_settings(cx);
1801        });
1802
1803        let fs = FakeFs::new(cx.executor());
1804        fs.insert_tree(
1805            path!("/test"),
1806            json!({"file1": "abc\ndef\nghi\njkl\nmno\npqr\nstu\nvwx\nyz"}),
1807        )
1808        .await;
1809        let project = Project::test(fs, [path!("/test").as_ref()], cx).await;
1810        let buffer_path = project
1811            .read_with(cx, |project, cx| {
1812                project.find_project_path("test/file1", cx)
1813            })
1814            .unwrap();
1815
1816        let connection = Rc::new(acp_thread::StubAgentConnection::new());
1817        let thread = cx
1818            .update(|cx| {
1819                connection
1820                    .clone()
1821                    .new_thread(project.clone(), Path::new(path!("/test")), cx)
1822            })
1823            .await
1824            .unwrap();
1825
1826        let thread = AgentDiffThread::AcpThread(thread);
1827        let action_log = cx.read(|cx| thread.action_log(cx));
1828
1829        let (workspace, cx) =
1830            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1831        let agent_diff = cx.new_window_entity(|window, cx| {
1832            AgentDiffPane::new(thread.clone(), workspace.downgrade(), window, cx)
1833        });
1834        let editor = agent_diff.read_with(cx, |diff, _cx| diff.editor.clone());
1835
1836        let buffer = project
1837            .update(cx, |project, cx| project.open_buffer(buffer_path, cx))
1838            .await
1839            .unwrap();
1840        cx.update(|_, cx| {
1841            action_log.update(cx, |log, cx| log.buffer_read(buffer.clone(), cx));
1842            buffer.update(cx, |buffer, cx| {
1843                buffer
1844                    .edit(
1845                        [
1846                            (Point::new(1, 1)..Point::new(1, 2), "E"),
1847                            (Point::new(3, 2)..Point::new(3, 3), "L"),
1848                            (Point::new(5, 0)..Point::new(5, 1), "P"),
1849                            (Point::new(7, 1)..Point::new(7, 2), "W"),
1850                        ],
1851                        None,
1852                        cx,
1853                    )
1854                    .unwrap()
1855            });
1856            action_log.update(cx, |log, cx| log.buffer_edited(buffer.clone(), cx));
1857        });
1858        cx.run_until_parked();
1859
1860        // When opening the assistant diff, the cursor is positioned on the first hunk.
1861        assert_eq!(
1862            editor.read_with(cx, |editor, cx| editor.text(cx)),
1863            "abc\ndef\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
1864        );
1865        assert_eq!(
1866            editor
1867                .update(cx, |editor, cx| editor
1868                    .selections
1869                    .newest::<Point>(&editor.display_snapshot(cx)))
1870                .range(),
1871            Point::new(1, 0)..Point::new(1, 0)
1872        );
1873
1874        // After keeping a hunk, the cursor should be positioned on the second hunk.
1875        agent_diff.update_in(cx, |diff, window, cx| diff.keep(&Keep, window, cx));
1876        cx.run_until_parked();
1877        assert_eq!(
1878            editor.read_with(cx, |editor, cx| editor.text(cx)),
1879            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
1880        );
1881        assert_eq!(
1882            editor
1883                .update(cx, |editor, cx| editor
1884                    .selections
1885                    .newest::<Point>(&editor.display_snapshot(cx)))
1886                .range(),
1887            Point::new(3, 0)..Point::new(3, 0)
1888        );
1889
1890        // Rejecting a hunk also moves the cursor to the next hunk, possibly cycling if it's at the end.
1891        editor.update_in(cx, |editor, window, cx| {
1892            editor.change_selections(SelectionEffects::no_scroll(), window, cx, |selections| {
1893                selections.select_ranges([Point::new(10, 0)..Point::new(10, 0)])
1894            });
1895        });
1896        agent_diff.update_in(cx, |diff, window, cx| {
1897            diff.reject(&crate::Reject, window, cx)
1898        });
1899        cx.run_until_parked();
1900        assert_eq!(
1901            editor.read_with(cx, |editor, cx| editor.text(cx)),
1902            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nyz"
1903        );
1904        assert_eq!(
1905            editor
1906                .update(cx, |editor, cx| editor
1907                    .selections
1908                    .newest::<Point>(&editor.display_snapshot(cx)))
1909                .range(),
1910            Point::new(3, 0)..Point::new(3, 0)
1911        );
1912
1913        // Keeping a range that doesn't intersect the current selection doesn't move it.
1914        agent_diff.update_in(cx, |_diff, window, cx| {
1915            let position = editor
1916                .read(cx)
1917                .buffer()
1918                .read(cx)
1919                .read(cx)
1920                .anchor_before(Point::new(7, 0));
1921            editor.update(cx, |editor, cx| {
1922                let snapshot = editor.buffer().read(cx).snapshot(cx);
1923                keep_edits_in_ranges(
1924                    editor,
1925                    &snapshot,
1926                    &thread,
1927                    vec![position..position],
1928                    window,
1929                    cx,
1930                )
1931            });
1932        });
1933        cx.run_until_parked();
1934        assert_eq!(
1935            editor.read_with(cx, |editor, cx| editor.text(cx)),
1936            "abc\ndEf\nghi\njkl\njkL\nmno\nPqr\nstu\nvwx\nyz"
1937        );
1938        assert_eq!(
1939            editor
1940                .update(cx, |editor, cx| editor
1941                    .selections
1942                    .newest::<Point>(&editor.display_snapshot(cx)))
1943                .range(),
1944            Point::new(3, 0)..Point::new(3, 0)
1945        );
1946    }
1947
1948    #[gpui::test]
1949    async fn test_singleton_agent_diff(cx: &mut TestAppContext) {
1950        cx.update(|cx| {
1951            let settings_store = SettingsStore::test(cx);
1952            cx.set_global(settings_store);
1953            language::init(cx);
1954            Project::init_settings(cx);
1955            AgentSettings::register(cx);
1956            prompt_store::init(cx);
1957            workspace::init_settings(cx);
1958            theme::init(theme::LoadThemes::JustBase, cx);
1959            EditorSettings::register(cx);
1960            language_model::init_settings(cx);
1961            workspace::register_project_item::<Editor>(cx);
1962        });
1963
1964        let fs = FakeFs::new(cx.executor());
1965        fs.insert_tree(
1966            path!("/test"),
1967            json!({"file1": "abc\ndef\nghi\njkl\nmno\npqr\nstu\nvwx\nyz"}),
1968        )
1969        .await;
1970        fs.insert_tree(path!("/test"), json!({"file2": "abc\ndef\nghi"}))
1971            .await;
1972
1973        let project = Project::test(fs, [path!("/test").as_ref()], cx).await;
1974        let buffer_path1 = project
1975            .read_with(cx, |project, cx| {
1976                project.find_project_path("test/file1", cx)
1977            })
1978            .unwrap();
1979        let buffer_path2 = project
1980            .read_with(cx, |project, cx| {
1981                project.find_project_path("test/file2", cx)
1982            })
1983            .unwrap();
1984
1985        let (workspace, cx) =
1986            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1987
1988        // Add the diff toolbar to the active pane
1989        let diff_toolbar = cx.new_window_entity(|_, cx| AgentDiffToolbar::new(cx));
1990
1991        workspace.update_in(cx, {
1992            let diff_toolbar = diff_toolbar.clone();
1993
1994            move |workspace, window, cx| {
1995                workspace.active_pane().update(cx, |pane, cx| {
1996                    pane.toolbar().update(cx, |toolbar, cx| {
1997                        toolbar.add_item(diff_toolbar, window, cx);
1998                    });
1999                })
2000            }
2001        });
2002
2003        let connection = Rc::new(acp_thread::StubAgentConnection::new());
2004        let thread = cx
2005            .update(|_, cx| {
2006                connection
2007                    .clone()
2008                    .new_thread(project.clone(), Path::new(path!("/test")), cx)
2009            })
2010            .await
2011            .unwrap();
2012        let action_log = thread.read_with(cx, |thread, _| thread.action_log().clone());
2013
2014        // Set the active thread
2015        let thread = AgentDiffThread::AcpThread(thread);
2016        cx.update(|window, cx| {
2017            AgentDiff::set_active_thread(&workspace.downgrade(), thread.clone(), window, cx)
2018        });
2019
2020        let buffer1 = project
2021            .update(cx, |project, cx| {
2022                project.open_buffer(buffer_path1.clone(), cx)
2023            })
2024            .await
2025            .unwrap();
2026        let buffer2 = project
2027            .update(cx, |project, cx| {
2028                project.open_buffer(buffer_path2.clone(), cx)
2029            })
2030            .await
2031            .unwrap();
2032
2033        // Open an editor for buffer1
2034        let editor1 = cx.new_window_entity(|window, cx| {
2035            Editor::for_buffer(buffer1.clone(), Some(project.clone()), window, cx)
2036        });
2037
2038        workspace.update_in(cx, |workspace, window, cx| {
2039            workspace.add_item_to_active_pane(Box::new(editor1.clone()), None, true, window, cx);
2040        });
2041        cx.run_until_parked();
2042
2043        // Toolbar knows about the current editor, but it's hidden since there are no changes yet
2044        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2045            toolbar.active_item,
2046            Some(AgentDiffToolbarItem::Editor {
2047                state: EditorState::Idle,
2048                ..
2049            })
2050        )));
2051        assert_eq!(
2052            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2053            ToolbarItemLocation::Hidden
2054        );
2055
2056        // Make changes
2057        cx.update(|_, cx| {
2058            action_log.update(cx, |log, cx| log.buffer_read(buffer1.clone(), cx));
2059            buffer1.update(cx, |buffer, cx| {
2060                buffer
2061                    .edit(
2062                        [
2063                            (Point::new(1, 1)..Point::new(1, 2), "E"),
2064                            (Point::new(3, 2)..Point::new(3, 3), "L"),
2065                            (Point::new(5, 0)..Point::new(5, 1), "P"),
2066                            (Point::new(7, 1)..Point::new(7, 2), "W"),
2067                        ],
2068                        None,
2069                        cx,
2070                    )
2071                    .unwrap()
2072            });
2073            action_log.update(cx, |log, cx| log.buffer_edited(buffer1.clone(), cx));
2074
2075            action_log.update(cx, |log, cx| log.buffer_read(buffer2.clone(), cx));
2076            buffer2.update(cx, |buffer, cx| {
2077                buffer
2078                    .edit(
2079                        [
2080                            (Point::new(0, 0)..Point::new(0, 1), "A"),
2081                            (Point::new(2, 1)..Point::new(2, 2), "H"),
2082                        ],
2083                        None,
2084                        cx,
2085                    )
2086                    .unwrap();
2087            });
2088            action_log.update(cx, |log, cx| log.buffer_edited(buffer2.clone(), cx));
2089        });
2090        cx.run_until_parked();
2091
2092        // The already opened editor displays the diff and the cursor is at the first hunk
2093        assert_eq!(
2094            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2095            "abc\ndef\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
2096        );
2097        assert_eq!(
2098            editor1
2099                .update(cx, |editor, cx| editor
2100                    .selections
2101                    .newest::<Point>(&editor.display_snapshot(cx)))
2102                .range(),
2103            Point::new(1, 0)..Point::new(1, 0)
2104        );
2105
2106        // The toolbar is displayed in the right state
2107        assert_eq!(
2108            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2109            ToolbarItemLocation::PrimaryRight
2110        );
2111        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2112            toolbar.active_item,
2113            Some(AgentDiffToolbarItem::Editor {
2114                state: EditorState::Reviewing,
2115                ..
2116            })
2117        )));
2118
2119        // The toolbar respects its setting
2120        override_toolbar_agent_review_setting(false, cx);
2121        assert_eq!(
2122            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2123            ToolbarItemLocation::Hidden
2124        );
2125        override_toolbar_agent_review_setting(true, cx);
2126        assert_eq!(
2127            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2128            ToolbarItemLocation::PrimaryRight
2129        );
2130
2131        // After keeping a hunk, the cursor should be positioned on the second hunk.
2132        workspace.update(cx, |_, cx| {
2133            cx.dispatch_action(&Keep);
2134        });
2135        cx.run_until_parked();
2136        assert_eq!(
2137            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2138            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
2139        );
2140        assert_eq!(
2141            editor1
2142                .update(cx, |editor, cx| editor
2143                    .selections
2144                    .newest::<Point>(&editor.display_snapshot(cx)))
2145                .range(),
2146            Point::new(3, 0)..Point::new(3, 0)
2147        );
2148
2149        // Rejecting a hunk also moves the cursor to the next hunk, possibly cycling if it's at the end.
2150        editor1.update_in(cx, |editor, window, cx| {
2151            editor.change_selections(SelectionEffects::no_scroll(), window, cx, |selections| {
2152                selections.select_ranges([Point::new(10, 0)..Point::new(10, 0)])
2153            });
2154        });
2155        workspace.update(cx, |_, cx| {
2156            cx.dispatch_action(&Reject);
2157        });
2158        cx.run_until_parked();
2159        assert_eq!(
2160            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2161            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nyz"
2162        );
2163        assert_eq!(
2164            editor1
2165                .update(cx, |editor, cx| editor
2166                    .selections
2167                    .newest::<Point>(&editor.display_snapshot(cx)))
2168                .range(),
2169            Point::new(3, 0)..Point::new(3, 0)
2170        );
2171
2172        // Keeping a range that doesn't intersect the current selection doesn't move it.
2173        editor1.update_in(cx, |editor, window, cx| {
2174            let buffer = editor.buffer().read(cx);
2175            let position = buffer.read(cx).anchor_before(Point::new(7, 0));
2176            let snapshot = buffer.snapshot(cx);
2177            keep_edits_in_ranges(
2178                editor,
2179                &snapshot,
2180                &thread,
2181                vec![position..position],
2182                window,
2183                cx,
2184            )
2185        });
2186        cx.run_until_parked();
2187        assert_eq!(
2188            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2189            "abc\ndEf\nghi\njkl\njkL\nmno\nPqr\nstu\nvwx\nyz"
2190        );
2191        assert_eq!(
2192            editor1
2193                .update(cx, |editor, cx| editor
2194                    .selections
2195                    .newest::<Point>(&editor.display_snapshot(cx)))
2196                .range(),
2197            Point::new(3, 0)..Point::new(3, 0)
2198        );
2199
2200        // Reviewing the last change opens the next changed buffer
2201        workspace
2202            .update_in(cx, |workspace, window, cx| {
2203                AgentDiff::global(cx).update(cx, |agent_diff, cx| {
2204                    agent_diff.review_in_active_editor(workspace, AgentDiff::keep, window, cx)
2205                })
2206            })
2207            .unwrap()
2208            .await
2209            .unwrap();
2210
2211        cx.run_until_parked();
2212
2213        let editor2 = workspace.update(cx, |workspace, cx| {
2214            workspace.active_item_as::<Editor>(cx).unwrap()
2215        });
2216
2217        let editor2_path = editor2
2218            .read_with(cx, |editor, cx| editor.project_path(cx))
2219            .unwrap();
2220        assert_eq!(editor2_path, buffer_path2);
2221
2222        assert_eq!(
2223            editor2.read_with(cx, |editor, cx| editor.text(cx)),
2224            "abc\nAbc\ndef\nghi\ngHi"
2225        );
2226        assert_eq!(
2227            editor2
2228                .update(cx, |editor, cx| editor
2229                    .selections
2230                    .newest::<Point>(&editor.display_snapshot(cx)))
2231                .range(),
2232            Point::new(0, 0)..Point::new(0, 0)
2233        );
2234
2235        // Editor 1 toolbar is hidden since all changes have been reviewed
2236        workspace.update_in(cx, |workspace, window, cx| {
2237            workspace.activate_item(&editor1, true, true, window, cx)
2238        });
2239
2240        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2241            toolbar.active_item,
2242            Some(AgentDiffToolbarItem::Editor {
2243                state: EditorState::Idle,
2244                ..
2245            })
2246        )));
2247        assert_eq!(
2248            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2249            ToolbarItemLocation::Hidden
2250        );
2251    }
2252
2253    fn override_toolbar_agent_review_setting(active: bool, cx: &mut VisualTestContext) {
2254        cx.update(|_window, cx| {
2255            SettingsStore::update_global(cx, |store, _cx| {
2256                let mut editor_settings = store.get::<EditorSettings>(None).clone();
2257                editor_settings.toolbar.agent_review = active;
2258                store.override_global(editor_settings);
2259            })
2260        });
2261        cx.run_until_parked();
2262    }
2263}