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    ) -> Task<Option<Entity<Self>>>
 585    where
 586        Self: Sized,
 587    {
 588        Task::ready(Some(cx.new(|cx| {
 589            Self::new(self.thread.clone(), self.workspace.clone(), window, cx)
 590        })))
 591    }
 592
 593    fn is_dirty(&self, cx: &App) -> bool {
 594        self.multibuffer.read(cx).is_dirty(cx)
 595    }
 596
 597    fn has_conflict(&self, cx: &App) -> bool {
 598        self.multibuffer.read(cx).has_conflict(cx)
 599    }
 600
 601    fn can_save(&self, _: &App) -> bool {
 602        true
 603    }
 604
 605    fn save(
 606        &mut self,
 607        options: SaveOptions,
 608        project: Entity<Project>,
 609        window: &mut Window,
 610        cx: &mut Context<Self>,
 611    ) -> Task<Result<()>> {
 612        self.editor.save(options, project, window, cx)
 613    }
 614
 615    fn save_as(
 616        &mut self,
 617        _: Entity<Project>,
 618        _: ProjectPath,
 619        _window: &mut Window,
 620        _: &mut Context<Self>,
 621    ) -> Task<Result<()>> {
 622        unreachable!()
 623    }
 624
 625    fn reload(
 626        &mut self,
 627        project: Entity<Project>,
 628        window: &mut Window,
 629        cx: &mut Context<Self>,
 630    ) -> Task<Result<()>> {
 631        self.editor.reload(project, window, cx)
 632    }
 633
 634    fn act_as_type<'a>(
 635        &'a self,
 636        type_id: TypeId,
 637        self_handle: &'a Entity<Self>,
 638        _: &'a App,
 639    ) -> Option<AnyView> {
 640        if type_id == TypeId::of::<Self>() {
 641            Some(self_handle.to_any())
 642        } else if type_id == TypeId::of::<Editor>() {
 643            Some(self.editor.to_any())
 644        } else {
 645            None
 646        }
 647    }
 648
 649    fn breadcrumb_location(&self, _: &App) -> ToolbarItemLocation {
 650        ToolbarItemLocation::PrimaryLeft
 651    }
 652
 653    fn breadcrumbs(&self, theme: &theme::Theme, cx: &App) -> Option<Vec<BreadcrumbText>> {
 654        self.editor.breadcrumbs(theme, cx)
 655    }
 656
 657    fn added_to_workspace(
 658        &mut self,
 659        workspace: &mut Workspace,
 660        window: &mut Window,
 661        cx: &mut Context<Self>,
 662    ) {
 663        self.editor.update(cx, |editor, cx| {
 664            editor.added_to_workspace(workspace, window, cx)
 665        });
 666    }
 667
 668    fn tab_content_text(&self, _detail: usize, _cx: &App) -> SharedString {
 669        "Agent Diff".into()
 670    }
 671}
 672
 673impl Render for AgentDiffPane {
 674    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
 675        let is_empty = self.multibuffer.read(cx).is_empty();
 676        let focus_handle = &self.focus_handle;
 677
 678        div()
 679            .track_focus(focus_handle)
 680            .key_context(if is_empty { "EmptyPane" } else { "AgentDiff" })
 681            .on_action(cx.listener(Self::keep))
 682            .on_action(cx.listener(Self::reject))
 683            .on_action(cx.listener(Self::reject_all))
 684            .on_action(cx.listener(Self::keep_all))
 685            .bg(cx.theme().colors().editor_background)
 686            .flex()
 687            .items_center()
 688            .justify_center()
 689            .size_full()
 690            .when(is_empty, |el| {
 691                el.child(
 692                    v_flex()
 693                        .items_center()
 694                        .gap_2()
 695                        .child("No changes to review")
 696                        .child(
 697                            Button::new("continue-iterating", "Continue Iterating")
 698                                .style(ButtonStyle::Filled)
 699                                .icon(IconName::ForwardArrow)
 700                                .icon_position(IconPosition::Start)
 701                                .icon_size(IconSize::Small)
 702                                .icon_color(Color::Muted)
 703                                .full_width()
 704                                .key_binding(KeyBinding::for_action_in(
 705                                    &ToggleFocus,
 706                                    &focus_handle.clone(),
 707                                    cx,
 708                                ))
 709                                .on_click(|_event, window, cx| {
 710                                    window.dispatch_action(ToggleFocus.boxed_clone(), cx)
 711                                }),
 712                        ),
 713                )
 714            })
 715            .when(!is_empty, |el| el.child(self.editor.clone()))
 716    }
 717}
 718
 719fn diff_hunk_controls(thread: &AgentDiffThread) -> editor::RenderDiffHunkControlsFn {
 720    let thread = thread.clone();
 721
 722    Arc::new(
 723        move |row, status, hunk_range, is_created_file, line_height, editor, _, cx| {
 724            {
 725                render_diff_hunk_controls(
 726                    row,
 727                    status,
 728                    hunk_range,
 729                    is_created_file,
 730                    line_height,
 731                    &thread,
 732                    editor,
 733                    cx,
 734                )
 735            }
 736        },
 737    )
 738}
 739
 740fn render_diff_hunk_controls(
 741    row: u32,
 742    _status: &DiffHunkStatus,
 743    hunk_range: Range<editor::Anchor>,
 744    is_created_file: bool,
 745    line_height: Pixels,
 746    thread: &AgentDiffThread,
 747    editor: &Entity<Editor>,
 748    cx: &mut App,
 749) -> AnyElement {
 750    let editor = editor.clone();
 751
 752    h_flex()
 753        .h(line_height)
 754        .mr_0p5()
 755        .gap_1()
 756        .px_0p5()
 757        .pb_1()
 758        .border_x_1()
 759        .border_b_1()
 760        .border_color(cx.theme().colors().border)
 761        .rounded_b_md()
 762        .bg(cx.theme().colors().editor_background)
 763        .gap_1()
 764        .block_mouse_except_scroll()
 765        .shadow_md()
 766        .children(vec![
 767            Button::new(("reject", row as u64), "Reject")
 768                .disabled(is_created_file)
 769                .key_binding(
 770                    KeyBinding::for_action_in(&Reject, &editor.read(cx).focus_handle(cx), cx)
 771                        .map(|kb| kb.size(rems_from_px(12.))),
 772                )
 773                .on_click({
 774                    let editor = editor.clone();
 775                    let thread = thread.clone();
 776                    move |_event, window, cx| {
 777                        editor.update(cx, |editor, cx| {
 778                            let snapshot = editor.buffer().read(cx).snapshot(cx);
 779                            reject_edits_in_ranges(
 780                                editor,
 781                                &snapshot,
 782                                &thread,
 783                                vec![hunk_range.start..hunk_range.start],
 784                                window,
 785                                cx,
 786                            );
 787                        })
 788                    }
 789                }),
 790            Button::new(("keep", row as u64), "Keep")
 791                .key_binding(
 792                    KeyBinding::for_action_in(&Keep, &editor.read(cx).focus_handle(cx), cx)
 793                        .map(|kb| kb.size(rems_from_px(12.))),
 794                )
 795                .on_click({
 796                    let editor = editor.clone();
 797                    let thread = thread.clone();
 798                    move |_event, window, cx| {
 799                        editor.update(cx, |editor, cx| {
 800                            let snapshot = editor.buffer().read(cx).snapshot(cx);
 801                            keep_edits_in_ranges(
 802                                editor,
 803                                &snapshot,
 804                                &thread,
 805                                vec![hunk_range.start..hunk_range.start],
 806                                window,
 807                                cx,
 808                            );
 809                        });
 810                    }
 811                }),
 812        ])
 813        .when(
 814            !editor.read(cx).buffer().read(cx).all_diff_hunks_expanded(),
 815            |el| {
 816                el.child(
 817                    IconButton::new(("next-hunk", row as u64), IconName::ArrowDown)
 818                        .shape(IconButtonShape::Square)
 819                        .icon_size(IconSize::Small)
 820                        // .disabled(!has_multiple_hunks)
 821                        .tooltip({
 822                            let focus_handle = editor.focus_handle(cx);
 823                            move |_window, cx| {
 824                                Tooltip::for_action_in("Next Hunk", &GoToHunk, &focus_handle, cx)
 825                            }
 826                        })
 827                        .on_click({
 828                            let editor = editor.clone();
 829                            move |_event, window, cx| {
 830                                editor.update(cx, |editor, cx| {
 831                                    let snapshot = editor.snapshot(window, cx);
 832                                    let position =
 833                                        hunk_range.end.to_point(&snapshot.buffer_snapshot());
 834                                    editor.go_to_hunk_before_or_after_position(
 835                                        &snapshot,
 836                                        position,
 837                                        Direction::Next,
 838                                        window,
 839                                        cx,
 840                                    );
 841                                    editor.expand_selected_diff_hunks(cx);
 842                                });
 843                            }
 844                        }),
 845                )
 846                .child(
 847                    IconButton::new(("prev-hunk", row as u64), IconName::ArrowUp)
 848                        .shape(IconButtonShape::Square)
 849                        .icon_size(IconSize::Small)
 850                        // .disabled(!has_multiple_hunks)
 851                        .tooltip({
 852                            let focus_handle = editor.focus_handle(cx);
 853                            move |_window, cx| {
 854                                Tooltip::for_action_in(
 855                                    "Previous Hunk",
 856                                    &GoToPreviousHunk,
 857                                    &focus_handle,
 858                                    cx,
 859                                )
 860                            }
 861                        })
 862                        .on_click({
 863                            let editor = editor.clone();
 864                            move |_event, window, cx| {
 865                                editor.update(cx, |editor, cx| {
 866                                    let snapshot = editor.snapshot(window, cx);
 867                                    let point =
 868                                        hunk_range.start.to_point(&snapshot.buffer_snapshot());
 869                                    editor.go_to_hunk_before_or_after_position(
 870                                        &snapshot,
 871                                        point,
 872                                        Direction::Prev,
 873                                        window,
 874                                        cx,
 875                                    );
 876                                    editor.expand_selected_diff_hunks(cx);
 877                                });
 878                            }
 879                        }),
 880                )
 881            },
 882        )
 883        .into_any_element()
 884}
 885
 886struct AgentDiffAddon;
 887
 888impl editor::Addon for AgentDiffAddon {
 889    fn to_any(&self) -> &dyn std::any::Any {
 890        self
 891    }
 892
 893    fn extend_key_context(&self, key_context: &mut gpui::KeyContext, _: &App) {
 894        key_context.add("agent_diff");
 895    }
 896}
 897
 898pub struct AgentDiffToolbar {
 899    active_item: Option<AgentDiffToolbarItem>,
 900    _settings_subscription: Subscription,
 901}
 902
 903pub enum AgentDiffToolbarItem {
 904    Pane(WeakEntity<AgentDiffPane>),
 905    Editor {
 906        editor: WeakEntity<Editor>,
 907        state: EditorState,
 908        _diff_subscription: Subscription,
 909    },
 910}
 911
 912impl AgentDiffToolbar {
 913    pub fn new(cx: &mut Context<Self>) -> Self {
 914        Self {
 915            active_item: None,
 916            _settings_subscription: cx.observe_global::<SettingsStore>(Self::update_location),
 917        }
 918    }
 919
 920    fn dispatch_action(&self, action: &dyn Action, window: &mut Window, cx: &mut Context<Self>) {
 921        let Some(active_item) = self.active_item.as_ref() else {
 922            return;
 923        };
 924
 925        match active_item {
 926            AgentDiffToolbarItem::Pane(agent_diff) => {
 927                if let Some(agent_diff) = agent_diff.upgrade() {
 928                    agent_diff.focus_handle(cx).focus(window);
 929                }
 930            }
 931            AgentDiffToolbarItem::Editor { editor, .. } => {
 932                if let Some(editor) = editor.upgrade() {
 933                    editor.read(cx).focus_handle(cx).focus(window);
 934                }
 935            }
 936        }
 937
 938        let action = action.boxed_clone();
 939        cx.defer(move |cx| {
 940            cx.dispatch_action(action.as_ref());
 941        })
 942    }
 943
 944    fn handle_diff_notify(&mut self, agent_diff: Entity<AgentDiff>, cx: &mut Context<Self>) {
 945        let Some(AgentDiffToolbarItem::Editor { editor, state, .. }) = self.active_item.as_mut()
 946        else {
 947            return;
 948        };
 949
 950        *state = agent_diff.read(cx).editor_state(editor);
 951        self.update_location(cx);
 952        cx.notify();
 953    }
 954
 955    fn update_location(&mut self, cx: &mut Context<Self>) {
 956        let location = self.location(cx);
 957        cx.emit(ToolbarItemEvent::ChangeLocation(location));
 958    }
 959
 960    fn location(&self, cx: &App) -> ToolbarItemLocation {
 961        if !EditorSettings::get_global(cx).toolbar.agent_review {
 962            return ToolbarItemLocation::Hidden;
 963        }
 964
 965        match &self.active_item {
 966            None => ToolbarItemLocation::Hidden,
 967            Some(AgentDiffToolbarItem::Pane(_)) => ToolbarItemLocation::PrimaryRight,
 968            Some(AgentDiffToolbarItem::Editor { state, .. }) => match state {
 969                EditorState::Generating | EditorState::Reviewing => {
 970                    ToolbarItemLocation::PrimaryRight
 971                }
 972                EditorState::Idle => ToolbarItemLocation::Hidden,
 973            },
 974        }
 975    }
 976}
 977
 978impl EventEmitter<ToolbarItemEvent> for AgentDiffToolbar {}
 979
 980impl ToolbarItemView for AgentDiffToolbar {
 981    fn set_active_pane_item(
 982        &mut self,
 983        active_pane_item: Option<&dyn ItemHandle>,
 984        _: &mut Window,
 985        cx: &mut Context<Self>,
 986    ) -> ToolbarItemLocation {
 987        if let Some(item) = active_pane_item {
 988            if let Some(pane) = item.act_as::<AgentDiffPane>(cx) {
 989                self.active_item = Some(AgentDiffToolbarItem::Pane(pane.downgrade()));
 990                return self.location(cx);
 991            }
 992
 993            if let Some(editor) = item.act_as::<Editor>(cx)
 994                && editor.read(cx).mode().is_full()
 995            {
 996                let agent_diff = AgentDiff::global(cx);
 997
 998                self.active_item = Some(AgentDiffToolbarItem::Editor {
 999                    editor: editor.downgrade(),
1000                    state: agent_diff.read(cx).editor_state(&editor.downgrade()),
1001                    _diff_subscription: cx.observe(&agent_diff, Self::handle_diff_notify),
1002                });
1003
1004                return self.location(cx);
1005            }
1006        }
1007
1008        self.active_item = None;
1009        self.location(cx)
1010    }
1011
1012    fn pane_focus_update(
1013        &mut self,
1014        _pane_focused: bool,
1015        _window: &mut Window,
1016        _cx: &mut Context<Self>,
1017    ) {
1018    }
1019}
1020
1021impl Render for AgentDiffToolbar {
1022    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
1023        let spinner_icon = div()
1024            .px_0p5()
1025            .id("generating")
1026            .tooltip(Tooltip::text("Generating Changes…"))
1027            .child(
1028                Icon::new(IconName::LoadCircle)
1029                    .size(IconSize::Small)
1030                    .color(Color::Accent)
1031                    .with_rotate_animation(3),
1032            )
1033            .into_any();
1034
1035        let Some(active_item) = self.active_item.as_ref() else {
1036            return Empty.into_any();
1037        };
1038
1039        match active_item {
1040            AgentDiffToolbarItem::Editor { editor, state, .. } => {
1041                let Some(editor) = editor.upgrade() else {
1042                    return Empty.into_any();
1043                };
1044
1045                let editor_focus_handle = editor.read(cx).focus_handle(cx);
1046
1047                let content = match state {
1048                    EditorState::Idle => return Empty.into_any(),
1049                    EditorState::Generating => vec![spinner_icon],
1050                    EditorState::Reviewing => vec![
1051                        h_flex()
1052                            .child(
1053                                IconButton::new("hunk-up", IconName::ArrowUp)
1054                                    .icon_size(IconSize::Small)
1055                                    .tooltip(Tooltip::for_action_title_in(
1056                                        "Previous Hunk",
1057                                        &GoToPreviousHunk,
1058                                        &editor_focus_handle,
1059                                    ))
1060                                    .on_click({
1061                                        let editor_focus_handle = editor_focus_handle.clone();
1062                                        move |_, window, cx| {
1063                                            editor_focus_handle.dispatch_action(
1064                                                &GoToPreviousHunk,
1065                                                window,
1066                                                cx,
1067                                            );
1068                                        }
1069                                    }),
1070                            )
1071                            .child(
1072                                IconButton::new("hunk-down", IconName::ArrowDown)
1073                                    .icon_size(IconSize::Small)
1074                                    .tooltip(Tooltip::for_action_title_in(
1075                                        "Next Hunk",
1076                                        &GoToHunk,
1077                                        &editor_focus_handle,
1078                                    ))
1079                                    .on_click({
1080                                        let editor_focus_handle = editor_focus_handle.clone();
1081                                        move |_, window, cx| {
1082                                            editor_focus_handle
1083                                                .dispatch_action(&GoToHunk, window, cx);
1084                                        }
1085                                    }),
1086                            )
1087                            .into_any_element(),
1088                        vertical_divider().into_any_element(),
1089                        h_flex()
1090                            .gap_0p5()
1091                            .child(
1092                                Button::new("reject-all", "Reject All")
1093                                    .key_binding({
1094                                        KeyBinding::for_action_in(
1095                                            &RejectAll,
1096                                            &editor_focus_handle,
1097                                            cx,
1098                                        )
1099                                        .map(|kb| kb.size(rems_from_px(12.)))
1100                                    })
1101                                    .on_click(cx.listener(|this, _, window, cx| {
1102                                        this.dispatch_action(&RejectAll, window, cx)
1103                                    })),
1104                            )
1105                            .child(
1106                                Button::new("keep-all", "Keep All")
1107                                    .key_binding({
1108                                        KeyBinding::for_action_in(
1109                                            &KeepAll,
1110                                            &editor_focus_handle,
1111                                            cx,
1112                                        )
1113                                        .map(|kb| kb.size(rems_from_px(12.)))
1114                                    })
1115                                    .on_click(cx.listener(|this, _, window, cx| {
1116                                        this.dispatch_action(&KeepAll, window, cx)
1117                                    })),
1118                            )
1119                            .into_any_element(),
1120                    ],
1121                };
1122
1123                h_flex()
1124                    .track_focus(&editor_focus_handle)
1125                    .size_full()
1126                    .px_1()
1127                    .mr_1()
1128                    .gap_1()
1129                    .children(content)
1130                    .child(vertical_divider())
1131                    .when_some(editor.read(cx).workspace(), |this, _workspace| {
1132                        this.child(
1133                            IconButton::new("review", IconName::ListTodo)
1134                                .icon_size(IconSize::Small)
1135                                .tooltip(Tooltip::for_action_title_in(
1136                                    "Review All Files",
1137                                    &OpenAgentDiff,
1138                                    &editor_focus_handle,
1139                                ))
1140                                .on_click({
1141                                    cx.listener(move |this, _, window, cx| {
1142                                        this.dispatch_action(&OpenAgentDiff, window, cx);
1143                                    })
1144                                }),
1145                        )
1146                    })
1147                    .child(vertical_divider())
1148                    .on_action({
1149                        let editor = editor.clone();
1150                        move |_action: &OpenAgentDiff, window, cx| {
1151                            AgentDiff::global(cx).update(cx, |agent_diff, cx| {
1152                                agent_diff.deploy_pane_from_editor(&editor, window, cx);
1153                            });
1154                        }
1155                    })
1156                    .into_any()
1157            }
1158            AgentDiffToolbarItem::Pane(agent_diff) => {
1159                let Some(agent_diff) = agent_diff.upgrade() else {
1160                    return Empty.into_any();
1161                };
1162
1163                let has_pending_edit_tool_use =
1164                    agent_diff.read(cx).thread.has_pending_edit_tool_uses(cx);
1165
1166                if has_pending_edit_tool_use {
1167                    return div().px_2().child(spinner_icon).into_any();
1168                }
1169
1170                let is_empty = agent_diff.read(cx).multibuffer.read(cx).is_empty();
1171                if is_empty {
1172                    return Empty.into_any();
1173                }
1174
1175                let focus_handle = agent_diff.focus_handle(cx);
1176
1177                h_group_xl()
1178                    .my_neg_1()
1179                    .py_1()
1180                    .items_center()
1181                    .flex_wrap()
1182                    .child(
1183                        h_group_sm()
1184                            .child(
1185                                Button::new("reject-all", "Reject All")
1186                                    .key_binding({
1187                                        KeyBinding::for_action_in(&RejectAll, &focus_handle, cx)
1188                                            .map(|kb| kb.size(rems_from_px(12.)))
1189                                    })
1190                                    .on_click(cx.listener(|this, _, window, cx| {
1191                                        this.dispatch_action(&RejectAll, window, cx)
1192                                    })),
1193                            )
1194                            .child(
1195                                Button::new("keep-all", "Keep All")
1196                                    .key_binding({
1197                                        KeyBinding::for_action_in(&KeepAll, &focus_handle, cx)
1198                                            .map(|kb| kb.size(rems_from_px(12.)))
1199                                    })
1200                                    .on_click(cx.listener(|this, _, window, cx| {
1201                                        this.dispatch_action(&KeepAll, window, cx)
1202                                    })),
1203                            ),
1204                    )
1205                    .into_any()
1206            }
1207        }
1208    }
1209}
1210
1211#[derive(Default)]
1212pub struct AgentDiff {
1213    reviewing_editors: HashMap<WeakEntity<Editor>, EditorState>,
1214    workspace_threads: HashMap<WeakEntity<Workspace>, WorkspaceThread>,
1215}
1216
1217#[derive(Clone, Debug, PartialEq, Eq)]
1218pub enum EditorState {
1219    Idle,
1220    Reviewing,
1221    Generating,
1222}
1223
1224struct WorkspaceThread {
1225    thread: WeakAgentDiffThread,
1226    _thread_subscriptions: (Subscription, Subscription),
1227    singleton_editors: HashMap<WeakEntity<Buffer>, HashMap<WeakEntity<Editor>, Subscription>>,
1228    _settings_subscription: Subscription,
1229    _workspace_subscription: Option<Subscription>,
1230}
1231
1232struct AgentDiffGlobal(Entity<AgentDiff>);
1233
1234impl Global for AgentDiffGlobal {}
1235
1236impl AgentDiff {
1237    fn global(cx: &mut App) -> Entity<Self> {
1238        cx.try_global::<AgentDiffGlobal>()
1239            .map(|global| global.0.clone())
1240            .unwrap_or_else(|| {
1241                let entity = cx.new(|_cx| Self::default());
1242                let global = AgentDiffGlobal(entity.clone());
1243                cx.set_global(global);
1244                entity
1245            })
1246    }
1247
1248    pub fn set_active_thread(
1249        workspace: &WeakEntity<Workspace>,
1250        thread: impl Into<AgentDiffThread>,
1251        window: &mut Window,
1252        cx: &mut App,
1253    ) {
1254        Self::global(cx).update(cx, |this, cx| {
1255            this.register_active_thread_impl(workspace, thread.into(), window, cx);
1256        });
1257    }
1258
1259    fn register_active_thread_impl(
1260        &mut self,
1261        workspace: &WeakEntity<Workspace>,
1262        thread: AgentDiffThread,
1263        window: &mut Window,
1264        cx: &mut Context<Self>,
1265    ) {
1266        let action_log = thread.action_log(cx);
1267
1268        let action_log_subscription = cx.observe_in(&action_log, window, {
1269            let workspace = workspace.clone();
1270            move |this, _action_log, window, cx| {
1271                this.update_reviewing_editors(&workspace, window, cx);
1272            }
1273        });
1274
1275        let thread_subscription = match &thread {
1276            AgentDiffThread::AcpThread(thread) => cx.subscribe_in(thread, window, {
1277                let workspace = workspace.clone();
1278                move |this, thread, event, window, cx| {
1279                    this.handle_acp_thread_event(&workspace, thread, event, window, cx)
1280                }
1281            }),
1282        };
1283
1284        if let Some(workspace_thread) = self.workspace_threads.get_mut(workspace) {
1285            // replace thread and action log subscription, but keep editors
1286            workspace_thread.thread = thread.downgrade();
1287            workspace_thread._thread_subscriptions = (action_log_subscription, thread_subscription);
1288            self.update_reviewing_editors(workspace, window, cx);
1289            return;
1290        }
1291
1292        let settings_subscription = cx.observe_global_in::<SettingsStore>(window, {
1293            let workspace = workspace.clone();
1294            let mut was_active = AgentSettings::get_global(cx).single_file_review;
1295            move |this, window, cx| {
1296                let is_active = AgentSettings::get_global(cx).single_file_review;
1297                if was_active != is_active {
1298                    was_active = is_active;
1299                    this.update_reviewing_editors(&workspace, window, cx);
1300                }
1301            }
1302        });
1303
1304        let workspace_subscription = workspace
1305            .upgrade()
1306            .map(|workspace| cx.subscribe_in(&workspace, window, Self::handle_workspace_event));
1307
1308        self.workspace_threads.insert(
1309            workspace.clone(),
1310            WorkspaceThread {
1311                thread: thread.downgrade(),
1312                _thread_subscriptions: (action_log_subscription, thread_subscription),
1313                singleton_editors: HashMap::default(),
1314                _settings_subscription: settings_subscription,
1315                _workspace_subscription: workspace_subscription,
1316            },
1317        );
1318
1319        let workspace = workspace.clone();
1320        cx.defer_in(window, move |this, window, cx| {
1321            if let Some(workspace) = workspace.upgrade() {
1322                this.register_workspace(workspace, window, cx);
1323            }
1324        });
1325    }
1326
1327    fn register_workspace(
1328        &mut self,
1329        workspace: Entity<Workspace>,
1330        window: &mut Window,
1331        cx: &mut Context<Self>,
1332    ) {
1333        let agent_diff = cx.entity();
1334
1335        let editors = workspace.update(cx, |workspace, cx| {
1336            let agent_diff = agent_diff.clone();
1337
1338            Self::register_review_action::<Keep>(workspace, Self::keep, &agent_diff);
1339            Self::register_review_action::<Reject>(workspace, Self::reject, &agent_diff);
1340            Self::register_review_action::<KeepAll>(workspace, Self::keep_all, &agent_diff);
1341            Self::register_review_action::<RejectAll>(workspace, Self::reject_all, &agent_diff);
1342
1343            workspace.items_of_type(cx).collect::<Vec<_>>()
1344        });
1345
1346        let weak_workspace = workspace.downgrade();
1347
1348        for editor in editors {
1349            if let Some(buffer) = Self::full_editor_buffer(editor.read(cx), cx) {
1350                self.register_editor(weak_workspace.clone(), buffer, editor, window, cx);
1351            };
1352        }
1353
1354        self.update_reviewing_editors(&weak_workspace, window, cx);
1355    }
1356
1357    fn register_review_action<T: Action>(
1358        workspace: &mut Workspace,
1359        review: impl Fn(&Entity<Editor>, &AgentDiffThread, &mut Window, &mut App) -> PostReviewState
1360        + 'static,
1361        this: &Entity<AgentDiff>,
1362    ) {
1363        let this = this.clone();
1364        workspace.register_action(move |workspace, _: &T, window, cx| {
1365            let review = &review;
1366            let task = this.update(cx, |this, cx| {
1367                this.review_in_active_editor(workspace, review, window, cx)
1368            });
1369
1370            if let Some(task) = task {
1371                task.detach_and_log_err(cx);
1372            } else {
1373                cx.propagate();
1374            }
1375        });
1376    }
1377
1378    fn handle_acp_thread_event(
1379        &mut self,
1380        workspace: &WeakEntity<Workspace>,
1381        thread: &Entity<AcpThread>,
1382        event: &AcpThreadEvent,
1383        window: &mut Window,
1384        cx: &mut Context<Self>,
1385    ) {
1386        match event {
1387            AcpThreadEvent::NewEntry => {
1388                if thread
1389                    .read(cx)
1390                    .entries()
1391                    .last()
1392                    .is_some_and(|entry| entry.diffs().next().is_some())
1393                {
1394                    self.update_reviewing_editors(workspace, window, cx);
1395                }
1396            }
1397            AcpThreadEvent::EntryUpdated(ix) => {
1398                if thread
1399                    .read(cx)
1400                    .entries()
1401                    .get(*ix)
1402                    .is_some_and(|entry| entry.diffs().next().is_some())
1403                {
1404                    self.update_reviewing_editors(workspace, window, cx);
1405                }
1406            }
1407            AcpThreadEvent::Stopped
1408            | AcpThreadEvent::Error
1409            | AcpThreadEvent::LoadError(_)
1410            | AcpThreadEvent::Refusal => {
1411                self.update_reviewing_editors(workspace, window, cx);
1412            }
1413            AcpThreadEvent::TitleUpdated
1414            | AcpThreadEvent::TokenUsageUpdated
1415            | AcpThreadEvent::EntriesRemoved(_)
1416            | AcpThreadEvent::ToolAuthorizationRequired
1417            | AcpThreadEvent::PromptCapabilitiesUpdated
1418            | AcpThreadEvent::AvailableCommandsUpdated(_)
1419            | AcpThreadEvent::Retry(_)
1420            | AcpThreadEvent::ModeUpdated(_) => {}
1421        }
1422    }
1423
1424    fn handle_workspace_event(
1425        &mut self,
1426        workspace: &Entity<Workspace>,
1427        event: &workspace::Event,
1428        window: &mut Window,
1429        cx: &mut Context<Self>,
1430    ) {
1431        if let workspace::Event::ItemAdded { item } = event
1432            && let Some(editor) = item.downcast::<Editor>()
1433            && let Some(buffer) = Self::full_editor_buffer(editor.read(cx), cx)
1434        {
1435            self.register_editor(workspace.downgrade(), buffer, editor, window, cx);
1436        }
1437    }
1438
1439    fn full_editor_buffer(editor: &Editor, cx: &App) -> Option<WeakEntity<Buffer>> {
1440        if editor.mode().is_full() {
1441            editor
1442                .buffer()
1443                .read(cx)
1444                .as_singleton()
1445                .map(|buffer| buffer.downgrade())
1446        } else {
1447            None
1448        }
1449    }
1450
1451    fn register_editor(
1452        &mut self,
1453        workspace: WeakEntity<Workspace>,
1454        buffer: WeakEntity<Buffer>,
1455        editor: Entity<Editor>,
1456        window: &mut Window,
1457        cx: &mut Context<Self>,
1458    ) {
1459        let Some(workspace_thread) = self.workspace_threads.get_mut(&workspace) else {
1460            return;
1461        };
1462
1463        let weak_editor = editor.downgrade();
1464
1465        workspace_thread
1466            .singleton_editors
1467            .entry(buffer.clone())
1468            .or_default()
1469            .entry(weak_editor.clone())
1470            .or_insert_with(|| {
1471                let workspace = workspace.clone();
1472                cx.observe_release(&editor, move |this, _, _cx| {
1473                    let Some(active_thread) = this.workspace_threads.get_mut(&workspace) else {
1474                        return;
1475                    };
1476
1477                    if let Entry::Occupied(mut entry) =
1478                        active_thread.singleton_editors.entry(buffer)
1479                    {
1480                        let set = entry.get_mut();
1481                        set.remove(&weak_editor);
1482
1483                        if set.is_empty() {
1484                            entry.remove();
1485                        }
1486                    }
1487                })
1488            });
1489
1490        self.update_reviewing_editors(&workspace, window, cx);
1491    }
1492
1493    fn update_reviewing_editors(
1494        &mut self,
1495        workspace: &WeakEntity<Workspace>,
1496        window: &mut Window,
1497        cx: &mut Context<Self>,
1498    ) {
1499        if !AgentSettings::get_global(cx).single_file_review {
1500            for (editor, _) in self.reviewing_editors.drain() {
1501                editor
1502                    .update(cx, |editor, cx| {
1503                        editor.end_temporary_diff_override(cx);
1504                        editor.unregister_addon::<EditorAgentDiffAddon>();
1505                    })
1506                    .ok();
1507            }
1508            return;
1509        }
1510
1511        let Some(workspace_thread) = self.workspace_threads.get_mut(workspace) else {
1512            return;
1513        };
1514
1515        let Some(thread) = workspace_thread.thread.upgrade() else {
1516            return;
1517        };
1518
1519        let action_log = thread.action_log(cx);
1520        let changed_buffers = action_log.read(cx).changed_buffers(cx);
1521
1522        let mut unaffected = self.reviewing_editors.clone();
1523
1524        for (buffer, diff_handle) in changed_buffers {
1525            if buffer.read(cx).file().is_none() {
1526                continue;
1527            }
1528
1529            let Some(buffer_editors) = workspace_thread.singleton_editors.get(&buffer.downgrade())
1530            else {
1531                continue;
1532            };
1533
1534            for weak_editor in buffer_editors.keys() {
1535                let Some(editor) = weak_editor.upgrade() else {
1536                    continue;
1537                };
1538
1539                let multibuffer = editor.read(cx).buffer().clone();
1540                multibuffer.update(cx, |multibuffer, cx| {
1541                    multibuffer.add_diff(diff_handle.clone(), cx);
1542                });
1543
1544                let new_state = if thread.is_generating(cx) {
1545                    EditorState::Generating
1546                } else {
1547                    EditorState::Reviewing
1548                };
1549
1550                let previous_state = self
1551                    .reviewing_editors
1552                    .insert(weak_editor.clone(), new_state.clone());
1553
1554                if previous_state.is_none() {
1555                    editor.update(cx, |editor, cx| {
1556                        editor.start_temporary_diff_override();
1557                        editor.set_render_diff_hunk_controls(diff_hunk_controls(&thread), cx);
1558                        editor.set_expand_all_diff_hunks(cx);
1559                        editor.register_addon(EditorAgentDiffAddon);
1560                    });
1561                } else {
1562                    unaffected.remove(weak_editor);
1563                }
1564
1565                if new_state == EditorState::Reviewing && previous_state != Some(new_state) {
1566                    // Jump to first hunk when we enter review mode
1567                    editor.update(cx, |editor, cx| {
1568                        let snapshot = multibuffer.read(cx).snapshot(cx);
1569                        if let Some(first_hunk) = snapshot.diff_hunks().next() {
1570                            let first_hunk_start = first_hunk.multi_buffer_range().start;
1571
1572                            editor.change_selections(
1573                                SelectionEffects::scroll(Autoscroll::center()),
1574                                window,
1575                                cx,
1576                                |selections| {
1577                                    selections.select_ranges([first_hunk_start..first_hunk_start])
1578                                },
1579                            );
1580                        }
1581                    });
1582                }
1583            }
1584        }
1585
1586        // Remove editors from this workspace that are no longer under review
1587        for (editor, _) in unaffected {
1588            // Note: We could avoid this check by storing `reviewing_editors` by Workspace,
1589            // but that would add another lookup in `AgentDiff::editor_state`
1590            // which gets called much more frequently.
1591            let in_workspace = editor
1592                .read_with(cx, |editor, _cx| editor.workspace())
1593                .ok()
1594                .flatten()
1595                .is_some_and(|editor_workspace| {
1596                    editor_workspace.entity_id() == workspace.entity_id()
1597                });
1598
1599            if in_workspace {
1600                editor
1601                    .update(cx, |editor, cx| {
1602                        editor.end_temporary_diff_override(cx);
1603                        editor.unregister_addon::<EditorAgentDiffAddon>();
1604                    })
1605                    .ok();
1606                self.reviewing_editors.remove(&editor);
1607            }
1608        }
1609
1610        cx.notify();
1611    }
1612
1613    fn editor_state(&self, editor: &WeakEntity<Editor>) -> EditorState {
1614        self.reviewing_editors
1615            .get(editor)
1616            .cloned()
1617            .unwrap_or(EditorState::Idle)
1618    }
1619
1620    fn deploy_pane_from_editor(&self, editor: &Entity<Editor>, window: &mut Window, cx: &mut App) {
1621        let Some(workspace) = editor.read(cx).workspace() else {
1622            return;
1623        };
1624
1625        let Some(WorkspaceThread { thread, .. }) =
1626            self.workspace_threads.get(&workspace.downgrade())
1627        else {
1628            return;
1629        };
1630
1631        let Some(thread) = thread.upgrade() else {
1632            return;
1633        };
1634
1635        AgentDiffPane::deploy(thread, workspace.downgrade(), window, cx).log_err();
1636    }
1637
1638    fn keep_all(
1639        editor: &Entity<Editor>,
1640        thread: &AgentDiffThread,
1641        window: &mut Window,
1642        cx: &mut App,
1643    ) -> PostReviewState {
1644        editor.update(cx, |editor, cx| {
1645            let snapshot = editor.buffer().read(cx).snapshot(cx);
1646            keep_edits_in_ranges(
1647                editor,
1648                &snapshot,
1649                thread,
1650                vec![editor::Anchor::min()..editor::Anchor::max()],
1651                window,
1652                cx,
1653            );
1654        });
1655        PostReviewState::AllReviewed
1656    }
1657
1658    fn reject_all(
1659        editor: &Entity<Editor>,
1660        thread: &AgentDiffThread,
1661        window: &mut Window,
1662        cx: &mut App,
1663    ) -> PostReviewState {
1664        editor.update(cx, |editor, cx| {
1665            let snapshot = editor.buffer().read(cx).snapshot(cx);
1666            reject_edits_in_ranges(
1667                editor,
1668                &snapshot,
1669                thread,
1670                vec![editor::Anchor::min()..editor::Anchor::max()],
1671                window,
1672                cx,
1673            );
1674        });
1675        PostReviewState::AllReviewed
1676    }
1677
1678    fn keep(
1679        editor: &Entity<Editor>,
1680        thread: &AgentDiffThread,
1681        window: &mut Window,
1682        cx: &mut App,
1683    ) -> PostReviewState {
1684        editor.update(cx, |editor, cx| {
1685            let snapshot = editor.buffer().read(cx).snapshot(cx);
1686            keep_edits_in_selection(editor, &snapshot, thread, window, cx);
1687            Self::post_review_state(&snapshot)
1688        })
1689    }
1690
1691    fn reject(
1692        editor: &Entity<Editor>,
1693        thread: &AgentDiffThread,
1694        window: &mut Window,
1695        cx: &mut App,
1696    ) -> PostReviewState {
1697        editor.update(cx, |editor, cx| {
1698            let snapshot = editor.buffer().read(cx).snapshot(cx);
1699            reject_edits_in_selection(editor, &snapshot, thread, window, cx);
1700            Self::post_review_state(&snapshot)
1701        })
1702    }
1703
1704    fn post_review_state(snapshot: &MultiBufferSnapshot) -> PostReviewState {
1705        for (i, _) in snapshot.diff_hunks().enumerate() {
1706            if i > 0 {
1707                return PostReviewState::Pending;
1708            }
1709        }
1710        PostReviewState::AllReviewed
1711    }
1712
1713    fn review_in_active_editor(
1714        &mut self,
1715        workspace: &mut Workspace,
1716        review: impl Fn(&Entity<Editor>, &AgentDiffThread, &mut Window, &mut App) -> PostReviewState,
1717        window: &mut Window,
1718        cx: &mut Context<Self>,
1719    ) -> Option<Task<Result<()>>> {
1720        let active_item = workspace.active_item(cx)?;
1721        let editor = active_item.act_as::<Editor>(cx)?;
1722
1723        if !matches!(
1724            self.editor_state(&editor.downgrade()),
1725            EditorState::Reviewing
1726        ) {
1727            return None;
1728        }
1729
1730        let WorkspaceThread { thread, .. } =
1731            self.workspace_threads.get(&workspace.weak_handle())?;
1732
1733        let thread = thread.upgrade()?;
1734
1735        if let PostReviewState::AllReviewed = review(&editor, &thread, window, cx)
1736            && let Some(curr_buffer) = editor.read(cx).buffer().read(cx).as_singleton()
1737        {
1738            let changed_buffers = thread.action_log(cx).read(cx).changed_buffers(cx);
1739
1740            let mut keys = changed_buffers.keys().cycle();
1741            keys.find(|k| *k == &curr_buffer);
1742            let next_project_path = keys
1743                .next()
1744                .filter(|k| *k != &curr_buffer)
1745                .and_then(|after| after.read(cx).project_path(cx));
1746
1747            if let Some(path) = next_project_path {
1748                let task = workspace.open_path(path, None, true, window, cx);
1749                let task = cx.spawn(async move |_, _cx| task.await.map(|_| ()));
1750                return Some(task);
1751            }
1752        }
1753
1754        Some(Task::ready(Ok(())))
1755    }
1756}
1757
1758enum PostReviewState {
1759    AllReviewed,
1760    Pending,
1761}
1762
1763pub struct EditorAgentDiffAddon;
1764
1765impl editor::Addon for EditorAgentDiffAddon {
1766    fn to_any(&self) -> &dyn std::any::Any {
1767        self
1768    }
1769
1770    fn extend_key_context(&self, key_context: &mut gpui::KeyContext, _: &App) {
1771        key_context.add("agent_diff");
1772        key_context.add("editor_agent_diff");
1773    }
1774}
1775
1776#[cfg(test)]
1777mod tests {
1778    use super::*;
1779    use crate::Keep;
1780    use acp_thread::AgentConnection as _;
1781    use agent_settings::AgentSettings;
1782    use editor::EditorSettings;
1783    use gpui::{TestAppContext, UpdateGlobal, VisualTestContext};
1784    use project::{FakeFs, Project};
1785    use serde_json::json;
1786    use settings::{Settings, SettingsStore};
1787    use std::{path::Path, rc::Rc};
1788    use util::path;
1789
1790    #[gpui::test]
1791    async fn test_multibuffer_agent_diff(cx: &mut TestAppContext) {
1792        cx.update(|cx| {
1793            let settings_store = SettingsStore::test(cx);
1794            cx.set_global(settings_store);
1795            language::init(cx);
1796            Project::init_settings(cx);
1797            AgentSettings::register(cx);
1798            prompt_store::init(cx);
1799            workspace::init_settings(cx);
1800            theme::init(theme::LoadThemes::JustBase, cx);
1801            EditorSettings::register(cx);
1802            language_model::init_settings(cx);
1803        });
1804
1805        let fs = FakeFs::new(cx.executor());
1806        fs.insert_tree(
1807            path!("/test"),
1808            json!({"file1": "abc\ndef\nghi\njkl\nmno\npqr\nstu\nvwx\nyz"}),
1809        )
1810        .await;
1811        let project = Project::test(fs, [path!("/test").as_ref()], cx).await;
1812        let buffer_path = project
1813            .read_with(cx, |project, cx| {
1814                project.find_project_path("test/file1", cx)
1815            })
1816            .unwrap();
1817
1818        let connection = Rc::new(acp_thread::StubAgentConnection::new());
1819        let thread = cx
1820            .update(|cx| {
1821                connection
1822                    .clone()
1823                    .new_thread(project.clone(), Path::new(path!("/test")), cx)
1824            })
1825            .await
1826            .unwrap();
1827
1828        let thread = AgentDiffThread::AcpThread(thread);
1829        let action_log = cx.read(|cx| thread.action_log(cx));
1830
1831        let (workspace, cx) =
1832            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1833        let agent_diff = cx.new_window_entity(|window, cx| {
1834            AgentDiffPane::new(thread.clone(), workspace.downgrade(), window, cx)
1835        });
1836        let editor = agent_diff.read_with(cx, |diff, _cx| diff.editor.clone());
1837
1838        let buffer = project
1839            .update(cx, |project, cx| project.open_buffer(buffer_path, cx))
1840            .await
1841            .unwrap();
1842        cx.update(|_, cx| {
1843            action_log.update(cx, |log, cx| log.buffer_read(buffer.clone(), cx));
1844            buffer.update(cx, |buffer, cx| {
1845                buffer
1846                    .edit(
1847                        [
1848                            (Point::new(1, 1)..Point::new(1, 2), "E"),
1849                            (Point::new(3, 2)..Point::new(3, 3), "L"),
1850                            (Point::new(5, 0)..Point::new(5, 1), "P"),
1851                            (Point::new(7, 1)..Point::new(7, 2), "W"),
1852                        ],
1853                        None,
1854                        cx,
1855                    )
1856                    .unwrap()
1857            });
1858            action_log.update(cx, |log, cx| log.buffer_edited(buffer.clone(), cx));
1859        });
1860        cx.run_until_parked();
1861
1862        // When opening the assistant diff, the cursor is positioned on the first hunk.
1863        assert_eq!(
1864            editor.read_with(cx, |editor, cx| editor.text(cx)),
1865            "abc\ndef\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
1866        );
1867        assert_eq!(
1868            editor
1869                .update(cx, |editor, cx| editor
1870                    .selections
1871                    .newest::<Point>(&editor.display_snapshot(cx)))
1872                .range(),
1873            Point::new(1, 0)..Point::new(1, 0)
1874        );
1875
1876        // After keeping a hunk, the cursor should be positioned on the second hunk.
1877        agent_diff.update_in(cx, |diff, window, cx| diff.keep(&Keep, window, cx));
1878        cx.run_until_parked();
1879        assert_eq!(
1880            editor.read_with(cx, |editor, cx| editor.text(cx)),
1881            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
1882        );
1883        assert_eq!(
1884            editor
1885                .update(cx, |editor, cx| editor
1886                    .selections
1887                    .newest::<Point>(&editor.display_snapshot(cx)))
1888                .range(),
1889            Point::new(3, 0)..Point::new(3, 0)
1890        );
1891
1892        // Rejecting a hunk also moves the cursor to the next hunk, possibly cycling if it's at the end.
1893        editor.update_in(cx, |editor, window, cx| {
1894            editor.change_selections(SelectionEffects::no_scroll(), window, cx, |selections| {
1895                selections.select_ranges([Point::new(10, 0)..Point::new(10, 0)])
1896            });
1897        });
1898        agent_diff.update_in(cx, |diff, window, cx| {
1899            diff.reject(&crate::Reject, window, cx)
1900        });
1901        cx.run_until_parked();
1902        assert_eq!(
1903            editor.read_with(cx, |editor, cx| editor.text(cx)),
1904            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nyz"
1905        );
1906        assert_eq!(
1907            editor
1908                .update(cx, |editor, cx| editor
1909                    .selections
1910                    .newest::<Point>(&editor.display_snapshot(cx)))
1911                .range(),
1912            Point::new(3, 0)..Point::new(3, 0)
1913        );
1914
1915        // Keeping a range that doesn't intersect the current selection doesn't move it.
1916        agent_diff.update_in(cx, |_diff, window, cx| {
1917            let position = editor
1918                .read(cx)
1919                .buffer()
1920                .read(cx)
1921                .read(cx)
1922                .anchor_before(Point::new(7, 0));
1923            editor.update(cx, |editor, cx| {
1924                let snapshot = editor.buffer().read(cx).snapshot(cx);
1925                keep_edits_in_ranges(
1926                    editor,
1927                    &snapshot,
1928                    &thread,
1929                    vec![position..position],
1930                    window,
1931                    cx,
1932                )
1933            });
1934        });
1935        cx.run_until_parked();
1936        assert_eq!(
1937            editor.read_with(cx, |editor, cx| editor.text(cx)),
1938            "abc\ndEf\nghi\njkl\njkL\nmno\nPqr\nstu\nvwx\nyz"
1939        );
1940        assert_eq!(
1941            editor
1942                .update(cx, |editor, cx| editor
1943                    .selections
1944                    .newest::<Point>(&editor.display_snapshot(cx)))
1945                .range(),
1946            Point::new(3, 0)..Point::new(3, 0)
1947        );
1948    }
1949
1950    #[gpui::test]
1951    async fn test_singleton_agent_diff(cx: &mut TestAppContext) {
1952        cx.update(|cx| {
1953            let settings_store = SettingsStore::test(cx);
1954            cx.set_global(settings_store);
1955            language::init(cx);
1956            Project::init_settings(cx);
1957            AgentSettings::register(cx);
1958            prompt_store::init(cx);
1959            workspace::init_settings(cx);
1960            theme::init(theme::LoadThemes::JustBase, cx);
1961            EditorSettings::register(cx);
1962            language_model::init_settings(cx);
1963            workspace::register_project_item::<Editor>(cx);
1964        });
1965
1966        let fs = FakeFs::new(cx.executor());
1967        fs.insert_tree(
1968            path!("/test"),
1969            json!({"file1": "abc\ndef\nghi\njkl\nmno\npqr\nstu\nvwx\nyz"}),
1970        )
1971        .await;
1972        fs.insert_tree(path!("/test"), json!({"file2": "abc\ndef\nghi"}))
1973            .await;
1974
1975        let project = Project::test(fs, [path!("/test").as_ref()], cx).await;
1976        let buffer_path1 = project
1977            .read_with(cx, |project, cx| {
1978                project.find_project_path("test/file1", cx)
1979            })
1980            .unwrap();
1981        let buffer_path2 = project
1982            .read_with(cx, |project, cx| {
1983                project.find_project_path("test/file2", cx)
1984            })
1985            .unwrap();
1986
1987        let (workspace, cx) =
1988            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1989
1990        // Add the diff toolbar to the active pane
1991        let diff_toolbar = cx.new_window_entity(|_, cx| AgentDiffToolbar::new(cx));
1992
1993        workspace.update_in(cx, {
1994            let diff_toolbar = diff_toolbar.clone();
1995
1996            move |workspace, window, cx| {
1997                workspace.active_pane().update(cx, |pane, cx| {
1998                    pane.toolbar().update(cx, |toolbar, cx| {
1999                        toolbar.add_item(diff_toolbar, window, cx);
2000                    });
2001                })
2002            }
2003        });
2004
2005        let connection = Rc::new(acp_thread::StubAgentConnection::new());
2006        let thread = cx
2007            .update(|_, cx| {
2008                connection
2009                    .clone()
2010                    .new_thread(project.clone(), Path::new(path!("/test")), cx)
2011            })
2012            .await
2013            .unwrap();
2014        let action_log = thread.read_with(cx, |thread, _| thread.action_log().clone());
2015
2016        // Set the active thread
2017        let thread = AgentDiffThread::AcpThread(thread);
2018        cx.update(|window, cx| {
2019            AgentDiff::set_active_thread(&workspace.downgrade(), thread.clone(), window, cx)
2020        });
2021
2022        let buffer1 = project
2023            .update(cx, |project, cx| {
2024                project.open_buffer(buffer_path1.clone(), cx)
2025            })
2026            .await
2027            .unwrap();
2028        let buffer2 = project
2029            .update(cx, |project, cx| {
2030                project.open_buffer(buffer_path2.clone(), cx)
2031            })
2032            .await
2033            .unwrap();
2034
2035        // Open an editor for buffer1
2036        let editor1 = cx.new_window_entity(|window, cx| {
2037            Editor::for_buffer(buffer1.clone(), Some(project.clone()), window, cx)
2038        });
2039
2040        workspace.update_in(cx, |workspace, window, cx| {
2041            workspace.add_item_to_active_pane(Box::new(editor1.clone()), None, true, window, cx);
2042        });
2043        cx.run_until_parked();
2044
2045        // Toolbar knows about the current editor, but it's hidden since there are no changes yet
2046        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2047            toolbar.active_item,
2048            Some(AgentDiffToolbarItem::Editor {
2049                state: EditorState::Idle,
2050                ..
2051            })
2052        )));
2053        assert_eq!(
2054            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2055            ToolbarItemLocation::Hidden
2056        );
2057
2058        // Make changes
2059        cx.update(|_, cx| {
2060            action_log.update(cx, |log, cx| log.buffer_read(buffer1.clone(), cx));
2061            buffer1.update(cx, |buffer, cx| {
2062                buffer
2063                    .edit(
2064                        [
2065                            (Point::new(1, 1)..Point::new(1, 2), "E"),
2066                            (Point::new(3, 2)..Point::new(3, 3), "L"),
2067                            (Point::new(5, 0)..Point::new(5, 1), "P"),
2068                            (Point::new(7, 1)..Point::new(7, 2), "W"),
2069                        ],
2070                        None,
2071                        cx,
2072                    )
2073                    .unwrap()
2074            });
2075            action_log.update(cx, |log, cx| log.buffer_edited(buffer1.clone(), cx));
2076
2077            action_log.update(cx, |log, cx| log.buffer_read(buffer2.clone(), cx));
2078            buffer2.update(cx, |buffer, cx| {
2079                buffer
2080                    .edit(
2081                        [
2082                            (Point::new(0, 0)..Point::new(0, 1), "A"),
2083                            (Point::new(2, 1)..Point::new(2, 2), "H"),
2084                        ],
2085                        None,
2086                        cx,
2087                    )
2088                    .unwrap();
2089            });
2090            action_log.update(cx, |log, cx| log.buffer_edited(buffer2.clone(), cx));
2091        });
2092        cx.run_until_parked();
2093
2094        // The already opened editor displays the diff and the cursor is at the first hunk
2095        assert_eq!(
2096            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2097            "abc\ndef\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
2098        );
2099        assert_eq!(
2100            editor1
2101                .update(cx, |editor, cx| editor
2102                    .selections
2103                    .newest::<Point>(&editor.display_snapshot(cx)))
2104                .range(),
2105            Point::new(1, 0)..Point::new(1, 0)
2106        );
2107
2108        // The toolbar is displayed in the right state
2109        assert_eq!(
2110            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2111            ToolbarItemLocation::PrimaryRight
2112        );
2113        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2114            toolbar.active_item,
2115            Some(AgentDiffToolbarItem::Editor {
2116                state: EditorState::Reviewing,
2117                ..
2118            })
2119        )));
2120
2121        // The toolbar respects its setting
2122        override_toolbar_agent_review_setting(false, cx);
2123        assert_eq!(
2124            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2125            ToolbarItemLocation::Hidden
2126        );
2127        override_toolbar_agent_review_setting(true, cx);
2128        assert_eq!(
2129            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2130            ToolbarItemLocation::PrimaryRight
2131        );
2132
2133        // After keeping a hunk, the cursor should be positioned on the second hunk.
2134        workspace.update(cx, |_, cx| {
2135            cx.dispatch_action(&Keep);
2136        });
2137        cx.run_until_parked();
2138        assert_eq!(
2139            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2140            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
2141        );
2142        assert_eq!(
2143            editor1
2144                .update(cx, |editor, cx| editor
2145                    .selections
2146                    .newest::<Point>(&editor.display_snapshot(cx)))
2147                .range(),
2148            Point::new(3, 0)..Point::new(3, 0)
2149        );
2150
2151        // Rejecting a hunk also moves the cursor to the next hunk, possibly cycling if it's at the end.
2152        editor1.update_in(cx, |editor, window, cx| {
2153            editor.change_selections(SelectionEffects::no_scroll(), window, cx, |selections| {
2154                selections.select_ranges([Point::new(10, 0)..Point::new(10, 0)])
2155            });
2156        });
2157        workspace.update(cx, |_, cx| {
2158            cx.dispatch_action(&Reject);
2159        });
2160        cx.run_until_parked();
2161        assert_eq!(
2162            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2163            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nyz"
2164        );
2165        assert_eq!(
2166            editor1
2167                .update(cx, |editor, cx| editor
2168                    .selections
2169                    .newest::<Point>(&editor.display_snapshot(cx)))
2170                .range(),
2171            Point::new(3, 0)..Point::new(3, 0)
2172        );
2173
2174        // Keeping a range that doesn't intersect the current selection doesn't move it.
2175        editor1.update_in(cx, |editor, window, cx| {
2176            let buffer = editor.buffer().read(cx);
2177            let position = buffer.read(cx).anchor_before(Point::new(7, 0));
2178            let snapshot = buffer.snapshot(cx);
2179            keep_edits_in_ranges(
2180                editor,
2181                &snapshot,
2182                &thread,
2183                vec![position..position],
2184                window,
2185                cx,
2186            )
2187        });
2188        cx.run_until_parked();
2189        assert_eq!(
2190            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2191            "abc\ndEf\nghi\njkl\njkL\nmno\nPqr\nstu\nvwx\nyz"
2192        );
2193        assert_eq!(
2194            editor1
2195                .update(cx, |editor, cx| editor
2196                    .selections
2197                    .newest::<Point>(&editor.display_snapshot(cx)))
2198                .range(),
2199            Point::new(3, 0)..Point::new(3, 0)
2200        );
2201
2202        // Reviewing the last change opens the next changed buffer
2203        workspace
2204            .update_in(cx, |workspace, window, cx| {
2205                AgentDiff::global(cx).update(cx, |agent_diff, cx| {
2206                    agent_diff.review_in_active_editor(workspace, AgentDiff::keep, window, cx)
2207                })
2208            })
2209            .unwrap()
2210            .await
2211            .unwrap();
2212
2213        cx.run_until_parked();
2214
2215        let editor2 = workspace.update(cx, |workspace, cx| {
2216            workspace.active_item_as::<Editor>(cx).unwrap()
2217        });
2218
2219        let editor2_path = editor2
2220            .read_with(cx, |editor, cx| editor.project_path(cx))
2221            .unwrap();
2222        assert_eq!(editor2_path, buffer_path2);
2223
2224        assert_eq!(
2225            editor2.read_with(cx, |editor, cx| editor.text(cx)),
2226            "abc\nAbc\ndef\nghi\ngHi"
2227        );
2228        assert_eq!(
2229            editor2
2230                .update(cx, |editor, cx| editor
2231                    .selections
2232                    .newest::<Point>(&editor.display_snapshot(cx)))
2233                .range(),
2234            Point::new(0, 0)..Point::new(0, 0)
2235        );
2236
2237        // Editor 1 toolbar is hidden since all changes have been reviewed
2238        workspace.update_in(cx, |workspace, window, cx| {
2239            workspace.activate_item(&editor1, true, true, window, cx)
2240        });
2241
2242        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2243            toolbar.active_item,
2244            Some(AgentDiffToolbarItem::Editor {
2245                state: EditorState::Idle,
2246                ..
2247            })
2248        )));
2249        assert_eq!(
2250            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2251            ToolbarItemLocation::Hidden
2252        );
2253    }
2254
2255    fn override_toolbar_agent_review_setting(active: bool, cx: &mut VisualTestContext) {
2256        cx.update(|_window, cx| {
2257            SettingsStore::update_global(cx, |store, _cx| {
2258                let mut editor_settings = store.get::<EditorSettings>(None).clone();
2259                editor_settings.toolbar.agent_review = active;
2260                store.override_global(editor_settings);
2261            })
2262        });
2263        cx.run_until_parked();
2264    }
2265}