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.selections.newest::<Point>(cx).head();
 456
 457    if !diff_hunks.iter().any(|hunk| {
 458        hunk.row_range
 459            .contains(&multi_buffer::MultiBufferRow(newest_cursor.row))
 460    }) {
 461        return;
 462    }
 463
 464    let target_hunk = {
 465        diff_hunks
 466            .last()
 467            .and_then(|last_kept_hunk| {
 468                let last_kept_hunk_end = last_kept_hunk.multi_buffer_range().end;
 469                editor
 470                    .diff_hunks_in_ranges(
 471                        &[last_kept_hunk_end..editor::Anchor::max()],
 472                        buffer_snapshot,
 473                    )
 474                    .nth(1)
 475            })
 476            .or_else(|| {
 477                let first_kept_hunk = diff_hunks.first()?;
 478                let first_kept_hunk_start = first_kept_hunk.multi_buffer_range().start;
 479                editor
 480                    .diff_hunks_in_ranges(
 481                        &[editor::Anchor::min()..first_kept_hunk_start],
 482                        buffer_snapshot,
 483                    )
 484                    .next()
 485            })
 486    };
 487
 488    if let Some(target_hunk) = target_hunk {
 489        editor.change_selections(Default::default(), window, cx, |selections| {
 490            let next_hunk_start = target_hunk.multi_buffer_range().start;
 491            selections.select_anchor_ranges([next_hunk_start..next_hunk_start]);
 492        })
 493    }
 494}
 495
 496impl EventEmitter<EditorEvent> for AgentDiffPane {}
 497
 498impl Focusable for AgentDiffPane {
 499    fn focus_handle(&self, cx: &App) -> FocusHandle {
 500        if self.multibuffer.read(cx).is_empty() {
 501            self.focus_handle.clone()
 502        } else {
 503            self.editor.focus_handle(cx)
 504        }
 505    }
 506}
 507
 508impl Item for AgentDiffPane {
 509    type Event = EditorEvent;
 510
 511    fn tab_icon(&self, _window: &Window, _cx: &App) -> Option<Icon> {
 512        Some(Icon::new(IconName::ZedAssistant).color(Color::Muted))
 513    }
 514
 515    fn to_item_events(event: &EditorEvent, f: impl FnMut(ItemEvent)) {
 516        Editor::to_item_events(event, f)
 517    }
 518
 519    fn deactivated(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 520        self.editor
 521            .update(cx, |editor, cx| editor.deactivated(window, cx));
 522    }
 523
 524    fn navigate(
 525        &mut self,
 526        data: Box<dyn Any>,
 527        window: &mut Window,
 528        cx: &mut Context<Self>,
 529    ) -> bool {
 530        self.editor
 531            .update(cx, |editor, cx| editor.navigate(data, window, cx))
 532    }
 533
 534    fn tab_tooltip_text(&self, _: &App) -> Option<SharedString> {
 535        Some("Agent Diff".into())
 536    }
 537
 538    fn tab_content(&self, params: TabContentParams, _window: &Window, cx: &App) -> AnyElement {
 539        let title = self.thread.title(cx);
 540        Label::new(format!("Review: {}", title))
 541            .color(if params.selected {
 542                Color::Default
 543            } else {
 544                Color::Muted
 545            })
 546            .into_any_element()
 547    }
 548
 549    fn telemetry_event_text(&self) -> Option<&'static str> {
 550        Some("Assistant Diff Opened")
 551    }
 552
 553    fn as_searchable(&self, _: &Entity<Self>) -> Option<Box<dyn SearchableItemHandle>> {
 554        Some(Box::new(self.editor.clone()))
 555    }
 556
 557    fn for_each_project_item(
 558        &self,
 559        cx: &App,
 560        f: &mut dyn FnMut(gpui::EntityId, &dyn project::ProjectItem),
 561    ) {
 562        self.editor.for_each_project_item(cx, f)
 563    }
 564
 565    fn is_singleton(&self, _: &App) -> bool {
 566        false
 567    }
 568
 569    fn set_nav_history(
 570        &mut self,
 571        nav_history: ItemNavHistory,
 572        _: &mut Window,
 573        cx: &mut Context<Self>,
 574    ) {
 575        self.editor.update(cx, |editor, _| {
 576            editor.set_nav_history(Some(nav_history));
 577        });
 578    }
 579
 580    fn clone_on_split(
 581        &self,
 582        _workspace_id: Option<workspace::WorkspaceId>,
 583        window: &mut Window,
 584        cx: &mut Context<Self>,
 585    ) -> Option<Entity<Self>>
 586    where
 587        Self: Sized,
 588    {
 589        Some(cx.new(|cx| Self::new(self.thread.clone(), self.workspace.clone(), window, cx)))
 590    }
 591
 592    fn is_dirty(&self, cx: &App) -> bool {
 593        self.multibuffer.read(cx).is_dirty(cx)
 594    }
 595
 596    fn has_conflict(&self, cx: &App) -> bool {
 597        self.multibuffer.read(cx).has_conflict(cx)
 598    }
 599
 600    fn can_save(&self, _: &App) -> bool {
 601        true
 602    }
 603
 604    fn save(
 605        &mut self,
 606        options: SaveOptions,
 607        project: Entity<Project>,
 608        window: &mut Window,
 609        cx: &mut Context<Self>,
 610    ) -> Task<Result<()>> {
 611        self.editor.save(options, project, window, cx)
 612    }
 613
 614    fn save_as(
 615        &mut self,
 616        _: Entity<Project>,
 617        _: ProjectPath,
 618        _window: &mut Window,
 619        _: &mut Context<Self>,
 620    ) -> Task<Result<()>> {
 621        unreachable!()
 622    }
 623
 624    fn reload(
 625        &mut self,
 626        project: Entity<Project>,
 627        window: &mut Window,
 628        cx: &mut Context<Self>,
 629    ) -> Task<Result<()>> {
 630        self.editor.reload(project, window, cx)
 631    }
 632
 633    fn act_as_type<'a>(
 634        &'a self,
 635        type_id: TypeId,
 636        self_handle: &'a Entity<Self>,
 637        _: &'a App,
 638    ) -> Option<AnyView> {
 639        if type_id == TypeId::of::<Self>() {
 640            Some(self_handle.to_any())
 641        } else if type_id == TypeId::of::<Editor>() {
 642            Some(self.editor.to_any())
 643        } else {
 644            None
 645        }
 646    }
 647
 648    fn breadcrumb_location(&self, _: &App) -> ToolbarItemLocation {
 649        ToolbarItemLocation::PrimaryLeft
 650    }
 651
 652    fn breadcrumbs(&self, theme: &theme::Theme, cx: &App) -> Option<Vec<BreadcrumbText>> {
 653        self.editor.breadcrumbs(theme, cx)
 654    }
 655
 656    fn added_to_workspace(
 657        &mut self,
 658        workspace: &mut Workspace,
 659        window: &mut Window,
 660        cx: &mut Context<Self>,
 661    ) {
 662        self.editor.update(cx, |editor, cx| {
 663            editor.added_to_workspace(workspace, window, cx)
 664        });
 665    }
 666
 667    fn tab_content_text(&self, _detail: usize, _cx: &App) -> SharedString {
 668        "Agent Diff".into()
 669    }
 670}
 671
 672impl Render for AgentDiffPane {
 673    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
 674        let is_empty = self.multibuffer.read(cx).is_empty();
 675        let focus_handle = &self.focus_handle;
 676
 677        div()
 678            .track_focus(focus_handle)
 679            .key_context(if is_empty { "EmptyPane" } else { "AgentDiff" })
 680            .on_action(cx.listener(Self::keep))
 681            .on_action(cx.listener(Self::reject))
 682            .on_action(cx.listener(Self::reject_all))
 683            .on_action(cx.listener(Self::keep_all))
 684            .bg(cx.theme().colors().editor_background)
 685            .flex()
 686            .items_center()
 687            .justify_center()
 688            .size_full()
 689            .when(is_empty, |el| {
 690                el.child(
 691                    v_flex()
 692                        .items_center()
 693                        .gap_2()
 694                        .child("No changes to review")
 695                        .child(
 696                            Button::new("continue-iterating", "Continue Iterating")
 697                                .style(ButtonStyle::Filled)
 698                                .icon(IconName::ForwardArrow)
 699                                .icon_position(IconPosition::Start)
 700                                .icon_size(IconSize::Small)
 701                                .icon_color(Color::Muted)
 702                                .full_width()
 703                                .key_binding(KeyBinding::for_action_in(
 704                                    &ToggleFocus,
 705                                    &focus_handle.clone(),
 706                                    window,
 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,
 724              status: &DiffHunkStatus,
 725              hunk_range,
 726              is_created_file,
 727              line_height,
 728              editor: &Entity<Editor>,
 729              window: &mut Window,
 730              cx: &mut App| {
 731            {
 732                render_diff_hunk_controls(
 733                    row,
 734                    status,
 735                    hunk_range,
 736                    is_created_file,
 737                    line_height,
 738                    &thread,
 739                    editor,
 740                    window,
 741                    cx,
 742                )
 743            }
 744        },
 745    )
 746}
 747
 748fn render_diff_hunk_controls(
 749    row: u32,
 750    _status: &DiffHunkStatus,
 751    hunk_range: Range<editor::Anchor>,
 752    is_created_file: bool,
 753    line_height: Pixels,
 754    thread: &AgentDiffThread,
 755    editor: &Entity<Editor>,
 756    window: &mut Window,
 757    cx: &mut App,
 758) -> AnyElement {
 759    let editor = editor.clone();
 760
 761    h_flex()
 762        .h(line_height)
 763        .mr_0p5()
 764        .gap_1()
 765        .px_0p5()
 766        .pb_1()
 767        .border_x_1()
 768        .border_b_1()
 769        .border_color(cx.theme().colors().border)
 770        .rounded_b_md()
 771        .bg(cx.theme().colors().editor_background)
 772        .gap_1()
 773        .block_mouse_except_scroll()
 774        .shadow_md()
 775        .children(vec![
 776            Button::new(("reject", row as u64), "Reject")
 777                .disabled(is_created_file)
 778                .key_binding(
 779                    KeyBinding::for_action_in(
 780                        &Reject,
 781                        &editor.read(cx).focus_handle(cx),
 782                        window,
 783                        cx,
 784                    )
 785                    .map(|kb| kb.size(rems_from_px(12.))),
 786                )
 787                .on_click({
 788                    let editor = editor.clone();
 789                    let thread = thread.clone();
 790                    move |_event, window, cx| {
 791                        editor.update(cx, |editor, cx| {
 792                            let snapshot = editor.buffer().read(cx).snapshot(cx);
 793                            reject_edits_in_ranges(
 794                                editor,
 795                                &snapshot,
 796                                &thread,
 797                                vec![hunk_range.start..hunk_range.start],
 798                                window,
 799                                cx,
 800                            );
 801                        })
 802                    }
 803                }),
 804            Button::new(("keep", row as u64), "Keep")
 805                .key_binding(
 806                    KeyBinding::for_action_in(&Keep, &editor.read(cx).focus_handle(cx), window, cx)
 807                        .map(|kb| kb.size(rems_from_px(12.))),
 808                )
 809                .on_click({
 810                    let editor = editor.clone();
 811                    let thread = thread.clone();
 812                    move |_event, window, cx| {
 813                        editor.update(cx, |editor, cx| {
 814                            let snapshot = editor.buffer().read(cx).snapshot(cx);
 815                            keep_edits_in_ranges(
 816                                editor,
 817                                &snapshot,
 818                                &thread,
 819                                vec![hunk_range.start..hunk_range.start],
 820                                window,
 821                                cx,
 822                            );
 823                        });
 824                    }
 825                }),
 826        ])
 827        .when(
 828            !editor.read(cx).buffer().read(cx).all_diff_hunks_expanded(),
 829            |el| {
 830                el.child(
 831                    IconButton::new(("next-hunk", row as u64), IconName::ArrowDown)
 832                        .shape(IconButtonShape::Square)
 833                        .icon_size(IconSize::Small)
 834                        // .disabled(!has_multiple_hunks)
 835                        .tooltip({
 836                            let focus_handle = editor.focus_handle(cx);
 837                            move |window, cx| {
 838                                Tooltip::for_action_in(
 839                                    "Next Hunk",
 840                                    &GoToHunk,
 841                                    &focus_handle,
 842                                    window,
 843                                    cx,
 844                                )
 845                            }
 846                        })
 847                        .on_click({
 848                            let editor = editor.clone();
 849                            move |_event, window, cx| {
 850                                editor.update(cx, |editor, cx| {
 851                                    let snapshot = editor.snapshot(window, cx);
 852                                    let position =
 853                                        hunk_range.end.to_point(&snapshot.buffer_snapshot);
 854                                    editor.go_to_hunk_before_or_after_position(
 855                                        &snapshot,
 856                                        position,
 857                                        Direction::Next,
 858                                        window,
 859                                        cx,
 860                                    );
 861                                    editor.expand_selected_diff_hunks(cx);
 862                                });
 863                            }
 864                        }),
 865                )
 866                .child(
 867                    IconButton::new(("prev-hunk", row as u64), IconName::ArrowUp)
 868                        .shape(IconButtonShape::Square)
 869                        .icon_size(IconSize::Small)
 870                        // .disabled(!has_multiple_hunks)
 871                        .tooltip({
 872                            let focus_handle = editor.focus_handle(cx);
 873                            move |window, cx| {
 874                                Tooltip::for_action_in(
 875                                    "Previous Hunk",
 876                                    &GoToPreviousHunk,
 877                                    &focus_handle,
 878                                    window,
 879                                    cx,
 880                                )
 881                            }
 882                        })
 883                        .on_click({
 884                            let editor = editor.clone();
 885                            move |_event, window, cx| {
 886                                editor.update(cx, |editor, cx| {
 887                                    let snapshot = editor.snapshot(window, cx);
 888                                    let point =
 889                                        hunk_range.start.to_point(&snapshot.buffer_snapshot);
 890                                    editor.go_to_hunk_before_or_after_position(
 891                                        &snapshot,
 892                                        point,
 893                                        Direction::Prev,
 894                                        window,
 895                                        cx,
 896                                    );
 897                                    editor.expand_selected_diff_hunks(cx);
 898                                });
 899                            }
 900                        }),
 901                )
 902            },
 903        )
 904        .into_any_element()
 905}
 906
 907struct AgentDiffAddon;
 908
 909impl editor::Addon for AgentDiffAddon {
 910    fn to_any(&self) -> &dyn std::any::Any {
 911        self
 912    }
 913
 914    fn extend_key_context(&self, key_context: &mut gpui::KeyContext, _: &App) {
 915        key_context.add("agent_diff");
 916    }
 917}
 918
 919pub struct AgentDiffToolbar {
 920    active_item: Option<AgentDiffToolbarItem>,
 921    _settings_subscription: Subscription,
 922}
 923
 924pub enum AgentDiffToolbarItem {
 925    Pane(WeakEntity<AgentDiffPane>),
 926    Editor {
 927        editor: WeakEntity<Editor>,
 928        state: EditorState,
 929        _diff_subscription: Subscription,
 930    },
 931}
 932
 933impl AgentDiffToolbar {
 934    pub fn new(cx: &mut Context<Self>) -> Self {
 935        Self {
 936            active_item: None,
 937            _settings_subscription: cx.observe_global::<SettingsStore>(Self::update_location),
 938        }
 939    }
 940
 941    fn dispatch_action(&self, action: &dyn Action, window: &mut Window, cx: &mut Context<Self>) {
 942        let Some(active_item) = self.active_item.as_ref() else {
 943            return;
 944        };
 945
 946        match active_item {
 947            AgentDiffToolbarItem::Pane(agent_diff) => {
 948                if let Some(agent_diff) = agent_diff.upgrade() {
 949                    agent_diff.focus_handle(cx).focus(window);
 950                }
 951            }
 952            AgentDiffToolbarItem::Editor { editor, .. } => {
 953                if let Some(editor) = editor.upgrade() {
 954                    editor.read(cx).focus_handle(cx).focus(window);
 955                }
 956            }
 957        }
 958
 959        let action = action.boxed_clone();
 960        cx.defer(move |cx| {
 961            cx.dispatch_action(action.as_ref());
 962        })
 963    }
 964
 965    fn handle_diff_notify(&mut self, agent_diff: Entity<AgentDiff>, cx: &mut Context<Self>) {
 966        let Some(AgentDiffToolbarItem::Editor { editor, state, .. }) = self.active_item.as_mut()
 967        else {
 968            return;
 969        };
 970
 971        *state = agent_diff.read(cx).editor_state(editor);
 972        self.update_location(cx);
 973        cx.notify();
 974    }
 975
 976    fn update_location(&mut self, cx: &mut Context<Self>) {
 977        let location = self.location(cx);
 978        cx.emit(ToolbarItemEvent::ChangeLocation(location));
 979    }
 980
 981    fn location(&self, cx: &App) -> ToolbarItemLocation {
 982        if !EditorSettings::get_global(cx).toolbar.agent_review {
 983            return ToolbarItemLocation::Hidden;
 984        }
 985
 986        match &self.active_item {
 987            None => ToolbarItemLocation::Hidden,
 988            Some(AgentDiffToolbarItem::Pane(_)) => ToolbarItemLocation::PrimaryRight,
 989            Some(AgentDiffToolbarItem::Editor { state, .. }) => match state {
 990                EditorState::Generating | EditorState::Reviewing => {
 991                    ToolbarItemLocation::PrimaryRight
 992                }
 993                EditorState::Idle => ToolbarItemLocation::Hidden,
 994            },
 995        }
 996    }
 997}
 998
 999impl EventEmitter<ToolbarItemEvent> for AgentDiffToolbar {}
1000
1001impl ToolbarItemView for AgentDiffToolbar {
1002    fn set_active_pane_item(
1003        &mut self,
1004        active_pane_item: Option<&dyn ItemHandle>,
1005        _: &mut Window,
1006        cx: &mut Context<Self>,
1007    ) -> ToolbarItemLocation {
1008        if let Some(item) = active_pane_item {
1009            if let Some(pane) = item.act_as::<AgentDiffPane>(cx) {
1010                self.active_item = Some(AgentDiffToolbarItem::Pane(pane.downgrade()));
1011                return self.location(cx);
1012            }
1013
1014            if let Some(editor) = item.act_as::<Editor>(cx)
1015                && editor.read(cx).mode().is_full()
1016            {
1017                let agent_diff = AgentDiff::global(cx);
1018
1019                self.active_item = Some(AgentDiffToolbarItem::Editor {
1020                    editor: editor.downgrade(),
1021                    state: agent_diff.read(cx).editor_state(&editor.downgrade()),
1022                    _diff_subscription: cx.observe(&agent_diff, Self::handle_diff_notify),
1023                });
1024
1025                return self.location(cx);
1026            }
1027        }
1028
1029        self.active_item = None;
1030        self.location(cx)
1031    }
1032
1033    fn pane_focus_update(
1034        &mut self,
1035        _pane_focused: bool,
1036        _window: &mut Window,
1037        _cx: &mut Context<Self>,
1038    ) {
1039    }
1040}
1041
1042impl Render for AgentDiffToolbar {
1043    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
1044        let spinner_icon = div()
1045            .px_0p5()
1046            .id("generating")
1047            .tooltip(Tooltip::text("Generating Changes…"))
1048            .child(
1049                Icon::new(IconName::LoadCircle)
1050                    .size(IconSize::Small)
1051                    .color(Color::Accent)
1052                    .with_rotate_animation(3),
1053            )
1054            .into_any();
1055
1056        let Some(active_item) = self.active_item.as_ref() else {
1057            return Empty.into_any();
1058        };
1059
1060        match active_item {
1061            AgentDiffToolbarItem::Editor { editor, state, .. } => {
1062                let Some(editor) = editor.upgrade() else {
1063                    return Empty.into_any();
1064                };
1065
1066                let editor_focus_handle = editor.read(cx).focus_handle(cx);
1067
1068                let content = match state {
1069                    EditorState::Idle => return Empty.into_any(),
1070                    EditorState::Generating => vec![spinner_icon],
1071                    EditorState::Reviewing => vec![
1072                        h_flex()
1073                            .child(
1074                                IconButton::new("hunk-up", IconName::ArrowUp)
1075                                    .icon_size(IconSize::Small)
1076                                    .tooltip(Tooltip::for_action_title_in(
1077                                        "Previous Hunk",
1078                                        &GoToPreviousHunk,
1079                                        &editor_focus_handle,
1080                                    ))
1081                                    .on_click({
1082                                        let editor_focus_handle = editor_focus_handle.clone();
1083                                        move |_, window, cx| {
1084                                            editor_focus_handle.dispatch_action(
1085                                                &GoToPreviousHunk,
1086                                                window,
1087                                                cx,
1088                                            );
1089                                        }
1090                                    }),
1091                            )
1092                            .child(
1093                                IconButton::new("hunk-down", IconName::ArrowDown)
1094                                    .icon_size(IconSize::Small)
1095                                    .tooltip(Tooltip::for_action_title_in(
1096                                        "Next Hunk",
1097                                        &GoToHunk,
1098                                        &editor_focus_handle,
1099                                    ))
1100                                    .on_click({
1101                                        let editor_focus_handle = editor_focus_handle.clone();
1102                                        move |_, window, cx| {
1103                                            editor_focus_handle
1104                                                .dispatch_action(&GoToHunk, window, cx);
1105                                        }
1106                                    }),
1107                            )
1108                            .into_any_element(),
1109                        vertical_divider().into_any_element(),
1110                        h_flex()
1111                            .gap_0p5()
1112                            .child(
1113                                Button::new("reject-all", "Reject All")
1114                                    .key_binding({
1115                                        KeyBinding::for_action_in(
1116                                            &RejectAll,
1117                                            &editor_focus_handle,
1118                                            window,
1119                                            cx,
1120                                        )
1121                                        .map(|kb| kb.size(rems_from_px(12.)))
1122                                    })
1123                                    .on_click(cx.listener(|this, _, window, cx| {
1124                                        this.dispatch_action(&RejectAll, window, cx)
1125                                    })),
1126                            )
1127                            .child(
1128                                Button::new("keep-all", "Keep All")
1129                                    .key_binding({
1130                                        KeyBinding::for_action_in(
1131                                            &KeepAll,
1132                                            &editor_focus_handle,
1133                                            window,
1134                                            cx,
1135                                        )
1136                                        .map(|kb| kb.size(rems_from_px(12.)))
1137                                    })
1138                                    .on_click(cx.listener(|this, _, window, cx| {
1139                                        this.dispatch_action(&KeepAll, window, cx)
1140                                    })),
1141                            )
1142                            .into_any_element(),
1143                    ],
1144                };
1145
1146                h_flex()
1147                    .track_focus(&editor_focus_handle)
1148                    .size_full()
1149                    .px_1()
1150                    .mr_1()
1151                    .gap_1()
1152                    .children(content)
1153                    .child(vertical_divider())
1154                    .when_some(editor.read(cx).workspace(), |this, _workspace| {
1155                        this.child(
1156                            IconButton::new("review", IconName::ListTodo)
1157                                .icon_size(IconSize::Small)
1158                                .tooltip(Tooltip::for_action_title_in(
1159                                    "Review All Files",
1160                                    &OpenAgentDiff,
1161                                    &editor_focus_handle,
1162                                ))
1163                                .on_click({
1164                                    cx.listener(move |this, _, window, cx| {
1165                                        this.dispatch_action(&OpenAgentDiff, window, cx);
1166                                    })
1167                                }),
1168                        )
1169                    })
1170                    .child(vertical_divider())
1171                    .on_action({
1172                        let editor = editor.clone();
1173                        move |_action: &OpenAgentDiff, window, cx| {
1174                            AgentDiff::global(cx).update(cx, |agent_diff, cx| {
1175                                agent_diff.deploy_pane_from_editor(&editor, window, cx);
1176                            });
1177                        }
1178                    })
1179                    .into_any()
1180            }
1181            AgentDiffToolbarItem::Pane(agent_diff) => {
1182                let Some(agent_diff) = agent_diff.upgrade() else {
1183                    return Empty.into_any();
1184                };
1185
1186                let has_pending_edit_tool_use =
1187                    agent_diff.read(cx).thread.has_pending_edit_tool_uses(cx);
1188
1189                if has_pending_edit_tool_use {
1190                    return div().px_2().child(spinner_icon).into_any();
1191                }
1192
1193                let is_empty = agent_diff.read(cx).multibuffer.read(cx).is_empty();
1194                if is_empty {
1195                    return Empty.into_any();
1196                }
1197
1198                let focus_handle = agent_diff.focus_handle(cx);
1199
1200                h_group_xl()
1201                    .my_neg_1()
1202                    .py_1()
1203                    .items_center()
1204                    .flex_wrap()
1205                    .child(
1206                        h_group_sm()
1207                            .child(
1208                                Button::new("reject-all", "Reject All")
1209                                    .key_binding({
1210                                        KeyBinding::for_action_in(
1211                                            &RejectAll,
1212                                            &focus_handle,
1213                                            window,
1214                                            cx,
1215                                        )
1216                                        .map(|kb| kb.size(rems_from_px(12.)))
1217                                    })
1218                                    .on_click(cx.listener(|this, _, window, cx| {
1219                                        this.dispatch_action(&RejectAll, window, cx)
1220                                    })),
1221                            )
1222                            .child(
1223                                Button::new("keep-all", "Keep All")
1224                                    .key_binding({
1225                                        KeyBinding::for_action_in(
1226                                            &KeepAll,
1227                                            &focus_handle,
1228                                            window,
1229                                            cx,
1230                                        )
1231                                        .map(|kb| kb.size(rems_from_px(12.)))
1232                                    })
1233                                    .on_click(cx.listener(|this, _, window, cx| {
1234                                        this.dispatch_action(&KeepAll, window, cx)
1235                                    })),
1236                            ),
1237                    )
1238                    .into_any()
1239            }
1240        }
1241    }
1242}
1243
1244#[derive(Default)]
1245pub struct AgentDiff {
1246    reviewing_editors: HashMap<WeakEntity<Editor>, EditorState>,
1247    workspace_threads: HashMap<WeakEntity<Workspace>, WorkspaceThread>,
1248}
1249
1250#[derive(Clone, Debug, PartialEq, Eq)]
1251pub enum EditorState {
1252    Idle,
1253    Reviewing,
1254    Generating,
1255}
1256
1257struct WorkspaceThread {
1258    thread: WeakAgentDiffThread,
1259    _thread_subscriptions: (Subscription, Subscription),
1260    singleton_editors: HashMap<WeakEntity<Buffer>, HashMap<WeakEntity<Editor>, Subscription>>,
1261    _settings_subscription: Subscription,
1262    _workspace_subscription: Option<Subscription>,
1263}
1264
1265struct AgentDiffGlobal(Entity<AgentDiff>);
1266
1267impl Global for AgentDiffGlobal {}
1268
1269impl AgentDiff {
1270    fn global(cx: &mut App) -> Entity<Self> {
1271        cx.try_global::<AgentDiffGlobal>()
1272            .map(|global| global.0.clone())
1273            .unwrap_or_else(|| {
1274                let entity = cx.new(|_cx| Self::default());
1275                let global = AgentDiffGlobal(entity.clone());
1276                cx.set_global(global);
1277                entity
1278            })
1279    }
1280
1281    pub fn set_active_thread(
1282        workspace: &WeakEntity<Workspace>,
1283        thread: impl Into<AgentDiffThread>,
1284        window: &mut Window,
1285        cx: &mut App,
1286    ) {
1287        Self::global(cx).update(cx, |this, cx| {
1288            this.register_active_thread_impl(workspace, thread.into(), window, cx);
1289        });
1290    }
1291
1292    fn register_active_thread_impl(
1293        &mut self,
1294        workspace: &WeakEntity<Workspace>,
1295        thread: AgentDiffThread,
1296        window: &mut Window,
1297        cx: &mut Context<Self>,
1298    ) {
1299        let action_log = thread.action_log(cx);
1300
1301        let action_log_subscription = cx.observe_in(&action_log, window, {
1302            let workspace = workspace.clone();
1303            move |this, _action_log, window, cx| {
1304                this.update_reviewing_editors(&workspace, window, cx);
1305            }
1306        });
1307
1308        let thread_subscription = match &thread {
1309            AgentDiffThread::AcpThread(thread) => cx.subscribe_in(thread, window, {
1310                let workspace = workspace.clone();
1311                move |this, thread, event, window, cx| {
1312                    this.handle_acp_thread_event(&workspace, thread, event, window, cx)
1313                }
1314            }),
1315        };
1316
1317        if let Some(workspace_thread) = self.workspace_threads.get_mut(workspace) {
1318            // replace thread and action log subscription, but keep editors
1319            workspace_thread.thread = thread.downgrade();
1320            workspace_thread._thread_subscriptions = (action_log_subscription, thread_subscription);
1321            self.update_reviewing_editors(workspace, window, cx);
1322            return;
1323        }
1324
1325        let settings_subscription = cx.observe_global_in::<SettingsStore>(window, {
1326            let workspace = workspace.clone();
1327            let mut was_active = AgentSettings::get_global(cx).single_file_review;
1328            move |this, window, cx| {
1329                let is_active = AgentSettings::get_global(cx).single_file_review;
1330                if was_active != is_active {
1331                    was_active = is_active;
1332                    this.update_reviewing_editors(&workspace, window, cx);
1333                }
1334            }
1335        });
1336
1337        let workspace_subscription = workspace
1338            .upgrade()
1339            .map(|workspace| cx.subscribe_in(&workspace, window, Self::handle_workspace_event));
1340
1341        self.workspace_threads.insert(
1342            workspace.clone(),
1343            WorkspaceThread {
1344                thread: thread.downgrade(),
1345                _thread_subscriptions: (action_log_subscription, thread_subscription),
1346                singleton_editors: HashMap::default(),
1347                _settings_subscription: settings_subscription,
1348                _workspace_subscription: workspace_subscription,
1349            },
1350        );
1351
1352        let workspace = workspace.clone();
1353        cx.defer_in(window, move |this, window, cx| {
1354            if let Some(workspace) = workspace.upgrade() {
1355                this.register_workspace(workspace, window, cx);
1356            }
1357        });
1358    }
1359
1360    fn register_workspace(
1361        &mut self,
1362        workspace: Entity<Workspace>,
1363        window: &mut Window,
1364        cx: &mut Context<Self>,
1365    ) {
1366        let agent_diff = cx.entity();
1367
1368        let editors = workspace.update(cx, |workspace, cx| {
1369            let agent_diff = agent_diff.clone();
1370
1371            Self::register_review_action::<Keep>(workspace, Self::keep, &agent_diff);
1372            Self::register_review_action::<Reject>(workspace, Self::reject, &agent_diff);
1373            Self::register_review_action::<KeepAll>(workspace, Self::keep_all, &agent_diff);
1374            Self::register_review_action::<RejectAll>(workspace, Self::reject_all, &agent_diff);
1375
1376            workspace.items_of_type(cx).collect::<Vec<_>>()
1377        });
1378
1379        let weak_workspace = workspace.downgrade();
1380
1381        for editor in editors {
1382            if let Some(buffer) = Self::full_editor_buffer(editor.read(cx), cx) {
1383                self.register_editor(weak_workspace.clone(), buffer, editor, window, cx);
1384            };
1385        }
1386
1387        self.update_reviewing_editors(&weak_workspace, window, cx);
1388    }
1389
1390    fn register_review_action<T: Action>(
1391        workspace: &mut Workspace,
1392        review: impl Fn(&Entity<Editor>, &AgentDiffThread, &mut Window, &mut App) -> PostReviewState
1393        + 'static,
1394        this: &Entity<AgentDiff>,
1395    ) {
1396        let this = this.clone();
1397        workspace.register_action(move |workspace, _: &T, window, cx| {
1398            let review = &review;
1399            let task = this.update(cx, |this, cx| {
1400                this.review_in_active_editor(workspace, review, window, cx)
1401            });
1402
1403            if let Some(task) = task {
1404                task.detach_and_log_err(cx);
1405            } else {
1406                cx.propagate();
1407            }
1408        });
1409    }
1410
1411    fn handle_acp_thread_event(
1412        &mut self,
1413        workspace: &WeakEntity<Workspace>,
1414        thread: &Entity<AcpThread>,
1415        event: &AcpThreadEvent,
1416        window: &mut Window,
1417        cx: &mut Context<Self>,
1418    ) {
1419        match event {
1420            AcpThreadEvent::NewEntry => {
1421                if thread
1422                    .read(cx)
1423                    .entries()
1424                    .last()
1425                    .is_some_and(|entry| entry.diffs().next().is_some())
1426                {
1427                    self.update_reviewing_editors(workspace, window, cx);
1428                }
1429            }
1430            AcpThreadEvent::EntryUpdated(ix) => {
1431                if thread
1432                    .read(cx)
1433                    .entries()
1434                    .get(*ix)
1435                    .is_some_and(|entry| entry.diffs().next().is_some())
1436                {
1437                    self.update_reviewing_editors(workspace, window, cx);
1438                }
1439            }
1440            AcpThreadEvent::Stopped
1441            | AcpThreadEvent::Error
1442            | AcpThreadEvent::LoadError(_)
1443            | AcpThreadEvent::Refusal => {
1444                self.update_reviewing_editors(workspace, window, cx);
1445            }
1446            AcpThreadEvent::TitleUpdated
1447            | AcpThreadEvent::TokenUsageUpdated
1448            | AcpThreadEvent::EntriesRemoved(_)
1449            | AcpThreadEvent::ToolAuthorizationRequired
1450            | AcpThreadEvent::PromptCapabilitiesUpdated
1451            | AcpThreadEvent::AvailableCommandsUpdated(_)
1452            | AcpThreadEvent::Retry(_)
1453            | AcpThreadEvent::ModeUpdated(_) => {}
1454        }
1455    }
1456
1457    fn handle_workspace_event(
1458        &mut self,
1459        workspace: &Entity<Workspace>,
1460        event: &workspace::Event,
1461        window: &mut Window,
1462        cx: &mut Context<Self>,
1463    ) {
1464        if let workspace::Event::ItemAdded { item } = event
1465            && let Some(editor) = item.downcast::<Editor>()
1466            && let Some(buffer) = Self::full_editor_buffer(editor.read(cx), cx)
1467        {
1468            self.register_editor(workspace.downgrade(), buffer, editor, window, cx);
1469        }
1470    }
1471
1472    fn full_editor_buffer(editor: &Editor, cx: &App) -> Option<WeakEntity<Buffer>> {
1473        if editor.mode().is_full() {
1474            editor
1475                .buffer()
1476                .read(cx)
1477                .as_singleton()
1478                .map(|buffer| buffer.downgrade())
1479        } else {
1480            None
1481        }
1482    }
1483
1484    fn register_editor(
1485        &mut self,
1486        workspace: WeakEntity<Workspace>,
1487        buffer: WeakEntity<Buffer>,
1488        editor: Entity<Editor>,
1489        window: &mut Window,
1490        cx: &mut Context<Self>,
1491    ) {
1492        let Some(workspace_thread) = self.workspace_threads.get_mut(&workspace) else {
1493            return;
1494        };
1495
1496        let weak_editor = editor.downgrade();
1497
1498        workspace_thread
1499            .singleton_editors
1500            .entry(buffer.clone())
1501            .or_default()
1502            .entry(weak_editor.clone())
1503            .or_insert_with(|| {
1504                let workspace = workspace.clone();
1505                cx.observe_release(&editor, move |this, _, _cx| {
1506                    let Some(active_thread) = this.workspace_threads.get_mut(&workspace) else {
1507                        return;
1508                    };
1509
1510                    if let Entry::Occupied(mut entry) =
1511                        active_thread.singleton_editors.entry(buffer)
1512                    {
1513                        let set = entry.get_mut();
1514                        set.remove(&weak_editor);
1515
1516                        if set.is_empty() {
1517                            entry.remove();
1518                        }
1519                    }
1520                })
1521            });
1522
1523        self.update_reviewing_editors(&workspace, window, cx);
1524    }
1525
1526    fn update_reviewing_editors(
1527        &mut self,
1528        workspace: &WeakEntity<Workspace>,
1529        window: &mut Window,
1530        cx: &mut Context<Self>,
1531    ) {
1532        if !AgentSettings::get_global(cx).single_file_review {
1533            for (editor, _) in self.reviewing_editors.drain() {
1534                editor
1535                    .update(cx, |editor, cx| {
1536                        editor.end_temporary_diff_override(cx);
1537                        editor.unregister_addon::<EditorAgentDiffAddon>();
1538                    })
1539                    .ok();
1540            }
1541            return;
1542        }
1543
1544        let Some(workspace_thread) = self.workspace_threads.get_mut(workspace) else {
1545            return;
1546        };
1547
1548        let Some(thread) = workspace_thread.thread.upgrade() else {
1549            return;
1550        };
1551
1552        let action_log = thread.action_log(cx);
1553        let changed_buffers = action_log.read(cx).changed_buffers(cx);
1554
1555        let mut unaffected = self.reviewing_editors.clone();
1556
1557        for (buffer, diff_handle) in changed_buffers {
1558            if buffer.read(cx).file().is_none() {
1559                continue;
1560            }
1561
1562            let Some(buffer_editors) = workspace_thread.singleton_editors.get(&buffer.downgrade())
1563            else {
1564                continue;
1565            };
1566
1567            for weak_editor in buffer_editors.keys() {
1568                let Some(editor) = weak_editor.upgrade() else {
1569                    continue;
1570                };
1571
1572                let multibuffer = editor.read(cx).buffer().clone();
1573                multibuffer.update(cx, |multibuffer, cx| {
1574                    multibuffer.add_diff(diff_handle.clone(), cx);
1575                });
1576
1577                let new_state = if thread.is_generating(cx) {
1578                    EditorState::Generating
1579                } else {
1580                    EditorState::Reviewing
1581                };
1582
1583                let previous_state = self
1584                    .reviewing_editors
1585                    .insert(weak_editor.clone(), new_state.clone());
1586
1587                if previous_state.is_none() {
1588                    editor.update(cx, |editor, cx| {
1589                        editor.start_temporary_diff_override();
1590                        editor.set_render_diff_hunk_controls(diff_hunk_controls(&thread), cx);
1591                        editor.set_expand_all_diff_hunks(cx);
1592                        editor.register_addon(EditorAgentDiffAddon);
1593                    });
1594                } else {
1595                    unaffected.remove(weak_editor);
1596                }
1597
1598                if new_state == EditorState::Reviewing && previous_state != Some(new_state) {
1599                    // Jump to first hunk when we enter review mode
1600                    editor.update(cx, |editor, cx| {
1601                        let snapshot = multibuffer.read(cx).snapshot(cx);
1602                        if let Some(first_hunk) = snapshot.diff_hunks().next() {
1603                            let first_hunk_start = first_hunk.multi_buffer_range().start;
1604
1605                            editor.change_selections(
1606                                SelectionEffects::scroll(Autoscroll::center()),
1607                                window,
1608                                cx,
1609                                |selections| {
1610                                    selections.select_ranges([first_hunk_start..first_hunk_start])
1611                                },
1612                            );
1613                        }
1614                    });
1615                }
1616            }
1617        }
1618
1619        // Remove editors from this workspace that are no longer under review
1620        for (editor, _) in unaffected {
1621            // Note: We could avoid this check by storing `reviewing_editors` by Workspace,
1622            // but that would add another lookup in `AgentDiff::editor_state`
1623            // which gets called much more frequently.
1624            let in_workspace = editor
1625                .read_with(cx, |editor, _cx| editor.workspace())
1626                .ok()
1627                .flatten()
1628                .is_some_and(|editor_workspace| {
1629                    editor_workspace.entity_id() == workspace.entity_id()
1630                });
1631
1632            if in_workspace {
1633                editor
1634                    .update(cx, |editor, cx| {
1635                        editor.end_temporary_diff_override(cx);
1636                        editor.unregister_addon::<EditorAgentDiffAddon>();
1637                    })
1638                    .ok();
1639                self.reviewing_editors.remove(&editor);
1640            }
1641        }
1642
1643        cx.notify();
1644    }
1645
1646    fn editor_state(&self, editor: &WeakEntity<Editor>) -> EditorState {
1647        self.reviewing_editors
1648            .get(editor)
1649            .cloned()
1650            .unwrap_or(EditorState::Idle)
1651    }
1652
1653    fn deploy_pane_from_editor(&self, editor: &Entity<Editor>, window: &mut Window, cx: &mut App) {
1654        let Some(workspace) = editor.read(cx).workspace() else {
1655            return;
1656        };
1657
1658        let Some(WorkspaceThread { thread, .. }) =
1659            self.workspace_threads.get(&workspace.downgrade())
1660        else {
1661            return;
1662        };
1663
1664        let Some(thread) = thread.upgrade() else {
1665            return;
1666        };
1667
1668        AgentDiffPane::deploy(thread, workspace.downgrade(), window, cx).log_err();
1669    }
1670
1671    fn keep_all(
1672        editor: &Entity<Editor>,
1673        thread: &AgentDiffThread,
1674        window: &mut Window,
1675        cx: &mut App,
1676    ) -> PostReviewState {
1677        editor.update(cx, |editor, cx| {
1678            let snapshot = editor.buffer().read(cx).snapshot(cx);
1679            keep_edits_in_ranges(
1680                editor,
1681                &snapshot,
1682                thread,
1683                vec![editor::Anchor::min()..editor::Anchor::max()],
1684                window,
1685                cx,
1686            );
1687        });
1688        PostReviewState::AllReviewed
1689    }
1690
1691    fn reject_all(
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_ranges(
1700                editor,
1701                &snapshot,
1702                thread,
1703                vec![editor::Anchor::min()..editor::Anchor::max()],
1704                window,
1705                cx,
1706            );
1707        });
1708        PostReviewState::AllReviewed
1709    }
1710
1711    fn keep(
1712        editor: &Entity<Editor>,
1713        thread: &AgentDiffThread,
1714        window: &mut Window,
1715        cx: &mut App,
1716    ) -> PostReviewState {
1717        editor.update(cx, |editor, cx| {
1718            let snapshot = editor.buffer().read(cx).snapshot(cx);
1719            keep_edits_in_selection(editor, &snapshot, thread, window, cx);
1720            Self::post_review_state(&snapshot)
1721        })
1722    }
1723
1724    fn reject(
1725        editor: &Entity<Editor>,
1726        thread: &AgentDiffThread,
1727        window: &mut Window,
1728        cx: &mut App,
1729    ) -> PostReviewState {
1730        editor.update(cx, |editor, cx| {
1731            let snapshot = editor.buffer().read(cx).snapshot(cx);
1732            reject_edits_in_selection(editor, &snapshot, thread, window, cx);
1733            Self::post_review_state(&snapshot)
1734        })
1735    }
1736
1737    fn post_review_state(snapshot: &MultiBufferSnapshot) -> PostReviewState {
1738        for (i, _) in snapshot.diff_hunks().enumerate() {
1739            if i > 0 {
1740                return PostReviewState::Pending;
1741            }
1742        }
1743        PostReviewState::AllReviewed
1744    }
1745
1746    fn review_in_active_editor(
1747        &mut self,
1748        workspace: &mut Workspace,
1749        review: impl Fn(&Entity<Editor>, &AgentDiffThread, &mut Window, &mut App) -> PostReviewState,
1750        window: &mut Window,
1751        cx: &mut Context<Self>,
1752    ) -> Option<Task<Result<()>>> {
1753        let active_item = workspace.active_item(cx)?;
1754        let editor = active_item.act_as::<Editor>(cx)?;
1755
1756        if !matches!(
1757            self.editor_state(&editor.downgrade()),
1758            EditorState::Reviewing
1759        ) {
1760            return None;
1761        }
1762
1763        let WorkspaceThread { thread, .. } =
1764            self.workspace_threads.get(&workspace.weak_handle())?;
1765
1766        let thread = thread.upgrade()?;
1767
1768        if let PostReviewState::AllReviewed = review(&editor, &thread, window, cx)
1769            && let Some(curr_buffer) = editor.read(cx).buffer().read(cx).as_singleton()
1770        {
1771            let changed_buffers = thread.action_log(cx).read(cx).changed_buffers(cx);
1772
1773            let mut keys = changed_buffers.keys().cycle();
1774            keys.find(|k| *k == &curr_buffer);
1775            let next_project_path = keys
1776                .next()
1777                .filter(|k| *k != &curr_buffer)
1778                .and_then(|after| after.read(cx).project_path(cx));
1779
1780            if let Some(path) = next_project_path {
1781                let task = workspace.open_path(path, None, true, window, cx);
1782                let task = cx.spawn(async move |_, _cx| task.await.map(|_| ()));
1783                return Some(task);
1784            }
1785        }
1786
1787        Some(Task::ready(Ok(())))
1788    }
1789}
1790
1791enum PostReviewState {
1792    AllReviewed,
1793    Pending,
1794}
1795
1796pub struct EditorAgentDiffAddon;
1797
1798impl editor::Addon for EditorAgentDiffAddon {
1799    fn to_any(&self) -> &dyn std::any::Any {
1800        self
1801    }
1802
1803    fn extend_key_context(&self, key_context: &mut gpui::KeyContext, _: &App) {
1804        key_context.add("agent_diff");
1805        key_context.add("editor_agent_diff");
1806    }
1807}
1808
1809#[cfg(test)]
1810mod tests {
1811    use super::*;
1812    use crate::Keep;
1813    use acp_thread::AgentConnection as _;
1814    use agent_settings::AgentSettings;
1815    use editor::EditorSettings;
1816    use gpui::{TestAppContext, UpdateGlobal, VisualTestContext};
1817    use project::{FakeFs, Project};
1818    use serde_json::json;
1819    use settings::{Settings, SettingsStore};
1820    use std::{path::Path, rc::Rc};
1821    use theme::ThemeSettings;
1822    use util::path;
1823
1824    #[gpui::test]
1825    async fn test_multibuffer_agent_diff(cx: &mut TestAppContext) {
1826        cx.update(|cx| {
1827            let settings_store = SettingsStore::test(cx);
1828            cx.set_global(settings_store);
1829            language::init(cx);
1830            Project::init_settings(cx);
1831            AgentSettings::register(cx);
1832            prompt_store::init(cx);
1833            workspace::init_settings(cx);
1834            ThemeSettings::register(cx);
1835            EditorSettings::register(cx);
1836            language_model::init_settings(cx);
1837        });
1838
1839        let fs = FakeFs::new(cx.executor());
1840        fs.insert_tree(
1841            path!("/test"),
1842            json!({"file1": "abc\ndef\nghi\njkl\nmno\npqr\nstu\nvwx\nyz"}),
1843        )
1844        .await;
1845        let project = Project::test(fs, [path!("/test").as_ref()], cx).await;
1846        let buffer_path = project
1847            .read_with(cx, |project, cx| {
1848                project.find_project_path("test/file1", cx)
1849            })
1850            .unwrap();
1851
1852        let connection = Rc::new(acp_thread::StubAgentConnection::new());
1853        let thread = cx
1854            .update(|cx| {
1855                connection
1856                    .clone()
1857                    .new_thread(project.clone(), Path::new(path!("/test")), cx)
1858            })
1859            .await
1860            .unwrap();
1861
1862        let thread = AgentDiffThread::AcpThread(thread);
1863        let action_log = cx.read(|cx| thread.action_log(cx));
1864
1865        let (workspace, cx) =
1866            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1867        let agent_diff = cx.new_window_entity(|window, cx| {
1868            AgentDiffPane::new(thread.clone(), workspace.downgrade(), window, cx)
1869        });
1870        let editor = agent_diff.read_with(cx, |diff, _cx| diff.editor.clone());
1871
1872        let buffer = project
1873            .update(cx, |project, cx| project.open_buffer(buffer_path, cx))
1874            .await
1875            .unwrap();
1876        cx.update(|_, cx| {
1877            action_log.update(cx, |log, cx| log.buffer_read(buffer.clone(), cx));
1878            buffer.update(cx, |buffer, cx| {
1879                buffer
1880                    .edit(
1881                        [
1882                            (Point::new(1, 1)..Point::new(1, 2), "E"),
1883                            (Point::new(3, 2)..Point::new(3, 3), "L"),
1884                            (Point::new(5, 0)..Point::new(5, 1), "P"),
1885                            (Point::new(7, 1)..Point::new(7, 2), "W"),
1886                        ],
1887                        None,
1888                        cx,
1889                    )
1890                    .unwrap()
1891            });
1892            action_log.update(cx, |log, cx| log.buffer_edited(buffer.clone(), cx));
1893        });
1894        cx.run_until_parked();
1895
1896        // When opening the assistant diff, the cursor is positioned on the first hunk.
1897        assert_eq!(
1898            editor.read_with(cx, |editor, cx| editor.text(cx)),
1899            "abc\ndef\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
1900        );
1901        assert_eq!(
1902            editor
1903                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
1904                .range(),
1905            Point::new(1, 0)..Point::new(1, 0)
1906        );
1907
1908        // After keeping a hunk, the cursor should be positioned on the second hunk.
1909        agent_diff.update_in(cx, |diff, window, cx| diff.keep(&Keep, window, cx));
1910        cx.run_until_parked();
1911        assert_eq!(
1912            editor.read_with(cx, |editor, cx| editor.text(cx)),
1913            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
1914        );
1915        assert_eq!(
1916            editor
1917                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
1918                .range(),
1919            Point::new(3, 0)..Point::new(3, 0)
1920        );
1921
1922        // Rejecting a hunk also moves the cursor to the next hunk, possibly cycling if it's at the end.
1923        editor.update_in(cx, |editor, window, cx| {
1924            editor.change_selections(SelectionEffects::no_scroll(), window, cx, |selections| {
1925                selections.select_ranges([Point::new(10, 0)..Point::new(10, 0)])
1926            });
1927        });
1928        agent_diff.update_in(cx, |diff, window, cx| {
1929            diff.reject(&crate::Reject, window, cx)
1930        });
1931        cx.run_until_parked();
1932        assert_eq!(
1933            editor.read_with(cx, |editor, cx| editor.text(cx)),
1934            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nyz"
1935        );
1936        assert_eq!(
1937            editor
1938                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
1939                .range(),
1940            Point::new(3, 0)..Point::new(3, 0)
1941        );
1942
1943        // Keeping a range that doesn't intersect the current selection doesn't move it.
1944        agent_diff.update_in(cx, |_diff, window, cx| {
1945            let position = editor
1946                .read(cx)
1947                .buffer()
1948                .read(cx)
1949                .read(cx)
1950                .anchor_before(Point::new(7, 0));
1951            editor.update(cx, |editor, cx| {
1952                let snapshot = editor.buffer().read(cx).snapshot(cx);
1953                keep_edits_in_ranges(
1954                    editor,
1955                    &snapshot,
1956                    &thread,
1957                    vec![position..position],
1958                    window,
1959                    cx,
1960                )
1961            });
1962        });
1963        cx.run_until_parked();
1964        assert_eq!(
1965            editor.read_with(cx, |editor, cx| editor.text(cx)),
1966            "abc\ndEf\nghi\njkl\njkL\nmno\nPqr\nstu\nvwx\nyz"
1967        );
1968        assert_eq!(
1969            editor
1970                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
1971                .range(),
1972            Point::new(3, 0)..Point::new(3, 0)
1973        );
1974    }
1975
1976    #[gpui::test]
1977    async fn test_singleton_agent_diff(cx: &mut TestAppContext) {
1978        cx.update(|cx| {
1979            let settings_store = SettingsStore::test(cx);
1980            cx.set_global(settings_store);
1981            language::init(cx);
1982            Project::init_settings(cx);
1983            AgentSettings::register(cx);
1984            prompt_store::init(cx);
1985            workspace::init_settings(cx);
1986            ThemeSettings::register(cx);
1987            EditorSettings::register(cx);
1988            language_model::init_settings(cx);
1989            workspace::register_project_item::<Editor>(cx);
1990        });
1991
1992        let fs = FakeFs::new(cx.executor());
1993        fs.insert_tree(
1994            path!("/test"),
1995            json!({"file1": "abc\ndef\nghi\njkl\nmno\npqr\nstu\nvwx\nyz"}),
1996        )
1997        .await;
1998        fs.insert_tree(path!("/test"), json!({"file2": "abc\ndef\nghi"}))
1999            .await;
2000
2001        let project = Project::test(fs, [path!("/test").as_ref()], cx).await;
2002        let buffer_path1 = project
2003            .read_with(cx, |project, cx| {
2004                project.find_project_path("test/file1", cx)
2005            })
2006            .unwrap();
2007        let buffer_path2 = project
2008            .read_with(cx, |project, cx| {
2009                project.find_project_path("test/file2", cx)
2010            })
2011            .unwrap();
2012
2013        let (workspace, cx) =
2014            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
2015
2016        // Add the diff toolbar to the active pane
2017        let diff_toolbar = cx.new_window_entity(|_, cx| AgentDiffToolbar::new(cx));
2018
2019        workspace.update_in(cx, {
2020            let diff_toolbar = diff_toolbar.clone();
2021
2022            move |workspace, window, cx| {
2023                workspace.active_pane().update(cx, |pane, cx| {
2024                    pane.toolbar().update(cx, |toolbar, cx| {
2025                        toolbar.add_item(diff_toolbar, window, cx);
2026                    });
2027                })
2028            }
2029        });
2030
2031        let connection = Rc::new(acp_thread::StubAgentConnection::new());
2032        let thread = cx
2033            .update(|_, cx| {
2034                connection
2035                    .clone()
2036                    .new_thread(project.clone(), Path::new(path!("/test")), cx)
2037            })
2038            .await
2039            .unwrap();
2040        let action_log = thread.read_with(cx, |thread, _| thread.action_log().clone());
2041
2042        // Set the active thread
2043        let thread = AgentDiffThread::AcpThread(thread);
2044        cx.update(|window, cx| {
2045            AgentDiff::set_active_thread(&workspace.downgrade(), thread.clone(), window, cx)
2046        });
2047
2048        let buffer1 = project
2049            .update(cx, |project, cx| {
2050                project.open_buffer(buffer_path1.clone(), cx)
2051            })
2052            .await
2053            .unwrap();
2054        let buffer2 = project
2055            .update(cx, |project, cx| {
2056                project.open_buffer(buffer_path2.clone(), cx)
2057            })
2058            .await
2059            .unwrap();
2060
2061        // Open an editor for buffer1
2062        let editor1 = cx.new_window_entity(|window, cx| {
2063            Editor::for_buffer(buffer1.clone(), Some(project.clone()), window, cx)
2064        });
2065
2066        workspace.update_in(cx, |workspace, window, cx| {
2067            workspace.add_item_to_active_pane(Box::new(editor1.clone()), None, true, window, cx);
2068        });
2069        cx.run_until_parked();
2070
2071        // Toolbar knows about the current editor, but it's hidden since there are no changes yet
2072        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2073            toolbar.active_item,
2074            Some(AgentDiffToolbarItem::Editor {
2075                state: EditorState::Idle,
2076                ..
2077            })
2078        )));
2079        assert_eq!(
2080            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2081            ToolbarItemLocation::Hidden
2082        );
2083
2084        // Make changes
2085        cx.update(|_, cx| {
2086            action_log.update(cx, |log, cx| log.buffer_read(buffer1.clone(), cx));
2087            buffer1.update(cx, |buffer, cx| {
2088                buffer
2089                    .edit(
2090                        [
2091                            (Point::new(1, 1)..Point::new(1, 2), "E"),
2092                            (Point::new(3, 2)..Point::new(3, 3), "L"),
2093                            (Point::new(5, 0)..Point::new(5, 1), "P"),
2094                            (Point::new(7, 1)..Point::new(7, 2), "W"),
2095                        ],
2096                        None,
2097                        cx,
2098                    )
2099                    .unwrap()
2100            });
2101            action_log.update(cx, |log, cx| log.buffer_edited(buffer1.clone(), cx));
2102
2103            action_log.update(cx, |log, cx| log.buffer_read(buffer2.clone(), cx));
2104            buffer2.update(cx, |buffer, cx| {
2105                buffer
2106                    .edit(
2107                        [
2108                            (Point::new(0, 0)..Point::new(0, 1), "A"),
2109                            (Point::new(2, 1)..Point::new(2, 2), "H"),
2110                        ],
2111                        None,
2112                        cx,
2113                    )
2114                    .unwrap();
2115            });
2116            action_log.update(cx, |log, cx| log.buffer_edited(buffer2.clone(), cx));
2117        });
2118        cx.run_until_parked();
2119
2120        // The already opened editor displays the diff and the cursor is at the first hunk
2121        assert_eq!(
2122            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2123            "abc\ndef\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
2124        );
2125        assert_eq!(
2126            editor1
2127                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
2128                .range(),
2129            Point::new(1, 0)..Point::new(1, 0)
2130        );
2131
2132        // The toolbar is displayed in the right state
2133        assert_eq!(
2134            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2135            ToolbarItemLocation::PrimaryRight
2136        );
2137        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2138            toolbar.active_item,
2139            Some(AgentDiffToolbarItem::Editor {
2140                state: EditorState::Reviewing,
2141                ..
2142            })
2143        )));
2144
2145        // The toolbar respects its setting
2146        override_toolbar_agent_review_setting(false, cx);
2147        assert_eq!(
2148            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2149            ToolbarItemLocation::Hidden
2150        );
2151        override_toolbar_agent_review_setting(true, cx);
2152        assert_eq!(
2153            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2154            ToolbarItemLocation::PrimaryRight
2155        );
2156
2157        // After keeping a hunk, the cursor should be positioned on the second hunk.
2158        workspace.update(cx, |_, cx| {
2159            cx.dispatch_action(&Keep);
2160        });
2161        cx.run_until_parked();
2162        assert_eq!(
2163            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2164            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
2165        );
2166        assert_eq!(
2167            editor1
2168                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
2169                .range(),
2170            Point::new(3, 0)..Point::new(3, 0)
2171        );
2172
2173        // Rejecting a hunk also moves the cursor to the next hunk, possibly cycling if it's at the end.
2174        editor1.update_in(cx, |editor, window, cx| {
2175            editor.change_selections(SelectionEffects::no_scroll(), window, cx, |selections| {
2176                selections.select_ranges([Point::new(10, 0)..Point::new(10, 0)])
2177            });
2178        });
2179        workspace.update(cx, |_, cx| {
2180            cx.dispatch_action(&Reject);
2181        });
2182        cx.run_until_parked();
2183        assert_eq!(
2184            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2185            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nyz"
2186        );
2187        assert_eq!(
2188            editor1
2189                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
2190                .range(),
2191            Point::new(3, 0)..Point::new(3, 0)
2192        );
2193
2194        // Keeping a range that doesn't intersect the current selection doesn't move it.
2195        editor1.update_in(cx, |editor, window, cx| {
2196            let buffer = editor.buffer().read(cx);
2197            let position = buffer.read(cx).anchor_before(Point::new(7, 0));
2198            let snapshot = buffer.snapshot(cx);
2199            keep_edits_in_ranges(
2200                editor,
2201                &snapshot,
2202                &thread,
2203                vec![position..position],
2204                window,
2205                cx,
2206            )
2207        });
2208        cx.run_until_parked();
2209        assert_eq!(
2210            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2211            "abc\ndEf\nghi\njkl\njkL\nmno\nPqr\nstu\nvwx\nyz"
2212        );
2213        assert_eq!(
2214            editor1
2215                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
2216                .range(),
2217            Point::new(3, 0)..Point::new(3, 0)
2218        );
2219
2220        // Reviewing the last change opens the next changed buffer
2221        workspace
2222            .update_in(cx, |workspace, window, cx| {
2223                AgentDiff::global(cx).update(cx, |agent_diff, cx| {
2224                    agent_diff.review_in_active_editor(workspace, AgentDiff::keep, window, cx)
2225                })
2226            })
2227            .unwrap()
2228            .await
2229            .unwrap();
2230
2231        cx.run_until_parked();
2232
2233        let editor2 = workspace.update(cx, |workspace, cx| {
2234            workspace.active_item_as::<Editor>(cx).unwrap()
2235        });
2236
2237        let editor2_path = editor2
2238            .read_with(cx, |editor, cx| editor.project_path(cx))
2239            .unwrap();
2240        assert_eq!(editor2_path, buffer_path2);
2241
2242        assert_eq!(
2243            editor2.read_with(cx, |editor, cx| editor.text(cx)),
2244            "abc\nAbc\ndef\nghi\ngHi"
2245        );
2246        assert_eq!(
2247            editor2
2248                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
2249                .range(),
2250            Point::new(0, 0)..Point::new(0, 0)
2251        );
2252
2253        // Editor 1 toolbar is hidden since all changes have been reviewed
2254        workspace.update_in(cx, |workspace, window, cx| {
2255            workspace.activate_item(&editor1, true, true, window, cx)
2256        });
2257
2258        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2259            toolbar.active_item,
2260            Some(AgentDiffToolbarItem::Editor {
2261                state: EditorState::Idle,
2262                ..
2263            })
2264        )));
2265        assert_eq!(
2266            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2267            ToolbarItemLocation::Hidden
2268        );
2269    }
2270
2271    fn override_toolbar_agent_review_setting(active: bool, cx: &mut VisualTestContext) {
2272        cx.update(|_window, cx| {
2273            SettingsStore::update_global(cx, |store, _cx| {
2274                let mut editor_settings = store.get::<EditorSettings>(None).clone();
2275                editor_settings.toolbar.agent_review = active;
2276                store.override_global(editor_settings);
2277            })
2278        });
2279        cx.run_until_parked();
2280    }
2281}