1use crate::{Keep, KeepAll, OpenAgentDiff, Reject, RejectAll};
   2use agent::{ThreadEvent, ZedAgentThread};
   3use agent_settings::AgentSettings;
   4use anyhow::Result;
   5use assistant_tool::ActionLog;
   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    scroll::Autoscroll,
  13};
  14use gpui::{
  15    Action, Animation, AnimationExt, AnyElement, AnyView, App, AppContext, Empty, Entity,
  16    EventEmitter, FocusHandle, Focusable, Global, SharedString, Subscription, Task, Transformation,
  17    WeakEntity, Window, percentage, prelude::*,
  18};
  19
  20use language::{Buffer, Capability, DiskState, OffsetRangeExt, Point};
  21use language_model::StopReason;
  22use multi_buffer::PathKey;
  23use project::{Project, ProjectItem, ProjectPath};
  24use settings::{Settings, SettingsStore};
  25use std::{
  26    any::{Any, TypeId},
  27    collections::hash_map::Entry,
  28    ops::Range,
  29    sync::Arc,
  30    time::Duration,
  31};
  32use ui::{IconButtonShape, KeyBinding, Tooltip, prelude::*, vertical_divider};
  33use util::ResultExt;
  34use workspace::{
  35    Item, ItemHandle, ItemNavHistory, ToolbarItemEvent, ToolbarItemLocation, ToolbarItemView,
  36    Workspace,
  37    item::{BreadcrumbText, ItemEvent, SaveOptions, TabContentParams},
  38    searchable::SearchableItemHandle,
  39};
  40use zed_actions::assistant::ToggleFocus;
  41
  42pub struct AgentDiffPane {
  43    multibuffer: Entity<MultiBuffer>,
  44    editor: Entity<Editor>,
  45    agent: Entity<ZedAgentThread>,
  46    action_log: Entity<ActionLog>,
  47    focus_handle: FocusHandle,
  48    workspace: WeakEntity<Workspace>,
  49    title: SharedString,
  50    _subscriptions: Vec<Subscription>,
  51}
  52
  53impl AgentDiffPane {
  54    pub fn deploy(
  55        agent: Entity<ZedAgentThread>,
  56        workspace: WeakEntity<Workspace>,
  57        window: &mut Window,
  58        cx: &mut App,
  59    ) -> Result<Entity<Self>> {
  60        workspace.update(cx, |workspace, cx| {
  61            Self::deploy_in_workspace(agent, workspace, window, cx)
  62        })
  63    }
  64
  65    pub fn deploy_in_workspace(
  66        agent: Entity<ZedAgentThread>,
  67        workspace: &mut Workspace,
  68        window: &mut Window,
  69        cx: &mut Context<Workspace>,
  70    ) -> Entity<Self> {
  71        let existing_diff = workspace
  72            .items_of_type::<AgentDiffPane>(cx)
  73            .find(|diff| diff.read(cx).agent == agent);
  74        if let Some(existing_diff) = existing_diff {
  75            workspace.activate_item(&existing_diff, true, true, window, cx);
  76            existing_diff
  77        } else {
  78            let agent_diff =
  79                cx.new(|cx| AgentDiffPane::new(agent.clone(), workspace.weak_handle(), window, cx));
  80            workspace.add_item_to_center(Box::new(agent_diff.clone()), window, cx);
  81            agent_diff
  82        }
  83    }
  84
  85    pub fn new(
  86        agent: Entity<ZedAgentThread>,
  87        workspace: WeakEntity<Workspace>,
  88        window: &mut Window,
  89        cx: &mut Context<Self>,
  90    ) -> Self {
  91        let focus_handle = cx.focus_handle();
  92        let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
  93        let action_log = agent.read(cx).action_log();
  94        let project = agent.read(cx).project().clone();
  95
  96        let editor = cx.new(|cx| {
  97            let mut editor =
  98                Editor::for_multibuffer(multibuffer.clone(), Some(project.clone()), window, cx);
  99            editor.disable_inline_diagnostics();
 100            editor.set_expand_all_diff_hunks(cx);
 101            editor.set_render_diff_hunk_controls(diff_hunk_controls(&action_log), cx);
 102            editor.register_addon(AgentDiffAddon);
 103            editor
 104        });
 105
 106        let mut this = Self {
 107            _subscriptions: vec![
 108                cx.observe_in(&action_log, window, |this, _action_log, window, cx| {
 109                    this.update_excerpts(window, cx)
 110                }),
 111                cx.subscribe(&agent, |this, _thread, event, cx| {
 112                    this.handle_thread_event(event, cx)
 113                }),
 114            ],
 115            title: SharedString::default(),
 116            action_log,
 117            multibuffer,
 118            editor,
 119            agent,
 120            focus_handle,
 121            workspace,
 122        };
 123        this.update_excerpts(window, cx);
 124        this.update_title(cx);
 125        this
 126    }
 127
 128    fn update_excerpts(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 129        let agent = self.agent.read(cx);
 130        let changed_buffers = agent.action_log().read(cx).changed_buffers(cx);
 131        let mut paths_to_delete = self.multibuffer.read(cx).paths().collect::<HashSet<_>>();
 132
 133        for (buffer, diff_handle) in changed_buffers {
 134            if buffer.read(cx).file().is_none() {
 135                continue;
 136            }
 137
 138            let path_key = PathKey::for_buffer(&buffer, cx);
 139            paths_to_delete.remove(&path_key);
 140
 141            let snapshot = buffer.read(cx).snapshot();
 142            let diff = diff_handle.read(cx);
 143
 144            let diff_hunk_ranges = diff
 145                .hunks_intersecting_range(
 146                    language::Anchor::MIN..language::Anchor::MAX,
 147                    &snapshot,
 148                    cx,
 149                )
 150                .map(|diff_hunk| diff_hunk.buffer_range.to_point(&snapshot))
 151                .collect::<Vec<_>>();
 152
 153            let (was_empty, is_excerpt_newly_added) =
 154                self.multibuffer.update(cx, |multibuffer, cx| {
 155                    let was_empty = multibuffer.is_empty();
 156                    let (_, is_excerpt_newly_added) = multibuffer.set_excerpts_for_path(
 157                        path_key.clone(),
 158                        buffer.clone(),
 159                        diff_hunk_ranges,
 160                        editor::DEFAULT_MULTIBUFFER_CONTEXT,
 161                        cx,
 162                    );
 163                    multibuffer.add_diff(diff_handle, cx);
 164                    (was_empty, is_excerpt_newly_added)
 165                });
 166
 167            self.editor.update(cx, |editor, cx| {
 168                if was_empty {
 169                    let first_hunk = editor
 170                        .diff_hunks_in_ranges(
 171                            &[editor::Anchor::min()..editor::Anchor::max()],
 172                            &self.multibuffer.read(cx).read(cx),
 173                        )
 174                        .next();
 175
 176                    if let Some(first_hunk) = first_hunk {
 177                        let first_hunk_start = first_hunk.multi_buffer_range().start;
 178                        editor.change_selections(Default::default(), window, cx, |selections| {
 179                            selections.select_anchor_ranges([first_hunk_start..first_hunk_start]);
 180                        })
 181                    }
 182                }
 183
 184                if is_excerpt_newly_added
 185                    && buffer
 186                        .read(cx)
 187                        .file()
 188                        .map_or(false, |file| file.disk_state() == DiskState::Deleted)
 189                {
 190                    editor.fold_buffer(snapshot.text.remote_id(), cx)
 191                }
 192            });
 193        }
 194
 195        self.multibuffer.update(cx, |multibuffer, cx| {
 196            for path in paths_to_delete {
 197                multibuffer.remove_excerpts_for_path(path, cx);
 198            }
 199        });
 200
 201        if self.multibuffer.read(cx).is_empty()
 202            && self
 203                .editor
 204                .read(cx)
 205                .focus_handle(cx)
 206                .contains_focused(window, cx)
 207        {
 208            self.focus_handle.focus(window);
 209        } else if self.focus_handle.is_focused(window) && !self.multibuffer.read(cx).is_empty() {
 210            self.editor.update(cx, |editor, cx| {
 211                editor.focus_handle(cx).focus(window);
 212            });
 213        }
 214    }
 215
 216    fn update_title(&mut self, cx: &mut Context<Self>) {
 217        let new_title = self.agent.read(cx).summary().unwrap_or("Agent Changes");
 218        if new_title != self.title {
 219            self.title = new_title;
 220            cx.emit(EditorEvent::TitleChanged);
 221        }
 222    }
 223
 224    fn handle_thread_event(&mut self, event: &ThreadEvent, cx: &mut Context<Self>) {
 225        match event {
 226            ThreadEvent::SummaryGenerated => self.update_title(cx),
 227            _ => {}
 228        }
 229    }
 230
 231    pub fn move_to_path(&self, path_key: PathKey, window: &mut Window, cx: &mut App) {
 232        if let Some(position) = self.multibuffer.read(cx).location_for_path(&path_key, cx) {
 233            self.editor.update(cx, |editor, cx| {
 234                let first_hunk = editor
 235                    .diff_hunks_in_ranges(
 236                        &[position..editor::Anchor::max()],
 237                        &self.multibuffer.read(cx).read(cx),
 238                    )
 239                    .next();
 240
 241                if let Some(first_hunk) = first_hunk {
 242                    let first_hunk_start = first_hunk.multi_buffer_range().start;
 243                    editor.change_selections(Default::default(), window, cx, |selections| {
 244                        selections.select_anchor_ranges([first_hunk_start..first_hunk_start]);
 245                    })
 246                }
 247            });
 248        }
 249    }
 250
 251    fn keep(&mut self, _: &Keep, window: &mut Window, cx: &mut Context<Self>) {
 252        self.editor.update(cx, |editor, cx| {
 253            let snapshot = editor.buffer().read(cx).snapshot(cx);
 254            keep_edits_in_selection(editor, &snapshot, &self.action_log, window, cx);
 255        });
 256    }
 257
 258    fn reject(&mut self, _: &Reject, window: &mut Window, cx: &mut Context<Self>) {
 259        self.editor.update(cx, |editor, cx| {
 260            let snapshot = editor.buffer().read(cx).snapshot(cx);
 261            reject_edits_in_selection(editor, &snapshot, &self.action_log, window, cx);
 262        });
 263    }
 264
 265    fn reject_all(&mut self, _: &RejectAll, window: &mut Window, cx: &mut Context<Self>) {
 266        self.editor.update(cx, |editor, cx| {
 267            let snapshot = editor.buffer().read(cx).snapshot(cx);
 268            reject_edits_in_ranges(
 269                editor,
 270                &snapshot,
 271                &self.action_log,
 272                vec![editor::Anchor::min()..editor::Anchor::max()],
 273                window,
 274                cx,
 275            );
 276        });
 277    }
 278
 279    fn keep_all(&mut self, _: &KeepAll, _window: &mut Window, cx: &mut Context<Self>) {
 280        self.action_log
 281            .update(cx, |action_log, cx| action_log.keep_all_edits(cx));
 282    }
 283}
 284
 285fn keep_edits_in_selection(
 286    editor: &mut Editor,
 287    buffer_snapshot: &MultiBufferSnapshot,
 288    action_log: &Entity<ActionLog>,
 289    window: &mut Window,
 290    cx: &mut Context<Editor>,
 291) {
 292    let ranges = editor
 293        .selections
 294        .disjoint_anchor_ranges()
 295        .collect::<Vec<_>>();
 296
 297    keep_edits_in_ranges(editor, buffer_snapshot, &action_log, ranges, window, cx)
 298}
 299
 300fn reject_edits_in_selection(
 301    editor: &mut Editor,
 302    buffer_snapshot: &MultiBufferSnapshot,
 303    action_log: &Entity<ActionLog>,
 304    window: &mut Window,
 305    cx: &mut Context<Editor>,
 306) {
 307    let ranges = editor
 308        .selections
 309        .disjoint_anchor_ranges()
 310        .collect::<Vec<_>>();
 311    reject_edits_in_ranges(editor, buffer_snapshot, &action_log, ranges, window, cx)
 312}
 313
 314fn keep_edits_in_ranges(
 315    editor: &mut Editor,
 316    buffer_snapshot: &MultiBufferSnapshot,
 317    action_log: &Entity<ActionLog>,
 318    ranges: Vec<Range<editor::Anchor>>,
 319    window: &mut Window,
 320    cx: &mut Context<Editor>,
 321) {
 322    let diff_hunks_in_ranges = editor
 323        .diff_hunks_in_ranges(&ranges, buffer_snapshot)
 324        .collect::<Vec<_>>();
 325
 326    update_editor_selection(editor, buffer_snapshot, &diff_hunks_in_ranges, window, cx);
 327
 328    let multibuffer = editor.buffer().clone();
 329    for hunk in &diff_hunks_in_ranges {
 330        let buffer = multibuffer.read(cx).buffer(hunk.buffer_id);
 331        if let Some(buffer) = buffer {
 332            action_log.update(cx, |action_log, cx| {
 333                action_log.keep_edits_in_range(buffer, hunk.buffer_range.clone(), cx)
 334            });
 335        }
 336    }
 337}
 338
 339fn reject_edits_in_ranges(
 340    editor: &mut Editor,
 341    buffer_snapshot: &MultiBufferSnapshot,
 342    action_log: &Entity<ActionLog>,
 343    ranges: Vec<Range<editor::Anchor>>,
 344    window: &mut Window,
 345    cx: &mut Context<Editor>,
 346) {
 347    let diff_hunks_in_ranges = editor
 348        .diff_hunks_in_ranges(&ranges, buffer_snapshot)
 349        .collect::<Vec<_>>();
 350
 351    update_editor_selection(editor, buffer_snapshot, &diff_hunks_in_ranges, window, cx);
 352
 353    let multibuffer = editor.buffer().clone();
 354
 355    let mut ranges_by_buffer = HashMap::default();
 356    for hunk in &diff_hunks_in_ranges {
 357        let buffer = multibuffer.read(cx).buffer(hunk.buffer_id);
 358        if let Some(buffer) = buffer {
 359            ranges_by_buffer
 360                .entry(buffer.clone())
 361                .or_insert_with(Vec::new)
 362                .push(hunk.buffer_range.clone());
 363        }
 364    }
 365
 366    for (buffer, ranges) in ranges_by_buffer {
 367        action_log
 368            .update(cx, |action_log, cx| {
 369                action_log.reject_edits_in_ranges(buffer, ranges, cx)
 370            })
 371            .detach_and_log_err(cx);
 372    }
 373}
 374
 375fn update_editor_selection(
 376    editor: &mut Editor,
 377    buffer_snapshot: &MultiBufferSnapshot,
 378    diff_hunks: &[multi_buffer::MultiBufferDiffHunk],
 379    window: &mut Window,
 380    cx: &mut Context<Editor>,
 381) {
 382    let newest_cursor = editor.selections.newest::<Point>(cx).head();
 383
 384    if !diff_hunks.iter().any(|hunk| {
 385        hunk.row_range
 386            .contains(&multi_buffer::MultiBufferRow(newest_cursor.row))
 387    }) {
 388        return;
 389    }
 390
 391    let target_hunk = {
 392        diff_hunks
 393            .last()
 394            .and_then(|last_kept_hunk| {
 395                let last_kept_hunk_end = last_kept_hunk.multi_buffer_range().end;
 396                editor
 397                    .diff_hunks_in_ranges(
 398                        &[last_kept_hunk_end..editor::Anchor::max()],
 399                        buffer_snapshot,
 400                    )
 401                    .skip(1)
 402                    .next()
 403            })
 404            .or_else(|| {
 405                let first_kept_hunk = diff_hunks.first()?;
 406                let first_kept_hunk_start = first_kept_hunk.multi_buffer_range().start;
 407                editor
 408                    .diff_hunks_in_ranges(
 409                        &[editor::Anchor::min()..first_kept_hunk_start],
 410                        buffer_snapshot,
 411                    )
 412                    .next()
 413            })
 414    };
 415
 416    if let Some(target_hunk) = target_hunk {
 417        editor.change_selections(Default::default(), window, cx, |selections| {
 418            let next_hunk_start = target_hunk.multi_buffer_range().start;
 419            selections.select_anchor_ranges([next_hunk_start..next_hunk_start]);
 420        })
 421    }
 422}
 423
 424impl EventEmitter<EditorEvent> for AgentDiffPane {}
 425
 426impl Focusable for AgentDiffPane {
 427    fn focus_handle(&self, cx: &App) -> FocusHandle {
 428        if self.multibuffer.read(cx).is_empty() {
 429            self.focus_handle.clone()
 430        } else {
 431            self.editor.focus_handle(cx)
 432        }
 433    }
 434}
 435
 436impl Item for AgentDiffPane {
 437    type Event = EditorEvent;
 438
 439    fn tab_icon(&self, _window: &Window, _cx: &App) -> Option<Icon> {
 440        Some(Icon::new(IconName::ZedAssistant).color(Color::Muted))
 441    }
 442
 443    fn to_item_events(event: &EditorEvent, f: impl FnMut(ItemEvent)) {
 444        Editor::to_item_events(event, f)
 445    }
 446
 447    fn deactivated(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 448        self.editor
 449            .update(cx, |editor, cx| editor.deactivated(window, cx));
 450    }
 451
 452    fn navigate(
 453        &mut self,
 454        data: Box<dyn Any>,
 455        window: &mut Window,
 456        cx: &mut Context<Self>,
 457    ) -> bool {
 458        self.editor
 459            .update(cx, |editor, cx| editor.navigate(data, window, cx))
 460    }
 461
 462    fn tab_tooltip_text(&self, _: &App) -> Option<SharedString> {
 463        Some("Agent Diff".into())
 464    }
 465
 466    fn tab_content(&self, params: TabContentParams, _window: &Window, cx: &App) -> AnyElement {
 467        let summary = self.agent.read(cx).summary().or_default();
 468        Label::new(format!("Review: {}", summary))
 469            .color(if params.selected {
 470                Color::Default
 471            } else {
 472                Color::Muted
 473            })
 474            .into_any_element()
 475    }
 476
 477    fn telemetry_event_text(&self) -> Option<&'static str> {
 478        Some("Assistant Diff Opened")
 479    }
 480
 481    fn as_searchable(&self, _: &Entity<Self>) -> Option<Box<dyn SearchableItemHandle>> {
 482        Some(Box::new(self.editor.clone()))
 483    }
 484
 485    fn for_each_project_item(
 486        &self,
 487        cx: &App,
 488        f: &mut dyn FnMut(gpui::EntityId, &dyn project::ProjectItem),
 489    ) {
 490        self.editor.for_each_project_item(cx, f)
 491    }
 492
 493    fn is_singleton(&self, _: &App) -> bool {
 494        false
 495    }
 496
 497    fn set_nav_history(
 498        &mut self,
 499        nav_history: ItemNavHistory,
 500        _: &mut Window,
 501        cx: &mut Context<Self>,
 502    ) {
 503        self.editor.update(cx, |editor, _| {
 504            editor.set_nav_history(Some(nav_history));
 505        });
 506    }
 507
 508    fn clone_on_split(
 509        &self,
 510        _workspace_id: Option<workspace::WorkspaceId>,
 511        window: &mut Window,
 512        cx: &mut Context<Self>,
 513    ) -> Option<Entity<Self>>
 514    where
 515        Self: Sized,
 516    {
 517        Some(cx.new(|cx| Self::new(self.agent.clone(), self.workspace.clone(), window, cx)))
 518    }
 519
 520    fn is_dirty(&self, cx: &App) -> bool {
 521        self.multibuffer.read(cx).is_dirty(cx)
 522    }
 523
 524    fn has_conflict(&self, cx: &App) -> bool {
 525        self.multibuffer.read(cx).has_conflict(cx)
 526    }
 527
 528    fn can_save(&self, _: &App) -> bool {
 529        true
 530    }
 531
 532    fn save(
 533        &mut self,
 534        options: SaveOptions,
 535        project: Entity<Project>,
 536        window: &mut Window,
 537        cx: &mut Context<Self>,
 538    ) -> Task<Result<()>> {
 539        self.editor.save(options, project, window, cx)
 540    }
 541
 542    fn save_as(
 543        &mut self,
 544        _: Entity<Project>,
 545        _: ProjectPath,
 546        _window: &mut Window,
 547        _: &mut Context<Self>,
 548    ) -> Task<Result<()>> {
 549        unreachable!()
 550    }
 551
 552    fn reload(
 553        &mut self,
 554        project: Entity<Project>,
 555        window: &mut Window,
 556        cx: &mut Context<Self>,
 557    ) -> Task<Result<()>> {
 558        self.editor.reload(project, window, cx)
 559    }
 560
 561    fn act_as_type<'a>(
 562        &'a self,
 563        type_id: TypeId,
 564        self_handle: &'a Entity<Self>,
 565        _: &'a App,
 566    ) -> Option<AnyView> {
 567        if type_id == TypeId::of::<Self>() {
 568            Some(self_handle.to_any())
 569        } else if type_id == TypeId::of::<Editor>() {
 570            Some(self.editor.to_any())
 571        } else {
 572            None
 573        }
 574    }
 575
 576    fn breadcrumb_location(&self, _: &App) -> ToolbarItemLocation {
 577        ToolbarItemLocation::PrimaryLeft
 578    }
 579
 580    fn breadcrumbs(&self, theme: &theme::Theme, cx: &App) -> Option<Vec<BreadcrumbText>> {
 581        self.editor.breadcrumbs(theme, cx)
 582    }
 583
 584    fn added_to_workspace(
 585        &mut self,
 586        workspace: &mut Workspace,
 587        window: &mut Window,
 588        cx: &mut Context<Self>,
 589    ) {
 590        self.editor.update(cx, |editor, cx| {
 591            editor.added_to_workspace(workspace, window, cx)
 592        });
 593    }
 594
 595    fn tab_content_text(&self, _detail: usize, _cx: &App) -> SharedString {
 596        "Agent Diff".into()
 597    }
 598}
 599
 600impl Render for AgentDiffPane {
 601    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
 602        let is_empty = self.multibuffer.read(cx).is_empty();
 603        let focus_handle = &self.focus_handle;
 604
 605        div()
 606            .track_focus(focus_handle)
 607            .key_context(if is_empty { "EmptyPane" } else { "AgentDiff" })
 608            .on_action(cx.listener(Self::keep))
 609            .on_action(cx.listener(Self::reject))
 610            .on_action(cx.listener(Self::reject_all))
 611            .on_action(cx.listener(Self::keep_all))
 612            .bg(cx.theme().colors().editor_background)
 613            .flex()
 614            .items_center()
 615            .justify_center()
 616            .size_full()
 617            .when(is_empty, |el| {
 618                el.child(
 619                    v_flex()
 620                        .items_center()
 621                        .gap_2()
 622                        .child("No changes to review")
 623                        .child(
 624                            Button::new("continue-iterating", "Continue Iterating")
 625                                .style(ButtonStyle::Filled)
 626                                .icon(IconName::ForwardArrow)
 627                                .icon_position(IconPosition::Start)
 628                                .icon_size(IconSize::Small)
 629                                .icon_color(Color::Muted)
 630                                .full_width()
 631                                .key_binding(KeyBinding::for_action_in(
 632                                    &ToggleFocus,
 633                                    &focus_handle.clone(),
 634                                    window,
 635                                    cx,
 636                                ))
 637                                .on_click(|_event, window, cx| {
 638                                    window.dispatch_action(ToggleFocus.boxed_clone(), cx)
 639                                }),
 640                        ),
 641                )
 642            })
 643            .when(!is_empty, |el| el.child(self.editor.clone()))
 644    }
 645}
 646
 647fn diff_hunk_controls(action_log: &Entity<ActionLog>) -> editor::RenderDiffHunkControlsFn {
 648    let action_log = action_log.clone();
 649
 650    Arc::new(
 651        move |row,
 652              status: &DiffHunkStatus,
 653              hunk_range,
 654              is_created_file,
 655              line_height,
 656              editor: &Entity<Editor>,
 657              window: &mut Window,
 658              cx: &mut App| {
 659            {
 660                render_diff_hunk_controls(
 661                    row,
 662                    status,
 663                    hunk_range,
 664                    is_created_file,
 665                    line_height,
 666                    &action_log,
 667                    editor,
 668                    window,
 669                    cx,
 670                )
 671            }
 672        },
 673    )
 674}
 675
 676fn render_diff_hunk_controls(
 677    row: u32,
 678    _status: &DiffHunkStatus,
 679    hunk_range: Range<editor::Anchor>,
 680    is_created_file: bool,
 681    line_height: Pixels,
 682    action_log: &Entity<ActionLog>,
 683    editor: &Entity<Editor>,
 684    window: &mut Window,
 685    cx: &mut App,
 686) -> AnyElement {
 687    let editor = editor.clone();
 688
 689    h_flex()
 690        .h(line_height)
 691        .mr_0p5()
 692        .gap_1()
 693        .px_0p5()
 694        .pb_1()
 695        .border_x_1()
 696        .border_b_1()
 697        .border_color(cx.theme().colors().border)
 698        .rounded_b_md()
 699        .bg(cx.theme().colors().editor_background)
 700        .gap_1()
 701        .block_mouse_except_scroll()
 702        .shadow_md()
 703        .children(vec![
 704            Button::new(("reject", row as u64), "Reject")
 705                .disabled(is_created_file)
 706                .key_binding(
 707                    KeyBinding::for_action_in(
 708                        &Reject,
 709                        &editor.read(cx).focus_handle(cx),
 710                        window,
 711                        cx,
 712                    )
 713                    .map(|kb| kb.size(rems_from_px(12.))),
 714                )
 715                .on_click({
 716                    let editor = editor.clone();
 717                    let action_log = action_log.clone();
 718                    move |_event, window, cx| {
 719                        editor.update(cx, |editor, cx| {
 720                            let snapshot = editor.buffer().read(cx).snapshot(cx);
 721                            reject_edits_in_ranges(
 722                                editor,
 723                                &snapshot,
 724                                &action_log,
 725                                vec![hunk_range.start..hunk_range.start],
 726                                window,
 727                                cx,
 728                            );
 729                        })
 730                    }
 731                }),
 732            Button::new(("keep", row as u64), "Keep")
 733                .key_binding(
 734                    KeyBinding::for_action_in(&Keep, &editor.read(cx).focus_handle(cx), window, cx)
 735                        .map(|kb| kb.size(rems_from_px(12.))),
 736                )
 737                .on_click({
 738                    let editor = editor.clone();
 739                    let action_log = action_log.clone();
 740                    move |_event, window, cx| {
 741                        editor.update(cx, |editor, cx| {
 742                            let snapshot = editor.buffer().read(cx).snapshot(cx);
 743                            keep_edits_in_ranges(
 744                                editor,
 745                                &snapshot,
 746                                &action_log,
 747                                vec![hunk_range.start..hunk_range.start],
 748                                window,
 749                                cx,
 750                            );
 751                        });
 752                    }
 753                }),
 754        ])
 755        .when(
 756            !editor.read(cx).buffer().read(cx).all_diff_hunks_expanded(),
 757            |el| {
 758                el.child(
 759                    IconButton::new(("next-hunk", row as u64), IconName::ArrowDown)
 760                        .shape(IconButtonShape::Square)
 761                        .icon_size(IconSize::Small)
 762                        // .disabled(!has_multiple_hunks)
 763                        .tooltip({
 764                            let focus_handle = editor.focus_handle(cx);
 765                            move |window, cx| {
 766                                Tooltip::for_action_in(
 767                                    "Next Hunk",
 768                                    &GoToHunk,
 769                                    &focus_handle,
 770                                    window,
 771                                    cx,
 772                                )
 773                            }
 774                        })
 775                        .on_click({
 776                            let editor = editor.clone();
 777                            move |_event, window, cx| {
 778                                editor.update(cx, |editor, cx| {
 779                                    let snapshot = editor.snapshot(window, cx);
 780                                    let position =
 781                                        hunk_range.end.to_point(&snapshot.buffer_snapshot);
 782                                    editor.go_to_hunk_before_or_after_position(
 783                                        &snapshot,
 784                                        position,
 785                                        Direction::Next,
 786                                        window,
 787                                        cx,
 788                                    );
 789                                    editor.expand_selected_diff_hunks(cx);
 790                                });
 791                            }
 792                        }),
 793                )
 794                .child(
 795                    IconButton::new(("prev-hunk", row as u64), IconName::ArrowUp)
 796                        .shape(IconButtonShape::Square)
 797                        .icon_size(IconSize::Small)
 798                        // .disabled(!has_multiple_hunks)
 799                        .tooltip({
 800                            let focus_handle = editor.focus_handle(cx);
 801                            move |window, cx| {
 802                                Tooltip::for_action_in(
 803                                    "Previous Hunk",
 804                                    &GoToPreviousHunk,
 805                                    &focus_handle,
 806                                    window,
 807                                    cx,
 808                                )
 809                            }
 810                        })
 811                        .on_click({
 812                            let editor = editor.clone();
 813                            move |_event, window, cx| {
 814                                editor.update(cx, |editor, cx| {
 815                                    let snapshot = editor.snapshot(window, cx);
 816                                    let point =
 817                                        hunk_range.start.to_point(&snapshot.buffer_snapshot);
 818                                    editor.go_to_hunk_before_or_after_position(
 819                                        &snapshot,
 820                                        point,
 821                                        Direction::Prev,
 822                                        window,
 823                                        cx,
 824                                    );
 825                                    editor.expand_selected_diff_hunks(cx);
 826                                });
 827                            }
 828                        }),
 829                )
 830            },
 831        )
 832        .into_any_element()
 833}
 834
 835struct AgentDiffAddon;
 836
 837impl editor::Addon for AgentDiffAddon {
 838    fn to_any(&self) -> &dyn std::any::Any {
 839        self
 840    }
 841
 842    fn extend_key_context(&self, key_context: &mut gpui::KeyContext, _: &App) {
 843        key_context.add("agent_diff");
 844    }
 845}
 846
 847pub struct AgentDiffToolbar {
 848    active_item: Option<AgentDiffToolbarItem>,
 849    _settings_subscription: Subscription,
 850}
 851
 852pub enum AgentDiffToolbarItem {
 853    Pane(WeakEntity<AgentDiffPane>),
 854    Editor {
 855        editor: WeakEntity<Editor>,
 856        state: EditorState,
 857        _diff_subscription: Subscription,
 858    },
 859}
 860
 861impl AgentDiffToolbar {
 862    pub fn new(cx: &mut Context<Self>) -> Self {
 863        Self {
 864            active_item: None,
 865            _settings_subscription: cx.observe_global::<SettingsStore>(Self::update_location),
 866        }
 867    }
 868
 869    fn dispatch_action(&self, action: &dyn Action, window: &mut Window, cx: &mut Context<Self>) {
 870        let Some(active_item) = self.active_item.as_ref() else {
 871            return;
 872        };
 873
 874        match active_item {
 875            AgentDiffToolbarItem::Pane(agent_diff) => {
 876                if let Some(agent_diff) = agent_diff.upgrade() {
 877                    agent_diff.focus_handle(cx).focus(window);
 878                }
 879            }
 880            AgentDiffToolbarItem::Editor { editor, .. } => {
 881                if let Some(editor) = editor.upgrade() {
 882                    editor.read(cx).focus_handle(cx).focus(window);
 883                }
 884            }
 885        }
 886
 887        let action = action.boxed_clone();
 888        cx.defer(move |cx| {
 889            cx.dispatch_action(action.as_ref());
 890        })
 891    }
 892
 893    fn handle_diff_notify(&mut self, agent_diff: Entity<AgentDiff>, cx: &mut Context<Self>) {
 894        let Some(AgentDiffToolbarItem::Editor { editor, state, .. }) = self.active_item.as_mut()
 895        else {
 896            return;
 897        };
 898
 899        *state = agent_diff.read(cx).editor_state(&editor);
 900        self.update_location(cx);
 901        cx.notify();
 902    }
 903
 904    fn update_location(&mut self, cx: &mut Context<Self>) {
 905        let location = self.location(cx);
 906        cx.emit(ToolbarItemEvent::ChangeLocation(location));
 907    }
 908
 909    fn location(&self, cx: &App) -> ToolbarItemLocation {
 910        if !EditorSettings::get_global(cx).toolbar.agent_review {
 911            return ToolbarItemLocation::Hidden;
 912        }
 913
 914        match &self.active_item {
 915            None => ToolbarItemLocation::Hidden,
 916            Some(AgentDiffToolbarItem::Pane(_)) => ToolbarItemLocation::PrimaryRight,
 917            Some(AgentDiffToolbarItem::Editor { state, .. }) => match state {
 918                EditorState::Generating | EditorState::Reviewing => {
 919                    ToolbarItemLocation::PrimaryRight
 920                }
 921                EditorState::Idle => ToolbarItemLocation::Hidden,
 922            },
 923        }
 924    }
 925}
 926
 927impl EventEmitter<ToolbarItemEvent> for AgentDiffToolbar {}
 928
 929impl ToolbarItemView for AgentDiffToolbar {
 930    fn set_active_pane_item(
 931        &mut self,
 932        active_pane_item: Option<&dyn ItemHandle>,
 933        _: &mut Window,
 934        cx: &mut Context<Self>,
 935    ) -> ToolbarItemLocation {
 936        if let Some(item) = active_pane_item {
 937            if let Some(pane) = item.act_as::<AgentDiffPane>(cx) {
 938                self.active_item = Some(AgentDiffToolbarItem::Pane(pane.downgrade()));
 939                return self.location(cx);
 940            }
 941
 942            if let Some(editor) = item.act_as::<Editor>(cx) {
 943                if editor.read(cx).mode().is_full() {
 944                    let agent_diff = AgentDiff::global(cx);
 945
 946                    self.active_item = Some(AgentDiffToolbarItem::Editor {
 947                        editor: editor.downgrade(),
 948                        state: agent_diff.read(cx).editor_state(&editor.downgrade()),
 949                        _diff_subscription: cx.observe(&agent_diff, Self::handle_diff_notify),
 950                    });
 951
 952                    return self.location(cx);
 953                }
 954            }
 955        }
 956
 957        self.active_item = None;
 958        return self.location(cx);
 959    }
 960
 961    fn pane_focus_update(
 962        &mut self,
 963        _pane_focused: bool,
 964        _window: &mut Window,
 965        _cx: &mut Context<Self>,
 966    ) {
 967    }
 968}
 969
 970impl Render for AgentDiffToolbar {
 971    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
 972        let spinner_icon = div()
 973            .px_0p5()
 974            .id("generating")
 975            .tooltip(Tooltip::text("Generating Changes…"))
 976            .child(
 977                Icon::new(IconName::LoadCircle)
 978                    .size(IconSize::Small)
 979                    .color(Color::Accent)
 980                    .with_animation(
 981                        "load_circle",
 982                        Animation::new(Duration::from_secs(3)).repeat(),
 983                        |icon, delta| icon.transform(Transformation::rotate(percentage(delta))),
 984                    ),
 985            )
 986            .into_any();
 987
 988        let Some(active_item) = self.active_item.as_ref() else {
 989            return Empty.into_any();
 990        };
 991
 992        match active_item {
 993            AgentDiffToolbarItem::Editor { editor, state, .. } => {
 994                let Some(editor) = editor.upgrade() else {
 995                    return Empty.into_any();
 996                };
 997
 998                let editor_focus_handle = editor.read(cx).focus_handle(cx);
 999
1000                let content = match state {
1001                    EditorState::Idle => return Empty.into_any(),
1002                    EditorState::Generating => vec![spinner_icon],
1003                    EditorState::Reviewing => vec![
1004                        h_flex()
1005                            .child(
1006                                IconButton::new("hunk-up", IconName::ArrowUp)
1007                                    .icon_size(IconSize::Small)
1008                                    .tooltip(Tooltip::for_action_title_in(
1009                                        "Previous Hunk",
1010                                        &GoToPreviousHunk,
1011                                        &editor_focus_handle,
1012                                    ))
1013                                    .on_click({
1014                                        let editor_focus_handle = editor_focus_handle.clone();
1015                                        move |_, window, cx| {
1016                                            editor_focus_handle.dispatch_action(
1017                                                &GoToPreviousHunk,
1018                                                window,
1019                                                cx,
1020                                            );
1021                                        }
1022                                    }),
1023                            )
1024                            .child(
1025                                IconButton::new("hunk-down", IconName::ArrowDown)
1026                                    .icon_size(IconSize::Small)
1027                                    .tooltip(Tooltip::for_action_title_in(
1028                                        "Next Hunk",
1029                                        &GoToHunk,
1030                                        &editor_focus_handle,
1031                                    ))
1032                                    .on_click({
1033                                        let editor_focus_handle = editor_focus_handle.clone();
1034                                        move |_, window, cx| {
1035                                            editor_focus_handle
1036                                                .dispatch_action(&GoToHunk, window, cx);
1037                                        }
1038                                    }),
1039                            )
1040                            .into_any_element(),
1041                        vertical_divider().into_any_element(),
1042                        h_flex()
1043                            .gap_0p5()
1044                            .child(
1045                                Button::new("reject-all", "Reject All")
1046                                    .key_binding({
1047                                        KeyBinding::for_action_in(
1048                                            &RejectAll,
1049                                            &editor_focus_handle,
1050                                            window,
1051                                            cx,
1052                                        )
1053                                        .map(|kb| kb.size(rems_from_px(12.)))
1054                                    })
1055                                    .on_click(cx.listener(|this, _, window, cx| {
1056                                        this.dispatch_action(&RejectAll, window, cx)
1057                                    })),
1058                            )
1059                            .child(
1060                                Button::new("keep-all", "Keep All")
1061                                    .key_binding({
1062                                        KeyBinding::for_action_in(
1063                                            &KeepAll,
1064                                            &editor_focus_handle,
1065                                            window,
1066                                            cx,
1067                                        )
1068                                        .map(|kb| kb.size(rems_from_px(12.)))
1069                                    })
1070                                    .on_click(cx.listener(|this, _, window, cx| {
1071                                        this.dispatch_action(&KeepAll, window, cx)
1072                                    })),
1073                            )
1074                            .into_any_element(),
1075                    ],
1076                };
1077
1078                h_flex()
1079                    .track_focus(&editor_focus_handle)
1080                    .size_full()
1081                    .px_1()
1082                    .mr_1()
1083                    .gap_1()
1084                    .children(content)
1085                    .child(vertical_divider())
1086                    .when_some(editor.read(cx).workspace(), |this, _workspace| {
1087                        this.child(
1088                            IconButton::new("review", IconName::ListTodo)
1089                                .icon_size(IconSize::Small)
1090                                .tooltip(Tooltip::for_action_title_in(
1091                                    "Review All Files",
1092                                    &OpenAgentDiff,
1093                                    &editor_focus_handle,
1094                                ))
1095                                .on_click({
1096                                    cx.listener(move |this, _, window, cx| {
1097                                        this.dispatch_action(&OpenAgentDiff, window, cx);
1098                                    })
1099                                }),
1100                        )
1101                    })
1102                    .child(vertical_divider())
1103                    .on_action({
1104                        let editor = editor.clone();
1105                        move |_action: &OpenAgentDiff, window, cx| {
1106                            AgentDiff::global(cx).update(cx, |agent_diff, cx| {
1107                                agent_diff.deploy_pane_from_editor(&editor, window, cx);
1108                            });
1109                        }
1110                    })
1111                    .into_any()
1112            }
1113            AgentDiffToolbarItem::Pane(agent_diff) => {
1114                let Some(agent_diff) = agent_diff.upgrade() else {
1115                    return Empty.into_any();
1116                };
1117
1118                let has_pending_edit_tool_use = agent_diff
1119                    .read(cx)
1120                    .agent
1121                    .read(cx)
1122                    .has_pending_edit_tool_uses();
1123
1124                if has_pending_edit_tool_use {
1125                    return div().px_2().child(spinner_icon).into_any();
1126                }
1127
1128                let is_empty = agent_diff.read(cx).multibuffer.read(cx).is_empty();
1129                if is_empty {
1130                    return Empty.into_any();
1131                }
1132
1133                let focus_handle = agent_diff.focus_handle(cx);
1134
1135                h_group_xl()
1136                    .my_neg_1()
1137                    .py_1()
1138                    .items_center()
1139                    .flex_wrap()
1140                    .child(
1141                        h_group_sm()
1142                            .child(
1143                                Button::new("reject-all", "Reject All")
1144                                    .key_binding({
1145                                        KeyBinding::for_action_in(
1146                                            &RejectAll,
1147                                            &focus_handle,
1148                                            window,
1149                                            cx,
1150                                        )
1151                                        .map(|kb| kb.size(rems_from_px(12.)))
1152                                    })
1153                                    .on_click(cx.listener(|this, _, window, cx| {
1154                                        this.dispatch_action(&RejectAll, window, cx)
1155                                    })),
1156                            )
1157                            .child(
1158                                Button::new("keep-all", "Keep All")
1159                                    .key_binding({
1160                                        KeyBinding::for_action_in(
1161                                            &KeepAll,
1162                                            &focus_handle,
1163                                            window,
1164                                            cx,
1165                                        )
1166                                        .map(|kb| kb.size(rems_from_px(12.)))
1167                                    })
1168                                    .on_click(cx.listener(|this, _, window, cx| {
1169                                        this.dispatch_action(&KeepAll, window, cx)
1170                                    })),
1171                            ),
1172                    )
1173                    .into_any()
1174            }
1175        }
1176    }
1177}
1178
1179#[derive(Default)]
1180pub struct AgentDiff {
1181    reviewing_editors: HashMap<WeakEntity<Editor>, EditorState>,
1182    workspace_threads: HashMap<WeakEntity<Workspace>, WorkspaceThread>,
1183}
1184
1185#[derive(Clone, Debug, PartialEq, Eq)]
1186pub enum EditorState {
1187    Idle,
1188    Reviewing,
1189    Generating,
1190}
1191
1192struct WorkspaceThread {
1193    agent: WeakEntity<ZedAgentThread>,
1194    _thread_subscriptions: [Subscription; 2],
1195    singleton_editors: HashMap<WeakEntity<Buffer>, HashMap<WeakEntity<Editor>, Subscription>>,
1196    _settings_subscription: Subscription,
1197    _workspace_subscription: Option<Subscription>,
1198}
1199
1200struct AgentDiffGlobal(Entity<AgentDiff>);
1201
1202impl Global for AgentDiffGlobal {}
1203
1204impl AgentDiff {
1205    fn global(cx: &mut App) -> Entity<Self> {
1206        cx.try_global::<AgentDiffGlobal>()
1207            .map(|global| global.0.clone())
1208            .unwrap_or_else(|| {
1209                let entity = cx.new(|_cx| Self::default());
1210                let global = AgentDiffGlobal(entity.clone());
1211                cx.set_global(global);
1212                entity.clone()
1213            })
1214    }
1215
1216    pub fn set_active_thread(
1217        workspace: &WeakEntity<Workspace>,
1218        thread: &Entity<ZedAgentThread>,
1219        window: &mut Window,
1220        cx: &mut App,
1221    ) {
1222        Self::global(cx).update(cx, |this, cx| {
1223            this.register_active_thread_impl(workspace, thread, window, cx);
1224        });
1225    }
1226
1227    fn register_active_thread_impl(
1228        &mut self,
1229        workspace: &WeakEntity<Workspace>,
1230        agent: &Entity<ZedAgentThread>,
1231        window: &mut Window,
1232        cx: &mut Context<Self>,
1233    ) {
1234        let action_log = agent.read(cx).action_log().clone();
1235
1236        let action_log_subscription = cx.observe_in(&action_log, window, {
1237            let workspace = workspace.clone();
1238            move |this, _action_log, window, cx| {
1239                this.update_reviewing_editors(&workspace, window, cx);
1240            }
1241        });
1242
1243        let thread_subscription = cx.subscribe_in(&agent, window, {
1244            let workspace = workspace.clone();
1245            move |this, _thread, event, window, cx| {
1246                this.handle_thread_event(&workspace, event, window, cx)
1247            }
1248        });
1249
1250        if let Some(workspace_thread) = self.workspace_threads.get_mut(&workspace) {
1251            // replace thread and action log subscription, but keep editors
1252            workspace_thread.agent = agent.downgrade();
1253            workspace_thread._thread_subscriptions = [action_log_subscription, thread_subscription];
1254            self.update_reviewing_editors(&workspace, window, cx);
1255            return;
1256        }
1257
1258        let settings_subscription = cx.observe_global_in::<SettingsStore>(window, {
1259            let workspace = workspace.clone();
1260            let mut was_active = AgentSettings::get_global(cx).single_file_review;
1261            move |this, window, cx| {
1262                let is_active = AgentSettings::get_global(cx).single_file_review;
1263                if was_active != is_active {
1264                    was_active = is_active;
1265                    this.update_reviewing_editors(&workspace, window, cx);
1266                }
1267            }
1268        });
1269
1270        let workspace_subscription = workspace
1271            .upgrade()
1272            .map(|workspace| cx.subscribe_in(&workspace, window, Self::handle_workspace_event));
1273
1274        self.workspace_threads.insert(
1275            workspace.clone(),
1276            WorkspaceThread {
1277                agent: agent.downgrade(),
1278                _thread_subscriptions: [action_log_subscription, thread_subscription],
1279                singleton_editors: HashMap::default(),
1280                _settings_subscription: settings_subscription,
1281                _workspace_subscription: workspace_subscription,
1282            },
1283        );
1284
1285        let workspace = workspace.clone();
1286        cx.defer_in(window, move |this, window, cx| {
1287            if let Some(workspace) = workspace.upgrade() {
1288                this.register_workspace(workspace, window, cx);
1289            }
1290        });
1291    }
1292
1293    fn register_workspace(
1294        &mut self,
1295        workspace: Entity<Workspace>,
1296        window: &mut Window,
1297        cx: &mut Context<Self>,
1298    ) {
1299        let agent_diff = cx.entity();
1300
1301        let editors = workspace.update(cx, |workspace, cx| {
1302            let agent_diff = agent_diff.clone();
1303
1304            Self::register_review_action::<Keep>(workspace, Self::keep, &agent_diff);
1305            Self::register_review_action::<Reject>(workspace, Self::reject, &agent_diff);
1306            Self::register_review_action::<KeepAll>(workspace, Self::keep_all, &agent_diff);
1307            Self::register_review_action::<RejectAll>(workspace, Self::reject_all, &agent_diff);
1308
1309            workspace.items_of_type(cx).collect::<Vec<_>>()
1310        });
1311
1312        let weak_workspace = workspace.downgrade();
1313
1314        for editor in editors {
1315            if let Some(buffer) = Self::full_editor_buffer(editor.read(cx), cx) {
1316                self.register_editor(weak_workspace.clone(), buffer, editor, window, cx);
1317            };
1318        }
1319
1320        self.update_reviewing_editors(&weak_workspace, window, cx);
1321    }
1322
1323    fn register_review_action<T: Action>(
1324        workspace: &mut Workspace,
1325        review: impl Fn(&Entity<Editor>, &Entity<ZedAgentThread>, &mut Window, &mut App) -> PostReviewState
1326        + 'static,
1327        this: &Entity<AgentDiff>,
1328    ) {
1329        let this = this.clone();
1330        workspace.register_action(move |workspace, _: &T, window, cx| {
1331            let review = &review;
1332            let task = this.update(cx, |this, cx| {
1333                this.review_in_active_editor(workspace, review, window, cx)
1334            });
1335
1336            if let Some(task) = task {
1337                task.detach_and_log_err(cx);
1338            } else {
1339                cx.propagate();
1340            }
1341        });
1342    }
1343
1344    fn handle_thread_event(
1345        &mut self,
1346        workspace: &WeakEntity<Workspace>,
1347        event: &ThreadEvent,
1348        window: &mut Window,
1349        cx: &mut Context<Self>,
1350    ) {
1351        match event {
1352            ThreadEvent::NewRequest
1353            | ThreadEvent::Stopped(Ok(StopReason::EndTurn))
1354            | ThreadEvent::Stopped(Ok(StopReason::MaxTokens))
1355            | ThreadEvent::Stopped(Ok(StopReason::Refusal))
1356            | ThreadEvent::Stopped(Err(_))
1357            | ThreadEvent::ShowError(_)
1358            | ThreadEvent::CompletionCanceled => {
1359                self.update_reviewing_editors(workspace, window, cx);
1360            }
1361            // intentionally being exhaustive in case we add a variant we should handle
1362            ThreadEvent::Stopped(Ok(StopReason::ToolUse))
1363            | ThreadEvent::StreamedCompletion
1364            | ThreadEvent::ReceivedTextChunk
1365            | ThreadEvent::StreamedAssistantText(_, _)
1366            | ThreadEvent::StreamedAssistantThinking(_, _)
1367            | ThreadEvent::StreamedToolUse { .. }
1368            | ThreadEvent::StreamedToolUse2 { .. }
1369            | ThreadEvent::InvalidToolInput { .. }
1370            | ThreadEvent::MissingToolUse { .. }
1371            | ThreadEvent::MessageAdded(_)
1372            | ThreadEvent::MessageEdited(_)
1373            | ThreadEvent::MessageDeleted(_)
1374            | ThreadEvent::SummaryGenerated
1375            | ThreadEvent::SummaryChanged
1376            | ThreadEvent::UsePendingTools { .. }
1377            | ThreadEvent::ToolFinished { .. }
1378            | ThreadEvent::CheckpointChanged
1379            | ThreadEvent::ToolConfirmationNeeded
1380            | ThreadEvent::ToolUseLimitReached
1381            | ThreadEvent::CancelEditing
1382            | ThreadEvent::RetriesFailed { .. }
1383            | ThreadEvent::ProfileChanged => {}
1384        }
1385    }
1386
1387    fn handle_workspace_event(
1388        &mut self,
1389        workspace: &Entity<Workspace>,
1390        event: &workspace::Event,
1391        window: &mut Window,
1392        cx: &mut Context<Self>,
1393    ) {
1394        match event {
1395            workspace::Event::ItemAdded { item } => {
1396                if let Some(editor) = item.downcast::<Editor>() {
1397                    if let Some(buffer) = Self::full_editor_buffer(editor.read(cx), cx) {
1398                        self.register_editor(
1399                            workspace.downgrade(),
1400                            buffer.clone(),
1401                            editor,
1402                            window,
1403                            cx,
1404                        );
1405                    }
1406                }
1407            }
1408            _ => {}
1409        }
1410    }
1411
1412    fn full_editor_buffer(editor: &Editor, cx: &App) -> Option<WeakEntity<Buffer>> {
1413        if editor.mode().is_full() {
1414            editor
1415                .buffer()
1416                .read(cx)
1417                .as_singleton()
1418                .map(|buffer| buffer.downgrade())
1419        } else {
1420            None
1421        }
1422    }
1423
1424    fn register_editor(
1425        &mut self,
1426        workspace: WeakEntity<Workspace>,
1427        buffer: WeakEntity<Buffer>,
1428        editor: Entity<Editor>,
1429        window: &mut Window,
1430        cx: &mut Context<Self>,
1431    ) {
1432        let Some(workspace_thread) = self.workspace_threads.get_mut(&workspace) else {
1433            return;
1434        };
1435
1436        let weak_editor = editor.downgrade();
1437
1438        workspace_thread
1439            .singleton_editors
1440            .entry(buffer.clone())
1441            .or_default()
1442            .entry(weak_editor.clone())
1443            .or_insert_with(|| {
1444                let workspace = workspace.clone();
1445                cx.observe_release(&editor, move |this, _, _cx| {
1446                    let Some(active_thread) = this.workspace_threads.get_mut(&workspace) else {
1447                        return;
1448                    };
1449
1450                    if let Entry::Occupied(mut entry) =
1451                        active_thread.singleton_editors.entry(buffer)
1452                    {
1453                        let set = entry.get_mut();
1454                        set.remove(&weak_editor);
1455
1456                        if set.is_empty() {
1457                            entry.remove();
1458                        }
1459                    }
1460                })
1461            });
1462
1463        self.update_reviewing_editors(&workspace, window, cx);
1464    }
1465
1466    fn update_reviewing_editors(
1467        &mut self,
1468        workspace: &WeakEntity<Workspace>,
1469        window: &mut Window,
1470        cx: &mut Context<Self>,
1471    ) {
1472        if !AgentSettings::get_global(cx).single_file_review {
1473            for (editor, _) in self.reviewing_editors.drain() {
1474                editor
1475                    .update(cx, |editor, cx| {
1476                        editor.end_temporary_diff_override(cx);
1477                        editor.unregister_addon::<EditorAgentDiffAddon>();
1478                    })
1479                    .ok();
1480            }
1481            return;
1482        }
1483
1484        let Some(workspace_thread) = self.workspace_threads.get_mut(workspace) else {
1485            return;
1486        };
1487
1488        let Some(agent) = workspace_thread.agent.upgrade() else {
1489            return;
1490        };
1491
1492        let action_log = agent.read(cx).action_log();
1493        let changed_buffers = action_log.read(cx).changed_buffers(cx);
1494
1495        let mut unaffected = self.reviewing_editors.clone();
1496
1497        for (buffer, diff_handle) in changed_buffers {
1498            if buffer.read(cx).file().is_none() {
1499                continue;
1500            }
1501
1502            let Some(buffer_editors) = workspace_thread.singleton_editors.get(&buffer.downgrade())
1503            else {
1504                continue;
1505            };
1506
1507            for (weak_editor, _) in buffer_editors {
1508                let Some(editor) = weak_editor.upgrade() else {
1509                    continue;
1510                };
1511
1512                let multibuffer = editor.read(cx).buffer().clone();
1513                multibuffer.update(cx, |multibuffer, cx| {
1514                    multibuffer.add_diff(diff_handle.clone(), cx);
1515                });
1516
1517                let new_state = if agent.read(cx).is_generating() {
1518                    EditorState::Generating
1519                } else {
1520                    EditorState::Reviewing
1521                };
1522
1523                let previous_state = self
1524                    .reviewing_editors
1525                    .insert(weak_editor.clone(), new_state.clone());
1526
1527                if previous_state.is_none() {
1528                    editor.update(cx, |editor, cx| {
1529                        editor.start_temporary_diff_override();
1530                        editor.set_render_diff_hunk_controls(diff_hunk_controls(&action_log), cx);
1531                        editor.set_expand_all_diff_hunks(cx);
1532                        editor.register_addon(EditorAgentDiffAddon);
1533                    });
1534                } else {
1535                    unaffected.remove(&weak_editor);
1536                }
1537
1538                if new_state == EditorState::Reviewing && previous_state != Some(new_state) {
1539                    // Jump to first hunk when we enter review mode
1540                    editor.update(cx, |editor, cx| {
1541                        let snapshot = multibuffer.read(cx).snapshot(cx);
1542                        if let Some(first_hunk) = snapshot.diff_hunks().next() {
1543                            let first_hunk_start = first_hunk.multi_buffer_range().start;
1544
1545                            editor.change_selections(
1546                                SelectionEffects::scroll(Autoscroll::center()),
1547                                window,
1548                                cx,
1549                                |selections| {
1550                                    selections.select_ranges([first_hunk_start..first_hunk_start])
1551                                },
1552                            );
1553                        }
1554                    });
1555                }
1556            }
1557        }
1558
1559        // Remove editors from this workspace that are no longer under review
1560        for (editor, _) in unaffected {
1561            // Note: We could avoid this check by storing `reviewing_editors` by Workspace,
1562            // but that would add another lookup in `AgentDiff::editor_state`
1563            // which gets called much more frequently.
1564            let in_workspace = editor
1565                .read_with(cx, |editor, _cx| editor.workspace())
1566                .ok()
1567                .flatten()
1568                .map_or(false, |editor_workspace| {
1569                    editor_workspace.entity_id() == workspace.entity_id()
1570                });
1571
1572            if in_workspace {
1573                editor
1574                    .update(cx, |editor, cx| {
1575                        editor.end_temporary_diff_override(cx);
1576                        editor.unregister_addon::<EditorAgentDiffAddon>();
1577                    })
1578                    .ok();
1579                self.reviewing_editors.remove(&editor);
1580            }
1581        }
1582
1583        cx.notify();
1584    }
1585
1586    fn editor_state(&self, editor: &WeakEntity<Editor>) -> EditorState {
1587        self.reviewing_editors
1588            .get(&editor)
1589            .cloned()
1590            .unwrap_or(EditorState::Idle)
1591    }
1592
1593    fn deploy_pane_from_editor(&self, editor: &Entity<Editor>, window: &mut Window, cx: &mut App) {
1594        let Some(workspace) = editor.read(cx).workspace() else {
1595            return;
1596        };
1597
1598        let Some(WorkspaceThread { agent, .. }) =
1599            self.workspace_threads.get(&workspace.downgrade())
1600        else {
1601            return;
1602        };
1603
1604        let Some(agent) = agent.upgrade() else {
1605            return;
1606        };
1607
1608        AgentDiffPane::deploy(agent, workspace.downgrade(), window, cx).log_err();
1609    }
1610
1611    fn keep_all(
1612        editor: &Entity<Editor>,
1613        agent: &Entity<ZedAgentThread>,
1614        window: &mut Window,
1615        cx: &mut App,
1616    ) -> PostReviewState {
1617        editor.update(cx, |editor, cx| {
1618            let snapshot = editor.buffer().read(cx).snapshot(cx);
1619            keep_edits_in_ranges(
1620                editor,
1621                &snapshot,
1622                &agent.read(cx).action_log(),
1623                vec![editor::Anchor::min()..editor::Anchor::max()],
1624                window,
1625                cx,
1626            );
1627        });
1628        PostReviewState::AllReviewed
1629    }
1630
1631    fn reject_all(
1632        editor: &Entity<Editor>,
1633        thread: &Entity<ZedAgentThread>,
1634        window: &mut Window,
1635        cx: &mut App,
1636    ) -> PostReviewState {
1637        editor.update(cx, |editor, cx| {
1638            let snapshot = editor.buffer().read(cx).snapshot(cx);
1639            reject_edits_in_ranges(
1640                editor,
1641                &snapshot,
1642                &thread.read(cx).action_log(),
1643                vec![editor::Anchor::min()..editor::Anchor::max()],
1644                window,
1645                cx,
1646            );
1647        });
1648        PostReviewState::AllReviewed
1649    }
1650
1651    fn keep(
1652        editor: &Entity<Editor>,
1653        agent: &Entity<ZedAgentThread>,
1654        window: &mut Window,
1655        cx: &mut App,
1656    ) -> PostReviewState {
1657        editor.update(cx, |editor, cx| {
1658            let snapshot = editor.buffer().read(cx).snapshot(cx);
1659            keep_edits_in_selection(editor, &snapshot, &agent.read(cx).action_log(), window, cx);
1660            Self::post_review_state(&snapshot)
1661        })
1662    }
1663
1664    fn reject(
1665        editor: &Entity<Editor>,
1666        agent: &Entity<ZedAgentThread>,
1667        window: &mut Window,
1668        cx: &mut App,
1669    ) -> PostReviewState {
1670        editor.update(cx, |editor, cx| {
1671            let snapshot = editor.buffer().read(cx).snapshot(cx);
1672            reject_edits_in_selection(editor, &snapshot, &agent.read(cx).action_log(), window, cx);
1673            Self::post_review_state(&snapshot)
1674        })
1675    }
1676
1677    fn post_review_state(snapshot: &MultiBufferSnapshot) -> PostReviewState {
1678        for (i, _) in snapshot.diff_hunks().enumerate() {
1679            if i > 0 {
1680                return PostReviewState::Pending;
1681            }
1682        }
1683        PostReviewState::AllReviewed
1684    }
1685
1686    fn review_in_active_editor(
1687        &mut self,
1688        workspace: &mut Workspace,
1689        review: impl Fn(&Entity<Editor>, &Entity<ZedAgentThread>, &mut Window, &mut App) -> PostReviewState,
1690        window: &mut Window,
1691        cx: &mut Context<Self>,
1692    ) -> Option<Task<Result<()>>> {
1693        let active_item = workspace.active_item(cx)?;
1694        let editor = active_item.act_as::<Editor>(cx)?;
1695
1696        if !matches!(
1697            self.editor_state(&editor.downgrade()),
1698            EditorState::Reviewing
1699        ) {
1700            return None;
1701        }
1702
1703        let WorkspaceThread { agent, .. } = self.workspace_threads.get(&workspace.weak_handle())?;
1704
1705        let agent = agent.upgrade()?;
1706
1707        if let PostReviewState::AllReviewed = review(&editor, &agent, window, cx) {
1708            if let Some(curr_buffer) = editor.read(cx).buffer().read(cx).as_singleton() {
1709                let changed_buffers = agent.read(cx).action_log().read(cx).changed_buffers(cx);
1710
1711                let mut keys = changed_buffers.keys().cycle();
1712                keys.find(|k| *k == &curr_buffer);
1713                let next_project_path = keys
1714                    .next()
1715                    .filter(|k| *k != &curr_buffer)
1716                    .and_then(|after| after.read(cx).project_path(cx));
1717
1718                if let Some(path) = next_project_path {
1719                    let task = workspace.open_path(path, None, true, window, cx);
1720                    let task = cx.spawn(async move |_, _cx| task.await.map(|_| ()));
1721                    return Some(task);
1722                }
1723            }
1724        }
1725
1726        return Some(Task::ready(Ok(())));
1727    }
1728}
1729
1730enum PostReviewState {
1731    AllReviewed,
1732    Pending,
1733}
1734
1735pub struct EditorAgentDiffAddon;
1736
1737impl editor::Addon for EditorAgentDiffAddon {
1738    fn to_any(&self) -> &dyn std::any::Any {
1739        self
1740    }
1741
1742    fn extend_key_context(&self, key_context: &mut gpui::KeyContext, _: &App) {
1743        key_context.add("agent_diff");
1744        key_context.add("editor_agent_diff");
1745    }
1746}
1747
1748#[cfg(test)]
1749mod tests {
1750    use super::*;
1751    use crate::Keep;
1752    use agent::thread_store::{self, ThreadStore};
1753    use agent_settings::AgentSettings;
1754    use assistant_tool::ToolWorkingSet;
1755    use editor::EditorSettings;
1756    use gpui::{TestAppContext, UpdateGlobal, VisualTestContext};
1757    use project::{FakeFs, Project};
1758    use prompt_store::PromptBuilder;
1759    use serde_json::json;
1760    use settings::{Settings, SettingsStore};
1761    use std::sync::Arc;
1762    use theme::ThemeSettings;
1763    use util::path;
1764
1765    #[gpui::test]
1766    async fn test_multibuffer_agent_diff(cx: &mut TestAppContext) {
1767        cx.update(|cx| {
1768            let settings_store = SettingsStore::test(cx);
1769            cx.set_global(settings_store);
1770            language::init(cx);
1771            Project::init_settings(cx);
1772            AgentSettings::register(cx);
1773            prompt_store::init(cx);
1774            thread_store::init(cx);
1775            workspace::init_settings(cx);
1776            ThemeSettings::register(cx);
1777            EditorSettings::register(cx);
1778            language_model::init_settings(cx);
1779        });
1780
1781        let fs = FakeFs::new(cx.executor());
1782        fs.insert_tree(
1783            path!("/test"),
1784            json!({"file1": "abc\ndef\nghi\njkl\nmno\npqr\nstu\nvwx\nyz"}),
1785        )
1786        .await;
1787        let project = Project::test(fs, [path!("/test").as_ref()], cx).await;
1788        let buffer_path = project
1789            .read_with(cx, |project, cx| {
1790                project.find_project_path("test/file1", cx)
1791            })
1792            .unwrap();
1793
1794        let prompt_store = None;
1795        let thread_store = cx
1796            .update(|cx| {
1797                ThreadStore::load(
1798                    project.clone(),
1799                    cx.new(|_| ToolWorkingSet::default()),
1800                    prompt_store,
1801                    Arc::new(PromptBuilder::new(None).unwrap()),
1802                    cx,
1803                )
1804            })
1805            .await
1806            .unwrap();
1807        let agent = thread_store.update(cx, |store, cx| store.create_thread(cx));
1808        let action_log = agent.read_with(cx, |agent, _| agent.action_log().clone());
1809
1810        let (workspace, cx) =
1811            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1812        let agent_diff = cx.new_window_entity(|window, cx| {
1813            AgentDiffPane::new(agent.clone(), workspace.downgrade(), window, cx)
1814        });
1815        let editor = agent_diff.read_with(cx, |diff, _cx| diff.editor.clone());
1816
1817        let buffer = project
1818            .update(cx, |project, cx| project.open_buffer(buffer_path, cx))
1819            .await
1820            .unwrap();
1821        cx.update(|_, cx| {
1822            action_log.update(cx, |log, cx| log.buffer_read(buffer.clone(), cx));
1823            buffer.update(cx, |buffer, cx| {
1824                buffer
1825                    .edit(
1826                        [
1827                            (Point::new(1, 1)..Point::new(1, 2), "E"),
1828                            (Point::new(3, 2)..Point::new(3, 3), "L"),
1829                            (Point::new(5, 0)..Point::new(5, 1), "P"),
1830                            (Point::new(7, 1)..Point::new(7, 2), "W"),
1831                        ],
1832                        None,
1833                        cx,
1834                    )
1835                    .unwrap()
1836            });
1837            action_log.update(cx, |log, cx| log.buffer_edited(buffer.clone(), cx));
1838        });
1839        cx.run_until_parked();
1840
1841        // When opening the assistant diff, the cursor is positioned on the first hunk.
1842        assert_eq!(
1843            editor.read_with(cx, |editor, cx| editor.text(cx)),
1844            "abc\ndef\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
1845        );
1846        assert_eq!(
1847            editor
1848                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
1849                .range(),
1850            Point::new(1, 0)..Point::new(1, 0)
1851        );
1852
1853        // After keeping a hunk, the cursor should be positioned on the second hunk.
1854        agent_diff.update_in(cx, |diff, window, cx| diff.keep(&Keep, window, cx));
1855        cx.run_until_parked();
1856        assert_eq!(
1857            editor.read_with(cx, |editor, cx| editor.text(cx)),
1858            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
1859        );
1860        assert_eq!(
1861            editor
1862                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
1863                .range(),
1864            Point::new(3, 0)..Point::new(3, 0)
1865        );
1866
1867        // Rejecting a hunk also moves the cursor to the next hunk, possibly cycling if it's at the end.
1868        editor.update_in(cx, |editor, window, cx| {
1869            editor.change_selections(SelectionEffects::no_scroll(), window, cx, |selections| {
1870                selections.select_ranges([Point::new(10, 0)..Point::new(10, 0)])
1871            });
1872        });
1873        agent_diff.update_in(cx, |diff, window, cx| {
1874            diff.reject(&crate::Reject, window, cx)
1875        });
1876        cx.run_until_parked();
1877        assert_eq!(
1878            editor.read_with(cx, |editor, cx| editor.text(cx)),
1879            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nyz"
1880        );
1881        assert_eq!(
1882            editor
1883                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
1884                .range(),
1885            Point::new(3, 0)..Point::new(3, 0)
1886        );
1887
1888        // Keeping a range that doesn't intersect the current selection doesn't move it.
1889        agent_diff.update_in(cx, |_diff, window, cx| {
1890            let position = editor
1891                .read(cx)
1892                .buffer()
1893                .read(cx)
1894                .read(cx)
1895                .anchor_before(Point::new(7, 0));
1896            editor.update(cx, |editor, cx| {
1897                let snapshot = editor.buffer().read(cx).snapshot(cx);
1898                keep_edits_in_ranges(
1899                    editor,
1900                    &snapshot,
1901                    &agent.read(cx).action_log(),
1902                    vec![position..position],
1903                    window,
1904                    cx,
1905                )
1906            });
1907        });
1908        cx.run_until_parked();
1909        assert_eq!(
1910            editor.read_with(cx, |editor, cx| editor.text(cx)),
1911            "abc\ndEf\nghi\njkl\njkL\nmno\nPqr\nstu\nvwx\nyz"
1912        );
1913        assert_eq!(
1914            editor
1915                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
1916                .range(),
1917            Point::new(3, 0)..Point::new(3, 0)
1918        );
1919    }
1920
1921    #[gpui::test]
1922    async fn test_singleton_agent_diff(cx: &mut TestAppContext) {
1923        cx.update(|cx| {
1924            let settings_store = SettingsStore::test(cx);
1925            cx.set_global(settings_store);
1926            language::init(cx);
1927            Project::init_settings(cx);
1928            AgentSettings::register(cx);
1929            prompt_store::init(cx);
1930            thread_store::init(cx);
1931            workspace::init_settings(cx);
1932            ThemeSettings::register(cx);
1933            EditorSettings::register(cx);
1934            language_model::init_settings(cx);
1935            workspace::register_project_item::<Editor>(cx);
1936        });
1937
1938        let fs = FakeFs::new(cx.executor());
1939        fs.insert_tree(
1940            path!("/test"),
1941            json!({"file1": "abc\ndef\nghi\njkl\nmno\npqr\nstu\nvwx\nyz"}),
1942        )
1943        .await;
1944        fs.insert_tree(path!("/test"), json!({"file2": "abc\ndef\nghi"}))
1945            .await;
1946
1947        let project = Project::test(fs, [path!("/test").as_ref()], cx).await;
1948        let buffer_path1 = project
1949            .read_with(cx, |project, cx| {
1950                project.find_project_path("test/file1", cx)
1951            })
1952            .unwrap();
1953        let buffer_path2 = project
1954            .read_with(cx, |project, cx| {
1955                project.find_project_path("test/file2", cx)
1956            })
1957            .unwrap();
1958
1959        let prompt_store = None;
1960        let thread_store = cx
1961            .update(|cx| {
1962                ThreadStore::load(
1963                    project.clone(),
1964                    cx.new(|_| ToolWorkingSet::default()),
1965                    prompt_store,
1966                    Arc::new(PromptBuilder::new(None).unwrap()),
1967                    cx,
1968                )
1969            })
1970            .await
1971            .unwrap();
1972        let agent = thread_store.update(cx, |store, cx| store.create_thread(cx));
1973        let action_log = agent.read_with(cx, |agent, _| agent.action_log().clone());
1974
1975        let (workspace, cx) =
1976            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
1977
1978        // Add the diff toolbar to the active pane
1979        let diff_toolbar = cx.new_window_entity(|_, cx| AgentDiffToolbar::new(cx));
1980
1981        workspace.update_in(cx, {
1982            let diff_toolbar = diff_toolbar.clone();
1983
1984            move |workspace, window, cx| {
1985                workspace.active_pane().update(cx, |pane, cx| {
1986                    pane.toolbar().update(cx, |toolbar, cx| {
1987                        toolbar.add_item(diff_toolbar, window, cx);
1988                    });
1989                })
1990            }
1991        });
1992
1993        // Set the active thread
1994        cx.update(|window, cx| {
1995            AgentDiff::set_active_thread(&workspace.downgrade(), &agent, window, cx)
1996        });
1997
1998        let buffer1 = project
1999            .update(cx, |project, cx| {
2000                project.open_buffer(buffer_path1.clone(), cx)
2001            })
2002            .await
2003            .unwrap();
2004        let buffer2 = project
2005            .update(cx, |project, cx| {
2006                project.open_buffer(buffer_path2.clone(), cx)
2007            })
2008            .await
2009            .unwrap();
2010
2011        // Open an editor for buffer1
2012        let editor1 = cx.new_window_entity(|window, cx| {
2013            Editor::for_buffer(buffer1.clone(), Some(project.clone()), window, cx)
2014        });
2015
2016        workspace.update_in(cx, |workspace, window, cx| {
2017            workspace.add_item_to_active_pane(Box::new(editor1.clone()), None, true, window, cx);
2018        });
2019        cx.run_until_parked();
2020
2021        // Toolbar knows about the current editor, but it's hidden since there are no changes yet
2022        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2023            toolbar.active_item,
2024            Some(AgentDiffToolbarItem::Editor {
2025                state: EditorState::Idle,
2026                ..
2027            })
2028        )));
2029        assert_eq!(
2030            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2031            ToolbarItemLocation::Hidden
2032        );
2033
2034        // Make changes
2035        cx.update(|_, cx| {
2036            action_log.update(cx, |log, cx| log.buffer_read(buffer1.clone(), cx));
2037            buffer1.update(cx, |buffer, cx| {
2038                buffer
2039                    .edit(
2040                        [
2041                            (Point::new(1, 1)..Point::new(1, 2), "E"),
2042                            (Point::new(3, 2)..Point::new(3, 3), "L"),
2043                            (Point::new(5, 0)..Point::new(5, 1), "P"),
2044                            (Point::new(7, 1)..Point::new(7, 2), "W"),
2045                        ],
2046                        None,
2047                        cx,
2048                    )
2049                    .unwrap()
2050            });
2051            action_log.update(cx, |log, cx| log.buffer_edited(buffer1.clone(), cx));
2052
2053            action_log.update(cx, |log, cx| log.buffer_read(buffer2.clone(), cx));
2054            buffer2.update(cx, |buffer, cx| {
2055                buffer
2056                    .edit(
2057                        [
2058                            (Point::new(0, 0)..Point::new(0, 1), "A"),
2059                            (Point::new(2, 1)..Point::new(2, 2), "H"),
2060                        ],
2061                        None,
2062                        cx,
2063                    )
2064                    .unwrap();
2065            });
2066            action_log.update(cx, |log, cx| log.buffer_edited(buffer2.clone(), cx));
2067        });
2068        cx.run_until_parked();
2069
2070        // The already opened editor displays the diff and the cursor is at the first hunk
2071        assert_eq!(
2072            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2073            "abc\ndef\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
2074        );
2075        assert_eq!(
2076            editor1
2077                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
2078                .range(),
2079            Point::new(1, 0)..Point::new(1, 0)
2080        );
2081
2082        // The toolbar is displayed in the right state
2083        assert_eq!(
2084            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2085            ToolbarItemLocation::PrimaryRight
2086        );
2087        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2088            toolbar.active_item,
2089            Some(AgentDiffToolbarItem::Editor {
2090                state: EditorState::Reviewing,
2091                ..
2092            })
2093        )));
2094
2095        // The toolbar respects its setting
2096        override_toolbar_agent_review_setting(false, cx);
2097        assert_eq!(
2098            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2099            ToolbarItemLocation::Hidden
2100        );
2101        override_toolbar_agent_review_setting(true, cx);
2102        assert_eq!(
2103            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2104            ToolbarItemLocation::PrimaryRight
2105        );
2106
2107        // After keeping a hunk, the cursor should be positioned on the second hunk.
2108        workspace.update(cx, |_, cx| {
2109            cx.dispatch_action(&Keep);
2110        });
2111        cx.run_until_parked();
2112        assert_eq!(
2113            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2114            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nvWx\nyz"
2115        );
2116        assert_eq!(
2117            editor1
2118                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
2119                .range(),
2120            Point::new(3, 0)..Point::new(3, 0)
2121        );
2122
2123        // Rejecting a hunk also moves the cursor to the next hunk, possibly cycling if it's at the end.
2124        editor1.update_in(cx, |editor, window, cx| {
2125            editor.change_selections(SelectionEffects::no_scroll(), window, cx, |selections| {
2126                selections.select_ranges([Point::new(10, 0)..Point::new(10, 0)])
2127            });
2128        });
2129        workspace.update(cx, |_, cx| {
2130            cx.dispatch_action(&Reject);
2131        });
2132        cx.run_until_parked();
2133        assert_eq!(
2134            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2135            "abc\ndEf\nghi\njkl\njkL\nmno\npqr\nPqr\nstu\nvwx\nyz"
2136        );
2137        assert_eq!(
2138            editor1
2139                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
2140                .range(),
2141            Point::new(3, 0)..Point::new(3, 0)
2142        );
2143
2144        // Keeping a range that doesn't intersect the current selection doesn't move it.
2145        editor1.update_in(cx, |editor, window, cx| {
2146            let buffer = editor.buffer().read(cx);
2147            let position = buffer.read(cx).anchor_before(Point::new(7, 0));
2148            let snapshot = buffer.snapshot(cx);
2149            keep_edits_in_ranges(
2150                editor,
2151                &snapshot,
2152                &agent.read(cx).action_log(),
2153                vec![position..position],
2154                window,
2155                cx,
2156            )
2157        });
2158        cx.run_until_parked();
2159        assert_eq!(
2160            editor1.read_with(cx, |editor, cx| editor.text(cx)),
2161            "abc\ndEf\nghi\njkl\njkL\nmno\nPqr\nstu\nvwx\nyz"
2162        );
2163        assert_eq!(
2164            editor1
2165                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
2166                .range(),
2167            Point::new(3, 0)..Point::new(3, 0)
2168        );
2169
2170        // Reviewing the last change opens the next changed buffer
2171        workspace
2172            .update_in(cx, |workspace, window, cx| {
2173                AgentDiff::global(cx).update(cx, |agent_diff, cx| {
2174                    agent_diff.review_in_active_editor(workspace, AgentDiff::keep, window, cx)
2175                })
2176            })
2177            .unwrap()
2178            .await
2179            .unwrap();
2180
2181        cx.run_until_parked();
2182
2183        let editor2 = workspace.update(cx, |workspace, cx| {
2184            workspace.active_item_as::<Editor>(cx).unwrap()
2185        });
2186
2187        let editor2_path = editor2
2188            .read_with(cx, |editor, cx| editor.project_path(cx))
2189            .unwrap();
2190        assert_eq!(editor2_path, buffer_path2);
2191
2192        assert_eq!(
2193            editor2.read_with(cx, |editor, cx| editor.text(cx)),
2194            "abc\nAbc\ndef\nghi\ngHi"
2195        );
2196        assert_eq!(
2197            editor2
2198                .update(cx, |editor, cx| editor.selections.newest::<Point>(cx))
2199                .range(),
2200            Point::new(0, 0)..Point::new(0, 0)
2201        );
2202
2203        // Editor 1 toolbar is hidden since all changes have been reviewed
2204        workspace.update_in(cx, |workspace, window, cx| {
2205            workspace.activate_item(&editor1, true, true, window, cx)
2206        });
2207
2208        assert!(diff_toolbar.read_with(cx, |toolbar, _cx| matches!(
2209            toolbar.active_item,
2210            Some(AgentDiffToolbarItem::Editor {
2211                state: EditorState::Idle,
2212                ..
2213            })
2214        )));
2215        assert_eq!(
2216            diff_toolbar.read_with(cx, |toolbar, cx| toolbar.location(cx)),
2217            ToolbarItemLocation::Hidden
2218        );
2219    }
2220
2221    fn override_toolbar_agent_review_setting(active: bool, cx: &mut VisualTestContext) {
2222        cx.update(|_window, cx| {
2223            SettingsStore::update_global(cx, |store, _cx| {
2224                let mut editor_settings = store.get::<EditorSettings>(None).clone();
2225                editor_settings.toolbar.agent_review = active;
2226                store.override_global(editor_settings);
2227            })
2228        });
2229        cx.run_until_parked();
2230    }
2231}