pane.rs

   1use crate::{
   2    CloseWindow, NewFile, NewTerminal, OpenInTerminal, OpenOptions, OpenTerminal, OpenVisible,
   3    SplitDirection, ToggleFileFinder, ToggleProjectSymbols, ToggleZoom, Workspace,
   4    WorkspaceItemBuilder,
   5    invalid_buffer_view::InvalidBufferView,
   6    item::{
   7        ActivateOnClose, ClosePosition, Item, ItemBufferKind, ItemHandle, ItemSettings,
   8        PreviewTabsSettings, ProjectItemKind, SaveOptions, ShowCloseButton, ShowDiagnostics,
   9        TabContentParams, TabTooltipContent, WeakItemHandle,
  10    },
  11    move_item,
  12    notifications::NotifyResultExt,
  13    toolbar::Toolbar,
  14    workspace_settings::{AutosaveSetting, TabBarSettings, WorkspaceSettings},
  15};
  16use anyhow::Result;
  17use collections::{BTreeSet, HashMap, HashSet, VecDeque};
  18use futures::{StreamExt, stream::FuturesUnordered};
  19use gpui::{
  20    Action, AnyElement, App, AsyncWindowContext, ClickEvent, ClipboardItem, Context, Corner, Div,
  21    DragMoveEvent, Entity, EntityId, EventEmitter, ExternalPaths, FocusHandle, FocusOutEvent,
  22    Focusable, IsZero, KeyContext, MouseButton, MouseDownEvent, NavigationDirection, Pixels, Point,
  23    PromptLevel, Render, ScrollHandle, Subscription, Task, WeakEntity, WeakFocusHandle, Window,
  24    actions, anchored, deferred, prelude::*,
  25};
  26use itertools::Itertools;
  27use language::DiagnosticSeverity;
  28use parking_lot::Mutex;
  29use project::{DirectoryLister, Project, ProjectEntryId, ProjectPath, WorktreeId};
  30use schemars::JsonSchema;
  31use serde::Deserialize;
  32use settings::{Settings, SettingsStore};
  33use std::{
  34    any::Any,
  35    cmp, fmt, mem,
  36    num::NonZeroUsize,
  37    ops::ControlFlow,
  38    path::PathBuf,
  39    rc::Rc,
  40    sync::{
  41        Arc,
  42        atomic::{AtomicUsize, Ordering},
  43    },
  44    time::Duration,
  45};
  46use theme::ThemeSettings;
  47use ui::{
  48    ButtonSize, Color, ContextMenu, ContextMenuEntry, ContextMenuItem, DecoratedIcon, IconButton,
  49    IconButtonShape, IconDecoration, IconDecorationKind, IconName, IconSize, Indicator, Label,
  50    PopoverMenu, PopoverMenuHandle, Tab, TabBar, TabPosition, Tooltip, prelude::*,
  51    right_click_menu,
  52};
  53use util::{ResultExt, debug_panic, maybe, paths::PathStyle, truncate_and_remove_front};
  54
  55/// A selected entry in e.g. project panel.
  56#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
  57pub struct SelectedEntry {
  58    pub worktree_id: WorktreeId,
  59    pub entry_id: ProjectEntryId,
  60}
  61
  62/// A group of selected entries from project panel.
  63#[derive(Debug)]
  64pub struct DraggedSelection {
  65    pub active_selection: SelectedEntry,
  66    pub marked_selections: Arc<[SelectedEntry]>,
  67}
  68
  69impl DraggedSelection {
  70    pub fn items<'a>(&'a self) -> Box<dyn Iterator<Item = &'a SelectedEntry> + 'a> {
  71        if self.marked_selections.contains(&self.active_selection) {
  72            Box::new(self.marked_selections.iter())
  73        } else {
  74            Box::new(std::iter::once(&self.active_selection))
  75        }
  76    }
  77}
  78
  79#[derive(Clone, Copy, PartialEq, Debug, Deserialize, JsonSchema)]
  80#[serde(rename_all = "snake_case")]
  81pub enum SaveIntent {
  82    /// write all files (even if unchanged)
  83    /// prompt before overwriting on-disk changes
  84    Save,
  85    /// same as Save, but without auto formatting
  86    SaveWithoutFormat,
  87    /// write any files that have local changes
  88    /// prompt before overwriting on-disk changes
  89    SaveAll,
  90    /// always prompt for a new path
  91    SaveAs,
  92    /// prompt "you have unsaved changes" before writing
  93    Close,
  94    /// write all dirty files, don't prompt on conflict
  95    Overwrite,
  96    /// skip all save-related behavior
  97    Skip,
  98}
  99
 100/// Activates a specific item in the pane by its index.
 101#[derive(Clone, PartialEq, Debug, Deserialize, JsonSchema, Default, Action)]
 102#[action(namespace = pane)]
 103pub struct ActivateItem(pub usize);
 104
 105/// Closes the currently active item in the pane.
 106#[derive(Clone, PartialEq, Debug, Deserialize, JsonSchema, Default, Action)]
 107#[action(namespace = pane)]
 108#[serde(deny_unknown_fields)]
 109pub struct CloseActiveItem {
 110    #[serde(default)]
 111    pub save_intent: Option<SaveIntent>,
 112    #[serde(default)]
 113    pub close_pinned: bool,
 114}
 115
 116/// Closes all inactive items in the pane.
 117#[derive(Clone, PartialEq, Debug, Deserialize, JsonSchema, Default, Action)]
 118#[action(namespace = pane)]
 119#[serde(deny_unknown_fields)]
 120#[action(deprecated_aliases = ["pane::CloseInactiveItems"])]
 121pub struct CloseOtherItems {
 122    #[serde(default)]
 123    pub save_intent: Option<SaveIntent>,
 124    #[serde(default)]
 125    pub close_pinned: bool,
 126}
 127
 128/// Closes all multibuffers in the pane.
 129#[derive(Clone, PartialEq, Debug, Deserialize, JsonSchema, Default, Action)]
 130#[action(namespace = pane)]
 131#[serde(deny_unknown_fields)]
 132pub struct CloseMultibufferItems {
 133    #[serde(default)]
 134    pub save_intent: Option<SaveIntent>,
 135    #[serde(default)]
 136    pub close_pinned: bool,
 137}
 138
 139/// Closes all items in the pane.
 140#[derive(Clone, PartialEq, Debug, Deserialize, JsonSchema, Default, Action)]
 141#[action(namespace = pane)]
 142#[serde(deny_unknown_fields)]
 143pub struct CloseAllItems {
 144    #[serde(default)]
 145    pub save_intent: Option<SaveIntent>,
 146    #[serde(default)]
 147    pub close_pinned: bool,
 148}
 149
 150/// Closes all items that have no unsaved changes.
 151#[derive(Clone, PartialEq, Debug, Deserialize, JsonSchema, Default, Action)]
 152#[action(namespace = pane)]
 153#[serde(deny_unknown_fields)]
 154pub struct CloseCleanItems {
 155    #[serde(default)]
 156    pub close_pinned: bool,
 157}
 158
 159/// Closes all items to the right of the current item.
 160#[derive(Clone, PartialEq, Debug, Deserialize, JsonSchema, Default, Action)]
 161#[action(namespace = pane)]
 162#[serde(deny_unknown_fields)]
 163pub struct CloseItemsToTheRight {
 164    #[serde(default)]
 165    pub close_pinned: bool,
 166}
 167
 168/// Closes all items to the left of the current item.
 169#[derive(Clone, PartialEq, Debug, Deserialize, JsonSchema, Default, Action)]
 170#[action(namespace = pane)]
 171#[serde(deny_unknown_fields)]
 172pub struct CloseItemsToTheLeft {
 173    #[serde(default)]
 174    pub close_pinned: bool,
 175}
 176
 177/// Reveals the current item in the project panel.
 178#[derive(Clone, PartialEq, Debug, Deserialize, JsonSchema, Default, Action)]
 179#[action(namespace = pane)]
 180#[serde(deny_unknown_fields)]
 181pub struct RevealInProjectPanel {
 182    #[serde(skip)]
 183    pub entry_id: Option<u64>,
 184}
 185
 186/// Opens the search interface with the specified configuration.
 187#[derive(Clone, PartialEq, Debug, Deserialize, JsonSchema, Default, Action)]
 188#[action(namespace = pane)]
 189#[serde(deny_unknown_fields)]
 190pub struct DeploySearch {
 191    #[serde(default)]
 192    pub replace_enabled: bool,
 193    #[serde(default)]
 194    pub included_files: Option<String>,
 195    #[serde(default)]
 196    pub excluded_files: Option<String>,
 197}
 198
 199actions!(
 200    pane,
 201    [
 202        /// Activates the previous item in the pane.
 203        ActivatePreviousItem,
 204        /// Activates the next item in the pane.
 205        ActivateNextItem,
 206        /// Activates the last item in the pane.
 207        ActivateLastItem,
 208        /// Switches to the alternate file.
 209        AlternateFile,
 210        /// Navigates back in history.
 211        GoBack,
 212        /// Navigates forward in history.
 213        GoForward,
 214        /// Joins this pane into the next pane.
 215        JoinIntoNext,
 216        /// Joins all panes into one.
 217        JoinAll,
 218        /// Reopens the most recently closed item.
 219        ReopenClosedItem,
 220        /// Splits the pane to the left, cloning the current item.
 221        SplitLeft,
 222        /// Splits the pane upward, cloning the current item.
 223        SplitUp,
 224        /// Splits the pane to the right, cloning the current item.
 225        SplitRight,
 226        /// Splits the pane downward, cloning the current item.
 227        SplitDown,
 228        /// Splits the pane to the left, moving the current item.
 229        SplitAndMoveLeft,
 230        /// Splits the pane upward, moving the current item.
 231        SplitAndMoveUp,
 232        /// Splits the pane to the right, moving the current item.
 233        SplitAndMoveRight,
 234        /// Splits the pane downward, moving the current item.
 235        SplitAndMoveDown,
 236        /// Splits the pane horizontally.
 237        SplitHorizontal,
 238        /// Splits the pane vertically.
 239        SplitVertical,
 240        /// Swaps the current item with the one to the left.
 241        SwapItemLeft,
 242        /// Swaps the current item with the one to the right.
 243        SwapItemRight,
 244        /// Toggles preview mode for the current tab.
 245        TogglePreviewTab,
 246        /// Toggles pin status for the current tab.
 247        TogglePinTab,
 248        /// Unpins all tabs in the pane.
 249        UnpinAllTabs,
 250    ]
 251);
 252
 253impl DeploySearch {
 254    pub fn find() -> Self {
 255        Self {
 256            replace_enabled: false,
 257            included_files: None,
 258            excluded_files: None,
 259        }
 260    }
 261}
 262
 263const MAX_NAVIGATION_HISTORY_LEN: usize = 1024;
 264
 265pub enum Event {
 266    AddItem {
 267        item: Box<dyn ItemHandle>,
 268    },
 269    ActivateItem {
 270        local: bool,
 271        focus_changed: bool,
 272    },
 273    Remove {
 274        focus_on_pane: Option<Entity<Pane>>,
 275    },
 276    RemovedItem {
 277        item: Box<dyn ItemHandle>,
 278    },
 279    Split {
 280        direction: SplitDirection,
 281        clone_active_item: bool,
 282    },
 283    ItemPinned,
 284    ItemUnpinned,
 285    JoinAll,
 286    JoinIntoNext,
 287    ChangeItemTitle,
 288    Focus,
 289    ZoomIn,
 290    ZoomOut,
 291    UserSavedItem {
 292        item: Box<dyn WeakItemHandle>,
 293        save_intent: SaveIntent,
 294    },
 295}
 296
 297impl fmt::Debug for Event {
 298    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 299        match self {
 300            Event::AddItem { item } => f
 301                .debug_struct("AddItem")
 302                .field("item", &item.item_id())
 303                .finish(),
 304            Event::ActivateItem { local, .. } => f
 305                .debug_struct("ActivateItem")
 306                .field("local", local)
 307                .finish(),
 308            Event::Remove { .. } => f.write_str("Remove"),
 309            Event::RemovedItem { item } => f
 310                .debug_struct("RemovedItem")
 311                .field("item", &item.item_id())
 312                .finish(),
 313            Event::Split {
 314                direction,
 315                clone_active_item,
 316            } => f
 317                .debug_struct("Split")
 318                .field("direction", direction)
 319                .field("clone_active_item", clone_active_item)
 320                .finish(),
 321            Event::JoinAll => f.write_str("JoinAll"),
 322            Event::JoinIntoNext => f.write_str("JoinIntoNext"),
 323            Event::ChangeItemTitle => f.write_str("ChangeItemTitle"),
 324            Event::Focus => f.write_str("Focus"),
 325            Event::ZoomIn => f.write_str("ZoomIn"),
 326            Event::ZoomOut => f.write_str("ZoomOut"),
 327            Event::UserSavedItem { item, save_intent } => f
 328                .debug_struct("UserSavedItem")
 329                .field("item", &item.id())
 330                .field("save_intent", save_intent)
 331                .finish(),
 332            Event::ItemPinned => f.write_str("ItemPinned"),
 333            Event::ItemUnpinned => f.write_str("ItemUnpinned"),
 334        }
 335    }
 336}
 337
 338/// A container for 0 to many items that are open in the workspace.
 339/// Treats all items uniformly via the [`ItemHandle`] trait, whether it's an editor, search results multibuffer, terminal or something else,
 340/// responsible for managing item tabs, focus and zoom states and drag and drop features.
 341/// Can be split, see `PaneGroup` for more details.
 342pub struct Pane {
 343    alternate_file_items: (
 344        Option<Box<dyn WeakItemHandle>>,
 345        Option<Box<dyn WeakItemHandle>>,
 346    ),
 347    focus_handle: FocusHandle,
 348    items: Vec<Box<dyn ItemHandle>>,
 349    activation_history: Vec<ActivationHistoryEntry>,
 350    next_activation_timestamp: Arc<AtomicUsize>,
 351    zoomed: bool,
 352    was_focused: bool,
 353    active_item_index: usize,
 354    preview_item_id: Option<EntityId>,
 355    last_focus_handle_by_item: HashMap<EntityId, WeakFocusHandle>,
 356    nav_history: NavHistory,
 357    toolbar: Entity<Toolbar>,
 358    pub(crate) workspace: WeakEntity<Workspace>,
 359    project: WeakEntity<Project>,
 360    pub drag_split_direction: Option<SplitDirection>,
 361    can_drop_predicate: Option<Arc<dyn Fn(&dyn Any, &mut Window, &mut App) -> bool>>,
 362    custom_drop_handle: Option<
 363        Arc<dyn Fn(&mut Pane, &dyn Any, &mut Window, &mut Context<Pane>) -> ControlFlow<(), ()>>,
 364    >,
 365    can_split_predicate:
 366        Option<Arc<dyn Fn(&mut Self, &dyn Any, &mut Window, &mut Context<Self>) -> bool>>,
 367    can_toggle_zoom: bool,
 368    should_display_tab_bar: Rc<dyn Fn(&Window, &mut Context<Pane>) -> bool>,
 369    render_tab_bar_buttons: Rc<
 370        dyn Fn(
 371            &mut Pane,
 372            &mut Window,
 373            &mut Context<Pane>,
 374        ) -> (Option<AnyElement>, Option<AnyElement>),
 375    >,
 376    render_tab_bar: Rc<dyn Fn(&mut Pane, &mut Window, &mut Context<Pane>) -> AnyElement>,
 377    show_tab_bar_buttons: bool,
 378    max_tabs: Option<NonZeroUsize>,
 379    _subscriptions: Vec<Subscription>,
 380    tab_bar_scroll_handle: ScrollHandle,
 381    /// This is set to true if a user scroll has occurred more recently than a system scroll
 382    /// We want to suppress certain system scrolls when the user has intentionally scrolled
 383    suppress_scroll: bool,
 384    /// Is None if navigation buttons are permanently turned off (and should not react to setting changes).
 385    /// Otherwise, when `display_nav_history_buttons` is Some, it determines whether nav buttons should be displayed.
 386    display_nav_history_buttons: Option<bool>,
 387    double_click_dispatch_action: Box<dyn Action>,
 388    save_modals_spawned: HashSet<EntityId>,
 389    close_pane_if_empty: bool,
 390    pub new_item_context_menu_handle: PopoverMenuHandle<ContextMenu>,
 391    pub split_item_context_menu_handle: PopoverMenuHandle<ContextMenu>,
 392    pinned_tab_count: usize,
 393    diagnostics: HashMap<ProjectPath, DiagnosticSeverity>,
 394    zoom_out_on_close: bool,
 395    diagnostic_summary_update: Task<()>,
 396    /// If a certain project item wants to get recreated with specific data, it can persist its data before the recreation here.
 397    pub project_item_restoration_data: HashMap<ProjectItemKind, Box<dyn Any + Send>>,
 398}
 399
 400pub struct ActivationHistoryEntry {
 401    pub entity_id: EntityId,
 402    pub timestamp: usize,
 403}
 404
 405pub struct ItemNavHistory {
 406    history: NavHistory,
 407    item: Arc<dyn WeakItemHandle>,
 408    is_preview: bool,
 409}
 410
 411#[derive(Clone)]
 412pub struct NavHistory(Arc<Mutex<NavHistoryState>>);
 413
 414struct NavHistoryState {
 415    mode: NavigationMode,
 416    backward_stack: VecDeque<NavigationEntry>,
 417    forward_stack: VecDeque<NavigationEntry>,
 418    closed_stack: VecDeque<NavigationEntry>,
 419    paths_by_item: HashMap<EntityId, (ProjectPath, Option<PathBuf>)>,
 420    pane: WeakEntity<Pane>,
 421    next_timestamp: Arc<AtomicUsize>,
 422}
 423
 424#[derive(Debug, Copy, Clone)]
 425pub enum NavigationMode {
 426    Normal,
 427    GoingBack,
 428    GoingForward,
 429    ClosingItem,
 430    ReopeningClosedItem,
 431    Disabled,
 432}
 433
 434impl Default for NavigationMode {
 435    fn default() -> Self {
 436        Self::Normal
 437    }
 438}
 439
 440pub struct NavigationEntry {
 441    pub item: Arc<dyn WeakItemHandle>,
 442    pub data: Option<Box<dyn Any + Send>>,
 443    pub timestamp: usize,
 444    pub is_preview: bool,
 445}
 446
 447#[derive(Clone)]
 448pub struct DraggedTab {
 449    pub pane: Entity<Pane>,
 450    pub item: Box<dyn ItemHandle>,
 451    pub ix: usize,
 452    pub detail: usize,
 453    pub is_active: bool,
 454}
 455
 456impl EventEmitter<Event> for Pane {}
 457
 458pub enum Side {
 459    Left,
 460    Right,
 461}
 462
 463#[derive(Copy, Clone)]
 464enum PinOperation {
 465    Pin,
 466    Unpin,
 467}
 468
 469impl Pane {
 470    pub fn new(
 471        workspace: WeakEntity<Workspace>,
 472        project: Entity<Project>,
 473        next_timestamp: Arc<AtomicUsize>,
 474        can_drop_predicate: Option<Arc<dyn Fn(&dyn Any, &mut Window, &mut App) -> bool + 'static>>,
 475        double_click_dispatch_action: Box<dyn Action>,
 476        window: &mut Window,
 477        cx: &mut Context<Self>,
 478    ) -> Self {
 479        let focus_handle = cx.focus_handle();
 480
 481        let subscriptions = vec![
 482            cx.on_focus(&focus_handle, window, Pane::focus_in),
 483            cx.on_focus_in(&focus_handle, window, Pane::focus_in),
 484            cx.on_focus_out(&focus_handle, window, Pane::focus_out),
 485            cx.observe_global_in::<SettingsStore>(window, Self::settings_changed),
 486            cx.subscribe(&project, Self::project_events),
 487        ];
 488
 489        let handle = cx.entity().downgrade();
 490
 491        Self {
 492            alternate_file_items: (None, None),
 493            focus_handle,
 494            items: Vec::new(),
 495            activation_history: Vec::new(),
 496            next_activation_timestamp: next_timestamp.clone(),
 497            was_focused: false,
 498            zoomed: false,
 499            active_item_index: 0,
 500            preview_item_id: None,
 501            max_tabs: WorkspaceSettings::get_global(cx).max_tabs,
 502            last_focus_handle_by_item: Default::default(),
 503            nav_history: NavHistory(Arc::new(Mutex::new(NavHistoryState {
 504                mode: NavigationMode::Normal,
 505                backward_stack: Default::default(),
 506                forward_stack: Default::default(),
 507                closed_stack: Default::default(),
 508                paths_by_item: Default::default(),
 509                pane: handle,
 510                next_timestamp,
 511            }))),
 512            toolbar: cx.new(|_| Toolbar::new()),
 513            tab_bar_scroll_handle: ScrollHandle::new(),
 514            suppress_scroll: false,
 515            drag_split_direction: None,
 516            workspace,
 517            project: project.downgrade(),
 518            can_drop_predicate,
 519            custom_drop_handle: None,
 520            can_split_predicate: None,
 521            can_toggle_zoom: true,
 522            should_display_tab_bar: Rc::new(|_, cx| TabBarSettings::get_global(cx).show),
 523            render_tab_bar_buttons: Rc::new(default_render_tab_bar_buttons),
 524            render_tab_bar: Rc::new(Self::render_tab_bar),
 525            show_tab_bar_buttons: TabBarSettings::get_global(cx).show_tab_bar_buttons,
 526            display_nav_history_buttons: Some(
 527                TabBarSettings::get_global(cx).show_nav_history_buttons,
 528            ),
 529            _subscriptions: subscriptions,
 530            double_click_dispatch_action,
 531            save_modals_spawned: HashSet::default(),
 532            close_pane_if_empty: true,
 533            split_item_context_menu_handle: Default::default(),
 534            new_item_context_menu_handle: Default::default(),
 535            pinned_tab_count: 0,
 536            diagnostics: Default::default(),
 537            zoom_out_on_close: true,
 538            diagnostic_summary_update: Task::ready(()),
 539            project_item_restoration_data: HashMap::default(),
 540        }
 541    }
 542
 543    fn alternate_file(&mut self, _: &AlternateFile, window: &mut Window, cx: &mut Context<Pane>) {
 544        let (_, alternative) = &self.alternate_file_items;
 545        if let Some(alternative) = alternative {
 546            let existing = self
 547                .items()
 548                .find_position(|item| item.item_id() == alternative.id());
 549            if let Some((ix, _)) = existing {
 550                self.activate_item(ix, true, true, window, cx);
 551            } else if let Some(upgraded) = alternative.upgrade() {
 552                self.add_item(upgraded, true, true, None, window, cx);
 553            }
 554        }
 555    }
 556
 557    pub fn track_alternate_file_items(&mut self) {
 558        if let Some(item) = self.active_item().map(|item| item.downgrade_item()) {
 559            let (current, _) = &self.alternate_file_items;
 560            match current {
 561                Some(current) => {
 562                    if current.id() != item.id() {
 563                        self.alternate_file_items =
 564                            (Some(item), self.alternate_file_items.0.take());
 565                    }
 566                }
 567                None => {
 568                    self.alternate_file_items = (Some(item), None);
 569                }
 570            }
 571        }
 572    }
 573
 574    pub fn has_focus(&self, window: &Window, cx: &App) -> bool {
 575        // We not only check whether our focus handle contains focus, but also
 576        // whether the active item might have focus, because we might have just activated an item
 577        // that hasn't rendered yet.
 578        // Before the next render, we might transfer focus
 579        // to the item, and `focus_handle.contains_focus` returns false because the `active_item`
 580        // is not hooked up to us in the dispatch tree.
 581        self.focus_handle.contains_focused(window, cx)
 582            || self
 583                .active_item()
 584                .is_some_and(|item| item.item_focus_handle(cx).contains_focused(window, cx))
 585    }
 586
 587    fn focus_in(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 588        if !self.was_focused {
 589            self.was_focused = true;
 590            self.update_history(self.active_item_index);
 591            if !self.suppress_scroll && self.items.get(self.active_item_index).is_some() {
 592                self.update_active_tab(self.active_item_index);
 593            }
 594            cx.emit(Event::Focus);
 595            cx.notify();
 596        }
 597
 598        self.toolbar.update(cx, |toolbar, cx| {
 599            toolbar.focus_changed(true, window, cx);
 600        });
 601
 602        if let Some(active_item) = self.active_item() {
 603            if self.focus_handle.is_focused(window) {
 604                // Schedule a redraw next frame, so that the focus changes below take effect
 605                cx.on_next_frame(window, |_, _, cx| {
 606                    cx.notify();
 607                });
 608
 609                // Pane was focused directly. We need to either focus a view inside the active item,
 610                // or focus the active item itself
 611                if let Some(weak_last_focus_handle) =
 612                    self.last_focus_handle_by_item.get(&active_item.item_id())
 613                    && let Some(focus_handle) = weak_last_focus_handle.upgrade()
 614                {
 615                    focus_handle.focus(window);
 616                    return;
 617                }
 618
 619                active_item.item_focus_handle(cx).focus(window);
 620            } else if let Some(focused) = window.focused(cx)
 621                && !self.context_menu_focused(window, cx)
 622            {
 623                self.last_focus_handle_by_item
 624                    .insert(active_item.item_id(), focused.downgrade());
 625            }
 626        }
 627    }
 628
 629    pub fn context_menu_focused(&self, window: &mut Window, cx: &mut Context<Self>) -> bool {
 630        self.new_item_context_menu_handle.is_focused(window, cx)
 631            || self.split_item_context_menu_handle.is_focused(window, cx)
 632    }
 633
 634    fn focus_out(&mut self, _event: FocusOutEvent, window: &mut Window, cx: &mut Context<Self>) {
 635        self.was_focused = false;
 636        self.toolbar.update(cx, |toolbar, cx| {
 637            toolbar.focus_changed(false, window, cx);
 638        });
 639
 640        cx.notify();
 641    }
 642
 643    fn project_events(
 644        &mut self,
 645        _project: Entity<Project>,
 646        event: &project::Event,
 647        cx: &mut Context<Self>,
 648    ) {
 649        match event {
 650            project::Event::DiskBasedDiagnosticsFinished { .. }
 651            | project::Event::DiagnosticsUpdated { .. } => {
 652                if ItemSettings::get_global(cx).show_diagnostics != ShowDiagnostics::Off {
 653                    self.diagnostic_summary_update = cx.spawn(async move |this, cx| {
 654                        cx.background_executor()
 655                            .timer(Duration::from_millis(30))
 656                            .await;
 657                        this.update(cx, |this, cx| {
 658                            this.update_diagnostics(cx);
 659                            cx.notify();
 660                        })
 661                        .log_err();
 662                    });
 663                }
 664            }
 665            _ => {}
 666        }
 667    }
 668
 669    fn update_diagnostics(&mut self, cx: &mut Context<Self>) {
 670        let Some(project) = self.project.upgrade() else {
 671            return;
 672        };
 673        let show_diagnostics = ItemSettings::get_global(cx).show_diagnostics;
 674        self.diagnostics = if show_diagnostics != ShowDiagnostics::Off {
 675            project
 676                .read(cx)
 677                .diagnostic_summaries(false, cx)
 678                .filter_map(|(project_path, _, diagnostic_summary)| {
 679                    if diagnostic_summary.error_count > 0 {
 680                        Some((project_path, DiagnosticSeverity::ERROR))
 681                    } else if diagnostic_summary.warning_count > 0
 682                        && show_diagnostics != ShowDiagnostics::Errors
 683                    {
 684                        Some((project_path, DiagnosticSeverity::WARNING))
 685                    } else {
 686                        None
 687                    }
 688                })
 689                .collect()
 690        } else {
 691            HashMap::default()
 692        }
 693    }
 694
 695    fn settings_changed(&mut self, window: &mut Window, cx: &mut Context<Self>) {
 696        let tab_bar_settings = TabBarSettings::get_global(cx);
 697        let new_max_tabs = WorkspaceSettings::get_global(cx).max_tabs;
 698
 699        if let Some(display_nav_history_buttons) = self.display_nav_history_buttons.as_mut() {
 700            *display_nav_history_buttons = tab_bar_settings.show_nav_history_buttons;
 701        }
 702
 703        self.show_tab_bar_buttons = tab_bar_settings.show_tab_bar_buttons;
 704
 705        if !PreviewTabsSettings::get_global(cx).enabled {
 706            self.preview_item_id = None;
 707        }
 708
 709        if new_max_tabs != self.max_tabs {
 710            self.max_tabs = new_max_tabs;
 711            self.close_items_on_settings_change(window, cx);
 712        }
 713
 714        self.update_diagnostics(cx);
 715        cx.notify();
 716    }
 717
 718    pub fn active_item_index(&self) -> usize {
 719        self.active_item_index
 720    }
 721
 722    pub fn activation_history(&self) -> &[ActivationHistoryEntry] {
 723        &self.activation_history
 724    }
 725
 726    pub fn set_should_display_tab_bar<F>(&mut self, should_display_tab_bar: F)
 727    where
 728        F: 'static + Fn(&Window, &mut Context<Pane>) -> bool,
 729    {
 730        self.should_display_tab_bar = Rc::new(should_display_tab_bar);
 731    }
 732
 733    pub fn set_can_split(
 734        &mut self,
 735        can_split_predicate: Option<
 736            Arc<dyn Fn(&mut Self, &dyn Any, &mut Window, &mut Context<Self>) -> bool + 'static>,
 737        >,
 738    ) {
 739        self.can_split_predicate = can_split_predicate;
 740    }
 741
 742    pub fn set_can_toggle_zoom(&mut self, can_toggle_zoom: bool, cx: &mut Context<Self>) {
 743        self.can_toggle_zoom = can_toggle_zoom;
 744        cx.notify();
 745    }
 746
 747    pub fn set_close_pane_if_empty(&mut self, close_pane_if_empty: bool, cx: &mut Context<Self>) {
 748        self.close_pane_if_empty = close_pane_if_empty;
 749        cx.notify();
 750    }
 751
 752    pub fn set_can_navigate(&mut self, can_navigate: bool, cx: &mut Context<Self>) {
 753        self.toolbar.update(cx, |toolbar, cx| {
 754            toolbar.set_can_navigate(can_navigate, cx);
 755        });
 756        cx.notify();
 757    }
 758
 759    pub fn set_render_tab_bar<F>(&mut self, cx: &mut Context<Self>, render: F)
 760    where
 761        F: 'static + Fn(&mut Pane, &mut Window, &mut Context<Pane>) -> AnyElement,
 762    {
 763        self.render_tab_bar = Rc::new(render);
 764        cx.notify();
 765    }
 766
 767    pub fn set_render_tab_bar_buttons<F>(&mut self, cx: &mut Context<Self>, render: F)
 768    where
 769        F: 'static
 770            + Fn(
 771                &mut Pane,
 772                &mut Window,
 773                &mut Context<Pane>,
 774            ) -> (Option<AnyElement>, Option<AnyElement>),
 775    {
 776        self.render_tab_bar_buttons = Rc::new(render);
 777        cx.notify();
 778    }
 779
 780    pub fn set_custom_drop_handle<F>(&mut self, cx: &mut Context<Self>, handle: F)
 781    where
 782        F: 'static
 783            + Fn(&mut Pane, &dyn Any, &mut Window, &mut Context<Pane>) -> ControlFlow<(), ()>,
 784    {
 785        self.custom_drop_handle = Some(Arc::new(handle));
 786        cx.notify();
 787    }
 788
 789    pub fn nav_history_for_item<T: Item>(&self, item: &Entity<T>) -> ItemNavHistory {
 790        ItemNavHistory {
 791            history: self.nav_history.clone(),
 792            item: Arc::new(item.downgrade()),
 793            is_preview: self.preview_item_id == Some(item.item_id()),
 794        }
 795    }
 796
 797    pub fn nav_history(&self) -> &NavHistory {
 798        &self.nav_history
 799    }
 800
 801    pub fn nav_history_mut(&mut self) -> &mut NavHistory {
 802        &mut self.nav_history
 803    }
 804
 805    pub fn disable_history(&mut self) {
 806        self.nav_history.disable();
 807    }
 808
 809    pub fn enable_history(&mut self) {
 810        self.nav_history.enable();
 811    }
 812
 813    pub fn can_navigate_backward(&self) -> bool {
 814        !self.nav_history.0.lock().backward_stack.is_empty()
 815    }
 816
 817    pub fn can_navigate_forward(&self) -> bool {
 818        !self.nav_history.0.lock().forward_stack.is_empty()
 819    }
 820
 821    pub fn navigate_backward(&mut self, _: &GoBack, window: &mut Window, cx: &mut Context<Self>) {
 822        if let Some(workspace) = self.workspace.upgrade() {
 823            let pane = cx.entity().downgrade();
 824            window.defer(cx, move |window, cx| {
 825                workspace.update(cx, |workspace, cx| {
 826                    workspace.go_back(pane, window, cx).detach_and_log_err(cx)
 827                })
 828            })
 829        }
 830    }
 831
 832    fn navigate_forward(&mut self, _: &GoForward, window: &mut Window, cx: &mut Context<Self>) {
 833        if let Some(workspace) = self.workspace.upgrade() {
 834            let pane = cx.entity().downgrade();
 835            window.defer(cx, move |window, cx| {
 836                workspace.update(cx, |workspace, cx| {
 837                    workspace
 838                        .go_forward(pane, window, cx)
 839                        .detach_and_log_err(cx)
 840                })
 841            })
 842        }
 843    }
 844
 845    fn history_updated(&mut self, cx: &mut Context<Self>) {
 846        self.toolbar.update(cx, |_, cx| cx.notify());
 847    }
 848
 849    pub fn preview_item_id(&self) -> Option<EntityId> {
 850        self.preview_item_id
 851    }
 852
 853    pub fn preview_item(&self) -> Option<Box<dyn ItemHandle>> {
 854        self.preview_item_id
 855            .and_then(|id| self.items.iter().find(|item| item.item_id() == id))
 856            .cloned()
 857    }
 858
 859    pub fn preview_item_idx(&self) -> Option<usize> {
 860        if let Some(preview_item_id) = self.preview_item_id {
 861            self.items
 862                .iter()
 863                .position(|item| item.item_id() == preview_item_id)
 864        } else {
 865            None
 866        }
 867    }
 868
 869    pub fn is_active_preview_item(&self, item_id: EntityId) -> bool {
 870        self.preview_item_id == Some(item_id)
 871    }
 872
 873    /// Marks the item with the given ID as the preview item.
 874    /// This will be ignored if the global setting `preview_tabs` is disabled.
 875    pub fn set_preview_item_id(&mut self, item_id: Option<EntityId>, cx: &App) {
 876        if PreviewTabsSettings::get_global(cx).enabled {
 877            self.preview_item_id = item_id;
 878        }
 879    }
 880
 881    /// Should only be used when deserializing a pane.
 882    pub fn set_pinned_count(&mut self, count: usize) {
 883        self.pinned_tab_count = count;
 884    }
 885
 886    pub fn pinned_count(&self) -> usize {
 887        self.pinned_tab_count
 888    }
 889
 890    pub fn handle_item_edit(&mut self, item_id: EntityId, cx: &App) {
 891        if let Some(preview_item) = self.preview_item()
 892            && preview_item.item_id() == item_id
 893            && !preview_item.preserve_preview(cx)
 894        {
 895            self.set_preview_item_id(None, cx);
 896        }
 897    }
 898
 899    pub(crate) fn open_item(
 900        &mut self,
 901        project_entry_id: Option<ProjectEntryId>,
 902        project_path: ProjectPath,
 903        focus_item: bool,
 904        allow_preview: bool,
 905        activate: bool,
 906        suggested_position: Option<usize>,
 907        window: &mut Window,
 908        cx: &mut Context<Self>,
 909        build_item: WorkspaceItemBuilder,
 910    ) -> Box<dyn ItemHandle> {
 911        let mut existing_item = None;
 912        if let Some(project_entry_id) = project_entry_id {
 913            for (index, item) in self.items.iter().enumerate() {
 914                if item.buffer_kind(cx) == ItemBufferKind::Singleton
 915                    && item.project_entry_ids(cx).as_slice() == [project_entry_id]
 916                {
 917                    let item = item.boxed_clone();
 918                    existing_item = Some((index, item));
 919                    break;
 920                }
 921            }
 922        } else {
 923            for (index, item) in self.items.iter().enumerate() {
 924                if item.buffer_kind(cx) == ItemBufferKind::Singleton
 925                    && item.project_path(cx).as_ref() == Some(&project_path)
 926                {
 927                    let item = item.boxed_clone();
 928                    existing_item = Some((index, item));
 929                    break;
 930                }
 931            }
 932        }
 933
 934        let set_up_existing_item =
 935            |index: usize, pane: &mut Self, window: &mut Window, cx: &mut Context<Self>| {
 936                // If the item is already open, and the item is a preview item
 937                // and we are not allowing items to open as preview, mark the item as persistent.
 938                if let Some(preview_item_id) = pane.preview_item_id
 939                    && let Some(tab) = pane.items.get(index)
 940                    && tab.item_id() == preview_item_id
 941                    && !allow_preview
 942                {
 943                    pane.set_preview_item_id(None, cx);
 944                }
 945                if activate {
 946                    pane.activate_item(index, focus_item, focus_item, window, cx);
 947                }
 948            };
 949        let set_up_new_item = |new_item: Box<dyn ItemHandle>,
 950                               destination_index: Option<usize>,
 951                               pane: &mut Self,
 952                               window: &mut Window,
 953                               cx: &mut Context<Self>| {
 954            if allow_preview {
 955                pane.set_preview_item_id(Some(new_item.item_id()), cx);
 956            }
 957            pane.add_item_inner(
 958                new_item,
 959                true,
 960                focus_item,
 961                activate,
 962                destination_index,
 963                window,
 964                cx,
 965            );
 966        };
 967
 968        if let Some((index, existing_item)) = existing_item {
 969            set_up_existing_item(index, self, window, cx);
 970            existing_item
 971        } else {
 972            // If the item is being opened as preview and we have an existing preview tab,
 973            // open the new item in the position of the existing preview tab.
 974            let destination_index = if allow_preview {
 975                self.close_current_preview_item(window, cx)
 976            } else {
 977                suggested_position
 978            };
 979
 980            let new_item = build_item(self, window, cx);
 981            // A special case that won't ever get a `project_entry_id` but has to be deduplicated nonetheless.
 982            if let Some(invalid_buffer_view) = new_item.downcast::<InvalidBufferView>() {
 983                let mut already_open_view = None;
 984                let mut views_to_close = HashSet::default();
 985                for existing_error_view in self
 986                    .items_of_type::<InvalidBufferView>()
 987                    .filter(|item| item.read(cx).abs_path == invalid_buffer_view.read(cx).abs_path)
 988                {
 989                    if already_open_view.is_none()
 990                        && existing_error_view.read(cx).error == invalid_buffer_view.read(cx).error
 991                    {
 992                        already_open_view = Some(existing_error_view);
 993                    } else {
 994                        views_to_close.insert(existing_error_view.item_id());
 995                    }
 996                }
 997
 998                let resulting_item = match already_open_view {
 999                    Some(already_open_view) => {
1000                        if let Some(index) = self.index_for_item_id(already_open_view.item_id()) {
1001                            set_up_existing_item(index, self, window, cx);
1002                        }
1003                        Box::new(already_open_view) as Box<_>
1004                    }
1005                    None => {
1006                        set_up_new_item(new_item.clone(), destination_index, self, window, cx);
1007                        new_item
1008                    }
1009                };
1010
1011                self.close_items(window, cx, SaveIntent::Skip, |existing_item| {
1012                    views_to_close.contains(&existing_item)
1013                })
1014                .detach();
1015
1016                resulting_item
1017            } else {
1018                set_up_new_item(new_item.clone(), destination_index, self, window, cx);
1019                new_item
1020            }
1021        }
1022    }
1023
1024    pub fn close_current_preview_item(
1025        &mut self,
1026        window: &mut Window,
1027        cx: &mut Context<Self>,
1028    ) -> Option<usize> {
1029        let item_idx = self.preview_item_idx()?;
1030        let id = self.preview_item_id()?;
1031
1032        let prev_active_item_index = self.active_item_index;
1033        self.remove_item(id, false, false, window, cx);
1034        self.active_item_index = prev_active_item_index;
1035
1036        if item_idx < self.items.len() {
1037            Some(item_idx)
1038        } else {
1039            None
1040        }
1041    }
1042
1043    pub fn add_item_inner(
1044        &mut self,
1045        item: Box<dyn ItemHandle>,
1046        activate_pane: bool,
1047        focus_item: bool,
1048        activate: bool,
1049        destination_index: Option<usize>,
1050        window: &mut Window,
1051        cx: &mut Context<Self>,
1052    ) {
1053        let item_already_exists = self
1054            .items
1055            .iter()
1056            .any(|existing_item| existing_item.item_id() == item.item_id());
1057
1058        if !item_already_exists {
1059            self.close_items_on_item_open(window, cx);
1060        }
1061
1062        if item.buffer_kind(cx) == ItemBufferKind::Singleton
1063            && let Some(&entry_id) = item.project_entry_ids(cx).first()
1064        {
1065            let Some(project) = self.project.upgrade() else {
1066                return;
1067            };
1068
1069            let project = project.read(cx);
1070            if let Some(project_path) = project.path_for_entry(entry_id, cx) {
1071                let abs_path = project.absolute_path(&project_path, cx);
1072                self.nav_history
1073                    .0
1074                    .lock()
1075                    .paths_by_item
1076                    .insert(item.item_id(), (project_path, abs_path));
1077            }
1078        }
1079        // If no destination index is specified, add or move the item after the
1080        // active item (or at the start of tab bar, if the active item is pinned)
1081        let mut insertion_index = {
1082            cmp::min(
1083                if let Some(destination_index) = destination_index {
1084                    destination_index
1085                } else {
1086                    cmp::max(self.active_item_index + 1, self.pinned_count())
1087                },
1088                self.items.len(),
1089            )
1090        };
1091
1092        // Does the item already exist?
1093        let project_entry_id = if item.buffer_kind(cx) == ItemBufferKind::Singleton {
1094            item.project_entry_ids(cx).first().copied()
1095        } else {
1096            None
1097        };
1098
1099        let existing_item_index = self.items.iter().position(|existing_item| {
1100            if existing_item.item_id() == item.item_id() {
1101                true
1102            } else if existing_item.buffer_kind(cx) == ItemBufferKind::Singleton {
1103                existing_item
1104                    .project_entry_ids(cx)
1105                    .first()
1106                    .is_some_and(|existing_entry_id| {
1107                        Some(existing_entry_id) == project_entry_id.as_ref()
1108                    })
1109            } else {
1110                false
1111            }
1112        });
1113
1114        if let Some(existing_item_index) = existing_item_index {
1115            // If the item already exists, move it to the desired destination and activate it
1116
1117            if existing_item_index != insertion_index {
1118                let existing_item_is_active = existing_item_index == self.active_item_index;
1119
1120                // If the caller didn't specify a destination and the added item is already
1121                // the active one, don't move it
1122                if existing_item_is_active && destination_index.is_none() {
1123                    insertion_index = existing_item_index;
1124                } else {
1125                    self.items.remove(existing_item_index);
1126                    if existing_item_index < self.active_item_index {
1127                        self.active_item_index -= 1;
1128                    }
1129                    insertion_index = insertion_index.min(self.items.len());
1130
1131                    self.items.insert(insertion_index, item.clone());
1132
1133                    if existing_item_is_active {
1134                        self.active_item_index = insertion_index;
1135                    } else if insertion_index <= self.active_item_index {
1136                        self.active_item_index += 1;
1137                    }
1138                }
1139
1140                cx.notify();
1141            }
1142
1143            if activate {
1144                self.activate_item(insertion_index, activate_pane, focus_item, window, cx);
1145            }
1146        } else {
1147            self.items.insert(insertion_index, item.clone());
1148            cx.notify();
1149
1150            if activate {
1151                if insertion_index <= self.active_item_index
1152                    && self.preview_item_idx() != Some(self.active_item_index)
1153                {
1154                    self.active_item_index += 1;
1155                }
1156
1157                self.activate_item(insertion_index, activate_pane, focus_item, window, cx);
1158            }
1159        }
1160
1161        cx.emit(Event::AddItem { item });
1162    }
1163
1164    pub fn add_item(
1165        &mut self,
1166        item: Box<dyn ItemHandle>,
1167        activate_pane: bool,
1168        focus_item: bool,
1169        destination_index: Option<usize>,
1170        window: &mut Window,
1171        cx: &mut Context<Self>,
1172    ) {
1173        self.add_item_inner(
1174            item,
1175            activate_pane,
1176            focus_item,
1177            true,
1178            destination_index,
1179            window,
1180            cx,
1181        )
1182    }
1183
1184    pub fn items_len(&self) -> usize {
1185        self.items.len()
1186    }
1187
1188    pub fn items(&self) -> impl DoubleEndedIterator<Item = &Box<dyn ItemHandle>> {
1189        self.items.iter()
1190    }
1191
1192    pub fn items_of_type<T: Render>(&self) -> impl '_ + Iterator<Item = Entity<T>> {
1193        self.items
1194            .iter()
1195            .filter_map(|item| item.to_any().downcast().ok())
1196    }
1197
1198    pub fn active_item(&self) -> Option<Box<dyn ItemHandle>> {
1199        self.items.get(self.active_item_index).cloned()
1200    }
1201
1202    fn active_item_id(&self) -> EntityId {
1203        self.items[self.active_item_index].item_id()
1204    }
1205
1206    pub fn pixel_position_of_cursor(&self, cx: &App) -> Option<Point<Pixels>> {
1207        self.items
1208            .get(self.active_item_index)?
1209            .pixel_position_of_cursor(cx)
1210    }
1211
1212    pub fn item_for_entry(
1213        &self,
1214        entry_id: ProjectEntryId,
1215        cx: &App,
1216    ) -> Option<Box<dyn ItemHandle>> {
1217        self.items.iter().find_map(|item| {
1218            if item.buffer_kind(cx) == ItemBufferKind::Singleton
1219                && (item.project_entry_ids(cx).as_slice() == [entry_id])
1220            {
1221                Some(item.boxed_clone())
1222            } else {
1223                None
1224            }
1225        })
1226    }
1227
1228    pub fn item_for_path(
1229        &self,
1230        project_path: ProjectPath,
1231        cx: &App,
1232    ) -> Option<Box<dyn ItemHandle>> {
1233        self.items.iter().find_map(move |item| {
1234            if item.buffer_kind(cx) == ItemBufferKind::Singleton
1235                && (item.project_path(cx).as_slice() == [project_path.clone()])
1236            {
1237                Some(item.boxed_clone())
1238            } else {
1239                None
1240            }
1241        })
1242    }
1243
1244    pub fn index_for_item(&self, item: &dyn ItemHandle) -> Option<usize> {
1245        self.index_for_item_id(item.item_id())
1246    }
1247
1248    fn index_for_item_id(&self, item_id: EntityId) -> Option<usize> {
1249        self.items.iter().position(|i| i.item_id() == item_id)
1250    }
1251
1252    pub fn item_for_index(&self, ix: usize) -> Option<&dyn ItemHandle> {
1253        self.items.get(ix).map(|i| i.as_ref())
1254    }
1255
1256    pub fn toggle_zoom(&mut self, _: &ToggleZoom, window: &mut Window, cx: &mut Context<Self>) {
1257        if !self.can_toggle_zoom {
1258            cx.propagate();
1259        } else if self.zoomed {
1260            cx.emit(Event::ZoomOut);
1261        } else if !self.items.is_empty() {
1262            if !self.focus_handle.contains_focused(window, cx) {
1263                cx.focus_self(window);
1264            }
1265            cx.emit(Event::ZoomIn);
1266        }
1267    }
1268
1269    pub fn activate_item(
1270        &mut self,
1271        index: usize,
1272        activate_pane: bool,
1273        focus_item: bool,
1274        window: &mut Window,
1275        cx: &mut Context<Self>,
1276    ) {
1277        use NavigationMode::{GoingBack, GoingForward};
1278        if index < self.items.len() {
1279            let prev_active_item_ix = mem::replace(&mut self.active_item_index, index);
1280            if (prev_active_item_ix != self.active_item_index
1281                || matches!(self.nav_history.mode(), GoingBack | GoingForward))
1282                && let Some(prev_item) = self.items.get(prev_active_item_ix)
1283            {
1284                prev_item.deactivated(window, cx);
1285            }
1286            self.update_history(index);
1287            self.update_toolbar(window, cx);
1288            self.update_status_bar(window, cx);
1289
1290            if focus_item {
1291                self.focus_active_item(window, cx);
1292            }
1293
1294            cx.emit(Event::ActivateItem {
1295                local: activate_pane,
1296                focus_changed: focus_item,
1297            });
1298
1299            self.update_active_tab(index);
1300            cx.notify();
1301        }
1302    }
1303
1304    fn update_active_tab(&mut self, index: usize) {
1305        if !self.is_tab_pinned(index) {
1306            self.suppress_scroll = false;
1307            self.tab_bar_scroll_handle.scroll_to_item(index);
1308        }
1309    }
1310
1311    fn update_history(&mut self, index: usize) {
1312        if let Some(newly_active_item) = self.items.get(index) {
1313            self.activation_history
1314                .retain(|entry| entry.entity_id != newly_active_item.item_id());
1315            self.activation_history.push(ActivationHistoryEntry {
1316                entity_id: newly_active_item.item_id(),
1317                timestamp: self
1318                    .next_activation_timestamp
1319                    .fetch_add(1, Ordering::SeqCst),
1320            });
1321        }
1322    }
1323
1324    pub fn activate_previous_item(
1325        &mut self,
1326        _: &ActivatePreviousItem,
1327        window: &mut Window,
1328        cx: &mut Context<Self>,
1329    ) {
1330        let mut index = self.active_item_index;
1331        if index > 0 {
1332            index -= 1;
1333        } else if !self.items.is_empty() {
1334            index = self.items.len() - 1;
1335        }
1336        self.activate_item(index, true, true, window, cx);
1337    }
1338
1339    pub fn activate_next_item(
1340        &mut self,
1341        _: &ActivateNextItem,
1342        window: &mut Window,
1343        cx: &mut Context<Self>,
1344    ) {
1345        let mut index = self.active_item_index;
1346        if index + 1 < self.items.len() {
1347            index += 1;
1348        } else {
1349            index = 0;
1350        }
1351        self.activate_item(index, true, true, window, cx);
1352    }
1353
1354    pub fn swap_item_left(
1355        &mut self,
1356        _: &SwapItemLeft,
1357        window: &mut Window,
1358        cx: &mut Context<Self>,
1359    ) {
1360        let index = self.active_item_index;
1361        if index == 0 {
1362            return;
1363        }
1364
1365        self.items.swap(index, index - 1);
1366        self.activate_item(index - 1, true, true, window, cx);
1367    }
1368
1369    pub fn swap_item_right(
1370        &mut self,
1371        _: &SwapItemRight,
1372        window: &mut Window,
1373        cx: &mut Context<Self>,
1374    ) {
1375        let index = self.active_item_index;
1376        if index + 1 >= self.items.len() {
1377            return;
1378        }
1379
1380        self.items.swap(index, index + 1);
1381        self.activate_item(index + 1, true, true, window, cx);
1382    }
1383
1384    pub fn activate_last_item(
1385        &mut self,
1386        _: &ActivateLastItem,
1387        window: &mut Window,
1388        cx: &mut Context<Self>,
1389    ) {
1390        let index = self.items.len().saturating_sub(1);
1391        self.activate_item(index, true, true, window, cx);
1392    }
1393
1394    pub fn close_active_item(
1395        &mut self,
1396        action: &CloseActiveItem,
1397        window: &mut Window,
1398        cx: &mut Context<Self>,
1399    ) -> Task<Result<()>> {
1400        if self.items.is_empty() {
1401            // Close the window when there's no active items to close, if configured
1402            if WorkspaceSettings::get_global(cx)
1403                .when_closing_with_no_tabs
1404                .should_close()
1405            {
1406                window.dispatch_action(Box::new(CloseWindow), cx);
1407            }
1408
1409            return Task::ready(Ok(()));
1410        }
1411        if self.is_tab_pinned(self.active_item_index) && !action.close_pinned {
1412            // Activate any non-pinned tab in same pane
1413            let non_pinned_tab_index = self
1414                .items()
1415                .enumerate()
1416                .find(|(index, _item)| !self.is_tab_pinned(*index))
1417                .map(|(index, _item)| index);
1418            if let Some(index) = non_pinned_tab_index {
1419                self.activate_item(index, false, false, window, cx);
1420                return Task::ready(Ok(()));
1421            }
1422
1423            // Activate any non-pinned tab in different pane
1424            let current_pane = cx.entity();
1425            self.workspace
1426                .update(cx, |workspace, cx| {
1427                    let panes = workspace.center.panes();
1428                    let pane_with_unpinned_tab = panes.iter().find(|pane| {
1429                        if **pane == &current_pane {
1430                            return false;
1431                        }
1432                        pane.read(cx).has_unpinned_tabs()
1433                    });
1434                    if let Some(pane) = pane_with_unpinned_tab {
1435                        pane.update(cx, |pane, cx| pane.activate_unpinned_tab(window, cx));
1436                    }
1437                })
1438                .ok();
1439
1440            return Task::ready(Ok(()));
1441        };
1442
1443        let active_item_id = self.active_item_id();
1444
1445        self.close_item_by_id(
1446            active_item_id,
1447            action.save_intent.unwrap_or(SaveIntent::Close),
1448            window,
1449            cx,
1450        )
1451    }
1452
1453    pub fn close_item_by_id(
1454        &mut self,
1455        item_id_to_close: EntityId,
1456        save_intent: SaveIntent,
1457        window: &mut Window,
1458        cx: &mut Context<Self>,
1459    ) -> Task<Result<()>> {
1460        self.close_items(window, cx, save_intent, move |view_id| {
1461            view_id == item_id_to_close
1462        })
1463    }
1464
1465    pub fn close_other_items(
1466        &mut self,
1467        action: &CloseOtherItems,
1468        target_item_id: Option<EntityId>,
1469        window: &mut Window,
1470        cx: &mut Context<Self>,
1471    ) -> Task<Result<()>> {
1472        if self.items.is_empty() {
1473            return Task::ready(Ok(()));
1474        }
1475
1476        let active_item_id = match target_item_id {
1477            Some(result) => result,
1478            None => self.active_item_id(),
1479        };
1480
1481        let pinned_item_ids = self.pinned_item_ids();
1482
1483        self.close_items(
1484            window,
1485            cx,
1486            action.save_intent.unwrap_or(SaveIntent::Close),
1487            move |item_id| {
1488                item_id != active_item_id
1489                    && (action.close_pinned || !pinned_item_ids.contains(&item_id))
1490            },
1491        )
1492    }
1493
1494    pub fn close_multibuffer_items(
1495        &mut self,
1496        action: &CloseMultibufferItems,
1497        window: &mut Window,
1498        cx: &mut Context<Self>,
1499    ) -> Task<Result<()>> {
1500        if self.items.is_empty() {
1501            return Task::ready(Ok(()));
1502        }
1503
1504        let pinned_item_ids = self.pinned_item_ids();
1505        let multibuffer_items = self.multibuffer_item_ids(cx);
1506
1507        self.close_items(
1508            window,
1509            cx,
1510            action.save_intent.unwrap_or(SaveIntent::Close),
1511            move |item_id| {
1512                (action.close_pinned || !pinned_item_ids.contains(&item_id))
1513                    && multibuffer_items.contains(&item_id)
1514            },
1515        )
1516    }
1517
1518    pub fn close_clean_items(
1519        &mut self,
1520        action: &CloseCleanItems,
1521        window: &mut Window,
1522        cx: &mut Context<Self>,
1523    ) -> Task<Result<()>> {
1524        if self.items.is_empty() {
1525            return Task::ready(Ok(()));
1526        }
1527
1528        let clean_item_ids = self.clean_item_ids(cx);
1529        let pinned_item_ids = self.pinned_item_ids();
1530
1531        self.close_items(window, cx, SaveIntent::Close, move |item_id| {
1532            clean_item_ids.contains(&item_id)
1533                && (action.close_pinned || !pinned_item_ids.contains(&item_id))
1534        })
1535    }
1536
1537    pub fn close_items_to_the_left_by_id(
1538        &mut self,
1539        item_id: Option<EntityId>,
1540        action: &CloseItemsToTheLeft,
1541        window: &mut Window,
1542        cx: &mut Context<Self>,
1543    ) -> Task<Result<()>> {
1544        self.close_items_to_the_side_by_id(item_id, Side::Left, action.close_pinned, window, cx)
1545    }
1546
1547    pub fn close_items_to_the_right_by_id(
1548        &mut self,
1549        item_id: Option<EntityId>,
1550        action: &CloseItemsToTheRight,
1551        window: &mut Window,
1552        cx: &mut Context<Self>,
1553    ) -> Task<Result<()>> {
1554        self.close_items_to_the_side_by_id(item_id, Side::Right, action.close_pinned, window, cx)
1555    }
1556
1557    pub fn close_items_to_the_side_by_id(
1558        &mut self,
1559        item_id: Option<EntityId>,
1560        side: Side,
1561        close_pinned: bool,
1562        window: &mut Window,
1563        cx: &mut Context<Self>,
1564    ) -> Task<Result<()>> {
1565        if self.items.is_empty() {
1566            return Task::ready(Ok(()));
1567        }
1568
1569        let item_id = item_id.unwrap_or_else(|| self.active_item_id());
1570        let to_the_side_item_ids = self.to_the_side_item_ids(item_id, side);
1571        let pinned_item_ids = self.pinned_item_ids();
1572
1573        self.close_items(window, cx, SaveIntent::Close, move |item_id| {
1574            to_the_side_item_ids.contains(&item_id)
1575                && (close_pinned || !pinned_item_ids.contains(&item_id))
1576        })
1577    }
1578
1579    pub fn close_all_items(
1580        &mut self,
1581        action: &CloseAllItems,
1582        window: &mut Window,
1583        cx: &mut Context<Self>,
1584    ) -> Task<Result<()>> {
1585        if self.items.is_empty() {
1586            return Task::ready(Ok(()));
1587        }
1588
1589        let pinned_item_ids = self.pinned_item_ids();
1590
1591        self.close_items(
1592            window,
1593            cx,
1594            action.save_intent.unwrap_or(SaveIntent::Close),
1595            |item_id| action.close_pinned || !pinned_item_ids.contains(&item_id),
1596        )
1597    }
1598
1599    fn close_items_on_item_open(&mut self, window: &mut Window, cx: &mut Context<Self>) {
1600        let target = self.max_tabs.map(|m| m.get());
1601        let protect_active_item = false;
1602        self.close_items_to_target_count(target, protect_active_item, window, cx);
1603    }
1604
1605    fn close_items_on_settings_change(&mut self, window: &mut Window, cx: &mut Context<Self>) {
1606        let target = self.max_tabs.map(|m| m.get() + 1);
1607        // The active item in this case is the settings.json file, which should be protected from being closed
1608        let protect_active_item = true;
1609        self.close_items_to_target_count(target, protect_active_item, window, cx);
1610    }
1611
1612    fn close_items_to_target_count(
1613        &mut self,
1614        target_count: Option<usize>,
1615        protect_active_item: bool,
1616        window: &mut Window,
1617        cx: &mut Context<Self>,
1618    ) {
1619        let Some(target_count) = target_count else {
1620            return;
1621        };
1622
1623        let mut index_list = Vec::new();
1624        let mut items_len = self.items_len();
1625        let mut indexes: HashMap<EntityId, usize> = HashMap::default();
1626        let active_ix = self.active_item_index();
1627
1628        for (index, item) in self.items.iter().enumerate() {
1629            indexes.insert(item.item_id(), index);
1630        }
1631
1632        // Close least recently used items to reach target count.
1633        // The target count is allowed to be exceeded, as we protect pinned
1634        // items, dirty items, and sometimes, the active item.
1635        for entry in self.activation_history.iter() {
1636            if items_len < target_count {
1637                break;
1638            }
1639
1640            let Some(&index) = indexes.get(&entry.entity_id) else {
1641                continue;
1642            };
1643
1644            if protect_active_item && index == active_ix {
1645                continue;
1646            }
1647
1648            if let Some(true) = self.items.get(index).map(|item| item.is_dirty(cx)) {
1649                continue;
1650            }
1651
1652            if self.is_tab_pinned(index) {
1653                continue;
1654            }
1655
1656            index_list.push(index);
1657            items_len -= 1;
1658        }
1659        // The sort and reverse is necessary since we remove items
1660        // using their index position, hence removing from the end
1661        // of the list first to avoid changing indexes.
1662        index_list.sort_unstable();
1663        index_list
1664            .iter()
1665            .rev()
1666            .for_each(|&index| self._remove_item(index, false, false, None, window, cx));
1667    }
1668
1669    // Usually when you close an item that has unsaved changes, we prompt you to
1670    // save it. That said, if you still have the buffer open in a different pane
1671    // we can close this one without fear of losing data.
1672    pub fn skip_save_on_close(item: &dyn ItemHandle, workspace: &Workspace, cx: &App) -> bool {
1673        let mut dirty_project_item_ids = Vec::new();
1674        item.for_each_project_item(cx, &mut |project_item_id, project_item| {
1675            if project_item.is_dirty() {
1676                dirty_project_item_ids.push(project_item_id);
1677            }
1678        });
1679        if dirty_project_item_ids.is_empty() {
1680            return !(item.buffer_kind(cx) == ItemBufferKind::Singleton && item.is_dirty(cx));
1681        }
1682
1683        for open_item in workspace.items(cx) {
1684            if open_item.item_id() == item.item_id() {
1685                continue;
1686            }
1687            if open_item.buffer_kind(cx) != ItemBufferKind::Singleton {
1688                continue;
1689            }
1690            let other_project_item_ids = open_item.project_item_model_ids(cx);
1691            dirty_project_item_ids.retain(|id| !other_project_item_ids.contains(id));
1692        }
1693        dirty_project_item_ids.is_empty()
1694    }
1695
1696    pub(super) fn file_names_for_prompt(
1697        items: &mut dyn Iterator<Item = &Box<dyn ItemHandle>>,
1698        cx: &App,
1699    ) -> String {
1700        let mut file_names = BTreeSet::default();
1701        for item in items {
1702            item.for_each_project_item(cx, &mut |_, project_item| {
1703                if !project_item.is_dirty() {
1704                    return;
1705                }
1706                let filename = project_item
1707                    .project_path(cx)
1708                    .and_then(|path| path.path.file_name().map(ToOwned::to_owned));
1709                file_names.insert(filename.unwrap_or("untitled".to_string()));
1710            });
1711        }
1712        if file_names.len() > 6 {
1713            format!(
1714                "{}\n.. and {} more",
1715                file_names.iter().take(5).join("\n"),
1716                file_names.len() - 5
1717            )
1718        } else {
1719            file_names.into_iter().join("\n")
1720        }
1721    }
1722
1723    pub fn close_items(
1724        &self,
1725        window: &mut Window,
1726        cx: &mut Context<Pane>,
1727        mut save_intent: SaveIntent,
1728        should_close: impl Fn(EntityId) -> bool,
1729    ) -> Task<Result<()>> {
1730        // Find the items to close.
1731        let mut items_to_close = Vec::new();
1732        for item in &self.items {
1733            if should_close(item.item_id()) {
1734                items_to_close.push(item.boxed_clone());
1735            }
1736        }
1737
1738        let active_item_id = self.active_item().map(|item| item.item_id());
1739
1740        items_to_close.sort_by_key(|item| {
1741            let path = item.project_path(cx);
1742            // Put the currently active item at the end, because if the currently active item is not closed last
1743            // closing the currently active item will cause the focus to switch to another item
1744            // This will cause Zed to expand the content of the currently active item
1745            //
1746            // Beyond that sort in order of project path, with untitled files and multibuffers coming last.
1747            (active_item_id == Some(item.item_id()), path.is_none(), path)
1748        });
1749
1750        let workspace = self.workspace.clone();
1751        let Some(project) = self.project.upgrade() else {
1752            return Task::ready(Ok(()));
1753        };
1754        cx.spawn_in(window, async move |pane, cx| {
1755            let dirty_items = workspace.update(cx, |workspace, cx| {
1756                items_to_close
1757                    .iter()
1758                    .filter(|item| {
1759                        item.is_dirty(cx) && !Self::skip_save_on_close(item.as_ref(), workspace, cx)
1760                    })
1761                    .map(|item| item.boxed_clone())
1762                    .collect::<Vec<_>>()
1763            })?;
1764
1765            if save_intent == SaveIntent::Close && dirty_items.len() > 1 {
1766                let answer = pane.update_in(cx, |_, window, cx| {
1767                    let detail = Self::file_names_for_prompt(&mut dirty_items.iter(), cx);
1768                    window.prompt(
1769                        PromptLevel::Warning,
1770                        "Do you want to save changes to the following files?",
1771                        Some(&detail),
1772                        &["Save all", "Discard all", "Cancel"],
1773                        cx,
1774                    )
1775                })?;
1776                match answer.await {
1777                    Ok(0) => save_intent = SaveIntent::SaveAll,
1778                    Ok(1) => save_intent = SaveIntent::Skip,
1779                    Ok(2) => return Ok(()),
1780                    _ => {}
1781                }
1782            }
1783
1784            for item_to_close in items_to_close {
1785                let mut should_save = true;
1786                if save_intent == SaveIntent::Close {
1787                    workspace.update(cx, |workspace, cx| {
1788                        if Self::skip_save_on_close(item_to_close.as_ref(), workspace, cx) {
1789                            should_save = false;
1790                        }
1791                    })?;
1792                }
1793
1794                if should_save {
1795                    match Self::save_item(project.clone(), &pane, &*item_to_close, save_intent, cx)
1796                        .await
1797                    {
1798                        Ok(success) => {
1799                            if !success {
1800                                break;
1801                            }
1802                        }
1803                        Err(err) => {
1804                            let answer = pane.update_in(cx, |_, window, cx| {
1805                                let detail = Self::file_names_for_prompt(
1806                                    &mut [&item_to_close].into_iter(),
1807                                    cx,
1808                                );
1809                                window.prompt(
1810                                    PromptLevel::Warning,
1811                                    &format!("Unable to save file: {}", &err),
1812                                    Some(&detail),
1813                                    &["Close Without Saving", "Cancel"],
1814                                    cx,
1815                                )
1816                            })?;
1817                            match answer.await {
1818                                Ok(0) => {}
1819                                Ok(1..) | Err(_) => break,
1820                            }
1821                        }
1822                    }
1823                }
1824
1825                // Remove the item from the pane.
1826                pane.update_in(cx, |pane, window, cx| {
1827                    pane.remove_item(
1828                        item_to_close.item_id(),
1829                        false,
1830                        pane.close_pane_if_empty,
1831                        window,
1832                        cx,
1833                    );
1834                })
1835                .ok();
1836            }
1837
1838            pane.update(cx, |_, cx| cx.notify()).ok();
1839            Ok(())
1840        })
1841    }
1842
1843    pub fn take_active_item(
1844        &mut self,
1845        window: &mut Window,
1846        cx: &mut Context<Self>,
1847    ) -> Option<Box<dyn ItemHandle>> {
1848        let item = self.active_item()?;
1849        self.remove_item(item.item_id(), false, false, window, cx);
1850        Some(item)
1851    }
1852
1853    pub fn remove_item(
1854        &mut self,
1855        item_id: EntityId,
1856        activate_pane: bool,
1857        close_pane_if_empty: bool,
1858        window: &mut Window,
1859        cx: &mut Context<Self>,
1860    ) {
1861        let Some(item_index) = self.index_for_item_id(item_id) else {
1862            return;
1863        };
1864        self._remove_item(
1865            item_index,
1866            activate_pane,
1867            close_pane_if_empty,
1868            None,
1869            window,
1870            cx,
1871        )
1872    }
1873
1874    pub fn remove_item_and_focus_on_pane(
1875        &mut self,
1876        item_index: usize,
1877        activate_pane: bool,
1878        focus_on_pane_if_closed: Entity<Pane>,
1879        window: &mut Window,
1880        cx: &mut Context<Self>,
1881    ) {
1882        self._remove_item(
1883            item_index,
1884            activate_pane,
1885            true,
1886            Some(focus_on_pane_if_closed),
1887            window,
1888            cx,
1889        )
1890    }
1891
1892    fn _remove_item(
1893        &mut self,
1894        item_index: usize,
1895        activate_pane: bool,
1896        close_pane_if_empty: bool,
1897        focus_on_pane_if_closed: Option<Entity<Pane>>,
1898        window: &mut Window,
1899        cx: &mut Context<Self>,
1900    ) {
1901        let activate_on_close = &ItemSettings::get_global(cx).activate_on_close;
1902        self.activation_history
1903            .retain(|entry| entry.entity_id != self.items[item_index].item_id());
1904
1905        if self.is_tab_pinned(item_index) {
1906            self.pinned_tab_count -= 1;
1907        }
1908        if item_index == self.active_item_index {
1909            let left_neighbour_index = || item_index.min(self.items.len()).saturating_sub(1);
1910            let index_to_activate = match activate_on_close {
1911                ActivateOnClose::History => self
1912                    .activation_history
1913                    .pop()
1914                    .and_then(|last_activated_item| {
1915                        self.items.iter().enumerate().find_map(|(index, item)| {
1916                            (item.item_id() == last_activated_item.entity_id).then_some(index)
1917                        })
1918                    })
1919                    // We didn't have a valid activation history entry, so fallback
1920                    // to activating the item to the left
1921                    .unwrap_or_else(left_neighbour_index),
1922                ActivateOnClose::Neighbour => {
1923                    self.activation_history.pop();
1924                    if item_index + 1 < self.items.len() {
1925                        item_index + 1
1926                    } else {
1927                        item_index.saturating_sub(1)
1928                    }
1929                }
1930                ActivateOnClose::LeftNeighbour => {
1931                    self.activation_history.pop();
1932                    left_neighbour_index()
1933                }
1934            };
1935
1936            let should_activate = activate_pane || self.has_focus(window, cx);
1937            if self.items.len() == 1 && should_activate {
1938                self.focus_handle.focus(window);
1939            } else {
1940                self.activate_item(
1941                    index_to_activate,
1942                    should_activate,
1943                    should_activate,
1944                    window,
1945                    cx,
1946                );
1947            }
1948        }
1949
1950        let item = self.items.remove(item_index);
1951
1952        cx.emit(Event::RemovedItem { item: item.clone() });
1953        if self.items.is_empty() {
1954            item.deactivated(window, cx);
1955            if close_pane_if_empty {
1956                self.update_toolbar(window, cx);
1957                cx.emit(Event::Remove {
1958                    focus_on_pane: focus_on_pane_if_closed,
1959                });
1960            }
1961        }
1962
1963        if item_index < self.active_item_index {
1964            self.active_item_index -= 1;
1965        }
1966
1967        let mode = self.nav_history.mode();
1968        self.nav_history.set_mode(NavigationMode::ClosingItem);
1969        item.deactivated(window, cx);
1970        item.on_removed(cx);
1971        self.nav_history.set_mode(mode);
1972
1973        if self.is_active_preview_item(item.item_id()) {
1974            self.set_preview_item_id(None, cx);
1975        }
1976
1977        if let Some(path) = item.project_path(cx) {
1978            let abs_path = self
1979                .nav_history
1980                .0
1981                .lock()
1982                .paths_by_item
1983                .get(&item.item_id())
1984                .and_then(|(_, abs_path)| abs_path.clone());
1985
1986            self.nav_history
1987                .0
1988                .lock()
1989                .paths_by_item
1990                .insert(item.item_id(), (path, abs_path));
1991        } else {
1992            self.nav_history
1993                .0
1994                .lock()
1995                .paths_by_item
1996                .remove(&item.item_id());
1997        }
1998
1999        if self.zoom_out_on_close && self.items.is_empty() && close_pane_if_empty && self.zoomed {
2000            cx.emit(Event::ZoomOut);
2001        }
2002
2003        cx.notify();
2004    }
2005
2006    pub async fn save_item(
2007        project: Entity<Project>,
2008        pane: &WeakEntity<Pane>,
2009        item: &dyn ItemHandle,
2010        save_intent: SaveIntent,
2011        cx: &mut AsyncWindowContext,
2012    ) -> Result<bool> {
2013        const CONFLICT_MESSAGE: &str = "This file has changed on disk since you started editing it. Do you want to overwrite it?";
2014
2015        const DELETED_MESSAGE: &str = "This file has been deleted on disk since you started editing it. Do you want to recreate it?";
2016
2017        let path_style = project.read_with(cx, |project, cx| project.path_style(cx))?;
2018        if save_intent == SaveIntent::Skip {
2019            return Ok(true);
2020        };
2021        let Some(item_ix) = pane
2022            .read_with(cx, |pane, _| pane.index_for_item(item))
2023            .ok()
2024            .flatten()
2025        else {
2026            return Ok(true);
2027        };
2028
2029        let (
2030            mut has_conflict,
2031            mut is_dirty,
2032            mut can_save,
2033            can_save_as,
2034            is_singleton,
2035            has_deleted_file,
2036        ) = cx.update(|_window, cx| {
2037            (
2038                item.has_conflict(cx),
2039                item.is_dirty(cx),
2040                item.can_save(cx),
2041                item.can_save_as(cx),
2042                item.buffer_kind(cx) == ItemBufferKind::Singleton,
2043                item.has_deleted_file(cx),
2044            )
2045        })?;
2046
2047        // when saving a single buffer, we ignore whether or not it's dirty.
2048        if save_intent == SaveIntent::Save || save_intent == SaveIntent::SaveWithoutFormat {
2049            is_dirty = true;
2050        }
2051
2052        if save_intent == SaveIntent::SaveAs {
2053            is_dirty = true;
2054            has_conflict = false;
2055            can_save = false;
2056        }
2057
2058        if save_intent == SaveIntent::Overwrite {
2059            has_conflict = false;
2060        }
2061
2062        let should_format = save_intent != SaveIntent::SaveWithoutFormat;
2063
2064        if has_conflict && can_save {
2065            if has_deleted_file && is_singleton {
2066                let answer = pane.update_in(cx, |pane, window, cx| {
2067                    pane.activate_item(item_ix, true, true, window, cx);
2068                    window.prompt(
2069                        PromptLevel::Warning,
2070                        DELETED_MESSAGE,
2071                        None,
2072                        &["Save", "Close", "Cancel"],
2073                        cx,
2074                    )
2075                })?;
2076                match answer.await {
2077                    Ok(0) => {
2078                        pane.update_in(cx, |_, window, cx| {
2079                            item.save(
2080                                SaveOptions {
2081                                    format: should_format,
2082                                    autosave: false,
2083                                },
2084                                project,
2085                                window,
2086                                cx,
2087                            )
2088                        })?
2089                        .await?
2090                    }
2091                    Ok(1) => {
2092                        pane.update_in(cx, |pane, window, cx| {
2093                            pane.remove_item(item.item_id(), false, true, window, cx)
2094                        })?;
2095                    }
2096                    _ => return Ok(false),
2097                }
2098                return Ok(true);
2099            } else {
2100                let answer = pane.update_in(cx, |pane, window, cx| {
2101                    pane.activate_item(item_ix, true, true, window, cx);
2102                    window.prompt(
2103                        PromptLevel::Warning,
2104                        CONFLICT_MESSAGE,
2105                        None,
2106                        &["Overwrite", "Discard", "Cancel"],
2107                        cx,
2108                    )
2109                })?;
2110                match answer.await {
2111                    Ok(0) => {
2112                        pane.update_in(cx, |_, window, cx| {
2113                            item.save(
2114                                SaveOptions {
2115                                    format: should_format,
2116                                    autosave: false,
2117                                },
2118                                project,
2119                                window,
2120                                cx,
2121                            )
2122                        })?
2123                        .await?
2124                    }
2125                    Ok(1) => {
2126                        pane.update_in(cx, |_, window, cx| item.reload(project, window, cx))?
2127                            .await?
2128                    }
2129                    _ => return Ok(false),
2130                }
2131            }
2132        } else if is_dirty && (can_save || can_save_as) {
2133            if save_intent == SaveIntent::Close {
2134                let will_autosave = cx.update(|_window, cx| {
2135                    item.can_autosave(cx)
2136                        && item.workspace_settings(cx).autosave.should_save_on_close()
2137                })?;
2138                if !will_autosave {
2139                    let item_id = item.item_id();
2140                    let answer_task = pane.update_in(cx, |pane, window, cx| {
2141                        if pane.save_modals_spawned.insert(item_id) {
2142                            pane.activate_item(item_ix, true, true, window, cx);
2143                            let prompt = dirty_message_for(item.project_path(cx), path_style);
2144                            Some(window.prompt(
2145                                PromptLevel::Warning,
2146                                &prompt,
2147                                None,
2148                                &["Save", "Don't Save", "Cancel"],
2149                                cx,
2150                            ))
2151                        } else {
2152                            None
2153                        }
2154                    })?;
2155                    if let Some(answer_task) = answer_task {
2156                        let answer = answer_task.await;
2157                        pane.update(cx, |pane, _| {
2158                            if !pane.save_modals_spawned.remove(&item_id) {
2159                                debug_panic!(
2160                                    "save modal was not present in spawned modals after awaiting for its answer"
2161                                )
2162                            }
2163                        })?;
2164                        match answer {
2165                            Ok(0) => {}
2166                            Ok(1) => {
2167                                // Don't save this file
2168                                pane.update_in(cx, |pane, _, cx| {
2169                                    if pane.is_tab_pinned(item_ix) && !item.can_save(cx) {
2170                                        pane.pinned_tab_count -= 1;
2171                                    }
2172                                })
2173                                .log_err();
2174                                return Ok(true);
2175                            }
2176                            _ => return Ok(false), // Cancel
2177                        }
2178                    } else {
2179                        return Ok(false);
2180                    }
2181                }
2182            }
2183
2184            if can_save {
2185                pane.update_in(cx, |pane, window, cx| {
2186                    if pane.is_active_preview_item(item.item_id()) {
2187                        pane.set_preview_item_id(None, cx);
2188                    }
2189                    item.save(
2190                        SaveOptions {
2191                            format: should_format,
2192                            autosave: false,
2193                        },
2194                        project,
2195                        window,
2196                        cx,
2197                    )
2198                })?
2199                .await?;
2200            } else if can_save_as && is_singleton {
2201                let suggested_name =
2202                    cx.update(|_window, cx| item.suggested_filename(cx).to_string())?;
2203                let new_path = pane.update_in(cx, |pane, window, cx| {
2204                    pane.activate_item(item_ix, true, true, window, cx);
2205                    pane.workspace.update(cx, |workspace, cx| {
2206                        let lister = if workspace.project().read(cx).is_local() {
2207                            DirectoryLister::Local(
2208                                workspace.project().clone(),
2209                                workspace.app_state().fs.clone(),
2210                            )
2211                        } else {
2212                            DirectoryLister::Project(workspace.project().clone())
2213                        };
2214                        workspace.prompt_for_new_path(lister, Some(suggested_name), window, cx)
2215                    })
2216                })??;
2217                let Some(new_path) = new_path.await.ok().flatten().into_iter().flatten().next()
2218                else {
2219                    return Ok(false);
2220                };
2221
2222                let project_path = pane
2223                    .update(cx, |pane, cx| {
2224                        pane.project
2225                            .update(cx, |project, cx| {
2226                                project.find_or_create_worktree(new_path, true, cx)
2227                            })
2228                            .ok()
2229                    })
2230                    .ok()
2231                    .flatten();
2232                let save_task = if let Some(project_path) = project_path {
2233                    let (worktree, path) = project_path.await?;
2234                    let worktree_id = worktree.read_with(cx, |worktree, _| worktree.id())?;
2235                    let new_path = ProjectPath {
2236                        worktree_id,
2237                        path: path,
2238                    };
2239
2240                    pane.update_in(cx, |pane, window, cx| {
2241                        if let Some(item) = pane.item_for_path(new_path.clone(), cx) {
2242                            pane.remove_item(item.item_id(), false, false, window, cx);
2243                        }
2244
2245                        item.save_as(project, new_path, window, cx)
2246                    })?
2247                } else {
2248                    return Ok(false);
2249                };
2250
2251                save_task.await?;
2252                return Ok(true);
2253            }
2254        }
2255
2256        pane.update(cx, |_, cx| {
2257            cx.emit(Event::UserSavedItem {
2258                item: item.downgrade_item(),
2259                save_intent,
2260            });
2261            true
2262        })
2263    }
2264
2265    pub fn autosave_item(
2266        item: &dyn ItemHandle,
2267        project: Entity<Project>,
2268        window: &mut Window,
2269        cx: &mut App,
2270    ) -> Task<Result<()>> {
2271        let format = !matches!(
2272            item.workspace_settings(cx).autosave,
2273            AutosaveSetting::AfterDelay { .. }
2274        );
2275        if item.can_autosave(cx) {
2276            item.save(
2277                SaveOptions {
2278                    format,
2279                    autosave: true,
2280                },
2281                project,
2282                window,
2283                cx,
2284            )
2285        } else {
2286            Task::ready(Ok(()))
2287        }
2288    }
2289
2290    pub fn focus_active_item(&mut self, window: &mut Window, cx: &mut Context<Self>) {
2291        if let Some(active_item) = self.active_item() {
2292            let focus_handle = active_item.item_focus_handle(cx);
2293            window.focus(&focus_handle);
2294        }
2295    }
2296
2297    pub fn split(&mut self, direction: SplitDirection, cx: &mut Context<Self>) {
2298        cx.emit(Event::Split {
2299            direction,
2300            clone_active_item: true,
2301        });
2302    }
2303
2304    pub fn split_and_move(&mut self, direction: SplitDirection, cx: &mut Context<Self>) {
2305        if self.items.len() > 1 {
2306            cx.emit(Event::Split {
2307                direction,
2308                clone_active_item: false,
2309            });
2310        }
2311    }
2312
2313    pub fn toolbar(&self) -> &Entity<Toolbar> {
2314        &self.toolbar
2315    }
2316
2317    pub fn handle_deleted_project_item(
2318        &mut self,
2319        entry_id: ProjectEntryId,
2320        window: &mut Window,
2321        cx: &mut Context<Pane>,
2322    ) -> Option<()> {
2323        let item_id = self.items().find_map(|item| {
2324            if item.buffer_kind(cx) == ItemBufferKind::Singleton
2325                && item.project_entry_ids(cx).as_slice() == [entry_id]
2326            {
2327                Some(item.item_id())
2328            } else {
2329                None
2330            }
2331        })?;
2332
2333        self.remove_item(item_id, false, true, window, cx);
2334        self.nav_history.remove_item(item_id);
2335
2336        Some(())
2337    }
2338
2339    fn update_toolbar(&mut self, window: &mut Window, cx: &mut Context<Self>) {
2340        let active_item = self
2341            .items
2342            .get(self.active_item_index)
2343            .map(|item| item.as_ref());
2344        self.toolbar.update(cx, |toolbar, cx| {
2345            toolbar.set_active_item(active_item, window, cx);
2346        });
2347    }
2348
2349    fn update_status_bar(&mut self, window: &mut Window, cx: &mut Context<Self>) {
2350        let workspace = self.workspace.clone();
2351        let pane = cx.entity();
2352
2353        window.defer(cx, move |window, cx| {
2354            let Ok(status_bar) =
2355                workspace.read_with(cx, |workspace, _| workspace.status_bar.clone())
2356            else {
2357                return;
2358            };
2359
2360            status_bar.update(cx, move |status_bar, cx| {
2361                status_bar.set_active_pane(&pane, window, cx);
2362            });
2363        });
2364    }
2365
2366    fn entry_abs_path(&self, entry: ProjectEntryId, cx: &App) -> Option<PathBuf> {
2367        let worktree = self
2368            .workspace
2369            .upgrade()?
2370            .read(cx)
2371            .project()
2372            .read(cx)
2373            .worktree_for_entry(entry, cx)?
2374            .read(cx);
2375        let entry = worktree.entry_for_id(entry)?;
2376        Some(match &entry.canonical_path {
2377            Some(canonical_path) => canonical_path.to_path_buf(),
2378            None => worktree.absolutize(&entry.path),
2379        })
2380    }
2381
2382    pub fn icon_color(selected: bool) -> Color {
2383        if selected {
2384            Color::Default
2385        } else {
2386            Color::Muted
2387        }
2388    }
2389
2390    fn toggle_pin_tab(&mut self, _: &TogglePinTab, window: &mut Window, cx: &mut Context<Self>) {
2391        if self.items.is_empty() {
2392            return;
2393        }
2394        let active_tab_ix = self.active_item_index();
2395        if self.is_tab_pinned(active_tab_ix) {
2396            self.unpin_tab_at(active_tab_ix, window, cx);
2397        } else {
2398            self.pin_tab_at(active_tab_ix, window, cx);
2399        }
2400    }
2401
2402    fn unpin_all_tabs(&mut self, _: &UnpinAllTabs, window: &mut Window, cx: &mut Context<Self>) {
2403        if self.items.is_empty() {
2404            return;
2405        }
2406
2407        let pinned_item_ids = self.pinned_item_ids().into_iter().rev();
2408
2409        for pinned_item_id in pinned_item_ids {
2410            if let Some(ix) = self.index_for_item_id(pinned_item_id) {
2411                self.unpin_tab_at(ix, window, cx);
2412            }
2413        }
2414    }
2415
2416    fn pin_tab_at(&mut self, ix: usize, window: &mut Window, cx: &mut Context<Self>) {
2417        self.change_tab_pin_state(ix, PinOperation::Pin, window, cx);
2418    }
2419
2420    fn unpin_tab_at(&mut self, ix: usize, window: &mut Window, cx: &mut Context<Self>) {
2421        self.change_tab_pin_state(ix, PinOperation::Unpin, window, cx);
2422    }
2423
2424    fn change_tab_pin_state(
2425        &mut self,
2426        ix: usize,
2427        operation: PinOperation,
2428        window: &mut Window,
2429        cx: &mut Context<Self>,
2430    ) {
2431        maybe!({
2432            let pane = cx.entity();
2433
2434            let destination_index = match operation {
2435                PinOperation::Pin => self.pinned_tab_count.min(ix),
2436                PinOperation::Unpin => self.pinned_tab_count.checked_sub(1)?,
2437            };
2438
2439            let id = self.item_for_index(ix)?.item_id();
2440            let should_activate = ix == self.active_item_index;
2441
2442            if matches!(operation, PinOperation::Pin) && self.is_active_preview_item(id) {
2443                self.set_preview_item_id(None, cx);
2444            }
2445
2446            match operation {
2447                PinOperation::Pin => self.pinned_tab_count += 1,
2448                PinOperation::Unpin => self.pinned_tab_count -= 1,
2449            }
2450
2451            if ix == destination_index {
2452                cx.notify();
2453            } else {
2454                self.workspace
2455                    .update(cx, |_, cx| {
2456                        cx.defer_in(window, move |_, window, cx| {
2457                            move_item(
2458                                &pane,
2459                                &pane,
2460                                id,
2461                                destination_index,
2462                                should_activate,
2463                                window,
2464                                cx,
2465                            );
2466                        });
2467                    })
2468                    .ok()?;
2469            }
2470
2471            let event = match operation {
2472                PinOperation::Pin => Event::ItemPinned,
2473                PinOperation::Unpin => Event::ItemUnpinned,
2474            };
2475
2476            cx.emit(event);
2477
2478            Some(())
2479        });
2480    }
2481
2482    fn is_tab_pinned(&self, ix: usize) -> bool {
2483        self.pinned_tab_count > ix
2484    }
2485
2486    fn has_unpinned_tabs(&self) -> bool {
2487        self.pinned_tab_count < self.items.len()
2488    }
2489
2490    fn activate_unpinned_tab(&mut self, window: &mut Window, cx: &mut Context<Self>) {
2491        if self.items.is_empty() {
2492            return;
2493        }
2494        let Some(index) = self
2495            .items()
2496            .enumerate()
2497            .find_map(|(index, _item)| (!self.is_tab_pinned(index)).then_some(index))
2498        else {
2499            return;
2500        };
2501        self.activate_item(index, true, true, window, cx);
2502    }
2503
2504    fn render_tab(
2505        &self,
2506        ix: usize,
2507        item: &dyn ItemHandle,
2508        detail: usize,
2509        focus_handle: &FocusHandle,
2510        window: &mut Window,
2511        cx: &mut Context<Pane>,
2512    ) -> impl IntoElement + use<> {
2513        let is_active = ix == self.active_item_index;
2514        let is_preview = self
2515            .preview_item_id
2516            .map(|id| id == item.item_id())
2517            .unwrap_or(false);
2518
2519        let label = item.tab_content(
2520            TabContentParams {
2521                detail: Some(detail),
2522                selected: is_active,
2523                preview: is_preview,
2524                deemphasized: !self.has_focus(window, cx),
2525            },
2526            window,
2527            cx,
2528        );
2529
2530        let item_diagnostic = item
2531            .project_path(cx)
2532            .map_or(None, |project_path| self.diagnostics.get(&project_path));
2533
2534        let decorated_icon = item_diagnostic.map_or(None, |diagnostic| {
2535            let icon = match item.tab_icon(window, cx) {
2536                Some(icon) => icon,
2537                None => return None,
2538            };
2539
2540            let knockout_item_color = if is_active {
2541                cx.theme().colors().tab_active_background
2542            } else {
2543                cx.theme().colors().tab_bar_background
2544            };
2545
2546            let (icon_decoration, icon_color) = if matches!(diagnostic, &DiagnosticSeverity::ERROR)
2547            {
2548                (IconDecorationKind::X, Color::Error)
2549            } else {
2550                (IconDecorationKind::Triangle, Color::Warning)
2551            };
2552
2553            Some(DecoratedIcon::new(
2554                icon.size(IconSize::Small).color(Color::Muted),
2555                Some(
2556                    IconDecoration::new(icon_decoration, knockout_item_color, cx)
2557                        .color(icon_color.color(cx))
2558                        .position(Point {
2559                            x: px(-2.),
2560                            y: px(-2.),
2561                        }),
2562                ),
2563            ))
2564        });
2565
2566        let icon = if decorated_icon.is_none() {
2567            match item_diagnostic {
2568                Some(&DiagnosticSeverity::ERROR) => None,
2569                Some(&DiagnosticSeverity::WARNING) => None,
2570                _ => item
2571                    .tab_icon(window, cx)
2572                    .map(|icon| icon.color(Color::Muted)),
2573            }
2574            .map(|icon| icon.size(IconSize::Small))
2575        } else {
2576            None
2577        };
2578
2579        let settings = ItemSettings::get_global(cx);
2580        let close_side = &settings.close_position;
2581        let show_close_button = &settings.show_close_button;
2582        let indicator = render_item_indicator(item.boxed_clone(), cx);
2583        let item_id = item.item_id();
2584        let is_first_item = ix == 0;
2585        let is_last_item = ix == self.items.len() - 1;
2586        let is_pinned = self.is_tab_pinned(ix);
2587        let position_relative_to_active_item = ix.cmp(&self.active_item_index);
2588
2589        let tab = Tab::new(ix)
2590            .position(if is_first_item {
2591                TabPosition::First
2592            } else if is_last_item {
2593                TabPosition::Last
2594            } else {
2595                TabPosition::Middle(position_relative_to_active_item)
2596            })
2597            .close_side(match close_side {
2598                ClosePosition::Left => ui::TabCloseSide::Start,
2599                ClosePosition::Right => ui::TabCloseSide::End,
2600            })
2601            .toggle_state(is_active)
2602            .on_click(cx.listener(move |pane: &mut Self, _, window, cx| {
2603                pane.activate_item(ix, true, true, window, cx)
2604            }))
2605            // TODO: This should be a click listener with the middle mouse button instead of a mouse down listener.
2606            .on_mouse_down(
2607                MouseButton::Middle,
2608                cx.listener(move |pane, _event, window, cx| {
2609                    pane.close_item_by_id(item_id, SaveIntent::Close, window, cx)
2610                        .detach_and_log_err(cx);
2611                }),
2612            )
2613            .on_mouse_down(
2614                MouseButton::Left,
2615                cx.listener(move |pane, event: &MouseDownEvent, _, cx| {
2616                    if let Some(id) = pane.preview_item_id
2617                        && id == item_id
2618                        && event.click_count > 1
2619                    {
2620                        pane.set_preview_item_id(None, cx);
2621                    }
2622                }),
2623            )
2624            .on_drag(
2625                DraggedTab {
2626                    item: item.boxed_clone(),
2627                    pane: cx.entity(),
2628                    detail,
2629                    is_active,
2630                    ix,
2631                },
2632                |tab, _, _, cx| cx.new(|_| tab.clone()),
2633            )
2634            .drag_over::<DraggedTab>(move |tab, dragged_tab: &DraggedTab, _, cx| {
2635                let mut styled_tab = tab
2636                    .bg(cx.theme().colors().drop_target_background)
2637                    .border_color(cx.theme().colors().drop_target_border)
2638                    .border_0();
2639
2640                if ix < dragged_tab.ix {
2641                    styled_tab = styled_tab.border_l_2();
2642                } else if ix > dragged_tab.ix {
2643                    styled_tab = styled_tab.border_r_2();
2644                }
2645
2646                styled_tab
2647            })
2648            .drag_over::<DraggedSelection>(|tab, _, _, cx| {
2649                tab.bg(cx.theme().colors().drop_target_background)
2650            })
2651            .when_some(self.can_drop_predicate.clone(), |this, p| {
2652                this.can_drop(move |a, window, cx| p(a, window, cx))
2653            })
2654            .on_drop(
2655                cx.listener(move |this, dragged_tab: &DraggedTab, window, cx| {
2656                    this.drag_split_direction = None;
2657                    this.handle_tab_drop(dragged_tab, ix, window, cx)
2658                }),
2659            )
2660            .on_drop(
2661                cx.listener(move |this, selection: &DraggedSelection, window, cx| {
2662                    this.drag_split_direction = None;
2663                    this.handle_dragged_selection_drop(selection, Some(ix), window, cx)
2664                }),
2665            )
2666            .on_drop(cx.listener(move |this, paths, window, cx| {
2667                this.drag_split_direction = None;
2668                this.handle_external_paths_drop(paths, window, cx)
2669            }))
2670            .when_some(item.tab_tooltip_content(cx), |tab, content| match content {
2671                TabTooltipContent::Text(text) => tab.tooltip(Tooltip::text(text)),
2672                TabTooltipContent::Custom(element_fn) => {
2673                    tab.tooltip(move |window, cx| element_fn(window, cx))
2674                }
2675            })
2676            .start_slot::<Indicator>(indicator)
2677            .map(|this| {
2678                let end_slot_action: &'static dyn Action;
2679                let end_slot_tooltip_text: &'static str;
2680                let end_slot = if is_pinned {
2681                    end_slot_action = &TogglePinTab;
2682                    end_slot_tooltip_text = "Unpin Tab";
2683                    IconButton::new("unpin tab", IconName::Pin)
2684                        .shape(IconButtonShape::Square)
2685                        .icon_color(Color::Muted)
2686                        .size(ButtonSize::None)
2687                        .icon_size(IconSize::Small)
2688                        .on_click(cx.listener(move |pane, _, window, cx| {
2689                            pane.unpin_tab_at(ix, window, cx);
2690                        }))
2691                } else {
2692                    end_slot_action = &CloseActiveItem {
2693                        save_intent: None,
2694                        close_pinned: false,
2695                    };
2696                    end_slot_tooltip_text = "Close Tab";
2697                    match show_close_button {
2698                        ShowCloseButton::Always => IconButton::new("close tab", IconName::Close),
2699                        ShowCloseButton::Hover => {
2700                            IconButton::new("close tab", IconName::Close).visible_on_hover("")
2701                        }
2702                        ShowCloseButton::Hidden => return this,
2703                    }
2704                    .shape(IconButtonShape::Square)
2705                    .icon_color(Color::Muted)
2706                    .size(ButtonSize::None)
2707                    .icon_size(IconSize::Small)
2708                    .on_click(cx.listener(move |pane, _, window, cx| {
2709                        pane.close_item_by_id(item_id, SaveIntent::Close, window, cx)
2710                            .detach_and_log_err(cx);
2711                    }))
2712                }
2713                .map(|this| {
2714                    if is_active {
2715                        let focus_handle = focus_handle.clone();
2716                        this.tooltip(move |window, cx| {
2717                            Tooltip::for_action_in(
2718                                end_slot_tooltip_text,
2719                                end_slot_action,
2720                                &focus_handle,
2721                                window,
2722                                cx,
2723                            )
2724                        })
2725                    } else {
2726                        this.tooltip(Tooltip::text(end_slot_tooltip_text))
2727                    }
2728                });
2729                this.end_slot(end_slot)
2730            })
2731            .child(
2732                h_flex()
2733                    .gap_1()
2734                    .items_center()
2735                    .children(
2736                        std::iter::once(if let Some(decorated_icon) = decorated_icon {
2737                            Some(div().child(decorated_icon.into_any_element()))
2738                        } else {
2739                            icon.map(|icon| div().child(icon.into_any_element()))
2740                        })
2741                        .flatten(),
2742                    )
2743                    .child(label),
2744            );
2745
2746        let single_entry_to_resolve = (self.items[ix].buffer_kind(cx) == ItemBufferKind::Singleton)
2747            .then(|| self.items[ix].project_entry_ids(cx).get(0).copied())
2748            .flatten();
2749
2750        let total_items = self.items.len();
2751        let has_multibuffer_items = self
2752            .items
2753            .iter()
2754            .any(|item| item.buffer_kind(cx) == ItemBufferKind::Multibuffer);
2755        let has_items_to_left = ix > 0;
2756        let has_items_to_right = ix < total_items - 1;
2757        let has_clean_items = self.items.iter().any(|item| !item.is_dirty(cx));
2758        let is_pinned = self.is_tab_pinned(ix);
2759        let pane = cx.entity().downgrade();
2760        let menu_context = item.item_focus_handle(cx);
2761        right_click_menu(ix)
2762            .trigger(|_, _, _| tab)
2763            .menu(move |window, cx| {
2764                let pane = pane.clone();
2765                let menu_context = menu_context.clone();
2766                ContextMenu::build(window, cx, move |mut menu, window, cx| {
2767                    let close_active_item_action = CloseActiveItem {
2768                        save_intent: None,
2769                        close_pinned: true,
2770                    };
2771                    let close_inactive_items_action = CloseOtherItems {
2772                        save_intent: None,
2773                        close_pinned: false,
2774                    };
2775                    let close_multibuffers_action = CloseMultibufferItems {
2776                        save_intent: None,
2777                        close_pinned: false,
2778                    };
2779                    let close_items_to_the_left_action = CloseItemsToTheLeft {
2780                        close_pinned: false,
2781                    };
2782                    let close_items_to_the_right_action = CloseItemsToTheRight {
2783                        close_pinned: false,
2784                    };
2785                    let close_clean_items_action = CloseCleanItems {
2786                        close_pinned: false,
2787                    };
2788                    let close_all_items_action = CloseAllItems {
2789                        save_intent: None,
2790                        close_pinned: false,
2791                    };
2792                    if let Some(pane) = pane.upgrade() {
2793                        menu = menu
2794                            .entry(
2795                                "Close",
2796                                Some(Box::new(close_active_item_action)),
2797                                window.handler_for(&pane, move |pane, window, cx| {
2798                                    pane.close_item_by_id(item_id, SaveIntent::Close, window, cx)
2799                                        .detach_and_log_err(cx);
2800                                }),
2801                            )
2802                            .item(ContextMenuItem::Entry(
2803                                ContextMenuEntry::new("Close Others")
2804                                    .action(Box::new(close_inactive_items_action.clone()))
2805                                    .disabled(total_items == 1)
2806                                    .handler(window.handler_for(&pane, move |pane, window, cx| {
2807                                        pane.close_other_items(
2808                                            &close_inactive_items_action,
2809                                            Some(item_id),
2810                                            window,
2811                                            cx,
2812                                        )
2813                                        .detach_and_log_err(cx);
2814                                    })),
2815                            ))
2816                            // We make this optional, instead of using disabled as to not overwhelm the context menu unnecessarily
2817                            .extend(has_multibuffer_items.then(|| {
2818                                ContextMenuItem::Entry(
2819                                    ContextMenuEntry::new("Close Multibuffers")
2820                                        .action(Box::new(close_multibuffers_action.clone()))
2821                                        .handler(window.handler_for(
2822                                            &pane,
2823                                            move |pane, window, cx| {
2824                                                pane.close_multibuffer_items(
2825                                                    &close_multibuffers_action,
2826                                                    window,
2827                                                    cx,
2828                                                )
2829                                                .detach_and_log_err(cx);
2830                                            },
2831                                        )),
2832                                )
2833                            }))
2834                            .separator()
2835                            .item(ContextMenuItem::Entry(
2836                                ContextMenuEntry::new("Close Left")
2837                                    .action(Box::new(close_items_to_the_left_action.clone()))
2838                                    .disabled(!has_items_to_left)
2839                                    .handler(window.handler_for(&pane, move |pane, window, cx| {
2840                                        pane.close_items_to_the_left_by_id(
2841                                            Some(item_id),
2842                                            &close_items_to_the_left_action,
2843                                            window,
2844                                            cx,
2845                                        )
2846                                        .detach_and_log_err(cx);
2847                                    })),
2848                            ))
2849                            .item(ContextMenuItem::Entry(
2850                                ContextMenuEntry::new("Close Right")
2851                                    .action(Box::new(close_items_to_the_right_action.clone()))
2852                                    .disabled(!has_items_to_right)
2853                                    .handler(window.handler_for(&pane, move |pane, window, cx| {
2854                                        pane.close_items_to_the_right_by_id(
2855                                            Some(item_id),
2856                                            &close_items_to_the_right_action,
2857                                            window,
2858                                            cx,
2859                                        )
2860                                        .detach_and_log_err(cx);
2861                                    })),
2862                            ))
2863                            .separator()
2864                            .item(ContextMenuItem::Entry(
2865                                ContextMenuEntry::new("Close Clean")
2866                                    .action(Box::new(close_clean_items_action.clone()))
2867                                    .disabled(!has_clean_items)
2868                                    .handler(window.handler_for(&pane, move |pane, window, cx| {
2869                                        pane.close_clean_items(
2870                                            &close_clean_items_action,
2871                                            window,
2872                                            cx,
2873                                        )
2874                                        .detach_and_log_err(cx)
2875                                    })),
2876                            ))
2877                            .entry(
2878                                "Close All",
2879                                Some(Box::new(close_all_items_action.clone())),
2880                                window.handler_for(&pane, move |pane, window, cx| {
2881                                    pane.close_all_items(&close_all_items_action, window, cx)
2882                                        .detach_and_log_err(cx)
2883                                }),
2884                            );
2885
2886                        let pin_tab_entries = |menu: ContextMenu| {
2887                            menu.separator().map(|this| {
2888                                if is_pinned {
2889                                    this.entry(
2890                                        "Unpin Tab",
2891                                        Some(TogglePinTab.boxed_clone()),
2892                                        window.handler_for(&pane, move |pane, window, cx| {
2893                                            pane.unpin_tab_at(ix, window, cx);
2894                                        }),
2895                                    )
2896                                } else {
2897                                    this.entry(
2898                                        "Pin Tab",
2899                                        Some(TogglePinTab.boxed_clone()),
2900                                        window.handler_for(&pane, move |pane, window, cx| {
2901                                            pane.pin_tab_at(ix, window, cx);
2902                                        }),
2903                                    )
2904                                }
2905                            })
2906                        };
2907                        if let Some(entry) = single_entry_to_resolve {
2908                            let project_path = pane
2909                                .read(cx)
2910                                .item_for_entry(entry, cx)
2911                                .and_then(|item| item.project_path(cx));
2912                            let worktree = project_path.as_ref().and_then(|project_path| {
2913                                pane.read(cx)
2914                                    .project
2915                                    .upgrade()?
2916                                    .read(cx)
2917                                    .worktree_for_id(project_path.worktree_id, cx)
2918                            });
2919                            let has_relative_path = worktree.as_ref().is_some_and(|worktree| {
2920                                worktree
2921                                    .read(cx)
2922                                    .root_entry()
2923                                    .is_some_and(|entry| entry.is_dir())
2924                            });
2925
2926                            let entry_abs_path = pane.read(cx).entry_abs_path(entry, cx);
2927                            let parent_abs_path = entry_abs_path
2928                                .as_deref()
2929                                .and_then(|abs_path| Some(abs_path.parent()?.to_path_buf()));
2930                            let relative_path = project_path
2931                                .map(|project_path| project_path.path)
2932                                .filter(|_| has_relative_path);
2933
2934                            let visible_in_project_panel = relative_path.is_some()
2935                                && worktree.is_some_and(|worktree| worktree.read(cx).is_visible());
2936
2937                            let entry_id = entry.to_proto();
2938                            menu = menu
2939                                .separator()
2940                                .when_some(entry_abs_path, |menu, abs_path| {
2941                                    menu.entry(
2942                                        "Copy Path",
2943                                        Some(Box::new(zed_actions::workspace::CopyPath)),
2944                                        window.handler_for(&pane, move |_, _, cx| {
2945                                            cx.write_to_clipboard(ClipboardItem::new_string(
2946                                                abs_path.to_string_lossy().into_owned(),
2947                                            ));
2948                                        }),
2949                                    )
2950                                })
2951                                .when_some(relative_path, |menu, relative_path| {
2952                                    menu.entry(
2953                                        "Copy Relative Path",
2954                                        Some(Box::new(zed_actions::workspace::CopyRelativePath)),
2955                                        window.handler_for(&pane, move |this, _, cx| {
2956                                            let Some(project) = this.project.upgrade() else {
2957                                                return;
2958                                            };
2959                                            let path_style = project
2960                                                .update(cx, |project, cx| project.path_style(cx));
2961                                            cx.write_to_clipboard(ClipboardItem::new_string(
2962                                                relative_path.display(path_style).to_string(),
2963                                            ));
2964                                        }),
2965                                    )
2966                                })
2967                                .map(pin_tab_entries)
2968                                .separator()
2969                                .when(visible_in_project_panel, |menu| {
2970                                    menu.entry(
2971                                        "Reveal In Project Panel",
2972                                        Some(Box::new(RevealInProjectPanel::default())),
2973                                        window.handler_for(&pane, move |pane, _, cx| {
2974                                            pane.project
2975                                                .update(cx, |_, cx| {
2976                                                    cx.emit(project::Event::RevealInProjectPanel(
2977                                                        ProjectEntryId::from_proto(entry_id),
2978                                                    ))
2979                                                })
2980                                                .ok();
2981                                        }),
2982                                    )
2983                                })
2984                                .when_some(parent_abs_path, |menu, parent_abs_path| {
2985                                    menu.entry(
2986                                        "Open in Terminal",
2987                                        Some(Box::new(OpenInTerminal)),
2988                                        window.handler_for(&pane, move |_, window, cx| {
2989                                            window.dispatch_action(
2990                                                OpenTerminal {
2991                                                    working_directory: parent_abs_path.clone(),
2992                                                }
2993                                                .boxed_clone(),
2994                                                cx,
2995                                            );
2996                                        }),
2997                                    )
2998                                });
2999                        } else {
3000                            menu = menu.map(pin_tab_entries);
3001                        }
3002                    }
3003
3004                    menu.context(menu_context)
3005                })
3006            })
3007    }
3008
3009    fn render_tab_bar(&mut self, window: &mut Window, cx: &mut Context<Pane>) -> AnyElement {
3010        let focus_handle = self.focus_handle.clone();
3011        let navigate_backward = IconButton::new("navigate_backward", IconName::ArrowLeft)
3012            .icon_size(IconSize::Small)
3013            .on_click({
3014                let entity = cx.entity();
3015                move |_, window, cx| {
3016                    entity.update(cx, |pane, cx| {
3017                        pane.navigate_backward(&Default::default(), window, cx)
3018                    })
3019                }
3020            })
3021            .disabled(!self.can_navigate_backward())
3022            .tooltip({
3023                let focus_handle = focus_handle.clone();
3024                move |window, cx| {
3025                    Tooltip::for_action_in("Go Back", &GoBack, &focus_handle, window, cx)
3026                }
3027            });
3028
3029        let navigate_forward = IconButton::new("navigate_forward", IconName::ArrowRight)
3030            .icon_size(IconSize::Small)
3031            .on_click({
3032                let entity = cx.entity();
3033                move |_, window, cx| {
3034                    entity.update(cx, |pane, cx| {
3035                        pane.navigate_forward(&Default::default(), window, cx)
3036                    })
3037                }
3038            })
3039            .disabled(!self.can_navigate_forward())
3040            .tooltip({
3041                let focus_handle = focus_handle.clone();
3042                move |window, cx| {
3043                    Tooltip::for_action_in("Go Forward", &GoForward, &focus_handle, window, cx)
3044                }
3045            });
3046
3047        let mut tab_items = self
3048            .items
3049            .iter()
3050            .enumerate()
3051            .zip(tab_details(&self.items, window, cx))
3052            .map(|((ix, item), detail)| {
3053                self.render_tab(ix, &**item, detail, &focus_handle, window, cx)
3054            })
3055            .collect::<Vec<_>>();
3056        let tab_count = tab_items.len();
3057        if self.is_tab_pinned(tab_count) {
3058            log::warn!(
3059                "Pinned tab count ({}) exceeds actual tab count ({}). \
3060                This should not happen. If possible, add reproduction steps, \
3061                in a comment, to https://github.com/zed-industries/zed/issues/33342",
3062                self.pinned_tab_count,
3063                tab_count
3064            );
3065            self.pinned_tab_count = tab_count;
3066        }
3067        let unpinned_tabs = tab_items.split_off(self.pinned_tab_count);
3068        let pinned_tabs = tab_items;
3069        TabBar::new("tab_bar")
3070            .when(
3071                self.display_nav_history_buttons.unwrap_or_default(),
3072                |tab_bar| {
3073                    tab_bar
3074                        .start_child(navigate_backward)
3075                        .start_child(navigate_forward)
3076                },
3077            )
3078            .map(|tab_bar| {
3079                if self.show_tab_bar_buttons {
3080                    let render_tab_buttons = self.render_tab_bar_buttons.clone();
3081                    let (left_children, right_children) = render_tab_buttons(self, window, cx);
3082                    tab_bar
3083                        .start_children(left_children)
3084                        .end_children(right_children)
3085                } else {
3086                    tab_bar
3087                }
3088            })
3089            .children(pinned_tabs.len().ne(&0).then(|| {
3090                let max_scroll = self.tab_bar_scroll_handle.max_offset().width;
3091                // We need to check both because offset returns delta values even when the scroll handle is not scrollable
3092                let is_scrollable = !max_scroll.is_zero();
3093                let is_scrolled = self.tab_bar_scroll_handle.offset().x < px(0.);
3094                let has_active_unpinned_tab = self.active_item_index >= self.pinned_tab_count;
3095                h_flex()
3096                    .children(pinned_tabs)
3097                    .when(is_scrollable && is_scrolled, |this| {
3098                        this.when(has_active_unpinned_tab, |this| this.border_r_2())
3099                            .when(!has_active_unpinned_tab, |this| this.border_r_1())
3100                            .border_color(cx.theme().colors().border)
3101                    })
3102            }))
3103            .child(
3104                h_flex()
3105                    .id("unpinned tabs")
3106                    .overflow_x_scroll()
3107                    .w_full()
3108                    .track_scroll(&self.tab_bar_scroll_handle)
3109                    .on_scroll_wheel(cx.listener(|this, _, _, _| {
3110                        this.suppress_scroll = true;
3111                    }))
3112                    .children(unpinned_tabs)
3113                    .child(
3114                        div()
3115                            .id("tab_bar_drop_target")
3116                            .min_w_6()
3117                            // HACK: This empty child is currently necessary to force the drop target to appear
3118                            // despite us setting a min width above.
3119                            .child("")
3120                            // HACK: h_full doesn't occupy the complete height, using fixed height instead
3121                            .h(Tab::container_height(cx))
3122                            .flex_grow()
3123                            .drag_over::<DraggedTab>(|bar, _, _, cx| {
3124                                bar.bg(cx.theme().colors().drop_target_background)
3125                            })
3126                            .drag_over::<DraggedSelection>(|bar, _, _, cx| {
3127                                bar.bg(cx.theme().colors().drop_target_background)
3128                            })
3129                            .on_drop(cx.listener(
3130                                move |this, dragged_tab: &DraggedTab, window, cx| {
3131                                    this.drag_split_direction = None;
3132                                    this.handle_tab_drop(dragged_tab, this.items.len(), window, cx)
3133                                },
3134                            ))
3135                            .on_drop(cx.listener(
3136                                move |this, selection: &DraggedSelection, window, cx| {
3137                                    this.drag_split_direction = None;
3138                                    this.handle_project_entry_drop(
3139                                        &selection.active_selection.entry_id,
3140                                        Some(tab_count),
3141                                        window,
3142                                        cx,
3143                                    )
3144                                },
3145                            ))
3146                            .on_drop(cx.listener(move |this, paths, window, cx| {
3147                                this.drag_split_direction = None;
3148                                this.handle_external_paths_drop(paths, window, cx)
3149                            }))
3150                            .on_click(cx.listener(move |this, event: &ClickEvent, window, cx| {
3151                                if event.click_count() == 2 {
3152                                    window.dispatch_action(
3153                                        this.double_click_dispatch_action.boxed_clone(),
3154                                        cx,
3155                                    );
3156                                }
3157                            })),
3158                    ),
3159            )
3160            .into_any_element()
3161    }
3162
3163    pub fn render_menu_overlay(menu: &Entity<ContextMenu>) -> Div {
3164        div().absolute().bottom_0().right_0().size_0().child(
3165            deferred(anchored().anchor(Corner::TopRight).child(menu.clone())).with_priority(1),
3166        )
3167    }
3168
3169    pub fn set_zoomed(&mut self, zoomed: bool, cx: &mut Context<Self>) {
3170        self.zoomed = zoomed;
3171        cx.notify();
3172    }
3173
3174    pub fn is_zoomed(&self) -> bool {
3175        self.zoomed
3176    }
3177
3178    fn handle_drag_move<T: 'static>(
3179        &mut self,
3180        event: &DragMoveEvent<T>,
3181        window: &mut Window,
3182        cx: &mut Context<Self>,
3183    ) {
3184        let can_split_predicate = self.can_split_predicate.take();
3185        let can_split = match &can_split_predicate {
3186            Some(can_split_predicate) => {
3187                can_split_predicate(self, event.dragged_item(), window, cx)
3188            }
3189            None => false,
3190        };
3191        self.can_split_predicate = can_split_predicate;
3192        if !can_split {
3193            return;
3194        }
3195
3196        let rect = event.bounds.size;
3197
3198        let size = event.bounds.size.width.min(event.bounds.size.height)
3199            * WorkspaceSettings::get_global(cx).drop_target_size;
3200
3201        let relative_cursor = Point::new(
3202            event.event.position.x - event.bounds.left(),
3203            event.event.position.y - event.bounds.top(),
3204        );
3205
3206        let direction = if relative_cursor.x < size
3207            || relative_cursor.x > rect.width - size
3208            || relative_cursor.y < size
3209            || relative_cursor.y > rect.height - size
3210        {
3211            [
3212                SplitDirection::Up,
3213                SplitDirection::Right,
3214                SplitDirection::Down,
3215                SplitDirection::Left,
3216            ]
3217            .iter()
3218            .min_by_key(|side| match side {
3219                SplitDirection::Up => relative_cursor.y,
3220                SplitDirection::Right => rect.width - relative_cursor.x,
3221                SplitDirection::Down => rect.height - relative_cursor.y,
3222                SplitDirection::Left => relative_cursor.x,
3223            })
3224            .cloned()
3225        } else {
3226            None
3227        };
3228
3229        if direction != self.drag_split_direction {
3230            self.drag_split_direction = direction;
3231        }
3232    }
3233
3234    pub fn handle_tab_drop(
3235        &mut self,
3236        dragged_tab: &DraggedTab,
3237        ix: usize,
3238        window: &mut Window,
3239        cx: &mut Context<Self>,
3240    ) {
3241        if let Some(custom_drop_handle) = self.custom_drop_handle.clone()
3242            && let ControlFlow::Break(()) = custom_drop_handle(self, dragged_tab, window, cx)
3243        {
3244            return;
3245        }
3246        let mut to_pane = cx.entity();
3247        let split_direction = self.drag_split_direction;
3248        let item_id = dragged_tab.item.item_id();
3249        if let Some(preview_item_id) = self.preview_item_id
3250            && item_id == preview_item_id
3251        {
3252            self.set_preview_item_id(None, cx);
3253        }
3254
3255        let is_clone = cfg!(target_os = "macos") && window.modifiers().alt
3256            || cfg!(not(target_os = "macos")) && window.modifiers().control;
3257
3258        let from_pane = dragged_tab.pane.clone();
3259
3260        self.workspace
3261            .update(cx, |_, cx| {
3262                cx.defer_in(window, move |workspace, window, cx| {
3263                    if let Some(split_direction) = split_direction {
3264                        to_pane = workspace.split_pane(to_pane, split_direction, window, cx);
3265                    }
3266                    let database_id = workspace.database_id();
3267                    let was_pinned_in_from_pane = from_pane.read_with(cx, |pane, _| {
3268                        pane.index_for_item_id(item_id)
3269                            .is_some_and(|ix| pane.is_tab_pinned(ix))
3270                    });
3271                    let to_pane_old_length = to_pane.read(cx).items.len();
3272                    if is_clone {
3273                        let Some(item) = from_pane
3274                            .read(cx)
3275                            .items()
3276                            .find(|item| item.item_id() == item_id)
3277                            .cloned()
3278                        else {
3279                            return;
3280                        };
3281                        if let Some(item) = item.clone_on_split(database_id, window, cx) {
3282                            to_pane.update(cx, |pane, cx| {
3283                                pane.add_item(item, true, true, None, window, cx);
3284                            })
3285                        }
3286                    } else {
3287                        move_item(&from_pane, &to_pane, item_id, ix, true, window, cx);
3288                    }
3289                    to_pane.update(cx, |this, _| {
3290                        if to_pane == from_pane {
3291                            let actual_ix = this
3292                                .items
3293                                .iter()
3294                                .position(|item| item.item_id() == item_id)
3295                                .unwrap_or(0);
3296
3297                            let is_pinned_in_to_pane = this.is_tab_pinned(actual_ix);
3298
3299                            if !was_pinned_in_from_pane && is_pinned_in_to_pane {
3300                                this.pinned_tab_count += 1;
3301                            } else if was_pinned_in_from_pane && !is_pinned_in_to_pane {
3302                                this.pinned_tab_count -= 1;
3303                            }
3304                        } else if this.items.len() >= to_pane_old_length {
3305                            let is_pinned_in_to_pane = this.is_tab_pinned(ix);
3306                            let item_created_pane = to_pane_old_length == 0;
3307                            let is_first_position = ix == 0;
3308                            let was_dropped_at_beginning = item_created_pane || is_first_position;
3309                            let should_remain_pinned = is_pinned_in_to_pane
3310                                || (was_pinned_in_from_pane && was_dropped_at_beginning);
3311
3312                            if should_remain_pinned {
3313                                this.pinned_tab_count += 1;
3314                            }
3315                        }
3316                    });
3317                });
3318            })
3319            .log_err();
3320    }
3321
3322    fn handle_dragged_selection_drop(
3323        &mut self,
3324        dragged_selection: &DraggedSelection,
3325        dragged_onto: Option<usize>,
3326        window: &mut Window,
3327        cx: &mut Context<Self>,
3328    ) {
3329        if let Some(custom_drop_handle) = self.custom_drop_handle.clone()
3330            && let ControlFlow::Break(()) = custom_drop_handle(self, dragged_selection, window, cx)
3331        {
3332            return;
3333        }
3334        self.handle_project_entry_drop(
3335            &dragged_selection.active_selection.entry_id,
3336            dragged_onto,
3337            window,
3338            cx,
3339        );
3340    }
3341
3342    fn handle_project_entry_drop(
3343        &mut self,
3344        project_entry_id: &ProjectEntryId,
3345        target: Option<usize>,
3346        window: &mut Window,
3347        cx: &mut Context<Self>,
3348    ) {
3349        if let Some(custom_drop_handle) = self.custom_drop_handle.clone()
3350            && let ControlFlow::Break(()) = custom_drop_handle(self, project_entry_id, window, cx)
3351        {
3352            return;
3353        }
3354        let mut to_pane = cx.entity();
3355        let split_direction = self.drag_split_direction;
3356        let project_entry_id = *project_entry_id;
3357        self.workspace
3358            .update(cx, |_, cx| {
3359                cx.defer_in(window, move |workspace, window, cx| {
3360                    if let Some(project_path) = workspace
3361                        .project()
3362                        .read(cx)
3363                        .path_for_entry(project_entry_id, cx)
3364                    {
3365                        let load_path_task = workspace.load_path(project_path.clone(), window, cx);
3366                        cx.spawn_in(window, async move |workspace, cx| {
3367                            if let Some((project_entry_id, build_item)) =
3368                                load_path_task.await.notify_async_err(cx)
3369                            {
3370                                let (to_pane, new_item_handle) = workspace
3371                                    .update_in(cx, |workspace, window, cx| {
3372                                        if let Some(split_direction) = split_direction {
3373                                            to_pane = workspace.split_pane(
3374                                                to_pane,
3375                                                split_direction,
3376                                                window,
3377                                                cx,
3378                                            );
3379                                        }
3380                                        let new_item_handle = to_pane.update(cx, |pane, cx| {
3381                                            pane.open_item(
3382                                                project_entry_id,
3383                                                project_path,
3384                                                true,
3385                                                false,
3386                                                true,
3387                                                target,
3388                                                window,
3389                                                cx,
3390                                                build_item,
3391                                            )
3392                                        });
3393                                        (to_pane, new_item_handle)
3394                                    })
3395                                    .log_err()?;
3396                                to_pane
3397                                    .update_in(cx, |this, window, cx| {
3398                                        let Some(index) = this.index_for_item(&*new_item_handle)
3399                                        else {
3400                                            return;
3401                                        };
3402
3403                                        if target.is_some_and(|target| this.is_tab_pinned(target)) {
3404                                            this.pin_tab_at(index, window, cx);
3405                                        }
3406                                    })
3407                                    .ok()?
3408                            }
3409                            Some(())
3410                        })
3411                        .detach();
3412                    };
3413                });
3414            })
3415            .log_err();
3416    }
3417
3418    fn handle_external_paths_drop(
3419        &mut self,
3420        paths: &ExternalPaths,
3421        window: &mut Window,
3422        cx: &mut Context<Self>,
3423    ) {
3424        if let Some(custom_drop_handle) = self.custom_drop_handle.clone()
3425            && let ControlFlow::Break(()) = custom_drop_handle(self, paths, window, cx)
3426        {
3427            return;
3428        }
3429        let mut to_pane = cx.entity();
3430        let mut split_direction = self.drag_split_direction;
3431        let paths = paths.paths().to_vec();
3432        let is_remote = self
3433            .workspace
3434            .update(cx, |workspace, cx| {
3435                if workspace.project().read(cx).is_via_collab() {
3436                    workspace.show_error(
3437                        &anyhow::anyhow!("Cannot drop files on a remote project"),
3438                        cx,
3439                    );
3440                    true
3441                } else {
3442                    false
3443                }
3444            })
3445            .unwrap_or(true);
3446        if is_remote {
3447            return;
3448        }
3449
3450        self.workspace
3451            .update(cx, |workspace, cx| {
3452                let fs = Arc::clone(workspace.project().read(cx).fs());
3453                cx.spawn_in(window, async move |workspace, cx| {
3454                    let mut is_file_checks = FuturesUnordered::new();
3455                    for path in &paths {
3456                        is_file_checks.push(fs.is_file(path))
3457                    }
3458                    let mut has_files_to_open = false;
3459                    while let Some(is_file) = is_file_checks.next().await {
3460                        if is_file {
3461                            has_files_to_open = true;
3462                            break;
3463                        }
3464                    }
3465                    drop(is_file_checks);
3466                    if !has_files_to_open {
3467                        split_direction = None;
3468                    }
3469
3470                    if let Ok((open_task, to_pane)) =
3471                        workspace.update_in(cx, |workspace, window, cx| {
3472                            if let Some(split_direction) = split_direction {
3473                                to_pane =
3474                                    workspace.split_pane(to_pane, split_direction, window, cx);
3475                            }
3476                            (
3477                                workspace.open_paths(
3478                                    paths,
3479                                    OpenOptions {
3480                                        visible: Some(OpenVisible::OnlyDirectories),
3481                                        ..Default::default()
3482                                    },
3483                                    Some(to_pane.downgrade()),
3484                                    window,
3485                                    cx,
3486                                ),
3487                                to_pane,
3488                            )
3489                        })
3490                    {
3491                        let opened_items: Vec<_> = open_task.await;
3492                        _ = workspace.update_in(cx, |workspace, window, cx| {
3493                            for item in opened_items.into_iter().flatten() {
3494                                if let Err(e) = item {
3495                                    workspace.show_error(&e, cx);
3496                                }
3497                            }
3498                            if to_pane.read(cx).items_len() == 0 {
3499                                workspace.remove_pane(to_pane, None, window, cx);
3500                            }
3501                        });
3502                    }
3503                })
3504                .detach();
3505            })
3506            .log_err();
3507    }
3508
3509    pub fn display_nav_history_buttons(&mut self, display: Option<bool>) {
3510        self.display_nav_history_buttons = display;
3511    }
3512
3513    fn pinned_item_ids(&self) -> Vec<EntityId> {
3514        self.items
3515            .iter()
3516            .enumerate()
3517            .filter_map(|(index, item)| {
3518                if self.is_tab_pinned(index) {
3519                    return Some(item.item_id());
3520                }
3521
3522                None
3523            })
3524            .collect()
3525    }
3526
3527    fn clean_item_ids(&self, cx: &mut Context<Pane>) -> Vec<EntityId> {
3528        self.items()
3529            .filter_map(|item| {
3530                if !item.is_dirty(cx) {
3531                    return Some(item.item_id());
3532                }
3533
3534                None
3535            })
3536            .collect()
3537    }
3538
3539    fn to_the_side_item_ids(&self, item_id: EntityId, side: Side) -> Vec<EntityId> {
3540        match side {
3541            Side::Left => self
3542                .items()
3543                .take_while(|item| item.item_id() != item_id)
3544                .map(|item| item.item_id())
3545                .collect(),
3546            Side::Right => self
3547                .items()
3548                .rev()
3549                .take_while(|item| item.item_id() != item_id)
3550                .map(|item| item.item_id())
3551                .collect(),
3552        }
3553    }
3554
3555    fn multibuffer_item_ids(&self, cx: &mut Context<Pane>) -> Vec<EntityId> {
3556        self.items()
3557            .filter(|item| item.buffer_kind(cx) == ItemBufferKind::Multibuffer)
3558            .map(|item| item.item_id())
3559            .collect()
3560    }
3561
3562    pub fn drag_split_direction(&self) -> Option<SplitDirection> {
3563        self.drag_split_direction
3564    }
3565
3566    pub fn set_zoom_out_on_close(&mut self, zoom_out_on_close: bool) {
3567        self.zoom_out_on_close = zoom_out_on_close;
3568    }
3569}
3570
3571fn default_render_tab_bar_buttons(
3572    pane: &mut Pane,
3573    window: &mut Window,
3574    cx: &mut Context<Pane>,
3575) -> (Option<AnyElement>, Option<AnyElement>) {
3576    if !pane.has_focus(window, cx) && !pane.context_menu_focused(window, cx) {
3577        return (None, None);
3578    }
3579    // Ideally we would return a vec of elements here to pass directly to the [TabBar]'s
3580    // `end_slot`, but due to needing a view here that isn't possible.
3581    let right_children = h_flex()
3582        // Instead we need to replicate the spacing from the [TabBar]'s `end_slot` here.
3583        .gap(DynamicSpacing::Base04.rems(cx))
3584        .child(
3585            PopoverMenu::new("pane-tab-bar-popover-menu")
3586                .trigger_with_tooltip(
3587                    IconButton::new("plus", IconName::Plus).icon_size(IconSize::Small),
3588                    Tooltip::text("New..."),
3589                )
3590                .anchor(Corner::TopRight)
3591                .with_handle(pane.new_item_context_menu_handle.clone())
3592                .menu(move |window, cx| {
3593                    Some(ContextMenu::build(window, cx, |menu, _, _| {
3594                        menu.action("New File", NewFile.boxed_clone())
3595                            .action("Open File", ToggleFileFinder::default().boxed_clone())
3596                            .separator()
3597                            .action(
3598                                "Search Project",
3599                                DeploySearch {
3600                                    replace_enabled: false,
3601                                    included_files: None,
3602                                    excluded_files: None,
3603                                }
3604                                .boxed_clone(),
3605                            )
3606                            .action("Search Symbols", ToggleProjectSymbols.boxed_clone())
3607                            .separator()
3608                            .action("New Terminal", NewTerminal.boxed_clone())
3609                    }))
3610                }),
3611        )
3612        .child(
3613            PopoverMenu::new("pane-tab-bar-split")
3614                .trigger_with_tooltip(
3615                    IconButton::new("split", IconName::Split).icon_size(IconSize::Small),
3616                    Tooltip::text("Split Pane"),
3617                )
3618                .anchor(Corner::TopRight)
3619                .with_handle(pane.split_item_context_menu_handle.clone())
3620                .menu(move |window, cx| {
3621                    ContextMenu::build(window, cx, |menu, _, _| {
3622                        menu.action("Split Right", SplitRight.boxed_clone())
3623                            .action("Split Left", SplitLeft.boxed_clone())
3624                            .action("Split Up", SplitUp.boxed_clone())
3625                            .action("Split Down", SplitDown.boxed_clone())
3626                    })
3627                    .into()
3628                }),
3629        )
3630        .child({
3631            let zoomed = pane.is_zoomed();
3632            IconButton::new("toggle_zoom", IconName::Maximize)
3633                .icon_size(IconSize::Small)
3634                .toggle_state(zoomed)
3635                .selected_icon(IconName::Minimize)
3636                .on_click(cx.listener(|pane, _, window, cx| {
3637                    pane.toggle_zoom(&crate::ToggleZoom, window, cx);
3638                }))
3639                .tooltip(move |window, cx| {
3640                    Tooltip::for_action(
3641                        if zoomed { "Zoom Out" } else { "Zoom In" },
3642                        &ToggleZoom,
3643                        window,
3644                        cx,
3645                    )
3646                })
3647        })
3648        .into_any_element()
3649        .into();
3650    (None, right_children)
3651}
3652
3653impl Focusable for Pane {
3654    fn focus_handle(&self, _cx: &App) -> FocusHandle {
3655        self.focus_handle.clone()
3656    }
3657}
3658
3659impl Render for Pane {
3660    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
3661        let mut key_context = KeyContext::new_with_defaults();
3662        key_context.add("Pane");
3663        if self.active_item().is_none() {
3664            key_context.add("EmptyPane");
3665        }
3666
3667        let should_display_tab_bar = self.should_display_tab_bar.clone();
3668        let display_tab_bar = should_display_tab_bar(window, cx);
3669        let Some(project) = self.project.upgrade() else {
3670            return div().track_focus(&self.focus_handle(cx));
3671        };
3672        let is_local = project.read(cx).is_local();
3673
3674        v_flex()
3675            .key_context(key_context)
3676            .track_focus(&self.focus_handle(cx))
3677            .size_full()
3678            .flex_none()
3679            .overflow_hidden()
3680            .on_action(
3681                cx.listener(|pane, _: &SplitLeft, _, cx| pane.split(SplitDirection::Left, cx)),
3682            )
3683            .on_action(cx.listener(|pane, _: &SplitUp, _, cx| pane.split(SplitDirection::Up, cx)))
3684            .on_action(cx.listener(|pane, _: &SplitHorizontal, _, cx| {
3685                pane.split(SplitDirection::horizontal(cx), cx)
3686            }))
3687            .on_action(cx.listener(|pane, _: &SplitVertical, _, cx| {
3688                pane.split(SplitDirection::vertical(cx), cx)
3689            }))
3690            .on_action(
3691                cx.listener(|pane, _: &SplitRight, _, cx| pane.split(SplitDirection::Right, cx)),
3692            )
3693            .on_action(
3694                cx.listener(|pane, _: &SplitDown, _, cx| pane.split(SplitDirection::Down, cx)),
3695            )
3696            .on_action(cx.listener(|pane, _: &SplitAndMoveUp, _, cx| {
3697                pane.split_and_move(SplitDirection::Up, cx)
3698            }))
3699            .on_action(cx.listener(|pane, _: &SplitAndMoveDown, _, cx| {
3700                pane.split_and_move(SplitDirection::Down, cx)
3701            }))
3702            .on_action(cx.listener(|pane, _: &SplitAndMoveLeft, _, cx| {
3703                pane.split_and_move(SplitDirection::Left, cx)
3704            }))
3705            .on_action(cx.listener(|pane, _: &SplitAndMoveRight, _, cx| {
3706                pane.split_and_move(SplitDirection::Right, cx)
3707            }))
3708            .on_action(cx.listener(|_, _: &JoinIntoNext, _, cx| {
3709                cx.emit(Event::JoinIntoNext);
3710            }))
3711            .on_action(cx.listener(|_, _: &JoinAll, _, cx| {
3712                cx.emit(Event::JoinAll);
3713            }))
3714            .on_action(cx.listener(Pane::toggle_zoom))
3715            .on_action(cx.listener(Self::navigate_backward))
3716            .on_action(cx.listener(Self::navigate_forward))
3717            .on_action(
3718                cx.listener(|pane: &mut Pane, action: &ActivateItem, window, cx| {
3719                    pane.activate_item(
3720                        action.0.min(pane.items.len().saturating_sub(1)),
3721                        true,
3722                        true,
3723                        window,
3724                        cx,
3725                    );
3726                }),
3727            )
3728            .on_action(cx.listener(Self::alternate_file))
3729            .on_action(cx.listener(Self::activate_last_item))
3730            .on_action(cx.listener(Self::activate_previous_item))
3731            .on_action(cx.listener(Self::activate_next_item))
3732            .on_action(cx.listener(Self::swap_item_left))
3733            .on_action(cx.listener(Self::swap_item_right))
3734            .on_action(cx.listener(Self::toggle_pin_tab))
3735            .on_action(cx.listener(Self::unpin_all_tabs))
3736            .when(PreviewTabsSettings::get_global(cx).enabled, |this| {
3737                this.on_action(cx.listener(|pane: &mut Pane, _: &TogglePreviewTab, _, cx| {
3738                    if let Some(active_item_id) = pane.active_item().map(|i| i.item_id()) {
3739                        if pane.is_active_preview_item(active_item_id) {
3740                            pane.set_preview_item_id(None, cx);
3741                        } else {
3742                            pane.set_preview_item_id(Some(active_item_id), cx);
3743                        }
3744                    }
3745                }))
3746            })
3747            .on_action(
3748                cx.listener(|pane: &mut Self, action: &CloseActiveItem, window, cx| {
3749                    pane.close_active_item(action, window, cx)
3750                        .detach_and_log_err(cx)
3751                }),
3752            )
3753            .on_action(
3754                cx.listener(|pane: &mut Self, action: &CloseOtherItems, window, cx| {
3755                    pane.close_other_items(action, None, window, cx)
3756                        .detach_and_log_err(cx);
3757                }),
3758            )
3759            .on_action(
3760                cx.listener(|pane: &mut Self, action: &CloseCleanItems, window, cx| {
3761                    pane.close_clean_items(action, window, cx)
3762                        .detach_and_log_err(cx)
3763                }),
3764            )
3765            .on_action(cx.listener(
3766                |pane: &mut Self, action: &CloseItemsToTheLeft, window, cx| {
3767                    pane.close_items_to_the_left_by_id(None, action, window, cx)
3768                        .detach_and_log_err(cx)
3769                },
3770            ))
3771            .on_action(cx.listener(
3772                |pane: &mut Self, action: &CloseItemsToTheRight, window, cx| {
3773                    pane.close_items_to_the_right_by_id(None, action, window, cx)
3774                        .detach_and_log_err(cx)
3775                },
3776            ))
3777            .on_action(
3778                cx.listener(|pane: &mut Self, action: &CloseAllItems, window, cx| {
3779                    pane.close_all_items(action, window, cx)
3780                        .detach_and_log_err(cx)
3781                }),
3782            )
3783            .on_action(cx.listener(
3784                |pane: &mut Self, action: &CloseMultibufferItems, window, cx| {
3785                    pane.close_multibuffer_items(action, window, cx)
3786                        .detach_and_log_err(cx)
3787                },
3788            ))
3789            .on_action(
3790                cx.listener(|pane: &mut Self, action: &RevealInProjectPanel, _, cx| {
3791                    let entry_id = action
3792                        .entry_id
3793                        .map(ProjectEntryId::from_proto)
3794                        .or_else(|| pane.active_item()?.project_entry_ids(cx).first().copied());
3795                    if let Some(entry_id) = entry_id {
3796                        pane.project
3797                            .update(cx, |_, cx| {
3798                                cx.emit(project::Event::RevealInProjectPanel(entry_id))
3799                            })
3800                            .ok();
3801                    }
3802                }),
3803            )
3804            .on_action(cx.listener(|_, _: &menu::Cancel, window, cx| {
3805                if cx.stop_active_drag(window) {
3806                } else {
3807                    cx.propagate();
3808                }
3809            }))
3810            .when(self.active_item().is_some() && display_tab_bar, |pane| {
3811                pane.child((self.render_tab_bar.clone())(self, window, cx))
3812            })
3813            .child({
3814                let has_worktrees = project.read(cx).visible_worktrees(cx).next().is_some();
3815                // main content
3816                div()
3817                    .flex_1()
3818                    .relative()
3819                    .group("")
3820                    .overflow_hidden()
3821                    .on_drag_move::<DraggedTab>(cx.listener(Self::handle_drag_move))
3822                    .on_drag_move::<DraggedSelection>(cx.listener(Self::handle_drag_move))
3823                    .when(is_local, |div| {
3824                        div.on_drag_move::<ExternalPaths>(cx.listener(Self::handle_drag_move))
3825                    })
3826                    .map(|div| {
3827                        if let Some(item) = self.active_item() {
3828                            div.id("pane_placeholder")
3829                                .v_flex()
3830                                .size_full()
3831                                .overflow_hidden()
3832                                .child(self.toolbar.clone())
3833                                .child(item.to_any())
3834                        } else {
3835                            let placeholder = div
3836                                .id("pane_placeholder")
3837                                .h_flex()
3838                                .size_full()
3839                                .justify_center()
3840                                .on_click(cx.listener(
3841                                    move |this, event: &ClickEvent, window, cx| {
3842                                        if event.click_count() == 2 {
3843                                            window.dispatch_action(
3844                                                this.double_click_dispatch_action.boxed_clone(),
3845                                                cx,
3846                                            );
3847                                        }
3848                                    },
3849                                ));
3850                            if has_worktrees {
3851                                placeholder
3852                            } else {
3853                                placeholder.child(
3854                                    Label::new("Open a file or project to get started.")
3855                                        .color(Color::Muted),
3856                                )
3857                            }
3858                        }
3859                    })
3860                    .child(
3861                        // drag target
3862                        div()
3863                            .invisible()
3864                            .absolute()
3865                            .bg(cx.theme().colors().drop_target_background)
3866                            .group_drag_over::<DraggedTab>("", |style| style.visible())
3867                            .group_drag_over::<DraggedSelection>("", |style| style.visible())
3868                            .when(is_local, |div| {
3869                                div.group_drag_over::<ExternalPaths>("", |style| style.visible())
3870                            })
3871                            .when_some(self.can_drop_predicate.clone(), |this, p| {
3872                                this.can_drop(move |a, window, cx| p(a, window, cx))
3873                            })
3874                            .on_drop(cx.listener(move |this, dragged_tab, window, cx| {
3875                                this.handle_tab_drop(
3876                                    dragged_tab,
3877                                    this.active_item_index(),
3878                                    window,
3879                                    cx,
3880                                )
3881                            }))
3882                            .on_drop(cx.listener(
3883                                move |this, selection: &DraggedSelection, window, cx| {
3884                                    this.handle_dragged_selection_drop(selection, None, window, cx)
3885                                },
3886                            ))
3887                            .on_drop(cx.listener(move |this, paths, window, cx| {
3888                                this.handle_external_paths_drop(paths, window, cx)
3889                            }))
3890                            .map(|div| {
3891                                let size = DefiniteLength::Fraction(0.5);
3892                                match self.drag_split_direction {
3893                                    None => div.top_0().right_0().bottom_0().left_0(),
3894                                    Some(SplitDirection::Up) => {
3895                                        div.top_0().left_0().right_0().h(size)
3896                                    }
3897                                    Some(SplitDirection::Down) => {
3898                                        div.left_0().bottom_0().right_0().h(size)
3899                                    }
3900                                    Some(SplitDirection::Left) => {
3901                                        div.top_0().left_0().bottom_0().w(size)
3902                                    }
3903                                    Some(SplitDirection::Right) => {
3904                                        div.top_0().bottom_0().right_0().w(size)
3905                                    }
3906                                }
3907                            }),
3908                    )
3909            })
3910            .on_mouse_down(
3911                MouseButton::Navigate(NavigationDirection::Back),
3912                cx.listener(|pane, _, window, cx| {
3913                    if let Some(workspace) = pane.workspace.upgrade() {
3914                        let pane = cx.entity().downgrade();
3915                        window.defer(cx, move |window, cx| {
3916                            workspace.update(cx, |workspace, cx| {
3917                                workspace.go_back(pane, window, cx).detach_and_log_err(cx)
3918                            })
3919                        })
3920                    }
3921                }),
3922            )
3923            .on_mouse_down(
3924                MouseButton::Navigate(NavigationDirection::Forward),
3925                cx.listener(|pane, _, window, cx| {
3926                    if let Some(workspace) = pane.workspace.upgrade() {
3927                        let pane = cx.entity().downgrade();
3928                        window.defer(cx, move |window, cx| {
3929                            workspace.update(cx, |workspace, cx| {
3930                                workspace
3931                                    .go_forward(pane, window, cx)
3932                                    .detach_and_log_err(cx)
3933                            })
3934                        })
3935                    }
3936                }),
3937            )
3938    }
3939}
3940
3941impl ItemNavHistory {
3942    pub fn push<D: 'static + Send + Any>(&mut self, data: Option<D>, cx: &mut App) {
3943        if self
3944            .item
3945            .upgrade()
3946            .is_some_and(|item| item.include_in_nav_history())
3947        {
3948            self.history
3949                .push(data, self.item.clone(), self.is_preview, cx);
3950        }
3951    }
3952
3953    pub fn pop_backward(&mut self, cx: &mut App) -> Option<NavigationEntry> {
3954        self.history.pop(NavigationMode::GoingBack, cx)
3955    }
3956
3957    pub fn pop_forward(&mut self, cx: &mut App) -> Option<NavigationEntry> {
3958        self.history.pop(NavigationMode::GoingForward, cx)
3959    }
3960}
3961
3962impl NavHistory {
3963    pub fn for_each_entry(
3964        &self,
3965        cx: &App,
3966        mut f: impl FnMut(&NavigationEntry, (ProjectPath, Option<PathBuf>)),
3967    ) {
3968        let borrowed_history = self.0.lock();
3969        borrowed_history
3970            .forward_stack
3971            .iter()
3972            .chain(borrowed_history.backward_stack.iter())
3973            .chain(borrowed_history.closed_stack.iter())
3974            .for_each(|entry| {
3975                if let Some(project_and_abs_path) =
3976                    borrowed_history.paths_by_item.get(&entry.item.id())
3977                {
3978                    f(entry, project_and_abs_path.clone());
3979                } else if let Some(item) = entry.item.upgrade()
3980                    && let Some(path) = item.project_path(cx)
3981                {
3982                    f(entry, (path, None));
3983                }
3984            })
3985    }
3986
3987    pub fn set_mode(&mut self, mode: NavigationMode) {
3988        self.0.lock().mode = mode;
3989    }
3990
3991    pub fn mode(&self) -> NavigationMode {
3992        self.0.lock().mode
3993    }
3994
3995    pub fn disable(&mut self) {
3996        self.0.lock().mode = NavigationMode::Disabled;
3997    }
3998
3999    pub fn enable(&mut self) {
4000        self.0.lock().mode = NavigationMode::Normal;
4001    }
4002
4003    pub fn pop(&mut self, mode: NavigationMode, cx: &mut App) -> Option<NavigationEntry> {
4004        let mut state = self.0.lock();
4005        let entry = match mode {
4006            NavigationMode::Normal | NavigationMode::Disabled | NavigationMode::ClosingItem => {
4007                return None;
4008            }
4009            NavigationMode::GoingBack => &mut state.backward_stack,
4010            NavigationMode::GoingForward => &mut state.forward_stack,
4011            NavigationMode::ReopeningClosedItem => &mut state.closed_stack,
4012        }
4013        .pop_back();
4014        if entry.is_some() {
4015            state.did_update(cx);
4016        }
4017        entry
4018    }
4019
4020    pub fn push<D: 'static + Send + Any>(
4021        &mut self,
4022        data: Option<D>,
4023        item: Arc<dyn WeakItemHandle>,
4024        is_preview: bool,
4025        cx: &mut App,
4026    ) {
4027        let state = &mut *self.0.lock();
4028        match state.mode {
4029            NavigationMode::Disabled => {}
4030            NavigationMode::Normal | NavigationMode::ReopeningClosedItem => {
4031                if state.backward_stack.len() >= MAX_NAVIGATION_HISTORY_LEN {
4032                    state.backward_stack.pop_front();
4033                }
4034                state.backward_stack.push_back(NavigationEntry {
4035                    item,
4036                    data: data.map(|data| Box::new(data) as Box<dyn Any + Send>),
4037                    timestamp: state.next_timestamp.fetch_add(1, Ordering::SeqCst),
4038                    is_preview,
4039                });
4040                state.forward_stack.clear();
4041            }
4042            NavigationMode::GoingBack => {
4043                if state.forward_stack.len() >= MAX_NAVIGATION_HISTORY_LEN {
4044                    state.forward_stack.pop_front();
4045                }
4046                state.forward_stack.push_back(NavigationEntry {
4047                    item,
4048                    data: data.map(|data| Box::new(data) as Box<dyn Any + Send>),
4049                    timestamp: state.next_timestamp.fetch_add(1, Ordering::SeqCst),
4050                    is_preview,
4051                });
4052            }
4053            NavigationMode::GoingForward => {
4054                if state.backward_stack.len() >= MAX_NAVIGATION_HISTORY_LEN {
4055                    state.backward_stack.pop_front();
4056                }
4057                state.backward_stack.push_back(NavigationEntry {
4058                    item,
4059                    data: data.map(|data| Box::new(data) as Box<dyn Any + Send>),
4060                    timestamp: state.next_timestamp.fetch_add(1, Ordering::SeqCst),
4061                    is_preview,
4062                });
4063            }
4064            NavigationMode::ClosingItem => {
4065                if state.closed_stack.len() >= MAX_NAVIGATION_HISTORY_LEN {
4066                    state.closed_stack.pop_front();
4067                }
4068                state.closed_stack.push_back(NavigationEntry {
4069                    item,
4070                    data: data.map(|data| Box::new(data) as Box<dyn Any + Send>),
4071                    timestamp: state.next_timestamp.fetch_add(1, Ordering::SeqCst),
4072                    is_preview,
4073                });
4074            }
4075        }
4076        state.did_update(cx);
4077    }
4078
4079    pub fn remove_item(&mut self, item_id: EntityId) {
4080        let mut state = self.0.lock();
4081        state.paths_by_item.remove(&item_id);
4082        state
4083            .backward_stack
4084            .retain(|entry| entry.item.id() != item_id);
4085        state
4086            .forward_stack
4087            .retain(|entry| entry.item.id() != item_id);
4088        state
4089            .closed_stack
4090            .retain(|entry| entry.item.id() != item_id);
4091    }
4092
4093    pub fn path_for_item(&self, item_id: EntityId) -> Option<(ProjectPath, Option<PathBuf>)> {
4094        self.0.lock().paths_by_item.get(&item_id).cloned()
4095    }
4096}
4097
4098impl NavHistoryState {
4099    pub fn did_update(&self, cx: &mut App) {
4100        if let Some(pane) = self.pane.upgrade() {
4101            cx.defer(move |cx| {
4102                pane.update(cx, |pane, cx| pane.history_updated(cx));
4103            });
4104        }
4105    }
4106}
4107
4108fn dirty_message_for(buffer_path: Option<ProjectPath>, path_style: PathStyle) -> String {
4109    let path = buffer_path
4110        .as_ref()
4111        .and_then(|p| {
4112            let path = p.path.display(path_style);
4113            if path.is_empty() { None } else { Some(path) }
4114        })
4115        .unwrap_or("This buffer".into());
4116    let path = truncate_and_remove_front(&path, 80);
4117    format!("{path} contains unsaved edits. Do you want to save it?")
4118}
4119
4120pub fn tab_details(items: &[Box<dyn ItemHandle>], _window: &Window, cx: &App) -> Vec<usize> {
4121    let mut tab_details = items.iter().map(|_| 0).collect::<Vec<_>>();
4122    let mut tab_descriptions = HashMap::default();
4123    let mut done = false;
4124    while !done {
4125        done = true;
4126
4127        // Store item indices by their tab description.
4128        for (ix, (item, detail)) in items.iter().zip(&tab_details).enumerate() {
4129            let description = item.tab_content_text(*detail, cx);
4130            if *detail == 0 || description != item.tab_content_text(detail - 1, cx) {
4131                tab_descriptions
4132                    .entry(description)
4133                    .or_insert(Vec::new())
4134                    .push(ix);
4135            }
4136        }
4137
4138        // If two or more items have the same tab description, increase their level
4139        // of detail and try again.
4140        for (_, item_ixs) in tab_descriptions.drain() {
4141            if item_ixs.len() > 1 {
4142                done = false;
4143                for ix in item_ixs {
4144                    tab_details[ix] += 1;
4145                }
4146            }
4147        }
4148    }
4149
4150    tab_details
4151}
4152
4153pub fn render_item_indicator(item: Box<dyn ItemHandle>, cx: &App) -> Option<Indicator> {
4154    maybe!({
4155        let indicator_color = match (item.has_conflict(cx), item.is_dirty(cx)) {
4156            (true, _) => Color::Warning,
4157            (_, true) => Color::Accent,
4158            (false, false) => return None,
4159        };
4160
4161        Some(Indicator::dot().color(indicator_color))
4162    })
4163}
4164
4165impl Render for DraggedTab {
4166    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
4167        let ui_font = ThemeSettings::get_global(cx).ui_font.clone();
4168        let label = self.item.tab_content(
4169            TabContentParams {
4170                detail: Some(self.detail),
4171                selected: false,
4172                preview: false,
4173                deemphasized: false,
4174            },
4175            window,
4176            cx,
4177        );
4178        Tab::new("")
4179            .toggle_state(self.is_active)
4180            .child(label)
4181            .render(window, cx)
4182            .font(ui_font)
4183    }
4184}
4185
4186#[cfg(test)]
4187mod tests {
4188    use std::num::NonZero;
4189
4190    use super::*;
4191    use crate::item::test::{TestItem, TestProjectItem};
4192    use gpui::{TestAppContext, VisualTestContext, size};
4193    use project::FakeFs;
4194    use settings::SettingsStore;
4195    use theme::LoadThemes;
4196    use util::TryFutureExt;
4197
4198    #[gpui::test]
4199    async fn test_add_item_capped_to_max_tabs(cx: &mut TestAppContext) {
4200        init_test(cx);
4201        let fs = FakeFs::new(cx.executor());
4202
4203        let project = Project::test(fs, None, cx).await;
4204        let (workspace, cx) =
4205            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4206        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4207
4208        for i in 0..7 {
4209            add_labeled_item(&pane, format!("{}", i).as_str(), false, cx);
4210        }
4211
4212        set_max_tabs(cx, Some(5));
4213        add_labeled_item(&pane, "7", false, cx);
4214        // Remove items to respect the max tab cap.
4215        assert_item_labels(&pane, ["3", "4", "5", "6", "7*"], cx);
4216        pane.update_in(cx, |pane, window, cx| {
4217            pane.activate_item(0, false, false, window, cx);
4218        });
4219        add_labeled_item(&pane, "X", false, cx);
4220        // Respect activation order.
4221        assert_item_labels(&pane, ["3", "X*", "5", "6", "7"], cx);
4222
4223        for i in 0..7 {
4224            add_labeled_item(&pane, format!("D{}", i).as_str(), true, cx);
4225        }
4226        // Keeps dirty items, even over max tab cap.
4227        assert_item_labels(
4228            &pane,
4229            ["D0^", "D1^", "D2^", "D3^", "D4^", "D5^", "D6*^"],
4230            cx,
4231        );
4232
4233        set_max_tabs(cx, None);
4234        for i in 0..7 {
4235            add_labeled_item(&pane, format!("N{}", i).as_str(), false, cx);
4236        }
4237        // No cap when max tabs is None.
4238        assert_item_labels(
4239            &pane,
4240            [
4241                "D0^", "D1^", "D2^", "D3^", "D4^", "D5^", "D6^", "N0", "N1", "N2", "N3", "N4",
4242                "N5", "N6*",
4243            ],
4244            cx,
4245        );
4246    }
4247
4248    #[gpui::test]
4249    async fn test_reduce_max_tabs_closes_existing_items(cx: &mut TestAppContext) {
4250        init_test(cx);
4251        let fs = FakeFs::new(cx.executor());
4252
4253        let project = Project::test(fs, None, cx).await;
4254        let (workspace, cx) =
4255            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4256        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4257
4258        add_labeled_item(&pane, "A", false, cx);
4259        add_labeled_item(&pane, "B", false, cx);
4260        let item_c = add_labeled_item(&pane, "C", false, cx);
4261        let item_d = add_labeled_item(&pane, "D", false, cx);
4262        add_labeled_item(&pane, "E", false, cx);
4263        add_labeled_item(&pane, "Settings", false, cx);
4264        assert_item_labels(&pane, ["A", "B", "C", "D", "E", "Settings*"], cx);
4265
4266        set_max_tabs(cx, Some(5));
4267        assert_item_labels(&pane, ["B", "C", "D", "E", "Settings*"], cx);
4268
4269        set_max_tabs(cx, Some(4));
4270        assert_item_labels(&pane, ["C", "D", "E", "Settings*"], cx);
4271
4272        pane.update_in(cx, |pane, window, cx| {
4273            let ix = pane.index_for_item_id(item_c.item_id()).unwrap();
4274            pane.pin_tab_at(ix, window, cx);
4275
4276            let ix = pane.index_for_item_id(item_d.item_id()).unwrap();
4277            pane.pin_tab_at(ix, window, cx);
4278        });
4279        assert_item_labels(&pane, ["C!", "D!", "E", "Settings*"], cx);
4280
4281        set_max_tabs(cx, Some(2));
4282        assert_item_labels(&pane, ["C!", "D!", "Settings*"], cx);
4283    }
4284
4285    #[gpui::test]
4286    async fn test_allow_pinning_dirty_item_at_max_tabs(cx: &mut TestAppContext) {
4287        init_test(cx);
4288        let fs = FakeFs::new(cx.executor());
4289
4290        let project = Project::test(fs, None, cx).await;
4291        let (workspace, cx) =
4292            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4293        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4294
4295        set_max_tabs(cx, Some(1));
4296        let item_a = add_labeled_item(&pane, "A", true, cx);
4297
4298        pane.update_in(cx, |pane, window, cx| {
4299            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4300            pane.pin_tab_at(ix, window, cx);
4301        });
4302        assert_item_labels(&pane, ["A*^!"], cx);
4303    }
4304
4305    #[gpui::test]
4306    async fn test_allow_pinning_non_dirty_item_at_max_tabs(cx: &mut TestAppContext) {
4307        init_test(cx);
4308        let fs = FakeFs::new(cx.executor());
4309
4310        let project = Project::test(fs, None, cx).await;
4311        let (workspace, cx) =
4312            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4313        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4314
4315        set_max_tabs(cx, Some(1));
4316        let item_a = add_labeled_item(&pane, "A", false, cx);
4317
4318        pane.update_in(cx, |pane, window, cx| {
4319            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4320            pane.pin_tab_at(ix, window, cx);
4321        });
4322        assert_item_labels(&pane, ["A*!"], cx);
4323    }
4324
4325    #[gpui::test]
4326    async fn test_pin_tabs_incrementally_at_max_capacity(cx: &mut TestAppContext) {
4327        init_test(cx);
4328        let fs = FakeFs::new(cx.executor());
4329
4330        let project = Project::test(fs, None, cx).await;
4331        let (workspace, cx) =
4332            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4333        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4334
4335        set_max_tabs(cx, Some(3));
4336
4337        let item_a = add_labeled_item(&pane, "A", false, cx);
4338        assert_item_labels(&pane, ["A*"], cx);
4339
4340        pane.update_in(cx, |pane, window, cx| {
4341            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4342            pane.pin_tab_at(ix, window, cx);
4343        });
4344        assert_item_labels(&pane, ["A*!"], cx);
4345
4346        let item_b = add_labeled_item(&pane, "B", false, cx);
4347        assert_item_labels(&pane, ["A!", "B*"], cx);
4348
4349        pane.update_in(cx, |pane, window, cx| {
4350            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
4351            pane.pin_tab_at(ix, window, cx);
4352        });
4353        assert_item_labels(&pane, ["A!", "B*!"], cx);
4354
4355        let item_c = add_labeled_item(&pane, "C", false, cx);
4356        assert_item_labels(&pane, ["A!", "B!", "C*"], cx);
4357
4358        pane.update_in(cx, |pane, window, cx| {
4359            let ix = pane.index_for_item_id(item_c.item_id()).unwrap();
4360            pane.pin_tab_at(ix, window, cx);
4361        });
4362        assert_item_labels(&pane, ["A!", "B!", "C*!"], cx);
4363    }
4364
4365    #[gpui::test]
4366    async fn test_pin_tabs_left_to_right_after_opening_at_max_capacity(cx: &mut TestAppContext) {
4367        init_test(cx);
4368        let fs = FakeFs::new(cx.executor());
4369
4370        let project = Project::test(fs, None, cx).await;
4371        let (workspace, cx) =
4372            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4373        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4374
4375        set_max_tabs(cx, Some(3));
4376
4377        let item_a = add_labeled_item(&pane, "A", false, cx);
4378        assert_item_labels(&pane, ["A*"], cx);
4379
4380        let item_b = add_labeled_item(&pane, "B", false, cx);
4381        assert_item_labels(&pane, ["A", "B*"], cx);
4382
4383        let item_c = add_labeled_item(&pane, "C", false, cx);
4384        assert_item_labels(&pane, ["A", "B", "C*"], cx);
4385
4386        pane.update_in(cx, |pane, window, cx| {
4387            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4388            pane.pin_tab_at(ix, window, cx);
4389        });
4390        assert_item_labels(&pane, ["A!", "B", "C*"], cx);
4391
4392        pane.update_in(cx, |pane, window, cx| {
4393            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
4394            pane.pin_tab_at(ix, window, cx);
4395        });
4396        assert_item_labels(&pane, ["A!", "B!", "C*"], cx);
4397
4398        pane.update_in(cx, |pane, window, cx| {
4399            let ix = pane.index_for_item_id(item_c.item_id()).unwrap();
4400            pane.pin_tab_at(ix, window, cx);
4401        });
4402        assert_item_labels(&pane, ["A!", "B!", "C*!"], cx);
4403    }
4404
4405    #[gpui::test]
4406    async fn test_pin_tabs_right_to_left_after_opening_at_max_capacity(cx: &mut TestAppContext) {
4407        init_test(cx);
4408        let fs = FakeFs::new(cx.executor());
4409
4410        let project = Project::test(fs, None, cx).await;
4411        let (workspace, cx) =
4412            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4413        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4414
4415        set_max_tabs(cx, Some(3));
4416
4417        let item_a = add_labeled_item(&pane, "A", false, cx);
4418        assert_item_labels(&pane, ["A*"], cx);
4419
4420        let item_b = add_labeled_item(&pane, "B", false, cx);
4421        assert_item_labels(&pane, ["A", "B*"], cx);
4422
4423        let item_c = add_labeled_item(&pane, "C", false, cx);
4424        assert_item_labels(&pane, ["A", "B", "C*"], cx);
4425
4426        pane.update_in(cx, |pane, window, cx| {
4427            let ix = pane.index_for_item_id(item_c.item_id()).unwrap();
4428            pane.pin_tab_at(ix, window, cx);
4429        });
4430        assert_item_labels(&pane, ["C*!", "A", "B"], cx);
4431
4432        pane.update_in(cx, |pane, window, cx| {
4433            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
4434            pane.pin_tab_at(ix, window, cx);
4435        });
4436        assert_item_labels(&pane, ["C*!", "B!", "A"], cx);
4437
4438        pane.update_in(cx, |pane, window, cx| {
4439            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4440            pane.pin_tab_at(ix, window, cx);
4441        });
4442        assert_item_labels(&pane, ["C*!", "B!", "A!"], cx);
4443    }
4444
4445    #[gpui::test]
4446    async fn test_pinned_tabs_never_closed_at_max_tabs(cx: &mut TestAppContext) {
4447        init_test(cx);
4448        let fs = FakeFs::new(cx.executor());
4449
4450        let project = Project::test(fs, None, cx).await;
4451        let (workspace, cx) =
4452            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4453        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4454
4455        let item_a = add_labeled_item(&pane, "A", false, cx);
4456        pane.update_in(cx, |pane, window, cx| {
4457            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4458            pane.pin_tab_at(ix, window, cx);
4459        });
4460
4461        let item_b = add_labeled_item(&pane, "B", false, cx);
4462        pane.update_in(cx, |pane, window, cx| {
4463            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
4464            pane.pin_tab_at(ix, window, cx);
4465        });
4466
4467        add_labeled_item(&pane, "C", false, cx);
4468        add_labeled_item(&pane, "D", false, cx);
4469        add_labeled_item(&pane, "E", false, cx);
4470        assert_item_labels(&pane, ["A!", "B!", "C", "D", "E*"], cx);
4471
4472        set_max_tabs(cx, Some(3));
4473        add_labeled_item(&pane, "F", false, cx);
4474        assert_item_labels(&pane, ["A!", "B!", "F*"], cx);
4475
4476        add_labeled_item(&pane, "G", false, cx);
4477        assert_item_labels(&pane, ["A!", "B!", "G*"], cx);
4478
4479        add_labeled_item(&pane, "H", false, cx);
4480        assert_item_labels(&pane, ["A!", "B!", "H*"], cx);
4481    }
4482
4483    #[gpui::test]
4484    async fn test_always_allows_one_unpinned_item_over_max_tabs_regardless_of_pinned_count(
4485        cx: &mut TestAppContext,
4486    ) {
4487        init_test(cx);
4488        let fs = FakeFs::new(cx.executor());
4489
4490        let project = Project::test(fs, None, cx).await;
4491        let (workspace, cx) =
4492            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4493        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4494
4495        set_max_tabs(cx, Some(3));
4496
4497        let item_a = add_labeled_item(&pane, "A", false, cx);
4498        pane.update_in(cx, |pane, window, cx| {
4499            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4500            pane.pin_tab_at(ix, window, cx);
4501        });
4502
4503        let item_b = add_labeled_item(&pane, "B", false, cx);
4504        pane.update_in(cx, |pane, window, cx| {
4505            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
4506            pane.pin_tab_at(ix, window, cx);
4507        });
4508
4509        let item_c = add_labeled_item(&pane, "C", false, cx);
4510        pane.update_in(cx, |pane, window, cx| {
4511            let ix = pane.index_for_item_id(item_c.item_id()).unwrap();
4512            pane.pin_tab_at(ix, window, cx);
4513        });
4514
4515        assert_item_labels(&pane, ["A!", "B!", "C*!"], cx);
4516
4517        let item_d = add_labeled_item(&pane, "D", false, cx);
4518        assert_item_labels(&pane, ["A!", "B!", "C!", "D*"], cx);
4519
4520        pane.update_in(cx, |pane, window, cx| {
4521            let ix = pane.index_for_item_id(item_d.item_id()).unwrap();
4522            pane.pin_tab_at(ix, window, cx);
4523        });
4524        assert_item_labels(&pane, ["A!", "B!", "C!", "D*!"], cx);
4525
4526        add_labeled_item(&pane, "E", false, cx);
4527        assert_item_labels(&pane, ["A!", "B!", "C!", "D!", "E*"], cx);
4528
4529        add_labeled_item(&pane, "F", false, cx);
4530        assert_item_labels(&pane, ["A!", "B!", "C!", "D!", "F*"], cx);
4531    }
4532
4533    #[gpui::test]
4534    async fn test_can_open_one_item_when_all_tabs_are_dirty_at_max(cx: &mut TestAppContext) {
4535        init_test(cx);
4536        let fs = FakeFs::new(cx.executor());
4537
4538        let project = Project::test(fs, None, cx).await;
4539        let (workspace, cx) =
4540            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4541        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4542
4543        set_max_tabs(cx, Some(3));
4544
4545        add_labeled_item(&pane, "A", true, cx);
4546        assert_item_labels(&pane, ["A*^"], cx);
4547
4548        add_labeled_item(&pane, "B", true, cx);
4549        assert_item_labels(&pane, ["A^", "B*^"], cx);
4550
4551        add_labeled_item(&pane, "C", true, cx);
4552        assert_item_labels(&pane, ["A^", "B^", "C*^"], cx);
4553
4554        add_labeled_item(&pane, "D", false, cx);
4555        assert_item_labels(&pane, ["A^", "B^", "C^", "D*"], cx);
4556
4557        add_labeled_item(&pane, "E", false, cx);
4558        assert_item_labels(&pane, ["A^", "B^", "C^", "E*"], cx);
4559
4560        add_labeled_item(&pane, "F", false, cx);
4561        assert_item_labels(&pane, ["A^", "B^", "C^", "F*"], cx);
4562
4563        add_labeled_item(&pane, "G", true, cx);
4564        assert_item_labels(&pane, ["A^", "B^", "C^", "G*^"], cx);
4565    }
4566
4567    #[gpui::test]
4568    async fn test_toggle_pin_tab(cx: &mut TestAppContext) {
4569        init_test(cx);
4570        let fs = FakeFs::new(cx.executor());
4571
4572        let project = Project::test(fs, None, cx).await;
4573        let (workspace, cx) =
4574            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4575        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4576
4577        set_labeled_items(&pane, ["A", "B*", "C"], cx);
4578        assert_item_labels(&pane, ["A", "B*", "C"], cx);
4579
4580        pane.update_in(cx, |pane, window, cx| {
4581            pane.toggle_pin_tab(&TogglePinTab, window, cx);
4582        });
4583        assert_item_labels(&pane, ["B*!", "A", "C"], cx);
4584
4585        pane.update_in(cx, |pane, window, cx| {
4586            pane.toggle_pin_tab(&TogglePinTab, window, cx);
4587        });
4588        assert_item_labels(&pane, ["B*", "A", "C"], cx);
4589    }
4590
4591    #[gpui::test]
4592    async fn test_unpin_all_tabs(cx: &mut TestAppContext) {
4593        init_test(cx);
4594        let fs = FakeFs::new(cx.executor());
4595
4596        let project = Project::test(fs, None, cx).await;
4597        let (workspace, cx) =
4598            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4599        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4600
4601        // Unpin all, in an empty pane
4602        pane.update_in(cx, |pane, window, cx| {
4603            pane.unpin_all_tabs(&UnpinAllTabs, window, cx);
4604        });
4605
4606        assert_item_labels(&pane, [], cx);
4607
4608        let item_a = add_labeled_item(&pane, "A", false, cx);
4609        let item_b = add_labeled_item(&pane, "B", false, cx);
4610        let item_c = add_labeled_item(&pane, "C", false, cx);
4611        assert_item_labels(&pane, ["A", "B", "C*"], cx);
4612
4613        // Unpin all, when no tabs are pinned
4614        pane.update_in(cx, |pane, window, cx| {
4615            pane.unpin_all_tabs(&UnpinAllTabs, window, cx);
4616        });
4617
4618        assert_item_labels(&pane, ["A", "B", "C*"], cx);
4619
4620        // Pin inactive tabs only
4621        pane.update_in(cx, |pane, window, cx| {
4622            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4623            pane.pin_tab_at(ix, window, cx);
4624
4625            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
4626            pane.pin_tab_at(ix, window, cx);
4627        });
4628        assert_item_labels(&pane, ["A!", "B!", "C*"], cx);
4629
4630        pane.update_in(cx, |pane, window, cx| {
4631            pane.unpin_all_tabs(&UnpinAllTabs, window, cx);
4632        });
4633
4634        assert_item_labels(&pane, ["A", "B", "C*"], cx);
4635
4636        // Pin all tabs
4637        pane.update_in(cx, |pane, window, cx| {
4638            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4639            pane.pin_tab_at(ix, window, cx);
4640
4641            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
4642            pane.pin_tab_at(ix, window, cx);
4643
4644            let ix = pane.index_for_item_id(item_c.item_id()).unwrap();
4645            pane.pin_tab_at(ix, window, cx);
4646        });
4647        assert_item_labels(&pane, ["A!", "B!", "C*!"], cx);
4648
4649        // Activate middle tab
4650        pane.update_in(cx, |pane, window, cx| {
4651            pane.activate_item(1, false, false, window, cx);
4652        });
4653        assert_item_labels(&pane, ["A!", "B*!", "C!"], cx);
4654
4655        pane.update_in(cx, |pane, window, cx| {
4656            pane.unpin_all_tabs(&UnpinAllTabs, window, cx);
4657        });
4658
4659        // Order has not changed
4660        assert_item_labels(&pane, ["A", "B*", "C"], cx);
4661    }
4662
4663    #[gpui::test]
4664    async fn test_pinning_active_tab_without_position_change_maintains_focus(
4665        cx: &mut TestAppContext,
4666    ) {
4667        init_test(cx);
4668        let fs = FakeFs::new(cx.executor());
4669
4670        let project = Project::test(fs, None, cx).await;
4671        let (workspace, cx) =
4672            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4673        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4674
4675        // Add A
4676        let item_a = add_labeled_item(&pane, "A", false, cx);
4677        assert_item_labels(&pane, ["A*"], cx);
4678
4679        // Add B
4680        add_labeled_item(&pane, "B", false, cx);
4681        assert_item_labels(&pane, ["A", "B*"], cx);
4682
4683        // Activate A again
4684        pane.update_in(cx, |pane, window, cx| {
4685            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4686            pane.activate_item(ix, true, true, window, cx);
4687        });
4688        assert_item_labels(&pane, ["A*", "B"], cx);
4689
4690        // Pin A - remains active
4691        pane.update_in(cx, |pane, window, cx| {
4692            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4693            pane.pin_tab_at(ix, window, cx);
4694        });
4695        assert_item_labels(&pane, ["A*!", "B"], cx);
4696
4697        // Unpin A - remain active
4698        pane.update_in(cx, |pane, window, cx| {
4699            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4700            pane.unpin_tab_at(ix, window, cx);
4701        });
4702        assert_item_labels(&pane, ["A*", "B"], cx);
4703    }
4704
4705    #[gpui::test]
4706    async fn test_pinning_active_tab_with_position_change_maintains_focus(cx: &mut TestAppContext) {
4707        init_test(cx);
4708        let fs = FakeFs::new(cx.executor());
4709
4710        let project = Project::test(fs, None, cx).await;
4711        let (workspace, cx) =
4712            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4713        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4714
4715        // Add A, B, C
4716        add_labeled_item(&pane, "A", false, cx);
4717        add_labeled_item(&pane, "B", false, cx);
4718        let item_c = add_labeled_item(&pane, "C", false, cx);
4719        assert_item_labels(&pane, ["A", "B", "C*"], cx);
4720
4721        // Pin C - moves to pinned area, remains active
4722        pane.update_in(cx, |pane, window, cx| {
4723            let ix = pane.index_for_item_id(item_c.item_id()).unwrap();
4724            pane.pin_tab_at(ix, window, cx);
4725        });
4726        assert_item_labels(&pane, ["C*!", "A", "B"], cx);
4727
4728        // Unpin C - moves after pinned area, remains active
4729        pane.update_in(cx, |pane, window, cx| {
4730            let ix = pane.index_for_item_id(item_c.item_id()).unwrap();
4731            pane.unpin_tab_at(ix, window, cx);
4732        });
4733        assert_item_labels(&pane, ["C*", "A", "B"], cx);
4734    }
4735
4736    #[gpui::test]
4737    async fn test_pinning_inactive_tab_without_position_change_preserves_existing_focus(
4738        cx: &mut TestAppContext,
4739    ) {
4740        init_test(cx);
4741        let fs = FakeFs::new(cx.executor());
4742
4743        let project = Project::test(fs, None, cx).await;
4744        let (workspace, cx) =
4745            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4746        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4747
4748        // Add A, B
4749        let item_a = add_labeled_item(&pane, "A", false, cx);
4750        add_labeled_item(&pane, "B", false, cx);
4751        assert_item_labels(&pane, ["A", "B*"], cx);
4752
4753        // Pin A - already in pinned area, B remains active
4754        pane.update_in(cx, |pane, window, cx| {
4755            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4756            pane.pin_tab_at(ix, window, cx);
4757        });
4758        assert_item_labels(&pane, ["A!", "B*"], cx);
4759
4760        // Unpin A - stays in place, B remains active
4761        pane.update_in(cx, |pane, window, cx| {
4762            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4763            pane.unpin_tab_at(ix, window, cx);
4764        });
4765        assert_item_labels(&pane, ["A", "B*"], cx);
4766    }
4767
4768    #[gpui::test]
4769    async fn test_pinning_inactive_tab_with_position_change_preserves_existing_focus(
4770        cx: &mut TestAppContext,
4771    ) {
4772        init_test(cx);
4773        let fs = FakeFs::new(cx.executor());
4774
4775        let project = Project::test(fs, None, cx).await;
4776        let (workspace, cx) =
4777            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4778        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4779
4780        // Add A, B, C
4781        add_labeled_item(&pane, "A", false, cx);
4782        let item_b = add_labeled_item(&pane, "B", false, cx);
4783        let item_c = add_labeled_item(&pane, "C", false, cx);
4784        assert_item_labels(&pane, ["A", "B", "C*"], cx);
4785
4786        // Activate B
4787        pane.update_in(cx, |pane, window, cx| {
4788            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
4789            pane.activate_item(ix, true, true, window, cx);
4790        });
4791        assert_item_labels(&pane, ["A", "B*", "C"], cx);
4792
4793        // Pin C - moves to pinned area, B remains active
4794        pane.update_in(cx, |pane, window, cx| {
4795            let ix = pane.index_for_item_id(item_c.item_id()).unwrap();
4796            pane.pin_tab_at(ix, window, cx);
4797        });
4798        assert_item_labels(&pane, ["C!", "A", "B*"], cx);
4799
4800        // Unpin C - moves after pinned area, B remains active
4801        pane.update_in(cx, |pane, window, cx| {
4802            let ix = pane.index_for_item_id(item_c.item_id()).unwrap();
4803            pane.unpin_tab_at(ix, window, cx);
4804        });
4805        assert_item_labels(&pane, ["C", "A", "B*"], cx);
4806    }
4807
4808    #[gpui::test]
4809    async fn test_drag_unpinned_tab_to_split_creates_pane_with_unpinned_tab(
4810        cx: &mut TestAppContext,
4811    ) {
4812        init_test(cx);
4813        let fs = FakeFs::new(cx.executor());
4814
4815        let project = Project::test(fs, None, cx).await;
4816        let (workspace, cx) =
4817            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4818        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4819
4820        // Add A, B. Pin B. Activate A
4821        let item_a = add_labeled_item(&pane_a, "A", false, cx);
4822        let item_b = add_labeled_item(&pane_a, "B", false, cx);
4823
4824        pane_a.update_in(cx, |pane, window, cx| {
4825            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
4826            pane.pin_tab_at(ix, window, cx);
4827
4828            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4829            pane.activate_item(ix, true, true, window, cx);
4830        });
4831
4832        // Drag A to create new split
4833        pane_a.update_in(cx, |pane, window, cx| {
4834            pane.drag_split_direction = Some(SplitDirection::Right);
4835
4836            let dragged_tab = DraggedTab {
4837                pane: pane_a.clone(),
4838                item: item_a.boxed_clone(),
4839                ix: 0,
4840                detail: 0,
4841                is_active: true,
4842            };
4843            pane.handle_tab_drop(&dragged_tab, 0, window, cx);
4844        });
4845
4846        // A should be moved to new pane. B should remain pinned, A should not be pinned
4847        let (pane_a, pane_b) = workspace.read_with(cx, |workspace, _| {
4848            let panes = workspace.panes();
4849            (panes[0].clone(), panes[1].clone())
4850        });
4851        assert_item_labels(&pane_a, ["B*!"], cx);
4852        assert_item_labels(&pane_b, ["A*"], cx);
4853    }
4854
4855    #[gpui::test]
4856    async fn test_drag_pinned_tab_to_split_creates_pane_with_pinned_tab(cx: &mut TestAppContext) {
4857        init_test(cx);
4858        let fs = FakeFs::new(cx.executor());
4859
4860        let project = Project::test(fs, None, cx).await;
4861        let (workspace, cx) =
4862            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4863        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4864
4865        // Add A, B. Pin both. Activate A
4866        let item_a = add_labeled_item(&pane_a, "A", false, cx);
4867        let item_b = add_labeled_item(&pane_a, "B", false, cx);
4868
4869        pane_a.update_in(cx, |pane, window, cx| {
4870            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4871            pane.pin_tab_at(ix, window, cx);
4872
4873            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
4874            pane.pin_tab_at(ix, window, cx);
4875
4876            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4877            pane.activate_item(ix, true, true, window, cx);
4878        });
4879        assert_item_labels(&pane_a, ["A*!", "B!"], cx);
4880
4881        // Drag A to create new split
4882        pane_a.update_in(cx, |pane, window, cx| {
4883            pane.drag_split_direction = Some(SplitDirection::Right);
4884
4885            let dragged_tab = DraggedTab {
4886                pane: pane_a.clone(),
4887                item: item_a.boxed_clone(),
4888                ix: 0,
4889                detail: 0,
4890                is_active: true,
4891            };
4892            pane.handle_tab_drop(&dragged_tab, 0, window, cx);
4893        });
4894
4895        // A should be moved to new pane. Both A and B should still be pinned
4896        let (pane_a, pane_b) = workspace.read_with(cx, |workspace, _| {
4897            let panes = workspace.panes();
4898            (panes[0].clone(), panes[1].clone())
4899        });
4900        assert_item_labels(&pane_a, ["B*!"], cx);
4901        assert_item_labels(&pane_b, ["A*!"], cx);
4902    }
4903
4904    #[gpui::test]
4905    async fn test_drag_pinned_tab_into_existing_panes_pinned_region(cx: &mut TestAppContext) {
4906        init_test(cx);
4907        let fs = FakeFs::new(cx.executor());
4908
4909        let project = Project::test(fs, None, cx).await;
4910        let (workspace, cx) =
4911            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4912        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4913
4914        // Add A to pane A and pin
4915        let item_a = add_labeled_item(&pane_a, "A", false, cx);
4916        pane_a.update_in(cx, |pane, window, cx| {
4917            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4918            pane.pin_tab_at(ix, window, cx);
4919        });
4920        assert_item_labels(&pane_a, ["A*!"], cx);
4921
4922        // Add B to pane B and pin
4923        let pane_b = workspace.update_in(cx, |workspace, window, cx| {
4924            workspace.split_pane(pane_a.clone(), SplitDirection::Right, window, cx)
4925        });
4926        let item_b = add_labeled_item(&pane_b, "B", false, cx);
4927        pane_b.update_in(cx, |pane, window, cx| {
4928            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
4929            pane.pin_tab_at(ix, window, cx);
4930        });
4931        assert_item_labels(&pane_b, ["B*!"], cx);
4932
4933        // Move A from pane A to pane B's pinned region
4934        pane_b.update_in(cx, |pane, window, cx| {
4935            let dragged_tab = DraggedTab {
4936                pane: pane_a.clone(),
4937                item: item_a.boxed_clone(),
4938                ix: 0,
4939                detail: 0,
4940                is_active: true,
4941            };
4942            pane.handle_tab_drop(&dragged_tab, 0, window, cx);
4943        });
4944
4945        // A should stay pinned
4946        assert_item_labels(&pane_a, [], cx);
4947        assert_item_labels(&pane_b, ["A*!", "B!"], cx);
4948    }
4949
4950    #[gpui::test]
4951    async fn test_drag_pinned_tab_into_existing_panes_unpinned_region(cx: &mut TestAppContext) {
4952        init_test(cx);
4953        let fs = FakeFs::new(cx.executor());
4954
4955        let project = Project::test(fs, None, cx).await;
4956        let (workspace, cx) =
4957            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
4958        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
4959
4960        // Add A to pane A and pin
4961        let item_a = add_labeled_item(&pane_a, "A", false, cx);
4962        pane_a.update_in(cx, |pane, window, cx| {
4963            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
4964            pane.pin_tab_at(ix, window, cx);
4965        });
4966        assert_item_labels(&pane_a, ["A*!"], cx);
4967
4968        // Create pane B with pinned item B
4969        let pane_b = workspace.update_in(cx, |workspace, window, cx| {
4970            workspace.split_pane(pane_a.clone(), SplitDirection::Right, window, cx)
4971        });
4972        let item_b = add_labeled_item(&pane_b, "B", false, cx);
4973        assert_item_labels(&pane_b, ["B*"], cx);
4974
4975        pane_b.update_in(cx, |pane, window, cx| {
4976            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
4977            pane.pin_tab_at(ix, window, cx);
4978        });
4979        assert_item_labels(&pane_b, ["B*!"], cx);
4980
4981        // Move A from pane A to pane B's unpinned region
4982        pane_b.update_in(cx, |pane, window, cx| {
4983            let dragged_tab = DraggedTab {
4984                pane: pane_a.clone(),
4985                item: item_a.boxed_clone(),
4986                ix: 0,
4987                detail: 0,
4988                is_active: true,
4989            };
4990            pane.handle_tab_drop(&dragged_tab, 1, window, cx);
4991        });
4992
4993        // A should become pinned
4994        assert_item_labels(&pane_a, [], cx);
4995        assert_item_labels(&pane_b, ["B!", "A*"], cx);
4996    }
4997
4998    #[gpui::test]
4999    async fn test_drag_pinned_tab_into_existing_panes_first_position_with_no_pinned_tabs(
5000        cx: &mut TestAppContext,
5001    ) {
5002        init_test(cx);
5003        let fs = FakeFs::new(cx.executor());
5004
5005        let project = Project::test(fs, None, cx).await;
5006        let (workspace, cx) =
5007            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5008        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5009
5010        // Add A to pane A and pin
5011        let item_a = add_labeled_item(&pane_a, "A", false, cx);
5012        pane_a.update_in(cx, |pane, window, cx| {
5013            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
5014            pane.pin_tab_at(ix, window, cx);
5015        });
5016        assert_item_labels(&pane_a, ["A*!"], cx);
5017
5018        // Add B to pane B
5019        let pane_b = workspace.update_in(cx, |workspace, window, cx| {
5020            workspace.split_pane(pane_a.clone(), SplitDirection::Right, window, cx)
5021        });
5022        add_labeled_item(&pane_b, "B", false, cx);
5023        assert_item_labels(&pane_b, ["B*"], cx);
5024
5025        // Move A from pane A to position 0 in pane B, indicating it should stay pinned
5026        pane_b.update_in(cx, |pane, window, cx| {
5027            let dragged_tab = DraggedTab {
5028                pane: pane_a.clone(),
5029                item: item_a.boxed_clone(),
5030                ix: 0,
5031                detail: 0,
5032                is_active: true,
5033            };
5034            pane.handle_tab_drop(&dragged_tab, 0, window, cx);
5035        });
5036
5037        // A should stay pinned
5038        assert_item_labels(&pane_a, [], cx);
5039        assert_item_labels(&pane_b, ["A*!", "B"], cx);
5040    }
5041
5042    #[gpui::test]
5043    async fn test_drag_pinned_tab_into_existing_pane_at_max_capacity_closes_unpinned_tabs(
5044        cx: &mut TestAppContext,
5045    ) {
5046        init_test(cx);
5047        let fs = FakeFs::new(cx.executor());
5048
5049        let project = Project::test(fs, None, cx).await;
5050        let (workspace, cx) =
5051            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5052        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5053        set_max_tabs(cx, Some(2));
5054
5055        // Add A, B to pane A. Pin both
5056        let item_a = add_labeled_item(&pane_a, "A", false, cx);
5057        let item_b = add_labeled_item(&pane_a, "B", false, cx);
5058        pane_a.update_in(cx, |pane, window, cx| {
5059            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
5060            pane.pin_tab_at(ix, window, cx);
5061
5062            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
5063            pane.pin_tab_at(ix, window, cx);
5064        });
5065        assert_item_labels(&pane_a, ["A!", "B*!"], cx);
5066
5067        // Add C, D to pane B. Pin both
5068        let pane_b = workspace.update_in(cx, |workspace, window, cx| {
5069            workspace.split_pane(pane_a.clone(), SplitDirection::Right, window, cx)
5070        });
5071        let item_c = add_labeled_item(&pane_b, "C", false, cx);
5072        let item_d = add_labeled_item(&pane_b, "D", false, cx);
5073        pane_b.update_in(cx, |pane, window, cx| {
5074            let ix = pane.index_for_item_id(item_c.item_id()).unwrap();
5075            pane.pin_tab_at(ix, window, cx);
5076
5077            let ix = pane.index_for_item_id(item_d.item_id()).unwrap();
5078            pane.pin_tab_at(ix, window, cx);
5079        });
5080        assert_item_labels(&pane_b, ["C!", "D*!"], cx);
5081
5082        // Add a third unpinned item to pane B (exceeds max tabs), but is allowed,
5083        // as we allow 1 tab over max if the others are pinned or dirty
5084        add_labeled_item(&pane_b, "E", false, cx);
5085        assert_item_labels(&pane_b, ["C!", "D!", "E*"], cx);
5086
5087        // Drag pinned A from pane A to position 0 in pane B
5088        pane_b.update_in(cx, |pane, window, cx| {
5089            let dragged_tab = DraggedTab {
5090                pane: pane_a.clone(),
5091                item: item_a.boxed_clone(),
5092                ix: 0,
5093                detail: 0,
5094                is_active: true,
5095            };
5096            pane.handle_tab_drop(&dragged_tab, 0, window, cx);
5097        });
5098
5099        // E (unpinned) should be closed, leaving 3 pinned items
5100        assert_item_labels(&pane_a, ["B*!"], cx);
5101        assert_item_labels(&pane_b, ["A*!", "C!", "D!"], cx);
5102    }
5103
5104    #[gpui::test]
5105    async fn test_drag_last_pinned_tab_to_same_position_stays_pinned(cx: &mut TestAppContext) {
5106        init_test(cx);
5107        let fs = FakeFs::new(cx.executor());
5108
5109        let project = Project::test(fs, None, cx).await;
5110        let (workspace, cx) =
5111            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5112        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5113
5114        // Add A to pane A and pin it
5115        let item_a = add_labeled_item(&pane_a, "A", false, cx);
5116        pane_a.update_in(cx, |pane, window, cx| {
5117            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
5118            pane.pin_tab_at(ix, window, cx);
5119        });
5120        assert_item_labels(&pane_a, ["A*!"], cx);
5121
5122        // Drag pinned A to position 1 (directly to the right) in the same pane
5123        pane_a.update_in(cx, |pane, window, cx| {
5124            let dragged_tab = DraggedTab {
5125                pane: pane_a.clone(),
5126                item: item_a.boxed_clone(),
5127                ix: 0,
5128                detail: 0,
5129                is_active: true,
5130            };
5131            pane.handle_tab_drop(&dragged_tab, 1, window, cx);
5132        });
5133
5134        // A should still be pinned and active
5135        assert_item_labels(&pane_a, ["A*!"], cx);
5136    }
5137
5138    #[gpui::test]
5139    async fn test_drag_pinned_tab_beyond_last_pinned_tab_in_same_pane_stays_pinned(
5140        cx: &mut TestAppContext,
5141    ) {
5142        init_test(cx);
5143        let fs = FakeFs::new(cx.executor());
5144
5145        let project = Project::test(fs, None, cx).await;
5146        let (workspace, cx) =
5147            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5148        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5149
5150        // Add A, B to pane A and pin both
5151        let item_a = add_labeled_item(&pane_a, "A", false, cx);
5152        let item_b = add_labeled_item(&pane_a, "B", false, cx);
5153        pane_a.update_in(cx, |pane, window, cx| {
5154            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
5155            pane.pin_tab_at(ix, window, cx);
5156
5157            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
5158            pane.pin_tab_at(ix, window, cx);
5159        });
5160        assert_item_labels(&pane_a, ["A!", "B*!"], cx);
5161
5162        // Drag pinned A right of B in the same pane
5163        pane_a.update_in(cx, |pane, window, cx| {
5164            let dragged_tab = DraggedTab {
5165                pane: pane_a.clone(),
5166                item: item_a.boxed_clone(),
5167                ix: 0,
5168                detail: 0,
5169                is_active: true,
5170            };
5171            pane.handle_tab_drop(&dragged_tab, 2, window, cx);
5172        });
5173
5174        // A stays pinned
5175        assert_item_labels(&pane_a, ["B!", "A*!"], cx);
5176    }
5177
5178    #[gpui::test]
5179    async fn test_dragging_pinned_tab_onto_unpinned_tab_reduces_unpinned_tab_count(
5180        cx: &mut TestAppContext,
5181    ) {
5182        init_test(cx);
5183        let fs = FakeFs::new(cx.executor());
5184
5185        let project = Project::test(fs, None, cx).await;
5186        let (workspace, cx) =
5187            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5188        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5189
5190        // Add A, B to pane A and pin A
5191        let item_a = add_labeled_item(&pane_a, "A", false, cx);
5192        add_labeled_item(&pane_a, "B", false, cx);
5193        pane_a.update_in(cx, |pane, window, cx| {
5194            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
5195            pane.pin_tab_at(ix, window, cx);
5196        });
5197        assert_item_labels(&pane_a, ["A!", "B*"], cx);
5198
5199        // Drag pinned A on top of B in the same pane, which changes tab order to B, A
5200        pane_a.update_in(cx, |pane, window, cx| {
5201            let dragged_tab = DraggedTab {
5202                pane: pane_a.clone(),
5203                item: item_a.boxed_clone(),
5204                ix: 0,
5205                detail: 0,
5206                is_active: true,
5207            };
5208            pane.handle_tab_drop(&dragged_tab, 1, window, cx);
5209        });
5210
5211        // Neither are pinned
5212        assert_item_labels(&pane_a, ["B", "A*"], cx);
5213    }
5214
5215    #[gpui::test]
5216    async fn test_drag_pinned_tab_beyond_unpinned_tab_in_same_pane_becomes_unpinned(
5217        cx: &mut TestAppContext,
5218    ) {
5219        init_test(cx);
5220        let fs = FakeFs::new(cx.executor());
5221
5222        let project = Project::test(fs, None, cx).await;
5223        let (workspace, cx) =
5224            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5225        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5226
5227        // Add A, B to pane A and pin A
5228        let item_a = add_labeled_item(&pane_a, "A", false, cx);
5229        add_labeled_item(&pane_a, "B", false, cx);
5230        pane_a.update_in(cx, |pane, window, cx| {
5231            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
5232            pane.pin_tab_at(ix, window, cx);
5233        });
5234        assert_item_labels(&pane_a, ["A!", "B*"], cx);
5235
5236        // Drag pinned A right of B in the same pane
5237        pane_a.update_in(cx, |pane, window, cx| {
5238            let dragged_tab = DraggedTab {
5239                pane: pane_a.clone(),
5240                item: item_a.boxed_clone(),
5241                ix: 0,
5242                detail: 0,
5243                is_active: true,
5244            };
5245            pane.handle_tab_drop(&dragged_tab, 2, window, cx);
5246        });
5247
5248        // A becomes unpinned
5249        assert_item_labels(&pane_a, ["B", "A*"], cx);
5250    }
5251
5252    #[gpui::test]
5253    async fn test_drag_unpinned_tab_in_front_of_pinned_tab_in_same_pane_becomes_pinned(
5254        cx: &mut TestAppContext,
5255    ) {
5256        init_test(cx);
5257        let fs = FakeFs::new(cx.executor());
5258
5259        let project = Project::test(fs, None, cx).await;
5260        let (workspace, cx) =
5261            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5262        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5263
5264        // Add A, B to pane A and pin A
5265        let item_a = add_labeled_item(&pane_a, "A", false, cx);
5266        let item_b = add_labeled_item(&pane_a, "B", false, cx);
5267        pane_a.update_in(cx, |pane, window, cx| {
5268            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
5269            pane.pin_tab_at(ix, window, cx);
5270        });
5271        assert_item_labels(&pane_a, ["A!", "B*"], cx);
5272
5273        // Drag pinned B left of A in the same pane
5274        pane_a.update_in(cx, |pane, window, cx| {
5275            let dragged_tab = DraggedTab {
5276                pane: pane_a.clone(),
5277                item: item_b.boxed_clone(),
5278                ix: 1,
5279                detail: 0,
5280                is_active: true,
5281            };
5282            pane.handle_tab_drop(&dragged_tab, 0, window, cx);
5283        });
5284
5285        // A becomes unpinned
5286        assert_item_labels(&pane_a, ["B*!", "A!"], cx);
5287    }
5288
5289    #[gpui::test]
5290    async fn test_drag_unpinned_tab_to_the_pinned_region_stays_pinned(cx: &mut TestAppContext) {
5291        init_test(cx);
5292        let fs = FakeFs::new(cx.executor());
5293
5294        let project = Project::test(fs, None, cx).await;
5295        let (workspace, cx) =
5296            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5297        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5298
5299        // Add A, B, C to pane A and pin A
5300        let item_a = add_labeled_item(&pane_a, "A", false, cx);
5301        add_labeled_item(&pane_a, "B", false, cx);
5302        let item_c = add_labeled_item(&pane_a, "C", false, cx);
5303        pane_a.update_in(cx, |pane, window, cx| {
5304            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
5305            pane.pin_tab_at(ix, window, cx);
5306        });
5307        assert_item_labels(&pane_a, ["A!", "B", "C*"], cx);
5308
5309        // Drag pinned C left of B in the same pane
5310        pane_a.update_in(cx, |pane, window, cx| {
5311            let dragged_tab = DraggedTab {
5312                pane: pane_a.clone(),
5313                item: item_c.boxed_clone(),
5314                ix: 2,
5315                detail: 0,
5316                is_active: true,
5317            };
5318            pane.handle_tab_drop(&dragged_tab, 1, window, cx);
5319        });
5320
5321        // A stays pinned, B and C remain unpinned
5322        assert_item_labels(&pane_a, ["A!", "C*", "B"], cx);
5323    }
5324
5325    #[gpui::test]
5326    async fn test_drag_unpinned_tab_into_existing_panes_pinned_region(cx: &mut TestAppContext) {
5327        init_test(cx);
5328        let fs = FakeFs::new(cx.executor());
5329
5330        let project = Project::test(fs, None, cx).await;
5331        let (workspace, cx) =
5332            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5333        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5334
5335        // Add unpinned item A to pane A
5336        let item_a = add_labeled_item(&pane_a, "A", false, cx);
5337        assert_item_labels(&pane_a, ["A*"], cx);
5338
5339        // Create pane B with pinned item B
5340        let pane_b = workspace.update_in(cx, |workspace, window, cx| {
5341            workspace.split_pane(pane_a.clone(), SplitDirection::Right, window, cx)
5342        });
5343        let item_b = add_labeled_item(&pane_b, "B", false, cx);
5344        pane_b.update_in(cx, |pane, window, cx| {
5345            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
5346            pane.pin_tab_at(ix, window, cx);
5347        });
5348        assert_item_labels(&pane_b, ["B*!"], cx);
5349
5350        // Move A from pane A to pane B's pinned region
5351        pane_b.update_in(cx, |pane, window, cx| {
5352            let dragged_tab = DraggedTab {
5353                pane: pane_a.clone(),
5354                item: item_a.boxed_clone(),
5355                ix: 0,
5356                detail: 0,
5357                is_active: true,
5358            };
5359            pane.handle_tab_drop(&dragged_tab, 0, window, cx);
5360        });
5361
5362        // A should become pinned since it was dropped in the pinned region
5363        assert_item_labels(&pane_a, [], cx);
5364        assert_item_labels(&pane_b, ["A*!", "B!"], cx);
5365    }
5366
5367    #[gpui::test]
5368    async fn test_drag_unpinned_tab_into_existing_panes_unpinned_region(cx: &mut TestAppContext) {
5369        init_test(cx);
5370        let fs = FakeFs::new(cx.executor());
5371
5372        let project = Project::test(fs, None, cx).await;
5373        let (workspace, cx) =
5374            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5375        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5376
5377        // Add unpinned item A to pane A
5378        let item_a = add_labeled_item(&pane_a, "A", false, cx);
5379        assert_item_labels(&pane_a, ["A*"], cx);
5380
5381        // Create pane B with one pinned item B
5382        let pane_b = workspace.update_in(cx, |workspace, window, cx| {
5383            workspace.split_pane(pane_a.clone(), SplitDirection::Right, window, cx)
5384        });
5385        let item_b = add_labeled_item(&pane_b, "B", false, cx);
5386        pane_b.update_in(cx, |pane, window, cx| {
5387            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
5388            pane.pin_tab_at(ix, window, cx);
5389        });
5390        assert_item_labels(&pane_b, ["B*!"], cx);
5391
5392        // Move A from pane A to pane B's unpinned region
5393        pane_b.update_in(cx, |pane, window, cx| {
5394            let dragged_tab = DraggedTab {
5395                pane: pane_a.clone(),
5396                item: item_a.boxed_clone(),
5397                ix: 0,
5398                detail: 0,
5399                is_active: true,
5400            };
5401            pane.handle_tab_drop(&dragged_tab, 1, window, cx);
5402        });
5403
5404        // A should remain unpinned since it was dropped outside the pinned region
5405        assert_item_labels(&pane_a, [], cx);
5406        assert_item_labels(&pane_b, ["B!", "A*"], cx);
5407    }
5408
5409    #[gpui::test]
5410    async fn test_drag_pinned_tab_throughout_entire_range_of_pinned_tabs_both_directions(
5411        cx: &mut TestAppContext,
5412    ) {
5413        init_test(cx);
5414        let fs = FakeFs::new(cx.executor());
5415
5416        let project = Project::test(fs, None, cx).await;
5417        let (workspace, cx) =
5418            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5419        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5420
5421        // Add A, B, C and pin all
5422        let item_a = add_labeled_item(&pane_a, "A", false, cx);
5423        let item_b = add_labeled_item(&pane_a, "B", false, cx);
5424        let item_c = add_labeled_item(&pane_a, "C", false, cx);
5425        assert_item_labels(&pane_a, ["A", "B", "C*"], cx);
5426
5427        pane_a.update_in(cx, |pane, window, cx| {
5428            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
5429            pane.pin_tab_at(ix, window, cx);
5430
5431            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
5432            pane.pin_tab_at(ix, window, cx);
5433
5434            let ix = pane.index_for_item_id(item_c.item_id()).unwrap();
5435            pane.pin_tab_at(ix, window, cx);
5436        });
5437        assert_item_labels(&pane_a, ["A!", "B!", "C*!"], cx);
5438
5439        // Move A to right of B
5440        pane_a.update_in(cx, |pane, window, cx| {
5441            let dragged_tab = DraggedTab {
5442                pane: pane_a.clone(),
5443                item: item_a.boxed_clone(),
5444                ix: 0,
5445                detail: 0,
5446                is_active: true,
5447            };
5448            pane.handle_tab_drop(&dragged_tab, 1, window, cx);
5449        });
5450
5451        // A should be after B and all are pinned
5452        assert_item_labels(&pane_a, ["B!", "A*!", "C!"], cx);
5453
5454        // Move A to right of C
5455        pane_a.update_in(cx, |pane, window, cx| {
5456            let dragged_tab = DraggedTab {
5457                pane: pane_a.clone(),
5458                item: item_a.boxed_clone(),
5459                ix: 1,
5460                detail: 0,
5461                is_active: true,
5462            };
5463            pane.handle_tab_drop(&dragged_tab, 2, window, cx);
5464        });
5465
5466        // A should be after C and all are pinned
5467        assert_item_labels(&pane_a, ["B!", "C!", "A*!"], cx);
5468
5469        // Move A to left of C
5470        pane_a.update_in(cx, |pane, window, cx| {
5471            let dragged_tab = DraggedTab {
5472                pane: pane_a.clone(),
5473                item: item_a.boxed_clone(),
5474                ix: 2,
5475                detail: 0,
5476                is_active: true,
5477            };
5478            pane.handle_tab_drop(&dragged_tab, 1, window, cx);
5479        });
5480
5481        // A should be before C and all are pinned
5482        assert_item_labels(&pane_a, ["B!", "A*!", "C!"], cx);
5483
5484        // Move A to left of B
5485        pane_a.update_in(cx, |pane, window, cx| {
5486            let dragged_tab = DraggedTab {
5487                pane: pane_a.clone(),
5488                item: item_a.boxed_clone(),
5489                ix: 1,
5490                detail: 0,
5491                is_active: true,
5492            };
5493            pane.handle_tab_drop(&dragged_tab, 0, window, cx);
5494        });
5495
5496        // A should be before B and all are pinned
5497        assert_item_labels(&pane_a, ["A*!", "B!", "C!"], cx);
5498    }
5499
5500    #[gpui::test]
5501    async fn test_drag_first_tab_to_last_position(cx: &mut TestAppContext) {
5502        init_test(cx);
5503        let fs = FakeFs::new(cx.executor());
5504
5505        let project = Project::test(fs, None, cx).await;
5506        let (workspace, cx) =
5507            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5508        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5509
5510        // Add A, B, C
5511        let item_a = add_labeled_item(&pane_a, "A", false, cx);
5512        add_labeled_item(&pane_a, "B", false, cx);
5513        add_labeled_item(&pane_a, "C", false, cx);
5514        assert_item_labels(&pane_a, ["A", "B", "C*"], cx);
5515
5516        // Move A to the end
5517        pane_a.update_in(cx, |pane, window, cx| {
5518            let dragged_tab = DraggedTab {
5519                pane: pane_a.clone(),
5520                item: item_a.boxed_clone(),
5521                ix: 0,
5522                detail: 0,
5523                is_active: true,
5524            };
5525            pane.handle_tab_drop(&dragged_tab, 2, window, cx);
5526        });
5527
5528        // A should be at the end
5529        assert_item_labels(&pane_a, ["B", "C", "A*"], cx);
5530    }
5531
5532    #[gpui::test]
5533    async fn test_drag_last_tab_to_first_position(cx: &mut TestAppContext) {
5534        init_test(cx);
5535        let fs = FakeFs::new(cx.executor());
5536
5537        let project = Project::test(fs, None, cx).await;
5538        let (workspace, cx) =
5539            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5540        let pane_a = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5541
5542        // Add A, B, C
5543        add_labeled_item(&pane_a, "A", false, cx);
5544        add_labeled_item(&pane_a, "B", false, cx);
5545        let item_c = add_labeled_item(&pane_a, "C", false, cx);
5546        assert_item_labels(&pane_a, ["A", "B", "C*"], cx);
5547
5548        // Move C to the beginning
5549        pane_a.update_in(cx, |pane, window, cx| {
5550            let dragged_tab = DraggedTab {
5551                pane: pane_a.clone(),
5552                item: item_c.boxed_clone(),
5553                ix: 2,
5554                detail: 0,
5555                is_active: true,
5556            };
5557            pane.handle_tab_drop(&dragged_tab, 0, window, cx);
5558        });
5559
5560        // C should be at the beginning
5561        assert_item_labels(&pane_a, ["C*", "A", "B"], cx);
5562    }
5563
5564    #[gpui::test]
5565    async fn test_add_item_with_new_item(cx: &mut TestAppContext) {
5566        init_test(cx);
5567        let fs = FakeFs::new(cx.executor());
5568
5569        let project = Project::test(fs, None, cx).await;
5570        let (workspace, cx) =
5571            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5572        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5573
5574        // 1. Add with a destination index
5575        //   a. Add before the active item
5576        set_labeled_items(&pane, ["A", "B*", "C"], cx);
5577        pane.update_in(cx, |pane, window, cx| {
5578            pane.add_item(
5579                Box::new(cx.new(|cx| TestItem::new(cx).with_label("D"))),
5580                false,
5581                false,
5582                Some(0),
5583                window,
5584                cx,
5585            );
5586        });
5587        assert_item_labels(&pane, ["D*", "A", "B", "C"], cx);
5588
5589        //   b. Add after the active item
5590        set_labeled_items(&pane, ["A", "B*", "C"], cx);
5591        pane.update_in(cx, |pane, window, cx| {
5592            pane.add_item(
5593                Box::new(cx.new(|cx| TestItem::new(cx).with_label("D"))),
5594                false,
5595                false,
5596                Some(2),
5597                window,
5598                cx,
5599            );
5600        });
5601        assert_item_labels(&pane, ["A", "B", "D*", "C"], cx);
5602
5603        //   c. Add at the end of the item list (including off the length)
5604        set_labeled_items(&pane, ["A", "B*", "C"], cx);
5605        pane.update_in(cx, |pane, window, cx| {
5606            pane.add_item(
5607                Box::new(cx.new(|cx| TestItem::new(cx).with_label("D"))),
5608                false,
5609                false,
5610                Some(5),
5611                window,
5612                cx,
5613            );
5614        });
5615        assert_item_labels(&pane, ["A", "B", "C", "D*"], cx);
5616
5617        // 2. Add without a destination index
5618        //   a. Add with active item at the start of the item list
5619        set_labeled_items(&pane, ["A*", "B", "C"], cx);
5620        pane.update_in(cx, |pane, window, cx| {
5621            pane.add_item(
5622                Box::new(cx.new(|cx| TestItem::new(cx).with_label("D"))),
5623                false,
5624                false,
5625                None,
5626                window,
5627                cx,
5628            );
5629        });
5630        set_labeled_items(&pane, ["A", "D*", "B", "C"], cx);
5631
5632        //   b. Add with active item at the end of the item list
5633        set_labeled_items(&pane, ["A", "B", "C*"], cx);
5634        pane.update_in(cx, |pane, window, cx| {
5635            pane.add_item(
5636                Box::new(cx.new(|cx| TestItem::new(cx).with_label("D"))),
5637                false,
5638                false,
5639                None,
5640                window,
5641                cx,
5642            );
5643        });
5644        assert_item_labels(&pane, ["A", "B", "C", "D*"], cx);
5645    }
5646
5647    #[gpui::test]
5648    async fn test_add_item_with_existing_item(cx: &mut TestAppContext) {
5649        init_test(cx);
5650        let fs = FakeFs::new(cx.executor());
5651
5652        let project = Project::test(fs, None, cx).await;
5653        let (workspace, cx) =
5654            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5655        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5656
5657        // 1. Add with a destination index
5658        //   1a. Add before the active item
5659        let [_, _, _, d] = set_labeled_items(&pane, ["A", "B*", "C", "D"], cx);
5660        pane.update_in(cx, |pane, window, cx| {
5661            pane.add_item(d, false, false, Some(0), window, cx);
5662        });
5663        assert_item_labels(&pane, ["D*", "A", "B", "C"], cx);
5664
5665        //   1b. Add after the active item
5666        let [_, _, _, d] = set_labeled_items(&pane, ["A", "B*", "C", "D"], cx);
5667        pane.update_in(cx, |pane, window, cx| {
5668            pane.add_item(d, false, false, Some(2), window, cx);
5669        });
5670        assert_item_labels(&pane, ["A", "B", "D*", "C"], cx);
5671
5672        //   1c. Add at the end of the item list (including off the length)
5673        let [a, _, _, _] = set_labeled_items(&pane, ["A", "B*", "C", "D"], cx);
5674        pane.update_in(cx, |pane, window, cx| {
5675            pane.add_item(a, false, false, Some(5), window, cx);
5676        });
5677        assert_item_labels(&pane, ["B", "C", "D", "A*"], cx);
5678
5679        //   1d. Add same item to active index
5680        let [_, b, _] = set_labeled_items(&pane, ["A", "B*", "C"], cx);
5681        pane.update_in(cx, |pane, window, cx| {
5682            pane.add_item(b, false, false, Some(1), window, cx);
5683        });
5684        assert_item_labels(&pane, ["A", "B*", "C"], cx);
5685
5686        //   1e. Add item to index after same item in last position
5687        let [_, _, c] = set_labeled_items(&pane, ["A", "B*", "C"], cx);
5688        pane.update_in(cx, |pane, window, cx| {
5689            pane.add_item(c, false, false, Some(2), window, cx);
5690        });
5691        assert_item_labels(&pane, ["A", "B", "C*"], cx);
5692
5693        // 2. Add without a destination index
5694        //   2a. Add with active item at the start of the item list
5695        let [_, _, _, d] = set_labeled_items(&pane, ["A*", "B", "C", "D"], cx);
5696        pane.update_in(cx, |pane, window, cx| {
5697            pane.add_item(d, false, false, None, window, cx);
5698        });
5699        assert_item_labels(&pane, ["A", "D*", "B", "C"], cx);
5700
5701        //   2b. Add with active item at the end of the item list
5702        let [a, _, _, _] = set_labeled_items(&pane, ["A", "B", "C", "D*"], cx);
5703        pane.update_in(cx, |pane, window, cx| {
5704            pane.add_item(a, false, false, None, window, cx);
5705        });
5706        assert_item_labels(&pane, ["B", "C", "D", "A*"], cx);
5707
5708        //   2c. Add active item to active item at end of list
5709        let [_, _, c] = set_labeled_items(&pane, ["A", "B", "C*"], cx);
5710        pane.update_in(cx, |pane, window, cx| {
5711            pane.add_item(c, false, false, None, window, cx);
5712        });
5713        assert_item_labels(&pane, ["A", "B", "C*"], cx);
5714
5715        //   2d. Add active item to active item at start of list
5716        let [a, _, _] = set_labeled_items(&pane, ["A*", "B", "C"], cx);
5717        pane.update_in(cx, |pane, window, cx| {
5718            pane.add_item(a, false, false, None, window, cx);
5719        });
5720        assert_item_labels(&pane, ["A*", "B", "C"], cx);
5721    }
5722
5723    #[gpui::test]
5724    async fn test_add_item_with_same_project_entries(cx: &mut TestAppContext) {
5725        init_test(cx);
5726        let fs = FakeFs::new(cx.executor());
5727
5728        let project = Project::test(fs, None, cx).await;
5729        let (workspace, cx) =
5730            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5731        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5732
5733        // singleton view
5734        pane.update_in(cx, |pane, window, cx| {
5735            pane.add_item(
5736                Box::new(cx.new(|cx| {
5737                    TestItem::new(cx)
5738                        .with_buffer_kind(ItemBufferKind::Singleton)
5739                        .with_label("buffer 1")
5740                        .with_project_items(&[TestProjectItem::new(1, "one.txt", cx)])
5741                })),
5742                false,
5743                false,
5744                None,
5745                window,
5746                cx,
5747            );
5748        });
5749        assert_item_labels(&pane, ["buffer 1*"], cx);
5750
5751        // new singleton view with the same project entry
5752        pane.update_in(cx, |pane, window, cx| {
5753            pane.add_item(
5754                Box::new(cx.new(|cx| {
5755                    TestItem::new(cx)
5756                        .with_buffer_kind(ItemBufferKind::Singleton)
5757                        .with_label("buffer 1")
5758                        .with_project_items(&[TestProjectItem::new(1, "1.txt", cx)])
5759                })),
5760                false,
5761                false,
5762                None,
5763                window,
5764                cx,
5765            );
5766        });
5767        assert_item_labels(&pane, ["buffer 1*"], cx);
5768
5769        // new singleton view with different project entry
5770        pane.update_in(cx, |pane, window, cx| {
5771            pane.add_item(
5772                Box::new(cx.new(|cx| {
5773                    TestItem::new(cx)
5774                        .with_buffer_kind(ItemBufferKind::Singleton)
5775                        .with_label("buffer 2")
5776                        .with_project_items(&[TestProjectItem::new(2, "2.txt", cx)])
5777                })),
5778                false,
5779                false,
5780                None,
5781                window,
5782                cx,
5783            );
5784        });
5785        assert_item_labels(&pane, ["buffer 1", "buffer 2*"], cx);
5786
5787        // new multibuffer view with the same project entry
5788        pane.update_in(cx, |pane, window, cx| {
5789            pane.add_item(
5790                Box::new(cx.new(|cx| {
5791                    TestItem::new(cx)
5792                        .with_buffer_kind(ItemBufferKind::Multibuffer)
5793                        .with_label("multibuffer 1")
5794                        .with_project_items(&[TestProjectItem::new(1, "1.txt", cx)])
5795                })),
5796                false,
5797                false,
5798                None,
5799                window,
5800                cx,
5801            );
5802        });
5803        assert_item_labels(&pane, ["buffer 1", "buffer 2", "multibuffer 1*"], cx);
5804
5805        // another multibuffer view with the same project entry
5806        pane.update_in(cx, |pane, window, cx| {
5807            pane.add_item(
5808                Box::new(cx.new(|cx| {
5809                    TestItem::new(cx)
5810                        .with_buffer_kind(ItemBufferKind::Multibuffer)
5811                        .with_label("multibuffer 1b")
5812                        .with_project_items(&[TestProjectItem::new(1, "1.txt", cx)])
5813                })),
5814                false,
5815                false,
5816                None,
5817                window,
5818                cx,
5819            );
5820        });
5821        assert_item_labels(
5822            &pane,
5823            ["buffer 1", "buffer 2", "multibuffer 1", "multibuffer 1b*"],
5824            cx,
5825        );
5826    }
5827
5828    #[gpui::test]
5829    async fn test_remove_item_ordering_history(cx: &mut TestAppContext) {
5830        init_test(cx);
5831        let fs = FakeFs::new(cx.executor());
5832
5833        let project = Project::test(fs, None, cx).await;
5834        let (workspace, cx) =
5835            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5836        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5837
5838        add_labeled_item(&pane, "A", false, cx);
5839        add_labeled_item(&pane, "B", false, cx);
5840        add_labeled_item(&pane, "C", false, cx);
5841        add_labeled_item(&pane, "D", false, cx);
5842        assert_item_labels(&pane, ["A", "B", "C", "D*"], cx);
5843
5844        pane.update_in(cx, |pane, window, cx| {
5845            pane.activate_item(1, false, false, window, cx)
5846        });
5847        add_labeled_item(&pane, "1", false, cx);
5848        assert_item_labels(&pane, ["A", "B", "1*", "C", "D"], cx);
5849
5850        pane.update_in(cx, |pane, window, cx| {
5851            pane.close_active_item(
5852                &CloseActiveItem {
5853                    save_intent: None,
5854                    close_pinned: false,
5855                },
5856                window,
5857                cx,
5858            )
5859        })
5860        .await
5861        .unwrap();
5862        assert_item_labels(&pane, ["A", "B*", "C", "D"], cx);
5863
5864        pane.update_in(cx, |pane, window, cx| {
5865            pane.activate_item(3, false, false, window, cx)
5866        });
5867        assert_item_labels(&pane, ["A", "B", "C", "D*"], cx);
5868
5869        pane.update_in(cx, |pane, window, cx| {
5870            pane.close_active_item(
5871                &CloseActiveItem {
5872                    save_intent: None,
5873                    close_pinned: false,
5874                },
5875                window,
5876                cx,
5877            )
5878        })
5879        .await
5880        .unwrap();
5881        assert_item_labels(&pane, ["A", "B*", "C"], cx);
5882
5883        pane.update_in(cx, |pane, window, cx| {
5884            pane.close_active_item(
5885                &CloseActiveItem {
5886                    save_intent: None,
5887                    close_pinned: false,
5888                },
5889                window,
5890                cx,
5891            )
5892        })
5893        .await
5894        .unwrap();
5895        assert_item_labels(&pane, ["A", "C*"], cx);
5896
5897        pane.update_in(cx, |pane, window, cx| {
5898            pane.close_active_item(
5899                &CloseActiveItem {
5900                    save_intent: None,
5901                    close_pinned: false,
5902                },
5903                window,
5904                cx,
5905            )
5906        })
5907        .await
5908        .unwrap();
5909        assert_item_labels(&pane, ["A*"], cx);
5910    }
5911
5912    #[gpui::test]
5913    async fn test_remove_item_ordering_neighbour(cx: &mut TestAppContext) {
5914        init_test(cx);
5915        cx.update_global::<SettingsStore, ()>(|s, cx| {
5916            s.update_user_settings(cx, |s| {
5917                s.tabs.get_or_insert_default().activate_on_close = Some(ActivateOnClose::Neighbour);
5918            });
5919        });
5920        let fs = FakeFs::new(cx.executor());
5921
5922        let project = Project::test(fs, None, cx).await;
5923        let (workspace, cx) =
5924            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
5925        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
5926
5927        add_labeled_item(&pane, "A", false, cx);
5928        add_labeled_item(&pane, "B", false, cx);
5929        add_labeled_item(&pane, "C", false, cx);
5930        add_labeled_item(&pane, "D", false, cx);
5931        assert_item_labels(&pane, ["A", "B", "C", "D*"], cx);
5932
5933        pane.update_in(cx, |pane, window, cx| {
5934            pane.activate_item(1, false, false, window, cx)
5935        });
5936        add_labeled_item(&pane, "1", false, cx);
5937        assert_item_labels(&pane, ["A", "B", "1*", "C", "D"], cx);
5938
5939        pane.update_in(cx, |pane, window, cx| {
5940            pane.close_active_item(
5941                &CloseActiveItem {
5942                    save_intent: None,
5943                    close_pinned: false,
5944                },
5945                window,
5946                cx,
5947            )
5948        })
5949        .await
5950        .unwrap();
5951        assert_item_labels(&pane, ["A", "B", "C*", "D"], cx);
5952
5953        pane.update_in(cx, |pane, window, cx| {
5954            pane.activate_item(3, false, false, window, cx)
5955        });
5956        assert_item_labels(&pane, ["A", "B", "C", "D*"], cx);
5957
5958        pane.update_in(cx, |pane, window, cx| {
5959            pane.close_active_item(
5960                &CloseActiveItem {
5961                    save_intent: None,
5962                    close_pinned: false,
5963                },
5964                window,
5965                cx,
5966            )
5967        })
5968        .await
5969        .unwrap();
5970        assert_item_labels(&pane, ["A", "B", "C*"], cx);
5971
5972        pane.update_in(cx, |pane, window, cx| {
5973            pane.close_active_item(
5974                &CloseActiveItem {
5975                    save_intent: None,
5976                    close_pinned: false,
5977                },
5978                window,
5979                cx,
5980            )
5981        })
5982        .await
5983        .unwrap();
5984        assert_item_labels(&pane, ["A", "B*"], cx);
5985
5986        pane.update_in(cx, |pane, window, cx| {
5987            pane.close_active_item(
5988                &CloseActiveItem {
5989                    save_intent: None,
5990                    close_pinned: false,
5991                },
5992                window,
5993                cx,
5994            )
5995        })
5996        .await
5997        .unwrap();
5998        assert_item_labels(&pane, ["A*"], cx);
5999    }
6000
6001    #[gpui::test]
6002    async fn test_remove_item_ordering_left_neighbour(cx: &mut TestAppContext) {
6003        init_test(cx);
6004        cx.update_global::<SettingsStore, ()>(|s, cx| {
6005            s.update_user_settings(cx, |s| {
6006                s.tabs.get_or_insert_default().activate_on_close =
6007                    Some(ActivateOnClose::LeftNeighbour);
6008            });
6009        });
6010        let fs = FakeFs::new(cx.executor());
6011
6012        let project = Project::test(fs, None, cx).await;
6013        let (workspace, cx) =
6014            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
6015        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6016
6017        add_labeled_item(&pane, "A", false, cx);
6018        add_labeled_item(&pane, "B", false, cx);
6019        add_labeled_item(&pane, "C", false, cx);
6020        add_labeled_item(&pane, "D", false, cx);
6021        assert_item_labels(&pane, ["A", "B", "C", "D*"], cx);
6022
6023        pane.update_in(cx, |pane, window, cx| {
6024            pane.activate_item(1, false, false, window, cx)
6025        });
6026        add_labeled_item(&pane, "1", false, cx);
6027        assert_item_labels(&pane, ["A", "B", "1*", "C", "D"], cx);
6028
6029        pane.update_in(cx, |pane, window, cx| {
6030            pane.close_active_item(
6031                &CloseActiveItem {
6032                    save_intent: None,
6033                    close_pinned: false,
6034                },
6035                window,
6036                cx,
6037            )
6038        })
6039        .await
6040        .unwrap();
6041        assert_item_labels(&pane, ["A", "B*", "C", "D"], cx);
6042
6043        pane.update_in(cx, |pane, window, cx| {
6044            pane.activate_item(3, false, false, window, cx)
6045        });
6046        assert_item_labels(&pane, ["A", "B", "C", "D*"], cx);
6047
6048        pane.update_in(cx, |pane, window, cx| {
6049            pane.close_active_item(
6050                &CloseActiveItem {
6051                    save_intent: None,
6052                    close_pinned: false,
6053                },
6054                window,
6055                cx,
6056            )
6057        })
6058        .await
6059        .unwrap();
6060        assert_item_labels(&pane, ["A", "B", "C*"], cx);
6061
6062        pane.update_in(cx, |pane, window, cx| {
6063            pane.activate_item(0, false, false, window, cx)
6064        });
6065        assert_item_labels(&pane, ["A*", "B", "C"], cx);
6066
6067        pane.update_in(cx, |pane, window, cx| {
6068            pane.close_active_item(
6069                &CloseActiveItem {
6070                    save_intent: None,
6071                    close_pinned: false,
6072                },
6073                window,
6074                cx,
6075            )
6076        })
6077        .await
6078        .unwrap();
6079        assert_item_labels(&pane, ["B*", "C"], cx);
6080
6081        pane.update_in(cx, |pane, window, cx| {
6082            pane.close_active_item(
6083                &CloseActiveItem {
6084                    save_intent: None,
6085                    close_pinned: false,
6086                },
6087                window,
6088                cx,
6089            )
6090        })
6091        .await
6092        .unwrap();
6093        assert_item_labels(&pane, ["C*"], cx);
6094    }
6095
6096    #[gpui::test]
6097    async fn test_close_inactive_items(cx: &mut TestAppContext) {
6098        init_test(cx);
6099        let fs = FakeFs::new(cx.executor());
6100
6101        let project = Project::test(fs, None, cx).await;
6102        let (workspace, cx) =
6103            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
6104        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6105
6106        let item_a = add_labeled_item(&pane, "A", false, cx);
6107        pane.update_in(cx, |pane, window, cx| {
6108            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
6109            pane.pin_tab_at(ix, window, cx);
6110        });
6111        assert_item_labels(&pane, ["A*!"], cx);
6112
6113        let item_b = add_labeled_item(&pane, "B", false, cx);
6114        pane.update_in(cx, |pane, window, cx| {
6115            let ix = pane.index_for_item_id(item_b.item_id()).unwrap();
6116            pane.pin_tab_at(ix, window, cx);
6117        });
6118        assert_item_labels(&pane, ["A!", "B*!"], cx);
6119
6120        add_labeled_item(&pane, "C", false, cx);
6121        assert_item_labels(&pane, ["A!", "B!", "C*"], cx);
6122
6123        add_labeled_item(&pane, "D", false, cx);
6124        add_labeled_item(&pane, "E", false, cx);
6125        assert_item_labels(&pane, ["A!", "B!", "C", "D", "E*"], cx);
6126
6127        pane.update_in(cx, |pane, window, cx| {
6128            pane.close_other_items(
6129                &CloseOtherItems {
6130                    save_intent: None,
6131                    close_pinned: false,
6132                },
6133                None,
6134                window,
6135                cx,
6136            )
6137        })
6138        .await
6139        .unwrap();
6140        assert_item_labels(&pane, ["A!", "B!", "E*"], cx);
6141    }
6142
6143    #[gpui::test]
6144    async fn test_running_close_inactive_items_via_an_inactive_item(cx: &mut TestAppContext) {
6145        init_test(cx);
6146        let fs = FakeFs::new(cx.executor());
6147
6148        let project = Project::test(fs, None, cx).await;
6149        let (workspace, cx) =
6150            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
6151        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6152
6153        add_labeled_item(&pane, "A", false, cx);
6154        assert_item_labels(&pane, ["A*"], cx);
6155
6156        let item_b = add_labeled_item(&pane, "B", false, cx);
6157        assert_item_labels(&pane, ["A", "B*"], cx);
6158
6159        add_labeled_item(&pane, "C", false, cx);
6160        add_labeled_item(&pane, "D", false, cx);
6161        add_labeled_item(&pane, "E", false, cx);
6162        assert_item_labels(&pane, ["A", "B", "C", "D", "E*"], cx);
6163
6164        pane.update_in(cx, |pane, window, cx| {
6165            pane.close_other_items(
6166                &CloseOtherItems {
6167                    save_intent: None,
6168                    close_pinned: false,
6169                },
6170                Some(item_b.item_id()),
6171                window,
6172                cx,
6173            )
6174        })
6175        .await
6176        .unwrap();
6177        assert_item_labels(&pane, ["B*"], cx);
6178    }
6179
6180    #[gpui::test]
6181    async fn test_close_clean_items(cx: &mut TestAppContext) {
6182        init_test(cx);
6183        let fs = FakeFs::new(cx.executor());
6184
6185        let project = Project::test(fs, None, cx).await;
6186        let (workspace, cx) =
6187            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
6188        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6189
6190        add_labeled_item(&pane, "A", true, cx);
6191        add_labeled_item(&pane, "B", false, cx);
6192        add_labeled_item(&pane, "C", true, cx);
6193        add_labeled_item(&pane, "D", false, cx);
6194        add_labeled_item(&pane, "E", false, cx);
6195        assert_item_labels(&pane, ["A^", "B", "C^", "D", "E*"], cx);
6196
6197        pane.update_in(cx, |pane, window, cx| {
6198            pane.close_clean_items(
6199                &CloseCleanItems {
6200                    close_pinned: false,
6201                },
6202                window,
6203                cx,
6204            )
6205        })
6206        .await
6207        .unwrap();
6208        assert_item_labels(&pane, ["A^", "C*^"], cx);
6209    }
6210
6211    #[gpui::test]
6212    async fn test_close_items_to_the_left(cx: &mut TestAppContext) {
6213        init_test(cx);
6214        let fs = FakeFs::new(cx.executor());
6215
6216        let project = Project::test(fs, None, cx).await;
6217        let (workspace, cx) =
6218            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
6219        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6220
6221        set_labeled_items(&pane, ["A", "B", "C*", "D", "E"], cx);
6222
6223        pane.update_in(cx, |pane, window, cx| {
6224            pane.close_items_to_the_left_by_id(
6225                None,
6226                &CloseItemsToTheLeft {
6227                    close_pinned: false,
6228                },
6229                window,
6230                cx,
6231            )
6232        })
6233        .await
6234        .unwrap();
6235        assert_item_labels(&pane, ["C*", "D", "E"], cx);
6236    }
6237
6238    #[gpui::test]
6239    async fn test_close_items_to_the_right(cx: &mut TestAppContext) {
6240        init_test(cx);
6241        let fs = FakeFs::new(cx.executor());
6242
6243        let project = Project::test(fs, None, cx).await;
6244        let (workspace, cx) =
6245            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
6246        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6247
6248        set_labeled_items(&pane, ["A", "B", "C*", "D", "E"], cx);
6249
6250        pane.update_in(cx, |pane, window, cx| {
6251            pane.close_items_to_the_right_by_id(
6252                None,
6253                &CloseItemsToTheRight {
6254                    close_pinned: false,
6255                },
6256                window,
6257                cx,
6258            )
6259        })
6260        .await
6261        .unwrap();
6262        assert_item_labels(&pane, ["A", "B", "C*"], cx);
6263    }
6264
6265    #[gpui::test]
6266    async fn test_close_all_items(cx: &mut TestAppContext) {
6267        init_test(cx);
6268        let fs = FakeFs::new(cx.executor());
6269
6270        let project = Project::test(fs, None, cx).await;
6271        let (workspace, cx) =
6272            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
6273        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6274
6275        let item_a = add_labeled_item(&pane, "A", false, cx);
6276        add_labeled_item(&pane, "B", false, cx);
6277        add_labeled_item(&pane, "C", false, cx);
6278        assert_item_labels(&pane, ["A", "B", "C*"], cx);
6279
6280        pane.update_in(cx, |pane, window, cx| {
6281            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
6282            pane.pin_tab_at(ix, window, cx);
6283            pane.close_all_items(
6284                &CloseAllItems {
6285                    save_intent: None,
6286                    close_pinned: false,
6287                },
6288                window,
6289                cx,
6290            )
6291        })
6292        .await
6293        .unwrap();
6294        assert_item_labels(&pane, ["A*!"], cx);
6295
6296        pane.update_in(cx, |pane, window, cx| {
6297            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
6298            pane.unpin_tab_at(ix, window, cx);
6299            pane.close_all_items(
6300                &CloseAllItems {
6301                    save_intent: None,
6302                    close_pinned: false,
6303                },
6304                window,
6305                cx,
6306            )
6307        })
6308        .await
6309        .unwrap();
6310
6311        assert_item_labels(&pane, [], cx);
6312
6313        add_labeled_item(&pane, "A", true, cx).update(cx, |item, cx| {
6314            item.project_items
6315                .push(TestProjectItem::new_dirty(1, "A.txt", cx))
6316        });
6317        add_labeled_item(&pane, "B", true, cx).update(cx, |item, cx| {
6318            item.project_items
6319                .push(TestProjectItem::new_dirty(2, "B.txt", cx))
6320        });
6321        add_labeled_item(&pane, "C", true, cx).update(cx, |item, cx| {
6322            item.project_items
6323                .push(TestProjectItem::new_dirty(3, "C.txt", cx))
6324        });
6325        assert_item_labels(&pane, ["A^", "B^", "C*^"], cx);
6326
6327        let save = pane.update_in(cx, |pane, window, cx| {
6328            pane.close_all_items(
6329                &CloseAllItems {
6330                    save_intent: None,
6331                    close_pinned: false,
6332                },
6333                window,
6334                cx,
6335            )
6336        });
6337
6338        cx.executor().run_until_parked();
6339        cx.simulate_prompt_answer("Save all");
6340        save.await.unwrap();
6341        assert_item_labels(&pane, [], cx);
6342
6343        add_labeled_item(&pane, "A", true, cx);
6344        add_labeled_item(&pane, "B", true, cx);
6345        add_labeled_item(&pane, "C", true, cx);
6346        assert_item_labels(&pane, ["A^", "B^", "C*^"], cx);
6347        let save = pane.update_in(cx, |pane, window, cx| {
6348            pane.close_all_items(
6349                &CloseAllItems {
6350                    save_intent: None,
6351                    close_pinned: false,
6352                },
6353                window,
6354                cx,
6355            )
6356        });
6357
6358        cx.executor().run_until_parked();
6359        cx.simulate_prompt_answer("Discard all");
6360        save.await.unwrap();
6361        assert_item_labels(&pane, [], cx);
6362    }
6363
6364    #[gpui::test]
6365    async fn test_close_multibuffer_items(cx: &mut TestAppContext) {
6366        init_test(cx);
6367        let fs = FakeFs::new(cx.executor());
6368
6369        let project = Project::test(fs, None, cx).await;
6370        let (workspace, cx) =
6371            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
6372        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6373
6374        let add_labeled_item = |pane: &Entity<Pane>,
6375                                label,
6376                                is_dirty,
6377                                kind: ItemBufferKind,
6378                                cx: &mut VisualTestContext| {
6379            pane.update_in(cx, |pane, window, cx| {
6380                let labeled_item = Box::new(cx.new(|cx| {
6381                    TestItem::new(cx)
6382                        .with_label(label)
6383                        .with_dirty(is_dirty)
6384                        .with_buffer_kind(kind)
6385                }));
6386                pane.add_item(labeled_item.clone(), false, false, None, window, cx);
6387                labeled_item
6388            })
6389        };
6390
6391        let item_a = add_labeled_item(&pane, "A", false, ItemBufferKind::Multibuffer, cx);
6392        add_labeled_item(&pane, "B", false, ItemBufferKind::Multibuffer, cx);
6393        add_labeled_item(&pane, "C", false, ItemBufferKind::Singleton, cx);
6394        assert_item_labels(&pane, ["A", "B", "C*"], cx);
6395
6396        pane.update_in(cx, |pane, window, cx| {
6397            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
6398            pane.pin_tab_at(ix, window, cx);
6399            pane.close_multibuffer_items(
6400                &CloseMultibufferItems {
6401                    save_intent: None,
6402                    close_pinned: false,
6403                },
6404                window,
6405                cx,
6406            )
6407        })
6408        .await
6409        .unwrap();
6410        assert_item_labels(&pane, ["A!", "C*"], cx);
6411
6412        pane.update_in(cx, |pane, window, cx| {
6413            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
6414            pane.unpin_tab_at(ix, window, cx);
6415            pane.close_multibuffer_items(
6416                &CloseMultibufferItems {
6417                    save_intent: None,
6418                    close_pinned: false,
6419                },
6420                window,
6421                cx,
6422            )
6423        })
6424        .await
6425        .unwrap();
6426
6427        assert_item_labels(&pane, ["C*"], cx);
6428
6429        add_labeled_item(&pane, "A", true, ItemBufferKind::Singleton, cx).update(cx, |item, cx| {
6430            item.project_items
6431                .push(TestProjectItem::new_dirty(1, "A.txt", cx))
6432        });
6433        add_labeled_item(&pane, "B", true, ItemBufferKind::Multibuffer, cx).update(
6434            cx,
6435            |item, cx| {
6436                item.project_items
6437                    .push(TestProjectItem::new_dirty(2, "B.txt", cx))
6438            },
6439        );
6440        add_labeled_item(&pane, "D", true, ItemBufferKind::Multibuffer, cx).update(
6441            cx,
6442            |item, cx| {
6443                item.project_items
6444                    .push(TestProjectItem::new_dirty(3, "D.txt", cx))
6445            },
6446        );
6447        assert_item_labels(&pane, ["C", "A^", "B^", "D*^"], cx);
6448
6449        let save = pane.update_in(cx, |pane, window, cx| {
6450            pane.close_multibuffer_items(
6451                &CloseMultibufferItems {
6452                    save_intent: None,
6453                    close_pinned: false,
6454                },
6455                window,
6456                cx,
6457            )
6458        });
6459
6460        cx.executor().run_until_parked();
6461        cx.simulate_prompt_answer("Save all");
6462        save.await.unwrap();
6463        assert_item_labels(&pane, ["C", "A*^"], cx);
6464
6465        add_labeled_item(&pane, "B", true, ItemBufferKind::Multibuffer, cx).update(
6466            cx,
6467            |item, cx| {
6468                item.project_items
6469                    .push(TestProjectItem::new_dirty(2, "B.txt", cx))
6470            },
6471        );
6472        add_labeled_item(&pane, "D", true, ItemBufferKind::Multibuffer, cx).update(
6473            cx,
6474            |item, cx| {
6475                item.project_items
6476                    .push(TestProjectItem::new_dirty(3, "D.txt", cx))
6477            },
6478        );
6479        assert_item_labels(&pane, ["C", "A^", "B^", "D*^"], cx);
6480        let save = pane.update_in(cx, |pane, window, cx| {
6481            pane.close_multibuffer_items(
6482                &CloseMultibufferItems {
6483                    save_intent: None,
6484                    close_pinned: false,
6485                },
6486                window,
6487                cx,
6488            )
6489        });
6490
6491        cx.executor().run_until_parked();
6492        cx.simulate_prompt_answer("Discard all");
6493        save.await.unwrap();
6494        assert_item_labels(&pane, ["C", "A*^"], cx);
6495    }
6496
6497    #[gpui::test]
6498    async fn test_close_with_save_intent(cx: &mut TestAppContext) {
6499        init_test(cx);
6500        let fs = FakeFs::new(cx.executor());
6501
6502        let project = Project::test(fs, None, cx).await;
6503        let (workspace, cx) =
6504            cx.add_window_view(|window, cx| Workspace::test_new(project, window, cx));
6505        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6506
6507        let a = cx.update(|_, cx| TestProjectItem::new_dirty(1, "A.txt", cx));
6508        let b = cx.update(|_, cx| TestProjectItem::new_dirty(1, "B.txt", cx));
6509        let c = cx.update(|_, cx| TestProjectItem::new_dirty(1, "C.txt", cx));
6510
6511        add_labeled_item(&pane, "AB", true, cx).update(cx, |item, _| {
6512            item.project_items.push(a.clone());
6513            item.project_items.push(b.clone());
6514        });
6515        add_labeled_item(&pane, "C", true, cx)
6516            .update(cx, |item, _| item.project_items.push(c.clone()));
6517        assert_item_labels(&pane, ["AB^", "C*^"], cx);
6518
6519        pane.update_in(cx, |pane, window, cx| {
6520            pane.close_all_items(
6521                &CloseAllItems {
6522                    save_intent: Some(SaveIntent::Save),
6523                    close_pinned: false,
6524                },
6525                window,
6526                cx,
6527            )
6528        })
6529        .await
6530        .unwrap();
6531
6532        assert_item_labels(&pane, [], cx);
6533        cx.update(|_, cx| {
6534            assert!(!a.read(cx).is_dirty);
6535            assert!(!b.read(cx).is_dirty);
6536            assert!(!c.read(cx).is_dirty);
6537        });
6538    }
6539
6540    #[gpui::test]
6541    async fn test_new_tab_scrolls_into_view_completely(cx: &mut TestAppContext) {
6542        // Arrange
6543        init_test(cx);
6544        let fs = FakeFs::new(cx.executor());
6545
6546        let project = Project::test(fs, None, cx).await;
6547        let (workspace, cx) =
6548            cx.add_window_view(|window, cx| Workspace::test_new(project, window, cx));
6549        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6550
6551        cx.simulate_resize(size(px(300.), px(300.)));
6552
6553        add_labeled_item(&pane, "untitled", false, cx);
6554        add_labeled_item(&pane, "untitled", false, cx);
6555        add_labeled_item(&pane, "untitled", false, cx);
6556        add_labeled_item(&pane, "untitled", false, cx);
6557        // Act: this should trigger a scroll
6558        add_labeled_item(&pane, "untitled", false, cx);
6559        // Assert
6560        let tab_bar_scroll_handle =
6561            pane.update_in(cx, |pane, _window, _cx| pane.tab_bar_scroll_handle.clone());
6562        assert_eq!(tab_bar_scroll_handle.children_count(), 6);
6563        let tab_bounds = cx.debug_bounds("TAB-3").unwrap();
6564        let new_tab_button_bounds = cx.debug_bounds("ICON-Plus").unwrap();
6565        let scroll_bounds = tab_bar_scroll_handle.bounds();
6566        let scroll_offset = tab_bar_scroll_handle.offset();
6567        assert!(tab_bounds.right() <= scroll_bounds.right() + scroll_offset.x);
6568        // -39.5 is the magic number for this setup
6569        assert_eq!(scroll_offset.x, px(-39.5));
6570        assert!(
6571            !tab_bounds.intersects(&new_tab_button_bounds),
6572            "Tab should not overlap with the new tab button, if this is failing check if there's been a redesign!"
6573        );
6574    }
6575
6576    #[gpui::test]
6577    async fn test_close_all_items_including_pinned(cx: &mut TestAppContext) {
6578        init_test(cx);
6579        let fs = FakeFs::new(cx.executor());
6580
6581        let project = Project::test(fs, None, cx).await;
6582        let (workspace, cx) =
6583            cx.add_window_view(|window, cx| Workspace::test_new(project, window, cx));
6584        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6585
6586        let item_a = add_labeled_item(&pane, "A", false, cx);
6587        add_labeled_item(&pane, "B", false, cx);
6588        add_labeled_item(&pane, "C", false, cx);
6589        assert_item_labels(&pane, ["A", "B", "C*"], cx);
6590
6591        pane.update_in(cx, |pane, window, cx| {
6592            let ix = pane.index_for_item_id(item_a.item_id()).unwrap();
6593            pane.pin_tab_at(ix, window, cx);
6594            pane.close_all_items(
6595                &CloseAllItems {
6596                    save_intent: None,
6597                    close_pinned: true,
6598                },
6599                window,
6600                cx,
6601            )
6602        })
6603        .await
6604        .unwrap();
6605        assert_item_labels(&pane, [], cx);
6606    }
6607
6608    #[gpui::test]
6609    async fn test_close_pinned_tab_with_non_pinned_in_same_pane(cx: &mut TestAppContext) {
6610        init_test(cx);
6611        let fs = FakeFs::new(cx.executor());
6612        let project = Project::test(fs, None, cx).await;
6613        let (workspace, cx) =
6614            cx.add_window_view(|window, cx| Workspace::test_new(project, window, cx));
6615
6616        // Non-pinned tabs in same pane
6617        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6618        add_labeled_item(&pane, "A", false, cx);
6619        add_labeled_item(&pane, "B", false, cx);
6620        add_labeled_item(&pane, "C", false, cx);
6621        pane.update_in(cx, |pane, window, cx| {
6622            pane.pin_tab_at(0, window, cx);
6623        });
6624        set_labeled_items(&pane, ["A*", "B", "C"], cx);
6625        pane.update_in(cx, |pane, window, cx| {
6626            pane.close_active_item(
6627                &CloseActiveItem {
6628                    save_intent: None,
6629                    close_pinned: false,
6630                },
6631                window,
6632                cx,
6633            )
6634            .unwrap();
6635        });
6636        // Non-pinned tab should be active
6637        assert_item_labels(&pane, ["A!", "B*", "C"], cx);
6638    }
6639
6640    #[gpui::test]
6641    async fn test_close_pinned_tab_with_non_pinned_in_different_pane(cx: &mut TestAppContext) {
6642        init_test(cx);
6643        let fs = FakeFs::new(cx.executor());
6644        let project = Project::test(fs, None, cx).await;
6645        let (workspace, cx) =
6646            cx.add_window_view(|window, cx| Workspace::test_new(project, window, cx));
6647
6648        // No non-pinned tabs in same pane, non-pinned tabs in another pane
6649        let pane1 = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6650        let pane2 = workspace.update_in(cx, |workspace, window, cx| {
6651            workspace.split_pane(pane1.clone(), SplitDirection::Right, window, cx)
6652        });
6653        add_labeled_item(&pane1, "A", false, cx);
6654        pane1.update_in(cx, |pane, window, cx| {
6655            pane.pin_tab_at(0, window, cx);
6656        });
6657        set_labeled_items(&pane1, ["A*"], cx);
6658        add_labeled_item(&pane2, "B", false, cx);
6659        set_labeled_items(&pane2, ["B"], cx);
6660        pane1.update_in(cx, |pane, window, cx| {
6661            pane.close_active_item(
6662                &CloseActiveItem {
6663                    save_intent: None,
6664                    close_pinned: false,
6665                },
6666                window,
6667                cx,
6668            )
6669            .unwrap();
6670        });
6671        //  Non-pinned tab of other pane should be active
6672        assert_item_labels(&pane2, ["B*"], cx);
6673    }
6674
6675    #[gpui::test]
6676    async fn ensure_item_closing_actions_do_not_panic_when_no_items_exist(cx: &mut TestAppContext) {
6677        init_test(cx);
6678        let fs = FakeFs::new(cx.executor());
6679        let project = Project::test(fs, None, cx).await;
6680        let (workspace, cx) =
6681            cx.add_window_view(|window, cx| Workspace::test_new(project, window, cx));
6682
6683        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6684        assert_item_labels(&pane, [], cx);
6685
6686        pane.update_in(cx, |pane, window, cx| {
6687            pane.close_active_item(
6688                &CloseActiveItem {
6689                    save_intent: None,
6690                    close_pinned: false,
6691                },
6692                window,
6693                cx,
6694            )
6695        })
6696        .await
6697        .unwrap();
6698
6699        pane.update_in(cx, |pane, window, cx| {
6700            pane.close_other_items(
6701                &CloseOtherItems {
6702                    save_intent: None,
6703                    close_pinned: false,
6704                },
6705                None,
6706                window,
6707                cx,
6708            )
6709        })
6710        .await
6711        .unwrap();
6712
6713        pane.update_in(cx, |pane, window, cx| {
6714            pane.close_all_items(
6715                &CloseAllItems {
6716                    save_intent: None,
6717                    close_pinned: false,
6718                },
6719                window,
6720                cx,
6721            )
6722        })
6723        .await
6724        .unwrap();
6725
6726        pane.update_in(cx, |pane, window, cx| {
6727            pane.close_clean_items(
6728                &CloseCleanItems {
6729                    close_pinned: false,
6730                },
6731                window,
6732                cx,
6733            )
6734        })
6735        .await
6736        .unwrap();
6737
6738        pane.update_in(cx, |pane, window, cx| {
6739            pane.close_items_to_the_right_by_id(
6740                None,
6741                &CloseItemsToTheRight {
6742                    close_pinned: false,
6743                },
6744                window,
6745                cx,
6746            )
6747        })
6748        .await
6749        .unwrap();
6750
6751        pane.update_in(cx, |pane, window, cx| {
6752            pane.close_items_to_the_left_by_id(
6753                None,
6754                &CloseItemsToTheLeft {
6755                    close_pinned: false,
6756                },
6757                window,
6758                cx,
6759            )
6760        })
6761        .await
6762        .unwrap();
6763    }
6764
6765    #[gpui::test]
6766    async fn test_item_swapping_actions(cx: &mut TestAppContext) {
6767        init_test(cx);
6768        let fs = FakeFs::new(cx.executor());
6769        let project = Project::test(fs, None, cx).await;
6770        let (workspace, cx) =
6771            cx.add_window_view(|window, cx| Workspace::test_new(project, window, cx));
6772
6773        let pane = workspace.read_with(cx, |workspace, _| workspace.active_pane().clone());
6774        assert_item_labels(&pane, [], cx);
6775
6776        // Test that these actions do not panic
6777        pane.update_in(cx, |pane, window, cx| {
6778            pane.swap_item_right(&Default::default(), window, cx);
6779        });
6780
6781        pane.update_in(cx, |pane, window, cx| {
6782            pane.swap_item_left(&Default::default(), window, cx);
6783        });
6784
6785        add_labeled_item(&pane, "A", false, cx);
6786        add_labeled_item(&pane, "B", false, cx);
6787        add_labeled_item(&pane, "C", false, cx);
6788        assert_item_labels(&pane, ["A", "B", "C*"], cx);
6789
6790        pane.update_in(cx, |pane, window, cx| {
6791            pane.swap_item_right(&Default::default(), window, cx);
6792        });
6793        assert_item_labels(&pane, ["A", "B", "C*"], cx);
6794
6795        pane.update_in(cx, |pane, window, cx| {
6796            pane.swap_item_left(&Default::default(), window, cx);
6797        });
6798        assert_item_labels(&pane, ["A", "C*", "B"], cx);
6799
6800        pane.update_in(cx, |pane, window, cx| {
6801            pane.swap_item_left(&Default::default(), window, cx);
6802        });
6803        assert_item_labels(&pane, ["C*", "A", "B"], cx);
6804
6805        pane.update_in(cx, |pane, window, cx| {
6806            pane.swap_item_left(&Default::default(), window, cx);
6807        });
6808        assert_item_labels(&pane, ["C*", "A", "B"], cx);
6809
6810        pane.update_in(cx, |pane, window, cx| {
6811            pane.swap_item_right(&Default::default(), window, cx);
6812        });
6813        assert_item_labels(&pane, ["A", "C*", "B"], cx);
6814    }
6815
6816    fn init_test(cx: &mut TestAppContext) {
6817        cx.update(|cx| {
6818            let settings_store = SettingsStore::test(cx);
6819            cx.set_global(settings_store);
6820            theme::init(LoadThemes::JustBase, cx);
6821            crate::init_settings(cx);
6822            Project::init_settings(cx);
6823        });
6824    }
6825
6826    fn set_max_tabs(cx: &mut TestAppContext, value: Option<usize>) {
6827        cx.update_global(|store: &mut SettingsStore, cx| {
6828            store.update_user_settings(cx, |settings| {
6829                settings.workspace.max_tabs = value.map(|v| NonZero::new(v).unwrap())
6830            });
6831        });
6832    }
6833
6834    fn add_labeled_item(
6835        pane: &Entity<Pane>,
6836        label: &str,
6837        is_dirty: bool,
6838        cx: &mut VisualTestContext,
6839    ) -> Box<Entity<TestItem>> {
6840        pane.update_in(cx, |pane, window, cx| {
6841            let labeled_item =
6842                Box::new(cx.new(|cx| TestItem::new(cx).with_label(label).with_dirty(is_dirty)));
6843            pane.add_item(labeled_item.clone(), false, false, None, window, cx);
6844            labeled_item
6845        })
6846    }
6847
6848    fn set_labeled_items<const COUNT: usize>(
6849        pane: &Entity<Pane>,
6850        labels: [&str; COUNT],
6851        cx: &mut VisualTestContext,
6852    ) -> [Box<Entity<TestItem>>; COUNT] {
6853        pane.update_in(cx, |pane, window, cx| {
6854            pane.items.clear();
6855            let mut active_item_index = 0;
6856
6857            let mut index = 0;
6858            let items = labels.map(|mut label| {
6859                if label.ends_with('*') {
6860                    label = label.trim_end_matches('*');
6861                    active_item_index = index;
6862                }
6863
6864                let labeled_item = Box::new(cx.new(|cx| TestItem::new(cx).with_label(label)));
6865                pane.add_item(labeled_item.clone(), false, false, None, window, cx);
6866                index += 1;
6867                labeled_item
6868            });
6869
6870            pane.activate_item(active_item_index, false, false, window, cx);
6871
6872            items
6873        })
6874    }
6875
6876    // Assert the item label, with the active item label suffixed with a '*'
6877    #[track_caller]
6878    fn assert_item_labels<const COUNT: usize>(
6879        pane: &Entity<Pane>,
6880        expected_states: [&str; COUNT],
6881        cx: &mut VisualTestContext,
6882    ) {
6883        let actual_states = pane.update(cx, |pane, cx| {
6884            pane.items
6885                .iter()
6886                .enumerate()
6887                .map(|(ix, item)| {
6888                    let mut state = item
6889                        .to_any()
6890                        .downcast::<TestItem>()
6891                        .unwrap()
6892                        .read(cx)
6893                        .label
6894                        .clone();
6895                    if ix == pane.active_item_index {
6896                        state.push('*');
6897                    }
6898                    if item.is_dirty(cx) {
6899                        state.push('^');
6900                    }
6901                    if pane.is_tab_pinned(ix) {
6902                        state.push('!');
6903                    }
6904                    state
6905                })
6906                .collect::<Vec<_>>()
6907        });
6908        assert_eq!(
6909            actual_states, expected_states,
6910            "pane items do not match expectation"
6911        );
6912    }
6913}