1pub mod lsp_status;
   2pub mod menu;
   3pub mod pane;
   4pub mod pane_group;
   5pub mod sidebar;
   6mod status_bar;
   7mod toolbar;
   8
   9use anyhow::{anyhow, Context, Result};
  10use client::{
  11    proto, Authenticate, ChannelList, Client, PeerId, Subscription, TypedEnvelope, User, UserStore,
  12};
  13use clock::ReplicaId;
  14use collections::{hash_map, HashMap, HashSet};
  15use gpui::{
  16    actions,
  17    color::Color,
  18    elements::*,
  19    geometry::{rect::RectF, vector::vec2f, PathBuilder},
  20    impl_internal_actions,
  21    json::{self, ToJson},
  22    platform::{CursorStyle, WindowOptions},
  23    AnyModelHandle, AnyViewHandle, AppContext, AsyncAppContext, Border, Entity, ImageData,
  24    ModelHandle, MutableAppContext, PathPromptOptions, PromptLevel, RenderContext, Task, View,
  25    ViewContext, ViewHandle, WeakViewHandle,
  26};
  27use language::LanguageRegistry;
  28use log::error;
  29pub use pane::*;
  30pub use pane_group::*;
  31use postage::prelude::Stream;
  32use project::{fs, Fs, Project, ProjectEntryId, ProjectPath, Worktree};
  33use settings::Settings;
  34use sidebar::{Side, Sidebar, SidebarButtons, ToggleSidebarItem, ToggleSidebarItemFocus};
  35use status_bar::StatusBar;
  36pub use status_bar::StatusItemView;
  37use std::{
  38    any::{Any, TypeId},
  39    cell::RefCell,
  40    fmt,
  41    future::Future,
  42    path::{Path, PathBuf},
  43    rc::Rc,
  44    sync::{
  45        atomic::{AtomicBool, Ordering::SeqCst},
  46        Arc,
  47    },
  48};
  49use theme::{Theme, ThemeRegistry};
  50pub use toolbar::{ToolbarItemLocation, ToolbarItemView};
  51use util::ResultExt;
  52
  53type ProjectItemBuilders = HashMap<
  54    TypeId,
  55    fn(usize, ModelHandle<Project>, AnyModelHandle, &mut MutableAppContext) -> Box<dyn ItemHandle>,
  56>;
  57
  58type FollowableItemBuilder = fn(
  59    ViewHandle<Pane>,
  60    ModelHandle<Project>,
  61    &mut Option<proto::view::Variant>,
  62    &mut MutableAppContext,
  63) -> Option<Task<Result<Box<dyn FollowableItemHandle>>>>;
  64type FollowableItemBuilders = HashMap<
  65    TypeId,
  66    (
  67        FollowableItemBuilder,
  68        fn(AnyViewHandle) -> Box<dyn FollowableItemHandle>,
  69    ),
  70>;
  71
  72actions!(
  73    workspace,
  74    [
  75        ToggleShare,
  76        Unfollow,
  77        Save,
  78        ActivatePreviousPane,
  79        ActivateNextPane,
  80        FollowNextCollaborator,
  81    ]
  82);
  83
  84#[derive(Clone)]
  85pub struct Open(pub Arc<AppState>);
  86
  87#[derive(Clone)]
  88pub struct OpenNew(pub Arc<AppState>);
  89
  90#[derive(Clone)]
  91pub struct OpenPaths {
  92    pub paths: Vec<PathBuf>,
  93    pub app_state: Arc<AppState>,
  94}
  95
  96#[derive(Clone)]
  97pub struct ToggleFollow(pub PeerId);
  98
  99#[derive(Clone)]
 100pub struct JoinProject {
 101    pub project_id: u64,
 102    pub app_state: Arc<AppState>,
 103}
 104
 105impl_internal_actions!(
 106    workspace,
 107    [Open, OpenNew, OpenPaths, ToggleFollow, JoinProject]
 108);
 109
 110pub fn init(client: &Arc<Client>, cx: &mut MutableAppContext) {
 111    pane::init(cx);
 112
 113    cx.add_global_action(open);
 114    cx.add_global_action(move |action: &OpenPaths, cx: &mut MutableAppContext| {
 115        open_paths(&action.paths, &action.app_state, cx).detach();
 116    });
 117    cx.add_global_action(move |action: &OpenNew, cx: &mut MutableAppContext| {
 118        open_new(&action.0, cx)
 119    });
 120    cx.add_global_action(move |action: &JoinProject, cx: &mut MutableAppContext| {
 121        join_project(action.project_id, &action.app_state, cx).detach();
 122    });
 123
 124    cx.add_action(Workspace::toggle_share);
 125    cx.add_async_action(Workspace::toggle_follow);
 126    cx.add_async_action(Workspace::follow_next_collaborator);
 127    cx.add_action(
 128        |workspace: &mut Workspace, _: &Unfollow, cx: &mut ViewContext<Workspace>| {
 129            let pane = workspace.active_pane().clone();
 130            workspace.unfollow(&pane, cx);
 131        },
 132    );
 133    cx.add_action(
 134        |workspace: &mut Workspace, _: &Save, cx: &mut ViewContext<Workspace>| {
 135            workspace.save_active_item(cx).detach_and_log_err(cx);
 136        },
 137    );
 138    cx.add_action(Workspace::toggle_sidebar_item);
 139    cx.add_action(Workspace::toggle_sidebar_item_focus);
 140    cx.add_action(|workspace: &mut Workspace, _: &ActivatePreviousPane, cx| {
 141        workspace.activate_previous_pane(cx)
 142    });
 143    cx.add_action(|workspace: &mut Workspace, _: &ActivateNextPane, cx| {
 144        workspace.activate_next_pane(cx)
 145    });
 146
 147    client.add_view_request_handler(Workspace::handle_follow);
 148    client.add_view_message_handler(Workspace::handle_unfollow);
 149    client.add_view_message_handler(Workspace::handle_update_followers);
 150}
 151
 152pub fn register_project_item<I: ProjectItem>(cx: &mut MutableAppContext) {
 153    cx.update_default_global(|builders: &mut ProjectItemBuilders, _| {
 154        builders.insert(TypeId::of::<I::Item>(), |window_id, project, model, cx| {
 155            let item = model.downcast::<I::Item>().unwrap();
 156            Box::new(cx.add_view(window_id, |cx| I::for_project_item(project, item, cx)))
 157        });
 158    });
 159}
 160
 161pub fn register_followable_item<I: FollowableItem>(cx: &mut MutableAppContext) {
 162    cx.update_default_global(|builders: &mut FollowableItemBuilders, _| {
 163        builders.insert(
 164            TypeId::of::<I>(),
 165            (
 166                |pane, project, state, cx| {
 167                    I::from_state_proto(pane, project, state, cx).map(|task| {
 168                        cx.foreground()
 169                            .spawn(async move { Ok(Box::new(task.await?) as Box<_>) })
 170                    })
 171                },
 172                |this| Box::new(this.downcast::<I>().unwrap()),
 173            ),
 174        );
 175    });
 176}
 177
 178pub struct AppState {
 179    pub languages: Arc<LanguageRegistry>,
 180    pub themes: Arc<ThemeRegistry>,
 181    pub client: Arc<client::Client>,
 182    pub user_store: ModelHandle<client::UserStore>,
 183    pub fs: Arc<dyn fs::Fs>,
 184    pub channel_list: ModelHandle<client::ChannelList>,
 185    pub build_window_options: fn() -> WindowOptions<'static>,
 186    pub build_workspace:
 187        fn(ModelHandle<Project>, &Arc<AppState>, &mut ViewContext<Workspace>) -> Workspace,
 188}
 189
 190pub trait Item: View {
 191    fn deactivated(&mut self, _: &mut ViewContext<Self>) {}
 192    fn navigate(&mut self, _: Box<dyn Any>, _: &mut ViewContext<Self>) -> bool {
 193        false
 194    }
 195    fn tab_content(&self, style: &theme::Tab, cx: &AppContext) -> ElementBox;
 196    fn project_path(&self, cx: &AppContext) -> Option<ProjectPath>;
 197    fn project_entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId>;
 198    fn set_nav_history(&mut self, _: ItemNavHistory, _: &mut ViewContext<Self>);
 199    fn clone_on_split(&self, _: &mut ViewContext<Self>) -> Option<Self>
 200    where
 201        Self: Sized,
 202    {
 203        None
 204    }
 205    fn is_dirty(&self, _: &AppContext) -> bool {
 206        false
 207    }
 208    fn has_conflict(&self, _: &AppContext) -> bool {
 209        false
 210    }
 211    fn can_save(&self, cx: &AppContext) -> bool;
 212    fn save(
 213        &mut self,
 214        project: ModelHandle<Project>,
 215        cx: &mut ViewContext<Self>,
 216    ) -> Task<Result<()>>;
 217    fn can_save_as(&self, cx: &AppContext) -> bool;
 218    fn save_as(
 219        &mut self,
 220        project: ModelHandle<Project>,
 221        abs_path: PathBuf,
 222        cx: &mut ViewContext<Self>,
 223    ) -> Task<Result<()>>;
 224    fn reload(
 225        &mut self,
 226        project: ModelHandle<Project>,
 227        cx: &mut ViewContext<Self>,
 228    ) -> Task<Result<()>>;
 229    fn should_activate_item_on_event(_: &Self::Event) -> bool {
 230        false
 231    }
 232    fn should_close_item_on_event(_: &Self::Event) -> bool {
 233        false
 234    }
 235    fn should_update_tab_on_event(_: &Self::Event) -> bool {
 236        false
 237    }
 238    fn act_as_type(
 239        &self,
 240        type_id: TypeId,
 241        self_handle: &ViewHandle<Self>,
 242        _: &AppContext,
 243    ) -> Option<AnyViewHandle> {
 244        if TypeId::of::<Self>() == type_id {
 245            Some(self_handle.into())
 246        } else {
 247            None
 248        }
 249    }
 250}
 251
 252pub trait ProjectItem: Item {
 253    type Item: project::Item;
 254
 255    fn for_project_item(
 256        project: ModelHandle<Project>,
 257        item: ModelHandle<Self::Item>,
 258        cx: &mut ViewContext<Self>,
 259    ) -> Self;
 260}
 261
 262pub trait FollowableItem: Item {
 263    fn to_state_proto(&self, cx: &AppContext) -> Option<proto::view::Variant>;
 264    fn from_state_proto(
 265        pane: ViewHandle<Pane>,
 266        project: ModelHandle<Project>,
 267        state: &mut Option<proto::view::Variant>,
 268        cx: &mut MutableAppContext,
 269    ) -> Option<Task<Result<ViewHandle<Self>>>>;
 270    fn add_event_to_update_proto(
 271        &self,
 272        event: &Self::Event,
 273        update: &mut Option<proto::update_view::Variant>,
 274        cx: &AppContext,
 275    ) -> bool;
 276    fn apply_update_proto(
 277        &mut self,
 278        message: proto::update_view::Variant,
 279        cx: &mut ViewContext<Self>,
 280    ) -> Result<()>;
 281
 282    fn set_leader_replica_id(&mut self, leader_replica_id: Option<u16>, cx: &mut ViewContext<Self>);
 283    fn should_unfollow_on_event(event: &Self::Event, cx: &AppContext) -> bool;
 284}
 285
 286pub trait FollowableItemHandle: ItemHandle {
 287    fn set_leader_replica_id(&self, leader_replica_id: Option<u16>, cx: &mut MutableAppContext);
 288    fn to_state_proto(&self, cx: &AppContext) -> Option<proto::view::Variant>;
 289    fn add_event_to_update_proto(
 290        &self,
 291        event: &dyn Any,
 292        update: &mut Option<proto::update_view::Variant>,
 293        cx: &AppContext,
 294    ) -> bool;
 295    fn apply_update_proto(
 296        &self,
 297        message: proto::update_view::Variant,
 298        cx: &mut MutableAppContext,
 299    ) -> Result<()>;
 300    fn should_unfollow_on_event(&self, event: &dyn Any, cx: &AppContext) -> bool;
 301}
 302
 303impl<T: FollowableItem> FollowableItemHandle for ViewHandle<T> {
 304    fn set_leader_replica_id(&self, leader_replica_id: Option<u16>, cx: &mut MutableAppContext) {
 305        self.update(cx, |this, cx| {
 306            this.set_leader_replica_id(leader_replica_id, cx)
 307        })
 308    }
 309
 310    fn to_state_proto(&self, cx: &AppContext) -> Option<proto::view::Variant> {
 311        self.read(cx).to_state_proto(cx)
 312    }
 313
 314    fn add_event_to_update_proto(
 315        &self,
 316        event: &dyn Any,
 317        update: &mut Option<proto::update_view::Variant>,
 318        cx: &AppContext,
 319    ) -> bool {
 320        if let Some(event) = event.downcast_ref() {
 321            self.read(cx).add_event_to_update_proto(event, update, cx)
 322        } else {
 323            false
 324        }
 325    }
 326
 327    fn apply_update_proto(
 328        &self,
 329        message: proto::update_view::Variant,
 330        cx: &mut MutableAppContext,
 331    ) -> Result<()> {
 332        self.update(cx, |this, cx| this.apply_update_proto(message, cx))
 333    }
 334
 335    fn should_unfollow_on_event(&self, event: &dyn Any, cx: &AppContext) -> bool {
 336        if let Some(event) = event.downcast_ref() {
 337            T::should_unfollow_on_event(event, cx)
 338        } else {
 339            false
 340        }
 341    }
 342}
 343
 344pub trait ItemHandle: 'static + fmt::Debug {
 345    fn tab_content(&self, style: &theme::Tab, cx: &AppContext) -> ElementBox;
 346    fn project_path(&self, cx: &AppContext) -> Option<ProjectPath>;
 347    fn project_entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId>;
 348    fn boxed_clone(&self) -> Box<dyn ItemHandle>;
 349    fn set_nav_history(&self, nav_history: Rc<RefCell<NavHistory>>, cx: &mut MutableAppContext);
 350    fn clone_on_split(&self, cx: &mut MutableAppContext) -> Option<Box<dyn ItemHandle>>;
 351    fn added_to_pane(
 352        &self,
 353        workspace: &mut Workspace,
 354        pane: ViewHandle<Pane>,
 355        cx: &mut ViewContext<Workspace>,
 356    );
 357    fn deactivated(&self, cx: &mut MutableAppContext);
 358    fn navigate(&self, data: Box<dyn Any>, cx: &mut MutableAppContext) -> bool;
 359    fn id(&self) -> usize;
 360    fn to_any(&self) -> AnyViewHandle;
 361    fn is_dirty(&self, cx: &AppContext) -> bool;
 362    fn has_conflict(&self, cx: &AppContext) -> bool;
 363    fn can_save(&self, cx: &AppContext) -> bool;
 364    fn can_save_as(&self, cx: &AppContext) -> bool;
 365    fn save(&self, project: ModelHandle<Project>, cx: &mut MutableAppContext) -> Task<Result<()>>;
 366    fn save_as(
 367        &self,
 368        project: ModelHandle<Project>,
 369        abs_path: PathBuf,
 370        cx: &mut MutableAppContext,
 371    ) -> Task<Result<()>>;
 372    fn reload(&self, project: ModelHandle<Project>, cx: &mut MutableAppContext)
 373        -> Task<Result<()>>;
 374    fn act_as_type(&self, type_id: TypeId, cx: &AppContext) -> Option<AnyViewHandle>;
 375    fn to_followable_item_handle(&self, cx: &AppContext) -> Option<Box<dyn FollowableItemHandle>>;
 376    fn on_release(
 377        &self,
 378        cx: &mut MutableAppContext,
 379        callback: Box<dyn FnOnce(&mut MutableAppContext)>,
 380    ) -> gpui::Subscription;
 381}
 382
 383pub trait WeakItemHandle {
 384    fn id(&self) -> usize;
 385    fn upgrade(&self, cx: &AppContext) -> Option<Box<dyn ItemHandle>>;
 386}
 387
 388impl dyn ItemHandle {
 389    pub fn downcast<T: View>(&self) -> Option<ViewHandle<T>> {
 390        self.to_any().downcast()
 391    }
 392
 393    pub fn act_as<T: View>(&self, cx: &AppContext) -> Option<ViewHandle<T>> {
 394        self.act_as_type(TypeId::of::<T>(), cx)
 395            .and_then(|t| t.downcast())
 396    }
 397}
 398
 399impl<T: Item> ItemHandle for ViewHandle<T> {
 400    fn tab_content(&self, style: &theme::Tab, cx: &AppContext) -> ElementBox {
 401        self.read(cx).tab_content(style, cx)
 402    }
 403
 404    fn project_path(&self, cx: &AppContext) -> Option<ProjectPath> {
 405        self.read(cx).project_path(cx)
 406    }
 407
 408    fn project_entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId> {
 409        self.read(cx).project_entry_id(cx)
 410    }
 411
 412    fn boxed_clone(&self) -> Box<dyn ItemHandle> {
 413        Box::new(self.clone())
 414    }
 415
 416    fn set_nav_history(&self, nav_history: Rc<RefCell<NavHistory>>, cx: &mut MutableAppContext) {
 417        self.update(cx, |item, cx| {
 418            item.set_nav_history(ItemNavHistory::new(nav_history, &cx.handle()), cx);
 419        })
 420    }
 421
 422    fn clone_on_split(&self, cx: &mut MutableAppContext) -> Option<Box<dyn ItemHandle>> {
 423        self.update(cx, |item, cx| {
 424            cx.add_option_view(|cx| item.clone_on_split(cx))
 425        })
 426        .map(|handle| Box::new(handle) as Box<dyn ItemHandle>)
 427    }
 428
 429    fn added_to_pane(
 430        &self,
 431        workspace: &mut Workspace,
 432        pane: ViewHandle<Pane>,
 433        cx: &mut ViewContext<Workspace>,
 434    ) {
 435        if let Some(followed_item) = self.to_followable_item_handle(cx) {
 436            if let Some(message) = followed_item.to_state_proto(cx) {
 437                workspace.update_followers(
 438                    proto::update_followers::Variant::CreateView(proto::View {
 439                        id: followed_item.id() as u64,
 440                        variant: Some(message),
 441                        leader_id: workspace.leader_for_pane(&pane).map(|id| id.0),
 442                    }),
 443                    cx,
 444                );
 445            }
 446        }
 447
 448        let pending_update = Rc::new(RefCell::new(None));
 449        let pending_update_scheduled = Rc::new(AtomicBool::new(false));
 450        let pane = pane.downgrade();
 451        cx.subscribe(self, move |workspace, item, event, cx| {
 452            let pane = if let Some(pane) = pane.upgrade(cx) {
 453                pane
 454            } else {
 455                log::error!("unexpected item event after pane was dropped");
 456                return;
 457            };
 458
 459            if let Some(item) = item.to_followable_item_handle(cx) {
 460                let leader_id = workspace.leader_for_pane(&pane);
 461
 462                if leader_id.is_some() && item.should_unfollow_on_event(event, cx) {
 463                    workspace.unfollow(&pane, cx);
 464                }
 465
 466                if item.add_event_to_update_proto(event, &mut *pending_update.borrow_mut(), cx)
 467                    && !pending_update_scheduled.load(SeqCst)
 468                {
 469                    pending_update_scheduled.store(true, SeqCst);
 470                    cx.after_window_update({
 471                        let pending_update = pending_update.clone();
 472                        let pending_update_scheduled = pending_update_scheduled.clone();
 473                        move |this, cx| {
 474                            pending_update_scheduled.store(false, SeqCst);
 475                            this.update_followers(
 476                                proto::update_followers::Variant::UpdateView(proto::UpdateView {
 477                                    id: item.id() as u64,
 478                                    variant: pending_update.borrow_mut().take(),
 479                                    leader_id: leader_id.map(|id| id.0),
 480                                }),
 481                                cx,
 482                            );
 483                        }
 484                    });
 485                }
 486            }
 487
 488            if T::should_close_item_on_event(event) {
 489                Pane::close_item(workspace, pane, item.id(), cx).detach_and_log_err(cx);
 490                return;
 491            }
 492
 493            if T::should_activate_item_on_event(event) {
 494                pane.update(cx, |pane, cx| {
 495                    if let Some(ix) = pane.index_for_item(&item) {
 496                        pane.activate_item(ix, true, cx);
 497                        pane.activate(cx);
 498                    }
 499                });
 500            }
 501
 502            if T::should_update_tab_on_event(event) {
 503                pane.update(cx, |_, cx| cx.notify());
 504            }
 505        })
 506        .detach();
 507    }
 508
 509    fn deactivated(&self, cx: &mut MutableAppContext) {
 510        self.update(cx, |this, cx| this.deactivated(cx));
 511    }
 512
 513    fn navigate(&self, data: Box<dyn Any>, cx: &mut MutableAppContext) -> bool {
 514        self.update(cx, |this, cx| this.navigate(data, cx))
 515    }
 516
 517    fn id(&self) -> usize {
 518        self.id()
 519    }
 520
 521    fn to_any(&self) -> AnyViewHandle {
 522        self.into()
 523    }
 524
 525    fn is_dirty(&self, cx: &AppContext) -> bool {
 526        self.read(cx).is_dirty(cx)
 527    }
 528
 529    fn has_conflict(&self, cx: &AppContext) -> bool {
 530        self.read(cx).has_conflict(cx)
 531    }
 532
 533    fn can_save(&self, cx: &AppContext) -> bool {
 534        self.read(cx).can_save(cx)
 535    }
 536
 537    fn can_save_as(&self, cx: &AppContext) -> bool {
 538        self.read(cx).can_save_as(cx)
 539    }
 540
 541    fn save(&self, project: ModelHandle<Project>, cx: &mut MutableAppContext) -> Task<Result<()>> {
 542        self.update(cx, |item, cx| item.save(project, cx))
 543    }
 544
 545    fn save_as(
 546        &self,
 547        project: ModelHandle<Project>,
 548        abs_path: PathBuf,
 549        cx: &mut MutableAppContext,
 550    ) -> Task<anyhow::Result<()>> {
 551        self.update(cx, |item, cx| item.save_as(project, abs_path, cx))
 552    }
 553
 554    fn reload(
 555        &self,
 556        project: ModelHandle<Project>,
 557        cx: &mut MutableAppContext,
 558    ) -> Task<Result<()>> {
 559        self.update(cx, |item, cx| item.reload(project, cx))
 560    }
 561
 562    fn act_as_type(&self, type_id: TypeId, cx: &AppContext) -> Option<AnyViewHandle> {
 563        self.read(cx).act_as_type(type_id, self, cx)
 564    }
 565
 566    fn to_followable_item_handle(&self, cx: &AppContext) -> Option<Box<dyn FollowableItemHandle>> {
 567        if cx.has_global::<FollowableItemBuilders>() {
 568            let builders = cx.global::<FollowableItemBuilders>();
 569            let item = self.to_any();
 570            Some(builders.get(&item.view_type())?.1(item))
 571        } else {
 572            None
 573        }
 574    }
 575
 576    fn on_release(
 577        &self,
 578        cx: &mut MutableAppContext,
 579        callback: Box<dyn FnOnce(&mut MutableAppContext)>,
 580    ) -> gpui::Subscription {
 581        cx.observe_release(self, move |_, cx| callback(cx))
 582    }
 583}
 584
 585impl Into<AnyViewHandle> for Box<dyn ItemHandle> {
 586    fn into(self) -> AnyViewHandle {
 587        self.to_any()
 588    }
 589}
 590
 591impl Clone for Box<dyn ItemHandle> {
 592    fn clone(&self) -> Box<dyn ItemHandle> {
 593        self.boxed_clone()
 594    }
 595}
 596
 597impl<T: Item> WeakItemHandle for WeakViewHandle<T> {
 598    fn id(&self) -> usize {
 599        self.id()
 600    }
 601
 602    fn upgrade(&self, cx: &AppContext) -> Option<Box<dyn ItemHandle>> {
 603        self.upgrade(cx).map(|v| Box::new(v) as Box<dyn ItemHandle>)
 604    }
 605}
 606
 607#[derive(Clone)]
 608pub struct WorkspaceParams {
 609    pub project: ModelHandle<Project>,
 610    pub client: Arc<Client>,
 611    pub fs: Arc<dyn Fs>,
 612    pub languages: Arc<LanguageRegistry>,
 613    pub themes: Arc<ThemeRegistry>,
 614    pub user_store: ModelHandle<UserStore>,
 615    pub channel_list: ModelHandle<ChannelList>,
 616}
 617
 618impl WorkspaceParams {
 619    #[cfg(any(test, feature = "test-support"))]
 620    pub fn test(cx: &mut MutableAppContext) -> Self {
 621        let settings = Settings::test(cx);
 622        cx.set_global(settings);
 623
 624        let fs = project::FakeFs::new(cx.background().clone());
 625        let languages = Arc::new(LanguageRegistry::test());
 626        let http_client = client::test::FakeHttpClient::with_404_response();
 627        let client = Client::new(http_client.clone());
 628        let user_store = cx.add_model(|cx| UserStore::new(client.clone(), http_client, cx));
 629        let project = Project::local(
 630            client.clone(),
 631            user_store.clone(),
 632            languages.clone(),
 633            fs.clone(),
 634            cx,
 635        );
 636        Self {
 637            project,
 638            channel_list: cx
 639                .add_model(|cx| ChannelList::new(user_store.clone(), client.clone(), cx)),
 640            client,
 641            themes: ThemeRegistry::new((), cx.font_cache().clone()),
 642            fs,
 643            languages,
 644            user_store,
 645        }
 646    }
 647
 648    #[cfg(any(test, feature = "test-support"))]
 649    pub fn local(app_state: &Arc<AppState>, cx: &mut MutableAppContext) -> Self {
 650        Self {
 651            project: Project::local(
 652                app_state.client.clone(),
 653                app_state.user_store.clone(),
 654                app_state.languages.clone(),
 655                app_state.fs.clone(),
 656                cx,
 657            ),
 658            client: app_state.client.clone(),
 659            fs: app_state.fs.clone(),
 660            themes: app_state.themes.clone(),
 661            languages: app_state.languages.clone(),
 662            user_store: app_state.user_store.clone(),
 663            channel_list: app_state.channel_list.clone(),
 664        }
 665    }
 666}
 667
 668pub enum Event {
 669    PaneAdded(ViewHandle<Pane>),
 670}
 671
 672pub struct Workspace {
 673    weak_self: WeakViewHandle<Self>,
 674    client: Arc<Client>,
 675    user_store: ModelHandle<client::UserStore>,
 676    remote_entity_subscription: Option<Subscription>,
 677    fs: Arc<dyn Fs>,
 678    themes: Arc<ThemeRegistry>,
 679    modal: Option<AnyViewHandle>,
 680    center: PaneGroup,
 681    left_sidebar: ViewHandle<Sidebar>,
 682    right_sidebar: ViewHandle<Sidebar>,
 683    panes: Vec<ViewHandle<Pane>>,
 684    active_pane: ViewHandle<Pane>,
 685    status_bar: ViewHandle<StatusBar>,
 686    project: ModelHandle<Project>,
 687    leader_state: LeaderState,
 688    follower_states_by_leader: FollowerStatesByLeader,
 689    last_leaders_by_pane: HashMap<WeakViewHandle<Pane>, PeerId>,
 690    _observe_current_user: Task<()>,
 691}
 692
 693#[derive(Default)]
 694struct LeaderState {
 695    followers: HashSet<PeerId>,
 696}
 697
 698type FollowerStatesByLeader = HashMap<PeerId, HashMap<ViewHandle<Pane>, FollowerState>>;
 699
 700#[derive(Default)]
 701struct FollowerState {
 702    active_view_id: Option<u64>,
 703    items_by_leader_view_id: HashMap<u64, FollowerItem>,
 704}
 705
 706#[derive(Debug)]
 707enum FollowerItem {
 708    Loading(Vec<proto::update_view::Variant>),
 709    Loaded(Box<dyn FollowableItemHandle>),
 710}
 711
 712impl Workspace {
 713    pub fn new(params: &WorkspaceParams, cx: &mut ViewContext<Self>) -> Self {
 714        cx.observe(&params.project, |_, project, cx| {
 715            if project.read(cx).is_read_only() {
 716                cx.blur();
 717            }
 718            cx.notify()
 719        })
 720        .detach();
 721
 722        cx.subscribe(&params.project, move |this, project, event, cx| {
 723            match event {
 724                project::Event::RemoteIdChanged(remote_id) => {
 725                    this.project_remote_id_changed(*remote_id, cx);
 726                }
 727                project::Event::CollaboratorLeft(peer_id) => {
 728                    this.collaborator_left(*peer_id, cx);
 729                }
 730                _ => {}
 731            }
 732            if project.read(cx).is_read_only() {
 733                cx.blur();
 734            }
 735            cx.notify()
 736        })
 737        .detach();
 738
 739        let pane = cx.add_view(|cx| Pane::new(cx));
 740        let pane_id = pane.id();
 741        cx.observe(&pane, move |me, _, cx| {
 742            let active_entry = me.active_project_path(cx);
 743            me.project
 744                .update(cx, |project, cx| project.set_active_path(active_entry, cx));
 745        })
 746        .detach();
 747        cx.subscribe(&pane, move |me, _, event, cx| {
 748            me.handle_pane_event(pane_id, event, cx)
 749        })
 750        .detach();
 751        cx.focus(&pane);
 752        cx.emit(Event::PaneAdded(pane.clone()));
 753
 754        let mut current_user = params.user_store.read(cx).watch_current_user().clone();
 755        let mut connection_status = params.client.status().clone();
 756        let _observe_current_user = cx.spawn_weak(|this, mut cx| async move {
 757            current_user.recv().await;
 758            connection_status.recv().await;
 759            let mut stream =
 760                Stream::map(current_user, drop).merge(Stream::map(connection_status, drop));
 761
 762            while stream.recv().await.is_some() {
 763                cx.update(|cx| {
 764                    if let Some(this) = this.upgrade(cx) {
 765                        this.update(cx, |_, cx| cx.notify());
 766                    }
 767                })
 768            }
 769        });
 770
 771        let weak_self = cx.weak_handle();
 772
 773        cx.emit_global(WorkspaceCreated(weak_self.clone()));
 774
 775        let left_sidebar = cx.add_view(|_| Sidebar::new(Side::Left));
 776        let right_sidebar = cx.add_view(|_| Sidebar::new(Side::Right));
 777        let left_sidebar_buttons = cx.add_view(|cx| SidebarButtons::new(left_sidebar.clone(), cx));
 778        let right_sidebar_buttons =
 779            cx.add_view(|cx| SidebarButtons::new(right_sidebar.clone(), cx));
 780        let status_bar = cx.add_view(|cx| {
 781            let mut status_bar = StatusBar::new(&pane.clone(), cx);
 782            status_bar.add_left_item(left_sidebar_buttons, cx);
 783            status_bar.add_right_item(right_sidebar_buttons, cx);
 784            status_bar
 785        });
 786
 787        let mut this = Workspace {
 788            modal: None,
 789            weak_self,
 790            center: PaneGroup::new(pane.clone()),
 791            panes: vec![pane.clone()],
 792            active_pane: pane.clone(),
 793            status_bar,
 794            client: params.client.clone(),
 795            remote_entity_subscription: None,
 796            user_store: params.user_store.clone(),
 797            fs: params.fs.clone(),
 798            themes: params.themes.clone(),
 799            left_sidebar,
 800            right_sidebar,
 801            project: params.project.clone(),
 802            leader_state: Default::default(),
 803            follower_states_by_leader: Default::default(),
 804            last_leaders_by_pane: Default::default(),
 805            _observe_current_user,
 806        };
 807        this.project_remote_id_changed(this.project.read(cx).remote_id(), cx);
 808        this
 809    }
 810
 811    pub fn weak_handle(&self) -> WeakViewHandle<Self> {
 812        self.weak_self.clone()
 813    }
 814
 815    pub fn left_sidebar(&self) -> &ViewHandle<Sidebar> {
 816        &self.left_sidebar
 817    }
 818
 819    pub fn right_sidebar(&self) -> &ViewHandle<Sidebar> {
 820        &self.right_sidebar
 821    }
 822
 823    pub fn status_bar(&self) -> &ViewHandle<StatusBar> {
 824        &self.status_bar
 825    }
 826
 827    pub fn project(&self) -> &ModelHandle<Project> {
 828        &self.project
 829    }
 830
 831    pub fn themes(&self) -> Arc<ThemeRegistry> {
 832        self.themes.clone()
 833    }
 834
 835    pub fn worktrees<'a>(
 836        &self,
 837        cx: &'a AppContext,
 838    ) -> impl 'a + Iterator<Item = ModelHandle<Worktree>> {
 839        self.project.read(cx).worktrees(cx)
 840    }
 841
 842    pub fn contains_paths(&self, paths: &[PathBuf], cx: &AppContext) -> bool {
 843        paths.iter().all(|path| self.contains_path(&path, cx))
 844    }
 845
 846    pub fn contains_path(&self, path: &Path, cx: &AppContext) -> bool {
 847        for worktree in self.worktrees(cx) {
 848            let worktree = worktree.read(cx).as_local();
 849            if worktree.map_or(false, |w| w.contains_abs_path(path)) {
 850                return true;
 851            }
 852        }
 853        false
 854    }
 855
 856    pub fn worktree_scans_complete(&self, cx: &AppContext) -> impl Future<Output = ()> + 'static {
 857        let futures = self
 858            .worktrees(cx)
 859            .filter_map(|worktree| worktree.read(cx).as_local())
 860            .map(|worktree| worktree.scan_complete())
 861            .collect::<Vec<_>>();
 862        async move {
 863            for future in futures {
 864                future.await;
 865            }
 866        }
 867    }
 868
 869    pub fn open_paths(
 870        &mut self,
 871        mut abs_paths: Vec<PathBuf>,
 872        cx: &mut ViewContext<Self>,
 873    ) -> Task<Vec<Option<Result<Box<dyn ItemHandle>, Arc<anyhow::Error>>>>> {
 874        let fs = self.fs.clone();
 875
 876        // Sort the paths to ensure we add worktrees for parents before their children.
 877        abs_paths.sort_unstable();
 878        cx.spawn(|this, mut cx| async move {
 879            let mut entries = Vec::new();
 880            for path in &abs_paths {
 881                entries.push(
 882                    this.update(&mut cx, |this, cx| this.project_path_for_path(path, cx))
 883                        .await
 884                        .ok(),
 885                );
 886            }
 887
 888            let tasks = abs_paths
 889                .iter()
 890                .cloned()
 891                .zip(entries.into_iter())
 892                .map(|(abs_path, project_path)| {
 893                    let this = this.clone();
 894                    cx.spawn(|mut cx| {
 895                        let fs = fs.clone();
 896                        async move {
 897                            let project_path = project_path?;
 898                            if fs.is_file(&abs_path).await {
 899                                Some(
 900                                    this.update(&mut cx, |this, cx| {
 901                                        this.open_path(project_path, cx)
 902                                    })
 903                                    .await,
 904                                )
 905                            } else {
 906                                None
 907                            }
 908                        }
 909                    })
 910                })
 911                .collect::<Vec<_>>();
 912
 913            futures::future::join_all(tasks).await
 914        })
 915    }
 916
 917    fn project_path_for_path(
 918        &self,
 919        abs_path: &Path,
 920        cx: &mut ViewContext<Self>,
 921    ) -> Task<Result<ProjectPath>> {
 922        let entry = self.project().update(cx, |project, cx| {
 923            project.find_or_create_local_worktree(abs_path, true, cx)
 924        });
 925        cx.spawn(|_, cx| async move {
 926            let (worktree, path) = entry.await?;
 927            Ok(ProjectPath {
 928                worktree_id: worktree.read_with(&cx, |t, _| t.id()),
 929                path: path.into(),
 930            })
 931        })
 932    }
 933
 934    // Returns the model that was toggled closed if it was open
 935    pub fn toggle_modal<V, F>(
 936        &mut self,
 937        cx: &mut ViewContext<Self>,
 938        add_view: F,
 939    ) -> Option<ViewHandle<V>>
 940    where
 941        V: 'static + View,
 942        F: FnOnce(&mut ViewContext<Self>, &mut Self) -> ViewHandle<V>,
 943    {
 944        cx.notify();
 945        // Whatever modal was visible is getting clobbered. If its the same type as V, then return
 946        // it. Otherwise, create a new modal and set it as active.
 947        let already_open_modal = self.modal.take().and_then(|modal| modal.downcast::<V>());
 948        if let Some(already_open_modal) = already_open_modal {
 949            cx.focus_self();
 950            Some(already_open_modal)
 951        } else {
 952            let modal = add_view(cx, self);
 953            cx.focus(&modal);
 954            self.modal = Some(modal.into());
 955            None
 956        }
 957    }
 958
 959    pub fn modal(&self) -> Option<&AnyViewHandle> {
 960        self.modal.as_ref()
 961    }
 962
 963    pub fn dismiss_modal(&mut self, cx: &mut ViewContext<Self>) {
 964        if self.modal.take().is_some() {
 965            cx.focus(&self.active_pane);
 966            cx.notify();
 967        }
 968    }
 969
 970    pub fn items<'a>(
 971        &'a self,
 972        cx: &'a AppContext,
 973    ) -> impl 'a + Iterator<Item = &Box<dyn ItemHandle>> {
 974        self.panes.iter().flat_map(|pane| pane.read(cx).items())
 975    }
 976
 977    pub fn item_of_type<T: Item>(&self, cx: &AppContext) -> Option<ViewHandle<T>> {
 978        self.items_of_type(cx).max_by_key(|item| item.id())
 979    }
 980
 981    pub fn items_of_type<'a, T: Item>(
 982        &'a self,
 983        cx: &'a AppContext,
 984    ) -> impl 'a + Iterator<Item = ViewHandle<T>> {
 985        self.panes
 986            .iter()
 987            .flat_map(|pane| pane.read(cx).items_of_type())
 988    }
 989
 990    pub fn active_item(&self, cx: &AppContext) -> Option<Box<dyn ItemHandle>> {
 991        self.active_pane().read(cx).active_item()
 992    }
 993
 994    fn active_project_path(&self, cx: &ViewContext<Self>) -> Option<ProjectPath> {
 995        self.active_item(cx).and_then(|item| item.project_path(cx))
 996    }
 997
 998    pub fn save_active_item(&mut self, cx: &mut ViewContext<Self>) -> Task<Result<()>> {
 999        let project = self.project.clone();
1000        if let Some(item) = self.active_item(cx) {
1001            if item.can_save(cx) {
1002                if item.has_conflict(cx.as_ref()) {
1003                    const CONFLICT_MESSAGE: &'static str = "This file has changed on disk since you started editing it. Do you want to overwrite it?";
1004
1005                    let mut answer = cx.prompt(
1006                        PromptLevel::Warning,
1007                        CONFLICT_MESSAGE,
1008                        &["Overwrite", "Cancel"],
1009                    );
1010                    cx.spawn(|_, mut cx| async move {
1011                        let answer = answer.recv().await;
1012                        if answer == Some(0) {
1013                            cx.update(|cx| item.save(project, cx)).await?;
1014                        }
1015                        Ok(())
1016                    })
1017                } else {
1018                    item.save(project, cx)
1019                }
1020            } else if item.can_save_as(cx) {
1021                let worktree = self.worktrees(cx).next();
1022                let start_abs_path = worktree
1023                    .and_then(|w| w.read(cx).as_local())
1024                    .map_or(Path::new(""), |w| w.abs_path())
1025                    .to_path_buf();
1026                let mut abs_path = cx.prompt_for_new_path(&start_abs_path);
1027                cx.spawn(|_, mut cx| async move {
1028                    if let Some(abs_path) = abs_path.recv().await.flatten() {
1029                        cx.update(|cx| item.save_as(project, abs_path, cx)).await?;
1030                    }
1031                    Ok(())
1032                })
1033            } else {
1034                Task::ready(Ok(()))
1035            }
1036        } else {
1037            Task::ready(Ok(()))
1038        }
1039    }
1040
1041    pub fn toggle_sidebar_item(&mut self, action: &ToggleSidebarItem, cx: &mut ViewContext<Self>) {
1042        let sidebar = match action.side {
1043            Side::Left => &mut self.left_sidebar,
1044            Side::Right => &mut self.right_sidebar,
1045        };
1046        let active_item = sidebar.update(cx, |sidebar, cx| {
1047            sidebar.toggle_item(action.item_index, cx);
1048            sidebar.active_item().cloned()
1049        });
1050        if let Some(active_item) = active_item {
1051            cx.focus(active_item);
1052        } else {
1053            cx.focus_self();
1054        }
1055        cx.notify();
1056    }
1057
1058    pub fn toggle_sidebar_item_focus(
1059        &mut self,
1060        action: &ToggleSidebarItemFocus,
1061        cx: &mut ViewContext<Self>,
1062    ) {
1063        let sidebar = match action.side {
1064            Side::Left => &mut self.left_sidebar,
1065            Side::Right => &mut self.right_sidebar,
1066        };
1067        let active_item = sidebar.update(cx, |sidebar, cx| {
1068            sidebar.toggle_item(action.item_index, cx);
1069            sidebar.active_item().cloned()
1070        });
1071        if let Some(active_item) = active_item {
1072            if active_item.is_focused(cx) {
1073                cx.focus_self();
1074            } else {
1075                cx.focus(active_item);
1076            }
1077        }
1078        cx.notify();
1079    }
1080
1081    fn add_pane(&mut self, cx: &mut ViewContext<Self>) -> ViewHandle<Pane> {
1082        let pane = cx.add_view(|cx| Pane::new(cx));
1083        let pane_id = pane.id();
1084        cx.observe(&pane, move |me, _, cx| {
1085            let active_entry = me.active_project_path(cx);
1086            me.project
1087                .update(cx, |project, cx| project.set_active_path(active_entry, cx));
1088        })
1089        .detach();
1090        cx.subscribe(&pane, move |me, _, event, cx| {
1091            me.handle_pane_event(pane_id, event, cx)
1092        })
1093        .detach();
1094        self.panes.push(pane.clone());
1095        self.activate_pane(pane.clone(), cx);
1096        cx.emit(Event::PaneAdded(pane.clone()));
1097        pane
1098    }
1099
1100    pub fn add_item(&mut self, item: Box<dyn ItemHandle>, cx: &mut ViewContext<Self>) {
1101        let pane = self.active_pane().clone();
1102        Pane::add_item(self, pane, item, true, cx);
1103    }
1104
1105    pub fn open_path(
1106        &mut self,
1107        path: impl Into<ProjectPath>,
1108        cx: &mut ViewContext<Self>,
1109    ) -> Task<Result<Box<dyn ItemHandle>, Arc<anyhow::Error>>> {
1110        let pane = self.active_pane().downgrade();
1111        let task = self.load_path(path.into(), cx);
1112        cx.spawn(|this, mut cx| async move {
1113            let (project_entry_id, build_item) = task.await?;
1114            let pane = pane
1115                .upgrade(&cx)
1116                .ok_or_else(|| anyhow!("pane was closed"))?;
1117            this.update(&mut cx, |this, cx| {
1118                Ok(Pane::open_item(
1119                    this,
1120                    pane,
1121                    project_entry_id,
1122                    cx,
1123                    build_item,
1124                ))
1125            })
1126        })
1127    }
1128
1129    pub(crate) fn load_path(
1130        &mut self,
1131        path: ProjectPath,
1132        cx: &mut ViewContext<Self>,
1133    ) -> Task<
1134        Result<(
1135            ProjectEntryId,
1136            impl 'static + FnOnce(&mut MutableAppContext) -> Box<dyn ItemHandle>,
1137        )>,
1138    > {
1139        let project = self.project().clone();
1140        let project_item = project.update(cx, |project, cx| project.open_path(path, cx));
1141        let window_id = cx.window_id();
1142        cx.as_mut().spawn(|mut cx| async move {
1143            let (project_entry_id, project_item) = project_item.await?;
1144            let build_item = cx.update(|cx| {
1145                cx.default_global::<ProjectItemBuilders>()
1146                    .get(&project_item.model_type())
1147                    .ok_or_else(|| anyhow!("no item builder for project item"))
1148                    .cloned()
1149            })?;
1150            let build_item =
1151                move |cx: &mut MutableAppContext| build_item(window_id, project, project_item, cx);
1152            Ok((project_entry_id, build_item))
1153        })
1154    }
1155
1156    pub fn open_project_item<T>(
1157        &mut self,
1158        project_item: ModelHandle<T::Item>,
1159        cx: &mut ViewContext<Self>,
1160    ) -> ViewHandle<T>
1161    where
1162        T: ProjectItem,
1163    {
1164        use project::Item as _;
1165
1166        let entry_id = project_item.read(cx).entry_id(cx);
1167        if let Some(item) = entry_id
1168            .and_then(|entry_id| self.active_pane().read(cx).item_for_entry(entry_id, cx))
1169            .and_then(|item| item.downcast())
1170        {
1171            self.activate_item(&item, cx);
1172            return item;
1173        }
1174
1175        let item = cx.add_view(|cx| T::for_project_item(self.project().clone(), project_item, cx));
1176        self.add_item(Box::new(item.clone()), cx);
1177        item
1178    }
1179
1180    pub fn activate_item(&mut self, item: &dyn ItemHandle, cx: &mut ViewContext<Self>) -> bool {
1181        let result = self.panes.iter().find_map(|pane| {
1182            if let Some(ix) = pane.read(cx).index_for_item(item) {
1183                Some((pane.clone(), ix))
1184            } else {
1185                None
1186            }
1187        });
1188        if let Some((pane, ix)) = result {
1189            self.activate_pane(pane.clone(), cx);
1190            pane.update(cx, |pane, cx| pane.activate_item(ix, true, cx));
1191            true
1192        } else {
1193            false
1194        }
1195    }
1196
1197    pub fn activate_next_pane(&mut self, cx: &mut ViewContext<Self>) {
1198        let next_pane = {
1199            let panes = self.center.panes();
1200            let ix = panes
1201                .iter()
1202                .position(|pane| **pane == self.active_pane)
1203                .unwrap();
1204            let next_ix = (ix + 1) % panes.len();
1205            panes[next_ix].clone()
1206        };
1207        self.activate_pane(next_pane, cx);
1208    }
1209
1210    pub fn activate_previous_pane(&mut self, cx: &mut ViewContext<Self>) {
1211        let prev_pane = {
1212            let panes = self.center.panes();
1213            let ix = panes
1214                .iter()
1215                .position(|pane| **pane == self.active_pane)
1216                .unwrap();
1217            let prev_ix = if ix == 0 { panes.len() - 1 } else { ix - 1 };
1218            panes[prev_ix].clone()
1219        };
1220        self.activate_pane(prev_pane, cx);
1221    }
1222
1223    fn activate_pane(&mut self, pane: ViewHandle<Pane>, cx: &mut ViewContext<Self>) {
1224        if self.active_pane != pane {
1225            self.active_pane = pane.clone();
1226            self.status_bar.update(cx, |status_bar, cx| {
1227                status_bar.set_active_pane(&self.active_pane, cx);
1228            });
1229            cx.focus(&self.active_pane);
1230            cx.notify();
1231        }
1232
1233        self.update_followers(
1234            proto::update_followers::Variant::UpdateActiveView(proto::UpdateActiveView {
1235                id: self.active_item(cx).map(|item| item.id() as u64),
1236                leader_id: self.leader_for_pane(&pane).map(|id| id.0),
1237            }),
1238            cx,
1239        );
1240    }
1241
1242    fn handle_pane_event(
1243        &mut self,
1244        pane_id: usize,
1245        event: &pane::Event,
1246        cx: &mut ViewContext<Self>,
1247    ) {
1248        if let Some(pane) = self.pane(pane_id) {
1249            match event {
1250                pane::Event::Split(direction) => {
1251                    self.split_pane(pane, *direction, cx);
1252                }
1253                pane::Event::Remove => {
1254                    self.remove_pane(pane, cx);
1255                }
1256                pane::Event::Activate => {
1257                    self.activate_pane(pane, cx);
1258                }
1259                pane::Event::ActivateItem { local } => {
1260                    if *local {
1261                        self.unfollow(&pane, cx);
1262                    }
1263                }
1264            }
1265        } else {
1266            error!("pane {} not found", pane_id);
1267        }
1268    }
1269
1270    pub fn split_pane(
1271        &mut self,
1272        pane: ViewHandle<Pane>,
1273        direction: SplitDirection,
1274        cx: &mut ViewContext<Self>,
1275    ) -> ViewHandle<Pane> {
1276        let new_pane = self.add_pane(cx);
1277        self.activate_pane(new_pane.clone(), cx);
1278        if let Some(item) = pane.read(cx).active_item() {
1279            if let Some(clone) = item.clone_on_split(cx.as_mut()) {
1280                Pane::add_item(self, new_pane.clone(), clone, true, cx);
1281            }
1282        }
1283        self.center.split(&pane, &new_pane, direction).unwrap();
1284        cx.notify();
1285        new_pane
1286    }
1287
1288    fn remove_pane(&mut self, pane: ViewHandle<Pane>, cx: &mut ViewContext<Self>) {
1289        if self.center.remove(&pane).unwrap() {
1290            self.panes.retain(|p| p != &pane);
1291            self.activate_pane(self.panes.last().unwrap().clone(), cx);
1292            self.unfollow(&pane, cx);
1293            self.last_leaders_by_pane.remove(&pane.downgrade());
1294            cx.notify();
1295        }
1296    }
1297
1298    pub fn panes(&self) -> &[ViewHandle<Pane>] {
1299        &self.panes
1300    }
1301
1302    fn pane(&self, pane_id: usize) -> Option<ViewHandle<Pane>> {
1303        self.panes.iter().find(|pane| pane.id() == pane_id).cloned()
1304    }
1305
1306    pub fn active_pane(&self) -> &ViewHandle<Pane> {
1307        &self.active_pane
1308    }
1309
1310    fn toggle_share(&mut self, _: &ToggleShare, cx: &mut ViewContext<Self>) {
1311        self.project.update(cx, |project, cx| {
1312            if project.is_local() {
1313                if project.is_shared() {
1314                    project.unshare(cx);
1315                } else if project.can_share(cx) {
1316                    project.share(cx).detach();
1317                }
1318            }
1319        });
1320    }
1321
1322    fn project_remote_id_changed(&mut self, remote_id: Option<u64>, cx: &mut ViewContext<Self>) {
1323        if let Some(remote_id) = remote_id {
1324            self.remote_entity_subscription =
1325                Some(self.client.add_view_for_remote_entity(remote_id, cx));
1326        } else {
1327            self.remote_entity_subscription.take();
1328        }
1329    }
1330
1331    fn collaborator_left(&mut self, peer_id: PeerId, cx: &mut ViewContext<Self>) {
1332        self.leader_state.followers.remove(&peer_id);
1333        if let Some(states_by_pane) = self.follower_states_by_leader.remove(&peer_id) {
1334            for state in states_by_pane.into_values() {
1335                for item in state.items_by_leader_view_id.into_values() {
1336                    if let FollowerItem::Loaded(item) = item {
1337                        item.set_leader_replica_id(None, cx);
1338                    }
1339                }
1340            }
1341        }
1342        cx.notify();
1343    }
1344
1345    pub fn toggle_follow(
1346        &mut self,
1347        ToggleFollow(leader_id): &ToggleFollow,
1348        cx: &mut ViewContext<Self>,
1349    ) -> Option<Task<Result<()>>> {
1350        let leader_id = *leader_id;
1351        let pane = self.active_pane().clone();
1352
1353        if let Some(prev_leader_id) = self.unfollow(&pane, cx) {
1354            if leader_id == prev_leader_id {
1355                return None;
1356            }
1357        }
1358
1359        self.last_leaders_by_pane
1360            .insert(pane.downgrade(), leader_id);
1361        self.follower_states_by_leader
1362            .entry(leader_id)
1363            .or_default()
1364            .insert(pane.clone(), Default::default());
1365        cx.notify();
1366
1367        let project_id = self.project.read(cx).remote_id()?;
1368        let request = self.client.request(proto::Follow {
1369            project_id,
1370            leader_id: leader_id.0,
1371        });
1372        Some(cx.spawn_weak(|this, mut cx| async move {
1373            let response = request.await?;
1374            if let Some(this) = this.upgrade(&cx) {
1375                this.update(&mut cx, |this, _| {
1376                    let state = this
1377                        .follower_states_by_leader
1378                        .get_mut(&leader_id)
1379                        .and_then(|states_by_pane| states_by_pane.get_mut(&pane))
1380                        .ok_or_else(|| anyhow!("following interrupted"))?;
1381                    state.active_view_id = response.active_view_id;
1382                    Ok::<_, anyhow::Error>(())
1383                })?;
1384                Self::add_views_from_leader(this, leader_id, vec![pane], response.views, &mut cx)
1385                    .await?;
1386            }
1387            Ok(())
1388        }))
1389    }
1390
1391    pub fn follow_next_collaborator(
1392        &mut self,
1393        _: &FollowNextCollaborator,
1394        cx: &mut ViewContext<Self>,
1395    ) -> Option<Task<Result<()>>> {
1396        let collaborators = self.project.read(cx).collaborators();
1397        let next_leader_id = if let Some(leader_id) = self.leader_for_pane(&self.active_pane) {
1398            let mut collaborators = collaborators.keys().copied();
1399            while let Some(peer_id) = collaborators.next() {
1400                if peer_id == leader_id {
1401                    break;
1402                }
1403            }
1404            collaborators.next()
1405        } else if let Some(last_leader_id) =
1406            self.last_leaders_by_pane.get(&self.active_pane.downgrade())
1407        {
1408            if collaborators.contains_key(last_leader_id) {
1409                Some(*last_leader_id)
1410            } else {
1411                None
1412            }
1413        } else {
1414            None
1415        };
1416
1417        next_leader_id
1418            .or_else(|| collaborators.keys().copied().next())
1419            .and_then(|leader_id| self.toggle_follow(&ToggleFollow(leader_id), cx))
1420    }
1421
1422    pub fn unfollow(
1423        &mut self,
1424        pane: &ViewHandle<Pane>,
1425        cx: &mut ViewContext<Self>,
1426    ) -> Option<PeerId> {
1427        for (leader_id, states_by_pane) in &mut self.follower_states_by_leader {
1428            let leader_id = *leader_id;
1429            if let Some(state) = states_by_pane.remove(&pane) {
1430                for (_, item) in state.items_by_leader_view_id {
1431                    if let FollowerItem::Loaded(item) = item {
1432                        item.set_leader_replica_id(None, cx);
1433                    }
1434                }
1435
1436                if states_by_pane.is_empty() {
1437                    self.follower_states_by_leader.remove(&leader_id);
1438                    if let Some(project_id) = self.project.read(cx).remote_id() {
1439                        self.client
1440                            .send(proto::Unfollow {
1441                                project_id,
1442                                leader_id: leader_id.0,
1443                            })
1444                            .log_err();
1445                    }
1446                }
1447
1448                cx.notify();
1449                return Some(leader_id);
1450            }
1451        }
1452        None
1453    }
1454
1455    fn render_connection_status(&self, cx: &mut RenderContext<Self>) -> Option<ElementBox> {
1456        let theme = &cx.global::<Settings>().theme;
1457        match &*self.client.status().borrow() {
1458            client::Status::ConnectionError
1459            | client::Status::ConnectionLost
1460            | client::Status::Reauthenticating
1461            | client::Status::Reconnecting { .. }
1462            | client::Status::ReconnectionError { .. } => Some(
1463                Container::new(
1464                    Align::new(
1465                        ConstrainedBox::new(
1466                            Svg::new("icons/offline-14.svg")
1467                                .with_color(theme.workspace.titlebar.offline_icon.color)
1468                                .boxed(),
1469                        )
1470                        .with_width(theme.workspace.titlebar.offline_icon.width)
1471                        .boxed(),
1472                    )
1473                    .boxed(),
1474                )
1475                .with_style(theme.workspace.titlebar.offline_icon.container)
1476                .boxed(),
1477            ),
1478            client::Status::UpgradeRequired => Some(
1479                Label::new(
1480                    "Please update Zed to collaborate".to_string(),
1481                    theme.workspace.titlebar.outdated_warning.text.clone(),
1482                )
1483                .contained()
1484                .with_style(theme.workspace.titlebar.outdated_warning.container)
1485                .aligned()
1486                .boxed(),
1487            ),
1488            _ => None,
1489        }
1490    }
1491
1492    fn render_titlebar(&self, theme: &Theme, cx: &mut RenderContext<Self>) -> ElementBox {
1493        let mut worktree_root_names = String::new();
1494        {
1495            let mut worktrees = self.project.read(cx).visible_worktrees(cx).peekable();
1496            while let Some(worktree) = worktrees.next() {
1497                worktree_root_names.push_str(worktree.read(cx).root_name());
1498                if worktrees.peek().is_some() {
1499                    worktree_root_names.push_str(", ");
1500                }
1501            }
1502        }
1503
1504        ConstrainedBox::new(
1505            Container::new(
1506                Stack::new()
1507                    .with_child(
1508                        Label::new(worktree_root_names, theme.workspace.titlebar.title.clone())
1509                            .aligned()
1510                            .left()
1511                            .boxed(),
1512                    )
1513                    .with_child(
1514                        Align::new(
1515                            Flex::row()
1516                                .with_children(self.render_collaborators(theme, cx))
1517                                .with_children(self.render_current_user(
1518                                    self.user_store.read(cx).current_user().as_ref(),
1519                                    self.project.read(cx).replica_id(),
1520                                    theme,
1521                                    cx,
1522                                ))
1523                                .with_children(self.render_connection_status(cx))
1524                                .with_children(self.render_share_icon(theme, cx))
1525                                .boxed(),
1526                        )
1527                        .right()
1528                        .boxed(),
1529                    )
1530                    .boxed(),
1531            )
1532            .with_style(theme.workspace.titlebar.container)
1533            .boxed(),
1534        )
1535        .with_height(theme.workspace.titlebar.height)
1536        .named("titlebar")
1537    }
1538
1539    fn render_collaborators(&self, theme: &Theme, cx: &mut RenderContext<Self>) -> Vec<ElementBox> {
1540        let mut collaborators = self
1541            .project
1542            .read(cx)
1543            .collaborators()
1544            .values()
1545            .cloned()
1546            .collect::<Vec<_>>();
1547        collaborators.sort_unstable_by_key(|collaborator| collaborator.replica_id);
1548        collaborators
1549            .into_iter()
1550            .filter_map(|collaborator| {
1551                Some(self.render_avatar(
1552                    collaborator.user.avatar.clone()?,
1553                    collaborator.replica_id,
1554                    Some(collaborator.peer_id),
1555                    theme,
1556                    cx,
1557                ))
1558            })
1559            .collect()
1560    }
1561
1562    fn render_current_user(
1563        &self,
1564        user: Option<&Arc<User>>,
1565        replica_id: ReplicaId,
1566        theme: &Theme,
1567        cx: &mut RenderContext<Self>,
1568    ) -> Option<ElementBox> {
1569        let status = *self.client.status().borrow();
1570        if let Some(avatar) = user.and_then(|user| user.avatar.clone()) {
1571            Some(self.render_avatar(avatar, replica_id, None, theme, cx))
1572        } else if matches!(status, client::Status::UpgradeRequired) {
1573            None
1574        } else {
1575            Some(
1576                MouseEventHandler::new::<Authenticate, _, _>(0, cx, |state, _| {
1577                    let style = theme
1578                        .workspace
1579                        .titlebar
1580                        .sign_in_prompt
1581                        .style_for(state, false);
1582                    Label::new("Sign in".to_string(), style.text.clone())
1583                        .contained()
1584                        .with_style(style.container)
1585                        .boxed()
1586                })
1587                .on_click(|cx| cx.dispatch_action(Authenticate))
1588                .with_cursor_style(CursorStyle::PointingHand)
1589                .aligned()
1590                .boxed(),
1591            )
1592        }
1593    }
1594
1595    fn render_avatar(
1596        &self,
1597        avatar: Arc<ImageData>,
1598        replica_id: ReplicaId,
1599        peer_id: Option<PeerId>,
1600        theme: &Theme,
1601        cx: &mut RenderContext<Self>,
1602    ) -> ElementBox {
1603        let replica_color = theme.editor.replica_selection_style(replica_id).cursor;
1604        let is_followed = peer_id.map_or(false, |peer_id| {
1605            self.follower_states_by_leader.contains_key(&peer_id)
1606        });
1607        let mut avatar_style = theme.workspace.titlebar.avatar;
1608        if is_followed {
1609            avatar_style.border = Border::all(1.0, replica_color);
1610        }
1611        let content = Stack::new()
1612            .with_child(
1613                Image::new(avatar)
1614                    .with_style(avatar_style)
1615                    .constrained()
1616                    .with_width(theme.workspace.titlebar.avatar_width)
1617                    .aligned()
1618                    .boxed(),
1619            )
1620            .with_child(
1621                AvatarRibbon::new(replica_color)
1622                    .constrained()
1623                    .with_width(theme.workspace.titlebar.avatar_ribbon.width)
1624                    .with_height(theme.workspace.titlebar.avatar_ribbon.height)
1625                    .aligned()
1626                    .bottom()
1627                    .boxed(),
1628            )
1629            .constrained()
1630            .with_width(theme.workspace.titlebar.avatar_width)
1631            .contained()
1632            .with_margin_left(theme.workspace.titlebar.avatar_margin)
1633            .boxed();
1634
1635        if let Some(peer_id) = peer_id {
1636            MouseEventHandler::new::<ToggleFollow, _, _>(replica_id.into(), cx, move |_, _| content)
1637                .with_cursor_style(CursorStyle::PointingHand)
1638                .on_click(move |cx| cx.dispatch_action(ToggleFollow(peer_id)))
1639                .boxed()
1640        } else {
1641            content
1642        }
1643    }
1644
1645    fn render_share_icon(&self, theme: &Theme, cx: &mut RenderContext<Self>) -> Option<ElementBox> {
1646        if self.project().read(cx).is_local()
1647            && self.client.user_id().is_some()
1648            && self.project().read(cx).can_share(cx)
1649        {
1650            Some(
1651                MouseEventHandler::new::<ToggleShare, _, _>(0, cx, |state, cx| {
1652                    let style = &theme
1653                        .workspace
1654                        .titlebar
1655                        .share_icon
1656                        .style_for(state, self.project().read(cx).is_shared());
1657                    Svg::new("icons/share.svg")
1658                        .with_color(style.color)
1659                        .constrained()
1660                        .with_height(14.)
1661                        .aligned()
1662                        .contained()
1663                        .with_style(style.container)
1664                        .constrained()
1665                        .with_width(24.)
1666                        .aligned()
1667                        .boxed()
1668                })
1669                .with_cursor_style(CursorStyle::PointingHand)
1670                .on_click(|cx| cx.dispatch_action(ToggleShare))
1671                .boxed(),
1672            )
1673        } else {
1674            None
1675        }
1676    }
1677
1678    fn render_disconnected_overlay(&self, cx: &AppContext) -> Option<ElementBox> {
1679        if self.project.read(cx).is_read_only() {
1680            let theme = &cx.global::<Settings>().theme;
1681            Some(
1682                EventHandler::new(
1683                    Label::new(
1684                        "Your connection to the remote project has been lost.".to_string(),
1685                        theme.workspace.disconnected_overlay.text.clone(),
1686                    )
1687                    .aligned()
1688                    .contained()
1689                    .with_style(theme.workspace.disconnected_overlay.container)
1690                    .boxed(),
1691                )
1692                .capture(|_, _, _| true)
1693                .boxed(),
1694            )
1695        } else {
1696            None
1697        }
1698    }
1699
1700    // RPC handlers
1701
1702    async fn handle_follow(
1703        this: ViewHandle<Self>,
1704        envelope: TypedEnvelope<proto::Follow>,
1705        _: Arc<Client>,
1706        mut cx: AsyncAppContext,
1707    ) -> Result<proto::FollowResponse> {
1708        this.update(&mut cx, |this, cx| {
1709            this.leader_state
1710                .followers
1711                .insert(envelope.original_sender_id()?);
1712
1713            let active_view_id = this
1714                .active_item(cx)
1715                .and_then(|i| i.to_followable_item_handle(cx))
1716                .map(|i| i.id() as u64);
1717            Ok(proto::FollowResponse {
1718                active_view_id,
1719                views: this
1720                    .panes()
1721                    .iter()
1722                    .flat_map(|pane| {
1723                        let leader_id = this.leader_for_pane(pane).map(|id| id.0);
1724                        pane.read(cx).items().filter_map({
1725                            let cx = &cx;
1726                            move |item| {
1727                                let id = item.id() as u64;
1728                                let item = item.to_followable_item_handle(cx)?;
1729                                let variant = item.to_state_proto(cx)?;
1730                                Some(proto::View {
1731                                    id,
1732                                    leader_id,
1733                                    variant: Some(variant),
1734                                })
1735                            }
1736                        })
1737                    })
1738                    .collect(),
1739            })
1740        })
1741    }
1742
1743    async fn handle_unfollow(
1744        this: ViewHandle<Self>,
1745        envelope: TypedEnvelope<proto::Unfollow>,
1746        _: Arc<Client>,
1747        mut cx: AsyncAppContext,
1748    ) -> Result<()> {
1749        this.update(&mut cx, |this, _| {
1750            this.leader_state
1751                .followers
1752                .remove(&envelope.original_sender_id()?);
1753            Ok(())
1754        })
1755    }
1756
1757    async fn handle_update_followers(
1758        this: ViewHandle<Self>,
1759        envelope: TypedEnvelope<proto::UpdateFollowers>,
1760        _: Arc<Client>,
1761        mut cx: AsyncAppContext,
1762    ) -> Result<()> {
1763        let leader_id = envelope.original_sender_id()?;
1764        match envelope
1765            .payload
1766            .variant
1767            .ok_or_else(|| anyhow!("invalid update"))?
1768        {
1769            proto::update_followers::Variant::UpdateActiveView(update_active_view) => {
1770                this.update(&mut cx, |this, cx| {
1771                    this.update_leader_state(leader_id, cx, |state, _| {
1772                        state.active_view_id = update_active_view.id;
1773                    });
1774                    Ok::<_, anyhow::Error>(())
1775                })
1776            }
1777            proto::update_followers::Variant::UpdateView(update_view) => {
1778                this.update(&mut cx, |this, cx| {
1779                    let variant = update_view
1780                        .variant
1781                        .ok_or_else(|| anyhow!("missing update view variant"))?;
1782                    this.update_leader_state(leader_id, cx, |state, cx| {
1783                        let variant = variant.clone();
1784                        match state
1785                            .items_by_leader_view_id
1786                            .entry(update_view.id)
1787                            .or_insert(FollowerItem::Loading(Vec::new()))
1788                        {
1789                            FollowerItem::Loaded(item) => {
1790                                item.apply_update_proto(variant, cx).log_err();
1791                            }
1792                            FollowerItem::Loading(updates) => updates.push(variant),
1793                        }
1794                    });
1795                    Ok(())
1796                })
1797            }
1798            proto::update_followers::Variant::CreateView(view) => {
1799                let panes = this.read_with(&cx, |this, _| {
1800                    this.follower_states_by_leader
1801                        .get(&leader_id)
1802                        .into_iter()
1803                        .flat_map(|states_by_pane| states_by_pane.keys())
1804                        .cloned()
1805                        .collect()
1806                });
1807                Self::add_views_from_leader(this.clone(), leader_id, panes, vec![view], &mut cx)
1808                    .await?;
1809                Ok(())
1810            }
1811        }
1812        .log_err();
1813
1814        Ok(())
1815    }
1816
1817    async fn add_views_from_leader(
1818        this: ViewHandle<Self>,
1819        leader_id: PeerId,
1820        panes: Vec<ViewHandle<Pane>>,
1821        views: Vec<proto::View>,
1822        cx: &mut AsyncAppContext,
1823    ) -> Result<()> {
1824        let project = this.read_with(cx, |this, _| this.project.clone());
1825        let replica_id = project
1826            .read_with(cx, |project, _| {
1827                project
1828                    .collaborators()
1829                    .get(&leader_id)
1830                    .map(|c| c.replica_id)
1831            })
1832            .ok_or_else(|| anyhow!("no such collaborator {}", leader_id))?;
1833
1834        let item_builders = cx.update(|cx| {
1835            cx.default_global::<FollowableItemBuilders>()
1836                .values()
1837                .map(|b| b.0)
1838                .collect::<Vec<_>>()
1839                .clone()
1840        });
1841
1842        let mut item_tasks_by_pane = HashMap::default();
1843        for pane in panes {
1844            let mut item_tasks = Vec::new();
1845            let mut leader_view_ids = Vec::new();
1846            for view in &views {
1847                let mut variant = view.variant.clone();
1848                if variant.is_none() {
1849                    Err(anyhow!("missing variant"))?;
1850                }
1851                for build_item in &item_builders {
1852                    let task =
1853                        cx.update(|cx| build_item(pane.clone(), project.clone(), &mut variant, cx));
1854                    if let Some(task) = task {
1855                        item_tasks.push(task);
1856                        leader_view_ids.push(view.id);
1857                        break;
1858                    } else {
1859                        assert!(variant.is_some());
1860                    }
1861                }
1862            }
1863
1864            item_tasks_by_pane.insert(pane, (item_tasks, leader_view_ids));
1865        }
1866
1867        for (pane, (item_tasks, leader_view_ids)) in item_tasks_by_pane {
1868            let items = futures::future::try_join_all(item_tasks).await?;
1869            this.update(cx, |this, cx| {
1870                let state = this
1871                    .follower_states_by_leader
1872                    .get_mut(&leader_id)?
1873                    .get_mut(&pane)?;
1874
1875                for (id, item) in leader_view_ids.into_iter().zip(items) {
1876                    item.set_leader_replica_id(Some(replica_id), cx);
1877                    match state.items_by_leader_view_id.entry(id) {
1878                        hash_map::Entry::Occupied(e) => {
1879                            let e = e.into_mut();
1880                            if let FollowerItem::Loading(updates) = e {
1881                                for update in updates.drain(..) {
1882                                    item.apply_update_proto(update, cx)
1883                                        .context("failed to apply view update")
1884                                        .log_err();
1885                                }
1886                            }
1887                            *e = FollowerItem::Loaded(item);
1888                        }
1889                        hash_map::Entry::Vacant(e) => {
1890                            e.insert(FollowerItem::Loaded(item));
1891                        }
1892                    }
1893                }
1894
1895                Some(())
1896            });
1897        }
1898        this.update(cx, |this, cx| this.leader_updated(leader_id, cx));
1899
1900        Ok(())
1901    }
1902
1903    fn update_followers(
1904        &self,
1905        update: proto::update_followers::Variant,
1906        cx: &AppContext,
1907    ) -> Option<()> {
1908        let project_id = self.project.read(cx).remote_id()?;
1909        if !self.leader_state.followers.is_empty() {
1910            self.client
1911                .send(proto::UpdateFollowers {
1912                    project_id,
1913                    follower_ids: self.leader_state.followers.iter().map(|f| f.0).collect(),
1914                    variant: Some(update),
1915                })
1916                .log_err();
1917        }
1918        None
1919    }
1920
1921    pub fn leader_for_pane(&self, pane: &ViewHandle<Pane>) -> Option<PeerId> {
1922        self.follower_states_by_leader
1923            .iter()
1924            .find_map(|(leader_id, state)| {
1925                if state.contains_key(pane) {
1926                    Some(*leader_id)
1927                } else {
1928                    None
1929                }
1930            })
1931    }
1932
1933    fn update_leader_state(
1934        &mut self,
1935        leader_id: PeerId,
1936        cx: &mut ViewContext<Self>,
1937        mut update_fn: impl FnMut(&mut FollowerState, &mut ViewContext<Self>),
1938    ) {
1939        for (_, state) in self
1940            .follower_states_by_leader
1941            .get_mut(&leader_id)
1942            .into_iter()
1943            .flatten()
1944        {
1945            update_fn(state, cx);
1946        }
1947        self.leader_updated(leader_id, cx);
1948    }
1949
1950    fn leader_updated(&mut self, leader_id: PeerId, cx: &mut ViewContext<Self>) -> Option<()> {
1951        let mut items_to_add = Vec::new();
1952        for (pane, state) in self.follower_states_by_leader.get(&leader_id)? {
1953            if let Some(active_item) = state
1954                .active_view_id
1955                .and_then(|id| state.items_by_leader_view_id.get(&id))
1956            {
1957                if let FollowerItem::Loaded(item) = active_item {
1958                    items_to_add.push((pane.clone(), item.boxed_clone()));
1959                }
1960            }
1961        }
1962
1963        for (pane, item) in items_to_add {
1964            Pane::add_item(self, pane.clone(), item.boxed_clone(), false, cx);
1965            if pane == self.active_pane {
1966                pane.update(cx, |pane, cx| pane.focus_active_item(cx));
1967            }
1968            cx.notify();
1969        }
1970        None
1971    }
1972}
1973
1974impl Entity for Workspace {
1975    type Event = Event;
1976}
1977
1978impl View for Workspace {
1979    fn ui_name() -> &'static str {
1980        "Workspace"
1981    }
1982
1983    fn render(&mut self, cx: &mut RenderContext<Self>) -> ElementBox {
1984        let theme = cx.global::<Settings>().theme.clone();
1985        Stack::new()
1986            .with_child(
1987                Flex::column()
1988                    .with_child(self.render_titlebar(&theme, cx))
1989                    .with_child(
1990                        Stack::new()
1991                            .with_child({
1992                                Flex::row()
1993                                    .with_children(
1994                                        if self.left_sidebar.read(cx).active_item().is_some() {
1995                                            Some(
1996                                                ChildView::new(&self.left_sidebar)
1997                                                    .flex(0.8, false)
1998                                                    .boxed(),
1999                                            )
2000                                        } else {
2001                                            None
2002                                        },
2003                                    )
2004                                    .with_child(
2005                                        FlexItem::new(self.center.render(
2006                                            &theme,
2007                                            &self.follower_states_by_leader,
2008                                            self.project.read(cx).collaborators(),
2009                                        ))
2010                                        .flex(1., true)
2011                                        .boxed(),
2012                                    )
2013                                    .with_children(
2014                                        if self.right_sidebar.read(cx).active_item().is_some() {
2015                                            Some(
2016                                                ChildView::new(&self.right_sidebar)
2017                                                    .flex(0.8, false)
2018                                                    .boxed(),
2019                                            )
2020                                        } else {
2021                                            None
2022                                        },
2023                                    )
2024                                    .boxed()
2025                            })
2026                            .with_children(self.modal.as_ref().map(|m| {
2027                                ChildView::new(m)
2028                                    .contained()
2029                                    .with_style(theme.workspace.modal)
2030                                    .aligned()
2031                                    .top()
2032                                    .boxed()
2033                            }))
2034                            .flex(1.0, true)
2035                            .boxed(),
2036                    )
2037                    .with_child(ChildView::new(&self.status_bar).boxed())
2038                    .contained()
2039                    .with_background_color(theme.workspace.background)
2040                    .boxed(),
2041            )
2042            .with_children(self.render_disconnected_overlay(cx))
2043            .named("workspace")
2044    }
2045
2046    fn on_focus(&mut self, cx: &mut ViewContext<Self>) {
2047        cx.focus(&self.active_pane);
2048    }
2049}
2050
2051pub trait WorkspaceHandle {
2052    fn file_project_paths(&self, cx: &AppContext) -> Vec<ProjectPath>;
2053}
2054
2055impl WorkspaceHandle for ViewHandle<Workspace> {
2056    fn file_project_paths(&self, cx: &AppContext) -> Vec<ProjectPath> {
2057        self.read(cx)
2058            .worktrees(cx)
2059            .flat_map(|worktree| {
2060                let worktree_id = worktree.read(cx).id();
2061                worktree.read(cx).files(true, 0).map(move |f| ProjectPath {
2062                    worktree_id,
2063                    path: f.path.clone(),
2064                })
2065            })
2066            .collect::<Vec<_>>()
2067    }
2068}
2069
2070pub struct AvatarRibbon {
2071    color: Color,
2072}
2073
2074impl AvatarRibbon {
2075    pub fn new(color: Color) -> AvatarRibbon {
2076        AvatarRibbon { color }
2077    }
2078}
2079
2080impl Element for AvatarRibbon {
2081    type LayoutState = ();
2082
2083    type PaintState = ();
2084
2085    fn layout(
2086        &mut self,
2087        constraint: gpui::SizeConstraint,
2088        _: &mut gpui::LayoutContext,
2089    ) -> (gpui::geometry::vector::Vector2F, Self::LayoutState) {
2090        (constraint.max, ())
2091    }
2092
2093    fn paint(
2094        &mut self,
2095        bounds: gpui::geometry::rect::RectF,
2096        _: gpui::geometry::rect::RectF,
2097        _: &mut Self::LayoutState,
2098        cx: &mut gpui::PaintContext,
2099    ) -> Self::PaintState {
2100        let mut path = PathBuilder::new();
2101        path.reset(bounds.lower_left());
2102        path.curve_to(
2103            bounds.origin() + vec2f(bounds.height(), 0.),
2104            bounds.origin(),
2105        );
2106        path.line_to(bounds.upper_right() - vec2f(bounds.height(), 0.));
2107        path.curve_to(bounds.lower_right(), bounds.upper_right());
2108        path.line_to(bounds.lower_left());
2109        cx.scene.push_path(path.build(self.color, None));
2110    }
2111
2112    fn dispatch_event(
2113        &mut self,
2114        _: &gpui::Event,
2115        _: RectF,
2116        _: RectF,
2117        _: &mut Self::LayoutState,
2118        _: &mut Self::PaintState,
2119        _: &mut gpui::EventContext,
2120    ) -> bool {
2121        false
2122    }
2123
2124    fn debug(
2125        &self,
2126        bounds: gpui::geometry::rect::RectF,
2127        _: &Self::LayoutState,
2128        _: &Self::PaintState,
2129        _: &gpui::DebugContext,
2130    ) -> gpui::json::Value {
2131        json::json!({
2132            "type": "AvatarRibbon",
2133            "bounds": bounds.to_json(),
2134            "color": self.color.to_json(),
2135        })
2136    }
2137}
2138
2139impl std::fmt::Debug for OpenPaths {
2140    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
2141        f.debug_struct("OpenPaths")
2142            .field("paths", &self.paths)
2143            .finish()
2144    }
2145}
2146
2147fn open(action: &Open, cx: &mut MutableAppContext) {
2148    let app_state = action.0.clone();
2149    let mut paths = cx.prompt_for_paths(PathPromptOptions {
2150        files: true,
2151        directories: true,
2152        multiple: true,
2153    });
2154    cx.spawn(|mut cx| async move {
2155        if let Some(paths) = paths.recv().await.flatten() {
2156            cx.update(|cx| cx.dispatch_global_action(OpenPaths { paths, app_state }));
2157        }
2158    })
2159    .detach();
2160}
2161
2162pub struct WorkspaceCreated(WeakViewHandle<Workspace>);
2163
2164pub fn open_paths(
2165    abs_paths: &[PathBuf],
2166    app_state: &Arc<AppState>,
2167    cx: &mut MutableAppContext,
2168) -> Task<(
2169    ViewHandle<Workspace>,
2170    Vec<Option<Result<Box<dyn ItemHandle>, Arc<anyhow::Error>>>>,
2171)> {
2172    log::info!("open paths {:?}", abs_paths);
2173
2174    // Open paths in existing workspace if possible
2175    let mut existing = None;
2176    for window_id in cx.window_ids().collect::<Vec<_>>() {
2177        if let Some(workspace_handle) = cx.root_view::<Workspace>(window_id) {
2178            if workspace_handle.update(cx, |workspace, cx| {
2179                if workspace.contains_paths(abs_paths, cx.as_ref()) {
2180                    cx.activate_window(window_id);
2181                    existing = Some(workspace_handle.clone());
2182                    true
2183                } else {
2184                    false
2185                }
2186            }) {
2187                break;
2188            }
2189        }
2190    }
2191
2192    let app_state = app_state.clone();
2193    let abs_paths = abs_paths.to_vec();
2194    cx.spawn(|mut cx| async move {
2195        let workspace = if let Some(existing) = existing {
2196            existing
2197        } else {
2198            let contains_directory =
2199                futures::future::join_all(abs_paths.iter().map(|path| app_state.fs.is_file(path)))
2200                    .await
2201                    .contains(&false);
2202
2203            cx.add_window((app_state.build_window_options)(), |cx| {
2204                let project = Project::local(
2205                    app_state.client.clone(),
2206                    app_state.user_store.clone(),
2207                    app_state.languages.clone(),
2208                    app_state.fs.clone(),
2209                    cx,
2210                );
2211                let mut workspace = (app_state.build_workspace)(project, &app_state, cx);
2212                if contains_directory {
2213                    workspace.toggle_sidebar_item(
2214                        &ToggleSidebarItem {
2215                            side: Side::Left,
2216                            item_index: 0,
2217                        },
2218                        cx,
2219                    );
2220                }
2221                workspace
2222            })
2223            .1
2224        };
2225
2226        let items = workspace
2227            .update(&mut cx, |workspace, cx| workspace.open_paths(abs_paths, cx))
2228            .await;
2229        (workspace, items)
2230    })
2231}
2232
2233pub fn join_project(
2234    project_id: u64,
2235    app_state: &Arc<AppState>,
2236    cx: &mut MutableAppContext,
2237) -> Task<Result<ViewHandle<Workspace>>> {
2238    for window_id in cx.window_ids().collect::<Vec<_>>() {
2239        if let Some(workspace) = cx.root_view::<Workspace>(window_id) {
2240            if workspace.read(cx).project().read(cx).remote_id() == Some(project_id) {
2241                return Task::ready(Ok(workspace));
2242            }
2243        }
2244    }
2245
2246    let app_state = app_state.clone();
2247    cx.spawn(|mut cx| async move {
2248        let project = Project::remote(
2249            project_id,
2250            app_state.client.clone(),
2251            app_state.user_store.clone(),
2252            app_state.languages.clone(),
2253            app_state.fs.clone(),
2254            &mut cx,
2255        )
2256        .await?;
2257        Ok(cx.update(|cx| {
2258            cx.add_window((app_state.build_window_options)(), |cx| {
2259                (app_state.build_workspace)(project, &app_state, cx)
2260            })
2261            .1
2262        }))
2263    })
2264}
2265
2266fn open_new(app_state: &Arc<AppState>, cx: &mut MutableAppContext) {
2267    let (window_id, workspace) = cx.add_window((app_state.build_window_options)(), |cx| {
2268        let project = Project::local(
2269            app_state.client.clone(),
2270            app_state.user_store.clone(),
2271            app_state.languages.clone(),
2272            app_state.fs.clone(),
2273            cx,
2274        );
2275        (app_state.build_workspace)(project, &app_state, cx)
2276    });
2277    cx.dispatch_action(window_id, vec![workspace.id()], &OpenNew(app_state.clone()));
2278}