1mod ignore;
   2mod lsp_command;
   3pub mod search;
   4pub mod worktree;
   5
   6#[cfg(test)]
   7mod project_tests;
   8
   9use anyhow::{anyhow, Context, Result};
  10use client::{proto, Client, PeerId, TypedEnvelope, UserStore};
  11use clock::ReplicaId;
  12use collections::{hash_map, BTreeMap, HashMap, HashSet};
  13use futures::{future::Shared, AsyncWriteExt, Future, FutureExt, StreamExt, TryFutureExt};
  14
  15use gpui::{
  16    AnyModelHandle, AppContext, AsyncAppContext, Entity, ModelContext, ModelHandle,
  17    MutableAppContext, Task, UpgradeModelHandle, WeakModelHandle,
  18};
  19use language::{
  20    point_to_lsp,
  21    proto::{
  22        deserialize_anchor, deserialize_line_ending, deserialize_version, serialize_anchor,
  23        serialize_version,
  24    },
  25    range_from_lsp, range_to_lsp, Anchor, Bias, Buffer, CachedLspAdapter, CharKind, CodeAction,
  26    CodeLabel, Completion, Diagnostic, DiagnosticEntry, DiagnosticSet, Event as BufferEvent,
  27    File as _, Language, LanguageRegistry, LanguageServerName, LocalFile, OffsetRangeExt,
  28    Operation, Patch, PointUtf16, TextBufferSnapshot, ToOffset, ToOffsetClamped, ToPointUtf16,
  29    Transaction,
  30};
  31use lsp::{
  32    DiagnosticSeverity, DiagnosticTag, DocumentHighlightKind, LanguageServer, LanguageString,
  33    MarkedString,
  34};
  35use lsp_command::*;
  36use parking_lot::Mutex;
  37use postage::watch;
  38use rand::prelude::*;
  39use search::SearchQuery;
  40use serde::Serialize;
  41use settings::{FormatOnSave, Formatter, Settings};
  42use sha2::{Digest, Sha256};
  43use similar::{ChangeTag, TextDiff};
  44use std::{
  45    cell::RefCell,
  46    cmp::{self, Ordering},
  47    convert::TryInto,
  48    ffi::OsString,
  49    hash::Hash,
  50    mem,
  51    num::NonZeroU32,
  52    ops::Range,
  53    os::unix::{ffi::OsStrExt, prelude::OsStringExt},
  54    path::{Component, Path, PathBuf},
  55    rc::Rc,
  56    str,
  57    sync::{
  58        atomic::{AtomicUsize, Ordering::SeqCst},
  59        Arc,
  60    },
  61    time::Instant,
  62};
  63use thiserror::Error;
  64use util::{defer, post_inc, ResultExt, TryFutureExt as _};
  65
  66pub use db::Db;
  67pub use fs::*;
  68pub use worktree::*;
  69
  70pub trait Item: Entity {
  71    fn entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId>;
  72}
  73
  74pub struct ProjectStore {
  75    projects: Vec<WeakModelHandle<Project>>,
  76}
  77
  78// Language server state is stored across 3 collections:
  79//     language_servers =>
  80//         a mapping from unique server id to LanguageServerState which can either be a task for a
  81//         server in the process of starting, or a running server with adapter and language server arcs
  82//     language_server_ids => a mapping from worktreeId and server name to the unique server id
  83//     language_server_statuses => a mapping from unique server id to the current server status
  84//
  85// Multiple worktrees can map to the same language server for example when you jump to the definition
  86// of a file in the standard library. So language_server_ids is used to look up which server is active
  87// for a given worktree and language server name
  88//
  89// When starting a language server, first the id map is checked to make sure a server isn't already available
  90// for that worktree. If there is one, it finishes early. Otherwise, a new id is allocated and and
  91// the Starting variant of LanguageServerState is stored in the language_servers map.
  92pub struct Project {
  93    worktrees: Vec<WorktreeHandle>,
  94    active_entry: Option<ProjectEntryId>,
  95    languages: Arc<LanguageRegistry>,
  96    language_servers: HashMap<usize, LanguageServerState>,
  97    language_server_ids: HashMap<(WorktreeId, LanguageServerName), usize>,
  98    language_server_statuses: BTreeMap<usize, LanguageServerStatus>,
  99    language_server_settings: Arc<Mutex<serde_json::Value>>,
 100    last_workspace_edits_by_language_server: HashMap<usize, ProjectTransaction>,
 101    next_language_server_id: usize,
 102    client: Arc<client::Client>,
 103    next_entry_id: Arc<AtomicUsize>,
 104    next_diagnostic_group_id: usize,
 105    user_store: ModelHandle<UserStore>,
 106    project_store: ModelHandle<ProjectStore>,
 107    fs: Arc<dyn Fs>,
 108    client_state: Option<ProjectClientState>,
 109    collaborators: HashMap<PeerId, Collaborator>,
 110    client_subscriptions: Vec<client::Subscription>,
 111    _subscriptions: Vec<gpui::Subscription>,
 112    opened_buffer: (watch::Sender<()>, watch::Receiver<()>),
 113    shared_buffers: HashMap<PeerId, HashSet<u64>>,
 114    #[allow(clippy::type_complexity)]
 115    loading_buffers: HashMap<
 116        ProjectPath,
 117        postage::watch::Receiver<Option<Result<ModelHandle<Buffer>, Arc<anyhow::Error>>>>,
 118    >,
 119    #[allow(clippy::type_complexity)]
 120    loading_local_worktrees:
 121        HashMap<Arc<Path>, Shared<Task<Result<ModelHandle<Worktree>, Arc<anyhow::Error>>>>>,
 122    opened_buffers: HashMap<u64, OpenBuffer>,
 123    incomplete_buffers: HashMap<u64, ModelHandle<Buffer>>,
 124    buffer_snapshots: HashMap<u64, Vec<(i32, TextBufferSnapshot)>>,
 125    buffers_being_formatted: HashSet<usize>,
 126    nonce: u128,
 127    _maintain_buffer_languages: Task<()>,
 128}
 129
 130#[derive(Error, Debug)]
 131pub enum JoinProjectError {
 132    #[error("host declined join request")]
 133    HostDeclined,
 134    #[error("host closed the project")]
 135    HostClosedProject,
 136    #[error("host went offline")]
 137    HostWentOffline,
 138    #[error("{0}")]
 139    Other(#[from] anyhow::Error),
 140}
 141
 142enum OpenBuffer {
 143    Strong(ModelHandle<Buffer>),
 144    Weak(WeakModelHandle<Buffer>),
 145    Operations(Vec<Operation>),
 146}
 147
 148enum WorktreeHandle {
 149    Strong(ModelHandle<Worktree>),
 150    Weak(WeakModelHandle<Worktree>),
 151}
 152
 153enum ProjectClientState {
 154    Local {
 155        remote_id: u64,
 156        _detect_unshare: Task<Option<()>>,
 157    },
 158    Remote {
 159        sharing_has_stopped: bool,
 160        remote_id: u64,
 161        replica_id: ReplicaId,
 162        _detect_unshare: Task<Option<()>>,
 163    },
 164}
 165
 166#[derive(Clone, Debug)]
 167pub struct Collaborator {
 168    pub peer_id: PeerId,
 169    pub replica_id: ReplicaId,
 170}
 171
 172#[derive(Clone, Debug, PartialEq, Eq)]
 173pub enum Event {
 174    ActiveEntryChanged(Option<ProjectEntryId>),
 175    WorktreeAdded,
 176    WorktreeRemoved(WorktreeId),
 177    DiskBasedDiagnosticsStarted {
 178        language_server_id: usize,
 179    },
 180    DiskBasedDiagnosticsFinished {
 181        language_server_id: usize,
 182    },
 183    DiagnosticsUpdated {
 184        path: ProjectPath,
 185        language_server_id: usize,
 186    },
 187    RemoteIdChanged(Option<u64>),
 188    DisconnectedFromHost,
 189    CollaboratorLeft(PeerId),
 190}
 191
 192pub enum LanguageServerState {
 193    Starting(Task<Option<Arc<LanguageServer>>>),
 194    Running {
 195        language: Arc<Language>,
 196        adapter: Arc<CachedLspAdapter>,
 197        server: Arc<LanguageServer>,
 198    },
 199}
 200
 201#[derive(Serialize)]
 202pub struct LanguageServerStatus {
 203    pub name: String,
 204    pub pending_work: BTreeMap<String, LanguageServerProgress>,
 205    pub has_pending_diagnostic_updates: bool,
 206    progress_tokens: HashSet<String>,
 207}
 208
 209#[derive(Clone, Debug, Serialize)]
 210pub struct LanguageServerProgress {
 211    pub message: Option<String>,
 212    pub percentage: Option<usize>,
 213    #[serde(skip_serializing)]
 214    pub last_update_at: Instant,
 215}
 216
 217#[derive(Clone, Debug, Eq, PartialEq, Hash, PartialOrd, Ord)]
 218pub struct ProjectPath {
 219    pub worktree_id: WorktreeId,
 220    pub path: Arc<Path>,
 221}
 222
 223#[derive(Copy, Clone, Debug, Default, PartialEq, Serialize)]
 224pub struct DiagnosticSummary {
 225    pub language_server_id: usize,
 226    pub error_count: usize,
 227    pub warning_count: usize,
 228}
 229
 230#[derive(Debug, Clone)]
 231pub struct Location {
 232    pub buffer: ModelHandle<Buffer>,
 233    pub range: Range<language::Anchor>,
 234}
 235
 236#[derive(Debug, Clone)]
 237pub struct LocationLink {
 238    pub origin: Option<Location>,
 239    pub target: Location,
 240}
 241
 242#[derive(Debug)]
 243pub struct DocumentHighlight {
 244    pub range: Range<language::Anchor>,
 245    pub kind: DocumentHighlightKind,
 246}
 247
 248#[derive(Clone, Debug)]
 249pub struct Symbol {
 250    pub language_server_name: LanguageServerName,
 251    pub source_worktree_id: WorktreeId,
 252    pub path: ProjectPath,
 253    pub label: CodeLabel,
 254    pub name: String,
 255    pub kind: lsp::SymbolKind,
 256    pub range: Range<PointUtf16>,
 257    pub signature: [u8; 32],
 258}
 259
 260#[derive(Clone, Debug, PartialEq)]
 261pub struct HoverBlock {
 262    pub text: String,
 263    pub language: Option<String>,
 264}
 265
 266impl HoverBlock {
 267    fn try_new(marked_string: MarkedString) -> Option<Self> {
 268        let result = match marked_string {
 269            MarkedString::LanguageString(LanguageString { language, value }) => HoverBlock {
 270                text: value,
 271                language: Some(language),
 272            },
 273            MarkedString::String(text) => HoverBlock {
 274                text,
 275                language: None,
 276            },
 277        };
 278        if result.text.is_empty() {
 279            None
 280        } else {
 281            Some(result)
 282        }
 283    }
 284}
 285
 286#[derive(Debug)]
 287pub struct Hover {
 288    pub contents: Vec<HoverBlock>,
 289    pub range: Option<Range<language::Anchor>>,
 290}
 291
 292#[derive(Default)]
 293pub struct ProjectTransaction(pub HashMap<ModelHandle<Buffer>, language::Transaction>);
 294
 295impl DiagnosticSummary {
 296    fn new<'a, T: 'a>(
 297        language_server_id: usize,
 298        diagnostics: impl IntoIterator<Item = &'a DiagnosticEntry<T>>,
 299    ) -> Self {
 300        let mut this = Self {
 301            language_server_id,
 302            error_count: 0,
 303            warning_count: 0,
 304        };
 305
 306        for entry in diagnostics {
 307            if entry.diagnostic.is_primary {
 308                match entry.diagnostic.severity {
 309                    DiagnosticSeverity::ERROR => this.error_count += 1,
 310                    DiagnosticSeverity::WARNING => this.warning_count += 1,
 311                    _ => {}
 312                }
 313            }
 314        }
 315
 316        this
 317    }
 318
 319    pub fn is_empty(&self) -> bool {
 320        self.error_count == 0 && self.warning_count == 0
 321    }
 322
 323    pub fn to_proto(&self, path: &Path) -> proto::DiagnosticSummary {
 324        proto::DiagnosticSummary {
 325            path: path.to_string_lossy().to_string(),
 326            language_server_id: self.language_server_id as u64,
 327            error_count: self.error_count as u32,
 328            warning_count: self.warning_count as u32,
 329        }
 330    }
 331}
 332
 333#[derive(Clone, Copy, Debug, Default, Hash, PartialEq, Eq, PartialOrd, Ord)]
 334pub struct ProjectEntryId(usize);
 335
 336impl ProjectEntryId {
 337    pub const MAX: Self = Self(usize::MAX);
 338
 339    pub fn new(counter: &AtomicUsize) -> Self {
 340        Self(counter.fetch_add(1, SeqCst))
 341    }
 342
 343    pub fn from_proto(id: u64) -> Self {
 344        Self(id as usize)
 345    }
 346
 347    pub fn to_proto(&self) -> u64 {
 348        self.0 as u64
 349    }
 350
 351    pub fn to_usize(&self) -> usize {
 352        self.0
 353    }
 354}
 355
 356#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 357pub enum FormatTrigger {
 358    Save,
 359    Manual,
 360}
 361
 362impl FormatTrigger {
 363    fn from_proto(value: i32) -> FormatTrigger {
 364        match value {
 365            0 => FormatTrigger::Save,
 366            1 => FormatTrigger::Manual,
 367            _ => FormatTrigger::Save,
 368        }
 369    }
 370}
 371
 372impl Project {
 373    pub fn init(client: &Arc<Client>) {
 374        client.add_model_message_handler(Self::handle_add_collaborator);
 375        client.add_model_message_handler(Self::handle_buffer_reloaded);
 376        client.add_model_message_handler(Self::handle_buffer_saved);
 377        client.add_model_message_handler(Self::handle_start_language_server);
 378        client.add_model_message_handler(Self::handle_update_language_server);
 379        client.add_model_message_handler(Self::handle_remove_collaborator);
 380        client.add_model_message_handler(Self::handle_update_project);
 381        client.add_model_message_handler(Self::handle_unshare_project);
 382        client.add_model_message_handler(Self::handle_create_buffer_for_peer);
 383        client.add_model_message_handler(Self::handle_update_buffer_file);
 384        client.add_model_message_handler(Self::handle_update_buffer);
 385        client.add_model_message_handler(Self::handle_update_diagnostic_summary);
 386        client.add_model_message_handler(Self::handle_update_worktree);
 387        client.add_model_request_handler(Self::handle_create_project_entry);
 388        client.add_model_request_handler(Self::handle_rename_project_entry);
 389        client.add_model_request_handler(Self::handle_copy_project_entry);
 390        client.add_model_request_handler(Self::handle_delete_project_entry);
 391        client.add_model_request_handler(Self::handle_apply_additional_edits_for_completion);
 392        client.add_model_request_handler(Self::handle_apply_code_action);
 393        client.add_model_request_handler(Self::handle_reload_buffers);
 394        client.add_model_request_handler(Self::handle_format_buffers);
 395        client.add_model_request_handler(Self::handle_get_code_actions);
 396        client.add_model_request_handler(Self::handle_get_completions);
 397        client.add_model_request_handler(Self::handle_lsp_command::<GetHover>);
 398        client.add_model_request_handler(Self::handle_lsp_command::<GetDefinition>);
 399        client.add_model_request_handler(Self::handle_lsp_command::<GetTypeDefinition>);
 400        client.add_model_request_handler(Self::handle_lsp_command::<GetDocumentHighlights>);
 401        client.add_model_request_handler(Self::handle_lsp_command::<GetReferences>);
 402        client.add_model_request_handler(Self::handle_lsp_command::<PrepareRename>);
 403        client.add_model_request_handler(Self::handle_lsp_command::<PerformRename>);
 404        client.add_model_request_handler(Self::handle_search_project);
 405        client.add_model_request_handler(Self::handle_get_project_symbols);
 406        client.add_model_request_handler(Self::handle_open_buffer_for_symbol);
 407        client.add_model_request_handler(Self::handle_open_buffer_by_id);
 408        client.add_model_request_handler(Self::handle_open_buffer_by_path);
 409        client.add_model_request_handler(Self::handle_save_buffer);
 410        client.add_model_message_handler(Self::handle_update_diff_base);
 411    }
 412
 413    pub fn local(
 414        client: Arc<Client>,
 415        user_store: ModelHandle<UserStore>,
 416        project_store: ModelHandle<ProjectStore>,
 417        languages: Arc<LanguageRegistry>,
 418        fs: Arc<dyn Fs>,
 419        cx: &mut MutableAppContext,
 420    ) -> ModelHandle<Self> {
 421        cx.add_model(|cx: &mut ModelContext<Self>| {
 422            let handle = cx.weak_handle();
 423            project_store.update(cx, |store, cx| store.add_project(handle, cx));
 424
 425            Self {
 426                worktrees: Default::default(),
 427                collaborators: Default::default(),
 428                opened_buffers: Default::default(),
 429                shared_buffers: Default::default(),
 430                incomplete_buffers: Default::default(),
 431                loading_buffers: Default::default(),
 432                loading_local_worktrees: Default::default(),
 433                buffer_snapshots: Default::default(),
 434                client_state: None,
 435                opened_buffer: watch::channel(),
 436                client_subscriptions: Vec::new(),
 437                _subscriptions: vec![cx.observe_global::<Settings, _>(Self::on_settings_changed)],
 438                _maintain_buffer_languages: Self::maintain_buffer_languages(&languages, cx),
 439                active_entry: None,
 440                languages,
 441                client,
 442                user_store,
 443                project_store,
 444                fs,
 445                next_entry_id: Default::default(),
 446                next_diagnostic_group_id: Default::default(),
 447                language_servers: Default::default(),
 448                language_server_ids: Default::default(),
 449                language_server_statuses: Default::default(),
 450                last_workspace_edits_by_language_server: Default::default(),
 451                language_server_settings: Default::default(),
 452                buffers_being_formatted: Default::default(),
 453                next_language_server_id: 0,
 454                nonce: StdRng::from_entropy().gen(),
 455            }
 456        })
 457    }
 458
 459    pub async fn remote(
 460        remote_id: u64,
 461        client: Arc<Client>,
 462        user_store: ModelHandle<UserStore>,
 463        project_store: ModelHandle<ProjectStore>,
 464        languages: Arc<LanguageRegistry>,
 465        fs: Arc<dyn Fs>,
 466        mut cx: AsyncAppContext,
 467    ) -> Result<ModelHandle<Self>, JoinProjectError> {
 468        client.authenticate_and_connect(true, &cx).await?;
 469
 470        let response = client
 471            .request(proto::JoinProject {
 472                project_id: remote_id,
 473            })
 474            .await?;
 475
 476        let replica_id = response.replica_id as ReplicaId;
 477
 478        let mut worktrees = Vec::new();
 479        for worktree in response.worktrees {
 480            let worktree = cx
 481                .update(|cx| Worktree::remote(remote_id, replica_id, worktree, client.clone(), cx));
 482            worktrees.push(worktree);
 483        }
 484
 485        let this = cx.add_model(|cx: &mut ModelContext<Self>| {
 486            let handle = cx.weak_handle();
 487            project_store.update(cx, |store, cx| store.add_project(handle, cx));
 488
 489            let mut this = Self {
 490                worktrees: Vec::new(),
 491                loading_buffers: Default::default(),
 492                opened_buffer: watch::channel(),
 493                shared_buffers: Default::default(),
 494                incomplete_buffers: Default::default(),
 495                loading_local_worktrees: Default::default(),
 496                active_entry: None,
 497                collaborators: Default::default(),
 498                _maintain_buffer_languages: Self::maintain_buffer_languages(&languages, cx),
 499                languages,
 500                user_store: user_store.clone(),
 501                project_store,
 502                fs,
 503                next_entry_id: Default::default(),
 504                next_diagnostic_group_id: Default::default(),
 505                client_subscriptions: vec![client.add_model_for_remote_entity(remote_id, cx)],
 506                _subscriptions: Default::default(),
 507                client: client.clone(),
 508                client_state: Some(ProjectClientState::Remote {
 509                    sharing_has_stopped: false,
 510                    remote_id,
 511                    replica_id,
 512                    _detect_unshare: cx.spawn_weak(move |this, mut cx| {
 513                        async move {
 514                            let mut status = client.status();
 515                            let is_connected =
 516                                status.next().await.map_or(false, |s| s.is_connected());
 517                            // Even if we're initially connected, any future change of the status means we momentarily disconnected.
 518                            if !is_connected || status.next().await.is_some() {
 519                                if let Some(this) = this.upgrade(&cx) {
 520                                    this.update(&mut cx, |this, cx| this.disconnected_from_host(cx))
 521                                }
 522                            }
 523                            Ok(())
 524                        }
 525                        .log_err()
 526                    }),
 527                }),
 528                language_servers: Default::default(),
 529                language_server_ids: Default::default(),
 530                language_server_settings: Default::default(),
 531                language_server_statuses: response
 532                    .language_servers
 533                    .into_iter()
 534                    .map(|server| {
 535                        (
 536                            server.id as usize,
 537                            LanguageServerStatus {
 538                                name: server.name,
 539                                pending_work: Default::default(),
 540                                has_pending_diagnostic_updates: false,
 541                                progress_tokens: Default::default(),
 542                            },
 543                        )
 544                    })
 545                    .collect(),
 546                last_workspace_edits_by_language_server: Default::default(),
 547                next_language_server_id: 0,
 548                opened_buffers: Default::default(),
 549                buffers_being_formatted: Default::default(),
 550                buffer_snapshots: Default::default(),
 551                nonce: StdRng::from_entropy().gen(),
 552            };
 553            for worktree in worktrees {
 554                this.add_worktree(&worktree, cx);
 555            }
 556            this
 557        });
 558
 559        let user_ids = response
 560            .collaborators
 561            .iter()
 562            .map(|peer| peer.user_id)
 563            .collect();
 564        user_store
 565            .update(&mut cx, |user_store, cx| user_store.get_users(user_ids, cx))
 566            .await?;
 567        let mut collaborators = HashMap::default();
 568        for message in response.collaborators {
 569            let collaborator = Collaborator::from_proto(message);
 570            collaborators.insert(collaborator.peer_id, collaborator);
 571        }
 572
 573        this.update(&mut cx, |this, _| {
 574            this.collaborators = collaborators;
 575        });
 576
 577        Ok(this)
 578    }
 579
 580    #[cfg(any(test, feature = "test-support"))]
 581    pub async fn test(
 582        fs: Arc<dyn Fs>,
 583        root_paths: impl IntoIterator<Item = &Path>,
 584        cx: &mut gpui::TestAppContext,
 585    ) -> ModelHandle<Project> {
 586        if !cx.read(|cx| cx.has_global::<Settings>()) {
 587            cx.update(|cx| {
 588                cx.set_global(Settings::test(cx));
 589                cx.set_global(HomeDir(Path::new("/tmp/").to_path_buf()))
 590            });
 591        }
 592
 593        let languages = Arc::new(LanguageRegistry::test());
 594        let http_client = client::test::FakeHttpClient::with_404_response();
 595        let client = cx.update(|cx| client::Client::new(http_client.clone(), cx));
 596        let user_store = cx.add_model(|cx| UserStore::new(client.clone(), http_client, cx));
 597        let project_store = cx.add_model(|_| ProjectStore::new());
 598        let project =
 599            cx.update(|cx| Project::local(client, user_store, project_store, languages, fs, cx));
 600        for path in root_paths {
 601            let (tree, _) = project
 602                .update(cx, |project, cx| {
 603                    project.find_or_create_local_worktree(path, true, cx)
 604                })
 605                .await
 606                .unwrap();
 607            tree.read_with(cx, |tree, _| tree.as_local().unwrap().scan_complete())
 608                .await;
 609        }
 610        project
 611    }
 612
 613    fn on_settings_changed(&mut self, cx: &mut ModelContext<Self>) {
 614        let settings = cx.global::<Settings>();
 615
 616        let mut language_servers_to_start = Vec::new();
 617        for buffer in self.opened_buffers.values() {
 618            if let Some(buffer) = buffer.upgrade(cx) {
 619                let buffer = buffer.read(cx);
 620                if let Some((file, language)) = File::from_dyn(buffer.file()).zip(buffer.language())
 621                {
 622                    if settings.enable_language_server(Some(&language.name())) {
 623                        let worktree = file.worktree.read(cx);
 624                        language_servers_to_start.push((
 625                            worktree.id(),
 626                            worktree.as_local().unwrap().abs_path().clone(),
 627                            language.clone(),
 628                        ));
 629                    }
 630                }
 631            }
 632        }
 633
 634        let mut language_servers_to_stop = Vec::new();
 635        for language in self.languages.to_vec() {
 636            if let Some(lsp_adapter) = language.lsp_adapter() {
 637                if !settings.enable_language_server(Some(&language.name())) {
 638                    let lsp_name = &lsp_adapter.name;
 639                    for (worktree_id, started_lsp_name) in self.language_server_ids.keys() {
 640                        if lsp_name == started_lsp_name {
 641                            language_servers_to_stop.push((*worktree_id, started_lsp_name.clone()));
 642                        }
 643                    }
 644                }
 645            }
 646        }
 647
 648        // Stop all newly-disabled language servers.
 649        for (worktree_id, adapter_name) in language_servers_to_stop {
 650            self.stop_language_server(worktree_id, adapter_name, cx)
 651                .detach();
 652        }
 653
 654        // Start all the newly-enabled language servers.
 655        for (worktree_id, worktree_path, language) in language_servers_to_start {
 656            self.start_language_server(worktree_id, worktree_path, language, cx);
 657        }
 658
 659        cx.notify();
 660    }
 661
 662    pub fn buffer_for_id(&self, remote_id: u64, cx: &AppContext) -> Option<ModelHandle<Buffer>> {
 663        self.opened_buffers
 664            .get(&remote_id)
 665            .and_then(|buffer| buffer.upgrade(cx))
 666    }
 667
 668    pub fn languages(&self) -> &Arc<LanguageRegistry> {
 669        &self.languages
 670    }
 671
 672    pub fn client(&self) -> Arc<Client> {
 673        self.client.clone()
 674    }
 675
 676    pub fn user_store(&self) -> ModelHandle<UserStore> {
 677        self.user_store.clone()
 678    }
 679
 680    pub fn project_store(&self) -> ModelHandle<ProjectStore> {
 681        self.project_store.clone()
 682    }
 683
 684    #[cfg(any(test, feature = "test-support"))]
 685    pub fn check_invariants(&self, cx: &AppContext) {
 686        if self.is_local() {
 687            let mut worktree_root_paths = HashMap::default();
 688            for worktree in self.worktrees(cx) {
 689                let worktree = worktree.read(cx);
 690                let abs_path = worktree.as_local().unwrap().abs_path().clone();
 691                let prev_worktree_id = worktree_root_paths.insert(abs_path.clone(), worktree.id());
 692                assert_eq!(
 693                    prev_worktree_id,
 694                    None,
 695                    "abs path {:?} for worktree {:?} is not unique ({:?} was already registered with the same path)",
 696                    abs_path,
 697                    worktree.id(),
 698                    prev_worktree_id
 699                )
 700            }
 701        } else {
 702            let replica_id = self.replica_id();
 703            for buffer in self.opened_buffers.values() {
 704                if let Some(buffer) = buffer.upgrade(cx) {
 705                    let buffer = buffer.read(cx);
 706                    assert_eq!(
 707                        buffer.deferred_ops_len(),
 708                        0,
 709                        "replica {}, buffer {} has deferred operations",
 710                        replica_id,
 711                        buffer.remote_id()
 712                    );
 713                }
 714            }
 715        }
 716    }
 717
 718    #[cfg(any(test, feature = "test-support"))]
 719    pub fn has_open_buffer(&self, path: impl Into<ProjectPath>, cx: &AppContext) -> bool {
 720        let path = path.into();
 721        if let Some(worktree) = self.worktree_for_id(path.worktree_id, cx) {
 722            self.opened_buffers.iter().any(|(_, buffer)| {
 723                if let Some(buffer) = buffer.upgrade(cx) {
 724                    if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
 725                        if file.worktree == worktree && file.path() == &path.path {
 726                            return true;
 727                        }
 728                    }
 729                }
 730                false
 731            })
 732        } else {
 733            false
 734        }
 735    }
 736
 737    pub fn fs(&self) -> &Arc<dyn Fs> {
 738        &self.fs
 739    }
 740
 741    pub fn remote_id(&self) -> Option<u64> {
 742        match self.client_state.as_ref()? {
 743            ProjectClientState::Local { remote_id, .. }
 744            | ProjectClientState::Remote { remote_id, .. } => Some(*remote_id),
 745        }
 746    }
 747
 748    pub fn replica_id(&self) -> ReplicaId {
 749        match &self.client_state {
 750            Some(ProjectClientState::Remote { replica_id, .. }) => *replica_id,
 751            _ => 0,
 752        }
 753    }
 754
 755    fn metadata_changed(&mut self, cx: &mut ModelContext<Self>) {
 756        if let Some(ProjectClientState::Local { remote_id, .. }) = &self.client_state {
 757            let project_id = *remote_id;
 758            // Broadcast worktrees only if the project is online.
 759            let worktrees = self
 760                .worktrees
 761                .iter()
 762                .filter_map(|worktree| {
 763                    worktree
 764                        .upgrade(cx)
 765                        .map(|worktree| worktree.read(cx).as_local().unwrap().metadata_proto())
 766                })
 767                .collect();
 768            self.client
 769                .send(proto::UpdateProject {
 770                    project_id,
 771                    worktrees,
 772                })
 773                .log_err();
 774
 775            let worktrees = self.visible_worktrees(cx).collect::<Vec<_>>();
 776            let scans_complete = futures::future::join_all(
 777                worktrees
 778                    .iter()
 779                    .filter_map(|worktree| Some(worktree.read(cx).as_local()?.scan_complete())),
 780            );
 781
 782            let worktrees = worktrees.into_iter().map(|handle| handle.downgrade());
 783
 784            cx.spawn_weak(move |_, cx| async move {
 785                scans_complete.await;
 786                cx.read(|cx| {
 787                    for worktree in worktrees {
 788                        if let Some(worktree) = worktree
 789                            .upgrade(cx)
 790                            .and_then(|worktree| worktree.read(cx).as_local())
 791                        {
 792                            worktree.send_extension_counts(project_id);
 793                        }
 794                    }
 795                })
 796            })
 797            .detach();
 798        }
 799
 800        self.project_store.update(cx, |_, cx| cx.notify());
 801        cx.notify();
 802    }
 803
 804    pub fn collaborators(&self) -> &HashMap<PeerId, Collaborator> {
 805        &self.collaborators
 806    }
 807
 808    pub fn worktrees<'a>(
 809        &'a self,
 810        cx: &'a AppContext,
 811    ) -> impl 'a + DoubleEndedIterator<Item = ModelHandle<Worktree>> {
 812        self.worktrees
 813            .iter()
 814            .filter_map(move |worktree| worktree.upgrade(cx))
 815    }
 816
 817    pub fn visible_worktrees<'a>(
 818        &'a self,
 819        cx: &'a AppContext,
 820    ) -> impl 'a + DoubleEndedIterator<Item = ModelHandle<Worktree>> {
 821        self.worktrees.iter().filter_map(|worktree| {
 822            worktree.upgrade(cx).and_then(|worktree| {
 823                if worktree.read(cx).is_visible() {
 824                    Some(worktree)
 825                } else {
 826                    None
 827                }
 828            })
 829        })
 830    }
 831
 832    pub fn worktree_root_names<'a>(&'a self, cx: &'a AppContext) -> impl Iterator<Item = &'a str> {
 833        self.visible_worktrees(cx)
 834            .map(|tree| tree.read(cx).root_name())
 835    }
 836
 837    pub fn worktree_for_id(
 838        &self,
 839        id: WorktreeId,
 840        cx: &AppContext,
 841    ) -> Option<ModelHandle<Worktree>> {
 842        self.worktrees(cx)
 843            .find(|worktree| worktree.read(cx).id() == id)
 844    }
 845
 846    pub fn worktree_for_entry(
 847        &self,
 848        entry_id: ProjectEntryId,
 849        cx: &AppContext,
 850    ) -> Option<ModelHandle<Worktree>> {
 851        self.worktrees(cx)
 852            .find(|worktree| worktree.read(cx).contains_entry(entry_id))
 853    }
 854
 855    pub fn worktree_id_for_entry(
 856        &self,
 857        entry_id: ProjectEntryId,
 858        cx: &AppContext,
 859    ) -> Option<WorktreeId> {
 860        self.worktree_for_entry(entry_id, cx)
 861            .map(|worktree| worktree.read(cx).id())
 862    }
 863
 864    pub fn contains_paths(&self, paths: &[PathBuf], cx: &AppContext) -> bool {
 865        paths.iter().all(|path| self.contains_path(path, cx))
 866    }
 867
 868    pub fn contains_path(&self, path: &Path, cx: &AppContext) -> bool {
 869        for worktree in self.worktrees(cx) {
 870            let worktree = worktree.read(cx).as_local();
 871            if worktree.map_or(false, |w| w.contains_abs_path(path)) {
 872                return true;
 873            }
 874        }
 875        false
 876    }
 877
 878    pub fn create_entry(
 879        &mut self,
 880        project_path: impl Into<ProjectPath>,
 881        is_directory: bool,
 882        cx: &mut ModelContext<Self>,
 883    ) -> Option<Task<Result<Entry>>> {
 884        let project_path = project_path.into();
 885        let worktree = self.worktree_for_id(project_path.worktree_id, cx)?;
 886        if self.is_local() {
 887            Some(worktree.update(cx, |worktree, cx| {
 888                worktree
 889                    .as_local_mut()
 890                    .unwrap()
 891                    .create_entry(project_path.path, is_directory, cx)
 892            }))
 893        } else {
 894            let client = self.client.clone();
 895            let project_id = self.remote_id().unwrap();
 896            Some(cx.spawn_weak(|_, mut cx| async move {
 897                let response = client
 898                    .request(proto::CreateProjectEntry {
 899                        worktree_id: project_path.worktree_id.to_proto(),
 900                        project_id,
 901                        path: project_path.path.as_os_str().as_bytes().to_vec(),
 902                        is_directory,
 903                    })
 904                    .await?;
 905                let entry = response
 906                    .entry
 907                    .ok_or_else(|| anyhow!("missing entry in response"))?;
 908                worktree
 909                    .update(&mut cx, |worktree, cx| {
 910                        worktree.as_remote_mut().unwrap().insert_entry(
 911                            entry,
 912                            response.worktree_scan_id as usize,
 913                            cx,
 914                        )
 915                    })
 916                    .await
 917            }))
 918        }
 919    }
 920
 921    pub fn copy_entry(
 922        &mut self,
 923        entry_id: ProjectEntryId,
 924        new_path: impl Into<Arc<Path>>,
 925        cx: &mut ModelContext<Self>,
 926    ) -> Option<Task<Result<Entry>>> {
 927        let worktree = self.worktree_for_entry(entry_id, cx)?;
 928        let new_path = new_path.into();
 929        if self.is_local() {
 930            worktree.update(cx, |worktree, cx| {
 931                worktree
 932                    .as_local_mut()
 933                    .unwrap()
 934                    .copy_entry(entry_id, new_path, cx)
 935            })
 936        } else {
 937            let client = self.client.clone();
 938            let project_id = self.remote_id().unwrap();
 939
 940            Some(cx.spawn_weak(|_, mut cx| async move {
 941                let response = client
 942                    .request(proto::CopyProjectEntry {
 943                        project_id,
 944                        entry_id: entry_id.to_proto(),
 945                        new_path: new_path.as_os_str().as_bytes().to_vec(),
 946                    })
 947                    .await?;
 948                let entry = response
 949                    .entry
 950                    .ok_or_else(|| anyhow!("missing entry in response"))?;
 951                worktree
 952                    .update(&mut cx, |worktree, cx| {
 953                        worktree.as_remote_mut().unwrap().insert_entry(
 954                            entry,
 955                            response.worktree_scan_id as usize,
 956                            cx,
 957                        )
 958                    })
 959                    .await
 960            }))
 961        }
 962    }
 963
 964    pub fn rename_entry(
 965        &mut self,
 966        entry_id: ProjectEntryId,
 967        new_path: impl Into<Arc<Path>>,
 968        cx: &mut ModelContext<Self>,
 969    ) -> Option<Task<Result<Entry>>> {
 970        let worktree = self.worktree_for_entry(entry_id, cx)?;
 971        let new_path = new_path.into();
 972        if self.is_local() {
 973            worktree.update(cx, |worktree, cx| {
 974                worktree
 975                    .as_local_mut()
 976                    .unwrap()
 977                    .rename_entry(entry_id, new_path, cx)
 978            })
 979        } else {
 980            let client = self.client.clone();
 981            let project_id = self.remote_id().unwrap();
 982
 983            Some(cx.spawn_weak(|_, mut cx| async move {
 984                let response = client
 985                    .request(proto::RenameProjectEntry {
 986                        project_id,
 987                        entry_id: entry_id.to_proto(),
 988                        new_path: new_path.as_os_str().as_bytes().to_vec(),
 989                    })
 990                    .await?;
 991                let entry = response
 992                    .entry
 993                    .ok_or_else(|| anyhow!("missing entry in response"))?;
 994                worktree
 995                    .update(&mut cx, |worktree, cx| {
 996                        worktree.as_remote_mut().unwrap().insert_entry(
 997                            entry,
 998                            response.worktree_scan_id as usize,
 999                            cx,
1000                        )
1001                    })
1002                    .await
1003            }))
1004        }
1005    }
1006
1007    pub fn delete_entry(
1008        &mut self,
1009        entry_id: ProjectEntryId,
1010        cx: &mut ModelContext<Self>,
1011    ) -> Option<Task<Result<()>>> {
1012        let worktree = self.worktree_for_entry(entry_id, cx)?;
1013        if self.is_local() {
1014            worktree.update(cx, |worktree, cx| {
1015                worktree.as_local_mut().unwrap().delete_entry(entry_id, cx)
1016            })
1017        } else {
1018            let client = self.client.clone();
1019            let project_id = self.remote_id().unwrap();
1020            Some(cx.spawn_weak(|_, mut cx| async move {
1021                let response = client
1022                    .request(proto::DeleteProjectEntry {
1023                        project_id,
1024                        entry_id: entry_id.to_proto(),
1025                    })
1026                    .await?;
1027                worktree
1028                    .update(&mut cx, move |worktree, cx| {
1029                        worktree.as_remote_mut().unwrap().delete_entry(
1030                            entry_id,
1031                            response.worktree_scan_id as usize,
1032                            cx,
1033                        )
1034                    })
1035                    .await
1036            }))
1037        }
1038    }
1039
1040    pub fn shared(&mut self, project_id: u64, cx: &mut ModelContext<Self>) -> Task<Result<()>> {
1041        if self.client_state.is_some() {
1042            return Task::ready(Err(anyhow!("project was already shared")));
1043        }
1044
1045        let mut worktree_share_tasks = Vec::new();
1046
1047        for open_buffer in self.opened_buffers.values_mut() {
1048            match open_buffer {
1049                OpenBuffer::Strong(_) => {}
1050                OpenBuffer::Weak(buffer) => {
1051                    if let Some(buffer) = buffer.upgrade(cx) {
1052                        *open_buffer = OpenBuffer::Strong(buffer);
1053                    }
1054                }
1055                OpenBuffer::Operations(_) => unreachable!(),
1056            }
1057        }
1058
1059        for worktree_handle in self.worktrees.iter_mut() {
1060            match worktree_handle {
1061                WorktreeHandle::Strong(_) => {}
1062                WorktreeHandle::Weak(worktree) => {
1063                    if let Some(worktree) = worktree.upgrade(cx) {
1064                        *worktree_handle = WorktreeHandle::Strong(worktree);
1065                    }
1066                }
1067            }
1068        }
1069
1070        for (server_id, status) in &self.language_server_statuses {
1071            self.client
1072                .send(proto::StartLanguageServer {
1073                    project_id,
1074                    server: Some(proto::LanguageServer {
1075                        id: *server_id as u64,
1076                        name: status.name.clone(),
1077                    }),
1078                })
1079                .log_err();
1080        }
1081
1082        for worktree in self.worktrees(cx).collect::<Vec<_>>() {
1083            worktree.update(cx, |worktree, cx| {
1084                let worktree = worktree.as_local_mut().unwrap();
1085                worktree_share_tasks.push(worktree.share(project_id, cx));
1086            });
1087        }
1088
1089        self.client_subscriptions
1090            .push(self.client.add_model_for_remote_entity(project_id, cx));
1091        self.metadata_changed(cx);
1092        cx.emit(Event::RemoteIdChanged(Some(project_id)));
1093        cx.notify();
1094
1095        let mut status = self.client.status();
1096        self.client_state = Some(ProjectClientState::Local {
1097            remote_id: project_id,
1098            _detect_unshare: cx.spawn_weak(move |this, mut cx| {
1099                async move {
1100                    let is_connected = status.next().await.map_or(false, |s| s.is_connected());
1101                    // Even if we're initially connected, any future change of the status means we momentarily disconnected.
1102                    if !is_connected || status.next().await.is_some() {
1103                        if let Some(this) = this.upgrade(&cx) {
1104                            let _ = this.update(&mut cx, |this, cx| this.unshare(cx));
1105                        }
1106                    }
1107                    Ok(())
1108                }
1109                .log_err()
1110            }),
1111        });
1112
1113        cx.foreground().spawn(async move {
1114            futures::future::try_join_all(worktree_share_tasks).await?;
1115            Ok(())
1116        })
1117    }
1118
1119    pub fn unshare(&mut self, cx: &mut ModelContext<Self>) -> Result<()> {
1120        if self.is_remote() {
1121            return Err(anyhow!("attempted to unshare a remote project"));
1122        }
1123
1124        if let Some(ProjectClientState::Local { remote_id, .. }) = self.client_state.take() {
1125            self.collaborators.clear();
1126            self.shared_buffers.clear();
1127            self.client_subscriptions.clear();
1128
1129            for worktree_handle in self.worktrees.iter_mut() {
1130                if let WorktreeHandle::Strong(worktree) = worktree_handle {
1131                    let is_visible = worktree.update(cx, |worktree, _| {
1132                        worktree.as_local_mut().unwrap().unshare();
1133                        worktree.is_visible()
1134                    });
1135                    if !is_visible {
1136                        *worktree_handle = WorktreeHandle::Weak(worktree.downgrade());
1137                    }
1138                }
1139            }
1140
1141            for open_buffer in self.opened_buffers.values_mut() {
1142                if let OpenBuffer::Strong(buffer) = open_buffer {
1143                    *open_buffer = OpenBuffer::Weak(buffer.downgrade());
1144                }
1145            }
1146
1147            self.metadata_changed(cx);
1148            cx.notify();
1149            self.client.send(proto::UnshareProject {
1150                project_id: remote_id,
1151            })?;
1152
1153            Ok(())
1154        } else {
1155            Err(anyhow!("attempted to unshare an unshared project"))
1156        }
1157    }
1158
1159    fn disconnected_from_host(&mut self, cx: &mut ModelContext<Self>) {
1160        if let Some(ProjectClientState::Remote {
1161            sharing_has_stopped,
1162            ..
1163        }) = &mut self.client_state
1164        {
1165            *sharing_has_stopped = true;
1166            self.collaborators.clear();
1167            for worktree in &self.worktrees {
1168                if let Some(worktree) = worktree.upgrade(cx) {
1169                    worktree.update(cx, |worktree, _| {
1170                        if let Some(worktree) = worktree.as_remote_mut() {
1171                            worktree.disconnected_from_host();
1172                        }
1173                    });
1174                }
1175            }
1176            cx.emit(Event::DisconnectedFromHost);
1177            cx.notify();
1178
1179            // Wake up all futures currently waiting on a buffer to get opened,
1180            // to give them a chance to fail now that we've disconnected.
1181            *self.opened_buffer.0.borrow_mut() = ();
1182        }
1183    }
1184
1185    pub fn is_read_only(&self) -> bool {
1186        match &self.client_state {
1187            Some(ProjectClientState::Remote {
1188                sharing_has_stopped,
1189                ..
1190            }) => *sharing_has_stopped,
1191            _ => false,
1192        }
1193    }
1194
1195    pub fn is_local(&self) -> bool {
1196        match &self.client_state {
1197            Some(ProjectClientState::Remote { .. }) => false,
1198            _ => true,
1199        }
1200    }
1201
1202    pub fn is_remote(&self) -> bool {
1203        !self.is_local()
1204    }
1205
1206    pub fn create_buffer(
1207        &mut self,
1208        text: &str,
1209        language: Option<Arc<Language>>,
1210        cx: &mut ModelContext<Self>,
1211    ) -> Result<ModelHandle<Buffer>> {
1212        if self.is_remote() {
1213            return Err(anyhow!("creating buffers as a guest is not supported yet"));
1214        }
1215
1216        let buffer = cx.add_model(|cx| {
1217            Buffer::new(self.replica_id(), text, cx)
1218                .with_language(language.unwrap_or_else(|| language::PLAIN_TEXT.clone()), cx)
1219        });
1220        self.register_buffer(&buffer, cx)?;
1221        Ok(buffer)
1222    }
1223
1224    pub fn open_path(
1225        &mut self,
1226        path: impl Into<ProjectPath>,
1227        cx: &mut ModelContext<Self>,
1228    ) -> Task<Result<(ProjectEntryId, AnyModelHandle)>> {
1229        let task = self.open_buffer(path, cx);
1230        cx.spawn_weak(|_, cx| async move {
1231            let buffer = task.await?;
1232            let project_entry_id = buffer
1233                .read_with(&cx, |buffer, cx| {
1234                    File::from_dyn(buffer.file()).and_then(|file| file.project_entry_id(cx))
1235                })
1236                .ok_or_else(|| anyhow!("no project entry"))?;
1237            Ok((project_entry_id, buffer.into()))
1238        })
1239    }
1240
1241    pub fn open_local_buffer(
1242        &mut self,
1243        abs_path: impl AsRef<Path>,
1244        cx: &mut ModelContext<Self>,
1245    ) -> Task<Result<ModelHandle<Buffer>>> {
1246        if let Some((worktree, relative_path)) = self.find_local_worktree(abs_path.as_ref(), cx) {
1247            self.open_buffer((worktree.read(cx).id(), relative_path), cx)
1248        } else {
1249            Task::ready(Err(anyhow!("no such path")))
1250        }
1251    }
1252
1253    pub fn open_buffer(
1254        &mut self,
1255        path: impl Into<ProjectPath>,
1256        cx: &mut ModelContext<Self>,
1257    ) -> Task<Result<ModelHandle<Buffer>>> {
1258        let project_path = path.into();
1259        let worktree = if let Some(worktree) = self.worktree_for_id(project_path.worktree_id, cx) {
1260            worktree
1261        } else {
1262            return Task::ready(Err(anyhow!("no such worktree")));
1263        };
1264
1265        // If there is already a buffer for the given path, then return it.
1266        let existing_buffer = self.get_open_buffer(&project_path, cx);
1267        if let Some(existing_buffer) = existing_buffer {
1268            return Task::ready(Ok(existing_buffer));
1269        }
1270
1271        let mut loading_watch = match self.loading_buffers.entry(project_path.clone()) {
1272            // If the given path is already being loaded, then wait for that existing
1273            // task to complete and return the same buffer.
1274            hash_map::Entry::Occupied(e) => e.get().clone(),
1275
1276            // Otherwise, record the fact that this path is now being loaded.
1277            hash_map::Entry::Vacant(entry) => {
1278                let (mut tx, rx) = postage::watch::channel();
1279                entry.insert(rx.clone());
1280
1281                let load_buffer = if worktree.read(cx).is_local() {
1282                    self.open_local_buffer_internal(&project_path.path, &worktree, cx)
1283                } else {
1284                    self.open_remote_buffer_internal(&project_path.path, &worktree, cx)
1285                };
1286
1287                cx.spawn(move |this, mut cx| async move {
1288                    let load_result = load_buffer.await;
1289                    *tx.borrow_mut() = Some(this.update(&mut cx, |this, _| {
1290                        // Record the fact that the buffer is no longer loading.
1291                        this.loading_buffers.remove(&project_path);
1292                        let buffer = load_result.map_err(Arc::new)?;
1293                        Ok(buffer)
1294                    }));
1295                })
1296                .detach();
1297                rx
1298            }
1299        };
1300
1301        cx.foreground().spawn(async move {
1302            loop {
1303                if let Some(result) = loading_watch.borrow().as_ref() {
1304                    match result {
1305                        Ok(buffer) => return Ok(buffer.clone()),
1306                        Err(error) => return Err(anyhow!("{}", error)),
1307                    }
1308                }
1309                loading_watch.next().await;
1310            }
1311        })
1312    }
1313
1314    fn open_local_buffer_internal(
1315        &mut self,
1316        path: &Arc<Path>,
1317        worktree: &ModelHandle<Worktree>,
1318        cx: &mut ModelContext<Self>,
1319    ) -> Task<Result<ModelHandle<Buffer>>> {
1320        let load_buffer = worktree.update(cx, |worktree, cx| {
1321            let worktree = worktree.as_local_mut().unwrap();
1322            worktree.load_buffer(path, cx)
1323        });
1324        cx.spawn(|this, mut cx| async move {
1325            let buffer = load_buffer.await?;
1326            this.update(&mut cx, |this, cx| this.register_buffer(&buffer, cx))?;
1327            Ok(buffer)
1328        })
1329    }
1330
1331    fn open_remote_buffer_internal(
1332        &mut self,
1333        path: &Arc<Path>,
1334        worktree: &ModelHandle<Worktree>,
1335        cx: &mut ModelContext<Self>,
1336    ) -> Task<Result<ModelHandle<Buffer>>> {
1337        let rpc = self.client.clone();
1338        let project_id = self.remote_id().unwrap();
1339        let remote_worktree_id = worktree.read(cx).id();
1340        let path = path.clone();
1341        let path_string = path.to_string_lossy().to_string();
1342        cx.spawn(|this, mut cx| async move {
1343            let response = rpc
1344                .request(proto::OpenBufferByPath {
1345                    project_id,
1346                    worktree_id: remote_worktree_id.to_proto(),
1347                    path: path_string,
1348                })
1349                .await?;
1350            this.update(&mut cx, |this, cx| {
1351                this.wait_for_buffer(response.buffer_id, cx)
1352            })
1353            .await
1354        })
1355    }
1356
1357    /// LanguageServerName is owned, because it is inserted into a map
1358    fn open_local_buffer_via_lsp(
1359        &mut self,
1360        abs_path: lsp::Url,
1361        language_server_id: usize,
1362        language_server_name: LanguageServerName,
1363        cx: &mut ModelContext<Self>,
1364    ) -> Task<Result<ModelHandle<Buffer>>> {
1365        cx.spawn(|this, mut cx| async move {
1366            let abs_path = abs_path
1367                .to_file_path()
1368                .map_err(|_| anyhow!("can't convert URI to path"))?;
1369            let (worktree, relative_path) = if let Some(result) =
1370                this.read_with(&cx, |this, cx| this.find_local_worktree(&abs_path, cx))
1371            {
1372                result
1373            } else {
1374                let worktree = this
1375                    .update(&mut cx, |this, cx| {
1376                        this.create_local_worktree(&abs_path, false, cx)
1377                    })
1378                    .await?;
1379                this.update(&mut cx, |this, cx| {
1380                    this.language_server_ids.insert(
1381                        (worktree.read(cx).id(), language_server_name),
1382                        language_server_id,
1383                    );
1384                });
1385                (worktree, PathBuf::new())
1386            };
1387
1388            let project_path = ProjectPath {
1389                worktree_id: worktree.read_with(&cx, |worktree, _| worktree.id()),
1390                path: relative_path.into(),
1391            };
1392            this.update(&mut cx, |this, cx| this.open_buffer(project_path, cx))
1393                .await
1394        })
1395    }
1396
1397    pub fn open_buffer_by_id(
1398        &mut self,
1399        id: u64,
1400        cx: &mut ModelContext<Self>,
1401    ) -> Task<Result<ModelHandle<Buffer>>> {
1402        if let Some(buffer) = self.buffer_for_id(id, cx) {
1403            Task::ready(Ok(buffer))
1404        } else if self.is_local() {
1405            Task::ready(Err(anyhow!("buffer {} does not exist", id)))
1406        } else if let Some(project_id) = self.remote_id() {
1407            let request = self
1408                .client
1409                .request(proto::OpenBufferById { project_id, id });
1410            cx.spawn(|this, mut cx| async move {
1411                let buffer_id = request.await?.buffer_id;
1412                this.update(&mut cx, |this, cx| this.wait_for_buffer(buffer_id, cx))
1413                    .await
1414            })
1415        } else {
1416            Task::ready(Err(anyhow!("cannot open buffer while disconnected")))
1417        }
1418    }
1419
1420    pub fn save_buffer_as(
1421        &mut self,
1422        buffer: ModelHandle<Buffer>,
1423        abs_path: PathBuf,
1424        cx: &mut ModelContext<Project>,
1425    ) -> Task<Result<()>> {
1426        let worktree_task = self.find_or_create_local_worktree(&abs_path, true, cx);
1427        let old_path =
1428            File::from_dyn(buffer.read(cx).file()).and_then(|f| Some(f.as_local()?.abs_path(cx)));
1429        cx.spawn(|this, mut cx| async move {
1430            if let Some(old_path) = old_path {
1431                this.update(&mut cx, |this, cx| {
1432                    this.unregister_buffer_from_language_server(&buffer, old_path, cx);
1433                });
1434            }
1435            let (worktree, path) = worktree_task.await?;
1436            worktree
1437                .update(&mut cx, |worktree, cx| {
1438                    worktree
1439                        .as_local_mut()
1440                        .unwrap()
1441                        .save_buffer_as(buffer.clone(), path, cx)
1442                })
1443                .await?;
1444            this.update(&mut cx, |this, cx| {
1445                this.assign_language_to_buffer(&buffer, cx);
1446                this.register_buffer_with_language_server(&buffer, cx);
1447            });
1448            Ok(())
1449        })
1450    }
1451
1452    pub fn get_open_buffer(
1453        &mut self,
1454        path: &ProjectPath,
1455        cx: &mut ModelContext<Self>,
1456    ) -> Option<ModelHandle<Buffer>> {
1457        let worktree = self.worktree_for_id(path.worktree_id, cx)?;
1458        self.opened_buffers.values().find_map(|buffer| {
1459            let buffer = buffer.upgrade(cx)?;
1460            let file = File::from_dyn(buffer.read(cx).file())?;
1461            if file.worktree == worktree && file.path() == &path.path {
1462                Some(buffer)
1463            } else {
1464                None
1465            }
1466        })
1467    }
1468
1469    fn register_buffer(
1470        &mut self,
1471        buffer: &ModelHandle<Buffer>,
1472        cx: &mut ModelContext<Self>,
1473    ) -> Result<()> {
1474        let remote_id = buffer.read(cx).remote_id();
1475        let open_buffer = if self.is_remote() || self.is_shared() {
1476            OpenBuffer::Strong(buffer.clone())
1477        } else {
1478            OpenBuffer::Weak(buffer.downgrade())
1479        };
1480
1481        match self.opened_buffers.insert(remote_id, open_buffer) {
1482            None => {}
1483            Some(OpenBuffer::Operations(operations)) => {
1484                buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx))?
1485            }
1486            Some(OpenBuffer::Weak(existing_handle)) => {
1487                if existing_handle.upgrade(cx).is_some() {
1488                    Err(anyhow!(
1489                        "already registered buffer with remote id {}",
1490                        remote_id
1491                    ))?
1492                }
1493            }
1494            Some(OpenBuffer::Strong(_)) => Err(anyhow!(
1495                "already registered buffer with remote id {}",
1496                remote_id
1497            ))?,
1498        }
1499        cx.subscribe(buffer, |this, buffer, event, cx| {
1500            this.on_buffer_event(buffer, event, cx);
1501        })
1502        .detach();
1503
1504        self.assign_language_to_buffer(buffer, cx);
1505        self.register_buffer_with_language_server(buffer, cx);
1506        cx.observe_release(buffer, |this, buffer, cx| {
1507            if let Some(file) = File::from_dyn(buffer.file()) {
1508                if file.is_local() {
1509                    let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
1510                    if let Some((_, server)) = this.language_server_for_buffer(buffer, cx) {
1511                        server
1512                            .notify::<lsp::notification::DidCloseTextDocument>(
1513                                lsp::DidCloseTextDocumentParams {
1514                                    text_document: lsp::TextDocumentIdentifier::new(uri),
1515                                },
1516                            )
1517                            .log_err();
1518                    }
1519                }
1520            }
1521        })
1522        .detach();
1523
1524        *self.opened_buffer.0.borrow_mut() = ();
1525        Ok(())
1526    }
1527
1528    fn register_buffer_with_language_server(
1529        &mut self,
1530        buffer_handle: &ModelHandle<Buffer>,
1531        cx: &mut ModelContext<Self>,
1532    ) {
1533        let buffer = buffer_handle.read(cx);
1534        let buffer_id = buffer.remote_id();
1535        if let Some(file) = File::from_dyn(buffer.file()) {
1536            if file.is_local() {
1537                let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
1538                let initial_snapshot = buffer.text_snapshot();
1539
1540                let mut language_server = None;
1541                let mut language_id = None;
1542                if let Some(language) = buffer.language() {
1543                    let worktree_id = file.worktree_id(cx);
1544                    if let Some(adapter) = language.lsp_adapter() {
1545                        language_id = adapter.language_ids.get(language.name().as_ref()).cloned();
1546                        language_server = self
1547                            .language_server_ids
1548                            .get(&(worktree_id, adapter.name.clone()))
1549                            .and_then(|id| self.language_servers.get(id))
1550                            .and_then(|server_state| {
1551                                if let LanguageServerState::Running { server, .. } = server_state {
1552                                    Some(server.clone())
1553                                } else {
1554                                    None
1555                                }
1556                            });
1557                    }
1558                }
1559
1560                if let Some(local_worktree) = file.worktree.read(cx).as_local() {
1561                    if let Some(diagnostics) = local_worktree.diagnostics_for_path(file.path()) {
1562                        self.update_buffer_diagnostics(buffer_handle, diagnostics, None, cx)
1563                            .log_err();
1564                    }
1565                }
1566
1567                if let Some(server) = language_server {
1568                    server
1569                        .notify::<lsp::notification::DidOpenTextDocument>(
1570                            lsp::DidOpenTextDocumentParams {
1571                                text_document: lsp::TextDocumentItem::new(
1572                                    uri,
1573                                    language_id.unwrap_or_default(),
1574                                    0,
1575                                    initial_snapshot.text(),
1576                                ),
1577                            },
1578                        )
1579                        .log_err();
1580                    buffer_handle.update(cx, |buffer, cx| {
1581                        buffer.set_completion_triggers(
1582                            server
1583                                .capabilities()
1584                                .completion_provider
1585                                .as_ref()
1586                                .and_then(|provider| provider.trigger_characters.clone())
1587                                .unwrap_or_default(),
1588                            cx,
1589                        )
1590                    });
1591                    self.buffer_snapshots
1592                        .insert(buffer_id, vec![(0, initial_snapshot)]);
1593                }
1594            }
1595        }
1596    }
1597
1598    fn unregister_buffer_from_language_server(
1599        &mut self,
1600        buffer: &ModelHandle<Buffer>,
1601        old_path: PathBuf,
1602        cx: &mut ModelContext<Self>,
1603    ) {
1604        buffer.update(cx, |buffer, cx| {
1605            buffer.update_diagnostics(Default::default(), cx);
1606            self.buffer_snapshots.remove(&buffer.remote_id());
1607            if let Some((_, language_server)) = self.language_server_for_buffer(buffer, cx) {
1608                language_server
1609                    .notify::<lsp::notification::DidCloseTextDocument>(
1610                        lsp::DidCloseTextDocumentParams {
1611                            text_document: lsp::TextDocumentIdentifier::new(
1612                                lsp::Url::from_file_path(old_path).unwrap(),
1613                            ),
1614                        },
1615                    )
1616                    .log_err();
1617            }
1618        });
1619    }
1620
1621    fn on_buffer_event(
1622        &mut self,
1623        buffer: ModelHandle<Buffer>,
1624        event: &BufferEvent,
1625        cx: &mut ModelContext<Self>,
1626    ) -> Option<()> {
1627        match event {
1628            BufferEvent::Operation(operation) => {
1629                if let Some(project_id) = self.remote_id() {
1630                    let request = self.client.request(proto::UpdateBuffer {
1631                        project_id,
1632                        buffer_id: buffer.read(cx).remote_id(),
1633                        operations: vec![language::proto::serialize_operation(operation)],
1634                    });
1635                    cx.background().spawn(request).detach_and_log_err(cx);
1636                } else if let Some(project_id) = self.remote_id() {
1637                    let _ = self
1638                        .client
1639                        .send(proto::RegisterProjectActivity { project_id });
1640                }
1641            }
1642            BufferEvent::Edited { .. } => {
1643                let language_server = self
1644                    .language_server_for_buffer(buffer.read(cx), cx)
1645                    .map(|(_, server)| server.clone())?;
1646                let buffer = buffer.read(cx);
1647                let file = File::from_dyn(buffer.file())?;
1648                let abs_path = file.as_local()?.abs_path(cx);
1649                let uri = lsp::Url::from_file_path(abs_path).unwrap();
1650                let buffer_snapshots = self.buffer_snapshots.get_mut(&buffer.remote_id())?;
1651                let (version, prev_snapshot) = buffer_snapshots.last()?;
1652                let next_snapshot = buffer.text_snapshot();
1653                let next_version = version + 1;
1654
1655                let content_changes = buffer
1656                    .edits_since::<(PointUtf16, usize)>(prev_snapshot.version())
1657                    .map(|edit| {
1658                        let edit_start = edit.new.start.0;
1659                        let edit_end = edit_start + (edit.old.end.0 - edit.old.start.0);
1660                        let new_text = next_snapshot
1661                            .text_for_range(edit.new.start.1..edit.new.end.1)
1662                            .collect();
1663                        lsp::TextDocumentContentChangeEvent {
1664                            range: Some(lsp::Range::new(
1665                                point_to_lsp(edit_start),
1666                                point_to_lsp(edit_end),
1667                            )),
1668                            range_length: None,
1669                            text: new_text,
1670                        }
1671                    })
1672                    .collect();
1673
1674                buffer_snapshots.push((next_version, next_snapshot));
1675
1676                language_server
1677                    .notify::<lsp::notification::DidChangeTextDocument>(
1678                        lsp::DidChangeTextDocumentParams {
1679                            text_document: lsp::VersionedTextDocumentIdentifier::new(
1680                                uri,
1681                                next_version,
1682                            ),
1683                            content_changes,
1684                        },
1685                    )
1686                    .log_err();
1687            }
1688            BufferEvent::Saved => {
1689                let file = File::from_dyn(buffer.read(cx).file())?;
1690                let worktree_id = file.worktree_id(cx);
1691                let abs_path = file.as_local()?.abs_path(cx);
1692                let text_document = lsp::TextDocumentIdentifier {
1693                    uri: lsp::Url::from_file_path(abs_path).unwrap(),
1694                };
1695
1696                for (_, _, server) in self.language_servers_for_worktree(worktree_id) {
1697                    server
1698                        .notify::<lsp::notification::DidSaveTextDocument>(
1699                            lsp::DidSaveTextDocumentParams {
1700                                text_document: text_document.clone(),
1701                                text: None,
1702                            },
1703                        )
1704                        .log_err();
1705                }
1706
1707                // After saving a buffer, simulate disk-based diagnostics being finished for languages
1708                // that don't support a disk-based progress token.
1709                let (lsp_adapter, language_server) =
1710                    self.language_server_for_buffer(buffer.read(cx), cx)?;
1711                if lsp_adapter.disk_based_diagnostics_progress_token.is_none() {
1712                    let server_id = language_server.server_id();
1713                    self.disk_based_diagnostics_finished(server_id, cx);
1714                    self.broadcast_language_server_update(
1715                        server_id,
1716                        proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(
1717                            proto::LspDiskBasedDiagnosticsUpdated {},
1718                        ),
1719                    );
1720                }
1721            }
1722            _ => {}
1723        }
1724
1725        None
1726    }
1727
1728    fn language_servers_for_worktree(
1729        &self,
1730        worktree_id: WorktreeId,
1731    ) -> impl Iterator<Item = (&Arc<CachedLspAdapter>, &Arc<Language>, &Arc<LanguageServer>)> {
1732        self.language_server_ids
1733            .iter()
1734            .filter_map(move |((language_server_worktree_id, _), id)| {
1735                if *language_server_worktree_id == worktree_id {
1736                    if let Some(LanguageServerState::Running {
1737                        adapter,
1738                        language,
1739                        server,
1740                    }) = self.language_servers.get(id)
1741                    {
1742                        return Some((adapter, language, server));
1743                    }
1744                }
1745                None
1746            })
1747    }
1748
1749    fn maintain_buffer_languages(
1750        languages: &LanguageRegistry,
1751        cx: &mut ModelContext<Project>,
1752    ) -> Task<()> {
1753        let mut subscription = languages.subscribe();
1754        cx.spawn_weak(|project, mut cx| async move {
1755            while let Some(()) = subscription.next().await {
1756                if let Some(project) = project.upgrade(&cx) {
1757                    project.update(&mut cx, |project, cx| {
1758                        let mut buffers_without_language = Vec::new();
1759                        for buffer in project.opened_buffers.values() {
1760                            if let Some(buffer) = buffer.upgrade(cx) {
1761                                if buffer.read(cx).language().is_none() {
1762                                    buffers_without_language.push(buffer);
1763                                }
1764                            }
1765                        }
1766
1767                        for buffer in buffers_without_language {
1768                            project.assign_language_to_buffer(&buffer, cx);
1769                            project.register_buffer_with_language_server(&buffer, cx);
1770                        }
1771                    });
1772                }
1773            }
1774        })
1775    }
1776
1777    fn assign_language_to_buffer(
1778        &mut self,
1779        buffer: &ModelHandle<Buffer>,
1780        cx: &mut ModelContext<Self>,
1781    ) -> Option<()> {
1782        // If the buffer has a language, set it and start the language server if we haven't already.
1783        let full_path = buffer.read(cx).file()?.full_path(cx);
1784        let new_language = self.languages.select_language(&full_path)?;
1785        buffer.update(cx, |buffer, cx| {
1786            if buffer.language().map_or(true, |old_language| {
1787                !Arc::ptr_eq(old_language, &new_language)
1788            }) {
1789                buffer.set_language_registry(self.languages.clone());
1790                buffer.set_language(Some(new_language.clone()), cx);
1791            }
1792        });
1793
1794        let file = File::from_dyn(buffer.read(cx).file())?;
1795        let worktree = file.worktree.read(cx).as_local()?;
1796        let worktree_id = worktree.id();
1797        let worktree_abs_path = worktree.abs_path().clone();
1798        self.start_language_server(worktree_id, worktree_abs_path, new_language, cx);
1799
1800        None
1801    }
1802
1803    fn merge_json_value_into(source: serde_json::Value, target: &mut serde_json::Value) {
1804        use serde_json::Value;
1805
1806        match (source, target) {
1807            (Value::Object(source), Value::Object(target)) => {
1808                for (key, value) in source {
1809                    if let Some(target) = target.get_mut(&key) {
1810                        Self::merge_json_value_into(value, target);
1811                    } else {
1812                        target.insert(key.clone(), value);
1813                    }
1814                }
1815            }
1816
1817            (source, target) => *target = source,
1818        }
1819    }
1820
1821    fn start_language_server(
1822        &mut self,
1823        worktree_id: WorktreeId,
1824        worktree_path: Arc<Path>,
1825        language: Arc<Language>,
1826        cx: &mut ModelContext<Self>,
1827    ) {
1828        if !cx
1829            .global::<Settings>()
1830            .enable_language_server(Some(&language.name()))
1831        {
1832            return;
1833        }
1834
1835        let adapter = if let Some(adapter) = language.lsp_adapter() {
1836            adapter
1837        } else {
1838            return;
1839        };
1840        let key = (worktree_id, adapter.name.clone());
1841
1842        let mut initialization_options = adapter.initialization_options.clone();
1843
1844        let lsp = &cx.global::<Settings>().lsp.get(&adapter.name.0);
1845        let override_options = lsp.map(|s| s.initialization_options.clone()).flatten();
1846        match (&mut initialization_options, override_options) {
1847            (Some(initialization_options), Some(override_options)) => {
1848                Self::merge_json_value_into(override_options, initialization_options);
1849            }
1850
1851            (None, override_options) => initialization_options = override_options,
1852
1853            _ => {}
1854        }
1855
1856        self.language_server_ids
1857            .entry(key.clone())
1858            .or_insert_with(|| {
1859                let server_id = post_inc(&mut self.next_language_server_id);
1860                let language_server = self.languages.start_language_server(
1861                    server_id,
1862                    language.clone(),
1863                    worktree_path,
1864                    self.client.http_client(),
1865                    cx,
1866                );
1867                self.language_servers.insert(
1868                    server_id,
1869                    LanguageServerState::Starting(cx.spawn_weak(|this, mut cx| async move {
1870                        let language_server = language_server?.await.log_err()?;
1871                        let language_server = language_server
1872                            .initialize(initialization_options)
1873                            .await
1874                            .log_err()?;
1875                        let this = this.upgrade(&cx)?;
1876
1877                        language_server
1878                            .on_notification::<lsp::notification::PublishDiagnostics, _>({
1879                                let this = this.downgrade();
1880                                let adapter = adapter.clone();
1881                                move |mut params, cx| {
1882                                    let this = this;
1883                                    let adapter = adapter.clone();
1884                                    cx.spawn(|mut cx| async move {
1885                                        adapter.process_diagnostics(&mut params).await;
1886                                        if let Some(this) = this.upgrade(&cx) {
1887                                            this.update(&mut cx, |this, cx| {
1888                                                this.update_diagnostics(
1889                                                    server_id,
1890                                                    params,
1891                                                    &adapter.disk_based_diagnostic_sources,
1892                                                    cx,
1893                                                )
1894                                                .log_err();
1895                                            });
1896                                        }
1897                                    })
1898                                    .detach();
1899                                }
1900                            })
1901                            .detach();
1902
1903                        language_server
1904                            .on_request::<lsp::request::WorkspaceConfiguration, _, _>({
1905                                let settings = this.read_with(&cx, |this, _| {
1906                                    this.language_server_settings.clone()
1907                                });
1908                                move |params, _| {
1909                                    let settings = settings.lock().clone();
1910                                    async move {
1911                                        Ok(params
1912                                            .items
1913                                            .into_iter()
1914                                            .map(|item| {
1915                                                if let Some(section) = &item.section {
1916                                                    settings
1917                                                        .get(section)
1918                                                        .cloned()
1919                                                        .unwrap_or(serde_json::Value::Null)
1920                                                } else {
1921                                                    settings.clone()
1922                                                }
1923                                            })
1924                                            .collect())
1925                                    }
1926                                }
1927                            })
1928                            .detach();
1929
1930                        // Even though we don't have handling for these requests, respond to them to
1931                        // avoid stalling any language server like `gopls` which waits for a response
1932                        // to these requests when initializing.
1933                        language_server
1934                            .on_request::<lsp::request::WorkDoneProgressCreate, _, _>({
1935                                let this = this.downgrade();
1936                                move |params, mut cx| async move {
1937                                    if let Some(this) = this.upgrade(&cx) {
1938                                        this.update(&mut cx, |this, _| {
1939                                            if let Some(status) =
1940                                                this.language_server_statuses.get_mut(&server_id)
1941                                            {
1942                                                if let lsp::NumberOrString::String(token) =
1943                                                    params.token
1944                                                {
1945                                                    status.progress_tokens.insert(token);
1946                                                }
1947                                            }
1948                                        });
1949                                    }
1950                                    Ok(())
1951                                }
1952                            })
1953                            .detach();
1954                        language_server
1955                            .on_request::<lsp::request::RegisterCapability, _, _>(|_, _| async {
1956                                Ok(())
1957                            })
1958                            .detach();
1959
1960                        language_server
1961                            .on_request::<lsp::request::ApplyWorkspaceEdit, _, _>({
1962                                let this = this.downgrade();
1963                                let adapter = adapter.clone();
1964                                let language_server = language_server.clone();
1965                                move |params, cx| {
1966                                    Self::on_lsp_workspace_edit(
1967                                        this,
1968                                        params,
1969                                        server_id,
1970                                        adapter.clone(),
1971                                        language_server.clone(),
1972                                        cx,
1973                                    )
1974                                }
1975                            })
1976                            .detach();
1977
1978                        let disk_based_diagnostics_progress_token =
1979                            adapter.disk_based_diagnostics_progress_token.clone();
1980
1981                        language_server
1982                            .on_notification::<lsp::notification::Progress, _>({
1983                                let this = this.downgrade();
1984                                move |params, mut cx| {
1985                                    if let Some(this) = this.upgrade(&cx) {
1986                                        this.update(&mut cx, |this, cx| {
1987                                            this.on_lsp_progress(
1988                                                params,
1989                                                server_id,
1990                                                disk_based_diagnostics_progress_token.clone(),
1991                                                cx,
1992                                            );
1993                                        });
1994                                    }
1995                                }
1996                            })
1997                            .detach();
1998
1999                        this.update(&mut cx, |this, cx| {
2000                            // If the language server for this key doesn't match the server id, don't store the
2001                            // server. Which will cause it to be dropped, killing the process
2002                            if this
2003                                .language_server_ids
2004                                .get(&key)
2005                                .map(|id| id != &server_id)
2006                                .unwrap_or(false)
2007                            {
2008                                return None;
2009                            }
2010
2011                            // Update language_servers collection with Running variant of LanguageServerState
2012                            // indicating that the server is up and running and ready
2013                            this.language_servers.insert(
2014                                server_id,
2015                                LanguageServerState::Running {
2016                                    adapter: adapter.clone(),
2017                                    language,
2018                                    server: language_server.clone(),
2019                                },
2020                            );
2021                            this.language_server_statuses.insert(
2022                                server_id,
2023                                LanguageServerStatus {
2024                                    name: language_server.name().to_string(),
2025                                    pending_work: Default::default(),
2026                                    has_pending_diagnostic_updates: false,
2027                                    progress_tokens: Default::default(),
2028                                },
2029                            );
2030                            language_server
2031                                .notify::<lsp::notification::DidChangeConfiguration>(
2032                                    lsp::DidChangeConfigurationParams {
2033                                        settings: this.language_server_settings.lock().clone(),
2034                                    },
2035                                )
2036                                .ok();
2037
2038                            if let Some(project_id) = this.remote_id() {
2039                                this.client
2040                                    .send(proto::StartLanguageServer {
2041                                        project_id,
2042                                        server: Some(proto::LanguageServer {
2043                                            id: server_id as u64,
2044                                            name: language_server.name().to_string(),
2045                                        }),
2046                                    })
2047                                    .log_err();
2048                            }
2049
2050                            // Tell the language server about every open buffer in the worktree that matches the language.
2051                            for buffer in this.opened_buffers.values() {
2052                                if let Some(buffer_handle) = buffer.upgrade(cx) {
2053                                    let buffer = buffer_handle.read(cx);
2054                                    let file = if let Some(file) = File::from_dyn(buffer.file()) {
2055                                        file
2056                                    } else {
2057                                        continue;
2058                                    };
2059                                    let language = if let Some(language) = buffer.language() {
2060                                        language
2061                                    } else {
2062                                        continue;
2063                                    };
2064                                    if file.worktree.read(cx).id() != key.0
2065                                        || language.lsp_adapter().map(|a| a.name.clone())
2066                                            != Some(key.1.clone())
2067                                    {
2068                                        continue;
2069                                    }
2070
2071                                    let file = file.as_local()?;
2072                                    let versions = this
2073                                        .buffer_snapshots
2074                                        .entry(buffer.remote_id())
2075                                        .or_insert_with(|| vec![(0, buffer.text_snapshot())]);
2076                                    let (version, initial_snapshot) = versions.last().unwrap();
2077                                    let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
2078                                    language_server
2079                                        .notify::<lsp::notification::DidOpenTextDocument>(
2080                                            lsp::DidOpenTextDocumentParams {
2081                                                text_document: lsp::TextDocumentItem::new(
2082                                                    uri,
2083                                                    adapter
2084                                                        .language_ids
2085                                                        .get(language.name().as_ref())
2086                                                        .cloned()
2087                                                        .unwrap_or_default(),
2088                                                    *version,
2089                                                    initial_snapshot.text(),
2090                                                ),
2091                                            },
2092                                        )
2093                                        .log_err()?;
2094                                    buffer_handle.update(cx, |buffer, cx| {
2095                                        buffer.set_completion_triggers(
2096                                            language_server
2097                                                .capabilities()
2098                                                .completion_provider
2099                                                .as_ref()
2100                                                .and_then(|provider| {
2101                                                    provider.trigger_characters.clone()
2102                                                })
2103                                                .unwrap_or_default(),
2104                                            cx,
2105                                        )
2106                                    });
2107                                }
2108                            }
2109
2110                            cx.notify();
2111                            Some(language_server)
2112                        })
2113                    })),
2114                );
2115
2116                server_id
2117            });
2118    }
2119
2120    // Returns a list of all of the worktrees which no longer have a language server and the root path
2121    // for the stopped server
2122    fn stop_language_server(
2123        &mut self,
2124        worktree_id: WorktreeId,
2125        adapter_name: LanguageServerName,
2126        cx: &mut ModelContext<Self>,
2127    ) -> Task<(Option<PathBuf>, Vec<WorktreeId>)> {
2128        let key = (worktree_id, adapter_name);
2129        if let Some(server_id) = self.language_server_ids.remove(&key) {
2130            // Remove other entries for this language server as well
2131            let mut orphaned_worktrees = vec![worktree_id];
2132            let other_keys = self.language_server_ids.keys().cloned().collect::<Vec<_>>();
2133            for other_key in other_keys {
2134                if self.language_server_ids.get(&other_key) == Some(&server_id) {
2135                    self.language_server_ids.remove(&other_key);
2136                    orphaned_worktrees.push(other_key.0);
2137                }
2138            }
2139
2140            self.language_server_statuses.remove(&server_id);
2141            cx.notify();
2142
2143            let server_state = self.language_servers.remove(&server_id);
2144            cx.spawn_weak(|this, mut cx| async move {
2145                let mut root_path = None;
2146
2147                let server = match server_state {
2148                    Some(LanguageServerState::Starting(started_language_server)) => {
2149                        started_language_server.await
2150                    }
2151                    Some(LanguageServerState::Running { server, .. }) => Some(server),
2152                    None => None,
2153                };
2154
2155                if let Some(server) = server {
2156                    root_path = Some(server.root_path().clone());
2157                    if let Some(shutdown) = server.shutdown() {
2158                        shutdown.await;
2159                    }
2160                }
2161
2162                if let Some(this) = this.upgrade(&cx) {
2163                    this.update(&mut cx, |this, cx| {
2164                        this.language_server_statuses.remove(&server_id);
2165                        cx.notify();
2166                    });
2167                }
2168
2169                (root_path, orphaned_worktrees)
2170            })
2171        } else {
2172            Task::ready((None, Vec::new()))
2173        }
2174    }
2175
2176    pub fn restart_language_servers_for_buffers(
2177        &mut self,
2178        buffers: impl IntoIterator<Item = ModelHandle<Buffer>>,
2179        cx: &mut ModelContext<Self>,
2180    ) -> Option<()> {
2181        let language_server_lookup_info: HashSet<(WorktreeId, Arc<Path>, PathBuf)> = buffers
2182            .into_iter()
2183            .filter_map(|buffer| {
2184                let file = File::from_dyn(buffer.read(cx).file())?;
2185                let worktree = file.worktree.read(cx).as_local()?;
2186                let worktree_id = worktree.id();
2187                let worktree_abs_path = worktree.abs_path().clone();
2188                let full_path = file.full_path(cx);
2189                Some((worktree_id, worktree_abs_path, full_path))
2190            })
2191            .collect();
2192        for (worktree_id, worktree_abs_path, full_path) in language_server_lookup_info {
2193            let language = self.languages.select_language(&full_path)?;
2194            self.restart_language_server(worktree_id, worktree_abs_path, language, cx);
2195        }
2196
2197        None
2198    }
2199
2200    fn restart_language_server(
2201        &mut self,
2202        worktree_id: WorktreeId,
2203        fallback_path: Arc<Path>,
2204        language: Arc<Language>,
2205        cx: &mut ModelContext<Self>,
2206    ) {
2207        let adapter = if let Some(adapter) = language.lsp_adapter() {
2208            adapter
2209        } else {
2210            return;
2211        };
2212
2213        let server_name = adapter.name.clone();
2214        let stop = self.stop_language_server(worktree_id, server_name.clone(), cx);
2215        cx.spawn_weak(|this, mut cx| async move {
2216            let (original_root_path, orphaned_worktrees) = stop.await;
2217            if let Some(this) = this.upgrade(&cx) {
2218                this.update(&mut cx, |this, cx| {
2219                    // Attempt to restart using original server path. Fallback to passed in
2220                    // path if we could not retrieve the root path
2221                    let root_path = original_root_path
2222                        .map(|path_buf| Arc::from(path_buf.as_path()))
2223                        .unwrap_or(fallback_path);
2224
2225                    this.start_language_server(worktree_id, root_path, language, cx);
2226
2227                    // Lookup new server id and set it for each of the orphaned worktrees
2228                    if let Some(new_server_id) = this
2229                        .language_server_ids
2230                        .get(&(worktree_id, server_name.clone()))
2231                        .cloned()
2232                    {
2233                        for orphaned_worktree in orphaned_worktrees {
2234                            this.language_server_ids
2235                                .insert((orphaned_worktree, server_name.clone()), new_server_id);
2236                        }
2237                    }
2238                });
2239            }
2240        })
2241        .detach();
2242    }
2243
2244    fn on_lsp_progress(
2245        &mut self,
2246        progress: lsp::ProgressParams,
2247        server_id: usize,
2248        disk_based_diagnostics_progress_token: Option<String>,
2249        cx: &mut ModelContext<Self>,
2250    ) {
2251        let token = match progress.token {
2252            lsp::NumberOrString::String(token) => token,
2253            lsp::NumberOrString::Number(token) => {
2254                log::info!("skipping numeric progress token {}", token);
2255                return;
2256            }
2257        };
2258        let lsp::ProgressParamsValue::WorkDone(progress) = progress.value;
2259        let language_server_status =
2260            if let Some(status) = self.language_server_statuses.get_mut(&server_id) {
2261                status
2262            } else {
2263                return;
2264            };
2265
2266        if !language_server_status.progress_tokens.contains(&token) {
2267            return;
2268        }
2269
2270        let is_disk_based_diagnostics_progress = disk_based_diagnostics_progress_token
2271            .as_ref()
2272            .map_or(false, |disk_based_token| {
2273                token.starts_with(disk_based_token)
2274            });
2275
2276        match progress {
2277            lsp::WorkDoneProgress::Begin(report) => {
2278                if is_disk_based_diagnostics_progress {
2279                    language_server_status.has_pending_diagnostic_updates = true;
2280                    self.disk_based_diagnostics_started(server_id, cx);
2281                    self.broadcast_language_server_update(
2282                        server_id,
2283                        proto::update_language_server::Variant::DiskBasedDiagnosticsUpdating(
2284                            proto::LspDiskBasedDiagnosticsUpdating {},
2285                        ),
2286                    );
2287                } else {
2288                    self.on_lsp_work_start(
2289                        server_id,
2290                        token.clone(),
2291                        LanguageServerProgress {
2292                            message: report.message.clone(),
2293                            percentage: report.percentage.map(|p| p as usize),
2294                            last_update_at: Instant::now(),
2295                        },
2296                        cx,
2297                    );
2298                    self.broadcast_language_server_update(
2299                        server_id,
2300                        proto::update_language_server::Variant::WorkStart(proto::LspWorkStart {
2301                            token,
2302                            message: report.message,
2303                            percentage: report.percentage.map(|p| p as u32),
2304                        }),
2305                    );
2306                }
2307            }
2308            lsp::WorkDoneProgress::Report(report) => {
2309                if !is_disk_based_diagnostics_progress {
2310                    self.on_lsp_work_progress(
2311                        server_id,
2312                        token.clone(),
2313                        LanguageServerProgress {
2314                            message: report.message.clone(),
2315                            percentage: report.percentage.map(|p| p as usize),
2316                            last_update_at: Instant::now(),
2317                        },
2318                        cx,
2319                    );
2320                    self.broadcast_language_server_update(
2321                        server_id,
2322                        proto::update_language_server::Variant::WorkProgress(
2323                            proto::LspWorkProgress {
2324                                token,
2325                                message: report.message,
2326                                percentage: report.percentage.map(|p| p as u32),
2327                            },
2328                        ),
2329                    );
2330                }
2331            }
2332            lsp::WorkDoneProgress::End(_) => {
2333                language_server_status.progress_tokens.remove(&token);
2334
2335                if is_disk_based_diagnostics_progress {
2336                    language_server_status.has_pending_diagnostic_updates = false;
2337                    self.disk_based_diagnostics_finished(server_id, cx);
2338                    self.broadcast_language_server_update(
2339                        server_id,
2340                        proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(
2341                            proto::LspDiskBasedDiagnosticsUpdated {},
2342                        ),
2343                    );
2344                } else {
2345                    self.on_lsp_work_end(server_id, token.clone(), cx);
2346                    self.broadcast_language_server_update(
2347                        server_id,
2348                        proto::update_language_server::Variant::WorkEnd(proto::LspWorkEnd {
2349                            token,
2350                        }),
2351                    );
2352                }
2353            }
2354        }
2355    }
2356
2357    fn on_lsp_work_start(
2358        &mut self,
2359        language_server_id: usize,
2360        token: String,
2361        progress: LanguageServerProgress,
2362        cx: &mut ModelContext<Self>,
2363    ) {
2364        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2365            status.pending_work.insert(token, progress);
2366            cx.notify();
2367        }
2368    }
2369
2370    fn on_lsp_work_progress(
2371        &mut self,
2372        language_server_id: usize,
2373        token: String,
2374        progress: LanguageServerProgress,
2375        cx: &mut ModelContext<Self>,
2376    ) {
2377        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2378            let entry = status
2379                .pending_work
2380                .entry(token)
2381                .or_insert(LanguageServerProgress {
2382                    message: Default::default(),
2383                    percentage: Default::default(),
2384                    last_update_at: progress.last_update_at,
2385                });
2386            if progress.message.is_some() {
2387                entry.message = progress.message;
2388            }
2389            if progress.percentage.is_some() {
2390                entry.percentage = progress.percentage;
2391            }
2392            entry.last_update_at = progress.last_update_at;
2393            cx.notify();
2394        }
2395    }
2396
2397    fn on_lsp_work_end(
2398        &mut self,
2399        language_server_id: usize,
2400        token: String,
2401        cx: &mut ModelContext<Self>,
2402    ) {
2403        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2404            status.pending_work.remove(&token);
2405            cx.notify();
2406        }
2407    }
2408
2409    async fn on_lsp_workspace_edit(
2410        this: WeakModelHandle<Self>,
2411        params: lsp::ApplyWorkspaceEditParams,
2412        server_id: usize,
2413        adapter: Arc<CachedLspAdapter>,
2414        language_server: Arc<LanguageServer>,
2415        mut cx: AsyncAppContext,
2416    ) -> Result<lsp::ApplyWorkspaceEditResponse> {
2417        let this = this
2418            .upgrade(&cx)
2419            .ok_or_else(|| anyhow!("project project closed"))?;
2420        let transaction = Self::deserialize_workspace_edit(
2421            this.clone(),
2422            params.edit,
2423            true,
2424            adapter.clone(),
2425            language_server.clone(),
2426            &mut cx,
2427        )
2428        .await
2429        .log_err();
2430        this.update(&mut cx, |this, _| {
2431            if let Some(transaction) = transaction {
2432                this.last_workspace_edits_by_language_server
2433                    .insert(server_id, transaction);
2434            }
2435        });
2436        Ok(lsp::ApplyWorkspaceEditResponse {
2437            applied: true,
2438            failed_change: None,
2439            failure_reason: None,
2440        })
2441    }
2442
2443    fn broadcast_language_server_update(
2444        &self,
2445        language_server_id: usize,
2446        event: proto::update_language_server::Variant,
2447    ) {
2448        if let Some(project_id) = self.remote_id() {
2449            self.client
2450                .send(proto::UpdateLanguageServer {
2451                    project_id,
2452                    language_server_id: language_server_id as u64,
2453                    variant: Some(event),
2454                })
2455                .log_err();
2456        }
2457    }
2458
2459    pub fn set_language_server_settings(&mut self, settings: serde_json::Value) {
2460        for server_state in self.language_servers.values() {
2461            if let LanguageServerState::Running { server, .. } = server_state {
2462                server
2463                    .notify::<lsp::notification::DidChangeConfiguration>(
2464                        lsp::DidChangeConfigurationParams {
2465                            settings: settings.clone(),
2466                        },
2467                    )
2468                    .ok();
2469            }
2470        }
2471        *self.language_server_settings.lock() = settings;
2472    }
2473
2474    pub fn language_server_statuses(
2475        &self,
2476    ) -> impl DoubleEndedIterator<Item = &LanguageServerStatus> {
2477        self.language_server_statuses.values()
2478    }
2479
2480    pub fn update_diagnostics(
2481        &mut self,
2482        language_server_id: usize,
2483        params: lsp::PublishDiagnosticsParams,
2484        disk_based_sources: &[String],
2485        cx: &mut ModelContext<Self>,
2486    ) -> Result<()> {
2487        let abs_path = params
2488            .uri
2489            .to_file_path()
2490            .map_err(|_| anyhow!("URI is not a file"))?;
2491        let mut diagnostics = Vec::default();
2492        let mut primary_diagnostic_group_ids = HashMap::default();
2493        let mut sources_by_group_id = HashMap::default();
2494        let mut supporting_diagnostics = HashMap::default();
2495        for diagnostic in &params.diagnostics {
2496            let source = diagnostic.source.as_ref();
2497            let code = diagnostic.code.as_ref().map(|code| match code {
2498                lsp::NumberOrString::Number(code) => code.to_string(),
2499                lsp::NumberOrString::String(code) => code.clone(),
2500            });
2501            let range = range_from_lsp(diagnostic.range);
2502            let is_supporting = diagnostic
2503                .related_information
2504                .as_ref()
2505                .map_or(false, |infos| {
2506                    infos.iter().any(|info| {
2507                        primary_diagnostic_group_ids.contains_key(&(
2508                            source,
2509                            code.clone(),
2510                            range_from_lsp(info.location.range),
2511                        ))
2512                    })
2513                });
2514
2515            let is_unnecessary = diagnostic.tags.as_ref().map_or(false, |tags| {
2516                tags.iter().any(|tag| *tag == DiagnosticTag::UNNECESSARY)
2517            });
2518
2519            if is_supporting {
2520                supporting_diagnostics.insert(
2521                    (source, code.clone(), range),
2522                    (diagnostic.severity, is_unnecessary),
2523                );
2524            } else {
2525                let group_id = post_inc(&mut self.next_diagnostic_group_id);
2526                let is_disk_based =
2527                    source.map_or(false, |source| disk_based_sources.contains(source));
2528
2529                sources_by_group_id.insert(group_id, source);
2530                primary_diagnostic_group_ids
2531                    .insert((source, code.clone(), range.clone()), group_id);
2532
2533                diagnostics.push(DiagnosticEntry {
2534                    range,
2535                    diagnostic: Diagnostic {
2536                        code: code.clone(),
2537                        severity: diagnostic.severity.unwrap_or(DiagnosticSeverity::ERROR),
2538                        message: diagnostic.message.clone(),
2539                        group_id,
2540                        is_primary: true,
2541                        is_valid: true,
2542                        is_disk_based,
2543                        is_unnecessary,
2544                    },
2545                });
2546                if let Some(infos) = &diagnostic.related_information {
2547                    for info in infos {
2548                        if info.location.uri == params.uri && !info.message.is_empty() {
2549                            let range = range_from_lsp(info.location.range);
2550                            diagnostics.push(DiagnosticEntry {
2551                                range,
2552                                diagnostic: Diagnostic {
2553                                    code: code.clone(),
2554                                    severity: DiagnosticSeverity::INFORMATION,
2555                                    message: info.message.clone(),
2556                                    group_id,
2557                                    is_primary: false,
2558                                    is_valid: true,
2559                                    is_disk_based,
2560                                    is_unnecessary: false,
2561                                },
2562                            });
2563                        }
2564                    }
2565                }
2566            }
2567        }
2568
2569        for entry in &mut diagnostics {
2570            let diagnostic = &mut entry.diagnostic;
2571            if !diagnostic.is_primary {
2572                let source = *sources_by_group_id.get(&diagnostic.group_id).unwrap();
2573                if let Some(&(severity, is_unnecessary)) = supporting_diagnostics.get(&(
2574                    source,
2575                    diagnostic.code.clone(),
2576                    entry.range.clone(),
2577                )) {
2578                    if let Some(severity) = severity {
2579                        diagnostic.severity = severity;
2580                    }
2581                    diagnostic.is_unnecessary = is_unnecessary;
2582                }
2583            }
2584        }
2585
2586        self.update_diagnostic_entries(
2587            language_server_id,
2588            abs_path,
2589            params.version,
2590            diagnostics,
2591            cx,
2592        )?;
2593        Ok(())
2594    }
2595
2596    pub fn update_diagnostic_entries(
2597        &mut self,
2598        language_server_id: usize,
2599        abs_path: PathBuf,
2600        version: Option<i32>,
2601        diagnostics: Vec<DiagnosticEntry<PointUtf16>>,
2602        cx: &mut ModelContext<Project>,
2603    ) -> Result<(), anyhow::Error> {
2604        let (worktree, relative_path) = self
2605            .find_local_worktree(&abs_path, cx)
2606            .ok_or_else(|| anyhow!("no worktree found for diagnostics"))?;
2607
2608        let project_path = ProjectPath {
2609            worktree_id: worktree.read(cx).id(),
2610            path: relative_path.into(),
2611        };
2612        if let Some(buffer) = self.get_open_buffer(&project_path, cx) {
2613            self.update_buffer_diagnostics(&buffer, diagnostics.clone(), version, cx)?;
2614        }
2615
2616        let updated = worktree.update(cx, |worktree, cx| {
2617            worktree
2618                .as_local_mut()
2619                .ok_or_else(|| anyhow!("not a local worktree"))?
2620                .update_diagnostics(
2621                    language_server_id,
2622                    project_path.path.clone(),
2623                    diagnostics,
2624                    cx,
2625                )
2626        })?;
2627        if updated {
2628            cx.emit(Event::DiagnosticsUpdated {
2629                language_server_id,
2630                path: project_path,
2631            });
2632        }
2633        Ok(())
2634    }
2635
2636    fn update_buffer_diagnostics(
2637        &mut self,
2638        buffer: &ModelHandle<Buffer>,
2639        mut diagnostics: Vec<DiagnosticEntry<PointUtf16>>,
2640        version: Option<i32>,
2641        cx: &mut ModelContext<Self>,
2642    ) -> Result<()> {
2643        fn compare_diagnostics(a: &Diagnostic, b: &Diagnostic) -> Ordering {
2644            Ordering::Equal
2645                .then_with(|| b.is_primary.cmp(&a.is_primary))
2646                .then_with(|| a.is_disk_based.cmp(&b.is_disk_based))
2647                .then_with(|| a.severity.cmp(&b.severity))
2648                .then_with(|| a.message.cmp(&b.message))
2649        }
2650
2651        let snapshot = self.buffer_snapshot_for_lsp_version(buffer, version, cx)?;
2652
2653        diagnostics.sort_unstable_by(|a, b| {
2654            Ordering::Equal
2655                .then_with(|| a.range.start.cmp(&b.range.start))
2656                .then_with(|| b.range.end.cmp(&a.range.end))
2657                .then_with(|| compare_diagnostics(&a.diagnostic, &b.diagnostic))
2658        });
2659
2660        let mut sanitized_diagnostics = Vec::new();
2661        let edits_since_save = Patch::new(
2662            snapshot
2663                .edits_since::<PointUtf16>(buffer.read(cx).saved_version())
2664                .collect(),
2665        );
2666        for entry in diagnostics {
2667            let start;
2668            let end;
2669            if entry.diagnostic.is_disk_based {
2670                // Some diagnostics are based on files on disk instead of buffers'
2671                // current contents. Adjust these diagnostics' ranges to reflect
2672                // any unsaved edits.
2673                start = edits_since_save.old_to_new(entry.range.start);
2674                end = edits_since_save.old_to_new(entry.range.end);
2675            } else {
2676                start = entry.range.start;
2677                end = entry.range.end;
2678            }
2679
2680            let mut range = snapshot.clip_point_utf16(start, Bias::Left)
2681                ..snapshot.clip_point_utf16(end, Bias::Right);
2682
2683            // Expand empty ranges by one character
2684            if range.start == range.end {
2685                range.end.column += 1;
2686                range.end = snapshot.clip_point_utf16(range.end, Bias::Right);
2687                if range.start == range.end && range.end.column > 0 {
2688                    range.start.column -= 1;
2689                    range.start = snapshot.clip_point_utf16(range.start, Bias::Left);
2690                }
2691            }
2692
2693            sanitized_diagnostics.push(DiagnosticEntry {
2694                range,
2695                diagnostic: entry.diagnostic,
2696            });
2697        }
2698        drop(edits_since_save);
2699
2700        let set = DiagnosticSet::new(sanitized_diagnostics, &snapshot);
2701        buffer.update(cx, |buffer, cx| buffer.update_diagnostics(set, cx));
2702        Ok(())
2703    }
2704
2705    pub fn reload_buffers(
2706        &self,
2707        buffers: HashSet<ModelHandle<Buffer>>,
2708        push_to_history: bool,
2709        cx: &mut ModelContext<Self>,
2710    ) -> Task<Result<ProjectTransaction>> {
2711        let mut local_buffers = Vec::new();
2712        let mut remote_buffers = None;
2713        for buffer_handle in buffers {
2714            let buffer = buffer_handle.read(cx);
2715            if buffer.is_dirty() {
2716                if let Some(file) = File::from_dyn(buffer.file()) {
2717                    if file.is_local() {
2718                        local_buffers.push(buffer_handle);
2719                    } else {
2720                        remote_buffers.get_or_insert(Vec::new()).push(buffer_handle);
2721                    }
2722                }
2723            }
2724        }
2725
2726        let remote_buffers = self.remote_id().zip(remote_buffers);
2727        let client = self.client.clone();
2728
2729        cx.spawn(|this, mut cx| async move {
2730            let mut project_transaction = ProjectTransaction::default();
2731
2732            if let Some((project_id, remote_buffers)) = remote_buffers {
2733                let response = client
2734                    .request(proto::ReloadBuffers {
2735                        project_id,
2736                        buffer_ids: remote_buffers
2737                            .iter()
2738                            .map(|buffer| buffer.read_with(&cx, |buffer, _| buffer.remote_id()))
2739                            .collect(),
2740                    })
2741                    .await?
2742                    .transaction
2743                    .ok_or_else(|| anyhow!("missing transaction"))?;
2744                project_transaction = this
2745                    .update(&mut cx, |this, cx| {
2746                        this.deserialize_project_transaction(response, push_to_history, cx)
2747                    })
2748                    .await?;
2749            }
2750
2751            for buffer in local_buffers {
2752                let transaction = buffer
2753                    .update(&mut cx, |buffer, cx| buffer.reload(cx))
2754                    .await?;
2755                buffer.update(&mut cx, |buffer, cx| {
2756                    if let Some(transaction) = transaction {
2757                        if !push_to_history {
2758                            buffer.forget_transaction(transaction.id);
2759                        }
2760                        project_transaction.0.insert(cx.handle(), transaction);
2761                    }
2762                });
2763            }
2764
2765            Ok(project_transaction)
2766        })
2767    }
2768
2769    pub fn format(
2770        &self,
2771        buffers: HashSet<ModelHandle<Buffer>>,
2772        push_to_history: bool,
2773        trigger: FormatTrigger,
2774        cx: &mut ModelContext<Project>,
2775    ) -> Task<Result<ProjectTransaction>> {
2776        let mut local_buffers = Vec::new();
2777        let mut remote_buffers = None;
2778        for buffer_handle in buffers {
2779            let buffer = buffer_handle.read(cx);
2780            if let Some(file) = File::from_dyn(buffer.file()) {
2781                if let Some(buffer_abs_path) = file.as_local().map(|f| f.abs_path(cx)) {
2782                    if let Some((_, server)) = self.language_server_for_buffer(buffer, cx) {
2783                        local_buffers.push((buffer_handle, buffer_abs_path, server.clone()));
2784                    }
2785                } else {
2786                    remote_buffers.get_or_insert(Vec::new()).push(buffer_handle);
2787                }
2788            } else {
2789                return Task::ready(Ok(Default::default()));
2790            }
2791        }
2792
2793        let remote_buffers = self.remote_id().zip(remote_buffers);
2794        let client = self.client.clone();
2795
2796        cx.spawn(|this, mut cx| async move {
2797            let mut project_transaction = ProjectTransaction::default();
2798
2799            if let Some((project_id, remote_buffers)) = remote_buffers {
2800                let response = client
2801                    .request(proto::FormatBuffers {
2802                        project_id,
2803                        trigger: trigger as i32,
2804                        buffer_ids: remote_buffers
2805                            .iter()
2806                            .map(|buffer| buffer.read_with(&cx, |buffer, _| buffer.remote_id()))
2807                            .collect(),
2808                    })
2809                    .await?
2810                    .transaction
2811                    .ok_or_else(|| anyhow!("missing transaction"))?;
2812                project_transaction = this
2813                    .update(&mut cx, |this, cx| {
2814                        this.deserialize_project_transaction(response, push_to_history, cx)
2815                    })
2816                    .await?;
2817            }
2818
2819            // Do not allow multiple concurrent formatting requests for the
2820            // same buffer.
2821            this.update(&mut cx, |this, _| {
2822                local_buffers
2823                    .retain(|(buffer, _, _)| this.buffers_being_formatted.insert(buffer.id()));
2824            });
2825            let _cleanup = defer({
2826                let this = this.clone();
2827                let mut cx = cx.clone();
2828                let local_buffers = &local_buffers;
2829                move || {
2830                    this.update(&mut cx, |this, _| {
2831                        for (buffer, _, _) in local_buffers {
2832                            this.buffers_being_formatted.remove(&buffer.id());
2833                        }
2834                    });
2835                }
2836            });
2837
2838            for (buffer, buffer_abs_path, language_server) in &local_buffers {
2839                let (format_on_save, formatter, tab_size) = buffer.read_with(&cx, |buffer, cx| {
2840                    let settings = cx.global::<Settings>();
2841                    let language_name = buffer.language().map(|language| language.name());
2842                    (
2843                        settings.format_on_save(language_name.as_deref()),
2844                        settings.formatter(language_name.as_deref()),
2845                        settings.tab_size(language_name.as_deref()),
2846                    )
2847                });
2848
2849                let transaction = match (formatter, format_on_save) {
2850                    (_, FormatOnSave::Off) if trigger == FormatTrigger::Save => continue,
2851
2852                    (Formatter::LanguageServer, FormatOnSave::On | FormatOnSave::Off)
2853                    | (_, FormatOnSave::LanguageServer) => Self::format_via_lsp(
2854                        &this,
2855                        &buffer,
2856                        &buffer_abs_path,
2857                        &language_server,
2858                        tab_size,
2859                        &mut cx,
2860                    )
2861                    .await
2862                    .context("failed to format via language server")?,
2863
2864                    (
2865                        Formatter::External { command, arguments },
2866                        FormatOnSave::On | FormatOnSave::Off,
2867                    )
2868                    | (_, FormatOnSave::External { command, arguments }) => {
2869                        Self::format_via_external_command(
2870                            &buffer,
2871                            &buffer_abs_path,
2872                            &command,
2873                            &arguments,
2874                            &mut cx,
2875                        )
2876                        .await
2877                        .context(format!(
2878                            "failed to format via external command {:?}",
2879                            command
2880                        ))?
2881                    }
2882                };
2883
2884                if let Some(transaction) = transaction {
2885                    if !push_to_history {
2886                        buffer.update(&mut cx, |buffer, _| {
2887                            buffer.forget_transaction(transaction.id)
2888                        });
2889                    }
2890                    project_transaction.0.insert(buffer.clone(), transaction);
2891                }
2892            }
2893
2894            Ok(project_transaction)
2895        })
2896    }
2897
2898    async fn format_via_lsp(
2899        this: &ModelHandle<Self>,
2900        buffer: &ModelHandle<Buffer>,
2901        abs_path: &Path,
2902        language_server: &Arc<LanguageServer>,
2903        tab_size: NonZeroU32,
2904        cx: &mut AsyncAppContext,
2905    ) -> Result<Option<Transaction>> {
2906        let text_document =
2907            lsp::TextDocumentIdentifier::new(lsp::Url::from_file_path(abs_path).unwrap());
2908        let capabilities = &language_server.capabilities();
2909        let lsp_edits = if capabilities
2910            .document_formatting_provider
2911            .as_ref()
2912            .map_or(false, |provider| *provider != lsp::OneOf::Left(false))
2913        {
2914            language_server
2915                .request::<lsp::request::Formatting>(lsp::DocumentFormattingParams {
2916                    text_document,
2917                    options: lsp::FormattingOptions {
2918                        tab_size: tab_size.into(),
2919                        insert_spaces: true,
2920                        insert_final_newline: Some(true),
2921                        ..Default::default()
2922                    },
2923                    work_done_progress_params: Default::default(),
2924                })
2925                .await?
2926        } else if capabilities
2927            .document_range_formatting_provider
2928            .as_ref()
2929            .map_or(false, |provider| *provider != lsp::OneOf::Left(false))
2930        {
2931            let buffer_start = lsp::Position::new(0, 0);
2932            let buffer_end =
2933                buffer.read_with(cx, |buffer, _| point_to_lsp(buffer.max_point_utf16()));
2934            language_server
2935                .request::<lsp::request::RangeFormatting>(lsp::DocumentRangeFormattingParams {
2936                    text_document,
2937                    range: lsp::Range::new(buffer_start, buffer_end),
2938                    options: lsp::FormattingOptions {
2939                        tab_size: tab_size.into(),
2940                        insert_spaces: true,
2941                        insert_final_newline: Some(true),
2942                        ..Default::default()
2943                    },
2944                    work_done_progress_params: Default::default(),
2945                })
2946                .await?
2947        } else {
2948            None
2949        };
2950
2951        if let Some(lsp_edits) = lsp_edits {
2952            let edits = this
2953                .update(cx, |this, cx| {
2954                    this.edits_from_lsp(buffer, lsp_edits, None, cx)
2955                })
2956                .await?;
2957            buffer.update(cx, |buffer, cx| {
2958                buffer.finalize_last_transaction();
2959                buffer.start_transaction();
2960                for (range, text) in edits {
2961                    buffer.edit([(range, text)], None, cx);
2962                }
2963                if buffer.end_transaction(cx).is_some() {
2964                    let transaction = buffer.finalize_last_transaction().unwrap().clone();
2965                    Ok(Some(transaction))
2966                } else {
2967                    Ok(None)
2968                }
2969            })
2970        } else {
2971            Ok(None)
2972        }
2973    }
2974
2975    async fn format_via_external_command(
2976        buffer: &ModelHandle<Buffer>,
2977        buffer_abs_path: &Path,
2978        command: &str,
2979        arguments: &[String],
2980        cx: &mut AsyncAppContext,
2981    ) -> Result<Option<Transaction>> {
2982        let working_dir_path = buffer.read_with(cx, |buffer, cx| {
2983            let file = File::from_dyn(buffer.file())?;
2984            let worktree = file.worktree.read(cx).as_local()?;
2985            let mut worktree_path = worktree.abs_path().to_path_buf();
2986            if worktree.root_entry()?.is_file() {
2987                worktree_path.pop();
2988            }
2989            Some(worktree_path)
2990        });
2991
2992        if let Some(working_dir_path) = working_dir_path {
2993            let mut child =
2994                smol::process::Command::new(command)
2995                    .args(arguments.iter().map(|arg| {
2996                        arg.replace("{buffer_path}", &buffer_abs_path.to_string_lossy())
2997                    }))
2998                    .current_dir(&working_dir_path)
2999                    .stdin(smol::process::Stdio::piped())
3000                    .stdout(smol::process::Stdio::piped())
3001                    .stderr(smol::process::Stdio::piped())
3002                    .spawn()?;
3003            let stdin = child
3004                .stdin
3005                .as_mut()
3006                .ok_or_else(|| anyhow!("failed to acquire stdin"))?;
3007            let text = buffer.read_with(cx, |buffer, _| buffer.as_rope().clone());
3008            for chunk in text.chunks() {
3009                stdin.write_all(chunk.as_bytes()).await?;
3010            }
3011            stdin.flush().await?;
3012
3013            let output = child.output().await?;
3014            if !output.status.success() {
3015                return Err(anyhow!(
3016                    "command failed with exit code {:?}:\nstdout: {}\nstderr: {}",
3017                    output.status.code(),
3018                    String::from_utf8_lossy(&output.stdout),
3019                    String::from_utf8_lossy(&output.stderr),
3020                ));
3021            }
3022
3023            let stdout = String::from_utf8(output.stdout)?;
3024            let diff = buffer
3025                .read_with(cx, |buffer, cx| buffer.diff(stdout, cx))
3026                .await;
3027            Ok(buffer.update(cx, |buffer, cx| buffer.apply_diff(diff, cx).cloned()))
3028        } else {
3029            Ok(None)
3030        }
3031    }
3032
3033    pub fn definition<T: ToPointUtf16>(
3034        &self,
3035        buffer: &ModelHandle<Buffer>,
3036        position: T,
3037        cx: &mut ModelContext<Self>,
3038    ) -> Task<Result<Vec<LocationLink>>> {
3039        let position = position.to_point_utf16(buffer.read(cx));
3040        self.request_lsp(buffer.clone(), GetDefinition { position }, cx)
3041    }
3042
3043    pub fn type_definition<T: ToPointUtf16>(
3044        &self,
3045        buffer: &ModelHandle<Buffer>,
3046        position: T,
3047        cx: &mut ModelContext<Self>,
3048    ) -> Task<Result<Vec<LocationLink>>> {
3049        let position = position.to_point_utf16(buffer.read(cx));
3050        self.request_lsp(buffer.clone(), GetTypeDefinition { position }, cx)
3051    }
3052
3053    pub fn references<T: ToPointUtf16>(
3054        &self,
3055        buffer: &ModelHandle<Buffer>,
3056        position: T,
3057        cx: &mut ModelContext<Self>,
3058    ) -> Task<Result<Vec<Location>>> {
3059        let position = position.to_point_utf16(buffer.read(cx));
3060        self.request_lsp(buffer.clone(), GetReferences { position }, cx)
3061    }
3062
3063    pub fn document_highlights<T: ToPointUtf16>(
3064        &self,
3065        buffer: &ModelHandle<Buffer>,
3066        position: T,
3067        cx: &mut ModelContext<Self>,
3068    ) -> Task<Result<Vec<DocumentHighlight>>> {
3069        let position = position.to_point_utf16(buffer.read(cx));
3070        self.request_lsp(buffer.clone(), GetDocumentHighlights { position }, cx)
3071    }
3072
3073    pub fn symbols(&self, query: &str, cx: &mut ModelContext<Self>) -> Task<Result<Vec<Symbol>>> {
3074        if self.is_local() {
3075            let mut requests = Vec::new();
3076            for ((worktree_id, _), server_id) in self.language_server_ids.iter() {
3077                let worktree_id = *worktree_id;
3078                if let Some(worktree) = self
3079                    .worktree_for_id(worktree_id, cx)
3080                    .and_then(|worktree| worktree.read(cx).as_local())
3081                {
3082                    if let Some(LanguageServerState::Running {
3083                        adapter,
3084                        language,
3085                        server,
3086                    }) = self.language_servers.get(server_id)
3087                    {
3088                        let adapter = adapter.clone();
3089                        let language = language.clone();
3090                        let worktree_abs_path = worktree.abs_path().clone();
3091                        requests.push(
3092                            server
3093                                .request::<lsp::request::WorkspaceSymbol>(
3094                                    lsp::WorkspaceSymbolParams {
3095                                        query: query.to_string(),
3096                                        ..Default::default()
3097                                    },
3098                                )
3099                                .log_err()
3100                                .map(move |response| {
3101                                    (
3102                                        adapter,
3103                                        language,
3104                                        worktree_id,
3105                                        worktree_abs_path,
3106                                        response.unwrap_or_default(),
3107                                    )
3108                                }),
3109                        );
3110                    }
3111                }
3112            }
3113
3114            cx.spawn_weak(|this, cx| async move {
3115                let responses = futures::future::join_all(requests).await;
3116                let this = if let Some(this) = this.upgrade(&cx) {
3117                    this
3118                } else {
3119                    return Ok(Default::default());
3120                };
3121                let symbols = this.read_with(&cx, |this, cx| {
3122                    let mut symbols = Vec::new();
3123                    for (
3124                        adapter,
3125                        adapter_language,
3126                        source_worktree_id,
3127                        worktree_abs_path,
3128                        response,
3129                    ) in responses
3130                    {
3131                        symbols.extend(response.into_iter().flatten().filter_map(|lsp_symbol| {
3132                            let abs_path = lsp_symbol.location.uri.to_file_path().ok()?;
3133                            let mut worktree_id = source_worktree_id;
3134                            let path;
3135                            if let Some((worktree, rel_path)) =
3136                                this.find_local_worktree(&abs_path, cx)
3137                            {
3138                                worktree_id = worktree.read(cx).id();
3139                                path = rel_path;
3140                            } else {
3141                                path = relativize_path(&worktree_abs_path, &abs_path);
3142                            }
3143
3144                            let project_path = ProjectPath {
3145                                worktree_id,
3146                                path: path.into(),
3147                            };
3148                            let signature = this.symbol_signature(&project_path);
3149                            let language = this
3150                                .languages
3151                                .select_language(&project_path.path)
3152                                .unwrap_or(adapter_language.clone());
3153                            let language_server_name = adapter.name.clone();
3154                            Some(async move {
3155                                let label = language
3156                                    .label_for_symbol(&lsp_symbol.name, lsp_symbol.kind)
3157                                    .await;
3158
3159                                Symbol {
3160                                    language_server_name,
3161                                    source_worktree_id,
3162                                    path: project_path,
3163                                    label: label.unwrap_or_else(|| {
3164                                        CodeLabel::plain(lsp_symbol.name.clone(), None)
3165                                    }),
3166                                    kind: lsp_symbol.kind,
3167                                    name: lsp_symbol.name,
3168                                    range: range_from_lsp(lsp_symbol.location.range),
3169                                    signature,
3170                                }
3171                            })
3172                        }));
3173                    }
3174                    symbols
3175                });
3176                Ok(futures::future::join_all(symbols).await)
3177            })
3178        } else if let Some(project_id) = self.remote_id() {
3179            let request = self.client.request(proto::GetProjectSymbols {
3180                project_id,
3181                query: query.to_string(),
3182            });
3183            cx.spawn_weak(|this, cx| async move {
3184                let response = request.await?;
3185                let mut symbols = Vec::new();
3186                if let Some(this) = this.upgrade(&cx) {
3187                    let new_symbols = this.read_with(&cx, |this, _| {
3188                        response
3189                            .symbols
3190                            .into_iter()
3191                            .map(|symbol| this.deserialize_symbol(symbol))
3192                            .collect::<Vec<_>>()
3193                    });
3194                    symbols = futures::future::join_all(new_symbols)
3195                        .await
3196                        .into_iter()
3197                        .filter_map(|symbol| symbol.log_err())
3198                        .collect::<Vec<_>>();
3199                }
3200                Ok(symbols)
3201            })
3202        } else {
3203            Task::ready(Ok(Default::default()))
3204        }
3205    }
3206
3207    pub fn open_buffer_for_symbol(
3208        &mut self,
3209        symbol: &Symbol,
3210        cx: &mut ModelContext<Self>,
3211    ) -> Task<Result<ModelHandle<Buffer>>> {
3212        if self.is_local() {
3213            let language_server_id = if let Some(id) = self.language_server_ids.get(&(
3214                symbol.source_worktree_id,
3215                symbol.language_server_name.clone(),
3216            )) {
3217                *id
3218            } else {
3219                return Task::ready(Err(anyhow!(
3220                    "language server for worktree and language not found"
3221                )));
3222            };
3223
3224            let worktree_abs_path = if let Some(worktree_abs_path) = self
3225                .worktree_for_id(symbol.path.worktree_id, cx)
3226                .and_then(|worktree| worktree.read(cx).as_local())
3227                .map(|local_worktree| local_worktree.abs_path())
3228            {
3229                worktree_abs_path
3230            } else {
3231                return Task::ready(Err(anyhow!("worktree not found for symbol")));
3232            };
3233            let symbol_abs_path = worktree_abs_path.join(&symbol.path.path);
3234            let symbol_uri = if let Ok(uri) = lsp::Url::from_file_path(symbol_abs_path) {
3235                uri
3236            } else {
3237                return Task::ready(Err(anyhow!("invalid symbol path")));
3238            };
3239
3240            self.open_local_buffer_via_lsp(
3241                symbol_uri,
3242                language_server_id,
3243                symbol.language_server_name.clone(),
3244                cx,
3245            )
3246        } else if let Some(project_id) = self.remote_id() {
3247            let request = self.client.request(proto::OpenBufferForSymbol {
3248                project_id,
3249                symbol: Some(serialize_symbol(symbol)),
3250            });
3251            cx.spawn(|this, mut cx| async move {
3252                let response = request.await?;
3253                this.update(&mut cx, |this, cx| {
3254                    this.wait_for_buffer(response.buffer_id, cx)
3255                })
3256                .await
3257            })
3258        } else {
3259            Task::ready(Err(anyhow!("project does not have a remote id")))
3260        }
3261    }
3262
3263    pub fn hover<T: ToPointUtf16>(
3264        &self,
3265        buffer: &ModelHandle<Buffer>,
3266        position: T,
3267        cx: &mut ModelContext<Self>,
3268    ) -> Task<Result<Option<Hover>>> {
3269        let position = position.to_point_utf16(buffer.read(cx));
3270        self.request_lsp(buffer.clone(), GetHover { position }, cx)
3271    }
3272
3273    pub fn completions<T: ToPointUtf16>(
3274        &self,
3275        source_buffer_handle: &ModelHandle<Buffer>,
3276        position: T,
3277        cx: &mut ModelContext<Self>,
3278    ) -> Task<Result<Vec<Completion>>> {
3279        let source_buffer_handle = source_buffer_handle.clone();
3280        let source_buffer = source_buffer_handle.read(cx);
3281        let buffer_id = source_buffer.remote_id();
3282        let language = source_buffer.language().cloned();
3283        let worktree;
3284        let buffer_abs_path;
3285        if let Some(file) = File::from_dyn(source_buffer.file()) {
3286            worktree = file.worktree.clone();
3287            buffer_abs_path = file.as_local().map(|f| f.abs_path(cx));
3288        } else {
3289            return Task::ready(Ok(Default::default()));
3290        };
3291
3292        let position = position.to_point_utf16(source_buffer);
3293        let anchor = source_buffer.clamped_anchor_after(position);
3294
3295        if worktree.read(cx).as_local().is_some() {
3296            let buffer_abs_path = buffer_abs_path.unwrap();
3297            let lang_server =
3298                if let Some((_, server)) = self.language_server_for_buffer(source_buffer, cx) {
3299                    server.clone()
3300                } else {
3301                    return Task::ready(Ok(Default::default()));
3302                };
3303
3304            cx.spawn(|_, cx| async move {
3305                let completions = lang_server
3306                    .request::<lsp::request::Completion>(lsp::CompletionParams {
3307                        text_document_position: lsp::TextDocumentPositionParams::new(
3308                            lsp::TextDocumentIdentifier::new(
3309                                lsp::Url::from_file_path(buffer_abs_path).unwrap(),
3310                            ),
3311                            point_to_lsp(position),
3312                        ),
3313                        context: Default::default(),
3314                        work_done_progress_params: Default::default(),
3315                        partial_result_params: Default::default(),
3316                    })
3317                    .await
3318                    .context("lsp completion request failed")?;
3319
3320                let completions = if let Some(completions) = completions {
3321                    match completions {
3322                        lsp::CompletionResponse::Array(completions) => completions,
3323                        lsp::CompletionResponse::List(list) => list.items,
3324                    }
3325                } else {
3326                    Default::default()
3327                };
3328
3329                let completions = source_buffer_handle.read_with(&cx, |this, _| {
3330                    let snapshot = this.snapshot();
3331                    let clipped_position = this.clip_point_utf16(position, Bias::Left);
3332                    let mut range_for_token = None;
3333                    completions
3334                        .into_iter()
3335                        .filter_map(move |mut lsp_completion| {
3336                            // For now, we can only handle additional edits if they are returned
3337                            // when resolving the completion, not if they are present initially.
3338                            if lsp_completion
3339                                .additional_text_edits
3340                                .as_ref()
3341                                .map_or(false, |edits| !edits.is_empty())
3342                            {
3343                                return None;
3344                            }
3345
3346                            let (old_range, mut new_text) = match lsp_completion.text_edit.as_ref()
3347                            {
3348                                // If the language server provides a range to overwrite, then
3349                                // check that the range is valid.
3350                                Some(lsp::CompletionTextEdit::Edit(edit)) => {
3351                                    let range = range_from_lsp(edit.range);
3352                                    let start = snapshot.clip_point_utf16(range.start, Bias::Left);
3353                                    let end = snapshot.clip_point_utf16(range.end, Bias::Left);
3354                                    if start != range.start || end != range.end {
3355                                        log::info!("completion out of expected range");
3356                                        return None;
3357                                    }
3358                                    (
3359                                        snapshot.clamped_anchor_before(start)..snapshot.clamped_anchor_after(end),
3360                                        edit.new_text.clone(),
3361                                    )
3362                                }
3363                                // If the language server does not provide a range, then infer
3364                                // the range based on the syntax tree.
3365                                None => {
3366                                    if position != clipped_position {
3367                                        log::info!("completion out of expected range");
3368                                        return None;
3369                                    }
3370                                    let Range { start, end } = range_for_token
3371                                        .get_or_insert_with(|| {
3372                                            let offset = position.to_offset_clamped(&snapshot);
3373                                            let (range, kind) = snapshot.surrounding_word(offset);
3374                                            if kind == Some(CharKind::Word) {
3375                                                range
3376                                            } else {
3377                                                offset..offset
3378                                            }
3379                                        })
3380                                        .clone();
3381                                    let text = lsp_completion
3382                                        .insert_text
3383                                        .as_ref()
3384                                        .unwrap_or(&lsp_completion.label)
3385                                        .clone();
3386                                    (
3387                                        snapshot.anchor_before(start)..snapshot.anchor_after(end),
3388                                        text,
3389                                    )
3390                                }
3391                                Some(lsp::CompletionTextEdit::InsertAndReplace(_)) => {
3392                                    log::info!("unsupported insert/replace completion");
3393                                    return None;
3394                                }
3395                            };
3396
3397                            LineEnding::normalize(&mut new_text);
3398                            let language = language.clone();
3399                            Some(async move {
3400                                let mut label = None;
3401                                if let Some(language) = language {
3402                                    language.process_completion(&mut lsp_completion).await;
3403                                    label = language.label_for_completion(&lsp_completion).await;
3404                                }
3405                                Completion {
3406                                    old_range,
3407                                    new_text,
3408                                    label: label.unwrap_or_else(|| {
3409                                        CodeLabel::plain(
3410                                            lsp_completion.label.clone(),
3411                                            lsp_completion.filter_text.as_deref(),
3412                                        )
3413                                    }),
3414                                    lsp_completion,
3415                                }
3416                            })
3417                        })
3418                });
3419
3420                Ok(futures::future::join_all(completions).await)
3421            })
3422        } else if let Some(project_id) = self.remote_id() {
3423            let rpc = self.client.clone();
3424            let message = proto::GetCompletions {
3425                project_id,
3426                buffer_id,
3427                position: Some(language::proto::serialize_anchor(&anchor)),
3428                version: serialize_version(&source_buffer.version()),
3429            };
3430            cx.spawn_weak(|_, mut cx| async move {
3431                let response = rpc.request(message).await?;
3432
3433                source_buffer_handle
3434                    .update(&mut cx, |buffer, _| {
3435                        buffer.wait_for_version(deserialize_version(response.version))
3436                    })
3437                    .await;
3438
3439                let completions = response.completions.into_iter().map(|completion| {
3440                    language::proto::deserialize_completion(completion, language.clone())
3441                });
3442                futures::future::try_join_all(completions).await
3443            })
3444        } else {
3445            Task::ready(Ok(Default::default()))
3446        }
3447    }
3448
3449    pub fn apply_additional_edits_for_completion(
3450        &self,
3451        buffer_handle: ModelHandle<Buffer>,
3452        completion: Completion,
3453        push_to_history: bool,
3454        cx: &mut ModelContext<Self>,
3455    ) -> Task<Result<Option<Transaction>>> {
3456        let buffer = buffer_handle.read(cx);
3457        let buffer_id = buffer.remote_id();
3458
3459        if self.is_local() {
3460            let lang_server = match self.language_server_for_buffer(buffer, cx) {
3461                Some((_, server)) => server.clone(),
3462                _ => return Task::ready(Ok(Default::default())),
3463            };
3464
3465            cx.spawn(|this, mut cx| async move {
3466                let resolved_completion = lang_server
3467                    .request::<lsp::request::ResolveCompletionItem>(completion.lsp_completion)
3468                    .await?;
3469
3470                if let Some(edits) = resolved_completion.additional_text_edits {
3471                    let edits = this
3472                        .update(&mut cx, |this, cx| {
3473                            this.edits_from_lsp(&buffer_handle, edits, None, cx)
3474                        })
3475                        .await?;
3476
3477                    buffer_handle.update(&mut cx, |buffer, cx| {
3478                        buffer.finalize_last_transaction();
3479                        buffer.start_transaction();
3480
3481                        for (range, text) in edits {
3482                            let primary = &completion.old_range;
3483                            let start_within = primary.start.cmp(&range.start, buffer).is_le()
3484                                && primary.end.cmp(&range.start, buffer).is_ge();
3485                            let end_within = range.start.cmp(&primary.end, buffer).is_le()
3486                                && range.end.cmp(&primary.end, buffer).is_ge();
3487
3488                            //Skip addtional edits which overlap with the primary completion edit
3489                            //https://github.com/zed-industries/zed/pull/1871
3490                            if !start_within && !end_within {
3491                                buffer.edit([(range, text)], None, cx);
3492                            }
3493                        }
3494
3495                        let transaction = if buffer.end_transaction(cx).is_some() {
3496                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
3497                            if !push_to_history {
3498                                buffer.forget_transaction(transaction.id);
3499                            }
3500                            Some(transaction)
3501                        } else {
3502                            None
3503                        };
3504                        Ok(transaction)
3505                    })
3506                } else {
3507                    Ok(None)
3508                }
3509            })
3510        } else if let Some(project_id) = self.remote_id() {
3511            let client = self.client.clone();
3512            cx.spawn(|_, mut cx| async move {
3513                let response = client
3514                    .request(proto::ApplyCompletionAdditionalEdits {
3515                        project_id,
3516                        buffer_id,
3517                        completion: Some(language::proto::serialize_completion(&completion)),
3518                    })
3519                    .await?;
3520
3521                if let Some(transaction) = response.transaction {
3522                    let transaction = language::proto::deserialize_transaction(transaction)?;
3523                    buffer_handle
3524                        .update(&mut cx, |buffer, _| {
3525                            buffer.wait_for_edits(transaction.edit_ids.iter().copied())
3526                        })
3527                        .await;
3528                    if push_to_history {
3529                        buffer_handle.update(&mut cx, |buffer, _| {
3530                            buffer.push_transaction(transaction.clone(), Instant::now());
3531                        });
3532                    }
3533                    Ok(Some(transaction))
3534                } else {
3535                    Ok(None)
3536                }
3537            })
3538        } else {
3539            Task::ready(Err(anyhow!("project does not have a remote id")))
3540        }
3541    }
3542
3543    pub fn code_actions<T: Clone + ToOffset>(
3544        &self,
3545        buffer_handle: &ModelHandle<Buffer>,
3546        range: Range<T>,
3547        cx: &mut ModelContext<Self>,
3548    ) -> Task<Result<Vec<CodeAction>>> {
3549        let buffer_handle = buffer_handle.clone();
3550        let buffer = buffer_handle.read(cx);
3551        let snapshot = buffer.snapshot();
3552        let relevant_diagnostics = snapshot
3553            .diagnostics_in_range::<usize, usize>(range.to_offset(&snapshot), false)
3554            .map(|entry| entry.to_lsp_diagnostic_stub())
3555            .collect();
3556        let buffer_id = buffer.remote_id();
3557        let worktree;
3558        let buffer_abs_path;
3559        if let Some(file) = File::from_dyn(buffer.file()) {
3560            worktree = file.worktree.clone();
3561            buffer_abs_path = file.as_local().map(|f| f.abs_path(cx));
3562        } else {
3563            return Task::ready(Ok(Default::default()));
3564        };
3565        let range = buffer.anchor_before(range.start)..buffer.anchor_before(range.end);
3566
3567        if worktree.read(cx).as_local().is_some() {
3568            let buffer_abs_path = buffer_abs_path.unwrap();
3569            let lang_server = if let Some((_, server)) = self.language_server_for_buffer(buffer, cx)
3570            {
3571                server.clone()
3572            } else {
3573                return Task::ready(Ok(Default::default()));
3574            };
3575
3576            let lsp_range = range_to_lsp(range.to_point_utf16(buffer));
3577            cx.foreground().spawn(async move {
3578                if lang_server.capabilities().code_action_provider.is_none() {
3579                    return Ok(Default::default());
3580                }
3581
3582                Ok(lang_server
3583                    .request::<lsp::request::CodeActionRequest>(lsp::CodeActionParams {
3584                        text_document: lsp::TextDocumentIdentifier::new(
3585                            lsp::Url::from_file_path(buffer_abs_path).unwrap(),
3586                        ),
3587                        range: lsp_range,
3588                        work_done_progress_params: Default::default(),
3589                        partial_result_params: Default::default(),
3590                        context: lsp::CodeActionContext {
3591                            diagnostics: relevant_diagnostics,
3592                            only: Some(vec![
3593                                lsp::CodeActionKind::EMPTY,
3594                                lsp::CodeActionKind::QUICKFIX,
3595                                lsp::CodeActionKind::REFACTOR,
3596                                lsp::CodeActionKind::REFACTOR_EXTRACT,
3597                                lsp::CodeActionKind::SOURCE,
3598                            ]),
3599                        },
3600                    })
3601                    .await?
3602                    .unwrap_or_default()
3603                    .into_iter()
3604                    .filter_map(|entry| {
3605                        if let lsp::CodeActionOrCommand::CodeAction(lsp_action) = entry {
3606                            Some(CodeAction {
3607                                range: range.clone(),
3608                                lsp_action,
3609                            })
3610                        } else {
3611                            None
3612                        }
3613                    })
3614                    .collect())
3615            })
3616        } else if let Some(project_id) = self.remote_id() {
3617            let rpc = self.client.clone();
3618            let version = buffer.version();
3619            cx.spawn_weak(|_, mut cx| async move {
3620                let response = rpc
3621                    .request(proto::GetCodeActions {
3622                        project_id,
3623                        buffer_id,
3624                        start: Some(language::proto::serialize_anchor(&range.start)),
3625                        end: Some(language::proto::serialize_anchor(&range.end)),
3626                        version: serialize_version(&version),
3627                    })
3628                    .await?;
3629
3630                buffer_handle
3631                    .update(&mut cx, |buffer, _| {
3632                        buffer.wait_for_version(deserialize_version(response.version))
3633                    })
3634                    .await;
3635
3636                response
3637                    .actions
3638                    .into_iter()
3639                    .map(language::proto::deserialize_code_action)
3640                    .collect()
3641            })
3642        } else {
3643            Task::ready(Ok(Default::default()))
3644        }
3645    }
3646
3647    pub fn apply_code_action(
3648        &self,
3649        buffer_handle: ModelHandle<Buffer>,
3650        mut action: CodeAction,
3651        push_to_history: bool,
3652        cx: &mut ModelContext<Self>,
3653    ) -> Task<Result<ProjectTransaction>> {
3654        if self.is_local() {
3655            let buffer = buffer_handle.read(cx);
3656            let (lsp_adapter, lang_server) =
3657                if let Some((adapter, server)) = self.language_server_for_buffer(buffer, cx) {
3658                    (adapter.clone(), server.clone())
3659                } else {
3660                    return Task::ready(Ok(Default::default()));
3661                };
3662            let range = action.range.to_point_utf16(buffer);
3663
3664            cx.spawn(|this, mut cx| async move {
3665                if let Some(lsp_range) = action
3666                    .lsp_action
3667                    .data
3668                    .as_mut()
3669                    .and_then(|d| d.get_mut("codeActionParams"))
3670                    .and_then(|d| d.get_mut("range"))
3671                {
3672                    *lsp_range = serde_json::to_value(&range_to_lsp(range)).unwrap();
3673                    action.lsp_action = lang_server
3674                        .request::<lsp::request::CodeActionResolveRequest>(action.lsp_action)
3675                        .await?;
3676                } else {
3677                    let actions = this
3678                        .update(&mut cx, |this, cx| {
3679                            this.code_actions(&buffer_handle, action.range, cx)
3680                        })
3681                        .await?;
3682                    action.lsp_action = actions
3683                        .into_iter()
3684                        .find(|a| a.lsp_action.title == action.lsp_action.title)
3685                        .ok_or_else(|| anyhow!("code action is outdated"))?
3686                        .lsp_action;
3687                }
3688
3689                if let Some(edit) = action.lsp_action.edit {
3690                    if edit.changes.is_some() || edit.document_changes.is_some() {
3691                        return Self::deserialize_workspace_edit(
3692                            this,
3693                            edit,
3694                            push_to_history,
3695                            lsp_adapter.clone(),
3696                            lang_server.clone(),
3697                            &mut cx,
3698                        )
3699                        .await;
3700                    }
3701                }
3702
3703                if let Some(command) = action.lsp_action.command {
3704                    this.update(&mut cx, |this, _| {
3705                        this.last_workspace_edits_by_language_server
3706                            .remove(&lang_server.server_id());
3707                    });
3708                    lang_server
3709                        .request::<lsp::request::ExecuteCommand>(lsp::ExecuteCommandParams {
3710                            command: command.command,
3711                            arguments: command.arguments.unwrap_or_default(),
3712                            ..Default::default()
3713                        })
3714                        .await?;
3715                    return Ok(this.update(&mut cx, |this, _| {
3716                        this.last_workspace_edits_by_language_server
3717                            .remove(&lang_server.server_id())
3718                            .unwrap_or_default()
3719                    }));
3720                }
3721
3722                Ok(ProjectTransaction::default())
3723            })
3724        } else if let Some(project_id) = self.remote_id() {
3725            let client = self.client.clone();
3726            let request = proto::ApplyCodeAction {
3727                project_id,
3728                buffer_id: buffer_handle.read(cx).remote_id(),
3729                action: Some(language::proto::serialize_code_action(&action)),
3730            };
3731            cx.spawn(|this, mut cx| async move {
3732                let response = client
3733                    .request(request)
3734                    .await?
3735                    .transaction
3736                    .ok_or_else(|| anyhow!("missing transaction"))?;
3737                this.update(&mut cx, |this, cx| {
3738                    this.deserialize_project_transaction(response, push_to_history, cx)
3739                })
3740                .await
3741            })
3742        } else {
3743            Task::ready(Err(anyhow!("project does not have a remote id")))
3744        }
3745    }
3746
3747    async fn deserialize_workspace_edit(
3748        this: ModelHandle<Self>,
3749        edit: lsp::WorkspaceEdit,
3750        push_to_history: bool,
3751        lsp_adapter: Arc<CachedLspAdapter>,
3752        language_server: Arc<LanguageServer>,
3753        cx: &mut AsyncAppContext,
3754    ) -> Result<ProjectTransaction> {
3755        let fs = this.read_with(cx, |this, _| this.fs.clone());
3756        let mut operations = Vec::new();
3757        if let Some(document_changes) = edit.document_changes {
3758            match document_changes {
3759                lsp::DocumentChanges::Edits(edits) => {
3760                    operations.extend(edits.into_iter().map(lsp::DocumentChangeOperation::Edit))
3761                }
3762                lsp::DocumentChanges::Operations(ops) => operations = ops,
3763            }
3764        } else if let Some(changes) = edit.changes {
3765            operations.extend(changes.into_iter().map(|(uri, edits)| {
3766                lsp::DocumentChangeOperation::Edit(lsp::TextDocumentEdit {
3767                    text_document: lsp::OptionalVersionedTextDocumentIdentifier {
3768                        uri,
3769                        version: None,
3770                    },
3771                    edits: edits.into_iter().map(lsp::OneOf::Left).collect(),
3772                })
3773            }));
3774        }
3775
3776        let mut project_transaction = ProjectTransaction::default();
3777        for operation in operations {
3778            match operation {
3779                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Create(op)) => {
3780                    let abs_path = op
3781                        .uri
3782                        .to_file_path()
3783                        .map_err(|_| anyhow!("can't convert URI to path"))?;
3784
3785                    if let Some(parent_path) = abs_path.parent() {
3786                        fs.create_dir(parent_path).await?;
3787                    }
3788                    if abs_path.ends_with("/") {
3789                        fs.create_dir(&abs_path).await?;
3790                    } else {
3791                        fs.create_file(&abs_path, op.options.map(Into::into).unwrap_or_default())
3792                            .await?;
3793                    }
3794                }
3795                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Rename(op)) => {
3796                    let source_abs_path = op
3797                        .old_uri
3798                        .to_file_path()
3799                        .map_err(|_| anyhow!("can't convert URI to path"))?;
3800                    let target_abs_path = op
3801                        .new_uri
3802                        .to_file_path()
3803                        .map_err(|_| anyhow!("can't convert URI to path"))?;
3804                    fs.rename(
3805                        &source_abs_path,
3806                        &target_abs_path,
3807                        op.options.map(Into::into).unwrap_or_default(),
3808                    )
3809                    .await?;
3810                }
3811                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Delete(op)) => {
3812                    let abs_path = op
3813                        .uri
3814                        .to_file_path()
3815                        .map_err(|_| anyhow!("can't convert URI to path"))?;
3816                    let options = op.options.map(Into::into).unwrap_or_default();
3817                    if abs_path.ends_with("/") {
3818                        fs.remove_dir(&abs_path, options).await?;
3819                    } else {
3820                        fs.remove_file(&abs_path, options).await?;
3821                    }
3822                }
3823                lsp::DocumentChangeOperation::Edit(op) => {
3824                    let buffer_to_edit = this
3825                        .update(cx, |this, cx| {
3826                            this.open_local_buffer_via_lsp(
3827                                op.text_document.uri,
3828                                language_server.server_id(),
3829                                lsp_adapter.name.clone(),
3830                                cx,
3831                            )
3832                        })
3833                        .await?;
3834
3835                    let edits = this
3836                        .update(cx, |this, cx| {
3837                            let edits = op.edits.into_iter().map(|edit| match edit {
3838                                lsp::OneOf::Left(edit) => edit,
3839                                lsp::OneOf::Right(edit) => edit.text_edit,
3840                            });
3841                            this.edits_from_lsp(
3842                                &buffer_to_edit,
3843                                edits,
3844                                op.text_document.version,
3845                                cx,
3846                            )
3847                        })
3848                        .await?;
3849
3850                    let transaction = buffer_to_edit.update(cx, |buffer, cx| {
3851                        buffer.finalize_last_transaction();
3852                        buffer.start_transaction();
3853                        for (range, text) in edits {
3854                            buffer.edit([(range, text)], None, cx);
3855                        }
3856                        let transaction = if buffer.end_transaction(cx).is_some() {
3857                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
3858                            if !push_to_history {
3859                                buffer.forget_transaction(transaction.id);
3860                            }
3861                            Some(transaction)
3862                        } else {
3863                            None
3864                        };
3865
3866                        transaction
3867                    });
3868                    if let Some(transaction) = transaction {
3869                        project_transaction.0.insert(buffer_to_edit, transaction);
3870                    }
3871                }
3872            }
3873        }
3874
3875        Ok(project_transaction)
3876    }
3877
3878    pub fn prepare_rename<T: ToPointUtf16>(
3879        &self,
3880        buffer: ModelHandle<Buffer>,
3881        position: T,
3882        cx: &mut ModelContext<Self>,
3883    ) -> Task<Result<Option<Range<Anchor>>>> {
3884        let position = position.to_point_utf16(buffer.read(cx));
3885        self.request_lsp(buffer, PrepareRename { position }, cx)
3886    }
3887
3888    pub fn perform_rename<T: ToPointUtf16>(
3889        &self,
3890        buffer: ModelHandle<Buffer>,
3891        position: T,
3892        new_name: String,
3893        push_to_history: bool,
3894        cx: &mut ModelContext<Self>,
3895    ) -> Task<Result<ProjectTransaction>> {
3896        let position = position.to_point_utf16(buffer.read(cx));
3897        self.request_lsp(
3898            buffer,
3899            PerformRename {
3900                position,
3901                new_name,
3902                push_to_history,
3903            },
3904            cx,
3905        )
3906    }
3907
3908    #[allow(clippy::type_complexity)]
3909    pub fn search(
3910        &self,
3911        query: SearchQuery,
3912        cx: &mut ModelContext<Self>,
3913    ) -> Task<Result<HashMap<ModelHandle<Buffer>, Vec<Range<Anchor>>>>> {
3914        if self.is_local() {
3915            let snapshots = self
3916                .visible_worktrees(cx)
3917                .filter_map(|tree| {
3918                    let tree = tree.read(cx).as_local()?;
3919                    Some(tree.snapshot())
3920                })
3921                .collect::<Vec<_>>();
3922
3923            let background = cx.background().clone();
3924            let path_count: usize = snapshots.iter().map(|s| s.visible_file_count()).sum();
3925            if path_count == 0 {
3926                return Task::ready(Ok(Default::default()));
3927            }
3928            let workers = background.num_cpus().min(path_count);
3929            let (matching_paths_tx, mut matching_paths_rx) = smol::channel::bounded(1024);
3930            cx.background()
3931                .spawn({
3932                    let fs = self.fs.clone();
3933                    let background = cx.background().clone();
3934                    let query = query.clone();
3935                    async move {
3936                        let fs = &fs;
3937                        let query = &query;
3938                        let matching_paths_tx = &matching_paths_tx;
3939                        let paths_per_worker = (path_count + workers - 1) / workers;
3940                        let snapshots = &snapshots;
3941                        background
3942                            .scoped(|scope| {
3943                                for worker_ix in 0..workers {
3944                                    let worker_start_ix = worker_ix * paths_per_worker;
3945                                    let worker_end_ix = worker_start_ix + paths_per_worker;
3946                                    scope.spawn(async move {
3947                                        let mut snapshot_start_ix = 0;
3948                                        let mut abs_path = PathBuf::new();
3949                                        for snapshot in snapshots {
3950                                            let snapshot_end_ix =
3951                                                snapshot_start_ix + snapshot.visible_file_count();
3952                                            if worker_end_ix <= snapshot_start_ix {
3953                                                break;
3954                                            } else if worker_start_ix > snapshot_end_ix {
3955                                                snapshot_start_ix = snapshot_end_ix;
3956                                                continue;
3957                                            } else {
3958                                                let start_in_snapshot = worker_start_ix
3959                                                    .saturating_sub(snapshot_start_ix);
3960                                                let end_in_snapshot =
3961                                                    cmp::min(worker_end_ix, snapshot_end_ix)
3962                                                        - snapshot_start_ix;
3963
3964                                                for entry in snapshot
3965                                                    .files(false, start_in_snapshot)
3966                                                    .take(end_in_snapshot - start_in_snapshot)
3967                                                {
3968                                                    if matching_paths_tx.is_closed() {
3969                                                        break;
3970                                                    }
3971
3972                                                    abs_path.clear();
3973                                                    abs_path.push(&snapshot.abs_path());
3974                                                    abs_path.push(&entry.path);
3975                                                    let matches = if let Some(file) =
3976                                                        fs.open_sync(&abs_path).await.log_err()
3977                                                    {
3978                                                        query.detect(file).unwrap_or(false)
3979                                                    } else {
3980                                                        false
3981                                                    };
3982
3983                                                    if matches {
3984                                                        let project_path =
3985                                                            (snapshot.id(), entry.path.clone());
3986                                                        if matching_paths_tx
3987                                                            .send(project_path)
3988                                                            .await
3989                                                            .is_err()
3990                                                        {
3991                                                            break;
3992                                                        }
3993                                                    }
3994                                                }
3995
3996                                                snapshot_start_ix = snapshot_end_ix;
3997                                            }
3998                                        }
3999                                    });
4000                                }
4001                            })
4002                            .await;
4003                    }
4004                })
4005                .detach();
4006
4007            let (buffers_tx, buffers_rx) = smol::channel::bounded(1024);
4008            let open_buffers = self
4009                .opened_buffers
4010                .values()
4011                .filter_map(|b| b.upgrade(cx))
4012                .collect::<HashSet<_>>();
4013            cx.spawn(|this, cx| async move {
4014                for buffer in &open_buffers {
4015                    let snapshot = buffer.read_with(&cx, |buffer, _| buffer.snapshot());
4016                    buffers_tx.send((buffer.clone(), snapshot)).await?;
4017                }
4018
4019                let open_buffers = Rc::new(RefCell::new(open_buffers));
4020                while let Some(project_path) = matching_paths_rx.next().await {
4021                    if buffers_tx.is_closed() {
4022                        break;
4023                    }
4024
4025                    let this = this.clone();
4026                    let open_buffers = open_buffers.clone();
4027                    let buffers_tx = buffers_tx.clone();
4028                    cx.spawn(|mut cx| async move {
4029                        if let Some(buffer) = this
4030                            .update(&mut cx, |this, cx| this.open_buffer(project_path, cx))
4031                            .await
4032                            .log_err()
4033                        {
4034                            if open_buffers.borrow_mut().insert(buffer.clone()) {
4035                                let snapshot = buffer.read_with(&cx, |buffer, _| buffer.snapshot());
4036                                buffers_tx.send((buffer, snapshot)).await?;
4037                            }
4038                        }
4039
4040                        Ok::<_, anyhow::Error>(())
4041                    })
4042                    .detach();
4043                }
4044
4045                Ok::<_, anyhow::Error>(())
4046            })
4047            .detach_and_log_err(cx);
4048
4049            let background = cx.background().clone();
4050            cx.background().spawn(async move {
4051                let query = &query;
4052                let mut matched_buffers = Vec::new();
4053                for _ in 0..workers {
4054                    matched_buffers.push(HashMap::default());
4055                }
4056                background
4057                    .scoped(|scope| {
4058                        for worker_matched_buffers in matched_buffers.iter_mut() {
4059                            let mut buffers_rx = buffers_rx.clone();
4060                            scope.spawn(async move {
4061                                while let Some((buffer, snapshot)) = buffers_rx.next().await {
4062                                    let buffer_matches = query
4063                                        .search(snapshot.as_rope())
4064                                        .await
4065                                        .iter()
4066                                        .map(|range| {
4067                                            snapshot.anchor_before(range.start)
4068                                                ..snapshot.anchor_after(range.end)
4069                                        })
4070                                        .collect::<Vec<_>>();
4071                                    if !buffer_matches.is_empty() {
4072                                        worker_matched_buffers
4073                                            .insert(buffer.clone(), buffer_matches);
4074                                    }
4075                                }
4076                            });
4077                        }
4078                    })
4079                    .await;
4080                Ok(matched_buffers.into_iter().flatten().collect())
4081            })
4082        } else if let Some(project_id) = self.remote_id() {
4083            let request = self.client.request(query.to_proto(project_id));
4084            cx.spawn(|this, mut cx| async move {
4085                let response = request.await?;
4086                let mut result = HashMap::default();
4087                for location in response.locations {
4088                    let target_buffer = this
4089                        .update(&mut cx, |this, cx| {
4090                            this.wait_for_buffer(location.buffer_id, cx)
4091                        })
4092                        .await?;
4093                    let start = location
4094                        .start
4095                        .and_then(deserialize_anchor)
4096                        .ok_or_else(|| anyhow!("missing target start"))?;
4097                    let end = location
4098                        .end
4099                        .and_then(deserialize_anchor)
4100                        .ok_or_else(|| anyhow!("missing target end"))?;
4101                    result
4102                        .entry(target_buffer)
4103                        .or_insert(Vec::new())
4104                        .push(start..end)
4105                }
4106                Ok(result)
4107            })
4108        } else {
4109            Task::ready(Ok(Default::default()))
4110        }
4111    }
4112
4113    fn request_lsp<R: LspCommand>(
4114        &self,
4115        buffer_handle: ModelHandle<Buffer>,
4116        request: R,
4117        cx: &mut ModelContext<Self>,
4118    ) -> Task<Result<R::Response>>
4119    where
4120        <R::LspRequest as lsp::request::Request>::Result: Send,
4121    {
4122        let buffer = buffer_handle.read(cx);
4123        if self.is_local() {
4124            let file = File::from_dyn(buffer.file()).and_then(File::as_local);
4125            if let Some((file, language_server)) = file.zip(
4126                self.language_server_for_buffer(buffer, cx)
4127                    .map(|(_, server)| server.clone()),
4128            ) {
4129                let lsp_params = request.to_lsp(&file.abs_path(cx), cx);
4130                return cx.spawn(|this, cx| async move {
4131                    if !request.check_capabilities(language_server.capabilities()) {
4132                        return Ok(Default::default());
4133                    }
4134
4135                    let response = language_server
4136                        .request::<R::LspRequest>(lsp_params)
4137                        .await
4138                        .context("lsp request failed")?;
4139                    request
4140                        .response_from_lsp(response, this, buffer_handle, cx)
4141                        .await
4142                });
4143            }
4144        } else if let Some(project_id) = self.remote_id() {
4145            let rpc = self.client.clone();
4146            let message = request.to_proto(project_id, buffer);
4147            return cx.spawn(|this, cx| async move {
4148                let response = rpc.request(message).await?;
4149                request
4150                    .response_from_proto(response, this, buffer_handle, cx)
4151                    .await
4152            });
4153        }
4154        Task::ready(Ok(Default::default()))
4155    }
4156
4157    pub fn find_or_create_local_worktree(
4158        &mut self,
4159        abs_path: impl AsRef<Path>,
4160        visible: bool,
4161        cx: &mut ModelContext<Self>,
4162    ) -> Task<Result<(ModelHandle<Worktree>, PathBuf)>> {
4163        let abs_path = abs_path.as_ref();
4164        if let Some((tree, relative_path)) = self.find_local_worktree(abs_path, cx) {
4165            Task::ready(Ok((tree, relative_path)))
4166        } else {
4167            let worktree = self.create_local_worktree(abs_path, visible, cx);
4168            cx.foreground()
4169                .spawn(async move { Ok((worktree.await?, PathBuf::new())) })
4170        }
4171    }
4172
4173    pub fn find_local_worktree(
4174        &self,
4175        abs_path: &Path,
4176        cx: &AppContext,
4177    ) -> Option<(ModelHandle<Worktree>, PathBuf)> {
4178        for tree in &self.worktrees {
4179            if let Some(tree) = tree.upgrade(cx) {
4180                if let Some(relative_path) = tree
4181                    .read(cx)
4182                    .as_local()
4183                    .and_then(|t| abs_path.strip_prefix(t.abs_path()).ok())
4184                {
4185                    return Some((tree.clone(), relative_path.into()));
4186                }
4187            }
4188        }
4189        None
4190    }
4191
4192    pub fn is_shared(&self) -> bool {
4193        match &self.client_state {
4194            Some(ProjectClientState::Local { .. }) => true,
4195            _ => false,
4196        }
4197    }
4198
4199    fn create_local_worktree(
4200        &mut self,
4201        abs_path: impl AsRef<Path>,
4202        visible: bool,
4203        cx: &mut ModelContext<Self>,
4204    ) -> Task<Result<ModelHandle<Worktree>>> {
4205        let fs = self.fs.clone();
4206        let client = self.client.clone();
4207        let next_entry_id = self.next_entry_id.clone();
4208        let path: Arc<Path> = abs_path.as_ref().into();
4209        let task = self
4210            .loading_local_worktrees
4211            .entry(path.clone())
4212            .or_insert_with(|| {
4213                cx.spawn(|project, mut cx| {
4214                    async move {
4215                        let worktree = Worktree::local(
4216                            client.clone(),
4217                            path.clone(),
4218                            visible,
4219                            fs,
4220                            next_entry_id,
4221                            &mut cx,
4222                        )
4223                        .await;
4224                        project.update(&mut cx, |project, _| {
4225                            project.loading_local_worktrees.remove(&path);
4226                        });
4227                        let worktree = worktree?;
4228
4229                        let project_id = project.update(&mut cx, |project, cx| {
4230                            project.add_worktree(&worktree, cx);
4231                            project.remote_id()
4232                        });
4233
4234                        if let Some(project_id) = project_id {
4235                            worktree
4236                                .update(&mut cx, |worktree, cx| {
4237                                    worktree.as_local_mut().unwrap().share(project_id, cx)
4238                                })
4239                                .await
4240                                .log_err();
4241                        }
4242
4243                        Ok(worktree)
4244                    }
4245                    .map_err(Arc::new)
4246                })
4247                .shared()
4248            })
4249            .clone();
4250        cx.foreground().spawn(async move {
4251            match task.await {
4252                Ok(worktree) => Ok(worktree),
4253                Err(err) => Err(anyhow!("{}", err)),
4254            }
4255        })
4256    }
4257
4258    pub fn remove_worktree(&mut self, id_to_remove: WorktreeId, cx: &mut ModelContext<Self>) {
4259        self.worktrees.retain(|worktree| {
4260            if let Some(worktree) = worktree.upgrade(cx) {
4261                let id = worktree.read(cx).id();
4262                if id == id_to_remove {
4263                    cx.emit(Event::WorktreeRemoved(id));
4264                    false
4265                } else {
4266                    true
4267                }
4268            } else {
4269                false
4270            }
4271        });
4272        self.metadata_changed(cx);
4273        cx.notify();
4274    }
4275
4276    fn add_worktree(&mut self, worktree: &ModelHandle<Worktree>, cx: &mut ModelContext<Self>) {
4277        cx.observe(worktree, |_, _, cx| cx.notify()).detach();
4278        if worktree.read(cx).is_local() {
4279            cx.subscribe(worktree, |this, worktree, event, cx| match event {
4280                worktree::Event::UpdatedEntries => this.update_local_worktree_buffers(worktree, cx),
4281                worktree::Event::UpdatedGitRepositories(updated_repos) => {
4282                    this.update_local_worktree_buffers_git_repos(worktree, updated_repos, cx)
4283                }
4284            })
4285            .detach();
4286        }
4287
4288        let push_strong_handle = {
4289            let worktree = worktree.read(cx);
4290            self.is_shared() || worktree.is_visible() || worktree.is_remote()
4291        };
4292        if push_strong_handle {
4293            self.worktrees
4294                .push(WorktreeHandle::Strong(worktree.clone()));
4295        } else {
4296            self.worktrees
4297                .push(WorktreeHandle::Weak(worktree.downgrade()));
4298        }
4299
4300        self.metadata_changed(cx);
4301        cx.observe_release(worktree, |this, worktree, cx| {
4302            this.remove_worktree(worktree.id(), cx);
4303            cx.notify();
4304        })
4305        .detach();
4306
4307        cx.emit(Event::WorktreeAdded);
4308        cx.notify();
4309    }
4310
4311    fn update_local_worktree_buffers(
4312        &mut self,
4313        worktree_handle: ModelHandle<Worktree>,
4314        cx: &mut ModelContext<Self>,
4315    ) {
4316        let snapshot = worktree_handle.read(cx).snapshot();
4317        let mut buffers_to_delete = Vec::new();
4318        let mut renamed_buffers = Vec::new();
4319        for (buffer_id, buffer) in &self.opened_buffers {
4320            if let Some(buffer) = buffer.upgrade(cx) {
4321                buffer.update(cx, |buffer, cx| {
4322                    if let Some(old_file) = File::from_dyn(buffer.file()) {
4323                        if old_file.worktree != worktree_handle {
4324                            return;
4325                        }
4326
4327                        let new_file = if let Some(entry) = snapshot.entry_for_id(old_file.entry_id)
4328                        {
4329                            File {
4330                                is_local: true,
4331                                entry_id: entry.id,
4332                                mtime: entry.mtime,
4333                                path: entry.path.clone(),
4334                                worktree: worktree_handle.clone(),
4335                                is_deleted: false,
4336                            }
4337                        } else if let Some(entry) =
4338                            snapshot.entry_for_path(old_file.path().as_ref())
4339                        {
4340                            File {
4341                                is_local: true,
4342                                entry_id: entry.id,
4343                                mtime: entry.mtime,
4344                                path: entry.path.clone(),
4345                                worktree: worktree_handle.clone(),
4346                                is_deleted: false,
4347                            }
4348                        } else {
4349                            File {
4350                                is_local: true,
4351                                entry_id: old_file.entry_id,
4352                                path: old_file.path().clone(),
4353                                mtime: old_file.mtime(),
4354                                worktree: worktree_handle.clone(),
4355                                is_deleted: true,
4356                            }
4357                        };
4358
4359                        let old_path = old_file.abs_path(cx);
4360                        if new_file.abs_path(cx) != old_path {
4361                            renamed_buffers.push((cx.handle(), old_path));
4362                        }
4363
4364                        if let Some(project_id) = self.remote_id() {
4365                            self.client
4366                                .send(proto::UpdateBufferFile {
4367                                    project_id,
4368                                    buffer_id: *buffer_id as u64,
4369                                    file: Some(new_file.to_proto()),
4370                                })
4371                                .log_err();
4372                        }
4373                        buffer.file_updated(Arc::new(new_file), cx).detach();
4374                    }
4375                });
4376            } else {
4377                buffers_to_delete.push(*buffer_id);
4378            }
4379        }
4380
4381        for buffer_id in buffers_to_delete {
4382            self.opened_buffers.remove(&buffer_id);
4383        }
4384
4385        for (buffer, old_path) in renamed_buffers {
4386            self.unregister_buffer_from_language_server(&buffer, old_path, cx);
4387            self.assign_language_to_buffer(&buffer, cx);
4388            self.register_buffer_with_language_server(&buffer, cx);
4389        }
4390    }
4391
4392    fn update_local_worktree_buffers_git_repos(
4393        &mut self,
4394        worktree: ModelHandle<Worktree>,
4395        repos: &[GitRepositoryEntry],
4396        cx: &mut ModelContext<Self>,
4397    ) {
4398        for (_, buffer) in &self.opened_buffers {
4399            if let Some(buffer) = buffer.upgrade(cx) {
4400                let file = match File::from_dyn(buffer.read(cx).file()) {
4401                    Some(file) => file,
4402                    None => continue,
4403                };
4404                if file.worktree != worktree {
4405                    continue;
4406                }
4407
4408                let path = file.path().clone();
4409
4410                let repo = match repos.iter().find(|repo| repo.manages(&path)) {
4411                    Some(repo) => repo.clone(),
4412                    None => return,
4413                };
4414
4415                let relative_repo = match path.strip_prefix(repo.content_path) {
4416                    Ok(relative_repo) => relative_repo.to_owned(),
4417                    Err(_) => return,
4418                };
4419
4420                let remote_id = self.remote_id();
4421                let client = self.client.clone();
4422
4423                cx.spawn(|_, mut cx| async move {
4424                    let diff_base = cx
4425                        .background()
4426                        .spawn(async move { repo.repo.lock().load_index_text(&relative_repo) })
4427                        .await;
4428
4429                    let buffer_id = buffer.update(&mut cx, |buffer, cx| {
4430                        buffer.set_diff_base(diff_base.clone(), cx);
4431                        buffer.remote_id()
4432                    });
4433
4434                    if let Some(project_id) = remote_id {
4435                        client
4436                            .send(proto::UpdateDiffBase {
4437                                project_id,
4438                                buffer_id: buffer_id as u64,
4439                                diff_base,
4440                            })
4441                            .log_err();
4442                    }
4443                })
4444                .detach();
4445            }
4446        }
4447    }
4448
4449    pub fn set_active_path(&mut self, entry: Option<ProjectPath>, cx: &mut ModelContext<Self>) {
4450        let new_active_entry = entry.and_then(|project_path| {
4451            let worktree = self.worktree_for_id(project_path.worktree_id, cx)?;
4452            let entry = worktree.read(cx).entry_for_path(project_path.path)?;
4453            Some(entry.id)
4454        });
4455        if new_active_entry != self.active_entry {
4456            self.active_entry = new_active_entry;
4457            cx.emit(Event::ActiveEntryChanged(new_active_entry));
4458        }
4459    }
4460
4461    pub fn language_servers_running_disk_based_diagnostics(
4462        &self,
4463    ) -> impl Iterator<Item = usize> + '_ {
4464        self.language_server_statuses
4465            .iter()
4466            .filter_map(|(id, status)| {
4467                if status.has_pending_diagnostic_updates {
4468                    Some(*id)
4469                } else {
4470                    None
4471                }
4472            })
4473    }
4474
4475    pub fn diagnostic_summary(&self, cx: &AppContext) -> DiagnosticSummary {
4476        let mut summary = DiagnosticSummary::default();
4477        for (_, path_summary) in self.diagnostic_summaries(cx) {
4478            summary.error_count += path_summary.error_count;
4479            summary.warning_count += path_summary.warning_count;
4480        }
4481        summary
4482    }
4483
4484    pub fn diagnostic_summaries<'a>(
4485        &'a self,
4486        cx: &'a AppContext,
4487    ) -> impl Iterator<Item = (ProjectPath, DiagnosticSummary)> + 'a {
4488        self.visible_worktrees(cx).flat_map(move |worktree| {
4489            let worktree = worktree.read(cx);
4490            let worktree_id = worktree.id();
4491            worktree
4492                .diagnostic_summaries()
4493                .map(move |(path, summary)| (ProjectPath { worktree_id, path }, summary))
4494        })
4495    }
4496
4497    pub fn disk_based_diagnostics_started(
4498        &mut self,
4499        language_server_id: usize,
4500        cx: &mut ModelContext<Self>,
4501    ) {
4502        cx.emit(Event::DiskBasedDiagnosticsStarted { language_server_id });
4503    }
4504
4505    pub fn disk_based_diagnostics_finished(
4506        &mut self,
4507        language_server_id: usize,
4508        cx: &mut ModelContext<Self>,
4509    ) {
4510        cx.emit(Event::DiskBasedDiagnosticsFinished { language_server_id });
4511    }
4512
4513    pub fn active_entry(&self) -> Option<ProjectEntryId> {
4514        self.active_entry
4515    }
4516
4517    pub fn entry_for_path(&self, path: &ProjectPath, cx: &AppContext) -> Option<Entry> {
4518        self.worktree_for_id(path.worktree_id, cx)?
4519            .read(cx)
4520            .entry_for_path(&path.path)
4521            .cloned()
4522    }
4523
4524    pub fn path_for_entry(&self, entry_id: ProjectEntryId, cx: &AppContext) -> Option<ProjectPath> {
4525        let worktree = self.worktree_for_entry(entry_id, cx)?;
4526        let worktree = worktree.read(cx);
4527        let worktree_id = worktree.id();
4528        let path = worktree.entry_for_id(entry_id)?.path.clone();
4529        Some(ProjectPath { worktree_id, path })
4530    }
4531
4532    // RPC message handlers
4533
4534    async fn handle_unshare_project(
4535        this: ModelHandle<Self>,
4536        _: TypedEnvelope<proto::UnshareProject>,
4537        _: Arc<Client>,
4538        mut cx: AsyncAppContext,
4539    ) -> Result<()> {
4540        this.update(&mut cx, |this, cx| {
4541            if this.is_local() {
4542                this.unshare(cx)?;
4543            } else {
4544                this.disconnected_from_host(cx);
4545            }
4546            Ok(())
4547        })
4548    }
4549
4550    async fn handle_add_collaborator(
4551        this: ModelHandle<Self>,
4552        mut envelope: TypedEnvelope<proto::AddProjectCollaborator>,
4553        _: Arc<Client>,
4554        mut cx: AsyncAppContext,
4555    ) -> Result<()> {
4556        let collaborator = envelope
4557            .payload
4558            .collaborator
4559            .take()
4560            .ok_or_else(|| anyhow!("empty collaborator"))?;
4561
4562        let collaborator = Collaborator::from_proto(collaborator);
4563        this.update(&mut cx, |this, cx| {
4564            this.collaborators
4565                .insert(collaborator.peer_id, collaborator);
4566            cx.notify();
4567        });
4568
4569        Ok(())
4570    }
4571
4572    async fn handle_remove_collaborator(
4573        this: ModelHandle<Self>,
4574        envelope: TypedEnvelope<proto::RemoveProjectCollaborator>,
4575        _: Arc<Client>,
4576        mut cx: AsyncAppContext,
4577    ) -> Result<()> {
4578        this.update(&mut cx, |this, cx| {
4579            let peer_id = PeerId(envelope.payload.peer_id);
4580            let replica_id = this
4581                .collaborators
4582                .remove(&peer_id)
4583                .ok_or_else(|| anyhow!("unknown peer {:?}", peer_id))?
4584                .replica_id;
4585            for buffer in this.opened_buffers.values() {
4586                if let Some(buffer) = buffer.upgrade(cx) {
4587                    buffer.update(cx, |buffer, cx| buffer.remove_peer(replica_id, cx));
4588                }
4589            }
4590            this.shared_buffers.remove(&peer_id);
4591
4592            cx.emit(Event::CollaboratorLeft(peer_id));
4593            cx.notify();
4594            Ok(())
4595        })
4596    }
4597
4598    async fn handle_update_project(
4599        this: ModelHandle<Self>,
4600        envelope: TypedEnvelope<proto::UpdateProject>,
4601        client: Arc<Client>,
4602        mut cx: AsyncAppContext,
4603    ) -> Result<()> {
4604        this.update(&mut cx, |this, cx| {
4605            let replica_id = this.replica_id();
4606            let remote_id = this.remote_id().ok_or_else(|| anyhow!("invalid project"))?;
4607
4608            let mut old_worktrees_by_id = this
4609                .worktrees
4610                .drain(..)
4611                .filter_map(|worktree| {
4612                    let worktree = worktree.upgrade(cx)?;
4613                    Some((worktree.read(cx).id(), worktree))
4614                })
4615                .collect::<HashMap<_, _>>();
4616
4617            for worktree in envelope.payload.worktrees {
4618                if let Some(old_worktree) =
4619                    old_worktrees_by_id.remove(&WorktreeId::from_proto(worktree.id))
4620                {
4621                    this.worktrees.push(WorktreeHandle::Strong(old_worktree));
4622                } else {
4623                    let worktree =
4624                        Worktree::remote(remote_id, replica_id, worktree, client.clone(), cx);
4625                    this.add_worktree(&worktree, cx);
4626                }
4627            }
4628
4629            this.metadata_changed(cx);
4630            for (id, _) in old_worktrees_by_id {
4631                cx.emit(Event::WorktreeRemoved(id));
4632            }
4633
4634            Ok(())
4635        })
4636    }
4637
4638    async fn handle_update_worktree(
4639        this: ModelHandle<Self>,
4640        envelope: TypedEnvelope<proto::UpdateWorktree>,
4641        _: Arc<Client>,
4642        mut cx: AsyncAppContext,
4643    ) -> Result<()> {
4644        this.update(&mut cx, |this, cx| {
4645            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
4646            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
4647                worktree.update(cx, |worktree, _| {
4648                    let worktree = worktree.as_remote_mut().unwrap();
4649                    worktree.update_from_remote(envelope.payload);
4650                });
4651            }
4652            Ok(())
4653        })
4654    }
4655
4656    async fn handle_create_project_entry(
4657        this: ModelHandle<Self>,
4658        envelope: TypedEnvelope<proto::CreateProjectEntry>,
4659        _: Arc<Client>,
4660        mut cx: AsyncAppContext,
4661    ) -> Result<proto::ProjectEntryResponse> {
4662        let worktree = this.update(&mut cx, |this, cx| {
4663            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
4664            this.worktree_for_id(worktree_id, cx)
4665                .ok_or_else(|| anyhow!("worktree not found"))
4666        })?;
4667        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
4668        let entry = worktree
4669            .update(&mut cx, |worktree, cx| {
4670                let worktree = worktree.as_local_mut().unwrap();
4671                let path = PathBuf::from(OsString::from_vec(envelope.payload.path));
4672                worktree.create_entry(path, envelope.payload.is_directory, cx)
4673            })
4674            .await?;
4675        Ok(proto::ProjectEntryResponse {
4676            entry: Some((&entry).into()),
4677            worktree_scan_id: worktree_scan_id as u64,
4678        })
4679    }
4680
4681    async fn handle_rename_project_entry(
4682        this: ModelHandle<Self>,
4683        envelope: TypedEnvelope<proto::RenameProjectEntry>,
4684        _: Arc<Client>,
4685        mut cx: AsyncAppContext,
4686    ) -> Result<proto::ProjectEntryResponse> {
4687        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
4688        let worktree = this.read_with(&cx, |this, cx| {
4689            this.worktree_for_entry(entry_id, cx)
4690                .ok_or_else(|| anyhow!("worktree not found"))
4691        })?;
4692        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
4693        let entry = worktree
4694            .update(&mut cx, |worktree, cx| {
4695                let new_path = PathBuf::from(OsString::from_vec(envelope.payload.new_path));
4696                worktree
4697                    .as_local_mut()
4698                    .unwrap()
4699                    .rename_entry(entry_id, new_path, cx)
4700                    .ok_or_else(|| anyhow!("invalid entry"))
4701            })?
4702            .await?;
4703        Ok(proto::ProjectEntryResponse {
4704            entry: Some((&entry).into()),
4705            worktree_scan_id: worktree_scan_id as u64,
4706        })
4707    }
4708
4709    async fn handle_copy_project_entry(
4710        this: ModelHandle<Self>,
4711        envelope: TypedEnvelope<proto::CopyProjectEntry>,
4712        _: Arc<Client>,
4713        mut cx: AsyncAppContext,
4714    ) -> Result<proto::ProjectEntryResponse> {
4715        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
4716        let worktree = this.read_with(&cx, |this, cx| {
4717            this.worktree_for_entry(entry_id, cx)
4718                .ok_or_else(|| anyhow!("worktree not found"))
4719        })?;
4720        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
4721        let entry = worktree
4722            .update(&mut cx, |worktree, cx| {
4723                let new_path = PathBuf::from(OsString::from_vec(envelope.payload.new_path));
4724                worktree
4725                    .as_local_mut()
4726                    .unwrap()
4727                    .copy_entry(entry_id, new_path, cx)
4728                    .ok_or_else(|| anyhow!("invalid entry"))
4729            })?
4730            .await?;
4731        Ok(proto::ProjectEntryResponse {
4732            entry: Some((&entry).into()),
4733            worktree_scan_id: worktree_scan_id as u64,
4734        })
4735    }
4736
4737    async fn handle_delete_project_entry(
4738        this: ModelHandle<Self>,
4739        envelope: TypedEnvelope<proto::DeleteProjectEntry>,
4740        _: Arc<Client>,
4741        mut cx: AsyncAppContext,
4742    ) -> Result<proto::ProjectEntryResponse> {
4743        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
4744        let worktree = this.read_with(&cx, |this, cx| {
4745            this.worktree_for_entry(entry_id, cx)
4746                .ok_or_else(|| anyhow!("worktree not found"))
4747        })?;
4748        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
4749        worktree
4750            .update(&mut cx, |worktree, cx| {
4751                worktree
4752                    .as_local_mut()
4753                    .unwrap()
4754                    .delete_entry(entry_id, cx)
4755                    .ok_or_else(|| anyhow!("invalid entry"))
4756            })?
4757            .await?;
4758        Ok(proto::ProjectEntryResponse {
4759            entry: None,
4760            worktree_scan_id: worktree_scan_id as u64,
4761        })
4762    }
4763
4764    async fn handle_update_diagnostic_summary(
4765        this: ModelHandle<Self>,
4766        envelope: TypedEnvelope<proto::UpdateDiagnosticSummary>,
4767        _: Arc<Client>,
4768        mut cx: AsyncAppContext,
4769    ) -> Result<()> {
4770        this.update(&mut cx, |this, cx| {
4771            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
4772            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
4773                if let Some(summary) = envelope.payload.summary {
4774                    let project_path = ProjectPath {
4775                        worktree_id,
4776                        path: Path::new(&summary.path).into(),
4777                    };
4778                    worktree.update(cx, |worktree, _| {
4779                        worktree
4780                            .as_remote_mut()
4781                            .unwrap()
4782                            .update_diagnostic_summary(project_path.path.clone(), &summary);
4783                    });
4784                    cx.emit(Event::DiagnosticsUpdated {
4785                        language_server_id: summary.language_server_id as usize,
4786                        path: project_path,
4787                    });
4788                }
4789            }
4790            Ok(())
4791        })
4792    }
4793
4794    async fn handle_start_language_server(
4795        this: ModelHandle<Self>,
4796        envelope: TypedEnvelope<proto::StartLanguageServer>,
4797        _: Arc<Client>,
4798        mut cx: AsyncAppContext,
4799    ) -> Result<()> {
4800        let server = envelope
4801            .payload
4802            .server
4803            .ok_or_else(|| anyhow!("invalid server"))?;
4804        this.update(&mut cx, |this, cx| {
4805            this.language_server_statuses.insert(
4806                server.id as usize,
4807                LanguageServerStatus {
4808                    name: server.name,
4809                    pending_work: Default::default(),
4810                    has_pending_diagnostic_updates: false,
4811                    progress_tokens: Default::default(),
4812                },
4813            );
4814            cx.notify();
4815        });
4816        Ok(())
4817    }
4818
4819    async fn handle_update_language_server(
4820        this: ModelHandle<Self>,
4821        envelope: TypedEnvelope<proto::UpdateLanguageServer>,
4822        _: Arc<Client>,
4823        mut cx: AsyncAppContext,
4824    ) -> Result<()> {
4825        let language_server_id = envelope.payload.language_server_id as usize;
4826        match envelope
4827            .payload
4828            .variant
4829            .ok_or_else(|| anyhow!("invalid variant"))?
4830        {
4831            proto::update_language_server::Variant::WorkStart(payload) => {
4832                this.update(&mut cx, |this, cx| {
4833                    this.on_lsp_work_start(
4834                        language_server_id,
4835                        payload.token,
4836                        LanguageServerProgress {
4837                            message: payload.message,
4838                            percentage: payload.percentage.map(|p| p as usize),
4839                            last_update_at: Instant::now(),
4840                        },
4841                        cx,
4842                    );
4843                })
4844            }
4845            proto::update_language_server::Variant::WorkProgress(payload) => {
4846                this.update(&mut cx, |this, cx| {
4847                    this.on_lsp_work_progress(
4848                        language_server_id,
4849                        payload.token,
4850                        LanguageServerProgress {
4851                            message: payload.message,
4852                            percentage: payload.percentage.map(|p| p as usize),
4853                            last_update_at: Instant::now(),
4854                        },
4855                        cx,
4856                    );
4857                })
4858            }
4859            proto::update_language_server::Variant::WorkEnd(payload) => {
4860                this.update(&mut cx, |this, cx| {
4861                    this.on_lsp_work_end(language_server_id, payload.token, cx);
4862                })
4863            }
4864            proto::update_language_server::Variant::DiskBasedDiagnosticsUpdating(_) => {
4865                this.update(&mut cx, |this, cx| {
4866                    this.disk_based_diagnostics_started(language_server_id, cx);
4867                })
4868            }
4869            proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(_) => {
4870                this.update(&mut cx, |this, cx| {
4871                    this.disk_based_diagnostics_finished(language_server_id, cx)
4872                });
4873            }
4874        }
4875
4876        Ok(())
4877    }
4878
4879    async fn handle_update_buffer(
4880        this: ModelHandle<Self>,
4881        envelope: TypedEnvelope<proto::UpdateBuffer>,
4882        _: Arc<Client>,
4883        mut cx: AsyncAppContext,
4884    ) -> Result<()> {
4885        this.update(&mut cx, |this, cx| {
4886            let payload = envelope.payload.clone();
4887            let buffer_id = payload.buffer_id;
4888            let ops = payload
4889                .operations
4890                .into_iter()
4891                .map(language::proto::deserialize_operation)
4892                .collect::<Result<Vec<_>, _>>()?;
4893            let is_remote = this.is_remote();
4894            match this.opened_buffers.entry(buffer_id) {
4895                hash_map::Entry::Occupied(mut e) => match e.get_mut() {
4896                    OpenBuffer::Strong(buffer) => {
4897                        buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx))?;
4898                    }
4899                    OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
4900                    OpenBuffer::Weak(_) => {}
4901                },
4902                hash_map::Entry::Vacant(e) => {
4903                    assert!(
4904                        is_remote,
4905                        "received buffer update from {:?}",
4906                        envelope.original_sender_id
4907                    );
4908                    e.insert(OpenBuffer::Operations(ops));
4909                }
4910            }
4911            Ok(())
4912        })
4913    }
4914
4915    async fn handle_create_buffer_for_peer(
4916        this: ModelHandle<Self>,
4917        envelope: TypedEnvelope<proto::CreateBufferForPeer>,
4918        _: Arc<Client>,
4919        mut cx: AsyncAppContext,
4920    ) -> Result<()> {
4921        this.update(&mut cx, |this, cx| {
4922            match envelope
4923                .payload
4924                .variant
4925                .ok_or_else(|| anyhow!("missing variant"))?
4926            {
4927                proto::create_buffer_for_peer::Variant::State(mut state) => {
4928                    let mut buffer_file = None;
4929                    if let Some(file) = state.file.take() {
4930                        let worktree_id = WorktreeId::from_proto(file.worktree_id);
4931                        let worktree = this.worktree_for_id(worktree_id, cx).ok_or_else(|| {
4932                            anyhow!("no worktree found for id {}", file.worktree_id)
4933                        })?;
4934                        buffer_file = Some(Arc::new(File::from_proto(file, worktree.clone(), cx)?)
4935                            as Arc<dyn language::File>);
4936                    }
4937
4938                    let buffer_id = state.id;
4939                    let buffer = cx.add_model(|_| {
4940                        Buffer::from_proto(this.replica_id(), state, buffer_file).unwrap()
4941                    });
4942                    this.incomplete_buffers.insert(buffer_id, buffer);
4943                }
4944                proto::create_buffer_for_peer::Variant::Chunk(chunk) => {
4945                    let buffer = this
4946                        .incomplete_buffers
4947                        .get(&chunk.buffer_id)
4948                        .ok_or_else(|| {
4949                            anyhow!(
4950                                "received chunk for buffer {} without initial state",
4951                                chunk.buffer_id
4952                            )
4953                        })?
4954                        .clone();
4955                    let operations = chunk
4956                        .operations
4957                        .into_iter()
4958                        .map(language::proto::deserialize_operation)
4959                        .collect::<Result<Vec<_>>>()?;
4960                    buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx))?;
4961
4962                    if chunk.is_last {
4963                        this.incomplete_buffers.remove(&chunk.buffer_id);
4964                        this.register_buffer(&buffer, cx)?;
4965                    }
4966                }
4967            }
4968
4969            Ok(())
4970        })
4971    }
4972
4973    async fn handle_update_diff_base(
4974        this: ModelHandle<Self>,
4975        envelope: TypedEnvelope<proto::UpdateDiffBase>,
4976        _: Arc<Client>,
4977        mut cx: AsyncAppContext,
4978    ) -> Result<()> {
4979        this.update(&mut cx, |this, cx| {
4980            let buffer_id = envelope.payload.buffer_id;
4981            let diff_base = envelope.payload.diff_base;
4982            let buffer = this
4983                .opened_buffers
4984                .get_mut(&buffer_id)
4985                .and_then(|b| b.upgrade(cx))
4986                .ok_or_else(|| anyhow!("No such buffer {}", buffer_id))?;
4987
4988            buffer.update(cx, |buffer, cx| buffer.set_diff_base(diff_base, cx));
4989
4990            Ok(())
4991        })
4992    }
4993
4994    async fn handle_update_buffer_file(
4995        this: ModelHandle<Self>,
4996        envelope: TypedEnvelope<proto::UpdateBufferFile>,
4997        _: Arc<Client>,
4998        mut cx: AsyncAppContext,
4999    ) -> Result<()> {
5000        this.update(&mut cx, |this, cx| {
5001            let payload = envelope.payload.clone();
5002            let buffer_id = payload.buffer_id;
5003            let file = payload.file.ok_or_else(|| anyhow!("invalid file"))?;
5004            let worktree = this
5005                .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
5006                .ok_or_else(|| anyhow!("no such worktree"))?;
5007            let file = File::from_proto(file, worktree, cx)?;
5008            let buffer = this
5009                .opened_buffers
5010                .get_mut(&buffer_id)
5011                .and_then(|b| b.upgrade(cx))
5012                .ok_or_else(|| anyhow!("no such buffer"))?;
5013            buffer.update(cx, |buffer, cx| {
5014                buffer.file_updated(Arc::new(file), cx).detach();
5015            });
5016            this.assign_language_to_buffer(&buffer, cx);
5017            Ok(())
5018        })
5019    }
5020
5021    async fn handle_save_buffer(
5022        this: ModelHandle<Self>,
5023        envelope: TypedEnvelope<proto::SaveBuffer>,
5024        _: Arc<Client>,
5025        mut cx: AsyncAppContext,
5026    ) -> Result<proto::BufferSaved> {
5027        let buffer_id = envelope.payload.buffer_id;
5028        let requested_version = deserialize_version(envelope.payload.version);
5029
5030        let (project_id, buffer) = this.update(&mut cx, |this, cx| {
5031            let project_id = this.remote_id().ok_or_else(|| anyhow!("not connected"))?;
5032            let buffer = this
5033                .opened_buffers
5034                .get(&buffer_id)
5035                .and_then(|buffer| buffer.upgrade(cx))
5036                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?;
5037            Ok::<_, anyhow::Error>((project_id, buffer))
5038        })?;
5039        buffer
5040            .update(&mut cx, |buffer, _| {
5041                buffer.wait_for_version(requested_version)
5042            })
5043            .await;
5044
5045        let (saved_version, fingerprint, mtime) =
5046            buffer.update(&mut cx, |buffer, cx| buffer.save(cx)).await?;
5047        Ok(proto::BufferSaved {
5048            project_id,
5049            buffer_id,
5050            version: serialize_version(&saved_version),
5051            mtime: Some(mtime.into()),
5052            fingerprint,
5053        })
5054    }
5055
5056    async fn handle_reload_buffers(
5057        this: ModelHandle<Self>,
5058        envelope: TypedEnvelope<proto::ReloadBuffers>,
5059        _: Arc<Client>,
5060        mut cx: AsyncAppContext,
5061    ) -> Result<proto::ReloadBuffersResponse> {
5062        let sender_id = envelope.original_sender_id()?;
5063        let reload = this.update(&mut cx, |this, cx| {
5064            let mut buffers = HashSet::default();
5065            for buffer_id in &envelope.payload.buffer_ids {
5066                buffers.insert(
5067                    this.opened_buffers
5068                        .get(buffer_id)
5069                        .and_then(|buffer| buffer.upgrade(cx))
5070                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
5071                );
5072            }
5073            Ok::<_, anyhow::Error>(this.reload_buffers(buffers, false, cx))
5074        })?;
5075
5076        let project_transaction = reload.await?;
5077        let project_transaction = this.update(&mut cx, |this, cx| {
5078            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5079        });
5080        Ok(proto::ReloadBuffersResponse {
5081            transaction: Some(project_transaction),
5082        })
5083    }
5084
5085    async fn handle_format_buffers(
5086        this: ModelHandle<Self>,
5087        envelope: TypedEnvelope<proto::FormatBuffers>,
5088        _: Arc<Client>,
5089        mut cx: AsyncAppContext,
5090    ) -> Result<proto::FormatBuffersResponse> {
5091        let sender_id = envelope.original_sender_id()?;
5092        let format = this.update(&mut cx, |this, cx| {
5093            let mut buffers = HashSet::default();
5094            for buffer_id in &envelope.payload.buffer_ids {
5095                buffers.insert(
5096                    this.opened_buffers
5097                        .get(buffer_id)
5098                        .and_then(|buffer| buffer.upgrade(cx))
5099                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
5100                );
5101            }
5102            let trigger = FormatTrigger::from_proto(envelope.payload.trigger);
5103            Ok::<_, anyhow::Error>(this.format(buffers, false, trigger, cx))
5104        })?;
5105
5106        let project_transaction = format.await?;
5107        let project_transaction = this.update(&mut cx, |this, cx| {
5108            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5109        });
5110        Ok(proto::FormatBuffersResponse {
5111            transaction: Some(project_transaction),
5112        })
5113    }
5114
5115    async fn handle_get_completions(
5116        this: ModelHandle<Self>,
5117        envelope: TypedEnvelope<proto::GetCompletions>,
5118        _: Arc<Client>,
5119        mut cx: AsyncAppContext,
5120    ) -> Result<proto::GetCompletionsResponse> {
5121        let position = envelope
5122            .payload
5123            .position
5124            .and_then(language::proto::deserialize_anchor)
5125            .ok_or_else(|| anyhow!("invalid position"))?;
5126        let version = deserialize_version(envelope.payload.version);
5127        let buffer = this.read_with(&cx, |this, cx| {
5128            this.opened_buffers
5129                .get(&envelope.payload.buffer_id)
5130                .and_then(|buffer| buffer.upgrade(cx))
5131                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))
5132        })?;
5133        buffer
5134            .update(&mut cx, |buffer, _| buffer.wait_for_version(version))
5135            .await;
5136        let version = buffer.read_with(&cx, |buffer, _| buffer.version());
5137        let completions = this
5138            .update(&mut cx, |this, cx| this.completions(&buffer, position, cx))
5139            .await?;
5140
5141        Ok(proto::GetCompletionsResponse {
5142            completions: completions
5143                .iter()
5144                .map(language::proto::serialize_completion)
5145                .collect(),
5146            version: serialize_version(&version),
5147        })
5148    }
5149
5150    async fn handle_apply_additional_edits_for_completion(
5151        this: ModelHandle<Self>,
5152        envelope: TypedEnvelope<proto::ApplyCompletionAdditionalEdits>,
5153        _: Arc<Client>,
5154        mut cx: AsyncAppContext,
5155    ) -> Result<proto::ApplyCompletionAdditionalEditsResponse> {
5156        let (buffer, completion) = this.update(&mut cx, |this, cx| {
5157            let buffer = this
5158                .opened_buffers
5159                .get(&envelope.payload.buffer_id)
5160                .and_then(|buffer| buffer.upgrade(cx))
5161                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
5162            let language = buffer.read(cx).language();
5163            let completion = language::proto::deserialize_completion(
5164                envelope
5165                    .payload
5166                    .completion
5167                    .ok_or_else(|| anyhow!("invalid completion"))?,
5168                language.cloned(),
5169            );
5170            Ok::<_, anyhow::Error>((buffer, completion))
5171        })?;
5172
5173        let completion = completion.await?;
5174
5175        let apply_additional_edits = this.update(&mut cx, |this, cx| {
5176            this.apply_additional_edits_for_completion(buffer, completion, false, cx)
5177        });
5178
5179        Ok(proto::ApplyCompletionAdditionalEditsResponse {
5180            transaction: apply_additional_edits
5181                .await?
5182                .as_ref()
5183                .map(language::proto::serialize_transaction),
5184        })
5185    }
5186
5187    async fn handle_get_code_actions(
5188        this: ModelHandle<Self>,
5189        envelope: TypedEnvelope<proto::GetCodeActions>,
5190        _: Arc<Client>,
5191        mut cx: AsyncAppContext,
5192    ) -> Result<proto::GetCodeActionsResponse> {
5193        let start = envelope
5194            .payload
5195            .start
5196            .and_then(language::proto::deserialize_anchor)
5197            .ok_or_else(|| anyhow!("invalid start"))?;
5198        let end = envelope
5199            .payload
5200            .end
5201            .and_then(language::proto::deserialize_anchor)
5202            .ok_or_else(|| anyhow!("invalid end"))?;
5203        let buffer = this.update(&mut cx, |this, cx| {
5204            this.opened_buffers
5205                .get(&envelope.payload.buffer_id)
5206                .and_then(|buffer| buffer.upgrade(cx))
5207                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))
5208        })?;
5209        buffer
5210            .update(&mut cx, |buffer, _| {
5211                buffer.wait_for_version(deserialize_version(envelope.payload.version))
5212            })
5213            .await;
5214
5215        let version = buffer.read_with(&cx, |buffer, _| buffer.version());
5216        let code_actions = this.update(&mut cx, |this, cx| {
5217            Ok::<_, anyhow::Error>(this.code_actions(&buffer, start..end, cx))
5218        })?;
5219
5220        Ok(proto::GetCodeActionsResponse {
5221            actions: code_actions
5222                .await?
5223                .iter()
5224                .map(language::proto::serialize_code_action)
5225                .collect(),
5226            version: serialize_version(&version),
5227        })
5228    }
5229
5230    async fn handle_apply_code_action(
5231        this: ModelHandle<Self>,
5232        envelope: TypedEnvelope<proto::ApplyCodeAction>,
5233        _: Arc<Client>,
5234        mut cx: AsyncAppContext,
5235    ) -> Result<proto::ApplyCodeActionResponse> {
5236        let sender_id = envelope.original_sender_id()?;
5237        let action = language::proto::deserialize_code_action(
5238            envelope
5239                .payload
5240                .action
5241                .ok_or_else(|| anyhow!("invalid action"))?,
5242        )?;
5243        let apply_code_action = this.update(&mut cx, |this, cx| {
5244            let buffer = this
5245                .opened_buffers
5246                .get(&envelope.payload.buffer_id)
5247                .and_then(|buffer| buffer.upgrade(cx))
5248                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
5249            Ok::<_, anyhow::Error>(this.apply_code_action(buffer, action, false, cx))
5250        })?;
5251
5252        let project_transaction = apply_code_action.await?;
5253        let project_transaction = this.update(&mut cx, |this, cx| {
5254            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5255        });
5256        Ok(proto::ApplyCodeActionResponse {
5257            transaction: Some(project_transaction),
5258        })
5259    }
5260
5261    async fn handle_lsp_command<T: LspCommand>(
5262        this: ModelHandle<Self>,
5263        envelope: TypedEnvelope<T::ProtoRequest>,
5264        _: Arc<Client>,
5265        mut cx: AsyncAppContext,
5266    ) -> Result<<T::ProtoRequest as proto::RequestMessage>::Response>
5267    where
5268        <T::LspRequest as lsp::request::Request>::Result: Send,
5269    {
5270        let sender_id = envelope.original_sender_id()?;
5271        let buffer_id = T::buffer_id_from_proto(&envelope.payload);
5272        let buffer_handle = this.read_with(&cx, |this, _| {
5273            this.opened_buffers
5274                .get(&buffer_id)
5275                .and_then(|buffer| buffer.upgrade(&cx))
5276                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))
5277        })?;
5278        let request = T::from_proto(
5279            envelope.payload,
5280            this.clone(),
5281            buffer_handle.clone(),
5282            cx.clone(),
5283        )
5284        .await?;
5285        let buffer_version = buffer_handle.read_with(&cx, |buffer, _| buffer.version());
5286        let response = this
5287            .update(&mut cx, |this, cx| {
5288                this.request_lsp(buffer_handle, request, cx)
5289            })
5290            .await?;
5291        this.update(&mut cx, |this, cx| {
5292            Ok(T::response_to_proto(
5293                response,
5294                this,
5295                sender_id,
5296                &buffer_version,
5297                cx,
5298            ))
5299        })
5300    }
5301
5302    async fn handle_get_project_symbols(
5303        this: ModelHandle<Self>,
5304        envelope: TypedEnvelope<proto::GetProjectSymbols>,
5305        _: Arc<Client>,
5306        mut cx: AsyncAppContext,
5307    ) -> Result<proto::GetProjectSymbolsResponse> {
5308        let symbols = this
5309            .update(&mut cx, |this, cx| {
5310                this.symbols(&envelope.payload.query, cx)
5311            })
5312            .await?;
5313
5314        Ok(proto::GetProjectSymbolsResponse {
5315            symbols: symbols.iter().map(serialize_symbol).collect(),
5316        })
5317    }
5318
5319    async fn handle_search_project(
5320        this: ModelHandle<Self>,
5321        envelope: TypedEnvelope<proto::SearchProject>,
5322        _: Arc<Client>,
5323        mut cx: AsyncAppContext,
5324    ) -> Result<proto::SearchProjectResponse> {
5325        let peer_id = envelope.original_sender_id()?;
5326        let query = SearchQuery::from_proto(envelope.payload)?;
5327        let result = this
5328            .update(&mut cx, |this, cx| this.search(query, cx))
5329            .await?;
5330
5331        this.update(&mut cx, |this, cx| {
5332            let mut locations = Vec::new();
5333            for (buffer, ranges) in result {
5334                for range in ranges {
5335                    let start = serialize_anchor(&range.start);
5336                    let end = serialize_anchor(&range.end);
5337                    let buffer_id = this.create_buffer_for_peer(&buffer, peer_id, cx);
5338                    locations.push(proto::Location {
5339                        buffer_id,
5340                        start: Some(start),
5341                        end: Some(end),
5342                    });
5343                }
5344            }
5345            Ok(proto::SearchProjectResponse { locations })
5346        })
5347    }
5348
5349    async fn handle_open_buffer_for_symbol(
5350        this: ModelHandle<Self>,
5351        envelope: TypedEnvelope<proto::OpenBufferForSymbol>,
5352        _: Arc<Client>,
5353        mut cx: AsyncAppContext,
5354    ) -> Result<proto::OpenBufferForSymbolResponse> {
5355        let peer_id = envelope.original_sender_id()?;
5356        let symbol = envelope
5357            .payload
5358            .symbol
5359            .ok_or_else(|| anyhow!("invalid symbol"))?;
5360        let symbol = this
5361            .read_with(&cx, |this, _| this.deserialize_symbol(symbol))
5362            .await?;
5363        let symbol = this.read_with(&cx, |this, _| {
5364            let signature = this.symbol_signature(&symbol.path);
5365            if signature == symbol.signature {
5366                Ok(symbol)
5367            } else {
5368                Err(anyhow!("invalid symbol signature"))
5369            }
5370        })?;
5371        let buffer = this
5372            .update(&mut cx, |this, cx| this.open_buffer_for_symbol(&symbol, cx))
5373            .await?;
5374
5375        Ok(proto::OpenBufferForSymbolResponse {
5376            buffer_id: this.update(&mut cx, |this, cx| {
5377                this.create_buffer_for_peer(&buffer, peer_id, cx)
5378            }),
5379        })
5380    }
5381
5382    fn symbol_signature(&self, project_path: &ProjectPath) -> [u8; 32] {
5383        let mut hasher = Sha256::new();
5384        hasher.update(project_path.worktree_id.to_proto().to_be_bytes());
5385        hasher.update(project_path.path.to_string_lossy().as_bytes());
5386        hasher.update(self.nonce.to_be_bytes());
5387        hasher.finalize().as_slice().try_into().unwrap()
5388    }
5389
5390    async fn handle_open_buffer_by_id(
5391        this: ModelHandle<Self>,
5392        envelope: TypedEnvelope<proto::OpenBufferById>,
5393        _: Arc<Client>,
5394        mut cx: AsyncAppContext,
5395    ) -> Result<proto::OpenBufferResponse> {
5396        let peer_id = envelope.original_sender_id()?;
5397        let buffer = this
5398            .update(&mut cx, |this, cx| {
5399                this.open_buffer_by_id(envelope.payload.id, cx)
5400            })
5401            .await?;
5402        this.update(&mut cx, |this, cx| {
5403            Ok(proto::OpenBufferResponse {
5404                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
5405            })
5406        })
5407    }
5408
5409    async fn handle_open_buffer_by_path(
5410        this: ModelHandle<Self>,
5411        envelope: TypedEnvelope<proto::OpenBufferByPath>,
5412        _: Arc<Client>,
5413        mut cx: AsyncAppContext,
5414    ) -> Result<proto::OpenBufferResponse> {
5415        let peer_id = envelope.original_sender_id()?;
5416        let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
5417        let open_buffer = this.update(&mut cx, |this, cx| {
5418            this.open_buffer(
5419                ProjectPath {
5420                    worktree_id,
5421                    path: PathBuf::from(envelope.payload.path).into(),
5422                },
5423                cx,
5424            )
5425        });
5426
5427        let buffer = open_buffer.await?;
5428        this.update(&mut cx, |this, cx| {
5429            Ok(proto::OpenBufferResponse {
5430                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
5431            })
5432        })
5433    }
5434
5435    fn serialize_project_transaction_for_peer(
5436        &mut self,
5437        project_transaction: ProjectTransaction,
5438        peer_id: PeerId,
5439        cx: &AppContext,
5440    ) -> proto::ProjectTransaction {
5441        let mut serialized_transaction = proto::ProjectTransaction {
5442            buffer_ids: Default::default(),
5443            transactions: Default::default(),
5444        };
5445        for (buffer, transaction) in project_transaction.0 {
5446            serialized_transaction
5447                .buffer_ids
5448                .push(self.create_buffer_for_peer(&buffer, peer_id, cx));
5449            serialized_transaction
5450                .transactions
5451                .push(language::proto::serialize_transaction(&transaction));
5452        }
5453        serialized_transaction
5454    }
5455
5456    fn deserialize_project_transaction(
5457        &mut self,
5458        message: proto::ProjectTransaction,
5459        push_to_history: bool,
5460        cx: &mut ModelContext<Self>,
5461    ) -> Task<Result<ProjectTransaction>> {
5462        cx.spawn(|this, mut cx| async move {
5463            let mut project_transaction = ProjectTransaction::default();
5464            for (buffer_id, transaction) in message.buffer_ids.into_iter().zip(message.transactions)
5465            {
5466                let buffer = this
5467                    .update(&mut cx, |this, cx| this.wait_for_buffer(buffer_id, cx))
5468                    .await?;
5469                let transaction = language::proto::deserialize_transaction(transaction)?;
5470                project_transaction.0.insert(buffer, transaction);
5471            }
5472
5473            for (buffer, transaction) in &project_transaction.0 {
5474                buffer
5475                    .update(&mut cx, |buffer, _| {
5476                        buffer.wait_for_edits(transaction.edit_ids.iter().copied())
5477                    })
5478                    .await;
5479
5480                if push_to_history {
5481                    buffer.update(&mut cx, |buffer, _| {
5482                        buffer.push_transaction(transaction.clone(), Instant::now());
5483                    });
5484                }
5485            }
5486
5487            Ok(project_transaction)
5488        })
5489    }
5490
5491    fn create_buffer_for_peer(
5492        &mut self,
5493        buffer: &ModelHandle<Buffer>,
5494        peer_id: PeerId,
5495        cx: &AppContext,
5496    ) -> u64 {
5497        let buffer_id = buffer.read(cx).remote_id();
5498        if let Some(project_id) = self.remote_id() {
5499            let shared_buffers = self.shared_buffers.entry(peer_id).or_default();
5500            if shared_buffers.insert(buffer_id) {
5501                let buffer = buffer.read(cx);
5502                let state = buffer.to_proto();
5503                let operations = buffer.serialize_ops(cx);
5504                let client = self.client.clone();
5505                cx.background()
5506                    .spawn(
5507                        async move {
5508                            let mut operations = operations.await;
5509
5510                            client.send(proto::CreateBufferForPeer {
5511                                project_id,
5512                                peer_id: peer_id.0,
5513                                variant: Some(proto::create_buffer_for_peer::Variant::State(state)),
5514                            })?;
5515
5516                            loop {
5517                                #[cfg(any(test, feature = "test-support"))]
5518                                const CHUNK_SIZE: usize = 5;
5519
5520                                #[cfg(not(any(test, feature = "test-support")))]
5521                                const CHUNK_SIZE: usize = 100;
5522
5523                                let chunk = operations
5524                                    .drain(..cmp::min(CHUNK_SIZE, operations.len()))
5525                                    .collect();
5526                                let is_last = operations.is_empty();
5527                                client.send(proto::CreateBufferForPeer {
5528                                    project_id,
5529                                    peer_id: peer_id.0,
5530                                    variant: Some(proto::create_buffer_for_peer::Variant::Chunk(
5531                                        proto::BufferChunk {
5532                                            buffer_id,
5533                                            operations: chunk,
5534                                            is_last,
5535                                        },
5536                                    )),
5537                                })?;
5538
5539                                if is_last {
5540                                    break;
5541                                }
5542                            }
5543
5544                            Ok(())
5545                        }
5546                        .log_err(),
5547                    )
5548                    .detach();
5549            }
5550        }
5551
5552        buffer_id
5553    }
5554
5555    fn wait_for_buffer(
5556        &self,
5557        id: u64,
5558        cx: &mut ModelContext<Self>,
5559    ) -> Task<Result<ModelHandle<Buffer>>> {
5560        let mut opened_buffer_rx = self.opened_buffer.1.clone();
5561        cx.spawn(|this, mut cx| async move {
5562            let buffer = loop {
5563                let buffer = this.read_with(&cx, |this, cx| {
5564                    this.opened_buffers
5565                        .get(&id)
5566                        .and_then(|buffer| buffer.upgrade(cx))
5567                });
5568                if let Some(buffer) = buffer {
5569                    break buffer;
5570                } else if this.read_with(&cx, |this, _| this.is_read_only()) {
5571                    return Err(anyhow!("disconnected before buffer {} could be opened", id));
5572                }
5573
5574                opened_buffer_rx
5575                    .next()
5576                    .await
5577                    .ok_or_else(|| anyhow!("project dropped while waiting for buffer"))?;
5578            };
5579            buffer.update(&mut cx, |buffer, cx| buffer.git_diff_recalc(cx));
5580            Ok(buffer)
5581        })
5582    }
5583
5584    fn deserialize_symbol(
5585        &self,
5586        serialized_symbol: proto::Symbol,
5587    ) -> impl Future<Output = Result<Symbol>> {
5588        let languages = self.languages.clone();
5589        async move {
5590            let source_worktree_id = WorktreeId::from_proto(serialized_symbol.source_worktree_id);
5591            let worktree_id = WorktreeId::from_proto(serialized_symbol.worktree_id);
5592            let start = serialized_symbol
5593                .start
5594                .ok_or_else(|| anyhow!("invalid start"))?;
5595            let end = serialized_symbol
5596                .end
5597                .ok_or_else(|| anyhow!("invalid end"))?;
5598            let kind = unsafe { mem::transmute(serialized_symbol.kind) };
5599            let path = ProjectPath {
5600                worktree_id,
5601                path: PathBuf::from(serialized_symbol.path).into(),
5602            };
5603            let language = languages.select_language(&path.path);
5604            Ok(Symbol {
5605                language_server_name: LanguageServerName(
5606                    serialized_symbol.language_server_name.into(),
5607                ),
5608                source_worktree_id,
5609                path,
5610                label: {
5611                    match language {
5612                        Some(language) => {
5613                            language
5614                                .label_for_symbol(&serialized_symbol.name, kind)
5615                                .await
5616                        }
5617                        None => None,
5618                    }
5619                    .unwrap_or_else(|| CodeLabel::plain(serialized_symbol.name.clone(), None))
5620                },
5621
5622                name: serialized_symbol.name,
5623                range: PointUtf16::new(start.row, start.column)
5624                    ..PointUtf16::new(end.row, end.column),
5625                kind,
5626                signature: serialized_symbol
5627                    .signature
5628                    .try_into()
5629                    .map_err(|_| anyhow!("invalid signature"))?,
5630            })
5631        }
5632    }
5633
5634    async fn handle_buffer_saved(
5635        this: ModelHandle<Self>,
5636        envelope: TypedEnvelope<proto::BufferSaved>,
5637        _: Arc<Client>,
5638        mut cx: AsyncAppContext,
5639    ) -> Result<()> {
5640        let version = deserialize_version(envelope.payload.version);
5641        let mtime = envelope
5642            .payload
5643            .mtime
5644            .ok_or_else(|| anyhow!("missing mtime"))?
5645            .into();
5646
5647        this.update(&mut cx, |this, cx| {
5648            let buffer = this
5649                .opened_buffers
5650                .get(&envelope.payload.buffer_id)
5651                .and_then(|buffer| buffer.upgrade(cx));
5652            if let Some(buffer) = buffer {
5653                buffer.update(cx, |buffer, cx| {
5654                    buffer.did_save(version, envelope.payload.fingerprint, mtime, None, cx);
5655                });
5656            }
5657            Ok(())
5658        })
5659    }
5660
5661    async fn handle_buffer_reloaded(
5662        this: ModelHandle<Self>,
5663        envelope: TypedEnvelope<proto::BufferReloaded>,
5664        _: Arc<Client>,
5665        mut cx: AsyncAppContext,
5666    ) -> Result<()> {
5667        let payload = envelope.payload;
5668        let version = deserialize_version(payload.version);
5669        let line_ending = deserialize_line_ending(
5670            proto::LineEnding::from_i32(payload.line_ending)
5671                .ok_or_else(|| anyhow!("missing line ending"))?,
5672        );
5673        let mtime = payload
5674            .mtime
5675            .ok_or_else(|| anyhow!("missing mtime"))?
5676            .into();
5677        this.update(&mut cx, |this, cx| {
5678            let buffer = this
5679                .opened_buffers
5680                .get(&payload.buffer_id)
5681                .and_then(|buffer| buffer.upgrade(cx));
5682            if let Some(buffer) = buffer {
5683                buffer.update(cx, |buffer, cx| {
5684                    buffer.did_reload(version, payload.fingerprint, line_ending, mtime, cx);
5685                });
5686            }
5687            Ok(())
5688        })
5689    }
5690
5691    #[allow(clippy::type_complexity)]
5692    fn edits_from_lsp(
5693        &mut self,
5694        buffer: &ModelHandle<Buffer>,
5695        lsp_edits: impl 'static + Send + IntoIterator<Item = lsp::TextEdit>,
5696        version: Option<i32>,
5697        cx: &mut ModelContext<Self>,
5698    ) -> Task<Result<Vec<(Range<Anchor>, String)>>> {
5699        let snapshot = self.buffer_snapshot_for_lsp_version(buffer, version, cx);
5700        cx.background().spawn(async move {
5701            let snapshot = snapshot?;
5702            let mut lsp_edits = lsp_edits
5703                .into_iter()
5704                .map(|edit| (range_from_lsp(edit.range), edit.new_text))
5705                .collect::<Vec<_>>();
5706            lsp_edits.sort_by_key(|(range, _)| range.start);
5707
5708            let mut lsp_edits = lsp_edits.into_iter().peekable();
5709            let mut edits = Vec::new();
5710            while let Some((mut range, mut new_text)) = lsp_edits.next() {
5711                // Clip invalid ranges provided by the language server.
5712                range.start = snapshot.clip_point_utf16(range.start, Bias::Left);
5713                range.end = snapshot.clip_point_utf16(range.end, Bias::Left);
5714
5715                // Combine any LSP edits that are adjacent.
5716                //
5717                // Also, combine LSP edits that are separated from each other by only
5718                // a newline. This is important because for some code actions,
5719                // Rust-analyzer rewrites the entire buffer via a series of edits that
5720                // are separated by unchanged newline characters.
5721                //
5722                // In order for the diffing logic below to work properly, any edits that
5723                // cancel each other out must be combined into one.
5724                while let Some((next_range, next_text)) = lsp_edits.peek() {
5725                    if next_range.start > range.end {
5726                        if next_range.start.row > range.end.row + 1
5727                            || next_range.start.column > 0
5728                            || snapshot.clip_point_utf16(
5729                                PointUtf16::new(range.end.row, u32::MAX),
5730                                Bias::Left,
5731                            ) > range.end
5732                        {
5733                            break;
5734                        }
5735                        new_text.push('\n');
5736                    }
5737                    range.end = next_range.end;
5738                    new_text.push_str(next_text);
5739                    lsp_edits.next();
5740                }
5741
5742                // For multiline edits, perform a diff of the old and new text so that
5743                // we can identify the changes more precisely, preserving the locations
5744                // of any anchors positioned in the unchanged regions.
5745                if range.end.row > range.start.row {
5746                    let mut offset = range.start.to_offset_clamped(&snapshot);
5747                    let old_text = snapshot.text_for_clamped_range(range).collect::<String>();
5748
5749                    let diff = TextDiff::from_lines(old_text.as_str(), &new_text);
5750                    let mut moved_since_edit = true;
5751                    for change in diff.iter_all_changes() {
5752                        let tag = change.tag();
5753                        let value = change.value();
5754                        match tag {
5755                            ChangeTag::Equal => {
5756                                offset += value.len();
5757                                moved_since_edit = true;
5758                            }
5759                            ChangeTag::Delete => {
5760                                let start = snapshot.anchor_after(offset);
5761                                let end = snapshot.anchor_before(offset + value.len());
5762                                if moved_since_edit {
5763                                    edits.push((start..end, String::new()));
5764                                } else {
5765                                    edits.last_mut().unwrap().0.end = end;
5766                                }
5767                                offset += value.len();
5768                                moved_since_edit = false;
5769                            }
5770                            ChangeTag::Insert => {
5771                                if moved_since_edit {
5772                                    let anchor = snapshot.anchor_after(offset);
5773                                    edits.push((anchor..anchor, value.to_string()));
5774                                } else {
5775                                    edits.last_mut().unwrap().1.push_str(value);
5776                                }
5777                                moved_since_edit = false;
5778                            }
5779                        }
5780                    }
5781                } else if range.end == range.start {
5782                    let anchor = snapshot.clamped_anchor_after(range.start);
5783                    edits.push((anchor..anchor, new_text));
5784                } else {
5785                    let edit_start = snapshot.clamped_anchor_after(range.start);
5786                    let edit_end = snapshot.clamped_anchor_before(range.end);
5787                    edits.push((edit_start..edit_end, new_text));
5788                }
5789            }
5790
5791            Ok(edits)
5792        })
5793    }
5794
5795    fn buffer_snapshot_for_lsp_version(
5796        &mut self,
5797        buffer: &ModelHandle<Buffer>,
5798        version: Option<i32>,
5799        cx: &AppContext,
5800    ) -> Result<TextBufferSnapshot> {
5801        const OLD_VERSIONS_TO_RETAIN: i32 = 10;
5802
5803        if let Some(version) = version {
5804            let buffer_id = buffer.read(cx).remote_id();
5805            let snapshots = self
5806                .buffer_snapshots
5807                .get_mut(&buffer_id)
5808                .ok_or_else(|| anyhow!("no snapshot found for buffer {}", buffer_id))?;
5809            let mut found_snapshot = None;
5810            snapshots.retain(|(snapshot_version, snapshot)| {
5811                if snapshot_version + OLD_VERSIONS_TO_RETAIN < version {
5812                    false
5813                } else {
5814                    if *snapshot_version == version {
5815                        found_snapshot = Some(snapshot.clone());
5816                    }
5817                    true
5818                }
5819            });
5820
5821            found_snapshot.ok_or_else(|| {
5822                anyhow!(
5823                    "snapshot not found for buffer {} at version {}",
5824                    buffer_id,
5825                    version
5826                )
5827            })
5828        } else {
5829            Ok((buffer.read(cx)).text_snapshot())
5830        }
5831    }
5832
5833    fn language_server_for_buffer(
5834        &self,
5835        buffer: &Buffer,
5836        cx: &AppContext,
5837    ) -> Option<(&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
5838        if let Some((file, language)) = File::from_dyn(buffer.file()).zip(buffer.language()) {
5839            let name = language.lsp_adapter()?.name.clone();
5840            let worktree_id = file.worktree_id(cx);
5841            let key = (worktree_id, name);
5842
5843            if let Some(server_id) = self.language_server_ids.get(&key) {
5844                if let Some(LanguageServerState::Running {
5845                    adapter, server, ..
5846                }) = self.language_servers.get(server_id)
5847                {
5848                    return Some((adapter, server));
5849                }
5850            }
5851        }
5852
5853        None
5854    }
5855}
5856
5857impl ProjectStore {
5858    pub fn new() -> Self {
5859        Self {
5860            projects: Default::default(),
5861        }
5862    }
5863
5864    pub fn projects<'a>(
5865        &'a self,
5866        cx: &'a AppContext,
5867    ) -> impl 'a + Iterator<Item = ModelHandle<Project>> {
5868        self.projects
5869            .iter()
5870            .filter_map(|project| project.upgrade(cx))
5871    }
5872
5873    fn add_project(&mut self, project: WeakModelHandle<Project>, cx: &mut ModelContext<Self>) {
5874        if let Err(ix) = self
5875            .projects
5876            .binary_search_by_key(&project.id(), WeakModelHandle::id)
5877        {
5878            self.projects.insert(ix, project);
5879        }
5880        cx.notify();
5881    }
5882
5883    fn prune_projects(&mut self, cx: &mut ModelContext<Self>) {
5884        let mut did_change = false;
5885        self.projects.retain(|project| {
5886            if project.is_upgradable(cx) {
5887                true
5888            } else {
5889                did_change = true;
5890                false
5891            }
5892        });
5893        if did_change {
5894            cx.notify();
5895        }
5896    }
5897}
5898
5899impl WorktreeHandle {
5900    pub fn upgrade(&self, cx: &AppContext) -> Option<ModelHandle<Worktree>> {
5901        match self {
5902            WorktreeHandle::Strong(handle) => Some(handle.clone()),
5903            WorktreeHandle::Weak(handle) => handle.upgrade(cx),
5904        }
5905    }
5906}
5907
5908impl OpenBuffer {
5909    pub fn upgrade(&self, cx: &impl UpgradeModelHandle) -> Option<ModelHandle<Buffer>> {
5910        match self {
5911            OpenBuffer::Strong(handle) => Some(handle.clone()),
5912            OpenBuffer::Weak(handle) => handle.upgrade(cx),
5913            OpenBuffer::Operations(_) => None,
5914        }
5915    }
5916}
5917
5918pub struct PathMatchCandidateSet {
5919    pub snapshot: Snapshot,
5920    pub include_ignored: bool,
5921    pub include_root_name: bool,
5922}
5923
5924impl<'a> fuzzy::PathMatchCandidateSet<'a> for PathMatchCandidateSet {
5925    type Candidates = PathMatchCandidateSetIter<'a>;
5926
5927    fn id(&self) -> usize {
5928        self.snapshot.id().to_usize()
5929    }
5930
5931    fn len(&self) -> usize {
5932        if self.include_ignored {
5933            self.snapshot.file_count()
5934        } else {
5935            self.snapshot.visible_file_count()
5936        }
5937    }
5938
5939    fn prefix(&self) -> Arc<str> {
5940        if self.snapshot.root_entry().map_or(false, |e| e.is_file()) {
5941            self.snapshot.root_name().into()
5942        } else if self.include_root_name {
5943            format!("{}/", self.snapshot.root_name()).into()
5944        } else {
5945            "".into()
5946        }
5947    }
5948
5949    fn candidates(&'a self, start: usize) -> Self::Candidates {
5950        PathMatchCandidateSetIter {
5951            traversal: self.snapshot.files(self.include_ignored, start),
5952        }
5953    }
5954}
5955
5956pub struct PathMatchCandidateSetIter<'a> {
5957    traversal: Traversal<'a>,
5958}
5959
5960impl<'a> Iterator for PathMatchCandidateSetIter<'a> {
5961    type Item = fuzzy::PathMatchCandidate<'a>;
5962
5963    fn next(&mut self) -> Option<Self::Item> {
5964        self.traversal.next().map(|entry| {
5965            if let EntryKind::File(char_bag) = entry.kind {
5966                fuzzy::PathMatchCandidate {
5967                    path: &entry.path,
5968                    char_bag,
5969                }
5970            } else {
5971                unreachable!()
5972            }
5973        })
5974    }
5975}
5976
5977impl Entity for ProjectStore {
5978    type Event = ();
5979}
5980
5981impl Entity for Project {
5982    type Event = Event;
5983
5984    fn release(&mut self, cx: &mut gpui::MutableAppContext) {
5985        self.project_store.update(cx, ProjectStore::prune_projects);
5986
5987        match &self.client_state {
5988            Some(ProjectClientState::Local { remote_id, .. }) => {
5989                self.client
5990                    .send(proto::UnshareProject {
5991                        project_id: *remote_id,
5992                    })
5993                    .log_err();
5994            }
5995            Some(ProjectClientState::Remote { remote_id, .. }) => {
5996                self.client
5997                    .send(proto::LeaveProject {
5998                        project_id: *remote_id,
5999                    })
6000                    .log_err();
6001            }
6002            _ => {}
6003        }
6004    }
6005
6006    fn app_will_quit(
6007        &mut self,
6008        _: &mut MutableAppContext,
6009    ) -> Option<std::pin::Pin<Box<dyn 'static + Future<Output = ()>>>> {
6010        let shutdown_futures = self
6011            .language_servers
6012            .drain()
6013            .map(|(_, server_state)| async {
6014                match server_state {
6015                    LanguageServerState::Running { server, .. } => server.shutdown()?.await,
6016                    LanguageServerState::Starting(starting_server) => {
6017                        starting_server.await?.shutdown()?.await
6018                    }
6019                }
6020            })
6021            .collect::<Vec<_>>();
6022
6023        Some(
6024            async move {
6025                futures::future::join_all(shutdown_futures).await;
6026            }
6027            .boxed(),
6028        )
6029    }
6030}
6031
6032impl Collaborator {
6033    fn from_proto(message: proto::Collaborator) -> Self {
6034        Self {
6035            peer_id: PeerId(message.peer_id),
6036            replica_id: message.replica_id as ReplicaId,
6037        }
6038    }
6039}
6040
6041impl<P: AsRef<Path>> From<(WorktreeId, P)> for ProjectPath {
6042    fn from((worktree_id, path): (WorktreeId, P)) -> Self {
6043        Self {
6044            worktree_id,
6045            path: path.as_ref().into(),
6046        }
6047    }
6048}
6049
6050fn serialize_symbol(symbol: &Symbol) -> proto::Symbol {
6051    proto::Symbol {
6052        language_server_name: symbol.language_server_name.0.to_string(),
6053        source_worktree_id: symbol.source_worktree_id.to_proto(),
6054        worktree_id: symbol.path.worktree_id.to_proto(),
6055        path: symbol.path.path.to_string_lossy().to_string(),
6056        name: symbol.name.clone(),
6057        kind: unsafe { mem::transmute(symbol.kind) },
6058        start: Some(proto::Point {
6059            row: symbol.range.start.row,
6060            column: symbol.range.start.column,
6061        }),
6062        end: Some(proto::Point {
6063            row: symbol.range.end.row,
6064            column: symbol.range.end.column,
6065        }),
6066        signature: symbol.signature.to_vec(),
6067    }
6068}
6069
6070fn relativize_path(base: &Path, path: &Path) -> PathBuf {
6071    let mut path_components = path.components();
6072    let mut base_components = base.components();
6073    let mut components: Vec<Component> = Vec::new();
6074    loop {
6075        match (path_components.next(), base_components.next()) {
6076            (None, None) => break,
6077            (Some(a), None) => {
6078                components.push(a);
6079                components.extend(path_components.by_ref());
6080                break;
6081            }
6082            (None, _) => components.push(Component::ParentDir),
6083            (Some(a), Some(b)) if components.is_empty() && a == b => (),
6084            (Some(a), Some(b)) if b == Component::CurDir => components.push(a),
6085            (Some(a), Some(_)) => {
6086                components.push(Component::ParentDir);
6087                for _ in base_components {
6088                    components.push(Component::ParentDir);
6089                }
6090                components.push(a);
6091                components.extend(path_components.by_ref());
6092                break;
6093            }
6094        }
6095    }
6096    components.iter().map(|c| c.as_os_str()).collect()
6097}
6098
6099impl Item for Buffer {
6100    fn entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId> {
6101        File::from_dyn(self.file()).and_then(|file| file.project_entry_id(cx))
6102    }
6103}