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, ToPointUtf16, Transaction,
  29    Unclipped,
  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<Unclipped<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<Unclipped<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<Unclipped<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::<Unclipped<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 codepoint
2684            if range.start == range.end {
2685                // This will be go to the next boundary when being clipped
2686                range.end.column += 1;
2687                range.end = snapshot.clip_point_utf16(Unclipped(range.end), Bias::Right);
2688                if range.start == range.end && range.end.column > 0 {
2689                    range.start.column -= 1;
2690                    range.end = snapshot.clip_point_utf16(Unclipped(range.end), Bias::Left);
2691                }
2692            }
2693
2694            sanitized_diagnostics.push(DiagnosticEntry {
2695                range,
2696                diagnostic: entry.diagnostic,
2697            });
2698        }
2699        drop(edits_since_save);
2700
2701        let set = DiagnosticSet::new(sanitized_diagnostics, &snapshot);
2702        buffer.update(cx, |buffer, cx| buffer.update_diagnostics(set, cx));
2703        Ok(())
2704    }
2705
2706    pub fn reload_buffers(
2707        &self,
2708        buffers: HashSet<ModelHandle<Buffer>>,
2709        push_to_history: bool,
2710        cx: &mut ModelContext<Self>,
2711    ) -> Task<Result<ProjectTransaction>> {
2712        let mut local_buffers = Vec::new();
2713        let mut remote_buffers = None;
2714        for buffer_handle in buffers {
2715            let buffer = buffer_handle.read(cx);
2716            if buffer.is_dirty() {
2717                if let Some(file) = File::from_dyn(buffer.file()) {
2718                    if file.is_local() {
2719                        local_buffers.push(buffer_handle);
2720                    } else {
2721                        remote_buffers.get_or_insert(Vec::new()).push(buffer_handle);
2722                    }
2723                }
2724            }
2725        }
2726
2727        let remote_buffers = self.remote_id().zip(remote_buffers);
2728        let client = self.client.clone();
2729
2730        cx.spawn(|this, mut cx| async move {
2731            let mut project_transaction = ProjectTransaction::default();
2732
2733            if let Some((project_id, remote_buffers)) = remote_buffers {
2734                let response = client
2735                    .request(proto::ReloadBuffers {
2736                        project_id,
2737                        buffer_ids: remote_buffers
2738                            .iter()
2739                            .map(|buffer| buffer.read_with(&cx, |buffer, _| buffer.remote_id()))
2740                            .collect(),
2741                    })
2742                    .await?
2743                    .transaction
2744                    .ok_or_else(|| anyhow!("missing transaction"))?;
2745                project_transaction = this
2746                    .update(&mut cx, |this, cx| {
2747                        this.deserialize_project_transaction(response, push_to_history, cx)
2748                    })
2749                    .await?;
2750            }
2751
2752            for buffer in local_buffers {
2753                let transaction = buffer
2754                    .update(&mut cx, |buffer, cx| buffer.reload(cx))
2755                    .await?;
2756                buffer.update(&mut cx, |buffer, cx| {
2757                    if let Some(transaction) = transaction {
2758                        if !push_to_history {
2759                            buffer.forget_transaction(transaction.id);
2760                        }
2761                        project_transaction.0.insert(cx.handle(), transaction);
2762                    }
2763                });
2764            }
2765
2766            Ok(project_transaction)
2767        })
2768    }
2769
2770    pub fn format(
2771        &self,
2772        buffers: HashSet<ModelHandle<Buffer>>,
2773        push_to_history: bool,
2774        trigger: FormatTrigger,
2775        cx: &mut ModelContext<Project>,
2776    ) -> Task<Result<ProjectTransaction>> {
2777        let mut local_buffers = Vec::new();
2778        let mut remote_buffers = None;
2779        for buffer_handle in buffers {
2780            let buffer = buffer_handle.read(cx);
2781            if let Some(file) = File::from_dyn(buffer.file()) {
2782                if let Some(buffer_abs_path) = file.as_local().map(|f| f.abs_path(cx)) {
2783                    if let Some((_, server)) = self.language_server_for_buffer(buffer, cx) {
2784                        local_buffers.push((buffer_handle, buffer_abs_path, server.clone()));
2785                    }
2786                } else {
2787                    remote_buffers.get_or_insert(Vec::new()).push(buffer_handle);
2788                }
2789            } else {
2790                return Task::ready(Ok(Default::default()));
2791            }
2792        }
2793
2794        let remote_buffers = self.remote_id().zip(remote_buffers);
2795        let client = self.client.clone();
2796
2797        cx.spawn(|this, mut cx| async move {
2798            let mut project_transaction = ProjectTransaction::default();
2799
2800            if let Some((project_id, remote_buffers)) = remote_buffers {
2801                let response = client
2802                    .request(proto::FormatBuffers {
2803                        project_id,
2804                        trigger: trigger as i32,
2805                        buffer_ids: remote_buffers
2806                            .iter()
2807                            .map(|buffer| buffer.read_with(&cx, |buffer, _| buffer.remote_id()))
2808                            .collect(),
2809                    })
2810                    .await?
2811                    .transaction
2812                    .ok_or_else(|| anyhow!("missing transaction"))?;
2813                project_transaction = this
2814                    .update(&mut cx, |this, cx| {
2815                        this.deserialize_project_transaction(response, push_to_history, cx)
2816                    })
2817                    .await?;
2818            }
2819
2820            // Do not allow multiple concurrent formatting requests for the
2821            // same buffer.
2822            this.update(&mut cx, |this, _| {
2823                local_buffers
2824                    .retain(|(buffer, _, _)| this.buffers_being_formatted.insert(buffer.id()));
2825            });
2826            let _cleanup = defer({
2827                let this = this.clone();
2828                let mut cx = cx.clone();
2829                let local_buffers = &local_buffers;
2830                move || {
2831                    this.update(&mut cx, |this, _| {
2832                        for (buffer, _, _) in local_buffers {
2833                            this.buffers_being_formatted.remove(&buffer.id());
2834                        }
2835                    });
2836                }
2837            });
2838
2839            for (buffer, buffer_abs_path, language_server) in &local_buffers {
2840                let (format_on_save, formatter, tab_size) = buffer.read_with(&cx, |buffer, cx| {
2841                    let settings = cx.global::<Settings>();
2842                    let language_name = buffer.language().map(|language| language.name());
2843                    (
2844                        settings.format_on_save(language_name.as_deref()),
2845                        settings.formatter(language_name.as_deref()),
2846                        settings.tab_size(language_name.as_deref()),
2847                    )
2848                });
2849
2850                let transaction = match (formatter, format_on_save) {
2851                    (_, FormatOnSave::Off) if trigger == FormatTrigger::Save => continue,
2852
2853                    (Formatter::LanguageServer, FormatOnSave::On | FormatOnSave::Off)
2854                    | (_, FormatOnSave::LanguageServer) => Self::format_via_lsp(
2855                        &this,
2856                        &buffer,
2857                        &buffer_abs_path,
2858                        &language_server,
2859                        tab_size,
2860                        &mut cx,
2861                    )
2862                    .await
2863                    .context("failed to format via language server")?,
2864
2865                    (
2866                        Formatter::External { command, arguments },
2867                        FormatOnSave::On | FormatOnSave::Off,
2868                    )
2869                    | (_, FormatOnSave::External { command, arguments }) => {
2870                        Self::format_via_external_command(
2871                            &buffer,
2872                            &buffer_abs_path,
2873                            &command,
2874                            &arguments,
2875                            &mut cx,
2876                        )
2877                        .await
2878                        .context(format!(
2879                            "failed to format via external command {:?}",
2880                            command
2881                        ))?
2882                    }
2883                };
2884
2885                if let Some(transaction) = transaction {
2886                    if !push_to_history {
2887                        buffer.update(&mut cx, |buffer, _| {
2888                            buffer.forget_transaction(transaction.id)
2889                        });
2890                    }
2891                    project_transaction.0.insert(buffer.clone(), transaction);
2892                }
2893            }
2894
2895            Ok(project_transaction)
2896        })
2897    }
2898
2899    async fn format_via_lsp(
2900        this: &ModelHandle<Self>,
2901        buffer: &ModelHandle<Buffer>,
2902        abs_path: &Path,
2903        language_server: &Arc<LanguageServer>,
2904        tab_size: NonZeroU32,
2905        cx: &mut AsyncAppContext,
2906    ) -> Result<Option<Transaction>> {
2907        let text_document =
2908            lsp::TextDocumentIdentifier::new(lsp::Url::from_file_path(abs_path).unwrap());
2909        let capabilities = &language_server.capabilities();
2910        let lsp_edits = if capabilities
2911            .document_formatting_provider
2912            .as_ref()
2913            .map_or(false, |provider| *provider != lsp::OneOf::Left(false))
2914        {
2915            language_server
2916                .request::<lsp::request::Formatting>(lsp::DocumentFormattingParams {
2917                    text_document,
2918                    options: lsp::FormattingOptions {
2919                        tab_size: tab_size.into(),
2920                        insert_spaces: true,
2921                        insert_final_newline: Some(true),
2922                        ..Default::default()
2923                    },
2924                    work_done_progress_params: Default::default(),
2925                })
2926                .await?
2927        } else if capabilities
2928            .document_range_formatting_provider
2929            .as_ref()
2930            .map_or(false, |provider| *provider != lsp::OneOf::Left(false))
2931        {
2932            let buffer_start = lsp::Position::new(0, 0);
2933            let buffer_end =
2934                buffer.read_with(cx, |buffer, _| point_to_lsp(buffer.max_point_utf16()));
2935            language_server
2936                .request::<lsp::request::RangeFormatting>(lsp::DocumentRangeFormattingParams {
2937                    text_document,
2938                    range: lsp::Range::new(buffer_start, buffer_end),
2939                    options: lsp::FormattingOptions {
2940                        tab_size: tab_size.into(),
2941                        insert_spaces: true,
2942                        insert_final_newline: Some(true),
2943                        ..Default::default()
2944                    },
2945                    work_done_progress_params: Default::default(),
2946                })
2947                .await?
2948        } else {
2949            None
2950        };
2951
2952        if let Some(lsp_edits) = lsp_edits {
2953            let edits = this
2954                .update(cx, |this, cx| {
2955                    this.edits_from_lsp(buffer, lsp_edits, None, cx)
2956                })
2957                .await?;
2958            buffer.update(cx, |buffer, cx| {
2959                buffer.finalize_last_transaction();
2960                buffer.start_transaction();
2961                for (range, text) in edits {
2962                    buffer.edit([(range, text)], None, cx);
2963                }
2964                if buffer.end_transaction(cx).is_some() {
2965                    let transaction = buffer.finalize_last_transaction().unwrap().clone();
2966                    Ok(Some(transaction))
2967                } else {
2968                    Ok(None)
2969                }
2970            })
2971        } else {
2972            Ok(None)
2973        }
2974    }
2975
2976    async fn format_via_external_command(
2977        buffer: &ModelHandle<Buffer>,
2978        buffer_abs_path: &Path,
2979        command: &str,
2980        arguments: &[String],
2981        cx: &mut AsyncAppContext,
2982    ) -> Result<Option<Transaction>> {
2983        let working_dir_path = buffer.read_with(cx, |buffer, cx| {
2984            let file = File::from_dyn(buffer.file())?;
2985            let worktree = file.worktree.read(cx).as_local()?;
2986            let mut worktree_path = worktree.abs_path().to_path_buf();
2987            if worktree.root_entry()?.is_file() {
2988                worktree_path.pop();
2989            }
2990            Some(worktree_path)
2991        });
2992
2993        if let Some(working_dir_path) = working_dir_path {
2994            let mut child =
2995                smol::process::Command::new(command)
2996                    .args(arguments.iter().map(|arg| {
2997                        arg.replace("{buffer_path}", &buffer_abs_path.to_string_lossy())
2998                    }))
2999                    .current_dir(&working_dir_path)
3000                    .stdin(smol::process::Stdio::piped())
3001                    .stdout(smol::process::Stdio::piped())
3002                    .stderr(smol::process::Stdio::piped())
3003                    .spawn()?;
3004            let stdin = child
3005                .stdin
3006                .as_mut()
3007                .ok_or_else(|| anyhow!("failed to acquire stdin"))?;
3008            let text = buffer.read_with(cx, |buffer, _| buffer.as_rope().clone());
3009            for chunk in text.chunks() {
3010                stdin.write_all(chunk.as_bytes()).await?;
3011            }
3012            stdin.flush().await?;
3013
3014            let output = child.output().await?;
3015            if !output.status.success() {
3016                return Err(anyhow!(
3017                    "command failed with exit code {:?}:\nstdout: {}\nstderr: {}",
3018                    output.status.code(),
3019                    String::from_utf8_lossy(&output.stdout),
3020                    String::from_utf8_lossy(&output.stderr),
3021                ));
3022            }
3023
3024            let stdout = String::from_utf8(output.stdout)?;
3025            let diff = buffer
3026                .read_with(cx, |buffer, cx| buffer.diff(stdout, cx))
3027                .await;
3028            Ok(buffer.update(cx, |buffer, cx| buffer.apply_diff(diff, cx).cloned()))
3029        } else {
3030            Ok(None)
3031        }
3032    }
3033
3034    pub fn definition<T: ToPointUtf16>(
3035        &self,
3036        buffer: &ModelHandle<Buffer>,
3037        position: T,
3038        cx: &mut ModelContext<Self>,
3039    ) -> Task<Result<Vec<LocationLink>>> {
3040        let position = position.to_point_utf16(buffer.read(cx));
3041        self.request_lsp(buffer.clone(), GetDefinition { position }, cx)
3042    }
3043
3044    pub fn type_definition<T: ToPointUtf16>(
3045        &self,
3046        buffer: &ModelHandle<Buffer>,
3047        position: T,
3048        cx: &mut ModelContext<Self>,
3049    ) -> Task<Result<Vec<LocationLink>>> {
3050        let position = position.to_point_utf16(buffer.read(cx));
3051        self.request_lsp(buffer.clone(), GetTypeDefinition { position }, cx)
3052    }
3053
3054    pub fn references<T: ToPointUtf16>(
3055        &self,
3056        buffer: &ModelHandle<Buffer>,
3057        position: T,
3058        cx: &mut ModelContext<Self>,
3059    ) -> Task<Result<Vec<Location>>> {
3060        let position = position.to_point_utf16(buffer.read(cx));
3061        self.request_lsp(buffer.clone(), GetReferences { position }, cx)
3062    }
3063
3064    pub fn document_highlights<T: ToPointUtf16>(
3065        &self,
3066        buffer: &ModelHandle<Buffer>,
3067        position: T,
3068        cx: &mut ModelContext<Self>,
3069    ) -> Task<Result<Vec<DocumentHighlight>>> {
3070        let position = position.to_point_utf16(buffer.read(cx));
3071        self.request_lsp(buffer.clone(), GetDocumentHighlights { position }, cx)
3072    }
3073
3074    pub fn symbols(&self, query: &str, cx: &mut ModelContext<Self>) -> Task<Result<Vec<Symbol>>> {
3075        if self.is_local() {
3076            let mut requests = Vec::new();
3077            for ((worktree_id, _), server_id) in self.language_server_ids.iter() {
3078                let worktree_id = *worktree_id;
3079                if let Some(worktree) = self
3080                    .worktree_for_id(worktree_id, cx)
3081                    .and_then(|worktree| worktree.read(cx).as_local())
3082                {
3083                    if let Some(LanguageServerState::Running {
3084                        adapter,
3085                        language,
3086                        server,
3087                    }) = self.language_servers.get(server_id)
3088                    {
3089                        let adapter = adapter.clone();
3090                        let language = language.clone();
3091                        let worktree_abs_path = worktree.abs_path().clone();
3092                        requests.push(
3093                            server
3094                                .request::<lsp::request::WorkspaceSymbol>(
3095                                    lsp::WorkspaceSymbolParams {
3096                                        query: query.to_string(),
3097                                        ..Default::default()
3098                                    },
3099                                )
3100                                .log_err()
3101                                .map(move |response| {
3102                                    (
3103                                        adapter,
3104                                        language,
3105                                        worktree_id,
3106                                        worktree_abs_path,
3107                                        response.unwrap_or_default(),
3108                                    )
3109                                }),
3110                        );
3111                    }
3112                }
3113            }
3114
3115            cx.spawn_weak(|this, cx| async move {
3116                let responses = futures::future::join_all(requests).await;
3117                let this = if let Some(this) = this.upgrade(&cx) {
3118                    this
3119                } else {
3120                    return Ok(Default::default());
3121                };
3122                let symbols = this.read_with(&cx, |this, cx| {
3123                    let mut symbols = Vec::new();
3124                    for (
3125                        adapter,
3126                        adapter_language,
3127                        source_worktree_id,
3128                        worktree_abs_path,
3129                        response,
3130                    ) in responses
3131                    {
3132                        symbols.extend(response.into_iter().flatten().filter_map(|lsp_symbol| {
3133                            let abs_path = lsp_symbol.location.uri.to_file_path().ok()?;
3134                            let mut worktree_id = source_worktree_id;
3135                            let path;
3136                            if let Some((worktree, rel_path)) =
3137                                this.find_local_worktree(&abs_path, cx)
3138                            {
3139                                worktree_id = worktree.read(cx).id();
3140                                path = rel_path;
3141                            } else {
3142                                path = relativize_path(&worktree_abs_path, &abs_path);
3143                            }
3144
3145                            let project_path = ProjectPath {
3146                                worktree_id,
3147                                path: path.into(),
3148                            };
3149                            let signature = this.symbol_signature(&project_path);
3150                            let language = this
3151                                .languages
3152                                .select_language(&project_path.path)
3153                                .unwrap_or(adapter_language.clone());
3154                            let language_server_name = adapter.name.clone();
3155                            Some(async move {
3156                                let label = language
3157                                    .label_for_symbol(&lsp_symbol.name, lsp_symbol.kind)
3158                                    .await;
3159
3160                                Symbol {
3161                                    language_server_name,
3162                                    source_worktree_id,
3163                                    path: project_path,
3164                                    label: label.unwrap_or_else(|| {
3165                                        CodeLabel::plain(lsp_symbol.name.clone(), None)
3166                                    }),
3167                                    kind: lsp_symbol.kind,
3168                                    name: lsp_symbol.name,
3169                                    range: range_from_lsp(lsp_symbol.location.range),
3170                                    signature,
3171                                }
3172                            })
3173                        }));
3174                    }
3175                    symbols
3176                });
3177                Ok(futures::future::join_all(symbols).await)
3178            })
3179        } else if let Some(project_id) = self.remote_id() {
3180            let request = self.client.request(proto::GetProjectSymbols {
3181                project_id,
3182                query: query.to_string(),
3183            });
3184            cx.spawn_weak(|this, cx| async move {
3185                let response = request.await?;
3186                let mut symbols = Vec::new();
3187                if let Some(this) = this.upgrade(&cx) {
3188                    let new_symbols = this.read_with(&cx, |this, _| {
3189                        response
3190                            .symbols
3191                            .into_iter()
3192                            .map(|symbol| this.deserialize_symbol(symbol))
3193                            .collect::<Vec<_>>()
3194                    });
3195                    symbols = futures::future::join_all(new_symbols)
3196                        .await
3197                        .into_iter()
3198                        .filter_map(|symbol| symbol.log_err())
3199                        .collect::<Vec<_>>();
3200                }
3201                Ok(symbols)
3202            })
3203        } else {
3204            Task::ready(Ok(Default::default()))
3205        }
3206    }
3207
3208    pub fn open_buffer_for_symbol(
3209        &mut self,
3210        symbol: &Symbol,
3211        cx: &mut ModelContext<Self>,
3212    ) -> Task<Result<ModelHandle<Buffer>>> {
3213        if self.is_local() {
3214            let language_server_id = if let Some(id) = self.language_server_ids.get(&(
3215                symbol.source_worktree_id,
3216                symbol.language_server_name.clone(),
3217            )) {
3218                *id
3219            } else {
3220                return Task::ready(Err(anyhow!(
3221                    "language server for worktree and language not found"
3222                )));
3223            };
3224
3225            let worktree_abs_path = if let Some(worktree_abs_path) = self
3226                .worktree_for_id(symbol.path.worktree_id, cx)
3227                .and_then(|worktree| worktree.read(cx).as_local())
3228                .map(|local_worktree| local_worktree.abs_path())
3229            {
3230                worktree_abs_path
3231            } else {
3232                return Task::ready(Err(anyhow!("worktree not found for symbol")));
3233            };
3234            let symbol_abs_path = worktree_abs_path.join(&symbol.path.path);
3235            let symbol_uri = if let Ok(uri) = lsp::Url::from_file_path(symbol_abs_path) {
3236                uri
3237            } else {
3238                return Task::ready(Err(anyhow!("invalid symbol path")));
3239            };
3240
3241            self.open_local_buffer_via_lsp(
3242                symbol_uri,
3243                language_server_id,
3244                symbol.language_server_name.clone(),
3245                cx,
3246            )
3247        } else if let Some(project_id) = self.remote_id() {
3248            let request = self.client.request(proto::OpenBufferForSymbol {
3249                project_id,
3250                symbol: Some(serialize_symbol(symbol)),
3251            });
3252            cx.spawn(|this, mut cx| async move {
3253                let response = request.await?;
3254                this.update(&mut cx, |this, cx| {
3255                    this.wait_for_buffer(response.buffer_id, cx)
3256                })
3257                .await
3258            })
3259        } else {
3260            Task::ready(Err(anyhow!("project does not have a remote id")))
3261        }
3262    }
3263
3264    pub fn hover<T: ToPointUtf16>(
3265        &self,
3266        buffer: &ModelHandle<Buffer>,
3267        position: T,
3268        cx: &mut ModelContext<Self>,
3269    ) -> Task<Result<Option<Hover>>> {
3270        let position = position.to_point_utf16(buffer.read(cx));
3271        self.request_lsp(buffer.clone(), GetHover { position }, cx)
3272    }
3273
3274    pub fn completions<T: ToPointUtf16>(
3275        &self,
3276        source_buffer_handle: &ModelHandle<Buffer>,
3277        position: T,
3278        cx: &mut ModelContext<Self>,
3279    ) -> Task<Result<Vec<Completion>>> {
3280        let source_buffer_handle = source_buffer_handle.clone();
3281        let source_buffer = source_buffer_handle.read(cx);
3282        let buffer_id = source_buffer.remote_id();
3283        let language = source_buffer.language().cloned();
3284        let worktree;
3285        let buffer_abs_path;
3286        if let Some(file) = File::from_dyn(source_buffer.file()) {
3287            worktree = file.worktree.clone();
3288            buffer_abs_path = file.as_local().map(|f| f.abs_path(cx));
3289        } else {
3290            return Task::ready(Ok(Default::default()));
3291        };
3292
3293        let position = Unclipped(position.to_point_utf16(source_buffer));
3294        let anchor = source_buffer.anchor_after(position);
3295
3296        if worktree.read(cx).as_local().is_some() {
3297            let buffer_abs_path = buffer_abs_path.unwrap();
3298            let lang_server =
3299                if let Some((_, server)) = self.language_server_for_buffer(source_buffer, cx) {
3300                    server.clone()
3301                } else {
3302                    return Task::ready(Ok(Default::default()));
3303                };
3304
3305            cx.spawn(|_, cx| async move {
3306                let completions = lang_server
3307                    .request::<lsp::request::Completion>(lsp::CompletionParams {
3308                        text_document_position: lsp::TextDocumentPositionParams::new(
3309                            lsp::TextDocumentIdentifier::new(
3310                                lsp::Url::from_file_path(buffer_abs_path).unwrap(),
3311                            ),
3312                            point_to_lsp(position.0),
3313                        ),
3314                        context: Default::default(),
3315                        work_done_progress_params: Default::default(),
3316                        partial_result_params: Default::default(),
3317                    })
3318                    .await
3319                    .context("lsp completion request failed")?;
3320
3321                let completions = if let Some(completions) = completions {
3322                    match completions {
3323                        lsp::CompletionResponse::Array(completions) => completions,
3324                        lsp::CompletionResponse::List(list) => list.items,
3325                    }
3326                } else {
3327                    Default::default()
3328                };
3329
3330                let completions = source_buffer_handle.read_with(&cx, |this, _| {
3331                    let snapshot = this.snapshot();
3332                    let clipped_position = this.clip_point_utf16(position, Bias::Left);
3333                    let mut range_for_token = None;
3334                    completions
3335                        .into_iter()
3336                        .filter_map(move |mut lsp_completion| {
3337                            // For now, we can only handle additional edits if they are returned
3338                            // when resolving the completion, not if they are present initially.
3339                            if lsp_completion
3340                                .additional_text_edits
3341                                .as_ref()
3342                                .map_or(false, |edits| !edits.is_empty())
3343                            {
3344                                return None;
3345                            }
3346
3347                            let (old_range, mut new_text) = match lsp_completion.text_edit.as_ref()
3348                            {
3349                                // If the language server provides a range to overwrite, then
3350                                // check that the range is valid.
3351                                Some(lsp::CompletionTextEdit::Edit(edit)) => {
3352                                    let range = range_from_lsp(edit.range);
3353                                    let start = snapshot.clip_point_utf16(range.start, Bias::Left);
3354                                    let end = snapshot.clip_point_utf16(range.end, Bias::Left);
3355                                    if start != range.start.0 || end != range.end.0 {
3356                                        log::info!("completion out of expected range");
3357                                        return None;
3358                                    }
3359                                    (
3360                                        snapshot.anchor_before(start)..snapshot.anchor_after(end),
3361                                        edit.new_text.clone(),
3362                                    )
3363                                }
3364                                // If the language server does not provide a range, then infer
3365                                // the range based on the syntax tree.
3366                                None => {
3367                                    if position.0 != clipped_position {
3368                                        log::info!("completion out of expected range");
3369                                        return None;
3370                                    }
3371                                    let Range { start, end } = range_for_token
3372                                        .get_or_insert_with(|| {
3373                                            let offset = position.to_offset(&snapshot);
3374                                            let (range, kind) = snapshot.surrounding_word(offset);
3375                                            if kind == Some(CharKind::Word) {
3376                                                range
3377                                            } else {
3378                                                offset..offset
3379                                            }
3380                                        })
3381                                        .clone();
3382                                    let text = lsp_completion
3383                                        .insert_text
3384                                        .as_ref()
3385                                        .unwrap_or(&lsp_completion.label)
3386                                        .clone();
3387                                    (
3388                                        snapshot.anchor_before(start)..snapshot.anchor_after(end),
3389                                        text,
3390                                    )
3391                                }
3392                                Some(lsp::CompletionTextEdit::InsertAndReplace(_)) => {
3393                                    log::info!("unsupported insert/replace completion");
3394                                    return None;
3395                                }
3396                            };
3397
3398                            LineEnding::normalize(&mut new_text);
3399                            let language = language.clone();
3400                            Some(async move {
3401                                let mut label = None;
3402                                if let Some(language) = language {
3403                                    language.process_completion(&mut lsp_completion).await;
3404                                    label = language.label_for_completion(&lsp_completion).await;
3405                                }
3406                                Completion {
3407                                    old_range,
3408                                    new_text,
3409                                    label: label.unwrap_or_else(|| {
3410                                        CodeLabel::plain(
3411                                            lsp_completion.label.clone(),
3412                                            lsp_completion.filter_text.as_deref(),
3413                                        )
3414                                    }),
3415                                    lsp_completion,
3416                                }
3417                            })
3418                        })
3419                });
3420
3421                Ok(futures::future::join_all(completions).await)
3422            })
3423        } else if let Some(project_id) = self.remote_id() {
3424            let rpc = self.client.clone();
3425            let message = proto::GetCompletions {
3426                project_id,
3427                buffer_id,
3428                position: Some(language::proto::serialize_anchor(&anchor)),
3429                version: serialize_version(&source_buffer.version()),
3430            };
3431            cx.spawn_weak(|_, mut cx| async move {
3432                let response = rpc.request(message).await?;
3433
3434                source_buffer_handle
3435                    .update(&mut cx, |buffer, _| {
3436                        buffer.wait_for_version(deserialize_version(response.version))
3437                    })
3438                    .await;
3439
3440                let completions = response.completions.into_iter().map(|completion| {
3441                    language::proto::deserialize_completion(completion, language.clone())
3442                });
3443                futures::future::try_join_all(completions).await
3444            })
3445        } else {
3446            Task::ready(Ok(Default::default()))
3447        }
3448    }
3449
3450    pub fn apply_additional_edits_for_completion(
3451        &self,
3452        buffer_handle: ModelHandle<Buffer>,
3453        completion: Completion,
3454        push_to_history: bool,
3455        cx: &mut ModelContext<Self>,
3456    ) -> Task<Result<Option<Transaction>>> {
3457        let buffer = buffer_handle.read(cx);
3458        let buffer_id = buffer.remote_id();
3459
3460        if self.is_local() {
3461            let lang_server = match self.language_server_for_buffer(buffer, cx) {
3462                Some((_, server)) => server.clone(),
3463                _ => return Task::ready(Ok(Default::default())),
3464            };
3465
3466            cx.spawn(|this, mut cx| async move {
3467                let resolved_completion = lang_server
3468                    .request::<lsp::request::ResolveCompletionItem>(completion.lsp_completion)
3469                    .await?;
3470
3471                if let Some(edits) = resolved_completion.additional_text_edits {
3472                    let edits = this
3473                        .update(&mut cx, |this, cx| {
3474                            this.edits_from_lsp(&buffer_handle, edits, None, cx)
3475                        })
3476                        .await?;
3477
3478                    buffer_handle.update(&mut cx, |buffer, cx| {
3479                        buffer.finalize_last_transaction();
3480                        buffer.start_transaction();
3481
3482                        for (range, text) in edits {
3483                            let primary = &completion.old_range;
3484                            let start_within = primary.start.cmp(&range.start, buffer).is_le()
3485                                && primary.end.cmp(&range.start, buffer).is_ge();
3486                            let end_within = range.start.cmp(&primary.end, buffer).is_le()
3487                                && range.end.cmp(&primary.end, buffer).is_ge();
3488
3489                            //Skip addtional edits which overlap with the primary completion edit
3490                            //https://github.com/zed-industries/zed/pull/1871
3491                            if !start_within && !end_within {
3492                                buffer.edit([(range, text)], None, cx);
3493                            }
3494                        }
3495
3496                        let transaction = if buffer.end_transaction(cx).is_some() {
3497                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
3498                            if !push_to_history {
3499                                buffer.forget_transaction(transaction.id);
3500                            }
3501                            Some(transaction)
3502                        } else {
3503                            None
3504                        };
3505                        Ok(transaction)
3506                    })
3507                } else {
3508                    Ok(None)
3509                }
3510            })
3511        } else if let Some(project_id) = self.remote_id() {
3512            let client = self.client.clone();
3513            cx.spawn(|_, mut cx| async move {
3514                let response = client
3515                    .request(proto::ApplyCompletionAdditionalEdits {
3516                        project_id,
3517                        buffer_id,
3518                        completion: Some(language::proto::serialize_completion(&completion)),
3519                    })
3520                    .await?;
3521
3522                if let Some(transaction) = response.transaction {
3523                    let transaction = language::proto::deserialize_transaction(transaction)?;
3524                    buffer_handle
3525                        .update(&mut cx, |buffer, _| {
3526                            buffer.wait_for_edits(transaction.edit_ids.iter().copied())
3527                        })
3528                        .await;
3529                    if push_to_history {
3530                        buffer_handle.update(&mut cx, |buffer, _| {
3531                            buffer.push_transaction(transaction.clone(), Instant::now());
3532                        });
3533                    }
3534                    Ok(Some(transaction))
3535                } else {
3536                    Ok(None)
3537                }
3538            })
3539        } else {
3540            Task::ready(Err(anyhow!("project does not have a remote id")))
3541        }
3542    }
3543
3544    pub fn code_actions<T: Clone + ToOffset>(
3545        &self,
3546        buffer_handle: &ModelHandle<Buffer>,
3547        range: Range<T>,
3548        cx: &mut ModelContext<Self>,
3549    ) -> Task<Result<Vec<CodeAction>>> {
3550        let buffer_handle = buffer_handle.clone();
3551        let buffer = buffer_handle.read(cx);
3552        let snapshot = buffer.snapshot();
3553        let relevant_diagnostics = snapshot
3554            .diagnostics_in_range::<usize, usize>(range.to_offset(&snapshot), false)
3555            .map(|entry| entry.to_lsp_diagnostic_stub())
3556            .collect();
3557        let buffer_id = buffer.remote_id();
3558        let worktree;
3559        let buffer_abs_path;
3560        if let Some(file) = File::from_dyn(buffer.file()) {
3561            worktree = file.worktree.clone();
3562            buffer_abs_path = file.as_local().map(|f| f.abs_path(cx));
3563        } else {
3564            return Task::ready(Ok(Default::default()));
3565        };
3566        let range = buffer.anchor_before(range.start)..buffer.anchor_before(range.end);
3567
3568        if worktree.read(cx).as_local().is_some() {
3569            let buffer_abs_path = buffer_abs_path.unwrap();
3570            let lang_server = if let Some((_, server)) = self.language_server_for_buffer(buffer, cx)
3571            {
3572                server.clone()
3573            } else {
3574                return Task::ready(Ok(Default::default()));
3575            };
3576
3577            let lsp_range = range_to_lsp(range.to_point_utf16(buffer));
3578            cx.foreground().spawn(async move {
3579                if lang_server.capabilities().code_action_provider.is_none() {
3580                    return Ok(Default::default());
3581                }
3582
3583                Ok(lang_server
3584                    .request::<lsp::request::CodeActionRequest>(lsp::CodeActionParams {
3585                        text_document: lsp::TextDocumentIdentifier::new(
3586                            lsp::Url::from_file_path(buffer_abs_path).unwrap(),
3587                        ),
3588                        range: lsp_range,
3589                        work_done_progress_params: Default::default(),
3590                        partial_result_params: Default::default(),
3591                        context: lsp::CodeActionContext {
3592                            diagnostics: relevant_diagnostics,
3593                            only: Some(vec![
3594                                lsp::CodeActionKind::EMPTY,
3595                                lsp::CodeActionKind::QUICKFIX,
3596                                lsp::CodeActionKind::REFACTOR,
3597                                lsp::CodeActionKind::REFACTOR_EXTRACT,
3598                                lsp::CodeActionKind::SOURCE,
3599                            ]),
3600                        },
3601                    })
3602                    .await?
3603                    .unwrap_or_default()
3604                    .into_iter()
3605                    .filter_map(|entry| {
3606                        if let lsp::CodeActionOrCommand::CodeAction(lsp_action) = entry {
3607                            Some(CodeAction {
3608                                range: range.clone(),
3609                                lsp_action,
3610                            })
3611                        } else {
3612                            None
3613                        }
3614                    })
3615                    .collect())
3616            })
3617        } else if let Some(project_id) = self.remote_id() {
3618            let rpc = self.client.clone();
3619            let version = buffer.version();
3620            cx.spawn_weak(|_, mut cx| async move {
3621                let response = rpc
3622                    .request(proto::GetCodeActions {
3623                        project_id,
3624                        buffer_id,
3625                        start: Some(language::proto::serialize_anchor(&range.start)),
3626                        end: Some(language::proto::serialize_anchor(&range.end)),
3627                        version: serialize_version(&version),
3628                    })
3629                    .await?;
3630
3631                buffer_handle
3632                    .update(&mut cx, |buffer, _| {
3633                        buffer.wait_for_version(deserialize_version(response.version))
3634                    })
3635                    .await;
3636
3637                response
3638                    .actions
3639                    .into_iter()
3640                    .map(language::proto::deserialize_code_action)
3641                    .collect()
3642            })
3643        } else {
3644            Task::ready(Ok(Default::default()))
3645        }
3646    }
3647
3648    pub fn apply_code_action(
3649        &self,
3650        buffer_handle: ModelHandle<Buffer>,
3651        mut action: CodeAction,
3652        push_to_history: bool,
3653        cx: &mut ModelContext<Self>,
3654    ) -> Task<Result<ProjectTransaction>> {
3655        if self.is_local() {
3656            let buffer = buffer_handle.read(cx);
3657            let (lsp_adapter, lang_server) =
3658                if let Some((adapter, server)) = self.language_server_for_buffer(buffer, cx) {
3659                    (adapter.clone(), server.clone())
3660                } else {
3661                    return Task::ready(Ok(Default::default()));
3662                };
3663            let range = action.range.to_point_utf16(buffer);
3664
3665            cx.spawn(|this, mut cx| async move {
3666                if let Some(lsp_range) = action
3667                    .lsp_action
3668                    .data
3669                    .as_mut()
3670                    .and_then(|d| d.get_mut("codeActionParams"))
3671                    .and_then(|d| d.get_mut("range"))
3672                {
3673                    *lsp_range = serde_json::to_value(&range_to_lsp(range)).unwrap();
3674                    action.lsp_action = lang_server
3675                        .request::<lsp::request::CodeActionResolveRequest>(action.lsp_action)
3676                        .await?;
3677                } else {
3678                    let actions = this
3679                        .update(&mut cx, |this, cx| {
3680                            this.code_actions(&buffer_handle, action.range, cx)
3681                        })
3682                        .await?;
3683                    action.lsp_action = actions
3684                        .into_iter()
3685                        .find(|a| a.lsp_action.title == action.lsp_action.title)
3686                        .ok_or_else(|| anyhow!("code action is outdated"))?
3687                        .lsp_action;
3688                }
3689
3690                if let Some(edit) = action.lsp_action.edit {
3691                    if edit.changes.is_some() || edit.document_changes.is_some() {
3692                        return Self::deserialize_workspace_edit(
3693                            this,
3694                            edit,
3695                            push_to_history,
3696                            lsp_adapter.clone(),
3697                            lang_server.clone(),
3698                            &mut cx,
3699                        )
3700                        .await;
3701                    }
3702                }
3703
3704                if let Some(command) = action.lsp_action.command {
3705                    this.update(&mut cx, |this, _| {
3706                        this.last_workspace_edits_by_language_server
3707                            .remove(&lang_server.server_id());
3708                    });
3709                    lang_server
3710                        .request::<lsp::request::ExecuteCommand>(lsp::ExecuteCommandParams {
3711                            command: command.command,
3712                            arguments: command.arguments.unwrap_or_default(),
3713                            ..Default::default()
3714                        })
3715                        .await?;
3716                    return Ok(this.update(&mut cx, |this, _| {
3717                        this.last_workspace_edits_by_language_server
3718                            .remove(&lang_server.server_id())
3719                            .unwrap_or_default()
3720                    }));
3721                }
3722
3723                Ok(ProjectTransaction::default())
3724            })
3725        } else if let Some(project_id) = self.remote_id() {
3726            let client = self.client.clone();
3727            let request = proto::ApplyCodeAction {
3728                project_id,
3729                buffer_id: buffer_handle.read(cx).remote_id(),
3730                action: Some(language::proto::serialize_code_action(&action)),
3731            };
3732            cx.spawn(|this, mut cx| async move {
3733                let response = client
3734                    .request(request)
3735                    .await?
3736                    .transaction
3737                    .ok_or_else(|| anyhow!("missing transaction"))?;
3738                this.update(&mut cx, |this, cx| {
3739                    this.deserialize_project_transaction(response, push_to_history, cx)
3740                })
3741                .await
3742            })
3743        } else {
3744            Task::ready(Err(anyhow!("project does not have a remote id")))
3745        }
3746    }
3747
3748    async fn deserialize_workspace_edit(
3749        this: ModelHandle<Self>,
3750        edit: lsp::WorkspaceEdit,
3751        push_to_history: bool,
3752        lsp_adapter: Arc<CachedLspAdapter>,
3753        language_server: Arc<LanguageServer>,
3754        cx: &mut AsyncAppContext,
3755    ) -> Result<ProjectTransaction> {
3756        let fs = this.read_with(cx, |this, _| this.fs.clone());
3757        let mut operations = Vec::new();
3758        if let Some(document_changes) = edit.document_changes {
3759            match document_changes {
3760                lsp::DocumentChanges::Edits(edits) => {
3761                    operations.extend(edits.into_iter().map(lsp::DocumentChangeOperation::Edit))
3762                }
3763                lsp::DocumentChanges::Operations(ops) => operations = ops,
3764            }
3765        } else if let Some(changes) = edit.changes {
3766            operations.extend(changes.into_iter().map(|(uri, edits)| {
3767                lsp::DocumentChangeOperation::Edit(lsp::TextDocumentEdit {
3768                    text_document: lsp::OptionalVersionedTextDocumentIdentifier {
3769                        uri,
3770                        version: None,
3771                    },
3772                    edits: edits.into_iter().map(lsp::OneOf::Left).collect(),
3773                })
3774            }));
3775        }
3776
3777        let mut project_transaction = ProjectTransaction::default();
3778        for operation in operations {
3779            match operation {
3780                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Create(op)) => {
3781                    let abs_path = op
3782                        .uri
3783                        .to_file_path()
3784                        .map_err(|_| anyhow!("can't convert URI to path"))?;
3785
3786                    if let Some(parent_path) = abs_path.parent() {
3787                        fs.create_dir(parent_path).await?;
3788                    }
3789                    if abs_path.ends_with("/") {
3790                        fs.create_dir(&abs_path).await?;
3791                    } else {
3792                        fs.create_file(&abs_path, op.options.map(Into::into).unwrap_or_default())
3793                            .await?;
3794                    }
3795                }
3796                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Rename(op)) => {
3797                    let source_abs_path = op
3798                        .old_uri
3799                        .to_file_path()
3800                        .map_err(|_| anyhow!("can't convert URI to path"))?;
3801                    let target_abs_path = op
3802                        .new_uri
3803                        .to_file_path()
3804                        .map_err(|_| anyhow!("can't convert URI to path"))?;
3805                    fs.rename(
3806                        &source_abs_path,
3807                        &target_abs_path,
3808                        op.options.map(Into::into).unwrap_or_default(),
3809                    )
3810                    .await?;
3811                }
3812                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Delete(op)) => {
3813                    let abs_path = op
3814                        .uri
3815                        .to_file_path()
3816                        .map_err(|_| anyhow!("can't convert URI to path"))?;
3817                    let options = op.options.map(Into::into).unwrap_or_default();
3818                    if abs_path.ends_with("/") {
3819                        fs.remove_dir(&abs_path, options).await?;
3820                    } else {
3821                        fs.remove_file(&abs_path, options).await?;
3822                    }
3823                }
3824                lsp::DocumentChangeOperation::Edit(op) => {
3825                    let buffer_to_edit = this
3826                        .update(cx, |this, cx| {
3827                            this.open_local_buffer_via_lsp(
3828                                op.text_document.uri,
3829                                language_server.server_id(),
3830                                lsp_adapter.name.clone(),
3831                                cx,
3832                            )
3833                        })
3834                        .await?;
3835
3836                    let edits = this
3837                        .update(cx, |this, cx| {
3838                            let edits = op.edits.into_iter().map(|edit| match edit {
3839                                lsp::OneOf::Left(edit) => edit,
3840                                lsp::OneOf::Right(edit) => edit.text_edit,
3841                            });
3842                            this.edits_from_lsp(
3843                                &buffer_to_edit,
3844                                edits,
3845                                op.text_document.version,
3846                                cx,
3847                            )
3848                        })
3849                        .await?;
3850
3851                    let transaction = buffer_to_edit.update(cx, |buffer, cx| {
3852                        buffer.finalize_last_transaction();
3853                        buffer.start_transaction();
3854                        for (range, text) in edits {
3855                            buffer.edit([(range, text)], None, cx);
3856                        }
3857                        let transaction = if buffer.end_transaction(cx).is_some() {
3858                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
3859                            if !push_to_history {
3860                                buffer.forget_transaction(transaction.id);
3861                            }
3862                            Some(transaction)
3863                        } else {
3864                            None
3865                        };
3866
3867                        transaction
3868                    });
3869                    if let Some(transaction) = transaction {
3870                        project_transaction.0.insert(buffer_to_edit, transaction);
3871                    }
3872                }
3873            }
3874        }
3875
3876        Ok(project_transaction)
3877    }
3878
3879    pub fn prepare_rename<T: ToPointUtf16>(
3880        &self,
3881        buffer: ModelHandle<Buffer>,
3882        position: T,
3883        cx: &mut ModelContext<Self>,
3884    ) -> Task<Result<Option<Range<Anchor>>>> {
3885        let position = position.to_point_utf16(buffer.read(cx));
3886        self.request_lsp(buffer, PrepareRename { position }, cx)
3887    }
3888
3889    pub fn perform_rename<T: ToPointUtf16>(
3890        &self,
3891        buffer: ModelHandle<Buffer>,
3892        position: T,
3893        new_name: String,
3894        push_to_history: bool,
3895        cx: &mut ModelContext<Self>,
3896    ) -> Task<Result<ProjectTransaction>> {
3897        let position = position.to_point_utf16(buffer.read(cx));
3898        self.request_lsp(
3899            buffer,
3900            PerformRename {
3901                position,
3902                new_name,
3903                push_to_history,
3904            },
3905            cx,
3906        )
3907    }
3908
3909    #[allow(clippy::type_complexity)]
3910    pub fn search(
3911        &self,
3912        query: SearchQuery,
3913        cx: &mut ModelContext<Self>,
3914    ) -> Task<Result<HashMap<ModelHandle<Buffer>, Vec<Range<Anchor>>>>> {
3915        if self.is_local() {
3916            let snapshots = self
3917                .visible_worktrees(cx)
3918                .filter_map(|tree| {
3919                    let tree = tree.read(cx).as_local()?;
3920                    Some(tree.snapshot())
3921                })
3922                .collect::<Vec<_>>();
3923
3924            let background = cx.background().clone();
3925            let path_count: usize = snapshots.iter().map(|s| s.visible_file_count()).sum();
3926            if path_count == 0 {
3927                return Task::ready(Ok(Default::default()));
3928            }
3929            let workers = background.num_cpus().min(path_count);
3930            let (matching_paths_tx, mut matching_paths_rx) = smol::channel::bounded(1024);
3931            cx.background()
3932                .spawn({
3933                    let fs = self.fs.clone();
3934                    let background = cx.background().clone();
3935                    let query = query.clone();
3936                    async move {
3937                        let fs = &fs;
3938                        let query = &query;
3939                        let matching_paths_tx = &matching_paths_tx;
3940                        let paths_per_worker = (path_count + workers - 1) / workers;
3941                        let snapshots = &snapshots;
3942                        background
3943                            .scoped(|scope| {
3944                                for worker_ix in 0..workers {
3945                                    let worker_start_ix = worker_ix * paths_per_worker;
3946                                    let worker_end_ix = worker_start_ix + paths_per_worker;
3947                                    scope.spawn(async move {
3948                                        let mut snapshot_start_ix = 0;
3949                                        let mut abs_path = PathBuf::new();
3950                                        for snapshot in snapshots {
3951                                            let snapshot_end_ix =
3952                                                snapshot_start_ix + snapshot.visible_file_count();
3953                                            if worker_end_ix <= snapshot_start_ix {
3954                                                break;
3955                                            } else if worker_start_ix > snapshot_end_ix {
3956                                                snapshot_start_ix = snapshot_end_ix;
3957                                                continue;
3958                                            } else {
3959                                                let start_in_snapshot = worker_start_ix
3960                                                    .saturating_sub(snapshot_start_ix);
3961                                                let end_in_snapshot =
3962                                                    cmp::min(worker_end_ix, snapshot_end_ix)
3963                                                        - snapshot_start_ix;
3964
3965                                                for entry in snapshot
3966                                                    .files(false, start_in_snapshot)
3967                                                    .take(end_in_snapshot - start_in_snapshot)
3968                                                {
3969                                                    if matching_paths_tx.is_closed() {
3970                                                        break;
3971                                                    }
3972
3973                                                    abs_path.clear();
3974                                                    abs_path.push(&snapshot.abs_path());
3975                                                    abs_path.push(&entry.path);
3976                                                    let matches = if let Some(file) =
3977                                                        fs.open_sync(&abs_path).await.log_err()
3978                                                    {
3979                                                        query.detect(file).unwrap_or(false)
3980                                                    } else {
3981                                                        false
3982                                                    };
3983
3984                                                    if matches {
3985                                                        let project_path =
3986                                                            (snapshot.id(), entry.path.clone());
3987                                                        if matching_paths_tx
3988                                                            .send(project_path)
3989                                                            .await
3990                                                            .is_err()
3991                                                        {
3992                                                            break;
3993                                                        }
3994                                                    }
3995                                                }
3996
3997                                                snapshot_start_ix = snapshot_end_ix;
3998                                            }
3999                                        }
4000                                    });
4001                                }
4002                            })
4003                            .await;
4004                    }
4005                })
4006                .detach();
4007
4008            let (buffers_tx, buffers_rx) = smol::channel::bounded(1024);
4009            let open_buffers = self
4010                .opened_buffers
4011                .values()
4012                .filter_map(|b| b.upgrade(cx))
4013                .collect::<HashSet<_>>();
4014            cx.spawn(|this, cx| async move {
4015                for buffer in &open_buffers {
4016                    let snapshot = buffer.read_with(&cx, |buffer, _| buffer.snapshot());
4017                    buffers_tx.send((buffer.clone(), snapshot)).await?;
4018                }
4019
4020                let open_buffers = Rc::new(RefCell::new(open_buffers));
4021                while let Some(project_path) = matching_paths_rx.next().await {
4022                    if buffers_tx.is_closed() {
4023                        break;
4024                    }
4025
4026                    let this = this.clone();
4027                    let open_buffers = open_buffers.clone();
4028                    let buffers_tx = buffers_tx.clone();
4029                    cx.spawn(|mut cx| async move {
4030                        if let Some(buffer) = this
4031                            .update(&mut cx, |this, cx| this.open_buffer(project_path, cx))
4032                            .await
4033                            .log_err()
4034                        {
4035                            if open_buffers.borrow_mut().insert(buffer.clone()) {
4036                                let snapshot = buffer.read_with(&cx, |buffer, _| buffer.snapshot());
4037                                buffers_tx.send((buffer, snapshot)).await?;
4038                            }
4039                        }
4040
4041                        Ok::<_, anyhow::Error>(())
4042                    })
4043                    .detach();
4044                }
4045
4046                Ok::<_, anyhow::Error>(())
4047            })
4048            .detach_and_log_err(cx);
4049
4050            let background = cx.background().clone();
4051            cx.background().spawn(async move {
4052                let query = &query;
4053                let mut matched_buffers = Vec::new();
4054                for _ in 0..workers {
4055                    matched_buffers.push(HashMap::default());
4056                }
4057                background
4058                    .scoped(|scope| {
4059                        for worker_matched_buffers in matched_buffers.iter_mut() {
4060                            let mut buffers_rx = buffers_rx.clone();
4061                            scope.spawn(async move {
4062                                while let Some((buffer, snapshot)) = buffers_rx.next().await {
4063                                    let buffer_matches = query
4064                                        .search(snapshot.as_rope())
4065                                        .await
4066                                        .iter()
4067                                        .map(|range| {
4068                                            snapshot.anchor_before(range.start)
4069                                                ..snapshot.anchor_after(range.end)
4070                                        })
4071                                        .collect::<Vec<_>>();
4072                                    if !buffer_matches.is_empty() {
4073                                        worker_matched_buffers
4074                                            .insert(buffer.clone(), buffer_matches);
4075                                    }
4076                                }
4077                            });
4078                        }
4079                    })
4080                    .await;
4081                Ok(matched_buffers.into_iter().flatten().collect())
4082            })
4083        } else if let Some(project_id) = self.remote_id() {
4084            let request = self.client.request(query.to_proto(project_id));
4085            cx.spawn(|this, mut cx| async move {
4086                let response = request.await?;
4087                let mut result = HashMap::default();
4088                for location in response.locations {
4089                    let target_buffer = this
4090                        .update(&mut cx, |this, cx| {
4091                            this.wait_for_buffer(location.buffer_id, cx)
4092                        })
4093                        .await?;
4094                    let start = location
4095                        .start
4096                        .and_then(deserialize_anchor)
4097                        .ok_or_else(|| anyhow!("missing target start"))?;
4098                    let end = location
4099                        .end
4100                        .and_then(deserialize_anchor)
4101                        .ok_or_else(|| anyhow!("missing target end"))?;
4102                    result
4103                        .entry(target_buffer)
4104                        .or_insert(Vec::new())
4105                        .push(start..end)
4106                }
4107                Ok(result)
4108            })
4109        } else {
4110            Task::ready(Ok(Default::default()))
4111        }
4112    }
4113
4114    fn request_lsp<R: LspCommand>(
4115        &self,
4116        buffer_handle: ModelHandle<Buffer>,
4117        request: R,
4118        cx: &mut ModelContext<Self>,
4119    ) -> Task<Result<R::Response>>
4120    where
4121        <R::LspRequest as lsp::request::Request>::Result: Send,
4122    {
4123        let buffer = buffer_handle.read(cx);
4124        if self.is_local() {
4125            let file = File::from_dyn(buffer.file()).and_then(File::as_local);
4126            if let Some((file, language_server)) = file.zip(
4127                self.language_server_for_buffer(buffer, cx)
4128                    .map(|(_, server)| server.clone()),
4129            ) {
4130                let lsp_params = request.to_lsp(&file.abs_path(cx), cx);
4131                return cx.spawn(|this, cx| async move {
4132                    if !request.check_capabilities(language_server.capabilities()) {
4133                        return Ok(Default::default());
4134                    }
4135
4136                    let response = language_server
4137                        .request::<R::LspRequest>(lsp_params)
4138                        .await
4139                        .context("lsp request failed")?;
4140                    request
4141                        .response_from_lsp(response, this, buffer_handle, cx)
4142                        .await
4143                });
4144            }
4145        } else if let Some(project_id) = self.remote_id() {
4146            let rpc = self.client.clone();
4147            let message = request.to_proto(project_id, buffer);
4148            return cx.spawn(|this, cx| async move {
4149                let response = rpc.request(message).await?;
4150                request
4151                    .response_from_proto(response, this, buffer_handle, cx)
4152                    .await
4153            });
4154        }
4155        Task::ready(Ok(Default::default()))
4156    }
4157
4158    pub fn find_or_create_local_worktree(
4159        &mut self,
4160        abs_path: impl AsRef<Path>,
4161        visible: bool,
4162        cx: &mut ModelContext<Self>,
4163    ) -> Task<Result<(ModelHandle<Worktree>, PathBuf)>> {
4164        let abs_path = abs_path.as_ref();
4165        if let Some((tree, relative_path)) = self.find_local_worktree(abs_path, cx) {
4166            Task::ready(Ok((tree, relative_path)))
4167        } else {
4168            let worktree = self.create_local_worktree(abs_path, visible, cx);
4169            cx.foreground()
4170                .spawn(async move { Ok((worktree.await?, PathBuf::new())) })
4171        }
4172    }
4173
4174    pub fn find_local_worktree(
4175        &self,
4176        abs_path: &Path,
4177        cx: &AppContext,
4178    ) -> Option<(ModelHandle<Worktree>, PathBuf)> {
4179        for tree in &self.worktrees {
4180            if let Some(tree) = tree.upgrade(cx) {
4181                if let Some(relative_path) = tree
4182                    .read(cx)
4183                    .as_local()
4184                    .and_then(|t| abs_path.strip_prefix(t.abs_path()).ok())
4185                {
4186                    return Some((tree.clone(), relative_path.into()));
4187                }
4188            }
4189        }
4190        None
4191    }
4192
4193    pub fn is_shared(&self) -> bool {
4194        match &self.client_state {
4195            Some(ProjectClientState::Local { .. }) => true,
4196            _ => false,
4197        }
4198    }
4199
4200    fn create_local_worktree(
4201        &mut self,
4202        abs_path: impl AsRef<Path>,
4203        visible: bool,
4204        cx: &mut ModelContext<Self>,
4205    ) -> Task<Result<ModelHandle<Worktree>>> {
4206        let fs = self.fs.clone();
4207        let client = self.client.clone();
4208        let next_entry_id = self.next_entry_id.clone();
4209        let path: Arc<Path> = abs_path.as_ref().into();
4210        let task = self
4211            .loading_local_worktrees
4212            .entry(path.clone())
4213            .or_insert_with(|| {
4214                cx.spawn(|project, mut cx| {
4215                    async move {
4216                        let worktree = Worktree::local(
4217                            client.clone(),
4218                            path.clone(),
4219                            visible,
4220                            fs,
4221                            next_entry_id,
4222                            &mut cx,
4223                        )
4224                        .await;
4225                        project.update(&mut cx, |project, _| {
4226                            project.loading_local_worktrees.remove(&path);
4227                        });
4228                        let worktree = worktree?;
4229
4230                        let project_id = project.update(&mut cx, |project, cx| {
4231                            project.add_worktree(&worktree, cx);
4232                            project.remote_id()
4233                        });
4234
4235                        if let Some(project_id) = project_id {
4236                            worktree
4237                                .update(&mut cx, |worktree, cx| {
4238                                    worktree.as_local_mut().unwrap().share(project_id, cx)
4239                                })
4240                                .await
4241                                .log_err();
4242                        }
4243
4244                        Ok(worktree)
4245                    }
4246                    .map_err(Arc::new)
4247                })
4248                .shared()
4249            })
4250            .clone();
4251        cx.foreground().spawn(async move {
4252            match task.await {
4253                Ok(worktree) => Ok(worktree),
4254                Err(err) => Err(anyhow!("{}", err)),
4255            }
4256        })
4257    }
4258
4259    pub fn remove_worktree(&mut self, id_to_remove: WorktreeId, cx: &mut ModelContext<Self>) {
4260        self.worktrees.retain(|worktree| {
4261            if let Some(worktree) = worktree.upgrade(cx) {
4262                let id = worktree.read(cx).id();
4263                if id == id_to_remove {
4264                    cx.emit(Event::WorktreeRemoved(id));
4265                    false
4266                } else {
4267                    true
4268                }
4269            } else {
4270                false
4271            }
4272        });
4273        self.metadata_changed(cx);
4274        cx.notify();
4275    }
4276
4277    fn add_worktree(&mut self, worktree: &ModelHandle<Worktree>, cx: &mut ModelContext<Self>) {
4278        cx.observe(worktree, |_, _, cx| cx.notify()).detach();
4279        if worktree.read(cx).is_local() {
4280            cx.subscribe(worktree, |this, worktree, event, cx| match event {
4281                worktree::Event::UpdatedEntries => this.update_local_worktree_buffers(worktree, cx),
4282                worktree::Event::UpdatedGitRepositories(updated_repos) => {
4283                    this.update_local_worktree_buffers_git_repos(worktree, updated_repos, cx)
4284                }
4285            })
4286            .detach();
4287        }
4288
4289        let push_strong_handle = {
4290            let worktree = worktree.read(cx);
4291            self.is_shared() || worktree.is_visible() || worktree.is_remote()
4292        };
4293        if push_strong_handle {
4294            self.worktrees
4295                .push(WorktreeHandle::Strong(worktree.clone()));
4296        } else {
4297            self.worktrees
4298                .push(WorktreeHandle::Weak(worktree.downgrade()));
4299        }
4300
4301        self.metadata_changed(cx);
4302        cx.observe_release(worktree, |this, worktree, cx| {
4303            this.remove_worktree(worktree.id(), cx);
4304            cx.notify();
4305        })
4306        .detach();
4307
4308        cx.emit(Event::WorktreeAdded);
4309        cx.notify();
4310    }
4311
4312    fn update_local_worktree_buffers(
4313        &mut self,
4314        worktree_handle: ModelHandle<Worktree>,
4315        cx: &mut ModelContext<Self>,
4316    ) {
4317        let snapshot = worktree_handle.read(cx).snapshot();
4318        let mut buffers_to_delete = Vec::new();
4319        let mut renamed_buffers = Vec::new();
4320        for (buffer_id, buffer) in &self.opened_buffers {
4321            if let Some(buffer) = buffer.upgrade(cx) {
4322                buffer.update(cx, |buffer, cx| {
4323                    if let Some(old_file) = File::from_dyn(buffer.file()) {
4324                        if old_file.worktree != worktree_handle {
4325                            return;
4326                        }
4327
4328                        let new_file = if let Some(entry) = snapshot.entry_for_id(old_file.entry_id)
4329                        {
4330                            File {
4331                                is_local: true,
4332                                entry_id: entry.id,
4333                                mtime: entry.mtime,
4334                                path: entry.path.clone(),
4335                                worktree: worktree_handle.clone(),
4336                                is_deleted: false,
4337                            }
4338                        } else if let Some(entry) =
4339                            snapshot.entry_for_path(old_file.path().as_ref())
4340                        {
4341                            File {
4342                                is_local: true,
4343                                entry_id: entry.id,
4344                                mtime: entry.mtime,
4345                                path: entry.path.clone(),
4346                                worktree: worktree_handle.clone(),
4347                                is_deleted: false,
4348                            }
4349                        } else {
4350                            File {
4351                                is_local: true,
4352                                entry_id: old_file.entry_id,
4353                                path: old_file.path().clone(),
4354                                mtime: old_file.mtime(),
4355                                worktree: worktree_handle.clone(),
4356                                is_deleted: true,
4357                            }
4358                        };
4359
4360                        let old_path = old_file.abs_path(cx);
4361                        if new_file.abs_path(cx) != old_path {
4362                            renamed_buffers.push((cx.handle(), old_path));
4363                        }
4364
4365                        if let Some(project_id) = self.remote_id() {
4366                            self.client
4367                                .send(proto::UpdateBufferFile {
4368                                    project_id,
4369                                    buffer_id: *buffer_id as u64,
4370                                    file: Some(new_file.to_proto()),
4371                                })
4372                                .log_err();
4373                        }
4374                        buffer.file_updated(Arc::new(new_file), cx).detach();
4375                    }
4376                });
4377            } else {
4378                buffers_to_delete.push(*buffer_id);
4379            }
4380        }
4381
4382        for buffer_id in buffers_to_delete {
4383            self.opened_buffers.remove(&buffer_id);
4384        }
4385
4386        for (buffer, old_path) in renamed_buffers {
4387            self.unregister_buffer_from_language_server(&buffer, old_path, cx);
4388            self.assign_language_to_buffer(&buffer, cx);
4389            self.register_buffer_with_language_server(&buffer, cx);
4390        }
4391    }
4392
4393    fn update_local_worktree_buffers_git_repos(
4394        &mut self,
4395        worktree: ModelHandle<Worktree>,
4396        repos: &[GitRepositoryEntry],
4397        cx: &mut ModelContext<Self>,
4398    ) {
4399        for (_, buffer) in &self.opened_buffers {
4400            if let Some(buffer) = buffer.upgrade(cx) {
4401                let file = match File::from_dyn(buffer.read(cx).file()) {
4402                    Some(file) => file,
4403                    None => continue,
4404                };
4405                if file.worktree != worktree {
4406                    continue;
4407                }
4408
4409                let path = file.path().clone();
4410
4411                let repo = match repos.iter().find(|repo| repo.manages(&path)) {
4412                    Some(repo) => repo.clone(),
4413                    None => return,
4414                };
4415
4416                let relative_repo = match path.strip_prefix(repo.content_path) {
4417                    Ok(relative_repo) => relative_repo.to_owned(),
4418                    Err(_) => return,
4419                };
4420
4421                let remote_id = self.remote_id();
4422                let client = self.client.clone();
4423
4424                cx.spawn(|_, mut cx| async move {
4425                    let diff_base = cx
4426                        .background()
4427                        .spawn(async move { repo.repo.lock().load_index_text(&relative_repo) })
4428                        .await;
4429
4430                    let buffer_id = buffer.update(&mut cx, |buffer, cx| {
4431                        buffer.set_diff_base(diff_base.clone(), cx);
4432                        buffer.remote_id()
4433                    });
4434
4435                    if let Some(project_id) = remote_id {
4436                        client
4437                            .send(proto::UpdateDiffBase {
4438                                project_id,
4439                                buffer_id: buffer_id as u64,
4440                                diff_base,
4441                            })
4442                            .log_err();
4443                    }
4444                })
4445                .detach();
4446            }
4447        }
4448    }
4449
4450    pub fn set_active_path(&mut self, entry: Option<ProjectPath>, cx: &mut ModelContext<Self>) {
4451        let new_active_entry = entry.and_then(|project_path| {
4452            let worktree = self.worktree_for_id(project_path.worktree_id, cx)?;
4453            let entry = worktree.read(cx).entry_for_path(project_path.path)?;
4454            Some(entry.id)
4455        });
4456        if new_active_entry != self.active_entry {
4457            self.active_entry = new_active_entry;
4458            cx.emit(Event::ActiveEntryChanged(new_active_entry));
4459        }
4460    }
4461
4462    pub fn language_servers_running_disk_based_diagnostics(
4463        &self,
4464    ) -> impl Iterator<Item = usize> + '_ {
4465        self.language_server_statuses
4466            .iter()
4467            .filter_map(|(id, status)| {
4468                if status.has_pending_diagnostic_updates {
4469                    Some(*id)
4470                } else {
4471                    None
4472                }
4473            })
4474    }
4475
4476    pub fn diagnostic_summary(&self, cx: &AppContext) -> DiagnosticSummary {
4477        let mut summary = DiagnosticSummary::default();
4478        for (_, path_summary) in self.diagnostic_summaries(cx) {
4479            summary.error_count += path_summary.error_count;
4480            summary.warning_count += path_summary.warning_count;
4481        }
4482        summary
4483    }
4484
4485    pub fn diagnostic_summaries<'a>(
4486        &'a self,
4487        cx: &'a AppContext,
4488    ) -> impl Iterator<Item = (ProjectPath, DiagnosticSummary)> + 'a {
4489        self.visible_worktrees(cx).flat_map(move |worktree| {
4490            let worktree = worktree.read(cx);
4491            let worktree_id = worktree.id();
4492            worktree
4493                .diagnostic_summaries()
4494                .map(move |(path, summary)| (ProjectPath { worktree_id, path }, summary))
4495        })
4496    }
4497
4498    pub fn disk_based_diagnostics_started(
4499        &mut self,
4500        language_server_id: usize,
4501        cx: &mut ModelContext<Self>,
4502    ) {
4503        cx.emit(Event::DiskBasedDiagnosticsStarted { language_server_id });
4504    }
4505
4506    pub fn disk_based_diagnostics_finished(
4507        &mut self,
4508        language_server_id: usize,
4509        cx: &mut ModelContext<Self>,
4510    ) {
4511        cx.emit(Event::DiskBasedDiagnosticsFinished { language_server_id });
4512    }
4513
4514    pub fn active_entry(&self) -> Option<ProjectEntryId> {
4515        self.active_entry
4516    }
4517
4518    pub fn entry_for_path(&self, path: &ProjectPath, cx: &AppContext) -> Option<Entry> {
4519        self.worktree_for_id(path.worktree_id, cx)?
4520            .read(cx)
4521            .entry_for_path(&path.path)
4522            .cloned()
4523    }
4524
4525    pub fn path_for_entry(&self, entry_id: ProjectEntryId, cx: &AppContext) -> Option<ProjectPath> {
4526        let worktree = self.worktree_for_entry(entry_id, cx)?;
4527        let worktree = worktree.read(cx);
4528        let worktree_id = worktree.id();
4529        let path = worktree.entry_for_id(entry_id)?.path.clone();
4530        Some(ProjectPath { worktree_id, path })
4531    }
4532
4533    // RPC message handlers
4534
4535    async fn handle_unshare_project(
4536        this: ModelHandle<Self>,
4537        _: TypedEnvelope<proto::UnshareProject>,
4538        _: Arc<Client>,
4539        mut cx: AsyncAppContext,
4540    ) -> Result<()> {
4541        this.update(&mut cx, |this, cx| {
4542            if this.is_local() {
4543                this.unshare(cx)?;
4544            } else {
4545                this.disconnected_from_host(cx);
4546            }
4547            Ok(())
4548        })
4549    }
4550
4551    async fn handle_add_collaborator(
4552        this: ModelHandle<Self>,
4553        mut envelope: TypedEnvelope<proto::AddProjectCollaborator>,
4554        _: Arc<Client>,
4555        mut cx: AsyncAppContext,
4556    ) -> Result<()> {
4557        let collaborator = envelope
4558            .payload
4559            .collaborator
4560            .take()
4561            .ok_or_else(|| anyhow!("empty collaborator"))?;
4562
4563        let collaborator = Collaborator::from_proto(collaborator);
4564        this.update(&mut cx, |this, cx| {
4565            this.collaborators
4566                .insert(collaborator.peer_id, collaborator);
4567            cx.notify();
4568        });
4569
4570        Ok(())
4571    }
4572
4573    async fn handle_remove_collaborator(
4574        this: ModelHandle<Self>,
4575        envelope: TypedEnvelope<proto::RemoveProjectCollaborator>,
4576        _: Arc<Client>,
4577        mut cx: AsyncAppContext,
4578    ) -> Result<()> {
4579        this.update(&mut cx, |this, cx| {
4580            let peer_id = PeerId(envelope.payload.peer_id);
4581            let replica_id = this
4582                .collaborators
4583                .remove(&peer_id)
4584                .ok_or_else(|| anyhow!("unknown peer {:?}", peer_id))?
4585                .replica_id;
4586            for buffer in this.opened_buffers.values() {
4587                if let Some(buffer) = buffer.upgrade(cx) {
4588                    buffer.update(cx, |buffer, cx| buffer.remove_peer(replica_id, cx));
4589                }
4590            }
4591            this.shared_buffers.remove(&peer_id);
4592
4593            cx.emit(Event::CollaboratorLeft(peer_id));
4594            cx.notify();
4595            Ok(())
4596        })
4597    }
4598
4599    async fn handle_update_project(
4600        this: ModelHandle<Self>,
4601        envelope: TypedEnvelope<proto::UpdateProject>,
4602        client: Arc<Client>,
4603        mut cx: AsyncAppContext,
4604    ) -> Result<()> {
4605        this.update(&mut cx, |this, cx| {
4606            let replica_id = this.replica_id();
4607            let remote_id = this.remote_id().ok_or_else(|| anyhow!("invalid project"))?;
4608
4609            let mut old_worktrees_by_id = this
4610                .worktrees
4611                .drain(..)
4612                .filter_map(|worktree| {
4613                    let worktree = worktree.upgrade(cx)?;
4614                    Some((worktree.read(cx).id(), worktree))
4615                })
4616                .collect::<HashMap<_, _>>();
4617
4618            for worktree in envelope.payload.worktrees {
4619                if let Some(old_worktree) =
4620                    old_worktrees_by_id.remove(&WorktreeId::from_proto(worktree.id))
4621                {
4622                    this.worktrees.push(WorktreeHandle::Strong(old_worktree));
4623                } else {
4624                    let worktree =
4625                        Worktree::remote(remote_id, replica_id, worktree, client.clone(), cx);
4626                    this.add_worktree(&worktree, cx);
4627                }
4628            }
4629
4630            this.metadata_changed(cx);
4631            for (id, _) in old_worktrees_by_id {
4632                cx.emit(Event::WorktreeRemoved(id));
4633            }
4634
4635            Ok(())
4636        })
4637    }
4638
4639    async fn handle_update_worktree(
4640        this: ModelHandle<Self>,
4641        envelope: TypedEnvelope<proto::UpdateWorktree>,
4642        _: Arc<Client>,
4643        mut cx: AsyncAppContext,
4644    ) -> Result<()> {
4645        this.update(&mut cx, |this, cx| {
4646            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
4647            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
4648                worktree.update(cx, |worktree, _| {
4649                    let worktree = worktree.as_remote_mut().unwrap();
4650                    worktree.update_from_remote(envelope.payload);
4651                });
4652            }
4653            Ok(())
4654        })
4655    }
4656
4657    async fn handle_create_project_entry(
4658        this: ModelHandle<Self>,
4659        envelope: TypedEnvelope<proto::CreateProjectEntry>,
4660        _: Arc<Client>,
4661        mut cx: AsyncAppContext,
4662    ) -> Result<proto::ProjectEntryResponse> {
4663        let worktree = this.update(&mut cx, |this, cx| {
4664            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
4665            this.worktree_for_id(worktree_id, cx)
4666                .ok_or_else(|| anyhow!("worktree not found"))
4667        })?;
4668        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
4669        let entry = worktree
4670            .update(&mut cx, |worktree, cx| {
4671                let worktree = worktree.as_local_mut().unwrap();
4672                let path = PathBuf::from(OsString::from_vec(envelope.payload.path));
4673                worktree.create_entry(path, envelope.payload.is_directory, cx)
4674            })
4675            .await?;
4676        Ok(proto::ProjectEntryResponse {
4677            entry: Some((&entry).into()),
4678            worktree_scan_id: worktree_scan_id as u64,
4679        })
4680    }
4681
4682    async fn handle_rename_project_entry(
4683        this: ModelHandle<Self>,
4684        envelope: TypedEnvelope<proto::RenameProjectEntry>,
4685        _: Arc<Client>,
4686        mut cx: AsyncAppContext,
4687    ) -> Result<proto::ProjectEntryResponse> {
4688        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
4689        let worktree = this.read_with(&cx, |this, cx| {
4690            this.worktree_for_entry(entry_id, cx)
4691                .ok_or_else(|| anyhow!("worktree not found"))
4692        })?;
4693        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
4694        let entry = worktree
4695            .update(&mut cx, |worktree, cx| {
4696                let new_path = PathBuf::from(OsString::from_vec(envelope.payload.new_path));
4697                worktree
4698                    .as_local_mut()
4699                    .unwrap()
4700                    .rename_entry(entry_id, new_path, cx)
4701                    .ok_or_else(|| anyhow!("invalid entry"))
4702            })?
4703            .await?;
4704        Ok(proto::ProjectEntryResponse {
4705            entry: Some((&entry).into()),
4706            worktree_scan_id: worktree_scan_id as u64,
4707        })
4708    }
4709
4710    async fn handle_copy_project_entry(
4711        this: ModelHandle<Self>,
4712        envelope: TypedEnvelope<proto::CopyProjectEntry>,
4713        _: Arc<Client>,
4714        mut cx: AsyncAppContext,
4715    ) -> Result<proto::ProjectEntryResponse> {
4716        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
4717        let worktree = this.read_with(&cx, |this, cx| {
4718            this.worktree_for_entry(entry_id, cx)
4719                .ok_or_else(|| anyhow!("worktree not found"))
4720        })?;
4721        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
4722        let entry = worktree
4723            .update(&mut cx, |worktree, cx| {
4724                let new_path = PathBuf::from(OsString::from_vec(envelope.payload.new_path));
4725                worktree
4726                    .as_local_mut()
4727                    .unwrap()
4728                    .copy_entry(entry_id, new_path, cx)
4729                    .ok_or_else(|| anyhow!("invalid entry"))
4730            })?
4731            .await?;
4732        Ok(proto::ProjectEntryResponse {
4733            entry: Some((&entry).into()),
4734            worktree_scan_id: worktree_scan_id as u64,
4735        })
4736    }
4737
4738    async fn handle_delete_project_entry(
4739        this: ModelHandle<Self>,
4740        envelope: TypedEnvelope<proto::DeleteProjectEntry>,
4741        _: Arc<Client>,
4742        mut cx: AsyncAppContext,
4743    ) -> Result<proto::ProjectEntryResponse> {
4744        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
4745        let worktree = this.read_with(&cx, |this, cx| {
4746            this.worktree_for_entry(entry_id, cx)
4747                .ok_or_else(|| anyhow!("worktree not found"))
4748        })?;
4749        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
4750        worktree
4751            .update(&mut cx, |worktree, cx| {
4752                worktree
4753                    .as_local_mut()
4754                    .unwrap()
4755                    .delete_entry(entry_id, cx)
4756                    .ok_or_else(|| anyhow!("invalid entry"))
4757            })?
4758            .await?;
4759        Ok(proto::ProjectEntryResponse {
4760            entry: None,
4761            worktree_scan_id: worktree_scan_id as u64,
4762        })
4763    }
4764
4765    async fn handle_update_diagnostic_summary(
4766        this: ModelHandle<Self>,
4767        envelope: TypedEnvelope<proto::UpdateDiagnosticSummary>,
4768        _: Arc<Client>,
4769        mut cx: AsyncAppContext,
4770    ) -> Result<()> {
4771        this.update(&mut cx, |this, cx| {
4772            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
4773            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
4774                if let Some(summary) = envelope.payload.summary {
4775                    let project_path = ProjectPath {
4776                        worktree_id,
4777                        path: Path::new(&summary.path).into(),
4778                    };
4779                    worktree.update(cx, |worktree, _| {
4780                        worktree
4781                            .as_remote_mut()
4782                            .unwrap()
4783                            .update_diagnostic_summary(project_path.path.clone(), &summary);
4784                    });
4785                    cx.emit(Event::DiagnosticsUpdated {
4786                        language_server_id: summary.language_server_id as usize,
4787                        path: project_path,
4788                    });
4789                }
4790            }
4791            Ok(())
4792        })
4793    }
4794
4795    async fn handle_start_language_server(
4796        this: ModelHandle<Self>,
4797        envelope: TypedEnvelope<proto::StartLanguageServer>,
4798        _: Arc<Client>,
4799        mut cx: AsyncAppContext,
4800    ) -> Result<()> {
4801        let server = envelope
4802            .payload
4803            .server
4804            .ok_or_else(|| anyhow!("invalid server"))?;
4805        this.update(&mut cx, |this, cx| {
4806            this.language_server_statuses.insert(
4807                server.id as usize,
4808                LanguageServerStatus {
4809                    name: server.name,
4810                    pending_work: Default::default(),
4811                    has_pending_diagnostic_updates: false,
4812                    progress_tokens: Default::default(),
4813                },
4814            );
4815            cx.notify();
4816        });
4817        Ok(())
4818    }
4819
4820    async fn handle_update_language_server(
4821        this: ModelHandle<Self>,
4822        envelope: TypedEnvelope<proto::UpdateLanguageServer>,
4823        _: Arc<Client>,
4824        mut cx: AsyncAppContext,
4825    ) -> Result<()> {
4826        let language_server_id = envelope.payload.language_server_id as usize;
4827        match envelope
4828            .payload
4829            .variant
4830            .ok_or_else(|| anyhow!("invalid variant"))?
4831        {
4832            proto::update_language_server::Variant::WorkStart(payload) => {
4833                this.update(&mut cx, |this, cx| {
4834                    this.on_lsp_work_start(
4835                        language_server_id,
4836                        payload.token,
4837                        LanguageServerProgress {
4838                            message: payload.message,
4839                            percentage: payload.percentage.map(|p| p as usize),
4840                            last_update_at: Instant::now(),
4841                        },
4842                        cx,
4843                    );
4844                })
4845            }
4846            proto::update_language_server::Variant::WorkProgress(payload) => {
4847                this.update(&mut cx, |this, cx| {
4848                    this.on_lsp_work_progress(
4849                        language_server_id,
4850                        payload.token,
4851                        LanguageServerProgress {
4852                            message: payload.message,
4853                            percentage: payload.percentage.map(|p| p as usize),
4854                            last_update_at: Instant::now(),
4855                        },
4856                        cx,
4857                    );
4858                })
4859            }
4860            proto::update_language_server::Variant::WorkEnd(payload) => {
4861                this.update(&mut cx, |this, cx| {
4862                    this.on_lsp_work_end(language_server_id, payload.token, cx);
4863                })
4864            }
4865            proto::update_language_server::Variant::DiskBasedDiagnosticsUpdating(_) => {
4866                this.update(&mut cx, |this, cx| {
4867                    this.disk_based_diagnostics_started(language_server_id, cx);
4868                })
4869            }
4870            proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(_) => {
4871                this.update(&mut cx, |this, cx| {
4872                    this.disk_based_diagnostics_finished(language_server_id, cx)
4873                });
4874            }
4875        }
4876
4877        Ok(())
4878    }
4879
4880    async fn handle_update_buffer(
4881        this: ModelHandle<Self>,
4882        envelope: TypedEnvelope<proto::UpdateBuffer>,
4883        _: Arc<Client>,
4884        mut cx: AsyncAppContext,
4885    ) -> Result<()> {
4886        this.update(&mut cx, |this, cx| {
4887            let payload = envelope.payload.clone();
4888            let buffer_id = payload.buffer_id;
4889            let ops = payload
4890                .operations
4891                .into_iter()
4892                .map(language::proto::deserialize_operation)
4893                .collect::<Result<Vec<_>, _>>()?;
4894            let is_remote = this.is_remote();
4895            match this.opened_buffers.entry(buffer_id) {
4896                hash_map::Entry::Occupied(mut e) => match e.get_mut() {
4897                    OpenBuffer::Strong(buffer) => {
4898                        buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx))?;
4899                    }
4900                    OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
4901                    OpenBuffer::Weak(_) => {}
4902                },
4903                hash_map::Entry::Vacant(e) => {
4904                    assert!(
4905                        is_remote,
4906                        "received buffer update from {:?}",
4907                        envelope.original_sender_id
4908                    );
4909                    e.insert(OpenBuffer::Operations(ops));
4910                }
4911            }
4912            Ok(())
4913        })
4914    }
4915
4916    async fn handle_create_buffer_for_peer(
4917        this: ModelHandle<Self>,
4918        envelope: TypedEnvelope<proto::CreateBufferForPeer>,
4919        _: Arc<Client>,
4920        mut cx: AsyncAppContext,
4921    ) -> Result<()> {
4922        this.update(&mut cx, |this, cx| {
4923            match envelope
4924                .payload
4925                .variant
4926                .ok_or_else(|| anyhow!("missing variant"))?
4927            {
4928                proto::create_buffer_for_peer::Variant::State(mut state) => {
4929                    let mut buffer_file = None;
4930                    if let Some(file) = state.file.take() {
4931                        let worktree_id = WorktreeId::from_proto(file.worktree_id);
4932                        let worktree = this.worktree_for_id(worktree_id, cx).ok_or_else(|| {
4933                            anyhow!("no worktree found for id {}", file.worktree_id)
4934                        })?;
4935                        buffer_file = Some(Arc::new(File::from_proto(file, worktree.clone(), cx)?)
4936                            as Arc<dyn language::File>);
4937                    }
4938
4939                    let buffer_id = state.id;
4940                    let buffer = cx.add_model(|_| {
4941                        Buffer::from_proto(this.replica_id(), state, buffer_file).unwrap()
4942                    });
4943                    this.incomplete_buffers.insert(buffer_id, buffer);
4944                }
4945                proto::create_buffer_for_peer::Variant::Chunk(chunk) => {
4946                    let buffer = this
4947                        .incomplete_buffers
4948                        .get(&chunk.buffer_id)
4949                        .ok_or_else(|| {
4950                            anyhow!(
4951                                "received chunk for buffer {} without initial state",
4952                                chunk.buffer_id
4953                            )
4954                        })?
4955                        .clone();
4956                    let operations = chunk
4957                        .operations
4958                        .into_iter()
4959                        .map(language::proto::deserialize_operation)
4960                        .collect::<Result<Vec<_>>>()?;
4961                    buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx))?;
4962
4963                    if chunk.is_last {
4964                        this.incomplete_buffers.remove(&chunk.buffer_id);
4965                        this.register_buffer(&buffer, cx)?;
4966                    }
4967                }
4968            }
4969
4970            Ok(())
4971        })
4972    }
4973
4974    async fn handle_update_diff_base(
4975        this: ModelHandle<Self>,
4976        envelope: TypedEnvelope<proto::UpdateDiffBase>,
4977        _: Arc<Client>,
4978        mut cx: AsyncAppContext,
4979    ) -> Result<()> {
4980        this.update(&mut cx, |this, cx| {
4981            let buffer_id = envelope.payload.buffer_id;
4982            let diff_base = envelope.payload.diff_base;
4983            let buffer = this
4984                .opened_buffers
4985                .get_mut(&buffer_id)
4986                .and_then(|b| b.upgrade(cx))
4987                .ok_or_else(|| anyhow!("No such buffer {}", buffer_id))?;
4988
4989            buffer.update(cx, |buffer, cx| buffer.set_diff_base(diff_base, cx));
4990
4991            Ok(())
4992        })
4993    }
4994
4995    async fn handle_update_buffer_file(
4996        this: ModelHandle<Self>,
4997        envelope: TypedEnvelope<proto::UpdateBufferFile>,
4998        _: Arc<Client>,
4999        mut cx: AsyncAppContext,
5000    ) -> Result<()> {
5001        this.update(&mut cx, |this, cx| {
5002            let payload = envelope.payload.clone();
5003            let buffer_id = payload.buffer_id;
5004            let file = payload.file.ok_or_else(|| anyhow!("invalid file"))?;
5005            let worktree = this
5006                .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
5007                .ok_or_else(|| anyhow!("no such worktree"))?;
5008            let file = File::from_proto(file, worktree, cx)?;
5009            let buffer = this
5010                .opened_buffers
5011                .get_mut(&buffer_id)
5012                .and_then(|b| b.upgrade(cx))
5013                .ok_or_else(|| anyhow!("no such buffer"))?;
5014            buffer.update(cx, |buffer, cx| {
5015                buffer.file_updated(Arc::new(file), cx).detach();
5016            });
5017            this.assign_language_to_buffer(&buffer, cx);
5018            Ok(())
5019        })
5020    }
5021
5022    async fn handle_save_buffer(
5023        this: ModelHandle<Self>,
5024        envelope: TypedEnvelope<proto::SaveBuffer>,
5025        _: Arc<Client>,
5026        mut cx: AsyncAppContext,
5027    ) -> Result<proto::BufferSaved> {
5028        let buffer_id = envelope.payload.buffer_id;
5029        let requested_version = deserialize_version(envelope.payload.version);
5030
5031        let (project_id, buffer) = this.update(&mut cx, |this, cx| {
5032            let project_id = this.remote_id().ok_or_else(|| anyhow!("not connected"))?;
5033            let buffer = this
5034                .opened_buffers
5035                .get(&buffer_id)
5036                .and_then(|buffer| buffer.upgrade(cx))
5037                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?;
5038            Ok::<_, anyhow::Error>((project_id, buffer))
5039        })?;
5040        buffer
5041            .update(&mut cx, |buffer, _| {
5042                buffer.wait_for_version(requested_version)
5043            })
5044            .await;
5045
5046        let (saved_version, fingerprint, mtime) =
5047            buffer.update(&mut cx, |buffer, cx| buffer.save(cx)).await?;
5048        Ok(proto::BufferSaved {
5049            project_id,
5050            buffer_id,
5051            version: serialize_version(&saved_version),
5052            mtime: Some(mtime.into()),
5053            fingerprint,
5054        })
5055    }
5056
5057    async fn handle_reload_buffers(
5058        this: ModelHandle<Self>,
5059        envelope: TypedEnvelope<proto::ReloadBuffers>,
5060        _: Arc<Client>,
5061        mut cx: AsyncAppContext,
5062    ) -> Result<proto::ReloadBuffersResponse> {
5063        let sender_id = envelope.original_sender_id()?;
5064        let reload = this.update(&mut cx, |this, cx| {
5065            let mut buffers = HashSet::default();
5066            for buffer_id in &envelope.payload.buffer_ids {
5067                buffers.insert(
5068                    this.opened_buffers
5069                        .get(buffer_id)
5070                        .and_then(|buffer| buffer.upgrade(cx))
5071                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
5072                );
5073            }
5074            Ok::<_, anyhow::Error>(this.reload_buffers(buffers, false, cx))
5075        })?;
5076
5077        let project_transaction = reload.await?;
5078        let project_transaction = this.update(&mut cx, |this, cx| {
5079            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5080        });
5081        Ok(proto::ReloadBuffersResponse {
5082            transaction: Some(project_transaction),
5083        })
5084    }
5085
5086    async fn handle_format_buffers(
5087        this: ModelHandle<Self>,
5088        envelope: TypedEnvelope<proto::FormatBuffers>,
5089        _: Arc<Client>,
5090        mut cx: AsyncAppContext,
5091    ) -> Result<proto::FormatBuffersResponse> {
5092        let sender_id = envelope.original_sender_id()?;
5093        let format = this.update(&mut cx, |this, cx| {
5094            let mut buffers = HashSet::default();
5095            for buffer_id in &envelope.payload.buffer_ids {
5096                buffers.insert(
5097                    this.opened_buffers
5098                        .get(buffer_id)
5099                        .and_then(|buffer| buffer.upgrade(cx))
5100                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
5101                );
5102            }
5103            let trigger = FormatTrigger::from_proto(envelope.payload.trigger);
5104            Ok::<_, anyhow::Error>(this.format(buffers, false, trigger, cx))
5105        })?;
5106
5107        let project_transaction = format.await?;
5108        let project_transaction = this.update(&mut cx, |this, cx| {
5109            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5110        });
5111        Ok(proto::FormatBuffersResponse {
5112            transaction: Some(project_transaction),
5113        })
5114    }
5115
5116    async fn handle_get_completions(
5117        this: ModelHandle<Self>,
5118        envelope: TypedEnvelope<proto::GetCompletions>,
5119        _: Arc<Client>,
5120        mut cx: AsyncAppContext,
5121    ) -> Result<proto::GetCompletionsResponse> {
5122        let buffer = this.read_with(&cx, |this, cx| {
5123            this.opened_buffers
5124                .get(&envelope.payload.buffer_id)
5125                .and_then(|buffer| buffer.upgrade(cx))
5126                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))
5127        })?;
5128
5129        let position = envelope
5130            .payload
5131            .position
5132            .and_then(language::proto::deserialize_anchor)
5133            .map(|p| {
5134                buffer.read_with(&cx, |buffer, _| {
5135                    buffer.clip_point_utf16(Unclipped(p.to_point_utf16(buffer)), Bias::Left)
5136                })
5137            })
5138            .ok_or_else(|| anyhow!("invalid position"))?;
5139
5140        let version = deserialize_version(envelope.payload.version);
5141        buffer
5142            .update(&mut cx, |buffer, _| buffer.wait_for_version(version))
5143            .await;
5144        let version = buffer.read_with(&cx, |buffer, _| buffer.version());
5145
5146        let completions = this
5147            .update(&mut cx, |this, cx| this.completions(&buffer, position, cx))
5148            .await?;
5149
5150        Ok(proto::GetCompletionsResponse {
5151            completions: completions
5152                .iter()
5153                .map(language::proto::serialize_completion)
5154                .collect(),
5155            version: serialize_version(&version),
5156        })
5157    }
5158
5159    async fn handle_apply_additional_edits_for_completion(
5160        this: ModelHandle<Self>,
5161        envelope: TypedEnvelope<proto::ApplyCompletionAdditionalEdits>,
5162        _: Arc<Client>,
5163        mut cx: AsyncAppContext,
5164    ) -> Result<proto::ApplyCompletionAdditionalEditsResponse> {
5165        let (buffer, completion) = this.update(&mut cx, |this, cx| {
5166            let buffer = this
5167                .opened_buffers
5168                .get(&envelope.payload.buffer_id)
5169                .and_then(|buffer| buffer.upgrade(cx))
5170                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
5171            let language = buffer.read(cx).language();
5172            let completion = language::proto::deserialize_completion(
5173                envelope
5174                    .payload
5175                    .completion
5176                    .ok_or_else(|| anyhow!("invalid completion"))?,
5177                language.cloned(),
5178            );
5179            Ok::<_, anyhow::Error>((buffer, completion))
5180        })?;
5181
5182        let completion = completion.await?;
5183
5184        let apply_additional_edits = this.update(&mut cx, |this, cx| {
5185            this.apply_additional_edits_for_completion(buffer, completion, false, cx)
5186        });
5187
5188        Ok(proto::ApplyCompletionAdditionalEditsResponse {
5189            transaction: apply_additional_edits
5190                .await?
5191                .as_ref()
5192                .map(language::proto::serialize_transaction),
5193        })
5194    }
5195
5196    async fn handle_get_code_actions(
5197        this: ModelHandle<Self>,
5198        envelope: TypedEnvelope<proto::GetCodeActions>,
5199        _: Arc<Client>,
5200        mut cx: AsyncAppContext,
5201    ) -> Result<proto::GetCodeActionsResponse> {
5202        let start = envelope
5203            .payload
5204            .start
5205            .and_then(language::proto::deserialize_anchor)
5206            .ok_or_else(|| anyhow!("invalid start"))?;
5207        let end = envelope
5208            .payload
5209            .end
5210            .and_then(language::proto::deserialize_anchor)
5211            .ok_or_else(|| anyhow!("invalid end"))?;
5212        let buffer = this.update(&mut cx, |this, cx| {
5213            this.opened_buffers
5214                .get(&envelope.payload.buffer_id)
5215                .and_then(|buffer| buffer.upgrade(cx))
5216                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))
5217        })?;
5218        buffer
5219            .update(&mut cx, |buffer, _| {
5220                buffer.wait_for_version(deserialize_version(envelope.payload.version))
5221            })
5222            .await;
5223
5224        let version = buffer.read_with(&cx, |buffer, _| buffer.version());
5225        let code_actions = this.update(&mut cx, |this, cx| {
5226            Ok::<_, anyhow::Error>(this.code_actions(&buffer, start..end, cx))
5227        })?;
5228
5229        Ok(proto::GetCodeActionsResponse {
5230            actions: code_actions
5231                .await?
5232                .iter()
5233                .map(language::proto::serialize_code_action)
5234                .collect(),
5235            version: serialize_version(&version),
5236        })
5237    }
5238
5239    async fn handle_apply_code_action(
5240        this: ModelHandle<Self>,
5241        envelope: TypedEnvelope<proto::ApplyCodeAction>,
5242        _: Arc<Client>,
5243        mut cx: AsyncAppContext,
5244    ) -> Result<proto::ApplyCodeActionResponse> {
5245        let sender_id = envelope.original_sender_id()?;
5246        let action = language::proto::deserialize_code_action(
5247            envelope
5248                .payload
5249                .action
5250                .ok_or_else(|| anyhow!("invalid action"))?,
5251        )?;
5252        let apply_code_action = this.update(&mut cx, |this, cx| {
5253            let buffer = this
5254                .opened_buffers
5255                .get(&envelope.payload.buffer_id)
5256                .and_then(|buffer| buffer.upgrade(cx))
5257                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
5258            Ok::<_, anyhow::Error>(this.apply_code_action(buffer, action, false, cx))
5259        })?;
5260
5261        let project_transaction = apply_code_action.await?;
5262        let project_transaction = this.update(&mut cx, |this, cx| {
5263            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5264        });
5265        Ok(proto::ApplyCodeActionResponse {
5266            transaction: Some(project_transaction),
5267        })
5268    }
5269
5270    async fn handle_lsp_command<T: LspCommand>(
5271        this: ModelHandle<Self>,
5272        envelope: TypedEnvelope<T::ProtoRequest>,
5273        _: Arc<Client>,
5274        mut cx: AsyncAppContext,
5275    ) -> Result<<T::ProtoRequest as proto::RequestMessage>::Response>
5276    where
5277        <T::LspRequest as lsp::request::Request>::Result: Send,
5278    {
5279        let sender_id = envelope.original_sender_id()?;
5280        let buffer_id = T::buffer_id_from_proto(&envelope.payload);
5281        let buffer_handle = this.read_with(&cx, |this, _| {
5282            this.opened_buffers
5283                .get(&buffer_id)
5284                .and_then(|buffer| buffer.upgrade(&cx))
5285                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))
5286        })?;
5287        let request = T::from_proto(
5288            envelope.payload,
5289            this.clone(),
5290            buffer_handle.clone(),
5291            cx.clone(),
5292        )
5293        .await?;
5294        let buffer_version = buffer_handle.read_with(&cx, |buffer, _| buffer.version());
5295        let response = this
5296            .update(&mut cx, |this, cx| {
5297                this.request_lsp(buffer_handle, request, cx)
5298            })
5299            .await?;
5300        this.update(&mut cx, |this, cx| {
5301            Ok(T::response_to_proto(
5302                response,
5303                this,
5304                sender_id,
5305                &buffer_version,
5306                cx,
5307            ))
5308        })
5309    }
5310
5311    async fn handle_get_project_symbols(
5312        this: ModelHandle<Self>,
5313        envelope: TypedEnvelope<proto::GetProjectSymbols>,
5314        _: Arc<Client>,
5315        mut cx: AsyncAppContext,
5316    ) -> Result<proto::GetProjectSymbolsResponse> {
5317        let symbols = this
5318            .update(&mut cx, |this, cx| {
5319                this.symbols(&envelope.payload.query, cx)
5320            })
5321            .await?;
5322
5323        Ok(proto::GetProjectSymbolsResponse {
5324            symbols: symbols.iter().map(serialize_symbol).collect(),
5325        })
5326    }
5327
5328    async fn handle_search_project(
5329        this: ModelHandle<Self>,
5330        envelope: TypedEnvelope<proto::SearchProject>,
5331        _: Arc<Client>,
5332        mut cx: AsyncAppContext,
5333    ) -> Result<proto::SearchProjectResponse> {
5334        let peer_id = envelope.original_sender_id()?;
5335        let query = SearchQuery::from_proto(envelope.payload)?;
5336        let result = this
5337            .update(&mut cx, |this, cx| this.search(query, cx))
5338            .await?;
5339
5340        this.update(&mut cx, |this, cx| {
5341            let mut locations = Vec::new();
5342            for (buffer, ranges) in result {
5343                for range in ranges {
5344                    let start = serialize_anchor(&range.start);
5345                    let end = serialize_anchor(&range.end);
5346                    let buffer_id = this.create_buffer_for_peer(&buffer, peer_id, cx);
5347                    locations.push(proto::Location {
5348                        buffer_id,
5349                        start: Some(start),
5350                        end: Some(end),
5351                    });
5352                }
5353            }
5354            Ok(proto::SearchProjectResponse { locations })
5355        })
5356    }
5357
5358    async fn handle_open_buffer_for_symbol(
5359        this: ModelHandle<Self>,
5360        envelope: TypedEnvelope<proto::OpenBufferForSymbol>,
5361        _: Arc<Client>,
5362        mut cx: AsyncAppContext,
5363    ) -> Result<proto::OpenBufferForSymbolResponse> {
5364        let peer_id = envelope.original_sender_id()?;
5365        let symbol = envelope
5366            .payload
5367            .symbol
5368            .ok_or_else(|| anyhow!("invalid symbol"))?;
5369        let symbol = this
5370            .read_with(&cx, |this, _| this.deserialize_symbol(symbol))
5371            .await?;
5372        let symbol = this.read_with(&cx, |this, _| {
5373            let signature = this.symbol_signature(&symbol.path);
5374            if signature == symbol.signature {
5375                Ok(symbol)
5376            } else {
5377                Err(anyhow!("invalid symbol signature"))
5378            }
5379        })?;
5380        let buffer = this
5381            .update(&mut cx, |this, cx| this.open_buffer_for_symbol(&symbol, cx))
5382            .await?;
5383
5384        Ok(proto::OpenBufferForSymbolResponse {
5385            buffer_id: this.update(&mut cx, |this, cx| {
5386                this.create_buffer_for_peer(&buffer, peer_id, cx)
5387            }),
5388        })
5389    }
5390
5391    fn symbol_signature(&self, project_path: &ProjectPath) -> [u8; 32] {
5392        let mut hasher = Sha256::new();
5393        hasher.update(project_path.worktree_id.to_proto().to_be_bytes());
5394        hasher.update(project_path.path.to_string_lossy().as_bytes());
5395        hasher.update(self.nonce.to_be_bytes());
5396        hasher.finalize().as_slice().try_into().unwrap()
5397    }
5398
5399    async fn handle_open_buffer_by_id(
5400        this: ModelHandle<Self>,
5401        envelope: TypedEnvelope<proto::OpenBufferById>,
5402        _: Arc<Client>,
5403        mut cx: AsyncAppContext,
5404    ) -> Result<proto::OpenBufferResponse> {
5405        let peer_id = envelope.original_sender_id()?;
5406        let buffer = this
5407            .update(&mut cx, |this, cx| {
5408                this.open_buffer_by_id(envelope.payload.id, cx)
5409            })
5410            .await?;
5411        this.update(&mut cx, |this, cx| {
5412            Ok(proto::OpenBufferResponse {
5413                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
5414            })
5415        })
5416    }
5417
5418    async fn handle_open_buffer_by_path(
5419        this: ModelHandle<Self>,
5420        envelope: TypedEnvelope<proto::OpenBufferByPath>,
5421        _: Arc<Client>,
5422        mut cx: AsyncAppContext,
5423    ) -> Result<proto::OpenBufferResponse> {
5424        let peer_id = envelope.original_sender_id()?;
5425        let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
5426        let open_buffer = this.update(&mut cx, |this, cx| {
5427            this.open_buffer(
5428                ProjectPath {
5429                    worktree_id,
5430                    path: PathBuf::from(envelope.payload.path).into(),
5431                },
5432                cx,
5433            )
5434        });
5435
5436        let buffer = open_buffer.await?;
5437        this.update(&mut cx, |this, cx| {
5438            Ok(proto::OpenBufferResponse {
5439                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
5440            })
5441        })
5442    }
5443
5444    fn serialize_project_transaction_for_peer(
5445        &mut self,
5446        project_transaction: ProjectTransaction,
5447        peer_id: PeerId,
5448        cx: &AppContext,
5449    ) -> proto::ProjectTransaction {
5450        let mut serialized_transaction = proto::ProjectTransaction {
5451            buffer_ids: Default::default(),
5452            transactions: Default::default(),
5453        };
5454        for (buffer, transaction) in project_transaction.0 {
5455            serialized_transaction
5456                .buffer_ids
5457                .push(self.create_buffer_for_peer(&buffer, peer_id, cx));
5458            serialized_transaction
5459                .transactions
5460                .push(language::proto::serialize_transaction(&transaction));
5461        }
5462        serialized_transaction
5463    }
5464
5465    fn deserialize_project_transaction(
5466        &mut self,
5467        message: proto::ProjectTransaction,
5468        push_to_history: bool,
5469        cx: &mut ModelContext<Self>,
5470    ) -> Task<Result<ProjectTransaction>> {
5471        cx.spawn(|this, mut cx| async move {
5472            let mut project_transaction = ProjectTransaction::default();
5473            for (buffer_id, transaction) in message.buffer_ids.into_iter().zip(message.transactions)
5474            {
5475                let buffer = this
5476                    .update(&mut cx, |this, cx| this.wait_for_buffer(buffer_id, cx))
5477                    .await?;
5478                let transaction = language::proto::deserialize_transaction(transaction)?;
5479                project_transaction.0.insert(buffer, transaction);
5480            }
5481
5482            for (buffer, transaction) in &project_transaction.0 {
5483                buffer
5484                    .update(&mut cx, |buffer, _| {
5485                        buffer.wait_for_edits(transaction.edit_ids.iter().copied())
5486                    })
5487                    .await;
5488
5489                if push_to_history {
5490                    buffer.update(&mut cx, |buffer, _| {
5491                        buffer.push_transaction(transaction.clone(), Instant::now());
5492                    });
5493                }
5494            }
5495
5496            Ok(project_transaction)
5497        })
5498    }
5499
5500    fn create_buffer_for_peer(
5501        &mut self,
5502        buffer: &ModelHandle<Buffer>,
5503        peer_id: PeerId,
5504        cx: &AppContext,
5505    ) -> u64 {
5506        let buffer_id = buffer.read(cx).remote_id();
5507        if let Some(project_id) = self.remote_id() {
5508            let shared_buffers = self.shared_buffers.entry(peer_id).or_default();
5509            if shared_buffers.insert(buffer_id) {
5510                let buffer = buffer.read(cx);
5511                let state = buffer.to_proto();
5512                let operations = buffer.serialize_ops(cx);
5513                let client = self.client.clone();
5514                cx.background()
5515                    .spawn(
5516                        async move {
5517                            let mut operations = operations.await;
5518
5519                            client.send(proto::CreateBufferForPeer {
5520                                project_id,
5521                                peer_id: peer_id.0,
5522                                variant: Some(proto::create_buffer_for_peer::Variant::State(state)),
5523                            })?;
5524
5525                            loop {
5526                                #[cfg(any(test, feature = "test-support"))]
5527                                const CHUNK_SIZE: usize = 5;
5528
5529                                #[cfg(not(any(test, feature = "test-support")))]
5530                                const CHUNK_SIZE: usize = 100;
5531
5532                                let chunk = operations
5533                                    .drain(..cmp::min(CHUNK_SIZE, operations.len()))
5534                                    .collect();
5535                                let is_last = operations.is_empty();
5536                                client.send(proto::CreateBufferForPeer {
5537                                    project_id,
5538                                    peer_id: peer_id.0,
5539                                    variant: Some(proto::create_buffer_for_peer::Variant::Chunk(
5540                                        proto::BufferChunk {
5541                                            buffer_id,
5542                                            operations: chunk,
5543                                            is_last,
5544                                        },
5545                                    )),
5546                                })?;
5547
5548                                if is_last {
5549                                    break;
5550                                }
5551                            }
5552
5553                            Ok(())
5554                        }
5555                        .log_err(),
5556                    )
5557                    .detach();
5558            }
5559        }
5560
5561        buffer_id
5562    }
5563
5564    fn wait_for_buffer(
5565        &self,
5566        id: u64,
5567        cx: &mut ModelContext<Self>,
5568    ) -> Task<Result<ModelHandle<Buffer>>> {
5569        let mut opened_buffer_rx = self.opened_buffer.1.clone();
5570        cx.spawn(|this, mut cx| async move {
5571            let buffer = loop {
5572                let buffer = this.read_with(&cx, |this, cx| {
5573                    this.opened_buffers
5574                        .get(&id)
5575                        .and_then(|buffer| buffer.upgrade(cx))
5576                });
5577                if let Some(buffer) = buffer {
5578                    break buffer;
5579                } else if this.read_with(&cx, |this, _| this.is_read_only()) {
5580                    return Err(anyhow!("disconnected before buffer {} could be opened", id));
5581                }
5582
5583                opened_buffer_rx
5584                    .next()
5585                    .await
5586                    .ok_or_else(|| anyhow!("project dropped while waiting for buffer"))?;
5587            };
5588            buffer.update(&mut cx, |buffer, cx| buffer.git_diff_recalc(cx));
5589            Ok(buffer)
5590        })
5591    }
5592
5593    fn deserialize_symbol(
5594        &self,
5595        serialized_symbol: proto::Symbol,
5596    ) -> impl Future<Output = Result<Symbol>> {
5597        let languages = self.languages.clone();
5598        async move {
5599            let source_worktree_id = WorktreeId::from_proto(serialized_symbol.source_worktree_id);
5600            let worktree_id = WorktreeId::from_proto(serialized_symbol.worktree_id);
5601            let start = serialized_symbol
5602                .start
5603                .ok_or_else(|| anyhow!("invalid start"))?;
5604            let end = serialized_symbol
5605                .end
5606                .ok_or_else(|| anyhow!("invalid end"))?;
5607            let kind = unsafe { mem::transmute(serialized_symbol.kind) };
5608            let path = ProjectPath {
5609                worktree_id,
5610                path: PathBuf::from(serialized_symbol.path).into(),
5611            };
5612            let language = languages.select_language(&path.path);
5613            Ok(Symbol {
5614                language_server_name: LanguageServerName(
5615                    serialized_symbol.language_server_name.into(),
5616                ),
5617                source_worktree_id,
5618                path,
5619                label: {
5620                    match language {
5621                        Some(language) => {
5622                            language
5623                                .label_for_symbol(&serialized_symbol.name, kind)
5624                                .await
5625                        }
5626                        None => None,
5627                    }
5628                    .unwrap_or_else(|| CodeLabel::plain(serialized_symbol.name.clone(), None))
5629                },
5630
5631                name: serialized_symbol.name,
5632                range: Unclipped(PointUtf16::new(start.row, start.column))
5633                    ..Unclipped(PointUtf16::new(end.row, end.column)),
5634                kind,
5635                signature: serialized_symbol
5636                    .signature
5637                    .try_into()
5638                    .map_err(|_| anyhow!("invalid signature"))?,
5639            })
5640        }
5641    }
5642
5643    async fn handle_buffer_saved(
5644        this: ModelHandle<Self>,
5645        envelope: TypedEnvelope<proto::BufferSaved>,
5646        _: Arc<Client>,
5647        mut cx: AsyncAppContext,
5648    ) -> Result<()> {
5649        let version = deserialize_version(envelope.payload.version);
5650        let mtime = envelope
5651            .payload
5652            .mtime
5653            .ok_or_else(|| anyhow!("missing mtime"))?
5654            .into();
5655
5656        this.update(&mut cx, |this, cx| {
5657            let buffer = this
5658                .opened_buffers
5659                .get(&envelope.payload.buffer_id)
5660                .and_then(|buffer| buffer.upgrade(cx));
5661            if let Some(buffer) = buffer {
5662                buffer.update(cx, |buffer, cx| {
5663                    buffer.did_save(version, envelope.payload.fingerprint, mtime, None, cx);
5664                });
5665            }
5666            Ok(())
5667        })
5668    }
5669
5670    async fn handle_buffer_reloaded(
5671        this: ModelHandle<Self>,
5672        envelope: TypedEnvelope<proto::BufferReloaded>,
5673        _: Arc<Client>,
5674        mut cx: AsyncAppContext,
5675    ) -> Result<()> {
5676        let payload = envelope.payload;
5677        let version = deserialize_version(payload.version);
5678        let line_ending = deserialize_line_ending(
5679            proto::LineEnding::from_i32(payload.line_ending)
5680                .ok_or_else(|| anyhow!("missing line ending"))?,
5681        );
5682        let mtime = payload
5683            .mtime
5684            .ok_or_else(|| anyhow!("missing mtime"))?
5685            .into();
5686        this.update(&mut cx, |this, cx| {
5687            let buffer = this
5688                .opened_buffers
5689                .get(&payload.buffer_id)
5690                .and_then(|buffer| buffer.upgrade(cx));
5691            if let Some(buffer) = buffer {
5692                buffer.update(cx, |buffer, cx| {
5693                    buffer.did_reload(version, payload.fingerprint, line_ending, mtime, cx);
5694                });
5695            }
5696            Ok(())
5697        })
5698    }
5699
5700    #[allow(clippy::type_complexity)]
5701    fn edits_from_lsp(
5702        &mut self,
5703        buffer: &ModelHandle<Buffer>,
5704        lsp_edits: impl 'static + Send + IntoIterator<Item = lsp::TextEdit>,
5705        version: Option<i32>,
5706        cx: &mut ModelContext<Self>,
5707    ) -> Task<Result<Vec<(Range<Anchor>, String)>>> {
5708        let snapshot = self.buffer_snapshot_for_lsp_version(buffer, version, cx);
5709        cx.background().spawn(async move {
5710            let snapshot = snapshot?;
5711            let mut lsp_edits = lsp_edits
5712                .into_iter()
5713                .map(|edit| (range_from_lsp(edit.range), edit.new_text))
5714                .collect::<Vec<_>>();
5715            lsp_edits.sort_by_key(|(range, _)| range.start);
5716
5717            let mut lsp_edits = lsp_edits.into_iter().peekable();
5718            let mut edits = Vec::new();
5719            while let Some((range, mut new_text)) = lsp_edits.next() {
5720                // Clip invalid ranges provided by the language server.
5721                let mut range = snapshot.clip_point_utf16(range.start, Bias::Left)
5722                    ..snapshot.clip_point_utf16(range.end, Bias::Left);
5723
5724                // Combine any LSP edits that are adjacent.
5725                //
5726                // Also, combine LSP edits that are separated from each other by only
5727                // a newline. This is important because for some code actions,
5728                // Rust-analyzer rewrites the entire buffer via a series of edits that
5729                // are separated by unchanged newline characters.
5730                //
5731                // In order for the diffing logic below to work properly, any edits that
5732                // cancel each other out must be combined into one.
5733                while let Some((next_range, next_text)) = lsp_edits.peek() {
5734                    if next_range.start.0 > range.end {
5735                        if next_range.start.0.row > range.end.row + 1
5736                            || next_range.start.0.column > 0
5737                            || snapshot.clip_point_utf16(
5738                                Unclipped(PointUtf16::new(range.end.row, u32::MAX)),
5739                                Bias::Left,
5740                            ) > range.end
5741                        {
5742                            break;
5743                        }
5744                        new_text.push('\n');
5745                    }
5746                    range.end = snapshot.clip_point_utf16(next_range.end, Bias::Left);
5747                    new_text.push_str(next_text);
5748                    lsp_edits.next();
5749                }
5750
5751                // For multiline edits, perform a diff of the old and new text so that
5752                // we can identify the changes more precisely, preserving the locations
5753                // of any anchors positioned in the unchanged regions.
5754                if range.end.row > range.start.row {
5755                    let mut offset = range.start.to_offset(&snapshot);
5756                    let old_text = snapshot.text_for_range(range).collect::<String>();
5757
5758                    let diff = TextDiff::from_lines(old_text.as_str(), &new_text);
5759                    let mut moved_since_edit = true;
5760                    for change in diff.iter_all_changes() {
5761                        let tag = change.tag();
5762                        let value = change.value();
5763                        match tag {
5764                            ChangeTag::Equal => {
5765                                offset += value.len();
5766                                moved_since_edit = true;
5767                            }
5768                            ChangeTag::Delete => {
5769                                let start = snapshot.anchor_after(offset);
5770                                let end = snapshot.anchor_before(offset + value.len());
5771                                if moved_since_edit {
5772                                    edits.push((start..end, String::new()));
5773                                } else {
5774                                    edits.last_mut().unwrap().0.end = end;
5775                                }
5776                                offset += value.len();
5777                                moved_since_edit = false;
5778                            }
5779                            ChangeTag::Insert => {
5780                                if moved_since_edit {
5781                                    let anchor = snapshot.anchor_after(offset);
5782                                    edits.push((anchor..anchor, value.to_string()));
5783                                } else {
5784                                    edits.last_mut().unwrap().1.push_str(value);
5785                                }
5786                                moved_since_edit = false;
5787                            }
5788                        }
5789                    }
5790                } else if range.end == range.start {
5791                    let anchor = snapshot.anchor_after(range.start);
5792                    edits.push((anchor..anchor, new_text));
5793                } else {
5794                    let edit_start = snapshot.anchor_after(range.start);
5795                    let edit_end = snapshot.anchor_before(range.end);
5796                    edits.push((edit_start..edit_end, new_text));
5797                }
5798            }
5799
5800            Ok(edits)
5801        })
5802    }
5803
5804    fn buffer_snapshot_for_lsp_version(
5805        &mut self,
5806        buffer: &ModelHandle<Buffer>,
5807        version: Option<i32>,
5808        cx: &AppContext,
5809    ) -> Result<TextBufferSnapshot> {
5810        const OLD_VERSIONS_TO_RETAIN: i32 = 10;
5811
5812        if let Some(version) = version {
5813            let buffer_id = buffer.read(cx).remote_id();
5814            let snapshots = self
5815                .buffer_snapshots
5816                .get_mut(&buffer_id)
5817                .ok_or_else(|| anyhow!("no snapshot found for buffer {}", buffer_id))?;
5818            let mut found_snapshot = None;
5819            snapshots.retain(|(snapshot_version, snapshot)| {
5820                if snapshot_version + OLD_VERSIONS_TO_RETAIN < version {
5821                    false
5822                } else {
5823                    if *snapshot_version == version {
5824                        found_snapshot = Some(snapshot.clone());
5825                    }
5826                    true
5827                }
5828            });
5829
5830            found_snapshot.ok_or_else(|| {
5831                anyhow!(
5832                    "snapshot not found for buffer {} at version {}",
5833                    buffer_id,
5834                    version
5835                )
5836            })
5837        } else {
5838            Ok((buffer.read(cx)).text_snapshot())
5839        }
5840    }
5841
5842    fn language_server_for_buffer(
5843        &self,
5844        buffer: &Buffer,
5845        cx: &AppContext,
5846    ) -> Option<(&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
5847        if let Some((file, language)) = File::from_dyn(buffer.file()).zip(buffer.language()) {
5848            let name = language.lsp_adapter()?.name.clone();
5849            let worktree_id = file.worktree_id(cx);
5850            let key = (worktree_id, name);
5851
5852            if let Some(server_id) = self.language_server_ids.get(&key) {
5853                if let Some(LanguageServerState::Running {
5854                    adapter, server, ..
5855                }) = self.language_servers.get(server_id)
5856                {
5857                    return Some((adapter, server));
5858                }
5859            }
5860        }
5861
5862        None
5863    }
5864}
5865
5866impl ProjectStore {
5867    pub fn new() -> Self {
5868        Self {
5869            projects: Default::default(),
5870        }
5871    }
5872
5873    pub fn projects<'a>(
5874        &'a self,
5875        cx: &'a AppContext,
5876    ) -> impl 'a + Iterator<Item = ModelHandle<Project>> {
5877        self.projects
5878            .iter()
5879            .filter_map(|project| project.upgrade(cx))
5880    }
5881
5882    fn add_project(&mut self, project: WeakModelHandle<Project>, cx: &mut ModelContext<Self>) {
5883        if let Err(ix) = self
5884            .projects
5885            .binary_search_by_key(&project.id(), WeakModelHandle::id)
5886        {
5887            self.projects.insert(ix, project);
5888        }
5889        cx.notify();
5890    }
5891
5892    fn prune_projects(&mut self, cx: &mut ModelContext<Self>) {
5893        let mut did_change = false;
5894        self.projects.retain(|project| {
5895            if project.is_upgradable(cx) {
5896                true
5897            } else {
5898                did_change = true;
5899                false
5900            }
5901        });
5902        if did_change {
5903            cx.notify();
5904        }
5905    }
5906}
5907
5908impl WorktreeHandle {
5909    pub fn upgrade(&self, cx: &AppContext) -> Option<ModelHandle<Worktree>> {
5910        match self {
5911            WorktreeHandle::Strong(handle) => Some(handle.clone()),
5912            WorktreeHandle::Weak(handle) => handle.upgrade(cx),
5913        }
5914    }
5915}
5916
5917impl OpenBuffer {
5918    pub fn upgrade(&self, cx: &impl UpgradeModelHandle) -> Option<ModelHandle<Buffer>> {
5919        match self {
5920            OpenBuffer::Strong(handle) => Some(handle.clone()),
5921            OpenBuffer::Weak(handle) => handle.upgrade(cx),
5922            OpenBuffer::Operations(_) => None,
5923        }
5924    }
5925}
5926
5927pub struct PathMatchCandidateSet {
5928    pub snapshot: Snapshot,
5929    pub include_ignored: bool,
5930    pub include_root_name: bool,
5931}
5932
5933impl<'a> fuzzy::PathMatchCandidateSet<'a> for PathMatchCandidateSet {
5934    type Candidates = PathMatchCandidateSetIter<'a>;
5935
5936    fn id(&self) -> usize {
5937        self.snapshot.id().to_usize()
5938    }
5939
5940    fn len(&self) -> usize {
5941        if self.include_ignored {
5942            self.snapshot.file_count()
5943        } else {
5944            self.snapshot.visible_file_count()
5945        }
5946    }
5947
5948    fn prefix(&self) -> Arc<str> {
5949        if self.snapshot.root_entry().map_or(false, |e| e.is_file()) {
5950            self.snapshot.root_name().into()
5951        } else if self.include_root_name {
5952            format!("{}/", self.snapshot.root_name()).into()
5953        } else {
5954            "".into()
5955        }
5956    }
5957
5958    fn candidates(&'a self, start: usize) -> Self::Candidates {
5959        PathMatchCandidateSetIter {
5960            traversal: self.snapshot.files(self.include_ignored, start),
5961        }
5962    }
5963}
5964
5965pub struct PathMatchCandidateSetIter<'a> {
5966    traversal: Traversal<'a>,
5967}
5968
5969impl<'a> Iterator for PathMatchCandidateSetIter<'a> {
5970    type Item = fuzzy::PathMatchCandidate<'a>;
5971
5972    fn next(&mut self) -> Option<Self::Item> {
5973        self.traversal.next().map(|entry| {
5974            if let EntryKind::File(char_bag) = entry.kind {
5975                fuzzy::PathMatchCandidate {
5976                    path: &entry.path,
5977                    char_bag,
5978                }
5979            } else {
5980                unreachable!()
5981            }
5982        })
5983    }
5984}
5985
5986impl Entity for ProjectStore {
5987    type Event = ();
5988}
5989
5990impl Entity for Project {
5991    type Event = Event;
5992
5993    fn release(&mut self, cx: &mut gpui::MutableAppContext) {
5994        self.project_store.update(cx, ProjectStore::prune_projects);
5995
5996        match &self.client_state {
5997            Some(ProjectClientState::Local { remote_id, .. }) => {
5998                self.client
5999                    .send(proto::UnshareProject {
6000                        project_id: *remote_id,
6001                    })
6002                    .log_err();
6003            }
6004            Some(ProjectClientState::Remote { remote_id, .. }) => {
6005                self.client
6006                    .send(proto::LeaveProject {
6007                        project_id: *remote_id,
6008                    })
6009                    .log_err();
6010            }
6011            _ => {}
6012        }
6013    }
6014
6015    fn app_will_quit(
6016        &mut self,
6017        _: &mut MutableAppContext,
6018    ) -> Option<std::pin::Pin<Box<dyn 'static + Future<Output = ()>>>> {
6019        let shutdown_futures = self
6020            .language_servers
6021            .drain()
6022            .map(|(_, server_state)| async {
6023                match server_state {
6024                    LanguageServerState::Running { server, .. } => server.shutdown()?.await,
6025                    LanguageServerState::Starting(starting_server) => {
6026                        starting_server.await?.shutdown()?.await
6027                    }
6028                }
6029            })
6030            .collect::<Vec<_>>();
6031
6032        Some(
6033            async move {
6034                futures::future::join_all(shutdown_futures).await;
6035            }
6036            .boxed(),
6037        )
6038    }
6039}
6040
6041impl Collaborator {
6042    fn from_proto(message: proto::Collaborator) -> Self {
6043        Self {
6044            peer_id: PeerId(message.peer_id),
6045            replica_id: message.replica_id as ReplicaId,
6046        }
6047    }
6048}
6049
6050impl<P: AsRef<Path>> From<(WorktreeId, P)> for ProjectPath {
6051    fn from((worktree_id, path): (WorktreeId, P)) -> Self {
6052        Self {
6053            worktree_id,
6054            path: path.as_ref().into(),
6055        }
6056    }
6057}
6058
6059fn serialize_symbol(symbol: &Symbol) -> proto::Symbol {
6060    proto::Symbol {
6061        language_server_name: symbol.language_server_name.0.to_string(),
6062        source_worktree_id: symbol.source_worktree_id.to_proto(),
6063        worktree_id: symbol.path.worktree_id.to_proto(),
6064        path: symbol.path.path.to_string_lossy().to_string(),
6065        name: symbol.name.clone(),
6066        kind: unsafe { mem::transmute(symbol.kind) },
6067        start: Some(proto::PointUtf16 {
6068            row: symbol.range.start.0.row,
6069            column: symbol.range.start.0.column,
6070        }),
6071        end: Some(proto::PointUtf16 {
6072            row: symbol.range.end.0.row,
6073            column: symbol.range.end.0.column,
6074        }),
6075        signature: symbol.signature.to_vec(),
6076    }
6077}
6078
6079fn relativize_path(base: &Path, path: &Path) -> PathBuf {
6080    let mut path_components = path.components();
6081    let mut base_components = base.components();
6082    let mut components: Vec<Component> = Vec::new();
6083    loop {
6084        match (path_components.next(), base_components.next()) {
6085            (None, None) => break,
6086            (Some(a), None) => {
6087                components.push(a);
6088                components.extend(path_components.by_ref());
6089                break;
6090            }
6091            (None, _) => components.push(Component::ParentDir),
6092            (Some(a), Some(b)) if components.is_empty() && a == b => (),
6093            (Some(a), Some(b)) if b == Component::CurDir => components.push(a),
6094            (Some(a), Some(_)) => {
6095                components.push(Component::ParentDir);
6096                for _ in base_components {
6097                    components.push(Component::ParentDir);
6098                }
6099                components.push(a);
6100                components.extend(path_components.by_ref());
6101                break;
6102            }
6103        }
6104    }
6105    components.iter().map(|c| c.as_os_str()).collect()
6106}
6107
6108impl Item for Buffer {
6109    fn entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId> {
6110        File::from_dyn(self.file()).and_then(|file| file.project_entry_id(cx))
6111    }
6112}