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, TypedEnvelope, UserStore};
  11use clock::ReplicaId;
  12use collections::{hash_map, BTreeMap, HashMap, HashSet};
  13use futures::{
  14    channel::{mpsc, oneshot},
  15    future::Shared,
  16    select_biased, AsyncWriteExt, Future, FutureExt, StreamExt, TryFutureExt,
  17};
  18use gpui::{
  19    AnyModelHandle, AppContext, AsyncAppContext, Entity, ModelContext, ModelHandle,
  20    MutableAppContext, Task, UpgradeModelHandle, WeakModelHandle,
  21};
  22use language::{
  23    point_to_lsp,
  24    proto::{
  25        deserialize_anchor, deserialize_line_ending, deserialize_version, serialize_anchor,
  26        serialize_version,
  27    },
  28    range_from_lsp, range_to_lsp, Anchor, Bias, Buffer, CachedLspAdapter, CharKind, CodeAction,
  29    CodeLabel, Completion, Diagnostic, DiagnosticEntry, DiagnosticSet, Event as BufferEvent,
  30    File as _, Language, LanguageRegistry, LanguageServerName, LocalFile, OffsetRangeExt,
  31    Operation, Patch, PointUtf16, TextBufferSnapshot, ToOffset, ToPointUtf16, Transaction,
  32    Unclipped,
  33};
  34use lsp::{
  35    DiagnosticSeverity, DiagnosticTag, DocumentHighlightKind, LanguageServer, LanguageString,
  36    MarkedString,
  37};
  38use lsp_command::*;
  39use parking_lot::Mutex;
  40use postage::watch;
  41use rand::prelude::*;
  42use search::SearchQuery;
  43use serde::Serialize;
  44use settings::{FormatOnSave, Formatter, Settings};
  45use sha2::{Digest, Sha256};
  46use similar::{ChangeTag, TextDiff};
  47use std::{
  48    cell::RefCell,
  49    cmp::{self, Ordering},
  50    convert::TryInto,
  51    hash::Hash,
  52    mem,
  53    num::NonZeroU32,
  54    ops::Range,
  55    path::{Component, Path, PathBuf},
  56    rc::Rc,
  57    str,
  58    sync::{
  59        atomic::{AtomicUsize, Ordering::SeqCst},
  60        Arc,
  61    },
  62    time::Instant,
  63};
  64use terminal::{Terminal, TerminalBuilder};
  65use thiserror::Error;
  66use util::{defer, post_inc, ResultExt, TryFutureExt as _};
  67
  68pub use fs::*;
  69pub use worktree::*;
  70
  71pub trait Item: Entity {
  72    fn entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId>;
  73}
  74
  75// Language server state is stored across 3 collections:
  76//     language_servers =>
  77//         a mapping from unique server id to LanguageServerState which can either be a task for a
  78//         server in the process of starting, or a running server with adapter and language server arcs
  79//     language_server_ids => a mapping from worktreeId and server name to the unique server id
  80//     language_server_statuses => a mapping from unique server id to the current server status
  81//
  82// Multiple worktrees can map to the same language server for example when you jump to the definition
  83// of a file in the standard library. So language_server_ids is used to look up which server is active
  84// for a given worktree and language server name
  85//
  86// When starting a language server, first the id map is checked to make sure a server isn't already available
  87// for that worktree. If there is one, it finishes early. Otherwise, a new id is allocated and and
  88// the Starting variant of LanguageServerState is stored in the language_servers map.
  89pub struct Project {
  90    worktrees: Vec<WorktreeHandle>,
  91    active_entry: Option<ProjectEntryId>,
  92    languages: Arc<LanguageRegistry>,
  93    language_servers: HashMap<usize, LanguageServerState>,
  94    language_server_ids: HashMap<(WorktreeId, LanguageServerName), usize>,
  95    language_server_statuses: BTreeMap<usize, LanguageServerStatus>,
  96    language_server_settings: Arc<Mutex<serde_json::Value>>,
  97    last_workspace_edits_by_language_server: HashMap<usize, ProjectTransaction>,
  98    next_language_server_id: usize,
  99    client: Arc<client::Client>,
 100    next_entry_id: Arc<AtomicUsize>,
 101    next_diagnostic_group_id: usize,
 102    user_store: ModelHandle<UserStore>,
 103    fs: Arc<dyn Fs>,
 104    client_state: Option<ProjectClientState>,
 105    collaborators: HashMap<proto::PeerId, Collaborator>,
 106    client_subscriptions: Vec<client::Subscription>,
 107    _subscriptions: Vec<gpui::Subscription>,
 108    opened_buffer: (watch::Sender<()>, watch::Receiver<()>),
 109    shared_buffers: HashMap<proto::PeerId, HashSet<u64>>,
 110    #[allow(clippy::type_complexity)]
 111    loading_buffers: HashMap<
 112        ProjectPath,
 113        postage::watch::Receiver<Option<Result<ModelHandle<Buffer>, Arc<anyhow::Error>>>>,
 114    >,
 115    #[allow(clippy::type_complexity)]
 116    loading_local_worktrees:
 117        HashMap<Arc<Path>, Shared<Task<Result<ModelHandle<Worktree>, Arc<anyhow::Error>>>>>,
 118    opened_buffers: HashMap<u64, OpenBuffer>,
 119    incomplete_buffers: HashMap<u64, ModelHandle<Buffer>>,
 120    buffer_snapshots: HashMap<u64, Vec<(i32, TextBufferSnapshot)>>,
 121    buffers_being_formatted: HashSet<usize>,
 122    nonce: u128,
 123    _maintain_buffer_languages: Task<()>,
 124}
 125
 126#[derive(Error, Debug)]
 127pub enum JoinProjectError {
 128    #[error("host declined join request")]
 129    HostDeclined,
 130    #[error("host closed the project")]
 131    HostClosedProject,
 132    #[error("host went offline")]
 133    HostWentOffline,
 134    #[error("{0}")]
 135    Other(#[from] anyhow::Error),
 136}
 137
 138enum OpenBuffer {
 139    Strong(ModelHandle<Buffer>),
 140    Weak(WeakModelHandle<Buffer>),
 141    Operations(Vec<Operation>),
 142}
 143
 144enum WorktreeHandle {
 145    Strong(ModelHandle<Worktree>),
 146    Weak(WeakModelHandle<Worktree>),
 147}
 148
 149enum ProjectClientState {
 150    Local {
 151        remote_id: u64,
 152        metadata_changed: mpsc::UnboundedSender<oneshot::Sender<()>>,
 153        _maintain_metadata: Task<()>,
 154    },
 155    Remote {
 156        sharing_has_stopped: bool,
 157        remote_id: u64,
 158        replica_id: ReplicaId,
 159    },
 160}
 161
 162#[derive(Clone, Debug)]
 163pub struct Collaborator {
 164    pub peer_id: proto::PeerId,
 165    pub replica_id: ReplicaId,
 166}
 167
 168#[derive(Clone, Debug, PartialEq, Eq)]
 169pub enum Event {
 170    ActiveEntryChanged(Option<ProjectEntryId>),
 171    WorktreeAdded,
 172    WorktreeRemoved(WorktreeId),
 173    DiskBasedDiagnosticsStarted {
 174        language_server_id: usize,
 175    },
 176    DiskBasedDiagnosticsFinished {
 177        language_server_id: usize,
 178    },
 179    DiagnosticsUpdated {
 180        path: ProjectPath,
 181        language_server_id: usize,
 182    },
 183    RemoteIdChanged(Option<u64>),
 184    DisconnectedFromHost,
 185    CollaboratorLeft(proto::PeerId),
 186}
 187
 188pub enum LanguageServerState {
 189    Starting(Task<Option<Arc<LanguageServer>>>),
 190    Running {
 191        language: Arc<Language>,
 192        adapter: Arc<CachedLspAdapter>,
 193        server: Arc<LanguageServer>,
 194    },
 195}
 196
 197#[derive(Serialize)]
 198pub struct LanguageServerStatus {
 199    pub name: String,
 200    pub pending_work: BTreeMap<String, LanguageServerProgress>,
 201    pub has_pending_diagnostic_updates: bool,
 202    progress_tokens: HashSet<String>,
 203}
 204
 205#[derive(Clone, Debug, Serialize)]
 206pub struct LanguageServerProgress {
 207    pub message: Option<String>,
 208    pub percentage: Option<usize>,
 209    #[serde(skip_serializing)]
 210    pub last_update_at: Instant,
 211}
 212
 213#[derive(Clone, Debug, Eq, PartialEq, Hash, PartialOrd, Ord)]
 214pub struct ProjectPath {
 215    pub worktree_id: WorktreeId,
 216    pub path: Arc<Path>,
 217}
 218
 219#[derive(Copy, Clone, Debug, Default, PartialEq, Serialize)]
 220pub struct DiagnosticSummary {
 221    pub language_server_id: usize,
 222    pub error_count: usize,
 223    pub warning_count: usize,
 224}
 225
 226#[derive(Debug, Clone)]
 227pub struct Location {
 228    pub buffer: ModelHandle<Buffer>,
 229    pub range: Range<language::Anchor>,
 230}
 231
 232#[derive(Debug, Clone)]
 233pub struct LocationLink {
 234    pub origin: Option<Location>,
 235    pub target: Location,
 236}
 237
 238#[derive(Debug)]
 239pub struct DocumentHighlight {
 240    pub range: Range<language::Anchor>,
 241    pub kind: DocumentHighlightKind,
 242}
 243
 244#[derive(Clone, Debug)]
 245pub struct Symbol {
 246    pub language_server_name: LanguageServerName,
 247    pub source_worktree_id: WorktreeId,
 248    pub path: ProjectPath,
 249    pub label: CodeLabel,
 250    pub name: String,
 251    pub kind: lsp::SymbolKind,
 252    pub range: Range<Unclipped<PointUtf16>>,
 253    pub signature: [u8; 32],
 254}
 255
 256#[derive(Clone, Debug, PartialEq)]
 257pub struct HoverBlock {
 258    pub text: String,
 259    pub language: Option<String>,
 260}
 261
 262impl HoverBlock {
 263    fn try_new(marked_string: MarkedString) -> Option<Self> {
 264        let result = match marked_string {
 265            MarkedString::LanguageString(LanguageString { language, value }) => HoverBlock {
 266                text: value,
 267                language: Some(language),
 268            },
 269            MarkedString::String(text) => HoverBlock {
 270                text,
 271                language: None,
 272            },
 273        };
 274        if result.text.is_empty() {
 275            None
 276        } else {
 277            Some(result)
 278        }
 279    }
 280}
 281
 282#[derive(Debug)]
 283pub struct Hover {
 284    pub contents: Vec<HoverBlock>,
 285    pub range: Option<Range<language::Anchor>>,
 286}
 287
 288#[derive(Default)]
 289pub struct ProjectTransaction(pub HashMap<ModelHandle<Buffer>, language::Transaction>);
 290
 291impl DiagnosticSummary {
 292    fn new<'a, T: 'a>(
 293        language_server_id: usize,
 294        diagnostics: impl IntoIterator<Item = &'a DiagnosticEntry<T>>,
 295    ) -> Self {
 296        let mut this = Self {
 297            language_server_id,
 298            error_count: 0,
 299            warning_count: 0,
 300        };
 301
 302        for entry in diagnostics {
 303            if entry.diagnostic.is_primary {
 304                match entry.diagnostic.severity {
 305                    DiagnosticSeverity::ERROR => this.error_count += 1,
 306                    DiagnosticSeverity::WARNING => this.warning_count += 1,
 307                    _ => {}
 308                }
 309            }
 310        }
 311
 312        this
 313    }
 314
 315    pub fn is_empty(&self) -> bool {
 316        self.error_count == 0 && self.warning_count == 0
 317    }
 318
 319    pub fn to_proto(&self, path: &Path) -> proto::DiagnosticSummary {
 320        proto::DiagnosticSummary {
 321            path: path.to_string_lossy().to_string(),
 322            language_server_id: self.language_server_id as u64,
 323            error_count: self.error_count as u32,
 324            warning_count: self.warning_count as u32,
 325        }
 326    }
 327}
 328
 329#[derive(Clone, Copy, Debug, Default, Hash, PartialEq, Eq, PartialOrd, Ord)]
 330pub struct ProjectEntryId(usize);
 331
 332impl ProjectEntryId {
 333    pub const MAX: Self = Self(usize::MAX);
 334
 335    pub fn new(counter: &AtomicUsize) -> Self {
 336        Self(counter.fetch_add(1, SeqCst))
 337    }
 338
 339    pub fn from_proto(id: u64) -> Self {
 340        Self(id as usize)
 341    }
 342
 343    pub fn to_proto(&self) -> u64 {
 344        self.0 as u64
 345    }
 346
 347    pub fn to_usize(&self) -> usize {
 348        self.0
 349    }
 350}
 351
 352#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 353pub enum FormatTrigger {
 354    Save,
 355    Manual,
 356}
 357
 358impl FormatTrigger {
 359    fn from_proto(value: i32) -> FormatTrigger {
 360        match value {
 361            0 => FormatTrigger::Save,
 362            1 => FormatTrigger::Manual,
 363            _ => FormatTrigger::Save,
 364        }
 365    }
 366}
 367
 368impl Project {
 369    pub fn init(client: &Arc<Client>) {
 370        client.add_model_message_handler(Self::handle_add_collaborator);
 371        client.add_model_message_handler(Self::handle_buffer_reloaded);
 372        client.add_model_message_handler(Self::handle_buffer_saved);
 373        client.add_model_message_handler(Self::handle_start_language_server);
 374        client.add_model_message_handler(Self::handle_update_language_server);
 375        client.add_model_message_handler(Self::handle_remove_collaborator);
 376        client.add_model_message_handler(Self::handle_update_project);
 377        client.add_model_message_handler(Self::handle_unshare_project);
 378        client.add_model_message_handler(Self::handle_create_buffer_for_peer);
 379        client.add_model_message_handler(Self::handle_update_buffer_file);
 380        client.add_model_message_handler(Self::handle_update_buffer);
 381        client.add_model_message_handler(Self::handle_update_diagnostic_summary);
 382        client.add_model_message_handler(Self::handle_update_worktree);
 383        client.add_model_request_handler(Self::handle_create_project_entry);
 384        client.add_model_request_handler(Self::handle_rename_project_entry);
 385        client.add_model_request_handler(Self::handle_copy_project_entry);
 386        client.add_model_request_handler(Self::handle_delete_project_entry);
 387        client.add_model_request_handler(Self::handle_apply_additional_edits_for_completion);
 388        client.add_model_request_handler(Self::handle_apply_code_action);
 389        client.add_model_request_handler(Self::handle_reload_buffers);
 390        client.add_model_request_handler(Self::handle_format_buffers);
 391        client.add_model_request_handler(Self::handle_get_code_actions);
 392        client.add_model_request_handler(Self::handle_get_completions);
 393        client.add_model_request_handler(Self::handle_lsp_command::<GetHover>);
 394        client.add_model_request_handler(Self::handle_lsp_command::<GetDefinition>);
 395        client.add_model_request_handler(Self::handle_lsp_command::<GetTypeDefinition>);
 396        client.add_model_request_handler(Self::handle_lsp_command::<GetDocumentHighlights>);
 397        client.add_model_request_handler(Self::handle_lsp_command::<GetReferences>);
 398        client.add_model_request_handler(Self::handle_lsp_command::<PrepareRename>);
 399        client.add_model_request_handler(Self::handle_lsp_command::<PerformRename>);
 400        client.add_model_request_handler(Self::handle_search_project);
 401        client.add_model_request_handler(Self::handle_get_project_symbols);
 402        client.add_model_request_handler(Self::handle_open_buffer_for_symbol);
 403        client.add_model_request_handler(Self::handle_open_buffer_by_id);
 404        client.add_model_request_handler(Self::handle_open_buffer_by_path);
 405        client.add_model_request_handler(Self::handle_save_buffer);
 406        client.add_model_message_handler(Self::handle_update_diff_base);
 407    }
 408
 409    pub fn local(
 410        client: Arc<Client>,
 411        user_store: ModelHandle<UserStore>,
 412        languages: Arc<LanguageRegistry>,
 413        fs: Arc<dyn Fs>,
 414        cx: &mut MutableAppContext,
 415    ) -> ModelHandle<Self> {
 416        cx.add_model(|cx: &mut ModelContext<Self>| Self {
 417            worktrees: Default::default(),
 418            collaborators: Default::default(),
 419            opened_buffers: Default::default(),
 420            shared_buffers: Default::default(),
 421            incomplete_buffers: Default::default(),
 422            loading_buffers: Default::default(),
 423            loading_local_worktrees: Default::default(),
 424            buffer_snapshots: Default::default(),
 425            client_state: None,
 426            opened_buffer: watch::channel(),
 427            client_subscriptions: Vec::new(),
 428            _subscriptions: vec![cx.observe_global::<Settings, _>(Self::on_settings_changed)],
 429            _maintain_buffer_languages: Self::maintain_buffer_languages(&languages, cx),
 430            active_entry: None,
 431            languages,
 432            client,
 433            user_store,
 434            fs,
 435            next_entry_id: Default::default(),
 436            next_diagnostic_group_id: Default::default(),
 437            language_servers: Default::default(),
 438            language_server_ids: Default::default(),
 439            language_server_statuses: Default::default(),
 440            last_workspace_edits_by_language_server: Default::default(),
 441            language_server_settings: Default::default(),
 442            buffers_being_formatted: Default::default(),
 443            next_language_server_id: 0,
 444            nonce: StdRng::from_entropy().gen(),
 445        })
 446    }
 447
 448    pub async fn remote(
 449        remote_id: u64,
 450        client: Arc<Client>,
 451        user_store: ModelHandle<UserStore>,
 452        languages: Arc<LanguageRegistry>,
 453        fs: Arc<dyn Fs>,
 454        mut cx: AsyncAppContext,
 455    ) -> Result<ModelHandle<Self>, JoinProjectError> {
 456        client.authenticate_and_connect(true, &cx).await?;
 457
 458        let subscription = client.subscribe_to_entity(remote_id);
 459        let response = client
 460            .request(proto::JoinProject {
 461                project_id: remote_id,
 462            })
 463            .await?;
 464        let this = cx.add_model(|cx| {
 465            let replica_id = response.replica_id as ReplicaId;
 466
 467            let mut worktrees = Vec::new();
 468            for worktree in response.worktrees {
 469                let worktree = cx.update(|cx| {
 470                    Worktree::remote(remote_id, replica_id, worktree, client.clone(), cx)
 471                });
 472                worktrees.push(worktree);
 473            }
 474
 475            let mut this = Self {
 476                worktrees: Vec::new(),
 477                loading_buffers: Default::default(),
 478                opened_buffer: watch::channel(),
 479                shared_buffers: Default::default(),
 480                incomplete_buffers: Default::default(),
 481                loading_local_worktrees: Default::default(),
 482                active_entry: None,
 483                collaborators: Default::default(),
 484                _maintain_buffer_languages: Self::maintain_buffer_languages(&languages, cx),
 485                languages,
 486                user_store: user_store.clone(),
 487                fs,
 488                next_entry_id: Default::default(),
 489                next_diagnostic_group_id: Default::default(),
 490                client_subscriptions: Default::default(),
 491                _subscriptions: Default::default(),
 492                client: client.clone(),
 493                client_state: Some(ProjectClientState::Remote {
 494                    sharing_has_stopped: false,
 495                    remote_id,
 496                    replica_id,
 497                }),
 498                language_servers: Default::default(),
 499                language_server_ids: Default::default(),
 500                language_server_settings: Default::default(),
 501                language_server_statuses: response
 502                    .language_servers
 503                    .into_iter()
 504                    .map(|server| {
 505                        (
 506                            server.id as usize,
 507                            LanguageServerStatus {
 508                                name: server.name,
 509                                pending_work: Default::default(),
 510                                has_pending_diagnostic_updates: false,
 511                                progress_tokens: Default::default(),
 512                            },
 513                        )
 514                    })
 515                    .collect(),
 516                last_workspace_edits_by_language_server: Default::default(),
 517                next_language_server_id: 0,
 518                opened_buffers: Default::default(),
 519                buffers_being_formatted: Default::default(),
 520                buffer_snapshots: Default::default(),
 521                nonce: StdRng::from_entropy().gen(),
 522            };
 523            for worktree in worktrees {
 524                let _ = this.add_worktree(&worktree, cx);
 525            }
 526            this
 527        });
 528        let subscription = subscription.set_model(&this, &mut cx);
 529
 530        let user_ids = response
 531            .collaborators
 532            .iter()
 533            .map(|peer| peer.user_id)
 534            .collect();
 535        user_store
 536            .update(&mut cx, |user_store, cx| user_store.get_users(user_ids, cx))
 537            .await?;
 538
 539        this.update(&mut cx, |this, cx| {
 540            this.set_collaborators_from_proto(response.collaborators, cx)?;
 541            this.client_subscriptions.push(subscription);
 542            anyhow::Ok(())
 543        })?;
 544
 545        Ok(this)
 546    }
 547
 548    #[cfg(any(test, feature = "test-support"))]
 549    pub async fn test(
 550        fs: Arc<dyn Fs>,
 551        root_paths: impl IntoIterator<Item = &Path>,
 552        cx: &mut gpui::TestAppContext,
 553    ) -> ModelHandle<Project> {
 554        if !cx.read(|cx| cx.has_global::<Settings>()) {
 555            cx.update(|cx| {
 556                cx.set_global(Settings::test(cx));
 557                cx.set_global(HomeDir(Path::new("/tmp/").to_path_buf()))
 558            });
 559        }
 560
 561        let languages = Arc::new(LanguageRegistry::test());
 562        let http_client = client::test::FakeHttpClient::with_404_response();
 563        let client = cx.update(|cx| client::Client::new(http_client.clone(), cx));
 564        let user_store = cx.add_model(|cx| UserStore::new(client.clone(), http_client, cx));
 565        let project = cx.update(|cx| Project::local(client, user_store, languages, fs, cx));
 566        for path in root_paths {
 567            let (tree, _) = project
 568                .update(cx, |project, cx| {
 569                    project.find_or_create_local_worktree(path, true, cx)
 570                })
 571                .await
 572                .unwrap();
 573            tree.read_with(cx, |tree, _| tree.as_local().unwrap().scan_complete())
 574                .await;
 575        }
 576        project
 577    }
 578
 579    fn on_settings_changed(&mut self, cx: &mut ModelContext<Self>) {
 580        let settings = cx.global::<Settings>();
 581
 582        let mut language_servers_to_start = Vec::new();
 583        for buffer in self.opened_buffers.values() {
 584            if let Some(buffer) = buffer.upgrade(cx) {
 585                let buffer = buffer.read(cx);
 586                if let Some((file, language)) = File::from_dyn(buffer.file()).zip(buffer.language())
 587                {
 588                    if settings.enable_language_server(Some(&language.name())) {
 589                        let worktree = file.worktree.read(cx);
 590                        language_servers_to_start.push((
 591                            worktree.id(),
 592                            worktree.as_local().unwrap().abs_path().clone(),
 593                            language.clone(),
 594                        ));
 595                    }
 596                }
 597            }
 598        }
 599
 600        let mut language_servers_to_stop = Vec::new();
 601        for language in self.languages.to_vec() {
 602            if let Some(lsp_adapter) = language.lsp_adapter() {
 603                if !settings.enable_language_server(Some(&language.name())) {
 604                    let lsp_name = &lsp_adapter.name;
 605                    for (worktree_id, started_lsp_name) in self.language_server_ids.keys() {
 606                        if lsp_name == started_lsp_name {
 607                            language_servers_to_stop.push((*worktree_id, started_lsp_name.clone()));
 608                        }
 609                    }
 610                }
 611            }
 612        }
 613
 614        // Stop all newly-disabled language servers.
 615        for (worktree_id, adapter_name) in language_servers_to_stop {
 616            self.stop_language_server(worktree_id, adapter_name, cx)
 617                .detach();
 618        }
 619
 620        // Start all the newly-enabled language servers.
 621        for (worktree_id, worktree_path, language) in language_servers_to_start {
 622            self.start_language_server(worktree_id, worktree_path, language, cx);
 623        }
 624
 625        cx.notify();
 626    }
 627
 628    pub fn buffer_for_id(&self, remote_id: u64, cx: &AppContext) -> Option<ModelHandle<Buffer>> {
 629        self.opened_buffers
 630            .get(&remote_id)
 631            .and_then(|buffer| buffer.upgrade(cx))
 632    }
 633
 634    pub fn languages(&self) -> &Arc<LanguageRegistry> {
 635        &self.languages
 636    }
 637
 638    pub fn client(&self) -> Arc<Client> {
 639        self.client.clone()
 640    }
 641
 642    pub fn user_store(&self) -> ModelHandle<UserStore> {
 643        self.user_store.clone()
 644    }
 645
 646    #[cfg(any(test, feature = "test-support"))]
 647    pub fn check_invariants(&self, cx: &AppContext) {
 648        if self.is_local() {
 649            let mut worktree_root_paths = HashMap::default();
 650            for worktree in self.worktrees(cx) {
 651                let worktree = worktree.read(cx);
 652                let abs_path = worktree.as_local().unwrap().abs_path().clone();
 653                let prev_worktree_id = worktree_root_paths.insert(abs_path.clone(), worktree.id());
 654                assert_eq!(
 655                    prev_worktree_id,
 656                    None,
 657                    "abs path {:?} for worktree {:?} is not unique ({:?} was already registered with the same path)",
 658                    abs_path,
 659                    worktree.id(),
 660                    prev_worktree_id
 661                )
 662            }
 663        } else {
 664            let replica_id = self.replica_id();
 665            for buffer in self.opened_buffers.values() {
 666                if let Some(buffer) = buffer.upgrade(cx) {
 667                    let buffer = buffer.read(cx);
 668                    assert_eq!(
 669                        buffer.deferred_ops_len(),
 670                        0,
 671                        "replica {}, buffer {} has deferred operations",
 672                        replica_id,
 673                        buffer.remote_id()
 674                    );
 675                }
 676            }
 677        }
 678    }
 679
 680    #[cfg(any(test, feature = "test-support"))]
 681    pub fn has_open_buffer(&self, path: impl Into<ProjectPath>, cx: &AppContext) -> bool {
 682        let path = path.into();
 683        if let Some(worktree) = self.worktree_for_id(path.worktree_id, cx) {
 684            self.opened_buffers.iter().any(|(_, buffer)| {
 685                if let Some(buffer) = buffer.upgrade(cx) {
 686                    if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
 687                        if file.worktree == worktree && file.path() == &path.path {
 688                            return true;
 689                        }
 690                    }
 691                }
 692                false
 693            })
 694        } else {
 695            false
 696        }
 697    }
 698
 699    pub fn fs(&self) -> &Arc<dyn Fs> {
 700        &self.fs
 701    }
 702
 703    pub fn remote_id(&self) -> Option<u64> {
 704        match self.client_state.as_ref()? {
 705            ProjectClientState::Local { remote_id, .. }
 706            | ProjectClientState::Remote { remote_id, .. } => Some(*remote_id),
 707        }
 708    }
 709
 710    pub fn replica_id(&self) -> ReplicaId {
 711        match &self.client_state {
 712            Some(ProjectClientState::Remote { replica_id, .. }) => *replica_id,
 713            _ => 0,
 714        }
 715    }
 716
 717    fn metadata_changed(&mut self, cx: &mut ModelContext<Self>) -> impl Future<Output = ()> {
 718        let (tx, rx) = oneshot::channel();
 719        if let Some(ProjectClientState::Local {
 720            metadata_changed, ..
 721        }) = &mut self.client_state
 722        {
 723            let _ = metadata_changed.unbounded_send(tx);
 724        }
 725        cx.notify();
 726
 727        async move {
 728            // If the project is shared, this will resolve when the `_maintain_metadata` task has
 729            // a chance to update the metadata. Otherwise, it will resolve right away because `tx`
 730            // will get dropped.
 731            let _ = rx.await;
 732        }
 733    }
 734
 735    pub fn collaborators(&self) -> &HashMap<proto::PeerId, Collaborator> {
 736        &self.collaborators
 737    }
 738
 739    /// Collect all worktrees, including ones that don't appear in the project panel
 740    pub fn worktrees<'a>(
 741        &'a self,
 742        cx: &'a AppContext,
 743    ) -> impl 'a + DoubleEndedIterator<Item = ModelHandle<Worktree>> {
 744        self.worktrees
 745            .iter()
 746            .filter_map(move |worktree| worktree.upgrade(cx))
 747    }
 748
 749    /// Collect all user-visible worktrees, the ones that appear in the project panel
 750    pub fn visible_worktrees<'a>(
 751        &'a self,
 752        cx: &'a AppContext,
 753    ) -> impl 'a + DoubleEndedIterator<Item = ModelHandle<Worktree>> {
 754        self.worktrees.iter().filter_map(|worktree| {
 755            worktree.upgrade(cx).and_then(|worktree| {
 756                if worktree.read(cx).is_visible() {
 757                    Some(worktree)
 758                } else {
 759                    None
 760                }
 761            })
 762        })
 763    }
 764
 765    pub fn worktree_root_names<'a>(&'a self, cx: &'a AppContext) -> impl Iterator<Item = &'a str> {
 766        self.visible_worktrees(cx)
 767            .map(|tree| tree.read(cx).root_name())
 768    }
 769
 770    pub fn worktree_for_id(
 771        &self,
 772        id: WorktreeId,
 773        cx: &AppContext,
 774    ) -> Option<ModelHandle<Worktree>> {
 775        self.worktrees(cx)
 776            .find(|worktree| worktree.read(cx).id() == id)
 777    }
 778
 779    pub fn worktree_for_entry(
 780        &self,
 781        entry_id: ProjectEntryId,
 782        cx: &AppContext,
 783    ) -> Option<ModelHandle<Worktree>> {
 784        self.worktrees(cx)
 785            .find(|worktree| worktree.read(cx).contains_entry(entry_id))
 786    }
 787
 788    pub fn worktree_id_for_entry(
 789        &self,
 790        entry_id: ProjectEntryId,
 791        cx: &AppContext,
 792    ) -> Option<WorktreeId> {
 793        self.worktree_for_entry(entry_id, cx)
 794            .map(|worktree| worktree.read(cx).id())
 795    }
 796
 797    pub fn contains_paths(&self, paths: &[PathBuf], cx: &AppContext) -> bool {
 798        paths.iter().all(|path| self.contains_path(path, cx))
 799    }
 800
 801    pub fn contains_path(&self, path: &Path, cx: &AppContext) -> bool {
 802        for worktree in self.worktrees(cx) {
 803            let worktree = worktree.read(cx).as_local();
 804            if worktree.map_or(false, |w| w.contains_abs_path(path)) {
 805                return true;
 806            }
 807        }
 808        false
 809    }
 810
 811    pub fn create_entry(
 812        &mut self,
 813        project_path: impl Into<ProjectPath>,
 814        is_directory: bool,
 815        cx: &mut ModelContext<Self>,
 816    ) -> Option<Task<Result<Entry>>> {
 817        let project_path = project_path.into();
 818        let worktree = self.worktree_for_id(project_path.worktree_id, cx)?;
 819        if self.is_local() {
 820            Some(worktree.update(cx, |worktree, cx| {
 821                worktree
 822                    .as_local_mut()
 823                    .unwrap()
 824                    .create_entry(project_path.path, is_directory, cx)
 825            }))
 826        } else {
 827            let client = self.client.clone();
 828            let project_id = self.remote_id().unwrap();
 829            Some(cx.spawn_weak(|_, mut cx| async move {
 830                let response = client
 831                    .request(proto::CreateProjectEntry {
 832                        worktree_id: project_path.worktree_id.to_proto(),
 833                        project_id,
 834                        path: project_path.path.to_string_lossy().into(),
 835                        is_directory,
 836                    })
 837                    .await?;
 838                let entry = response
 839                    .entry
 840                    .ok_or_else(|| anyhow!("missing entry in response"))?;
 841                worktree
 842                    .update(&mut cx, |worktree, cx| {
 843                        worktree.as_remote_mut().unwrap().insert_entry(
 844                            entry,
 845                            response.worktree_scan_id as usize,
 846                            cx,
 847                        )
 848                    })
 849                    .await
 850            }))
 851        }
 852    }
 853
 854    pub fn copy_entry(
 855        &mut self,
 856        entry_id: ProjectEntryId,
 857        new_path: impl Into<Arc<Path>>,
 858        cx: &mut ModelContext<Self>,
 859    ) -> Option<Task<Result<Entry>>> {
 860        let worktree = self.worktree_for_entry(entry_id, cx)?;
 861        let new_path = new_path.into();
 862        if self.is_local() {
 863            worktree.update(cx, |worktree, cx| {
 864                worktree
 865                    .as_local_mut()
 866                    .unwrap()
 867                    .copy_entry(entry_id, new_path, cx)
 868            })
 869        } else {
 870            let client = self.client.clone();
 871            let project_id = self.remote_id().unwrap();
 872
 873            Some(cx.spawn_weak(|_, mut cx| async move {
 874                let response = client
 875                    .request(proto::CopyProjectEntry {
 876                        project_id,
 877                        entry_id: entry_id.to_proto(),
 878                        new_path: new_path.to_string_lossy().into(),
 879                    })
 880                    .await?;
 881                let entry = response
 882                    .entry
 883                    .ok_or_else(|| anyhow!("missing entry in response"))?;
 884                worktree
 885                    .update(&mut cx, |worktree, cx| {
 886                        worktree.as_remote_mut().unwrap().insert_entry(
 887                            entry,
 888                            response.worktree_scan_id as usize,
 889                            cx,
 890                        )
 891                    })
 892                    .await
 893            }))
 894        }
 895    }
 896
 897    pub fn rename_entry(
 898        &mut self,
 899        entry_id: ProjectEntryId,
 900        new_path: impl Into<Arc<Path>>,
 901        cx: &mut ModelContext<Self>,
 902    ) -> Option<Task<Result<Entry>>> {
 903        let worktree = self.worktree_for_entry(entry_id, cx)?;
 904        let new_path = new_path.into();
 905        if self.is_local() {
 906            worktree.update(cx, |worktree, cx| {
 907                worktree
 908                    .as_local_mut()
 909                    .unwrap()
 910                    .rename_entry(entry_id, new_path, cx)
 911            })
 912        } else {
 913            let client = self.client.clone();
 914            let project_id = self.remote_id().unwrap();
 915
 916            Some(cx.spawn_weak(|_, mut cx| async move {
 917                let response = client
 918                    .request(proto::RenameProjectEntry {
 919                        project_id,
 920                        entry_id: entry_id.to_proto(),
 921                        new_path: new_path.to_string_lossy().into(),
 922                    })
 923                    .await?;
 924                let entry = response
 925                    .entry
 926                    .ok_or_else(|| anyhow!("missing entry in response"))?;
 927                worktree
 928                    .update(&mut cx, |worktree, cx| {
 929                        worktree.as_remote_mut().unwrap().insert_entry(
 930                            entry,
 931                            response.worktree_scan_id as usize,
 932                            cx,
 933                        )
 934                    })
 935                    .await
 936            }))
 937        }
 938    }
 939
 940    pub fn delete_entry(
 941        &mut self,
 942        entry_id: ProjectEntryId,
 943        cx: &mut ModelContext<Self>,
 944    ) -> Option<Task<Result<()>>> {
 945        let worktree = self.worktree_for_entry(entry_id, cx)?;
 946        if self.is_local() {
 947            worktree.update(cx, |worktree, cx| {
 948                worktree.as_local_mut().unwrap().delete_entry(entry_id, cx)
 949            })
 950        } else {
 951            let client = self.client.clone();
 952            let project_id = self.remote_id().unwrap();
 953            Some(cx.spawn_weak(|_, mut cx| async move {
 954                let response = client
 955                    .request(proto::DeleteProjectEntry {
 956                        project_id,
 957                        entry_id: entry_id.to_proto(),
 958                    })
 959                    .await?;
 960                worktree
 961                    .update(&mut cx, move |worktree, cx| {
 962                        worktree.as_remote_mut().unwrap().delete_entry(
 963                            entry_id,
 964                            response.worktree_scan_id as usize,
 965                            cx,
 966                        )
 967                    })
 968                    .await
 969            }))
 970        }
 971    }
 972
 973    pub fn shared(&mut self, project_id: u64, cx: &mut ModelContext<Self>) -> Task<Result<()>> {
 974        if self.client_state.is_some() {
 975            return Task::ready(Err(anyhow!("project was already shared")));
 976        }
 977
 978        let mut worktree_share_tasks = Vec::new();
 979
 980        for open_buffer in self.opened_buffers.values_mut() {
 981            match open_buffer {
 982                OpenBuffer::Strong(_) => {}
 983                OpenBuffer::Weak(buffer) => {
 984                    if let Some(buffer) = buffer.upgrade(cx) {
 985                        *open_buffer = OpenBuffer::Strong(buffer);
 986                    }
 987                }
 988                OpenBuffer::Operations(_) => unreachable!(),
 989            }
 990        }
 991
 992        for worktree_handle in self.worktrees.iter_mut() {
 993            match worktree_handle {
 994                WorktreeHandle::Strong(_) => {}
 995                WorktreeHandle::Weak(worktree) => {
 996                    if let Some(worktree) = worktree.upgrade(cx) {
 997                        *worktree_handle = WorktreeHandle::Strong(worktree);
 998                    }
 999                }
1000            }
1001        }
1002
1003        for (server_id, status) in &self.language_server_statuses {
1004            self.client
1005                .send(proto::StartLanguageServer {
1006                    project_id,
1007                    server: Some(proto::LanguageServer {
1008                        id: *server_id as u64,
1009                        name: status.name.clone(),
1010                    }),
1011                })
1012                .log_err();
1013        }
1014
1015        for worktree in self.worktrees(cx).collect::<Vec<_>>() {
1016            worktree.update(cx, |worktree, cx| {
1017                let worktree = worktree.as_local_mut().unwrap();
1018                worktree_share_tasks.push(worktree.share(project_id, cx));
1019            });
1020        }
1021
1022        self.client_subscriptions.push(
1023            self.client
1024                .subscribe_to_entity(project_id)
1025                .set_model(&cx.handle(), &mut cx.to_async()),
1026        );
1027        let _ = self.metadata_changed(cx);
1028        cx.emit(Event::RemoteIdChanged(Some(project_id)));
1029        cx.notify();
1030
1031        let mut status = self.client.status();
1032        let (metadata_changed_tx, mut metadata_changed_rx) = mpsc::unbounded();
1033        self.client_state = Some(ProjectClientState::Local {
1034            remote_id: project_id,
1035            metadata_changed: metadata_changed_tx,
1036            _maintain_metadata: cx.spawn_weak(move |this, cx| async move {
1037                let mut txs = Vec::new();
1038                loop {
1039                    select_biased! {
1040                        tx = metadata_changed_rx.next().fuse() => {
1041                            let Some(tx) = tx else { break };
1042                            txs.push(tx);
1043                            while let Ok(Some(next_tx)) = metadata_changed_rx.try_next() {
1044                                txs.push(next_tx);
1045                            }
1046                        }
1047                        status = status.next().fuse() => {
1048                            let Some(status) = status else { break };
1049                            if !status.is_connected() {
1050                                continue
1051                            }
1052                        }
1053                    }
1054
1055                    let Some(this) = this.upgrade(&cx) else { break };
1056                    this.read_with(&cx, |this, cx| {
1057                        this.client.request(proto::UpdateProject {
1058                            project_id,
1059                            worktrees: this.worktree_metadata_protos(cx),
1060                        })
1061                    })
1062                    .await
1063                    .log_err();
1064
1065                    for tx in txs.drain(..) {
1066                        let _ = tx.send(());
1067                    }
1068                }
1069            }),
1070        });
1071
1072        cx.foreground().spawn(async move {
1073            futures::future::try_join_all(worktree_share_tasks).await?;
1074            Ok(())
1075        })
1076    }
1077
1078    pub fn reshared(
1079        &mut self,
1080        message: proto::ResharedProject,
1081        cx: &mut ModelContext<Self>,
1082    ) -> Result<()> {
1083        self.set_collaborators_from_proto(message.collaborators, cx)?;
1084        Ok(())
1085    }
1086
1087    pub fn rejoined(
1088        &mut self,
1089        message: proto::RejoinedProject,
1090        cx: &mut ModelContext<Self>,
1091    ) -> Result<()> {
1092        self.set_collaborators_from_proto(message.collaborators, cx)?;
1093        Ok(())
1094    }
1095
1096    pub fn worktree_metadata_protos(&self, cx: &AppContext) -> Vec<proto::WorktreeMetadata> {
1097        self.worktrees(cx)
1098            .map(|worktree| {
1099                let worktree = worktree.read(cx);
1100                proto::WorktreeMetadata {
1101                    id: worktree.id().to_proto(),
1102                    root_name: worktree.root_name().into(),
1103                    visible: worktree.is_visible(),
1104                    abs_path: worktree.abs_path().to_string_lossy().into(),
1105                }
1106            })
1107            .collect()
1108    }
1109
1110    pub fn unshare(&mut self, cx: &mut ModelContext<Self>) -> Result<()> {
1111        if self.is_remote() {
1112            return Err(anyhow!("attempted to unshare a remote project"));
1113        }
1114
1115        if let Some(ProjectClientState::Local { remote_id, .. }) = self.client_state.take() {
1116            self.collaborators.clear();
1117            self.shared_buffers.clear();
1118            self.client_subscriptions.clear();
1119
1120            for worktree_handle in self.worktrees.iter_mut() {
1121                if let WorktreeHandle::Strong(worktree) = worktree_handle {
1122                    let is_visible = worktree.update(cx, |worktree, _| {
1123                        worktree.as_local_mut().unwrap().unshare();
1124                        worktree.is_visible()
1125                    });
1126                    if !is_visible {
1127                        *worktree_handle = WorktreeHandle::Weak(worktree.downgrade());
1128                    }
1129                }
1130            }
1131
1132            for open_buffer in self.opened_buffers.values_mut() {
1133                if let OpenBuffer::Strong(buffer) = open_buffer {
1134                    *open_buffer = OpenBuffer::Weak(buffer.downgrade());
1135                }
1136            }
1137
1138            let _ = self.metadata_changed(cx);
1139            cx.notify();
1140            self.client.send(proto::UnshareProject {
1141                project_id: remote_id,
1142            })?;
1143
1144            Ok(())
1145        } else {
1146            Err(anyhow!("attempted to unshare an unshared project"))
1147        }
1148    }
1149
1150    fn disconnected_from_host(&mut self, cx: &mut ModelContext<Self>) {
1151        if let Some(ProjectClientState::Remote {
1152            sharing_has_stopped,
1153            ..
1154        }) = &mut self.client_state
1155        {
1156            *sharing_has_stopped = true;
1157            self.collaborators.clear();
1158            for worktree in &self.worktrees {
1159                if let Some(worktree) = worktree.upgrade(cx) {
1160                    worktree.update(cx, |worktree, _| {
1161                        if let Some(worktree) = worktree.as_remote_mut() {
1162                            worktree.disconnected_from_host();
1163                        }
1164                    });
1165                }
1166            }
1167            cx.emit(Event::DisconnectedFromHost);
1168            cx.notify();
1169
1170            // Wake up all futures currently waiting on a buffer to get opened,
1171            // to give them a chance to fail now that we've disconnected.
1172            *self.opened_buffer.0.borrow_mut() = ();
1173        }
1174    }
1175
1176    pub fn is_read_only(&self) -> bool {
1177        match &self.client_state {
1178            Some(ProjectClientState::Remote {
1179                sharing_has_stopped,
1180                ..
1181            }) => *sharing_has_stopped,
1182            _ => false,
1183        }
1184    }
1185
1186    pub fn is_local(&self) -> bool {
1187        match &self.client_state {
1188            Some(ProjectClientState::Remote { .. }) => false,
1189            _ => true,
1190        }
1191    }
1192
1193    pub fn is_remote(&self) -> bool {
1194        !self.is_local()
1195    }
1196
1197    pub fn create_terminal(
1198        &mut self,
1199        working_directory: Option<PathBuf>,
1200        window_id: usize,
1201        cx: &mut ModelContext<Self>,
1202    ) -> Result<ModelHandle<Terminal>> {
1203        if self.is_remote() {
1204            return Err(anyhow!(
1205                "creating terminals as a guest is not supported yet"
1206            ));
1207        } else {
1208            let settings = cx.global::<Settings>();
1209            let shell = settings.terminal_shell();
1210            let envs = settings.terminal_env();
1211            let scroll = settings.terminal_scroll();
1212
1213            TerminalBuilder::new(
1214                working_directory.clone(),
1215                shell,
1216                envs,
1217                settings.terminal_overrides.blinking.clone(),
1218                scroll,
1219                window_id,
1220            )
1221            .map(|builder| cx.add_model(|cx| builder.subscribe(cx)))
1222        }
1223    }
1224
1225    pub fn create_buffer(
1226        &mut self,
1227        text: &str,
1228        language: Option<Arc<Language>>,
1229        cx: &mut ModelContext<Self>,
1230    ) -> Result<ModelHandle<Buffer>> {
1231        if self.is_remote() {
1232            return Err(anyhow!("creating buffers as a guest is not supported yet"));
1233        }
1234
1235        let buffer = cx.add_model(|cx| {
1236            Buffer::new(self.replica_id(), text, cx)
1237                .with_language(language.unwrap_or_else(|| language::PLAIN_TEXT.clone()), cx)
1238        });
1239        self.register_buffer(&buffer, cx)?;
1240        Ok(buffer)
1241    }
1242
1243    pub fn open_path(
1244        &mut self,
1245        path: impl Into<ProjectPath>,
1246        cx: &mut ModelContext<Self>,
1247    ) -> Task<Result<(ProjectEntryId, AnyModelHandle)>> {
1248        let task = self.open_buffer(path, cx);
1249        cx.spawn_weak(|_, cx| async move {
1250            let buffer = task.await?;
1251            let project_entry_id = buffer
1252                .read_with(&cx, |buffer, cx| {
1253                    File::from_dyn(buffer.file()).and_then(|file| file.project_entry_id(cx))
1254                })
1255                .ok_or_else(|| anyhow!("no project entry"))?;
1256            Ok((project_entry_id, buffer.into()))
1257        })
1258    }
1259
1260    pub fn open_local_buffer(
1261        &mut self,
1262        abs_path: impl AsRef<Path>,
1263        cx: &mut ModelContext<Self>,
1264    ) -> Task<Result<ModelHandle<Buffer>>> {
1265        if let Some((worktree, relative_path)) = self.find_local_worktree(abs_path.as_ref(), cx) {
1266            self.open_buffer((worktree.read(cx).id(), relative_path), cx)
1267        } else {
1268            Task::ready(Err(anyhow!("no such path")))
1269        }
1270    }
1271
1272    pub fn open_buffer(
1273        &mut self,
1274        path: impl Into<ProjectPath>,
1275        cx: &mut ModelContext<Self>,
1276    ) -> Task<Result<ModelHandle<Buffer>>> {
1277        let project_path = path.into();
1278        let worktree = if let Some(worktree) = self.worktree_for_id(project_path.worktree_id, cx) {
1279            worktree
1280        } else {
1281            return Task::ready(Err(anyhow!("no such worktree")));
1282        };
1283
1284        // If there is already a buffer for the given path, then return it.
1285        let existing_buffer = self.get_open_buffer(&project_path, cx);
1286        if let Some(existing_buffer) = existing_buffer {
1287            return Task::ready(Ok(existing_buffer));
1288        }
1289
1290        let mut loading_watch = match self.loading_buffers.entry(project_path.clone()) {
1291            // If the given path is already being loaded, then wait for that existing
1292            // task to complete and return the same buffer.
1293            hash_map::Entry::Occupied(e) => e.get().clone(),
1294
1295            // Otherwise, record the fact that this path is now being loaded.
1296            hash_map::Entry::Vacant(entry) => {
1297                let (mut tx, rx) = postage::watch::channel();
1298                entry.insert(rx.clone());
1299
1300                let load_buffer = if worktree.read(cx).is_local() {
1301                    self.open_local_buffer_internal(&project_path.path, &worktree, cx)
1302                } else {
1303                    self.open_remote_buffer_internal(&project_path.path, &worktree, cx)
1304                };
1305
1306                cx.spawn(move |this, mut cx| async move {
1307                    let load_result = load_buffer.await;
1308                    *tx.borrow_mut() = Some(this.update(&mut cx, |this, _| {
1309                        // Record the fact that the buffer is no longer loading.
1310                        this.loading_buffers.remove(&project_path);
1311                        let buffer = load_result.map_err(Arc::new)?;
1312                        Ok(buffer)
1313                    }));
1314                })
1315                .detach();
1316                rx
1317            }
1318        };
1319
1320        cx.foreground().spawn(async move {
1321            loop {
1322                if let Some(result) = loading_watch.borrow().as_ref() {
1323                    match result {
1324                        Ok(buffer) => return Ok(buffer.clone()),
1325                        Err(error) => return Err(anyhow!("{}", error)),
1326                    }
1327                }
1328                loading_watch.next().await;
1329            }
1330        })
1331    }
1332
1333    fn open_local_buffer_internal(
1334        &mut self,
1335        path: &Arc<Path>,
1336        worktree: &ModelHandle<Worktree>,
1337        cx: &mut ModelContext<Self>,
1338    ) -> Task<Result<ModelHandle<Buffer>>> {
1339        let load_buffer = worktree.update(cx, |worktree, cx| {
1340            let worktree = worktree.as_local_mut().unwrap();
1341            worktree.load_buffer(path, cx)
1342        });
1343        cx.spawn(|this, mut cx| async move {
1344            let buffer = load_buffer.await?;
1345            this.update(&mut cx, |this, cx| this.register_buffer(&buffer, cx))?;
1346            Ok(buffer)
1347        })
1348    }
1349
1350    fn open_remote_buffer_internal(
1351        &mut self,
1352        path: &Arc<Path>,
1353        worktree: &ModelHandle<Worktree>,
1354        cx: &mut ModelContext<Self>,
1355    ) -> Task<Result<ModelHandle<Buffer>>> {
1356        let rpc = self.client.clone();
1357        let project_id = self.remote_id().unwrap();
1358        let remote_worktree_id = worktree.read(cx).id();
1359        let path = path.clone();
1360        let path_string = path.to_string_lossy().to_string();
1361        cx.spawn(|this, mut cx| async move {
1362            let response = rpc
1363                .request(proto::OpenBufferByPath {
1364                    project_id,
1365                    worktree_id: remote_worktree_id.to_proto(),
1366                    path: path_string,
1367                })
1368                .await?;
1369            this.update(&mut cx, |this, cx| {
1370                this.wait_for_buffer(response.buffer_id, cx)
1371            })
1372            .await
1373        })
1374    }
1375
1376    /// LanguageServerName is owned, because it is inserted into a map
1377    fn open_local_buffer_via_lsp(
1378        &mut self,
1379        abs_path: lsp::Url,
1380        language_server_id: usize,
1381        language_server_name: LanguageServerName,
1382        cx: &mut ModelContext<Self>,
1383    ) -> Task<Result<ModelHandle<Buffer>>> {
1384        cx.spawn(|this, mut cx| async move {
1385            let abs_path = abs_path
1386                .to_file_path()
1387                .map_err(|_| anyhow!("can't convert URI to path"))?;
1388            let (worktree, relative_path) = if let Some(result) =
1389                this.read_with(&cx, |this, cx| this.find_local_worktree(&abs_path, cx))
1390            {
1391                result
1392            } else {
1393                let worktree = this
1394                    .update(&mut cx, |this, cx| {
1395                        this.create_local_worktree(&abs_path, false, cx)
1396                    })
1397                    .await?;
1398                this.update(&mut cx, |this, cx| {
1399                    this.language_server_ids.insert(
1400                        (worktree.read(cx).id(), language_server_name),
1401                        language_server_id,
1402                    );
1403                });
1404                (worktree, PathBuf::new())
1405            };
1406
1407            let project_path = ProjectPath {
1408                worktree_id: worktree.read_with(&cx, |worktree, _| worktree.id()),
1409                path: relative_path.into(),
1410            };
1411            this.update(&mut cx, |this, cx| this.open_buffer(project_path, cx))
1412                .await
1413        })
1414    }
1415
1416    pub fn open_buffer_by_id(
1417        &mut self,
1418        id: u64,
1419        cx: &mut ModelContext<Self>,
1420    ) -> Task<Result<ModelHandle<Buffer>>> {
1421        if let Some(buffer) = self.buffer_for_id(id, cx) {
1422            Task::ready(Ok(buffer))
1423        } else if self.is_local() {
1424            Task::ready(Err(anyhow!("buffer {} does not exist", id)))
1425        } else if let Some(project_id) = self.remote_id() {
1426            let request = self
1427                .client
1428                .request(proto::OpenBufferById { project_id, id });
1429            cx.spawn(|this, mut cx| async move {
1430                let buffer_id = request.await?.buffer_id;
1431                this.update(&mut cx, |this, cx| this.wait_for_buffer(buffer_id, cx))
1432                    .await
1433            })
1434        } else {
1435            Task::ready(Err(anyhow!("cannot open buffer while disconnected")))
1436        }
1437    }
1438
1439    pub fn save_buffer_as(
1440        &mut self,
1441        buffer: ModelHandle<Buffer>,
1442        abs_path: PathBuf,
1443        cx: &mut ModelContext<Project>,
1444    ) -> Task<Result<()>> {
1445        let worktree_task = self.find_or_create_local_worktree(&abs_path, true, cx);
1446        let old_path =
1447            File::from_dyn(buffer.read(cx).file()).and_then(|f| Some(f.as_local()?.abs_path(cx)));
1448        cx.spawn(|this, mut cx| async move {
1449            if let Some(old_path) = old_path {
1450                this.update(&mut cx, |this, cx| {
1451                    this.unregister_buffer_from_language_server(&buffer, old_path, cx);
1452                });
1453            }
1454            let (worktree, path) = worktree_task.await?;
1455            worktree
1456                .update(&mut cx, |worktree, cx| {
1457                    worktree
1458                        .as_local_mut()
1459                        .unwrap()
1460                        .save_buffer_as(buffer.clone(), path, cx)
1461                })
1462                .await?;
1463            this.update(&mut cx, |this, cx| {
1464                this.assign_language_to_buffer(&buffer, cx);
1465                this.register_buffer_with_language_server(&buffer, cx);
1466            });
1467            Ok(())
1468        })
1469    }
1470
1471    pub fn get_open_buffer(
1472        &mut self,
1473        path: &ProjectPath,
1474        cx: &mut ModelContext<Self>,
1475    ) -> Option<ModelHandle<Buffer>> {
1476        let worktree = self.worktree_for_id(path.worktree_id, cx)?;
1477        self.opened_buffers.values().find_map(|buffer| {
1478            let buffer = buffer.upgrade(cx)?;
1479            let file = File::from_dyn(buffer.read(cx).file())?;
1480            if file.worktree == worktree && file.path() == &path.path {
1481                Some(buffer)
1482            } else {
1483                None
1484            }
1485        })
1486    }
1487
1488    fn register_buffer(
1489        &mut self,
1490        buffer: &ModelHandle<Buffer>,
1491        cx: &mut ModelContext<Self>,
1492    ) -> Result<()> {
1493        let remote_id = buffer.read(cx).remote_id();
1494        let open_buffer = if self.is_remote() || self.is_shared() {
1495            OpenBuffer::Strong(buffer.clone())
1496        } else {
1497            OpenBuffer::Weak(buffer.downgrade())
1498        };
1499
1500        match self.opened_buffers.insert(remote_id, open_buffer) {
1501            None => {}
1502            Some(OpenBuffer::Operations(operations)) => {
1503                buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx))?
1504            }
1505            Some(OpenBuffer::Weak(existing_handle)) => {
1506                if existing_handle.upgrade(cx).is_some() {
1507                    Err(anyhow!(
1508                        "already registered buffer with remote id {}",
1509                        remote_id
1510                    ))?
1511                }
1512            }
1513            Some(OpenBuffer::Strong(_)) => Err(anyhow!(
1514                "already registered buffer with remote id {}",
1515                remote_id
1516            ))?,
1517        }
1518        cx.subscribe(buffer, |this, buffer, event, cx| {
1519            this.on_buffer_event(buffer, event, cx);
1520        })
1521        .detach();
1522
1523        self.assign_language_to_buffer(buffer, cx);
1524        self.register_buffer_with_language_server(buffer, cx);
1525        cx.observe_release(buffer, |this, buffer, cx| {
1526            if let Some(file) = File::from_dyn(buffer.file()) {
1527                if file.is_local() {
1528                    let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
1529                    if let Some((_, server)) = this.language_server_for_buffer(buffer, cx) {
1530                        server
1531                            .notify::<lsp::notification::DidCloseTextDocument>(
1532                                lsp::DidCloseTextDocumentParams {
1533                                    text_document: lsp::TextDocumentIdentifier::new(uri),
1534                                },
1535                            )
1536                            .log_err();
1537                    }
1538                }
1539            }
1540        })
1541        .detach();
1542
1543        *self.opened_buffer.0.borrow_mut() = ();
1544        Ok(())
1545    }
1546
1547    fn register_buffer_with_language_server(
1548        &mut self,
1549        buffer_handle: &ModelHandle<Buffer>,
1550        cx: &mut ModelContext<Self>,
1551    ) {
1552        let buffer = buffer_handle.read(cx);
1553        let buffer_id = buffer.remote_id();
1554        if let Some(file) = File::from_dyn(buffer.file()) {
1555            if file.is_local() {
1556                let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
1557                let initial_snapshot = buffer.text_snapshot();
1558
1559                let mut language_server = None;
1560                let mut language_id = None;
1561                if let Some(language) = buffer.language() {
1562                    let worktree_id = file.worktree_id(cx);
1563                    if let Some(adapter) = language.lsp_adapter() {
1564                        language_id = adapter.language_ids.get(language.name().as_ref()).cloned();
1565                        language_server = self
1566                            .language_server_ids
1567                            .get(&(worktree_id, adapter.name.clone()))
1568                            .and_then(|id| self.language_servers.get(id))
1569                            .and_then(|server_state| {
1570                                if let LanguageServerState::Running { server, .. } = server_state {
1571                                    Some(server.clone())
1572                                } else {
1573                                    None
1574                                }
1575                            });
1576                    }
1577                }
1578
1579                if let Some(local_worktree) = file.worktree.read(cx).as_local() {
1580                    if let Some(diagnostics) = local_worktree.diagnostics_for_path(file.path()) {
1581                        self.update_buffer_diagnostics(buffer_handle, diagnostics, None, cx)
1582                            .log_err();
1583                    }
1584                }
1585
1586                if let Some(server) = language_server {
1587                    server
1588                        .notify::<lsp::notification::DidOpenTextDocument>(
1589                            lsp::DidOpenTextDocumentParams {
1590                                text_document: lsp::TextDocumentItem::new(
1591                                    uri,
1592                                    language_id.unwrap_or_default(),
1593                                    0,
1594                                    initial_snapshot.text(),
1595                                ),
1596                            },
1597                        )
1598                        .log_err();
1599                    buffer_handle.update(cx, |buffer, cx| {
1600                        buffer.set_completion_triggers(
1601                            server
1602                                .capabilities()
1603                                .completion_provider
1604                                .as_ref()
1605                                .and_then(|provider| provider.trigger_characters.clone())
1606                                .unwrap_or_default(),
1607                            cx,
1608                        )
1609                    });
1610                    self.buffer_snapshots
1611                        .insert(buffer_id, vec![(0, initial_snapshot)]);
1612                }
1613            }
1614        }
1615    }
1616
1617    fn unregister_buffer_from_language_server(
1618        &mut self,
1619        buffer: &ModelHandle<Buffer>,
1620        old_path: PathBuf,
1621        cx: &mut ModelContext<Self>,
1622    ) {
1623        buffer.update(cx, |buffer, cx| {
1624            buffer.update_diagnostics(Default::default(), cx);
1625            self.buffer_snapshots.remove(&buffer.remote_id());
1626            if let Some((_, language_server)) = self.language_server_for_buffer(buffer, cx) {
1627                language_server
1628                    .notify::<lsp::notification::DidCloseTextDocument>(
1629                        lsp::DidCloseTextDocumentParams {
1630                            text_document: lsp::TextDocumentIdentifier::new(
1631                                lsp::Url::from_file_path(old_path).unwrap(),
1632                            ),
1633                        },
1634                    )
1635                    .log_err();
1636            }
1637        });
1638    }
1639
1640    fn on_buffer_event(
1641        &mut self,
1642        buffer: ModelHandle<Buffer>,
1643        event: &BufferEvent,
1644        cx: &mut ModelContext<Self>,
1645    ) -> Option<()> {
1646        match event {
1647            BufferEvent::Operation(operation) => {
1648                if let Some(project_id) = self.remote_id() {
1649                    let request = self.client.request(proto::UpdateBuffer {
1650                        project_id,
1651                        buffer_id: buffer.read(cx).remote_id(),
1652                        operations: vec![language::proto::serialize_operation(operation)],
1653                    });
1654                    cx.background().spawn(request).detach_and_log_err(cx);
1655                }
1656            }
1657            BufferEvent::Edited { .. } => {
1658                let language_server = self
1659                    .language_server_for_buffer(buffer.read(cx), cx)
1660                    .map(|(_, server)| server.clone())?;
1661                let buffer = buffer.read(cx);
1662                let file = File::from_dyn(buffer.file())?;
1663                let abs_path = file.as_local()?.abs_path(cx);
1664                let uri = lsp::Url::from_file_path(abs_path).unwrap();
1665                let buffer_snapshots = self.buffer_snapshots.get_mut(&buffer.remote_id())?;
1666                let (version, prev_snapshot) = buffer_snapshots.last()?;
1667                let next_snapshot = buffer.text_snapshot();
1668                let next_version = version + 1;
1669
1670                let content_changes = buffer
1671                    .edits_since::<(PointUtf16, usize)>(prev_snapshot.version())
1672                    .map(|edit| {
1673                        let edit_start = edit.new.start.0;
1674                        let edit_end = edit_start + (edit.old.end.0 - edit.old.start.0);
1675                        let new_text = next_snapshot
1676                            .text_for_range(edit.new.start.1..edit.new.end.1)
1677                            .collect();
1678                        lsp::TextDocumentContentChangeEvent {
1679                            range: Some(lsp::Range::new(
1680                                point_to_lsp(edit_start),
1681                                point_to_lsp(edit_end),
1682                            )),
1683                            range_length: None,
1684                            text: new_text,
1685                        }
1686                    })
1687                    .collect();
1688
1689                buffer_snapshots.push((next_version, next_snapshot));
1690
1691                language_server
1692                    .notify::<lsp::notification::DidChangeTextDocument>(
1693                        lsp::DidChangeTextDocumentParams {
1694                            text_document: lsp::VersionedTextDocumentIdentifier::new(
1695                                uri,
1696                                next_version,
1697                            ),
1698                            content_changes,
1699                        },
1700                    )
1701                    .log_err();
1702            }
1703            BufferEvent::Saved => {
1704                let file = File::from_dyn(buffer.read(cx).file())?;
1705                let worktree_id = file.worktree_id(cx);
1706                let abs_path = file.as_local()?.abs_path(cx);
1707                let text_document = lsp::TextDocumentIdentifier {
1708                    uri: lsp::Url::from_file_path(abs_path).unwrap(),
1709                };
1710
1711                for (_, _, server) in self.language_servers_for_worktree(worktree_id) {
1712                    server
1713                        .notify::<lsp::notification::DidSaveTextDocument>(
1714                            lsp::DidSaveTextDocumentParams {
1715                                text_document: text_document.clone(),
1716                                text: None,
1717                            },
1718                        )
1719                        .log_err();
1720                }
1721
1722                // After saving a buffer, simulate disk-based diagnostics being finished for languages
1723                // that don't support a disk-based progress token.
1724                let (lsp_adapter, language_server) =
1725                    self.language_server_for_buffer(buffer.read(cx), cx)?;
1726                if lsp_adapter.disk_based_diagnostics_progress_token.is_none() {
1727                    let server_id = language_server.server_id();
1728                    self.disk_based_diagnostics_finished(server_id, cx);
1729                    self.broadcast_language_server_update(
1730                        server_id,
1731                        proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(
1732                            proto::LspDiskBasedDiagnosticsUpdated {},
1733                        ),
1734                    );
1735                }
1736            }
1737            _ => {}
1738        }
1739
1740        None
1741    }
1742
1743    fn language_servers_for_worktree(
1744        &self,
1745        worktree_id: WorktreeId,
1746    ) -> impl Iterator<Item = (&Arc<CachedLspAdapter>, &Arc<Language>, &Arc<LanguageServer>)> {
1747        self.language_server_ids
1748            .iter()
1749            .filter_map(move |((language_server_worktree_id, _), id)| {
1750                if *language_server_worktree_id == worktree_id {
1751                    if let Some(LanguageServerState::Running {
1752                        adapter,
1753                        language,
1754                        server,
1755                    }) = self.language_servers.get(id)
1756                    {
1757                        return Some((adapter, language, server));
1758                    }
1759                }
1760                None
1761            })
1762    }
1763
1764    fn maintain_buffer_languages(
1765        languages: &LanguageRegistry,
1766        cx: &mut ModelContext<Project>,
1767    ) -> Task<()> {
1768        let mut subscription = languages.subscribe();
1769        cx.spawn_weak(|project, mut cx| async move {
1770            while let Some(()) = subscription.next().await {
1771                if let Some(project) = project.upgrade(&cx) {
1772                    project.update(&mut cx, |project, cx| {
1773                        let mut buffers_without_language = Vec::new();
1774                        for buffer in project.opened_buffers.values() {
1775                            if let Some(buffer) = buffer.upgrade(cx) {
1776                                if buffer.read(cx).language().is_none() {
1777                                    buffers_without_language.push(buffer);
1778                                }
1779                            }
1780                        }
1781
1782                        for buffer in buffers_without_language {
1783                            project.assign_language_to_buffer(&buffer, cx);
1784                            project.register_buffer_with_language_server(&buffer, cx);
1785                        }
1786                    });
1787                }
1788            }
1789        })
1790    }
1791
1792    fn assign_language_to_buffer(
1793        &mut self,
1794        buffer: &ModelHandle<Buffer>,
1795        cx: &mut ModelContext<Self>,
1796    ) -> Option<()> {
1797        // If the buffer has a language, set it and start the language server if we haven't already.
1798        let full_path = buffer.read(cx).file()?.full_path(cx);
1799        let new_language = self.languages.select_language(&full_path)?;
1800        buffer.update(cx, |buffer, cx| {
1801            if buffer.language().map_or(true, |old_language| {
1802                !Arc::ptr_eq(old_language, &new_language)
1803            }) {
1804                buffer.set_language_registry(self.languages.clone());
1805                buffer.set_language(Some(new_language.clone()), cx);
1806            }
1807        });
1808
1809        let file = File::from_dyn(buffer.read(cx).file())?;
1810        let worktree = file.worktree.read(cx).as_local()?;
1811        let worktree_id = worktree.id();
1812        let worktree_abs_path = worktree.abs_path().clone();
1813        self.start_language_server(worktree_id, worktree_abs_path, new_language, cx);
1814
1815        None
1816    }
1817
1818    fn merge_json_value_into(source: serde_json::Value, target: &mut serde_json::Value) {
1819        use serde_json::Value;
1820
1821        match (source, target) {
1822            (Value::Object(source), Value::Object(target)) => {
1823                for (key, value) in source {
1824                    if let Some(target) = target.get_mut(&key) {
1825                        Self::merge_json_value_into(value, target);
1826                    } else {
1827                        target.insert(key.clone(), value);
1828                    }
1829                }
1830            }
1831
1832            (source, target) => *target = source,
1833        }
1834    }
1835
1836    fn start_language_server(
1837        &mut self,
1838        worktree_id: WorktreeId,
1839        worktree_path: Arc<Path>,
1840        language: Arc<Language>,
1841        cx: &mut ModelContext<Self>,
1842    ) {
1843        if !cx
1844            .global::<Settings>()
1845            .enable_language_server(Some(&language.name()))
1846        {
1847            return;
1848        }
1849
1850        let adapter = if let Some(adapter) = language.lsp_adapter() {
1851            adapter
1852        } else {
1853            return;
1854        };
1855        let key = (worktree_id, adapter.name.clone());
1856
1857        let mut initialization_options = adapter.initialization_options.clone();
1858
1859        let lsp = &cx.global::<Settings>().lsp.get(&adapter.name.0);
1860        let override_options = lsp.map(|s| s.initialization_options.clone()).flatten();
1861        match (&mut initialization_options, override_options) {
1862            (Some(initialization_options), Some(override_options)) => {
1863                Self::merge_json_value_into(override_options, initialization_options);
1864            }
1865
1866            (None, override_options) => initialization_options = override_options,
1867
1868            _ => {}
1869        }
1870
1871        self.language_server_ids
1872            .entry(key.clone())
1873            .or_insert_with(|| {
1874                let server_id = post_inc(&mut self.next_language_server_id);
1875                let language_server = self.languages.start_language_server(
1876                    server_id,
1877                    language.clone(),
1878                    worktree_path,
1879                    self.client.http_client(),
1880                    cx,
1881                );
1882                self.language_servers.insert(
1883                    server_id,
1884                    LanguageServerState::Starting(cx.spawn_weak(|this, mut cx| async move {
1885                        let language_server = language_server?.await.log_err()?;
1886                        let language_server = language_server
1887                            .initialize(initialization_options)
1888                            .await
1889                            .log_err()?;
1890                        let this = this.upgrade(&cx)?;
1891
1892                        language_server
1893                            .on_notification::<lsp::notification::PublishDiagnostics, _>({
1894                                let this = this.downgrade();
1895                                let adapter = adapter.clone();
1896                                move |mut params, cx| {
1897                                    let this = this;
1898                                    let adapter = adapter.clone();
1899                                    cx.spawn(|mut cx| async move {
1900                                        adapter.process_diagnostics(&mut params).await;
1901                                        if let Some(this) = this.upgrade(&cx) {
1902                                            this.update(&mut cx, |this, cx| {
1903                                                this.update_diagnostics(
1904                                                    server_id,
1905                                                    params,
1906                                                    &adapter.disk_based_diagnostic_sources,
1907                                                    cx,
1908                                                )
1909                                                .log_err();
1910                                            });
1911                                        }
1912                                    })
1913                                    .detach();
1914                                }
1915                            })
1916                            .detach();
1917
1918                        language_server
1919                            .on_request::<lsp::request::WorkspaceConfiguration, _, _>({
1920                                let settings = this.read_with(&cx, |this, _| {
1921                                    this.language_server_settings.clone()
1922                                });
1923                                move |params, _| {
1924                                    let settings = settings.lock().clone();
1925                                    async move {
1926                                        Ok(params
1927                                            .items
1928                                            .into_iter()
1929                                            .map(|item| {
1930                                                if let Some(section) = &item.section {
1931                                                    settings
1932                                                        .get(section)
1933                                                        .cloned()
1934                                                        .unwrap_or(serde_json::Value::Null)
1935                                                } else {
1936                                                    settings.clone()
1937                                                }
1938                                            })
1939                                            .collect())
1940                                    }
1941                                }
1942                            })
1943                            .detach();
1944
1945                        // Even though we don't have handling for these requests, respond to them to
1946                        // avoid stalling any language server like `gopls` which waits for a response
1947                        // to these requests when initializing.
1948                        language_server
1949                            .on_request::<lsp::request::WorkDoneProgressCreate, _, _>({
1950                                let this = this.downgrade();
1951                                move |params, mut cx| async move {
1952                                    if let Some(this) = this.upgrade(&cx) {
1953                                        this.update(&mut cx, |this, _| {
1954                                            if let Some(status) =
1955                                                this.language_server_statuses.get_mut(&server_id)
1956                                            {
1957                                                if let lsp::NumberOrString::String(token) =
1958                                                    params.token
1959                                                {
1960                                                    status.progress_tokens.insert(token);
1961                                                }
1962                                            }
1963                                        });
1964                                    }
1965                                    Ok(())
1966                                }
1967                            })
1968                            .detach();
1969                        language_server
1970                            .on_request::<lsp::request::RegisterCapability, _, _>(|_, _| async {
1971                                Ok(())
1972                            })
1973                            .detach();
1974
1975                        language_server
1976                            .on_request::<lsp::request::ApplyWorkspaceEdit, _, _>({
1977                                let this = this.downgrade();
1978                                let adapter = adapter.clone();
1979                                let language_server = language_server.clone();
1980                                move |params, cx| {
1981                                    Self::on_lsp_workspace_edit(
1982                                        this,
1983                                        params,
1984                                        server_id,
1985                                        adapter.clone(),
1986                                        language_server.clone(),
1987                                        cx,
1988                                    )
1989                                }
1990                            })
1991                            .detach();
1992
1993                        let disk_based_diagnostics_progress_token =
1994                            adapter.disk_based_diagnostics_progress_token.clone();
1995
1996                        language_server
1997                            .on_notification::<lsp::notification::Progress, _>({
1998                                let this = this.downgrade();
1999                                move |params, mut cx| {
2000                                    if let Some(this) = this.upgrade(&cx) {
2001                                        this.update(&mut cx, |this, cx| {
2002                                            this.on_lsp_progress(
2003                                                params,
2004                                                server_id,
2005                                                disk_based_diagnostics_progress_token.clone(),
2006                                                cx,
2007                                            );
2008                                        });
2009                                    }
2010                                }
2011                            })
2012                            .detach();
2013
2014                        this.update(&mut cx, |this, cx| {
2015                            // If the language server for this key doesn't match the server id, don't store the
2016                            // server. Which will cause it to be dropped, killing the process
2017                            if this
2018                                .language_server_ids
2019                                .get(&key)
2020                                .map(|id| id != &server_id)
2021                                .unwrap_or(false)
2022                            {
2023                                return None;
2024                            }
2025
2026                            // Update language_servers collection with Running variant of LanguageServerState
2027                            // indicating that the server is up and running and ready
2028                            this.language_servers.insert(
2029                                server_id,
2030                                LanguageServerState::Running {
2031                                    adapter: adapter.clone(),
2032                                    language,
2033                                    server: language_server.clone(),
2034                                },
2035                            );
2036                            this.language_server_statuses.insert(
2037                                server_id,
2038                                LanguageServerStatus {
2039                                    name: language_server.name().to_string(),
2040                                    pending_work: Default::default(),
2041                                    has_pending_diagnostic_updates: false,
2042                                    progress_tokens: Default::default(),
2043                                },
2044                            );
2045                            language_server
2046                                .notify::<lsp::notification::DidChangeConfiguration>(
2047                                    lsp::DidChangeConfigurationParams {
2048                                        settings: this.language_server_settings.lock().clone(),
2049                                    },
2050                                )
2051                                .ok();
2052
2053                            if let Some(project_id) = this.remote_id() {
2054                                this.client
2055                                    .send(proto::StartLanguageServer {
2056                                        project_id,
2057                                        server: Some(proto::LanguageServer {
2058                                            id: server_id as u64,
2059                                            name: language_server.name().to_string(),
2060                                        }),
2061                                    })
2062                                    .log_err();
2063                            }
2064
2065                            // Tell the language server about every open buffer in the worktree that matches the language.
2066                            for buffer in this.opened_buffers.values() {
2067                                if let Some(buffer_handle) = buffer.upgrade(cx) {
2068                                    let buffer = buffer_handle.read(cx);
2069                                    let file = if let Some(file) = File::from_dyn(buffer.file()) {
2070                                        file
2071                                    } else {
2072                                        continue;
2073                                    };
2074                                    let language = if let Some(language) = buffer.language() {
2075                                        language
2076                                    } else {
2077                                        continue;
2078                                    };
2079                                    if file.worktree.read(cx).id() != key.0
2080                                        || language.lsp_adapter().map(|a| a.name.clone())
2081                                            != Some(key.1.clone())
2082                                    {
2083                                        continue;
2084                                    }
2085
2086                                    let file = file.as_local()?;
2087                                    let versions = this
2088                                        .buffer_snapshots
2089                                        .entry(buffer.remote_id())
2090                                        .or_insert_with(|| vec![(0, buffer.text_snapshot())]);
2091                                    let (version, initial_snapshot) = versions.last().unwrap();
2092                                    let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
2093                                    language_server
2094                                        .notify::<lsp::notification::DidOpenTextDocument>(
2095                                            lsp::DidOpenTextDocumentParams {
2096                                                text_document: lsp::TextDocumentItem::new(
2097                                                    uri,
2098                                                    adapter
2099                                                        .language_ids
2100                                                        .get(language.name().as_ref())
2101                                                        .cloned()
2102                                                        .unwrap_or_default(),
2103                                                    *version,
2104                                                    initial_snapshot.text(),
2105                                                ),
2106                                            },
2107                                        )
2108                                        .log_err()?;
2109                                    buffer_handle.update(cx, |buffer, cx| {
2110                                        buffer.set_completion_triggers(
2111                                            language_server
2112                                                .capabilities()
2113                                                .completion_provider
2114                                                .as_ref()
2115                                                .and_then(|provider| {
2116                                                    provider.trigger_characters.clone()
2117                                                })
2118                                                .unwrap_or_default(),
2119                                            cx,
2120                                        )
2121                                    });
2122                                }
2123                            }
2124
2125                            cx.notify();
2126                            Some(language_server)
2127                        })
2128                    })),
2129                );
2130
2131                server_id
2132            });
2133    }
2134
2135    // Returns a list of all of the worktrees which no longer have a language server and the root path
2136    // for the stopped server
2137    fn stop_language_server(
2138        &mut self,
2139        worktree_id: WorktreeId,
2140        adapter_name: LanguageServerName,
2141        cx: &mut ModelContext<Self>,
2142    ) -> Task<(Option<PathBuf>, Vec<WorktreeId>)> {
2143        let key = (worktree_id, adapter_name);
2144        if let Some(server_id) = self.language_server_ids.remove(&key) {
2145            // Remove other entries for this language server as well
2146            let mut orphaned_worktrees = vec![worktree_id];
2147            let other_keys = self.language_server_ids.keys().cloned().collect::<Vec<_>>();
2148            for other_key in other_keys {
2149                if self.language_server_ids.get(&other_key) == Some(&server_id) {
2150                    self.language_server_ids.remove(&other_key);
2151                    orphaned_worktrees.push(other_key.0);
2152                }
2153            }
2154
2155            self.language_server_statuses.remove(&server_id);
2156            cx.notify();
2157
2158            let server_state = self.language_servers.remove(&server_id);
2159            cx.spawn_weak(|this, mut cx| async move {
2160                let mut root_path = None;
2161
2162                let server = match server_state {
2163                    Some(LanguageServerState::Starting(started_language_server)) => {
2164                        started_language_server.await
2165                    }
2166                    Some(LanguageServerState::Running { server, .. }) => Some(server),
2167                    None => None,
2168                };
2169
2170                if let Some(server) = server {
2171                    root_path = Some(server.root_path().clone());
2172                    if let Some(shutdown) = server.shutdown() {
2173                        shutdown.await;
2174                    }
2175                }
2176
2177                if let Some(this) = this.upgrade(&cx) {
2178                    this.update(&mut cx, |this, cx| {
2179                        this.language_server_statuses.remove(&server_id);
2180                        cx.notify();
2181                    });
2182                }
2183
2184                (root_path, orphaned_worktrees)
2185            })
2186        } else {
2187            Task::ready((None, Vec::new()))
2188        }
2189    }
2190
2191    pub fn restart_language_servers_for_buffers(
2192        &mut self,
2193        buffers: impl IntoIterator<Item = ModelHandle<Buffer>>,
2194        cx: &mut ModelContext<Self>,
2195    ) -> Option<()> {
2196        let language_server_lookup_info: HashSet<(WorktreeId, Arc<Path>, PathBuf)> = buffers
2197            .into_iter()
2198            .filter_map(|buffer| {
2199                let file = File::from_dyn(buffer.read(cx).file())?;
2200                let worktree = file.worktree.read(cx).as_local()?;
2201                let worktree_id = worktree.id();
2202                let worktree_abs_path = worktree.abs_path().clone();
2203                let full_path = file.full_path(cx);
2204                Some((worktree_id, worktree_abs_path, full_path))
2205            })
2206            .collect();
2207        for (worktree_id, worktree_abs_path, full_path) in language_server_lookup_info {
2208            let language = self.languages.select_language(&full_path)?;
2209            self.restart_language_server(worktree_id, worktree_abs_path, language, cx);
2210        }
2211
2212        None
2213    }
2214
2215    fn restart_language_server(
2216        &mut self,
2217        worktree_id: WorktreeId,
2218        fallback_path: Arc<Path>,
2219        language: Arc<Language>,
2220        cx: &mut ModelContext<Self>,
2221    ) {
2222        let adapter = if let Some(adapter) = language.lsp_adapter() {
2223            adapter
2224        } else {
2225            return;
2226        };
2227
2228        let server_name = adapter.name.clone();
2229        let stop = self.stop_language_server(worktree_id, server_name.clone(), cx);
2230        cx.spawn_weak(|this, mut cx| async move {
2231            let (original_root_path, orphaned_worktrees) = stop.await;
2232            if let Some(this) = this.upgrade(&cx) {
2233                this.update(&mut cx, |this, cx| {
2234                    // Attempt to restart using original server path. Fallback to passed in
2235                    // path if we could not retrieve the root path
2236                    let root_path = original_root_path
2237                        .map(|path_buf| Arc::from(path_buf.as_path()))
2238                        .unwrap_or(fallback_path);
2239
2240                    this.start_language_server(worktree_id, root_path, language, cx);
2241
2242                    // Lookup new server id and set it for each of the orphaned worktrees
2243                    if let Some(new_server_id) = this
2244                        .language_server_ids
2245                        .get(&(worktree_id, server_name.clone()))
2246                        .cloned()
2247                    {
2248                        for orphaned_worktree in orphaned_worktrees {
2249                            this.language_server_ids
2250                                .insert((orphaned_worktree, server_name.clone()), new_server_id);
2251                        }
2252                    }
2253                });
2254            }
2255        })
2256        .detach();
2257    }
2258
2259    fn on_lsp_progress(
2260        &mut self,
2261        progress: lsp::ProgressParams,
2262        server_id: usize,
2263        disk_based_diagnostics_progress_token: Option<String>,
2264        cx: &mut ModelContext<Self>,
2265    ) {
2266        let token = match progress.token {
2267            lsp::NumberOrString::String(token) => token,
2268            lsp::NumberOrString::Number(token) => {
2269                log::info!("skipping numeric progress token {}", token);
2270                return;
2271            }
2272        };
2273        let lsp::ProgressParamsValue::WorkDone(progress) = progress.value;
2274        let language_server_status =
2275            if let Some(status) = self.language_server_statuses.get_mut(&server_id) {
2276                status
2277            } else {
2278                return;
2279            };
2280
2281        if !language_server_status.progress_tokens.contains(&token) {
2282            return;
2283        }
2284
2285        let is_disk_based_diagnostics_progress = disk_based_diagnostics_progress_token
2286            .as_ref()
2287            .map_or(false, |disk_based_token| {
2288                token.starts_with(disk_based_token)
2289            });
2290
2291        match progress {
2292            lsp::WorkDoneProgress::Begin(report) => {
2293                if is_disk_based_diagnostics_progress {
2294                    language_server_status.has_pending_diagnostic_updates = true;
2295                    self.disk_based_diagnostics_started(server_id, cx);
2296                    self.broadcast_language_server_update(
2297                        server_id,
2298                        proto::update_language_server::Variant::DiskBasedDiagnosticsUpdating(
2299                            proto::LspDiskBasedDiagnosticsUpdating {},
2300                        ),
2301                    );
2302                } else {
2303                    self.on_lsp_work_start(
2304                        server_id,
2305                        token.clone(),
2306                        LanguageServerProgress {
2307                            message: report.message.clone(),
2308                            percentage: report.percentage.map(|p| p as usize),
2309                            last_update_at: Instant::now(),
2310                        },
2311                        cx,
2312                    );
2313                    self.broadcast_language_server_update(
2314                        server_id,
2315                        proto::update_language_server::Variant::WorkStart(proto::LspWorkStart {
2316                            token,
2317                            message: report.message,
2318                            percentage: report.percentage.map(|p| p as u32),
2319                        }),
2320                    );
2321                }
2322            }
2323            lsp::WorkDoneProgress::Report(report) => {
2324                if !is_disk_based_diagnostics_progress {
2325                    self.on_lsp_work_progress(
2326                        server_id,
2327                        token.clone(),
2328                        LanguageServerProgress {
2329                            message: report.message.clone(),
2330                            percentage: report.percentage.map(|p| p as usize),
2331                            last_update_at: Instant::now(),
2332                        },
2333                        cx,
2334                    );
2335                    self.broadcast_language_server_update(
2336                        server_id,
2337                        proto::update_language_server::Variant::WorkProgress(
2338                            proto::LspWorkProgress {
2339                                token,
2340                                message: report.message,
2341                                percentage: report.percentage.map(|p| p as u32),
2342                            },
2343                        ),
2344                    );
2345                }
2346            }
2347            lsp::WorkDoneProgress::End(_) => {
2348                language_server_status.progress_tokens.remove(&token);
2349
2350                if is_disk_based_diagnostics_progress {
2351                    language_server_status.has_pending_diagnostic_updates = false;
2352                    self.disk_based_diagnostics_finished(server_id, cx);
2353                    self.broadcast_language_server_update(
2354                        server_id,
2355                        proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(
2356                            proto::LspDiskBasedDiagnosticsUpdated {},
2357                        ),
2358                    );
2359                } else {
2360                    self.on_lsp_work_end(server_id, token.clone(), cx);
2361                    self.broadcast_language_server_update(
2362                        server_id,
2363                        proto::update_language_server::Variant::WorkEnd(proto::LspWorkEnd {
2364                            token,
2365                        }),
2366                    );
2367                }
2368            }
2369        }
2370    }
2371
2372    fn on_lsp_work_start(
2373        &mut self,
2374        language_server_id: usize,
2375        token: String,
2376        progress: LanguageServerProgress,
2377        cx: &mut ModelContext<Self>,
2378    ) {
2379        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2380            status.pending_work.insert(token, progress);
2381            cx.notify();
2382        }
2383    }
2384
2385    fn on_lsp_work_progress(
2386        &mut self,
2387        language_server_id: usize,
2388        token: String,
2389        progress: LanguageServerProgress,
2390        cx: &mut ModelContext<Self>,
2391    ) {
2392        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2393            let entry = status
2394                .pending_work
2395                .entry(token)
2396                .or_insert(LanguageServerProgress {
2397                    message: Default::default(),
2398                    percentage: Default::default(),
2399                    last_update_at: progress.last_update_at,
2400                });
2401            if progress.message.is_some() {
2402                entry.message = progress.message;
2403            }
2404            if progress.percentage.is_some() {
2405                entry.percentage = progress.percentage;
2406            }
2407            entry.last_update_at = progress.last_update_at;
2408            cx.notify();
2409        }
2410    }
2411
2412    fn on_lsp_work_end(
2413        &mut self,
2414        language_server_id: usize,
2415        token: String,
2416        cx: &mut ModelContext<Self>,
2417    ) {
2418        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2419            status.pending_work.remove(&token);
2420            cx.notify();
2421        }
2422    }
2423
2424    async fn on_lsp_workspace_edit(
2425        this: WeakModelHandle<Self>,
2426        params: lsp::ApplyWorkspaceEditParams,
2427        server_id: usize,
2428        adapter: Arc<CachedLspAdapter>,
2429        language_server: Arc<LanguageServer>,
2430        mut cx: AsyncAppContext,
2431    ) -> Result<lsp::ApplyWorkspaceEditResponse> {
2432        let this = this
2433            .upgrade(&cx)
2434            .ok_or_else(|| anyhow!("project project closed"))?;
2435        let transaction = Self::deserialize_workspace_edit(
2436            this.clone(),
2437            params.edit,
2438            true,
2439            adapter.clone(),
2440            language_server.clone(),
2441            &mut cx,
2442        )
2443        .await
2444        .log_err();
2445        this.update(&mut cx, |this, _| {
2446            if let Some(transaction) = transaction {
2447                this.last_workspace_edits_by_language_server
2448                    .insert(server_id, transaction);
2449            }
2450        });
2451        Ok(lsp::ApplyWorkspaceEditResponse {
2452            applied: true,
2453            failed_change: None,
2454            failure_reason: None,
2455        })
2456    }
2457
2458    fn broadcast_language_server_update(
2459        &self,
2460        language_server_id: usize,
2461        event: proto::update_language_server::Variant,
2462    ) {
2463        if let Some(project_id) = self.remote_id() {
2464            self.client
2465                .send(proto::UpdateLanguageServer {
2466                    project_id,
2467                    language_server_id: language_server_id as u64,
2468                    variant: Some(event),
2469                })
2470                .log_err();
2471        }
2472    }
2473
2474    pub fn set_language_server_settings(&mut self, settings: serde_json::Value) {
2475        for server_state in self.language_servers.values() {
2476            if let LanguageServerState::Running { server, .. } = server_state {
2477                server
2478                    .notify::<lsp::notification::DidChangeConfiguration>(
2479                        lsp::DidChangeConfigurationParams {
2480                            settings: settings.clone(),
2481                        },
2482                    )
2483                    .ok();
2484            }
2485        }
2486        *self.language_server_settings.lock() = settings;
2487    }
2488
2489    pub fn language_server_statuses(
2490        &self,
2491    ) -> impl DoubleEndedIterator<Item = &LanguageServerStatus> {
2492        self.language_server_statuses.values()
2493    }
2494
2495    pub fn update_diagnostics(
2496        &mut self,
2497        language_server_id: usize,
2498        params: lsp::PublishDiagnosticsParams,
2499        disk_based_sources: &[String],
2500        cx: &mut ModelContext<Self>,
2501    ) -> Result<()> {
2502        let abs_path = params
2503            .uri
2504            .to_file_path()
2505            .map_err(|_| anyhow!("URI is not a file"))?;
2506        let mut diagnostics = Vec::default();
2507        let mut primary_diagnostic_group_ids = HashMap::default();
2508        let mut sources_by_group_id = HashMap::default();
2509        let mut supporting_diagnostics = HashMap::default();
2510        for diagnostic in &params.diagnostics {
2511            let source = diagnostic.source.as_ref();
2512            let code = diagnostic.code.as_ref().map(|code| match code {
2513                lsp::NumberOrString::Number(code) => code.to_string(),
2514                lsp::NumberOrString::String(code) => code.clone(),
2515            });
2516            let range = range_from_lsp(diagnostic.range);
2517            let is_supporting = diagnostic
2518                .related_information
2519                .as_ref()
2520                .map_or(false, |infos| {
2521                    infos.iter().any(|info| {
2522                        primary_diagnostic_group_ids.contains_key(&(
2523                            source,
2524                            code.clone(),
2525                            range_from_lsp(info.location.range),
2526                        ))
2527                    })
2528                });
2529
2530            let is_unnecessary = diagnostic.tags.as_ref().map_or(false, |tags| {
2531                tags.iter().any(|tag| *tag == DiagnosticTag::UNNECESSARY)
2532            });
2533
2534            if is_supporting {
2535                supporting_diagnostics.insert(
2536                    (source, code.clone(), range),
2537                    (diagnostic.severity, is_unnecessary),
2538                );
2539            } else {
2540                let group_id = post_inc(&mut self.next_diagnostic_group_id);
2541                let is_disk_based =
2542                    source.map_or(false, |source| disk_based_sources.contains(source));
2543
2544                sources_by_group_id.insert(group_id, source);
2545                primary_diagnostic_group_ids
2546                    .insert((source, code.clone(), range.clone()), group_id);
2547
2548                diagnostics.push(DiagnosticEntry {
2549                    range,
2550                    diagnostic: Diagnostic {
2551                        code: code.clone(),
2552                        severity: diagnostic.severity.unwrap_or(DiagnosticSeverity::ERROR),
2553                        message: diagnostic.message.clone(),
2554                        group_id,
2555                        is_primary: true,
2556                        is_valid: true,
2557                        is_disk_based,
2558                        is_unnecessary,
2559                    },
2560                });
2561                if let Some(infos) = &diagnostic.related_information {
2562                    for info in infos {
2563                        if info.location.uri == params.uri && !info.message.is_empty() {
2564                            let range = range_from_lsp(info.location.range);
2565                            diagnostics.push(DiagnosticEntry {
2566                                range,
2567                                diagnostic: Diagnostic {
2568                                    code: code.clone(),
2569                                    severity: DiagnosticSeverity::INFORMATION,
2570                                    message: info.message.clone(),
2571                                    group_id,
2572                                    is_primary: false,
2573                                    is_valid: true,
2574                                    is_disk_based,
2575                                    is_unnecessary: false,
2576                                },
2577                            });
2578                        }
2579                    }
2580                }
2581            }
2582        }
2583
2584        for entry in &mut diagnostics {
2585            let diagnostic = &mut entry.diagnostic;
2586            if !diagnostic.is_primary {
2587                let source = *sources_by_group_id.get(&diagnostic.group_id).unwrap();
2588                if let Some(&(severity, is_unnecessary)) = supporting_diagnostics.get(&(
2589                    source,
2590                    diagnostic.code.clone(),
2591                    entry.range.clone(),
2592                )) {
2593                    if let Some(severity) = severity {
2594                        diagnostic.severity = severity;
2595                    }
2596                    diagnostic.is_unnecessary = is_unnecessary;
2597                }
2598            }
2599        }
2600
2601        self.update_diagnostic_entries(
2602            language_server_id,
2603            abs_path,
2604            params.version,
2605            diagnostics,
2606            cx,
2607        )?;
2608        Ok(())
2609    }
2610
2611    pub fn update_diagnostic_entries(
2612        &mut self,
2613        language_server_id: usize,
2614        abs_path: PathBuf,
2615        version: Option<i32>,
2616        diagnostics: Vec<DiagnosticEntry<Unclipped<PointUtf16>>>,
2617        cx: &mut ModelContext<Project>,
2618    ) -> Result<(), anyhow::Error> {
2619        let (worktree, relative_path) = self
2620            .find_local_worktree(&abs_path, cx)
2621            .ok_or_else(|| anyhow!("no worktree found for diagnostics"))?;
2622
2623        let project_path = ProjectPath {
2624            worktree_id: worktree.read(cx).id(),
2625            path: relative_path.into(),
2626        };
2627        if let Some(buffer) = self.get_open_buffer(&project_path, cx) {
2628            self.update_buffer_diagnostics(&buffer, diagnostics.clone(), version, cx)?;
2629        }
2630
2631        let updated = worktree.update(cx, |worktree, cx| {
2632            worktree
2633                .as_local_mut()
2634                .ok_or_else(|| anyhow!("not a local worktree"))?
2635                .update_diagnostics(
2636                    language_server_id,
2637                    project_path.path.clone(),
2638                    diagnostics,
2639                    cx,
2640                )
2641        })?;
2642        if updated {
2643            cx.emit(Event::DiagnosticsUpdated {
2644                language_server_id,
2645                path: project_path,
2646            });
2647        }
2648        Ok(())
2649    }
2650
2651    fn update_buffer_diagnostics(
2652        &mut self,
2653        buffer: &ModelHandle<Buffer>,
2654        mut diagnostics: Vec<DiagnosticEntry<Unclipped<PointUtf16>>>,
2655        version: Option<i32>,
2656        cx: &mut ModelContext<Self>,
2657    ) -> Result<()> {
2658        fn compare_diagnostics(a: &Diagnostic, b: &Diagnostic) -> Ordering {
2659            Ordering::Equal
2660                .then_with(|| b.is_primary.cmp(&a.is_primary))
2661                .then_with(|| a.is_disk_based.cmp(&b.is_disk_based))
2662                .then_with(|| a.severity.cmp(&b.severity))
2663                .then_with(|| a.message.cmp(&b.message))
2664        }
2665
2666        let snapshot = self.buffer_snapshot_for_lsp_version(buffer, version, cx)?;
2667
2668        diagnostics.sort_unstable_by(|a, b| {
2669            Ordering::Equal
2670                .then_with(|| a.range.start.cmp(&b.range.start))
2671                .then_with(|| b.range.end.cmp(&a.range.end))
2672                .then_with(|| compare_diagnostics(&a.diagnostic, &b.diagnostic))
2673        });
2674
2675        let mut sanitized_diagnostics = Vec::new();
2676        let edits_since_save = Patch::new(
2677            snapshot
2678                .edits_since::<Unclipped<PointUtf16>>(buffer.read(cx).saved_version())
2679                .collect(),
2680        );
2681        for entry in diagnostics {
2682            let start;
2683            let end;
2684            if entry.diagnostic.is_disk_based {
2685                // Some diagnostics are based on files on disk instead of buffers'
2686                // current contents. Adjust these diagnostics' ranges to reflect
2687                // any unsaved edits.
2688                start = edits_since_save.old_to_new(entry.range.start);
2689                end = edits_since_save.old_to_new(entry.range.end);
2690            } else {
2691                start = entry.range.start;
2692                end = entry.range.end;
2693            }
2694
2695            let mut range = snapshot.clip_point_utf16(start, Bias::Left)
2696                ..snapshot.clip_point_utf16(end, Bias::Right);
2697
2698            // Expand empty ranges by one codepoint
2699            if range.start == range.end {
2700                // This will be go to the next boundary when being clipped
2701                range.end.column += 1;
2702                range.end = snapshot.clip_point_utf16(Unclipped(range.end), Bias::Right);
2703                if range.start == range.end && range.end.column > 0 {
2704                    range.start.column -= 1;
2705                    range.end = snapshot.clip_point_utf16(Unclipped(range.end), Bias::Left);
2706                }
2707            }
2708
2709            sanitized_diagnostics.push(DiagnosticEntry {
2710                range,
2711                diagnostic: entry.diagnostic,
2712            });
2713        }
2714        drop(edits_since_save);
2715
2716        let set = DiagnosticSet::new(sanitized_diagnostics, &snapshot);
2717        buffer.update(cx, |buffer, cx| buffer.update_diagnostics(set, cx));
2718        Ok(())
2719    }
2720
2721    pub fn reload_buffers(
2722        &self,
2723        buffers: HashSet<ModelHandle<Buffer>>,
2724        push_to_history: bool,
2725        cx: &mut ModelContext<Self>,
2726    ) -> Task<Result<ProjectTransaction>> {
2727        let mut local_buffers = Vec::new();
2728        let mut remote_buffers = None;
2729        for buffer_handle in buffers {
2730            let buffer = buffer_handle.read(cx);
2731            if buffer.is_dirty() {
2732                if let Some(file) = File::from_dyn(buffer.file()) {
2733                    if file.is_local() {
2734                        local_buffers.push(buffer_handle);
2735                    } else {
2736                        remote_buffers.get_or_insert(Vec::new()).push(buffer_handle);
2737                    }
2738                }
2739            }
2740        }
2741
2742        let remote_buffers = self.remote_id().zip(remote_buffers);
2743        let client = self.client.clone();
2744
2745        cx.spawn(|this, mut cx| async move {
2746            let mut project_transaction = ProjectTransaction::default();
2747
2748            if let Some((project_id, remote_buffers)) = remote_buffers {
2749                let response = client
2750                    .request(proto::ReloadBuffers {
2751                        project_id,
2752                        buffer_ids: remote_buffers
2753                            .iter()
2754                            .map(|buffer| buffer.read_with(&cx, |buffer, _| buffer.remote_id()))
2755                            .collect(),
2756                    })
2757                    .await?
2758                    .transaction
2759                    .ok_or_else(|| anyhow!("missing transaction"))?;
2760                project_transaction = this
2761                    .update(&mut cx, |this, cx| {
2762                        this.deserialize_project_transaction(response, push_to_history, cx)
2763                    })
2764                    .await?;
2765            }
2766
2767            for buffer in local_buffers {
2768                let transaction = buffer
2769                    .update(&mut cx, |buffer, cx| buffer.reload(cx))
2770                    .await?;
2771                buffer.update(&mut cx, |buffer, cx| {
2772                    if let Some(transaction) = transaction {
2773                        if !push_to_history {
2774                            buffer.forget_transaction(transaction.id);
2775                        }
2776                        project_transaction.0.insert(cx.handle(), transaction);
2777                    }
2778                });
2779            }
2780
2781            Ok(project_transaction)
2782        })
2783    }
2784
2785    pub fn format(
2786        &self,
2787        buffers: HashSet<ModelHandle<Buffer>>,
2788        push_to_history: bool,
2789        trigger: FormatTrigger,
2790        cx: &mut ModelContext<Project>,
2791    ) -> Task<Result<ProjectTransaction>> {
2792        let mut local_buffers = Vec::new();
2793        let mut remote_buffers = None;
2794        for buffer_handle in buffers {
2795            let buffer = buffer_handle.read(cx);
2796            if let Some(file) = File::from_dyn(buffer.file()) {
2797                if let Some(buffer_abs_path) = file.as_local().map(|f| f.abs_path(cx)) {
2798                    if let Some((_, server)) = self.language_server_for_buffer(buffer, cx) {
2799                        local_buffers.push((buffer_handle, buffer_abs_path, server.clone()));
2800                    }
2801                } else {
2802                    remote_buffers.get_or_insert(Vec::new()).push(buffer_handle);
2803                }
2804            } else {
2805                return Task::ready(Ok(Default::default()));
2806            }
2807        }
2808
2809        let remote_buffers = self.remote_id().zip(remote_buffers);
2810        let client = self.client.clone();
2811
2812        cx.spawn(|this, mut cx| async move {
2813            let mut project_transaction = ProjectTransaction::default();
2814
2815            if let Some((project_id, remote_buffers)) = remote_buffers {
2816                let response = client
2817                    .request(proto::FormatBuffers {
2818                        project_id,
2819                        trigger: trigger as i32,
2820                        buffer_ids: remote_buffers
2821                            .iter()
2822                            .map(|buffer| buffer.read_with(&cx, |buffer, _| buffer.remote_id()))
2823                            .collect(),
2824                    })
2825                    .await?
2826                    .transaction
2827                    .ok_or_else(|| anyhow!("missing transaction"))?;
2828                project_transaction = this
2829                    .update(&mut cx, |this, cx| {
2830                        this.deserialize_project_transaction(response, push_to_history, cx)
2831                    })
2832                    .await?;
2833            }
2834
2835            // Do not allow multiple concurrent formatting requests for the
2836            // same buffer.
2837            this.update(&mut cx, |this, _| {
2838                local_buffers
2839                    .retain(|(buffer, _, _)| this.buffers_being_formatted.insert(buffer.id()));
2840            });
2841            let _cleanup = defer({
2842                let this = this.clone();
2843                let mut cx = cx.clone();
2844                let local_buffers = &local_buffers;
2845                move || {
2846                    this.update(&mut cx, |this, _| {
2847                        for (buffer, _, _) in local_buffers {
2848                            this.buffers_being_formatted.remove(&buffer.id());
2849                        }
2850                    });
2851                }
2852            });
2853
2854            for (buffer, buffer_abs_path, language_server) in &local_buffers {
2855                let (format_on_save, formatter, tab_size) = buffer.read_with(&cx, |buffer, cx| {
2856                    let settings = cx.global::<Settings>();
2857                    let language_name = buffer.language().map(|language| language.name());
2858                    (
2859                        settings.format_on_save(language_name.as_deref()),
2860                        settings.formatter(language_name.as_deref()),
2861                        settings.tab_size(language_name.as_deref()),
2862                    )
2863                });
2864
2865                let transaction = match (formatter, format_on_save) {
2866                    (_, FormatOnSave::Off) if trigger == FormatTrigger::Save => continue,
2867
2868                    (Formatter::LanguageServer, FormatOnSave::On | FormatOnSave::Off)
2869                    | (_, FormatOnSave::LanguageServer) => Self::format_via_lsp(
2870                        &this,
2871                        &buffer,
2872                        &buffer_abs_path,
2873                        &language_server,
2874                        tab_size,
2875                        &mut cx,
2876                    )
2877                    .await
2878                    .context("failed to format via language server")?,
2879
2880                    (
2881                        Formatter::External { command, arguments },
2882                        FormatOnSave::On | FormatOnSave::Off,
2883                    )
2884                    | (_, FormatOnSave::External { command, arguments }) => {
2885                        Self::format_via_external_command(
2886                            &buffer,
2887                            &buffer_abs_path,
2888                            &command,
2889                            &arguments,
2890                            &mut cx,
2891                        )
2892                        .await
2893                        .context(format!(
2894                            "failed to format via external command {:?}",
2895                            command
2896                        ))?
2897                    }
2898                };
2899
2900                if let Some(transaction) = transaction {
2901                    if !push_to_history {
2902                        buffer.update(&mut cx, |buffer, _| {
2903                            buffer.forget_transaction(transaction.id)
2904                        });
2905                    }
2906                    project_transaction.0.insert(buffer.clone(), transaction);
2907                }
2908            }
2909
2910            Ok(project_transaction)
2911        })
2912    }
2913
2914    async fn format_via_lsp(
2915        this: &ModelHandle<Self>,
2916        buffer: &ModelHandle<Buffer>,
2917        abs_path: &Path,
2918        language_server: &Arc<LanguageServer>,
2919        tab_size: NonZeroU32,
2920        cx: &mut AsyncAppContext,
2921    ) -> Result<Option<Transaction>> {
2922        let text_document =
2923            lsp::TextDocumentIdentifier::new(lsp::Url::from_file_path(abs_path).unwrap());
2924        let capabilities = &language_server.capabilities();
2925        let lsp_edits = if capabilities
2926            .document_formatting_provider
2927            .as_ref()
2928            .map_or(false, |provider| *provider != lsp::OneOf::Left(false))
2929        {
2930            language_server
2931                .request::<lsp::request::Formatting>(lsp::DocumentFormattingParams {
2932                    text_document,
2933                    options: lsp::FormattingOptions {
2934                        tab_size: tab_size.into(),
2935                        insert_spaces: true,
2936                        insert_final_newline: Some(true),
2937                        ..Default::default()
2938                    },
2939                    work_done_progress_params: Default::default(),
2940                })
2941                .await?
2942        } else if capabilities
2943            .document_range_formatting_provider
2944            .as_ref()
2945            .map_or(false, |provider| *provider != lsp::OneOf::Left(false))
2946        {
2947            let buffer_start = lsp::Position::new(0, 0);
2948            let buffer_end =
2949                buffer.read_with(cx, |buffer, _| point_to_lsp(buffer.max_point_utf16()));
2950            language_server
2951                .request::<lsp::request::RangeFormatting>(lsp::DocumentRangeFormattingParams {
2952                    text_document,
2953                    range: lsp::Range::new(buffer_start, buffer_end),
2954                    options: lsp::FormattingOptions {
2955                        tab_size: tab_size.into(),
2956                        insert_spaces: true,
2957                        insert_final_newline: Some(true),
2958                        ..Default::default()
2959                    },
2960                    work_done_progress_params: Default::default(),
2961                })
2962                .await?
2963        } else {
2964            None
2965        };
2966
2967        if let Some(lsp_edits) = lsp_edits {
2968            let edits = this
2969                .update(cx, |this, cx| {
2970                    this.edits_from_lsp(buffer, lsp_edits, None, cx)
2971                })
2972                .await?;
2973            buffer.update(cx, |buffer, cx| {
2974                buffer.finalize_last_transaction();
2975                buffer.start_transaction();
2976                for (range, text) in edits {
2977                    buffer.edit([(range, text)], None, cx);
2978                }
2979                if buffer.end_transaction(cx).is_some() {
2980                    let transaction = buffer.finalize_last_transaction().unwrap().clone();
2981                    Ok(Some(transaction))
2982                } else {
2983                    Ok(None)
2984                }
2985            })
2986        } else {
2987            Ok(None)
2988        }
2989    }
2990
2991    async fn format_via_external_command(
2992        buffer: &ModelHandle<Buffer>,
2993        buffer_abs_path: &Path,
2994        command: &str,
2995        arguments: &[String],
2996        cx: &mut AsyncAppContext,
2997    ) -> Result<Option<Transaction>> {
2998        let working_dir_path = buffer.read_with(cx, |buffer, cx| {
2999            let file = File::from_dyn(buffer.file())?;
3000            let worktree = file.worktree.read(cx).as_local()?;
3001            let mut worktree_path = worktree.abs_path().to_path_buf();
3002            if worktree.root_entry()?.is_file() {
3003                worktree_path.pop();
3004            }
3005            Some(worktree_path)
3006        });
3007
3008        if let Some(working_dir_path) = working_dir_path {
3009            let mut child =
3010                smol::process::Command::new(command)
3011                    .args(arguments.iter().map(|arg| {
3012                        arg.replace("{buffer_path}", &buffer_abs_path.to_string_lossy())
3013                    }))
3014                    .current_dir(&working_dir_path)
3015                    .stdin(smol::process::Stdio::piped())
3016                    .stdout(smol::process::Stdio::piped())
3017                    .stderr(smol::process::Stdio::piped())
3018                    .spawn()?;
3019            let stdin = child
3020                .stdin
3021                .as_mut()
3022                .ok_or_else(|| anyhow!("failed to acquire stdin"))?;
3023            let text = buffer.read_with(cx, |buffer, _| buffer.as_rope().clone());
3024            for chunk in text.chunks() {
3025                stdin.write_all(chunk.as_bytes()).await?;
3026            }
3027            stdin.flush().await?;
3028
3029            let output = child.output().await?;
3030            if !output.status.success() {
3031                return Err(anyhow!(
3032                    "command failed with exit code {:?}:\nstdout: {}\nstderr: {}",
3033                    output.status.code(),
3034                    String::from_utf8_lossy(&output.stdout),
3035                    String::from_utf8_lossy(&output.stderr),
3036                ));
3037            }
3038
3039            let stdout = String::from_utf8(output.stdout)?;
3040            let diff = buffer
3041                .read_with(cx, |buffer, cx| buffer.diff(stdout, cx))
3042                .await;
3043            Ok(buffer.update(cx, |buffer, cx| buffer.apply_diff(diff, cx).cloned()))
3044        } else {
3045            Ok(None)
3046        }
3047    }
3048
3049    pub fn definition<T: ToPointUtf16>(
3050        &self,
3051        buffer: &ModelHandle<Buffer>,
3052        position: T,
3053        cx: &mut ModelContext<Self>,
3054    ) -> Task<Result<Vec<LocationLink>>> {
3055        let position = position.to_point_utf16(buffer.read(cx));
3056        self.request_lsp(buffer.clone(), GetDefinition { position }, cx)
3057    }
3058
3059    pub fn type_definition<T: ToPointUtf16>(
3060        &self,
3061        buffer: &ModelHandle<Buffer>,
3062        position: T,
3063        cx: &mut ModelContext<Self>,
3064    ) -> Task<Result<Vec<LocationLink>>> {
3065        let position = position.to_point_utf16(buffer.read(cx));
3066        self.request_lsp(buffer.clone(), GetTypeDefinition { position }, cx)
3067    }
3068
3069    pub fn references<T: ToPointUtf16>(
3070        &self,
3071        buffer: &ModelHandle<Buffer>,
3072        position: T,
3073        cx: &mut ModelContext<Self>,
3074    ) -> Task<Result<Vec<Location>>> {
3075        let position = position.to_point_utf16(buffer.read(cx));
3076        self.request_lsp(buffer.clone(), GetReferences { position }, cx)
3077    }
3078
3079    pub fn document_highlights<T: ToPointUtf16>(
3080        &self,
3081        buffer: &ModelHandle<Buffer>,
3082        position: T,
3083        cx: &mut ModelContext<Self>,
3084    ) -> Task<Result<Vec<DocumentHighlight>>> {
3085        let position = position.to_point_utf16(buffer.read(cx));
3086        self.request_lsp(buffer.clone(), GetDocumentHighlights { position }, cx)
3087    }
3088
3089    pub fn symbols(&self, query: &str, cx: &mut ModelContext<Self>) -> Task<Result<Vec<Symbol>>> {
3090        if self.is_local() {
3091            let mut requests = Vec::new();
3092            for ((worktree_id, _), server_id) in self.language_server_ids.iter() {
3093                let worktree_id = *worktree_id;
3094                if let Some(worktree) = self
3095                    .worktree_for_id(worktree_id, cx)
3096                    .and_then(|worktree| worktree.read(cx).as_local())
3097                {
3098                    if let Some(LanguageServerState::Running {
3099                        adapter,
3100                        language,
3101                        server,
3102                    }) = self.language_servers.get(server_id)
3103                    {
3104                        let adapter = adapter.clone();
3105                        let language = language.clone();
3106                        let worktree_abs_path = worktree.abs_path().clone();
3107                        requests.push(
3108                            server
3109                                .request::<lsp::request::WorkspaceSymbol>(
3110                                    lsp::WorkspaceSymbolParams {
3111                                        query: query.to_string(),
3112                                        ..Default::default()
3113                                    },
3114                                )
3115                                .log_err()
3116                                .map(move |response| {
3117                                    (
3118                                        adapter,
3119                                        language,
3120                                        worktree_id,
3121                                        worktree_abs_path,
3122                                        response.unwrap_or_default(),
3123                                    )
3124                                }),
3125                        );
3126                    }
3127                }
3128            }
3129
3130            cx.spawn_weak(|this, cx| async move {
3131                let responses = futures::future::join_all(requests).await;
3132                let this = if let Some(this) = this.upgrade(&cx) {
3133                    this
3134                } else {
3135                    return Ok(Default::default());
3136                };
3137                let symbols = this.read_with(&cx, |this, cx| {
3138                    let mut symbols = Vec::new();
3139                    for (
3140                        adapter,
3141                        adapter_language,
3142                        source_worktree_id,
3143                        worktree_abs_path,
3144                        response,
3145                    ) in responses
3146                    {
3147                        symbols.extend(response.into_iter().flatten().filter_map(|lsp_symbol| {
3148                            let abs_path = lsp_symbol.location.uri.to_file_path().ok()?;
3149                            let mut worktree_id = source_worktree_id;
3150                            let path;
3151                            if let Some((worktree, rel_path)) =
3152                                this.find_local_worktree(&abs_path, cx)
3153                            {
3154                                worktree_id = worktree.read(cx).id();
3155                                path = rel_path;
3156                            } else {
3157                                path = relativize_path(&worktree_abs_path, &abs_path);
3158                            }
3159
3160                            let project_path = ProjectPath {
3161                                worktree_id,
3162                                path: path.into(),
3163                            };
3164                            let signature = this.symbol_signature(&project_path);
3165                            let language = this
3166                                .languages
3167                                .select_language(&project_path.path)
3168                                .unwrap_or(adapter_language.clone());
3169                            let language_server_name = adapter.name.clone();
3170                            Some(async move {
3171                                let label = language
3172                                    .label_for_symbol(&lsp_symbol.name, lsp_symbol.kind)
3173                                    .await;
3174
3175                                Symbol {
3176                                    language_server_name,
3177                                    source_worktree_id,
3178                                    path: project_path,
3179                                    label: label.unwrap_or_else(|| {
3180                                        CodeLabel::plain(lsp_symbol.name.clone(), None)
3181                                    }),
3182                                    kind: lsp_symbol.kind,
3183                                    name: lsp_symbol.name,
3184                                    range: range_from_lsp(lsp_symbol.location.range),
3185                                    signature,
3186                                }
3187                            })
3188                        }));
3189                    }
3190                    symbols
3191                });
3192                Ok(futures::future::join_all(symbols).await)
3193            })
3194        } else if let Some(project_id) = self.remote_id() {
3195            let request = self.client.request(proto::GetProjectSymbols {
3196                project_id,
3197                query: query.to_string(),
3198            });
3199            cx.spawn_weak(|this, cx| async move {
3200                let response = request.await?;
3201                let mut symbols = Vec::new();
3202                if let Some(this) = this.upgrade(&cx) {
3203                    let new_symbols = this.read_with(&cx, |this, _| {
3204                        response
3205                            .symbols
3206                            .into_iter()
3207                            .map(|symbol| this.deserialize_symbol(symbol))
3208                            .collect::<Vec<_>>()
3209                    });
3210                    symbols = futures::future::join_all(new_symbols)
3211                        .await
3212                        .into_iter()
3213                        .filter_map(|symbol| symbol.log_err())
3214                        .collect::<Vec<_>>();
3215                }
3216                Ok(symbols)
3217            })
3218        } else {
3219            Task::ready(Ok(Default::default()))
3220        }
3221    }
3222
3223    pub fn open_buffer_for_symbol(
3224        &mut self,
3225        symbol: &Symbol,
3226        cx: &mut ModelContext<Self>,
3227    ) -> Task<Result<ModelHandle<Buffer>>> {
3228        if self.is_local() {
3229            let language_server_id = if let Some(id) = self.language_server_ids.get(&(
3230                symbol.source_worktree_id,
3231                symbol.language_server_name.clone(),
3232            )) {
3233                *id
3234            } else {
3235                return Task::ready(Err(anyhow!(
3236                    "language server for worktree and language not found"
3237                )));
3238            };
3239
3240            let worktree_abs_path = if let Some(worktree_abs_path) = self
3241                .worktree_for_id(symbol.path.worktree_id, cx)
3242                .and_then(|worktree| worktree.read(cx).as_local())
3243                .map(|local_worktree| local_worktree.abs_path())
3244            {
3245                worktree_abs_path
3246            } else {
3247                return Task::ready(Err(anyhow!("worktree not found for symbol")));
3248            };
3249            let symbol_abs_path = worktree_abs_path.join(&symbol.path.path);
3250            let symbol_uri = if let Ok(uri) = lsp::Url::from_file_path(symbol_abs_path) {
3251                uri
3252            } else {
3253                return Task::ready(Err(anyhow!("invalid symbol path")));
3254            };
3255
3256            self.open_local_buffer_via_lsp(
3257                symbol_uri,
3258                language_server_id,
3259                symbol.language_server_name.clone(),
3260                cx,
3261            )
3262        } else if let Some(project_id) = self.remote_id() {
3263            let request = self.client.request(proto::OpenBufferForSymbol {
3264                project_id,
3265                symbol: Some(serialize_symbol(symbol)),
3266            });
3267            cx.spawn(|this, mut cx| async move {
3268                let response = request.await?;
3269                this.update(&mut cx, |this, cx| {
3270                    this.wait_for_buffer(response.buffer_id, cx)
3271                })
3272                .await
3273            })
3274        } else {
3275            Task::ready(Err(anyhow!("project does not have a remote id")))
3276        }
3277    }
3278
3279    pub fn hover<T: ToPointUtf16>(
3280        &self,
3281        buffer: &ModelHandle<Buffer>,
3282        position: T,
3283        cx: &mut ModelContext<Self>,
3284    ) -> Task<Result<Option<Hover>>> {
3285        let position = position.to_point_utf16(buffer.read(cx));
3286        self.request_lsp(buffer.clone(), GetHover { position }, cx)
3287    }
3288
3289    pub fn completions<T: ToPointUtf16>(
3290        &self,
3291        source_buffer_handle: &ModelHandle<Buffer>,
3292        position: T,
3293        cx: &mut ModelContext<Self>,
3294    ) -> Task<Result<Vec<Completion>>> {
3295        let source_buffer_handle = source_buffer_handle.clone();
3296        let source_buffer = source_buffer_handle.read(cx);
3297        let buffer_id = source_buffer.remote_id();
3298        let language = source_buffer.language().cloned();
3299        let worktree;
3300        let buffer_abs_path;
3301        if let Some(file) = File::from_dyn(source_buffer.file()) {
3302            worktree = file.worktree.clone();
3303            buffer_abs_path = file.as_local().map(|f| f.abs_path(cx));
3304        } else {
3305            return Task::ready(Ok(Default::default()));
3306        };
3307
3308        let position = Unclipped(position.to_point_utf16(source_buffer));
3309        let anchor = source_buffer.anchor_after(position);
3310
3311        if worktree.read(cx).as_local().is_some() {
3312            let buffer_abs_path = buffer_abs_path.unwrap();
3313            let lang_server =
3314                if let Some((_, server)) = self.language_server_for_buffer(source_buffer, cx) {
3315                    server.clone()
3316                } else {
3317                    return Task::ready(Ok(Default::default()));
3318                };
3319
3320            cx.spawn(|_, cx| async move {
3321                let completions = lang_server
3322                    .request::<lsp::request::Completion>(lsp::CompletionParams {
3323                        text_document_position: lsp::TextDocumentPositionParams::new(
3324                            lsp::TextDocumentIdentifier::new(
3325                                lsp::Url::from_file_path(buffer_abs_path).unwrap(),
3326                            ),
3327                            point_to_lsp(position.0),
3328                        ),
3329                        context: Default::default(),
3330                        work_done_progress_params: Default::default(),
3331                        partial_result_params: Default::default(),
3332                    })
3333                    .await
3334                    .context("lsp completion request failed")?;
3335
3336                let completions = if let Some(completions) = completions {
3337                    match completions {
3338                        lsp::CompletionResponse::Array(completions) => completions,
3339                        lsp::CompletionResponse::List(list) => list.items,
3340                    }
3341                } else {
3342                    Default::default()
3343                };
3344
3345                let completions = source_buffer_handle.read_with(&cx, |this, _| {
3346                    let snapshot = this.snapshot();
3347                    let clipped_position = this.clip_point_utf16(position, Bias::Left);
3348                    let mut range_for_token = None;
3349                    completions
3350                        .into_iter()
3351                        .filter_map(move |mut lsp_completion| {
3352                            // For now, we can only handle additional edits if they are returned
3353                            // when resolving the completion, not if they are present initially.
3354                            if lsp_completion
3355                                .additional_text_edits
3356                                .as_ref()
3357                                .map_or(false, |edits| !edits.is_empty())
3358                            {
3359                                return None;
3360                            }
3361
3362                            let (old_range, mut new_text) = match lsp_completion.text_edit.as_ref()
3363                            {
3364                                // If the language server provides a range to overwrite, then
3365                                // check that the range is valid.
3366                                Some(lsp::CompletionTextEdit::Edit(edit)) => {
3367                                    let range = range_from_lsp(edit.range);
3368                                    let start = snapshot.clip_point_utf16(range.start, Bias::Left);
3369                                    let end = snapshot.clip_point_utf16(range.end, Bias::Left);
3370                                    if start != range.start.0 || end != range.end.0 {
3371                                        log::info!("completion out of expected range");
3372                                        return None;
3373                                    }
3374                                    (
3375                                        snapshot.anchor_before(start)..snapshot.anchor_after(end),
3376                                        edit.new_text.clone(),
3377                                    )
3378                                }
3379                                // If the language server does not provide a range, then infer
3380                                // the range based on the syntax tree.
3381                                None => {
3382                                    if position.0 != clipped_position {
3383                                        log::info!("completion out of expected range");
3384                                        return None;
3385                                    }
3386                                    let Range { start, end } = range_for_token
3387                                        .get_or_insert_with(|| {
3388                                            let offset = position.to_offset(&snapshot);
3389                                            let (range, kind) = snapshot.surrounding_word(offset);
3390                                            if kind == Some(CharKind::Word) {
3391                                                range
3392                                            } else {
3393                                                offset..offset
3394                                            }
3395                                        })
3396                                        .clone();
3397                                    let text = lsp_completion
3398                                        .insert_text
3399                                        .as_ref()
3400                                        .unwrap_or(&lsp_completion.label)
3401                                        .clone();
3402                                    (
3403                                        snapshot.anchor_before(start)..snapshot.anchor_after(end),
3404                                        text,
3405                                    )
3406                                }
3407                                Some(lsp::CompletionTextEdit::InsertAndReplace(_)) => {
3408                                    log::info!("unsupported insert/replace completion");
3409                                    return None;
3410                                }
3411                            };
3412
3413                            LineEnding::normalize(&mut new_text);
3414                            let language = language.clone();
3415                            Some(async move {
3416                                let mut label = None;
3417                                if let Some(language) = language {
3418                                    language.process_completion(&mut lsp_completion).await;
3419                                    label = language.label_for_completion(&lsp_completion).await;
3420                                }
3421                                Completion {
3422                                    old_range,
3423                                    new_text,
3424                                    label: label.unwrap_or_else(|| {
3425                                        CodeLabel::plain(
3426                                            lsp_completion.label.clone(),
3427                                            lsp_completion.filter_text.as_deref(),
3428                                        )
3429                                    }),
3430                                    lsp_completion,
3431                                }
3432                            })
3433                        })
3434                });
3435
3436                Ok(futures::future::join_all(completions).await)
3437            })
3438        } else if let Some(project_id) = self.remote_id() {
3439            let rpc = self.client.clone();
3440            let message = proto::GetCompletions {
3441                project_id,
3442                buffer_id,
3443                position: Some(language::proto::serialize_anchor(&anchor)),
3444                version: serialize_version(&source_buffer.version()),
3445            };
3446            cx.spawn_weak(|this, mut cx| async move {
3447                let response = rpc.request(message).await?;
3448
3449                if this
3450                    .upgrade(&cx)
3451                    .ok_or_else(|| anyhow!("project was dropped"))?
3452                    .read_with(&cx, |this, _| this.is_read_only())
3453                {
3454                    return Err(anyhow!(
3455                        "failed to get completions: project was disconnected"
3456                    ));
3457                } else {
3458                    source_buffer_handle
3459                        .update(&mut cx, |buffer, _| {
3460                            buffer.wait_for_version(deserialize_version(response.version))
3461                        })
3462                        .await;
3463
3464                    let completions = response.completions.into_iter().map(|completion| {
3465                        language::proto::deserialize_completion(completion, language.clone())
3466                    });
3467                    futures::future::try_join_all(completions).await
3468                }
3469            })
3470        } else {
3471            Task::ready(Ok(Default::default()))
3472        }
3473    }
3474
3475    pub fn apply_additional_edits_for_completion(
3476        &self,
3477        buffer_handle: ModelHandle<Buffer>,
3478        completion: Completion,
3479        push_to_history: bool,
3480        cx: &mut ModelContext<Self>,
3481    ) -> Task<Result<Option<Transaction>>> {
3482        let buffer = buffer_handle.read(cx);
3483        let buffer_id = buffer.remote_id();
3484
3485        if self.is_local() {
3486            let lang_server = match self.language_server_for_buffer(buffer, cx) {
3487                Some((_, server)) => server.clone(),
3488                _ => return Task::ready(Ok(Default::default())),
3489            };
3490
3491            cx.spawn(|this, mut cx| async move {
3492                let resolved_completion = lang_server
3493                    .request::<lsp::request::ResolveCompletionItem>(completion.lsp_completion)
3494                    .await?;
3495
3496                if let Some(edits) = resolved_completion.additional_text_edits {
3497                    let edits = this
3498                        .update(&mut cx, |this, cx| {
3499                            this.edits_from_lsp(&buffer_handle, edits, None, cx)
3500                        })
3501                        .await?;
3502
3503                    buffer_handle.update(&mut cx, |buffer, cx| {
3504                        buffer.finalize_last_transaction();
3505                        buffer.start_transaction();
3506
3507                        for (range, text) in edits {
3508                            let primary = &completion.old_range;
3509                            let start_within = primary.start.cmp(&range.start, buffer).is_le()
3510                                && primary.end.cmp(&range.start, buffer).is_ge();
3511                            let end_within = range.start.cmp(&primary.end, buffer).is_le()
3512                                && range.end.cmp(&primary.end, buffer).is_ge();
3513
3514                            //Skip addtional edits which overlap with the primary completion edit
3515                            //https://github.com/zed-industries/zed/pull/1871
3516                            if !start_within && !end_within {
3517                                buffer.edit([(range, text)], None, cx);
3518                            }
3519                        }
3520
3521                        let transaction = if buffer.end_transaction(cx).is_some() {
3522                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
3523                            if !push_to_history {
3524                                buffer.forget_transaction(transaction.id);
3525                            }
3526                            Some(transaction)
3527                        } else {
3528                            None
3529                        };
3530                        Ok(transaction)
3531                    })
3532                } else {
3533                    Ok(None)
3534                }
3535            })
3536        } else if let Some(project_id) = self.remote_id() {
3537            let client = self.client.clone();
3538            cx.spawn(|_, mut cx| async move {
3539                let response = client
3540                    .request(proto::ApplyCompletionAdditionalEdits {
3541                        project_id,
3542                        buffer_id,
3543                        completion: Some(language::proto::serialize_completion(&completion)),
3544                    })
3545                    .await?;
3546
3547                if let Some(transaction) = response.transaction {
3548                    let transaction = language::proto::deserialize_transaction(transaction)?;
3549                    buffer_handle
3550                        .update(&mut cx, |buffer, _| {
3551                            buffer.wait_for_edits(transaction.edit_ids.iter().copied())
3552                        })
3553                        .await;
3554                    if push_to_history {
3555                        buffer_handle.update(&mut cx, |buffer, _| {
3556                            buffer.push_transaction(transaction.clone(), Instant::now());
3557                        });
3558                    }
3559                    Ok(Some(transaction))
3560                } else {
3561                    Ok(None)
3562                }
3563            })
3564        } else {
3565            Task::ready(Err(anyhow!("project does not have a remote id")))
3566        }
3567    }
3568
3569    pub fn code_actions<T: Clone + ToOffset>(
3570        &self,
3571        buffer_handle: &ModelHandle<Buffer>,
3572        range: Range<T>,
3573        cx: &mut ModelContext<Self>,
3574    ) -> Task<Result<Vec<CodeAction>>> {
3575        let buffer_handle = buffer_handle.clone();
3576        let buffer = buffer_handle.read(cx);
3577        let snapshot = buffer.snapshot();
3578        let relevant_diagnostics = snapshot
3579            .diagnostics_in_range::<usize, usize>(range.to_offset(&snapshot), false)
3580            .map(|entry| entry.to_lsp_diagnostic_stub())
3581            .collect();
3582        let buffer_id = buffer.remote_id();
3583        let worktree;
3584        let buffer_abs_path;
3585        if let Some(file) = File::from_dyn(buffer.file()) {
3586            worktree = file.worktree.clone();
3587            buffer_abs_path = file.as_local().map(|f| f.abs_path(cx));
3588        } else {
3589            return Task::ready(Ok(Default::default()));
3590        };
3591        let range = buffer.anchor_before(range.start)..buffer.anchor_before(range.end);
3592
3593        if worktree.read(cx).as_local().is_some() {
3594            let buffer_abs_path = buffer_abs_path.unwrap();
3595            let lang_server = if let Some((_, server)) = self.language_server_for_buffer(buffer, cx)
3596            {
3597                server.clone()
3598            } else {
3599                return Task::ready(Ok(Default::default()));
3600            };
3601
3602            let lsp_range = range_to_lsp(range.to_point_utf16(buffer));
3603            cx.foreground().spawn(async move {
3604                if lang_server.capabilities().code_action_provider.is_none() {
3605                    return Ok(Default::default());
3606                }
3607
3608                Ok(lang_server
3609                    .request::<lsp::request::CodeActionRequest>(lsp::CodeActionParams {
3610                        text_document: lsp::TextDocumentIdentifier::new(
3611                            lsp::Url::from_file_path(buffer_abs_path).unwrap(),
3612                        ),
3613                        range: lsp_range,
3614                        work_done_progress_params: Default::default(),
3615                        partial_result_params: Default::default(),
3616                        context: lsp::CodeActionContext {
3617                            diagnostics: relevant_diagnostics,
3618                            only: Some(vec![
3619                                lsp::CodeActionKind::EMPTY,
3620                                lsp::CodeActionKind::QUICKFIX,
3621                                lsp::CodeActionKind::REFACTOR,
3622                                lsp::CodeActionKind::REFACTOR_EXTRACT,
3623                                lsp::CodeActionKind::SOURCE,
3624                            ]),
3625                        },
3626                    })
3627                    .await?
3628                    .unwrap_or_default()
3629                    .into_iter()
3630                    .filter_map(|entry| {
3631                        if let lsp::CodeActionOrCommand::CodeAction(lsp_action) = entry {
3632                            Some(CodeAction {
3633                                range: range.clone(),
3634                                lsp_action,
3635                            })
3636                        } else {
3637                            None
3638                        }
3639                    })
3640                    .collect())
3641            })
3642        } else if let Some(project_id) = self.remote_id() {
3643            let rpc = self.client.clone();
3644            let version = buffer.version();
3645            cx.spawn_weak(|this, mut cx| async move {
3646                let response = rpc
3647                    .request(proto::GetCodeActions {
3648                        project_id,
3649                        buffer_id,
3650                        start: Some(language::proto::serialize_anchor(&range.start)),
3651                        end: Some(language::proto::serialize_anchor(&range.end)),
3652                        version: serialize_version(&version),
3653                    })
3654                    .await?;
3655
3656                if this
3657                    .upgrade(&cx)
3658                    .ok_or_else(|| anyhow!("project was dropped"))?
3659                    .read_with(&cx, |this, _| this.is_read_only())
3660                {
3661                    return Err(anyhow!(
3662                        "failed to get code actions: project was disconnected"
3663                    ));
3664                } else {
3665                    buffer_handle
3666                        .update(&mut cx, |buffer, _| {
3667                            buffer.wait_for_version(deserialize_version(response.version))
3668                        })
3669                        .await;
3670
3671                    response
3672                        .actions
3673                        .into_iter()
3674                        .map(language::proto::deserialize_code_action)
3675                        .collect()
3676                }
3677            })
3678        } else {
3679            Task::ready(Ok(Default::default()))
3680        }
3681    }
3682
3683    pub fn apply_code_action(
3684        &self,
3685        buffer_handle: ModelHandle<Buffer>,
3686        mut action: CodeAction,
3687        push_to_history: bool,
3688        cx: &mut ModelContext<Self>,
3689    ) -> Task<Result<ProjectTransaction>> {
3690        if self.is_local() {
3691            let buffer = buffer_handle.read(cx);
3692            let (lsp_adapter, lang_server) =
3693                if let Some((adapter, server)) = self.language_server_for_buffer(buffer, cx) {
3694                    (adapter.clone(), server.clone())
3695                } else {
3696                    return Task::ready(Ok(Default::default()));
3697                };
3698            let range = action.range.to_point_utf16(buffer);
3699
3700            cx.spawn(|this, mut cx| async move {
3701                if let Some(lsp_range) = action
3702                    .lsp_action
3703                    .data
3704                    .as_mut()
3705                    .and_then(|d| d.get_mut("codeActionParams"))
3706                    .and_then(|d| d.get_mut("range"))
3707                {
3708                    *lsp_range = serde_json::to_value(&range_to_lsp(range)).unwrap();
3709                    action.lsp_action = lang_server
3710                        .request::<lsp::request::CodeActionResolveRequest>(action.lsp_action)
3711                        .await?;
3712                } else {
3713                    let actions = this
3714                        .update(&mut cx, |this, cx| {
3715                            this.code_actions(&buffer_handle, action.range, cx)
3716                        })
3717                        .await?;
3718                    action.lsp_action = actions
3719                        .into_iter()
3720                        .find(|a| a.lsp_action.title == action.lsp_action.title)
3721                        .ok_or_else(|| anyhow!("code action is outdated"))?
3722                        .lsp_action;
3723                }
3724
3725                if let Some(edit) = action.lsp_action.edit {
3726                    if edit.changes.is_some() || edit.document_changes.is_some() {
3727                        return Self::deserialize_workspace_edit(
3728                            this,
3729                            edit,
3730                            push_to_history,
3731                            lsp_adapter.clone(),
3732                            lang_server.clone(),
3733                            &mut cx,
3734                        )
3735                        .await;
3736                    }
3737                }
3738
3739                if let Some(command) = action.lsp_action.command {
3740                    this.update(&mut cx, |this, _| {
3741                        this.last_workspace_edits_by_language_server
3742                            .remove(&lang_server.server_id());
3743                    });
3744                    lang_server
3745                        .request::<lsp::request::ExecuteCommand>(lsp::ExecuteCommandParams {
3746                            command: command.command,
3747                            arguments: command.arguments.unwrap_or_default(),
3748                            ..Default::default()
3749                        })
3750                        .await?;
3751                    return Ok(this.update(&mut cx, |this, _| {
3752                        this.last_workspace_edits_by_language_server
3753                            .remove(&lang_server.server_id())
3754                            .unwrap_or_default()
3755                    }));
3756                }
3757
3758                Ok(ProjectTransaction::default())
3759            })
3760        } else if let Some(project_id) = self.remote_id() {
3761            let client = self.client.clone();
3762            let request = proto::ApplyCodeAction {
3763                project_id,
3764                buffer_id: buffer_handle.read(cx).remote_id(),
3765                action: Some(language::proto::serialize_code_action(&action)),
3766            };
3767            cx.spawn(|this, mut cx| async move {
3768                let response = client
3769                    .request(request)
3770                    .await?
3771                    .transaction
3772                    .ok_or_else(|| anyhow!("missing transaction"))?;
3773                this.update(&mut cx, |this, cx| {
3774                    this.deserialize_project_transaction(response, push_to_history, cx)
3775                })
3776                .await
3777            })
3778        } else {
3779            Task::ready(Err(anyhow!("project does not have a remote id")))
3780        }
3781    }
3782
3783    async fn deserialize_workspace_edit(
3784        this: ModelHandle<Self>,
3785        edit: lsp::WorkspaceEdit,
3786        push_to_history: bool,
3787        lsp_adapter: Arc<CachedLspAdapter>,
3788        language_server: Arc<LanguageServer>,
3789        cx: &mut AsyncAppContext,
3790    ) -> Result<ProjectTransaction> {
3791        let fs = this.read_with(cx, |this, _| this.fs.clone());
3792        let mut operations = Vec::new();
3793        if let Some(document_changes) = edit.document_changes {
3794            match document_changes {
3795                lsp::DocumentChanges::Edits(edits) => {
3796                    operations.extend(edits.into_iter().map(lsp::DocumentChangeOperation::Edit))
3797                }
3798                lsp::DocumentChanges::Operations(ops) => operations = ops,
3799            }
3800        } else if let Some(changes) = edit.changes {
3801            operations.extend(changes.into_iter().map(|(uri, edits)| {
3802                lsp::DocumentChangeOperation::Edit(lsp::TextDocumentEdit {
3803                    text_document: lsp::OptionalVersionedTextDocumentIdentifier {
3804                        uri,
3805                        version: None,
3806                    },
3807                    edits: edits.into_iter().map(lsp::OneOf::Left).collect(),
3808                })
3809            }));
3810        }
3811
3812        let mut project_transaction = ProjectTransaction::default();
3813        for operation in operations {
3814            match operation {
3815                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Create(op)) => {
3816                    let abs_path = op
3817                        .uri
3818                        .to_file_path()
3819                        .map_err(|_| anyhow!("can't convert URI to path"))?;
3820
3821                    if let Some(parent_path) = abs_path.parent() {
3822                        fs.create_dir(parent_path).await?;
3823                    }
3824                    if abs_path.ends_with("/") {
3825                        fs.create_dir(&abs_path).await?;
3826                    } else {
3827                        fs.create_file(&abs_path, op.options.map(Into::into).unwrap_or_default())
3828                            .await?;
3829                    }
3830                }
3831                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Rename(op)) => {
3832                    let source_abs_path = op
3833                        .old_uri
3834                        .to_file_path()
3835                        .map_err(|_| anyhow!("can't convert URI to path"))?;
3836                    let target_abs_path = op
3837                        .new_uri
3838                        .to_file_path()
3839                        .map_err(|_| anyhow!("can't convert URI to path"))?;
3840                    fs.rename(
3841                        &source_abs_path,
3842                        &target_abs_path,
3843                        op.options.map(Into::into).unwrap_or_default(),
3844                    )
3845                    .await?;
3846                }
3847                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Delete(op)) => {
3848                    let abs_path = op
3849                        .uri
3850                        .to_file_path()
3851                        .map_err(|_| anyhow!("can't convert URI to path"))?;
3852                    let options = op.options.map(Into::into).unwrap_or_default();
3853                    if abs_path.ends_with("/") {
3854                        fs.remove_dir(&abs_path, options).await?;
3855                    } else {
3856                        fs.remove_file(&abs_path, options).await?;
3857                    }
3858                }
3859                lsp::DocumentChangeOperation::Edit(op) => {
3860                    let buffer_to_edit = this
3861                        .update(cx, |this, cx| {
3862                            this.open_local_buffer_via_lsp(
3863                                op.text_document.uri,
3864                                language_server.server_id(),
3865                                lsp_adapter.name.clone(),
3866                                cx,
3867                            )
3868                        })
3869                        .await?;
3870
3871                    let edits = this
3872                        .update(cx, |this, cx| {
3873                            let edits = op.edits.into_iter().map(|edit| match edit {
3874                                lsp::OneOf::Left(edit) => edit,
3875                                lsp::OneOf::Right(edit) => edit.text_edit,
3876                            });
3877                            this.edits_from_lsp(
3878                                &buffer_to_edit,
3879                                edits,
3880                                op.text_document.version,
3881                                cx,
3882                            )
3883                        })
3884                        .await?;
3885
3886                    let transaction = buffer_to_edit.update(cx, |buffer, cx| {
3887                        buffer.finalize_last_transaction();
3888                        buffer.start_transaction();
3889                        for (range, text) in edits {
3890                            buffer.edit([(range, text)], None, cx);
3891                        }
3892                        let transaction = if buffer.end_transaction(cx).is_some() {
3893                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
3894                            if !push_to_history {
3895                                buffer.forget_transaction(transaction.id);
3896                            }
3897                            Some(transaction)
3898                        } else {
3899                            None
3900                        };
3901
3902                        transaction
3903                    });
3904                    if let Some(transaction) = transaction {
3905                        project_transaction.0.insert(buffer_to_edit, transaction);
3906                    }
3907                }
3908            }
3909        }
3910
3911        Ok(project_transaction)
3912    }
3913
3914    pub fn prepare_rename<T: ToPointUtf16>(
3915        &self,
3916        buffer: ModelHandle<Buffer>,
3917        position: T,
3918        cx: &mut ModelContext<Self>,
3919    ) -> Task<Result<Option<Range<Anchor>>>> {
3920        let position = position.to_point_utf16(buffer.read(cx));
3921        self.request_lsp(buffer, PrepareRename { position }, cx)
3922    }
3923
3924    pub fn perform_rename<T: ToPointUtf16>(
3925        &self,
3926        buffer: ModelHandle<Buffer>,
3927        position: T,
3928        new_name: String,
3929        push_to_history: bool,
3930        cx: &mut ModelContext<Self>,
3931    ) -> Task<Result<ProjectTransaction>> {
3932        let position = position.to_point_utf16(buffer.read(cx));
3933        self.request_lsp(
3934            buffer,
3935            PerformRename {
3936                position,
3937                new_name,
3938                push_to_history,
3939            },
3940            cx,
3941        )
3942    }
3943
3944    #[allow(clippy::type_complexity)]
3945    pub fn search(
3946        &self,
3947        query: SearchQuery,
3948        cx: &mut ModelContext<Self>,
3949    ) -> Task<Result<HashMap<ModelHandle<Buffer>, Vec<Range<Anchor>>>>> {
3950        if self.is_local() {
3951            let snapshots = self
3952                .visible_worktrees(cx)
3953                .filter_map(|tree| {
3954                    let tree = tree.read(cx).as_local()?;
3955                    Some(tree.snapshot())
3956                })
3957                .collect::<Vec<_>>();
3958
3959            let background = cx.background().clone();
3960            let path_count: usize = snapshots.iter().map(|s| s.visible_file_count()).sum();
3961            if path_count == 0 {
3962                return Task::ready(Ok(Default::default()));
3963            }
3964            let workers = background.num_cpus().min(path_count);
3965            let (matching_paths_tx, mut matching_paths_rx) = smol::channel::bounded(1024);
3966            cx.background()
3967                .spawn({
3968                    let fs = self.fs.clone();
3969                    let background = cx.background().clone();
3970                    let query = query.clone();
3971                    async move {
3972                        let fs = &fs;
3973                        let query = &query;
3974                        let matching_paths_tx = &matching_paths_tx;
3975                        let paths_per_worker = (path_count + workers - 1) / workers;
3976                        let snapshots = &snapshots;
3977                        background
3978                            .scoped(|scope| {
3979                                for worker_ix in 0..workers {
3980                                    let worker_start_ix = worker_ix * paths_per_worker;
3981                                    let worker_end_ix = worker_start_ix + paths_per_worker;
3982                                    scope.spawn(async move {
3983                                        let mut snapshot_start_ix = 0;
3984                                        let mut abs_path = PathBuf::new();
3985                                        for snapshot in snapshots {
3986                                            let snapshot_end_ix =
3987                                                snapshot_start_ix + snapshot.visible_file_count();
3988                                            if worker_end_ix <= snapshot_start_ix {
3989                                                break;
3990                                            } else if worker_start_ix > snapshot_end_ix {
3991                                                snapshot_start_ix = snapshot_end_ix;
3992                                                continue;
3993                                            } else {
3994                                                let start_in_snapshot = worker_start_ix
3995                                                    .saturating_sub(snapshot_start_ix);
3996                                                let end_in_snapshot =
3997                                                    cmp::min(worker_end_ix, snapshot_end_ix)
3998                                                        - snapshot_start_ix;
3999
4000                                                for entry in snapshot
4001                                                    .files(false, start_in_snapshot)
4002                                                    .take(end_in_snapshot - start_in_snapshot)
4003                                                {
4004                                                    if matching_paths_tx.is_closed() {
4005                                                        break;
4006                                                    }
4007
4008                                                    abs_path.clear();
4009                                                    abs_path.push(&snapshot.abs_path());
4010                                                    abs_path.push(&entry.path);
4011                                                    let matches = if let Some(file) =
4012                                                        fs.open_sync(&abs_path).await.log_err()
4013                                                    {
4014                                                        query.detect(file).unwrap_or(false)
4015                                                    } else {
4016                                                        false
4017                                                    };
4018
4019                                                    if matches {
4020                                                        let project_path =
4021                                                            (snapshot.id(), entry.path.clone());
4022                                                        if matching_paths_tx
4023                                                            .send(project_path)
4024                                                            .await
4025                                                            .is_err()
4026                                                        {
4027                                                            break;
4028                                                        }
4029                                                    }
4030                                                }
4031
4032                                                snapshot_start_ix = snapshot_end_ix;
4033                                            }
4034                                        }
4035                                    });
4036                                }
4037                            })
4038                            .await;
4039                    }
4040                })
4041                .detach();
4042
4043            let (buffers_tx, buffers_rx) = smol::channel::bounded(1024);
4044            let open_buffers = self
4045                .opened_buffers
4046                .values()
4047                .filter_map(|b| b.upgrade(cx))
4048                .collect::<HashSet<_>>();
4049            cx.spawn(|this, cx| async move {
4050                for buffer in &open_buffers {
4051                    let snapshot = buffer.read_with(&cx, |buffer, _| buffer.snapshot());
4052                    buffers_tx.send((buffer.clone(), snapshot)).await?;
4053                }
4054
4055                let open_buffers = Rc::new(RefCell::new(open_buffers));
4056                while let Some(project_path) = matching_paths_rx.next().await {
4057                    if buffers_tx.is_closed() {
4058                        break;
4059                    }
4060
4061                    let this = this.clone();
4062                    let open_buffers = open_buffers.clone();
4063                    let buffers_tx = buffers_tx.clone();
4064                    cx.spawn(|mut cx| async move {
4065                        if let Some(buffer) = this
4066                            .update(&mut cx, |this, cx| this.open_buffer(project_path, cx))
4067                            .await
4068                            .log_err()
4069                        {
4070                            if open_buffers.borrow_mut().insert(buffer.clone()) {
4071                                let snapshot = buffer.read_with(&cx, |buffer, _| buffer.snapshot());
4072                                buffers_tx.send((buffer, snapshot)).await?;
4073                            }
4074                        }
4075
4076                        Ok::<_, anyhow::Error>(())
4077                    })
4078                    .detach();
4079                }
4080
4081                Ok::<_, anyhow::Error>(())
4082            })
4083            .detach_and_log_err(cx);
4084
4085            let background = cx.background().clone();
4086            cx.background().spawn(async move {
4087                let query = &query;
4088                let mut matched_buffers = Vec::new();
4089                for _ in 0..workers {
4090                    matched_buffers.push(HashMap::default());
4091                }
4092                background
4093                    .scoped(|scope| {
4094                        for worker_matched_buffers in matched_buffers.iter_mut() {
4095                            let mut buffers_rx = buffers_rx.clone();
4096                            scope.spawn(async move {
4097                                while let Some((buffer, snapshot)) = buffers_rx.next().await {
4098                                    let buffer_matches = query
4099                                        .search(snapshot.as_rope())
4100                                        .await
4101                                        .iter()
4102                                        .map(|range| {
4103                                            snapshot.anchor_before(range.start)
4104                                                ..snapshot.anchor_after(range.end)
4105                                        })
4106                                        .collect::<Vec<_>>();
4107                                    if !buffer_matches.is_empty() {
4108                                        worker_matched_buffers
4109                                            .insert(buffer.clone(), buffer_matches);
4110                                    }
4111                                }
4112                            });
4113                        }
4114                    })
4115                    .await;
4116                Ok(matched_buffers.into_iter().flatten().collect())
4117            })
4118        } else if let Some(project_id) = self.remote_id() {
4119            let request = self.client.request(query.to_proto(project_id));
4120            cx.spawn(|this, mut cx| async move {
4121                let response = request.await?;
4122                let mut result = HashMap::default();
4123                for location in response.locations {
4124                    let target_buffer = this
4125                        .update(&mut cx, |this, cx| {
4126                            this.wait_for_buffer(location.buffer_id, cx)
4127                        })
4128                        .await?;
4129                    let start = location
4130                        .start
4131                        .and_then(deserialize_anchor)
4132                        .ok_or_else(|| anyhow!("missing target start"))?;
4133                    let end = location
4134                        .end
4135                        .and_then(deserialize_anchor)
4136                        .ok_or_else(|| anyhow!("missing target end"))?;
4137                    result
4138                        .entry(target_buffer)
4139                        .or_insert(Vec::new())
4140                        .push(start..end)
4141                }
4142                Ok(result)
4143            })
4144        } else {
4145            Task::ready(Ok(Default::default()))
4146        }
4147    }
4148
4149    fn request_lsp<R: LspCommand>(
4150        &self,
4151        buffer_handle: ModelHandle<Buffer>,
4152        request: R,
4153        cx: &mut ModelContext<Self>,
4154    ) -> Task<Result<R::Response>>
4155    where
4156        <R::LspRequest as lsp::request::Request>::Result: Send,
4157    {
4158        let buffer = buffer_handle.read(cx);
4159        if self.is_local() {
4160            let file = File::from_dyn(buffer.file()).and_then(File::as_local);
4161            if let Some((file, language_server)) = file.zip(
4162                self.language_server_for_buffer(buffer, cx)
4163                    .map(|(_, server)| server.clone()),
4164            ) {
4165                let lsp_params = request.to_lsp(&file.abs_path(cx), cx);
4166                return cx.spawn(|this, cx| async move {
4167                    if !request.check_capabilities(language_server.capabilities()) {
4168                        return Ok(Default::default());
4169                    }
4170
4171                    let response = language_server
4172                        .request::<R::LspRequest>(lsp_params)
4173                        .await
4174                        .context("lsp request failed")?;
4175                    request
4176                        .response_from_lsp(response, this, buffer_handle, cx)
4177                        .await
4178                });
4179            }
4180        } else if let Some(project_id) = self.remote_id() {
4181            let rpc = self.client.clone();
4182            let message = request.to_proto(project_id, buffer);
4183            return cx.spawn(|this, cx| async move {
4184                let response = rpc.request(message).await?;
4185                if this.read_with(&cx, |this, _| this.is_read_only()) {
4186                    Err(anyhow!("disconnected before completing request"))
4187                } else {
4188                    request
4189                        .response_from_proto(response, this, buffer_handle, cx)
4190                        .await
4191                }
4192            });
4193        }
4194        Task::ready(Ok(Default::default()))
4195    }
4196
4197    pub fn find_or_create_local_worktree(
4198        &mut self,
4199        abs_path: impl AsRef<Path>,
4200        visible: bool,
4201        cx: &mut ModelContext<Self>,
4202    ) -> Task<Result<(ModelHandle<Worktree>, PathBuf)>> {
4203        let abs_path = abs_path.as_ref();
4204        if let Some((tree, relative_path)) = self.find_local_worktree(abs_path, cx) {
4205            Task::ready(Ok((tree, relative_path)))
4206        } else {
4207            let worktree = self.create_local_worktree(abs_path, visible, cx);
4208            cx.foreground()
4209                .spawn(async move { Ok((worktree.await?, PathBuf::new())) })
4210        }
4211    }
4212
4213    pub fn find_local_worktree(
4214        &self,
4215        abs_path: &Path,
4216        cx: &AppContext,
4217    ) -> Option<(ModelHandle<Worktree>, PathBuf)> {
4218        for tree in &self.worktrees {
4219            if let Some(tree) = tree.upgrade(cx) {
4220                if let Some(relative_path) = tree
4221                    .read(cx)
4222                    .as_local()
4223                    .and_then(|t| abs_path.strip_prefix(t.abs_path()).ok())
4224                {
4225                    return Some((tree.clone(), relative_path.into()));
4226                }
4227            }
4228        }
4229        None
4230    }
4231
4232    pub fn is_shared(&self) -> bool {
4233        match &self.client_state {
4234            Some(ProjectClientState::Local { .. }) => true,
4235            _ => false,
4236        }
4237    }
4238
4239    fn create_local_worktree(
4240        &mut self,
4241        abs_path: impl AsRef<Path>,
4242        visible: bool,
4243        cx: &mut ModelContext<Self>,
4244    ) -> Task<Result<ModelHandle<Worktree>>> {
4245        let fs = self.fs.clone();
4246        let client = self.client.clone();
4247        let next_entry_id = self.next_entry_id.clone();
4248        let path: Arc<Path> = abs_path.as_ref().into();
4249        let task = self
4250            .loading_local_worktrees
4251            .entry(path.clone())
4252            .or_insert_with(|| {
4253                cx.spawn(|project, mut cx| {
4254                    async move {
4255                        let worktree = Worktree::local(
4256                            client.clone(),
4257                            path.clone(),
4258                            visible,
4259                            fs,
4260                            next_entry_id,
4261                            &mut cx,
4262                        )
4263                        .await;
4264                        project.update(&mut cx, |project, _| {
4265                            project.loading_local_worktrees.remove(&path);
4266                        });
4267                        let worktree = worktree?;
4268
4269                        project
4270                            .update(&mut cx, |project, cx| project.add_worktree(&worktree, cx))
4271                            .await;
4272
4273                        if let Some(project_id) =
4274                            project.read_with(&cx, |project, _| project.remote_id())
4275                        {
4276                            worktree
4277                                .update(&mut cx, |worktree, cx| {
4278                                    worktree.as_local_mut().unwrap().share(project_id, cx)
4279                                })
4280                                .await
4281                                .log_err();
4282                        }
4283
4284                        Ok(worktree)
4285                    }
4286                    .map_err(Arc::new)
4287                })
4288                .shared()
4289            })
4290            .clone();
4291        cx.foreground().spawn(async move {
4292            match task.await {
4293                Ok(worktree) => Ok(worktree),
4294                Err(err) => Err(anyhow!("{}", err)),
4295            }
4296        })
4297    }
4298
4299    pub fn remove_worktree(
4300        &mut self,
4301        id_to_remove: WorktreeId,
4302        cx: &mut ModelContext<Self>,
4303    ) -> impl Future<Output = ()> {
4304        self.worktrees.retain(|worktree| {
4305            if let Some(worktree) = worktree.upgrade(cx) {
4306                let id = worktree.read(cx).id();
4307                if id == id_to_remove {
4308                    cx.emit(Event::WorktreeRemoved(id));
4309                    false
4310                } else {
4311                    true
4312                }
4313            } else {
4314                false
4315            }
4316        });
4317        self.metadata_changed(cx)
4318    }
4319
4320    fn add_worktree(
4321        &mut self,
4322        worktree: &ModelHandle<Worktree>,
4323        cx: &mut ModelContext<Self>,
4324    ) -> impl Future<Output = ()> {
4325        cx.observe(worktree, |_, _, cx| cx.notify()).detach();
4326        if worktree.read(cx).is_local() {
4327            cx.subscribe(worktree, |this, worktree, event, cx| match event {
4328                worktree::Event::UpdatedEntries => this.update_local_worktree_buffers(worktree, cx),
4329                worktree::Event::UpdatedGitRepositories(updated_repos) => {
4330                    this.update_local_worktree_buffers_git_repos(worktree, updated_repos, cx)
4331                }
4332            })
4333            .detach();
4334        }
4335
4336        let push_strong_handle = {
4337            let worktree = worktree.read(cx);
4338            self.is_shared() || worktree.is_visible() || worktree.is_remote()
4339        };
4340        if push_strong_handle {
4341            self.worktrees
4342                .push(WorktreeHandle::Strong(worktree.clone()));
4343        } else {
4344            self.worktrees
4345                .push(WorktreeHandle::Weak(worktree.downgrade()));
4346        }
4347
4348        cx.observe_release(worktree, |this, worktree, cx| {
4349            let _ = this.remove_worktree(worktree.id(), cx);
4350        })
4351        .detach();
4352
4353        cx.emit(Event::WorktreeAdded);
4354        self.metadata_changed(cx)
4355    }
4356
4357    fn update_local_worktree_buffers(
4358        &mut self,
4359        worktree_handle: ModelHandle<Worktree>,
4360        cx: &mut ModelContext<Self>,
4361    ) {
4362        let snapshot = worktree_handle.read(cx).snapshot();
4363        let mut buffers_to_delete = Vec::new();
4364        let mut renamed_buffers = Vec::new();
4365        for (buffer_id, buffer) in &self.opened_buffers {
4366            if let Some(buffer) = buffer.upgrade(cx) {
4367                buffer.update(cx, |buffer, cx| {
4368                    if let Some(old_file) = File::from_dyn(buffer.file()) {
4369                        if old_file.worktree != worktree_handle {
4370                            return;
4371                        }
4372
4373                        let new_file = if let Some(entry) = snapshot.entry_for_id(old_file.entry_id)
4374                        {
4375                            File {
4376                                is_local: true,
4377                                entry_id: entry.id,
4378                                mtime: entry.mtime,
4379                                path: entry.path.clone(),
4380                                worktree: worktree_handle.clone(),
4381                                is_deleted: false,
4382                            }
4383                        } else if let Some(entry) =
4384                            snapshot.entry_for_path(old_file.path().as_ref())
4385                        {
4386                            File {
4387                                is_local: true,
4388                                entry_id: entry.id,
4389                                mtime: entry.mtime,
4390                                path: entry.path.clone(),
4391                                worktree: worktree_handle.clone(),
4392                                is_deleted: false,
4393                            }
4394                        } else {
4395                            File {
4396                                is_local: true,
4397                                entry_id: old_file.entry_id,
4398                                path: old_file.path().clone(),
4399                                mtime: old_file.mtime(),
4400                                worktree: worktree_handle.clone(),
4401                                is_deleted: true,
4402                            }
4403                        };
4404
4405                        let old_path = old_file.abs_path(cx);
4406                        if new_file.abs_path(cx) != old_path {
4407                            renamed_buffers.push((cx.handle(), old_path));
4408                        }
4409
4410                        if let Some(project_id) = self.remote_id() {
4411                            self.client
4412                                .send(proto::UpdateBufferFile {
4413                                    project_id,
4414                                    buffer_id: *buffer_id as u64,
4415                                    file: Some(new_file.to_proto()),
4416                                })
4417                                .log_err();
4418                        }
4419                        buffer.file_updated(Arc::new(new_file), cx).detach();
4420                    }
4421                });
4422            } else {
4423                buffers_to_delete.push(*buffer_id);
4424            }
4425        }
4426
4427        for buffer_id in buffers_to_delete {
4428            self.opened_buffers.remove(&buffer_id);
4429        }
4430
4431        for (buffer, old_path) in renamed_buffers {
4432            self.unregister_buffer_from_language_server(&buffer, old_path, cx);
4433            self.assign_language_to_buffer(&buffer, cx);
4434            self.register_buffer_with_language_server(&buffer, cx);
4435        }
4436    }
4437
4438    fn update_local_worktree_buffers_git_repos(
4439        &mut self,
4440        worktree: ModelHandle<Worktree>,
4441        repos: &[GitRepositoryEntry],
4442        cx: &mut ModelContext<Self>,
4443    ) {
4444        for (_, buffer) in &self.opened_buffers {
4445            if let Some(buffer) = buffer.upgrade(cx) {
4446                let file = match File::from_dyn(buffer.read(cx).file()) {
4447                    Some(file) => file,
4448                    None => continue,
4449                };
4450                if file.worktree != worktree {
4451                    continue;
4452                }
4453
4454                let path = file.path().clone();
4455
4456                let repo = match repos.iter().find(|repo| repo.manages(&path)) {
4457                    Some(repo) => repo.clone(),
4458                    None => return,
4459                };
4460
4461                let relative_repo = match path.strip_prefix(repo.content_path) {
4462                    Ok(relative_repo) => relative_repo.to_owned(),
4463                    Err(_) => return,
4464                };
4465
4466                let remote_id = self.remote_id();
4467                let client = self.client.clone();
4468
4469                cx.spawn(|_, mut cx| async move {
4470                    let diff_base = cx
4471                        .background()
4472                        .spawn(async move { repo.repo.lock().load_index_text(&relative_repo) })
4473                        .await;
4474
4475                    let buffer_id = buffer.update(&mut cx, |buffer, cx| {
4476                        buffer.set_diff_base(diff_base.clone(), cx);
4477                        buffer.remote_id()
4478                    });
4479
4480                    if let Some(project_id) = remote_id {
4481                        client
4482                            .send(proto::UpdateDiffBase {
4483                                project_id,
4484                                buffer_id: buffer_id as u64,
4485                                diff_base,
4486                            })
4487                            .log_err();
4488                    }
4489                })
4490                .detach();
4491            }
4492        }
4493    }
4494
4495    pub fn set_active_path(&mut self, entry: Option<ProjectPath>, cx: &mut ModelContext<Self>) {
4496        let new_active_entry = entry.and_then(|project_path| {
4497            let worktree = self.worktree_for_id(project_path.worktree_id, cx)?;
4498            let entry = worktree.read(cx).entry_for_path(project_path.path)?;
4499            Some(entry.id)
4500        });
4501        if new_active_entry != self.active_entry {
4502            self.active_entry = new_active_entry;
4503            cx.emit(Event::ActiveEntryChanged(new_active_entry));
4504        }
4505    }
4506
4507    pub fn language_servers_running_disk_based_diagnostics(
4508        &self,
4509    ) -> impl Iterator<Item = usize> + '_ {
4510        self.language_server_statuses
4511            .iter()
4512            .filter_map(|(id, status)| {
4513                if status.has_pending_diagnostic_updates {
4514                    Some(*id)
4515                } else {
4516                    None
4517                }
4518            })
4519    }
4520
4521    pub fn diagnostic_summary(&self, cx: &AppContext) -> DiagnosticSummary {
4522        let mut summary = DiagnosticSummary::default();
4523        for (_, path_summary) in self.diagnostic_summaries(cx) {
4524            summary.error_count += path_summary.error_count;
4525            summary.warning_count += path_summary.warning_count;
4526        }
4527        summary
4528    }
4529
4530    pub fn diagnostic_summaries<'a>(
4531        &'a self,
4532        cx: &'a AppContext,
4533    ) -> impl Iterator<Item = (ProjectPath, DiagnosticSummary)> + 'a {
4534        self.visible_worktrees(cx).flat_map(move |worktree| {
4535            let worktree = worktree.read(cx);
4536            let worktree_id = worktree.id();
4537            worktree
4538                .diagnostic_summaries()
4539                .map(move |(path, summary)| (ProjectPath { worktree_id, path }, summary))
4540        })
4541    }
4542
4543    pub fn disk_based_diagnostics_started(
4544        &mut self,
4545        language_server_id: usize,
4546        cx: &mut ModelContext<Self>,
4547    ) {
4548        cx.emit(Event::DiskBasedDiagnosticsStarted { language_server_id });
4549    }
4550
4551    pub fn disk_based_diagnostics_finished(
4552        &mut self,
4553        language_server_id: usize,
4554        cx: &mut ModelContext<Self>,
4555    ) {
4556        cx.emit(Event::DiskBasedDiagnosticsFinished { language_server_id });
4557    }
4558
4559    pub fn active_entry(&self) -> Option<ProjectEntryId> {
4560        self.active_entry
4561    }
4562
4563    pub fn entry_for_path(&self, path: &ProjectPath, cx: &AppContext) -> Option<Entry> {
4564        self.worktree_for_id(path.worktree_id, cx)?
4565            .read(cx)
4566            .entry_for_path(&path.path)
4567            .cloned()
4568    }
4569
4570    pub fn path_for_entry(&self, entry_id: ProjectEntryId, cx: &AppContext) -> Option<ProjectPath> {
4571        let worktree = self.worktree_for_entry(entry_id, cx)?;
4572        let worktree = worktree.read(cx);
4573        let worktree_id = worktree.id();
4574        let path = worktree.entry_for_id(entry_id)?.path.clone();
4575        Some(ProjectPath { worktree_id, path })
4576    }
4577
4578    // RPC message handlers
4579
4580    async fn handle_unshare_project(
4581        this: ModelHandle<Self>,
4582        _: TypedEnvelope<proto::UnshareProject>,
4583        _: Arc<Client>,
4584        mut cx: AsyncAppContext,
4585    ) -> Result<()> {
4586        this.update(&mut cx, |this, cx| {
4587            if this.is_local() {
4588                this.unshare(cx)?;
4589            } else {
4590                this.disconnected_from_host(cx);
4591            }
4592            Ok(())
4593        })
4594    }
4595
4596    async fn handle_add_collaborator(
4597        this: ModelHandle<Self>,
4598        mut envelope: TypedEnvelope<proto::AddProjectCollaborator>,
4599        _: Arc<Client>,
4600        mut cx: AsyncAppContext,
4601    ) -> Result<()> {
4602        let collaborator = envelope
4603            .payload
4604            .collaborator
4605            .take()
4606            .ok_or_else(|| anyhow!("empty collaborator"))?;
4607
4608        let collaborator = Collaborator::from_proto(collaborator)?;
4609        this.update(&mut cx, |this, cx| {
4610            this.collaborators
4611                .insert(collaborator.peer_id, collaborator);
4612            cx.notify();
4613        });
4614
4615        Ok(())
4616    }
4617
4618    async fn handle_remove_collaborator(
4619        this: ModelHandle<Self>,
4620        envelope: TypedEnvelope<proto::RemoveProjectCollaborator>,
4621        _: Arc<Client>,
4622        mut cx: AsyncAppContext,
4623    ) -> Result<()> {
4624        this.update(&mut cx, |this, cx| {
4625            let peer_id = envelope
4626                .payload
4627                .peer_id
4628                .ok_or_else(|| anyhow!("invalid peer id"))?;
4629            let replica_id = this
4630                .collaborators
4631                .remove(&peer_id)
4632                .ok_or_else(|| anyhow!("unknown peer {:?}", peer_id))?
4633                .replica_id;
4634            for buffer in this.opened_buffers.values() {
4635                if let Some(buffer) = buffer.upgrade(cx) {
4636                    buffer.update(cx, |buffer, cx| buffer.remove_peer(replica_id, cx));
4637                }
4638            }
4639            this.shared_buffers.remove(&peer_id);
4640
4641            cx.emit(Event::CollaboratorLeft(peer_id));
4642            cx.notify();
4643            Ok(())
4644        })
4645    }
4646
4647    async fn handle_update_project(
4648        this: ModelHandle<Self>,
4649        envelope: TypedEnvelope<proto::UpdateProject>,
4650        client: Arc<Client>,
4651        mut cx: AsyncAppContext,
4652    ) -> Result<()> {
4653        this.update(&mut cx, |this, cx| {
4654            let replica_id = this.replica_id();
4655            let remote_id = this.remote_id().ok_or_else(|| anyhow!("invalid project"))?;
4656
4657            let mut old_worktrees_by_id = this
4658                .worktrees
4659                .drain(..)
4660                .filter_map(|worktree| {
4661                    let worktree = worktree.upgrade(cx)?;
4662                    Some((worktree.read(cx).id(), worktree))
4663                })
4664                .collect::<HashMap<_, _>>();
4665
4666            for worktree in envelope.payload.worktrees {
4667                if let Some(old_worktree) =
4668                    old_worktrees_by_id.remove(&WorktreeId::from_proto(worktree.id))
4669                {
4670                    this.worktrees.push(WorktreeHandle::Strong(old_worktree));
4671                } else {
4672                    let worktree =
4673                        Worktree::remote(remote_id, replica_id, worktree, client.clone(), cx);
4674                    let _ = this.add_worktree(&worktree, cx);
4675                }
4676            }
4677
4678            let _ = this.metadata_changed(cx);
4679            for (id, _) in old_worktrees_by_id {
4680                cx.emit(Event::WorktreeRemoved(id));
4681            }
4682
4683            Ok(())
4684        })
4685    }
4686
4687    async fn handle_update_worktree(
4688        this: ModelHandle<Self>,
4689        envelope: TypedEnvelope<proto::UpdateWorktree>,
4690        _: Arc<Client>,
4691        mut cx: AsyncAppContext,
4692    ) -> Result<()> {
4693        this.update(&mut cx, |this, cx| {
4694            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
4695            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
4696                worktree.update(cx, |worktree, _| {
4697                    let worktree = worktree.as_remote_mut().unwrap();
4698                    worktree.update_from_remote(envelope.payload);
4699                });
4700            }
4701            Ok(())
4702        })
4703    }
4704
4705    async fn handle_create_project_entry(
4706        this: ModelHandle<Self>,
4707        envelope: TypedEnvelope<proto::CreateProjectEntry>,
4708        _: Arc<Client>,
4709        mut cx: AsyncAppContext,
4710    ) -> Result<proto::ProjectEntryResponse> {
4711        let worktree = this.update(&mut cx, |this, cx| {
4712            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
4713            this.worktree_for_id(worktree_id, cx)
4714                .ok_or_else(|| anyhow!("worktree not found"))
4715        })?;
4716        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
4717        let entry = worktree
4718            .update(&mut cx, |worktree, cx| {
4719                let worktree = worktree.as_local_mut().unwrap();
4720                let path = PathBuf::from(envelope.payload.path);
4721                worktree.create_entry(path, envelope.payload.is_directory, cx)
4722            })
4723            .await?;
4724        Ok(proto::ProjectEntryResponse {
4725            entry: Some((&entry).into()),
4726            worktree_scan_id: worktree_scan_id as u64,
4727        })
4728    }
4729
4730    async fn handle_rename_project_entry(
4731        this: ModelHandle<Self>,
4732        envelope: TypedEnvelope<proto::RenameProjectEntry>,
4733        _: Arc<Client>,
4734        mut cx: AsyncAppContext,
4735    ) -> Result<proto::ProjectEntryResponse> {
4736        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
4737        let worktree = this.read_with(&cx, |this, cx| {
4738            this.worktree_for_entry(entry_id, cx)
4739                .ok_or_else(|| anyhow!("worktree not found"))
4740        })?;
4741        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
4742        let entry = worktree
4743            .update(&mut cx, |worktree, cx| {
4744                let new_path = PathBuf::from(envelope.payload.new_path);
4745                worktree
4746                    .as_local_mut()
4747                    .unwrap()
4748                    .rename_entry(entry_id, new_path, cx)
4749                    .ok_or_else(|| anyhow!("invalid entry"))
4750            })?
4751            .await?;
4752        Ok(proto::ProjectEntryResponse {
4753            entry: Some((&entry).into()),
4754            worktree_scan_id: worktree_scan_id as u64,
4755        })
4756    }
4757
4758    async fn handle_copy_project_entry(
4759        this: ModelHandle<Self>,
4760        envelope: TypedEnvelope<proto::CopyProjectEntry>,
4761        _: Arc<Client>,
4762        mut cx: AsyncAppContext,
4763    ) -> Result<proto::ProjectEntryResponse> {
4764        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
4765        let worktree = this.read_with(&cx, |this, cx| {
4766            this.worktree_for_entry(entry_id, cx)
4767                .ok_or_else(|| anyhow!("worktree not found"))
4768        })?;
4769        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
4770        let entry = worktree
4771            .update(&mut cx, |worktree, cx| {
4772                let new_path = PathBuf::from(envelope.payload.new_path);
4773                worktree
4774                    .as_local_mut()
4775                    .unwrap()
4776                    .copy_entry(entry_id, new_path, cx)
4777                    .ok_or_else(|| anyhow!("invalid entry"))
4778            })?
4779            .await?;
4780        Ok(proto::ProjectEntryResponse {
4781            entry: Some((&entry).into()),
4782            worktree_scan_id: worktree_scan_id as u64,
4783        })
4784    }
4785
4786    async fn handle_delete_project_entry(
4787        this: ModelHandle<Self>,
4788        envelope: TypedEnvelope<proto::DeleteProjectEntry>,
4789        _: Arc<Client>,
4790        mut cx: AsyncAppContext,
4791    ) -> Result<proto::ProjectEntryResponse> {
4792        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
4793        let worktree = this.read_with(&cx, |this, cx| {
4794            this.worktree_for_entry(entry_id, cx)
4795                .ok_or_else(|| anyhow!("worktree not found"))
4796        })?;
4797        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
4798        worktree
4799            .update(&mut cx, |worktree, cx| {
4800                worktree
4801                    .as_local_mut()
4802                    .unwrap()
4803                    .delete_entry(entry_id, cx)
4804                    .ok_or_else(|| anyhow!("invalid entry"))
4805            })?
4806            .await?;
4807        Ok(proto::ProjectEntryResponse {
4808            entry: None,
4809            worktree_scan_id: worktree_scan_id as u64,
4810        })
4811    }
4812
4813    async fn handle_update_diagnostic_summary(
4814        this: ModelHandle<Self>,
4815        envelope: TypedEnvelope<proto::UpdateDiagnosticSummary>,
4816        _: Arc<Client>,
4817        mut cx: AsyncAppContext,
4818    ) -> Result<()> {
4819        this.update(&mut cx, |this, cx| {
4820            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
4821            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
4822                if let Some(summary) = envelope.payload.summary {
4823                    let project_path = ProjectPath {
4824                        worktree_id,
4825                        path: Path::new(&summary.path).into(),
4826                    };
4827                    worktree.update(cx, |worktree, _| {
4828                        worktree
4829                            .as_remote_mut()
4830                            .unwrap()
4831                            .update_diagnostic_summary(project_path.path.clone(), &summary);
4832                    });
4833                    cx.emit(Event::DiagnosticsUpdated {
4834                        language_server_id: summary.language_server_id as usize,
4835                        path: project_path,
4836                    });
4837                }
4838            }
4839            Ok(())
4840        })
4841    }
4842
4843    async fn handle_start_language_server(
4844        this: ModelHandle<Self>,
4845        envelope: TypedEnvelope<proto::StartLanguageServer>,
4846        _: Arc<Client>,
4847        mut cx: AsyncAppContext,
4848    ) -> Result<()> {
4849        let server = envelope
4850            .payload
4851            .server
4852            .ok_or_else(|| anyhow!("invalid server"))?;
4853        this.update(&mut cx, |this, cx| {
4854            this.language_server_statuses.insert(
4855                server.id as usize,
4856                LanguageServerStatus {
4857                    name: server.name,
4858                    pending_work: Default::default(),
4859                    has_pending_diagnostic_updates: false,
4860                    progress_tokens: Default::default(),
4861                },
4862            );
4863            cx.notify();
4864        });
4865        Ok(())
4866    }
4867
4868    async fn handle_update_language_server(
4869        this: ModelHandle<Self>,
4870        envelope: TypedEnvelope<proto::UpdateLanguageServer>,
4871        _: Arc<Client>,
4872        mut cx: AsyncAppContext,
4873    ) -> Result<()> {
4874        let language_server_id = envelope.payload.language_server_id as usize;
4875        match envelope
4876            .payload
4877            .variant
4878            .ok_or_else(|| anyhow!("invalid variant"))?
4879        {
4880            proto::update_language_server::Variant::WorkStart(payload) => {
4881                this.update(&mut cx, |this, cx| {
4882                    this.on_lsp_work_start(
4883                        language_server_id,
4884                        payload.token,
4885                        LanguageServerProgress {
4886                            message: payload.message,
4887                            percentage: payload.percentage.map(|p| p as usize),
4888                            last_update_at: Instant::now(),
4889                        },
4890                        cx,
4891                    );
4892                })
4893            }
4894            proto::update_language_server::Variant::WorkProgress(payload) => {
4895                this.update(&mut cx, |this, cx| {
4896                    this.on_lsp_work_progress(
4897                        language_server_id,
4898                        payload.token,
4899                        LanguageServerProgress {
4900                            message: payload.message,
4901                            percentage: payload.percentage.map(|p| p as usize),
4902                            last_update_at: Instant::now(),
4903                        },
4904                        cx,
4905                    );
4906                })
4907            }
4908            proto::update_language_server::Variant::WorkEnd(payload) => {
4909                this.update(&mut cx, |this, cx| {
4910                    this.on_lsp_work_end(language_server_id, payload.token, cx);
4911                })
4912            }
4913            proto::update_language_server::Variant::DiskBasedDiagnosticsUpdating(_) => {
4914                this.update(&mut cx, |this, cx| {
4915                    this.disk_based_diagnostics_started(language_server_id, cx);
4916                })
4917            }
4918            proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(_) => {
4919                this.update(&mut cx, |this, cx| {
4920                    this.disk_based_diagnostics_finished(language_server_id, cx)
4921                });
4922            }
4923        }
4924
4925        Ok(())
4926    }
4927
4928    async fn handle_update_buffer(
4929        this: ModelHandle<Self>,
4930        envelope: TypedEnvelope<proto::UpdateBuffer>,
4931        _: Arc<Client>,
4932        mut cx: AsyncAppContext,
4933    ) -> Result<()> {
4934        this.update(&mut cx, |this, cx| {
4935            let payload = envelope.payload.clone();
4936            let buffer_id = payload.buffer_id;
4937            let ops = payload
4938                .operations
4939                .into_iter()
4940                .map(language::proto::deserialize_operation)
4941                .collect::<Result<Vec<_>, _>>()?;
4942            let is_remote = this.is_remote();
4943            match this.opened_buffers.entry(buffer_id) {
4944                hash_map::Entry::Occupied(mut e) => match e.get_mut() {
4945                    OpenBuffer::Strong(buffer) => {
4946                        buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx))?;
4947                    }
4948                    OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
4949                    OpenBuffer::Weak(_) => {}
4950                },
4951                hash_map::Entry::Vacant(e) => {
4952                    assert!(
4953                        is_remote,
4954                        "received buffer update from {:?}",
4955                        envelope.original_sender_id
4956                    );
4957                    e.insert(OpenBuffer::Operations(ops));
4958                }
4959            }
4960            Ok(())
4961        })
4962    }
4963
4964    async fn handle_create_buffer_for_peer(
4965        this: ModelHandle<Self>,
4966        envelope: TypedEnvelope<proto::CreateBufferForPeer>,
4967        _: Arc<Client>,
4968        mut cx: AsyncAppContext,
4969    ) -> Result<()> {
4970        this.update(&mut cx, |this, cx| {
4971            match envelope
4972                .payload
4973                .variant
4974                .ok_or_else(|| anyhow!("missing variant"))?
4975            {
4976                proto::create_buffer_for_peer::Variant::State(mut state) => {
4977                    let mut buffer_file = None;
4978                    if let Some(file) = state.file.take() {
4979                        let worktree_id = WorktreeId::from_proto(file.worktree_id);
4980                        let worktree = this.worktree_for_id(worktree_id, cx).ok_or_else(|| {
4981                            anyhow!("no worktree found for id {}", file.worktree_id)
4982                        })?;
4983                        buffer_file = Some(Arc::new(File::from_proto(file, worktree.clone(), cx)?)
4984                            as Arc<dyn language::File>);
4985                    }
4986
4987                    let buffer_id = state.id;
4988                    let buffer = cx.add_model(|_| {
4989                        Buffer::from_proto(this.replica_id(), state, buffer_file).unwrap()
4990                    });
4991                    this.incomplete_buffers.insert(buffer_id, buffer);
4992                }
4993                proto::create_buffer_for_peer::Variant::Chunk(chunk) => {
4994                    let buffer = this
4995                        .incomplete_buffers
4996                        .get(&chunk.buffer_id)
4997                        .ok_or_else(|| {
4998                            anyhow!(
4999                                "received chunk for buffer {} without initial state",
5000                                chunk.buffer_id
5001                            )
5002                        })?
5003                        .clone();
5004                    let operations = chunk
5005                        .operations
5006                        .into_iter()
5007                        .map(language::proto::deserialize_operation)
5008                        .collect::<Result<Vec<_>>>()?;
5009                    buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx))?;
5010
5011                    if chunk.is_last {
5012                        this.incomplete_buffers.remove(&chunk.buffer_id);
5013                        this.register_buffer(&buffer, cx)?;
5014                    }
5015                }
5016            }
5017
5018            Ok(())
5019        })
5020    }
5021
5022    async fn handle_update_diff_base(
5023        this: ModelHandle<Self>,
5024        envelope: TypedEnvelope<proto::UpdateDiffBase>,
5025        _: Arc<Client>,
5026        mut cx: AsyncAppContext,
5027    ) -> Result<()> {
5028        this.update(&mut cx, |this, cx| {
5029            let buffer_id = envelope.payload.buffer_id;
5030            let diff_base = envelope.payload.diff_base;
5031            let buffer = this
5032                .opened_buffers
5033                .get_mut(&buffer_id)
5034                .and_then(|b| b.upgrade(cx))
5035                .ok_or_else(|| anyhow!("No such buffer {}", buffer_id))?;
5036
5037            buffer.update(cx, |buffer, cx| buffer.set_diff_base(diff_base, cx));
5038
5039            Ok(())
5040        })
5041    }
5042
5043    async fn handle_update_buffer_file(
5044        this: ModelHandle<Self>,
5045        envelope: TypedEnvelope<proto::UpdateBufferFile>,
5046        _: Arc<Client>,
5047        mut cx: AsyncAppContext,
5048    ) -> Result<()> {
5049        this.update(&mut cx, |this, cx| {
5050            let payload = envelope.payload.clone();
5051            let buffer_id = payload.buffer_id;
5052            let file = payload.file.ok_or_else(|| anyhow!("invalid file"))?;
5053            let worktree = this
5054                .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
5055                .ok_or_else(|| anyhow!("no such worktree"))?;
5056            let file = File::from_proto(file, worktree, cx)?;
5057            let buffer = this
5058                .opened_buffers
5059                .get_mut(&buffer_id)
5060                .and_then(|b| b.upgrade(cx))
5061                .ok_or_else(|| anyhow!("no such buffer"))?;
5062            buffer.update(cx, |buffer, cx| {
5063                buffer.file_updated(Arc::new(file), cx).detach();
5064            });
5065            this.assign_language_to_buffer(&buffer, cx);
5066            Ok(())
5067        })
5068    }
5069
5070    async fn handle_save_buffer(
5071        this: ModelHandle<Self>,
5072        envelope: TypedEnvelope<proto::SaveBuffer>,
5073        _: Arc<Client>,
5074        mut cx: AsyncAppContext,
5075    ) -> Result<proto::BufferSaved> {
5076        let buffer_id = envelope.payload.buffer_id;
5077        let requested_version = deserialize_version(envelope.payload.version);
5078
5079        let (project_id, buffer) = this.update(&mut cx, |this, cx| {
5080            let project_id = this.remote_id().ok_or_else(|| anyhow!("not connected"))?;
5081            let buffer = this
5082                .opened_buffers
5083                .get(&buffer_id)
5084                .and_then(|buffer| buffer.upgrade(cx))
5085                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?;
5086            Ok::<_, anyhow::Error>((project_id, buffer))
5087        })?;
5088        buffer
5089            .update(&mut cx, |buffer, _| {
5090                buffer.wait_for_version(requested_version)
5091            })
5092            .await;
5093
5094        let (saved_version, fingerprint, mtime) =
5095            buffer.update(&mut cx, |buffer, cx| buffer.save(cx)).await?;
5096        Ok(proto::BufferSaved {
5097            project_id,
5098            buffer_id,
5099            version: serialize_version(&saved_version),
5100            mtime: Some(mtime.into()),
5101            fingerprint,
5102        })
5103    }
5104
5105    async fn handle_reload_buffers(
5106        this: ModelHandle<Self>,
5107        envelope: TypedEnvelope<proto::ReloadBuffers>,
5108        _: Arc<Client>,
5109        mut cx: AsyncAppContext,
5110    ) -> Result<proto::ReloadBuffersResponse> {
5111        let sender_id = envelope.original_sender_id()?;
5112        let reload = this.update(&mut cx, |this, cx| {
5113            let mut buffers = HashSet::default();
5114            for buffer_id in &envelope.payload.buffer_ids {
5115                buffers.insert(
5116                    this.opened_buffers
5117                        .get(buffer_id)
5118                        .and_then(|buffer| buffer.upgrade(cx))
5119                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
5120                );
5121            }
5122            Ok::<_, anyhow::Error>(this.reload_buffers(buffers, false, cx))
5123        })?;
5124
5125        let project_transaction = reload.await?;
5126        let project_transaction = this.update(&mut cx, |this, cx| {
5127            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5128        });
5129        Ok(proto::ReloadBuffersResponse {
5130            transaction: Some(project_transaction),
5131        })
5132    }
5133
5134    async fn handle_format_buffers(
5135        this: ModelHandle<Self>,
5136        envelope: TypedEnvelope<proto::FormatBuffers>,
5137        _: Arc<Client>,
5138        mut cx: AsyncAppContext,
5139    ) -> Result<proto::FormatBuffersResponse> {
5140        let sender_id = envelope.original_sender_id()?;
5141        let format = this.update(&mut cx, |this, cx| {
5142            let mut buffers = HashSet::default();
5143            for buffer_id in &envelope.payload.buffer_ids {
5144                buffers.insert(
5145                    this.opened_buffers
5146                        .get(buffer_id)
5147                        .and_then(|buffer| buffer.upgrade(cx))
5148                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
5149                );
5150            }
5151            let trigger = FormatTrigger::from_proto(envelope.payload.trigger);
5152            Ok::<_, anyhow::Error>(this.format(buffers, false, trigger, cx))
5153        })?;
5154
5155        let project_transaction = format.await?;
5156        let project_transaction = this.update(&mut cx, |this, cx| {
5157            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5158        });
5159        Ok(proto::FormatBuffersResponse {
5160            transaction: Some(project_transaction),
5161        })
5162    }
5163
5164    async fn handle_get_completions(
5165        this: ModelHandle<Self>,
5166        envelope: TypedEnvelope<proto::GetCompletions>,
5167        _: Arc<Client>,
5168        mut cx: AsyncAppContext,
5169    ) -> Result<proto::GetCompletionsResponse> {
5170        let buffer = this.read_with(&cx, |this, cx| {
5171            this.opened_buffers
5172                .get(&envelope.payload.buffer_id)
5173                .and_then(|buffer| buffer.upgrade(cx))
5174                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))
5175        })?;
5176
5177        let position = envelope
5178            .payload
5179            .position
5180            .and_then(language::proto::deserialize_anchor)
5181            .map(|p| {
5182                buffer.read_with(&cx, |buffer, _| {
5183                    buffer.clip_point_utf16(Unclipped(p.to_point_utf16(buffer)), Bias::Left)
5184                })
5185            })
5186            .ok_or_else(|| anyhow!("invalid position"))?;
5187
5188        let version = deserialize_version(envelope.payload.version);
5189        buffer
5190            .update(&mut cx, |buffer, _| buffer.wait_for_version(version))
5191            .await;
5192        let version = buffer.read_with(&cx, |buffer, _| buffer.version());
5193
5194        let completions = this
5195            .update(&mut cx, |this, cx| this.completions(&buffer, position, cx))
5196            .await?;
5197
5198        Ok(proto::GetCompletionsResponse {
5199            completions: completions
5200                .iter()
5201                .map(language::proto::serialize_completion)
5202                .collect(),
5203            version: serialize_version(&version),
5204        })
5205    }
5206
5207    async fn handle_apply_additional_edits_for_completion(
5208        this: ModelHandle<Self>,
5209        envelope: TypedEnvelope<proto::ApplyCompletionAdditionalEdits>,
5210        _: Arc<Client>,
5211        mut cx: AsyncAppContext,
5212    ) -> Result<proto::ApplyCompletionAdditionalEditsResponse> {
5213        let (buffer, completion) = this.update(&mut cx, |this, cx| {
5214            let buffer = this
5215                .opened_buffers
5216                .get(&envelope.payload.buffer_id)
5217                .and_then(|buffer| buffer.upgrade(cx))
5218                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
5219            let language = buffer.read(cx).language();
5220            let completion = language::proto::deserialize_completion(
5221                envelope
5222                    .payload
5223                    .completion
5224                    .ok_or_else(|| anyhow!("invalid completion"))?,
5225                language.cloned(),
5226            );
5227            Ok::<_, anyhow::Error>((buffer, completion))
5228        })?;
5229
5230        let completion = completion.await?;
5231
5232        let apply_additional_edits = this.update(&mut cx, |this, cx| {
5233            this.apply_additional_edits_for_completion(buffer, completion, false, cx)
5234        });
5235
5236        Ok(proto::ApplyCompletionAdditionalEditsResponse {
5237            transaction: apply_additional_edits
5238                .await?
5239                .as_ref()
5240                .map(language::proto::serialize_transaction),
5241        })
5242    }
5243
5244    async fn handle_get_code_actions(
5245        this: ModelHandle<Self>,
5246        envelope: TypedEnvelope<proto::GetCodeActions>,
5247        _: Arc<Client>,
5248        mut cx: AsyncAppContext,
5249    ) -> Result<proto::GetCodeActionsResponse> {
5250        let start = envelope
5251            .payload
5252            .start
5253            .and_then(language::proto::deserialize_anchor)
5254            .ok_or_else(|| anyhow!("invalid start"))?;
5255        let end = envelope
5256            .payload
5257            .end
5258            .and_then(language::proto::deserialize_anchor)
5259            .ok_or_else(|| anyhow!("invalid end"))?;
5260        let buffer = this.update(&mut cx, |this, cx| {
5261            this.opened_buffers
5262                .get(&envelope.payload.buffer_id)
5263                .and_then(|buffer| buffer.upgrade(cx))
5264                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))
5265        })?;
5266        buffer
5267            .update(&mut cx, |buffer, _| {
5268                buffer.wait_for_version(deserialize_version(envelope.payload.version))
5269            })
5270            .await;
5271
5272        let version = buffer.read_with(&cx, |buffer, _| buffer.version());
5273        let code_actions = this.update(&mut cx, |this, cx| {
5274            Ok::<_, anyhow::Error>(this.code_actions(&buffer, start..end, cx))
5275        })?;
5276
5277        Ok(proto::GetCodeActionsResponse {
5278            actions: code_actions
5279                .await?
5280                .iter()
5281                .map(language::proto::serialize_code_action)
5282                .collect(),
5283            version: serialize_version(&version),
5284        })
5285    }
5286
5287    async fn handle_apply_code_action(
5288        this: ModelHandle<Self>,
5289        envelope: TypedEnvelope<proto::ApplyCodeAction>,
5290        _: Arc<Client>,
5291        mut cx: AsyncAppContext,
5292    ) -> Result<proto::ApplyCodeActionResponse> {
5293        let sender_id = envelope.original_sender_id()?;
5294        let action = language::proto::deserialize_code_action(
5295            envelope
5296                .payload
5297                .action
5298                .ok_or_else(|| anyhow!("invalid action"))?,
5299        )?;
5300        let apply_code_action = this.update(&mut cx, |this, cx| {
5301            let buffer = this
5302                .opened_buffers
5303                .get(&envelope.payload.buffer_id)
5304                .and_then(|buffer| buffer.upgrade(cx))
5305                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
5306            Ok::<_, anyhow::Error>(this.apply_code_action(buffer, action, false, cx))
5307        })?;
5308
5309        let project_transaction = apply_code_action.await?;
5310        let project_transaction = this.update(&mut cx, |this, cx| {
5311            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5312        });
5313        Ok(proto::ApplyCodeActionResponse {
5314            transaction: Some(project_transaction),
5315        })
5316    }
5317
5318    async fn handle_lsp_command<T: LspCommand>(
5319        this: ModelHandle<Self>,
5320        envelope: TypedEnvelope<T::ProtoRequest>,
5321        _: Arc<Client>,
5322        mut cx: AsyncAppContext,
5323    ) -> Result<<T::ProtoRequest as proto::RequestMessage>::Response>
5324    where
5325        <T::LspRequest as lsp::request::Request>::Result: Send,
5326    {
5327        let sender_id = envelope.original_sender_id()?;
5328        let buffer_id = T::buffer_id_from_proto(&envelope.payload);
5329        let buffer_handle = this.read_with(&cx, |this, _| {
5330            this.opened_buffers
5331                .get(&buffer_id)
5332                .and_then(|buffer| buffer.upgrade(&cx))
5333                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))
5334        })?;
5335        let request = T::from_proto(
5336            envelope.payload,
5337            this.clone(),
5338            buffer_handle.clone(),
5339            cx.clone(),
5340        )
5341        .await?;
5342        let buffer_version = buffer_handle.read_with(&cx, |buffer, _| buffer.version());
5343        let response = this
5344            .update(&mut cx, |this, cx| {
5345                this.request_lsp(buffer_handle, request, cx)
5346            })
5347            .await?;
5348        this.update(&mut cx, |this, cx| {
5349            Ok(T::response_to_proto(
5350                response,
5351                this,
5352                sender_id,
5353                &buffer_version,
5354                cx,
5355            ))
5356        })
5357    }
5358
5359    async fn handle_get_project_symbols(
5360        this: ModelHandle<Self>,
5361        envelope: TypedEnvelope<proto::GetProjectSymbols>,
5362        _: Arc<Client>,
5363        mut cx: AsyncAppContext,
5364    ) -> Result<proto::GetProjectSymbolsResponse> {
5365        let symbols = this
5366            .update(&mut cx, |this, cx| {
5367                this.symbols(&envelope.payload.query, cx)
5368            })
5369            .await?;
5370
5371        Ok(proto::GetProjectSymbolsResponse {
5372            symbols: symbols.iter().map(serialize_symbol).collect(),
5373        })
5374    }
5375
5376    async fn handle_search_project(
5377        this: ModelHandle<Self>,
5378        envelope: TypedEnvelope<proto::SearchProject>,
5379        _: Arc<Client>,
5380        mut cx: AsyncAppContext,
5381    ) -> Result<proto::SearchProjectResponse> {
5382        let peer_id = envelope.original_sender_id()?;
5383        let query = SearchQuery::from_proto(envelope.payload)?;
5384        let result = this
5385            .update(&mut cx, |this, cx| this.search(query, cx))
5386            .await?;
5387
5388        this.update(&mut cx, |this, cx| {
5389            let mut locations = Vec::new();
5390            for (buffer, ranges) in result {
5391                for range in ranges {
5392                    let start = serialize_anchor(&range.start);
5393                    let end = serialize_anchor(&range.end);
5394                    let buffer_id = this.create_buffer_for_peer(&buffer, peer_id, cx);
5395                    locations.push(proto::Location {
5396                        buffer_id,
5397                        start: Some(start),
5398                        end: Some(end),
5399                    });
5400                }
5401            }
5402            Ok(proto::SearchProjectResponse { locations })
5403        })
5404    }
5405
5406    async fn handle_open_buffer_for_symbol(
5407        this: ModelHandle<Self>,
5408        envelope: TypedEnvelope<proto::OpenBufferForSymbol>,
5409        _: Arc<Client>,
5410        mut cx: AsyncAppContext,
5411    ) -> Result<proto::OpenBufferForSymbolResponse> {
5412        let peer_id = envelope.original_sender_id()?;
5413        let symbol = envelope
5414            .payload
5415            .symbol
5416            .ok_or_else(|| anyhow!("invalid symbol"))?;
5417        let symbol = this
5418            .read_with(&cx, |this, _| this.deserialize_symbol(symbol))
5419            .await?;
5420        let symbol = this.read_with(&cx, |this, _| {
5421            let signature = this.symbol_signature(&symbol.path);
5422            if signature == symbol.signature {
5423                Ok(symbol)
5424            } else {
5425                Err(anyhow!("invalid symbol signature"))
5426            }
5427        })?;
5428        let buffer = this
5429            .update(&mut cx, |this, cx| this.open_buffer_for_symbol(&symbol, cx))
5430            .await?;
5431
5432        Ok(proto::OpenBufferForSymbolResponse {
5433            buffer_id: this.update(&mut cx, |this, cx| {
5434                this.create_buffer_for_peer(&buffer, peer_id, cx)
5435            }),
5436        })
5437    }
5438
5439    fn symbol_signature(&self, project_path: &ProjectPath) -> [u8; 32] {
5440        let mut hasher = Sha256::new();
5441        hasher.update(project_path.worktree_id.to_proto().to_be_bytes());
5442        hasher.update(project_path.path.to_string_lossy().as_bytes());
5443        hasher.update(self.nonce.to_be_bytes());
5444        hasher.finalize().as_slice().try_into().unwrap()
5445    }
5446
5447    async fn handle_open_buffer_by_id(
5448        this: ModelHandle<Self>,
5449        envelope: TypedEnvelope<proto::OpenBufferById>,
5450        _: Arc<Client>,
5451        mut cx: AsyncAppContext,
5452    ) -> Result<proto::OpenBufferResponse> {
5453        let peer_id = envelope.original_sender_id()?;
5454        let buffer = this
5455            .update(&mut cx, |this, cx| {
5456                this.open_buffer_by_id(envelope.payload.id, cx)
5457            })
5458            .await?;
5459        this.update(&mut cx, |this, cx| {
5460            Ok(proto::OpenBufferResponse {
5461                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
5462            })
5463        })
5464    }
5465
5466    async fn handle_open_buffer_by_path(
5467        this: ModelHandle<Self>,
5468        envelope: TypedEnvelope<proto::OpenBufferByPath>,
5469        _: Arc<Client>,
5470        mut cx: AsyncAppContext,
5471    ) -> Result<proto::OpenBufferResponse> {
5472        let peer_id = envelope.original_sender_id()?;
5473        let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
5474        let open_buffer = this.update(&mut cx, |this, cx| {
5475            this.open_buffer(
5476                ProjectPath {
5477                    worktree_id,
5478                    path: PathBuf::from(envelope.payload.path).into(),
5479                },
5480                cx,
5481            )
5482        });
5483
5484        let buffer = open_buffer.await?;
5485        this.update(&mut cx, |this, cx| {
5486            Ok(proto::OpenBufferResponse {
5487                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
5488            })
5489        })
5490    }
5491
5492    fn serialize_project_transaction_for_peer(
5493        &mut self,
5494        project_transaction: ProjectTransaction,
5495        peer_id: proto::PeerId,
5496        cx: &AppContext,
5497    ) -> proto::ProjectTransaction {
5498        let mut serialized_transaction = proto::ProjectTransaction {
5499            buffer_ids: Default::default(),
5500            transactions: Default::default(),
5501        };
5502        for (buffer, transaction) in project_transaction.0 {
5503            serialized_transaction
5504                .buffer_ids
5505                .push(self.create_buffer_for_peer(&buffer, peer_id, cx));
5506            serialized_transaction
5507                .transactions
5508                .push(language::proto::serialize_transaction(&transaction));
5509        }
5510        serialized_transaction
5511    }
5512
5513    fn deserialize_project_transaction(
5514        &mut self,
5515        message: proto::ProjectTransaction,
5516        push_to_history: bool,
5517        cx: &mut ModelContext<Self>,
5518    ) -> Task<Result<ProjectTransaction>> {
5519        cx.spawn(|this, mut cx| async move {
5520            let mut project_transaction = ProjectTransaction::default();
5521            for (buffer_id, transaction) in message.buffer_ids.into_iter().zip(message.transactions)
5522            {
5523                let buffer = this
5524                    .update(&mut cx, |this, cx| this.wait_for_buffer(buffer_id, cx))
5525                    .await?;
5526                let transaction = language::proto::deserialize_transaction(transaction)?;
5527                project_transaction.0.insert(buffer, transaction);
5528            }
5529
5530            for (buffer, transaction) in &project_transaction.0 {
5531                buffer
5532                    .update(&mut cx, |buffer, _| {
5533                        buffer.wait_for_edits(transaction.edit_ids.iter().copied())
5534                    })
5535                    .await;
5536
5537                if push_to_history {
5538                    buffer.update(&mut cx, |buffer, _| {
5539                        buffer.push_transaction(transaction.clone(), Instant::now());
5540                    });
5541                }
5542            }
5543
5544            Ok(project_transaction)
5545        })
5546    }
5547
5548    fn create_buffer_for_peer(
5549        &mut self,
5550        buffer: &ModelHandle<Buffer>,
5551        peer_id: proto::PeerId,
5552        cx: &AppContext,
5553    ) -> u64 {
5554        let buffer_id = buffer.read(cx).remote_id();
5555        if let Some(project_id) = self.remote_id() {
5556            let shared_buffers = self.shared_buffers.entry(peer_id).or_default();
5557            if shared_buffers.insert(buffer_id) {
5558                let buffer = buffer.read(cx);
5559                let state = buffer.to_proto();
5560                let operations = buffer.serialize_ops(cx);
5561                let client = self.client.clone();
5562                cx.background()
5563                    .spawn(
5564                        async move {
5565                            let mut operations = operations.await;
5566
5567                            client.send(proto::CreateBufferForPeer {
5568                                project_id,
5569                                peer_id: Some(peer_id),
5570                                variant: Some(proto::create_buffer_for_peer::Variant::State(state)),
5571                            })?;
5572
5573                            loop {
5574                                #[cfg(any(test, feature = "test-support"))]
5575                                const CHUNK_SIZE: usize = 5;
5576
5577                                #[cfg(not(any(test, feature = "test-support")))]
5578                                const CHUNK_SIZE: usize = 100;
5579
5580                                let chunk = operations
5581                                    .drain(..cmp::min(CHUNK_SIZE, operations.len()))
5582                                    .collect();
5583                                let is_last = operations.is_empty();
5584                                client.send(proto::CreateBufferForPeer {
5585                                    project_id,
5586                                    peer_id: Some(peer_id),
5587                                    variant: Some(proto::create_buffer_for_peer::Variant::Chunk(
5588                                        proto::BufferChunk {
5589                                            buffer_id,
5590                                            operations: chunk,
5591                                            is_last,
5592                                        },
5593                                    )),
5594                                })?;
5595
5596                                if is_last {
5597                                    break;
5598                                }
5599                            }
5600
5601                            Ok(())
5602                        }
5603                        .log_err(),
5604                    )
5605                    .detach();
5606            }
5607        }
5608
5609        buffer_id
5610    }
5611
5612    fn wait_for_buffer(
5613        &self,
5614        id: u64,
5615        cx: &mut ModelContext<Self>,
5616    ) -> Task<Result<ModelHandle<Buffer>>> {
5617        let mut opened_buffer_rx = self.opened_buffer.1.clone();
5618        cx.spawn(|this, mut cx| async move {
5619            let buffer = loop {
5620                let buffer = this.read_with(&cx, |this, cx| {
5621                    this.opened_buffers
5622                        .get(&id)
5623                        .and_then(|buffer| buffer.upgrade(cx))
5624                });
5625                if let Some(buffer) = buffer {
5626                    break buffer;
5627                } else if this.read_with(&cx, |this, _| this.is_read_only()) {
5628                    return Err(anyhow!("disconnected before buffer {} could be opened", id));
5629                }
5630
5631                opened_buffer_rx
5632                    .next()
5633                    .await
5634                    .ok_or_else(|| anyhow!("project dropped while waiting for buffer"))?;
5635            };
5636            buffer.update(&mut cx, |buffer, cx| buffer.git_diff_recalc(cx));
5637            Ok(buffer)
5638        })
5639    }
5640
5641    fn set_collaborators_from_proto(
5642        &mut self,
5643        messages: Vec<proto::Collaborator>,
5644        cx: &mut ModelContext<Self>,
5645    ) -> Result<()> {
5646        let mut collaborators = HashMap::default();
5647        for message in messages {
5648            let collaborator = Collaborator::from_proto(message)?;
5649            collaborators.insert(collaborator.peer_id, collaborator);
5650        }
5651        for old_peer_id in self.collaborators.keys() {
5652            if !collaborators.contains_key(old_peer_id) {
5653                cx.emit(Event::CollaboratorLeft(*old_peer_id));
5654            }
5655        }
5656        self.collaborators = collaborators;
5657        Ok(())
5658    }
5659
5660    fn deserialize_symbol(
5661        &self,
5662        serialized_symbol: proto::Symbol,
5663    ) -> impl Future<Output = Result<Symbol>> {
5664        let languages = self.languages.clone();
5665        async move {
5666            let source_worktree_id = WorktreeId::from_proto(serialized_symbol.source_worktree_id);
5667            let worktree_id = WorktreeId::from_proto(serialized_symbol.worktree_id);
5668            let start = serialized_symbol
5669                .start
5670                .ok_or_else(|| anyhow!("invalid start"))?;
5671            let end = serialized_symbol
5672                .end
5673                .ok_or_else(|| anyhow!("invalid end"))?;
5674            let kind = unsafe { mem::transmute(serialized_symbol.kind) };
5675            let path = ProjectPath {
5676                worktree_id,
5677                path: PathBuf::from(serialized_symbol.path).into(),
5678            };
5679            let language = languages.select_language(&path.path);
5680            Ok(Symbol {
5681                language_server_name: LanguageServerName(
5682                    serialized_symbol.language_server_name.into(),
5683                ),
5684                source_worktree_id,
5685                path,
5686                label: {
5687                    match language {
5688                        Some(language) => {
5689                            language
5690                                .label_for_symbol(&serialized_symbol.name, kind)
5691                                .await
5692                        }
5693                        None => None,
5694                    }
5695                    .unwrap_or_else(|| CodeLabel::plain(serialized_symbol.name.clone(), None))
5696                },
5697
5698                name: serialized_symbol.name,
5699                range: Unclipped(PointUtf16::new(start.row, start.column))
5700                    ..Unclipped(PointUtf16::new(end.row, end.column)),
5701                kind,
5702                signature: serialized_symbol
5703                    .signature
5704                    .try_into()
5705                    .map_err(|_| anyhow!("invalid signature"))?,
5706            })
5707        }
5708    }
5709
5710    async fn handle_buffer_saved(
5711        this: ModelHandle<Self>,
5712        envelope: TypedEnvelope<proto::BufferSaved>,
5713        _: Arc<Client>,
5714        mut cx: AsyncAppContext,
5715    ) -> Result<()> {
5716        let version = deserialize_version(envelope.payload.version);
5717        let mtime = envelope
5718            .payload
5719            .mtime
5720            .ok_or_else(|| anyhow!("missing mtime"))?
5721            .into();
5722
5723        this.update(&mut cx, |this, cx| {
5724            let buffer = this
5725                .opened_buffers
5726                .get(&envelope.payload.buffer_id)
5727                .and_then(|buffer| buffer.upgrade(cx));
5728            if let Some(buffer) = buffer {
5729                buffer.update(cx, |buffer, cx| {
5730                    buffer.did_save(version, envelope.payload.fingerprint, mtime, None, cx);
5731                });
5732            }
5733            Ok(())
5734        })
5735    }
5736
5737    async fn handle_buffer_reloaded(
5738        this: ModelHandle<Self>,
5739        envelope: TypedEnvelope<proto::BufferReloaded>,
5740        _: Arc<Client>,
5741        mut cx: AsyncAppContext,
5742    ) -> Result<()> {
5743        let payload = envelope.payload;
5744        let version = deserialize_version(payload.version);
5745        let line_ending = deserialize_line_ending(
5746            proto::LineEnding::from_i32(payload.line_ending)
5747                .ok_or_else(|| anyhow!("missing line ending"))?,
5748        );
5749        let mtime = payload
5750            .mtime
5751            .ok_or_else(|| anyhow!("missing mtime"))?
5752            .into();
5753        this.update(&mut cx, |this, cx| {
5754            let buffer = this
5755                .opened_buffers
5756                .get(&payload.buffer_id)
5757                .and_then(|buffer| buffer.upgrade(cx));
5758            if let Some(buffer) = buffer {
5759                buffer.update(cx, |buffer, cx| {
5760                    buffer.did_reload(version, payload.fingerprint, line_ending, mtime, cx);
5761                });
5762            }
5763            Ok(())
5764        })
5765    }
5766
5767    #[allow(clippy::type_complexity)]
5768    fn edits_from_lsp(
5769        &mut self,
5770        buffer: &ModelHandle<Buffer>,
5771        lsp_edits: impl 'static + Send + IntoIterator<Item = lsp::TextEdit>,
5772        version: Option<i32>,
5773        cx: &mut ModelContext<Self>,
5774    ) -> Task<Result<Vec<(Range<Anchor>, String)>>> {
5775        let snapshot = self.buffer_snapshot_for_lsp_version(buffer, version, cx);
5776        cx.background().spawn(async move {
5777            let snapshot = snapshot?;
5778            let mut lsp_edits = lsp_edits
5779                .into_iter()
5780                .map(|edit| (range_from_lsp(edit.range), edit.new_text))
5781                .collect::<Vec<_>>();
5782            lsp_edits.sort_by_key(|(range, _)| range.start);
5783
5784            let mut lsp_edits = lsp_edits.into_iter().peekable();
5785            let mut edits = Vec::new();
5786            while let Some((range, mut new_text)) = lsp_edits.next() {
5787                // Clip invalid ranges provided by the language server.
5788                let mut range = snapshot.clip_point_utf16(range.start, Bias::Left)
5789                    ..snapshot.clip_point_utf16(range.end, Bias::Left);
5790
5791                // Combine any LSP edits that are adjacent.
5792                //
5793                // Also, combine LSP edits that are separated from each other by only
5794                // a newline. This is important because for some code actions,
5795                // Rust-analyzer rewrites the entire buffer via a series of edits that
5796                // are separated by unchanged newline characters.
5797                //
5798                // In order for the diffing logic below to work properly, any edits that
5799                // cancel each other out must be combined into one.
5800                while let Some((next_range, next_text)) = lsp_edits.peek() {
5801                    if next_range.start.0 > range.end {
5802                        if next_range.start.0.row > range.end.row + 1
5803                            || next_range.start.0.column > 0
5804                            || snapshot.clip_point_utf16(
5805                                Unclipped(PointUtf16::new(range.end.row, u32::MAX)),
5806                                Bias::Left,
5807                            ) > range.end
5808                        {
5809                            break;
5810                        }
5811                        new_text.push('\n');
5812                    }
5813                    range.end = snapshot.clip_point_utf16(next_range.end, Bias::Left);
5814                    new_text.push_str(next_text);
5815                    lsp_edits.next();
5816                }
5817
5818                // For multiline edits, perform a diff of the old and new text so that
5819                // we can identify the changes more precisely, preserving the locations
5820                // of any anchors positioned in the unchanged regions.
5821                if range.end.row > range.start.row {
5822                    let mut offset = range.start.to_offset(&snapshot);
5823                    let old_text = snapshot.text_for_range(range).collect::<String>();
5824
5825                    let diff = TextDiff::from_lines(old_text.as_str(), &new_text);
5826                    let mut moved_since_edit = true;
5827                    for change in diff.iter_all_changes() {
5828                        let tag = change.tag();
5829                        let value = change.value();
5830                        match tag {
5831                            ChangeTag::Equal => {
5832                                offset += value.len();
5833                                moved_since_edit = true;
5834                            }
5835                            ChangeTag::Delete => {
5836                                let start = snapshot.anchor_after(offset);
5837                                let end = snapshot.anchor_before(offset + value.len());
5838                                if moved_since_edit {
5839                                    edits.push((start..end, String::new()));
5840                                } else {
5841                                    edits.last_mut().unwrap().0.end = end;
5842                                }
5843                                offset += value.len();
5844                                moved_since_edit = false;
5845                            }
5846                            ChangeTag::Insert => {
5847                                if moved_since_edit {
5848                                    let anchor = snapshot.anchor_after(offset);
5849                                    edits.push((anchor..anchor, value.to_string()));
5850                                } else {
5851                                    edits.last_mut().unwrap().1.push_str(value);
5852                                }
5853                                moved_since_edit = false;
5854                            }
5855                        }
5856                    }
5857                } else if range.end == range.start {
5858                    let anchor = snapshot.anchor_after(range.start);
5859                    edits.push((anchor..anchor, new_text));
5860                } else {
5861                    let edit_start = snapshot.anchor_after(range.start);
5862                    let edit_end = snapshot.anchor_before(range.end);
5863                    edits.push((edit_start..edit_end, new_text));
5864                }
5865            }
5866
5867            Ok(edits)
5868        })
5869    }
5870
5871    fn buffer_snapshot_for_lsp_version(
5872        &mut self,
5873        buffer: &ModelHandle<Buffer>,
5874        version: Option<i32>,
5875        cx: &AppContext,
5876    ) -> Result<TextBufferSnapshot> {
5877        const OLD_VERSIONS_TO_RETAIN: i32 = 10;
5878
5879        if let Some(version) = version {
5880            let buffer_id = buffer.read(cx).remote_id();
5881            let snapshots = self
5882                .buffer_snapshots
5883                .get_mut(&buffer_id)
5884                .ok_or_else(|| anyhow!("no snapshot found for buffer {}", buffer_id))?;
5885            let mut found_snapshot = None;
5886            snapshots.retain(|(snapshot_version, snapshot)| {
5887                if snapshot_version + OLD_VERSIONS_TO_RETAIN < version {
5888                    false
5889                } else {
5890                    if *snapshot_version == version {
5891                        found_snapshot = Some(snapshot.clone());
5892                    }
5893                    true
5894                }
5895            });
5896
5897            found_snapshot.ok_or_else(|| {
5898                anyhow!(
5899                    "snapshot not found for buffer {} at version {}",
5900                    buffer_id,
5901                    version
5902                )
5903            })
5904        } else {
5905            Ok((buffer.read(cx)).text_snapshot())
5906        }
5907    }
5908
5909    fn language_server_for_buffer(
5910        &self,
5911        buffer: &Buffer,
5912        cx: &AppContext,
5913    ) -> Option<(&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
5914        if let Some((file, language)) = File::from_dyn(buffer.file()).zip(buffer.language()) {
5915            let name = language.lsp_adapter()?.name.clone();
5916            let worktree_id = file.worktree_id(cx);
5917            let key = (worktree_id, name);
5918
5919            if let Some(server_id) = self.language_server_ids.get(&key) {
5920                if let Some(LanguageServerState::Running {
5921                    adapter, server, ..
5922                }) = self.language_servers.get(server_id)
5923                {
5924                    return Some((adapter, server));
5925                }
5926            }
5927        }
5928
5929        None
5930    }
5931}
5932
5933impl WorktreeHandle {
5934    pub fn upgrade(&self, cx: &AppContext) -> Option<ModelHandle<Worktree>> {
5935        match self {
5936            WorktreeHandle::Strong(handle) => Some(handle.clone()),
5937            WorktreeHandle::Weak(handle) => handle.upgrade(cx),
5938        }
5939    }
5940}
5941
5942impl OpenBuffer {
5943    pub fn upgrade(&self, cx: &impl UpgradeModelHandle) -> Option<ModelHandle<Buffer>> {
5944        match self {
5945            OpenBuffer::Strong(handle) => Some(handle.clone()),
5946            OpenBuffer::Weak(handle) => handle.upgrade(cx),
5947            OpenBuffer::Operations(_) => None,
5948        }
5949    }
5950}
5951
5952pub struct PathMatchCandidateSet {
5953    pub snapshot: Snapshot,
5954    pub include_ignored: bool,
5955    pub include_root_name: bool,
5956}
5957
5958impl<'a> fuzzy::PathMatchCandidateSet<'a> for PathMatchCandidateSet {
5959    type Candidates = PathMatchCandidateSetIter<'a>;
5960
5961    fn id(&self) -> usize {
5962        self.snapshot.id().to_usize()
5963    }
5964
5965    fn len(&self) -> usize {
5966        if self.include_ignored {
5967            self.snapshot.file_count()
5968        } else {
5969            self.snapshot.visible_file_count()
5970        }
5971    }
5972
5973    fn prefix(&self) -> Arc<str> {
5974        if self.snapshot.root_entry().map_or(false, |e| e.is_file()) {
5975            self.snapshot.root_name().into()
5976        } else if self.include_root_name {
5977            format!("{}/", self.snapshot.root_name()).into()
5978        } else {
5979            "".into()
5980        }
5981    }
5982
5983    fn candidates(&'a self, start: usize) -> Self::Candidates {
5984        PathMatchCandidateSetIter {
5985            traversal: self.snapshot.files(self.include_ignored, start),
5986        }
5987    }
5988}
5989
5990pub struct PathMatchCandidateSetIter<'a> {
5991    traversal: Traversal<'a>,
5992}
5993
5994impl<'a> Iterator for PathMatchCandidateSetIter<'a> {
5995    type Item = fuzzy::PathMatchCandidate<'a>;
5996
5997    fn next(&mut self) -> Option<Self::Item> {
5998        self.traversal.next().map(|entry| {
5999            if let EntryKind::File(char_bag) = entry.kind {
6000                fuzzy::PathMatchCandidate {
6001                    path: &entry.path,
6002                    char_bag,
6003                }
6004            } else {
6005                unreachable!()
6006            }
6007        })
6008    }
6009}
6010
6011impl Entity for Project {
6012    type Event = Event;
6013
6014    fn release(&mut self, _: &mut gpui::MutableAppContext) {
6015        match &self.client_state {
6016            Some(ProjectClientState::Local { remote_id, .. }) => {
6017                self.client
6018                    .send(proto::UnshareProject {
6019                        project_id: *remote_id,
6020                    })
6021                    .log_err();
6022            }
6023            Some(ProjectClientState::Remote { remote_id, .. }) => {
6024                self.client
6025                    .send(proto::LeaveProject {
6026                        project_id: *remote_id,
6027                    })
6028                    .log_err();
6029            }
6030            _ => {}
6031        }
6032    }
6033
6034    fn app_will_quit(
6035        &mut self,
6036        _: &mut MutableAppContext,
6037    ) -> Option<std::pin::Pin<Box<dyn 'static + Future<Output = ()>>>> {
6038        let shutdown_futures = self
6039            .language_servers
6040            .drain()
6041            .map(|(_, server_state)| async {
6042                match server_state {
6043                    LanguageServerState::Running { server, .. } => server.shutdown()?.await,
6044                    LanguageServerState::Starting(starting_server) => {
6045                        starting_server.await?.shutdown()?.await
6046                    }
6047                }
6048            })
6049            .collect::<Vec<_>>();
6050
6051        Some(
6052            async move {
6053                futures::future::join_all(shutdown_futures).await;
6054            }
6055            .boxed(),
6056        )
6057    }
6058}
6059
6060impl Collaborator {
6061    fn from_proto(message: proto::Collaborator) -> Result<Self> {
6062        Ok(Self {
6063            peer_id: message.peer_id.ok_or_else(|| anyhow!("invalid peer id"))?,
6064            replica_id: message.replica_id as ReplicaId,
6065        })
6066    }
6067}
6068
6069impl<P: AsRef<Path>> From<(WorktreeId, P)> for ProjectPath {
6070    fn from((worktree_id, path): (WorktreeId, P)) -> Self {
6071        Self {
6072            worktree_id,
6073            path: path.as_ref().into(),
6074        }
6075    }
6076}
6077
6078fn serialize_symbol(symbol: &Symbol) -> proto::Symbol {
6079    proto::Symbol {
6080        language_server_name: symbol.language_server_name.0.to_string(),
6081        source_worktree_id: symbol.source_worktree_id.to_proto(),
6082        worktree_id: symbol.path.worktree_id.to_proto(),
6083        path: symbol.path.path.to_string_lossy().to_string(),
6084        name: symbol.name.clone(),
6085        kind: unsafe { mem::transmute(symbol.kind) },
6086        start: Some(proto::PointUtf16 {
6087            row: symbol.range.start.0.row,
6088            column: symbol.range.start.0.column,
6089        }),
6090        end: Some(proto::PointUtf16 {
6091            row: symbol.range.end.0.row,
6092            column: symbol.range.end.0.column,
6093        }),
6094        signature: symbol.signature.to_vec(),
6095    }
6096}
6097
6098fn relativize_path(base: &Path, path: &Path) -> PathBuf {
6099    let mut path_components = path.components();
6100    let mut base_components = base.components();
6101    let mut components: Vec<Component> = Vec::new();
6102    loop {
6103        match (path_components.next(), base_components.next()) {
6104            (None, None) => break,
6105            (Some(a), None) => {
6106                components.push(a);
6107                components.extend(path_components.by_ref());
6108                break;
6109            }
6110            (None, _) => components.push(Component::ParentDir),
6111            (Some(a), Some(b)) if components.is_empty() && a == b => (),
6112            (Some(a), Some(b)) if b == Component::CurDir => components.push(a),
6113            (Some(a), Some(_)) => {
6114                components.push(Component::ParentDir);
6115                for _ in base_components {
6116                    components.push(Component::ParentDir);
6117                }
6118                components.push(a);
6119                components.extend(path_components.by_ref());
6120                break;
6121            }
6122        }
6123    }
6124    components.iter().map(|c| c.as_os_str()).collect()
6125}
6126
6127impl Item for Buffer {
6128    fn entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId> {
6129        File::from_dyn(self.file()).and_then(|file| file.project_entry_id(cx))
6130    }
6131}