1mod ignore;
   2mod lsp_command;
   3mod lsp_glob_set;
   4pub mod search;
   5pub mod terminals;
   6pub mod worktree;
   7
   8#[cfg(test)]
   9mod project_tests;
  10
  11use anyhow::{anyhow, Context, Result};
  12use client::{proto, Client, TypedEnvelope, UserStore};
  13use clock::ReplicaId;
  14use collections::{hash_map, BTreeMap, HashMap, HashSet};
  15use copilot::Copilot;
  16use futures::{
  17    channel::mpsc::{self, UnboundedReceiver},
  18    future::{try_join_all, Shared},
  19    AsyncWriteExt, Future, FutureExt, StreamExt, TryFutureExt,
  20};
  21use gpui::{
  22    AnyModelHandle, AppContext, AsyncAppContext, Entity, ModelContext, ModelHandle, Task,
  23    UpgradeModelHandle, WeakModelHandle,
  24};
  25use language::{
  26    point_to_lsp,
  27    proto::{
  28        deserialize_anchor, deserialize_fingerprint, deserialize_line_ending, deserialize_version,
  29        serialize_anchor, serialize_version,
  30    },
  31    range_from_lsp, range_to_lsp, Anchor, Bias, Buffer, CachedLspAdapter, CodeAction, CodeLabel,
  32    Completion, Diagnostic, DiagnosticEntry, DiagnosticSet, Diff, Event as BufferEvent, File as _,
  33    Language, LanguageRegistry, LanguageServerName, LocalFile, OffsetRangeExt, Operation, Patch,
  34    PendingLanguageServer, PointUtf16, RopeFingerprint, TextBufferSnapshot, ToOffset, ToPointUtf16,
  35    Transaction, Unclipped,
  36};
  37use lsp::{
  38    DiagnosticSeverity, DiagnosticTag, DidChangeWatchedFilesRegistrationOptions,
  39    DocumentHighlightKind, LanguageServer, LanguageServerId, LanguageString, MarkedString,
  40};
  41use lsp_command::*;
  42use lsp_glob_set::LspGlobSet;
  43use postage::watch;
  44use rand::prelude::*;
  45use search::SearchQuery;
  46use serde::Serialize;
  47use settings::{FormatOnSave, Formatter, Settings};
  48use sha2::{Digest, Sha256};
  49use similar::{ChangeTag, TextDiff};
  50use std::{
  51    cell::RefCell,
  52    cmp::{self, Ordering},
  53    convert::TryInto,
  54    hash::Hash,
  55    mem,
  56    num::NonZeroU32,
  57    ops::Range,
  58    path::{Component, Path, PathBuf},
  59    rc::Rc,
  60    str,
  61    sync::{
  62        atomic::{AtomicUsize, Ordering::SeqCst},
  63        Arc,
  64    },
  65    time::{Duration, Instant, SystemTime},
  66};
  67use terminals::Terminals;
  68
  69use util::{debug_panic, defer, merge_json_value_into, post_inc, ResultExt, TryFutureExt as _};
  70
  71pub use fs::*;
  72pub use worktree::*;
  73
  74pub trait Item {
  75    fn entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId>;
  76    fn project_path(&self, cx: &AppContext) -> Option<ProjectPath>;
  77}
  78
  79// Language server state is stored across 3 collections:
  80//     language_servers =>
  81//         a mapping from unique server id to LanguageServerState which can either be a task for a
  82//         server in the process of starting, or a running server with adapter and language server arcs
  83//     language_server_ids => a mapping from worktreeId and server name to the unique server id
  84//     language_server_statuses => a mapping from unique server id to the current server status
  85//
  86// Multiple worktrees can map to the same language server for example when you jump to the definition
  87// of a file in the standard library. So language_server_ids is used to look up which server is active
  88// for a given worktree and language server name
  89//
  90// When starting a language server, first the id map is checked to make sure a server isn't already available
  91// for that worktree. If there is one, it finishes early. Otherwise, a new id is allocated and and
  92// the Starting variant of LanguageServerState is stored in the language_servers map.
  93pub struct Project {
  94    worktrees: Vec<WorktreeHandle>,
  95    active_entry: Option<ProjectEntryId>,
  96    buffer_ordered_messages_tx: mpsc::UnboundedSender<BufferOrderedMessage>,
  97    languages: Arc<LanguageRegistry>,
  98    language_servers: HashMap<LanguageServerId, LanguageServerState>,
  99    language_server_ids: HashMap<(WorktreeId, LanguageServerName), LanguageServerId>,
 100    language_server_statuses: BTreeMap<LanguageServerId, LanguageServerStatus>,
 101    last_workspace_edits_by_language_server: HashMap<LanguageServerId, ProjectTransaction>,
 102    client: Arc<client::Client>,
 103    next_entry_id: Arc<AtomicUsize>,
 104    join_project_response_message_id: u32,
 105    next_diagnostic_group_id: usize,
 106    user_store: ModelHandle<UserStore>,
 107    fs: Arc<dyn Fs>,
 108    client_state: Option<ProjectClientState>,
 109    collaborators: HashMap<proto::PeerId, Collaborator>,
 110    client_subscriptions: Vec<client::Subscription>,
 111    _subscriptions: Vec<gpui::Subscription>,
 112    opened_buffer: (watch::Sender<()>, watch::Receiver<()>),
 113    shared_buffers: HashMap<proto::PeerId, HashSet<u64>>,
 114    #[allow(clippy::type_complexity)]
 115    loading_buffers_by_path: HashMap<
 116        ProjectPath,
 117        postage::watch::Receiver<Option<Result<ModelHandle<Buffer>, Arc<anyhow::Error>>>>,
 118    >,
 119    #[allow(clippy::type_complexity)]
 120    loading_local_worktrees:
 121        HashMap<Arc<Path>, Shared<Task<Result<ModelHandle<Worktree>, Arc<anyhow::Error>>>>>,
 122    opened_buffers: HashMap<u64, OpenBuffer>,
 123    /// A mapping from a buffer ID to None means that we've started waiting for an ID but haven't finished loading it.
 124    /// Used for re-issuing buffer requests when peers temporarily disconnect
 125    incomplete_remote_buffers: HashMap<u64, Option<ModelHandle<Buffer>>>,
 126    buffer_snapshots: HashMap<u64, HashMap<LanguageServerId, Vec<LspBufferSnapshot>>>, // buffer_id -> server_id -> vec of snapshots
 127    buffers_being_formatted: HashSet<usize>,
 128    nonce: u128,
 129    _maintain_buffer_languages: Task<()>,
 130    _maintain_workspace_config: Task<()>,
 131    terminals: Terminals,
 132    copilot_enabled: bool,
 133}
 134
 135struct LspBufferSnapshot {
 136    version: i32,
 137    snapshot: TextBufferSnapshot,
 138}
 139
 140/// Message ordered with respect to buffer operations
 141enum BufferOrderedMessage {
 142    Operation {
 143        buffer_id: u64,
 144        operation: proto::Operation,
 145    },
 146    LanguageServerUpdate {
 147        language_server_id: LanguageServerId,
 148        message: proto::update_language_server::Variant,
 149    },
 150    Resync,
 151}
 152
 153enum LocalProjectUpdate {
 154    WorktreesChanged,
 155    CreateBufferForPeer {
 156        peer_id: proto::PeerId,
 157        buffer_id: u64,
 158    },
 159}
 160
 161enum OpenBuffer {
 162    Strong(ModelHandle<Buffer>),
 163    Weak(WeakModelHandle<Buffer>),
 164    Operations(Vec<Operation>),
 165}
 166
 167enum WorktreeHandle {
 168    Strong(ModelHandle<Worktree>),
 169    Weak(WeakModelHandle<Worktree>),
 170}
 171
 172enum ProjectClientState {
 173    Local {
 174        remote_id: u64,
 175        updates_tx: mpsc::UnboundedSender<LocalProjectUpdate>,
 176        _send_updates: Task<()>,
 177    },
 178    Remote {
 179        sharing_has_stopped: bool,
 180        remote_id: u64,
 181        replica_id: ReplicaId,
 182    },
 183}
 184
 185#[derive(Clone, Debug)]
 186pub struct Collaborator {
 187    pub peer_id: proto::PeerId,
 188    pub replica_id: ReplicaId,
 189}
 190
 191#[derive(Clone, Debug, PartialEq, Eq)]
 192pub enum Event {
 193    LanguageServerAdded(LanguageServerId),
 194    LanguageServerRemoved(LanguageServerId),
 195    ActiveEntryChanged(Option<ProjectEntryId>),
 196    WorktreeAdded,
 197    WorktreeRemoved(WorktreeId),
 198    DiskBasedDiagnosticsStarted {
 199        language_server_id: LanguageServerId,
 200    },
 201    DiskBasedDiagnosticsFinished {
 202        language_server_id: LanguageServerId,
 203    },
 204    DiagnosticsUpdated {
 205        path: ProjectPath,
 206        language_server_id: LanguageServerId,
 207    },
 208    RemoteIdChanged(Option<u64>),
 209    DisconnectedFromHost,
 210    Closed,
 211    CollaboratorUpdated {
 212        old_peer_id: proto::PeerId,
 213        new_peer_id: proto::PeerId,
 214    },
 215    CollaboratorLeft(proto::PeerId),
 216}
 217
 218pub enum LanguageServerState {
 219    Starting(Task<Option<Arc<LanguageServer>>>),
 220    Running {
 221        language: Arc<Language>,
 222        adapter: Arc<CachedLspAdapter>,
 223        server: Arc<LanguageServer>,
 224        watched_paths: LspGlobSet,
 225        simulate_disk_based_diagnostics_completion: Option<Task<()>>,
 226    },
 227}
 228
 229#[derive(Serialize)]
 230pub struct LanguageServerStatus {
 231    pub name: String,
 232    pub pending_work: BTreeMap<String, LanguageServerProgress>,
 233    pub has_pending_diagnostic_updates: bool,
 234    progress_tokens: HashSet<String>,
 235}
 236
 237#[derive(Clone, Debug, Serialize)]
 238pub struct LanguageServerProgress {
 239    pub message: Option<String>,
 240    pub percentage: Option<usize>,
 241    #[serde(skip_serializing)]
 242    pub last_update_at: Instant,
 243}
 244
 245#[derive(Clone, Debug, Eq, PartialEq, Hash, PartialOrd, Ord)]
 246pub struct ProjectPath {
 247    pub worktree_id: WorktreeId,
 248    pub path: Arc<Path>,
 249}
 250
 251#[derive(Copy, Clone, Debug, Default, PartialEq, Serialize)]
 252pub struct DiagnosticSummary {
 253    pub error_count: usize,
 254    pub warning_count: usize,
 255}
 256
 257#[derive(Debug, Clone)]
 258pub struct Location {
 259    pub buffer: ModelHandle<Buffer>,
 260    pub range: Range<language::Anchor>,
 261}
 262
 263#[derive(Debug, Clone)]
 264pub struct LocationLink {
 265    pub origin: Option<Location>,
 266    pub target: Location,
 267}
 268
 269#[derive(Debug)]
 270pub struct DocumentHighlight {
 271    pub range: Range<language::Anchor>,
 272    pub kind: DocumentHighlightKind,
 273}
 274
 275#[derive(Clone, Debug)]
 276pub struct Symbol {
 277    pub language_server_name: LanguageServerName,
 278    pub source_worktree_id: WorktreeId,
 279    pub path: ProjectPath,
 280    pub label: CodeLabel,
 281    pub name: String,
 282    pub kind: lsp::SymbolKind,
 283    pub range: Range<Unclipped<PointUtf16>>,
 284    pub signature: [u8; 32],
 285}
 286
 287#[derive(Clone, Debug, PartialEq)]
 288pub struct HoverBlock {
 289    pub text: String,
 290    pub language: Option<String>,
 291}
 292
 293impl HoverBlock {
 294    fn try_new(marked_string: MarkedString) -> Option<Self> {
 295        let result = match marked_string {
 296            MarkedString::LanguageString(LanguageString { language, value }) => HoverBlock {
 297                text: value,
 298                language: Some(language),
 299            },
 300            MarkedString::String(text) => HoverBlock {
 301                text,
 302                language: None,
 303            },
 304        };
 305        if result.text.is_empty() {
 306            None
 307        } else {
 308            Some(result)
 309        }
 310    }
 311}
 312
 313#[derive(Debug)]
 314pub struct Hover {
 315    pub contents: Vec<HoverBlock>,
 316    pub range: Option<Range<language::Anchor>>,
 317}
 318
 319#[derive(Default)]
 320pub struct ProjectTransaction(pub HashMap<ModelHandle<Buffer>, language::Transaction>);
 321
 322impl DiagnosticSummary {
 323    fn new<'a, T: 'a>(diagnostics: impl IntoIterator<Item = &'a DiagnosticEntry<T>>) -> Self {
 324        let mut this = Self {
 325            error_count: 0,
 326            warning_count: 0,
 327        };
 328
 329        for entry in diagnostics {
 330            if entry.diagnostic.is_primary {
 331                match entry.diagnostic.severity {
 332                    DiagnosticSeverity::ERROR => this.error_count += 1,
 333                    DiagnosticSeverity::WARNING => this.warning_count += 1,
 334                    _ => {}
 335                }
 336            }
 337        }
 338
 339        this
 340    }
 341
 342    pub fn is_empty(&self) -> bool {
 343        self.error_count == 0 && self.warning_count == 0
 344    }
 345
 346    pub fn to_proto(
 347        &self,
 348        language_server_id: LanguageServerId,
 349        path: &Path,
 350    ) -> proto::DiagnosticSummary {
 351        proto::DiagnosticSummary {
 352            path: path.to_string_lossy().to_string(),
 353            language_server_id: language_server_id.0 as u64,
 354            error_count: self.error_count as u32,
 355            warning_count: self.warning_count as u32,
 356        }
 357    }
 358}
 359
 360#[derive(Clone, Copy, Debug, Default, Hash, PartialEq, Eq, PartialOrd, Ord)]
 361pub struct ProjectEntryId(usize);
 362
 363impl ProjectEntryId {
 364    pub const MAX: Self = Self(usize::MAX);
 365
 366    pub fn new(counter: &AtomicUsize) -> Self {
 367        Self(counter.fetch_add(1, SeqCst))
 368    }
 369
 370    pub fn from_proto(id: u64) -> Self {
 371        Self(id as usize)
 372    }
 373
 374    pub fn to_proto(&self) -> u64 {
 375        self.0 as u64
 376    }
 377
 378    pub fn to_usize(&self) -> usize {
 379        self.0
 380    }
 381}
 382
 383#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 384pub enum FormatTrigger {
 385    Save,
 386    Manual,
 387}
 388
 389impl FormatTrigger {
 390    fn from_proto(value: i32) -> FormatTrigger {
 391        match value {
 392            0 => FormatTrigger::Save,
 393            1 => FormatTrigger::Manual,
 394            _ => FormatTrigger::Save,
 395        }
 396    }
 397}
 398
 399impl Project {
 400    pub fn init(client: &Arc<Client>) {
 401        client.add_model_message_handler(Self::handle_add_collaborator);
 402        client.add_model_message_handler(Self::handle_update_project_collaborator);
 403        client.add_model_message_handler(Self::handle_remove_collaborator);
 404        client.add_model_message_handler(Self::handle_buffer_reloaded);
 405        client.add_model_message_handler(Self::handle_buffer_saved);
 406        client.add_model_message_handler(Self::handle_start_language_server);
 407        client.add_model_message_handler(Self::handle_update_language_server);
 408        client.add_model_message_handler(Self::handle_update_project);
 409        client.add_model_message_handler(Self::handle_unshare_project);
 410        client.add_model_message_handler(Self::handle_create_buffer_for_peer);
 411        client.add_model_message_handler(Self::handle_update_buffer_file);
 412        client.add_model_request_handler(Self::handle_update_buffer);
 413        client.add_model_message_handler(Self::handle_update_diagnostic_summary);
 414        client.add_model_message_handler(Self::handle_update_worktree);
 415        client.add_model_request_handler(Self::handle_create_project_entry);
 416        client.add_model_request_handler(Self::handle_rename_project_entry);
 417        client.add_model_request_handler(Self::handle_copy_project_entry);
 418        client.add_model_request_handler(Self::handle_delete_project_entry);
 419        client.add_model_request_handler(Self::handle_apply_additional_edits_for_completion);
 420        client.add_model_request_handler(Self::handle_apply_code_action);
 421        client.add_model_request_handler(Self::handle_reload_buffers);
 422        client.add_model_request_handler(Self::handle_synchronize_buffers);
 423        client.add_model_request_handler(Self::handle_format_buffers);
 424        client.add_model_request_handler(Self::handle_lsp_command::<GetCodeActions>);
 425        client.add_model_request_handler(Self::handle_lsp_command::<GetCompletions>);
 426        client.add_model_request_handler(Self::handle_lsp_command::<GetHover>);
 427        client.add_model_request_handler(Self::handle_lsp_command::<GetDefinition>);
 428        client.add_model_request_handler(Self::handle_lsp_command::<GetTypeDefinition>);
 429        client.add_model_request_handler(Self::handle_lsp_command::<GetDocumentHighlights>);
 430        client.add_model_request_handler(Self::handle_lsp_command::<GetReferences>);
 431        client.add_model_request_handler(Self::handle_lsp_command::<PrepareRename>);
 432        client.add_model_request_handler(Self::handle_lsp_command::<PerformRename>);
 433        client.add_model_request_handler(Self::handle_search_project);
 434        client.add_model_request_handler(Self::handle_get_project_symbols);
 435        client.add_model_request_handler(Self::handle_open_buffer_for_symbol);
 436        client.add_model_request_handler(Self::handle_open_buffer_by_id);
 437        client.add_model_request_handler(Self::handle_open_buffer_by_path);
 438        client.add_model_request_handler(Self::handle_save_buffer);
 439        client.add_model_message_handler(Self::handle_update_diff_base);
 440    }
 441
 442    pub fn local(
 443        client: Arc<Client>,
 444        user_store: ModelHandle<UserStore>,
 445        languages: Arc<LanguageRegistry>,
 446        fs: Arc<dyn Fs>,
 447        cx: &mut AppContext,
 448    ) -> ModelHandle<Self> {
 449        cx.add_model(|cx: &mut ModelContext<Self>| {
 450            let (tx, rx) = mpsc::unbounded();
 451            cx.spawn_weak(|this, cx| Self::send_buffer_ordered_messages(this, rx, cx))
 452                .detach();
 453            Self {
 454                worktrees: Default::default(),
 455                buffer_ordered_messages_tx: tx,
 456                collaborators: Default::default(),
 457                opened_buffers: Default::default(),
 458                shared_buffers: Default::default(),
 459                incomplete_remote_buffers: Default::default(),
 460                loading_buffers_by_path: Default::default(),
 461                loading_local_worktrees: Default::default(),
 462                buffer_snapshots: Default::default(),
 463                join_project_response_message_id: 0,
 464                client_state: None,
 465                opened_buffer: watch::channel(),
 466                client_subscriptions: Vec::new(),
 467                _subscriptions: vec![cx.observe_global::<Settings, _>(Self::on_settings_changed)],
 468                _maintain_buffer_languages: Self::maintain_buffer_languages(&languages, cx),
 469                _maintain_workspace_config: Self::maintain_workspace_config(languages.clone(), cx),
 470                active_entry: None,
 471                languages,
 472                client,
 473                user_store,
 474                fs,
 475                next_entry_id: Default::default(),
 476                next_diagnostic_group_id: Default::default(),
 477                language_servers: Default::default(),
 478                language_server_ids: Default::default(),
 479                language_server_statuses: Default::default(),
 480                last_workspace_edits_by_language_server: Default::default(),
 481                buffers_being_formatted: Default::default(),
 482                nonce: StdRng::from_entropy().gen(),
 483                terminals: Terminals {
 484                    local_handles: Vec::new(),
 485                },
 486                copilot_enabled: Copilot::global(cx).is_some(),
 487            }
 488        })
 489    }
 490
 491    pub async fn remote(
 492        remote_id: u64,
 493        client: Arc<Client>,
 494        user_store: ModelHandle<UserStore>,
 495        languages: Arc<LanguageRegistry>,
 496        fs: Arc<dyn Fs>,
 497        mut cx: AsyncAppContext,
 498    ) -> Result<ModelHandle<Self>> {
 499        client.authenticate_and_connect(true, &cx).await?;
 500
 501        let subscription = client.subscribe_to_entity(remote_id)?;
 502        let response = client
 503            .request_envelope(proto::JoinProject {
 504                project_id: remote_id,
 505            })
 506            .await?;
 507        let this = cx.add_model(|cx| {
 508            let replica_id = response.payload.replica_id as ReplicaId;
 509
 510            let mut worktrees = Vec::new();
 511            for worktree in response.payload.worktrees {
 512                let worktree = cx.update(|cx| {
 513                    Worktree::remote(remote_id, replica_id, worktree, client.clone(), cx)
 514                });
 515                worktrees.push(worktree);
 516            }
 517
 518            let (tx, rx) = mpsc::unbounded();
 519            cx.spawn_weak(|this, cx| Self::send_buffer_ordered_messages(this, rx, cx))
 520                .detach();
 521            let mut this = Self {
 522                worktrees: Vec::new(),
 523                buffer_ordered_messages_tx: tx,
 524                loading_buffers_by_path: Default::default(),
 525                opened_buffer: watch::channel(),
 526                shared_buffers: Default::default(),
 527                incomplete_remote_buffers: Default::default(),
 528                loading_local_worktrees: Default::default(),
 529                active_entry: None,
 530                collaborators: Default::default(),
 531                join_project_response_message_id: response.message_id,
 532                _maintain_buffer_languages: Self::maintain_buffer_languages(&languages, cx),
 533                _maintain_workspace_config: Self::maintain_workspace_config(languages.clone(), cx),
 534                languages,
 535                user_store: user_store.clone(),
 536                fs,
 537                next_entry_id: Default::default(),
 538                next_diagnostic_group_id: Default::default(),
 539                client_subscriptions: Default::default(),
 540                _subscriptions: Default::default(),
 541                client: client.clone(),
 542                client_state: Some(ProjectClientState::Remote {
 543                    sharing_has_stopped: false,
 544                    remote_id,
 545                    replica_id,
 546                }),
 547                language_servers: Default::default(),
 548                language_server_ids: Default::default(),
 549                language_server_statuses: response
 550                    .payload
 551                    .language_servers
 552                    .into_iter()
 553                    .map(|server| {
 554                        (
 555                            LanguageServerId(server.id as usize),
 556                            LanguageServerStatus {
 557                                name: server.name,
 558                                pending_work: Default::default(),
 559                                has_pending_diagnostic_updates: false,
 560                                progress_tokens: Default::default(),
 561                            },
 562                        )
 563                    })
 564                    .collect(),
 565                last_workspace_edits_by_language_server: Default::default(),
 566                opened_buffers: Default::default(),
 567                buffers_being_formatted: Default::default(),
 568                buffer_snapshots: Default::default(),
 569                nonce: StdRng::from_entropy().gen(),
 570                terminals: Terminals {
 571                    local_handles: Vec::new(),
 572                },
 573                copilot_enabled: Copilot::global(cx).is_some(),
 574            };
 575            for worktree in worktrees {
 576                let _ = this.add_worktree(&worktree, cx);
 577            }
 578            this
 579        });
 580        let subscription = subscription.set_model(&this, &mut cx);
 581
 582        let user_ids = response
 583            .payload
 584            .collaborators
 585            .iter()
 586            .map(|peer| peer.user_id)
 587            .collect();
 588        user_store
 589            .update(&mut cx, |user_store, cx| user_store.get_users(user_ids, cx))
 590            .await?;
 591
 592        this.update(&mut cx, |this, cx| {
 593            this.set_collaborators_from_proto(response.payload.collaborators, cx)?;
 594            this.client_subscriptions.push(subscription);
 595            anyhow::Ok(())
 596        })?;
 597
 598        Ok(this)
 599    }
 600
 601    #[cfg(any(test, feature = "test-support"))]
 602    pub async fn test(
 603        fs: Arc<dyn Fs>,
 604        root_paths: impl IntoIterator<Item = &Path>,
 605        cx: &mut gpui::TestAppContext,
 606    ) -> ModelHandle<Project> {
 607        if !cx.read(|cx| cx.has_global::<Settings>()) {
 608            cx.update(|cx| {
 609                cx.set_global(Settings::test(cx));
 610            });
 611        }
 612
 613        let mut languages = LanguageRegistry::test();
 614        languages.set_executor(cx.background());
 615        let http_client = util::http::FakeHttpClient::with_404_response();
 616        let client = cx.update(|cx| client::Client::new(http_client.clone(), cx));
 617        let user_store = cx.add_model(|cx| UserStore::new(client.clone(), http_client, cx));
 618        let project =
 619            cx.update(|cx| Project::local(client, user_store, Arc::new(languages), fs, cx));
 620        for path in root_paths {
 621            let (tree, _) = project
 622                .update(cx, |project, cx| {
 623                    project.find_or_create_local_worktree(path, true, cx)
 624                })
 625                .await
 626                .unwrap();
 627            tree.read_with(cx, |tree, _| tree.as_local().unwrap().scan_complete())
 628                .await;
 629        }
 630        project
 631    }
 632
 633    fn on_settings_changed(&mut self, cx: &mut ModelContext<Self>) {
 634        let settings = cx.global::<Settings>();
 635
 636        let mut language_servers_to_start = Vec::new();
 637        for buffer in self.opened_buffers.values() {
 638            if let Some(buffer) = buffer.upgrade(cx) {
 639                let buffer = buffer.read(cx);
 640                if let Some((file, language)) = File::from_dyn(buffer.file()).zip(buffer.language())
 641                {
 642                    if settings.enable_language_server(Some(&language.name())) {
 643                        let worktree = file.worktree.read(cx);
 644                        language_servers_to_start.push((
 645                            worktree.id(),
 646                            worktree.as_local().unwrap().abs_path().clone(),
 647                            language.clone(),
 648                        ));
 649                    }
 650                }
 651            }
 652        }
 653
 654        let mut language_servers_to_stop = Vec::new();
 655        for language in self.languages.to_vec() {
 656            for lsp_adapter in language.lsp_adapters() {
 657                if !settings.enable_language_server(Some(&language.name())) {
 658                    let lsp_name = &lsp_adapter.name;
 659                    for (worktree_id, started_lsp_name) in self.language_server_ids.keys() {
 660                        if lsp_name == started_lsp_name {
 661                            language_servers_to_stop.push((*worktree_id, started_lsp_name.clone()));
 662                        }
 663                    }
 664                }
 665            }
 666        }
 667
 668        // Stop all newly-disabled language servers.
 669        for (worktree_id, adapter_name) in language_servers_to_stop {
 670            self.stop_language_server(worktree_id, adapter_name, cx)
 671                .detach();
 672        }
 673
 674        // Start all the newly-enabled language servers.
 675        for (worktree_id, worktree_path, language) in language_servers_to_start {
 676            self.start_language_servers(worktree_id, worktree_path, language, cx);
 677        }
 678
 679        if !self.copilot_enabled && Copilot::global(cx).is_some() {
 680            self.copilot_enabled = true;
 681            for buffer in self.opened_buffers.values() {
 682                if let Some(buffer) = buffer.upgrade(cx) {
 683                    self.register_buffer_with_copilot(&buffer, cx);
 684                }
 685            }
 686        }
 687
 688        cx.notify();
 689    }
 690
 691    pub fn buffer_for_id(&self, remote_id: u64, cx: &AppContext) -> Option<ModelHandle<Buffer>> {
 692        self.opened_buffers
 693            .get(&remote_id)
 694            .and_then(|buffer| buffer.upgrade(cx))
 695    }
 696
 697    pub fn languages(&self) -> &Arc<LanguageRegistry> {
 698        &self.languages
 699    }
 700
 701    pub fn client(&self) -> Arc<Client> {
 702        self.client.clone()
 703    }
 704
 705    pub fn user_store(&self) -> ModelHandle<UserStore> {
 706        self.user_store.clone()
 707    }
 708
 709    #[cfg(any(test, feature = "test-support"))]
 710    pub fn opened_buffers(&self, cx: &AppContext) -> Vec<ModelHandle<Buffer>> {
 711        self.opened_buffers
 712            .values()
 713            .filter_map(|b| b.upgrade(cx))
 714            .collect()
 715    }
 716
 717    #[cfg(any(test, feature = "test-support"))]
 718    pub fn has_open_buffer(&self, path: impl Into<ProjectPath>, cx: &AppContext) -> bool {
 719        let path = path.into();
 720        if let Some(worktree) = self.worktree_for_id(path.worktree_id, cx) {
 721            self.opened_buffers.iter().any(|(_, buffer)| {
 722                if let Some(buffer) = buffer.upgrade(cx) {
 723                    if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
 724                        if file.worktree == worktree && file.path() == &path.path {
 725                            return true;
 726                        }
 727                    }
 728                }
 729                false
 730            })
 731        } else {
 732            false
 733        }
 734    }
 735
 736    pub fn fs(&self) -> &Arc<dyn Fs> {
 737        &self.fs
 738    }
 739
 740    pub fn remote_id(&self) -> Option<u64> {
 741        match self.client_state.as_ref()? {
 742            ProjectClientState::Local { remote_id, .. }
 743            | ProjectClientState::Remote { remote_id, .. } => Some(*remote_id),
 744        }
 745    }
 746
 747    pub fn replica_id(&self) -> ReplicaId {
 748        match &self.client_state {
 749            Some(ProjectClientState::Remote { replica_id, .. }) => *replica_id,
 750            _ => 0,
 751        }
 752    }
 753
 754    fn metadata_changed(&mut self, cx: &mut ModelContext<Self>) {
 755        if let Some(ProjectClientState::Local { updates_tx, .. }) = &mut self.client_state {
 756            updates_tx
 757                .unbounded_send(LocalProjectUpdate::WorktreesChanged)
 758                .ok();
 759        }
 760        cx.notify();
 761    }
 762
 763    pub fn collaborators(&self) -> &HashMap<proto::PeerId, Collaborator> {
 764        &self.collaborators
 765    }
 766
 767    /// Collect all worktrees, including ones that don't appear in the project panel
 768    pub fn worktrees<'a>(
 769        &'a self,
 770        cx: &'a AppContext,
 771    ) -> impl 'a + DoubleEndedIterator<Item = ModelHandle<Worktree>> {
 772        self.worktrees
 773            .iter()
 774            .filter_map(move |worktree| worktree.upgrade(cx))
 775    }
 776
 777    /// Collect all user-visible worktrees, the ones that appear in the project panel
 778    pub fn visible_worktrees<'a>(
 779        &'a self,
 780        cx: &'a AppContext,
 781    ) -> impl 'a + DoubleEndedIterator<Item = ModelHandle<Worktree>> {
 782        self.worktrees.iter().filter_map(|worktree| {
 783            worktree.upgrade(cx).and_then(|worktree| {
 784                if worktree.read(cx).is_visible() {
 785                    Some(worktree)
 786                } else {
 787                    None
 788                }
 789            })
 790        })
 791    }
 792
 793    pub fn worktree_root_names<'a>(&'a self, cx: &'a AppContext) -> impl Iterator<Item = &'a str> {
 794        self.visible_worktrees(cx)
 795            .map(|tree| tree.read(cx).root_name())
 796    }
 797
 798    pub fn worktree_for_id(
 799        &self,
 800        id: WorktreeId,
 801        cx: &AppContext,
 802    ) -> Option<ModelHandle<Worktree>> {
 803        self.worktrees(cx)
 804            .find(|worktree| worktree.read(cx).id() == id)
 805    }
 806
 807    pub fn worktree_for_entry(
 808        &self,
 809        entry_id: ProjectEntryId,
 810        cx: &AppContext,
 811    ) -> Option<ModelHandle<Worktree>> {
 812        self.worktrees(cx)
 813            .find(|worktree| worktree.read(cx).contains_entry(entry_id))
 814    }
 815
 816    pub fn worktree_id_for_entry(
 817        &self,
 818        entry_id: ProjectEntryId,
 819        cx: &AppContext,
 820    ) -> Option<WorktreeId> {
 821        self.worktree_for_entry(entry_id, cx)
 822            .map(|worktree| worktree.read(cx).id())
 823    }
 824
 825    pub fn contains_paths(&self, paths: &[PathBuf], cx: &AppContext) -> bool {
 826        paths.iter().all(|path| self.contains_path(path, cx))
 827    }
 828
 829    pub fn contains_path(&self, path: &Path, cx: &AppContext) -> bool {
 830        for worktree in self.worktrees(cx) {
 831            let worktree = worktree.read(cx).as_local();
 832            if worktree.map_or(false, |w| w.contains_abs_path(path)) {
 833                return true;
 834            }
 835        }
 836        false
 837    }
 838
 839    pub fn create_entry(
 840        &mut self,
 841        project_path: impl Into<ProjectPath>,
 842        is_directory: bool,
 843        cx: &mut ModelContext<Self>,
 844    ) -> Option<Task<Result<Entry>>> {
 845        let project_path = project_path.into();
 846        let worktree = self.worktree_for_id(project_path.worktree_id, cx)?;
 847        if self.is_local() {
 848            Some(worktree.update(cx, |worktree, cx| {
 849                worktree
 850                    .as_local_mut()
 851                    .unwrap()
 852                    .create_entry(project_path.path, is_directory, cx)
 853            }))
 854        } else {
 855            let client = self.client.clone();
 856            let project_id = self.remote_id().unwrap();
 857            Some(cx.spawn_weak(|_, mut cx| async move {
 858                let response = client
 859                    .request(proto::CreateProjectEntry {
 860                        worktree_id: project_path.worktree_id.to_proto(),
 861                        project_id,
 862                        path: project_path.path.to_string_lossy().into(),
 863                        is_directory,
 864                    })
 865                    .await?;
 866                let entry = response
 867                    .entry
 868                    .ok_or_else(|| anyhow!("missing entry in response"))?;
 869                worktree
 870                    .update(&mut cx, |worktree, cx| {
 871                        worktree.as_remote_mut().unwrap().insert_entry(
 872                            entry,
 873                            response.worktree_scan_id as usize,
 874                            cx,
 875                        )
 876                    })
 877                    .await
 878            }))
 879        }
 880    }
 881
 882    pub fn copy_entry(
 883        &mut self,
 884        entry_id: ProjectEntryId,
 885        new_path: impl Into<Arc<Path>>,
 886        cx: &mut ModelContext<Self>,
 887    ) -> Option<Task<Result<Entry>>> {
 888        let worktree = self.worktree_for_entry(entry_id, cx)?;
 889        let new_path = new_path.into();
 890        if self.is_local() {
 891            worktree.update(cx, |worktree, cx| {
 892                worktree
 893                    .as_local_mut()
 894                    .unwrap()
 895                    .copy_entry(entry_id, new_path, cx)
 896            })
 897        } else {
 898            let client = self.client.clone();
 899            let project_id = self.remote_id().unwrap();
 900
 901            Some(cx.spawn_weak(|_, mut cx| async move {
 902                let response = client
 903                    .request(proto::CopyProjectEntry {
 904                        project_id,
 905                        entry_id: entry_id.to_proto(),
 906                        new_path: new_path.to_string_lossy().into(),
 907                    })
 908                    .await?;
 909                let entry = response
 910                    .entry
 911                    .ok_or_else(|| anyhow!("missing entry in response"))?;
 912                worktree
 913                    .update(&mut cx, |worktree, cx| {
 914                        worktree.as_remote_mut().unwrap().insert_entry(
 915                            entry,
 916                            response.worktree_scan_id as usize,
 917                            cx,
 918                        )
 919                    })
 920                    .await
 921            }))
 922        }
 923    }
 924
 925    pub fn rename_entry(
 926        &mut self,
 927        entry_id: ProjectEntryId,
 928        new_path: impl Into<Arc<Path>>,
 929        cx: &mut ModelContext<Self>,
 930    ) -> Option<Task<Result<Entry>>> {
 931        let worktree = self.worktree_for_entry(entry_id, cx)?;
 932        let new_path = new_path.into();
 933        if self.is_local() {
 934            worktree.update(cx, |worktree, cx| {
 935                worktree
 936                    .as_local_mut()
 937                    .unwrap()
 938                    .rename_entry(entry_id, new_path, cx)
 939            })
 940        } else {
 941            let client = self.client.clone();
 942            let project_id = self.remote_id().unwrap();
 943
 944            Some(cx.spawn_weak(|_, mut cx| async move {
 945                let response = client
 946                    .request(proto::RenameProjectEntry {
 947                        project_id,
 948                        entry_id: entry_id.to_proto(),
 949                        new_path: new_path.to_string_lossy().into(),
 950                    })
 951                    .await?;
 952                let entry = response
 953                    .entry
 954                    .ok_or_else(|| anyhow!("missing entry in response"))?;
 955                worktree
 956                    .update(&mut cx, |worktree, cx| {
 957                        worktree.as_remote_mut().unwrap().insert_entry(
 958                            entry,
 959                            response.worktree_scan_id as usize,
 960                            cx,
 961                        )
 962                    })
 963                    .await
 964            }))
 965        }
 966    }
 967
 968    pub fn delete_entry(
 969        &mut self,
 970        entry_id: ProjectEntryId,
 971        cx: &mut ModelContext<Self>,
 972    ) -> Option<Task<Result<()>>> {
 973        let worktree = self.worktree_for_entry(entry_id, cx)?;
 974        if self.is_local() {
 975            worktree.update(cx, |worktree, cx| {
 976                worktree.as_local_mut().unwrap().delete_entry(entry_id, cx)
 977            })
 978        } else {
 979            let client = self.client.clone();
 980            let project_id = self.remote_id().unwrap();
 981            Some(cx.spawn_weak(|_, mut cx| async move {
 982                let response = client
 983                    .request(proto::DeleteProjectEntry {
 984                        project_id,
 985                        entry_id: entry_id.to_proto(),
 986                    })
 987                    .await?;
 988                worktree
 989                    .update(&mut cx, move |worktree, cx| {
 990                        worktree.as_remote_mut().unwrap().delete_entry(
 991                            entry_id,
 992                            response.worktree_scan_id as usize,
 993                            cx,
 994                        )
 995                    })
 996                    .await
 997            }))
 998        }
 999    }
1000
1001    pub fn shared(&mut self, project_id: u64, cx: &mut ModelContext<Self>) -> Result<()> {
1002        if self.client_state.is_some() {
1003            return Err(anyhow!("project was already shared"));
1004        }
1005        self.client_subscriptions.push(
1006            self.client
1007                .subscribe_to_entity(project_id)?
1008                .set_model(&cx.handle(), &mut cx.to_async()),
1009        );
1010
1011        for open_buffer in self.opened_buffers.values_mut() {
1012            match open_buffer {
1013                OpenBuffer::Strong(_) => {}
1014                OpenBuffer::Weak(buffer) => {
1015                    if let Some(buffer) = buffer.upgrade(cx) {
1016                        *open_buffer = OpenBuffer::Strong(buffer);
1017                    }
1018                }
1019                OpenBuffer::Operations(_) => unreachable!(),
1020            }
1021        }
1022
1023        for worktree_handle in self.worktrees.iter_mut() {
1024            match worktree_handle {
1025                WorktreeHandle::Strong(_) => {}
1026                WorktreeHandle::Weak(worktree) => {
1027                    if let Some(worktree) = worktree.upgrade(cx) {
1028                        *worktree_handle = WorktreeHandle::Strong(worktree);
1029                    }
1030                }
1031            }
1032        }
1033
1034        for (server_id, status) in &self.language_server_statuses {
1035            self.client
1036                .send(proto::StartLanguageServer {
1037                    project_id,
1038                    server: Some(proto::LanguageServer {
1039                        id: server_id.0 as u64,
1040                        name: status.name.clone(),
1041                    }),
1042                })
1043                .log_err();
1044        }
1045
1046        let (updates_tx, mut updates_rx) = mpsc::unbounded();
1047        let client = self.client.clone();
1048        self.client_state = Some(ProjectClientState::Local {
1049            remote_id: project_id,
1050            updates_tx,
1051            _send_updates: cx.spawn_weak(move |this, mut cx| async move {
1052                while let Some(update) = updates_rx.next().await {
1053                    let Some(this) = this.upgrade(&cx) else { break };
1054
1055                    match update {
1056                        LocalProjectUpdate::WorktreesChanged => {
1057                            let worktrees = this
1058                                .read_with(&cx, |this, cx| this.worktrees(cx).collect::<Vec<_>>());
1059                            let update_project = this
1060                                .read_with(&cx, |this, cx| {
1061                                    this.client.request(proto::UpdateProject {
1062                                        project_id,
1063                                        worktrees: this.worktree_metadata_protos(cx),
1064                                    })
1065                                })
1066                                .await;
1067                            if update_project.is_ok() {
1068                                for worktree in worktrees {
1069                                    worktree.update(&mut cx, |worktree, cx| {
1070                                        let worktree = worktree.as_local_mut().unwrap();
1071                                        worktree.share(project_id, cx).detach_and_log_err(cx)
1072                                    });
1073                                }
1074                            }
1075                        }
1076                        LocalProjectUpdate::CreateBufferForPeer { peer_id, buffer_id } => {
1077                            let buffer = this.update(&mut cx, |this, _| {
1078                                let buffer = this.opened_buffers.get(&buffer_id).unwrap();
1079                                let shared_buffers =
1080                                    this.shared_buffers.entry(peer_id).or_default();
1081                                if shared_buffers.insert(buffer_id) {
1082                                    if let OpenBuffer::Strong(buffer) = buffer {
1083                                        Some(buffer.clone())
1084                                    } else {
1085                                        None
1086                                    }
1087                                } else {
1088                                    None
1089                                }
1090                            });
1091
1092                            let Some(buffer) = buffer else { continue };
1093                            let operations =
1094                                buffer.read_with(&cx, |b, cx| b.serialize_ops(None, cx));
1095                            let operations = operations.await;
1096                            let state = buffer.read_with(&cx, |buffer, _| buffer.to_proto());
1097
1098                            let initial_state = proto::CreateBufferForPeer {
1099                                project_id,
1100                                peer_id: Some(peer_id),
1101                                variant: Some(proto::create_buffer_for_peer::Variant::State(state)),
1102                            };
1103                            if client.send(initial_state).log_err().is_some() {
1104                                let client = client.clone();
1105                                cx.background()
1106                                    .spawn(async move {
1107                                        let mut chunks = split_operations(operations).peekable();
1108                                        while let Some(chunk) = chunks.next() {
1109                                            let is_last = chunks.peek().is_none();
1110                                            client.send(proto::CreateBufferForPeer {
1111                                                project_id,
1112                                                peer_id: Some(peer_id),
1113                                                variant: Some(
1114                                                    proto::create_buffer_for_peer::Variant::Chunk(
1115                                                        proto::BufferChunk {
1116                                                            buffer_id,
1117                                                            operations: chunk,
1118                                                            is_last,
1119                                                        },
1120                                                    ),
1121                                                ),
1122                                            })?;
1123                                        }
1124                                        anyhow::Ok(())
1125                                    })
1126                                    .await
1127                                    .log_err();
1128                            }
1129                        }
1130                    }
1131                }
1132            }),
1133        });
1134
1135        self.metadata_changed(cx);
1136        cx.emit(Event::RemoteIdChanged(Some(project_id)));
1137        cx.notify();
1138        Ok(())
1139    }
1140
1141    pub fn reshared(
1142        &mut self,
1143        message: proto::ResharedProject,
1144        cx: &mut ModelContext<Self>,
1145    ) -> Result<()> {
1146        self.shared_buffers.clear();
1147        self.set_collaborators_from_proto(message.collaborators, cx)?;
1148        self.metadata_changed(cx);
1149        Ok(())
1150    }
1151
1152    pub fn rejoined(
1153        &mut self,
1154        message: proto::RejoinedProject,
1155        message_id: u32,
1156        cx: &mut ModelContext<Self>,
1157    ) -> Result<()> {
1158        self.join_project_response_message_id = message_id;
1159        self.set_worktrees_from_proto(message.worktrees, cx)?;
1160        self.set_collaborators_from_proto(message.collaborators, cx)?;
1161        self.language_server_statuses = message
1162            .language_servers
1163            .into_iter()
1164            .map(|server| {
1165                (
1166                    LanguageServerId(server.id as usize),
1167                    LanguageServerStatus {
1168                        name: server.name,
1169                        pending_work: Default::default(),
1170                        has_pending_diagnostic_updates: false,
1171                        progress_tokens: Default::default(),
1172                    },
1173                )
1174            })
1175            .collect();
1176        self.buffer_ordered_messages_tx
1177            .unbounded_send(BufferOrderedMessage::Resync)
1178            .unwrap();
1179        cx.notify();
1180        Ok(())
1181    }
1182
1183    pub fn unshare(&mut self, cx: &mut ModelContext<Self>) -> Result<()> {
1184        self.unshare_internal(cx)?;
1185        self.metadata_changed(cx);
1186        cx.notify();
1187        Ok(())
1188    }
1189
1190    fn unshare_internal(&mut self, cx: &mut AppContext) -> Result<()> {
1191        if self.is_remote() {
1192            return Err(anyhow!("attempted to unshare a remote project"));
1193        }
1194
1195        if let Some(ProjectClientState::Local { remote_id, .. }) = self.client_state.take() {
1196            self.collaborators.clear();
1197            self.shared_buffers.clear();
1198            self.client_subscriptions.clear();
1199
1200            for worktree_handle in self.worktrees.iter_mut() {
1201                if let WorktreeHandle::Strong(worktree) = worktree_handle {
1202                    let is_visible = worktree.update(cx, |worktree, _| {
1203                        worktree.as_local_mut().unwrap().unshare();
1204                        worktree.is_visible()
1205                    });
1206                    if !is_visible {
1207                        *worktree_handle = WorktreeHandle::Weak(worktree.downgrade());
1208                    }
1209                }
1210            }
1211
1212            for open_buffer in self.opened_buffers.values_mut() {
1213                // Wake up any tasks waiting for peers' edits to this buffer.
1214                if let Some(buffer) = open_buffer.upgrade(cx) {
1215                    buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1216                }
1217
1218                if let OpenBuffer::Strong(buffer) = open_buffer {
1219                    *open_buffer = OpenBuffer::Weak(buffer.downgrade());
1220                }
1221            }
1222
1223            self.client.send(proto::UnshareProject {
1224                project_id: remote_id,
1225            })?;
1226
1227            Ok(())
1228        } else {
1229            Err(anyhow!("attempted to unshare an unshared project"))
1230        }
1231    }
1232
1233    pub fn disconnected_from_host(&mut self, cx: &mut ModelContext<Self>) {
1234        self.disconnected_from_host_internal(cx);
1235        cx.emit(Event::DisconnectedFromHost);
1236        cx.notify();
1237    }
1238
1239    fn disconnected_from_host_internal(&mut self, cx: &mut AppContext) {
1240        if let Some(ProjectClientState::Remote {
1241            sharing_has_stopped,
1242            ..
1243        }) = &mut self.client_state
1244        {
1245            *sharing_has_stopped = true;
1246
1247            self.collaborators.clear();
1248
1249            for worktree in &self.worktrees {
1250                if let Some(worktree) = worktree.upgrade(cx) {
1251                    worktree.update(cx, |worktree, _| {
1252                        if let Some(worktree) = worktree.as_remote_mut() {
1253                            worktree.disconnected_from_host();
1254                        }
1255                    });
1256                }
1257            }
1258
1259            for open_buffer in self.opened_buffers.values_mut() {
1260                // Wake up any tasks waiting for peers' edits to this buffer.
1261                if let Some(buffer) = open_buffer.upgrade(cx) {
1262                    buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1263                }
1264
1265                if let OpenBuffer::Strong(buffer) = open_buffer {
1266                    *open_buffer = OpenBuffer::Weak(buffer.downgrade());
1267                }
1268            }
1269
1270            // Wake up all futures currently waiting on a buffer to get opened,
1271            // to give them a chance to fail now that we've disconnected.
1272            *self.opened_buffer.0.borrow_mut() = ();
1273        }
1274    }
1275
1276    pub fn close(&mut self, cx: &mut ModelContext<Self>) {
1277        cx.emit(Event::Closed);
1278    }
1279
1280    pub fn is_read_only(&self) -> bool {
1281        match &self.client_state {
1282            Some(ProjectClientState::Remote {
1283                sharing_has_stopped,
1284                ..
1285            }) => *sharing_has_stopped,
1286            _ => false,
1287        }
1288    }
1289
1290    pub fn is_local(&self) -> bool {
1291        match &self.client_state {
1292            Some(ProjectClientState::Remote { .. }) => false,
1293            _ => true,
1294        }
1295    }
1296
1297    pub fn is_remote(&self) -> bool {
1298        !self.is_local()
1299    }
1300
1301    pub fn create_buffer(
1302        &mut self,
1303        text: &str,
1304        language: Option<Arc<Language>>,
1305        cx: &mut ModelContext<Self>,
1306    ) -> Result<ModelHandle<Buffer>> {
1307        if self.is_remote() {
1308            return Err(anyhow!("creating buffers as a guest is not supported yet"));
1309        }
1310
1311        let buffer = cx.add_model(|cx| {
1312            Buffer::new(self.replica_id(), text, cx)
1313                .with_language(language.unwrap_or_else(|| language::PLAIN_TEXT.clone()), cx)
1314        });
1315        self.register_buffer(&buffer, cx)?;
1316        Ok(buffer)
1317    }
1318
1319    pub fn open_path(
1320        &mut self,
1321        path: impl Into<ProjectPath>,
1322        cx: &mut ModelContext<Self>,
1323    ) -> Task<Result<(ProjectEntryId, AnyModelHandle)>> {
1324        let task = self.open_buffer(path, cx);
1325        cx.spawn_weak(|_, cx| async move {
1326            let buffer = task.await?;
1327            let project_entry_id = buffer
1328                .read_with(&cx, |buffer, cx| {
1329                    File::from_dyn(buffer.file()).and_then(|file| file.project_entry_id(cx))
1330                })
1331                .ok_or_else(|| anyhow!("no project entry"))?;
1332
1333            let buffer: &AnyModelHandle = &buffer;
1334            Ok((project_entry_id, buffer.clone()))
1335        })
1336    }
1337
1338    pub fn open_local_buffer(
1339        &mut self,
1340        abs_path: impl AsRef<Path>,
1341        cx: &mut ModelContext<Self>,
1342    ) -> Task<Result<ModelHandle<Buffer>>> {
1343        if let Some((worktree, relative_path)) = self.find_local_worktree(abs_path.as_ref(), cx) {
1344            self.open_buffer((worktree.read(cx).id(), relative_path), cx)
1345        } else {
1346            Task::ready(Err(anyhow!("no such path")))
1347        }
1348    }
1349
1350    pub fn open_buffer(
1351        &mut self,
1352        path: impl Into<ProjectPath>,
1353        cx: &mut ModelContext<Self>,
1354    ) -> Task<Result<ModelHandle<Buffer>>> {
1355        let project_path = path.into();
1356        let worktree = if let Some(worktree) = self.worktree_for_id(project_path.worktree_id, cx) {
1357            worktree
1358        } else {
1359            return Task::ready(Err(anyhow!("no such worktree")));
1360        };
1361
1362        // If there is already a buffer for the given path, then return it.
1363        let existing_buffer = self.get_open_buffer(&project_path, cx);
1364        if let Some(existing_buffer) = existing_buffer {
1365            return Task::ready(Ok(existing_buffer));
1366        }
1367
1368        let mut loading_watch = match self.loading_buffers_by_path.entry(project_path.clone()) {
1369            // If the given path is already being loaded, then wait for that existing
1370            // task to complete and return the same buffer.
1371            hash_map::Entry::Occupied(e) => e.get().clone(),
1372
1373            // Otherwise, record the fact that this path is now being loaded.
1374            hash_map::Entry::Vacant(entry) => {
1375                let (mut tx, rx) = postage::watch::channel();
1376                entry.insert(rx.clone());
1377
1378                let load_buffer = if worktree.read(cx).is_local() {
1379                    self.open_local_buffer_internal(&project_path.path, &worktree, cx)
1380                } else {
1381                    self.open_remote_buffer_internal(&project_path.path, &worktree, cx)
1382                };
1383
1384                cx.spawn(move |this, mut cx| async move {
1385                    let load_result = load_buffer.await;
1386                    *tx.borrow_mut() = Some(this.update(&mut cx, |this, _| {
1387                        // Record the fact that the buffer is no longer loading.
1388                        this.loading_buffers_by_path.remove(&project_path);
1389                        let buffer = load_result.map_err(Arc::new)?;
1390                        Ok(buffer)
1391                    }));
1392                })
1393                .detach();
1394                rx
1395            }
1396        };
1397
1398        cx.foreground().spawn(async move {
1399            loop {
1400                if let Some(result) = loading_watch.borrow().as_ref() {
1401                    match result {
1402                        Ok(buffer) => return Ok(buffer.clone()),
1403                        Err(error) => return Err(anyhow!("{}", error)),
1404                    }
1405                }
1406                loading_watch.next().await;
1407            }
1408        })
1409    }
1410
1411    fn open_local_buffer_internal(
1412        &mut self,
1413        path: &Arc<Path>,
1414        worktree: &ModelHandle<Worktree>,
1415        cx: &mut ModelContext<Self>,
1416    ) -> Task<Result<ModelHandle<Buffer>>> {
1417        let load_buffer = worktree.update(cx, |worktree, cx| {
1418            let worktree = worktree.as_local_mut().unwrap();
1419            worktree.load_buffer(path, cx)
1420        });
1421        cx.spawn(|this, mut cx| async move {
1422            let buffer = load_buffer.await?;
1423            this.update(&mut cx, |this, cx| this.register_buffer(&buffer, cx))?;
1424            Ok(buffer)
1425        })
1426    }
1427
1428    fn open_remote_buffer_internal(
1429        &mut self,
1430        path: &Arc<Path>,
1431        worktree: &ModelHandle<Worktree>,
1432        cx: &mut ModelContext<Self>,
1433    ) -> Task<Result<ModelHandle<Buffer>>> {
1434        let rpc = self.client.clone();
1435        let project_id = self.remote_id().unwrap();
1436        let remote_worktree_id = worktree.read(cx).id();
1437        let path = path.clone();
1438        let path_string = path.to_string_lossy().to_string();
1439        cx.spawn(|this, mut cx| async move {
1440            let response = rpc
1441                .request(proto::OpenBufferByPath {
1442                    project_id,
1443                    worktree_id: remote_worktree_id.to_proto(),
1444                    path: path_string,
1445                })
1446                .await?;
1447            this.update(&mut cx, |this, cx| {
1448                this.wait_for_remote_buffer(response.buffer_id, cx)
1449            })
1450            .await
1451        })
1452    }
1453
1454    /// LanguageServerName is owned, because it is inserted into a map
1455    fn open_local_buffer_via_lsp(
1456        &mut self,
1457        abs_path: lsp::Url,
1458        language_server_id: LanguageServerId,
1459        language_server_name: LanguageServerName,
1460        cx: &mut ModelContext<Self>,
1461    ) -> Task<Result<ModelHandle<Buffer>>> {
1462        cx.spawn(|this, mut cx| async move {
1463            let abs_path = abs_path
1464                .to_file_path()
1465                .map_err(|_| anyhow!("can't convert URI to path"))?;
1466            let (worktree, relative_path) = if let Some(result) =
1467                this.read_with(&cx, |this, cx| this.find_local_worktree(&abs_path, cx))
1468            {
1469                result
1470            } else {
1471                let worktree = this
1472                    .update(&mut cx, |this, cx| {
1473                        this.create_local_worktree(&abs_path, false, cx)
1474                    })
1475                    .await?;
1476                this.update(&mut cx, |this, cx| {
1477                    this.language_server_ids.insert(
1478                        (worktree.read(cx).id(), language_server_name),
1479                        language_server_id,
1480                    );
1481                });
1482                (worktree, PathBuf::new())
1483            };
1484
1485            let project_path = ProjectPath {
1486                worktree_id: worktree.read_with(&cx, |worktree, _| worktree.id()),
1487                path: relative_path.into(),
1488            };
1489            this.update(&mut cx, |this, cx| this.open_buffer(project_path, cx))
1490                .await
1491        })
1492    }
1493
1494    pub fn open_buffer_by_id(
1495        &mut self,
1496        id: u64,
1497        cx: &mut ModelContext<Self>,
1498    ) -> Task<Result<ModelHandle<Buffer>>> {
1499        if let Some(buffer) = self.buffer_for_id(id, cx) {
1500            Task::ready(Ok(buffer))
1501        } else if self.is_local() {
1502            Task::ready(Err(anyhow!("buffer {} does not exist", id)))
1503        } else if let Some(project_id) = self.remote_id() {
1504            let request = self
1505                .client
1506                .request(proto::OpenBufferById { project_id, id });
1507            cx.spawn(|this, mut cx| async move {
1508                let buffer_id = request.await?.buffer_id;
1509                this.update(&mut cx, |this, cx| {
1510                    this.wait_for_remote_buffer(buffer_id, cx)
1511                })
1512                .await
1513            })
1514        } else {
1515            Task::ready(Err(anyhow!("cannot open buffer while disconnected")))
1516        }
1517    }
1518
1519    pub fn save_buffers(
1520        &self,
1521        buffers: HashSet<ModelHandle<Buffer>>,
1522        cx: &mut ModelContext<Self>,
1523    ) -> Task<Result<()>> {
1524        cx.spawn(|this, mut cx| async move {
1525            let save_tasks = buffers
1526                .into_iter()
1527                .map(|buffer| this.update(&mut cx, |this, cx| this.save_buffer(buffer, cx)));
1528            try_join_all(save_tasks).await?;
1529            Ok(())
1530        })
1531    }
1532
1533    pub fn save_buffer(
1534        &self,
1535        buffer: ModelHandle<Buffer>,
1536        cx: &mut ModelContext<Self>,
1537    ) -> Task<Result<(clock::Global, RopeFingerprint, SystemTime)>> {
1538        let Some(file) = File::from_dyn(buffer.read(cx).file()) else {
1539            return Task::ready(Err(anyhow!("buffer doesn't have a file")));
1540        };
1541        let worktree = file.worktree.clone();
1542        let path = file.path.clone();
1543        worktree.update(cx, |worktree, cx| match worktree {
1544            Worktree::Local(worktree) => worktree.save_buffer(buffer, path, false, cx),
1545            Worktree::Remote(worktree) => worktree.save_buffer(buffer, cx),
1546        })
1547    }
1548
1549    pub fn save_buffer_as(
1550        &mut self,
1551        buffer: ModelHandle<Buffer>,
1552        abs_path: PathBuf,
1553        cx: &mut ModelContext<Self>,
1554    ) -> Task<Result<()>> {
1555        let worktree_task = self.find_or_create_local_worktree(&abs_path, true, cx);
1556        let old_file = File::from_dyn(buffer.read(cx).file())
1557            .filter(|f| f.is_local())
1558            .cloned();
1559        cx.spawn(|this, mut cx| async move {
1560            if let Some(old_file) = &old_file {
1561                this.update(&mut cx, |this, cx| {
1562                    this.unregister_buffer_from_language_servers(&buffer, old_file, cx);
1563                });
1564            }
1565            let (worktree, path) = worktree_task.await?;
1566            worktree
1567                .update(&mut cx, |worktree, cx| match worktree {
1568                    Worktree::Local(worktree) => {
1569                        worktree.save_buffer(buffer.clone(), path.into(), true, cx)
1570                    }
1571                    Worktree::Remote(_) => panic!("cannot remote buffers as new files"),
1572                })
1573                .await?;
1574            this.update(&mut cx, |this, cx| {
1575                this.detect_language_for_buffer(&buffer, cx);
1576                this.register_buffer_with_language_servers(&buffer, cx);
1577            });
1578            Ok(())
1579        })
1580    }
1581
1582    pub fn get_open_buffer(
1583        &mut self,
1584        path: &ProjectPath,
1585        cx: &mut ModelContext<Self>,
1586    ) -> Option<ModelHandle<Buffer>> {
1587        let worktree = self.worktree_for_id(path.worktree_id, cx)?;
1588        self.opened_buffers.values().find_map(|buffer| {
1589            let buffer = buffer.upgrade(cx)?;
1590            let file = File::from_dyn(buffer.read(cx).file())?;
1591            if file.worktree == worktree && file.path() == &path.path {
1592                Some(buffer)
1593            } else {
1594                None
1595            }
1596        })
1597    }
1598
1599    fn register_buffer(
1600        &mut self,
1601        buffer: &ModelHandle<Buffer>,
1602        cx: &mut ModelContext<Self>,
1603    ) -> Result<()> {
1604        buffer.update(cx, |buffer, _| {
1605            buffer.set_language_registry(self.languages.clone())
1606        });
1607
1608        let remote_id = buffer.read(cx).remote_id();
1609        let is_remote = self.is_remote();
1610        let open_buffer = if is_remote || self.is_shared() {
1611            OpenBuffer::Strong(buffer.clone())
1612        } else {
1613            OpenBuffer::Weak(buffer.downgrade())
1614        };
1615
1616        match self.opened_buffers.entry(remote_id) {
1617            hash_map::Entry::Vacant(entry) => {
1618                entry.insert(open_buffer);
1619            }
1620            hash_map::Entry::Occupied(mut entry) => {
1621                if let OpenBuffer::Operations(operations) = entry.get_mut() {
1622                    buffer.update(cx, |b, cx| b.apply_ops(operations.drain(..), cx))?;
1623                } else if entry.get().upgrade(cx).is_some() {
1624                    if is_remote {
1625                        return Ok(());
1626                    } else {
1627                        debug_panic!("buffer {} was already registered", remote_id);
1628                        Err(anyhow!("buffer {} was already registered", remote_id))?;
1629                    }
1630                }
1631                entry.insert(open_buffer);
1632            }
1633        }
1634        cx.subscribe(buffer, |this, buffer, event, cx| {
1635            this.on_buffer_event(buffer, event, cx);
1636        })
1637        .detach();
1638
1639        self.detect_language_for_buffer(buffer, cx);
1640        self.register_buffer_with_language_servers(buffer, cx);
1641        self.register_buffer_with_copilot(buffer, cx);
1642        cx.observe_release(buffer, |this, buffer, cx| {
1643            if let Some(file) = File::from_dyn(buffer.file()) {
1644                if file.is_local() {
1645                    let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
1646                    for server in this.language_servers_for_buffer(buffer, cx) {
1647                        server
1648                            .1
1649                            .notify::<lsp::notification::DidCloseTextDocument>(
1650                                lsp::DidCloseTextDocumentParams {
1651                                    text_document: lsp::TextDocumentIdentifier::new(uri.clone()),
1652                                },
1653                            )
1654                            .log_err();
1655                    }
1656                }
1657            }
1658        })
1659        .detach();
1660
1661        *self.opened_buffer.0.borrow_mut() = ();
1662        Ok(())
1663    }
1664
1665    fn register_buffer_with_language_servers(
1666        &mut self,
1667        buffer_handle: &ModelHandle<Buffer>,
1668        cx: &mut ModelContext<Self>,
1669    ) {
1670        let buffer = buffer_handle.read(cx);
1671        let buffer_id = buffer.remote_id();
1672
1673        if let Some(file) = File::from_dyn(buffer.file()) {
1674            if !file.is_local() {
1675                return;
1676            }
1677
1678            let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
1679            let initial_snapshot = buffer.text_snapshot();
1680            let language = buffer.language().cloned();
1681            let worktree_id = file.worktree_id(cx);
1682
1683            if let Some(local_worktree) = file.worktree.read(cx).as_local() {
1684                for (server_id, diagnostics) in local_worktree.diagnostics_for_path(file.path()) {
1685                    self.update_buffer_diagnostics(buffer_handle, server_id, None, diagnostics, cx)
1686                        .log_err();
1687                }
1688            }
1689
1690            if let Some(language) = language {
1691                for adapter in language.lsp_adapters() {
1692                    let language_id = adapter.language_ids.get(language.name().as_ref()).cloned();
1693                    let server = self
1694                        .language_server_ids
1695                        .get(&(worktree_id, adapter.name.clone()))
1696                        .and_then(|id| self.language_servers.get(id))
1697                        .and_then(|server_state| {
1698                            if let LanguageServerState::Running { server, .. } = server_state {
1699                                Some(server.clone())
1700                            } else {
1701                                None
1702                            }
1703                        });
1704                    let server = match server {
1705                        Some(server) => server,
1706                        None => continue,
1707                    };
1708
1709                    server
1710                        .notify::<lsp::notification::DidOpenTextDocument>(
1711                            lsp::DidOpenTextDocumentParams {
1712                                text_document: lsp::TextDocumentItem::new(
1713                                    uri.clone(),
1714                                    language_id.unwrap_or_default(),
1715                                    0,
1716                                    initial_snapshot.text(),
1717                                ),
1718                            },
1719                        )
1720                        .log_err();
1721
1722                    buffer_handle.update(cx, |buffer, cx| {
1723                        buffer.set_completion_triggers(
1724                            server
1725                                .capabilities()
1726                                .completion_provider
1727                                .as_ref()
1728                                .and_then(|provider| provider.trigger_characters.clone())
1729                                .unwrap_or_default(),
1730                            cx,
1731                        );
1732                    });
1733
1734                    let snapshot = LspBufferSnapshot {
1735                        version: 0,
1736                        snapshot: initial_snapshot.clone(),
1737                    };
1738                    self.buffer_snapshots
1739                        .entry(buffer_id)
1740                        .or_default()
1741                        .insert(server.server_id(), vec![snapshot]);
1742                }
1743            }
1744        }
1745    }
1746
1747    fn unregister_buffer_from_language_servers(
1748        &mut self,
1749        buffer: &ModelHandle<Buffer>,
1750        old_file: &File,
1751        cx: &mut ModelContext<Self>,
1752    ) {
1753        let old_path = match old_file.as_local() {
1754            Some(local) => local.abs_path(cx),
1755            None => return,
1756        };
1757
1758        buffer.update(cx, |buffer, cx| {
1759            let worktree_id = old_file.worktree_id(cx);
1760            let ids = &self.language_server_ids;
1761
1762            let language = buffer.language().cloned();
1763            let adapters = language.iter().flat_map(|language| language.lsp_adapters());
1764            for &server_id in adapters.flat_map(|a| ids.get(&(worktree_id, a.name.clone()))) {
1765                buffer.update_diagnostics(server_id, Default::default(), cx);
1766            }
1767
1768            self.buffer_snapshots.remove(&buffer.remote_id());
1769            let file_url = lsp::Url::from_file_path(old_path).unwrap();
1770            for (_, language_server) in self.language_servers_for_buffer(buffer, cx) {
1771                language_server
1772                    .notify::<lsp::notification::DidCloseTextDocument>(
1773                        lsp::DidCloseTextDocumentParams {
1774                            text_document: lsp::TextDocumentIdentifier::new(file_url.clone()),
1775                        },
1776                    )
1777                    .log_err();
1778            }
1779        });
1780    }
1781
1782    fn register_buffer_with_copilot(
1783        &self,
1784        buffer_handle: &ModelHandle<Buffer>,
1785        cx: &mut ModelContext<Self>,
1786    ) {
1787        if let Some(copilot) = Copilot::global(cx) {
1788            copilot.update(cx, |copilot, cx| copilot.register_buffer(buffer_handle, cx));
1789        }
1790    }
1791
1792    async fn send_buffer_ordered_messages(
1793        this: WeakModelHandle<Self>,
1794        rx: UnboundedReceiver<BufferOrderedMessage>,
1795        mut cx: AsyncAppContext,
1796    ) -> Option<()> {
1797        const MAX_BATCH_SIZE: usize = 128;
1798
1799        let mut operations_by_buffer_id = HashMap::default();
1800        async fn flush_operations(
1801            this: &ModelHandle<Project>,
1802            operations_by_buffer_id: &mut HashMap<u64, Vec<proto::Operation>>,
1803            needs_resync_with_host: &mut bool,
1804            is_local: bool,
1805            cx: &AsyncAppContext,
1806        ) {
1807            for (buffer_id, operations) in operations_by_buffer_id.drain() {
1808                let request = this.read_with(cx, |this, _| {
1809                    let project_id = this.remote_id()?;
1810                    Some(this.client.request(proto::UpdateBuffer {
1811                        buffer_id,
1812                        project_id,
1813                        operations,
1814                    }))
1815                });
1816                if let Some(request) = request {
1817                    if request.await.is_err() && !is_local {
1818                        *needs_resync_with_host = true;
1819                        break;
1820                    }
1821                }
1822            }
1823        }
1824
1825        let mut needs_resync_with_host = false;
1826        let mut changes = rx.ready_chunks(MAX_BATCH_SIZE);
1827
1828        while let Some(changes) = changes.next().await {
1829            let this = this.upgrade(&mut cx)?;
1830            let is_local = this.read_with(&cx, |this, _| this.is_local());
1831
1832            for change in changes {
1833                match change {
1834                    BufferOrderedMessage::Operation {
1835                        buffer_id,
1836                        operation,
1837                    } => {
1838                        if needs_resync_with_host {
1839                            continue;
1840                        }
1841
1842                        operations_by_buffer_id
1843                            .entry(buffer_id)
1844                            .or_insert(Vec::new())
1845                            .push(operation);
1846                    }
1847
1848                    BufferOrderedMessage::Resync => {
1849                        operations_by_buffer_id.clear();
1850                        if this
1851                            .update(&mut cx, |this, cx| this.synchronize_remote_buffers(cx))
1852                            .await
1853                            .is_ok()
1854                        {
1855                            needs_resync_with_host = false;
1856                        }
1857                    }
1858
1859                    BufferOrderedMessage::LanguageServerUpdate {
1860                        language_server_id,
1861                        message,
1862                    } => {
1863                        flush_operations(
1864                            &this,
1865                            &mut operations_by_buffer_id,
1866                            &mut needs_resync_with_host,
1867                            is_local,
1868                            &cx,
1869                        )
1870                        .await;
1871
1872                        this.read_with(&cx, |this, _| {
1873                            if let Some(project_id) = this.remote_id() {
1874                                this.client
1875                                    .send(proto::UpdateLanguageServer {
1876                                        project_id,
1877                                        language_server_id: language_server_id.0 as u64,
1878                                        variant: Some(message),
1879                                    })
1880                                    .log_err();
1881                            }
1882                        });
1883                    }
1884                }
1885            }
1886
1887            flush_operations(
1888                &this,
1889                &mut operations_by_buffer_id,
1890                &mut needs_resync_with_host,
1891                is_local,
1892                &cx,
1893            )
1894            .await;
1895        }
1896
1897        None
1898    }
1899
1900    fn on_buffer_event(
1901        &mut self,
1902        buffer: ModelHandle<Buffer>,
1903        event: &BufferEvent,
1904        cx: &mut ModelContext<Self>,
1905    ) -> Option<()> {
1906        match event {
1907            BufferEvent::Operation(operation) => {
1908                self.buffer_ordered_messages_tx
1909                    .unbounded_send(BufferOrderedMessage::Operation {
1910                        buffer_id: buffer.read(cx).remote_id(),
1911                        operation: language::proto::serialize_operation(operation),
1912                    })
1913                    .ok();
1914            }
1915
1916            BufferEvent::Edited { .. } => {
1917                let buffer = buffer.read(cx);
1918                let file = File::from_dyn(buffer.file())?;
1919                let abs_path = file.as_local()?.abs_path(cx);
1920                let uri = lsp::Url::from_file_path(abs_path).unwrap();
1921                let next_snapshot = buffer.text_snapshot();
1922
1923                let language_servers: Vec<_> = self
1924                    .language_servers_for_buffer(buffer, cx)
1925                    .map(|i| i.1.clone())
1926                    .collect();
1927
1928                for language_server in language_servers {
1929                    let language_server = language_server.clone();
1930
1931                    let buffer_snapshots = self
1932                        .buffer_snapshots
1933                        .get_mut(&buffer.remote_id())
1934                        .and_then(|m| m.get_mut(&language_server.server_id()))?;
1935                    let previous_snapshot = buffer_snapshots.last()?;
1936                    let next_version = previous_snapshot.version + 1;
1937
1938                    let content_changes = buffer
1939                        .edits_since::<(PointUtf16, usize)>(previous_snapshot.snapshot.version())
1940                        .map(|edit| {
1941                            let edit_start = edit.new.start.0;
1942                            let edit_end = edit_start + (edit.old.end.0 - edit.old.start.0);
1943                            let new_text = next_snapshot
1944                                .text_for_range(edit.new.start.1..edit.new.end.1)
1945                                .collect();
1946                            lsp::TextDocumentContentChangeEvent {
1947                                range: Some(lsp::Range::new(
1948                                    point_to_lsp(edit_start),
1949                                    point_to_lsp(edit_end),
1950                                )),
1951                                range_length: None,
1952                                text: new_text,
1953                            }
1954                        })
1955                        .collect();
1956
1957                    buffer_snapshots.push(LspBufferSnapshot {
1958                        version: next_version,
1959                        snapshot: next_snapshot.clone(),
1960                    });
1961
1962                    language_server
1963                        .notify::<lsp::notification::DidChangeTextDocument>(
1964                            lsp::DidChangeTextDocumentParams {
1965                                text_document: lsp::VersionedTextDocumentIdentifier::new(
1966                                    uri.clone(),
1967                                    next_version,
1968                                ),
1969                                content_changes,
1970                            },
1971                        )
1972                        .log_err();
1973                }
1974            }
1975
1976            BufferEvent::Saved => {
1977                let file = File::from_dyn(buffer.read(cx).file())?;
1978                let worktree_id = file.worktree_id(cx);
1979                let abs_path = file.as_local()?.abs_path(cx);
1980                let text_document = lsp::TextDocumentIdentifier {
1981                    uri: lsp::Url::from_file_path(abs_path).unwrap(),
1982                };
1983
1984                for (_, _, server) in self.language_servers_for_worktree(worktree_id) {
1985                    server
1986                        .notify::<lsp::notification::DidSaveTextDocument>(
1987                            lsp::DidSaveTextDocumentParams {
1988                                text_document: text_document.clone(),
1989                                text: None,
1990                            },
1991                        )
1992                        .log_err();
1993                }
1994
1995                let language_server_ids = self.language_server_ids_for_buffer(buffer.read(cx), cx);
1996                for language_server_id in language_server_ids {
1997                    if let Some(LanguageServerState::Running {
1998                        adapter,
1999                        simulate_disk_based_diagnostics_completion,
2000                        ..
2001                    }) = self.language_servers.get_mut(&language_server_id)
2002                    {
2003                        // After saving a buffer using a language server that doesn't provide
2004                        // a disk-based progress token, kick off a timer that will reset every
2005                        // time the buffer is saved. If the timer eventually fires, simulate
2006                        // disk-based diagnostics being finished so that other pieces of UI
2007                        // (e.g., project diagnostics view, diagnostic status bar) can update.
2008                        // We don't emit an event right away because the language server might take
2009                        // some time to publish diagnostics.
2010                        if adapter.disk_based_diagnostics_progress_token.is_none() {
2011                            const DISK_BASED_DIAGNOSTICS_DEBOUNCE: Duration =
2012                                Duration::from_secs(1);
2013
2014                            let task = cx.spawn_weak(|this, mut cx| async move {
2015                                cx.background().timer(DISK_BASED_DIAGNOSTICS_DEBOUNCE).await;
2016                                if let Some(this) = this.upgrade(&cx) {
2017                                    this.update(&mut cx, |this, cx| {
2018                                        this.disk_based_diagnostics_finished(
2019                                            language_server_id,
2020                                            cx,
2021                                        );
2022                                        this.buffer_ordered_messages_tx
2023                                            .unbounded_send(
2024                                                BufferOrderedMessage::LanguageServerUpdate {
2025                                                    language_server_id,
2026                                                    message:proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(Default::default())
2027                                                },
2028                                            )
2029                                            .ok();
2030                                    });
2031                                }
2032                            });
2033                            *simulate_disk_based_diagnostics_completion = Some(task);
2034                        }
2035                    }
2036                }
2037            }
2038
2039            _ => {}
2040        }
2041
2042        None
2043    }
2044
2045    fn language_servers_for_worktree(
2046        &self,
2047        worktree_id: WorktreeId,
2048    ) -> impl Iterator<Item = (&Arc<CachedLspAdapter>, &Arc<Language>, &Arc<LanguageServer>)> {
2049        self.language_server_ids
2050            .iter()
2051            .filter_map(move |((language_server_worktree_id, _), id)| {
2052                if *language_server_worktree_id == worktree_id {
2053                    if let Some(LanguageServerState::Running {
2054                        adapter,
2055                        language,
2056                        server,
2057                        ..
2058                    }) = self.language_servers.get(id)
2059                    {
2060                        return Some((adapter, language, server));
2061                    }
2062                }
2063                None
2064            })
2065    }
2066
2067    fn maintain_buffer_languages(
2068        languages: &LanguageRegistry,
2069        cx: &mut ModelContext<Project>,
2070    ) -> Task<()> {
2071        let mut subscription = languages.subscribe();
2072        cx.spawn_weak(|project, mut cx| async move {
2073            while let Some(()) = subscription.next().await {
2074                if let Some(project) = project.upgrade(&cx) {
2075                    project.update(&mut cx, |project, cx| {
2076                        let mut plain_text_buffers = Vec::new();
2077                        let mut buffers_with_unknown_injections = Vec::new();
2078                        for buffer in project.opened_buffers.values() {
2079                            if let Some(handle) = buffer.upgrade(cx) {
2080                                let buffer = &handle.read(cx);
2081                                if buffer.language().is_none()
2082                                    || buffer.language() == Some(&*language::PLAIN_TEXT)
2083                                {
2084                                    plain_text_buffers.push(handle);
2085                                } else if buffer.contains_unknown_injections() {
2086                                    buffers_with_unknown_injections.push(handle);
2087                                }
2088                            }
2089                        }
2090
2091                        for buffer in plain_text_buffers {
2092                            project.detect_language_for_buffer(&buffer, cx);
2093                            project.register_buffer_with_language_servers(&buffer, cx);
2094                        }
2095
2096                        for buffer in buffers_with_unknown_injections {
2097                            buffer.update(cx, |buffer, cx| buffer.reparse(cx));
2098                        }
2099                    });
2100                }
2101            }
2102        })
2103    }
2104
2105    fn maintain_workspace_config(
2106        languages: Arc<LanguageRegistry>,
2107        cx: &mut ModelContext<Project>,
2108    ) -> Task<()> {
2109        let (mut settings_changed_tx, mut settings_changed_rx) = watch::channel();
2110        let _ = postage::stream::Stream::try_recv(&mut settings_changed_rx);
2111
2112        let settings_observation = cx.observe_global::<Settings, _>(move |_, _| {
2113            *settings_changed_tx.borrow_mut() = ();
2114        });
2115        cx.spawn_weak(|this, mut cx| async move {
2116            while let Some(_) = settings_changed_rx.next().await {
2117                let workspace_config = cx.update(|cx| languages.workspace_configuration(cx)).await;
2118                if let Some(this) = this.upgrade(&cx) {
2119                    this.read_with(&cx, |this, _| {
2120                        for server_state in this.language_servers.values() {
2121                            if let LanguageServerState::Running { server, .. } = server_state {
2122                                server
2123                                    .notify::<lsp::notification::DidChangeConfiguration>(
2124                                        lsp::DidChangeConfigurationParams {
2125                                            settings: workspace_config.clone(),
2126                                        },
2127                                    )
2128                                    .ok();
2129                            }
2130                        }
2131                    })
2132                } else {
2133                    break;
2134                }
2135            }
2136
2137            drop(settings_observation);
2138        })
2139    }
2140
2141    fn detect_language_for_buffer(
2142        &mut self,
2143        buffer_handle: &ModelHandle<Buffer>,
2144        cx: &mut ModelContext<Self>,
2145    ) -> Option<()> {
2146        // If the buffer has a language, set it and start the language server if we haven't already.
2147        let buffer = buffer_handle.read(cx);
2148        let full_path = buffer.file()?.full_path(cx);
2149        let content = buffer.as_rope();
2150        let new_language = self
2151            .languages
2152            .language_for_file(&full_path, Some(content))
2153            .now_or_never()?
2154            .ok()?;
2155        self.set_language_for_buffer(buffer_handle, new_language, cx);
2156        None
2157    }
2158
2159    pub fn set_language_for_buffer(
2160        &mut self,
2161        buffer: &ModelHandle<Buffer>,
2162        new_language: Arc<Language>,
2163        cx: &mut ModelContext<Self>,
2164    ) {
2165        buffer.update(cx, |buffer, cx| {
2166            if buffer.language().map_or(true, |old_language| {
2167                !Arc::ptr_eq(old_language, &new_language)
2168            }) {
2169                buffer.set_language(Some(new_language.clone()), cx);
2170            }
2171        });
2172
2173        if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
2174            if let Some(worktree) = file.worktree.read(cx).as_local() {
2175                let worktree_id = worktree.id();
2176                let worktree_abs_path = worktree.abs_path().clone();
2177                self.start_language_servers(worktree_id, worktree_abs_path, new_language, cx);
2178            }
2179        }
2180    }
2181
2182    fn start_language_servers(
2183        &mut self,
2184        worktree_id: WorktreeId,
2185        worktree_path: Arc<Path>,
2186        language: Arc<Language>,
2187        cx: &mut ModelContext<Self>,
2188    ) {
2189        if !cx
2190            .global::<Settings>()
2191            .enable_language_server(Some(&language.name()))
2192        {
2193            return;
2194        }
2195
2196        for adapter in language.lsp_adapters() {
2197            let key = (worktree_id, adapter.name.clone());
2198            if self.language_server_ids.contains_key(&key) {
2199                continue;
2200            }
2201
2202            let pending_server = match self.languages.start_language_server(
2203                language.clone(),
2204                adapter.clone(),
2205                worktree_path.clone(),
2206                self.client.http_client(),
2207                cx,
2208            ) {
2209                Some(pending_server) => pending_server,
2210                None => continue,
2211            };
2212
2213            let lsp = &cx.global::<Settings>().lsp.get(&adapter.name.0);
2214            let override_options = lsp.map(|s| s.initialization_options.clone()).flatten();
2215
2216            let mut initialization_options = adapter.initialization_options.clone();
2217            match (&mut initialization_options, override_options) {
2218                (Some(initialization_options), Some(override_options)) => {
2219                    merge_json_value_into(override_options, initialization_options);
2220                }
2221                (None, override_options) => initialization_options = override_options,
2222                _ => {}
2223            }
2224
2225            let server_id = pending_server.server_id;
2226            let state = self.setup_pending_language_server(
2227                initialization_options,
2228                pending_server,
2229                adapter.clone(),
2230                language.clone(),
2231                key.clone(),
2232                cx,
2233            );
2234            self.language_servers.insert(server_id, state);
2235            self.language_server_ids.insert(key.clone(), server_id);
2236        }
2237    }
2238
2239    fn setup_pending_language_server(
2240        &mut self,
2241        initialization_options: Option<serde_json::Value>,
2242        pending_server: PendingLanguageServer,
2243        adapter: Arc<CachedLspAdapter>,
2244        language: Arc<Language>,
2245        key: (WorktreeId, LanguageServerName),
2246        cx: &mut ModelContext<Project>,
2247    ) -> LanguageServerState {
2248        let server_id = pending_server.server_id;
2249        let languages = self.languages.clone();
2250
2251        LanguageServerState::Starting(cx.spawn_weak(|this, mut cx| async move {
2252            let workspace_config = cx.update(|cx| languages.workspace_configuration(cx)).await;
2253            let language_server = pending_server.task.await.log_err()?;
2254            let language_server = language_server
2255                .initialize(initialization_options)
2256                .await
2257                .log_err()?;
2258            let this = this.upgrade(&cx)?;
2259
2260            language_server
2261                .on_notification::<lsp::notification::PublishDiagnostics, _>({
2262                    let this = this.downgrade();
2263                    let adapter = adapter.clone();
2264                    move |mut params, cx| {
2265                        let this = this;
2266                        let adapter = adapter.clone();
2267                        cx.spawn(|mut cx| async move {
2268                            adapter.process_diagnostics(&mut params).await;
2269                            if let Some(this) = this.upgrade(&cx) {
2270                                this.update(&mut cx, |this, cx| {
2271                                    this.update_diagnostics(
2272                                        server_id,
2273                                        params,
2274                                        &adapter.disk_based_diagnostic_sources,
2275                                        cx,
2276                                    )
2277                                    .log_err();
2278                                });
2279                            }
2280                        })
2281                        .detach();
2282                    }
2283                })
2284                .detach();
2285
2286            language_server
2287                .on_request::<lsp::request::WorkspaceConfiguration, _, _>({
2288                    let languages = languages.clone();
2289                    move |params, mut cx| {
2290                        let languages = languages.clone();
2291                        async move {
2292                            let workspace_config =
2293                                cx.update(|cx| languages.workspace_configuration(cx)).await;
2294                            Ok(params
2295                                .items
2296                                .into_iter()
2297                                .map(|item| {
2298                                    if let Some(section) = &item.section {
2299                                        workspace_config
2300                                            .get(section)
2301                                            .cloned()
2302                                            .unwrap_or(serde_json::Value::Null)
2303                                    } else {
2304                                        workspace_config.clone()
2305                                    }
2306                                })
2307                                .collect())
2308                        }
2309                    }
2310                })
2311                .detach();
2312
2313            // Even though we don't have handling for these requests, respond to them to
2314            // avoid stalling any language server like `gopls` which waits for a response
2315            // to these requests when initializing.
2316            language_server
2317                .on_request::<lsp::request::WorkDoneProgressCreate, _, _>({
2318                    let this = this.downgrade();
2319                    move |params, mut cx| async move {
2320                        if let Some(this) = this.upgrade(&cx) {
2321                            this.update(&mut cx, |this, _| {
2322                                if let Some(status) =
2323                                    this.language_server_statuses.get_mut(&server_id)
2324                                {
2325                                    if let lsp::NumberOrString::String(token) = params.token {
2326                                        status.progress_tokens.insert(token);
2327                                    }
2328                                }
2329                            });
2330                        }
2331                        Ok(())
2332                    }
2333                })
2334                .detach();
2335            language_server
2336                .on_request::<lsp::request::RegisterCapability, _, _>({
2337                    let this = this.downgrade();
2338                    move |params, mut cx| async move {
2339                        let this = this
2340                            .upgrade(&cx)
2341                            .ok_or_else(|| anyhow!("project dropped"))?;
2342                        for reg in params.registrations {
2343                            if reg.method == "workspace/didChangeWatchedFiles" {
2344                                if let Some(options) = reg.register_options {
2345                                    let options = serde_json::from_value(options)?;
2346                                    this.update(&mut cx, |this, cx| {
2347                                        this.on_lsp_did_change_watched_files(
2348                                            server_id, options, cx,
2349                                        );
2350                                    });
2351                                }
2352                            }
2353                        }
2354                        Ok(())
2355                    }
2356                })
2357                .detach();
2358
2359            language_server
2360                .on_request::<lsp::request::ApplyWorkspaceEdit, _, _>({
2361                    let this = this.downgrade();
2362                    let adapter = adapter.clone();
2363                    let language_server = language_server.clone();
2364                    move |params, cx| {
2365                        Self::on_lsp_workspace_edit(
2366                            this,
2367                            params,
2368                            server_id,
2369                            adapter.clone(),
2370                            language_server.clone(),
2371                            cx,
2372                        )
2373                    }
2374                })
2375                .detach();
2376
2377            let disk_based_diagnostics_progress_token =
2378                adapter.disk_based_diagnostics_progress_token.clone();
2379
2380            language_server
2381                .on_notification::<lsp::notification::Progress, _>({
2382                    let this = this.downgrade();
2383                    move |params, mut cx| {
2384                        if let Some(this) = this.upgrade(&cx) {
2385                            this.update(&mut cx, |this, cx| {
2386                                this.on_lsp_progress(
2387                                    params,
2388                                    server_id,
2389                                    disk_based_diagnostics_progress_token.clone(),
2390                                    cx,
2391                                );
2392                            });
2393                        }
2394                    }
2395                })
2396                .detach();
2397
2398            language_server
2399                .notify::<lsp::notification::DidChangeConfiguration>(
2400                    lsp::DidChangeConfigurationParams {
2401                        settings: workspace_config,
2402                    },
2403                )
2404                .ok();
2405
2406            this.update(&mut cx, |this, cx| {
2407                // If the language server for this key doesn't match the server id, don't store the
2408                // server. Which will cause it to be dropped, killing the process
2409                if this
2410                    .language_server_ids
2411                    .get(&key)
2412                    .map(|id| id != &server_id)
2413                    .unwrap_or(false)
2414                {
2415                    return None;
2416                }
2417
2418                // Update language_servers collection with Running variant of LanguageServerState
2419                // indicating that the server is up and running and ready
2420                this.language_servers.insert(
2421                    server_id,
2422                    LanguageServerState::Running {
2423                        adapter: adapter.clone(),
2424                        language: language.clone(),
2425                        watched_paths: Default::default(),
2426                        server: language_server.clone(),
2427                        simulate_disk_based_diagnostics_completion: None,
2428                    },
2429                );
2430                this.language_server_statuses.insert(
2431                    server_id,
2432                    LanguageServerStatus {
2433                        name: language_server.name().to_string(),
2434                        pending_work: Default::default(),
2435                        has_pending_diagnostic_updates: false,
2436                        progress_tokens: Default::default(),
2437                    },
2438                );
2439
2440                if let Some(project_id) = this.remote_id() {
2441                    this.client
2442                        .send(proto::StartLanguageServer {
2443                            project_id,
2444                            server: Some(proto::LanguageServer {
2445                                id: server_id.0 as u64,
2446                                name: language_server.name().to_string(),
2447                            }),
2448                        })
2449                        .log_err();
2450                }
2451
2452                // Tell the language server about every open buffer in the worktree that matches the language.
2453                for buffer in this.opened_buffers.values() {
2454                    if let Some(buffer_handle) = buffer.upgrade(cx) {
2455                        let buffer = buffer_handle.read(cx);
2456                        let file = match File::from_dyn(buffer.file()) {
2457                            Some(file) => file,
2458                            None => continue,
2459                        };
2460                        let language = match buffer.language() {
2461                            Some(language) => language,
2462                            None => continue,
2463                        };
2464
2465                        if file.worktree.read(cx).id() != key.0
2466                            || !language.lsp_adapters().iter().any(|a| a.name == key.1)
2467                        {
2468                            continue;
2469                        }
2470
2471                        let file = file.as_local()?;
2472                        let versions = this
2473                            .buffer_snapshots
2474                            .entry(buffer.remote_id())
2475                            .or_default()
2476                            .entry(server_id)
2477                            .or_insert_with(|| {
2478                                vec![LspBufferSnapshot {
2479                                    version: 0,
2480                                    snapshot: buffer.text_snapshot(),
2481                                }]
2482                            });
2483
2484                        let snapshot = versions.last().unwrap();
2485                        let version = snapshot.version;
2486                        let initial_snapshot = &snapshot.snapshot;
2487                        let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
2488                        language_server
2489                            .notify::<lsp::notification::DidOpenTextDocument>(
2490                                lsp::DidOpenTextDocumentParams {
2491                                    text_document: lsp::TextDocumentItem::new(
2492                                        uri,
2493                                        adapter
2494                                            .language_ids
2495                                            .get(language.name().as_ref())
2496                                            .cloned()
2497                                            .unwrap_or_default(),
2498                                        version,
2499                                        initial_snapshot.text(),
2500                                    ),
2501                                },
2502                            )
2503                            .log_err()?;
2504                        buffer_handle.update(cx, |buffer, cx| {
2505                            buffer.set_completion_triggers(
2506                                language_server
2507                                    .capabilities()
2508                                    .completion_provider
2509                                    .as_ref()
2510                                    .and_then(|provider| provider.trigger_characters.clone())
2511                                    .unwrap_or_default(),
2512                                cx,
2513                            )
2514                        });
2515                    }
2516                }
2517
2518                cx.notify();
2519                Some(language_server)
2520            })
2521        }))
2522    }
2523
2524    // Returns a list of all of the worktrees which no longer have a language server and the root path
2525    // for the stopped server
2526    fn stop_language_server(
2527        &mut self,
2528        worktree_id: WorktreeId,
2529        adapter_name: LanguageServerName,
2530        cx: &mut ModelContext<Self>,
2531    ) -> Task<(Option<PathBuf>, Vec<WorktreeId>)> {
2532        let key = (worktree_id, adapter_name);
2533        if let Some(server_id) = self.language_server_ids.remove(&key) {
2534            // Remove other entries for this language server as well
2535            let mut orphaned_worktrees = vec![worktree_id];
2536            let other_keys = self.language_server_ids.keys().cloned().collect::<Vec<_>>();
2537            for other_key in other_keys {
2538                if self.language_server_ids.get(&other_key) == Some(&server_id) {
2539                    self.language_server_ids.remove(&other_key);
2540                    orphaned_worktrees.push(other_key.0);
2541                }
2542            }
2543
2544            self.language_server_statuses.remove(&server_id);
2545            cx.notify();
2546
2547            let server_state = self.language_servers.remove(&server_id);
2548            cx.spawn_weak(|this, mut cx| async move {
2549                let mut root_path = None;
2550
2551                let server = match server_state {
2552                    Some(LanguageServerState::Starting(started_language_server)) => {
2553                        started_language_server.await
2554                    }
2555                    Some(LanguageServerState::Running { server, .. }) => Some(server),
2556                    None => None,
2557                };
2558
2559                if let Some(server) = server {
2560                    root_path = Some(server.root_path().clone());
2561                    if let Some(shutdown) = server.shutdown() {
2562                        shutdown.await;
2563                    }
2564                }
2565
2566                if let Some(this) = this.upgrade(&cx) {
2567                    this.update(&mut cx, |this, cx| {
2568                        this.language_server_statuses.remove(&server_id);
2569                        cx.notify();
2570                    });
2571                }
2572
2573                (root_path, orphaned_worktrees)
2574            })
2575        } else {
2576            Task::ready((None, Vec::new()))
2577        }
2578    }
2579
2580    pub fn restart_language_servers_for_buffers(
2581        &mut self,
2582        buffers: impl IntoIterator<Item = ModelHandle<Buffer>>,
2583        cx: &mut ModelContext<Self>,
2584    ) -> Option<()> {
2585        let language_server_lookup_info: HashSet<(WorktreeId, Arc<Path>, Arc<Language>)> = buffers
2586            .into_iter()
2587            .filter_map(|buffer| {
2588                let buffer = buffer.read(cx);
2589                let file = File::from_dyn(buffer.file())?;
2590                let worktree = file.worktree.read(cx).as_local()?;
2591                let full_path = file.full_path(cx);
2592                let language = self
2593                    .languages
2594                    .language_for_file(&full_path, Some(buffer.as_rope()))
2595                    .now_or_never()?
2596                    .ok()?;
2597                Some((worktree.id(), worktree.abs_path().clone(), language))
2598            })
2599            .collect();
2600        for (worktree_id, worktree_abs_path, language) in language_server_lookup_info {
2601            self.restart_language_servers(worktree_id, worktree_abs_path, language, cx);
2602        }
2603
2604        None
2605    }
2606
2607    // TODO This will break in the case where the adapter's root paths and worktrees are not equal
2608    fn restart_language_servers(
2609        &mut self,
2610        worktree_id: WorktreeId,
2611        fallback_path: Arc<Path>,
2612        language: Arc<Language>,
2613        cx: &mut ModelContext<Self>,
2614    ) {
2615        let mut stops = Vec::new();
2616        for adapter in language.lsp_adapters() {
2617            stops.push(self.stop_language_server(worktree_id, adapter.name.clone(), cx));
2618        }
2619
2620        if stops.is_empty() {
2621            return;
2622        }
2623        let mut stops = stops.into_iter();
2624
2625        cx.spawn_weak(|this, mut cx| async move {
2626            let (original_root_path, mut orphaned_worktrees) = stops.next().unwrap().await;
2627            for stop in stops {
2628                let (_, worktrees) = stop.await;
2629                orphaned_worktrees.extend_from_slice(&worktrees);
2630            }
2631
2632            let this = match this.upgrade(&cx) {
2633                Some(this) => this,
2634                None => return,
2635            };
2636
2637            this.update(&mut cx, |this, cx| {
2638                // Attempt to restart using original server path. Fallback to passed in
2639                // path if we could not retrieve the root path
2640                let root_path = original_root_path
2641                    .map(|path_buf| Arc::from(path_buf.as_path()))
2642                    .unwrap_or(fallback_path);
2643
2644                this.start_language_servers(worktree_id, root_path, language.clone(), cx);
2645
2646                // Lookup new server ids and set them for each of the orphaned worktrees
2647                for adapter in language.lsp_adapters() {
2648                    if let Some(new_server_id) = this
2649                        .language_server_ids
2650                        .get(&(worktree_id, adapter.name.clone()))
2651                        .cloned()
2652                    {
2653                        for &orphaned_worktree in &orphaned_worktrees {
2654                            this.language_server_ids
2655                                .insert((orphaned_worktree, adapter.name.clone()), new_server_id);
2656                        }
2657                    }
2658                }
2659            });
2660        })
2661        .detach();
2662    }
2663
2664    fn on_lsp_progress(
2665        &mut self,
2666        progress: lsp::ProgressParams,
2667        language_server_id: LanguageServerId,
2668        disk_based_diagnostics_progress_token: Option<String>,
2669        cx: &mut ModelContext<Self>,
2670    ) {
2671        let token = match progress.token {
2672            lsp::NumberOrString::String(token) => token,
2673            lsp::NumberOrString::Number(token) => {
2674                log::info!("skipping numeric progress token {}", token);
2675                return;
2676            }
2677        };
2678        let lsp::ProgressParamsValue::WorkDone(progress) = progress.value;
2679        let language_server_status =
2680            if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2681                status
2682            } else {
2683                return;
2684            };
2685
2686        if !language_server_status.progress_tokens.contains(&token) {
2687            return;
2688        }
2689
2690        let is_disk_based_diagnostics_progress = disk_based_diagnostics_progress_token
2691            .as_ref()
2692            .map_or(false, |disk_based_token| {
2693                token.starts_with(disk_based_token)
2694            });
2695
2696        match progress {
2697            lsp::WorkDoneProgress::Begin(report) => {
2698                if is_disk_based_diagnostics_progress {
2699                    language_server_status.has_pending_diagnostic_updates = true;
2700                    self.disk_based_diagnostics_started(language_server_id, cx);
2701                    self.buffer_ordered_messages_tx
2702                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
2703                            language_server_id,
2704                            message: proto::update_language_server::Variant::DiskBasedDiagnosticsUpdating(Default::default())
2705                        })
2706                        .ok();
2707                } else {
2708                    self.on_lsp_work_start(
2709                        language_server_id,
2710                        token.clone(),
2711                        LanguageServerProgress {
2712                            message: report.message.clone(),
2713                            percentage: report.percentage.map(|p| p as usize),
2714                            last_update_at: Instant::now(),
2715                        },
2716                        cx,
2717                    );
2718                    self.buffer_ordered_messages_tx
2719                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
2720                            language_server_id,
2721                            message: proto::update_language_server::Variant::WorkStart(
2722                                proto::LspWorkStart {
2723                                    token,
2724                                    message: report.message,
2725                                    percentage: report.percentage.map(|p| p as u32),
2726                                },
2727                            ),
2728                        })
2729                        .ok();
2730                }
2731            }
2732            lsp::WorkDoneProgress::Report(report) => {
2733                if !is_disk_based_diagnostics_progress {
2734                    self.on_lsp_work_progress(
2735                        language_server_id,
2736                        token.clone(),
2737                        LanguageServerProgress {
2738                            message: report.message.clone(),
2739                            percentage: report.percentage.map(|p| p as usize),
2740                            last_update_at: Instant::now(),
2741                        },
2742                        cx,
2743                    );
2744                    self.buffer_ordered_messages_tx
2745                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
2746                            language_server_id,
2747                            message: proto::update_language_server::Variant::WorkProgress(
2748                                proto::LspWorkProgress {
2749                                    token,
2750                                    message: report.message,
2751                                    percentage: report.percentage.map(|p| p as u32),
2752                                },
2753                            ),
2754                        })
2755                        .ok();
2756                }
2757            }
2758            lsp::WorkDoneProgress::End(_) => {
2759                language_server_status.progress_tokens.remove(&token);
2760
2761                if is_disk_based_diagnostics_progress {
2762                    language_server_status.has_pending_diagnostic_updates = false;
2763                    self.disk_based_diagnostics_finished(language_server_id, cx);
2764                    self.buffer_ordered_messages_tx
2765                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
2766                            language_server_id,
2767                            message:
2768                                proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(
2769                                    Default::default(),
2770                                ),
2771                        })
2772                        .ok();
2773                } else {
2774                    self.on_lsp_work_end(language_server_id, token.clone(), cx);
2775                    self.buffer_ordered_messages_tx
2776                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
2777                            language_server_id,
2778                            message: proto::update_language_server::Variant::WorkEnd(
2779                                proto::LspWorkEnd { token },
2780                            ),
2781                        })
2782                        .ok();
2783                }
2784            }
2785        }
2786    }
2787
2788    fn on_lsp_work_start(
2789        &mut self,
2790        language_server_id: LanguageServerId,
2791        token: String,
2792        progress: LanguageServerProgress,
2793        cx: &mut ModelContext<Self>,
2794    ) {
2795        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2796            status.pending_work.insert(token, progress);
2797            cx.notify();
2798        }
2799    }
2800
2801    fn on_lsp_work_progress(
2802        &mut self,
2803        language_server_id: LanguageServerId,
2804        token: String,
2805        progress: LanguageServerProgress,
2806        cx: &mut ModelContext<Self>,
2807    ) {
2808        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2809            let entry = status
2810                .pending_work
2811                .entry(token)
2812                .or_insert(LanguageServerProgress {
2813                    message: Default::default(),
2814                    percentage: Default::default(),
2815                    last_update_at: progress.last_update_at,
2816                });
2817            if progress.message.is_some() {
2818                entry.message = progress.message;
2819            }
2820            if progress.percentage.is_some() {
2821                entry.percentage = progress.percentage;
2822            }
2823            entry.last_update_at = progress.last_update_at;
2824            cx.notify();
2825        }
2826    }
2827
2828    fn on_lsp_work_end(
2829        &mut self,
2830        language_server_id: LanguageServerId,
2831        token: String,
2832        cx: &mut ModelContext<Self>,
2833    ) {
2834        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2835            status.pending_work.remove(&token);
2836            cx.notify();
2837        }
2838    }
2839
2840    fn on_lsp_did_change_watched_files(
2841        &mut self,
2842        language_server_id: LanguageServerId,
2843        params: DidChangeWatchedFilesRegistrationOptions,
2844        cx: &mut ModelContext<Self>,
2845    ) {
2846        if let Some(LanguageServerState::Running { watched_paths, .. }) =
2847            self.language_servers.get_mut(&language_server_id)
2848        {
2849            watched_paths.clear();
2850            for watcher in params.watchers {
2851                watched_paths.add_pattern(&watcher.glob_pattern).log_err();
2852            }
2853            cx.notify();
2854        }
2855    }
2856
2857    async fn on_lsp_workspace_edit(
2858        this: WeakModelHandle<Self>,
2859        params: lsp::ApplyWorkspaceEditParams,
2860        server_id: LanguageServerId,
2861        adapter: Arc<CachedLspAdapter>,
2862        language_server: Arc<LanguageServer>,
2863        mut cx: AsyncAppContext,
2864    ) -> Result<lsp::ApplyWorkspaceEditResponse> {
2865        let this = this
2866            .upgrade(&cx)
2867            .ok_or_else(|| anyhow!("project project closed"))?;
2868        let transaction = Self::deserialize_workspace_edit(
2869            this.clone(),
2870            params.edit,
2871            true,
2872            adapter.clone(),
2873            language_server.clone(),
2874            &mut cx,
2875        )
2876        .await
2877        .log_err();
2878        this.update(&mut cx, |this, _| {
2879            if let Some(transaction) = transaction {
2880                this.last_workspace_edits_by_language_server
2881                    .insert(server_id, transaction);
2882            }
2883        });
2884        Ok(lsp::ApplyWorkspaceEditResponse {
2885            applied: true,
2886            failed_change: None,
2887            failure_reason: None,
2888        })
2889    }
2890
2891    pub fn language_server_statuses(
2892        &self,
2893    ) -> impl DoubleEndedIterator<Item = &LanguageServerStatus> {
2894        self.language_server_statuses.values()
2895    }
2896
2897    pub fn update_diagnostics(
2898        &mut self,
2899        language_server_id: LanguageServerId,
2900        mut params: lsp::PublishDiagnosticsParams,
2901        disk_based_sources: &[String],
2902        cx: &mut ModelContext<Self>,
2903    ) -> Result<()> {
2904        let abs_path = params
2905            .uri
2906            .to_file_path()
2907            .map_err(|_| anyhow!("URI is not a file"))?;
2908        let mut diagnostics = Vec::default();
2909        let mut primary_diagnostic_group_ids = HashMap::default();
2910        let mut sources_by_group_id = HashMap::default();
2911        let mut supporting_diagnostics = HashMap::default();
2912
2913        // Ensure that primary diagnostics are always the most severe
2914        params.diagnostics.sort_by_key(|item| item.severity);
2915
2916        for diagnostic in &params.diagnostics {
2917            let source = diagnostic.source.as_ref();
2918            let code = diagnostic.code.as_ref().map(|code| match code {
2919                lsp::NumberOrString::Number(code) => code.to_string(),
2920                lsp::NumberOrString::String(code) => code.clone(),
2921            });
2922            let range = range_from_lsp(diagnostic.range);
2923            let is_supporting = diagnostic
2924                .related_information
2925                .as_ref()
2926                .map_or(false, |infos| {
2927                    infos.iter().any(|info| {
2928                        primary_diagnostic_group_ids.contains_key(&(
2929                            source,
2930                            code.clone(),
2931                            range_from_lsp(info.location.range),
2932                        ))
2933                    })
2934                });
2935
2936            let is_unnecessary = diagnostic.tags.as_ref().map_or(false, |tags| {
2937                tags.iter().any(|tag| *tag == DiagnosticTag::UNNECESSARY)
2938            });
2939
2940            if is_supporting {
2941                supporting_diagnostics.insert(
2942                    (source, code.clone(), range),
2943                    (diagnostic.severity, is_unnecessary),
2944                );
2945            } else {
2946                let group_id = post_inc(&mut self.next_diagnostic_group_id);
2947                let is_disk_based =
2948                    source.map_or(false, |source| disk_based_sources.contains(source));
2949
2950                sources_by_group_id.insert(group_id, source);
2951                primary_diagnostic_group_ids
2952                    .insert((source, code.clone(), range.clone()), group_id);
2953
2954                diagnostics.push(DiagnosticEntry {
2955                    range,
2956                    diagnostic: Diagnostic {
2957                        code: code.clone(),
2958                        severity: diagnostic.severity.unwrap_or(DiagnosticSeverity::ERROR),
2959                        message: diagnostic.message.clone(),
2960                        group_id,
2961                        is_primary: true,
2962                        is_valid: true,
2963                        is_disk_based,
2964                        is_unnecessary,
2965                    },
2966                });
2967                if let Some(infos) = &diagnostic.related_information {
2968                    for info in infos {
2969                        if info.location.uri == params.uri && !info.message.is_empty() {
2970                            let range = range_from_lsp(info.location.range);
2971                            diagnostics.push(DiagnosticEntry {
2972                                range,
2973                                diagnostic: Diagnostic {
2974                                    code: code.clone(),
2975                                    severity: DiagnosticSeverity::INFORMATION,
2976                                    message: info.message.clone(),
2977                                    group_id,
2978                                    is_primary: false,
2979                                    is_valid: true,
2980                                    is_disk_based,
2981                                    is_unnecessary: false,
2982                                },
2983                            });
2984                        }
2985                    }
2986                }
2987            }
2988        }
2989
2990        for entry in &mut diagnostics {
2991            let diagnostic = &mut entry.diagnostic;
2992            if !diagnostic.is_primary {
2993                let source = *sources_by_group_id.get(&diagnostic.group_id).unwrap();
2994                if let Some(&(severity, is_unnecessary)) = supporting_diagnostics.get(&(
2995                    source,
2996                    diagnostic.code.clone(),
2997                    entry.range.clone(),
2998                )) {
2999                    if let Some(severity) = severity {
3000                        diagnostic.severity = severity;
3001                    }
3002                    diagnostic.is_unnecessary = is_unnecessary;
3003                }
3004            }
3005        }
3006
3007        self.update_diagnostic_entries(
3008            language_server_id,
3009            abs_path,
3010            params.version,
3011            diagnostics,
3012            cx,
3013        )?;
3014        Ok(())
3015    }
3016
3017    pub fn update_diagnostic_entries(
3018        &mut self,
3019        server_id: LanguageServerId,
3020        abs_path: PathBuf,
3021        version: Option<i32>,
3022        diagnostics: Vec<DiagnosticEntry<Unclipped<PointUtf16>>>,
3023        cx: &mut ModelContext<Project>,
3024    ) -> Result<(), anyhow::Error> {
3025        let (worktree, relative_path) = self
3026            .find_local_worktree(&abs_path, cx)
3027            .ok_or_else(|| anyhow!("no worktree found for diagnostics"))?;
3028
3029        let project_path = ProjectPath {
3030            worktree_id: worktree.read(cx).id(),
3031            path: relative_path.into(),
3032        };
3033
3034        if let Some(buffer) = self.get_open_buffer(&project_path, cx) {
3035            self.update_buffer_diagnostics(&buffer, server_id, version, diagnostics.clone(), cx)?;
3036        }
3037
3038        let updated = worktree.update(cx, |worktree, cx| {
3039            worktree
3040                .as_local_mut()
3041                .ok_or_else(|| anyhow!("not a local worktree"))?
3042                .update_diagnostics(server_id, project_path.path.clone(), diagnostics, cx)
3043        })?;
3044        if updated {
3045            cx.emit(Event::DiagnosticsUpdated {
3046                language_server_id: server_id,
3047                path: project_path,
3048            });
3049        }
3050        Ok(())
3051    }
3052
3053    fn update_buffer_diagnostics(
3054        &mut self,
3055        buffer: &ModelHandle<Buffer>,
3056        server_id: LanguageServerId,
3057        version: Option<i32>,
3058        mut diagnostics: Vec<DiagnosticEntry<Unclipped<PointUtf16>>>,
3059        cx: &mut ModelContext<Self>,
3060    ) -> Result<()> {
3061        fn compare_diagnostics(a: &Diagnostic, b: &Diagnostic) -> Ordering {
3062            Ordering::Equal
3063                .then_with(|| b.is_primary.cmp(&a.is_primary))
3064                .then_with(|| a.is_disk_based.cmp(&b.is_disk_based))
3065                .then_with(|| a.severity.cmp(&b.severity))
3066                .then_with(|| a.message.cmp(&b.message))
3067        }
3068
3069        let snapshot = self.buffer_snapshot_for_lsp_version(buffer, server_id, version, cx)?;
3070
3071        diagnostics.sort_unstable_by(|a, b| {
3072            Ordering::Equal
3073                .then_with(|| a.range.start.cmp(&b.range.start))
3074                .then_with(|| b.range.end.cmp(&a.range.end))
3075                .then_with(|| compare_diagnostics(&a.diagnostic, &b.diagnostic))
3076        });
3077
3078        let mut sanitized_diagnostics = Vec::new();
3079        let edits_since_save = Patch::new(
3080            snapshot
3081                .edits_since::<Unclipped<PointUtf16>>(buffer.read(cx).saved_version())
3082                .collect(),
3083        );
3084        for entry in diagnostics {
3085            let start;
3086            let end;
3087            if entry.diagnostic.is_disk_based {
3088                // Some diagnostics are based on files on disk instead of buffers'
3089                // current contents. Adjust these diagnostics' ranges to reflect
3090                // any unsaved edits.
3091                start = edits_since_save.old_to_new(entry.range.start);
3092                end = edits_since_save.old_to_new(entry.range.end);
3093            } else {
3094                start = entry.range.start;
3095                end = entry.range.end;
3096            }
3097
3098            let mut range = snapshot.clip_point_utf16(start, Bias::Left)
3099                ..snapshot.clip_point_utf16(end, Bias::Right);
3100
3101            // Expand empty ranges by one codepoint
3102            if range.start == range.end {
3103                // This will be go to the next boundary when being clipped
3104                range.end.column += 1;
3105                range.end = snapshot.clip_point_utf16(Unclipped(range.end), Bias::Right);
3106                if range.start == range.end && range.end.column > 0 {
3107                    range.start.column -= 1;
3108                    range.end = snapshot.clip_point_utf16(Unclipped(range.end), Bias::Left);
3109                }
3110            }
3111
3112            sanitized_diagnostics.push(DiagnosticEntry {
3113                range,
3114                diagnostic: entry.diagnostic,
3115            });
3116        }
3117        drop(edits_since_save);
3118
3119        let set = DiagnosticSet::new(sanitized_diagnostics, &snapshot);
3120        buffer.update(cx, |buffer, cx| {
3121            buffer.update_diagnostics(server_id, set, cx)
3122        });
3123        Ok(())
3124    }
3125
3126    pub fn reload_buffers(
3127        &self,
3128        buffers: HashSet<ModelHandle<Buffer>>,
3129        push_to_history: bool,
3130        cx: &mut ModelContext<Self>,
3131    ) -> Task<Result<ProjectTransaction>> {
3132        let mut local_buffers = Vec::new();
3133        let mut remote_buffers = None;
3134        for buffer_handle in buffers {
3135            let buffer = buffer_handle.read(cx);
3136            if buffer.is_dirty() {
3137                if let Some(file) = File::from_dyn(buffer.file()) {
3138                    if file.is_local() {
3139                        local_buffers.push(buffer_handle);
3140                    } else {
3141                        remote_buffers.get_or_insert(Vec::new()).push(buffer_handle);
3142                    }
3143                }
3144            }
3145        }
3146
3147        let remote_buffers = self.remote_id().zip(remote_buffers);
3148        let client = self.client.clone();
3149
3150        cx.spawn(|this, mut cx| async move {
3151            let mut project_transaction = ProjectTransaction::default();
3152
3153            if let Some((project_id, remote_buffers)) = remote_buffers {
3154                let response = client
3155                    .request(proto::ReloadBuffers {
3156                        project_id,
3157                        buffer_ids: remote_buffers
3158                            .iter()
3159                            .map(|buffer| buffer.read_with(&cx, |buffer, _| buffer.remote_id()))
3160                            .collect(),
3161                    })
3162                    .await?
3163                    .transaction
3164                    .ok_or_else(|| anyhow!("missing transaction"))?;
3165                project_transaction = this
3166                    .update(&mut cx, |this, cx| {
3167                        this.deserialize_project_transaction(response, push_to_history, cx)
3168                    })
3169                    .await?;
3170            }
3171
3172            for buffer in local_buffers {
3173                let transaction = buffer
3174                    .update(&mut cx, |buffer, cx| buffer.reload(cx))
3175                    .await?;
3176                buffer.update(&mut cx, |buffer, cx| {
3177                    if let Some(transaction) = transaction {
3178                        if !push_to_history {
3179                            buffer.forget_transaction(transaction.id);
3180                        }
3181                        project_transaction.0.insert(cx.handle(), transaction);
3182                    }
3183                });
3184            }
3185
3186            Ok(project_transaction)
3187        })
3188    }
3189
3190    pub fn format(
3191        &self,
3192        buffers: HashSet<ModelHandle<Buffer>>,
3193        push_to_history: bool,
3194        trigger: FormatTrigger,
3195        cx: &mut ModelContext<Project>,
3196    ) -> Task<Result<ProjectTransaction>> {
3197        if self.is_local() {
3198            let mut buffers_with_paths_and_servers = buffers
3199                .into_iter()
3200                .filter_map(|buffer_handle| {
3201                    let buffer = buffer_handle.read(cx);
3202                    let file = File::from_dyn(buffer.file())?;
3203                    let buffer_abs_path = file.as_local().map(|f| f.abs_path(cx));
3204                    let server = self
3205                        .primary_language_servers_for_buffer(buffer, cx)
3206                        .map(|s| s.1.clone());
3207                    Some((buffer_handle, buffer_abs_path, server))
3208                })
3209                .collect::<Vec<_>>();
3210
3211            cx.spawn(|this, mut cx| async move {
3212                // Do not allow multiple concurrent formatting requests for the
3213                // same buffer.
3214                this.update(&mut cx, |this, _| {
3215                    buffers_with_paths_and_servers
3216                        .retain(|(buffer, _, _)| this.buffers_being_formatted.insert(buffer.id()));
3217                });
3218
3219                let _cleanup = defer({
3220                    let this = this.clone();
3221                    let mut cx = cx.clone();
3222                    let buffers = &buffers_with_paths_and_servers;
3223                    move || {
3224                        this.update(&mut cx, |this, _| {
3225                            for (buffer, _, _) in buffers {
3226                                this.buffers_being_formatted.remove(&buffer.id());
3227                            }
3228                        });
3229                    }
3230                });
3231
3232                let mut project_transaction = ProjectTransaction::default();
3233                for (buffer, buffer_abs_path, language_server) in &buffers_with_paths_and_servers {
3234                    let (
3235                        format_on_save,
3236                        remove_trailing_whitespace,
3237                        ensure_final_newline,
3238                        formatter,
3239                        tab_size,
3240                    ) = buffer.read_with(&cx, |buffer, cx| {
3241                        let settings = cx.global::<Settings>();
3242                        let language_name = buffer.language().map(|language| language.name());
3243                        (
3244                            settings.format_on_save(language_name.as_deref()),
3245                            settings.remove_trailing_whitespace_on_save(language_name.as_deref()),
3246                            settings.ensure_final_newline_on_save(language_name.as_deref()),
3247                            settings.formatter(language_name.as_deref()),
3248                            settings.tab_size(language_name.as_deref()),
3249                        )
3250                    });
3251
3252                    // First, format buffer's whitespace according to the settings.
3253                    let trailing_whitespace_diff = if remove_trailing_whitespace {
3254                        Some(
3255                            buffer
3256                                .read_with(&cx, |b, cx| b.remove_trailing_whitespace(cx))
3257                                .await,
3258                        )
3259                    } else {
3260                        None
3261                    };
3262                    let whitespace_transaction_id = buffer.update(&mut cx, |buffer, cx| {
3263                        buffer.finalize_last_transaction();
3264                        buffer.start_transaction();
3265                        if let Some(diff) = trailing_whitespace_diff {
3266                            buffer.apply_diff(diff, cx);
3267                        }
3268                        if ensure_final_newline {
3269                            buffer.ensure_final_newline(cx);
3270                        }
3271                        buffer.end_transaction(cx)
3272                    });
3273
3274                    // Currently, formatting operations are represented differently depending on
3275                    // whether they come from a language server or an external command.
3276                    enum FormatOperation {
3277                        Lsp(Vec<(Range<Anchor>, String)>),
3278                        External(Diff),
3279                    }
3280
3281                    // Apply language-specific formatting using either a language server
3282                    // or external command.
3283                    let mut format_operation = None;
3284                    match (formatter, format_on_save) {
3285                        (_, FormatOnSave::Off) if trigger == FormatTrigger::Save => {}
3286
3287                        (Formatter::LanguageServer, FormatOnSave::On | FormatOnSave::Off)
3288                        | (_, FormatOnSave::LanguageServer) => {
3289                            if let Some((language_server, buffer_abs_path)) =
3290                                language_server.as_ref().zip(buffer_abs_path.as_ref())
3291                            {
3292                                format_operation = Some(FormatOperation::Lsp(
3293                                    Self::format_via_lsp(
3294                                        &this,
3295                                        &buffer,
3296                                        buffer_abs_path,
3297                                        &language_server,
3298                                        tab_size,
3299                                        &mut cx,
3300                                    )
3301                                    .await
3302                                    .context("failed to format via language server")?,
3303                                ));
3304                            }
3305                        }
3306
3307                        (
3308                            Formatter::External { command, arguments },
3309                            FormatOnSave::On | FormatOnSave::Off,
3310                        )
3311                        | (_, FormatOnSave::External { command, arguments }) => {
3312                            if let Some(buffer_abs_path) = buffer_abs_path {
3313                                format_operation = Self::format_via_external_command(
3314                                    &buffer,
3315                                    &buffer_abs_path,
3316                                    &command,
3317                                    &arguments,
3318                                    &mut cx,
3319                                )
3320                                .await
3321                                .context(format!(
3322                                    "failed to format via external command {:?}",
3323                                    command
3324                                ))?
3325                                .map(FormatOperation::External);
3326                            }
3327                        }
3328                    };
3329
3330                    buffer.update(&mut cx, |b, cx| {
3331                        // If the buffer had its whitespace formatted and was edited while the language-specific
3332                        // formatting was being computed, avoid applying the language-specific formatting, because
3333                        // it can't be grouped with the whitespace formatting in the undo history.
3334                        if let Some(transaction_id) = whitespace_transaction_id {
3335                            if b.peek_undo_stack()
3336                                .map_or(true, |e| e.transaction_id() != transaction_id)
3337                            {
3338                                format_operation.take();
3339                            }
3340                        }
3341
3342                        // Apply any language-specific formatting, and group the two formatting operations
3343                        // in the buffer's undo history.
3344                        if let Some(operation) = format_operation {
3345                            match operation {
3346                                FormatOperation::Lsp(edits) => {
3347                                    b.edit(edits, None, cx);
3348                                }
3349                                FormatOperation::External(diff) => {
3350                                    b.apply_diff(diff, cx);
3351                                }
3352                            }
3353
3354                            if let Some(transaction_id) = whitespace_transaction_id {
3355                                b.group_until_transaction(transaction_id);
3356                            }
3357                        }
3358
3359                        if let Some(transaction) = b.finalize_last_transaction().cloned() {
3360                            if !push_to_history {
3361                                b.forget_transaction(transaction.id);
3362                            }
3363                            project_transaction.0.insert(buffer.clone(), transaction);
3364                        }
3365                    });
3366                }
3367
3368                Ok(project_transaction)
3369            })
3370        } else {
3371            let remote_id = self.remote_id();
3372            let client = self.client.clone();
3373            cx.spawn(|this, mut cx| async move {
3374                let mut project_transaction = ProjectTransaction::default();
3375                if let Some(project_id) = remote_id {
3376                    let response = client
3377                        .request(proto::FormatBuffers {
3378                            project_id,
3379                            trigger: trigger as i32,
3380                            buffer_ids: buffers
3381                                .iter()
3382                                .map(|buffer| buffer.read_with(&cx, |buffer, _| buffer.remote_id()))
3383                                .collect(),
3384                        })
3385                        .await?
3386                        .transaction
3387                        .ok_or_else(|| anyhow!("missing transaction"))?;
3388                    project_transaction = this
3389                        .update(&mut cx, |this, cx| {
3390                            this.deserialize_project_transaction(response, push_to_history, cx)
3391                        })
3392                        .await?;
3393                }
3394                Ok(project_transaction)
3395            })
3396        }
3397    }
3398
3399    async fn format_via_lsp(
3400        this: &ModelHandle<Self>,
3401        buffer: &ModelHandle<Buffer>,
3402        abs_path: &Path,
3403        language_server: &Arc<LanguageServer>,
3404        tab_size: NonZeroU32,
3405        cx: &mut AsyncAppContext,
3406    ) -> Result<Vec<(Range<Anchor>, String)>> {
3407        let text_document =
3408            lsp::TextDocumentIdentifier::new(lsp::Url::from_file_path(abs_path).unwrap());
3409        let capabilities = &language_server.capabilities();
3410        let lsp_edits = if capabilities
3411            .document_formatting_provider
3412            .as_ref()
3413            .map_or(false, |provider| *provider != lsp::OneOf::Left(false))
3414        {
3415            language_server
3416                .request::<lsp::request::Formatting>(lsp::DocumentFormattingParams {
3417                    text_document,
3418                    options: lsp::FormattingOptions {
3419                        tab_size: tab_size.into(),
3420                        insert_spaces: true,
3421                        insert_final_newline: Some(true),
3422                        ..Default::default()
3423                    },
3424                    work_done_progress_params: Default::default(),
3425                })
3426                .await?
3427        } else if capabilities
3428            .document_range_formatting_provider
3429            .as_ref()
3430            .map_or(false, |provider| *provider != lsp::OneOf::Left(false))
3431        {
3432            let buffer_start = lsp::Position::new(0, 0);
3433            let buffer_end =
3434                buffer.read_with(cx, |buffer, _| point_to_lsp(buffer.max_point_utf16()));
3435            language_server
3436                .request::<lsp::request::RangeFormatting>(lsp::DocumentRangeFormattingParams {
3437                    text_document,
3438                    range: lsp::Range::new(buffer_start, buffer_end),
3439                    options: lsp::FormattingOptions {
3440                        tab_size: tab_size.into(),
3441                        insert_spaces: true,
3442                        insert_final_newline: Some(true),
3443                        ..Default::default()
3444                    },
3445                    work_done_progress_params: Default::default(),
3446                })
3447                .await?
3448        } else {
3449            None
3450        };
3451
3452        if let Some(lsp_edits) = lsp_edits {
3453            this.update(cx, |this, cx| {
3454                this.edits_from_lsp(buffer, lsp_edits, language_server.server_id(), None, cx)
3455            })
3456            .await
3457        } else {
3458            Ok(Default::default())
3459        }
3460    }
3461
3462    async fn format_via_external_command(
3463        buffer: &ModelHandle<Buffer>,
3464        buffer_abs_path: &Path,
3465        command: &str,
3466        arguments: &[String],
3467        cx: &mut AsyncAppContext,
3468    ) -> Result<Option<Diff>> {
3469        let working_dir_path = buffer.read_with(cx, |buffer, cx| {
3470            let file = File::from_dyn(buffer.file())?;
3471            let worktree = file.worktree.read(cx).as_local()?;
3472            let mut worktree_path = worktree.abs_path().to_path_buf();
3473            if worktree.root_entry()?.is_file() {
3474                worktree_path.pop();
3475            }
3476            Some(worktree_path)
3477        });
3478
3479        if let Some(working_dir_path) = working_dir_path {
3480            let mut child =
3481                smol::process::Command::new(command)
3482                    .args(arguments.iter().map(|arg| {
3483                        arg.replace("{buffer_path}", &buffer_abs_path.to_string_lossy())
3484                    }))
3485                    .current_dir(&working_dir_path)
3486                    .stdin(smol::process::Stdio::piped())
3487                    .stdout(smol::process::Stdio::piped())
3488                    .stderr(smol::process::Stdio::piped())
3489                    .spawn()?;
3490            let stdin = child
3491                .stdin
3492                .as_mut()
3493                .ok_or_else(|| anyhow!("failed to acquire stdin"))?;
3494            let text = buffer.read_with(cx, |buffer, _| buffer.as_rope().clone());
3495            for chunk in text.chunks() {
3496                stdin.write_all(chunk.as_bytes()).await?;
3497            }
3498            stdin.flush().await?;
3499
3500            let output = child.output().await?;
3501            if !output.status.success() {
3502                return Err(anyhow!(
3503                    "command failed with exit code {:?}:\nstdout: {}\nstderr: {}",
3504                    output.status.code(),
3505                    String::from_utf8_lossy(&output.stdout),
3506                    String::from_utf8_lossy(&output.stderr),
3507                ));
3508            }
3509
3510            let stdout = String::from_utf8(output.stdout)?;
3511            Ok(Some(
3512                buffer
3513                    .read_with(cx, |buffer, cx| buffer.diff(stdout, cx))
3514                    .await,
3515            ))
3516        } else {
3517            Ok(None)
3518        }
3519    }
3520
3521    pub fn definition<T: ToPointUtf16>(
3522        &self,
3523        buffer: &ModelHandle<Buffer>,
3524        position: T,
3525        cx: &mut ModelContext<Self>,
3526    ) -> Task<Result<Vec<LocationLink>>> {
3527        let position = position.to_point_utf16(buffer.read(cx));
3528        self.request_lsp(buffer.clone(), GetDefinition { position }, cx)
3529    }
3530
3531    pub fn type_definition<T: ToPointUtf16>(
3532        &self,
3533        buffer: &ModelHandle<Buffer>,
3534        position: T,
3535        cx: &mut ModelContext<Self>,
3536    ) -> Task<Result<Vec<LocationLink>>> {
3537        let position = position.to_point_utf16(buffer.read(cx));
3538        self.request_lsp(buffer.clone(), GetTypeDefinition { position }, cx)
3539    }
3540
3541    pub fn references<T: ToPointUtf16>(
3542        &self,
3543        buffer: &ModelHandle<Buffer>,
3544        position: T,
3545        cx: &mut ModelContext<Self>,
3546    ) -> Task<Result<Vec<Location>>> {
3547        let position = position.to_point_utf16(buffer.read(cx));
3548        self.request_lsp(buffer.clone(), GetReferences { position }, cx)
3549    }
3550
3551    pub fn document_highlights<T: ToPointUtf16>(
3552        &self,
3553        buffer: &ModelHandle<Buffer>,
3554        position: T,
3555        cx: &mut ModelContext<Self>,
3556    ) -> Task<Result<Vec<DocumentHighlight>>> {
3557        let position = position.to_point_utf16(buffer.read(cx));
3558        self.request_lsp(buffer.clone(), GetDocumentHighlights { position }, cx)
3559    }
3560
3561    pub fn symbols(&self, query: &str, cx: &mut ModelContext<Self>) -> Task<Result<Vec<Symbol>>> {
3562        if self.is_local() {
3563            let mut requests = Vec::new();
3564            for ((worktree_id, _), server_id) in self.language_server_ids.iter() {
3565                let worktree_id = *worktree_id;
3566                if let Some(worktree) = self
3567                    .worktree_for_id(worktree_id, cx)
3568                    .and_then(|worktree| worktree.read(cx).as_local())
3569                {
3570                    if let Some(LanguageServerState::Running {
3571                        adapter,
3572                        language,
3573                        server,
3574                        ..
3575                    }) = self.language_servers.get(server_id)
3576                    {
3577                        let adapter = adapter.clone();
3578                        let language = language.clone();
3579                        let worktree_abs_path = worktree.abs_path().clone();
3580                        requests.push(
3581                            server
3582                                .request::<lsp::request::WorkspaceSymbol>(
3583                                    lsp::WorkspaceSymbolParams {
3584                                        query: query.to_string(),
3585                                        ..Default::default()
3586                                    },
3587                                )
3588                                .log_err()
3589                                .map(move |response| {
3590                                    (
3591                                        adapter,
3592                                        language,
3593                                        worktree_id,
3594                                        worktree_abs_path,
3595                                        response.unwrap_or_default(),
3596                                    )
3597                                }),
3598                        );
3599                    }
3600                }
3601            }
3602
3603            cx.spawn_weak(|this, cx| async move {
3604                let responses = futures::future::join_all(requests).await;
3605                let this = if let Some(this) = this.upgrade(&cx) {
3606                    this
3607                } else {
3608                    return Ok(Default::default());
3609                };
3610                let symbols = this.read_with(&cx, |this, cx| {
3611                    let mut symbols = Vec::new();
3612                    for (
3613                        adapter,
3614                        adapter_language,
3615                        source_worktree_id,
3616                        worktree_abs_path,
3617                        response,
3618                    ) in responses
3619                    {
3620                        symbols.extend(response.into_iter().flatten().filter_map(|lsp_symbol| {
3621                            let abs_path = lsp_symbol.location.uri.to_file_path().ok()?;
3622                            let mut worktree_id = source_worktree_id;
3623                            let path;
3624                            if let Some((worktree, rel_path)) =
3625                                this.find_local_worktree(&abs_path, cx)
3626                            {
3627                                worktree_id = worktree.read(cx).id();
3628                                path = rel_path;
3629                            } else {
3630                                path = relativize_path(&worktree_abs_path, &abs_path);
3631                            }
3632
3633                            let project_path = ProjectPath {
3634                                worktree_id,
3635                                path: path.into(),
3636                            };
3637                            let signature = this.symbol_signature(&project_path);
3638                            let adapter_language = adapter_language.clone();
3639                            let language = this
3640                                .languages
3641                                .language_for_file(&project_path.path, None)
3642                                .unwrap_or_else(move |_| adapter_language);
3643                            let language_server_name = adapter.name.clone();
3644                            Some(async move {
3645                                let language = language.await;
3646                                let label = language
3647                                    .label_for_symbol(&lsp_symbol.name, lsp_symbol.kind)
3648                                    .await;
3649
3650                                Symbol {
3651                                    language_server_name,
3652                                    source_worktree_id,
3653                                    path: project_path,
3654                                    label: label.unwrap_or_else(|| {
3655                                        CodeLabel::plain(lsp_symbol.name.clone(), None)
3656                                    }),
3657                                    kind: lsp_symbol.kind,
3658                                    name: lsp_symbol.name,
3659                                    range: range_from_lsp(lsp_symbol.location.range),
3660                                    signature,
3661                                }
3662                            })
3663                        }));
3664                    }
3665                    symbols
3666                });
3667                Ok(futures::future::join_all(symbols).await)
3668            })
3669        } else if let Some(project_id) = self.remote_id() {
3670            let request = self.client.request(proto::GetProjectSymbols {
3671                project_id,
3672                query: query.to_string(),
3673            });
3674            cx.spawn_weak(|this, cx| async move {
3675                let response = request.await?;
3676                let mut symbols = Vec::new();
3677                if let Some(this) = this.upgrade(&cx) {
3678                    let new_symbols = this.read_with(&cx, |this, _| {
3679                        response
3680                            .symbols
3681                            .into_iter()
3682                            .map(|symbol| this.deserialize_symbol(symbol))
3683                            .collect::<Vec<_>>()
3684                    });
3685                    symbols = futures::future::join_all(new_symbols)
3686                        .await
3687                        .into_iter()
3688                        .filter_map(|symbol| symbol.log_err())
3689                        .collect::<Vec<_>>();
3690                }
3691                Ok(symbols)
3692            })
3693        } else {
3694            Task::ready(Ok(Default::default()))
3695        }
3696    }
3697
3698    pub fn open_buffer_for_symbol(
3699        &mut self,
3700        symbol: &Symbol,
3701        cx: &mut ModelContext<Self>,
3702    ) -> Task<Result<ModelHandle<Buffer>>> {
3703        if self.is_local() {
3704            let language_server_id = if let Some(id) = self.language_server_ids.get(&(
3705                symbol.source_worktree_id,
3706                symbol.language_server_name.clone(),
3707            )) {
3708                *id
3709            } else {
3710                return Task::ready(Err(anyhow!(
3711                    "language server for worktree and language not found"
3712                )));
3713            };
3714
3715            let worktree_abs_path = if let Some(worktree_abs_path) = self
3716                .worktree_for_id(symbol.path.worktree_id, cx)
3717                .and_then(|worktree| worktree.read(cx).as_local())
3718                .map(|local_worktree| local_worktree.abs_path())
3719            {
3720                worktree_abs_path
3721            } else {
3722                return Task::ready(Err(anyhow!("worktree not found for symbol")));
3723            };
3724            let symbol_abs_path = worktree_abs_path.join(&symbol.path.path);
3725            let symbol_uri = if let Ok(uri) = lsp::Url::from_file_path(symbol_abs_path) {
3726                uri
3727            } else {
3728                return Task::ready(Err(anyhow!("invalid symbol path")));
3729            };
3730
3731            self.open_local_buffer_via_lsp(
3732                symbol_uri,
3733                language_server_id,
3734                symbol.language_server_name.clone(),
3735                cx,
3736            )
3737        } else if let Some(project_id) = self.remote_id() {
3738            let request = self.client.request(proto::OpenBufferForSymbol {
3739                project_id,
3740                symbol: Some(serialize_symbol(symbol)),
3741            });
3742            cx.spawn(|this, mut cx| async move {
3743                let response = request.await?;
3744                this.update(&mut cx, |this, cx| {
3745                    this.wait_for_remote_buffer(response.buffer_id, cx)
3746                })
3747                .await
3748            })
3749        } else {
3750            Task::ready(Err(anyhow!("project does not have a remote id")))
3751        }
3752    }
3753
3754    pub fn hover<T: ToPointUtf16>(
3755        &self,
3756        buffer: &ModelHandle<Buffer>,
3757        position: T,
3758        cx: &mut ModelContext<Self>,
3759    ) -> Task<Result<Option<Hover>>> {
3760        let position = position.to_point_utf16(buffer.read(cx));
3761        self.request_lsp(buffer.clone(), GetHover { position }, cx)
3762    }
3763
3764    pub fn completions<T: ToPointUtf16>(
3765        &self,
3766        buffer: &ModelHandle<Buffer>,
3767        position: T,
3768        cx: &mut ModelContext<Self>,
3769    ) -> Task<Result<Vec<Completion>>> {
3770        let position = position.to_point_utf16(buffer.read(cx));
3771        self.request_lsp(buffer.clone(), GetCompletions { position }, cx)
3772    }
3773
3774    pub fn apply_additional_edits_for_completion(
3775        &self,
3776        buffer_handle: ModelHandle<Buffer>,
3777        completion: Completion,
3778        push_to_history: bool,
3779        cx: &mut ModelContext<Self>,
3780    ) -> Task<Result<Option<Transaction>>> {
3781        let buffer = buffer_handle.read(cx);
3782        let buffer_id = buffer.remote_id();
3783
3784        if self.is_local() {
3785            let lang_server = match self.primary_language_servers_for_buffer(buffer, cx) {
3786                Some((_, server)) => server.clone(),
3787                _ => return Task::ready(Ok(Default::default())),
3788            };
3789
3790            cx.spawn(|this, mut cx| async move {
3791                let resolved_completion = lang_server
3792                    .request::<lsp::request::ResolveCompletionItem>(completion.lsp_completion)
3793                    .await?;
3794
3795                if let Some(edits) = resolved_completion.additional_text_edits {
3796                    let edits = this
3797                        .update(&mut cx, |this, cx| {
3798                            this.edits_from_lsp(
3799                                &buffer_handle,
3800                                edits,
3801                                lang_server.server_id(),
3802                                None,
3803                                cx,
3804                            )
3805                        })
3806                        .await?;
3807
3808                    buffer_handle.update(&mut cx, |buffer, cx| {
3809                        buffer.finalize_last_transaction();
3810                        buffer.start_transaction();
3811
3812                        for (range, text) in edits {
3813                            let primary = &completion.old_range;
3814                            let start_within = primary.start.cmp(&range.start, buffer).is_le()
3815                                && primary.end.cmp(&range.start, buffer).is_ge();
3816                            let end_within = range.start.cmp(&primary.end, buffer).is_le()
3817                                && range.end.cmp(&primary.end, buffer).is_ge();
3818
3819                            //Skip addtional edits which overlap with the primary completion edit
3820                            //https://github.com/zed-industries/zed/pull/1871
3821                            if !start_within && !end_within {
3822                                buffer.edit([(range, text)], None, cx);
3823                            }
3824                        }
3825
3826                        let transaction = if buffer.end_transaction(cx).is_some() {
3827                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
3828                            if !push_to_history {
3829                                buffer.forget_transaction(transaction.id);
3830                            }
3831                            Some(transaction)
3832                        } else {
3833                            None
3834                        };
3835                        Ok(transaction)
3836                    })
3837                } else {
3838                    Ok(None)
3839                }
3840            })
3841        } else if let Some(project_id) = self.remote_id() {
3842            let client = self.client.clone();
3843            cx.spawn(|_, mut cx| async move {
3844                let response = client
3845                    .request(proto::ApplyCompletionAdditionalEdits {
3846                        project_id,
3847                        buffer_id,
3848                        completion: Some(language::proto::serialize_completion(&completion)),
3849                    })
3850                    .await?;
3851
3852                if let Some(transaction) = response.transaction {
3853                    let transaction = language::proto::deserialize_transaction(transaction)?;
3854                    buffer_handle
3855                        .update(&mut cx, |buffer, _| {
3856                            buffer.wait_for_edits(transaction.edit_ids.iter().copied())
3857                        })
3858                        .await?;
3859                    if push_to_history {
3860                        buffer_handle.update(&mut cx, |buffer, _| {
3861                            buffer.push_transaction(transaction.clone(), Instant::now());
3862                        });
3863                    }
3864                    Ok(Some(transaction))
3865                } else {
3866                    Ok(None)
3867                }
3868            })
3869        } else {
3870            Task::ready(Err(anyhow!("project does not have a remote id")))
3871        }
3872    }
3873
3874    pub fn code_actions<T: Clone + ToOffset>(
3875        &self,
3876        buffer_handle: &ModelHandle<Buffer>,
3877        range: Range<T>,
3878        cx: &mut ModelContext<Self>,
3879    ) -> Task<Result<Vec<CodeAction>>> {
3880        let buffer = buffer_handle.read(cx);
3881        let range = buffer.anchor_before(range.start)..buffer.anchor_before(range.end);
3882        self.request_lsp(buffer_handle.clone(), GetCodeActions { range }, cx)
3883    }
3884
3885    pub fn apply_code_action(
3886        &self,
3887        buffer_handle: ModelHandle<Buffer>,
3888        mut action: CodeAction,
3889        push_to_history: bool,
3890        cx: &mut ModelContext<Self>,
3891    ) -> Task<Result<ProjectTransaction>> {
3892        if self.is_local() {
3893            let buffer = buffer_handle.read(cx);
3894            let (lsp_adapter, lang_server) = if let Some((adapter, server)) =
3895                self.language_server_for_buffer(buffer, action.server_id, cx)
3896            {
3897                (adapter.clone(), server.clone())
3898            } else {
3899                return Task::ready(Ok(Default::default()));
3900            };
3901            let range = action.range.to_point_utf16(buffer);
3902
3903            cx.spawn(|this, mut cx| async move {
3904                if let Some(lsp_range) = action
3905                    .lsp_action
3906                    .data
3907                    .as_mut()
3908                    .and_then(|d| d.get_mut("codeActionParams"))
3909                    .and_then(|d| d.get_mut("range"))
3910                {
3911                    *lsp_range = serde_json::to_value(&range_to_lsp(range)).unwrap();
3912                    action.lsp_action = lang_server
3913                        .request::<lsp::request::CodeActionResolveRequest>(action.lsp_action)
3914                        .await?;
3915                } else {
3916                    let actions = this
3917                        .update(&mut cx, |this, cx| {
3918                            this.code_actions(&buffer_handle, action.range, cx)
3919                        })
3920                        .await?;
3921                    action.lsp_action = actions
3922                        .into_iter()
3923                        .find(|a| a.lsp_action.title == action.lsp_action.title)
3924                        .ok_or_else(|| anyhow!("code action is outdated"))?
3925                        .lsp_action;
3926                }
3927
3928                if let Some(edit) = action.lsp_action.edit {
3929                    if edit.changes.is_some() || edit.document_changes.is_some() {
3930                        return Self::deserialize_workspace_edit(
3931                            this,
3932                            edit,
3933                            push_to_history,
3934                            lsp_adapter.clone(),
3935                            lang_server.clone(),
3936                            &mut cx,
3937                        )
3938                        .await;
3939                    }
3940                }
3941
3942                if let Some(command) = action.lsp_action.command {
3943                    this.update(&mut cx, |this, _| {
3944                        this.last_workspace_edits_by_language_server
3945                            .remove(&lang_server.server_id());
3946                    });
3947                    lang_server
3948                        .request::<lsp::request::ExecuteCommand>(lsp::ExecuteCommandParams {
3949                            command: command.command,
3950                            arguments: command.arguments.unwrap_or_default(),
3951                            ..Default::default()
3952                        })
3953                        .await?;
3954                    return Ok(this.update(&mut cx, |this, _| {
3955                        this.last_workspace_edits_by_language_server
3956                            .remove(&lang_server.server_id())
3957                            .unwrap_or_default()
3958                    }));
3959                }
3960
3961                Ok(ProjectTransaction::default())
3962            })
3963        } else if let Some(project_id) = self.remote_id() {
3964            let client = self.client.clone();
3965            let request = proto::ApplyCodeAction {
3966                project_id,
3967                buffer_id: buffer_handle.read(cx).remote_id(),
3968                action: Some(language::proto::serialize_code_action(&action)),
3969            };
3970            cx.spawn(|this, mut cx| async move {
3971                let response = client
3972                    .request(request)
3973                    .await?
3974                    .transaction
3975                    .ok_or_else(|| anyhow!("missing transaction"))?;
3976                this.update(&mut cx, |this, cx| {
3977                    this.deserialize_project_transaction(response, push_to_history, cx)
3978                })
3979                .await
3980            })
3981        } else {
3982            Task::ready(Err(anyhow!("project does not have a remote id")))
3983        }
3984    }
3985
3986    async fn deserialize_workspace_edit(
3987        this: ModelHandle<Self>,
3988        edit: lsp::WorkspaceEdit,
3989        push_to_history: bool,
3990        lsp_adapter: Arc<CachedLspAdapter>,
3991        language_server: Arc<LanguageServer>,
3992        cx: &mut AsyncAppContext,
3993    ) -> Result<ProjectTransaction> {
3994        let fs = this.read_with(cx, |this, _| this.fs.clone());
3995        let mut operations = Vec::new();
3996        if let Some(document_changes) = edit.document_changes {
3997            match document_changes {
3998                lsp::DocumentChanges::Edits(edits) => {
3999                    operations.extend(edits.into_iter().map(lsp::DocumentChangeOperation::Edit))
4000                }
4001                lsp::DocumentChanges::Operations(ops) => operations = ops,
4002            }
4003        } else if let Some(changes) = edit.changes {
4004            operations.extend(changes.into_iter().map(|(uri, edits)| {
4005                lsp::DocumentChangeOperation::Edit(lsp::TextDocumentEdit {
4006                    text_document: lsp::OptionalVersionedTextDocumentIdentifier {
4007                        uri,
4008                        version: None,
4009                    },
4010                    edits: edits.into_iter().map(lsp::OneOf::Left).collect(),
4011                })
4012            }));
4013        }
4014
4015        let mut project_transaction = ProjectTransaction::default();
4016        for operation in operations {
4017            match operation {
4018                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Create(op)) => {
4019                    let abs_path = op
4020                        .uri
4021                        .to_file_path()
4022                        .map_err(|_| anyhow!("can't convert URI to path"))?;
4023
4024                    if let Some(parent_path) = abs_path.parent() {
4025                        fs.create_dir(parent_path).await?;
4026                    }
4027                    if abs_path.ends_with("/") {
4028                        fs.create_dir(&abs_path).await?;
4029                    } else {
4030                        fs.create_file(&abs_path, op.options.map(Into::into).unwrap_or_default())
4031                            .await?;
4032                    }
4033                }
4034
4035                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Rename(op)) => {
4036                    let source_abs_path = op
4037                        .old_uri
4038                        .to_file_path()
4039                        .map_err(|_| anyhow!("can't convert URI to path"))?;
4040                    let target_abs_path = op
4041                        .new_uri
4042                        .to_file_path()
4043                        .map_err(|_| anyhow!("can't convert URI to path"))?;
4044                    fs.rename(
4045                        &source_abs_path,
4046                        &target_abs_path,
4047                        op.options.map(Into::into).unwrap_or_default(),
4048                    )
4049                    .await?;
4050                }
4051
4052                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Delete(op)) => {
4053                    let abs_path = op
4054                        .uri
4055                        .to_file_path()
4056                        .map_err(|_| anyhow!("can't convert URI to path"))?;
4057                    let options = op.options.map(Into::into).unwrap_or_default();
4058                    if abs_path.ends_with("/") {
4059                        fs.remove_dir(&abs_path, options).await?;
4060                    } else {
4061                        fs.remove_file(&abs_path, options).await?;
4062                    }
4063                }
4064
4065                lsp::DocumentChangeOperation::Edit(op) => {
4066                    let buffer_to_edit = this
4067                        .update(cx, |this, cx| {
4068                            this.open_local_buffer_via_lsp(
4069                                op.text_document.uri,
4070                                language_server.server_id(),
4071                                lsp_adapter.name.clone(),
4072                                cx,
4073                            )
4074                        })
4075                        .await?;
4076
4077                    let edits = this
4078                        .update(cx, |this, cx| {
4079                            let edits = op.edits.into_iter().map(|edit| match edit {
4080                                lsp::OneOf::Left(edit) => edit,
4081                                lsp::OneOf::Right(edit) => edit.text_edit,
4082                            });
4083                            this.edits_from_lsp(
4084                                &buffer_to_edit,
4085                                edits,
4086                                language_server.server_id(),
4087                                op.text_document.version,
4088                                cx,
4089                            )
4090                        })
4091                        .await?;
4092
4093                    let transaction = buffer_to_edit.update(cx, |buffer, cx| {
4094                        buffer.finalize_last_transaction();
4095                        buffer.start_transaction();
4096                        for (range, text) in edits {
4097                            buffer.edit([(range, text)], None, cx);
4098                        }
4099                        let transaction = if buffer.end_transaction(cx).is_some() {
4100                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
4101                            if !push_to_history {
4102                                buffer.forget_transaction(transaction.id);
4103                            }
4104                            Some(transaction)
4105                        } else {
4106                            None
4107                        };
4108
4109                        transaction
4110                    });
4111                    if let Some(transaction) = transaction {
4112                        project_transaction.0.insert(buffer_to_edit, transaction);
4113                    }
4114                }
4115            }
4116        }
4117
4118        Ok(project_transaction)
4119    }
4120
4121    pub fn prepare_rename<T: ToPointUtf16>(
4122        &self,
4123        buffer: ModelHandle<Buffer>,
4124        position: T,
4125        cx: &mut ModelContext<Self>,
4126    ) -> Task<Result<Option<Range<Anchor>>>> {
4127        let position = position.to_point_utf16(buffer.read(cx));
4128        self.request_lsp(buffer, PrepareRename { position }, cx)
4129    }
4130
4131    pub fn perform_rename<T: ToPointUtf16>(
4132        &self,
4133        buffer: ModelHandle<Buffer>,
4134        position: T,
4135        new_name: String,
4136        push_to_history: bool,
4137        cx: &mut ModelContext<Self>,
4138    ) -> Task<Result<ProjectTransaction>> {
4139        let position = position.to_point_utf16(buffer.read(cx));
4140        self.request_lsp(
4141            buffer,
4142            PerformRename {
4143                position,
4144                new_name,
4145                push_to_history,
4146            },
4147            cx,
4148        )
4149    }
4150
4151    #[allow(clippy::type_complexity)]
4152    pub fn search(
4153        &self,
4154        query: SearchQuery,
4155        cx: &mut ModelContext<Self>,
4156    ) -> Task<Result<HashMap<ModelHandle<Buffer>, Vec<Range<Anchor>>>>> {
4157        if self.is_local() {
4158            let snapshots = self
4159                .visible_worktrees(cx)
4160                .filter_map(|tree| {
4161                    let tree = tree.read(cx).as_local()?;
4162                    Some(tree.snapshot())
4163                })
4164                .collect::<Vec<_>>();
4165
4166            let background = cx.background().clone();
4167            let path_count: usize = snapshots.iter().map(|s| s.visible_file_count()).sum();
4168            if path_count == 0 {
4169                return Task::ready(Ok(Default::default()));
4170            }
4171            let workers = background.num_cpus().min(path_count);
4172            let (matching_paths_tx, mut matching_paths_rx) = smol::channel::bounded(1024);
4173            cx.background()
4174                .spawn({
4175                    let fs = self.fs.clone();
4176                    let background = cx.background().clone();
4177                    let query = query.clone();
4178                    async move {
4179                        let fs = &fs;
4180                        let query = &query;
4181                        let matching_paths_tx = &matching_paths_tx;
4182                        let paths_per_worker = (path_count + workers - 1) / workers;
4183                        let snapshots = &snapshots;
4184                        background
4185                            .scoped(|scope| {
4186                                for worker_ix in 0..workers {
4187                                    let worker_start_ix = worker_ix * paths_per_worker;
4188                                    let worker_end_ix = worker_start_ix + paths_per_worker;
4189                                    scope.spawn(async move {
4190                                        let mut snapshot_start_ix = 0;
4191                                        let mut abs_path = PathBuf::new();
4192                                        for snapshot in snapshots {
4193                                            let snapshot_end_ix =
4194                                                snapshot_start_ix + snapshot.visible_file_count();
4195                                            if worker_end_ix <= snapshot_start_ix {
4196                                                break;
4197                                            } else if worker_start_ix > snapshot_end_ix {
4198                                                snapshot_start_ix = snapshot_end_ix;
4199                                                continue;
4200                                            } else {
4201                                                let start_in_snapshot = worker_start_ix
4202                                                    .saturating_sub(snapshot_start_ix);
4203                                                let end_in_snapshot =
4204                                                    cmp::min(worker_end_ix, snapshot_end_ix)
4205                                                        - snapshot_start_ix;
4206
4207                                                for entry in snapshot
4208                                                    .files(false, start_in_snapshot)
4209                                                    .take(end_in_snapshot - start_in_snapshot)
4210                                                {
4211                                                    if matching_paths_tx.is_closed() {
4212                                                        break;
4213                                                    }
4214
4215                                                    abs_path.clear();
4216                                                    abs_path.push(&snapshot.abs_path());
4217                                                    abs_path.push(&entry.path);
4218                                                    let matches = if let Some(file) =
4219                                                        fs.open_sync(&abs_path).await.log_err()
4220                                                    {
4221                                                        query.detect(file).unwrap_or(false)
4222                                                    } else {
4223                                                        false
4224                                                    };
4225
4226                                                    if matches {
4227                                                        let project_path =
4228                                                            (snapshot.id(), entry.path.clone());
4229                                                        if matching_paths_tx
4230                                                            .send(project_path)
4231                                                            .await
4232                                                            .is_err()
4233                                                        {
4234                                                            break;
4235                                                        }
4236                                                    }
4237                                                }
4238
4239                                                snapshot_start_ix = snapshot_end_ix;
4240                                            }
4241                                        }
4242                                    });
4243                                }
4244                            })
4245                            .await;
4246                    }
4247                })
4248                .detach();
4249
4250            let (buffers_tx, buffers_rx) = smol::channel::bounded(1024);
4251            let open_buffers = self
4252                .opened_buffers
4253                .values()
4254                .filter_map(|b| b.upgrade(cx))
4255                .collect::<HashSet<_>>();
4256            cx.spawn(|this, cx| async move {
4257                for buffer in &open_buffers {
4258                    let snapshot = buffer.read_with(&cx, |buffer, _| buffer.snapshot());
4259                    buffers_tx.send((buffer.clone(), snapshot)).await?;
4260                }
4261
4262                let open_buffers = Rc::new(RefCell::new(open_buffers));
4263                while let Some(project_path) = matching_paths_rx.next().await {
4264                    if buffers_tx.is_closed() {
4265                        break;
4266                    }
4267
4268                    let this = this.clone();
4269                    let open_buffers = open_buffers.clone();
4270                    let buffers_tx = buffers_tx.clone();
4271                    cx.spawn(|mut cx| async move {
4272                        if let Some(buffer) = this
4273                            .update(&mut cx, |this, cx| this.open_buffer(project_path, cx))
4274                            .await
4275                            .log_err()
4276                        {
4277                            if open_buffers.borrow_mut().insert(buffer.clone()) {
4278                                let snapshot = buffer.read_with(&cx, |buffer, _| buffer.snapshot());
4279                                buffers_tx.send((buffer, snapshot)).await?;
4280                            }
4281                        }
4282
4283                        Ok::<_, anyhow::Error>(())
4284                    })
4285                    .detach();
4286                }
4287
4288                Ok::<_, anyhow::Error>(())
4289            })
4290            .detach_and_log_err(cx);
4291
4292            let background = cx.background().clone();
4293            cx.background().spawn(async move {
4294                let query = &query;
4295                let mut matched_buffers = Vec::new();
4296                for _ in 0..workers {
4297                    matched_buffers.push(HashMap::default());
4298                }
4299                background
4300                    .scoped(|scope| {
4301                        for worker_matched_buffers in matched_buffers.iter_mut() {
4302                            let mut buffers_rx = buffers_rx.clone();
4303                            scope.spawn(async move {
4304                                while let Some((buffer, snapshot)) = buffers_rx.next().await {
4305                                    let buffer_matches = query
4306                                        .search(snapshot.as_rope())
4307                                        .await
4308                                        .iter()
4309                                        .map(|range| {
4310                                            snapshot.anchor_before(range.start)
4311                                                ..snapshot.anchor_after(range.end)
4312                                        })
4313                                        .collect::<Vec<_>>();
4314                                    if !buffer_matches.is_empty() {
4315                                        worker_matched_buffers
4316                                            .insert(buffer.clone(), buffer_matches);
4317                                    }
4318                                }
4319                            });
4320                        }
4321                    })
4322                    .await;
4323                Ok(matched_buffers.into_iter().flatten().collect())
4324            })
4325        } else if let Some(project_id) = self.remote_id() {
4326            let request = self.client.request(query.to_proto(project_id));
4327            cx.spawn(|this, mut cx| async move {
4328                let response = request.await?;
4329                let mut result = HashMap::default();
4330                for location in response.locations {
4331                    let target_buffer = this
4332                        .update(&mut cx, |this, cx| {
4333                            this.wait_for_remote_buffer(location.buffer_id, cx)
4334                        })
4335                        .await?;
4336                    let start = location
4337                        .start
4338                        .and_then(deserialize_anchor)
4339                        .ok_or_else(|| anyhow!("missing target start"))?;
4340                    let end = location
4341                        .end
4342                        .and_then(deserialize_anchor)
4343                        .ok_or_else(|| anyhow!("missing target end"))?;
4344                    result
4345                        .entry(target_buffer)
4346                        .or_insert(Vec::new())
4347                        .push(start..end)
4348                }
4349                Ok(result)
4350            })
4351        } else {
4352            Task::ready(Ok(Default::default()))
4353        }
4354    }
4355
4356    // TODO: Wire this up to allow selecting a server?
4357    fn request_lsp<R: LspCommand>(
4358        &self,
4359        buffer_handle: ModelHandle<Buffer>,
4360        request: R,
4361        cx: &mut ModelContext<Self>,
4362    ) -> Task<Result<R::Response>>
4363    where
4364        <R::LspRequest as lsp::request::Request>::Result: Send,
4365    {
4366        let buffer = buffer_handle.read(cx);
4367        if self.is_local() {
4368            let file = File::from_dyn(buffer.file()).and_then(File::as_local);
4369            if let Some((file, language_server)) = file.zip(
4370                self.primary_language_servers_for_buffer(buffer, cx)
4371                    .map(|(_, server)| server.clone()),
4372            ) {
4373                let lsp_params = request.to_lsp(&file.abs_path(cx), buffer, &language_server, cx);
4374                return cx.spawn(|this, cx| async move {
4375                    if !request.check_capabilities(language_server.capabilities()) {
4376                        return Ok(Default::default());
4377                    }
4378
4379                    let response = language_server
4380                        .request::<R::LspRequest>(lsp_params)
4381                        .await
4382                        .context("lsp request failed")?;
4383                    request
4384                        .response_from_lsp(
4385                            response,
4386                            this,
4387                            buffer_handle,
4388                            language_server.server_id(),
4389                            cx,
4390                        )
4391                        .await
4392                });
4393            }
4394        } else if let Some(project_id) = self.remote_id() {
4395            let rpc = self.client.clone();
4396            let message = request.to_proto(project_id, buffer);
4397            return cx.spawn_weak(|this, cx| async move {
4398                // Ensure the project is still alive by the time the task
4399                // is scheduled.
4400                this.upgrade(&cx)
4401                    .ok_or_else(|| anyhow!("project dropped"))?;
4402
4403                let response = rpc.request(message).await?;
4404
4405                let this = this
4406                    .upgrade(&cx)
4407                    .ok_or_else(|| anyhow!("project dropped"))?;
4408                if this.read_with(&cx, |this, _| this.is_read_only()) {
4409                    Err(anyhow!("disconnected before completing request"))
4410                } else {
4411                    request
4412                        .response_from_proto(response, this, buffer_handle, cx)
4413                        .await
4414                }
4415            });
4416        }
4417        Task::ready(Ok(Default::default()))
4418    }
4419
4420    pub fn find_or_create_local_worktree(
4421        &mut self,
4422        abs_path: impl AsRef<Path>,
4423        visible: bool,
4424        cx: &mut ModelContext<Self>,
4425    ) -> Task<Result<(ModelHandle<Worktree>, PathBuf)>> {
4426        let abs_path = abs_path.as_ref();
4427        if let Some((tree, relative_path)) = self.find_local_worktree(abs_path, cx) {
4428            Task::ready(Ok((tree, relative_path)))
4429        } else {
4430            let worktree = self.create_local_worktree(abs_path, visible, cx);
4431            cx.foreground()
4432                .spawn(async move { Ok((worktree.await?, PathBuf::new())) })
4433        }
4434    }
4435
4436    pub fn find_local_worktree(
4437        &self,
4438        abs_path: &Path,
4439        cx: &AppContext,
4440    ) -> Option<(ModelHandle<Worktree>, PathBuf)> {
4441        for tree in &self.worktrees {
4442            if let Some(tree) = tree.upgrade(cx) {
4443                if let Some(relative_path) = tree
4444                    .read(cx)
4445                    .as_local()
4446                    .and_then(|t| abs_path.strip_prefix(t.abs_path()).ok())
4447                {
4448                    return Some((tree.clone(), relative_path.into()));
4449                }
4450            }
4451        }
4452        None
4453    }
4454
4455    pub fn is_shared(&self) -> bool {
4456        match &self.client_state {
4457            Some(ProjectClientState::Local { .. }) => true,
4458            _ => false,
4459        }
4460    }
4461
4462    fn create_local_worktree(
4463        &mut self,
4464        abs_path: impl AsRef<Path>,
4465        visible: bool,
4466        cx: &mut ModelContext<Self>,
4467    ) -> Task<Result<ModelHandle<Worktree>>> {
4468        let fs = self.fs.clone();
4469        let client = self.client.clone();
4470        let next_entry_id = self.next_entry_id.clone();
4471        let path: Arc<Path> = abs_path.as_ref().into();
4472        let task = self
4473            .loading_local_worktrees
4474            .entry(path.clone())
4475            .or_insert_with(|| {
4476                cx.spawn(|project, mut cx| {
4477                    async move {
4478                        let worktree = Worktree::local(
4479                            client.clone(),
4480                            path.clone(),
4481                            visible,
4482                            fs,
4483                            next_entry_id,
4484                            &mut cx,
4485                        )
4486                        .await;
4487
4488                        project.update(&mut cx, |project, _| {
4489                            project.loading_local_worktrees.remove(&path);
4490                        });
4491
4492                        let worktree = worktree?;
4493                        project.update(&mut cx, |project, cx| project.add_worktree(&worktree, cx));
4494                        Ok(worktree)
4495                    }
4496                    .map_err(Arc::new)
4497                })
4498                .shared()
4499            })
4500            .clone();
4501        cx.foreground().spawn(async move {
4502            match task.await {
4503                Ok(worktree) => Ok(worktree),
4504                Err(err) => Err(anyhow!("{}", err)),
4505            }
4506        })
4507    }
4508
4509    pub fn remove_worktree(&mut self, id_to_remove: WorktreeId, cx: &mut ModelContext<Self>) {
4510        self.worktrees.retain(|worktree| {
4511            if let Some(worktree) = worktree.upgrade(cx) {
4512                let id = worktree.read(cx).id();
4513                if id == id_to_remove {
4514                    cx.emit(Event::WorktreeRemoved(id));
4515                    false
4516                } else {
4517                    true
4518                }
4519            } else {
4520                false
4521            }
4522        });
4523        self.metadata_changed(cx);
4524    }
4525
4526    fn add_worktree(&mut self, worktree: &ModelHandle<Worktree>, cx: &mut ModelContext<Self>) {
4527        cx.observe(worktree, |_, _, cx| cx.notify()).detach();
4528        if worktree.read(cx).is_local() {
4529            cx.subscribe(worktree, |this, worktree, event, cx| match event {
4530                worktree::Event::UpdatedEntries(changes) => {
4531                    this.update_local_worktree_buffers(&worktree, cx);
4532                    this.update_local_worktree_language_servers(&worktree, changes, cx);
4533                }
4534                worktree::Event::UpdatedGitRepositories(updated_repos) => {
4535                    this.update_local_worktree_buffers_git_repos(worktree, updated_repos, cx)
4536                }
4537            })
4538            .detach();
4539        }
4540
4541        let push_strong_handle = {
4542            let worktree = worktree.read(cx);
4543            self.is_shared() || worktree.is_visible() || worktree.is_remote()
4544        };
4545        if push_strong_handle {
4546            self.worktrees
4547                .push(WorktreeHandle::Strong(worktree.clone()));
4548        } else {
4549            self.worktrees
4550                .push(WorktreeHandle::Weak(worktree.downgrade()));
4551        }
4552
4553        cx.observe_release(worktree, |this, worktree, cx| {
4554            let _ = this.remove_worktree(worktree.id(), cx);
4555        })
4556        .detach();
4557
4558        cx.emit(Event::WorktreeAdded);
4559        self.metadata_changed(cx);
4560    }
4561
4562    fn update_local_worktree_buffers(
4563        &mut self,
4564        worktree_handle: &ModelHandle<Worktree>,
4565        cx: &mut ModelContext<Self>,
4566    ) {
4567        let snapshot = worktree_handle.read(cx).snapshot();
4568
4569        let mut buffers_to_delete = Vec::new();
4570        let mut renamed_buffers = Vec::new();
4571
4572        for (buffer_id, buffer) in &self.opened_buffers {
4573            if let Some(buffer) = buffer.upgrade(cx) {
4574                buffer.update(cx, |buffer, cx| {
4575                    if let Some(old_file) = File::from_dyn(buffer.file()) {
4576                        if old_file.worktree != *worktree_handle {
4577                            return;
4578                        }
4579
4580                        let new_file = if let Some(entry) = snapshot.entry_for_id(old_file.entry_id)
4581                        {
4582                            File {
4583                                is_local: true,
4584                                entry_id: entry.id,
4585                                mtime: entry.mtime,
4586                                path: entry.path.clone(),
4587                                worktree: worktree_handle.clone(),
4588                                is_deleted: false,
4589                            }
4590                        } else if let Some(entry) =
4591                            snapshot.entry_for_path(old_file.path().as_ref())
4592                        {
4593                            File {
4594                                is_local: true,
4595                                entry_id: entry.id,
4596                                mtime: entry.mtime,
4597                                path: entry.path.clone(),
4598                                worktree: worktree_handle.clone(),
4599                                is_deleted: false,
4600                            }
4601                        } else {
4602                            File {
4603                                is_local: true,
4604                                entry_id: old_file.entry_id,
4605                                path: old_file.path().clone(),
4606                                mtime: old_file.mtime(),
4607                                worktree: worktree_handle.clone(),
4608                                is_deleted: true,
4609                            }
4610                        };
4611
4612                        let old_path = old_file.abs_path(cx);
4613                        if new_file.abs_path(cx) != old_path {
4614                            renamed_buffers.push((cx.handle(), old_file.clone()));
4615                        }
4616
4617                        if new_file != *old_file {
4618                            if let Some(project_id) = self.remote_id() {
4619                                self.client
4620                                    .send(proto::UpdateBufferFile {
4621                                        project_id,
4622                                        buffer_id: *buffer_id as u64,
4623                                        file: Some(new_file.to_proto()),
4624                                    })
4625                                    .log_err();
4626                            }
4627
4628                            buffer.file_updated(Arc::new(new_file), cx).detach();
4629                        }
4630                    }
4631                });
4632            } else {
4633                buffers_to_delete.push(*buffer_id);
4634            }
4635        }
4636
4637        for buffer_id in buffers_to_delete {
4638            self.opened_buffers.remove(&buffer_id);
4639        }
4640
4641        for (buffer, old_file) in renamed_buffers {
4642            self.unregister_buffer_from_language_servers(&buffer, &old_file, cx);
4643            self.detect_language_for_buffer(&buffer, cx);
4644            self.register_buffer_with_language_servers(&buffer, cx);
4645        }
4646    }
4647
4648    fn update_local_worktree_language_servers(
4649        &mut self,
4650        worktree_handle: &ModelHandle<Worktree>,
4651        changes: &HashMap<Arc<Path>, PathChange>,
4652        cx: &mut ModelContext<Self>,
4653    ) {
4654        let worktree_id = worktree_handle.read(cx).id();
4655        let abs_path = worktree_handle.read(cx).abs_path();
4656        for ((server_worktree_id, _), server_id) in &self.language_server_ids {
4657            if *server_worktree_id == worktree_id {
4658                if let Some(server) = self.language_servers.get(server_id) {
4659                    if let LanguageServerState::Running {
4660                        server,
4661                        watched_paths,
4662                        ..
4663                    } = server
4664                    {
4665                        let params = lsp::DidChangeWatchedFilesParams {
4666                            changes: changes
4667                                .iter()
4668                                .filter_map(|(path, change)| {
4669                                    let path = abs_path.join(path);
4670                                    if watched_paths.matches(&path) {
4671                                        Some(lsp::FileEvent {
4672                                            uri: lsp::Url::from_file_path(path).unwrap(),
4673                                            typ: match change {
4674                                                PathChange::Added => lsp::FileChangeType::CREATED,
4675                                                PathChange::Removed => lsp::FileChangeType::DELETED,
4676                                                PathChange::Updated
4677                                                | PathChange::AddedOrUpdated => {
4678                                                    lsp::FileChangeType::CHANGED
4679                                                }
4680                                            },
4681                                        })
4682                                    } else {
4683                                        None
4684                                    }
4685                                })
4686                                .collect(),
4687                        };
4688
4689                        if !params.changes.is_empty() {
4690                            server
4691                                .notify::<lsp::notification::DidChangeWatchedFiles>(params)
4692                                .log_err();
4693                        }
4694                    }
4695                }
4696            }
4697        }
4698    }
4699
4700    fn update_local_worktree_buffers_git_repos(
4701        &mut self,
4702        worktree: ModelHandle<Worktree>,
4703        repos: &[GitRepositoryEntry],
4704        cx: &mut ModelContext<Self>,
4705    ) {
4706        for (_, buffer) in &self.opened_buffers {
4707            if let Some(buffer) = buffer.upgrade(cx) {
4708                let file = match File::from_dyn(buffer.read(cx).file()) {
4709                    Some(file) => file,
4710                    None => continue,
4711                };
4712                if file.worktree != worktree {
4713                    continue;
4714                }
4715
4716                let path = file.path().clone();
4717
4718                let repo = match repos.iter().find(|repo| repo.manages(&path)) {
4719                    Some(repo) => repo.clone(),
4720                    None => return,
4721                };
4722
4723                let relative_repo = match path.strip_prefix(repo.content_path) {
4724                    Ok(relative_repo) => relative_repo.to_owned(),
4725                    Err(_) => return,
4726                };
4727
4728                let remote_id = self.remote_id();
4729                let client = self.client.clone();
4730
4731                cx.spawn(|_, mut cx| async move {
4732                    let diff_base = cx
4733                        .background()
4734                        .spawn(async move { repo.repo.lock().load_index_text(&relative_repo) })
4735                        .await;
4736
4737                    let buffer_id = buffer.update(&mut cx, |buffer, cx| {
4738                        buffer.set_diff_base(diff_base.clone(), cx);
4739                        buffer.remote_id()
4740                    });
4741
4742                    if let Some(project_id) = remote_id {
4743                        client
4744                            .send(proto::UpdateDiffBase {
4745                                project_id,
4746                                buffer_id: buffer_id as u64,
4747                                diff_base,
4748                            })
4749                            .log_err();
4750                    }
4751                })
4752                .detach();
4753            }
4754        }
4755    }
4756
4757    pub fn set_active_path(&mut self, entry: Option<ProjectPath>, cx: &mut ModelContext<Self>) {
4758        let new_active_entry = entry.and_then(|project_path| {
4759            let worktree = self.worktree_for_id(project_path.worktree_id, cx)?;
4760            let entry = worktree.read(cx).entry_for_path(project_path.path)?;
4761            Some(entry.id)
4762        });
4763        if new_active_entry != self.active_entry {
4764            self.active_entry = new_active_entry;
4765            cx.emit(Event::ActiveEntryChanged(new_active_entry));
4766        }
4767    }
4768
4769    pub fn language_servers_running_disk_based_diagnostics(
4770        &self,
4771    ) -> impl Iterator<Item = LanguageServerId> + '_ {
4772        self.language_server_statuses
4773            .iter()
4774            .filter_map(|(id, status)| {
4775                if status.has_pending_diagnostic_updates {
4776                    Some(*id)
4777                } else {
4778                    None
4779                }
4780            })
4781    }
4782
4783    pub fn diagnostic_summary(&self, cx: &AppContext) -> DiagnosticSummary {
4784        let mut summary = DiagnosticSummary::default();
4785        for (_, _, path_summary) in self.diagnostic_summaries(cx) {
4786            summary.error_count += path_summary.error_count;
4787            summary.warning_count += path_summary.warning_count;
4788        }
4789        summary
4790    }
4791
4792    pub fn diagnostic_summaries<'a>(
4793        &'a self,
4794        cx: &'a AppContext,
4795    ) -> impl Iterator<Item = (ProjectPath, LanguageServerId, DiagnosticSummary)> + 'a {
4796        self.visible_worktrees(cx).flat_map(move |worktree| {
4797            let worktree = worktree.read(cx);
4798            let worktree_id = worktree.id();
4799            worktree
4800                .diagnostic_summaries()
4801                .map(move |(path, server_id, summary)| {
4802                    (ProjectPath { worktree_id, path }, server_id, summary)
4803                })
4804        })
4805    }
4806
4807    pub fn disk_based_diagnostics_started(
4808        &mut self,
4809        language_server_id: LanguageServerId,
4810        cx: &mut ModelContext<Self>,
4811    ) {
4812        cx.emit(Event::DiskBasedDiagnosticsStarted { language_server_id });
4813    }
4814
4815    pub fn disk_based_diagnostics_finished(
4816        &mut self,
4817        language_server_id: LanguageServerId,
4818        cx: &mut ModelContext<Self>,
4819    ) {
4820        cx.emit(Event::DiskBasedDiagnosticsFinished { language_server_id });
4821    }
4822
4823    pub fn active_entry(&self) -> Option<ProjectEntryId> {
4824        self.active_entry
4825    }
4826
4827    pub fn entry_for_path(&self, path: &ProjectPath, cx: &AppContext) -> Option<Entry> {
4828        self.worktree_for_id(path.worktree_id, cx)?
4829            .read(cx)
4830            .entry_for_path(&path.path)
4831            .cloned()
4832    }
4833
4834    pub fn path_for_entry(&self, entry_id: ProjectEntryId, cx: &AppContext) -> Option<ProjectPath> {
4835        let worktree = self.worktree_for_entry(entry_id, cx)?;
4836        let worktree = worktree.read(cx);
4837        let worktree_id = worktree.id();
4838        let path = worktree.entry_for_id(entry_id)?.path.clone();
4839        Some(ProjectPath { worktree_id, path })
4840    }
4841
4842    // RPC message handlers
4843
4844    async fn handle_unshare_project(
4845        this: ModelHandle<Self>,
4846        _: TypedEnvelope<proto::UnshareProject>,
4847        _: Arc<Client>,
4848        mut cx: AsyncAppContext,
4849    ) -> Result<()> {
4850        this.update(&mut cx, |this, cx| {
4851            if this.is_local() {
4852                this.unshare(cx)?;
4853            } else {
4854                this.disconnected_from_host(cx);
4855            }
4856            Ok(())
4857        })
4858    }
4859
4860    async fn handle_add_collaborator(
4861        this: ModelHandle<Self>,
4862        mut envelope: TypedEnvelope<proto::AddProjectCollaborator>,
4863        _: Arc<Client>,
4864        mut cx: AsyncAppContext,
4865    ) -> Result<()> {
4866        let collaborator = envelope
4867            .payload
4868            .collaborator
4869            .take()
4870            .ok_or_else(|| anyhow!("empty collaborator"))?;
4871
4872        let collaborator = Collaborator::from_proto(collaborator)?;
4873        this.update(&mut cx, |this, cx| {
4874            this.shared_buffers.remove(&collaborator.peer_id);
4875            this.collaborators
4876                .insert(collaborator.peer_id, collaborator);
4877            cx.notify();
4878        });
4879
4880        Ok(())
4881    }
4882
4883    async fn handle_update_project_collaborator(
4884        this: ModelHandle<Self>,
4885        envelope: TypedEnvelope<proto::UpdateProjectCollaborator>,
4886        _: Arc<Client>,
4887        mut cx: AsyncAppContext,
4888    ) -> Result<()> {
4889        let old_peer_id = envelope
4890            .payload
4891            .old_peer_id
4892            .ok_or_else(|| anyhow!("missing old peer id"))?;
4893        let new_peer_id = envelope
4894            .payload
4895            .new_peer_id
4896            .ok_or_else(|| anyhow!("missing new peer id"))?;
4897        this.update(&mut cx, |this, cx| {
4898            let collaborator = this
4899                .collaborators
4900                .remove(&old_peer_id)
4901                .ok_or_else(|| anyhow!("received UpdateProjectCollaborator for unknown peer"))?;
4902            let is_host = collaborator.replica_id == 0;
4903            this.collaborators.insert(new_peer_id, collaborator);
4904
4905            let buffers = this.shared_buffers.remove(&old_peer_id);
4906            log::info!(
4907                "peer {} became {}. moving buffers {:?}",
4908                old_peer_id,
4909                new_peer_id,
4910                &buffers
4911            );
4912            if let Some(buffers) = buffers {
4913                this.shared_buffers.insert(new_peer_id, buffers);
4914            }
4915
4916            if is_host {
4917                this.opened_buffers
4918                    .retain(|_, buffer| !matches!(buffer, OpenBuffer::Operations(_)));
4919                this.buffer_ordered_messages_tx
4920                    .unbounded_send(BufferOrderedMessage::Resync)
4921                    .unwrap();
4922            }
4923
4924            cx.emit(Event::CollaboratorUpdated {
4925                old_peer_id,
4926                new_peer_id,
4927            });
4928            cx.notify();
4929            Ok(())
4930        })
4931    }
4932
4933    async fn handle_remove_collaborator(
4934        this: ModelHandle<Self>,
4935        envelope: TypedEnvelope<proto::RemoveProjectCollaborator>,
4936        _: Arc<Client>,
4937        mut cx: AsyncAppContext,
4938    ) -> Result<()> {
4939        this.update(&mut cx, |this, cx| {
4940            let peer_id = envelope
4941                .payload
4942                .peer_id
4943                .ok_or_else(|| anyhow!("invalid peer id"))?;
4944            let replica_id = this
4945                .collaborators
4946                .remove(&peer_id)
4947                .ok_or_else(|| anyhow!("unknown peer {:?}", peer_id))?
4948                .replica_id;
4949            for buffer in this.opened_buffers.values() {
4950                if let Some(buffer) = buffer.upgrade(cx) {
4951                    buffer.update(cx, |buffer, cx| buffer.remove_peer(replica_id, cx));
4952                }
4953            }
4954            this.shared_buffers.remove(&peer_id);
4955
4956            cx.emit(Event::CollaboratorLeft(peer_id));
4957            cx.notify();
4958            Ok(())
4959        })
4960    }
4961
4962    async fn handle_update_project(
4963        this: ModelHandle<Self>,
4964        envelope: TypedEnvelope<proto::UpdateProject>,
4965        _: Arc<Client>,
4966        mut cx: AsyncAppContext,
4967    ) -> Result<()> {
4968        this.update(&mut cx, |this, cx| {
4969            // Don't handle messages that were sent before the response to us joining the project
4970            if envelope.message_id > this.join_project_response_message_id {
4971                this.set_worktrees_from_proto(envelope.payload.worktrees, cx)?;
4972            }
4973            Ok(())
4974        })
4975    }
4976
4977    async fn handle_update_worktree(
4978        this: ModelHandle<Self>,
4979        envelope: TypedEnvelope<proto::UpdateWorktree>,
4980        _: Arc<Client>,
4981        mut cx: AsyncAppContext,
4982    ) -> Result<()> {
4983        this.update(&mut cx, |this, cx| {
4984            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
4985            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
4986                worktree.update(cx, |worktree, _| {
4987                    let worktree = worktree.as_remote_mut().unwrap();
4988                    worktree.update_from_remote(envelope.payload);
4989                });
4990            }
4991            Ok(())
4992        })
4993    }
4994
4995    async fn handle_create_project_entry(
4996        this: ModelHandle<Self>,
4997        envelope: TypedEnvelope<proto::CreateProjectEntry>,
4998        _: Arc<Client>,
4999        mut cx: AsyncAppContext,
5000    ) -> Result<proto::ProjectEntryResponse> {
5001        let worktree = this.update(&mut cx, |this, cx| {
5002            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
5003            this.worktree_for_id(worktree_id, cx)
5004                .ok_or_else(|| anyhow!("worktree not found"))
5005        })?;
5006        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
5007        let entry = worktree
5008            .update(&mut cx, |worktree, cx| {
5009                let worktree = worktree.as_local_mut().unwrap();
5010                let path = PathBuf::from(envelope.payload.path);
5011                worktree.create_entry(path, envelope.payload.is_directory, cx)
5012            })
5013            .await?;
5014        Ok(proto::ProjectEntryResponse {
5015            entry: Some((&entry).into()),
5016            worktree_scan_id: worktree_scan_id as u64,
5017        })
5018    }
5019
5020    async fn handle_rename_project_entry(
5021        this: ModelHandle<Self>,
5022        envelope: TypedEnvelope<proto::RenameProjectEntry>,
5023        _: Arc<Client>,
5024        mut cx: AsyncAppContext,
5025    ) -> Result<proto::ProjectEntryResponse> {
5026        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
5027        let worktree = this.read_with(&cx, |this, cx| {
5028            this.worktree_for_entry(entry_id, cx)
5029                .ok_or_else(|| anyhow!("worktree not found"))
5030        })?;
5031        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
5032        let entry = worktree
5033            .update(&mut cx, |worktree, cx| {
5034                let new_path = PathBuf::from(envelope.payload.new_path);
5035                worktree
5036                    .as_local_mut()
5037                    .unwrap()
5038                    .rename_entry(entry_id, new_path, cx)
5039                    .ok_or_else(|| anyhow!("invalid entry"))
5040            })?
5041            .await?;
5042        Ok(proto::ProjectEntryResponse {
5043            entry: Some((&entry).into()),
5044            worktree_scan_id: worktree_scan_id as u64,
5045        })
5046    }
5047
5048    async fn handle_copy_project_entry(
5049        this: ModelHandle<Self>,
5050        envelope: TypedEnvelope<proto::CopyProjectEntry>,
5051        _: Arc<Client>,
5052        mut cx: AsyncAppContext,
5053    ) -> Result<proto::ProjectEntryResponse> {
5054        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
5055        let worktree = this.read_with(&cx, |this, cx| {
5056            this.worktree_for_entry(entry_id, cx)
5057                .ok_or_else(|| anyhow!("worktree not found"))
5058        })?;
5059        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
5060        let entry = worktree
5061            .update(&mut cx, |worktree, cx| {
5062                let new_path = PathBuf::from(envelope.payload.new_path);
5063                worktree
5064                    .as_local_mut()
5065                    .unwrap()
5066                    .copy_entry(entry_id, new_path, cx)
5067                    .ok_or_else(|| anyhow!("invalid entry"))
5068            })?
5069            .await?;
5070        Ok(proto::ProjectEntryResponse {
5071            entry: Some((&entry).into()),
5072            worktree_scan_id: worktree_scan_id as u64,
5073        })
5074    }
5075
5076    async fn handle_delete_project_entry(
5077        this: ModelHandle<Self>,
5078        envelope: TypedEnvelope<proto::DeleteProjectEntry>,
5079        _: Arc<Client>,
5080        mut cx: AsyncAppContext,
5081    ) -> Result<proto::ProjectEntryResponse> {
5082        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
5083        let worktree = this.read_with(&cx, |this, cx| {
5084            this.worktree_for_entry(entry_id, cx)
5085                .ok_or_else(|| anyhow!("worktree not found"))
5086        })?;
5087        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
5088        worktree
5089            .update(&mut cx, |worktree, cx| {
5090                worktree
5091                    .as_local_mut()
5092                    .unwrap()
5093                    .delete_entry(entry_id, cx)
5094                    .ok_or_else(|| anyhow!("invalid entry"))
5095            })?
5096            .await?;
5097        Ok(proto::ProjectEntryResponse {
5098            entry: None,
5099            worktree_scan_id: worktree_scan_id as u64,
5100        })
5101    }
5102
5103    async fn handle_update_diagnostic_summary(
5104        this: ModelHandle<Self>,
5105        envelope: TypedEnvelope<proto::UpdateDiagnosticSummary>,
5106        _: Arc<Client>,
5107        mut cx: AsyncAppContext,
5108    ) -> Result<()> {
5109        this.update(&mut cx, |this, cx| {
5110            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
5111            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
5112                if let Some(summary) = envelope.payload.summary {
5113                    let project_path = ProjectPath {
5114                        worktree_id,
5115                        path: Path::new(&summary.path).into(),
5116                    };
5117                    worktree.update(cx, |worktree, _| {
5118                        worktree
5119                            .as_remote_mut()
5120                            .unwrap()
5121                            .update_diagnostic_summary(project_path.path.clone(), &summary);
5122                    });
5123                    cx.emit(Event::DiagnosticsUpdated {
5124                        language_server_id: LanguageServerId(summary.language_server_id as usize),
5125                        path: project_path,
5126                    });
5127                }
5128            }
5129            Ok(())
5130        })
5131    }
5132
5133    async fn handle_start_language_server(
5134        this: ModelHandle<Self>,
5135        envelope: TypedEnvelope<proto::StartLanguageServer>,
5136        _: Arc<Client>,
5137        mut cx: AsyncAppContext,
5138    ) -> Result<()> {
5139        let server = envelope
5140            .payload
5141            .server
5142            .ok_or_else(|| anyhow!("invalid server"))?;
5143        this.update(&mut cx, |this, cx| {
5144            this.language_server_statuses.insert(
5145                LanguageServerId(server.id as usize),
5146                LanguageServerStatus {
5147                    name: server.name,
5148                    pending_work: Default::default(),
5149                    has_pending_diagnostic_updates: false,
5150                    progress_tokens: Default::default(),
5151                },
5152            );
5153            cx.notify();
5154        });
5155        Ok(())
5156    }
5157
5158    async fn handle_update_language_server(
5159        this: ModelHandle<Self>,
5160        envelope: TypedEnvelope<proto::UpdateLanguageServer>,
5161        _: Arc<Client>,
5162        mut cx: AsyncAppContext,
5163    ) -> Result<()> {
5164        this.update(&mut cx, |this, cx| {
5165            let language_server_id = LanguageServerId(envelope.payload.language_server_id as usize);
5166
5167            match envelope
5168                .payload
5169                .variant
5170                .ok_or_else(|| anyhow!("invalid variant"))?
5171            {
5172                proto::update_language_server::Variant::WorkStart(payload) => {
5173                    this.on_lsp_work_start(
5174                        language_server_id,
5175                        payload.token,
5176                        LanguageServerProgress {
5177                            message: payload.message,
5178                            percentage: payload.percentage.map(|p| p as usize),
5179                            last_update_at: Instant::now(),
5180                        },
5181                        cx,
5182                    );
5183                }
5184
5185                proto::update_language_server::Variant::WorkProgress(payload) => {
5186                    this.on_lsp_work_progress(
5187                        language_server_id,
5188                        payload.token,
5189                        LanguageServerProgress {
5190                            message: payload.message,
5191                            percentage: payload.percentage.map(|p| p as usize),
5192                            last_update_at: Instant::now(),
5193                        },
5194                        cx,
5195                    );
5196                }
5197
5198                proto::update_language_server::Variant::WorkEnd(payload) => {
5199                    this.on_lsp_work_end(language_server_id, payload.token, cx);
5200                }
5201
5202                proto::update_language_server::Variant::DiskBasedDiagnosticsUpdating(_) => {
5203                    this.disk_based_diagnostics_started(language_server_id, cx);
5204                }
5205
5206                proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(_) => {
5207                    this.disk_based_diagnostics_finished(language_server_id, cx)
5208                }
5209            }
5210
5211            Ok(())
5212        })
5213    }
5214
5215    async fn handle_update_buffer(
5216        this: ModelHandle<Self>,
5217        envelope: TypedEnvelope<proto::UpdateBuffer>,
5218        _: Arc<Client>,
5219        mut cx: AsyncAppContext,
5220    ) -> Result<proto::Ack> {
5221        this.update(&mut cx, |this, cx| {
5222            let payload = envelope.payload.clone();
5223            let buffer_id = payload.buffer_id;
5224            let ops = payload
5225                .operations
5226                .into_iter()
5227                .map(language::proto::deserialize_operation)
5228                .collect::<Result<Vec<_>, _>>()?;
5229            let is_remote = this.is_remote();
5230            match this.opened_buffers.entry(buffer_id) {
5231                hash_map::Entry::Occupied(mut e) => match e.get_mut() {
5232                    OpenBuffer::Strong(buffer) => {
5233                        buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx))?;
5234                    }
5235                    OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
5236                    OpenBuffer::Weak(_) => {}
5237                },
5238                hash_map::Entry::Vacant(e) => {
5239                    assert!(
5240                        is_remote,
5241                        "received buffer update from {:?}",
5242                        envelope.original_sender_id
5243                    );
5244                    e.insert(OpenBuffer::Operations(ops));
5245                }
5246            }
5247            Ok(proto::Ack {})
5248        })
5249    }
5250
5251    async fn handle_create_buffer_for_peer(
5252        this: ModelHandle<Self>,
5253        envelope: TypedEnvelope<proto::CreateBufferForPeer>,
5254        _: Arc<Client>,
5255        mut cx: AsyncAppContext,
5256    ) -> Result<()> {
5257        this.update(&mut cx, |this, cx| {
5258            match envelope
5259                .payload
5260                .variant
5261                .ok_or_else(|| anyhow!("missing variant"))?
5262            {
5263                proto::create_buffer_for_peer::Variant::State(mut state) => {
5264                    let mut buffer_file = None;
5265                    if let Some(file) = state.file.take() {
5266                        let worktree_id = WorktreeId::from_proto(file.worktree_id);
5267                        let worktree = this.worktree_for_id(worktree_id, cx).ok_or_else(|| {
5268                            anyhow!("no worktree found for id {}", file.worktree_id)
5269                        })?;
5270                        buffer_file = Some(Arc::new(File::from_proto(file, worktree.clone(), cx)?)
5271                            as Arc<dyn language::File>);
5272                    }
5273
5274                    let buffer_id = state.id;
5275                    let buffer = cx.add_model(|_| {
5276                        Buffer::from_proto(this.replica_id(), state, buffer_file).unwrap()
5277                    });
5278                    this.incomplete_remote_buffers
5279                        .insert(buffer_id, Some(buffer));
5280                }
5281                proto::create_buffer_for_peer::Variant::Chunk(chunk) => {
5282                    let buffer = this
5283                        .incomplete_remote_buffers
5284                        .get(&chunk.buffer_id)
5285                        .cloned()
5286                        .flatten()
5287                        .ok_or_else(|| {
5288                            anyhow!(
5289                                "received chunk for buffer {} without initial state",
5290                                chunk.buffer_id
5291                            )
5292                        })?;
5293                    let operations = chunk
5294                        .operations
5295                        .into_iter()
5296                        .map(language::proto::deserialize_operation)
5297                        .collect::<Result<Vec<_>>>()?;
5298                    buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx))?;
5299
5300                    if chunk.is_last {
5301                        this.incomplete_remote_buffers.remove(&chunk.buffer_id);
5302                        this.register_buffer(&buffer, cx)?;
5303                    }
5304                }
5305            }
5306
5307            Ok(())
5308        })
5309    }
5310
5311    async fn handle_update_diff_base(
5312        this: ModelHandle<Self>,
5313        envelope: TypedEnvelope<proto::UpdateDiffBase>,
5314        _: Arc<Client>,
5315        mut cx: AsyncAppContext,
5316    ) -> Result<()> {
5317        this.update(&mut cx, |this, cx| {
5318            let buffer_id = envelope.payload.buffer_id;
5319            let diff_base = envelope.payload.diff_base;
5320            if let Some(buffer) = this
5321                .opened_buffers
5322                .get_mut(&buffer_id)
5323                .and_then(|b| b.upgrade(cx))
5324                .or_else(|| {
5325                    this.incomplete_remote_buffers
5326                        .get(&buffer_id)
5327                        .cloned()
5328                        .flatten()
5329                })
5330            {
5331                buffer.update(cx, |buffer, cx| buffer.set_diff_base(diff_base, cx));
5332            }
5333            Ok(())
5334        })
5335    }
5336
5337    async fn handle_update_buffer_file(
5338        this: ModelHandle<Self>,
5339        envelope: TypedEnvelope<proto::UpdateBufferFile>,
5340        _: Arc<Client>,
5341        mut cx: AsyncAppContext,
5342    ) -> Result<()> {
5343        let buffer_id = envelope.payload.buffer_id;
5344
5345        this.update(&mut cx, |this, cx| {
5346            let payload = envelope.payload.clone();
5347            if let Some(buffer) = this
5348                .opened_buffers
5349                .get(&buffer_id)
5350                .and_then(|b| b.upgrade(cx))
5351                .or_else(|| {
5352                    this.incomplete_remote_buffers
5353                        .get(&buffer_id)
5354                        .cloned()
5355                        .flatten()
5356                })
5357            {
5358                let file = payload.file.ok_or_else(|| anyhow!("invalid file"))?;
5359                let worktree = this
5360                    .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
5361                    .ok_or_else(|| anyhow!("no such worktree"))?;
5362                let file = File::from_proto(file, worktree, cx)?;
5363                buffer.update(cx, |buffer, cx| {
5364                    buffer.file_updated(Arc::new(file), cx).detach();
5365                });
5366                this.detect_language_for_buffer(&buffer, cx);
5367            }
5368            Ok(())
5369        })
5370    }
5371
5372    async fn handle_save_buffer(
5373        this: ModelHandle<Self>,
5374        envelope: TypedEnvelope<proto::SaveBuffer>,
5375        _: Arc<Client>,
5376        mut cx: AsyncAppContext,
5377    ) -> Result<proto::BufferSaved> {
5378        let buffer_id = envelope.payload.buffer_id;
5379        let (project_id, buffer) = this.update(&mut cx, |this, cx| {
5380            let project_id = this.remote_id().ok_or_else(|| anyhow!("not connected"))?;
5381            let buffer = this
5382                .opened_buffers
5383                .get(&buffer_id)
5384                .and_then(|buffer| buffer.upgrade(cx))
5385                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?;
5386            anyhow::Ok((project_id, buffer))
5387        })?;
5388        buffer
5389            .update(&mut cx, |buffer, _| {
5390                buffer.wait_for_version(deserialize_version(&envelope.payload.version))
5391            })
5392            .await?;
5393        let buffer_id = buffer.read_with(&cx, |buffer, _| buffer.remote_id());
5394
5395        let (saved_version, fingerprint, mtime) = this
5396            .update(&mut cx, |this, cx| this.save_buffer(buffer, cx))
5397            .await?;
5398        Ok(proto::BufferSaved {
5399            project_id,
5400            buffer_id,
5401            version: serialize_version(&saved_version),
5402            mtime: Some(mtime.into()),
5403            fingerprint: language::proto::serialize_fingerprint(fingerprint),
5404        })
5405    }
5406
5407    async fn handle_reload_buffers(
5408        this: ModelHandle<Self>,
5409        envelope: TypedEnvelope<proto::ReloadBuffers>,
5410        _: Arc<Client>,
5411        mut cx: AsyncAppContext,
5412    ) -> Result<proto::ReloadBuffersResponse> {
5413        let sender_id = envelope.original_sender_id()?;
5414        let reload = this.update(&mut cx, |this, cx| {
5415            let mut buffers = HashSet::default();
5416            for buffer_id in &envelope.payload.buffer_ids {
5417                buffers.insert(
5418                    this.opened_buffers
5419                        .get(buffer_id)
5420                        .and_then(|buffer| buffer.upgrade(cx))
5421                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
5422                );
5423            }
5424            Ok::<_, anyhow::Error>(this.reload_buffers(buffers, false, cx))
5425        })?;
5426
5427        let project_transaction = reload.await?;
5428        let project_transaction = this.update(&mut cx, |this, cx| {
5429            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5430        });
5431        Ok(proto::ReloadBuffersResponse {
5432            transaction: Some(project_transaction),
5433        })
5434    }
5435
5436    async fn handle_synchronize_buffers(
5437        this: ModelHandle<Self>,
5438        envelope: TypedEnvelope<proto::SynchronizeBuffers>,
5439        _: Arc<Client>,
5440        mut cx: AsyncAppContext,
5441    ) -> Result<proto::SynchronizeBuffersResponse> {
5442        let project_id = envelope.payload.project_id;
5443        let mut response = proto::SynchronizeBuffersResponse {
5444            buffers: Default::default(),
5445        };
5446
5447        this.update(&mut cx, |this, cx| {
5448            let Some(guest_id) = envelope.original_sender_id else {
5449                log::error!("missing original_sender_id on SynchronizeBuffers request");
5450                return;
5451            };
5452
5453            this.shared_buffers.entry(guest_id).or_default().clear();
5454            for buffer in envelope.payload.buffers {
5455                let buffer_id = buffer.id;
5456                let remote_version = language::proto::deserialize_version(&buffer.version);
5457                if let Some(buffer) = this.buffer_for_id(buffer_id, cx) {
5458                    this.shared_buffers
5459                        .entry(guest_id)
5460                        .or_default()
5461                        .insert(buffer_id);
5462
5463                    let buffer = buffer.read(cx);
5464                    response.buffers.push(proto::BufferVersion {
5465                        id: buffer_id,
5466                        version: language::proto::serialize_version(&buffer.version),
5467                    });
5468
5469                    let operations = buffer.serialize_ops(Some(remote_version), cx);
5470                    let client = this.client.clone();
5471                    if let Some(file) = buffer.file() {
5472                        client
5473                            .send(proto::UpdateBufferFile {
5474                                project_id,
5475                                buffer_id: buffer_id as u64,
5476                                file: Some(file.to_proto()),
5477                            })
5478                            .log_err();
5479                    }
5480
5481                    client
5482                        .send(proto::UpdateDiffBase {
5483                            project_id,
5484                            buffer_id: buffer_id as u64,
5485                            diff_base: buffer.diff_base().map(Into::into),
5486                        })
5487                        .log_err();
5488
5489                    client
5490                        .send(proto::BufferReloaded {
5491                            project_id,
5492                            buffer_id,
5493                            version: language::proto::serialize_version(buffer.saved_version()),
5494                            mtime: Some(buffer.saved_mtime().into()),
5495                            fingerprint: language::proto::serialize_fingerprint(
5496                                buffer.saved_version_fingerprint(),
5497                            ),
5498                            line_ending: language::proto::serialize_line_ending(
5499                                buffer.line_ending(),
5500                            ) as i32,
5501                        })
5502                        .log_err();
5503
5504                    cx.background()
5505                        .spawn(
5506                            async move {
5507                                let operations = operations.await;
5508                                for chunk in split_operations(operations) {
5509                                    client
5510                                        .request(proto::UpdateBuffer {
5511                                            project_id,
5512                                            buffer_id,
5513                                            operations: chunk,
5514                                        })
5515                                        .await?;
5516                                }
5517                                anyhow::Ok(())
5518                            }
5519                            .log_err(),
5520                        )
5521                        .detach();
5522                }
5523            }
5524        });
5525
5526        Ok(response)
5527    }
5528
5529    async fn handle_format_buffers(
5530        this: ModelHandle<Self>,
5531        envelope: TypedEnvelope<proto::FormatBuffers>,
5532        _: Arc<Client>,
5533        mut cx: AsyncAppContext,
5534    ) -> Result<proto::FormatBuffersResponse> {
5535        let sender_id = envelope.original_sender_id()?;
5536        let format = this.update(&mut cx, |this, cx| {
5537            let mut buffers = HashSet::default();
5538            for buffer_id in &envelope.payload.buffer_ids {
5539                buffers.insert(
5540                    this.opened_buffers
5541                        .get(buffer_id)
5542                        .and_then(|buffer| buffer.upgrade(cx))
5543                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
5544                );
5545            }
5546            let trigger = FormatTrigger::from_proto(envelope.payload.trigger);
5547            Ok::<_, anyhow::Error>(this.format(buffers, false, trigger, cx))
5548        })?;
5549
5550        let project_transaction = format.await?;
5551        let project_transaction = this.update(&mut cx, |this, cx| {
5552            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5553        });
5554        Ok(proto::FormatBuffersResponse {
5555            transaction: Some(project_transaction),
5556        })
5557    }
5558
5559    async fn handle_apply_additional_edits_for_completion(
5560        this: ModelHandle<Self>,
5561        envelope: TypedEnvelope<proto::ApplyCompletionAdditionalEdits>,
5562        _: Arc<Client>,
5563        mut cx: AsyncAppContext,
5564    ) -> Result<proto::ApplyCompletionAdditionalEditsResponse> {
5565        let (buffer, completion) = this.update(&mut cx, |this, cx| {
5566            let buffer = this
5567                .opened_buffers
5568                .get(&envelope.payload.buffer_id)
5569                .and_then(|buffer| buffer.upgrade(cx))
5570                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
5571            let language = buffer.read(cx).language();
5572            let completion = language::proto::deserialize_completion(
5573                envelope
5574                    .payload
5575                    .completion
5576                    .ok_or_else(|| anyhow!("invalid completion"))?,
5577                language.cloned(),
5578            );
5579            Ok::<_, anyhow::Error>((buffer, completion))
5580        })?;
5581
5582        let completion = completion.await?;
5583
5584        let apply_additional_edits = this.update(&mut cx, |this, cx| {
5585            this.apply_additional_edits_for_completion(buffer, completion, false, cx)
5586        });
5587
5588        Ok(proto::ApplyCompletionAdditionalEditsResponse {
5589            transaction: apply_additional_edits
5590                .await?
5591                .as_ref()
5592                .map(language::proto::serialize_transaction),
5593        })
5594    }
5595
5596    async fn handle_apply_code_action(
5597        this: ModelHandle<Self>,
5598        envelope: TypedEnvelope<proto::ApplyCodeAction>,
5599        _: Arc<Client>,
5600        mut cx: AsyncAppContext,
5601    ) -> Result<proto::ApplyCodeActionResponse> {
5602        let sender_id = envelope.original_sender_id()?;
5603        let action = language::proto::deserialize_code_action(
5604            envelope
5605                .payload
5606                .action
5607                .ok_or_else(|| anyhow!("invalid action"))?,
5608        )?;
5609        let apply_code_action = this.update(&mut cx, |this, cx| {
5610            let buffer = this
5611                .opened_buffers
5612                .get(&envelope.payload.buffer_id)
5613                .and_then(|buffer| buffer.upgrade(cx))
5614                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
5615            Ok::<_, anyhow::Error>(this.apply_code_action(buffer, action, false, cx))
5616        })?;
5617
5618        let project_transaction = apply_code_action.await?;
5619        let project_transaction = this.update(&mut cx, |this, cx| {
5620            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5621        });
5622        Ok(proto::ApplyCodeActionResponse {
5623            transaction: Some(project_transaction),
5624        })
5625    }
5626
5627    async fn handle_lsp_command<T: LspCommand>(
5628        this: ModelHandle<Self>,
5629        envelope: TypedEnvelope<T::ProtoRequest>,
5630        _: Arc<Client>,
5631        mut cx: AsyncAppContext,
5632    ) -> Result<<T::ProtoRequest as proto::RequestMessage>::Response>
5633    where
5634        <T::LspRequest as lsp::request::Request>::Result: Send,
5635    {
5636        let sender_id = envelope.original_sender_id()?;
5637        let buffer_id = T::buffer_id_from_proto(&envelope.payload);
5638        let buffer_handle = this.read_with(&cx, |this, _| {
5639            this.opened_buffers
5640                .get(&buffer_id)
5641                .and_then(|buffer| buffer.upgrade(&cx))
5642                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))
5643        })?;
5644        let request = T::from_proto(
5645            envelope.payload,
5646            this.clone(),
5647            buffer_handle.clone(),
5648            cx.clone(),
5649        )
5650        .await?;
5651        let buffer_version = buffer_handle.read_with(&cx, |buffer, _| buffer.version());
5652        let response = this
5653            .update(&mut cx, |this, cx| {
5654                this.request_lsp(buffer_handle, request, cx)
5655            })
5656            .await?;
5657        this.update(&mut cx, |this, cx| {
5658            Ok(T::response_to_proto(
5659                response,
5660                this,
5661                sender_id,
5662                &buffer_version,
5663                cx,
5664            ))
5665        })
5666    }
5667
5668    async fn handle_get_project_symbols(
5669        this: ModelHandle<Self>,
5670        envelope: TypedEnvelope<proto::GetProjectSymbols>,
5671        _: Arc<Client>,
5672        mut cx: AsyncAppContext,
5673    ) -> Result<proto::GetProjectSymbolsResponse> {
5674        let symbols = this
5675            .update(&mut cx, |this, cx| {
5676                this.symbols(&envelope.payload.query, cx)
5677            })
5678            .await?;
5679
5680        Ok(proto::GetProjectSymbolsResponse {
5681            symbols: symbols.iter().map(serialize_symbol).collect(),
5682        })
5683    }
5684
5685    async fn handle_search_project(
5686        this: ModelHandle<Self>,
5687        envelope: TypedEnvelope<proto::SearchProject>,
5688        _: Arc<Client>,
5689        mut cx: AsyncAppContext,
5690    ) -> Result<proto::SearchProjectResponse> {
5691        let peer_id = envelope.original_sender_id()?;
5692        let query = SearchQuery::from_proto(envelope.payload)?;
5693        let result = this
5694            .update(&mut cx, |this, cx| this.search(query, cx))
5695            .await?;
5696
5697        this.update(&mut cx, |this, cx| {
5698            let mut locations = Vec::new();
5699            for (buffer, ranges) in result {
5700                for range in ranges {
5701                    let start = serialize_anchor(&range.start);
5702                    let end = serialize_anchor(&range.end);
5703                    let buffer_id = this.create_buffer_for_peer(&buffer, peer_id, cx);
5704                    locations.push(proto::Location {
5705                        buffer_id,
5706                        start: Some(start),
5707                        end: Some(end),
5708                    });
5709                }
5710            }
5711            Ok(proto::SearchProjectResponse { locations })
5712        })
5713    }
5714
5715    async fn handle_open_buffer_for_symbol(
5716        this: ModelHandle<Self>,
5717        envelope: TypedEnvelope<proto::OpenBufferForSymbol>,
5718        _: Arc<Client>,
5719        mut cx: AsyncAppContext,
5720    ) -> Result<proto::OpenBufferForSymbolResponse> {
5721        let peer_id = envelope.original_sender_id()?;
5722        let symbol = envelope
5723            .payload
5724            .symbol
5725            .ok_or_else(|| anyhow!("invalid symbol"))?;
5726        let symbol = this
5727            .read_with(&cx, |this, _| this.deserialize_symbol(symbol))
5728            .await?;
5729        let symbol = this.read_with(&cx, |this, _| {
5730            let signature = this.symbol_signature(&symbol.path);
5731            if signature == symbol.signature {
5732                Ok(symbol)
5733            } else {
5734                Err(anyhow!("invalid symbol signature"))
5735            }
5736        })?;
5737        let buffer = this
5738            .update(&mut cx, |this, cx| this.open_buffer_for_symbol(&symbol, cx))
5739            .await?;
5740
5741        Ok(proto::OpenBufferForSymbolResponse {
5742            buffer_id: this.update(&mut cx, |this, cx| {
5743                this.create_buffer_for_peer(&buffer, peer_id, cx)
5744            }),
5745        })
5746    }
5747
5748    fn symbol_signature(&self, project_path: &ProjectPath) -> [u8; 32] {
5749        let mut hasher = Sha256::new();
5750        hasher.update(project_path.worktree_id.to_proto().to_be_bytes());
5751        hasher.update(project_path.path.to_string_lossy().as_bytes());
5752        hasher.update(self.nonce.to_be_bytes());
5753        hasher.finalize().as_slice().try_into().unwrap()
5754    }
5755
5756    async fn handle_open_buffer_by_id(
5757        this: ModelHandle<Self>,
5758        envelope: TypedEnvelope<proto::OpenBufferById>,
5759        _: Arc<Client>,
5760        mut cx: AsyncAppContext,
5761    ) -> Result<proto::OpenBufferResponse> {
5762        let peer_id = envelope.original_sender_id()?;
5763        let buffer = this
5764            .update(&mut cx, |this, cx| {
5765                this.open_buffer_by_id(envelope.payload.id, cx)
5766            })
5767            .await?;
5768        this.update(&mut cx, |this, cx| {
5769            Ok(proto::OpenBufferResponse {
5770                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
5771            })
5772        })
5773    }
5774
5775    async fn handle_open_buffer_by_path(
5776        this: ModelHandle<Self>,
5777        envelope: TypedEnvelope<proto::OpenBufferByPath>,
5778        _: Arc<Client>,
5779        mut cx: AsyncAppContext,
5780    ) -> Result<proto::OpenBufferResponse> {
5781        let peer_id = envelope.original_sender_id()?;
5782        let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
5783        let open_buffer = this.update(&mut cx, |this, cx| {
5784            this.open_buffer(
5785                ProjectPath {
5786                    worktree_id,
5787                    path: PathBuf::from(envelope.payload.path).into(),
5788                },
5789                cx,
5790            )
5791        });
5792
5793        let buffer = open_buffer.await?;
5794        this.update(&mut cx, |this, cx| {
5795            Ok(proto::OpenBufferResponse {
5796                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
5797            })
5798        })
5799    }
5800
5801    fn serialize_project_transaction_for_peer(
5802        &mut self,
5803        project_transaction: ProjectTransaction,
5804        peer_id: proto::PeerId,
5805        cx: &mut AppContext,
5806    ) -> proto::ProjectTransaction {
5807        let mut serialized_transaction = proto::ProjectTransaction {
5808            buffer_ids: Default::default(),
5809            transactions: Default::default(),
5810        };
5811        for (buffer, transaction) in project_transaction.0 {
5812            serialized_transaction
5813                .buffer_ids
5814                .push(self.create_buffer_for_peer(&buffer, peer_id, cx));
5815            serialized_transaction
5816                .transactions
5817                .push(language::proto::serialize_transaction(&transaction));
5818        }
5819        serialized_transaction
5820    }
5821
5822    fn deserialize_project_transaction(
5823        &mut self,
5824        message: proto::ProjectTransaction,
5825        push_to_history: bool,
5826        cx: &mut ModelContext<Self>,
5827    ) -> Task<Result<ProjectTransaction>> {
5828        cx.spawn(|this, mut cx| async move {
5829            let mut project_transaction = ProjectTransaction::default();
5830            for (buffer_id, transaction) in message.buffer_ids.into_iter().zip(message.transactions)
5831            {
5832                let buffer = this
5833                    .update(&mut cx, |this, cx| {
5834                        this.wait_for_remote_buffer(buffer_id, cx)
5835                    })
5836                    .await?;
5837                let transaction = language::proto::deserialize_transaction(transaction)?;
5838                project_transaction.0.insert(buffer, transaction);
5839            }
5840
5841            for (buffer, transaction) in &project_transaction.0 {
5842                buffer
5843                    .update(&mut cx, |buffer, _| {
5844                        buffer.wait_for_edits(transaction.edit_ids.iter().copied())
5845                    })
5846                    .await?;
5847
5848                if push_to_history {
5849                    buffer.update(&mut cx, |buffer, _| {
5850                        buffer.push_transaction(transaction.clone(), Instant::now());
5851                    });
5852                }
5853            }
5854
5855            Ok(project_transaction)
5856        })
5857    }
5858
5859    fn create_buffer_for_peer(
5860        &mut self,
5861        buffer: &ModelHandle<Buffer>,
5862        peer_id: proto::PeerId,
5863        cx: &mut AppContext,
5864    ) -> u64 {
5865        let buffer_id = buffer.read(cx).remote_id();
5866        if let Some(ProjectClientState::Local { updates_tx, .. }) = &self.client_state {
5867            updates_tx
5868                .unbounded_send(LocalProjectUpdate::CreateBufferForPeer { peer_id, buffer_id })
5869                .ok();
5870        }
5871        buffer_id
5872    }
5873
5874    fn wait_for_remote_buffer(
5875        &mut self,
5876        id: u64,
5877        cx: &mut ModelContext<Self>,
5878    ) -> Task<Result<ModelHandle<Buffer>>> {
5879        let mut opened_buffer_rx = self.opened_buffer.1.clone();
5880
5881        cx.spawn_weak(|this, mut cx| async move {
5882            let buffer = loop {
5883                let Some(this) = this.upgrade(&cx) else {
5884                    return Err(anyhow!("project dropped"));
5885                };
5886                let buffer = this.read_with(&cx, |this, cx| {
5887                    this.opened_buffers
5888                        .get(&id)
5889                        .and_then(|buffer| buffer.upgrade(cx))
5890                });
5891                if let Some(buffer) = buffer {
5892                    break buffer;
5893                } else if this.read_with(&cx, |this, _| this.is_read_only()) {
5894                    return Err(anyhow!("disconnected before buffer {} could be opened", id));
5895                }
5896
5897                this.update(&mut cx, |this, _| {
5898                    this.incomplete_remote_buffers.entry(id).or_default();
5899                });
5900                drop(this);
5901                opened_buffer_rx
5902                    .next()
5903                    .await
5904                    .ok_or_else(|| anyhow!("project dropped while waiting for buffer"))?;
5905            };
5906            buffer.update(&mut cx, |buffer, cx| buffer.git_diff_recalc(cx));
5907            Ok(buffer)
5908        })
5909    }
5910
5911    fn synchronize_remote_buffers(&mut self, cx: &mut ModelContext<Self>) -> Task<Result<()>> {
5912        let project_id = match self.client_state.as_ref() {
5913            Some(ProjectClientState::Remote {
5914                sharing_has_stopped,
5915                remote_id,
5916                ..
5917            }) => {
5918                if *sharing_has_stopped {
5919                    return Task::ready(Err(anyhow!(
5920                        "can't synchronize remote buffers on a readonly project"
5921                    )));
5922                } else {
5923                    *remote_id
5924                }
5925            }
5926            Some(ProjectClientState::Local { .. }) | None => {
5927                return Task::ready(Err(anyhow!(
5928                    "can't synchronize remote buffers on a local project"
5929                )))
5930            }
5931        };
5932
5933        let client = self.client.clone();
5934        cx.spawn(|this, cx| async move {
5935            let (buffers, incomplete_buffer_ids) = this.read_with(&cx, |this, cx| {
5936                let buffers = this
5937                    .opened_buffers
5938                    .iter()
5939                    .filter_map(|(id, buffer)| {
5940                        let buffer = buffer.upgrade(cx)?;
5941                        Some(proto::BufferVersion {
5942                            id: *id,
5943                            version: language::proto::serialize_version(&buffer.read(cx).version),
5944                        })
5945                    })
5946                    .collect();
5947                let incomplete_buffer_ids = this
5948                    .incomplete_remote_buffers
5949                    .keys()
5950                    .copied()
5951                    .collect::<Vec<_>>();
5952
5953                (buffers, incomplete_buffer_ids)
5954            });
5955            let response = client
5956                .request(proto::SynchronizeBuffers {
5957                    project_id,
5958                    buffers,
5959                })
5960                .await?;
5961
5962            let send_updates_for_buffers = response.buffers.into_iter().map(|buffer| {
5963                let client = client.clone();
5964                let buffer_id = buffer.id;
5965                let remote_version = language::proto::deserialize_version(&buffer.version);
5966                this.read_with(&cx, |this, cx| {
5967                    if let Some(buffer) = this.buffer_for_id(buffer_id, cx) {
5968                        let operations = buffer.read(cx).serialize_ops(Some(remote_version), cx);
5969                        cx.background().spawn(async move {
5970                            let operations = operations.await;
5971                            for chunk in split_operations(operations) {
5972                                client
5973                                    .request(proto::UpdateBuffer {
5974                                        project_id,
5975                                        buffer_id,
5976                                        operations: chunk,
5977                                    })
5978                                    .await?;
5979                            }
5980                            anyhow::Ok(())
5981                        })
5982                    } else {
5983                        Task::ready(Ok(()))
5984                    }
5985                })
5986            });
5987
5988            // Any incomplete buffers have open requests waiting. Request that the host sends
5989            // creates these buffers for us again to unblock any waiting futures.
5990            for id in incomplete_buffer_ids {
5991                cx.background()
5992                    .spawn(client.request(proto::OpenBufferById { project_id, id }))
5993                    .detach();
5994            }
5995
5996            futures::future::join_all(send_updates_for_buffers)
5997                .await
5998                .into_iter()
5999                .collect()
6000        })
6001    }
6002
6003    pub fn worktree_metadata_protos(&self, cx: &AppContext) -> Vec<proto::WorktreeMetadata> {
6004        self.worktrees(cx)
6005            .map(|worktree| {
6006                let worktree = worktree.read(cx);
6007                proto::WorktreeMetadata {
6008                    id: worktree.id().to_proto(),
6009                    root_name: worktree.root_name().into(),
6010                    visible: worktree.is_visible(),
6011                    abs_path: worktree.abs_path().to_string_lossy().into(),
6012                }
6013            })
6014            .collect()
6015    }
6016
6017    fn set_worktrees_from_proto(
6018        &mut self,
6019        worktrees: Vec<proto::WorktreeMetadata>,
6020        cx: &mut ModelContext<Project>,
6021    ) -> Result<()> {
6022        let replica_id = self.replica_id();
6023        let remote_id = self.remote_id().ok_or_else(|| anyhow!("invalid project"))?;
6024
6025        let mut old_worktrees_by_id = self
6026            .worktrees
6027            .drain(..)
6028            .filter_map(|worktree| {
6029                let worktree = worktree.upgrade(cx)?;
6030                Some((worktree.read(cx).id(), worktree))
6031            })
6032            .collect::<HashMap<_, _>>();
6033
6034        for worktree in worktrees {
6035            if let Some(old_worktree) =
6036                old_worktrees_by_id.remove(&WorktreeId::from_proto(worktree.id))
6037            {
6038                self.worktrees.push(WorktreeHandle::Strong(old_worktree));
6039            } else {
6040                let worktree =
6041                    Worktree::remote(remote_id, replica_id, worktree, self.client.clone(), cx);
6042                let _ = self.add_worktree(&worktree, cx);
6043            }
6044        }
6045
6046        self.metadata_changed(cx);
6047        for (id, _) in old_worktrees_by_id {
6048            cx.emit(Event::WorktreeRemoved(id));
6049        }
6050
6051        Ok(())
6052    }
6053
6054    fn set_collaborators_from_proto(
6055        &mut self,
6056        messages: Vec<proto::Collaborator>,
6057        cx: &mut ModelContext<Self>,
6058    ) -> Result<()> {
6059        let mut collaborators = HashMap::default();
6060        for message in messages {
6061            let collaborator = Collaborator::from_proto(message)?;
6062            collaborators.insert(collaborator.peer_id, collaborator);
6063        }
6064        for old_peer_id in self.collaborators.keys() {
6065            if !collaborators.contains_key(old_peer_id) {
6066                cx.emit(Event::CollaboratorLeft(*old_peer_id));
6067            }
6068        }
6069        self.collaborators = collaborators;
6070        Ok(())
6071    }
6072
6073    fn deserialize_symbol(
6074        &self,
6075        serialized_symbol: proto::Symbol,
6076    ) -> impl Future<Output = Result<Symbol>> {
6077        let languages = self.languages.clone();
6078        async move {
6079            let source_worktree_id = WorktreeId::from_proto(serialized_symbol.source_worktree_id);
6080            let worktree_id = WorktreeId::from_proto(serialized_symbol.worktree_id);
6081            let start = serialized_symbol
6082                .start
6083                .ok_or_else(|| anyhow!("invalid start"))?;
6084            let end = serialized_symbol
6085                .end
6086                .ok_or_else(|| anyhow!("invalid end"))?;
6087            let kind = unsafe { mem::transmute(serialized_symbol.kind) };
6088            let path = ProjectPath {
6089                worktree_id,
6090                path: PathBuf::from(serialized_symbol.path).into(),
6091            };
6092            let language = languages
6093                .language_for_file(&path.path, None)
6094                .await
6095                .log_err();
6096            Ok(Symbol {
6097                language_server_name: LanguageServerName(
6098                    serialized_symbol.language_server_name.into(),
6099                ),
6100                source_worktree_id,
6101                path,
6102                label: {
6103                    match language {
6104                        Some(language) => {
6105                            language
6106                                .label_for_symbol(&serialized_symbol.name, kind)
6107                                .await
6108                        }
6109                        None => None,
6110                    }
6111                    .unwrap_or_else(|| CodeLabel::plain(serialized_symbol.name.clone(), None))
6112                },
6113
6114                name: serialized_symbol.name,
6115                range: Unclipped(PointUtf16::new(start.row, start.column))
6116                    ..Unclipped(PointUtf16::new(end.row, end.column)),
6117                kind,
6118                signature: serialized_symbol
6119                    .signature
6120                    .try_into()
6121                    .map_err(|_| anyhow!("invalid signature"))?,
6122            })
6123        }
6124    }
6125
6126    async fn handle_buffer_saved(
6127        this: ModelHandle<Self>,
6128        envelope: TypedEnvelope<proto::BufferSaved>,
6129        _: Arc<Client>,
6130        mut cx: AsyncAppContext,
6131    ) -> Result<()> {
6132        let fingerprint = deserialize_fingerprint(&envelope.payload.fingerprint)?;
6133        let version = deserialize_version(&envelope.payload.version);
6134        let mtime = envelope
6135            .payload
6136            .mtime
6137            .ok_or_else(|| anyhow!("missing mtime"))?
6138            .into();
6139
6140        this.update(&mut cx, |this, cx| {
6141            let buffer = this
6142                .opened_buffers
6143                .get(&envelope.payload.buffer_id)
6144                .and_then(|buffer| buffer.upgrade(cx))
6145                .or_else(|| {
6146                    this.incomplete_remote_buffers
6147                        .get(&envelope.payload.buffer_id)
6148                        .and_then(|b| b.clone())
6149                });
6150            if let Some(buffer) = buffer {
6151                buffer.update(cx, |buffer, cx| {
6152                    buffer.did_save(version, fingerprint, mtime, cx);
6153                });
6154            }
6155            Ok(())
6156        })
6157    }
6158
6159    async fn handle_buffer_reloaded(
6160        this: ModelHandle<Self>,
6161        envelope: TypedEnvelope<proto::BufferReloaded>,
6162        _: Arc<Client>,
6163        mut cx: AsyncAppContext,
6164    ) -> Result<()> {
6165        let payload = envelope.payload;
6166        let version = deserialize_version(&payload.version);
6167        let fingerprint = deserialize_fingerprint(&payload.fingerprint)?;
6168        let line_ending = deserialize_line_ending(
6169            proto::LineEnding::from_i32(payload.line_ending)
6170                .ok_or_else(|| anyhow!("missing line ending"))?,
6171        );
6172        let mtime = payload
6173            .mtime
6174            .ok_or_else(|| anyhow!("missing mtime"))?
6175            .into();
6176        this.update(&mut cx, |this, cx| {
6177            let buffer = this
6178                .opened_buffers
6179                .get(&payload.buffer_id)
6180                .and_then(|buffer| buffer.upgrade(cx))
6181                .or_else(|| {
6182                    this.incomplete_remote_buffers
6183                        .get(&payload.buffer_id)
6184                        .cloned()
6185                        .flatten()
6186                });
6187            if let Some(buffer) = buffer {
6188                buffer.update(cx, |buffer, cx| {
6189                    buffer.did_reload(version, fingerprint, line_ending, mtime, cx);
6190                });
6191            }
6192            Ok(())
6193        })
6194    }
6195
6196    #[allow(clippy::type_complexity)]
6197    fn edits_from_lsp(
6198        &mut self,
6199        buffer: &ModelHandle<Buffer>,
6200        lsp_edits: impl 'static + Send + IntoIterator<Item = lsp::TextEdit>,
6201        server_id: LanguageServerId,
6202        version: Option<i32>,
6203        cx: &mut ModelContext<Self>,
6204    ) -> Task<Result<Vec<(Range<Anchor>, String)>>> {
6205        let snapshot = self.buffer_snapshot_for_lsp_version(buffer, server_id, version, cx);
6206        cx.background().spawn(async move {
6207            let snapshot = snapshot?;
6208            let mut lsp_edits = lsp_edits
6209                .into_iter()
6210                .map(|edit| (range_from_lsp(edit.range), edit.new_text))
6211                .collect::<Vec<_>>();
6212            lsp_edits.sort_by_key(|(range, _)| range.start);
6213
6214            let mut lsp_edits = lsp_edits.into_iter().peekable();
6215            let mut edits = Vec::new();
6216            while let Some((range, mut new_text)) = lsp_edits.next() {
6217                // Clip invalid ranges provided by the language server.
6218                let mut range = snapshot.clip_point_utf16(range.start, Bias::Left)
6219                    ..snapshot.clip_point_utf16(range.end, Bias::Left);
6220
6221                // Combine any LSP edits that are adjacent.
6222                //
6223                // Also, combine LSP edits that are separated from each other by only
6224                // a newline. This is important because for some code actions,
6225                // Rust-analyzer rewrites the entire buffer via a series of edits that
6226                // are separated by unchanged newline characters.
6227                //
6228                // In order for the diffing logic below to work properly, any edits that
6229                // cancel each other out must be combined into one.
6230                while let Some((next_range, next_text)) = lsp_edits.peek() {
6231                    if next_range.start.0 > range.end {
6232                        if next_range.start.0.row > range.end.row + 1
6233                            || next_range.start.0.column > 0
6234                            || snapshot.clip_point_utf16(
6235                                Unclipped(PointUtf16::new(range.end.row, u32::MAX)),
6236                                Bias::Left,
6237                            ) > range.end
6238                        {
6239                            break;
6240                        }
6241                        new_text.push('\n');
6242                    }
6243                    range.end = snapshot.clip_point_utf16(next_range.end, Bias::Left);
6244                    new_text.push_str(next_text);
6245                    lsp_edits.next();
6246                }
6247
6248                // For multiline edits, perform a diff of the old and new text so that
6249                // we can identify the changes more precisely, preserving the locations
6250                // of any anchors positioned in the unchanged regions.
6251                if range.end.row > range.start.row {
6252                    let mut offset = range.start.to_offset(&snapshot);
6253                    let old_text = snapshot.text_for_range(range).collect::<String>();
6254
6255                    let diff = TextDiff::from_lines(old_text.as_str(), &new_text);
6256                    let mut moved_since_edit = true;
6257                    for change in diff.iter_all_changes() {
6258                        let tag = change.tag();
6259                        let value = change.value();
6260                        match tag {
6261                            ChangeTag::Equal => {
6262                                offset += value.len();
6263                                moved_since_edit = true;
6264                            }
6265                            ChangeTag::Delete => {
6266                                let start = snapshot.anchor_after(offset);
6267                                let end = snapshot.anchor_before(offset + value.len());
6268                                if moved_since_edit {
6269                                    edits.push((start..end, String::new()));
6270                                } else {
6271                                    edits.last_mut().unwrap().0.end = end;
6272                                }
6273                                offset += value.len();
6274                                moved_since_edit = false;
6275                            }
6276                            ChangeTag::Insert => {
6277                                if moved_since_edit {
6278                                    let anchor = snapshot.anchor_after(offset);
6279                                    edits.push((anchor..anchor, value.to_string()));
6280                                } else {
6281                                    edits.last_mut().unwrap().1.push_str(value);
6282                                }
6283                                moved_since_edit = false;
6284                            }
6285                        }
6286                    }
6287                } else if range.end == range.start {
6288                    let anchor = snapshot.anchor_after(range.start);
6289                    edits.push((anchor..anchor, new_text));
6290                } else {
6291                    let edit_start = snapshot.anchor_after(range.start);
6292                    let edit_end = snapshot.anchor_before(range.end);
6293                    edits.push((edit_start..edit_end, new_text));
6294                }
6295            }
6296
6297            Ok(edits)
6298        })
6299    }
6300
6301    fn buffer_snapshot_for_lsp_version(
6302        &mut self,
6303        buffer: &ModelHandle<Buffer>,
6304        server_id: LanguageServerId,
6305        version: Option<i32>,
6306        cx: &AppContext,
6307    ) -> Result<TextBufferSnapshot> {
6308        const OLD_VERSIONS_TO_RETAIN: i32 = 10;
6309
6310        if let Some(version) = version {
6311            let buffer_id = buffer.read(cx).remote_id();
6312            let snapshots = self
6313                .buffer_snapshots
6314                .get_mut(&buffer_id)
6315                .and_then(|m| m.get_mut(&server_id))
6316                .ok_or_else(|| {
6317                    anyhow!("no snapshots found for buffer {buffer_id} and server {server_id}")
6318                })?;
6319
6320            let found_snapshot = snapshots
6321                .binary_search_by_key(&version, |e| e.version)
6322                .map(|ix| snapshots[ix].snapshot.clone())
6323                .map_err(|_| {
6324                    anyhow!("snapshot not found for buffer {buffer_id} server {server_id} at version {version}")
6325                })?;
6326
6327            snapshots.retain(|snapshot| snapshot.version + OLD_VERSIONS_TO_RETAIN >= version);
6328            Ok(found_snapshot)
6329        } else {
6330            Ok((buffer.read(cx)).text_snapshot())
6331        }
6332    }
6333
6334    pub fn language_servers(
6335        &self,
6336    ) -> impl '_ + Iterator<Item = (LanguageServerId, LanguageServerName, WorktreeId)> {
6337        self.language_server_ids
6338            .iter()
6339            .map(|((worktree_id, server_name), server_id)| {
6340                (*server_id, server_name.clone(), *worktree_id)
6341            })
6342    }
6343
6344    pub fn language_server_for_id(&self, id: LanguageServerId) -> Option<Arc<LanguageServer>> {
6345        if let LanguageServerState::Running { server, .. } = self.language_servers.get(&id)? {
6346            Some(server.clone())
6347        } else {
6348            None
6349        }
6350    }
6351
6352    pub fn language_servers_for_buffer(
6353        &self,
6354        buffer: &Buffer,
6355        cx: &AppContext,
6356    ) -> impl Iterator<Item = (&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
6357        self.language_server_ids_for_buffer(buffer, cx)
6358            .into_iter()
6359            .filter_map(|server_id| {
6360                let server = self.language_servers.get(&server_id)?;
6361                if let LanguageServerState::Running {
6362                    adapter, server, ..
6363                } = server
6364                {
6365                    Some((adapter, server))
6366                } else {
6367                    None
6368                }
6369            })
6370    }
6371
6372    fn primary_language_servers_for_buffer(
6373        &self,
6374        buffer: &Buffer,
6375        cx: &AppContext,
6376    ) -> Option<(&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
6377        self.language_servers_for_buffer(buffer, cx).next()
6378    }
6379
6380    fn language_server_for_buffer(
6381        &self,
6382        buffer: &Buffer,
6383        server_id: LanguageServerId,
6384        cx: &AppContext,
6385    ) -> Option<(&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
6386        self.language_servers_for_buffer(buffer, cx)
6387            .find(|(_, s)| s.server_id() == server_id)
6388    }
6389
6390    fn language_server_ids_for_buffer(
6391        &self,
6392        buffer: &Buffer,
6393        cx: &AppContext,
6394    ) -> Vec<LanguageServerId> {
6395        if let Some((file, language)) = File::from_dyn(buffer.file()).zip(buffer.language()) {
6396            let worktree_id = file.worktree_id(cx);
6397            language
6398                .lsp_adapters()
6399                .iter()
6400                .flat_map(|adapter| {
6401                    let key = (worktree_id, adapter.name.clone());
6402                    self.language_server_ids.get(&key).copied()
6403                })
6404                .collect()
6405        } else {
6406            Vec::new()
6407        }
6408    }
6409}
6410
6411impl WorktreeHandle {
6412    pub fn upgrade(&self, cx: &AppContext) -> Option<ModelHandle<Worktree>> {
6413        match self {
6414            WorktreeHandle::Strong(handle) => Some(handle.clone()),
6415            WorktreeHandle::Weak(handle) => handle.upgrade(cx),
6416        }
6417    }
6418}
6419
6420impl OpenBuffer {
6421    pub fn upgrade(&self, cx: &impl UpgradeModelHandle) -> Option<ModelHandle<Buffer>> {
6422        match self {
6423            OpenBuffer::Strong(handle) => Some(handle.clone()),
6424            OpenBuffer::Weak(handle) => handle.upgrade(cx),
6425            OpenBuffer::Operations(_) => None,
6426        }
6427    }
6428}
6429
6430pub struct PathMatchCandidateSet {
6431    pub snapshot: Snapshot,
6432    pub include_ignored: bool,
6433    pub include_root_name: bool,
6434}
6435
6436impl<'a> fuzzy::PathMatchCandidateSet<'a> for PathMatchCandidateSet {
6437    type Candidates = PathMatchCandidateSetIter<'a>;
6438
6439    fn id(&self) -> usize {
6440        self.snapshot.id().to_usize()
6441    }
6442
6443    fn len(&self) -> usize {
6444        if self.include_ignored {
6445            self.snapshot.file_count()
6446        } else {
6447            self.snapshot.visible_file_count()
6448        }
6449    }
6450
6451    fn prefix(&self) -> Arc<str> {
6452        if self.snapshot.root_entry().map_or(false, |e| e.is_file()) {
6453            self.snapshot.root_name().into()
6454        } else if self.include_root_name {
6455            format!("{}/", self.snapshot.root_name()).into()
6456        } else {
6457            "".into()
6458        }
6459    }
6460
6461    fn candidates(&'a self, start: usize) -> Self::Candidates {
6462        PathMatchCandidateSetIter {
6463            traversal: self.snapshot.files(self.include_ignored, start),
6464        }
6465    }
6466}
6467
6468pub struct PathMatchCandidateSetIter<'a> {
6469    traversal: Traversal<'a>,
6470}
6471
6472impl<'a> Iterator for PathMatchCandidateSetIter<'a> {
6473    type Item = fuzzy::PathMatchCandidate<'a>;
6474
6475    fn next(&mut self) -> Option<Self::Item> {
6476        self.traversal.next().map(|entry| {
6477            if let EntryKind::File(char_bag) = entry.kind {
6478                fuzzy::PathMatchCandidate {
6479                    path: &entry.path,
6480                    char_bag,
6481                }
6482            } else {
6483                unreachable!()
6484            }
6485        })
6486    }
6487}
6488
6489impl Entity for Project {
6490    type Event = Event;
6491
6492    fn release(&mut self, cx: &mut gpui::AppContext) {
6493        match &self.client_state {
6494            Some(ProjectClientState::Local { .. }) => {
6495                let _ = self.unshare_internal(cx);
6496            }
6497            Some(ProjectClientState::Remote { remote_id, .. }) => {
6498                let _ = self.client.send(proto::LeaveProject {
6499                    project_id: *remote_id,
6500                });
6501                self.disconnected_from_host_internal(cx);
6502            }
6503            _ => {}
6504        }
6505    }
6506
6507    fn app_will_quit(
6508        &mut self,
6509        _: &mut AppContext,
6510    ) -> Option<std::pin::Pin<Box<dyn 'static + Future<Output = ()>>>> {
6511        let shutdown_futures = self
6512            .language_servers
6513            .drain()
6514            .map(|(_, server_state)| async {
6515                match server_state {
6516                    LanguageServerState::Running { server, .. } => server.shutdown()?.await,
6517                    LanguageServerState::Starting(starting_server) => {
6518                        starting_server.await?.shutdown()?.await
6519                    }
6520                }
6521            })
6522            .collect::<Vec<_>>();
6523
6524        Some(
6525            async move {
6526                futures::future::join_all(shutdown_futures).await;
6527            }
6528            .boxed(),
6529        )
6530    }
6531}
6532
6533impl Collaborator {
6534    fn from_proto(message: proto::Collaborator) -> Result<Self> {
6535        Ok(Self {
6536            peer_id: message.peer_id.ok_or_else(|| anyhow!("invalid peer id"))?,
6537            replica_id: message.replica_id as ReplicaId,
6538        })
6539    }
6540}
6541
6542impl<P: AsRef<Path>> From<(WorktreeId, P)> for ProjectPath {
6543    fn from((worktree_id, path): (WorktreeId, P)) -> Self {
6544        Self {
6545            worktree_id,
6546            path: path.as_ref().into(),
6547        }
6548    }
6549}
6550
6551fn split_operations(
6552    mut operations: Vec<proto::Operation>,
6553) -> impl Iterator<Item = Vec<proto::Operation>> {
6554    #[cfg(any(test, feature = "test-support"))]
6555    const CHUNK_SIZE: usize = 5;
6556
6557    #[cfg(not(any(test, feature = "test-support")))]
6558    const CHUNK_SIZE: usize = 100;
6559
6560    let mut done = false;
6561    std::iter::from_fn(move || {
6562        if done {
6563            return None;
6564        }
6565
6566        let operations = operations
6567            .drain(..cmp::min(CHUNK_SIZE, operations.len()))
6568            .collect::<Vec<_>>();
6569        if operations.is_empty() {
6570            done = true;
6571        }
6572        Some(operations)
6573    })
6574}
6575
6576fn serialize_symbol(symbol: &Symbol) -> proto::Symbol {
6577    proto::Symbol {
6578        language_server_name: symbol.language_server_name.0.to_string(),
6579        source_worktree_id: symbol.source_worktree_id.to_proto(),
6580        worktree_id: symbol.path.worktree_id.to_proto(),
6581        path: symbol.path.path.to_string_lossy().to_string(),
6582        name: symbol.name.clone(),
6583        kind: unsafe { mem::transmute(symbol.kind) },
6584        start: Some(proto::PointUtf16 {
6585            row: symbol.range.start.0.row,
6586            column: symbol.range.start.0.column,
6587        }),
6588        end: Some(proto::PointUtf16 {
6589            row: symbol.range.end.0.row,
6590            column: symbol.range.end.0.column,
6591        }),
6592        signature: symbol.signature.to_vec(),
6593    }
6594}
6595
6596fn relativize_path(base: &Path, path: &Path) -> PathBuf {
6597    let mut path_components = path.components();
6598    let mut base_components = base.components();
6599    let mut components: Vec<Component> = Vec::new();
6600    loop {
6601        match (path_components.next(), base_components.next()) {
6602            (None, None) => break,
6603            (Some(a), None) => {
6604                components.push(a);
6605                components.extend(path_components.by_ref());
6606                break;
6607            }
6608            (None, _) => components.push(Component::ParentDir),
6609            (Some(a), Some(b)) if components.is_empty() && a == b => (),
6610            (Some(a), Some(b)) if b == Component::CurDir => components.push(a),
6611            (Some(a), Some(_)) => {
6612                components.push(Component::ParentDir);
6613                for _ in base_components {
6614                    components.push(Component::ParentDir);
6615                }
6616                components.push(a);
6617                components.extend(path_components.by_ref());
6618                break;
6619            }
6620        }
6621    }
6622    components.iter().map(|c| c.as_os_str()).collect()
6623}
6624
6625impl Item for Buffer {
6626    fn entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId> {
6627        File::from_dyn(self.file()).and_then(|file| file.project_entry_id(cx))
6628    }
6629
6630    fn project_path(&self, cx: &AppContext) -> Option<ProjectPath> {
6631        File::from_dyn(self.file()).map(|file| ProjectPath {
6632            worktree_id: file.worktree_id(cx),
6633            path: file.path().clone(),
6634        })
6635    }
6636}