logiguard fork: GPUI xdg-activation keyboard-focus serial fix

Single-commit orphan branch: full zed-industries/zed @ 8c74db0 source tree
with a 3-file patch applied (no upstream history).

Patch (crates/gpui_linux/src/linux/wayland/):
  - serial.rs: add SerialKind::KeyboardEnter
  - client.rs: store wl_keyboard.enter serial; add latest_serial_of()
  - window.rs: activate() uses keyboard-enter serial (Mutter focus gate)

Mutter honors window activation only when the token carries the keyboard-
focus serial from wl_keyboard.enter; GPUI used a stale mouse-press serial.
See docs/tray-window-focus-wayland.md in logiguard.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

crates/call/Cargo.toml

@@ -0,0 +1,57 @@
+[package]
+name = "call"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/call.rs"
+doctest = false
+
+[features]
+test-support = [
+    "client/test-support",
+    "collections/test-support",
+    "gpui/test-support",
+    "livekit_client/test-support",
+    "project/test-support",
+    "util/test-support",
+    "workspace/test-support"
+]
+
+[dependencies]
+anyhow.workspace = true
+audio.workspace = true
+client.workspace = true
+collections.workspace = true
+fs.workspace = true
+futures.workspace = true
+feature_flags.workspace = true
+gpui = { workspace = true, features = ["screen-capture"] }
+gpui_tokio.workspace = true
+language.workspace = true
+livekit_client.workspace = true
+log.workspace = true
+postage.workspace = true
+project.workspace = true
+serde.workspace = true
+settings.workspace = true
+telemetry.workspace = true
+util.workspace = true
+workspace.workspace = true
+
+[dev-dependencies]
+client = { workspace = true, features = ["test-support"] }
+collections = { workspace = true, features = ["test-support"] }
+fs = { workspace = true, features = ["test-support"] }
+gpui = { workspace = true, features = ["test-support"] }
+language = { workspace = true, features = ["test-support"] }
+project = { workspace = true, features = ["test-support"] }
+util = { workspace = true, features = ["test-support"] }
+workspace = { workspace = true, features = ["test-support"] }
+
+livekit_client = { workspace = true, features = ["test-support"] }

crates/call/LICENSE-GPL

@@ -0,0 +1 @@
+../../LICENSE-GPL

crates/call/src/call.rs

@@ -0,0 +1,5 @@
+pub mod call_settings;
+
+mod call_impl;
+
+pub use call_impl::*;

crates/call/src/call_impl/diagnostics.rs

@@ -0,0 +1,232 @@
+use gpui::{Context, Task, WeakEntity};
+use livekit_client::ConnectionQuality;
+use std::time::Duration;
+
+use super::room::Room;
+
+#[derive(Clone, Default)]
+pub struct CallStats {
+    pub connection_quality: Option<ConnectionQuality>,
+    pub effective_quality: Option<ConnectionQuality>,
+    pub latency_ms: Option<f64>,
+    pub jitter_ms: Option<f64>,
+    pub packet_loss_pct: Option<f64>,
+    pub input_lag: Option<Duration>,
+}
+
+pub struct CallDiagnostics {
+    stats: CallStats,
+    room: WeakEntity<Room>,
+    poll_task: Option<Task<()>>,
+    stats_update_task: Option<Task<()>>,
+}
+
+impl CallDiagnostics {
+    pub fn new(room: WeakEntity<Room>, cx: &mut Context<Self>) -> Self {
+        let mut this = Self {
+            stats: CallStats::default(),
+            room,
+            poll_task: None,
+            stats_update_task: None,
+        };
+        this.start_polling(cx);
+        this
+    }
+
+    pub fn stats(&self) -> &CallStats {
+        &self.stats
+    }
+
+    fn start_polling(&mut self, cx: &mut Context<Self>) {
+        self.poll_task = Some(cx.spawn(async move |this, cx| {
+            loop {
+                if this.update(cx, |this, cx| this.poll_stats(cx)).is_err() {
+                    break;
+                }
+                cx.background_executor().timer(Duration::from_secs(1)).await;
+            }
+        }));
+    }
+
+    fn poll_stats(&mut self, cx: &mut Context<Self>) {
+        let Some(room) = self.room.upgrade() else {
+            return;
+        };
+
+        let connection_quality = room.read(cx).connection_quality();
+        self.stats.connection_quality = Some(connection_quality);
+        self.stats.input_lag = room.read(cx).input_lag();
+
+        let stats_future = room.read(cx).get_stats(cx);
+
+        let background_task = cx.background_executor().spawn(async move {
+            let session_stats = stats_future.await;
+            session_stats.map(|stats| compute_network_stats(&stats))
+        });
+
+        self.stats_update_task = Some(cx.spawn(async move |this, cx| {
+            let result = background_task.await;
+            this.update(cx, |this, cx| {
+                if let Some(computed) = result {
+                    this.stats.latency_ms = computed.latency_ms;
+                    this.stats.jitter_ms = computed.jitter_ms;
+                    this.stats.packet_loss_pct = computed.packet_loss_pct;
+                }
+                let quality = this
+                    .stats
+                    .connection_quality
+                    .unwrap_or(ConnectionQuality::Lost);
+                this.stats.effective_quality =
+                    Some(effective_connection_quality(quality, &this.stats));
+                cx.notify();
+            })
+            .ok();
+        }));
+    }
+}
+
+struct ComputedNetworkStats {
+    latency_ms: Option<f64>,
+    jitter_ms: Option<f64>,
+    packet_loss_pct: Option<f64>,
+}
+
+fn compute_network_stats(stats: &livekit_client::SessionStats) -> ComputedNetworkStats {
+    let mut min_rtt: Option<f64> = None;
+    let mut max_jitter: Option<f64> = None;
+    let mut total_packets_received: u64 = 0;
+    let mut total_packets_lost: i64 = 0;
+
+    let all_stats = stats
+        .publisher_stats
+        .iter()
+        .chain(stats.subscriber_stats.iter());
+
+    for stat in all_stats {
+        extract_metrics(
+            stat,
+            &mut min_rtt,
+            &mut max_jitter,
+            &mut total_packets_received,
+            &mut total_packets_lost,
+        );
+    }
+
+    let total_expected = total_packets_received as i64 + total_packets_lost;
+    let packet_loss_pct = if total_expected > 0 {
+        Some((total_packets_lost as f64 / total_expected as f64) * 100.0)
+    } else {
+        None
+    };
+
+    ComputedNetworkStats {
+        latency_ms: min_rtt.map(|rtt| rtt * 1000.0),
+        jitter_ms: max_jitter.map(|j| j * 1000.0),
+        packet_loss_pct,
+    }
+}
+
+#[cfg(all(
+    not(rust_analyzer),
+    any(
+        test,
+        feature = "test-support",
+        all(target_os = "windows", target_env = "gnu"),
+        target_os = "freebsd"
+    )
+))]
+fn extract_metrics(
+    _stat: &livekit_client::RtcStats,
+    _min_rtt: &mut Option<f64>,
+    _max_jitter: &mut Option<f64>,
+    _total_packets_received: &mut u64,
+    _total_packets_lost: &mut i64,
+) {
+}
+
+#[cfg(any(
+    rust_analyzer,
+    not(any(
+        test,
+        feature = "test-support",
+        all(target_os = "windows", target_env = "gnu"),
+        target_os = "freebsd"
+    ))
+))]
+fn extract_metrics(
+    stat: &livekit_client::RtcStats,
+    min_rtt: &mut Option<f64>,
+    max_jitter: &mut Option<f64>,
+    total_packets_received: &mut u64,
+    total_packets_lost: &mut i64,
+) {
+    use livekit_client::RtcStats;
+
+    match stat {
+        RtcStats::CandidatePair(pair) => {
+            let rtt = pair.candidate_pair.current_round_trip_time;
+            if rtt > 0.0 {
+                *min_rtt = Some(match *min_rtt {
+                    Some(current) => current.min(rtt),
+                    None => rtt,
+                });
+            }
+        }
+        RtcStats::InboundRtp(inbound) => {
+            let jitter = inbound.received.jitter;
+            if jitter > 0.0 {
+                *max_jitter = Some(match *max_jitter {
+                    Some(current) => current.max(jitter),
+                    None => jitter,
+                });
+            }
+            *total_packets_received += inbound.received.packets_received;
+            *total_packets_lost += inbound.received.packets_lost;
+        }
+        RtcStats::RemoteInboundRtp(remote_inbound) => {
+            let rtt = remote_inbound.remote_inbound.round_trip_time;
+            if rtt > 0.0 {
+                *min_rtt = Some(match *min_rtt {
+                    Some(current) => current.min(rtt),
+                    None => rtt,
+                });
+            }
+        }
+        _ => {}
+    }
+}
+
+fn metric_quality(value: f64, warn_threshold: f64, error_threshold: f64) -> ConnectionQuality {
+    if value < warn_threshold {
+        ConnectionQuality::Excellent
+    } else if value < error_threshold {
+        ConnectionQuality::Poor
+    } else {
+        ConnectionQuality::Lost
+    }
+}
+
+/// Computes the effective connection quality by taking the worst of the
+/// LiveKit-reported quality and each individual metric rating.
+fn effective_connection_quality(
+    livekit_quality: ConnectionQuality,
+    stats: &CallStats,
+) -> ConnectionQuality {
+    let mut worst = livekit_quality;
+
+    if let Some(latency) = stats.latency_ms {
+        worst = worst.max(metric_quality(latency, 100.0, 300.0));
+    }
+    if let Some(jitter) = stats.jitter_ms {
+        worst = worst.max(metric_quality(jitter, 30.0, 75.0));
+    }
+    if let Some(loss) = stats.packet_loss_pct {
+        worst = worst.max(metric_quality(loss, 1.0, 5.0));
+    }
+    if let Some(lag) = stats.input_lag {
+        let lag_ms = lag.as_secs_f64() * 1000.0;
+        worst = worst.max(metric_quality(lag_ms, 20.0, 50.0));
+    }
+
+    worst
+}

crates/call/src/call_impl/mod.rs

@@ -0,0 +1,811 @@
+pub mod diagnostics;
+pub mod participant;
+pub mod room;
+
+use anyhow::{Context as _, Result, anyhow};
+use audio::Audio;
+use client::{ChannelId, Client, TypedEnvelope, User, UserStore, ZED_ALWAYS_ACTIVE, proto};
+use collections::HashSet;
+use futures::{Future, FutureExt, channel::oneshot, future::Shared};
+use gpui::{
+    AnyView, App, AppContext as _, AsyncApp, Context, Entity, EventEmitter, Subscription, Task,
+    TaskExt, WeakEntity, Window,
+};
+use postage::watch;
+use project::Project;
+use room::Event;
+use settings::Settings;
+use std::sync::Arc;
+use workspace::{
+    ActiveCallEvent, AnyActiveCall, GlobalAnyActiveCall, MultiWorkspace, MultiWorkspaceEvent, Pane,
+    RemoteCollaborator, SharedScreen, Workspace,
+};
+
+pub use livekit_client::{RemoteVideoTrack, RemoteVideoTrackView, RemoteVideoTrackViewEvent};
+pub use room::Room;
+
+use crate::call_settings::CallSettings;
+
+pub fn init(client: Arc<Client>, user_store: Entity<UserStore>, cx: &mut App) {
+    let active_call = cx.new(|cx| ActiveCall::new(client, user_store, cx));
+    let active_call_handle = active_call.downgrade();
+
+    cx.observe_new(move |_multi_workspace: &mut MultiWorkspace, window, cx| {
+        let Some(window) = window else {
+            return;
+        };
+
+        let active_call_handle = active_call_handle.clone();
+        cx.subscribe_in(
+            &cx.entity(),
+            window,
+            move |multi_workspace, _, event: &MultiWorkspaceEvent, window, cx| {
+                if !matches!(event, MultiWorkspaceEvent::ActiveWorkspaceChanged { .. })
+                    && window.is_window_active()
+                {
+                    return;
+                }
+
+                let project = multi_workspace.workspace().read(cx).project().clone();
+                if let Ok(task) = active_call_handle.update(cx, |active_call, cx| {
+                    active_call.set_location(Some(&project), cx)
+                }) {
+                    task.detach_and_log_err(cx);
+                }
+            },
+        )
+        .detach();
+    })
+    .detach();
+
+    cx.set_global(GlobalAnyActiveCall(Arc::new(ActiveCallEntity(active_call))))
+}
+
+#[derive(Clone)]
+struct ActiveCallEntity(Entity<ActiveCall>);
+
+impl AnyActiveCall for ActiveCallEntity {
+    fn entity(&self) -> gpui::AnyEntity {
+        self.0.clone().into_any()
+    }
+
+    fn is_in_room(&self, cx: &App) -> bool {
+        self.0.read(cx).room().is_some()
+    }
+
+    fn room_id(&self, cx: &App) -> Option<u64> {
+        Some(self.0.read(cx).room()?.read(cx).id())
+    }
+
+    fn channel_id(&self, cx: &App) -> Option<ChannelId> {
+        self.0.read(cx).room()?.read(cx).channel_id()
+    }
+
+    fn hang_up(&self, cx: &mut App) -> Task<Result<()>> {
+        self.0.update(cx, |this, cx| this.hang_up(cx))
+    }
+
+    fn unshare_project(&self, project: Entity<Project>, cx: &mut App) -> Result<()> {
+        self.0
+            .update(cx, |this, cx| this.unshare_project(project, cx))
+    }
+
+    fn remote_participant_for_peer_id(
+        &self,
+        peer_id: proto::PeerId,
+        cx: &App,
+    ) -> Option<workspace::RemoteCollaborator> {
+        let room = self.0.read(cx).room()?.read(cx);
+        let participant = room.remote_participant_for_peer_id(peer_id)?;
+        Some(RemoteCollaborator {
+            user: participant.user.clone(),
+            peer_id: participant.peer_id,
+            location: participant.location,
+            participant_index: participant.participant_index,
+        })
+    }
+
+    fn is_sharing_project(&self, cx: &App) -> bool {
+        self.0
+            .read(cx)
+            .room()
+            .map_or(false, |room| room.read(cx).is_sharing_project())
+    }
+
+    fn is_sharing_screen(&self, cx: &App) -> bool {
+        self.0
+            .read(cx)
+            .room()
+            .map_or(false, |room| room.read(cx).is_sharing_screen())
+    }
+
+    fn has_remote_participants(&self, cx: &App) -> bool {
+        self.0.read(cx).room().map_or(false, |room| {
+            !room.read(cx).remote_participants().is_empty()
+        })
+    }
+
+    fn local_participant_is_guest(&self, cx: &App) -> bool {
+        self.0
+            .read(cx)
+            .room()
+            .map_or(false, |room| room.read(cx).local_participant_is_guest())
+    }
+
+    fn client(&self, cx: &App) -> Arc<Client> {
+        self.0.read(cx).client()
+    }
+
+    fn share_on_join(&self, cx: &App) -> bool {
+        CallSettings::get_global(cx).share_on_join
+    }
+
+    fn join_channel(&self, channel_id: ChannelId, cx: &mut App) -> Task<Result<bool>> {
+        let task = self
+            .0
+            .update(cx, |this, cx| this.join_channel(channel_id, cx));
+        cx.spawn(async move |_cx| {
+            let result = task.await?;
+            Ok(result.is_some())
+        })
+    }
+
+    fn room_update_completed(&self, cx: &mut App) -> Task<()> {
+        let Some(room) = self.0.read(cx).room().cloned() else {
+            return Task::ready(());
+        };
+        let future = room.update(cx, |room, _cx| room.room_update_completed());
+        cx.spawn(async move |_cx| {
+            future.await;
+        })
+    }
+
+    fn most_active_project(&self, cx: &App) -> Option<(u64, u64)> {
+        let room = self.0.read(cx).room()?;
+        room.read(cx).most_active_project(cx)
+    }
+
+    fn share_project(&self, project: Entity<Project>, cx: &mut App) -> Task<Result<u64>> {
+        self.0
+            .update(cx, |this, cx| this.share_project(project, cx))
+    }
+
+    fn join_project(
+        &self,
+        project_id: u64,
+        language_registry: Arc<language::LanguageRegistry>,
+        fs: Arc<dyn fs::Fs>,
+        cx: &mut App,
+    ) -> Task<Result<Entity<Project>>> {
+        let Some(room) = self.0.read(cx).room().cloned() else {
+            return Task::ready(Err(anyhow::anyhow!("not in a call")));
+        };
+        room.update(cx, |room, cx| {
+            room.join_project(project_id, language_registry, fs, cx)
+        })
+    }
+
+    fn peer_id_for_user_in_room(&self, user_id: u64, cx: &App) -> Option<proto::PeerId> {
+        let room = self.0.read(cx).room()?.read(cx);
+        room.remote_participants()
+            .values()
+            .find(|p| p.user.legacy_id == user_id)
+            .map(|p| p.peer_id)
+    }
+
+    fn subscribe(
+        &self,
+        window: &mut Window,
+        cx: &mut Context<Workspace>,
+        handler: Box<
+            dyn Fn(&mut Workspace, &ActiveCallEvent, &mut Window, &mut Context<Workspace>),
+        >,
+    ) -> Subscription {
+        cx.subscribe_in(
+            &self.0,
+            window,
+            move |workspace, _, event: &room::Event, window, cx| {
+                let mapped = match event {
+                    room::Event::ParticipantLocationChanged { participant_id } => {
+                        Some(ActiveCallEvent::ParticipantLocationChanged {
+                            participant_id: *participant_id,
+                        })
+                    }
+                    room::Event::RemoteVideoTracksChanged { participant_id } => {
+                        Some(ActiveCallEvent::RemoteVideoTracksChanged {
+                            participant_id: *participant_id,
+                        })
+                    }
+                    room::Event::LocalScreenShareStarted => {
+                        Some(ActiveCallEvent::LocalScreenShareStarted)
+                    }
+                    room::Event::LocalScreenShareStopped => {
+                        Some(ActiveCallEvent::LocalScreenShareStopped)
+                    }
+                    _ => None,
+                };
+                if let Some(event) = mapped {
+                    handler(workspace, &event, window, cx);
+                }
+            },
+        )
+    }
+
+    fn create_shared_screen(
+        &self,
+        peer_id: client::proto::PeerId,
+        pane: &Entity<Pane>,
+        window: &mut Window,
+        cx: &mut App,
+    ) -> Option<Entity<workspace::SharedScreen>> {
+        let room = self.0.read(cx).room()?.clone();
+        let participant = room.read(cx).remote_participant_for_peer_id(peer_id)?;
+        let track = participant.video_tracks.values().next()?.clone();
+        let user = participant.user.clone();
+
+        for item in pane.read(cx).items_of_type::<SharedScreen>() {
+            if item.read(cx).peer_id == peer_id {
+                return Some(item);
+            }
+        }
+
+        Some(cx.new(|cx: &mut Context<SharedScreen>| {
+            let my_sid = track.sid();
+            cx.subscribe(
+                &room,
+                move |_: &mut SharedScreen,
+                      _: Entity<Room>,
+                      ev: &room::Event,
+                      cx: &mut Context<SharedScreen>| {
+                    if let room::Event::RemoteVideoTrackUnsubscribed { sid } = ev
+                        && *sid == my_sid
+                    {
+                        cx.emit(workspace::shared_screen::Event::Close);
+                    }
+                },
+            )
+            .detach();
+
+            cx.observe_release(
+                &room,
+                |_: &mut SharedScreen, _: &mut Room, cx: &mut Context<SharedScreen>| {
+                    cx.emit(workspace::shared_screen::Event::Close);
+                },
+            )
+            .detach();
+
+            let view = cx.new(|cx| RemoteVideoTrackView::new(track.clone(), window, cx));
+            cx.subscribe(
+                &view,
+                |_: &mut SharedScreen,
+                 _: Entity<RemoteVideoTrackView>,
+                 ev: &RemoteVideoTrackViewEvent,
+                 cx: &mut Context<SharedScreen>| match ev {
+                    RemoteVideoTrackViewEvent::Close => {
+                        cx.emit(workspace::shared_screen::Event::Close);
+                    }
+                },
+            )
+            .detach();
+
+            pub(super) fn clone_remote_video_track_view(
+                view: &AnyView,
+                window: &mut Window,
+                cx: &mut App,
+            ) -> AnyView {
+                let view = view
+                    .clone()
+                    .downcast::<RemoteVideoTrackView>()
+                    .expect("SharedScreen view must be a RemoteVideoTrackView");
+                let cloned = view.update(cx, |view, cx| view.clone(window, cx));
+                AnyView::from(cloned)
+            }
+
+            SharedScreen::new(
+                peer_id,
+                user,
+                AnyView::from(view),
+                clone_remote_video_track_view,
+                cx,
+            )
+        }))
+    }
+
+    fn peer_ids_with_video_tracks(&self, cx: &App) -> Vec<proto::PeerId> {
+        let Some(room) = self.0.read(cx).room() else {
+            return Vec::new();
+        };
+        room.read(cx)
+            .remote_participants()
+            .values()
+            .filter(|p| p.has_video_tracks())
+            .map(|p| p.peer_id)
+            .collect()
+    }
+}
+
+pub struct OneAtATime {
+    cancel: Option<oneshot::Sender<()>>,
+}
+
+impl OneAtATime {
+    /// spawn a task in the given context.
+    /// if another task is spawned before that resolves, or if the OneAtATime itself is dropped, the first task will be cancelled and return Ok(None)
+    /// otherwise you'll see the result of the task.
+    fn spawn<F, Fut, R>(&mut self, cx: &mut App, f: F) -> Task<Result<Option<R>>>
+    where
+        F: 'static + FnOnce(AsyncApp) -> Fut,
+        Fut: Future<Output = Result<R>>,
+        R: 'static,
+    {
+        let (tx, rx) = oneshot::channel();
+        self.cancel.replace(tx);
+        cx.spawn(async move |cx| {
+            futures::select_biased! {
+                _ = rx.fuse() => Ok(None),
+                result = f(cx.clone()).fuse() => result.map(Some),
+            }
+        })
+    }
+
+    fn running(&self) -> bool {
+        self.cancel
+            .as_ref()
+            .is_some_and(|cancel| !cancel.is_canceled())
+    }
+}
+
+#[derive(Clone)]
+pub struct IncomingCall {
+    pub room_id: u64,
+    pub calling_user: Arc<User>,
+    pub participants: Vec<Arc<User>>,
+    pub initial_project: Option<proto::ParticipantProject>,
+}
+
+/// Singleton global maintaining the user's participation in a room across workspaces.
+pub struct ActiveCall {
+    room: Option<(Entity<Room>, Vec<Subscription>)>,
+    pending_room_creation: Option<Shared<Task<Result<Entity<Room>, Arc<anyhow::Error>>>>>,
+    location: Option<WeakEntity<Project>>,
+    _join_debouncer: OneAtATime,
+    pending_invites: HashSet<u64>,
+    incoming_call: (
+        watch::Sender<Option<IncomingCall>>,
+        watch::Receiver<Option<IncomingCall>>,
+    ),
+    client: Arc<Client>,
+    user_store: Entity<UserStore>,
+    _subscriptions: Vec<client::Subscription>,
+}
+
+impl EventEmitter<Event> for ActiveCall {}
+
+impl ActiveCall {
+    fn new(client: Arc<Client>, user_store: Entity<UserStore>, cx: &mut Context<Self>) -> Self {
+        Self {
+            room: None,
+            pending_room_creation: None,
+            location: None,
+            pending_invites: Default::default(),
+            incoming_call: watch::channel(),
+            _join_debouncer: OneAtATime { cancel: None },
+            _subscriptions: vec![
+                client.add_request_handler(cx.weak_entity(), Self::handle_incoming_call),
+                client.add_message_handler(cx.weak_entity(), Self::handle_call_canceled),
+            ],
+            client,
+            user_store,
+        }
+    }
+
+    pub fn channel_id(&self, cx: &App) -> Option<ChannelId> {
+        self.room()?.read(cx).channel_id()
+    }
+
+    async fn handle_incoming_call(
+        this: Entity<Self>,
+        envelope: TypedEnvelope<proto::IncomingCall>,
+        mut cx: AsyncApp,
+    ) -> Result<proto::Ack> {
+        let user_store = this.read_with(&cx, |this, _| this.user_store.clone());
+        let call = IncomingCall {
+            room_id: envelope.payload.room_id,
+            participants: user_store
+                .update(&mut cx, |user_store, cx| {
+                    user_store.get_users(envelope.payload.participant_user_ids, cx)
+                })
+                .await?,
+            calling_user: user_store
+                .update(&mut cx, |user_store, cx| {
+                    user_store.get_user(envelope.payload.calling_user_id, cx)
+                })
+                .await?,
+            initial_project: envelope.payload.initial_project,
+        };
+        this.update(&mut cx, |this, _| {
+            *this.incoming_call.0.borrow_mut() = Some(call);
+        });
+
+        Ok(proto::Ack {})
+    }
+
+    async fn handle_call_canceled(
+        this: Entity<Self>,
+        envelope: TypedEnvelope<proto::CallCanceled>,
+        mut cx: AsyncApp,
+    ) -> Result<()> {
+        this.update(&mut cx, |this, _| {
+            let mut incoming_call = this.incoming_call.0.borrow_mut();
+            if incoming_call
+                .as_ref()
+                .is_some_and(|call| call.room_id == envelope.payload.room_id)
+            {
+                incoming_call.take();
+            }
+        });
+        Ok(())
+    }
+
+    pub fn global(cx: &App) -> Entity<Self> {
+        Self::try_global(cx).unwrap()
+    }
+
+    pub fn try_global(cx: &App) -> Option<Entity<Self>> {
+        let any = cx.try_global::<GlobalAnyActiveCall>()?;
+        any.0.entity().downcast::<Self>().ok()
+    }
+
+    pub fn invite(
+        &mut self,
+        called_user_id: u64,
+        initial_project: Option<Entity<Project>>,
+        cx: &mut Context<Self>,
+    ) -> Task<Result<()>> {
+        if !self.pending_invites.insert(called_user_id) {
+            return Task::ready(Err(anyhow!("user was already invited")));
+        }
+        cx.notify();
+
+        if self._join_debouncer.running() {
+            return Task::ready(Ok(()));
+        }
+
+        let room = if let Some(room) = self.room().cloned() {
+            Some(Task::ready(Ok(room)).shared())
+        } else {
+            self.pending_room_creation.clone()
+        };
+
+        let invite = if let Some(room) = room {
+            cx.spawn(async move |_, cx| {
+                let room = room.await.map_err(|err| anyhow!("{err:?}"))?;
+
+                let initial_project_id = if let Some(initial_project) = initial_project {
+                    Some(
+                        room.update(cx, |room, cx| room.share_project(initial_project, cx))
+                            .await?,
+                    )
+                } else {
+                    None
+                };
+
+                room.update(cx, move |room, cx| {
+                    room.call(called_user_id, initial_project_id, cx)
+                })
+                .await?;
+
+                anyhow::Ok(())
+            })
+        } else {
+            let client = self.client.clone();
+            let user_store = self.user_store.clone();
+            let room = cx
+                .spawn(async move |this, cx| {
+                    let create_room = async {
+                        let room = cx
+                            .update(|cx| {
+                                Room::create(
+                                    called_user_id,
+                                    initial_project,
+                                    client,
+                                    user_store,
+                                    cx,
+                                )
+                            })
+                            .await?;
+
+                        this.update(cx, |this, cx| this.set_room(Some(room.clone()), cx))?
+                            .await?;
+
+                        anyhow::Ok(room)
+                    };
+
+                    let room = create_room.await;
+                    this.update(cx, |this, _| this.pending_room_creation = None)?;
+                    room.map_err(Arc::new)
+                })
+                .shared();
+            self.pending_room_creation = Some(room.clone());
+            cx.background_spawn(async move {
+                room.await.map_err(|err| anyhow!("{err:?}"))?;
+                anyhow::Ok(())
+            })
+        };
+
+        cx.spawn(async move |this, cx| {
+            let result = invite.await;
+            if result.is_ok() {
+                this.update(cx, |this, cx| {
+                    this.report_call_event("Participant Invited", cx)
+                })?;
+            } else {
+                //TODO: report collaboration error
+                log::error!("invite failed: {:?}", result);
+            }
+
+            this.update(cx, |this, cx| {
+                this.pending_invites.remove(&called_user_id);
+                cx.notify();
+            })?;
+            result
+        })
+    }
+
+    pub fn cancel_invite(
+        &mut self,
+        called_user_id: u64,
+        cx: &mut Context<Self>,
+    ) -> Task<Result<()>> {
+        let room_id = if let Some(room) = self.room() {
+            room.read(cx).id()
+        } else {
+            return Task::ready(Err(anyhow!("no active call")));
+        };
+
+        let client = self.client.clone();
+        cx.background_spawn(async move {
+            client
+                .request(proto::CancelCall {
+                    room_id,
+                    called_user_id,
+                })
+                .await?;
+            anyhow::Ok(())
+        })
+    }
+
+    pub fn incoming(&self) -> watch::Receiver<Option<IncomingCall>> {
+        self.incoming_call.1.clone()
+    }
+
+    pub fn accept_incoming(&mut self, cx: &mut Context<Self>) -> Task<Result<()>> {
+        if self.room.is_some() {
+            return Task::ready(Err(anyhow!("cannot join while on another call")));
+        }
+
+        let call = if let Some(call) = self.incoming_call.0.borrow_mut().take() {
+            call
+        } else {
+            return Task::ready(Err(anyhow!("no incoming call")));
+        };
+
+        if self.pending_room_creation.is_some() {
+            return Task::ready(Ok(()));
+        }
+
+        let room_id = call.room_id;
+        let client = self.client.clone();
+        let user_store = self.user_store.clone();
+        let join = self
+            ._join_debouncer
+            .spawn(cx, move |cx| Room::join(room_id, client, user_store, cx));
+
+        cx.spawn(async move |this, cx| {
+            let room = join.await?;
+            this.update(cx, |this, cx| this.set_room(room.clone(), cx))?
+                .await?;
+            this.update(cx, |this, cx| {
+                this.report_call_event("Incoming Call Accepted", cx)
+            })?;
+            Ok(())
+        })
+    }
+
+    pub fn decline_incoming(&mut self, _: &mut Context<Self>) -> Result<()> {
+        let call = self
+            .incoming_call
+            .0
+            .borrow_mut()
+            .take()
+            .context("no incoming call")?;
+        telemetry::event!("Incoming Call Declined", room_id = call.room_id);
+        self.client.send(proto::DeclineCall {
+            room_id: call.room_id,
+        })?;
+        Ok(())
+    }
+
+    pub fn join_channel(
+        &mut self,
+        channel_id: ChannelId,
+        cx: &mut Context<Self>,
+    ) -> Task<Result<Option<Entity<Room>>>> {
+        if let Some(room) = self.room().cloned() {
+            if room.read(cx).channel_id() == Some(channel_id) {
+                return Task::ready(Ok(Some(room)));
+            } else {
+                room.update(cx, |room, cx| room.clear_state(cx));
+            }
+        }
+
+        if self.pending_room_creation.is_some() {
+            return Task::ready(Ok(None));
+        }
+
+        let client = self.client.clone();
+        let user_store = self.user_store.clone();
+        let join = self._join_debouncer.spawn(cx, move |cx| async move {
+            Room::join_channel(channel_id, client, user_store, cx).await
+        });
+
+        cx.spawn(async move |this, cx| {
+            let room = join.await?;
+            this.update(cx, |this, cx| this.set_room(room.clone(), cx))?
+                .await?;
+            this.update(cx, |this, cx| this.report_call_event("Channel Joined", cx))?;
+            Ok(room)
+        })
+    }
+
+    pub fn hang_up(&mut self, cx: &mut Context<Self>) -> Task<Result<()>> {
+        cx.notify();
+        self.report_call_event("Call Ended", cx);
+
+        Audio::end_call(cx);
+
+        let channel_id = self.channel_id(cx);
+        if let Some((room, _)) = self.room.take() {
+            cx.emit(Event::RoomLeft { channel_id });
+            room.update(cx, |room, cx| room.leave(cx))
+        } else {
+            Task::ready(Ok(()))
+        }
+    }
+
+    pub fn share_project(
+        &mut self,
+        project: Entity<Project>,
+        cx: &mut Context<Self>,
+    ) -> Task<Result<u64>> {
+        if let Some((room, _)) = self.room.as_ref() {
+            self.report_call_event("Project Shared", cx);
+            room.update(cx, |room, cx| room.share_project(project, cx))
+        } else {
+            Task::ready(Err(anyhow!("no active call")))
+        }
+    }
+
+    pub fn unshare_project(
+        &mut self,
+        project: Entity<Project>,
+        cx: &mut Context<Self>,
+    ) -> Result<()> {
+        let (room, _) = self.room.as_ref().context("no active call")?;
+        self.report_call_event("Project Unshared", cx);
+        room.update(cx, |room, cx| room.unshare_project(project, cx))
+    }
+
+    pub fn location(&self) -> Option<&WeakEntity<Project>> {
+        self.location.as_ref()
+    }
+
+    pub fn set_location(
+        &mut self,
+        project: Option<&Entity<Project>>,
+        cx: &mut Context<Self>,
+    ) -> Task<Result<()>> {
+        if project.is_some() || !*ZED_ALWAYS_ACTIVE {
+            self.location = project.map(|project| project.downgrade());
+            if let Some((room, _)) = self.room.as_ref() {
+                return room.update(cx, |room, cx| room.set_location(project, cx));
+            }
+        }
+        Task::ready(Ok(()))
+    }
+
+    fn set_room(&mut self, room: Option<Entity<Room>>, cx: &mut Context<Self>) -> Task<Result<()>> {
+        if room.as_ref() == self.room.as_ref().map(|room| &room.0) {
+            Task::ready(Ok(()))
+        } else {
+            cx.notify();
+            if let Some(room) = room {
+                if room.read(cx).status().is_offline() {
+                    self.room = None;
+                    Task::ready(Ok(()))
+                } else {
+                    let subscriptions = vec![
+                        cx.observe(&room, |this, room, cx| {
+                            if room.read(cx).status().is_offline() {
+                                this.set_room(None, cx).detach_and_log_err(cx);
+                            }
+
+                            cx.notify();
+                        }),
+                        cx.subscribe(&room, |_, _, event, cx| cx.emit(event.clone())),
+                    ];
+                    self.room = Some((room.clone(), subscriptions));
+                    let location = self
+                        .location
+                        .as_ref()
+                        .and_then(|location| location.upgrade());
+                    let channel_id = room.read(cx).channel_id();
+                    cx.emit(Event::RoomJoined { channel_id });
+                    room.update(cx, |room, cx| room.set_location(location.as_ref(), cx))
+                }
+            } else {
+                self.room = None;
+                Task::ready(Ok(()))
+            }
+        }
+    }
+
+    pub fn room(&self) -> Option<&Entity<Room>> {
+        self.room.as_ref().map(|(room, _)| room)
+    }
+
+    pub fn client(&self) -> Arc<Client> {
+        self.client.clone()
+    }
+
+    pub fn pending_invites(&self) -> &HashSet<u64> {
+        &self.pending_invites
+    }
+
+    pub fn report_call_event(&self, operation: &'static str, cx: &mut App) {
+        if let Some(room) = self.room() {
+            let room = room.read(cx);
+            telemetry::event!(
+                operation,
+                room_id = room.id(),
+                channel_id = room.channel_id()
+            )
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use gpui::TestAppContext;
+
+    use crate::OneAtATime;
+
+    #[gpui::test]
+    async fn test_one_at_a_time(cx: &mut TestAppContext) {
+        let mut one_at_a_time = OneAtATime { cancel: None };
+
+        assert_eq!(
+            cx.update(|cx| one_at_a_time.spawn(cx, |_| async { Ok(1) }))
+                .await
+                .unwrap(),
+            Some(1)
+        );
+
+        let (a, b) = cx.update(|cx| {
+            (
+                one_at_a_time.spawn(cx, |_| async {
+                    panic!("");
+                }),
+                one_at_a_time.spawn(cx, |_| async { Ok(3) }),
+            )
+        });
+
+        assert_eq!(a.await.unwrap(), None::<u32>);
+        assert_eq!(b.await.unwrap(), Some(3));
+
+        let promise = cx.update(|cx| one_at_a_time.spawn(cx, |_| async { Ok(4) }));
+        drop(one_at_a_time);
+
+        assert_eq!(promise.await.unwrap(), None);
+    }
+}

crates/call/src/call_impl/participant.rs

@@ -0,0 +1,51 @@
+use client::{ParticipantIndex, User, proto};
+use collections::HashMap;
+use gpui::WeakEntity;
+use livekit_client::AudioStream;
+use project::Project;
+use std::sync::Arc;
+
+pub use livekit_client::TrackSid;
+pub use livekit_client::{RemoteAudioTrack, RemoteVideoTrack};
+
+#[derive(Clone, Default)]
+pub struct LocalParticipant {
+    pub projects: Vec<proto::ParticipantProject>,
+    pub active_project: Option<WeakEntity<Project>>,
+    pub role: proto::ChannelRole,
+}
+
+impl LocalParticipant {
+    pub fn can_write(&self) -> bool {
+        matches!(
+            self.role,
+            proto::ChannelRole::Admin | proto::ChannelRole::Member
+        )
+    }
+}
+
+pub struct RemoteParticipant {
+    pub user: Arc<User>,
+    pub peer_id: proto::PeerId,
+    pub role: proto::ChannelRole,
+    pub projects: Vec<proto::ParticipantProject>,
+    pub location: workspace::ParticipantLocation,
+    pub participant_index: ParticipantIndex,
+    pub muted: bool,
+    pub speaking: bool,
+    pub video_tracks: HashMap<TrackSid, RemoteVideoTrack>,
+    pub audio_tracks: HashMap<TrackSid, (RemoteAudioTrack, AudioStream)>,
+}
+
+impl RemoteParticipant {
+    pub fn has_video_tracks(&self) -> bool {
+        !self.video_tracks.is_empty()
+    }
+
+    pub fn can_write(&self) -> bool {
+        matches!(
+            self.role,
+            proto::ChannelRole::Admin | proto::ChannelRole::Member
+        )
+    }
+}

crates/call/src/call_settings.rs

@@ -0,0 +1,17 @@
+use settings::{RegisterSetting, Settings};
+
+#[derive(Debug, RegisterSetting)]
+pub struct CallSettings {
+    pub mute_on_join: bool,
+    pub share_on_join: bool,
+}
+
+impl Settings for CallSettings {
+    fn from_settings(content: &settings::SettingsContent) -> Self {
+        let call = content.calls.clone().unwrap();
+        CallSettings {
+            mute_on_join: call.mute_on_join.unwrap(),
+            share_on_join: call.share_on_join.unwrap(),
+        }
+    }
+}