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Move active media session logic to constellation

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This commit is contained in:
Fernando Jiménez Moreno 2019-10-28 16:08:05 +01:00
parent 08f9f17ed3
commit 85ec66b43e
7 changed files with 46 additions and 51 deletions
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32
components/constellation/constellation.rs
View file

@ -112,6 +112,7 @@ use compositing::SendableFrameTree;
use crossbeam_channel::{after, never, unbounded, Receiver, Sender};
use devtools_traits::{ChromeToDevtoolsControlMsg, DevtoolsControlMsg};
use embedder_traits::{Cursor, EmbedderMsg, EmbedderProxy, EventLoopWaker};
use embedder_traits::{MediaSessionEvent, MediaSessionPlaybackState};
use euclid::{default::Size2D as UntypedSize2D, Size2D};
use gfx::font_cache_thread::FontCacheThread;
use gfx_traits::Epoch;
@ -475,8 +476,8 @@ pub struct Constellation<Message, LTF, STF> {
/// Mechanism to force the compositor to process events.
event_loop_waker: Option<Box<dyn EventLoopWaker>>,
/// Browser ID of the active media session, if any.
active_media_session: Option<TopLevelBrowsingContextId>,
/// Browing context ID of the active media session.
active_media_session: Option<BrowsingContextId>,
}
/// State needed to construct a constellation.
@ -1778,6 +1779,30 @@ where
new_value,
);
},
FromScriptMsg::MediaSessionEvent(browsing_context_id, event) => {
// Unlikely at this point, but we may receive events coming from
// different media sessions, so we set the active media session based
// on Playing events.
// The last media session claiming to be in playing state is set to
// the active media session.
// Events coming from inactive media sessions are discarded.
if self.active_media_session.is_some() {
match event {
MediaSessionEvent::PlaybackStateChange(ref state) => {
match state {
MediaSessionPlaybackState::Playing => (),
_ => return,
};
},
_ => (),
};
}
self.active_media_session = Some(browsing_context_id);
self.embedder_proxy.send((
Some(source_top_ctx_id),
EmbedderMsg::MediaSessionEvent(event),
));
},
}
}
@ -5042,8 +5067,7 @@ where
);
},
};
let msg =
ConstellationControlMsg::MediaSessionAction(top_level_browsing_context_id, action);
let msg = ConstellationControlMsg::MediaSessionAction(browsing_context_id, action);
let result = match self.pipelines.get(&pipeline_id) {
None => {
return warn!(

17
components/script/dom/mediasession.rs
View file

@ -16,9 +16,10 @@ use crate::dom::mediametadata::MediaMetadata;
use crate::dom::window::Window;
use crate::script_thread::ScriptThread;
use dom_struct::dom_struct;
use embedder_traits::{EmbedderMsg, MediaSessionEvent};
use msg::constellation_msg::TopLevelBrowsingContextId;
use embedder_traits::MediaSessionEvent;
use msg::constellation_msg::BrowsingContextId;
use script_traits::MediaSessionActionType;
use script_traits::ScriptMsg;
use std::collections::HashMap;
use std::rc::Rc;
@ -39,7 +40,7 @@ pub struct MediaSession {
impl MediaSession {
#[allow(unrooted_must_root)]
fn new_inherited(browsing_context_id: TopLevelBrowsingContextId) -> MediaSession {
fn new_inherited(browsing_context_id: BrowsingContextId) -> MediaSession {
let media_session = MediaSession {
reflector_: Reflector::new(),
metadata: Default::default(),
@ -52,7 +53,7 @@ impl MediaSession {
}
pub fn new(window: &Window) -> DomRoot<MediaSession> {
let browsing_context_id = window.window_proxy().top_level_browsing_context_id();
let browsing_context_id = window.window_proxy().browsing_context_id();
reflect_dom_object(
Box::new(MediaSession::new_inherited(browsing_context_id)),
window,
@ -74,7 +75,8 @@ impl MediaSession {
pub fn send_event(&self, event: MediaSessionEvent) {
let global = self.global();
let window = global.as_window();
window.send_to_embedder(EmbedderMsg::MediaSessionEvent(event));
let browsing_context_id = window.window_proxy().browsing_context_id();
window.send_to_constellation(ScriptMsg::MediaSessionEvent(browsing_context_id, event));
}
}
@ -121,10 +123,7 @@ impl MediaSessionMethods for MediaSession {
impl Drop for MediaSession {
fn drop(&mut self) {
let global = self.global();
let browsing_context_id = global
.as_window()
.window_proxy()
.top_level_browsing_context_id();
let browsing_context_id = global.as_window().window_proxy().browsing_context_id();
ScriptThread::remove_media_session(browsing_context_id);
}
}

4
components/script/dom/navigator.rs
View file

@ -194,7 +194,7 @@ impl NavigatorMethods for Navigator {
/// https://w3c.github.io/mediasession/#dom-navigator-mediasession
fn MediaSession(&self) -> DomRoot<MediaSession> {
self.mediasession.or_init(|| {
// There is a single MediaSession instance per top level browsing context
// There is a single MediaSession instance per browsing context
// and only one active MediaSession globally.
//
// MediaSession creation can happen in two cases:
@ -206,7 +206,7 @@ impl NavigatorMethods for Navigator {
// the script thread.
let global = self.global();
let window = global.as_window();
let browsing_context_id = window.window_proxy().top_level_browsing_context_id();
let browsing_context_id = window.window_proxy().browsing_context_id();
match ScriptThread::get_media_session(browsing_context_id) {
Some(session) => session,
None => MediaSession::new(window),

10
components/script/script_thread.rs
View file

@ -701,7 +701,7 @@ pub struct ScriptThread {
/// The MediaSessions known by this thread, if any.
/// There can only be one active MediaSession.
/// The constellation has the BrowsingContextId of the active MediaSession, if any.
media_sessions: DomRefCell<HashMap<TopLevelBrowsingContextId, Dom<MediaSession>>>,
media_sessions: DomRefCell<HashMap<BrowsingContextId, Dom<MediaSession>>>,
}
/// In the event of thread panic, all data on the stack runs its destructor. However, there
@ -3938,7 +3938,7 @@ impl ScriptThread {
fn handle_media_session_action(
&self,
browsing_context_id: TopLevelBrowsingContextId,
browsing_context_id: BrowsingContextId,
action: MediaSessionActionType,
) {
match self.media_sessions.borrow().get(&browsing_context_id) {
@ -3973,7 +3973,7 @@ impl ScriptThread {
pub fn register_media_session(
media_session: &MediaSession,
browsing_context_id: TopLevelBrowsingContextId,
browsing_context_id: BrowsingContextId,
) {
SCRIPT_THREAD_ROOT.with(|root| {
let script_thread = unsafe { &*root.get().unwrap() };
@ -3984,7 +3984,7 @@ impl ScriptThread {
})
}
pub fn remove_media_session(browsing_context_id: TopLevelBrowsingContextId) {
pub fn remove_media_session(browsing_context_id: BrowsingContextId) {
SCRIPT_THREAD_ROOT.with(|root| {
let script_thread = unsafe { &*root.get().unwrap() };
script_thread
@ -3995,7 +3995,7 @@ impl ScriptThread {
}
pub fn get_media_session(
browsing_context_id: TopLevelBrowsingContextId,
browsing_context_id: BrowsingContextId,
) -> Option<DomRoot<MediaSession>> {
SCRIPT_THREAD_ROOT.with(|root| {
let script_thread = unsafe { &*root.get().unwrap() };

2
components/script_traits/lib.rs
View file

@ -389,7 +389,7 @@ pub enum ConstellationControlMsg {
/// Notifies the script thread about a new recorded paint metric.
PaintMetric(PipelineId, ProgressiveWebMetricType, u64),
/// Notifies the media session about a user requested media session action.
MediaSessionAction(TopLevelBrowsingContextId, MediaSessionActionType),
MediaSessionAction(BrowsingContextId, MediaSessionActionType),
}
impl fmt::Debug for ConstellationControlMsg {

3
components/script_traits/script_msg.rs
View file

@ -17,7 +17,7 @@ use crate::WorkerGlobalScopeInit;
use crate::WorkerScriptLoadOrigin;
use canvas_traits::canvas::{CanvasId, CanvasMsg};
use devtools_traits::{ScriptToDevtoolsControlMsg, WorkerId};
use embedder_traits::EmbedderMsg;
use embedder_traits::{EmbedderMsg, MediaSessionEvent};
use euclid::default::Size2D as UntypedSize2D;
use euclid::Size2D;
use gfx_traits::Epoch;
@ -306,6 +306,7 @@ impl fmt::Debug for ScriptMsg {
GetClientWindow(..) => "GetClientWindow",
GetScreenSize(..) => "GetScreenSize",
GetScreenAvailSize(..) => "GetScreenAvailSize",
MediaSessionEvent(..) => "MediaSessionEvent",
};
write!(formatter, "ScriptMsg::{}", variant)
}

29
components/servo/lib.rs
View file

@ -83,7 +83,6 @@ use constellation::{Constellation, InitialConstellationState, UnprivilegedPipeli
use constellation::{FromCompositorLogger, FromScriptLogger};
use crossbeam_channel::{unbounded, Sender};
use embedder_traits::{EmbedderMsg, EmbedderProxy, EmbedderReceiver, EventLoopWaker};
use embedder_traits::{MediaSessionEvent, MediaSessionPlaybackState};
use env_logger::Builder as EnvLoggerBuilder;
use euclid::{Scale, Size2D};
#[cfg(all(
@ -272,8 +271,6 @@ pub struct Servo<Window: WindowMethods + 'static + ?Sized> {
embedder_events: Vec<(Option<BrowserId>, EmbedderMsg)>,
profiler_enabled: bool,
webgl_thread_data: Option<Rc<WebGLMainThread>>,
/// Browser ID of the active media session, if any.
active_media_session: Option<BrowserId>,
}
#[derive(Clone)]
@ -560,7 +557,6 @@ where
embedder_events: Vec::new(),
profiler_enabled: false,
webgl_thread_data,
active_media_session: None,
}
}
@ -750,31 +746,6 @@ where
self.embedder_events.push(event);
},
(EmbedderMsg::MediaSessionEvent(event), ShutdownState::NotShuttingDown) => {
// Unlikely at this point, but we may receive events coming from
// different media sessions, so we set the active media session based
// on Playing events.
// The last media session claiming to be in playing state is set to
// the active media session.
// Events coming from inactive media sessions are discarded.
if self.active_media_session.is_some() {
match event {
MediaSessionEvent::PlaybackStateChange(ref state) => {
match state {
MediaSessionPlaybackState::Playing => (),
_ => return,
};
},
_ => (),
};
}
self.active_media_session = top_level_browsing_context;
self.embedder_events.push((
top_level_browsing_context,
EmbedderMsg::MediaSessionEvent(event),
));
},
(msg, ShutdownState::NotShuttingDown) => {
self.embedder_events.push((top_level_browsing_context, msg));
},