/
mediasession.rs
213 lines (194 loc) · 8.68 KB
/
mediasession.rs
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
use crate::compartments::{AlreadyInCompartment, InCompartment};
use crate::dom::bindings::callback::ExceptionHandling;
use crate::dom::bindings::cell::DomRefCell;
use crate::dom::bindings::codegen::Bindings::HTMLMediaElementBinding::HTMLMediaElementMethods;
use crate::dom::bindings::codegen::Bindings::MediaMetadataBinding::MediaMetadataInit;
use crate::dom::bindings::codegen::Bindings::MediaMetadataBinding::MediaMetadataMethods;
use crate::dom::bindings::codegen::Bindings::MediaSessionBinding;
use crate::dom::bindings::codegen::Bindings::MediaSessionBinding::MediaSessionAction;
use crate::dom::bindings::codegen::Bindings::MediaSessionBinding::MediaSessionActionHandler;
use crate::dom::bindings::codegen::Bindings::MediaSessionBinding::MediaSessionMethods;
use crate::dom::bindings::codegen::Bindings::MediaSessionBinding::MediaSessionPlaybackState;
use crate::dom::bindings::reflector::{reflect_dom_object, DomObject, Reflector};
use crate::dom::bindings::root::{DomRoot, MutNullableDom};
use crate::dom::bindings::str::DOMString;
use crate::dom::htmlmediaelement::HTMLMediaElement;
use crate::dom::mediametadata::MediaMetadata;
use crate::dom::window::Window;
use dom_struct::dom_struct;
use embedder_traits::MediaMetadata as EmbedderMediaMetadata;
use embedder_traits::MediaSessionEvent;
use script_traits::MediaSessionActionType;
use script_traits::ScriptMsg;
use std::collections::HashMap;
use std::rc::Rc;
#[dom_struct]
pub struct MediaSession {
reflector_: Reflector,
/// https://w3c.github.io/mediasession/#dom-mediasession-metadata
#[ignore_malloc_size_of = "defined in embedder_traits"]
metadata: DomRefCell<Option<EmbedderMediaMetadata>>,
/// https://w3c.github.io/mediasession/#dom-mediasession-playbackstate
playback_state: DomRefCell<MediaSessionPlaybackState>,
/// https://w3c.github.io/mediasession/#supported-media-session-actions
#[ignore_malloc_size_of = "Rc"]
action_handlers: DomRefCell<HashMap<MediaSessionActionType, Rc<MediaSessionActionHandler>>>,
/// The media instance controlled by this media session.
/// For now only HTMLMediaElements are controlled by media sessions.
media_instance: MutNullableDom<HTMLMediaElement>,
}
impl MediaSession {
#[allow(unrooted_must_root)]
fn new_inherited() -> MediaSession {
let media_session = MediaSession {
reflector_: Reflector::new(),
metadata: DomRefCell::new(None),
playback_state: DomRefCell::new(MediaSessionPlaybackState::None),
action_handlers: DomRefCell::new(HashMap::new()),
media_instance: Default::default(),
};
media_session
}
pub fn new(window: &Window) -> DomRoot<MediaSession> {
reflect_dom_object(
Box::new(MediaSession::new_inherited()),
window,
MediaSessionBinding::Wrap,
)
}
pub fn register_media_instance(&self, media_instance: &HTMLMediaElement) {
self.media_instance.set(Some(media_instance));
}
pub fn handle_action(&self, action: MediaSessionActionType) {
debug!("Handle media session action {:?}", action);
if let Some(handler) = self.action_handlers.borrow().get(&action) {
if handler.Call__(ExceptionHandling::Report).is_err() {
warn!("Error calling MediaSessionActionHandler callback");
}
return;
}
// Default action.
if let Some(media) = self.media_instance.get() {
match action {
MediaSessionActionType::Play => {
let in_compartment_proof = AlreadyInCompartment::assert(&self.global());
media.Play(InCompartment::Already(&in_compartment_proof));
},
MediaSessionActionType::Pause => {
media.Pause();
},
MediaSessionActionType::SeekBackward => {},
MediaSessionActionType::SeekForward => {},
MediaSessionActionType::PreviousTrack => {},
MediaSessionActionType::NextTrack => {},
MediaSessionActionType::SkipAd => {},
MediaSessionActionType::Stop => {},
MediaSessionActionType::SeekTo => {},
}
}
}
pub fn send_event(&self, event: MediaSessionEvent) {
let global = self.global();
let window = global.as_window();
let pipeline_id = window
.pipeline_id()
.expect("Cannot send media session event outside of a pipeline");
window.send_to_constellation(ScriptMsg::MediaSessionEvent(pipeline_id, event));
}
pub fn update_title(&self, title: String) {
let mut metadata = self.metadata.borrow_mut();
if let Some(ref mut metadata) = *metadata {
// We only update the title with the data provided by the media
// player and iff the user did not provide a title.
if !metadata.title.is_empty() {
return;
}
metadata.title = title;
} else {
*metadata = Some(EmbedderMediaMetadata::new(title));
}
self.send_event(MediaSessionEvent::SetMetadata(
metadata.as_ref().unwrap().clone(),
));
}
}
impl MediaSessionMethods for MediaSession {
/// https://w3c.github.io/mediasession/#dom-mediasession-metadata
fn GetMetadata(&self) -> Option<DomRoot<MediaMetadata>> {
if let Some(ref metadata) = *self.metadata.borrow() {
let mut init = MediaMetadataInit::empty();
init.title = DOMString::from_string(metadata.title.clone());
init.artist = DOMString::from_string(metadata.artist.clone());
init.album = DOMString::from_string(metadata.album.clone());
let global = self.global();
Some(MediaMetadata::new(&global.as_window(), &init))
} else {
None
}
}
/// https://w3c.github.io/mediasession/#dom-mediasession-metadata
fn SetMetadata(&self, metadata: Option<&MediaMetadata>) {
if let Some(ref metadata) = metadata {
metadata.set_session(self);
}
let global = self.global();
let window = global.as_window();
let _metadata = match metadata {
Some(m) => {
let title = if m.Title().is_empty() {
window.get_url().into_string()
} else {
m.Title().into()
};
EmbedderMediaMetadata {
title,
artist: m.Artist().into(),
album: m.Album().into(),
}
},
None => EmbedderMediaMetadata::new(window.get_url().into_string()),
};
*self.metadata.borrow_mut() = Some(_metadata.clone());
self.send_event(MediaSessionEvent::SetMetadata(_metadata));
}
/// https://w3c.github.io/mediasession/#dom-mediasession-playbackstate
fn PlaybackState(&self) -> MediaSessionPlaybackState {
*self.playback_state.borrow()
}
/// https://w3c.github.io/mediasession/#dom-mediasession-playbackstate
fn SetPlaybackState(&self, state: MediaSessionPlaybackState) {
*self.playback_state.borrow_mut() = state;
}
/// https://w3c.github.io/mediasession/#update-action-handler-algorithm
fn SetActionHandler(
&self,
action: MediaSessionAction,
handler: Option<Rc<MediaSessionActionHandler>>,
) {
match handler {
Some(handler) => self
.action_handlers
.borrow_mut()
.insert(action.into(), handler.clone()),
None => self.action_handlers.borrow_mut().remove(&action.into()),
};
}
}
impl From<MediaSessionAction> for MediaSessionActionType {
fn from(action: MediaSessionAction) -> MediaSessionActionType {
match action {
MediaSessionAction::Play => MediaSessionActionType::Play,
MediaSessionAction::Pause => MediaSessionActionType::Pause,
MediaSessionAction::Seekbackward => MediaSessionActionType::SeekBackward,
MediaSessionAction::Seekforward => MediaSessionActionType::SeekForward,
MediaSessionAction::Previoustrack => MediaSessionActionType::PreviousTrack,
MediaSessionAction::Nexttrack => MediaSessionActionType::NextTrack,
MediaSessionAction::Skipad => MediaSessionActionType::SkipAd,
MediaSessionAction::Stop => MediaSessionActionType::Stop,
MediaSessionAction::Seekto => MediaSessionActionType::SeekTo,
}
}
}