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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::dom::bindings::callback::ExceptionHandling;
use crate::dom::bindings::cell::DomRefCell;
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::htmlmediaelement::HTMLMediaElement;
use crate::dom::mediametadata::MediaMetadata;
use crate::dom::window::Window;
use crate::script_thread::ScriptThread;
use dom_struct::dom_struct;
use msg::constellation_msg::TopLevelBrowsingContextId;
use script_traits::{MediaSessionActionType, MediaSessionEvent, ScriptMsg};
use std::collections::HashMap;
use std::rc::Rc;
#[dom_struct]
pub struct MediaSession {
reflector_: Reflector,
/// https://w3c.github.io/mediasession/#dom-mediasession-metadata
metadata: MutNullableDom<MediaMetadata>,
/// 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(browsing_context_id: TopLevelBrowsingContextId) -> MediaSession {
let media_session = MediaSession {
reflector_: Reflector::new(),
metadata: Default::default(),
playback_state: DomRefCell::new(MediaSessionPlaybackState::None),
action_handlers: DomRefCell::new(HashMap::new()),
media_instance: Default::default(),
};
ScriptThread::register_media_session(&media_session, browsing_context_id);
media_session
}
pub fn new(window: &Window) -> DomRoot<MediaSession> {
let browsing_context_id = window.window_proxy().top_level_browsing_context_id();
reflect_dom_object(
Box::new(MediaSession::new_inherited(browsing_context_id)),
window,
MediaSessionBinding::Wrap,
)
}
pub fn handle_action(&self, action: MediaSessionActionType) {
if let Some(handler) = self.action_handlers.borrow().get(&action) {
if handler.Call__(ExceptionHandling::Report).is_err() {
warn!("Error calling MediaSessionActionHandler callback");
}
return;
}
// TODO default action.
}
pub fn send_event(&self, event: MediaSessionEvent) {
let global = self.global();
let browser_id = global
.as_window()
.window_proxy()
.top_level_browsing_context_id();
let _ = global
.script_to_constellation_chan()
.send(ScriptMsg::MediaSessionEventMsg(browser_id, event))
.unwrap();
}
}
impl MediaSessionMethods for MediaSession {
/// https://w3c.github.io/mediasession/#dom-mediasession-metadata
fn GetMetadata(&self) -> Option<DomRoot<MediaMetadata>> {
self.metadata.get()
}
/// https://w3c.github.io/mediasession/#dom-mediasession-metadata
fn SetMetadata(&self, metadata: Option<&MediaMetadata>) {
if let Some(ref metadata) = metadata {
metadata.set_session(self);
}
self.metadata.set(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 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();
ScriptThread::remove_media_session(browsing_context_id);
}
}
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,
}
}
}
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