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implement MediaSession.setPositionState method

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This commit is contained in:
Shinichi Morimoto 2019-11-27 15:17:24 +09:00
parent 83bb96740d
commit 274d4d2303
3 changed files with 78 additions and 2 deletions
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59
components/script/dom/mediasession.rs
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@ -9,10 +9,13 @@ use crate::dom::bindings::codegen::Bindings::HTMLMediaElementBinding::HTMLMediaE
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::MediaPositionState;
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::error::{Error, Fallible};
use crate::dom::bindings::num::Finite;
use crate::dom::bindings::reflector::{reflect_dom_object, DomObject, Reflector};
use crate::dom::bindings::root::{DomRoot, MutNullableDom};
use crate::dom::bindings::str::DOMString;
@ -194,6 +197,62 @@ impl MediaSessionMethods for MediaSession {
None => self.action_handlers.borrow_mut().remove(&action.into()),
};
}
/// https://w3c.github.io/mediasession/#dom-mediasession-setpositionstate
fn SetPositionState(&self, state: &MediaPositionState) -> Fallible<()> {
// If the state is an empty dictionary then clear the position state.
if state.duration.is_none() && state.position.is_none() && state.playbackRate.is_none() {
if let Some(media_instance) = self.media_instance.get() {
media_instance.reset();
}
return Ok(());
}
// If the duration is not present or its value is null, throw a TypeError.
if state.duration.is_none() {
return Err(Error::Type(
"duration is not present or its value is null".to_owned(),
));
}
// If the duration is negative, throw a TypeError.
if let Some(state_duration) = state.duration {
if *state_duration < 0.0 {
return Err(Error::Type("duration is negative".to_owned()));
}
}
// If the position is negative or greater than duration, throw a TypeError.
if let Some(state_position) = state.position {
if *state_position < 0.0 {
return Err(Error::Type("position is negative".to_owned()));
}
if let Some(state_duration) = state.duration {
if *state_position > *state_duration {
return Err(Error::Type("position is greater than duration".to_owned()));
}
}
}
// If the playbackRate is zero throw a TypeError.
if let Some(state_playback_rate) = state.playbackRate {
if *state_playback_rate <= 0.0 {
return Err(Error::Type("playbackRate is zero".to_owned()));
}
}
// Update the position state and last position updated time.
if let Some(media_instance) = self.media_instance.get() {
media_instance.set_duration(state.duration.map(|v| *v).unwrap());
// If the playbackRate is not present or its value is null, set it to 1.0.
let _ =
media_instance.SetPlaybackRate(state.playbackRate.unwrap_or(Finite::wrap(1.0)))?;
// If the position is not present or its value is null, set it to zero.
media_instance.SetCurrentTime(state.position.unwrap_or(Finite::wrap(0.0)));
}
Ok(())
}
}
impl From<MediaSessionAction> for MediaSessionActionType {