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LibWeb: Implement playbackRate

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Psychpsyo 2025-02-09 01:42:50 +01:00 • committed by Sam Atkins
parent 986fe0f408
commit 14e354bc29
Notes: github-actions[bot] 2025-02-10 11:39:00 +00:00
5 changed files with 123 additions and 3 deletions
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45
Libraries/LibWeb/HTML/HTMLMediaElement.cpp
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@ -570,7 +570,8 @@ WebIDL::ExceptionOr<void> HTMLMediaElement::load_element()
set_duration(NAN);
}
// FIXME: 7. Set the playbackRate attribute to the value of the defaultPlaybackRate attribute.
// 7. Set the playbackRate attribute to the value of the defaultPlaybackRate attribute.
TRY(set_playback_rate(m_default_playback_rate));
// 8. Set the error attribute to null and the can autoplay flag to true.
m_error = nullptr;
@ -1650,6 +1651,48 @@ void HTMLMediaElement::set_paused(bool paused)
set_needs_style_update(true);
}
// https://html.spec.whatwg.org/multipage/media.html#dom-media-defaultplaybackrate
void HTMLMediaElement::set_default_playback_rate(double new_value)
{
// When the defaultPlaybackRate or playbackRate attributes change value (either by being set by script or by being changed directly by the user agent, e.g. in response to user
// control) the user agent must queue a media element task given the media element to fire an event named ratechange at the media element.
if (m_default_playback_rate != new_value) {
queue_a_media_element_task([this] {
dispatch_event(DOM::Event::create(realm(), HTML::EventNames::ratechange));
});
}
// on setting the attribute must be set to the new value.
m_default_playback_rate = new_value;
}
// https://html.spec.whatwg.org/multipage/media.html#dom-media-playbackrate
WebIDL::ExceptionOr<void> HTMLMediaElement::set_playback_rate(double new_value)
{
// on setting, the user agent must follow these steps:
// 1. If the given value is not supported by the user agent, then throw a "NotSupportedError" DOMException.
// FIXME: We need to support playback rates other than 1 for this to be even remotely useful.
if (new_value != 1.0)
return WebIDL::NotSupportedError::create(realm(), "Playback rates other than 1 are not supported."_string);
// When the defaultPlaybackRate or playbackRate attributes change value (either by being set by script or by being changed directly by the user agent, e.g. in response to user
// control) the user agent must queue a media element task given the media element to fire an event named ratechange at the media element.
if (m_playback_rate != new_value) {
queue_a_media_element_task([this] {
dispatch_event(DOM::Event::create(realm(), HTML::EventNames::ratechange));
});
}
// 2. Set playbackRate to the new value, and if the element is potentially playing, change the playback speed.
m_playback_rate = new_value;
if (potentially_playing()) {
// FIXME: Do this once playback speeds other than 1 are supported.
}
return {};
}
// https://html.spec.whatwg.org/multipage/media.html#blocked-media-element
bool HTMLMediaElement::blocked() const
{