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LibWeb: Implement Animation::set_start_time

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Matthew Olsson 2023-11-04 12:03:27 -07:00 • committed by Andreas Kling
parent 4889f53880
commit 422f43f4fc
2 changed files with 59 additions and 2 deletions
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56
Userland/Libraries/LibWeb/Animations/Animation.cpp
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@ -108,8 +108,46 @@ void Animation::set_timeline(JS::GCPtr<AnimationTimeline> new_timeline)
// https://www.w3.org/TR/web-animations-1/#set-the-start-time
void Animation::set_start_time(Optional<double> const& new_start_time)
{
// FIXME: Implement
(void)new_start_time;
// Setting this attribute updates the start time using the procedure to set the start time of this object to the new
// value.
// 1. Let timeline time be the current time value of the timeline that animation is associated with. If there is no
// timeline associated with animation or the associated timeline is inactive, let the timeline time be
// unresolved.
auto timeline_time = m_timeline && !m_timeline->is_inactive() ? m_timeline->current_time() : Optional<double> {};
// 2. If timeline time is unresolved and new start time is resolved, make animation’s hold time unresolved.
if (!timeline_time.has_value() && new_start_time.has_value())
m_hold_time = {};
// 3. Let previous current time be animation’s current time.
auto previous_current_time = current_time();
// 4. Apply any pending playback rate on animation.
apply_any_pending_playback_rate();
// 5. Set animation’s start time to new start time.
m_start_time = new_start_time;
// 6. Update animation’s hold time based on the first matching condition from the following,
// -> If new start time is resolved,
if (new_start_time.has_value()) {
// If animation’s playback rate is not zero, make animation’s hold time unresolved.
if (m_playback_rate != 0.0)
m_hold_time = {};
}
// -> Otherwise (new start time is unresolved),
else {
// Set animation’s hold time to previous current time even if previous current time is unresolved.
m_hold_time = previous_current_time;
}
// FIXME: 7. If animation has a pending play task or a pending pause task, cancel that task and resolve animation’s
// current ready promise with animation.
// FIXME: 8. Run the procedure to update an animation’s finished state for animation with the did seek flag set to
// true, and the synchronously notify flag set to false.
}
// https://www.w3.org/TR/web-animations-1/#animation-current-time
@ -143,6 +181,20 @@ Bindings::AnimationPlayState Animation::play_state() const
return Bindings::AnimationPlayState::Idle;
}
// https://www.w3.org/TR/web-animations-1/#apply-any-pending-playback-rate
void Animation::apply_any_pending_playback_rate()
{
// 1. If animation does not have a pending playback rate, abort these steps.
if (!m_pending_playback_rate.has_value())
return;
// 2. Set animation’s playback rate to its pending playback rate.
m_playback_rate = m_pending_playback_rate.value();
// 3. Clear animation’s pending playback rate.
m_pending_playback_rate = {};
}
JS::NonnullGCPtr<WebIDL::Promise> Animation::current_ready_promise() const
{
if (!m_current_ready_promise) {