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@@ -1901,7 +1901,90 @@ void Document::dispatch_events_for_animation_if_necessary(JS::NonnullGCPtr<Anima
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if (!effect || !effect->is_keyframe_effect() || !animation->is_css_animation() || animation->pending())
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return;
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- // TODO: Dispatch events
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+ auto& css_animation = verify_cast<CSS::CSSAnimation>(*animation);
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+ css_animation.owning_element()->set_needs_style_update(true);
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+
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+ auto previous_phase = effect->previous_phase();
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+ auto current_phase = effect->phase();
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+ auto current_iteration = effect->current_iteration().value_or(0.0);
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+
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+ if (previous_phase != current_phase) {
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+ auto owning_element = css_animation.owning_element();
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+
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+ auto dispatch_event = [&](FlyString name, double elapsed_time) {
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+ append_pending_animation_event({
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+ .event = CSS::AnimationEvent::create(
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+ owning_element->realm(),
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+ name,
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+ {
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+ { .bubbles = true },
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+ css_animation.id(),
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+ elapsed_time,
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+ }),
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+ .target = animation,
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+ .scheduled_event_time = HighResolutionTime::unsafe_shared_current_time(),
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+ });
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+ };
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+
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+ // For calculating the elapsedTime of each event, the following definitions are used:
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+
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+ // - interval start = max(min(-start delay, active duration), 0)
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+ auto interval_start = max(min(-effect->start_delay(), effect->active_duration()), 0.0);
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+
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+ // - interval end = max(min(associated effect end - start delay, active duration), 0)
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+ auto interval_end = max(min(effect->end_time() - effect->start_delay(), effect->active_duration()), 0.0);
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+
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+ switch (previous_phase) {
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+ case Animations::AnimationEffect::Phase::Before:
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+ [[fallthrough]];
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+ case Animations::AnimationEffect::Phase::Idle:
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+ if (current_phase == Animations::AnimationEffect::Phase::Active) {
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+ dispatch_event("animationstart"_fly_string, interval_start);
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+ } else if (current_phase == Animations::AnimationEffect::Phase::After) {
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+ dispatch_event("animationstart"_fly_string, interval_start);
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+ dispatch_event("animationend"_fly_string, interval_end);
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+ }
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+ break;
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+ case Animations::AnimationEffect::Phase::Active:
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+ if (current_phase == Animations::AnimationEffect::Phase::Before) {
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+ dispatch_event("animationend"_fly_string, interval_start);
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+ } else if (current_phase == Animations::AnimationEffect::Phase::Active) {
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+ auto previous_current_iteration = effect->previous_current_iteration();
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+ if (previous_current_iteration != current_iteration) {
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+ // The elapsed time for an animationiteration event is defined as follows:
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+
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+ // 1. Let previous current iteration be the current iteration from the previous animation frame.
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+
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+ // 2. If previous current iteration is greater than current iteration, let iteration boundary be current iteration + 1,
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+ // otherwise let it be current iteration.
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+ auto iteration_boundary = previous_current_iteration > current_iteration ? current_iteration + 1 : current_iteration;
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+
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+ // 3. The elapsed time is the result of evaluating (iteration boundary - iteration start) × iteration duration).
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+ auto iteration_duration_variant = effect->iteration_duration();
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+ auto iteration_duration = iteration_duration_variant.has<String>() ? 0.0 : iteration_duration_variant.get<double>();
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+ auto elapsed_time = (iteration_boundary - effect->iteration_start()) * iteration_duration;
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+
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+ dispatch_event("animationiteration"_fly_string, elapsed_time);
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+ }
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+ } else if (current_phase == Animations::AnimationEffect::Phase::After) {
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+ dispatch_event("animationend"_fly_string, interval_end);
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+ }
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+ break;
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+ case Animations::AnimationEffect::Phase::After:
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+ if (current_phase == Animations::AnimationEffect::Phase::Active) {
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+ dispatch_event("animationstart"_fly_string, interval_end);
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+ } else if (current_phase == Animations::AnimationEffect::Phase::Before) {
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+ dispatch_event("animationstart"_fly_string, interval_end);
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+ dispatch_event("animationend"_fly_string, interval_start);
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+ }
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+ break;
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+ }
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+
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+ if (current_phase == Animations::AnimationEffect::Phase::Idle && previous_phase != Animations::AnimationEffect::Phase::Idle && previous_phase != Animations::AnimationEffect::Phase::After) {
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+ // FIXME: Use the active time "at the moment it was cancelled"
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+ dispatch_event("animationcancel"_fly_string, effect->active_time_using_fill(Bindings::FillMode::Both).value());
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+ }
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+ }
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}
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// https://html.spec.whatwg.org/multipage/browsing-the-web.html#scroll-to-the-fragment-identifier
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