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script: Squash duplicate animation tick events in the queue.

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This prevents them from piling up endlessly if the JS
`requestAnimationFrame()` callback takes a long time to complete.
This commit is contained in:
Patrick Walton 2015-07-29 17:31:22 -07:00
parent 8b7120012a
commit 01e5c513a9
1 changed files with 9 additions and 1 deletions
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10
components/script/script_task.rs
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@ -665,8 +665,9 @@ impl ScriptTask {
}
};
// Squash any pending resize, reflow, and mouse-move events in the queue.
// Squash any pending resize, reflow, animation tick, and mouse-move events in the queue.
let mut mouse_move_event_index = None;
let mut animation_ticks = HashSet::new();
loop {
match event {
// This has to be handled before the ResizeMsg below,
@ -682,6 +683,13 @@ impl ScriptTask {
MixedMessage::FromConstellation(ConstellationControlMsg::Viewport(id, rect)) => {
self.handle_viewport(id, rect);
}
MixedMessage::FromConstellation(ConstellationControlMsg::TickAllAnimations(
pipeline_id)) => {
if !animation_ticks.contains(&pipeline_id) {
animation_ticks.insert(pipeline_id);
sequential.push(event);
}
}
MixedMessage::FromConstellation(ConstellationControlMsg::SendEvent(
_,
MouseMoveEvent(_))) => {