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Add support for canceling CSS transitions

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This change adds support for canceling CSS transitions when a property
is no longer transitionable or when an element becomes styled with
display:none. Support for canceling and replacing CSS transitions when
the end value changes is still pending. This change also takes advantage
of updating the constellation message to fix a bug where transition
events could be sent for closed pipelines.

Fixes #15079.
This commit is contained in:
Martin Robinson 2020-04-21 16:32:53 +02:00
parent 99cd30eaad
commit 453b252a65
15 changed files with 351 additions and 153 deletions
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50
components/layout/animation.rs
View file

@ -13,7 +13,9 @@ use fxhash::{FxHashMap, FxHashSet};
use ipc_channel::ipc::IpcSender;
use msg::constellation_msg::PipelineId;
use script_traits::UntrustedNodeAddress;
use script_traits::{AnimationState, ConstellationControlMsg, LayoutMsg as ConstellationMsg};
use script_traits::{
AnimationState, ConstellationControlMsg, LayoutMsg as ConstellationMsg, TransitionEventType,
};
use style::animation::{update_style_for_animation, Animation};
use style::dom::TElement;
use style::font_metrics::ServoMetricsProvider;
@ -28,6 +30,7 @@ pub fn update_animation_state<E>(
script_chan: &IpcSender<ConstellationControlMsg>,
running_animations: &mut FxHashMap<OpaqueNode, Vec<Animation>>,
expired_animations: &mut FxHashMap<OpaqueNode, Vec<Animation>>,
cancelled_animations: &mut FxHashMap<OpaqueNode, Vec<Animation>>,
mut keys_to_remove: FxHashSet<OpaqueNode>,
mut newly_transitioning_nodes: Option<&mut Vec<UntrustedNodeAddress>>,
new_animations_receiver: &Receiver<Animation>,
@ -36,6 +39,8 @@ pub fn update_animation_state<E>(
) where
E: TElement,
{
send_events_for_cancelled_animations(script_chan, cancelled_animations, pipeline_id);
let mut new_running_animations = vec![];
while let Ok(animation) = new_animations_receiver.try_recv() {
let mut should_push = true;
@ -102,11 +107,13 @@ pub fn update_animation_state<E>(
if let Animation::Transition(node, _, ref property_animation) = running_animation {
script_chan
.send(ConstellationControlMsg::TransitionEnd(
node.to_untrusted_node_address(),
property_animation.property_name().into(),
property_animation.duration,
))
.send(ConstellationControlMsg::TransitionEvent {
pipeline_id,
event_type: TransitionEventType::TransitionEnd,
node: node.to_untrusted_node_address(),
property_name: property_animation.property_name().into(),
elapsed_time: property_animation.duration,
})
.unwrap();
}
@ -161,6 +168,37 @@ pub fn update_animation_state<E>(
.unwrap();
}
/// Send events for cancelled animations. Currently this only handles cancelled
/// transitions, but eventually this should handle cancelled CSS animations as
/// well.
pub fn send_events_for_cancelled_animations(
script_channel: &IpcSender<ConstellationControlMsg>,
cancelled_animations: &mut FxHashMap<OpaqueNode, Vec<Animation>>,
pipeline_id: PipelineId,
) {
for (node, animations) in cancelled_animations.drain() {
for animation in animations {
match animation {
Animation::Transition(transition_node, _, ref property_animation) => {
debug_assert!(transition_node == node);
script_channel
.send(ConstellationControlMsg::TransitionEvent {
pipeline_id,
event_type: TransitionEventType::TransitionCancel,
node: node.to_untrusted_node_address(),
property_name: property_animation.property_name().into(),
elapsed_time: property_animation.duration,
})
.unwrap();
},
Animation::Keyframes(..) => {
warn!("Got unexpected animation in expired transitions list.")
},
}
}
}
}
/// Recalculates style for a set of animations. This does *not* run with the DOM
/// lock held. Returns a set of nodes associated with animations that are no longer
/// valid.