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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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46
components/style/matching.rs
View file

@ -440,7 +440,7 @@ trait PrivateMatchMethods: TElement {
use crate::animation;
let this_opaque = self.as_node().opaque();
let mut running_and_expired_transitions = vec![];
let mut expired_transitions = vec![];
let shared_context = context.shared;
if let Some(ref mut old_values) = *old_values {
// We apply the expired transitions and animations to the old style
@ -454,14 +454,13 @@ trait PrivateMatchMethods: TElement {
shared_context,
this_opaque,
old_values,
&mut running_and_expired_transitions,
&mut expired_transitions,
);
Self::update_style_for_animations_and_collect_running_transitions(
Self::update_style_for_animations(
shared_context,
this_opaque,
old_values,
&mut running_and_expired_transitions,
&context.thread_local.font_metrics_provider,
);
}
@ -479,13 +478,13 @@ trait PrivateMatchMethods: TElement {
// Trigger transitions if necessary. This will set `new_values` to
// the starting value of the transition if it did trigger a transition.
if let Some(ref values) = old_values {
animation::start_transitions_if_applicable(
animation::update_transitions(
&shared_context,
new_animations_sender,
this_opaque,
&values,
new_values,
&shared_context.timer,
&running_and_expired_transitions,
&expired_transitions,
);
}
}
@ -627,33 +626,30 @@ trait PrivateMatchMethods: TElement {
}
#[cfg(feature = "servo")]
fn update_style_for_animations_and_collect_running_transitions(
fn update_style_for_animations(
context: &SharedStyleContext,
node: OpaqueNode,
style: &mut Arc<ComputedValues>,
running_transitions: &mut Vec<crate::animation::PropertyAnimation>,
font_metrics: &dyn crate::font_metrics::FontMetricsProvider,
) {
use crate::animation::{self, Animation, AnimationUpdate};
let had_running_animations = context.running_animations.read().get(&node).is_some();
if !had_running_animations {
return;
}
let mut all_running_animations = context.running_animations.write();
for mut running_animation in all_running_animations.get_mut(&node).unwrap() {
if let Animation::Transition(_, _, ref property_animation) = *running_animation {
running_transitions.push(property_animation.clone());
continue;
}
let running_animations = match all_running_animations.get_mut(&node) {
Some(running_animations) => running_animations,
None => return,
};
let update = animation::update_style_for_animation::<Self>(
context,
&mut running_animation,
style,
font_metrics,
);
for running_animation in running_animations.iter_mut() {
let update = match *running_animation {
Animation::Transition(..) => continue,
Animation::Keyframes(..) => animation::update_style_for_animation::<Self>(
context,
running_animation,
style,
font_metrics,
),
};
match *running_animation {
Animation::Transition(..) => unreachable!(),