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Add animation and transition support for pseudo-elements

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This change extends the DocumentAnimationSet to hold animations for
pseudo-elements. Since pseudo-elements in Servo are not in the DOM like
in Gecko, they need to be handled a bit carefully in stylo.  When a
pseudo-element has an animation, recascade the style. Finally, this
change passes the pseudo-element string properly to animation events.

Fixes: #10316
This commit is contained in:
Martin Robinson 2020-06-15 11:51:23 +02:00
parent ba5568a0a6
commit f3e373bc62
19 changed files with 359 additions and 138 deletions
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16
components/layout_thread/lib.rs
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@ -109,7 +109,7 @@ use style::invalidation::element::restyle_hints::RestyleHint;
use style::logical_geometry::LogicalPoint;
use style::media_queries::{Device, MediaList, MediaType};
use style::properties::PropertyId;
use style::selector_parser::SnapshotMap;
use style::selector_parser::{PseudoElement, SnapshotMap};
use style::servo::restyle_damage::ServoRestyleDamage;
use style::shared_lock::{SharedRwLock, SharedRwLockReadGuard, StylesheetGuards};
use style::stylesheets::{
@ -1651,7 +1651,19 @@ impl LayoutThread {
fn traverse_flow(flow: &mut dyn Flow, invalid_nodes: &mut FxHashSet<AnimationSetKey>) {
flow.mutate_fragments(&mut |fragment| {
invalid_nodes.remove(&AnimationSetKey(fragment.node));
// Ideally we'd only not cancel ::before and ::after animations if they
// were actually in the tree. At this point layout has lost information
// about whether or not they exist, but have had their fragments accumulated
// together.
invalid_nodes.remove(&AnimationSetKey::new_for_non_pseudo(fragment.node));
invalid_nodes.remove(&AnimationSetKey::new_for_pseudo(
fragment.node,
PseudoElement::Before,
));
invalid_nodes.remove(&AnimationSetKey::new_for_pseudo(
fragment.node,
PseudoElement::After,
));
});
for kid in flow.mut_base().children.iter_mut() {
traverse_flow(kid, invalid_nodes)