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style: return early in needs_animations_update.

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Emilio Cobos Álvarez 2018-02-24 22:34:18 +01:00
parent e5bd8fc5d8
commit e30a4d2ad2
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GPG key ID: 056B727BB9C1027C
1 changed files with 26 additions and 23 deletions
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49
components/style/matching.rs
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@ -227,34 +227,37 @@ trait PrivateMatchMethods: TElement {
fn needs_animations_update(
&self,
context: &mut StyleContext<Self>,
old_values: Option<&Arc<ComputedValues>>,
old_values: Option<&ComputedValues>,
new_values: &ComputedValues,
) -> bool {
let new_box_style = new_values.get_box();
let has_new_animation_style = new_box_style.specifies_animations();
let old = match old_values {
Some(old) => old,
None => return has_new_animation_style,
};
let has_animations = self.has_css_animations();
let old_box_style = old.get_box();
let old_display_style = old_box_style.clone_display();
let new_display_style = new_box_style.clone_display();
old_values.map_or(has_new_animation_style, |old| {
let old_box_style = old.get_box();
let old_display_style = old_box_style.clone_display();
let new_display_style = new_box_style.clone_display();
// If the traverse is triggered by CSS rule changes, we need to
// try to update all CSS animations on the element if the element
// has or will have CSS animation style regardless of whether the
// animation is running or not.
// TODO: We should check which @keyframes changed/added/deleted
// and update only animations corresponding to those @keyframes.
(context.shared.traversal_flags.contains(TraversalFlags::ForCSSRuleChanges) &&
(has_new_animation_style || has_animations)) ||
!old_box_style.animations_equals(new_box_style) ||
(old_display_style == Display::None &&
new_display_style != Display::None &&
has_new_animation_style) ||
(old_display_style != Display::None &&
new_display_style == Display::None &&
has_animations)
})
// If the traverse is triggered by CSS rule changes, we need to
// try to update all CSS animations on the element if the element
// has or will have CSS animation style regardless of whether the
// animation is running or not.
// TODO: We should check which @keyframes changed/added/deleted
// and update only animations corresponding to those @keyframes.
(context.shared.traversal_flags.contains(TraversalFlags::ForCSSRuleChanges) &&
(has_new_animation_style || has_animations)) ||
!old_box_style.animations_equals(new_box_style) ||
(old_display_style == Display::None &&
new_display_style != Display::None &&
has_new_animation_style) ||
(old_display_style != Display::None &&
new_display_style == Display::None &&
has_animations)
}
/// Create a SequentialTask for resolving descendants in a SMIL display property
@ -313,7 +316,7 @@ trait PrivateMatchMethods: TElement {
// in addition to the unvisited styles.
let mut tasks = UpdateAnimationsTasks::empty();
if self.needs_animations_update(context, old_values.as_ref(), new_values) {
if self.needs_animations_update(context, old_values.as_ref().map(|s| &**s), new_values) {
tasks.insert(UpdateAnimationsTasks::CSS_ANIMATIONS);
}