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style: Part 8: Hook scroll-timeline rule into Cascade data and use it for CSS animations

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We hook the rule into cascade data, and so we can look it up by timeline
name. Now we only use StyleScrollDirection from @scroll-timeline rule.
`source` and `scroll-offsets` are skipped now and use the default values
instead because I'm pretty sure the syntax will be changed in Bug 1733260,
and `scroll-offsets` may be obsolete because the spec proposal intents to
make it be always 0% ~ 100%.

Also, add some reftests for the default `source` and `scroll-offsets`,
and different `orientation`s.

Besides, we disable at-scroll-timeline-start-end.html in Gecko because
we don't support start/end descriptors, and there are too many
intermittents in it.

Differential Revision: https://phabricator.services.mozilla.com/D126452
This commit is contained in:
Boris Chiou 2023-06-06 15:26:17 +02:00 • committed by Oriol Brufau
parent 84cd22c3e0
commit e66bcf2cc5
3 changed files with 33 additions and 14 deletions
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11
components/style/invalidation/stylesheets.rs
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@ -619,11 +619,12 @@ impl StylesheetInvalidationSet {
// existing elements.
}
},
ScrollTimeline(..) => {
// TODO: Bug 1676784: check if animation-timeline name is referenced.
// Now we do nothing.
},
CounterStyle(..) | Page(..) | Viewport(..) | FontFeatureValues(..) => {
// TODO: Check if timeline name is referenced, though this might go away in bug 1737918.
ScrollTimeline(..) |
CounterStyle(..) |
Page(..) |
Viewport(..) |
FontFeatureValues(..) => {
debug!(
" > Found unsupported rule, marking the whole subtree \
invalid."