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Use a restyle for animation ticks
This change corrects synchronization issues with animations, by reworking the animation processing model to do a quick restyle and incremental layout when ticking animations. While this change adds overhead to animation ticks, the idea is that this will be the fallback when synchronous behavior is required to fulfill specification requirements. In the optimistic case, many animations could be updated and applied off-the-main-thread and then resynchronized when style information is queried by script. Fixes #13865.
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39 changed files with 1285 additions and 1662 deletions
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@ -25,7 +25,6 @@ use crate::shared_lock::StylesheetGuards;
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use crate::sharing::StyleSharingCache;
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use crate::stylist::Stylist;
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use crate::thread_state::{self, ThreadState};
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use crate::timer::Timer;
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use crate::traversal::DomTraversal;
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use crate::traversal_flags::TraversalFlags;
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use app_units::Au;
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@ -156,9 +155,9 @@ pub struct SharedStyleContext<'a> {
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/// Guards for pre-acquired locks
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pub guards: StylesheetGuards<'a>,
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/// The current timer for transitions and animations. This is needed to test
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/// them.
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pub timer: Timer,
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/// The current time for transitions and animations. This is needed to ensure
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/// a consistent sampling time and also to adjust the time for testing.
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pub current_time_for_animations: f64,
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/// Flags controlling how we traverse the tree.
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pub traversal_flags: TraversalFlags,
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