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Hoist StyleNew{Children,Subtree} into their own paths.

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The buggy animation handling isn't a regression, since currently we pass
UnstyledChildrenOnly in those cases, which blocks the animation traversal
in Servo_TraverseSubtree.

In general I really wanted to handle these two paths together. But there's
enough broken with the NewChildren path that I wanted to scope the buginess
as tightly as possible. And I really need to separate the handling here from
StyleDocument() to make the restyle root stuff work.

MozReview-Commit-ID: 9F0mcQl7AAX
This commit is contained in:
Bobby Holley 2017-07-26 13:13:00 -07:00
parent 32790be78d
commit f4ccbf3687
6 changed files with 63 additions and 103 deletions
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7
components/style/traversal_flags.rs
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@ -16,8 +16,9 @@ bitflags! {
/// Traverse and update all elements with CSS animations since
/// @keyframes rules may have changed. Triggered by CSS rule changes.
const ForCSSRuleChanges = 1 << 1,
/// Traverse only unstyled children of the root and their descendants.
const UnstyledChildrenOnly = 1 << 2,
/// Styles unstyled elements, but does not handle invalidations on
/// already-styled elements.
const UnstyledOnly = 1 << 2,
/// A forgetful traversal ignores the previous state of the frame tree, and
/// thus does not compute damage or maintain other state describing the styles
/// pre-traversal. A forgetful traversal is usually the right thing if you
@ -55,7 +56,7 @@ pub fn assert_traversal_flags_match() {
check_traversal_flags! {
ServoTraversalFlags_AnimationOnly => AnimationOnly,
ServoTraversalFlags_ForCSSRuleChanges => ForCSSRuleChanges,
ServoTraversalFlags_UnstyledChildrenOnly => UnstyledChildrenOnly,
ServoTraversalFlags_UnstyledOnly => UnstyledOnly,
ServoTraversalFlags_Forgetful => Forgetful,
ServoTraversalFlags_AggressivelyForgetful => AggressivelyForgetful,
ServoTraversalFlags_ClearDirtyDescendants => ClearDirtyDescendants,