Stylo: Deep clone ServoStyleSheets.
MozReview-Commit-ID: 6hYIcOa86Y
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https://bugzilla.mozilla.org/show_bug.cgi?id=1339629https://reviewboard.mozilla.org/r/135314/
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Adjust the matching process to look for a "relevant link" while matching. A
"relevant link" is the element being matched if it is a link or the nearest
ancestor link.
Matching for links now depends on the `VisitedHandlingMode`, which determines
whether all links match as if they are unvisited (the default) or if the
relevant link matches as visited (and all others remain unvisited).
If a relevant link is ever found for any selector, track this as part of the
`MatchingContext` object. This is used in the next patch to determine if an
additional match and cascade should be performed to compute the styles when
visited.
MozReview-Commit-ID: 3xUbRo7vpuD
Stylo: match both ::placehoder & ::moz-placeholder for placeholder ps…
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The first patch of "Bug 1348490 - stylo: need support for ::-moz-placeholder pseudo element"
Part 2 need to be landed immediately after Part 1 be merged into servo repo:
https://reviewboard.mozilla.org/r/141264/diff/9#index_header
Bugzilla link:
https://bugzilla.mozilla.org/show_bug.cgi?id=1348490
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Stylist accessors
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Add accessor methods for the `device` and `ruleset` fields in the `Stylist` struct.
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Refactor grid style types and impls
Fixes#16949.
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Prefixed intrinsic size value
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This is a PR for https://bugzilla.mozilla.org/show_bug.cgi?id=1355402
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In some cases, e.g. mouse event, we need to request an animation-only restyle
to force flush all throttled animations when we handle an event with
coordinates. This restyle shouldn't trigger a normal restyle, and add a
different traversal flag, TraversalRestyleBehavior::ForAnimationOnly, to check.
