style: Don't unconditionally extend() the declaration block vector.
Since it appears in profiles when used from CSSOM, like the one in the bug
mentioned in the comment.
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selectors: Simplify :visited by only using the "is inside link" information.
Right now we go through a lot of hoops to see if we ever see a relevant link.
However, that information is not needed: if the element is a link, we'll always
need to compute its visited style because its its own relevant link.
If the element inherits from a link, we need to also compute the visited style
anyway.
So the "has a relevant link been found" is pretty useless when we know what are
we inheriting from.
The branches at the beginning of matches_complex_selector_internal were
affecting performance, and there are no good reasons to keep them.
I've verified that this passes all the visited tests in mozilla central, and
that the test-cases too-flaky to be landed still pass.
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Right now we go through a lot of hoops to see if we ever see a relevant link.
However, that information is not needed: if the element is a link, we'll always
need to compute its visited style because its its own relevant link.
If the element inherits from a link, we need to also compute the visited style
anyway.
So the "has a relevant link been found" is pretty useless when we know what are
we inheriting from.
The branches at the beginning of matches_complex_selector_internal were
affecting performance, and there are no good reasons to keep them.
I've verified that this passes all the visited tests in mozilla central, and
that the test-cases too-flaky to be landed still pass.
Defend against bugs in SelectorFlagsMap
Some defensive programming:
* Make `SelectorFlagsMap::apply_flags` private so it's easier to ensure it is called from the correct thread.
* Clear the cache and the map at the same time; otherwise `apply_flags` leaves `SelectorFlagsMap` in an inconsistent state.
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes do not require tests because they do not change behavior
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* Make `SelectorFlagsMap::apply_flags` private so it's easier to ensure
it is called from the correct thread.
* Clear the cache and the map at the same time; otherwise it leaves
`SelectorFlagsMap` in an inconsistent state.
Improve LRU cache behavior in SelectorFlagsMap
This code used to insert duplicate entries to avoid expensive shuffling of the LRU cache. With uluru this is no longer necessary, because reordering the cache is cheap.
Now it uses the `LRUCache::find` method from uluru 0.2 to update entries in-place. This should increase cache hits by eliminating unnecessary evictions.
This PR also updates `arrayvec` because `uluru` depends on it, and `immeta` because it depends on `arrayvec`.
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes do not require tests because they don't change behavior
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This code used to insert duplicate entries to avoid expensive shuffling
of the LRU cache. With uluru this is no longer necessary, because
reordering the cache is cheap.
Now it uses the `LRUCache::find` method from uluru 0.2 to update entries
in-place. This should improve the hit rate, because it eliminates
unnecessary evictions.
style: Add internal overflow-clip-box-block/-inline properties and make overflow-clip-box a shorthand.
These are the changes from bug 1422839. First commit is reviewed by me, the second is a fixup to that.
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According to the spec, this parser should follow what we do for
@font_face rule, so we use the same type to parse the input, instead of
using the parser of their specified values.
This allows us to report errors in functions that want to just parse a
single CSS value, rather than a value for a particular property declaration.
The one value type that we need to support for now is <color> value parsing
errors, so just add formatting/support for that.
style: Cleanup Angle parsing.
This PR also contains a functional change, allowing to parse unitless zero angles in hue-rotate().
See the links and the comments for why.
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