Use Parser::skip_whitespace in a few places to make Parser::try rewind less
**Do not merge yet.** This pulls in unrelated cssparser changes which add a dependency to `dota`, and we’d like to resolve https://github.com/dtolnay/dtoa/pull/9 before landing dtoa in mozilla-central. Also, the dependency change may require manually revendoring in mozilla-central.
Gecko’s CSS parsing microbenchmarks before:
```
43.437 ± 0.391 ms Stylo.Servo_StyleSheet_FromUTF8Bytes_Bench
29.244 ± 0.042 ms Stylo.Gecko_nsCSSParser_ParseSheet_Bench
281.884 ± 0.028 ms Stylo.Servo_DeclarationBlock_SetPropertyById_Bench
426.242 ± 0.008 ms Stylo.Servo_DeclarationBlock_SetPropertyById_WithInitialSpace_Bench
```
After:
```
29.779 ± 0.254 ms Stylo.Servo_StyleSheet_FromUTF8Bytes_Bench
28.841 ± 0.031 ms Stylo.Gecko_nsCSSParser_ParseSheet_Bench
296.240 ± 4.744 ms Stylo.Servo_DeclarationBlock_SetPropertyById_Bench
293.855 ± 4.304 ms Stylo.Servo_DeclarationBlock_SetPropertyById_WithInitialSpace_Bench
```
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stylo: Implement font feature values lookup
This PR reviewed by emilio and xidorn on bugzilla. That is backed out because of Windows build problems. Fixed and landing it again.
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The @font-feature-values declaration identifiers are asci case insensitive.
We should convert all of them to lowercase to be able to reduce the same
declarations. Also gecko stores them as lowercase in gfxFontFeatureValueSet.
We can't use a slice anymore, because the input might be the VecDeque from the
sequential traversal, which requires an iterator to handle the ring buffer.
MozReview-Commit-ID: JwH6MtRgMfY
This has two advantages:
* It allows us to store nodes in the same format that the parallel traversal uses.
* It allows us to double the size of the sequential work queue without increasing
the storage, which allows us to have WORK_UNIT_MAX * 2 entries before heap-
allocating, which is about what we want for adaptive mode.
MozReview-Commit-ID: 6VQwGfTQgct
Bug 1376883 - stylo: Drop thread pool stack size to 100k. r=bholley.
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Bug 1376883 - stylo: Drop thread pool stack size to 100k. r=bholley.
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We could use this method to convert a TransformList into a Matrix, and
use this matrix for computing distance for Stylo and rendering the transform
for Servo.
This is an equivalent of nsStyleTransformMatrix::ReadTransforms in Gecko.
style: Only store applicable ::before / ::after pseudo styles during the traversal.
This should help memory usage quite a bit.
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Remove unused selector visitor argument.
The real win here is avoiding cloning the iterator when nobody actually uses it.
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This patch will skip add_weighted() when self_portion + other_portion not equal
to zero. (i.e. adding or accumulating).
Gecko does same behavior since we can't add two auto value.
stylo: Implement font feature values lookup
This PR reviewed by emilio and xidorn on bugzilla
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Add a reusable sheets parameter to Servo_StyleSheet_FromUTF8Bytes.
MozReview-Commit-ID: DdMQpUY1WcJ
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https://bugzilla.mozilla.org/show_bug.cgi?id=1387933https://reviewboard.mozilla.org/r/171308/
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The @font-feature-values declaration identifiers are asci case insensitive.
We should convert all of them to lowercase to be able to reduce the same
declarations. Also gecko stores them as lowercase in gfxFontFeatureValueSet.
Devirtualize CSS error reporting.
This removes a trait object from the path of reporting a CSS error.
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Try to update running CSS animations when CSS rules are changed.
In the case where values in CSS rules changed directly by CSSOM, the old
value in the CSS rule block is immediately replaced by the new one. So if
the element, which is applied to the CSS rule, has running animations, the
new value is used during cascading process in animation-only restyle. Thus
in a subsequent normal restyle, we can't tell whether the value in the CSS
rule has changed or not. As a result, transitions may not be triggered
(bug 1393323) and CSS animations may not be cancelled if the updated
animation-name is 'none' (bug 1392851).
For the latter case of CSS animations where animation-name has been updated to
'none', this patch introduces a workaround whereby we trigger an update of
running animations whenever the traversal is triggered by changes to CSS rules
and we have existing CSS animations.
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https://bugzilla.mozilla.org/show_bug.cgi?id=1392851
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Improve debug log related to selector matching
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For now, only #[animation(error)] is supported on variants and it makes
both #[derive(Animate)] and #[derive(ComputeSquaredDistance)] ignore
this particular variant.
In the case where values in CSS rules changed directly by CSSOM, the old
value in the CSS rule block is immediately replaced by the new one. So if
the element, which is applied to the CSS rule, has running animations, the
new value is used during cascading process in animation-only restyle. Thus
in a subsequent normal restyle, we can't tell whether the value in the CSS
rule has changed or not. As a result, transitions may not be triggered
(bug 1393323) and CSS animations may not be cancelled if the updated
animation-name is 'none' (this bug).
For the latter case of CSS animations where animation-name has been updated to
'none', this patch introduces a workaround whereby we trigger an update of
running animations whenever the traversal is triggered by changes to CSS rules
and we have existing CSS animations.
stylo: Bug 1387990 - Fix the interpolation of 2d matrix.
Write a 2d matrix decomposition for Gecko, so the visual results and test results
could match those in Gecko. In long-term, we should let Gecko follow the spec, so we
can drop the redundant implementation.
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- [X] These changes do not require tests because these patches fix the test failures in Gecko and we have tests already in Gecko.
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