style: Don't look for viewport units in stylesheets.
Use whether we've computed any viewport unit instead.
This is more accurate (we avoid restyling unnecessarily if we've found anything
ever on the stylesheet, but that hasn't matched).
This has the benefit of also matching Gecko, and simplify some code and
fishyness around, and also hopefully speeding up stylesheet parsing.
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Use whether we've computed any viewport unit instead.
This is more accurate (we avoid restyling unnecessarily if we've found anything
ever on the stylesheet, but that hasn't matched).
This has the benefit of also matching Gecko, and simplify some code and
fishyness around, and also hopefully speeding up stylesheet parsing.
PerformanceObserverInit.buffered
Per #18108, add `buffered` flag in the `PerformanceObserverInit` dict.
Per W3C spec, when `buffered` is set, `PerformanceObserver.observe()` method adds the entries buffered in the `Performance` instance into the observer's entry buffer.
One step is the implementation of the [filter by name and type](https://w3c.github.io/performance-timeline/#filter-buffer-by-name-and-type) algorithm. Don't think that the sort operation is useful in this case, but the spec states that this algorithm is to be used.
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix#18108
- [X] These changes do not require tests (yet) because the timeline API is not powered.
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Don't fallback to discrete animations within animate().
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https://bugzilla.mozilla.org/show_bug.cgi?id=1394287
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The trait ToAnimatedZero now supports it, and it now applies to things with generics,
avoiding the trait bounds for field types of the variant on which it applies.
For the traits we derive which methods don't depend on associated types (i.e.
all of them but ToAnimatedValue and ToComputedValue), we now add trait bounds
for the actual field types directly, instead of bounding the type parameters.
[18224] Check if line_count is zero to calculate space around line
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Check line_count before attempting to calculate space around line
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- [x] These changes fix#18224 (github issue number if applicable).
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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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- [X] `./mach test-tidy` does not report any errors
- [X] These changes [Bug 1355721](https://bugzilla.mozilla.org/show_bug.cgi?id=1355721)
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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
