Improve containing block creation for position:absolute flows
Instead of only promoting flows with positioned fragments to containing
blocks, also do this for flows which have the transform, perspective or
filter properties set. This is what the spec requires and also fixes
some failing tests. It will allow us to stop creating stacking contexts
for overflow:hidden and overflow:scroll flows.
Fixes#18091.
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Update from upstream Angle.
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See https://github.com/servo/angle/pull/26
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Fix bound textures and framebuffers when a WebGL Canvas is resized
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Fix bound textures and framebuffers when a WebGL Canvas is resized. This causes some invisible textures in WebGL based games.
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Instead of only promoting flows with positioned fragments to containing
blocks, also do this for flows which have the transform, perspective or
filter properties set. This is what the spec requires and also fixes
some failing tests. It will allow us to stop creating stacking contexts
for overflow:hidden and overflow:scroll flows.
Fixes#18091.
Expose the source map URL on a style sheet
This changes Servo to track the source map URL of a style sheet. This
parallels a change going in to Gecko:
https://bugzilla.mozilla.org/show_bug.cgi?id=1388855
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- [X] These changes fix N/A - but see the bug in Bugzilla (github issue number if applicable).
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Note also that there are tests going into M-C as well as part of bug 1388855.
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Fix the broken links to the page of the Rust Programming Language
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We need to update the links of Match and Patterns in Some basic
Rust section.
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Use the is_absolute_containing_block method everywhere
This is a better approach than relying on
contains_positioned_fragments, because in the future other properties
will create absolute containing blocks.
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Unwrap function before calling IsConstructor
`IsConstructor` returns true for all wrappers that are callable. Wrapped
arrow functions are callable and thus `IsConstructor` will return true
if given one; however, if we unwrap the arrow function, `IsConstructor`
will return false. The latter is the correct behavior here.
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Revert "Auto merge of #17891 - MortimerGoro:webgl_move, r=glennw,emilio"
This reverts commit 90f55ea458, reversing
changes made to 2e60b27a21.
Doing that per Josh's request, since it's causing very frequent intermittent OOMs on the android builders.
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Remove unused StackingContextType
This hasn't been in use for quite some time.
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This is a better approach than relying on
contains_positioned_fragments, because in the future other properties
will create absolute containing blocks.
Don't allow interpolating 'fill:none' with 'fill:none'
From [Gecko bug 1390364](https://bugzilla.mozilla.org/show_bug.cgi?id=1390364).
In SMIL we don't expect the 'none' value of the 'fill' property to be additive and hence the following animation should have no effect:
```svg
<rect width="100" height="100" y="100" fill="blue">
<animate attributeName="fill" dur="3s" from="red" by="none"/>
</rect>
```
Although SMIL doesn't make this entirely clear, [it says](https://www.w3.org/TR/smil-animation/#AnimFuncValues) that "by animation" and "from-by animation" may only be used "with attributes that support addition (e.g. most numeric attributes)" and [SVG says](https://www.w3.org/TR/SVG11/animate.html#AnimationAttributesAndProperties) that `<paint>`s are "only additive if each value can be converted to an RGB color". As a result, the animation above should have no effect.
By extrapolation, animating from 'none' by 'none' should also have no effect:
```svg
<rect width="100" height="100" y="100" fill="blue">
<animate attributeName="fill" dur="3s" from="none" by="none"/>
</rect>
```
However, in Servo's interpolation of `<paint>`s we special case the interpolation and addition of 'none' such that if both values are 'none' it is allowed.
We should disallow this in order to produce the expected behavior and in order to match Gecko's behavior.
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This moves us to clear on rebuild, which allows us to remove yet another place
where we track stylist dirtiness.
Bug: 1390255
Reviewed-by: heycam
MozReview-Commit-ID: nihQbUAbh8
Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
