Update webrender + shaders.
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stylo: Use atoms as the pseudo-element back-end.
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A bit of work left, and we can uber-optimize this (left comments, will fill follow-ups), but this is a decent refactor so I thought I'd rather get some feedback on it.
r? @bholley (not formally yet, maybe, but some feedback is appreciated).
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This configures the regeneration of atoms as part of the normal generation of
bindings, so it stops being a whole different process.
This also adds a generated file to components/style/generated with a convenience
macro invocation for pseudo-elements, which comes handy in order to avoid
duplication.
Fix iter_arith warning when running ./mach build-cef
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Fix a cached style cascade bug that only manifested in sequential mode
When copying cached styles, keep the `writing_mode` up to date.
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EDIT: The test is now working. I ran it with the first commit (the actual fix) reverted and it failed.
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Add a flag to dump the computed style values
I used this to trace #11818 to a style bug, rather than a layout bug.
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stylo: Stop restyling display: none elements, remove the has_changed hack that made us use ReconstructFrame unconditionally.
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r? @bholley
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WR2 does not require the stencil buffer, so remove it from window pro…
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…perties.
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Prefer length and percentage for word spacing
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The goal is to make use of `LengthOrPercentage` for word spacing in `ShapingOptions`, but since it makes use of `f32` which doesn't implement `Hash`, we're going for `NotNan<f32>` from [ordered-float](https://github.com/reem/rust-ordered-float/), which supports hashing. Instead of implementing `Hash` for `LengthOrPercentage` and thereby the inner types like `CSSFloat`, `CalcLengthOrPercentage`, etc., we convert it to `(Au, NotNan<f32>)`.
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Add more shell script lints
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The "$(some_command arg1 arg2)" form is preferred to the
`some_command arg1 arg2` form because it nests unambiguously.
Add a lint for this to tidy.
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