Clear animation-only dirty descendants bit on display:none descendants
PR for [Gecko bug 1359658](https://bugzilla.mozilla.org/show_bug.cgi?id=1359658)
When an element has a display:none ancestor we don't traverse it during
restyle. However, at the end of restyling we expect the tree to be free
of dirty bits. We currently take special care to clear the regular
(non-animation) dirty bit on nodes in display:none subtrees in order to
preserve this invariant. This patch applies the same handling to the
animation-only dirty descendants bit.
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- [X] `./mach build -d` just keeps crashing because mozjs calls sed.exe in a way that breaks it
- [X] `./mach test-tidy` does not report any errors
- [X] There are tests for these changes on the Gecko side
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When an element has a display:none ancestor we don't traverse it during
restyle. However, at the end of restyling we expect the tree to be free
of dirty bits. We currently take special care to clear the regular
(non-animation) dirty bit on nodes in display:none subtrees in order to
preserve this invariant. This patch applies the same handling to the
animation-only dirty descendants bit.
style: Move all the fixup code into a StyleAdjuster struct.
This will allow reusing it from text styles, which we need for some corner
cases, like text-align: -moz-center and similar stuff.
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stylo: support all overflow values
overflow:clip doesn't exist, it's just called clip internally. Renamed, and added the other missing values.
I also removed the overflow newtype -- no need for extra code bloat, and it's not protecting us from much.
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Notify embedder when history changes
`WindowMethods::set_page_url` is only called when the embedder set the URL. It is not called when the page url is updated. I believe that instead we should just pass the URL to `head_parsed`.
---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#15439#15643 and #15642 (github issue number if applicable).
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- [ ] There are tests for these changes OR
- [x] These changes do not require tests because I'm not sure how to test that
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Cleanup various modules and introduce generic types
Almost all the types in `values/specified` and `values/computed` share their `ToCss` implementations. The only reason they have duplicated code hanging around is a result of different specified and computed forms for types like `LengthOrPercentage`. This PR makes some of these types *generic* so that we could have a common definition and `ToCss` impl (`Parse` and `ToComputedValue` impls too, if possible).
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