Separate selector matching from property cascading
This builds on @emilio's rule tree work. The goal is to raise the boundary between rule node computation and property cascading higher up the callstack, so that the new traversal architecture can decide to do one but not the other.
<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/14175)
<!-- Reviewable:end -->
Support logical properties in style
Adds support for the logical block-end/inline-start/etc properties. These properties (like `border-block-end-color`) map to "physical" properties (e.g. `border-top-color`) depending on the writing mode.
Todo:
- [x] Handle shorthands
- [x] Make geckolib setters work
- [x] Handle padding/offset logical properties
- [x] Perhaps handle `-block-size`, `-inline-size` type logical properties?
- [x] Tests?
This will overall add 16 new longhands and 4 new shorthands, taking a big bite out of the [remaining properties work](https://manishearth.github.io/css-properties-list/?stylo=hide&servo=hide&firefox=only&chrome=show&mdn=false&alexa=false)
f? @emilio @SimonSapin
<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/14120)
<!-- Reviewable:end -->
style: Don't assume siblings are alive in the rule tree when removing ourselves from the child list.
<!-- Please describe your changes on the following line: -->
---
<!-- 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
<!-- Either: -->
- [x] There are tests for these changes OR
<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
We can't assume all our siblings are alive because they may very well be in the
free list too.
This tempts to happen when the rule nodes are destroyed as part of the last GC,
the one that runs in the root destructor.
Also, properly put the next sibling back into the list when the rules are GCd.
<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/14167)
<!-- Reviewable:end -->
Add support for DirectWrite font rendering on Windows
<!-- Please describe your changes on the following line: -->
This PR adds support for DirectWrite text rendering using a thin wrapper for dwrite, as well as similar functionality added to WebRender. In doing so it removes the FreeType dep from the Windows build.
There is still work to be done here, but this is a good starting point for future cleanup and fixes.
---
<!-- 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
- [ ] `./mach test-tidy` does not report any errors
- [X] These changes fix#13371 (github issue number if applicable).
<!-- Either: -->
- [ ] There are tests for these changes OR
- [X] These changes do not require tests because they are already tested by other tests
<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/14153)
<!-- Reviewable:end -->
style: Add a "start_end()" method to LogicalMargin
<!-- Please describe your changes on the following line: -->
Add a `LogicalMargin::start_end()` method that receives a `Direction' parameter. This is useful for some layout that is symmetric in inline and block directions, like flexbox.
Part of #14123.
---
<!-- 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
- [ ] These changes fix #__ (github issue number if applicable).
<!-- Either: -->
- [ ] There are tests for these changes OR
- [X] These changes do not require tests because refactoring
<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
r? @SimonSapin
<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/14136)
<!-- Reviewable:end -->
We can't assume all our siblings are alive because they may very well be in the
free list too.
This tempts to happen when the rule nodes are destroyed as part of the last GC,
the one that runs in the root destructor.
Also, properly put the next sibling back into the list when the rules are GCd.
Centralize construction of specified url() values in style.
This reduces a decent amount of overhead in #13778.
r? @SimonSapin
---
<!-- 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
<!-- Either: -->
- [x] There are tests for these changes OR
<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/13791)
<!-- Reviewable:end -->
Add a `LogicalMargin::start_end()` method that receives a `Direction'
parameter. This is useful for some layout that is symmetric in inline
and block directions, like flexbox.
