Check PLATFORM for proper toolchain when use msvc
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Currently, x86_64 toolchain would always pick the amd64 MSVC linker, which will fail to link when it runs in an environment configured for building x86 program (has `PLATFORM=X86` in environment variable).
This commit picks the proper host triple according to the environment variable when using the MSVC backend.
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Update selectors to 0.10, with ToCss serialization.
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r? @emilio
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disable browsing context name test
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stylo: Improve pseudo element restyling and support the content property.
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script: Disable our dependency in ffmpeg until the media madness is over
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r? @larsbergstrom
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Add FrameState
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r? @asajeffrey
Might as well get this in now, since it may be a while before I can figure out what is causing the panics on the pending pipelines PR.
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Remove some use of FFI in gecko_string_cache
Now that nsIAtom’s mLength and mString can both be accessed directly on the struct, fewer operations need to call into C++ code.
These functions are not used anymore and can be removed from the Gecko side:
* `Gecko_GetAtomAsUTF16`
* `Gecko_AtomEqualsUTF8IgnoreCase`
* `Gecko_AtomEqualsUTF8` (looks like this one was already unused before this PR)
r? @emilio
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Rewrite the style sharing candidate cache
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See the first commit's description for a bit of background. I'm making the PR in this state just to verify against try I've handled all cases of possibly incorrect sharing and, if not, fix it.
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This was the underlying cause of the restyle_hints_state.html failure.
It was uncovered only when fixing the HAS_EDGE_CHILD_SELECTOR flags because this
was the series of events happening.
* <script> starts executing.
* All the restyle hint processing takes place.
* <script> ends executing, gets appended to the body (I think this is also a bug).
* <body> receives children_changed notification, with an Append mutation.
* <body> had the HAS_EDGE_CHILD_SELECTOR flag, so due to its bogus value, it
restyled the whole tree after <body>, fixing any mishandling of restyle
hints.
The style candidate cache had regressed a few times (see #12534), and my
intuition is that being able to disable all style sharing with a single rule in
the page is really unfortunate.
This commit redesigns the style sharing cache in order to be a optimistic cache,
but then reject candidates if they match different sibling-affecting selectors
in the page, for example.
So far the numbers have improved, but not so much as I'd wanted (~10%/20% of
non-incremental restyling time in general). The current implementation is really
dumb though (we recompute and re-match a lot of stuff), so we should be able to
optimise it quite a bit.
I have different ideas for improving it (that may or may not work), apart of the
low-hanging fruit like don't re-matching candidates all the time but I have to
measure the real impact.
Also, I need to verify it against try.
