geckolib: remove std::mem::transmute usages
We can make these look nicer with the FFIArcHelpers trait.
I think there are tests for these changes? Not sure.
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geckolib: use a global thread pool for styling
By having a single thread pool, rather than one per document, we use less memory. This addresses https://bugzilla.mozilla.org/show_bug.cgi?id=1324250.
This may be obvious to an experienced Rust programmer, but I went with raw pointers because trying to use `Option` global variables resulted in complaints about turning on feature flags in nightly Rust. Since this is for stylo, nightly features are not appropriate here.
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Simplify defining arc ffi types
r? @Manishearth
I don't have a good sense for creating syntax... so if you have any suggestion for the syntax of `impl_arc_ffi` macro, it would be appreciated.
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@keyframes anim {
from { opacity: 0; transform: none; }
to { transform: none; }
}
In above case, we have to add opacity property and value in the 'to' keyframe.
Sometimes clippy gets outdated by months, and its current support setup
means that each Servo component need to opt into it by depending on
the plugins crate manually, and not all components do that.
Major pain point is that I had to write the bitfield stuff manually, but that
should be resolved soon again.
Now we generate proper layout for _every_ struct, including field offsets \o/.
Update cssparser to 0.9
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