stylo: Implement font feature values lookup
This PR reviewed by emilio and xidorn on bugzilla
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This is a temporary step needed to support Gecko's getKeyframes() API
until we implement bug 1391537. It only takes effect when
a ComputedValues object is supplied and only for longhand declarations.
This moves us to clear on rebuild, which allows us to remove yet another place
where we track stylist dirtiness.
Bug: 1390255
Reviewed-by: heycam
MozReview-Commit-ID: nihQbUAbh8
Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
style: Move nsStyleContext::mParent to GeckoStyleContext.
Unfortunately this means that we lose the NS_STYLE_INHERIT_BIT optimization to
avoid posting changes if we had not requested the struct. In practice, I'm not
sure this optimization matters much, though, and we already compare all the
structs anyway.
We _could_ keep a weak parent pointer from the text style if needed, given we're
going to keep alive the text style at least until the parent style context goes
away, so should be safe, but I don't think the extra churn is worth it, to be
honest. Happy to do so as part of bug 1368290 if you think it's worth it.
Bug: 1385896
Reviewed-by: heycam
MozReview-Commit-ID: ka6tNwf4Ke
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Unfortunately this means that we lose the NS_STYLE_INHERIT_BIT optimization to
avoid posting changes if we had not requested the struct. In practice, I'm not
sure this optimization matters much, though, and we already compare all the
structs anyway.
We _could_ keep a weak parent pointer from the text style if needed, given we're
going to keep alive the text style at least until the parent style context goes
away, so should be safe, but I don't think the extra churn is worth it, to be
honest. Happy to do so as part of bug 1368290 if you think it's worth it.
Bug: 1385896
Reviewed-by: heycam
MozReview-Commit-ID: ka6tNwf4Ke
The patch provides FFI access to Gecko's SeenPtrs type from Rust, in
order to record what has already been measured when measuring Arcs. (The
SeenPtrs must be initialized on the Gecko side because the same table is
reused for measuring all Elements within a window, because Elements can
share ComputedValues.) I have confirmed with DMD that this is working
correctly.
The patch also introduces MallocSizeOfRepeats, which is like
MallocSizeOf but takes a SizeOfState, which holds a SeenPtrs table.
Implement ::first-line support in stylo
<!-- Please describe your changes on the following line: -->
Fixes Gecko bug 1324619.
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Add message suffixes to stylo error reports.
This is the Servo-side part of https://bugzilla.mozilla.org/show_bug.cgi?id=1381137. This allows us to add the "Declaration dropped" or "Skipped to next declaration" messages after relevant CSS errors that are reported.
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