Using stack-allocated variable for font feature setting
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Using stack-allocated small vector instead of the previous vector<u8>.
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remove no-op viewport code
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MallocSizeOf is similar to the existing HeapSizeOf trait from the
heapsize crate. The only difference is that MallocSizeOf's
malloc_size_of_children() function takes an additional MallocSizeOfFn
argument, which is used to measure heap blocks. This extra argument
makes MallocSizeOf match how Gecko's memory measurements work, and is
required for Stylo to integrate with DMD.
The patch also introduces a second trait, MallocSizeOfWithGuard, which
is much the same as MallocSizeOf, but with a |guard| argument for the
global style lock.
Finally, the patch uses the new traits to measure a small amount of
Stylo's memory usage.
Webdriver browsing contexts not pipelines
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At the moment, a webdriver session stores a `pipeline_id`s, which causes a mismatch with the spec, which asks a session to store a browsing context and a top-level browsing context. This PR fixes this mismatch.
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Update dependencies
No Cargo.toml changes except `base64` which is updated from 0.4.2 to 0.5.2. Does not affect stylo. No new crates in the dependency graph.
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Implement window.closed
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Implements #16705. window.closed should evaluate to true if BrowsingContext is discarded
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Fix stylo bindings for Gecko changes to nsITheme constants in bug 1367577
These changes fix the stylo bindings for the changes to the Gecko nsITheme constants in [bug 1367577](https://bugzilla.mozilla.org/show_bug.cgi?id=1367577).
I believe there isn't anything in these changes that should affect the stylo build (as opposed to the servo build, which I've tested on try in that bug).
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It seems that changeset 97ce9ed5b0
mistakenly changed the check that a cascade level to keep is *not* an
animation level to a check that it *is* an animation level.
This is a little bit odd, because I didn't want to do all the work to
convert the theme constants to an enum class (although that would be
nice to do in the future). So this makes them a regular enum, but still
uses gecko_constant_prefix rather than gecko_enum_prefix because that
makes it possible to add the NS_THEME_ prefix that's still present.
script/layout: Stop doing unsafe transmutes between refcell references.
This commit splits the style and layout data in two separate refcells.
These transmutes have been a source of trouble (for example on Android), and
they feel like a hack anyway.
Fixes#16982
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