Use specific assertions
Similar to #19865
r? jdm
Note: Should I squash all the commits into one commit?
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- [x] These changes do not require tests because it should not break anything
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style: make the try_match_ident_ignore_ascii_case macro actually return the error.
This allows it to be used as an expression, which I'd like to do very soon.
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Now that we have an Element around on cascade, we can stop using the cascade
flags mechanism to pass various element-related state, like "is this element the
root", or "should it use the item-based display fixup".
That fixes handwaviness in the handling of those flags from style reparenting,
and code duplication to handle tricky stuff like :visited.
There are a number of other changes that are worth noticing:
* skip_root_and_item_based_display_fixup is renamed to skip_item_display_fixup:
TElement::is_root() already implies being the document element, which by
definition is not native anonymous and not a pseudo-element.
Thus, you never get fixed-up if your NAC or a pseudo, which is what the code
tried to avoid, so the only fixup with a point is the item one, which is
necessary.
* The pseudo-element probing code was refactored to return early a
Option::<CascadeInputs>::None, which is nicer than what it was doing.
* The visited_links_enabled check has moved to selector-matching time. The rest
of the checks aren't based on whether the element is a link, or are properly
guarded by parent_style.visited_style().is_some() or visited_rules.is_some().
Thus you can transitively infer that no element will end up with a :visited
style, not even from style reparenting.
Anyway, the underlying reason why I want the element in StyleAdjuster is because
we're going to implement an adjustment in there depending on the tag of the
element (converting display: contents to display: none depending on the tag), so
computing that information eagerly, including a hash lookup, wouldn't be nice.
This more concrete wrapper type can write a prefix the very first time something
is written to it. This allows removing plenty of useless monomorphisations caused
by the former W/SequenceWriter<W> pair of types.
Not super-proud of this one, but it's the easiest way I could think of.
The changeset looks bigger than what it is, because while at it I've rewrapped a
fair amount of functions around to use proper block indentation.
Alternatives are parameterizing Stylist by <E>, which is not fun, or moving the
concrete element from layout_thread to layout, but that implies layout depending
on script, which isn't fun either.
Other alternative is implementing an empty enum and making anon boxes work on
it. It has the advantage of removing the annoying type parameter, but the
disadvantage of instantiating `cascade` twice, which isn't great, and having to
maintain all the boilerplate of a `TElement` implementation that just does
nothing.
style: Move cursor property out of mako
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Sub-PR of #19015
r? emilio
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- [x] These changes fix#19775 (github issue number if applicable).
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It makes no sense to pass a custom base size of zero in presence of rem, ex, or
ch units.
Bug: 1431031
Reviewed-by: Manishearth
MozReview-Commit-ID: 7ZZwRzQKREX
Returning a zero-sized viewport in the case there's no shell / pres context.
For now, no other change yet. After this we can start tweaking the ShadowRoot
Stylist setup, and even try to return computed styles without a document \o/.
Bug: 1430608
MozReview-Commit-ID: 3cT2PKQISri
That way color pickers work even when this setting is on. We always know that
pseudo-element style attributes are trusted.
Bug: 1429248
Reviewed-by: heycam
MozReview-Commit-ID: 6IdmRaMzj6I
This is a partial revert of
ce1d8cd232
If you're in a shadow tree, you may not be slotted but you still need to look at
the slotted rules, since a <slot> could be a descendant of yours.
Just use the same invalidation map everywhere, and remove complexity.
This means that we can do some extra work while trying to gather invalidation
if there are slotted rules, but I don't think it's a problem.
The test is ported from https://cs.chromium.org/chromium/src/third_party/WebKit/LayoutTests/fast/css/invalidation/slotted.html?l=1&rcl=58d68fdf783d7edde1c82a642e037464861f2787
Curiously, Blink fails the test as written, presumably because they don't flush
styles from getComputedStyle correctly (in their test they do via
updateStyleAndReturnAffectedElementCount), due to <slot>s not being in the flat
tree in their implementation.
Bug: 1429846
Reviewed-by: heycam
MozReview-Commit-ID: 6b7BQ6bGMgd
Optimize selector matching for some common cases
This is the "better way" I mentioned in #19774, which seems to actually improve the score of dromaeo_css on talos.
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In total, this PR saves ~60k.
The conditional compilation on the _Debug FFI function eliminates one
of the ToCss variants, eliminating 54.4k, as well as a bunch of other
<1k functions. Removing the public trait implementation of Debug for the
font metrics provider eliminates the last Debug impl from stylo.
MozReview-Commit-ID: nIfQ3sy4OW
