layout: Add initial support for the ::marker pseudo-element (#36317)

This change adds support for the `::marker` pseudo-element and ensure
that
markers are cached into the box tree. This is only initial support,
there are a few
things missing such as animations, transitions, and support the
`content` CSS
property.

Testing: There are WPT tests for this change.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2025-04-07 19:49:05 +02:00 committed by GitHub
parent a5c547259f
commit 2b63e60e8f
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27 changed files with 282 additions and 276 deletions

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@ -363,22 +363,6 @@ pub trait ThreadSafeLayoutElement<'dom>:
.clone()
}
/// Returns the already resolved style of the node.
///
/// This differs from `style(ctx)` in that if the pseudo-element has not yet
/// been computed it would panic.
///
/// This should be used just for querying layout, or when we know the
/// element style is precomputed, not from general layout itself.
#[inline]
fn resolved_style(&self) -> Arc<ComputedValues> {
let data = self.style_data();
match self.pseudo_element() {
None => data.styles.primary().clone(),
Some(pseudo_element) => data.styles.pseudos.get(&pseudo_element).unwrap().clone(),
}
}
fn is_shadow_host(&self) -> bool;
/// Returns whether this node is a body element of an html element root