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script/layout: Ensure a StackingContextTree before IntersectionObserver geometry queries (#38473)

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IntersectionObserver needs to be able to query node geometry without
forcing a layout. A previous layout could have run without needing a
`StackingContextTree`. In that case the layout-less query should finish
building the `StackingContextTree` before doing the query.  Add a new
type of layout API which requests that layout finishes building the
StackingContextTree.

This change also slightly simplifies and corrects the naming of
`Element` APIs around client box queries.

Testing: This should fix intermittent failures in WPT tests.
Fixes: #38380.
Fixes: #38390.
Closes: #38400.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2025-08-06 15:46:43 +02:00 • committed by GitHub
parent 757dbc0eda
commit 44a11a7c6c
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12 changed files with 78 additions and 59 deletions
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12
components/script/dom/node.rs
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@ -942,20 +942,10 @@ impl Node {
TrustedNodeAddress(self as *const Node as *const libc::c_void)
}
/// Returns the rendered bounding content box if the element is rendered,
/// and none otherwise.
pub(crate) fn bounding_content_box(&self) -> Option<Rect<Au>> {
pub(crate) fn content_box(&self) -> Option<Rect<Au>> {
self.owner_window().content_box_query(self)
}
pub(crate) fn bounding_content_box_or_zero(&self) -> Rect<Au> {
self.bounding_content_box().unwrap_or_else(Rect::zero)
}
pub(crate) fn bounding_content_box_no_reflow(&self) -> Option<Rect<Au>> {
self.owner_window().content_box_query_unchecked(self)
}
pub(crate) fn content_boxes(&self) -> Vec<Rect<Au>> {
self.owner_window().content_boxes_query(self)
}