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layout: Implement node geometry queries against BoxTree's Fragment (#36663)

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This is a followup to #36629, continuing to implement script-based
layout queries  using the `Fragment`s attached to the `BoxTree`. In this
change, geometry queris (apart from parent offset) are calculated using
`Fragment`s hanging of the `BoxTree`.

In order to make this work, all `Fragment`s for inlines split by blocks,
need to be accessible in the `BoxTree`. This required some changes to
the way that box tree items were stored in DOM `BoxSlot`s. Now every
inline level item can have more than a single `BoxTree` item. These are
carefully collected by the `InlineFormattingContextBuilder` -- currently
a bit fragile, but with more documentation.

Testing: There are tests for these changes.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
Co-authored-by: Oriol Brufau <obrufau@igalia.com>
This commit is contained in:
Martin Robinson 2025-04-25 15:38:05 +02:00 • committed by GitHub
parent cc91395397
commit b63a1818c4
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13 changed files with 197 additions and 170 deletions
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12
components/script/dom/window.rs
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@ -2261,7 +2261,9 @@ impl Window {
// Query content box without considering any reflow
pub(crate) fn content_box_query_unchecked(&self, node: &Node) -> Option<UntypedRect<Au>> {
self.layout.borrow().query_content_box(node.to_opaque())
self.layout
.borrow()
.query_content_box(node.to_trusted_node_address())
}
pub(crate) fn content_box_query(&self, node: &Node, can_gc: CanGc) -> Option<UntypedRect<Au>> {
@ -2275,14 +2277,18 @@ impl Window {
if !self.layout_reflow(QueryMsg::ContentBoxes, can_gc) {
return vec![];
}
self.layout.borrow().query_content_boxes(node.to_opaque())
self.layout
.borrow()
.query_content_boxes(node.to_trusted_node_address())
}
pub(crate) fn client_rect_query(&self, node: &Node, can_gc: CanGc) -> UntypedRect<i32> {
if !self.layout_reflow(QueryMsg::ClientRectQuery, can_gc) {
return Rect::zero();
}
self.layout.borrow().query_client_rect(node.to_opaque())
self.layout
.borrow()
.query_client_rect(node.to_trusted_node_address())
}
/// Find the scroll area of the given node, if it is not None. If the node