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layout: Implement node geometry queries against BoxTree
's Fragment
(#36663)
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>
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13 changed files with 197 additions and 170 deletions
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@ -195,16 +195,17 @@ impl BoxTree {
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},
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_ => return None,
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},
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LayoutBox::InlineLevel(inline_level_box) => match &*inline_level_box.borrow() {
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InlineItem::OutOfFlowAbsolutelyPositionedBox(_, text_offset_index)
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if box_style.position.is_absolutely_positioned() =>
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{
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UpdatePoint::AbsolutelyPositionedInlineLevelBox(
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inline_level_box.clone(),
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*text_offset_index,
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)
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},
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_ => return None,
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LayoutBox::InlineLevel(inline_level_items) => {
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let inline_level_box = inline_level_items.first()?;
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let InlineItem::OutOfFlowAbsolutelyPositionedBox(_, text_offset_index) =
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&*inline_level_box.borrow()
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else {
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return None;
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};
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UpdatePoint::AbsolutelyPositionedInlineLevelBox(
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inline_level_box.clone(),
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*text_offset_index,
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)
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},
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LayoutBox::FlexLevel(flex_level_box) => match &*flex_level_box.borrow() {
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FlexLevelBox::OutOfFlowAbsolutelyPositionedBox(_)
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