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LibWeb: Generate ::backdrop pseudo-elements

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Gingeh 2025-04-07 18:39:32 +10:00 • committed by Sam Atkins
commit 4b9f5c6fb8
Notes: github-actions[bot] 2025-04-09 11:11:48 +00:00
11 changed files with 145 additions and 2 deletions
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21
Libraries/LibWeb/Layout/TreeBuilder.cpp
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@ -567,8 +567,27 @@ void TreeBuilder::update_layout_tree(DOM::Node& dom_node, TreeBuilder::Context&
// generate boxes as if they were siblings of the root element.
TemporaryChange<bool> layout_mask(context.layout_top_layer, true);
for (auto const& top_layer_element : document.top_layer_elements()) {
if (top_layer_element->rendered_in_top_layer())
if (top_layer_element->rendered_in_top_layer()) {
// Each element rendered in the top layer has a ::backdrop pseudo-element, for which it is the originating element.
[&]() {
if (top_layer_element->has_inclusive_ancestor_with_display_none())
return;
auto pseudo_element_style = top_layer_element->pseudo_element_computed_properties(CSS::PseudoElement::Backdrop);
if (!pseudo_element_style)
return;
auto pseudo_element_display = pseudo_element_style->display();
auto pseudo_element_node = DOM::Element::create_layout_node_for_display_type(document, pseudo_element_display, *pseudo_element_style, nullptr);
if (!pseudo_element_node)
return;
top_layer_element->set_pseudo_element_node({}, CSS::PseudoElement::Backdrop, pseudo_element_node);
insert_node_into_inline_or_block_ancestor(*pseudo_element_node, pseudo_element_display, AppendOrPrepend::Append);
}();
update_layout_tree(top_layer_element, context, should_create_layout_node ? MustCreateSubtree::Yes : MustCreateSubtree::No);
}
}
}
pop_parent();