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https://github.com/LadybirdBrowser/ladybird.git
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9340d2d1a3
Move the layout tree from GC allocation to refcounted ownership so removed layout and paint subtrees are destroyed synchronously instead of waiting for the next GC sweep. This dramatically reduces GC memory usage peaks after layout tree churn and makes it easier for memory use to fall back after large document updates. Update layout factories, tree traversal, SVG layout node creation, paintable back-pointers, and pseudo-element layout links to use RefPtr ownership. Make display: contents follow the same shape as Blink and WebKit: the element itself does not create a layout node, and its children are flattened into the nearest layout parent. Wrap direct non-whitespace text in an anonymous inline node when the boxless element contributes inherited style to that text. Use an internal inline wrapper for display: contents pseudo-elements so generated content can still participate in layout, painting, hit testing, and pseudo-element queries. Keep CSSOM reporting the computed display value from the pseudo style, not the internal wrapper. Remove the retained out-of-tree layout node list and its testing hook, since the flattened model does not need a side owner for boxless elements. Add coverage for inherited text style, dynamic insertion order, pseudo-element hit testing, and computed style queries.
58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/Bindings/HTMLLegendElement.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/HTML/HTMLFieldSetElement.h>
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#include <LibWeb/HTML/HTMLLegendElement.h>
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#include <LibWeb/Layout/LegendBox.h>
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namespace Web::HTML {
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GC_DEFINE_ALLOCATOR(HTMLLegendElement);
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HTMLLegendElement::HTMLLegendElement(DOM::Document& document, DOM::QualifiedName qualified_name)
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: HTMLElement(document, move(qualified_name))
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{
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}
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HTMLLegendElement::~HTMLLegendElement() = default;
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void HTMLLegendElement::initialize(JS::Realm& realm)
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{
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WEB_SET_PROTOTYPE_FOR_INTERFACE(HTMLLegendElement);
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Base::initialize(realm);
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}
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// https://html.spec.whatwg.org/multipage/form-elements.html#dom-legend-form
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HTMLFormElement* HTMLLegendElement::form()
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{
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// The form IDL attribute's behavior depends on whether the legend element is in a fieldset element or not.
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// If the legend has a fieldset element as its parent, then the form IDL attribute must return the same value as the form IDL attribute on that fieldset element.
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if (auto* field_set = as_if<HTML::HTMLFieldSetElement>(parent_element().ptr())) {
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return field_set->form();
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}
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// Otherwise, it must return null.
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return nullptr;
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}
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RefPtr<Layout::Node> HTMLLegendElement::create_layout_node(CSS::ComputedProperties const& style)
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{
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return make_ref_counted<Layout::LegendBox>(document(), *this, style);
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}
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Layout::LegendBox* HTMLLegendElement::layout_node()
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{
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return static_cast<Layout::LegendBox*>(Node::layout_node());
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}
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Layout::LegendBox const* HTMLLegendElement::layout_node() const
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{
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return static_cast<Layout::LegendBox const*>(Node::layout_node());
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}
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}
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