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https://github.com/LadybirdBrowser/ladybird.git
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c1d4323cf7
There are multiple things happening here which are interconnected: - We now use AbstractElement to refer to the source of a counter, which means we also need to pass that around to compute `content`. - Give AbstractElement new helper methods that are needed by CountersSet, so it doesn't have to care whether it's dealing with a true Element or PseudoElement. - The CountersSet algorithms now walk the layout tree instead of DOM tree, so TreeBuilder needs to wait until the layout node exists before it resolves counters for it. - Resolve counters when creating a pseudo-element's layout node. We awkwardly compute the `content` value up to twice: Once to figure out what kind of node we need to make, and then if it's a string, we do so again after counters are resolved so we can get the true value of any `counter()` functions. This will need adjusting in the future but it works for now.
120 lines
3.5 KiB
C++
120 lines
3.5 KiB
C++
/*
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* Copyright (c) 2024-2025, Sam Atkins <sam@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/DOM/AbstractElement.h>
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#include <LibWeb/DOM/Element.h>
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#include <LibWeb/Layout/Node.h>
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namespace Web::DOM {
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AbstractElement::AbstractElement(GC::Ref<Element> element, Optional<CSS::PseudoElement> pseudo_element)
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: m_element(element)
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, m_pseudo_element(move(pseudo_element))
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{
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}
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void AbstractElement::visit(GC::Cell::Visitor& visitor) const
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{
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visitor.visit(m_element);
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}
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GC::Ptr<Layout::NodeWithStyle> AbstractElement::layout_node()
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{
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if (m_pseudo_element.has_value())
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return m_element->get_pseudo_element_node(*m_pseudo_element);
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return m_element->layout_node();
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}
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GC::Ptr<Element const> AbstractElement::parent_element() const
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{
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if (m_pseudo_element.has_value())
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return m_element;
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return m_element->parent_element();
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}
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Optional<AbstractElement> AbstractElement::walk_layout_tree(WalkMethod walk_method)
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{
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GC::Ptr<Layout::Node> node = layout_node();
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if (!node)
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return OptionalNone {};
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while (true) {
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switch (walk_method) {
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case WalkMethod::Previous:
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node = node->previous_in_pre_order();
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break;
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case WalkMethod::PreviousSibling:
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node = node->previous_sibling();
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break;
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}
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if (!node)
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return OptionalNone {};
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if (auto* previous_element = as_if<Element>(node->dom_node()))
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return AbstractElement { *previous_element };
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if (node->is_generated())
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return AbstractElement { *node->pseudo_element_generator(), node->generated_for_pseudo_element() };
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}
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}
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bool AbstractElement::is_before(AbstractElement const& other) const
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{
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auto this_node = layout_node();
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auto other_node = other.layout_node();
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return this_node && other_node && this_node->is_before(*other_node);
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}
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GC::Ptr<CSS::ComputedProperties const> AbstractElement::computed_properties() const
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{
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if (m_pseudo_element.has_value())
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return m_element->pseudo_element_computed_properties(*m_pseudo_element);
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return m_element->computed_properties();
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}
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bool AbstractElement::has_non_empty_counters_set() const
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{
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if (m_pseudo_element.has_value())
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return m_element->get_pseudo_element(*m_pseudo_element)->has_non_empty_counters_set();
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return m_element->has_non_empty_counters_set();
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}
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Optional<CSS::CountersSet const&> AbstractElement::counters_set() const
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{
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if (m_pseudo_element.has_value())
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return m_element->get_pseudo_element(*m_pseudo_element)->counters_set();
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return m_element->counters_set();
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}
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CSS::CountersSet& AbstractElement::ensure_counters_set()
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{
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if (m_pseudo_element.has_value())
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return m_element->get_pseudo_element(*m_pseudo_element)->ensure_counters_set();
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return m_element->ensure_counters_set();
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}
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void AbstractElement::set_counters_set(OwnPtr<CSS::CountersSet>&& counters_set)
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{
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if (m_pseudo_element.has_value()) {
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m_element->get_pseudo_element(*m_pseudo_element)->set_counters_set(move(counters_set));
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} else {
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m_element->set_counters_set(move(counters_set));
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}
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}
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String AbstractElement::debug_description() const
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{
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if (m_pseudo_element.has_value()) {
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StringBuilder builder;
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builder.append(m_element->debug_description());
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builder.append("::"sv);
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builder.append(CSS::pseudo_element_name(*m_pseudo_element));
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return builder.to_string_without_validation();
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}
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return m_element->debug_description();
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}
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}
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