bfd354492e
With this change, we now have ~1200 CellAllocators across both LibJS and LibWeb in a normal WebContent instance. This gives us a minimum heap size of 4.7 MiB in the scenario where we only have one cell allocated per type. Of course, in practice there will be many more of each type, so the effective overhead is quite a bit smaller than that in practice. I left a few types unconverted to this mechanism because I got tired of doing this. :^)
119 lines
4.3 KiB
C++
119 lines
4.3 KiB
C++
/*
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* Copyright (c) 2021, Tim Flynn <trflynn89@serenityos.org>
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* Copyright (c) 2023, Luke Wilde <lukew@serenityos.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/Bindings/Intrinsics.h>
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#include <LibWeb/DOM/Attr.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/Element.h>
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#include <LibWeb/DOM/MutationType.h>
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#include <LibWeb/DOM/StaticNodeList.h>
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#include <LibWeb/HTML/CustomElements/CustomElementReactionNames.h>
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namespace Web::DOM {
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JS_DEFINE_ALLOCATOR(Attr);
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JS::NonnullGCPtr<Attr> Attr::create(Document& document, FlyString local_name, String value, Element* owner_element)
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{
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return document.heap().allocate<Attr>(document.realm(), document, QualifiedName(move(local_name), Optional<FlyString> {}, Optional<FlyString> {}), move(value), owner_element);
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}
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JS::NonnullGCPtr<Attr> Attr::create(Document& document, QualifiedName qualified_name, String value, Element* owner_element)
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{
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return document.heap().allocate<Attr>(document.realm(), document, move(qualified_name), move(value), owner_element);
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}
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JS::NonnullGCPtr<Attr> Attr::clone(Document& document)
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{
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return *heap().allocate<Attr>(realm(), document, m_qualified_name, m_value, nullptr);
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}
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Attr::Attr(Document& document, QualifiedName qualified_name, String value, Element* owner_element)
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: Node(document, NodeType::ATTRIBUTE_NODE)
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, m_qualified_name(move(qualified_name))
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, m_value(move(value))
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, m_owner_element(owner_element)
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{
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}
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void Attr::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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set_prototype(&Bindings::ensure_web_prototype<Bindings::AttrPrototype>(realm, "Attr"));
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}
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void Attr::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_owner_element);
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}
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Element* Attr::owner_element()
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{
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return m_owner_element.ptr();
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}
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Element const* Attr::owner_element() const
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{
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return m_owner_element.ptr();
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}
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void Attr::set_owner_element(Element* owner_element)
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{
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m_owner_element = owner_element;
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}
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// https://dom.spec.whatwg.org/#set-an-existing-attribute-value
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void Attr::set_value(String value)
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{
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// 1. If attribute’s element is null, then set attribute’s value to value.
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if (!owner_element()) {
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m_value = move(value);
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}
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// 2. Otherwise, change attribute to value.
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else {
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change_attribute(move(value));
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}
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}
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// https://dom.spec.whatwg.org/#concept-element-attributes-change
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void Attr::change_attribute(String value)
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{
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// 1. Let oldValue be attribute’s value.
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auto old_value = move(m_value);
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// 2. Set attribute’s value to value.
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m_value = move(value);
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// 3. Handle attribute changes for attribute with attribute’s element, oldValue, and value.
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handle_attribute_changes(*owner_element(), old_value, m_value);
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}
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// https://dom.spec.whatwg.org/#handle-attribute-changes
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void Attr::handle_attribute_changes(Element& element, Optional<String> const& old_value, Optional<String> const& new_value)
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{
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// 1. Queue a mutation record of "attributes" for element with attribute’s local name, attribute’s namespace, oldValue, « », « », null, and null.
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element.queue_mutation_record(MutationType::attributes, local_name(), namespace_uri(), old_value, {}, {}, nullptr, nullptr);
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// 2. If element is custom, then enqueue a custom element callback reaction with element, callback name "attributeChangedCallback", and an argument list containing attribute’s local name, oldValue, newValue, and attribute’s namespace.
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if (element.is_custom()) {
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auto& vm = this->vm();
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JS::MarkedVector<JS::Value> arguments { vm.heap() };
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arguments.append(JS::PrimitiveString::create(vm, local_name()));
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arguments.append(!old_value.has_value() ? JS::js_null() : JS::PrimitiveString::create(vm, old_value.value()));
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arguments.append(!new_value.has_value() ? JS::js_null() : JS::PrimitiveString::create(vm, new_value.value()));
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arguments.append(!namespace_uri().has_value() ? JS::js_null() : JS::PrimitiveString::create(vm, namespace_uri().value()));
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element.enqueue_a_custom_element_callback_reaction(HTML::CustomElementReactionNames::attributeChangedCallback, move(arguments));
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}
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// 3. Run the attribute change steps with element, attribute’s local name, oldValue, newValue, and attribute’s namespace.
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element.run_attribute_change_steps(local_name(), old_value, new_value, namespace_uri());
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}
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}
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