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Many times, attribute mutation doesn't necessitate a full style invalidation on the element. However, the conditions are pretty elaborate, so this first version has a lot of false positives. We only need to invalidate style when any of these things apply: 1. The change may affect the match state of a selector somewhere. 2. The change may affect presentational hints applied to the element. For (1) in this first version, we have a fixed list of attribute names that may affect selectors. We also collect all names referenced by attribute selectors anywhere in the document. For (2), we add a new Element::is_presentational_hint() virtual that tells us whether a given attribute name is a presentational hint. This drastically reduces style work on many websites. As an example, https://cnn.com/ is once again browseable.
75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <andreas@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibWeb/HTML/HTMLElement.h>
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#include <LibWeb/HTML/HTMLTableCaptionElement.h>
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#include <LibWeb/HTML/HTMLTableRowElement.h>
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#include <LibWeb/HTML/HTMLTableSectionElement.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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#include <LibWeb/WebIDL/Types.h>
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namespace Web::HTML {
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class HTMLTableElement final : public HTMLElement {
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WEB_PLATFORM_OBJECT(HTMLTableElement, HTMLElement);
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GC_DECLARE_ALLOCATOR(HTMLTableElement);
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public:
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virtual ~HTMLTableElement() override;
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GC::Ptr<HTMLTableCaptionElement> caption();
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WebIDL::ExceptionOr<void> set_caption(HTMLTableCaptionElement*);
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GC::Ref<HTMLTableCaptionElement> create_caption();
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void delete_caption();
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GC::Ptr<HTMLTableSectionElement> t_head();
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WebIDL::ExceptionOr<void> set_t_head(HTMLTableSectionElement* thead);
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GC::Ref<HTMLTableSectionElement> create_t_head();
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void delete_t_head();
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GC::Ptr<HTMLTableSectionElement> t_foot();
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WebIDL::ExceptionOr<void> set_t_foot(HTMLTableSectionElement* tfoot);
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GC::Ref<HTMLTableSectionElement> create_t_foot();
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void delete_t_foot();
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GC::Ref<DOM::HTMLCollection> t_bodies();
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GC::Ref<HTMLTableSectionElement> create_t_body();
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GC::Ref<DOM::HTMLCollection> rows();
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WebIDL::ExceptionOr<GC::Ref<HTMLTableRowElement>> insert_row(WebIDL::Long index);
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WebIDL::ExceptionOr<void> delete_row(WebIDL::Long index);
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// https://www.w3.org/TR/html-aria/#el-table
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virtual Optional<ARIA::Role> default_role() const override { return ARIA::Role::table; }
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unsigned border() const;
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unsigned padding() const;
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private:
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HTMLTableElement(DOM::Document&, DOM::QualifiedName);
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virtual bool is_html_table_element() const override { return true; }
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virtual void initialize(JS::Realm&) override;
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virtual void visit_edges(Cell::Visitor&) override;
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virtual bool is_presentational_hint(FlyString const&) const override;
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virtual void apply_presentational_hints(GC::Ref<CSS::CascadedProperties>) const override;
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virtual void attribute_changed(FlyString const& name, Optional<String> const& old_value, Optional<String> const& value, Optional<FlyString> const& namespace_) override;
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GC::Ptr<DOM::HTMLCollection> mutable m_rows;
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GC::Ptr<DOM::HTMLCollection> mutable m_t_bodies;
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unsigned m_padding { 1 };
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};
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}
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namespace Web::DOM {
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template<>
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inline bool Node::fast_is<HTML::HTMLTableElement>() const { return is_html_table_element(); }
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}
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