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b981e6f7bc
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.
96 lines
3.2 KiB
C++
96 lines
3.2 KiB
C++
/*
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* Copyright (c) 2022, 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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#include <LibWeb/Bindings/ExceptionOrUtils.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/Bindings/SVGForeignObjectElementPrototype.h>
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#include <LibWeb/CSS/Parser/Parser.h>
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#include <LibWeb/Layout/BlockContainer.h>
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#include <LibWeb/Layout/SVGForeignObjectBox.h>
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#include <LibWeb/SVG/AttributeNames.h>
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#include <LibWeb/SVG/SVGAnimatedLength.h>
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#include <LibWeb/SVG/SVGForeignObjectElement.h>
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#include <LibWeb/SVG/SVGLength.h>
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namespace Web::SVG {
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GC_DEFINE_ALLOCATOR(SVGForeignObjectElement);
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SVGForeignObjectElement::SVGForeignObjectElement(DOM::Document& document, DOM::QualifiedName qualified_name)
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: SVGGraphicsElement(document, move(qualified_name))
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{
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}
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SVGForeignObjectElement::~SVGForeignObjectElement() = default;
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void SVGForeignObjectElement::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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WEB_SET_PROTOTYPE_FOR_INTERFACE(SVGForeignObjectElement);
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// FIXME: These never actually get updated!
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m_x = SVGAnimatedLength::create(realm, SVGLength::create(realm, 0, 0), SVGLength::create(realm, 0, 0));
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m_y = SVGAnimatedLength::create(realm, SVGLength::create(realm, 0, 0), SVGLength::create(realm, 0, 0));
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m_width = SVGAnimatedLength::create(realm, SVGLength::create(realm, 0, 0), SVGLength::create(realm, 0, 0));
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m_height = SVGAnimatedLength::create(realm, SVGLength::create(realm, 0, 0), SVGLength::create(realm, 0, 0));
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}
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void SVGForeignObjectElement::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_x);
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visitor.visit(m_y);
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visitor.visit(m_width);
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visitor.visit(m_height);
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}
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GC::Ptr<Layout::Node> SVGForeignObjectElement::create_layout_node(GC::Ref<CSS::ComputedProperties> style)
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{
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return heap().allocate<Layout::SVGForeignObjectBox>(document(), *this, move(style));
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}
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bool SVGForeignObjectElement::is_presentational_hint(FlyString const& name) const
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{
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if (Base::is_presentational_hint(name))
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return true;
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return first_is_one_of(name,
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SVG::AttributeNames::width,
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SVG::AttributeNames::height);
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}
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void SVGForeignObjectElement::apply_presentational_hints(GC::Ref<CSS::CascadedProperties> cascaded_properties) const
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{
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Base::apply_presentational_hints(cascaded_properties);
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auto parsing_context = CSS::Parser::ParsingContext { document() };
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if (auto width_value = parse_css_value(parsing_context, get_attribute_value(Web::HTML::AttributeNames::width), CSS::PropertyID::Width))
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cascaded_properties->set_property_from_presentational_hint(CSS::PropertyID::Width, width_value.release_nonnull());
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if (auto height_value = parse_css_value(parsing_context, get_attribute_value(Web::HTML::AttributeNames::height), CSS::PropertyID::Height))
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cascaded_properties->set_property_from_presentational_hint(CSS::PropertyID::Height, height_value.release_nonnull());
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}
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GC::Ref<SVG::SVGAnimatedLength> SVGForeignObjectElement::x()
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{
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return *m_x;
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}
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GC::Ref<SVG::SVGAnimatedLength> SVGForeignObjectElement::y()
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{
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return *m_y;
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}
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GC::Ref<SVG::SVGAnimatedLength> SVGForeignObjectElement::width()
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{
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return *m_width;
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}
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GC::Ref<SVG::SVGAnimatedLength> SVGForeignObjectElement::height()
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{
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return *m_height;
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}
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}
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