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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.
111 lines
3.5 KiB
C++
111 lines
3.5 KiB
C++
/*
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* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
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* Copyright (c) 2021-2022, Sam Atkins <atkinssj@serenityos.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 <LibGfx/PaintStyle.h>
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#include <LibWeb/DOM/Node.h>
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#include <LibWeb/SVG/AttributeParser.h>
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#include <LibWeb/SVG/SVGAnimatedTransformList.h>
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#include <LibWeb/SVG/SVGElement.h>
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#include <LibWeb/SVG/SVGGradientElement.h>
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#include <LibWeb/SVG/TagNames.h>
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#include <LibWeb/SVG/ViewBox.h>
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namespace Web::SVG {
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struct SVGBoundingBoxOptions {
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bool fill { true };
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bool stroke { false };
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bool markers { false };
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bool clipped { false };
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};
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class SVGGraphicsElement : public SVGElement {
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WEB_PLATFORM_OBJECT(SVGGraphicsElement, SVGElement);
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public:
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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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Optional<Gfx::Color> fill_color() const;
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Optional<Gfx::Color> stroke_color() const;
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Vector<float> stroke_dasharray() const;
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Optional<float> stroke_dashoffset() const;
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Optional<float> stroke_width() const;
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Optional<float> fill_opacity() const;
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Optional<CSS::StrokeLinecap> stroke_linecap() const;
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Optional<CSS::StrokeLinejoin> stroke_linejoin() const;
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Optional<CSS::NumberOrCalculated> stroke_miterlimit() const;
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Optional<float> stroke_opacity() const;
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Optional<FillRule> fill_rule() const;
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Optional<ClipRule> clip_rule() const;
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float visible_stroke_width() const
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{
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if (auto color = stroke_color(); color.has_value() && color->alpha() > 0)
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return stroke_width().value_or(0);
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return 0;
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}
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Gfx::AffineTransform get_transform() const;
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Optional<Painting::PaintStyle> fill_paint_style(SVGPaintContext const&) const;
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Optional<Painting::PaintStyle> stroke_paint_style(SVGPaintContext const&) const;
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GC::Ptr<SVG::SVGMaskElement const> mask() const;
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GC::Ptr<SVG::SVGClipPathElement const> clip_path() const;
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GC::Ref<Geometry::DOMRect> get_b_box(Optional<SVGBoundingBoxOptions>);
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GC::Ref<SVGAnimatedTransformList> transform() const;
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GC::Ptr<Geometry::DOMMatrix> get_screen_ctm();
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protected:
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SVGGraphicsElement(DOM::Document&, DOM::QualifiedName);
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virtual void initialize(JS::Realm&) override;
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virtual Gfx::AffineTransform element_transform() const
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{
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return m_transform;
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}
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Optional<Painting::PaintStyle> svg_paint_computed_value_to_gfx_paint_style(SVGPaintContext const& paint_context, Optional<CSS::SVGPaint> const& paint_value) const;
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Gfx::AffineTransform m_transform = {};
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template<typename T>
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GC::Ptr<T> try_resolve_url_to(URL::URL const& url) const
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{
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if (!url.fragment().has_value())
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return {};
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auto node = document().get_element_by_id(*url.fragment());
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if (!node)
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return {};
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if (is<T>(*node))
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return static_cast<T&>(*node);
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return {};
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}
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private:
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virtual bool is_svg_graphics_element() const final { return true; }
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float resolve_relative_to_viewport_size(CSS::LengthPercentage const& length_percentage) const;
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};
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Gfx::AffineTransform transform_from_transform_list(ReadonlySpan<Transform> transform_list);
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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<SVG::SVGGraphicsElement>() const { return is_svg_graphics_element(); }
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}
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