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e87fece8c6
SVG elements (except the outermost <svg>) use SVG's coordinate system, not the CSS box model, so CSS positioning doesn't apply to them. This adds SVGElement::adjust_computed_style() to force position:static on all SVG elements except the outermost <svg> element (which has no owner_svg_element()). SVGSymbolElement's existing override now calls Base::adjust_computed_style() to inherit this behavior. With this in place, the FIXME in layout_absolutely_positioned_element() for SVG boxes becomes unreachable and is replaced with VERIFY_NOT_REACHED().
75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
/*
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* Copyright (c) 2023, Preston Taylor <95388976+PrestonLTaylor@users.noreply.github.com>
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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/Bindings/SVGSymbolElementPrototype.h>
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#include <LibWeb/CSS/ComputedProperties.h>
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#include <LibWeb/CSS/StyleValues/DisplayStyleValue.h>
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#include <LibWeb/DOM/ShadowRoot.h>
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#include <LibWeb/Layout/SVGGraphicsBox.h>
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#include <LibWeb/SVG/SVGSymbolElement.h>
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#include <LibWeb/SVG/SVGUseElement.h>
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namespace Web::SVG {
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GC_DEFINE_ALLOCATOR(SVGSymbolElement);
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SVGSymbolElement::SVGSymbolElement(DOM::Document& document, DOM::QualifiedName qualified_name)
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: SVGGraphicsElement(document, qualified_name)
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{
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}
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void SVGSymbolElement::initialize(JS::Realm& realm)
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{
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WEB_SET_PROTOTYPE_FOR_INTERFACE(SVGSymbolElement);
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Base::initialize(realm);
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SVGFitToViewBox::initialize(realm);
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}
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void SVGSymbolElement::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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SVGFitToViewBox::visit_edges(visitor);
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}
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void SVGSymbolElement::adjust_computed_style(CSS::ComputedProperties& computed_properties)
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{
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Base::adjust_computed_style(computed_properties);
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if (is_direct_child_of_use_shadow_tree()) {
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// The generated instance of a ‘symbol’ that is the direct referenced element of a ‘use’ element must always have a computed value of inline for the display property.
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computed_properties.set_property(CSS::PropertyID::Display, CSS::DisplayStyleValue::create(CSS::Display::from_short(CSS::Display::Short::Inline)));
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}
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}
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void SVGSymbolElement::attribute_changed(FlyString const& name, Optional<String> const& old_value, Optional<String> const& value, Optional<FlyString> const& namespace_)
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{
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Base::attribute_changed(name, old_value, value, namespace_);
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SVGFitToViewBox::attribute_changed(*this, name, value);
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}
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bool SVGSymbolElement::is_direct_child_of_use_shadow_tree() const
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{
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auto maybe_shadow_root = parent();
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if (!is<DOM::ShadowRoot>(maybe_shadow_root)) {
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return false;
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}
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auto host = static_cast<DOM::ShadowRoot const&>(*maybe_shadow_root).host();
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return is<SVGUseElement>(host);
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}
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GC::Ptr<Layout::Node> SVGSymbolElement::create_layout_node(GC::Ref<CSS::ComputedProperties> style)
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{
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// https://svgwg.org/svg2-draft/render.html#TermNeverRenderedElement
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// [..] it also includes a ‘symbol’ element that is not the instance root of a use-element shadow tree.
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if (!is_direct_child_of_use_shadow_tree())
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return {};
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return heap().allocate<Layout::SVGGraphicsBox>(document(), *this, style);
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}
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}
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