ladybird/Libraries/LibWeb/SVG/SVGURIReference.h
Shannon Booth f87041bf3a LibGC+Everywhere: Factor out a LibGC from LibJS
Resulting in a massive rename across almost everywhere! Alongside the
namespace change, we now have the following names:

 * JS::NonnullGCPtr -> GC::Ref
 * JS::GCPtr -> GC::Ptr
 * JS::HeapFunction -> GC::Function
 * JS::CellImpl -> GC::Cell
 * JS::Handle -> GC::Root
2024-11-15 14:49:20 +01:00

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/*
* Copyright (c) 2023, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibWeb/SVG/AttributeNames.h>
#include <LibWeb/SVG/SVGAnimatedString.h>
namespace Web::SVG {
enum class SupportsXLinkHref {
No,
Yes,
};
// https://svgwg.org/svg2-draft/types.html#InterfaceSVGURIReference
template<SupportsXLinkHref supports_xlink_href>
class SVGURIReferenceMixin {
public:
virtual ~SVGURIReferenceMixin() = default;
GC::Ref<SVGAnimatedString> href()
{
// The href IDL attribute represents the value of the href attribute, and, on elements that are defined to support
// it, the deprecated xlink:href attribute. On getting href, an SVGAnimatedString object is returned that:
// - reflects the href attribute, and
// - if the element is defined to support the deprecated xlink:href attribute, additionally reflects that
// deprecated attribute.
if (!m_href_animated_string) {
auto* this_svg_element = dynamic_cast<SVGElement*>(this);
VERIFY(this_svg_element);
m_href_animated_string = SVGAnimatedString::create(this_svg_element->realm(), *this_svg_element, AttributeNames::href, supports_xlink_href == SupportsXLinkHref::Yes ? Optional<FlyString> { AttributeNames::xlink_href } : OptionalNone {});
}
return *m_href_animated_string;
}
protected:
void visit_edges(JS::Cell::Visitor& visitor)
{
visitor.visit(m_href_animated_string);
}
private:
GC::Ptr<SVGAnimatedString> m_href_animated_string;
};
}