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LibWeb: Add SVGURIReference

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Luke Wilde 2023-11-14 00:20:44 +00:00 • committed by Andreas Kling
parent 55646893d8
commit 968bec9844
4 changed files with 65 additions and 2 deletions
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50
Userland/Libraries/LibWeb/SVG/SVGURIReference.h Normal file
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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;
JS::NonnullGCPtr<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:
JS::GCPtr<SVGAnimatedString> m_href_animated_string;
};
}