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LibWeb: Implement the <use> SVG element

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The SVG <use> element is used to be able to reuse other SVG graphics
without having to re-write the svg element.

We now support this feature! :^)
This commit is contained in:
PrestonLTaylor 2023-05-30 21:23:52 +01:00 • committed by Andreas Kling
parent b322abd8d0
commit c7c3043aa2
10 changed files with 323 additions and 1 deletions
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55
Userland/Libraries/LibWeb/SVG/SVGElement.cpp
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@ -1,13 +1,16 @@
/*
* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
* Copyright (c) 2023, Preston Taylor <95388976+PrestonLTaylor@users.noreply.github.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Bindings/ExceptionOrUtils.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/HTML/DOMStringMap.h>
#include <LibWeb/SVG/SVGElement.h>
#include <LibWeb/SVG/SVGUseElement.h>
namespace Web::SVG {
@ -34,4 +37,56 @@ void SVGElement::visit_edges(Cell::Visitor& visitor)
visitor.visit(m_dataset);
}
void SVGElement::parse_attribute(DeprecatedFlyString const& name, DeprecatedString const& value)
{
Base::parse_attribute(name, value);
update_use_elements_that_reference_this();
}
void SVGElement::inserted()
{
Base::inserted();
update_use_elements_that_reference_this();
}
void SVGElement::children_changed()
{
Base::children_changed();
update_use_elements_that_reference_this();
}
void SVGElement::update_use_elements_that_reference_this()
{
if (is<SVGUseElement>(this)) {
return;
}
document().for_each_in_subtree_of_type<SVGUseElement>([this](SVGUseElement& use_element) {
use_element.svg_element_changed(*this);
return IterationDecision::Continue;
});
}
void SVGElement::removed_from(Node* parent)
{
Base::removed_from(parent);
remove_from_use_element_that_reference_this();
}
void SVGElement::remove_from_use_element_that_reference_this()
{
if (is<SVGUseElement>(this)) {
return;
}
document().for_each_in_subtree_of_type<SVGUseElement>([this](SVGUseElement& use_element) {
use_element.svg_element_removed(*this);
return IterationDecision::Continue;
});
}
}