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LibWeb: Implement SVGViewElement

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This identifies a particular region of an SVG image, which can then be
linked to by an SVG fragment identifier.
This commit is contained in:
Tim Ledbetter 2025-07-12 14:26:50 +01:00 • committed by Andreas Kling
commit a990de65e4
Notes: github-actions[bot] 2025-07-21 22:53:34 +00:00
15 changed files with 211 additions and 16 deletions
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72
Libraries/LibWeb/SVG/SVGViewElement.cpp Normal file
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/*
* Copyright (c) 2025, Tim Ledbetter <tim.ledbetter@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "SVGViewElement.h"
#include <LibWeb/Bindings/SVGViewElementPrototype.h>
#include <LibWeb/CSS/Parser/Parser.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/SVG/AttributeNames.h>
#include <LibWeb/SVG/SVGAnimatedRect.h>
namespace Web::SVG {
GC_DEFINE_ALLOCATOR(SVGViewElement);
SVGViewElement::SVGViewElement(DOM::Document& document, DOM::QualifiedName qualified_name)
: SVGGraphicsElement(document, move(qualified_name))
{
}
void SVGViewElement::initialize(JS::Realm& realm)
{
WEB_SET_PROTOTYPE_FOR_INTERFACE(SVGViewElement);
Base::initialize(realm);
m_view_box_for_bindings = realm.create<SVGAnimatedRect>(realm);
}
void SVGViewElement::visit_edges(Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_view_box_for_bindings);
}
bool SVGViewElement::is_presentational_hint(FlyString const& name) const
{
if (Base::is_presentational_hint(name))
return true;
return first_is_one_of(name,
SVG::AttributeNames::viewBox,
SVG::AttributeNames::preserveAspectRatio);
}
void SVGViewElement::apply_presentational_hints(GC::Ref<CSS::CascadedProperties> cascaded_properties) const
{
Base::apply_presentational_hints(cascaded_properties);
auto parsing_context = CSS::Parser::ParsingParams { document(), CSS::Parser::ParsingMode::SVGPresentationAttribute };
}
void SVGViewElement::attribute_changed(FlyString const& name, Optional<String> const& old_value, Optional<String> const& value, Optional<FlyString> const& namespace_)
{
Base::attribute_changed(name, old_value, value, namespace_);
if (name.equals_ignoring_ascii_case(SVG::AttributeNames::viewBox)) {
if (!value.has_value()) {
m_view_box_for_bindings->set_nulled(true);
} else {
m_view_box = try_parse_view_box(value.value_or(String {}));
m_view_box_for_bindings->set_nulled(!m_view_box.has_value());
if (m_view_box.has_value()) {
m_view_box_for_bindings->set_base_val(Gfx::DoubleRect { m_view_box->min_x, m_view_box->min_y, m_view_box->width, m_view_box->height });
m_view_box_for_bindings->set_anim_val(Gfx::DoubleRect { m_view_box->min_x, m_view_box->min_y, m_view_box->width, m_view_box->height });
}
}
}
if (name.equals_ignoring_ascii_case(SVG::AttributeNames::preserveAspectRatio))
m_preserve_aspect_ratio = AttributeParser::parse_preserve_aspect_ratio(value.value_or(String {}));
}
}