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/*
* Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
* Copyright (C) 2009 Google, Inc.
* Copyright (c) 2020, 2021, 2022 Igalia S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "RenderSVGTransformableContainer.h"
#if ENABLE(LAYER_BASED_SVG_ENGINE)
#include "RenderSVGModelObjectInlines.h"
#include "SVGContainerLayout.h"
#include "SVGElementTypeHelpers.h"
#include "SVGGElement.h"
#include "SVGGraphicsElement.h"
#include "SVGUseElement.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(RenderSVGTransformableContainer);
RenderSVGTransformableContainer::RenderSVGTransformableContainer(SVGGraphicsElement& element, RenderStyle&& style)
: RenderSVGContainer(element, WTFMove(style))
{
}
SVGGraphicsElement& RenderSVGTransformableContainer::graphicsElement() const
{
return downcast<SVGGraphicsElement>(RenderSVGContainer::element());
}
inline SVGUseElement* associatedUseElement(SVGGraphicsElement& element)
{
// If we're either the renderer for a <use> element, or for any <g> element inside the shadow
// tree, that was created during the use/symbol/svg expansion in SVGUseElement. These containers
// need to respect the translations induced by their corresponding use elements x/y attributes.
if (is<SVGUseElement>(element))
return &downcast<SVGUseElement>(element);
if (element.isInShadowTree() && is<SVGGElement>(element)) {
SVGElement* correspondingElement = element.correspondingElement();
if (is<SVGUseElement>(correspondingElement))
return downcast<SVGUseElement>(correspondingElement);
}
return nullptr;
}
FloatSize RenderSVGTransformableContainer::additionalContainerTranslation() const
{
if (auto* useElement = associatedUseElement(graphicsElement())) {
SVGLengthContext lengthContext(useElement);
return { useElement->x().value(lengthContext), useElement->y().value(lengthContext) };
}
return { };
}
bool RenderSVGTransformableContainer::needsHasSVGTransformFlags() const
{
return graphicsElement().hasTransformRelatedAttributes() || associatedUseElement(graphicsElement());
}
void RenderSVGTransformableContainer::updateLayerTransform()
{
// First update the supplemental layer transform...
m_supplementalLayerTransform = AffineTransform::makeTranslation(additionalContainerTranslation());
// ... before being able to use it in RenderLayerModelObject::updateLayerTransform().
RenderSVGContainer::updateLayerTransform();
}
void RenderSVGTransformableContainer::applyTransform(TransformationMatrix& transform, const RenderStyle& style, const FloatRect& boundingBox, OptionSet<RenderStyle::TransformOperationOption> options) const
{
auto postTransform = m_supplementalLayerTransform.isIdentity() ? std::nullopt : std::make_optional(m_supplementalLayerTransform);
applySVGTransform(transform, graphicsElement(), style, boundingBox, std::nullopt, postTransform, options);
}
}
#endif // ENABLE(LAYER_BASED_SVG_ENGINE)
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