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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.
*
* 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"
#include "SVGNames.h"
#include "SVGUseElement.h"
namespace WebCore {
RenderSVGTransformableContainer::RenderSVGTransformableContainer(SVGGraphicsElement& element, Ref<RenderStyle>&& style)
: RenderSVGContainer(element, WTFMove(style))
, m_needsTransformUpdate(true)
, m_didTransformToRootUpdate(false)
{
}
bool RenderSVGTransformableContainer::calculateLocalTransform()
{
SVGGraphicsElement& element = graphicsElement();
// 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.
SVGUseElement* useElement = nullptr;
if (is<SVGUseElement>(element))
useElement = &downcast<SVGUseElement>(element);
else if (element.isInShadowTree() && is<SVGGElement>(element)) {
SVGElement* correspondingElement = element.correspondingElement();
if (is<SVGUseElement>(correspondingElement))
useElement = downcast<SVGUseElement>(correspondingElement);
}
if (useElement) {
SVGLengthContext lengthContext(useElement);
FloatSize translation(useElement->x().value(lengthContext), useElement->y().value(lengthContext));
if (translation != m_lastTranslation)
m_needsTransformUpdate = true;
m_lastTranslation = translation;
}
m_didTransformToRootUpdate = m_needsTransformUpdate || SVGRenderSupport::transformToRootChanged(parent());
if (!m_needsTransformUpdate)
return false;
m_localTransform = element.animatedLocalTransform();
m_localTransform.translate(m_lastTranslation.width(), m_lastTranslation.height());
m_needsTransformUpdate = false;
return true;
}
}
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