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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. All rights reserved.
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
*
* 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"
#if ENABLE(SVG)
#include "SVGLocatable.h"
#include "RenderObject.h"
#include "SVGStyledLocatableElement.h"
#include "SVGException.h"
namespace WebCore {
SVGLocatable::SVGLocatable()
{
}
SVGLocatable::~SVGLocatable()
{
}
static bool isViewportElement(Node* node)
{
return (node->hasTagName(SVGNames::svgTag)
|| node->hasTagName(SVGNames::symbolTag)
#if ENABLE(SVG_FOREIGN_OBJECT)
|| node->hasTagName(SVGNames::foreignObjectTag)
#endif
|| node->hasTagName(SVGNames::imageTag));
}
SVGElement* SVGLocatable::nearestViewportElement(const SVGElement* element)
{
ASSERT(element);
for (Node* n = element->parentNode(); n && !n->isDocumentNode(); n = n->parentNode()) {
if (isViewportElement(n))
return static_cast<SVGElement*>(n);
}
return 0;
}
SVGElement* SVGLocatable::farthestViewportElement(const SVGElement* element)
{
ASSERT(element);
SVGElement* farthest = 0;
for (Node* n = element->parentNode(); n && !n->isDocumentNode(); n = n->parentNode()) {
if (isViewportElement(n))
farthest = static_cast<SVGElement*>(n);
}
return farthest;
}
FloatRect SVGLocatable::getBBox(const SVGElement* element)
{
ASSERT(element);
element->document()->updateLayoutIgnorePendingStylesheets();
// FIXME: Eventually we should support getBBox for detached elements.
if (!element->renderer())
return FloatRect();
return element->renderer()->objectBoundingBox();
}
AffineTransform SVGLocatable::computeCTM(const SVGElement* element, CTMScope mode)
{
ASSERT(element);
element->document()->updateLayoutIgnorePendingStylesheets();
AffineTransform ctm;
SVGElement* stopAtElement = mode == NearestViewportScope ? nearestViewportElement(element) : 0;
Node* current = const_cast<SVGElement*>(element);
while (current && current->isSVGElement()) {
SVGElement* currentElement = static_cast<SVGElement*>(current);
if (currentElement->isStyled())
ctm = static_cast<SVGStyledElement*>(currentElement)->localCoordinateSpaceTransform(mode).multLeft(ctm);
// For getCTM() computation, stop at the nearest viewport element
if (currentElement == stopAtElement)
break;
current = current->isShadowNode() ? current->shadowParentNode() : current->parentNode();
}
return ctm;
}
AffineTransform SVGLocatable::getTransformToElement(SVGElement* target, ExceptionCode& ec) const
{
AffineTransform ctm = getCTM();
if (target && target->isStyledLocatable()) {
AffineTransform targetCTM = static_cast<SVGStyledLocatableElement*>(target)->getCTM();
if (!targetCTM.isInvertible()) {
ec = SVGException::SVG_MATRIX_NOT_INVERTABLE;
return ctm;
}
ctm *= targetCTM.inverse();
}
return ctm;
}
}
#endif // ENABLE(SVG)
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