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/*
* Copyright (C) 2006 Rob Buis <buis@kde.org>
* (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2008 Apple Inc. 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"
#include "CSSCursorImageValue.h"
#include "DocLoader.h"
#include "Document.h"
#include "PlatformString.h"
#include <wtf/MathExtras.h>
#include <wtf/UnusedParam.h>
#if ENABLE(SVG)
#include "SVGCursorElement.h"
#include "SVGURIReference.h"
#endif
namespace WebCore {
#if ENABLE(SVG)
static inline bool isSVGCursorIdentifier(const String& url)
{
KURL kurl(ParsedURLString, url);
return kurl.hasFragmentIdentifier();
}
static inline SVGCursorElement* resourceReferencedByCursorElement(const String& fragmentId, Document* document)
{
Element* element = document->getElementById(SVGURIReference::getTarget(fragmentId));
if (element && element->hasTagName(SVGNames::cursorTag))
return static_cast<SVGCursorElement*>(element);
return 0;
}
#endif
CSSCursorImageValue::CSSCursorImageValue(const String& url, const IntPoint& hotspot)
: CSSImageValue(url)
, m_hotspot(hotspot)
{
}
CSSCursorImageValue::~CSSCursorImageValue()
{
#if ENABLE(SVG)
const String& url = getStringValue();
if (!isSVGCursorIdentifier(url))
return;
HashSet<SVGElement*>::const_iterator it = m_referencedElements.begin();
HashSet<SVGElement*>::const_iterator end = m_referencedElements.end();
for (; it != end; ++it) {
SVGElement* referencedElement = *it;
referencedElement->setCursorImageValue(0);
if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, referencedElement->document()))
cursorElement->removeClient(referencedElement);
}
#endif
}
bool CSSCursorImageValue::updateIfSVGCursorIsUsed(Element* element)
{
#if !ENABLE(SVG)
UNUSED_PARAM(element);
#else
if (!element || !element->isSVGElement())
return false;
const String& url = getStringValue();
if (!isSVGCursorIdentifier(url))
return false;
if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, element->document())) {
float x = roundf(cursorElement->x().value(0));
m_hotspot.setX(static_cast<int>(x));
float y = roundf(cursorElement->y().value(0));
m_hotspot.setY(static_cast<int>(y));
if (cachedImageURL() != element->document()->completeURL(cursorElement->href()))
clearCachedImage();
SVGElement* svgElement = static_cast<SVGElement*>(element);
m_referencedElements.add(svgElement);
svgElement->setCursorImageValue(this);
cursorElement->addClient(svgElement);
return true;
}
#endif
return false;
}
StyleCachedImage* CSSCursorImageValue::cachedImage(DocLoader* loader)
{
String url = getStringValue();
#if ENABLE(SVG)
if (isSVGCursorIdentifier(url) && loader && loader->doc()) {
if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, loader->doc()))
url = cursorElement->href();
}
#endif
return CSSImageValue::cachedImage(loader, url);
}
#if ENABLE(SVG)
void CSSCursorImageValue::removeReferencedElement(SVGElement* element)
{
m_referencedElements.remove(element);
}
#endif
} // namespace WebCore
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