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/*
Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
This file is part of the KDE project
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 "wtf/Platform.h"
#if ENABLE(SVG)
#include "SVGElementInstance.h"
/*#include "Event.h"
#include "EventListener.h"*/
#include "SVGElementInstanceList.h"
#include "SVGUseElement.h"
#include <wtf/Assertions.h>
namespace WebCore {
SVGElementInstance::SVGElementInstance(SVGUseElement* useElement, PassRefPtr<SVGElement> originalElement)
: m_refCount(0)
, m_parent(0)
, m_useElement(useElement)
, m_element(originalElement)
, m_shadowTreeElement(0)
, m_previousSibling(0)
, m_nextSibling(0)
, m_firstChild(0)
, m_lastChild(0)
{
ASSERT(m_useElement);
ASSERT(m_element);
// Register as instance for passed element.
m_element->document()->accessSVGExtensions()->mapInstanceToElement(this, m_element.get());
}
SVGElementInstance::~SVGElementInstance()
{
for (RefPtr<SVGElementInstance> child = m_firstChild; child; child = child->m_nextSibling)
child->setParent(0);
// Deregister as instance for passed element.
m_element->document()->accessSVGExtensions()->removeInstanceMapping(this, m_element.get());
}
SVGElement* SVGElementInstance::correspondingElement() const
{
return m_element.get();
}
SVGUseElement* SVGElementInstance::correspondingUseElement() const
{
return m_useElement;
}
SVGElementInstance* SVGElementInstance::parentNode() const
{
return parent();
}
PassRefPtr<SVGElementInstanceList> SVGElementInstance::childNodes()
{
return SVGElementInstanceList::create(this);
}
SVGElementInstance* SVGElementInstance::previousSibling() const
{
return m_previousSibling;
}
SVGElementInstance* SVGElementInstance::nextSibling() const
{
return m_nextSibling;
}
SVGElementInstance* SVGElementInstance::firstChild() const
{
return m_firstChild;
}
SVGElementInstance* SVGElementInstance::lastChild() const
{
return m_lastChild;
}
SVGElement* SVGElementInstance::shadowTreeElement() const
{
return m_shadowTreeElement;
}
void SVGElementInstance::setShadowTreeElement(SVGElement* element)
{
ASSERT(element);
m_shadowTreeElement = element;
}
void SVGElementInstance::appendChild(PassRefPtr<SVGElementInstance> child)
{
child->setParent(this);
if (m_lastChild) {
child->m_previousSibling = m_lastChild;
m_lastChild->m_nextSibling = child.get();
} else
m_firstChild = child.get();
m_lastChild = child.get();
}
// Helper function for updateInstance
static bool containsUseChildNode(Node* start)
{
if (start->hasTagName(SVGNames::useTag))
return true;
for (Node* current = start->firstChild(); current; current = current->nextSibling()) {
if (containsUseChildNode(current))
return true;
}
return false;
}
void SVGElementInstance::updateInstance(SVGElement* element)
{
ASSERT(element == m_element);
ASSERT(m_shadowTreeElement);
// TODO: Eventually come up with a more optimized updating logic for the cases below:
//
// <symbol>: We can't just clone the original element, we need to apply
// the same "replace by generated content" logic that SVGUseElement does.
//
// <svg>: <use> on <svg> is too rare to actually implement it faster.
// If someone still wants to do it: recloning, adjusting width/height attributes is enough.
//
// <use>: Too hard to get it right in a fast way. Recloning seems the only option.
if (m_element->hasTagName(SVGNames::symbolTag) ||
m_element->hasTagName(SVGNames::svgTag) ||
containsUseChildNode(m_element.get())) {
m_useElement->buildPendingResource();
return;
}
// For all other nodes this logic is sufficient.
WTF::PassRefPtr<Node> clone = m_element->cloneNode(true);
SVGUseElement::removeDisallowedElementsFromSubtree(clone.get());
SVGElement* svgClone = 0;
if (clone && clone->isSVGElement())
svgClone = static_cast<SVGElement*>(clone.get());
ASSERT(svgClone);
// Replace node in the <use> shadow tree
/*ExceptionCode*//*khtml*/int ec = 0;
m_shadowTreeElement->parentNode()->replaceChild(clone.releaseRef(), m_shadowTreeElement, ec);
ASSERT(ec == 0);
m_shadowTreeElement = svgClone;
}
SVGElementInstance* SVGElementInstance::toSVGElementInstance()
{
return this;
}
EventTargetNode* SVGElementInstance::toNode()
{
return m_element.get();
}
void SVGElementInstance::addEventListener(const AtomicString& eventType, PassRefPtr<EventListener> eventListener, bool useCapture)
{
// FIXME!
}
void SVGElementInstance::removeEventListener(const AtomicString& eventType, EventListener* eventListener, bool useCapture)
{
// FIXME!
}
bool SVGElementInstance::dispatchEvent(PassRefPtr<Event>, ExceptionCode& ec, bool tempEvent)
{
// FIXME!
return false;
}
}
#endif // ENABLE(SVG)
// vim:ts=4:noet
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