WebCore/svg/SVGElement.cpp - WebKit - Git at Google

 /*
     Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
                   2004, 2005, 2006 Rob Buis <buis@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"

 #if ENABLE(SVG)
 #include "SVGElement.h"

 #include "DOMImplementation.h"
 #include "Document.h"
 #include "Event.h"
 #include "EventListener.h"
 #include "EventNames.h"
 #include "FrameView.h"
 #include "HTMLNames.h"
 #include "PlatformString.h"
 #include "RenderObject.h"
 #include "SVGDocumentExtensions.h"
 #include "SVGElementInstance.h"
 #include "SVGNames.h"
 #include "SVGSVGElement.h"
 #include "SVGURIReference.h"
 #include "SVGUseElement.h"
 #include "XMLNames.h"

 namespace WebCore {

 using namespace HTMLNames;
 using namespace EventNames;

 SVGElement::SVGElement(const QualifiedName& tagName, Document* doc)
     : StyledElement(tagName, doc)
     , m_shadowParent(0)
 {
 }

 SVGElement::~SVGElement()
 {
 }

 bool SVGElement::isSupported(StringImpl* feature, StringImpl* version) const
 {
     if (DOMImplementation::instance()->hasFeature(feature, version))
         return true;

     return DOMImplementation::instance()->hasFeature(feature, version);
 }

 String SVGElement::id() const
 {
     return getAttribute(idAttr);
 }

 void SVGElement::setId(const String& value, ExceptionCode&)
 {
     setAttribute(idAttr, value);
 }

 String SVGElement::xmlbase() const
 {
     return getAttribute(XMLNames::baseAttr);
 }

 void SVGElement::setXmlbase(const String& value, ExceptionCode&)
 {
     setAttribute(XMLNames::baseAttr, value);
 }

 SVGSVGElement* SVGElement::ownerSVGElement() const
 {
     Node* n = parentNode();
     while (n) {
         if (n->hasTagName(SVGNames::svgTag))
             return static_cast<SVGSVGElement*>(n);

         n = n->parentNode();
     }

     return 0;
 }

 SVGElement* SVGElement::viewportElement() const
 {
     // This function needs shadow tree support - as RenderSVGContainer uses this function
     // to determine the "overflow" property. <use> on <symbol> wouldn't work otherwhise.
     Node* n = isShadowNode() ? const_cast<SVGElement*>(this)->shadowParentNode() : parentNode();
     while (n) {
         if (n->hasTagName(SVGNames::svgTag) || n->hasTagName(SVGNames::imageTag) || n->hasTagName(SVGNames::symbolTag))
             return static_cast<SVGElement*>(n);

         n = n->isShadowNode() ? n->shadowParentNode() : n->parentNode();
     }

     return 0;
 }

 void SVGElement::addSVGEventListener(const AtomicString& eventType, const Attribute* attr)
 {
     Element::setHTMLEventListener(eventType, document()->accessSVGExtensions()->
         createSVGEventListener(attr->localName().string(), attr->value(), this));
 }

 void SVGElement::parseMappedAttribute(MappedAttribute* attr)
 {
     // standard events
     if (attr->name() == onloadAttr)
         addSVGEventListener(loadEvent, attr);
     else if (attr->name() == onclickAttr)
         addSVGEventListener(clickEvent, attr);
     else if (attr->name() == onmousedownAttr)
         addSVGEventListener(mousedownEvent, attr);
     else if (attr->name() == onmousemoveAttr)
         addSVGEventListener(mousemoveEvent, attr);
     else if (attr->name() == onmouseoutAttr)
         addSVGEventListener(mouseoutEvent, attr);
     else if (attr->name() == onmouseoverAttr)
         addSVGEventListener(mouseoverEvent, attr);
     else if (attr->name() == onmouseupAttr)
         addSVGEventListener(mouseupEvent, attr);
     else if (attr->name() == SVGNames::onfocusinAttr)
         addSVGEventListener(DOMFocusInEvent, attr);
     else if (attr->name() == SVGNames::onfocusoutAttr)
         addSVGEventListener(DOMFocusOutEvent, attr);
     else if (attr->name() == SVGNames::onactivateAttr)
         addSVGEventListener(DOMActivateEvent, attr);
     else
         StyledElement::parseMappedAttribute(attr);
 }

 bool SVGElement::haveLoadedRequiredResources()
 {
     Node* child = firstChild();
     while (child) {
         if (child->isSVGElement() && !static_cast<SVGElement*>(child)->haveLoadedRequiredResources())
             return false;
         child = child->nextSibling();
     }
     return true;
 }

 void SVGElement::sendSVGLoadEventIfPossible(bool sendParentLoadEvents)
 {
     RefPtr<SVGElement> currentTarget = this;
     while (currentTarget && currentTarget->haveLoadedRequiredResources()) {
         RefPtr<Node> parent;
         if (sendParentLoadEvents)
             parent = currentTarget->parentNode(); // save the next parent to dispatch too incase dispatching the event changes the tree

         // FIXME: This malloc could be avoided by walking the tree first to check if any listeners are present: http://bugs.webkit.org/show_bug.cgi?id=10264
         RefPtr<Event> event = new Event(loadEvent, false, false);
         event->setTarget(currentTarget);
         ExceptionCode ignored = 0;
         dispatchGenericEvent(this, event.release(), ignored, false);
         currentTarget = (parent && parent->isSVGElement()) ? static_pointer_cast<SVGElement>(parent) : 0;
     }
 }

 void SVGElement::finishParsingChildren()
 {
     // finishParsingChildren() is called when the close tag is reached for an element (e.g. </svg>)
     // we send SVGLoad events here if we can, otherwise they'll be sent when any required loads finish
     sendSVGLoadEventIfPossible();
 }

 bool SVGElement::childShouldCreateRenderer(Node* child) const
 {
     if (child->isSVGElement())
         return static_cast<SVGElement*>(child)->isValid();
     return false;
 }

 void SVGElement::insertedIntoDocument()
 {
     StyledElement::insertedIntoDocument();
     SVGDocumentExtensions* extensions = document()->accessSVGExtensions();

     String resourceId = SVGURIReference::getTarget(id());
     if (extensions->isPendingResource(resourceId)) {
         std::auto_ptr<HashSet<SVGStyledElement*> > clients(extensions->removePendingResource(resourceId));
         if (clients->isEmpty())
             return;

         HashSet<SVGStyledElement*>::const_iterator it = clients->begin();
         const HashSet<SVGStyledElement*>::const_iterator end = clients->end();

         for (; it != end; ++it)
             (*it)->buildPendingResource();

         SVGResource::invalidateClients(*clients);
     }
 }

 static Node* shadowTreeParentElementForShadowTreeElement(Node* node)
 {
     for (Node* n = node; n; n = n->parentNode()) {
         if (n->isShadowNode())
             return n->shadowParentNode();
     }

     return 0;
 }

 bool SVGElement::dispatchEvent(PassRefPtr<Event> e, ExceptionCode& ec, bool tempEvent)
 {
     // TODO: This function will be removed in a follow-up patch!

     EventTarget* target = this;
     Node* useNode = shadowTreeParentElementForShadowTreeElement(this);

     // If we are a hidden shadow tree element, the target must
     // point to our corresponding SVGElementInstance object
     if (useNode) {
         ASSERT(useNode->hasTagName(SVGNames::useTag));
         SVGUseElement* use = static_cast<SVGUseElement*>(useNode);

         SVGElementInstance* instance = use->instanceForShadowTreeElement(this);

         if (instance)
             target = instance;
     }

     e->setTarget(target);

     RefPtr<FrameView> view = document()->view();
     return EventTargetNode::dispatchGenericEvent(this, e, ec, tempEvent);
 }

 void SVGElement::attributeChanged(Attribute* attr, bool preserveDecls)
 {
     ASSERT(attr);
     if (!attr)
         return;

     StyledElement::attributeChanged(attr, preserveDecls);
     svgAttributeChanged(attr->name());
 }

 const AtomicString& SVGElement::getAttribute(const String& name) const
 {
     invokeSVGPropertySynchronizer(name.impl());
     return StyledElement::getAttribute(name);
 }

 const AtomicString& SVGElement::getAttribute(const QualifiedName& name) const
 {
     invokeSVGPropertySynchronizer(name.localName().impl());
     return StyledElement::getAttribute(name);
 }

 }

 #endif // ENABLE(SVG)
	/*
	Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
	2004, 2005, 2006 Rob Buis <buis@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"

	#if ENABLE(SVG)
	#include "SVGElement.h"

	#include "DOMImplementation.h"
	#include "Document.h"
	#include "Event.h"
	#include "EventListener.h"
	#include "EventNames.h"
	#include "FrameView.h"
	#include "HTMLNames.h"
	#include "PlatformString.h"
	#include "RenderObject.h"
	#include "SVGDocumentExtensions.h"
	#include "SVGElementInstance.h"
	#include "SVGNames.h"
	#include "SVGSVGElement.h"
	#include "SVGURIReference.h"
	#include "SVGUseElement.h"
	#include "XMLNames.h"

	namespace WebCore {

	using namespace HTMLNames;
	using namespace EventNames;

	SVGElement::SVGElement(const QualifiedName& tagName, Document* doc)
	: StyledElement(tagName, doc)
	, m_shadowParent(0)
	{
	}

	SVGElement::~SVGElement()
	{
	}

	bool SVGElement::isSupported(StringImpl* feature, StringImpl* version) const
	{
	if (DOMImplementation::instance()->hasFeature(feature, version))
	return true;

	return DOMImplementation::instance()->hasFeature(feature, version);
	}

	String SVGElement::id() const
	{
	return getAttribute(idAttr);
	}

	void SVGElement::setId(const String& value, ExceptionCode&)
	{
	setAttribute(idAttr, value);
	}

	String SVGElement::xmlbase() const
	{
	return getAttribute(XMLNames::baseAttr);
	}

	void SVGElement::setXmlbase(const String& value, ExceptionCode&)
	{
	setAttribute(XMLNames::baseAttr, value);
	}

	SVGSVGElement* SVGElement::ownerSVGElement() const
	{
	Node* n = parentNode();
	while (n) {
	if (n->hasTagName(SVGNames::svgTag))
	return static_cast<SVGSVGElement*>(n);

	n = n->parentNode();
	}

	return 0;
	}

	SVGElement* SVGElement::viewportElement() const
	{
	// This function needs shadow tree support - as RenderSVGContainer uses this function
	// to determine the "overflow" property. <use> on <symbol> wouldn't work otherwhise.
	Node* n = isShadowNode() ? const_cast<SVGElement*>(this)->shadowParentNode() : parentNode();
	while (n) {
	if (n->hasTagName(SVGNames::svgTag) \|\| n->hasTagName(SVGNames::imageTag) \|\| n->hasTagName(SVGNames::symbolTag))
	return static_cast<SVGElement*>(n);

	n = n->isShadowNode() ? n->shadowParentNode() : n->parentNode();
	}

	return 0;
	}

	void SVGElement::addSVGEventListener(const AtomicString& eventType, const Attribute* attr)
	{
	Element::setHTMLEventListener(eventType, document()->accessSVGExtensions()->
	createSVGEventListener(attr->localName().string(), attr->value(), this));
	}

	void SVGElement::parseMappedAttribute(MappedAttribute* attr)
	{
	// standard events
	if (attr->name() == onloadAttr)
	addSVGEventListener(loadEvent, attr);
	else if (attr->name() == onclickAttr)
	addSVGEventListener(clickEvent, attr);
	else if (attr->name() == onmousedownAttr)
	addSVGEventListener(mousedownEvent, attr);
	else if (attr->name() == onmousemoveAttr)
	addSVGEventListener(mousemoveEvent, attr);
	else if (attr->name() == onmouseoutAttr)
	addSVGEventListener(mouseoutEvent, attr);
	else if (attr->name() == onmouseoverAttr)
	addSVGEventListener(mouseoverEvent, attr);
	else if (attr->name() == onmouseupAttr)
	addSVGEventListener(mouseupEvent, attr);
	else if (attr->name() == SVGNames::onfocusinAttr)
	addSVGEventListener(DOMFocusInEvent, attr);
	else if (attr->name() == SVGNames::onfocusoutAttr)
	addSVGEventListener(DOMFocusOutEvent, attr);
	else if (attr->name() == SVGNames::onactivateAttr)
	addSVGEventListener(DOMActivateEvent, attr);
	else
	StyledElement::parseMappedAttribute(attr);
	}

	bool SVGElement::haveLoadedRequiredResources()
	{
	Node* child = firstChild();
	while (child) {
	if (child->isSVGElement() && !static_cast<SVGElement*>(child)->haveLoadedRequiredResources())
	return false;
	child = child->nextSibling();
	}
	return true;
	}

	void SVGElement::sendSVGLoadEventIfPossible(bool sendParentLoadEvents)
	{
	RefPtr<SVGElement> currentTarget = this;
	while (currentTarget && currentTarget->haveLoadedRequiredResources()) {
	RefPtr<Node> parent;
	if (sendParentLoadEvents)
	parent = currentTarget->parentNode(); // save the next parent to dispatch too incase dispatching the event changes the tree

	// FIXME: This malloc could be avoided by walking the tree first to check if any listeners are present: http://bugs.webkit.org/show_bug.cgi?id=10264
	RefPtr<Event> event = new Event(loadEvent, false, false);
	event->setTarget(currentTarget);
	ExceptionCode ignored = 0;
	dispatchGenericEvent(this, event.release(), ignored, false);
	currentTarget = (parent && parent->isSVGElement()) ? static_pointer_cast<SVGElement>(parent) : 0;
	}
	}

	void SVGElement::finishParsingChildren()
	{
	// finishParsingChildren() is called when the close tag is reached for an element (e.g. </svg>)
	// we send SVGLoad events here if we can, otherwise they'll be sent when any required loads finish
	sendSVGLoadEventIfPossible();
	}

	bool SVGElement::childShouldCreateRenderer(Node* child) const
	{
	if (child->isSVGElement())
	return static_cast<SVGElement*>(child)->isValid();
	return false;
	}

	void SVGElement::insertedIntoDocument()
	{
	StyledElement::insertedIntoDocument();
	SVGDocumentExtensions* extensions = document()->accessSVGExtensions();

	String resourceId = SVGURIReference::getTarget(id());
	if (extensions->isPendingResource(resourceId)) {
	std::auto_ptr<HashSet<SVGStyledElement*> > clients(extensions->removePendingResource(resourceId));
	if (clients->isEmpty())
	return;

	HashSet<SVGStyledElement*>::const_iterator it = clients->begin();
	const HashSet<SVGStyledElement*>::const_iterator end = clients->end();

	for (; it != end; ++it)
	(*it)->buildPendingResource();

	SVGResource::invalidateClients(*clients);
	}
	}

	static Node* shadowTreeParentElementForShadowTreeElement(Node* node)
	{
	for (Node* n = node; n; n = n->parentNode()) {
	if (n->isShadowNode())
	return n->shadowParentNode();
	}

	return 0;
	}

	bool SVGElement::dispatchEvent(PassRefPtr<Event> e, ExceptionCode& ec, bool tempEvent)
	{
	// TODO: This function will be removed in a follow-up patch!

	EventTarget* target = this;
	Node* useNode = shadowTreeParentElementForShadowTreeElement(this);

	// If we are a hidden shadow tree element, the target must
	// point to our corresponding SVGElementInstance object
	if (useNode) {
	ASSERT(useNode->hasTagName(SVGNames::useTag));
	SVGUseElement* use = static_cast<SVGUseElement*>(useNode);

	SVGElementInstance* instance = use->instanceForShadowTreeElement(this);

	if (instance)
	target = instance;
	}

	e->setTarget(target);

	RefPtr<FrameView> view = document()->view();
	return EventTargetNode::dispatchGenericEvent(this, e, ec, tempEvent);
	}

	void SVGElement::attributeChanged(Attribute* attr, bool preserveDecls)
	{
	ASSERT(attr);
	if (!attr)
	return;

	StyledElement::attributeChanged(attr, preserveDecls);
	svgAttributeChanged(attr->name());
	}

	const AtomicString& SVGElement::getAttribute(const String& name) const
	{
	invokeSVGPropertySynchronizer(name.impl());
	return StyledElement::getAttribute(name);
	}

	const AtomicString& SVGElement::getAttribute(const QualifiedName& name) const
	{
	invokeSVGPropertySynchronizer(name.localName().impl());
	return StyledElement::getAttribute(name);
	}

	}

	#endif // ENABLE(SVG)