//
// AbstractNode.h
//
// $Id: //poco/Main/XML/include/DOM/AbstractNode.h#5 $
//
// Definition of the AbstractNode class.
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#ifndef DOM_AbstractNode_INCLUDED
#define DOM_AbstractNode_INCLUDED


#ifndef XML_XML_INCLUDED
#include "XML/XML.h"
#endif
#ifndef DOM_Node_INCLUDED
#include "DOM/Node.h"
#endif
#ifndef DOM_MutationEvent_INCLUDED
#include "DOM/MutationEvent.h"
#endif
#ifndef XML_XMLString_INCLUDED
#include "XML/XMLString.h"
#endif


XML_BEGIN


class AbstractContainerNode;
class Attr;
class EventDispatcher;


class XML_API AbstractNode: public Node
	/// AbstractNode provides a basic implementation
	/// of the Node interface for all types of nodes
	/// that do not contain other nodes.
{
public:
	// Node
	const XMLString& nodeName() const;
	const XMLString& getNodeValue() const;
	void setNodeValue(const XMLString& value);
	Node* parentNode() const;
	NodeList* childNodes() const;
	Node* firstChild() const;
	Node* lastChild() const;
	Node* previousSibling() const;
	Node* nextSibling() const;
	NamedNodeMap* attributes() const;
	Document* ownerDocument() const;
	Node* insertBefore(Node* newChild, Node* refChild);
	Node* replaceChild(Node* newChild, Node* oldChild);
	Node* removeChild(Node* oldChild);
	Node* appendChild(Node* newChild);
	bool hasChildNodes() const;
	Node* cloneNode(bool deep) const;
	void normalize();
	bool isSupported(const XMLString& feature, const XMLString& version) const;
	const XMLString& namespaceURI() const;
	XMLString prefix() const;
	const XMLString& localName() const;
	bool hasAttributes() const;

	// EventTarget
	void addEventListener(const XMLString& type, EventListener* listener, bool useCapture);
	void removeEventListener(const XMLString& type, EventListener* listener, bool useCapture);
	bool dispatchEvent(Event* evt);

	// Extensions
	XMLString innerText() const;

	virtual void autoRelease();

protected:
	AbstractNode(Document* pOwnerDocument);
	AbstractNode(Document* pOwnerDocument, const AbstractNode& node);
	~AbstractNode();

	virtual Node* copyNode(bool deep, Document* pOwnerDocument) const = 0;

	virtual bool events() const;
	virtual bool eventsSuspended() const;
	void captureEvent(Event* evt);
	void bubbleEvent(Event* evt);
	void dispatchSubtreeModified();
	void dispatchNodeInserted();
	void dispatchNodeRemoved();
	virtual void dispatchNodeRemovedFromDocument();
	virtual void dispatchNodeInsertedIntoDocument();
	void dispatchAttrModified(Attr* pAttr, MutationEvent::AttrChangeType changeType, const XMLString& prevValue, const XMLString& newValue);
	void dispatchCharacterDataModified(const XMLString& prevValue, const XMLString& newValue);
	void setOwnerDocument(Document* pOwnerDocument);

	static const XMLString EMPTY_STRING;

private:
	AbstractNode();

	AbstractContainerNode* _pParent;
	AbstractNode*          _pNext;
	Document*              _pOwner;
	EventDispatcher*       _pEventDispatcher;

	static const XMLString NODE_NAME;

	friend class AbstractContainerNode;
	friend class Document;
	friend class DocumentFragment;
	friend class Element;
	friend class Attr;
	friend class CharacterData;
	friend class DOMBuilder;
};


XML_END


#endif // DOM_AbstractNode_INCLUDED