//
// CharacterData.h
//
// $Id: //poco/Main/XML/include/DOM/CharacterData.h#5 $
//
// Definition of the DOM CharacterData 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
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#ifndef DOM_CharacterData_INCLUDED
#define DOM_CharacterData_INCLUDED


#ifndef XML_XML_INCLUDED
#include "XML/XML.h"
#endif
#ifndef DOM_AbstractNode_INCLUDED
#include "DOM/AbstractNode.h"
#endif
#ifndef XML_XMLString_INCLUDED
#include "XML/XMLString.h"
#endif


XML_BEGIN


class XML_API CharacterData: public AbstractNode
	/// The CharacterData interface extends Node with a set of attributes and methods
	/// for accessing character data in the DOM. For clarity this set is defined
	/// here rather than on each object that uses these attributes and methods.
	/// No DOM objects correspond directly to CharacterData, though Text and others
	/// do inherit the interface from it. All offsets in this interface start from 0.
	/// 
	/// Text strings in the DOM are represented in either UTF-8 (if XML_UNICODE_WCHAR_T is
	/// not defined) or in UTF-16 (if XML_UNICODE_WCHAR_T is defined).
	/// Indexing on character data is done in XMLChar units.
{
public:
	const XMLString& data() const;
		/// Returns the character data of the node that 
		/// implements the interface.
	
	const XMLString& getData() const;
		/// Returns the character data of the node that 
		/// implements the interface.

	void setData(const XMLString& data);
		/// Sets the character data of the node that
		/// implements the interface.

	unsigned long length() const;
		/// Returns the number of XMLChars that are available
		/// through getData and substringData. This may have the
		/// value zero.

	XMLString substringData(unsigned long offset, unsigned long count) const;
		/// Extracts a range of data from the node.
		/// If offset and count exceeds the length, then all
		/// the characters to the end of the data are returned.

	void appendData(const XMLString& arg);
		/// Append the string to the end of the character data
		/// of the node.

	void insertData(unsigned long offset, const XMLString& arg);
		/// Insert a string at the specified character offset.

	void deleteData(unsigned long offset, unsigned long count);
		/// Remove a range of characters from the node.

	void replaceData(unsigned long offset, unsigned long count, const XMLString& arg);
		/// Replace the characters starting at the specified character
		/// offset with the specified string.

	// Non-standard extensions
	XMLString trimmedData() const;
		/// Returns the character data of that node with
		/// all surrounding whitespace removed.
		///
		/// This method is an extension to the W3C Document Object Model.

	// Node
	const XMLString& getNodeValue() const;
	void setNodeValue(const XMLString& value);

protected:
	CharacterData(Document* pOwnerDocument, const XMLString& data);
	CharacterData(Document* pOwnerDocument, const CharacterData& data);
	~CharacterData();

private:
	XMLString _data;
};


//
// inlines
//
inline const XMLString& CharacterData::data() const
{
	return _data;
}


inline const XMLString& CharacterData::getData() const
{
	return _data;
}


inline unsigned long CharacterData::length() const
{
	return (unsigned long) _data.length();
}


XML_END


#endif // DOM_CharacterData_INCLUDED