//
// ElementsByTagNameList.cpp
//
// $Id: //poco/Main/XML/src/ElementsByTagNameList.cpp#5 $
//
// 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.
//


#include "DOM/ElementsByTagNameList.h"
#include "DOM/Node.h"
#include "DOM/Document.h"


XML_BEGIN


ElementsByTagNameList::ElementsByTagNameList(const Node* pParent, const XMLString& name):
	_pParent(pParent),
	_name(name),
	_count(0)
{
	poco_check_ptr (pParent);
	
	_pParent->duplicate();
}


ElementsByTagNameList::~ElementsByTagNameList()
{
	_pParent->release();
}


Node* ElementsByTagNameList::item(unsigned long index) const
{
	_count = 0;
	return find(_pParent, index);
}


unsigned long ElementsByTagNameList::length() const
{
	_count = 0;
	find(_pParent, ULONG_MAX);
	return _count;
}


Node* ElementsByTagNameList::find(const Node* pParent, unsigned long index) const
{
	static const XMLString asterisk = toXMLString("*");

	if (!pParent) return 0;

	// preorder search
	Node* pCur = pParent->firstChild();
	while (pCur)
	{
		if (pCur->nodeType() == Node::ELEMENT_NODE && (_name == asterisk || pCur->nodeName() == _name))
		{
			if (_count == index) return pCur;
			_count++;
		}
		Node* pNode = find(pCur, index);
		if (pNode) return pNode;
		pCur = pCur->nextSibling();
	}
	return pCur;
}


void ElementsByTagNameList::autoRelease()
{
	_pParent->ownerDocument()->autoReleasePool().add(this);
}


ElementsByTagNameListNS::ElementsByTagNameListNS(const Node* pParent, const XMLString& namespaceURI, const XMLString& localName):
	_pParent(pParent),
	_localName(localName),
	_namespaceURI(namespaceURI),
	_count(0)
{
	poco_check_ptr (pParent);
	
	_pParent->duplicate();
}



ElementsByTagNameListNS::~ElementsByTagNameListNS()
{
	_pParent->release();
}


Node* ElementsByTagNameListNS::item(unsigned long index) const
{
	_count = 0;
	return find(_pParent, index);
}


unsigned long ElementsByTagNameListNS::length() const
{
	_count = 0;
	find(_pParent, ULONG_MAX);
	return _count;
}


Node* ElementsByTagNameListNS::find(const Node* pParent, unsigned long index) const
{
	static const XMLString asterisk = toXMLString("*");

	if (!pParent) return 0;

	// preorder search
	Node* pCur = pParent->firstChild();
	while (pCur)
	{
		if (pCur->nodeType() == Node::ELEMENT_NODE && (_localName == asterisk || pCur->localName() == _localName) && (_namespaceURI == asterisk || pCur->namespaceURI() == _namespaceURI))
		{
			if (_count == index) return pCur;
			_count++;
		}
		Node* pNode = find(pCur, index);
		if (pNode) return pNode;
		pCur = pCur->nextSibling();
	}
	return pCur;
}


void ElementsByTagNameListNS::autoRelease()
{
	_pParent->ownerDocument()->autoReleasePool().add(this);
}


XML_END