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ElementsByTagNameList.cpp
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//
// ElementsByTagNameList.cpp
//
// Library: XML
// Package: DOM
// Module: DOM
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/DOM/ElementsByTagNameList.h"
#include "Poco/DOM/Node.h"
#include "Poco/DOM/Document.h"
#include <climits>
namespace Poco {
namespace XML {
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;
}
namespace
{
static const XMLString asterisk = toXMLString("*");
}
Node* ElementsByTagNameList::find(const Node* pParent, unsigned long index) const
{
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
{
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);
}
} } // namespace Poco::XML