#include "../config/pathan_config.h"
/*
 * Copyright (c) 2001, DecisionSoft Limited All rights reserved.
 * Please see LICENSE.TXT for more information.
 */

#include <pathan/internal/navigation/FollowingAxis.hpp>

#include <pathan/Node.hpp>

#include <xercesc/dom/DOMAttr.hpp>
#include <xercesc/dom/DOMElement.hpp>

NavStepImpl::Axis FollowingAxis::getAxis() const {
  return NavStepImpl::FOLLOWING;
}

Sequence FollowingAxis::makeList(const XERCES_CPP_NAMESPACE_QUALIFIER DOMNode *node, const XMLCh* const uri, DynamicContext* context) const
{
  XPath2MemoryManager* memMgr=context->getMemoryManager();
  Sequence returnList(memMgr);
  makeListHelper(node, &returnList, uri, context);
 
  return returnList;
}//makeList


void FollowingAxis::makeListHelper(const XERCES_CPP_NAMESPACE_QUALIFIER DOMNode *node, Sequence *retList, const XMLCh* const uri, DynamicContext* context) const
{  
  XPath2MemoryManager* memMgr=context->getMemoryManager();
  const XERCES_CPP_NAMESPACE_QUALIFIER DOMNode *currentNode = node;

  while(currentNode != 0) {
    //First get the next sibling, if any, otherwise get the parent and keep going from there
    if(currentNode->getNextSibling() == 0) {
      if(currentNode->getNodeType() == XERCES_CPP_NAMESPACE_QUALIFIER DOMNode::ATTRIBUTE_NODE) {
				currentNode = static_cast<const XERCES_CPP_NAMESPACE_QUALIFIER DOMAttr *>(currentNode)->getOwnerElement();
      } else {
				currentNode = currentNode->getParentNode();
      }
      continue;
    }//if

    //otherwise there is a sibling, so keep on chugging
    currentNode = currentNode->getNextSibling();
    
    // add the node only if it is not an entity reference
    if(currentNode->getNodeType() != XERCES_CPP_NAMESPACE_QUALIFIER DOMNode::ENTITY_REFERENCE_NODE && filterNode(currentNode,uri,context))
      retList->addItem(memMgr->createNode(currentNode));
    
    //recursively add descendants to the list
    if(currentNode->hasChildNodes()) {
      addTree(currentNode, retList, uri, context);
    }//if
  }//while
}//makeListHelper

void FollowingAxis::addTree(const XERCES_CPP_NAMESPACE_QUALIFIER DOMNode *node, Sequence *retList, const XMLCh* const uri, DynamicContext* context) const
{
  XPath2MemoryManager* memMgr=context->getMemoryManager();
  XERCES_CPP_NAMESPACE_QUALIFIER DOMNode *child = node->getFirstChild();
  while (child != 0) {    
    // add the node only if it is not an entity reference
    if(child->getNodeType() != XERCES_CPP_NAMESPACE_QUALIFIER DOMNode::ENTITY_REFERENCE_NODE && filterNode(child,uri,context))
      retList->addItem(memMgr->createNode(child));
    
    //recursively add descendants to the list
    if(child->hasChildNodes()) {
      addTree(child, retList, uri, context);
    }//of
    
    child = child->getNextSibling();
  }//while
}//addTree