/*
 * (C) Copyright The MITRE Corporation 1999  All rights reserved.
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * The program provided "as is" without any warranty express or
 * implied, including the warranty of non-infringement and the implied
 * warranties of merchantibility and fitness for a particular purpose.
 * The Copyright owner will not be liable for any damages suffered by
 * you as a result of using the Program. In no event will the Copyright
 * owner be liable for any special, indirect or consequential damages or
 * lost profits even if the Copyright owner has been advised of the
 * possibility of their occurrence.
 *
 * Please see release.txt distributed with this file for more information.
 *
 */
// Tom Kneeland (01/13/2000)
//
//  Wrapper class to convert Mozilla's Attr Interface to TransforMIIX's Attr
//  Interface.
//
//  NOTE:  The objects being wrapped are not deleted.  It is assumed that they
//         will be deleted when the actual ("real") Mozilla Document is
//         destroyed
//
// Modification History:
// Who  When        What
//

#include "mozilladom.h"

//
//Construct an Attribute wrapper object using the specified nsIDOMAttr object
//
Attr::Attr(nsIDOMAttr* attr, Document* owner) : Node(attr, owner)
{
  nsAttr = attr;
}

//
//Destroy the delegate nsIDOMAttr object
//
Attr::~Attr()
{
}

//
//Return the nsAttr data member to the caller.
//
nsIDOMAttr* Attr::getNSAttr()
{
  return nsAttr;
}

void Attr::setNSObj(nsIDOMAttr* attr)
{
  Node::setNSObj(attr);
  nsAttr = attr;
}

//
//Retrieve the name of the attribute storing it in a MozillaString wrapper
//class.  The wrapper is retrieved from the Document so it can be hashed.  At
//this time no one else will use this hased object since it has been 
//specifically created for the caller of this function, but at lease its 
//memory managment is handled automatically.  In the future, a more efficient
//implementation can be created based on the characters stored in the string
//or something.  
//   NOTE:  We don't need to worry about memory management here since the
//          MozillaString object will delete its nsString object automatically
// ( nsIDOMAttr::GetName(nsString&) )
//
const DOMString& Attr::getName()
{
  nsString* name = new nsString();

  if (nsAttr->GetName(*name) == NS_OK)
    return *(ownerDocument->createDOMString(name));
  else
    {
      //name won't be used, so delete it.
      delete name;
      return NULL_STRING;
    }
}

//
//Retrieve the specified flag.  ( nsIDOMAttr::GetSpecified(PRBool*) )
//
MBool Attr::getSpecified() const
{
  MBool specified;

  nsAttr->GetSpecified(&specified);

  return specified;
}

//
//Retrieve the value of the attribute. See getName above for hashing info
//
const DOMString& Attr::getValue()
{
  nsString* value = new nsString();

  if (nsAttr->GetValue(*value) == NS_OK)
    return *(ownerDocument->createDOMString(value));
  else
    {
      //value is not needed so delete it.
      delete value;
      return NULL_STRING;
    }
}

//
//Foward call to nsIDOMAttr::SetValue.
//
void Attr::setValue(const DOMString& newValue)
{
  nsAttr->SetValue(newValue.getConstNSString());
}


//
//Override the set node value member function to create a new TEXT node with
//the DOMString and to add it as the Attribute's child.
//    NOTE:  Not currently impemented, just execute the default setNodeValue
//
//void Attr::setNodeValue(const DOMString& nodeValue)
//{
//  setValue(nodeValue);
//}

//
//Return a DOMString represening the value of this node.  If the value is an
//Entity Reference then return the value of the reference.  Otherwise, it is a
//simple conversion of the text value.
//    NOTE: Not currently implemented, just execute the default getNodeValue
//
//const DOMString& Attr::getNodeValue()
//{
//  return getValue();
//}


//
//First check to see if the new node is an allowable child for an Attr.  If it
//is, call NodeDefinition's implementation of Insert Before.  If not, return
//null as an error.
//
//Node* Attr::insertBefore(Node* newChild, Node* refChild)
//{
//  Node* returnVal = NULL;
//
//  switch (newChild->getNodeType())
//    {
//      case Node::TEXT_NODE :
//      case Node::ENTITY_REFERENCE_NODE:
//        returnVal = NodeDefinition::insertBefore(newChild, refChild);
//
//        if (returnVal)
//          specified = MB_TRUE;
//        break;
//      default:
//        returnVal = NULL;
//    }
//
//  return returnVal;
//}