/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.1 (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/NPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is 
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the NPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsIEntityConverter.h"
#include "nsIFactory.h"
#include "nsIPersistentProperties2.h"


nsresult NS_NewEntityConverter(nsISupports** oResult);

#define kVERSION_STRING_LEN 128

class nsEntityVersionList
{
public:
  nsEntityVersionList() : mEntityProperties(NULL) {}
  ~nsEntityVersionList() {NS_IF_RELEASE(mEntityProperties);}
  PRUint32 mVersion;
  PRUnichar mEntityListName[kVERSION_STRING_LEN+1];
  nsIPersistentProperties *mEntityProperties;
};

class nsEntityConverter: public nsIEntityConverter
{
public:
	
	//
	// implementation methods
	//
	nsEntityConverter();
	virtual ~nsEntityConverter();

	//
	// nsISupports
	//
	NS_DECL_ISUPPORTS

	//
	// nsIEntityConverter
	//
	NS_IMETHOD ConvertToEntity(PRUnichar character, PRUint32 entityVersion, char **_retval);

	NS_IMETHOD ConvertToEntities(const PRUnichar *inString, PRUint32 entityVersion, PRUnichar **_retval);

protected:

  // load a version property file and generate a version list (number/name pair)
  NS_IMETHOD LoadVersionPropertyFile();

  // map version number to version string
  const PRUnichar* GetVersionName(PRUint32 versionNumber);

  // map version number to nsIPersistentProperties
  nsIPersistentProperties* GetVersionPropertyInst(PRUint32 versionNumber);

  // load a properies file
  nsIPersistentProperties* LoadEntityPropertyFile(PRInt32 version);


  nsEntityVersionList *mVersionList;            // array of version number/name pairs
  PRUint32 mVersionListLength;                  // number of supported versions
};