/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* ***** BEGIN LICENSE BLOCK *****

 * Version: MPL 1.1/GPL 2.0/LGPL 2.1

 *

 * The contents of this file are subject to the Mozilla 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/MPL/

 *

 * 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 Communicator client 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 MPL, 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 MPL, the GPL or the LGPL.

 *

 * ***** END LICENSE BLOCK ***** */

#ifndef nsUniversalDetector_h__

#define nsUniversalDetector_h__

class nsCharSetProber;

#define NUM_OF_CHARSET_PROBERS  3

typedef enum {

  ePureAscii = 0,

  eEscAscii  = 1,

  eHighbyte  = 2

} nsInputState;

#define NS_FILTER_CHINESE_SIMPLIFIED  0x01

#define NS_FILTER_CHINESE_TRADITIONAL 0x02

#define NS_FILTER_JAPANESE            0x04

#define NS_FILTER_KOREAN              0x08

#define NS_FILTER_NON_CJK             0x10

#define NS_FILTER_ALL                 0x1F

#define NS_FILTER_CHINESE (NS_FILTER_CHINESE_SIMPLIFIED | \

                           NS_FILTER_CHINESE_TRADITIONAL)

#define NS_FILTER_CJK (NS_FILTER_CHINESE_SIMPLIFIED | \

                       NS_FILTER_CHINESE_TRADITIONAL | \

                       NS_FILTER_JAPANESE | \

                       NS_FILTER_KOREAN)

class nsUniversalDetector {

public:

   nsUniversalDetector(PRUint32 aLanguageFilter);

   virtual ~nsUniversalDetector();

   virtual nsresult HandleData(const char* aBuf, PRUint32 aLen);

   virtual void DataEnd(void);

protected:

   virtual void Report(const char* aCharset) = 0;

   virtual void Reset();

   nsInputState  mInputState;

   PRBool  mDone;

   PRBool  mInTag;

   PRBool  mStart;

   PRBool  mGotData;

   char    mLastChar;

   const char *  mDetectedCharset;

   PRInt32 mBestGuess;

   PRUint32 mLanguageFilter;

   nsCharSetProber  *mCharSetProbers[NUM_OF_CHARSET_PROBERS];

   nsCharSetProber  *mEscCharSetProber;

};

#endif