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nsUniversalDetector.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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00014  *
00015  * The Original Code is Mozilla Communicator client code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
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00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
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00037 
00038 #ifndef nsUniversalDetector_h__
00039 #define nsUniversalDetector_h__
00040 
00041 class nsCharSetProber;
00042 
00043 #define NUM_OF_CHARSET_PROBERS  3
00044 
00045 typedef enum {
00046   ePureAscii = 0,
00047   eEscAscii  = 1,
00048   eHighbyte  = 2
00049 } nsInputState;
00050 
00051 class nsUniversalDetector {
00052 public:
00053    nsUniversalDetector();
00054    virtual ~nsUniversalDetector();
00055    virtual nsresult HandleData(const char* aBuf, PRUint32 aLen);
00056    virtual void DataEnd(void);
00057 
00058 protected:
00059    virtual void Report(const char* aCharset) = 0;
00060    virtual void Reset();
00061    nsInputState  mInputState;
00062    PRBool  mDone;
00063    PRBool  mInTag;
00064    PRBool  mStart;
00065    PRBool  mGotData;
00066    char    mLastChar;
00067    const char *  mDetectedCharset;
00068    PRInt32 mBestGuess;
00069 
00070    nsCharSetProber  *mCharSetProbers[NUM_OF_CHARSET_PROBERS];
00071    nsCharSetProber  *mEscCharSetProber;
00072 };
00073 
00074 #endif
00075