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/*
qutf7codec.h
A TQTextCodec for UTF-7 (rfc2152).
Copyright (c) 2001 Marc Mutz <mutz@kde.org>
See file COPYING for details
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, US
As a special exception, permission is granted to use this plugin
with any version of TQt by TrollTech AS, Norway. In this case, the
use of this plugin doesn't cause the resulting executable to be
covered by the GNU General Public License.
This exception does not however invalidate any other reasons why the
executable file might be covered by the GNU General Public License.
*/
#ifndef TQUTF7CODEC_H
#define TQUTF7CODEC_H
#include "tqtextcodec.h"
#include <tdepimmacros.h>
#ifndef TQT_NO_TEXTCODEC
/** @short A TQTextCodec for the UTF-7 transformation of Unicode.
This is a TQTextCodec for the UTF-7 transformation of Unicode,
described in RFC2152.
Use it as you would use any other TQTextCodec. Only if you use the
encoder directly (via makeEncoder), you should bear in mind
that if your application needs the encoder to return to ASCII mode
(like it's the case for RFC2047 mail header encoded words), you
have to tell the encoder by requesting the encoding of a @em null
TQString.
@author Marc Mutz <mutz@kde.org> */
class KDE_EXPORT TQUtf7Codec : public TQTextCodec {
bool encOpt, encLwsp;
public:
TQUtf7Codec() : TQTextCodec() {}
int mibEnum() const;
const char* name() const;
const char* mimeName() const;
TQTextDecoder* makeDecoder() const;
TQTextEncoder* makeEncoder() const;
bool canEncode( TQChar ) const;
bool canEncode( const TQString& ) const;
int heuristicContentMatch( const char* chars, int len ) const;
};
/** This is a version of @ref TQUtf7Codec, which should only be used in
MIME transfer. It differs from @ref TQUtf7Codec only in that the
encoder escapes additional characters (the RFC2152 "optional
direct set"), which might not be allowed in RFC822/RFC2047 header
fields.
You should only use this codec for @em encoding, since it's output
is pure UTF-7 and can equally well be decoded by @ref TQUtf7Codec's
decoder.
To distinguish between the two variants, this class has MIB enum
-1012 (the nagative of UTF-7) and the somewhat awkward name
"X-QT-UTF-7-STRICT". The MIME preferred charset name is still
"UTF-7", though.
@short A variant of @ref TQUtf7Codec, which protectes certain
characters in MIME transport
@author Marc Mutz <mutz@kde.org> */
class KDE_EXPORT TQStrictUtf7Codec : public TQUtf7Codec {
public:
TQStrictUtf7Codec() : TQUtf7Codec() {}
const char* name() const;
int mibEnum() const;
TQTextEncoder* makeEncoder() const;
};
#endif // TQT_NO_TEXTCODEC
#endif // TQUTF7CODEC_H
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