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//
// VMime library (http://www.vmime.org)
// Copyright (C) 2002 Vincent Richard <vincent@vmime.org>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 3 of
// the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// 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 USA.
//
// Linking this library statically or dynamically with other modules is making
// a combined work based on this library. Thus, the terms and conditions of
// the GNU General Public License cover the whole combination.
//
#ifndef VMIME_WORDENCODER_HPP_INCLUDED
#define VMIME_WORDENCODER_HPP_INCLUDED
#include "vmime/charset.hpp"
namespace vmime {
namespace utility {
namespace encoder {
class encoder;
} // encoder
} // utility
/** Encodes words according to RFC-2047.
*/
class VMIME_EXPORT wordEncoder {
public:
/** Available encodings for RFC-2047. */
enum Encoding {
ENCODING_AUTO,
ENCODING_QP,
ENCODING_B64
};
wordEncoder(
const string& buffer,
const charset& charset,
const Encoding encoding = ENCODING_AUTO
);
/** Return the next chunk in the word.
*
* @param maxLength maximal length of the chunk
* @return next chunk, of maximal length 'maxLength' if possible
*/
const string getNextChunk(const size_t maxLength);
/** Return the encoding used.
*
* @return encoding
*/
Encoding getEncoding() const;
/** Test whether RFC-2047 encoding is needed.
*
* @param ctx generation context
* @param buffer buffer to analyze
* @param charset charset of the buffer
* @param lang language code, in the format specified by RFC-1766
* @return true if encoding is needed, false otherwise.
*/
static bool isEncodingNeeded(
const generationContext& ctx,
const string& buffer,
const charset& charset,
const string& lang
);
/** Guess the best RFC-2047 encoding to use for the specified buffer.
*
* @param buffer buffer to analyze
* @param charset charset of the buffer
* @return RFC-2047 encoding
*/
static Encoding guessBestEncoding(const string& buffer, const charset& charset);
private:
string m_buffer;
size_t m_pos;
size_t m_length;
bool m_simple;
charset m_charset;
Encoding m_encoding;
shared_ptr <utility::encoder::encoder> m_encoder;
};
} // vmime
#endif // VMIME_WORDENCODER_HPP_INCLUDED
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