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/***************************************************************************
ktextcharcodec.cpp - description
-------------------
begin : Sa Nov 27 2004
copyright : (C) 2004 by Friedrich W. H. Kossebau
email : Friedrich.W.H@Kossebau.de
***************************************************************************/
/***************************************************************************
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License version 2 as published by the Free Software Foundation. *
* *
***************************************************************************/
// qt specific
#include "textcodec.h"
// kde specific
#include <kglobal.h>
#include <klocale.h>
#include <kcharsets.h>
// lib specific
#include "ktextcharcodec.h"
using namespace KHE;
static const char TQTextCodecWhiteSpace = 63;
static struct KEncodingNames {
KEncoding Encoding;
const char *Name;
}
const EncodingNames[] = {
{ ISO8859_1Encoding, "ISO 8859-1" },
{ ISO8859_2Encoding, "ISO 8859-2" },
{ ISO8859_3Encoding, "ISO 8859-3" },
{ ISO8859_4Encoding, "ISO 8859-4" },
{ ISO8859_5Encoding, "ISO 8859-5" },
{ ISO8859_6Encoding, "ISO 8859-6" },
{ ISO8859_7Encoding, "ISO 8859-7" },
{ ISO8859_8Encoding, "ISO 8859-8" },
{ ISO8859_8_IEncoding, "ISO 8859-8-I" },
{ ISO8859_9Encoding, "ISO 8859-9" },
{ ISO8859_11Encoding, "ISO 8859-11" },
{ ISO8859_13Encoding, "ISO 8859-13" },
{ ISO8859_15Encoding, "ISO 8859-15" },
{ CP1250Encoding, "CP 1250" },
{ CP1251Encoding, "CP 1251" },
{ CP1252Encoding, "CP 1252" },
{ CP1253Encoding, "CP 1253" },
{ CP1254Encoding, "CP 1254" },
{ CP1255Encoding, "CP 1255" },
{ CP1256Encoding, "CP 1256" },
{ CP1257Encoding, "CP 1257" },
{ CP1258Encoding, "CP 1258" },
{ IBM850Encoding, "IBM 850" },
{ IBM866Encoding, "IBM 866" },
{ KOI8_REncoding, "KOI8-R" },
{ KOI8_UEncoding, "KOI8-U" } };
//TODO: WS2
static const unsigned int NoOfEncodings = 26;
static bool is8Bit( TQTextCodec *Codec )
{
bool Found = false;
for( unsigned int i=0; i<NoOfEncodings; ++i )
{
if( qstrcmp(Codec->name(),EncodingNames[i].Name) == 0 )
{
Found = true;
break;
}
}
return Found;
}
static TQTextCodec *createLatin1()
{
return KGlobal::charsets()->codecForName( EncodingNames[0].Name );
}
/** heuristic seems to be doomed :(
static bool is8Bit( TQTextCodec *Codec )
{
bool Result = true;
// first test different for 0
unsigned char c[4];
c[0] = 0;
c[1] = c[2] = c[3] = 230;
TQString S = Codec->toUnicode( (const char*)&c,4 );
int Length = 1;
TQCString CS = Codec->fromUnicode( S, Length );
//kdDebug() << Codec->name() << " "<<Length << endl;
if( Length > 0 )
Result = false;
// test if all chars survive the recoding
else
do
{
++c[0];
S = Codec->toUnicode( (const char*)&c,4 );
Length = 1;
CS = Codec->fromUnicode( S, Length );
//kdDebug() << Codec->name() << " "<<c[0]<<"->"<<CS[0]<<":"<<Length << endl;
if( Length != 1 || (CS[0] != (char)c[0] && CS[0] != TQTextCodecWhiteSpace) )
{
Result = false;
break;
}
}
while( c[0] < 255 );
return Result;
}
const TQStringList &KTextCharCodec::codecNames()
{
// first call?
if( CodecNames.isEmpty() )
{
const TQStringList &CharSets = KGlobal::charsets()->availableEncodingNames();
for( TQStringList::ConstIterator it = CharSets.begin(); it != CharSets.end(); ++it )
{
bool Found = true;
TQTextCodec* Codec = KGlobal::charsets()->codecForName( *it, Found );
if( Found && is8Bit(Codec) )
CodecNames.append( TQString::fromLatin1(Codec->name()) );
}
}
return CodecNames;
}
TQString KTextCharCodec::nameOfEncoding( KEncoding C )
{
KTextCharCodec *Codec = 0;
const char* N = 0;
for( unsigned int i=0; i<NoOfEncodings; ++i )
{
if( EncodingNames[i].Encoding == C )
{
N = EncodingNames[i].Name;
break;
}
}
if( N != 0 )
{
TQString CodeName = TQString::fromLatin1( N );
}
return Codec;
}
*/
TQStringList KTextCharCodec::CodecNames;
KTextCharCodec *KTextCharCodec::createLocalCodec()
{
TQTextCodec *Codec = KGlobal::locale()->codecForEncoding();
if( !is8Bit(Codec) )
Codec = createLatin1();
return new KTextCharCodec( Codec );
}
KTextCharCodec *KTextCharCodec::createCodec( const TQString &CodeName )
{
bool Ok;
TQTextCodec *Codec = KGlobal::charsets()->codecForName( CodeName, Ok );
if( Ok )
Ok = is8Bit( Codec );
return Ok ? new KTextCharCodec( Codec ) : 0;
}
const TQStringList &KTextCharCodec::codecNames()
{
// first call?
if( CodecNames.isEmpty() )
{
for( unsigned int i=0; i<NoOfEncodings; ++i )
{
bool Found = true;
TQString Name = TQString::fromLatin1( EncodingNames[i].Name );
TQTextCodec* Codec = KGlobal::charsets()->codecForName( Name, Found );
if( Found )
CodecNames.append( TQString::fromLatin1(Codec->name()) );
}
}
return CodecNames;
}
KTextCharCodec::KTextCharCodec( TQTextCodec *C )
: Codec( C ),
Decoder( C->makeDecoder() ),
Encoder( C->makeEncoder() )
{}
KTextCharCodec::~KTextCharCodec()
{
delete Decoder;
delete Encoder;
}
bool KTextCharCodec::encode( char *D, const TQChar &C ) const
{
if( !Codec->canEncode(C) ) // TODO: do we really need the codec?
return false;
int dummy;
char T = Encoder->fromUnicode( C, dummy )[0];
*D = T;
return true;
}
KHEChar KTextCharCodec::decode( char Byte ) const
{
TQString S( Decoder->toUnicode(&Byte,1) );
return KHEChar(S.at(0));
}
const TQString& KTextCharCodec::name() const
{
if( Name.isNull() )
Name = TQString::fromLatin1( Codec->name() );
return Name;
}
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