simple8impl.cpp

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.7平台上编译为嵌入式图形界面操作系统。

    // to iso8859-11, so we name it 8859-11 here, but recognise the name tis620 too.

    // $ for A in 8 9 A B C D E F ; do for B in 0 1 2 3 4 5 6 7 8 9 A B C D E F ; do echo x${A}${B} 0xFFFD ; done ; done > /tmp/digits ; ( cut -c25- < TIS-620 ; cat /tmp/digits ) | awk '/^x[89ABCDEF]/{ print $1, $2 }' | sed -e 's/<U/0x/' -e 's/>//' | sort | uniq -w4 | cut -c5- | paste '-d ' - - - - - - - - | sed -e 's/ /, /g' -e 's/$/,/' -e '$ s/,$/} },/' -e '1 s/^/{ /' > ~/tmp/tis-620
    { "ISO 8859-11", 2259, // Thai character set mib enum taken from tis620 (which is byte by byte equivalent)
        { 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
              0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
              0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
              0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
              0x00A0, 0x0E01, 0x0E02, 0x0E03, 0x0E04, 0x0E05, 0x0E06, 0x0E07,
              0x0E08, 0x0E09, 0x0E0A, 0x0E0B, 0x0E0C, 0x0E0D, 0x0E0E, 0x0E0F,
              0x0E10, 0x0E11, 0x0E12, 0x0E13, 0x0E14, 0x0E15, 0x0E16, 0x0E17,
              0x0E18, 0x0E19, 0x0E1A, 0x0E1B, 0x0E1C, 0x0E1D, 0x0E1E, 0x0E1F,
              0x0E20, 0x0E21, 0x0E22, 0x0E23, 0x0E24, 0x0E25, 0x0E26, 0x0E27,
              0x0E28, 0x0E29, 0x0E2A, 0x0E2B, 0x0E2C, 0x0E2D, 0x0E2E, 0x0E2F,
              0x0E30, 0x0E31, 0x0E32, 0x0E33, 0x0E34, 0x0E35, 0x0E36, 0x0E37,
              0x0E38, 0x0E39, 0x0E3A, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0x0E3F,
              0x0E40, 0x0E41, 0x0E42, 0x0E43, 0x0E44, 0x0E45, 0x0E46, 0x0E47,
              0x0E48, 0x0E49, 0x0E4A, 0x0E4B, 0x0E4C, 0x0E4D, 0x0E4E, 0x0E4F,
              0x0E50, 0x0E51, 0x0E52, 0x0E53, 0x0E54, 0x0E55, 0x0E56, 0x0E57,
              0x0E58, 0x0E59, 0x0E5A, 0x0E5B, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD} },

    // change LAST_MIB if you add more, and edit unicodevalues in
    // kernel/qpsprinter.cpp too.
};


static const QSimpleTextCodec * reverseOwner = 0;
static QArray<char> * reverseMap = 0;


QSimpleTextCodec::QSimpleTextCodec( int i )
    : QTextCodec(), forwardIndex( i )
{
}


QSimpleTextCodec::~QSimpleTextCodec()
{
    if ( reverseOwner == this ) {
        delete reverseMap;
        reverseMap = 0;
        reverseOwner = 0;
    }
}

QString QSimpleTextCodec::toUnicode(const char* chars, int len) const
{
    if ( len <= 0 || chars == 0 )
        return QString::null;

    const unsigned char * c = (const unsigned char *)chars;
    int i;

    for ( i = 0; i < len; i++ ) {
	if ( c[i] == '\0' )
	    len = i;
    }

    QString r;
    r.setUnicode(0, len);
    QChar* uc = (QChar*)r.unicode(); // const_cast

    for ( i = 0; i < len; i++ ) {
	if ( c[i] > 127 )
            uc[i] = unicodevalues[forwardIndex].values[c[i]-128];
	else
            uc[i] = c[i];
    }
    return r;
}


QCString QSimpleTextCodec::fromUnicode(const QString& uc, int& len ) const
{
    if ( reverseOwner != this ) {
        int m = 0;
        int i = 0;
        while( i < 128 ) {
            if ( unicodevalues[forwardIndex].values[i] > m &&
                 unicodevalues[forwardIndex].values[i] < 0xfffd )
                m = unicodevalues[forwardIndex].values[i];
            i++;
        }
        m++;
        if ( !reverseMap )
            reverseMap = new QArray<char>( m );
        if ( m > (int)(reverseMap->size()) )
            reverseMap->resize( m );
        for( i = 0; i < 128 && i < m; i++ )
            (*reverseMap)[i] = (char)i;
        for( ;i < m; i++ )
            (*reverseMap)[i] = '?';
	// small hack to map nbsp to space for all simple codecs. Looks way better than a question mark.
	(*reverseMap)[0xa0] = ' ';
        for( i=128; i<256; i++ ) {
            int u = unicodevalues[forwardIndex].values[i-128];
            if ( u < m )
                (*reverseMap)[u] = (char)(unsigned char)(i);
        }
        reverseOwner = this;
    }
    if ( len <0 || len > (int)uc.length() )
        len = uc.length();
    QCString r( len+1 );
    int i = len;
    int u;
    const QChar* ucp = uc.unicode();
    char* rp = r.data();
    char* rmp = reverseMap->data();
    int rmsize = (int) reverseMap->size();
    while( i-- )
    {
        u = ucp->unicode();
        *rp++ = u < 128 ? u : (( u < rmsize ) ? (*(rmp+u)) : '?' );
        ucp++;
    }
    r[len] = 0;
    return r;
}


const char* QSimpleTextCodec::name() const
{
    return unicodevalues[forwardIndex].cs;
}


int QSimpleTextCodec::mibEnum() const
{
    return unicodevalues[forwardIndex].mib;
}

int QSimpleTextCodec::heuristicNameMatch(const char* hint) const
{
    if ( hint[0]=='k' ) {
        // Help people with messy fonts
        if ( QCString(hint) == "koi8-1" )
            return QTextCodec::heuristicNameMatch("koi8-r")-1;
        if ( QCString(hint) == "koi8-ru" )
            return QTextCodec::heuristicNameMatch("koi8-r")-1;
    } else if ( hint[0] == 't' && QCString(name()) == "ISO 8859-11" ) {
	// 8859-11 and tis620 are byte by bute equivalent
	int i = simpleHeuristicNameMatch("tis620-0", hint);
	if( !i )
	    i = simpleHeuristicNameMatch("tis-620", hint);
	if( i ) return i;
    } else if (( hint[0]=='m' ) && ( QCString(hint) == "microsoft-cp1251" ))
         return QTextCodec::heuristicNameMatch("cp1251");
    else if (( hint[0]=='w' ) && ( QCString(hint) == "windows-1251" )) // No tr
         return QTextCodec::heuristicNameMatch("cp1251")-1;
    return QTextCodec::heuristicNameMatch(hint);
}

int QSimpleTextCodec::heuristicContentMatch(const char* chars, int len) const
{
    if ( len<1 || !chars )
        return -1;
    int i = 0;
    const uchar * c = (const unsigned char *)chars;
    int r = 0;
    while( i<len && c && *c ) {
        if ( *c >= 128 ) {
            if ( unicodevalues[forwardIndex].values[(*c)-128] == 0xfffd )
                return -1;
        }
        if ( (*c >= ' ' && *c < 127) ||
             *c == '\n' || *c == '\t' || *c == '\r' )
            r++;
        i++;
        c++;
    }
    if ( mibEnum()==4 )
        r+=1;
    return r;
}


Simple8Impl::Simple8Impl()
    : ref(0)
{
}

Simple8Impl::~Simple8Impl()
{
}

QStringList Simple8Impl::names() const
{
    QStringList r;
    int i=0;
    do {
	r.append(unicodevalues[i].cs);
    } while ( unicodevalues[i++].mib != LAST_MIB );
    return r;
}

QTextCodec *Simple8Impl::createForName( const QString &name )
{
    int i=0;
    do {
	if ( name == unicodevalues[i].cs )
	    return new QSimpleTextCodec(i);
    } while ( unicodevalues[i++].mib != LAST_MIB );
    return 0;
}

    
QValueList<int> Simple8Impl::mibEnums() const
{
    QValueList<int> r;
    int i=0;
    do {
        r.append(unicodevalues[i].mib);
    } while ( unicodevalues[i++].mib != LAST_MIB );
    return r;
}

QTextCodec *Simple8Impl::createForMib( int mib )
{
    int i=0;
    do {
	if ( mib == unicodevalues[i].mib )
	    return new QSimpleTextCodec(i);
    } while ( unicodevalues[i++].mib != LAST_MIB );
    return 0;
}


#ifndef QT_NO_COMPONENT
QRESULT Simple8Impl::queryInterface( const QUuid &uuid, QUnknownInterface **iface )
{
    *iface = 0;
    if ( uuid == IID_QUnknown )
	*iface = this;
    else if ( uuid == IID_QtopiaTextCodec )
	*iface = this;

    if ( *iface )
	(*iface)->addRef();
    return (*iface) ? QS_OK : QS_FALSE;
}

Q_EXPORT_INTERFACE()
{
    Q_CREATE_INSTANCE( Simple8Impl )
}
#endif