C++ (Cpp) qIsZeroWidthChar Examples

Example #1

File: qfont_x11.cpp Project: aroraujjwal/qt3

int QFontMetrics::width( QChar ch ) const
{
    unsigned short uc = ch.unicode();
    if ( uc < QFontEngineData::widthCacheSize &&
	 d->engineData && d->engineData->widthCache[ uc ] )
	return d->engineData->widthCache[ uc ];

    if ( ::category( ch ) == QChar::Mark_NonSpacing || qIsZeroWidthChar(ch.unicode()))
	return 0;

    QFont::Script script;
    SCRIPT_FOR_CHAR( script, ch );

    QFontEngine *engine = d->engineForScript( script );
#ifdef QT_CHECK_STATE
    Q_ASSERT( engine != 0 );
#endif // QT_CHECK_STATE

    glyph_t glyphs[8];
    advance_t advances[8];
    int nglyphs = 7;
    engine->stringToCMap( &ch, 1, glyphs, advances, &nglyphs, FALSE );

    // ### can nglyphs != 1 happen at all? Not currently I think
    if ( uc < QFontEngineData::widthCacheSize && advances[0] > 0 && advances[0] < 0x100 )
	d->engineData->widthCache[ uc ] = advances[0];

    return advances[0];
}

Example #2

File: qfont_qws.cpp Project: Miguel-J/eneboo-core

int QFontMetrics::width( QChar ch ) const
{
    unsigned short uc = ch.unicode();
    QFontEngine *engine = d->engineForScript( QFont::NoScript );
    if ( uc < QFontEngineData::widthCacheSize &&
	 d->engineData && d->engineData->widthCache[ uc ] )
	return (d->engineData->widthCache[ uc ]*engine->scale)>>8;

    if ( ::category( ch ) == QChar::Mark_NonSpacing || qIsZeroWidthChar(ch.unicode()))
	return 0;

    int width = memorymanager->lockGlyphMetrics( engine->handle(), ch.unicode() )->advance;

    if ( ch.unicode() < QFontEngineData::widthCacheSize && width > 0 && width < 0x100 )
	d->engineData->widthCache[ ch.unicode() ] = width;

    return (width*engine->scale)>>8;
}

Example #3

File: qfont_qws.cpp Project: Miguel-J/eneboo-core

int QFontMetrics::charWidth( const QString &str, int pos ) const
{
    if ( pos < 0 || pos > (int)str.length() )
	return 0;

    const QChar &ch = str.unicode()[ pos ];
    if ( ch.unicode() < QFontEngineData::widthCacheSize &&
	 d->engineData && d->engineData->widthCache[ ch.unicode() ] )
	return (d->engineData->widthCache[ ch.unicode() ]*d->engineData->engine->scale)>>8;

    QFont::Script script;
    SCRIPT_FOR_CHAR( script, ch );

    int width;

    if ( script >= QFont::Arabic && script <= QFont::Khmer ) {
	// complex script shaping. Have to do some hard work
	int from = QMAX( 0,  pos - 8 );
	int to = QMIN( (int)str.length(), pos + 8 );
	QConstString cstr( str.unicode()+from, to-from);
	QTextEngine layout( cstr.string(), d );
	layout.itemize( QTextEngine::WidthOnly );
	width = layout.width( pos-from, 1 );
    } else if ( ::category( ch ) == QChar::Mark_NonSpacing || qIsZeroWidthChar(ch.unicode())) {
        width = 0;
    } else {
	QFontEngine *engine = d->engineForScript( script );
#ifdef QT_CHECK_STATE
	Q_ASSERT( engine != 0 );
#endif // QT_CHECK_STATE

	glyph_t glyphs[8];
	advance_t advances[8];
	int nglyphs = 7;
	engine->stringToCMap( &ch, 1, glyphs, advances, &nglyphs, FALSE );
	width = advances[0];
    }
    if ( ch.unicode() < QFontEngineData::widthCacheSize && width > 0 && width < 0x100 )
	d->engineData->widthCache[ ch.unicode() ] = width;
    return width;
}