syntaxhighliter_cpp.cpp

Linux下的基于X11的图形开发环境。

    QChar lastChar;
    for (;;) {
	QChar c = string->at( i )->c;

	if ( lastWasBackSlash ) {
	    input = InputSep;
	} else {
	    switch ( c ) {
	    case '*':
		input = InputAsterix;
		break;
	    case '/':
		input = InputSlash;
		break;
	    case '(': case '[': case '{':
		input = InputParen;
		if ( state == StateStandard ||
		     state == StateNumber ||
		     state == StatePreProcessor ||
		     state == StateCCommentEnd2 ||
		     state == StateCCommentEnd1 ||
		     state == StateString2End ||
		     state == StateStringEnd )
		    paragData->parenList << Paren( Paren::Open, c, i );
		break;
	    case ')': case ']': case '}':
		input = InputParen;
		if ( state == StateStandard ||
		     state == StateNumber ||
		     state == StatePreProcessor ||
		     state == StateCCommentEnd2 ||
		     state == StateCCommentEnd1 ||
		     state == StateString2End ||
		     state == StateStringEnd )
		    paragData->parenList << Paren( Paren::Closed, c, i );
		break;
	    case '#':
		input = InputHash;
		break;
	    case '"':
		input = InputQuotation;
		break;
	    case '\'':
		input = InputApostrophe;
		break;
	    case ' ':
		input = InputSpace;
		break;
	    case '1': case '2': case '3': case '4': case '5':
	    case '6': case '7': case '8': case '9': case '0':
		if ( alphabeth.find( lastChar ) != -1 &&
		     ( mathChars.find( lastChar ) == -1 || numbers.find( string->at( i - 1 )->c ) == -1 ) ) {
		    input = InputAlpha;
		} else {
		    if ( input == InputAlpha && numbers.find( lastChar ) != -1 )
			input = InputAlpha;
		    else
			input = InputNumber;
		}
		break;
	    case ':': {
		input = InputAlpha;
		QChar nextChar = ' ';
		if ( i < string->length() - 1 )
		    nextChar = string->at( i + 1 )->c;
		if ( state == StateStandard && !questionMark && lastChar != ':' && nextChar != ':' ) {
		    for ( int j = 0; j < i; ++j ) {
			if ( string->at( j )->format() == formatStandard )
			    string->setFormat( j, 1, formatLabel, FALSE );
		    }
		}
	    } break;
	    default: {
		if ( !questionMark && c == '?' )
		    questionMark = TRUE;
		if ( c.isLetter() || c == '_' )
		    input = InputAlpha;
		else
		    input = InputSep;
	    } break;
	    }
	}

	lastWasBackSlash = !lastWasBackSlash && c == '\\';

	if ( input == InputAlpha )
	    buffer += c;

    	state = table[ state ][ input ];

	switch ( state ) {
	case StateStandard: {
	    int len = buffer.length();
	    string->setFormat( i, 1, formatStandard, FALSE );
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = FALSE;
	    if ( buffer.length() > 0 && input != InputAlpha ) {
		if ( buffer[ 0 ] == 'Q' ) {
		    string->setFormat( i - buffer.length(), buffer.length(), formatType, FALSE );
		} else {
		    QMap<int, QMap<QString, int > >::Iterator it = wordMap->find( len );
		    if ( it != wordMap->end() ) {
			QMap<QString, int >::Iterator it2 = ( *it ).find( buffer );
			if ( it2 != ( *it ).end() )
			    string->setFormat( i - buffer.length(), buffer.length(), format( ( *it2 ) ), FALSE );
		    }
		}
		buffer = QString::null;
	    }
	} break;
	case StateCommentStart1:
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = TRUE;
	    buffer = QString::null;
	    break;
	case StateCCommentStart2:
	    string->setFormat( i - 1, 2, formatComment, FALSE );
	    makeLastStandard = FALSE;
	    buffer = QString::null;
	    break;
	case StateCppCommentStart2:
	    string->setFormat( i - 1, 2, formatComment, FALSE );
	    makeLastStandard = FALSE;
	    buffer = QString::null;
	    break;
	case StateCComment:
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = FALSE;
	    string->setFormat( i, 1, formatComment, FALSE );
	    buffer = QString::null;
	    break;
	case StateCppComment:
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = FALSE;
	    string->setFormat( i, 1, formatComment, FALSE );
	    buffer = QString::null;
	    break;
	case StateCCommentEnd1:
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = FALSE;
	    string->setFormat( i, 1, formatComment, FALSE );
	    buffer = QString::null;
	    break;
	case StateCCommentEnd2:
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = FALSE;
	    string->setFormat( i, 1, formatComment, FALSE );
	    buffer = QString::null;
	    break;
	case StateStringStart:
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = FALSE;
	    string->setFormat( i, 1, formatStandard, FALSE );
	    buffer = QString::null;
	    break;
	case StateString:
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = FALSE;
	    string->setFormat( i, 1, formatString, FALSE );
	    buffer = QString::null;
	    break;
	case StateStringEnd:
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = FALSE;
	    string->setFormat( i, 1, formatStandard, FALSE );
	    buffer = QString::null;
	    break;
	case StateString2Start:
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = FALSE;
	    string->setFormat( i, 1, formatStandard, FALSE );
	    buffer = QString::null;
	    break;
	case StateString2:
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = FALSE;
	    string->setFormat( i, 1, formatString, FALSE );
	    buffer = QString::null;
	    break;
	case StateString2End:
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = FALSE;
	    string->setFormat( i, 1, formatStandard, FALSE );
	    buffer = QString::null;
	    break;
	case StateNumber:
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = FALSE;
	    string->setFormat( i, 1, formatNumber, FALSE );
	    buffer = QString::null;
	    break;
	case StatePreProcessor:
	    if ( makeLastStandard )
		string->setFormat( i - 1, 1, formatStandard, FALSE );
	    makeLastStandard = FALSE;
	    string->setFormat( i, 1, formatPreProcessor, FALSE );
	    buffer = QString::null;
	    break;
	}

	lastChar = c;
	i++;
	if ( i >= string->length() )
	    break;
    }

    string->setExtraData( paragData );

    int oldEndState = string->endState();
    if ( state == StateCComment ||
	 state == StateCCommentEnd1 ) {
	string->setEndState( StateCComment );
    } else if ( state == StateString ) {
	string->setEndState( StateString );
    } else if ( state == StateString2 ) {
	string->setEndState( StateString2 );
    } else {
	string->setEndState( StateStandard );
    }

    string->setFirstPreProcess( FALSE );

    QTextParagraph *p = string->next();
    if ( (!!oldEndState || !!string->endState()) && oldEndState != string->endState() &&
	 invalidate && p && !p->firstPreProcess() && p->endState() != -1 ) {
	while ( p ) {
	    if ( p->endState() == -1 )
		return;
	    p->setEndState( -1 );
	    p = p->next();
	}
    }
}

QTextFormat *SyntaxHighlighter_CPP::format( int id )
{
    if ( lastFormatId == id  && lastFormat )
	return lastFormat;

    QTextFormat *f = formats[ id ];
    lastFormat = f ? f : formats[ 0 ];
    lastFormatId = id;
    return lastFormat;
}

void SyntaxHighlighter_CPP::addFormat( int id, QTextFormat *f )
{
    formats.insert( id, f );
}

void SyntaxHighlighter_CPP::removeFormat( int id )
{
    formats.remove( id );
}