fetchtr.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

                com = "";
                if ( match(Tok_RightParen) || (match(Tok_Comma) &&
                        matchStringOrNull(&com) && match(Tok_RightParen)) ) {
                    if ( prefix.isNull() ) {
                        context = functionContext;
                        if ( !namespaces.isEmpty() )
                            context.prepend( ((namespaces.join(QString("::")) +
                                              QString("::"))).toAscii() );
                    } else {
                        context = prefix;
                    }
                    prefix = (const char *) 0;

                    if ( qualifiedContexts.contains(context) )
                        context = qualifiedContexts[context];
                    tor->insert( MetaTranslatorMessage(context, text, com,
                                                       QString(), utf8) );

                    if ( lacks_Q_OBJECT.contains(context) ) {
                        qWarning( "%s:%d: Class '%s' lacks Q_OBJECT macro",
                                  (const char *) yyFileName, yyLineNo,
                                  (const char *) context );
                        lacks_Q_OBJECT.remove( context );
                    } else {
                        needs_Q_OBJECT.insert( context, 0 );
                    }
                }
            }
            break;
        case Tok_translate:
            utf8 = false;
            yyTok = getToken();
            if ( match(Tok_LeftParen) &&
                 matchString(&context) &&
                 match(Tok_Comma) &&
                 matchString(&text) ) {
                 com = "";
                 if ( match(Tok_RightParen) ||
                     (match(Tok_Comma) &&
                      matchStringOrNull(&com) &&
                      (match(Tok_RightParen) ||
                       match(Tok_Comma) &&
                       matchEncoding(&utf8) &&
                       match(Tok_RightParen))) )
                    tor->insert( MetaTranslatorMessage(context, text, com,
                                                       QString(), utf8) );
            }
            break;
        case Tok_Q_OBJECT:
            missing_Q_OBJECT = false;
            yyTok = getToken();
            break;
        case Tok_Ident:
            if ( !prefix.isNull() )
                prefix += "::";
            prefix += yyIdent;
            yyTok = getToken();
            if ( yyTok != Tok_Gulbrandsen )
                prefix = (const char *) 0;
            break;
        case Tok_Comment:
            com = yyComment;
            com = com.simplified();
            if ( com.left(sizeof(MagicComment) - 1) == MagicComment ) {
                com.remove( 0, sizeof(MagicComment) - 1 );
                int k = com.indexOf( ' ' );
                if ( k == -1 ) {
                    context = com;
                } else {
                    context = com.left( k );
                    com.remove( 0, k + 1 );
                    tor->insert( MetaTranslatorMessage(context, "", com,
                                                       QString(), false) );
                }

                /*
                  Provide a backdoor for people using "using
                  namespace". See the manual for details.
                */
                k = 0;
                while ( (k = context.indexOf("::", k)) != -1 ) {
                    qualifiedContexts.insert( context.mid(k + 2), context );
                    k++;
                }
            }
            yyTok = getToken();
            break;
        case Tok_Arrow:
            yyTok = getToken();
            if ( yyTok == Tok_tr || yyTok == Tok_trUtf8 )
                qWarning( "%s:%d: Cannot invoke tr() like this",
                          (const char *) yyFileName, yyLineNo );
            break;
        case Tok_Gulbrandsen:
            // at top level?
            if ( yyBraceDepth == (int) namespaces.count() && yyParenDepth == 0 )
                functionContext = prefix;
            yyTok = getToken();
            break;
        case Tok_RightBrace:
        case Tok_Semicolon:
            if ( yyBraceDepth >= 0 &&
                 yyBraceDepth + 1 == (int) namespaces.count() )
                namespaces.removeAt( namespaces.size()-1 );
            if ( yyBraceDepth == (int) namespaces.count() ) {
                if ( missing_Q_OBJECT ) {
                    if ( needs_Q_OBJECT.contains(functionContext) ) {
                        qWarning( "%s:%d: Class '%s' lacks Q_OBJECT macro",
                                  (const char *) yyFileName, yyLineNo,
                                  (const char *) functionContext );
                    } else {
                        lacks_Q_OBJECT.insert( functionContext, 0 );
                    }
                }
                functionContext = defaultContext;
                missing_Q_OBJECT = false;
            }
            yyTok = getToken();
            break;
        default:
            yyTok = getToken();
        }
    }

    if ( yyBraceDepth != 0 )
        fprintf( stderr,
                 "%s:%d: Unbalanced braces in C++ code (or abuse of the C++"
                  " preprocessor)\n",
                  (const char *)yyFileName, yyBraceLineNo );
    else if ( yyParenDepth != 0 )
        fprintf( stderr,
                 "%s:%d: Unbalanced parentheses in C++ code (or abuse of the C++"
                 " preprocessor)\n",
                 (const char *)yyFileName, yyParenLineNo );
}

void fetchtr_cpp( const char *fileName, MetaTranslator *tor,
                  const char *defaultContext, bool mustExist, const QByteArray &codecForSource )
{
#if defined(_MSC_VER) && _MSC_VER >= 1400
	if (fopen_s(&yyInFile, fileName, "r")) {
		if ( mustExist ) {
			char buf[100];
			strerror_s(buf, sizeof(buf), errno);
			fprintf( stderr,
                     "lupdate error: Cannot open C++ source file '%s': %s\n",
                     fileName, buf );
		}
#else
    yyInFile = fopen( fileName, "r" );
	if ( yyInFile == 0 ) {
        if ( mustExist )
            fprintf( stderr,
                     "lupdate error: Cannot open C++ source file '%s': %s\n",
                     fileName, strerror(errno) );
#endif
        return;
    }

	startTokenizer( fileName, getCharFromFile, tor->codecForTr(), QTextCodec::codecForName(codecForSource) );
    parse( tor, 0, defaultContext );
    fclose( yyInFile );
}

/*
  In addition to C++, we support Qt Designer UI files.
*/

/*
  Fetches tr() calls in C++ code in UI files (inside "<function>"
  tag). This mechanism is obsolete.
*/
void fetchtr_inlined_cpp( const char *fileName, const QString& in,
                          MetaTranslator *tor, const char *context )
{
    yyInStr = in;
    startTokenizer( fileName, getCharFromString, 0, 0 );
    parse( tor, context, 0 );
    yyInStr.clear();
}

class UiHandler : public QXmlDefaultHandler
{
public:
    UiHandler( MetaTranslator *translator, const char *fileName )
        : tor( translator ), fname( fileName ), comment( "" ) { }

    virtual bool startElement( const QString& namespaceURI,
                               const QString& localName, const QString& qName,
                               const QXmlAttributes& atts );
    virtual bool endElement( const QString& namespaceURI,
                             const QString& localName, const QString& qName );
    virtual bool characters( const QString& ch );
    virtual bool fatalError( const QXmlParseException& exception );

private:
    void flush();

    MetaTranslator *tor;
    QByteArray fname;
    QString context;
    QString source;
    QString comment;

    QString accum;

    bool trString;
};

bool UiHandler::startElement( const QString& /* namespaceURI */,
                              const QString& /* localName */,
                              const QString& qName,
                              const QXmlAttributes& atts )
{
    if ( qName == QString("item") ) {
        flush();
        if ( !atts.value(QString("text")).isEmpty() )
            source = atts.value( QString("text") );
    } else if ( qName == QString("string") ) {
        flush();
        if (atts.value(QString("notr")).isEmpty() ||
            atts.value(QString("notr")) != QString("true")) {
            trString = true;
            comment = atts.value(QString("comment"));
        } else {
            trString = false;
        }
    }
    accum.truncate( 0 );
    return true;
}

bool UiHandler::endElement( const QString& /* namespaceURI */,
                            const QString& /* localName */,
                            const QString& qName )
{
    accum.replace( QRegExp(QString("\r\n")), "\n" );

    if ( qName == QString("class") ) {
        if ( context.isEmpty() )
            context = accum;
    } else if ( qName == QString("string") && trString ) {
        source = accum;
    } else if ( qName == QString("comment") ) {
        comment = accum;
        flush();
    } else if ( qName == QString("function") ) {
        fetchtr_inlined_cpp( (const char *) fname, accum, tor,
                             context.toLatin1() );
    } else {
        flush();
    }
    return true;
}

bool UiHandler::characters( const QString& ch )
{
    accum += ch;
    return true;
}

bool UiHandler::fatalError( const QXmlParseException& exception )
{
    QString msg;
    msg.sprintf( "Parse error at line %d, column %d (%s).",
                 exception.lineNumber(), exception.columnNumber(),
                 exception.message().toLatin1().data() );
    fprintf( stderr, "XML error: %s\n", msg.toLatin1().data() );
    return false;
}

void UiHandler::flush()
{
    if ( !context.isEmpty() && !source.isEmpty() )
        tor->insert( MetaTranslatorMessage(context.toUtf8(), source.toUtf8(),
                                           comment.toUtf8(), QString(),
                                           true) );
    source.truncate( 0 );
    comment.truncate( 0 );
}

void fetchtr_ui( const char *fileName, MetaTranslator *tor,
                 const char * /* defaultContext */, bool mustExist )
{
    QFile f( fileName );
    if ( !f.open(QIODevice::ReadOnly) ) {
		if ( mustExist ) {
#if defined(_MSC_VER) && _MSC_VER >= 1400
			char buf[100];
			strerror_s(buf, sizeof(buf), errno);
			fprintf( stderr, "lupdate error: cannot open UI file '%s': %s\n",
                     fileName, buf );
#else
            fprintf( stderr, "lupdate error: cannot open UI file '%s': %s\n",
                     fileName, strerror(errno) );
#endif
		}
        return;
    }

    QXmlInputSource in( &f );
    QXmlSimpleReader reader;
    reader.setFeature( "http://xml.org/sax/features/namespaces", false );
    reader.setFeature( "http://xml.org/sax/features/namespace-prefixes", true );
    reader.setFeature( "http://trolltech.com/xml/features/report-whitespace"
                       "-only-CharData", false );
    QXmlDefaultHandler *hand = new UiHandler( tor, fileName );
    reader.setContentHandler( hand );
    reader.setErrorHandler( hand );

    if ( !reader.parse(in) )
        fprintf( stderr, "%s: Parse error in UI file\n", fileName );
    reader.setContentHandler( 0 );
    reader.setErrorHandler( 0 );
    delete hand;
    f.close();
}