metabundle.cpp

来自「Amarok是一款在LINUX或其他类UNIX操作系统中运行的音频播放器软件。 」· C++ 代码 · 共 1,884 行 · 第 1/5 页

        case Bitrate:    setBitrate(    newText.toInt() );   break;
        case SampleRate: setSampleRate( newText.toInt() );   break;
        case Score:      setScore(      newText.toFloat() ); break;
        case Rating:     setRating(     newText.toInt() );   break;
        case PlayCount:  setPlayCount(  newText.toInt() );   break;
        case LastPlayed: setLastPlay(   newText.toInt() );   break;
        case Filesize:   setFilesize(   newText.toInt() );   break;
        case Type:       setFileType(   newText.toInt() );   break;
        default: warning() << "Tried to set the text of an immutable or nonexistent column! [" << column << endl;
   }
}

QString MetaBundle::exactText( int column, bool ensureCached ) const
{
    switch( column )
    {
        case Filename:   return filename();
        case Title:      return title();
        case Artist:     return artist();
        case AlbumArtist: return albumArtist();
        case Composer:   return composer();
        case Year:       return QString::number( year() );
        case Album:      return album();
        case DiscNumber: return QString::number( discNumber() );
        case Track:      return QString::number( track() );
        case Bpm:        return QString::number( bpm() );
        case Genre:      return genre();
        case Comment:    return comment();
        case Directory:  return directory();
        case Type:       return QString::number( fileType() );
        case Length:     return QString::number( length() );
        case Bitrate:    return QString::number( bitrate() );
        case SampleRate: return QString::number( sampleRate() );
        case Score:      return QString::number( score( ensureCached ) );
        case Rating:     return QString::number( rating( ensureCached ) );
        case PlayCount:  return QString::number( playCount( ensureCached ) );
        case LastPlayed: return QString::number( lastPlay( ensureCached ) );
        case Filesize:   return QString::number( filesize() );
        case Mood:       return QString();
        default: warning() << "Tried to get the text of a nonexistent column! [" << column << endl;
    }

    return QString(); //shouldn't happen
}

QString MetaBundle::prettyText( int column ) const
{
    QString text;
    switch( column )
    {
        case Filename:   text = isFile() ? MetaBundle::prettyTitle(filename()) : url().prettyURL();  break;
        case Title:      text = title().isEmpty() ? MetaBundle::prettyTitle( filename() ) : title(); break;
        case Artist:     text = artist();                                                            break;
        case AlbumArtist: text = albumArtist();                                                      break;
        case Composer:   text = composer();                                                          break;
        case Year:       text = year() ? QString::number( year() ) : QString::null;                  break;
        case Album:      text = album();                                                             break;
        case DiscNumber: text = discNumber() ? QString::number( discNumber() ) : QString::null;      break;
        case Bpm:        text = bpm() ? QString::number( bpm() ) : QString::null;                    break;
        case Track:      text = track() ? QString::number( track() ) : QString::null;                break;
        case Genre:      text = genre();                                                             break;
        case Comment:    text = comment();                                                           break;
        case Directory:  text = url().isEmpty() ? QString() : directory();                           break;
        case Type:       text = url().isEmpty() ? QString() : type();                                break;
        case Length:     text = prettyLength( length(), true );                                      break;
        case Bitrate:    text = prettyBitrate( bitrate() );                                          break;
        case SampleRate: text = prettySampleRate();                                                  break;
        case Score:      text = QString::number( static_cast<int>( score() ) );                      break;
        case Rating:     text = prettyRating();                                                      break;
        case PlayCount:  text = QString::number( playCount() );                                      break;
        case LastPlayed: text = Amarok::verboseTimeSince( lastPlay() );                              break;
        case Filesize:   text = prettyFilesize();                                                    break;
        case Mood:
          text = moodbar_const().state() == Moodbar::JobRunning ? i18n( "Calculating..." )
               : moodbar_const().state() == Moodbar::JobQueued  ? i18n( "Queued..." )
               : QString::null;
        break;
        default: warning() << "Tried to get the text of a nonexistent column!" << endl;              break;
    }

    return text.stripWhiteSpace();
}

bool MetaBundle::matchesSimpleExpression( const QString &expression, const QValueList<int> &columns ) const
{
    const QStringList terms = QStringList::split( ' ', expression.lower() );
    bool matches = true;
    for( uint x = 0; matches && x < terms.count(); ++x )
    {
        uint y = 0, n = columns.count();
        for(; y < n; ++y )
            if ( prettyText( columns[y] ).lower().contains( terms[x] ) )
                break;
        matches = ( y < n );
    }

    return matches;
}

void MetaBundle::reactToChanges( const QValueList<int>& columns)
{
    // mark search dirty if we need to
    for (uint i = 0; !m_isSearchDirty && i < columns.count(); i++)
        if ((m_searchColumns & (1 << columns[i])) > 0)
            m_isSearchDirty = true;
}

bool MetaBundle::matchesFast(const QStringList &terms, ColumnMask columnMask) const
{
    // simple search for rating, last played, etc. makes no sense and it hurts us a
    // lot if we have to fetch it from the db. so zero them out
    columnMask &= ~( 1<<Score | 1<<Rating | 1<<PlayCount | 1<<LastPlayed | 1<<Mood );

    if (m_isSearchDirty || m_searchColumns != columnMask) {
        // assert the size of ColumnMask is large enough. In the absence of
        // a compile assert mechanism, this is pretty much as good for
        // optimized code (ie, free)

        if ( sizeof(ColumnMask) < (NUM_COLUMNS / 8) ) {
            warning() << "ColumnMask is not big enough!\n";
        }

        // recompute search text
        // There is potential for mishap here if matchesFast gets called from multiple
        // threads, but it's *highly* unlikely that something bad will happen
        m_isSearchDirty = false;
        m_searchColumns = columnMask;
        m_searchStr.setLength(0);

        for (int i = 0; i < NUM_COLUMNS; i++) {
            if ((columnMask & (1 << i)) > 0) {
                if (!m_searchStr.isEmpty()) m_searchStr += ' ';
                m_searchStr += prettyText(i).lower();
            }
        }
    }

    // now search
    for (uint i = 0; i < terms.count(); i++) {
        if (!m_searchStr.contains(terms[i])) return false;
    }

    return true;
}


bool MetaBundle::matchesExpression( const QString &expression, const QValueList<int> &defaultColumns ) const
{
    return matchesParsedExpression( ExpressionParser::parse( expression ), defaultColumns );
}

bool MetaBundle::matchesParsedExpression( const ParsedExpression &data, const QValueList<int> &defaults ) const
{
    for( uint i = 0, n = data.count(); i < n; ++i ) //check each part for matchiness
    {
        bool b = false; //whether at least one matches
        for( uint ii = 0, count = data[i].count(); ii < count; ++ii )
        {
            expression_element e = data[i][ii];
            int column = -1;
            if( !e.field.isEmpty() )
            {
                QString field = e.field.lower();
                column = columnIndex( field );
                if( column == -1 )
                {
                    column = -2;
                    if( field == "size" )
                        field = "filesize";
                    else if( field == "filetype" )
                        field = "type";
                    else if( field == "disc" )
                        field = "discnumber";
                    else
                        column = -1;

                    if( column == -2 )
                        column = columnIndex( field );
                }
            }
            if( column >= 0 ) //a field was specified and it exists
            {
                QString q = e.text, v = prettyText( column ).lower(), w = q.lower();
                //q = query, v = contents of the field, w = match against it
                bool condition; //whether it matches, not taking e.negateation into account

                bool numeric;
                switch( column )
                {
                    case Year:
                    case DiscNumber:
                    case Track:
                    case Bpm:
                    case Bitrate:
                    case SampleRate:
                    case Score:
                    case PlayCount:
                    case LastPlayed:
                    case Filesize:
                        numeric = true;
                        break;
                    default:
                        numeric = false;
                }

                if( column == Filesize )
                {
                    v = QString::number( filesize() );
                    if( w.endsWith( "m" ) )
                        w = QString::number( w.left( w.length()-1 ).toLong() * 1024 * 1024 );
                    else if( w.endsWith( "k" ) )
                        w = QString::number( w.left( w.length()-1 ).toLong() * 1024 );
                }

                if( e.match == expression_element::More )
                {
                    if( numeric )
                        condition = v.toInt() > w.toInt();
                    else if( column == Rating )
                        condition = v.toFloat() > w.toFloat();
                    else if( column == Length )
                    {
                        int g = v.find( ':' ), h = w.find( ':' );
                        condition = v.left( g ).toInt() > w.left( h ).toInt() ||
                                    ( v.left( g ).toInt() == w.left( h ).toInt() &&
                                      v.mid( g + 1 ).toInt() > w.mid( h + 1 ).toInt() );
                    }
                    else
                        condition = v > w; //compare the strings
                }
                else if( e.match == expression_element::Less )
                {
                    if( numeric )
                        condition = v.toInt() < w.toInt();
                    else if( column == Rating )
                        condition = v.toFloat() < w.toFloat();
                    else if( column == Length )
                    {
                        int g = v.find( ':' ), h = w.find( ':' );
                        condition = v.left( g ).toInt() < w.left( h ).toInt() ||
                                    ( v.left( g ).toInt() == w.left( h ).toInt() &&
                                      v.mid( g + 1 ).toInt() < w.mid( h + 1 ).toInt() );
                    }
                    else
                        condition = v < w;
                }
                else
                {
                    if( numeric )
                        condition = v.toInt() == w.toInt();
                    else if( column == Rating )
                        condition = v.toFloat() == w.toFloat();
                    else if( column == Length )
                    {
                        int g = v.find( ':' ), h = w.find( ':' );
                        condition = v.left( g ).toInt() == w.left( h ).toInt() &&
                                    v.mid( g + 1 ).toInt() == w.mid( h + 1 ).toInt();
                    }
                    else
                        condition = v.contains( q, false );
                }
                if( condition == ( e.negate ? false : true ) )
                {
                    b = true;
                    break;
                }
            }
            else //check just the default fields
            {
                for( int it = 0, end = defaults.size(); it != end; ++it )
                {
                    b = prettyText( defaults[it] ).contains( e.text, false ) == ( e.negate ? false : true );
                    if( ( e.negate && !b ) || ( !e.negate && b ) )
                        break;
                }
                if( b )
                    break;
            }
        }
        if( !b )
            return false;
    }

    return true;
}

QString
MetaBundle::prettyTitle() const
{
    QString s = artist();

    //NOTE this gets regressed often, please be careful!
    //     whatever you do, handle the stream case, streams have no artist but have an excellent title

    //FIXME doesn't work for resume playback

    if( s.isEmpty() )
        s = title();
    else
        s = i18n("%1 - %2").arg( artist(), title() );

    if( s.isEmpty() ) s = prettyTitle( filename() );

    return s;
}

QString
MetaBundle::veryNiceTitle() const
{
    QString s;
    //NOTE I'm not sure, but the notes and FIXME's in the prettyTitle function should be fixed now.
    //     If not then they do apply to this function also!
    if( !title().isEmpty() )
    {
        if( !artist().isEmpty() )
            s = i18n( "%1 by %2" ).arg( title(), artist() );
        else
            s = title();
    }
    else
    {
        s = prettyTitle( filename() );
    }
    return s;
}

QString
MetaBundle::prettyTitle( const QString &filename ) //static
{
    QString s = filename; //just so the code is more readable

    //remove .part extension if it exists
    if (s.endsWith( ".part" ))
        s = s.left( s.length() - 5 );

    //remove file extension, s/_/ /g and decode %2f-like sequences
    s = s.left( s.findRev( '.' ) ).replace( '_', ' ' );
    s = KURL::decode_string( s );

    return s;
}

QString
MetaBundle::prettyLength( int seconds, bool showHours ) //static
{
    if( seconds > 0 ) return prettyTime( seconds, showHours );
    if( seconds == Undetermined ) return "?";
    if( seconds == Irrelevant  ) return "-";

    return QString(); //Unavailable = ""
}

QString
MetaBundle::prettyTime( uint seconds, bool showHours ) //static
{
    QString s = QChar( ':' );
    s.append( zeroPad( seconds % 60 ) ); //seconds
    seconds /= 60;

    if( showHours && seconds >= 60)
    {
        s.prepend( zeroPad( seconds % 60 ) ); //minutes
        s.prepend( ':' );
        seconds /= 60;
    }

    //don't zeroPad the last one, as it can be greater than 2 digits
    s.prepend( QString::number( seconds ) ); //hours or minutes depending on above if block

    return s;
}

QString
MetaBundle::veryPrettyTime( int time )
{
    if( time == Undetermined )
        return i18n( "?" );