contextbrowser.cpp

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。 经过两年开发后

    {
        newMetaData = true;
        const QString timeString = KGlobal::locale()->formatTime( QTime::currentTime() ).replace(" ", " "); // don't break over lines
        m_metadataHistory.prepend( QString( "<td valign='top'>" + timeString + "&nbsp;</td><td align='left'>" + escapeHTML( bundle.prettyTitle() ) + "</td>" ) );
    }

    if ( currentPage() == m_contextTab && ( bundle.url() != m_currentURL || newMetaData || !trackChanged ) )
        showCurrentTrack();
    else if ( currentPage() == m_lyricsTab )
    {
        EngineController::engine()->isStream() ?
                lyricsRefresh() : // can't call showLyrics() because the url hasn't changed
                showLyrics()    ;
    }
    else if ( CollectionDB::instance()->isEmpty() || !CollectionDB::instance()->isValid() )
        showCurrentTrack();

    if (trackChanged)
    {
        m_cuefile->clear();

        if (bundle.url().isLocalFile())
        {

            /** The cue file that is provided with the media might have different name than the
             * media file itself, hence simply cutting the media extension and adding ".cue"
             * is not always enough to find the matching cue file. In such cases we have
             * to search for all the cue files in the directory and have a look inside them for
             * the matching FILE="" stanza. However the FILE="" stanza does not always
             * point at the corresponding media file (e.g. it is quite often set to the misleading
             * FILE="audio.wav" WAV). Therfore we also have to check blindly if there is a cue
             * file having the same name as the media file played, as described above.
             */

            // look for the cue file that matches the media file played first
            QString path    = bundle.url().path();
            QString cueFile = path.left( path.findRev('.') ) + ".cue";

            m_cuefile->setCueFileName( cueFile );

            if( m_cuefile->load( bundle.length() ) )
                debug() << "[CUEFILE]: " << cueFile << " - Shoot blindly, found and loaded. " << endl;

            // if unlucky, let's have a look inside cue files, if any
            else
            {
                debug() << "[CUEFILE]: " << cueFile << " - Shoot blindly and missed, searching for other cue files." << endl;

                bool foundCueFile = false;
                QDir dir ( bundle.directory() );
                dir.setFilter( QDir::Files ) ;
                dir.setNameFilter( "*.cue *.CUE" ) ;

                QStringList cueFilesList = dir.entryList();

                if ( !cueFilesList.empty() )
                    for ( QStringList::Iterator it = cueFilesList.begin(); it != cueFilesList.end() && !foundCueFile; ++it )
                    {
                        QFile file ( dir.filePath(*it) );
                        if( file.open( IO_ReadOnly ) )
                        {
                            debug() << "[CUEFILE]: " << *it << " - Opened, looking for the matching FILE stanza." << endl;
                            QTextStream stream( &file );
                            QString line;

                            while ( !stream.atEnd() && !foundCueFile)
                            {
                                line = stream.readLine().simplifyWhiteSpace();

                                if( line.startsWith( "file", false ) )
                                {
                                    line = line.mid( 5 ).remove( '"' );

                                    if ( line.contains( bundle.filename(), false ) )
                                    {
                                        cueFile = dir.filePath(*it);
                                        foundCueFile = true;
                                        m_cuefile->setCueFileName( cueFile );
                                        if( m_cuefile->load( bundle.length() ) )
                                            debug() << "[CUEFILE]: " << cueFile << " - Looked inside cue files, found and loaded proper one" << endl;
                                    }
                                }
                            }

                            file.close();
                        }
                    }

                if ( !foundCueFile )
                    debug() << "[CUEFILE]: - Didn't find any matching cue file." << endl;
            }
        }
    }
}


void ContextBrowser::engineStateChanged( Engine::State state, Engine::State oldState )
{
    DEBUG_BLOCK

    if( state != Engine::Paused /*pause*/ && oldState != Engine::Paused /*resume*/
        || state == Engine::Empty )
    {
        // Pause shouldn't clear everything (but stop should, even when paused)
        m_dirtyCurrentTrackPage = true;
        m_dirtyLyricsPage = true;
        m_wikiJob = 0; //let's forget previous wiki-fetching jobs
    }

    switch( state )
    {
        case Engine::Empty:
            m_metadataHistory.clear();
            if ( currentPage() == m_contextTab || currentPage() == m_lyricsTab )
            {
                showCurrentTrack();
            }
            blockSignals( true );
            setTabEnabled( m_lyricsTab, false );
            if ( currentPage() != m_wikiTab ) {
                setTabEnabled( m_wikiTab, false );
                m_dirtyWikiPage = true;
            }
            else // current tab is wikitab, disable some buttons.
            {
                m_wikiToolBar->setItemEnabled( WIKI_ARTIST, false );
                m_wikiToolBar->setItemEnabled( WIKI_ALBUM, false );
                m_wikiToolBar->setItemEnabled( WIKI_TITLE, false );
            }
            blockSignals( false );
            break;

        case Engine::Playing:
            if ( oldState != Engine::Paused )
                m_metadataHistory.clear();
            blockSignals( true );
            setTabEnabled( m_lyricsTab, true );
            setTabEnabled( m_wikiTab, true );
            m_wikiToolBar->setItemEnabled( WIKI_ARTIST, true );
            m_wikiToolBar->setItemEnabled( WIKI_ALBUM, true );
            m_wikiToolBar->setItemEnabled( WIKI_TITLE, true );
            blockSignals( false );
            break;

        default:
            ;
    }
}

void ContextBrowser::saveHtmlData()
{
    QFile exportedDocument( Amarok::saveLocation() + "contextbrowser.html" );
    if ( !exportedDocument.open( IO_WriteOnly ) )
        warning() << "Failed to open file " << exportedDocument.name()
        << " write-only" << endl;
    else {
        QTextStream stream( &exportedDocument );
        stream.setEncoding( QTextStream::UnicodeUTF8 );
        stream << m_HTMLSource // the pure html data..
            .replace( "<html>",
                      QString( "<html><head><style type=\"text/css\">"
                               "%1</style></head>" )
                          .arg( HTMLView::loadStyleSheet() ) ); // and the
                                                                // stylesheet
                                                                // code
        exportedDocument.close();
    }
}


void ContextBrowser::paletteChange( const QPalette& /* pal */ )
{
//     KTabWidget::paletteChange( pal );
    HTMLView::paletteChange();
    reloadStyleSheet();
}

void ContextBrowser::reloadStyleSheet()
{
    m_currentTrackPage->setUserStyleSheet( HTMLView::loadStyleSheet() );
    m_lyricsPage->setUserStyleSheet( HTMLView::loadStyleSheet() );
    m_wikiPage->setUserStyleSheet( HTMLView::loadStyleSheet() );
}

//////////////////////////////////////////////////////////////////////////////////////////
// PROTECTED SLOTS
//////////////////////////////////////////////////////////////////////////////////////////

//parts of this function from ktabwidget.cpp, copyright (C) 2003 Zack Rusin and Stephan Binner
//fucking setCurrentTab() isn't virtual so we have to override this instead =(
void ContextBrowser::wheelDelta( int delta )
{
    if ( count() < 2 || delta == 0 )
        return;

    int index = currentPageIndex(), start = index;
    do
    {
        if( delta < 0 )
            index = (index + 1) % count();
        else
        {
            index = index - 1;
            if( index < 0 )
                index = count() - 1;
        }
        if( index == start ) // full circle, none enabled
            return;
    } while( !isTabEnabled( page( index ) ) );
    setCurrentPage( index );
}


//////////////////////////////////////////////////////////////////////////////////////////
// PRIVATE SLOTS
//////////////////////////////////////////////////////////////////////////////////////////

void ContextBrowser::tabChanged( QWidget *page )
{
DEBUG_FUNC_INFO
    setFocusProxy( page ); //so focus is given to a sensible widget when the tab is opened

    if ( page == m_contextTab )
        showCurrentTrack();
    else if ( page == m_lyricsTab )
        showLyrics();
    else if ( page == m_wikiTab )
        showWikipedia();
}

void ContextBrowser::slotContextMenu( const QString& urlString, const QPoint& point )
{
    enum { APPEND, ASNEXT, MAKE, MEDIA_DEVICE, INFO, TITLE, RELATED, SUGGEST, FAVES, FRESHPODCASTS, NEWALBUMS, FAVALBUMS, LABELS };
    debug() << "url string: " << urlString << endl;

    if( urlString.startsWith( "musicbrainz"     ) ||
        urlString.startsWith( "externalurl"     ) ||
        urlString.startsWith( "show:suggest"    ) ||
        urlString.startsWith( "http"            ) ||
        urlString.startsWith( "wikipedia"       ) ||
        urlString.startsWith( "seek"            ) ||
        urlString.startsWith( "ggartist"        ) ||
        urlString.startsWith( "artistback"      ) ||
        urlString.startsWith( "current"         ) ||
        urlString.startsWith( "lastfm"          ) ||
        urlString.startsWith( "showlabel"       ) ||
        urlString.startsWith( "show:editLabels" ) ||
        currentPage() != m_contextTab  )
        return;

    KURL url( urlString );

    KPopupMenu menu;
    KURL::List urls( url );
    QString artist, album, track; // track unused here
    Amarok::albumArtistTrackFromUrl( url.path(), artist, album, track );

    if( urlString.isEmpty() )
    {
        debug() << "url string empty. loaded?" << EngineController::engine()->loaded() << endl;
        if( EngineController::engine()->loaded() )
        {
            menu.setCheckable( true );
            menu.insertItem( i18n("Show Labels"), LABELS );
            menu.insertItem( i18n("Show Related Artists"), RELATED );
            menu.insertItem( i18n("Show Suggested Songs"), SUGGEST );
            menu.insertItem( i18n("Show Favorite Tracks"), FAVES );

            menu.setItemChecked( RELATED, m_showRelated );
            menu.setItemChecked( SUGGEST, m_showSuggested );
            menu.setItemChecked( FAVES,   m_showFaves );
            menu.setItemChecked( LABELS, m_showLabels );
        } else {
            // the home info page
            menu.setCheckable( true );
            menu.insertItem( i18n("Show Fresh Podcasts"), FRESHPODCASTS );
            menu.insertItem( i18n("Show Newest Albums"), NEWALBUMS );
            menu.insertItem( i18n("Show Favorite Albums"), FAVALBUMS );

            menu.setItemChecked( FRESHPODCASTS, m_showFreshPodcasts );
            menu.setItemChecked( NEWALBUMS, m_showNewestAlbums );
            menu.setItemChecked( FAVALBUMS, m_showFavoriteAlbums );
        }
    }
    else if( url.protocol() == "fetchcover" )
    {
        Amarok::coverContextMenu( this, point, artist, album );
        return;
    }
    else if( url.protocol() == "stream" )
    {
        url = KURL::fromPathOrURL( url.url().replace( QRegExp( "^stream:" ), "http:" ) );
        urls = KURL::List( url );
        menu.insertTitle( i18n("Podcast"), TITLE );
        menu.insertItem( SmallIconSet( Amarok::icon( "files" ) ), i18n( "&Load" ), MAKE );
        menu.insertItem( SmallIconSet( Amarok::icon( "add_playlist" ) ), i18n( "&Append to Playlist" ), APPEND );
        menu.insertItem( SmallIconSet( Amarok::icon( "queue_track" ) ), i18n( "&Queue Podcast" ), ASNEXT );
        //menu.insertSeparator();
        //menu.insertItem( SmallIconSet( "down" ), i18n( "&Download" ), DOWNLOAD );
    }
    else if( url.protocol() == "file" || url.protocol() == "artist" || url.protocol() == "album" || url.protocol() == "compilation" || url.protocol() == "albumdisc" || url.protocol() == "compilationdisc")
    {
        //TODO it would be handy and more usable to have this menu under the cover one too

        menu.insertTitle( i18n("Track"), TITLE );
        menu.insertItem( SmallIconSet( Amarok::icon( "files" ) ), i18n( "&Load" ), MAKE );
        menu.insertItem( SmallIconSet( Amarok::icon( "add_playlist" ) ), i18n( "&Append to Playlist" ), APPEND );
        menu.insertItem( SmallIconSet( Amarok::icon( "queue_track" ) ), i18n( "&Queue Track" ), ASNEXT );
        if( MediaBrowser::isAvailable() )
            menu.insertItem( SmallIconSet( Amarok::icon( "device" ) ), i18n( "&Transfer to Media Device" ), MEDIA_DEVICE );

        menu.insertSeparator();
        menu.insertItem( SmallIconSet( Amarok::icon( "info" ) ), i18n( "Edit Track &Information..." ), INFO );

        if ( url.protocol() == "artist" )
        {
            urls = expandURL( url );

            menu.changeTitle( TITLE, i18n("Artist") );
            menu.changeItem( INFO,   i18n("Edit Artist &Information..." ) );
            menu.changeItem( ASNEXT, i18n("&Queue Artist's Songs") );