document.cpp.svn-base

okular

    // if /proc/meminfo doesn't exist, return MEMORY FULL
    QFile memFile( "/proc/meminfo" );
    if ( !memFile.open( QIODevice::ReadOnly ) )
        return 0;

    // read /proc/meminfo and sum up the contents of 'MemFree', 'Buffers'
    // and 'Cached' fields. consider swapped memory as used memory.
    int memoryFree = 0;
    QString entry;
    QTextStream readStream( &memFile );
    while ( !readStream.atEnd() )
    {
        entry = readStream.readLine();
        if ( entry.startsWith( "MemFree:" ) ||
                entry.startsWith( "Buffers:" ) ||
                entry.startsWith( "Cached:" ) ||
                entry.startsWith( "SwapFree:" ) )
            memoryFree += entry.section( ' ', -2, -2 ).toInt();
        if ( entry.startsWith( "SwapTotal:" ) )
            memoryFree -= entry.section( ' ', -2, -2 ).toInt();
    }
    memFile.close();
    return 1024 * memoryFree;
#else
    // tell the memory is full.. will act as in LOW profile
    return 0;
#endif
}

void KPDFDocument::loadDocumentInfo()
// note: load data and stores it internally (document or pages). observers
// are still uninitialized at this point so don't access them
{
    //kDebug() << "Using '" << d->xmlFileName << "' as document info file." << endl;
    QFile infoFile( d->xmlFileName );
    if ( !infoFile.exists() || !infoFile.open( QIODevice::ReadOnly ) )
        return;

    // Load DOM from XML file
    QDomDocument doc( "documentInfo" );
    if ( !doc.setContent( &infoFile ) )
    {
        kDebug() << "Can't load XML pair! Check for broken xml." << endl;
        infoFile.close();
        return;
    }
    infoFile.close();

    QDomElement root = doc.documentElement();
    if ( root.tagName() != "documentInfo" )
        return;

    // Parse the DOM tree
    QDomNode topLevelNode = root.firstChild();
    while ( topLevelNode.isElement() )
    {
        QString catName = topLevelNode.toElement().tagName();

        // Restore page attributes (bookmark, annotations, ...) from the DOM
        if ( catName == "pageList" )
        {
            QDomNode pageNode = topLevelNode.firstChild();
            while ( pageNode.isElement() )
            {
                QDomElement pageElement = pageNode.toElement();
                if ( pageElement.hasAttribute( "number" ) )
                {
                    // get page number (node's attribute)
                    bool ok;
                    int pageNumber = pageElement.attribute( "number" ).toInt( &ok );

                    // pass the domElement to the right page, to read config data from
                    if ( ok && pageNumber >= 0 && pageNumber < (int)pages_vector.count() )
                        pages_vector[ pageNumber ]->restoreLocalContents( pageElement );
                }
                pageNode = pageNode.nextSibling();
            }
        }

        // Restore 'general info' from the DOM
        else if ( catName == "generalInfo" )
        {
            QDomNode infoNode = topLevelNode.firstChild();
            while ( infoNode.isElement() )
            {
                QDomElement infoElement = infoNode.toElement();

                // compatibility: [pre-3.4 viewport storage] @remove after 3.4 relase
                if ( infoElement.tagName() == "activePage" )
                {
                    if ( infoElement.hasAttribute( "viewport" ) )
                        *d->viewportIterator = DocumentViewport( infoElement.attribute( "viewport" ) );
                }

                // restore viewports history
                if ( infoElement.tagName() == "history" )
                {
                    // clear history
                    d->viewportHistory.clear();
                    // append old viewports
                    QDomNode historyNode = infoNode.firstChild();
                    while ( historyNode.isElement() )
                    {
                        QDomElement historyElement = historyNode.toElement();
                        if ( historyElement.hasAttribute( "viewport" ) )
                        {
                            QString vpString = historyElement.attribute( "viewport" );
                            d->viewportIterator = d->viewportHistory.insert( d->viewportHistory.end(), 
                                    DocumentViewport( vpString ) );
                        }
                        historyNode = historyNode.nextSibling();
                    }
                    // consistancy check
                    if ( d->viewportHistory.isEmpty() )
                        d->viewportIterator = d->viewportHistory.insert( d->viewportHistory.end(), DocumentViewport() );
                }
                infoNode = infoNode.nextSibling();
            }
        }

        topLevelNode = topLevelNode.nextSibling();
    } // </documentInfo>
}

QString KPDFDocument::giveAbsolutePath( const QString & fileName )
{
    if ( !d->url.isValid() )
        return QString::null;

    return d->url.upUrl().url() + fileName;
}

bool KPDFDocument::openRelativeFile( const QString & fileName )
{
    QString absFileName = giveAbsolutePath( fileName );
    if ( absFileName.isEmpty() )
        return false;

    kDebug() << "openDocument: '" << absFileName << "'" << endl;

    emit openURL( absFileName );
    return true;
}


void KPDFDocument::saveDocumentInfo() const
{
    if ( d->docFileName.isEmpty() )
        return;

    QFile infoFile( d->xmlFileName );
    if (infoFile.open( QIODevice::WriteOnly | QIODevice::Truncate) )
    {
        // 1. Create DOM
        QDomDocument doc( "documentInfo" );
        QDomElement root = doc.createElement( "documentInfo" );
        doc.appendChild( root );

        // 2.1. Save page attributes (bookmark state, annotations, ... ) to DOM
        QDomElement pageList = doc.createElement( "pageList" );
        root.appendChild( pageList );
        // <page list><page number='x'>.... </page> save pages that hold data
        QVector< KPDFPage * >::const_iterator pIt = pages_vector.begin(), pEnd = pages_vector.end();
        for ( ; pIt != pEnd; ++pIt )
            (*pIt)->saveLocalContents( pageList, doc );

        // 2.2. Save document info (current viewport, history, ... ) to DOM
        QDomElement generalInfo = doc.createElement( "generalInfo" );
        root.appendChild( generalInfo );
        // <general info><history> ... </history> save history up to 10 viewports
        QLinkedList< DocumentViewport >::iterator backIterator = d->viewportIterator;
        if ( backIterator != d->viewportHistory.end() )
        {
            // go back up to 10 steps from the current viewportIterator
            int backSteps = 10;
            while ( backSteps-- && backIterator != d->viewportHistory.begin() )
                --backIterator;

            // create history root node
            QDomElement historyNode = doc.createElement( "history" );
            generalInfo.appendChild( historyNode );

            // add old[backIterator] and present[viewportIterator] items
            QLinkedList< DocumentViewport >::iterator endIt = d->viewportIterator;
            ++endIt;
            while ( backIterator != endIt )
            {
                QString name = (backIterator == d->viewportIterator) ? "current" : "oldPage";
                QDomElement historyEntry = doc.createElement( name );
                historyEntry.setAttribute( "viewport", (*backIterator).toString() );
                historyNode.appendChild( historyEntry );
                ++backIterator;
            }
        }

        // 3. Save DOM to XML file
        QString xml = doc.toString();
        QTextStream os( &infoFile );
        os << xml;
    }
    infoFile.close();
}

void KPDFDocument::slotTimedMemoryCheck()
{
    // [MEM] clean memory (for 'free mem dependant' profiles only)
    if ( KpdfSettings::memoryLevel() != KpdfSettings::EnumMemoryLevel::Low &&
         d->allocatedPixmapsTotalMemory > 1024*1024 )
        cleanupPixmapMemory();
}

void KPDFDocument::slotRotation( int rotation )
{
    if ( generator->supportsRotation() )
    {
        d->rotation = rotation;
        generator->setOrientation(pages_vector,rotation);
        foreachObserver( notifySetup( pages_vector, true ) );
        foreachObserver( notifyContentsCleared (DocumentObserver::Pixmap | DocumentObserver::Highlights | DocumentObserver::Annotations));
//         foreachObserver( notifyViewportChanged( false /*disables smoothMove*/ ));
//         foreachObserver( notifyPageChanged( ) );
        kDebug() << "Rotated: " << rotation << endl;
    }
}

void KPDFDocument::slotPaperSizes( int newsize )
{
    if (generator->supportsPaperSizes())
    {
        generator->setPaperSize(pages_vector,newsize);
        foreachObserver( notifySetup( pages_vector, true ) );
        kDebug() << "PaperSize no: " << newsize << endl;
    }
}

/** DocumentViewport **/

DocumentViewport::DocumentViewport( int n )
    : pageNumber( n )
{
    // default settings
    rePos.enabled = false;
    rePos.normalizedX = 0.5;
    rePos.normalizedY = 0.0;
    rePos.pos = Center;
    autoFit.enabled = false;
    autoFit.width = false;
    autoFit.height = false;
}

DocumentViewport::DocumentViewport( const QString & xmlDesc )
    : pageNumber( -1 )
{
    // default settings (maybe overridden below)
    rePos.enabled = false;
    rePos.normalizedX = 0.5;
    rePos.normalizedY = 0.0;
    rePos.pos = Center;
    autoFit.enabled = false;
    autoFit.width = false;
    autoFit.height = false;

    // check for string presence
    if ( xmlDesc.isEmpty() )
        return;

    // decode the string
    bool ok;
    int field = 0;
    QString token = xmlDesc.section( ';', field, field );
    while ( !token.isEmpty() )
    {
        // decode the current token
        if ( field == 0 )
        {
            pageNumber = token.toInt( &ok );
            if ( !ok )
                return;
        }
        else if ( token.startsWith( "C1" ) )
        {
            rePos.enabled = true;
            rePos.normalizedX = token.section( ':', 1, 1 ).toDouble();
            rePos.normalizedY = token.section( ':', 2, 2 ).toDouble();
            rePos.pos = Center;
        }
        else if ( token.startsWith( "C2" ) )
        {
            rePos.enabled = true;
            rePos.normalizedX = token.section( ':', 1, 1 ).toDouble();
            rePos.normalizedY = token.section( ':', 2, 2 ).toDouble();
            if (token.section( ':', 3, 3 ).toInt() == 1) rePos.pos = Center;
            else rePos.pos = TopLeft;
        }
        else if ( token.startsWith( "AF1" ) )
        {
            autoFit.enabled = true;
            autoFit.width = token.section( ':', 1, 1 ) == "T";
            autoFit.height = token.section( ':', 2, 2 ) == "T";
        }
        // proceed tokenizing string
        field++;
        token = xmlDesc.section( ';', field, field );
    }
}

QString DocumentViewport::toString() const
{
    // start string with page number
    QString s = QString::number( pageNumber );
    // if has center coordinates, save them on string
    if ( rePos.enabled )
        s += QString( ";C2:" ) + QString::number( rePos.normalizedX ) +
             ':' + QString::number( rePos.normalizedY ) +
             ':' + QString::number( rePos.pos );
    // if has autofit enabled, save its state on string
    if ( autoFit.enabled )
        s += QString( ";AF1:" ) + (autoFit.width ? "T" : "F") +
             ':' + (autoFit.height ? "T" : "F");
    return s;
}

bool DocumentViewport::operator==( const DocumentViewport & vp ) const
{
    bool equal = ( pageNumber == vp.pageNumber ) &&
                 ( rePos.enabled == vp.rePos.enabled ) &&
                 ( autoFit.enabled == vp.autoFit.enabled );
    if ( !equal )
        return false;
    if ( rePos.enabled &&
         (( rePos.normalizedX != vp.rePos.normalizedX) ||
         ( rePos.normalizedY != vp.rePos.normalizedY ) || rePos.pos != vp.rePos.pos) )
        return false;
    if ( autoFit.enabled &&
         (( autoFit.width != vp.autoFit.width ) ||
         ( autoFit.height != vp.autoFit.height )) )
        return false;
    return true;
}


/** DocumentInfo **/

DocumentInfo::DocumentInfo()
  : QDomDocument( "DocumentInformation" )
{
    QDomElement docElement = createElement( "DocumentInfo" );
    appendChild( docElement );
}

void DocumentInfo::set( const QString &key, const QString &value,
                        const QString &title )
{
    QDomElement docElement = documentElement();
    QDomElement element;

    // check whether key already exists
    QDomNodeList list = docElement.elementsByTagName( key );
    if ( list.count() > 0 )
        element = list.item( 0 ).toElement();
    else
        element = createElement( key );

    element.setAttribute( "value", value );
    element.setAttribute( "title", title );

    if ( list.count() == 0 )
        docElement.appendChild( element );
}

QString DocumentInfo::get( const QString &key ) const
{
    QDomEleme