document.cpp.svn-base

okular

{
    // check if searchID is present in runningSearches
    if ( !d->searches.contains( searchID ) )
        return;

    // get previous parameters for search
    RunningSearch * s = d->searches[ searchID ];

    // unhighlight pages and inform observers about that
    QLinkedList< int >::iterator it = s->highlightedPages.begin(), end = s->highlightedPages.end();
    for ( ; it != end; ++it )
    {
        int pageNumber = *it;
        pages_vector[ pageNumber ]->deleteHighlights( searchID );
        foreachObserver( notifyPageChanged( pageNumber, DocumentObserver::Highlights ) );
    }

    // send the setup signal too (to update views that filter on matches)
    foreachObserver( notifySetup( pages_vector, false ) );

    // remove serch from the runningSearches list and delete it
    d->searches.remove( searchID );
    delete s;
}

bool KPDFDocument::continueLastSearch()
{
    return continueSearch( d->m_lastSearchID );
}


void KPDFDocument::toggleBookmark( int n )
{
    KPDFPage * page = ( n < (int)pages_vector.count() ) ? pages_vector[ n ] : 0;
    if ( page )
    {
        page->setBookmark( !page->hasBookmark() );
        foreachObserver( notifyPageChanged( n, DocumentObserver::Bookmark ) );
    }
}

void KPDFDocument::processLink( const KPDFLink * link )
{
    if ( !link )
        return;

    switch( link->linkType() )
    {
        case KPDFLink::Goto: {
            const KPDFLinkGoto * go = static_cast< const KPDFLinkGoto * >( link );
            d->nextDocumentViewport = go->destViewport();

            // Explanation of why d->nextDocumentViewport is needed:
            // all openRelativeFile does is launch a signal telling we
            // want to open another URL, the problem is that when the file is 
            // non local, the loading is done assynchronously so you can't
            // do a setViewport after the if as it was because you are doing the setViewport
            // on the old file and when the new arrives there is no setViewport for it and
            // it does not show anything

            // first open filename if link is pointing outside this document
            if ( go->isExternal() && !openRelativeFile( go->fileName() ) )
            {
                kWarning() << "Link: Error opening '" << go->fileName() << "'." << endl;
                return;
            }
            else
            {
                // skip local links that point to nowhere (broken ones)
                if (d->nextDocumentViewport.pageNumber == -1)
                    return;

                setViewport( d->nextDocumentViewport, -1, true );
                d->nextDocumentViewport = DocumentViewport();
            }

            } break;

        case KPDFLink::Execute: {
            const KPDFLinkExecute * exe  = static_cast< const KPDFLinkExecute * >( link );
            QString fileName = exe->fileName();
            if ( fileName.endsWith( ".pdf" ) || fileName.endsWith( ".PDF" ) )
            {
                openRelativeFile( fileName );
                return;
            }

            // Albert: the only pdf i have that has that kind of link don't define
            // an application and use the fileName as the file to open
            fileName = giveAbsolutePath( fileName );
            KMimeType::Ptr mime = KMimeType::findByPath( fileName );
            // Check executables
            if ( KRun::isExecutableFile( fileName, mime->name() ) )
            {
                // Don't have any pdf that uses this code path, just a guess on how it should work
                if ( !exe->parameters().isEmpty() )
                {
                    fileName = giveAbsolutePath( exe->parameters() );
                    mime = KMimeType::findByPath( fileName );
                    if ( KRun::isExecutableFile( fileName, mime->name() ) )
                    {
                        // this case is a link pointing to an executable with a parameter
                        // that also is an executable, possibly a hand-crafted pdf
                        KMessageBox::information( 0, i18n("The pdf file is trying to execute an external application and for your safety okular does not allow that.") );
                        return;
                    }
                }
                else
                {
                    // this case is a link pointing to an executable with no parameters
                    // core developers find unacceptable executing it even after asking the user
                    KMessageBox::information( 0, i18n("The pdf file is trying to execute an external application and for your safety okular does not allow that.") );
                    return;
                }
            }

            KService::Ptr ptr = KMimeTypeTrader::self()->preferredService( mime->name(), "Application" );
            if ( ptr )
            {
                KUrl::List lst;
                lst.append( fileName );
                KRun::run( *ptr, lst, 0 );
            }
            else
                KMessageBox::information( 0, i18n( "No application found for opening file of mimetype %1.", mime->name() ) );
            } break;

        case KPDFLink::Action: {
            const KPDFLinkAction * action = static_cast< const KPDFLinkAction * >( link );
            switch( action->actionType() )
            {
                case KPDFLinkAction::PageFirst:
                    setViewportPage( 0 );
                    break;
                case KPDFLinkAction::PagePrev:
                    if ( (*d->viewportIterator).pageNumber > 0 )
                        setViewportPage( (*d->viewportIterator).pageNumber - 1 );
                    break;
                case KPDFLinkAction::PageNext:
                    if ( (*d->viewportIterator).pageNumber < (int)pages_vector.count() - 1 )
                        setViewportPage( (*d->viewportIterator).pageNumber + 1 );
                    break;
                case KPDFLinkAction::PageLast:
                    setViewportPage( pages_vector.count() - 1 );
                    break;
                case KPDFLinkAction::HistoryBack:
                    setPrevViewport();
                    break;
                case KPDFLinkAction::HistoryForward:
                    setNextViewport();
                    break;
                case KPDFLinkAction::Quit:
                    emit quit();
                    break;
                case KPDFLinkAction::Presentation:
                    emit linkPresentation();
                    break;
                case KPDFLinkAction::EndPresentation:
                    emit linkEndPresentation();
                    break;
                case KPDFLinkAction::Find:
                    emit linkFind();
                    break;
                case KPDFLinkAction::GoToPage:
                    emit linkGoToPage();
                    break;
                case KPDFLinkAction::Close:
                    emit close();
                    break;
            }
            } break;

        case KPDFLink::Browse: {
            const KPDFLinkBrowse * browse = static_cast< const KPDFLinkBrowse * >( link );
            // if the url is a mailto one, invoke mailer
            if ( browse->url().startsWith( "mailto:", Qt::CaseInsensitive ) )
                KToolInvocation::invokeMailer( browse->url() );
            else
            {
                QString url = browse->url();

                // fix for #100366, documents with relative links that are the form of http:foo.pdf
                if (url.indexOf("http:") == 0 && url.indexOf("http://") == -1 && url.right(4) == ".pdf")
                {
                    openRelativeFile(url.mid(5));
                    return;
                }

                // Albert: this is not a leak! 
                // TODO: find a widget to pass as second parameter
                new KRun( KUrl(url), 0 ); 
            }
            } break;

        case KPDFLink::Movie:
            //const KPDFLinkMovie * browse = static_cast< const KPDFLinkMovie * >( link );
            // TODO this (Movie link)
            break;
    }
}

bool KPDFDocument::print( KPrinter &printer )
{
    return generator ? generator->print( printer ) : false;
}

void KPDFDocument::requestDone( PixmapRequest * req )
{
#ifndef NDEBUG
    if ( !generator->canGeneratePixmap( req->async ) )
        kDebug() << "requestDone with generator not in READY state." << endl;
#endif

    // [MEM] 1.1 find and remove a previous entry for the same page and id
    QLinkedList< AllocatedPixmap * >::iterator aIt = d->allocatedPixmapsFifo.begin();
    QLinkedList< AllocatedPixmap * >::iterator aEnd = d->allocatedPixmapsFifo.end();
    for ( ; aIt != aEnd; ++aIt )
        if ( (*aIt)->page == req->pageNumber && (*aIt)->id == req->id )
        {
            AllocatedPixmap * p = *aIt;
            d->allocatedPixmapsFifo.erase( aIt );
            d->allocatedPixmapsTotalMemory -= p->memory;
            delete p;
            break;
        }

    // [MEM] 1.2 append memory allocation descriptor to the FIFO
    int memoryBytes = 4 * req->width * req->height;
    AllocatedPixmap * memoryPage = new AllocatedPixmap( req->id, req->pageNumber, memoryBytes );
    d->allocatedPixmapsFifo.append( memoryPage );
    d->allocatedPixmapsTotalMemory += memoryBytes;

    // 2. notify an observer that its pixmap changed
    if ( d->observers.contains( req->id ) )
        d->observers[ req->id ]->notifyPageChanged( req->pageNumber, DocumentObserver::Pixmap );

    // 3. delete request
    delete req;

    // 4. start a new generation if some is pending
    if ( !d->pixmapRequestsStack.isEmpty() )
        sendGeneratorRequest();
}

void KPDFDocument::sendGeneratorRequest()
{
    // find a request
    PixmapRequest * request = 0;
    while ( !d->pixmapRequestsStack.isEmpty() && !request )
    {
        PixmapRequest * r = d->pixmapRequestsStack.last();
        if (!r)
        {
            d->pixmapRequestsStack.pop_back();
        }
        // request only if page isn't already present or request has invalid id
        else if ( r->page->hasPixmap( r->id, r->width, r->height ) || r->id <= 0 || r->id >= MAX_OBSERVER_ID)
        {
            d->pixmapRequestsStack.pop_back();
            delete r;
        }
        else if ( (long)r->width * (long)r->height > 20000000L )
        {
            d->pixmapRequestsStack.pop_back();
            if ( !d->warnedOutOfMemory )
            {
                kWarning() << "Running out of memory on page " << r->pageNumber
                    << " (" << r->width << "x" << r->height << " px);" << endl;
                kWarning() << "this message will be reported only once." << endl;
                d->warnedOutOfMemory = true;
            }
	    delete r;
        }
        else
            request = r;
    }

    // if no request found (or already generated), return
    if ( !request )
        return;

    // [MEM] preventive memory freeing
    int pixmapBytes = 4 * request->width * request->height;
    if ( pixmapBytes > (1024 * 1024) )
        cleanupPixmapMemory( pixmapBytes );

    // submit the request to the generator
    if ( generator->canGeneratePixmap( request->async ) )
    {
        kWarning() << "sending request id=" << request->id << " " <<request->width << "x" << request->height << "@" << request->pageNumber << " async == " << request->async << endl;
        d->pixmapRequestsStack.removeAll ( request );
        generator->generatePixmap ( request );
    }
    else
        // pino (7/4/2006): set the polling interval from 10 to 30
        QTimer::singleShot( 30, this, SLOT(sendGeneratorRequest()) );
}

void KPDFDocument::cleanupPixmapMemory( int /*sure? bytesOffset*/ )
{
    // [MEM] choose memory parameters based on configuration profile
    int clipValue = -1;
    int memoryToFree = -1;
    switch ( KpdfSettings::memoryLevel() )
    {
        case KpdfSettings::EnumMemoryLevel::Low:
            memoryToFree = d->allocatedPixmapsTotalMemory;
            break;

        case KpdfSettings::EnumMemoryLevel::Normal:
            memoryToFree = d->allocatedPixmapsTotalMemory - getTotalMemory() / 3;
            clipValue = (d->allocatedPixmapsTotalMemory - getFreeMemory()) / 2;
            break;

        case KpdfSettings::EnumMemoryLevel::Aggressive:
            clipValue = (d->allocatedPixmapsTotalMemory - getFreeMemory()) / 2;
            break;
    }

    if ( clipValue > memoryToFree )
        memoryToFree = clipValue;

    if ( memoryToFree > 0 )
    {
        // [MEM] free memory starting from older pixmaps
        int pagesFreed = 0;
        QLinkedList< AllocatedPixmap * >::iterator pIt = d->allocatedPixmapsFifo.begin();
        QLinkedList< AllocatedPixmap * >::iterator pEnd = d->allocatedPixmapsFifo.end();
        while ( (pIt != pEnd) && (memoryToFree > 0) )
        {
            AllocatedPixmap * p = *pIt;
            if ( d->observers[ p->id ]->canUnloadPixmap( p->page ) )
            {
                // update internal variables
                pIt = d->allocatedPixmapsFifo.erase( pIt );
                d->allocatedPixmapsTotalMemory -= p->memory;
                memoryToFree -= p->memory;
                pagesFreed++;
                // delete pixmap
                pages_vector[ p->page ]->deletePixmap( p->id );
                // delete allocation descriptor
                delete p;
            } else
                ++pIt;
        }
        //p--rintf("freeMemory A:[%d -%d = %d] \n", d->allocatedPixmapsFifo.count() + pagesFreed, pagesFreed, d->allocatedPixmapsFifo.count() );
    }
}

int KPDFDocument::getTotalMemory()
{
    static int cachedValue = 0;
    if ( cachedValue )
        return cachedValue;

#ifdef __linux__
    // if /proc/meminfo doesn't exist, return 128MB
    QFile memFile( "/proc/meminfo" );
    if ( !memFile.open( QIODevice::ReadOnly ) )
        return (cachedValue = 134217728);

    // read /proc/meminfo and sum up the contents of 'MemFree', 'Buffers'
    // and 'Cached' fields. consider swapped memory as used memory.
    QTextStream readStream( &memFile );
    while ( !readStream.atEnd() )
    {
        QString entry = readStream.readLine();
        if ( entry.startsWith( "MemTotal:" ) )
            return (cachedValue = (1024 * entry.section( ' ', -2, -2 ).toInt()));
    }
#endif
    return (cachedValue = 134217728);
}

int KPDFDocument::getFreeMemory()
{
#ifdef __linux__