generator_pdf.cpp

okular

    docLock.lock();
    QList<Poppler::FontInfo> fonts = pdfdoc->fonts();
    docLock.unlock();

    const QString fontTypeNames[8] = {
        i18n("unknown"),
        i18n("Type 1"),
        i18n("Type 1C"),
        i18n("Type 3"),
        i18n("TrueType"),
        i18n("CID Type 0"),
        i18n("CID Type 0C"),
        i18n("CID TrueType")
    };
    
    foreach (const Poppler::FontInfo &font, fonts)
    {
        // 0. add font element
        QDomElement fontElem = docFonts.createElement( "font" );
        docFonts.firstChild().appendChild( fontElem );

        // 1. set Name
        const QString &name = font.name();
        fontElem.setAttribute( "Name", name.isNull() ? i18n("[none]") : name );

        // 2. set Type
        fontElem.setAttribute( "Type", fontTypeNames[ font.type() ] );

        // 3. set Embedded
        fontElem.setAttribute( "Embedded", font.isEmbedded() ? i18n("Yes") : i18n("No") );

        // 4. set Path
        fontElem.setAttribute( "File", font.file() );
    }

    return &docFonts;
}

const QList<EmbeddedFile*> *PDFGenerator::embeddedFiles()
{
    if (docEmbeddedFilesDirty)
    {
        docLock.lock();
        const QList<Poppler::EmbeddedFile*> &popplerFiles = pdfdoc->embeddedFiles();
        foreach(Poppler::EmbeddedFile* pef, popplerFiles)
        {
            docEmbeddedFiles.append(new PDFEmbeddedFile(pef));
        }
        docLock.unlock();
        
        docEmbeddedFilesDirty = false;
    }
    
    return &docEmbeddedFiles;
}

bool PDFGenerator::isAllowed( int permissions )
{
#if !OKULAR_FORCE_DRM
    if (KAuthorized::authorize("skip_drm") && !KpdfSettings::obeyDRM()) return true;
#endif

    bool b = true;
    if (permissions & KPDFDocument::AllowModify) b = b && pdfdoc->okToChange();
    if (permissions & KPDFDocument::AllowCopy) b = b && pdfdoc->okToCopy();
    if (permissions & KPDFDocument::AllowPrint) b = b && pdfdoc->okToPrint();
    if (permissions & KPDFDocument::AllowNotes) b = b && pdfdoc->okToAddNotes();
    return b;
}

bool PDFGenerator::canGeneratePixmap( bool /* async */)
{
    return ready;
}

void PDFGenerator::generatePixmap( PixmapRequest * request )
{
#ifndef NDEBUG
    if ( !ready )
        kDebug() << "calling generatePixmap() when not in READY state!" << endl;
#endif
    // update busy state (not really needed here, because the flag needs to
    // be set only to prevent asking a pixmap while the thread is running)
    ready = false;

    // debug requests to this (xpdf) generator
    //kDebug() << "id: " << request->id << " is requesting " << (request->async ? "ASYNC" : "sync") <<  " pixmap for page " << request->page->number() << " [" << request->width << " x " << request->height << "]." << endl;

    /** asynchronous requests (generation in PDFPixmapGeneratorThread::run() **/
    if ( request->async )
    {
        // start the generation into the thread
        generatorThread->startGeneration( request );
        return;
    }

    /** synchronous request: in-place generation **/
    // compute dpi used to get an image with desired width and height
    KPDFPage * page = request->page;
    double fakeDpiX = request->width * 72.0 / page->width(),
           fakeDpiY = request->height * 72.0 / page->height();

    // setup kpdf output device: text page is generated only if we are at 72dpi.
    // since we can pre-generate the TextPage at the right res.. why not?
    bool genTextPage = !page->hasSearchPage() && (request->width == page->width()) &&
                       (request->height == page->height());
    // generate links and image rects if rendering pages on pageview
    bool genObjectRects = request->id & (PAGEVIEW_ID | PRESENTATION_ID);

    // 0. LOCK [waits for the thread end]
    docLock.lock();

    // 1. Set OutputDev parameters and Generate contents
    // note: thread safety is set on 'false' for the GUI (this) thread
    Poppler::Page *p = pdfdoc->page(page->number());

    // 2. Take data from outputdev and attach it to the Page
    page->setPixmap( request->id, p->splashRenderToPixmap(fakeDpiX, fakeDpiY, -1, -1, -1, -1, genObjectRects, (Poppler::Page::Rotation)m_document->rotation()) );
    
    if ( genObjectRects )
    {
    	// TODO previously we extracted Image type rects too, but that needed porting to poppler
        // and as we are not doing anything with Image type rects i did not port it, have a look at
        // dead gp_outputdev.cpp on image extraction
        page->setObjectRects( generateKPDFLinks(p->links(), request->width, request->height, pdfdoc) );
    }

    // 3. UNLOCK [re-enables shared access]
    docLock.unlock();
    if ( genTextPage )
    {
        QList<Poppler::TextBox*> textList = p->textList((Poppler::Page::Rotation)m_document->rotation());
        page->setSearchPage( abstractTextPage(textList, page->height(), page->width(), page->orientation()) );
        qDeleteAll(textList);
    }
    delete p;
    
    // update ready state
    ready = true;

    // notify the new generation
    signalRequestDone( request );
}

bool PDFGenerator::canGenerateTextPage()
{
    return true;
}

void PDFGenerator::generateSyncTextPage( KPDFPage * page )
{
// TODO i think this is wrong because we need the "optative rotation", not the original rotation, but AFAIK it's never called
    kDebug() << "calling generateSyncTextPage( KPDFPage * page )" << endl;
    // build a TextList...
    Poppler::Page *pp = pdfdoc->page( page->number() );
    docLock.lock();
    QList<Poppler::TextBox*> textList = pp->textList((Poppler::Page::Rotation)m_document->rotation());
    docLock.unlock();
    delete pp;
    // ..and attach it to the page
    page->setSearchPage( abstractTextPage(textList, page->height(), page->width(), page->orientation()) );
    qDeleteAll(textList);
}

bool PDFGenerator::print( KPrinter& printer )
{
    int width, height;
    QString ps = printer.option("PageSize");
    if (ps.indexOf(QRegExp("w\\d+h\\d+")) == 0)
    {
        // size not supported by Qt, KPrinter gives us the size as wWIDTHhHEIGHT
        // remove the w
        ps = ps.mid(1);
        int hPos = ps.indexOf("h");
        width = ps.left(hPos).toInt();
        height = ps.mid(hPos+1).toInt();
    }
    else
    {
        // size is supported by Qt, we get either the pageSize name or nothing because the default pageSize is used
        QPrinter dummy(QPrinter::PrinterResolution);
        dummy.setFullPage(true);
        dummy.setPageSize((QPrinter::PageSize)(ps.isEmpty() ? KGlobal::locale()->pageSize() : pageNameToPageSize(ps)));

        width = dummy.width();
        height = dummy.height();
    }

    KTempFile tf( QString::null, ".ps" );

    QList<int> pageList;
    if (!printer.previewOnly()) pageList = printer.pageList();
    else for(int i = 1; i <= pdfdoc->numPages(); i++) pageList.push_back(i);
    
    docLock.lock();
    // TODO rotation
    if (pdfdoc->print(tf.name(), pageList, 72, 72, 0, width, height))
    {
        docLock.unlock();
        printer.printFiles(QStringList(tf.name()), true);
        return true;
    }
    else
    {
        docLock.unlock();
        return false;
    }
	return false;
}

QString PDFGenerator::getMetaData( const QString & key, const QString & option )
{
    if ( key == "StartFullScreen" )
    {
        // asking for the 'start in fullscreen mode' (pdf property)
        if ( pdfdoc->pageMode() == Poppler::Document::FullScreen )
            return "yes";
    }
    else if ( key == "NamedViewport" && !option.isEmpty() )
    {
        // asking for the page related to a 'named link destination'. the
        // option is the link name. @see addSynopsisChildren.
        DocumentViewport viewport;
        docLock.lock();
        Poppler::LinkDestination *ld = pdfdoc->linkDestination( option );
        docLock.unlock();
        if ( ld )
        {
            fillViewportFromLinkDestination( viewport, *ld, pdfdoc );
        }
        delete ld;
        if ( viewport.pageNumber >= 0 )
            return viewport.toString();
    }
    else if ( key == "DocumentTitle" )
    {
        docLock.lock();
        QString title = pdfdoc->info( "Title" );
        docLock.unlock();
        return title;
    }
    return QString();
}

bool PDFGenerator::reparseConfig()
{
    // load paper color from Settings or use the white default color
    QColor color = ( (KpdfSettings::renderMode() == KpdfSettings::EnumRenderMode::Paper ) &&
                     KpdfSettings::changeColors() ) ? KpdfSettings::paperColor() : Qt::white;
    // if paper color is changed we have to rebuild every visible pixmap in addition
    // to the outputDevice. it's the 'heaviest' case, other effect are just recoloring
    // over the page rendered on 'standard' white background.
    if ( pdfdoc && color != pdfdoc->paperColor() )
    {
        docLock.lock();
        pdfdoc->setPaperColor(color);
        docLock.unlock();
        return true;
    }
    return false;
}

bool PDFGenerator::exportToText( const QString & fileName )
{
    QFile f( fileName );
    if ( !f.open( QIODevice::WriteOnly ) )
        return false;

    QTextStream ts( &f );
    int num = m_document->pages();
    for ( int i = 0; i < num; ++i )
    {
        docLock.lock();
        Poppler::Page *pp = pdfdoc->page(i);
        QString text = pp->text(QRect());
        docLock.unlock();
        ts << text;
        delete pp;
    }
    f.close();

    return true;
}

//END Generator inherited functions

inline void append (KPDFTextPage* ktp,
    QString s, double l, double b, double r, double t)
{
//       kWarning() << "text: " << s << " at (" << l << "," << t << ")x(" << r <<","<<b<<")" << endl;
                ktp->append( s ,
                    new NormalizedRect(
                    l,
                    t,
                    r,
                    b
                    ));
}

KPDFTextPage * PDFGenerator::abstractTextPage(const QList<Poppler::TextBox*> &text, double height, double width,int rot)
{    
    KPDFTextPage* ktp=new KPDFTextPage;
    Poppler::TextBox *next; 
    kWarning() << "getting text page in generator pdf - rotation: " << rot << endl;
    int charCount=0;
    int j;
    QString s;
    NormalizedRect * wordRect = new NormalizedRect;
    
    rot = (rot + m_document->rotation()) % 4;
    
    foreach (Poppler::TextBox *word, text)
    {
        wordRect->left = word->boundingBox().left();
        wordRect->bottom = word->boundingBox().bottom();
        wordRect->right = word->boundingBox().right();
        wordRect->top = word->boundingBox().top();
        charCount=word->text().length();
        next=word->nextWord();
        switch (rot)
        {
            case 0:
            // 0 degrees, normal word boundaries are top and bottom
            // only x boundaries change the order of letters is normal not reversed
            for (j = 0; j < charCount; j++)
            {
                s = word->text().at(j);
                append(ktp, (j==charCount-1 && !next ) ? (s + '\n') : s,
                    // this letters boundary
                    word->edge(j)/width,
                    wordRect->bottom/height,
                    // next letters boundary
                    word->edge(j+1)/width,
                    wordRect->top/height);
            }
            
            if ( word->hasSpaceAfter() && next )
              append(ktp, " ",
                    // this letters boundary
                     word->edge(charCount)/width,
                     wordRect->bottom/height,
                    // next letters boundary
                     next->edge(0)/width,
                     wordRect->top/height);
            break;

            case 1:
            // 90 degrees, x boundaries not changed
            // y ones change, the order of letters is normal not reversed
            for (j=0;j<charCount;j++)
            {
                s=word->text().at(j);
                append(ktp, (j==charCount-1 && !next ) ? (s + '\n') : s,
                    wordRect->left/width,
                    word->edge(j)/height,
                    wordRect->right/width,
                    word->edge(j+1)/height);
            }
            
            if ( word->hasSpaceAfter() && next )
              append(ktp, " ",
                    // this letters boundary
                     wordRect->left/width,
                     word->edge(charCount)/height,
                    // next letters boundary
                     wordRect->right/width,
                     next->edge(0)/height);
            break;

            case 2:
            // same as case 0 but reversed order of letters
            for (j=0;j<charCount;j++)
            {
                s=word->text().at(j);
                append(ktp, (j==charCount-1 && !next ) ? (s + '\n') : s,
                    word->edge(j+1)/width,
                    wordRect->bottom/height,
                    word->edge(j)/width,
                    wordRect->top/height);

            }
            
            if ( word->hasSpaceAfter() && next )
              append(ktp, " ",
                    // this letters boundary
                     next->edge(0)/width,
                     wordRect->bottom/height,
                    // next letters boundary
                     word->edge(charCount)/width,
                     wordRect->top/height);
           
            break;

            case 3:
            for (j=0;j<charCount;j++)
            {
                s=word->text().at(j);
                append(ktp, (j==charCount-1 && !next ) ? (s + '\n') : s,
                    wordRect->left/width,
                    word->edge(j+1)/height,