special.cpp.svn-base

okular

  parse_special_argument(include_command, "rwi=", &rwi);
  parse_special_argument(include_command, "rhi=", &rhi);
  parse_special_argument(include_command, "angle=", &angle);

  // If we have a png, gif, jpeg or mng file, we need to draw it here.
  KMimeType::Ptr const mime_type = KMimeType::findByFileContent(EPSfilename);
  QString const & mime_type_name = mime_type?mime_type->name():"";
  bool const isGFX = (mime_type_name == "image/png" ||
                      mime_type_name == "image/gif" ||
                      mime_type_name == "image/jpeg" ||
                      mime_type_name == "video/x-mng");

  // So, if we do not have a PostScript file, but a graphics file, and
  // if that file exists, we draw it here.
  if (isGFX && QFile::exists(EPSfilename)) {
    // Don't show PostScript, just draw the bounding box. For this,
    // calculate the size of the bounding box in Pixels.
    double bbox_width  = urx - llx;
    double bbox_height = ury - lly;

    if ((rwi != 0)&&(bbox_width != 0)) {
      bbox_height *= rwi/bbox_width;
      bbox_width  = rwi;
    }
    if ((rhi != 0)&&(bbox_height != 0)) {
      bbox_width  *= rhi/bbox_height;
      bbox_height = rhi;
    }

    double fontPixelPerDVIunit = dviFile->getCmPerDVIunit() * 1200.0/2.54;

    bbox_width  *= 0.1 * 65536.0*fontPixelPerDVIunit / shrinkfactor;
    bbox_height *= 0.1 * 65536.0*fontPixelPerDVIunit / shrinkfactor;

    QImage image(EPSfilename);
    image = image.scaled((int)(bbox_width), (int)(bbox_height), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
    foreGroundPainter->drawImage( ((int) ((currinf.data.dvi_h) / (shrinkfactor * 65536))), currinf.data.pxl_v - (int)bbox_height, image);
    return;
  }

  if (!_postscript || !QFile::exists(EPSfilename)) {
    // Don't show PostScript, just draw the bounding box. For this,
    // calculate the size of the bounding box in Pixels.
    double bbox_width  = urx - llx;
    double bbox_height = ury - lly;

    if ((rwi != 0)&&(bbox_width != 0)) {
      bbox_height *= rwi/bbox_width;
      bbox_width  = rwi;
    }
    if ((rhi != 0)&&(bbox_height != 0)) {
      bbox_width  *= rhi/bbox_height;
      bbox_height = rhi;
    }

    double fontPixelPerDVIunit = dviFile->getCmPerDVIunit() * 1200.0/2.54;

    bbox_width  *= 0.1 * 65536.0*fontPixelPerDVIunit / shrinkfactor;
    bbox_height *= 0.1 * 65536.0*fontPixelPerDVIunit / shrinkfactor;

    QRect bbox(((int) ((currinf.data.dvi_h) / (shrinkfactor * 65536))), currinf.data.pxl_v - (int)bbox_height,
               (int)bbox_width, (int)bbox_height);

    foreGroundPainter->save();

    if (QFile::exists(EPSfilename))
      foreGroundPainter->setBrush(Qt::lightGray);
    else
      foreGroundPainter->setBrush(Qt::red);
    foreGroundPainter->setPen(Qt::black);
    foreGroundPainter->drawRoundRect(bbox, 2, 2);
    QFont f = foreGroundPainter->font();
    f.setPointSize(8);
    foreGroundPainter->setFont(f);
    if (QFile::exists(EPSfilename))
      foreGroundPainter->drawText (bbox, (int)(Qt::AlignCenter), EPSfilename);
    else
      foreGroundPainter->drawText (bbox, (int)(Qt::AlignCenter),
                                i18n("File not found: \n %1", EPSfilename_orig));
    foreGroundPainter->restore();
  }

  return;
}


void dviRenderer::TPIC_flushPath_special()
{
#ifdef DEBUG_SPECIAL
  kDebug(kvs::dvi) << "TPIC special flushPath" << endl;
#endif

  if (number_of_elements_in_path == 0) {
    printErrorMsgForSpecials("TPIC special flushPath called when path was empty.");
    return;
  }

  QPen pen(Qt::black, (int)(penWidth_in_mInch*resolutionInDPI/1000.0 + 0.5));  // Sets the pen size in milli-inches
  foreGroundPainter->setPen(pen);
  foreGroundPainter->drawPolyline(TPIC_path.constData(), number_of_elements_in_path);
  number_of_elements_in_path = 0;
}


void dviRenderer::TPIC_addPath_special(const QString& cp)
{
#ifdef DEBUG_SPECIAL
  kDebug(kvs::dvi) << "TPIC special addPath: " << cp << endl;
#endif

  // Adds a point to the path list
  QString cp_noWhiteSpace = cp.trimmed();
  bool ok;
  float xKoord = cp_noWhiteSpace.section(' ', 0, 0).toFloat(&ok);
  if (ok == false) {
    printErrorMsgForSpecials( QString("TPIC special; cannot parse first argument in 'pn %1'.").arg(cp) );
    return;
  }
  float yKoord = cp_noWhiteSpace.section(' ', 1, 1).toFloat(&ok);
  if (ok == false) {
    printErrorMsgForSpecials( QString("TPIC special; cannot parse second argument in 'pn %1'.").arg(cp) );
    return;
  }

  float mag = dviFile->getMagnification()/1000.0;

  int x = (int)( currinf.data.dvi_h/(shrinkfactor*65536.0) + mag*xKoord*resolutionInDPI/1000.0 + 0.5 );
  int y = (int)( currinf.data.pxl_v + mag*yKoord*resolutionInDPI/1000.0 + 0.5 );

  // Initialize the point array used to store the path
  if (TPIC_path.size() == 0)
    number_of_elements_in_path = 0;
  if (TPIC_path.size() == number_of_elements_in_path)
    TPIC_path.resize(number_of_elements_in_path+100);
  TPIC_path.setPoint(number_of_elements_in_path++, x, y);
}


void dviRenderer::TPIC_setPen_special(const QString& cp)
{
#ifdef DEBUG_SPECIAL
  kDebug(kvs::dvi) << "TPIC special setPen: " << cp << endl;
#endif

  // Sets the pen size in milli-inches
  bool ok;
  penWidth_in_mInch = cp.trimmed().toFloat(&ok);
  if (ok == false) {
    printErrorMsgForSpecials( QString("TPIC special; cannot parse argument in 'pn %1'.").arg(cp) );
    penWidth_in_mInch = 0.0;
    return;
  }
}


void dviRenderer::applicationDoSpecial(char *cp)
{
  QString special_command(cp);

  // First come specials which is only interpreted during rendering,
  // and NOT during the prescan phase

  // font color specials
  if (strncasecmp(cp, "color", 5) == 0) {
    color_special(special_command.mid(5));
    return;
  }

  // HTML reference
  if (strncasecmp(cp, "html:<A href=", 13) == 0) {
    html_href_special(special_command.mid(14));
    return;
  }

  // HTML anchor end
  if (strncasecmp(cp, "html:</A>", 9) == 0) {
    html_anchor_end();
    return;
  }

  // TPIC specials
  if (strncasecmp(cp, "pn", 2) == 0) {
    TPIC_setPen_special(special_command.mid(2));
    return;
  }
  if (strncasecmp(cp, "pa ", 3) == 0) {
    TPIC_addPath_special(special_command.mid(3));
    return;
  }
  if (strncasecmp(cp, "fp", 2) == 0) {
    TPIC_flushPath_special();
    return;
  }

  // Encapsulated Postscript File
  if (strncasecmp(cp, "PSfile=", 7) == 0) {
    epsf_special(special_command.mid(7));
    return;
  }

  // source special
  if (strncasecmp(cp, "src:", 4) == 0) {
    source_special(special_command.mid(4));
    return;
  }

  // Unfortunately, in some TeX distribution the hyperref package uses
  // the dvips driver by default, rather than the hypertex driver. As
  // a result, the DVI files produced are full of PostScript that
  // specifies links and anchors, and KDVI would call the ghostscript
  // interpreter for every page which makes it really slow. This is a
  // major nuisance, so that we try to filter and interpret the
  // hypertex generated PostScript here.
  if (special_command.startsWith("ps:SDict begin")) {

    // Hyperref: start of hyperref rectangle. At this stage it is not
    // yet clear if the rectangle will conain a hyperlink, an anchor,
    // or another type of object. We suspect that this rectangle will
    // define a hyperlink, allocate a QString and set HTML_href to
    // point to this string. The string contains the name of the
    // destination which ---due to the nature of the PostScript
    // language--- will be defined only after characters are drawn and
    // the hyperref rectangle has been closed. We use "glopglyph" as a
    // temporary name. Since the pointer HTML_href is not NULL, the
    // chracter drawing routines will now underline all characters in
    // blue to point out that they correspond to a hyperlink. Also, as
    // soon as characters are drawn, the drawing routines will
    // allocate a Hyperlink and add it to the top of the vector
    // currentlyDrawnPage->hyperLinkList.
    if (special_command == "ps:SDict begin H.S end") {
      // At this stage, the vector 'hyperLinkList' should not contain
      // links with unspecified destinations (i.e. destination set to
      // 'glopglyph'). As a protection against bad DVI files, we make
      // sure to remove all link rectangles which point to
      // 'glopglyph'.
      while (!currentlyDrawnPage->hyperLinkList.isEmpty())
        if (currentlyDrawnPage->hyperLinkList.last().linkText == "glopglyph")
          currentlyDrawnPage->hyperLinkList.pop_back();
        else
          break;

      HTML_href = new QString("glopglyph");
      return;
    }

    // Hyperref: end of hyperref rectangle of unknown type or hyperref
    // link rectangle. In these cases we set HTML_href to NULL, which
    // causes the character drawing routines to stop drawing
    // characters underlined in blue. Note that the name of the
    // destination is still set to "glopglyph". In a well-formed DVI
    // file, this special command is immediately followed by another
    // special, where the destination is specified. This special is
    // treated below.
    if ((special_command == "ps:SDict begin H.R end") || special_command.endsWith("H.L end")) {
      if (HTML_href != NULL) {
        delete HTML_href;
        HTML_href = NULL;
      }
      return; // end of hyperref rectangle
    }

    // Hyperref: end of anchor rectangle. If this special is
    // encountered, the rectangle, which was started with "ps:SDict
    // begin H.S end" does not contain a link, but an anchor for a
    // link. Anchors, however, have already been dealt with in the
    // prescan phase and will not be considered here. Thus, we set
    // HTML_href to NULL so that character drawing routines will no
    // longer underline hyperlinks in blue, and remove the link from
    // the hyperLinkList. NOTE: in a well-formed DVI file, the "H.A"
    // special comes directly after the "H.S" special. A
    // hyperlink-anchor rectangle therefore never contains characters,
    // so no character will by accidentally underlined in blue.
    if (special_command.endsWith("H.A end")) {
      if (HTML_href != NULL) {
        delete HTML_href;
        HTML_href = NULL;
      }
      while (!currentlyDrawnPage->hyperLinkList.isEmpty())
        if (currentlyDrawnPage->hyperLinkList.last().linkText == "glopglyph")
          currentlyDrawnPage->hyperLinkList.pop_back();
        else
          break;
      return; // end of hyperref anchor
    }

    // Hyperref: specification of a hyperref link rectangle's
    // destination. As mentioned above, the destination of a hyperlink
    // is specified only AFTER the rectangle has been specified. We
    // will therefore go through the list of rectangles stored in
    // currentlyDrawnPage->hyperLinkList, find those whose destination
    // is open and fill in the value found here. NOTE: the character
    // drawing routines sometimes split a single hyperlink rectangle
    // into several rectangles (e.g. if the font changes, or when a
    // line break is encountered)
    if (special_command.startsWith("ps:SDict begin [") && special_command.endsWith(" pdfmark end")) {
      if (!currentlyDrawnPage->hyperLinkList.isEmpty()) {
        QString targetName = special_command.section('(', 1, 1).section(')', 0, 0);
        QVector<Hyperlink>::iterator it;
        for( it = currentlyDrawnPage->hyperLinkList.begin(); it != currentlyDrawnPage->hyperLinkList.end(); ++it )
          if (it->linkText == "glopglyph")
            it->linkText = targetName;
      }
      return; // hyperref definition of link/anchor/bookmark/etc
    }
  }

  // Detect text rotation specials that are included by the graphicx
  // package. If one of these specials is found, the state of the
  // painter is saved, and the coordinate system is rotated
  // accordingly
  if (special_command.startsWith("ps: gsave currentpoint currentpoint translate ") &&
      special_command.endsWith(" neg rotate neg exch neg exch translate") ) {
    bool ok;
    double angle = special_command.section(' ', 5, 5).toDouble(&ok);
    if (ok == true) {
      int x = ((int) ((currinf.data.dvi_h) / (shrinkfactor * 65536)));
      int y = currinf.data.pxl_v;

      foreGroundPainter->save();
      // Rotate about the current point
      foreGroundPainter->translate(x,y);
      foreGroundPainter->rotate(-angle);
      foreGroundPainter->translate(-x,-y);
    } else
      printErrorMsgForSpecials( i18n("Error in DVIfile '%1', page %2. Could not interpret angle in text rotation special." , 
                                dviFile->filename, current_page));
  }

  // The graphicx package marks the end of rotated text with this
  // special. The state of the painter is restored.
  if (special_command == "ps: currentpoint grestore moveto") {
    foreGroundPainter->restore();
  }

  // The following special commands are not used here; they are of
  // interest only during the prescan phase. We recognize them here
  // anyway, to make sure that KDVI doesn't complain about
  // unrecognized special commands.
  if ((cp[0] == '!') ||
      (cp[0] == '"') ||
      (strncasecmp(cp, "html:<A name=", 13) == 0) ||
      (strncasecmp(cp, "ps:", 3) == 0) ||
      (strncasecmp(cp, "papersize", 9) == 0) ||
      (strncasecmp(cp, "header", 6) == 0) ||
      (strncasecmp(cp, "background", 10) == 0) )
    return;

  printErrorMsgForSpecials(i18n("The special command '%1' is not implemented.", special_command));
  return;
}