dvirenderer_draw.cpp

okular

// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; c-brace-offset: 0; -*-
/*
 * Copyright (c) 1994 Paul Vojta.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * NOTE:
 *        xdvi is based on prior work as noted in the modification history, below.
 */

/*
 * DVI previewer for X.
 *
 * Eric Cooper, CMU, September 1985.
 *
 * Code derived from dvi-imagen.c.
 *
 * Modification history:
 * 1/1986        Modified for X.10        --Bob Scheifler, MIT LCS.
 * 7/1988        Modified for X.11        --Mark Eichin, MIT
 * 12/1988        Added 'R' option, toolkit, magnifying glass
 *                                        --Paul Vojta, UC Berkeley.
 * 2/1989        Added tpic support       --Jeffrey Lee, U of Toronto
 * 4/1989        Modified for System V    --Donald Richardson, Clarkson Univ.
 * 3/1990        Added VMS support        --Scott Allendorf, U of Iowa
 * 7/1990        Added reflection mode    --Michael Pak, Hebrew U of Jerusalem
 * 1/1992        Added greyscale code     --Till Brychcy, Techn. Univ. Muenchen
 *                                          and Lee Hetherington, MIT
 * 4/1994        Added DPS support, bounding box
 *                                        --Ricardo Telichevesky
 *                                          and Luis Miguel Silveira, MIT RLE.
 */

//#define DEBUG_RENDER 0

#include <config.h>

#include "dviRenderer.h"
#include "dvi.h"
#include "dviFile.h"
#include "hyperlink.h"
#include "kvs_debug.h"
#include "psgs.h"
//#include "renderedDviPagePixmap.h"
#include "TeXFont.h"
#include "textBox.h"
#include "xdvi.h"

#include <klocale.h>

#include <QPainter>

extern QPainter *foreGroundPainter;


/** Routine to print characters.  */

void dviRenderer::set_char(unsigned int cmd, unsigned int ch)
{
#ifdef DEBUG_RENDER
  kDebug(kvs::dvi) << "set_char #" << ch << endl;
#endif

  glyph *g;
  if (colorStack.isEmpty())
    g = ((TeXFont *)(currinf.fontp->font))->getGlyph(ch, true, globalColor);
  else
    g = ((TeXFont *)(currinf.fontp->font))->getGlyph(ch, true, colorStack.top());
  if (g == NULL)
    return;

  long dvi_h_sav = currinf.data.dvi_h;

  QImage pix = g->shrunkenCharacter;
  int x = ((int) ((currinf.data.dvi_h) / (shrinkfactor * 65536))) - g->x2;
  int y = currinf.data.pxl_v - g->y2;

  // Draw the character.
  foreGroundPainter->drawImage(x, y, pix);

  // Are we drawing text for a hyperlink? And are hyperlinks
  // enabled?
  if (HTML_href != NULL) {
    // Now set up a rectangle which is checked against every mouse
    // event.
    if (line_boundary_encountered == true) {
      // Set up hyperlink
      Hyperlink dhl;
      dhl.baseline = currinf.data.pxl_v;
      dhl.box.setRect(x, y, pix.width(), pix.height());
      dhl.linkText = *HTML_href;
      currentlyDrawnPage->hyperLinkList.push_back(dhl);
    } else {
      QRect dshunion = currentlyDrawnPage->hyperLinkList[currentlyDrawnPage->hyperLinkList.size()-1].box.unite(QRect(x, y, pix.width(), pix.height())) ;
      currentlyDrawnPage->hyperLinkList[currentlyDrawnPage->hyperLinkList.size()-1].box = dshunion;
    }
  }

  // Are we drawing text for a source hyperlink? And are source
  // hyperlinks enabled?
  // If we are printing source hyperlinks are irrelevant, otherwise we
  // actually got a pointer to a RenderedDviPagePixmap.
  RenderedDviPagePixmap* currentDVIPage = dynamic_cast<RenderedDviPagePixmap*>(currentlyDrawnPage);
  if (source_href != 0 && currentDVIPage) {
    // Now set up a rectangle which is checked against every mouse
    // event.
    if (line_boundary_encountered == true) {
      // Set up source hyperlinks
      Hyperlink dhl;
      dhl.baseline = currinf.data.pxl_v;
      dhl.box.setRect(x, y, pix.width(), pix.height());
      if (source_href != NULL)
        dhl.linkText = *source_href;
      else
        dhl.linkText = "";
      currentDVIPage->sourceHyperLinkList.push_back(dhl);
    } else {
      QRect dshunion = currentDVIPage->sourceHyperLinkList[currentDVIPage->sourceHyperLinkList.size()-1].box.unite(QRect(x, y, pix.width(), pix.height())) ;
      currentDVIPage->sourceHyperLinkList[currentDVIPage->sourceHyperLinkList.size()-1].box = dshunion;
    }
  }

  // Code for DVI -> text functions (e.g. marking of text, full text
  // search, etc.). Set up the currentlyDrawnPage->textBoxList.
  TextBox link;
  link.box.setRect(x, y, pix.width(), pix.height());
  link.text = "";
  currentlyDrawnPage->textBoxList.push_back(link);

  switch(ch) {
  case 0x0b:
    currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "ff";
    break;
  case 0x0c:
    currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "fi";
    break;
  case 0x0d:
    currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "fl";
    break;
  case 0x0e:
    currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "ffi";
    break;
  case 0x0f:
    currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "ffl";
    break;

  case 0x7b:
    currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "-";
    break;
  case 0x7c:
    currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "---";
    break;
  case 0x7d:
    currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "\"";
    break;
  case 0x7e:
    currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "~";
    break;
  case 0x7f:
    currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "@@"; // @@@ check!
    break;

  default:
    if ((ch >= 0x21) && (ch <= 0x7a))
      currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += QChar(ch);
    else
      currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "?";
    break;
  }


  if (cmd == PUT1)
    currinf.data.dvi_h = dvi_h_sav;
  else
    currinf.data.dvi_h += (int)(currinf.fontp->scaled_size_in_DVI_units * dviFile->getCmPerDVIunit() *
                                (1200.0 / 2.54)/16.0 * g->dvi_advance_in_units_of_design_size_by_2e20 + 0.5);

  word_boundary_encountered = false;
  line_boundary_encountered = false;
}

void dviRenderer::set_empty_char(unsigned int, unsigned int)
{
  return;
}

void dviRenderer::set_vf_char(unsigned int cmd, unsigned int ch)
{
#ifdef DEBUG_RENDER
  kDebug(kvs::dvi) << "dviRenderer::set_vf_char( cmd=" << cmd << ", ch=" << ch << " )" << endl;
#endif

  static unsigned char   c;
  macro *m = &currinf.fontp->macrotable[ch];
  if (m->pos == NULL) {
    kError(kvs::dvi) << "Character " << ch << " not defined in font " << currinf.fontp->fontname << endl;
    m->pos = m->end = &c;
    return;
  }

  long dvi_h_sav = currinf.data.dvi_h;

  struct drawinf oldinfo = currinf;
  currinf.data.w         = 0;
  currinf.data.x         = 0;
  currinf.data.y         = 0;
  currinf.data.z         = 0;

  currinf.fonttable         = &(currinf.fontp->vf_table);
  currinf._virtual          = currinf.fontp;
  quint8 *command_ptr_sav  = command_pointer;
  quint8 *end_ptr_sav      = end_pointer;
  command_pointer           = m->pos;
  end_pointer               = m->end;
  draw_part(currinf.fontp->scaled_size_in_DVI_units*(dviFile->getCmPerDVIunit() * 1200.0 / 2.54)/16.0, true);
  command_pointer           = command_ptr_sav;
  end_pointer               = end_ptr_sav;
  currinf = oldinfo;

  if (cmd == PUT1)
    currinf.data.dvi_h = dvi_h_sav;
  else
    currinf.data.dvi_h += (int)(currinf.fontp->scaled_size_in_DVI_units * dviFile->getCmPerDVIunit() *
                                (1200.0 / 2.54)/16.0 * m->dvi_advance_in_units_of_design_size_by_2e20 + 0.5);
}


void dviRenderer::set_no_char(unsigned int cmd, unsigned int ch)
{
#ifdef DEBUG_RENDER
  kDebug(kvs::dvi) << "dviRenderer::set_no_char( cmd=" << cmd << ", ch =" << ch << " )"  << endl;
#endif

  if (currinf._virtual) {
    currinf.fontp = currinf._virtual->first_font;
    if (currinf.fontp != NULL) {
      currinf.set_char_p = currinf.fontp->set_char_p;
      (this->*currinf.set_char_p)(cmd, ch);
      return;
    }
  }

  errorMsg = i18n("The DVI code set a character of an unknown font.");
  return;
}


void dviRenderer::draw_part(double current_dimconv, bool is_vfmacro)
{
#ifdef DEBUG_RENDER
  kDebug(kvs::dvi) << "draw_part" << endl;
#endif

  qint32 RRtmp=0, WWtmp=0, XXtmp=0, YYtmp=0, ZZtmp=0;
  quint8 ch;

  currinf.fontp        = NULL;
  currinf.set_char_p   = &dviRenderer::set_no_char;

  for (;;) {
    ch = readUINT8();
    if (ch <= (unsigned char) (SETCHAR0 + 127)) {
      (this->*currinf.set_char_p)(ch, ch);
    } else
      if (FNTNUM0 <= ch && ch <= (unsigned char) (FNTNUM0 + 63)) {
        currinf.fontp = currinf.fonttable->find(ch - FNTNUM0);
        if (currinf.fontp == NULL) {
          errorMsg = i18n("The DVI code referred to font #%1, which was not previously defined.", ch - FNTNUM0);
          return;
        }
        currinf.set_char_p = currinf.fontp->set_char_p;
      } else {
        qint32 a, b;

        switch (ch) {
        case SET1:
        case PUT1:
          (this->*currinf.set_char_p)(ch, readUINT8());
          break;

        case SETRULE:
          if (is_vfmacro == false) {
            word_boundary_encountered = true;
            line_boundary_encountered = true;
          }
          /* Be careful, dvicopy outputs rules with height =
             0x80000000. We don't want any SIGFPE here. */
          a = readUINT32();
          b = readUINT32();
          b = ((long) (b *  current_dimconv));
          if (a > 0 && b > 0) {
            int h = ((int) ROUNDUP(((long) (a *  current_dimconv)), shrinkfactor * 65536));
            int w =  ((int) ROUNDUP(b, shrinkfactor * 65536));

            if (colorStack.isEmpty())
              foreGroundPainter->fillRect( ((int) ((currinf.data.dvi_h) / (shrinkfactor * 65536))),
                                         currinf.data.pxl_v - h + 1, w?w:1, h?h:1, globalColor );
            else
              foreGroundPainter->fillRect( ((int) ((currinf.data.dvi_h) / (shrinkfactor * 65536))),
                                        currinf.data.pxl_v - h + 1, w?w:1, h?h:1, colorStack.top() );
          }
          currinf.data.dvi_h += b;
          break;

        case PUTRULE:
          if (is_vfmacro == false) {
            word_boundary_encountered = true;
            line_boundary_encountered = true;
          }
          a = readUINT32();
          b = readUINT32();