summaryrefslogtreecommitdiffstats
path: root/kdvi/special.cpp
blob: 23e58441b7bb54008c4e79eb5daad29cb24621a4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727

// special.cpp

// Methods for dviRenderer which deal with "\special" commands found in the
// DVI file

// Copyright 2000--2004, Stefan Kebekus (kebekus@kde.org).

#include <config.h>

#include <kdebug.h>
#include <klocale.h>
#include <kmimetype.h>
#include <kprocio.h>
#include <qdir.h>
#include <qfile.h>
#include <qfileinfo.h>
#include <qimage.h>
#include <qstringlist.h>

#include "dviFile.h"
#include "dviRenderer.h"
#include "hyperlink.h"
#include "kdvi.h"
#include "kdvi_multipage.h"
#include "psgs.h"
#include "xdvi.h"

//#define DEBUG_SPECIAL

extern QPainter *foreGroundPainter;

void dviRenderer::printErrorMsgForSpecials(const QString& msg)
{
  if (dviFile->errorCounter < 25) {
    kdError(4300) << msg << endl;
    dviFile->errorCounter++;
    if (dviFile->errorCounter == 25)
      kdError(4300) << i18n("That makes 25 errors. Further error messages will not be printed.") << endl;
  }
}

// Parses a color specification, as explained in the manual to
// dvips. If the spec could not be parsed, an invalid color will be
// returned.

QColor dviRenderer::parseColorSpecification(const QString& colorSpec)
{
  // Initialize the map of known colors, if that is not done yet.
  if (namedColors.isEmpty()) {
    namedColors["Red"] = QColor( (int)(255.0*1), (int)(255.0*0), (int)(255.0*0));
    namedColors["Tan"] = QColor( (int)(255.0*0.86), (int)(255.0*0.58), (int)(255.0*0.44));
    namedColors["Blue"] = QColor( (int)(255.0*0), (int)(255.0*0), (int)(255.0*1));
    namedColors["Cyan"] = QColor( (int)(255.0*0), (int)(255.0*1), (int)(255.0*1));
    namedColors["Gray"] = QColor( (int)(255.0*0.5), (int)(255.0*0.5), (int)(255.0*0.5));
    namedColors["Plum"] = QColor( (int)(255.0*0.5), (int)(255.0*0), (int)(255.0*1));
    namedColors["Black"] = QColor( (int)(255.0*0), (int)(255.0*0), (int)(255.0*0));
    namedColors["Brown"] = QColor( (int)(255.0*0.4), (int)(255.0*0), (int)(255.0*0));
    namedColors["Green"] = QColor( (int)(255.0*0), (int)(255.0*1), (int)(255.0*0));
    namedColors["Melon"] = QColor( (int)(255.0*1), (int)(255.0*0.54), (int)(255.0*0.5));
    namedColors["Peach"] = QColor( (int)(255.0*1), (int)(255.0*0.5), (int)(255.0*0.3));
    namedColors["Sepia"] = QColor( (int)(255.0*0.3), (int)(255.0*0), (int)(255.0*0));
    namedColors["White"] = QColor( (int)(255.0*1), (int)(255.0*1), (int)(255.0*1));
    namedColors["Maroon"] = QColor( (int)(255.0*0.68), (int)(255.0*0), (int)(255.0*0));
    namedColors["Orange"] = QColor( (int)(255.0*1), (int)(255.0*0.39), (int)(255.0*0.13));
    namedColors["Orchid"] = QColor( (int)(255.0*0.68), (int)(255.0*0.36), (int)(255.0*1));
    namedColors["Purple"] = QColor( (int)(255.0*0.55), (int)(255.0*0.14), (int)(255.0*1));
    namedColors["Salmon"] = QColor( (int)(255.0*1), (int)(255.0*0.47), (int)(255.0*0.62));
    namedColors["Violet"] = QColor( (int)(255.0*0.21), (int)(255.0*0.12), (int)(255.0*1));
    namedColors["Yellow"] = QColor( (int)(255.0*1), (int)(255.0*1), (int)(255.0*0));
    namedColors["Apricot"] = QColor( (int)(255.0*1), (int)(255.0*0.68), (int)(255.0*0.48));
    namedColors["Emerald"] = QColor( (int)(255.0*0), (int)(255.0*1), (int)(255.0*0.5));
    namedColors["Fuchsia"] = QColor( (int)(255.0*0.45), (int)(255.0*0.01), (int)(255.0*0.92));
    namedColors["Magenta"] = QColor( (int)(255.0*1), (int)(255.0*0), (int)(255.0*1));
    namedColors["SkyBlue"] = QColor( (int)(255.0*0.38), (int)(255.0*1), (int)(255.0*0.88));
    namedColors["Thistle"] = QColor( (int)(255.0*0.88), (int)(255.0*0.41), (int)(255.0*1));
    namedColors["BrickRed"] = QColor( (int)(255.0*0.72), (int)(255.0*0), (int)(255.0*0));
    namedColors["Cerulean"] = QColor( (int)(255.0*0.06), (int)(255.0*0.89), (int)(255.0*1));
    namedColors["Lavender"] = QColor( (int)(255.0*1), (int)(255.0*0.52), (int)(255.0*1));
    namedColors["Mahogany"] = QColor( (int)(255.0*0.65), (int)(255.0*0), (int)(255.0*0));
    namedColors["Mulberry"] = QColor( (int)(255.0*0.64), (int)(255.0*0.08), (int)(255.0*0.98));
    namedColors["NavyBlue"] = QColor( (int)(255.0*0.06), (int)(255.0*0.46), (int)(255.0*1));
    namedColors["SeaGreen"] = QColor( (int)(255.0*0.31), (int)(255.0*1), (int)(255.0*0.5));
    namedColors["TealBlue"] = QColor( (int)(255.0*0.12), (int)(255.0*0.98), (int)(255.0*0.64));
    namedColors["BlueGreen"] = QColor( (int)(255.0*0.15), (int)(255.0*1), (int)(255.0*0.67));
    namedColors["CadetBlue"] = QColor( (int)(255.0*0.38), (int)(255.0*0.43), (int)(255.0*0.77));
    namedColors["Dandelion"] = QColor( (int)(255.0*1), (int)(255.0*0.71), (int)(255.0*0.16));
    namedColors["Goldenrod"] = QColor( (int)(255.0*1), (int)(255.0*0.9), (int)(255.0*0.16));
    namedColors["LimeGreen"] = QColor( (int)(255.0*0.5), (int)(255.0*1), (int)(255.0*0));
    namedColors["OrangeRed"] = QColor( (int)(255.0*1), (int)(255.0*0), (int)(255.0*0.5));
    namedColors["PineGreen"] = QColor( (int)(255.0*0), (int)(255.0*0.75), (int)(255.0*0.16));
    namedColors["RawSienna"] = QColor( (int)(255.0*0.55), (int)(255.0*0), (int)(255.0*0));
    namedColors["RedOrange"] = QColor( (int)(255.0*1), (int)(255.0*0.23), (int)(255.0*0.13));
    namedColors["RedViolet"] = QColor( (int)(255.0*0.59), (int)(255.0*0), (int)(255.0*0.66));
    namedColors["Rhodamine"] = QColor( (int)(255.0*1), (int)(255.0*0.18), (int)(255.0*1));
    namedColors["RoyalBlue"] = QColor( (int)(255.0*0), (int)(255.0*0.5), (int)(255.0*1));
    namedColors["RubineRed"] = QColor( (int)(255.0*1), (int)(255.0*0), (int)(255.0*0.87));
    namedColors["Turquoise"] = QColor( (int)(255.0*0.15), (int)(255.0*1), (int)(255.0*0.8));
    namedColors["VioletRed"] = QColor( (int)(255.0*1), (int)(255.0*0.19), (int)(255.0*1));
    namedColors["Aquamarine"] = QColor( (int)(255.0*0.18), (int)(255.0*1), (int)(255.0*0.7));
    namedColors["BlueViolet"] = QColor( (int)(255.0*0.1), (int)(255.0*0.05), (int)(255.0*0.96));
    namedColors["DarkOrchid"] = QColor( (int)(255.0*0.6), (int)(255.0*0.2), (int)(255.0*0.8));
    namedColors["OliveGreen"] = QColor( (int)(255.0*0), (int)(255.0*0.6), (int)(255.0*0));
    namedColors["Periwinkle"] = QColor( (int)(255.0*0.43), (int)(255.0*0.45), (int)(255.0*1));
    namedColors["Bittersweet"] = QColor( (int)(255.0*0.76), (int)(255.0*0.01), (int)(255.0*0));
    namedColors["BurntOrange"] = QColor( (int)(255.0*1), (int)(255.0*0.49), (int)(255.0*0));
    namedColors["ForestGreen"] = QColor( (int)(255.0*0), (int)(255.0*0.88), (int)(255.0*0));
    namedColors["GreenYellow"] = QColor( (int)(255.0*0.85), (int)(255.0*1), (int)(255.0*0.31));
    namedColors["JungleGreen"] = QColor( (int)(255.0*0.01), (int)(255.0*1), (int)(255.0*0.48));
    namedColors["ProcessBlue"] = QColor( (int)(255.0*0.04), (int)(255.0*1), (int)(255.0*1));
    namedColors["RoyalPurple"] = QColor( (int)(255.0*0.25), (int)(255.0*0.1), (int)(255.0*1));
    namedColors["SpringGreen"] = QColor( (int)(255.0*0.74), (int)(255.0*1), (int)(255.0*0.24));
    namedColors["YellowGreen"] = QColor( (int)(255.0*0.56), (int)(255.0*1), (int)(255.0*0.26));
    namedColors["MidnightBlue"] = QColor( (int)(255.0*0), (int)(255.0*0.44), (int)(255.0*0.57));
    namedColors["YellowOrange"] = QColor( (int)(255.0*1), (int)(255.0*0.58), (int)(255.0*0));
    namedColors["CarnationPink"] = QColor( (int)(255.0*1), (int)(255.0*0.37), (int)(255.0*1));
    namedColors["CornflowerBlue"] = QColor( (int)(255.0*0.35), (int)(255.0*0.87), (int)(255.0*1));
    namedColors["WildStrawberry"] = QColor( (int)(255.0*1), (int)(255.0*0.04), (int)(255.0*0.61));
  }
  
  QString specType = colorSpec.section(' ', 0, 0);

  if (specType.find("rgb", false) == 0) {
    bool ok;

    double r = colorSpec.section(' ', 1, 1).toDouble(&ok);
    if ((ok == false) || (r < 0.0) || (r > 1.0))
      return QColor();
    
    double g = colorSpec.section(' ', 2, 2).toDouble(&ok);
    if ((ok == false) || (g < 0.0) || (g > 1.0))
      return QColor();
    
    double b = colorSpec.section(' ', 3, 3).toDouble(&ok);
    if ((ok == false) || (b < 0.0) || (b > 1.0))
      return QColor();

    return QColor((int)(r*255.0+0.5), (int)(g*255.0+0.5), (int)(b*255.0+0.5));
  }

  if (specType.find("hsb", false) == 0) {
    bool ok;

    double h = colorSpec.section(' ', 1, 1).toDouble(&ok);
    if ((ok == false) || (h < 0.0) || (h > 1.0))
      return QColor();
    
    double s = colorSpec.section(' ', 2, 2).toDouble(&ok);
    if ((ok == false) || (s < 0.0) || (s > 1.0))
      return QColor();
    
    double b = colorSpec.section(' ', 3, 3).toDouble(&ok);
    if ((ok == false) || (b < 0.0) || (b > 1.0))
      return QColor();

    return QColor((int)(h*359.0+0.5), (int)(s*255.0+0.5), (int)(b*255.0+0.5), QColor::Hsv);
  }

  if (specType.find("cmyk", false) == 0) {
    bool ok;

    double c = colorSpec.section(' ', 1, 1).toDouble(&ok);
    if ((ok == false) || (c < 0.0) || (c > 1.0))
      return QColor();
    
    double m = colorSpec.section(' ', 2, 2).toDouble(&ok);
    if ((ok == false) || (m < 0.0) || (m > 1.0))
      return QColor();
    
    double y = colorSpec.section(' ', 3, 3).toDouble(&ok);
    if ((ok == false) || (y < 0.0) || (y > 1.0))
      return QColor();
    
    double k = colorSpec.section(' ', 3, 3).toDouble(&ok);
    if ((ok == false) || (k < 0.0) || (k > 1.0))
      return QColor();

    // Convert cmyk coordinates to rgb.
    double r = 1.0 - c - k;
    if (r < 0.0)
      r = 0.0;
    double g = 1.0 - m - k;
    if (g < 0.0)
      g = 0.0;
    double b = 1.0 - y - k;
    if (b < 0.0)
      b = 0.0;

    return QColor((int)(r*255.0+0.5), (int)(g*255.0+0.5), (int)(b*255.0+0.5));
  }

  if (specType.find("gray", false) == 0) {
    bool ok;

    double g = colorSpec.section(' ', 1, 1).toDouble(&ok);
    if ((ok == false) || (g < 0.0) || (g > 1.0))
      return QColor();
    
    return QColor((int)(g*255.0+0.5), (int)(g*255.0+0.5), (int)(g*255.0+0.5));
  }

  // Check if the color is one of the known named colors.
  QMap<QString, QColor>::Iterator f = namedColors.find(specType);
  if (f != namedColors.end())
    return *f;
  
  return QColor(specType);
}






void dviRenderer::color_special(const QString& _cp)
{
  QString const cp = _cp.stripWhiteSpace();
  
  QString command = cp.section(' ', 0, 0);
  
  if (command == "pop") {
    // Take color off the stack
    if (colorStack.isEmpty())
      printErrorMsgForSpecials( i18n("Error in DVIfile '%1', page %2. Color pop command issued when the color stack is empty." ).
				arg(dviFile->filename).arg(current_page));
    else
      colorStack.pop();
    return;
  }
  
  if (command == "push") {
    // Get color specification
    QColor const col = parseColorSpecification(cp.section(' ', 1));
    // Set color
    if (col.isValid()) 
      colorStack.push(col); 
    else
      colorStack.push(Qt::black); 
    return;
  }
  
  // Get color specification and set the color for the rest of this
  // page
  QColor col = parseColorSpecification(cp);
  // Set color
  if (col.isValid()) 
    globalColor = col;
  else
    globalColor = Qt::black;
  return;
}


void dviRenderer::html_href_special(const QString& _cp)
{
  QString cp = _cp;
  cp.truncate(cp.find('"'));
  
#ifdef DEBUG_SPECIAL
  kdDebug(4300) << "HTML-special, href " << cp.latin1() << endl;
#endif
  HTML_href = new QString(cp);
}


void dviRenderer::html_anchor_end()
{
#ifdef DEBUG_SPECIAL
  kdDebug(4300) << "HTML-special, anchor-end" << endl;
#endif

  if (HTML_href != NULL) {
    delete HTML_href;
    HTML_href = NULL;
  }
}


void dviRenderer::source_special(const QString& cp)
{
  // only when rendering really takes place: set source_href to the
  // current special string. When characters are rendered, the
  // rendering routine will then generate a DVI_HyperLink and add it
  // to the proper list. This DVI_HyperLink is used to match mouse
  // positions with the hyperlinks for inverse search.
  if (source_href)
    *source_href = cp;
  else
    source_href = new QString(cp);
}


void parse_special_argument(const QString& strg, const char* argument_name, int* variable)
{
  int index = strg.find(argument_name);
  if (index >= 0) {
    QString tmp = strg.mid(index + strlen(argument_name));
    index = tmp.find(' ');
    if (index >= 0)
      tmp.truncate(index);

    bool OK;
    float const tmp_float = tmp.toFloat(&OK);

    if (OK)
      *variable = int(tmp_float+0.5);
    else
      // Maybe we should open a dialog here.
      kdError(4300) << i18n("Malformed parameter in the epsf special command.\n"
                            "Expected a float to follow %1 in %2")
                       .arg(argument_name).arg(strg) << endl;
  }
}


void dviRenderer::epsf_special(const QString& cp)
{
#ifdef DEBUG_SPECIAL
  kdDebug(4300) << "epsf-special: psfile=" << cp <<endl;
#endif

  QString include_command = cp.simplifyWhiteSpace();

  // The line is supposed to start with "..ile=", and then comes the
  // filename. Figure out what the filename is and stow it away. Of
  // course, this does not work if the filename contains spaces
  // (already the simplifyWhiteSpace() above is wrong). If you have
  // files like this, go away.
  QString EPSfilename_orig = include_command;
  EPSfilename_orig.truncate(EPSfilename_orig.find(' '));

  // Strip enclosing quotation marks which are included by some LaTeX
  // macro packages (but not by others). This probably means that
  // graphic files are no longer found if the filename really does
  // contain quotes, but we don't really care that much.
  if ((EPSfilename_orig.at(0) == '\"') && (EPSfilename_orig.at(EPSfilename_orig.length()-1) == '\"')) {
    EPSfilename_orig = EPSfilename_orig.mid(1,EPSfilename_orig.length()-2);
  }
  QString EPSfilename = ghostscript_interface::locateEPSfile(EPSfilename_orig, baseURL);
  
  // Now parse the arguments. 
  int  llx     = 0; 
  int  lly     = 0;
  int  urx     = 0;
  int  ury     = 0;
  int  rwi     = 0;
  int  rhi     = 0;
  int  angle   = 0;

  // just to avoid ambiguities; the filename could contain keywords
  include_command = include_command.mid(include_command.find(' '));
  
  parse_special_argument(include_command, "llx=", &llx);
  parse_special_argument(include_command, "lly=", &lly);
  parse_special_argument(include_command, "urx=", &urx);
  parse_special_argument(include_command, "ury=", &ury);
  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->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.smoothScale((int)(bbox_width), (int)(bbox_height));
    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_orig, -1);
    else
      foreGroundPainter->drawText (bbox, (int)(Qt::AlignCenter), 
				i18n("File not found: \n %1").arg(EPSfilename_orig), -1);
    foreGroundPainter->restore();
  }
  
  return;
}


void dviRenderer::TPIC_flushPath_special()
{
#ifdef DEBUG_SPECIAL
  kdDebug(4300) << "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, 0, number_of_elements_in_path);
  number_of_elements_in_path = 0;
}


void dviRenderer::TPIC_addPath_special(const QString& cp)
{
#ifdef DEBUG_SPECIAL
  kdDebug(4300) << "TPIC special addPath: " << cp << endl;
#endif

  // Adds a point to the path list
  QString cp_noWhiteSpace = cp.stripWhiteSpace();
  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
  kdDebug(4300) << "TPIC special setPen: " << cp << endl;
#endif
  
  // Sets the pen size in milli-inches
  bool ok;
  penWidth_in_mInch = cp.stripWhiteSpace().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()) {
        // Parse the PostScript literal text string inside parentheses
        // and store it into 'targetName'.  The scanner works
        // according to "PostScript language reference, third edition"
        // - Sec. 3.2.2. The specification is implemented completely:
        // balanced parentheses and all escape sequences are
        // considered.
        QString tmpTargetName = special_command.section('(', 1);
        QString targetName;
        int parencount = 1;
        for(int i=0; i<tmpTargetName.length(); i++) {
          if (tmpTargetName[i] == '(')
	    if ((i == 0) || (tmpTargetName[i-1] != '\\'))
	      parencount++;
          if (tmpTargetName[i] == ')')
	    if ((i == 0) || (tmpTargetName[i-1] != '\\'))
	      parencount--;
          if (parencount == 0)
            break;
          targetName += tmpTargetName[i];
        }
        targetName = PDFencodingToQString(targetName);
	
	QValueVector<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." ).
				arg(dviFile->filename).arg(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.").arg(special_command));
  return;
}