contrib/groff/src/xditview/Dvi.c

   1 #ifndef SABER
   2 #ifndef lint
   3 static char Xrcsid[] = "$XConsortium: Dvi.c,v 1.9 89/12/10 16:12:25 rws Exp $";
   4 #endif /* lint */
   5 #endif /* SABER */
   6
   7 /*
   8  * Dvi.c - Dvi display widget
   9  *
  10  */
  11
  12 #define XtStrlen(s)     ((s) ? strlen(s) : 0)
  13
  14   /* The following are defined for the reader's convenience.  Any
  15      Xt..Field macro in this code just refers to some field in
  16      one of the substructures of the WidgetRec.  */
  17
  18 #include <X11/IntrinsicP.h>
  19 #include <X11/StringDefs.h>
  20 #include <X11/Xmu/Converters.h>
  21 #include <stdio.h>
  22 #include <ctype.h>
  23 #include "DviP.h"
  24
  25 /****************************************************************
  26  *
  27  * Full class record constant
  28  *
  29  ****************************************************************/
  30
  31 /* Private Data */
  32
  33 static char default_font_map[] =  "\
  34 TR      -adobe-times-medium-r-normal--*-100-*-*-*-*-iso8859-1\n\
  35 TI      -adobe-times-medium-i-normal--*-100-*-*-*-*-iso8859-1\n\
  36 TB      -adobe-times-bold-r-normal--*-100-*-*-*-*-iso8859-1\n\
  37 TBI     -adobe-times-bold-i-normal--*-100-*-*-*-*-iso8859-1\n\
  38 CR      -adobe-courier-medium-r-normal--*-100-*-*-*-*-iso8859-1\n\
  39 CI      -adobe-courier-medium-o-normal--*-100-*-*-*-*-iso8859-1\n\
  40 CB      -adobe-courier-bold-r-normal--*-100-*-*-*-*-iso8859-1\n\
  41 CBI     -adobe-courier-bold-o-normal--*-100-*-*-*-*-iso8859-1\n\
  42 HR      -adobe-helvetica-medium-r-normal--*-100-*-*-*-*-iso8859-1\n\
  43 HI      -adobe-helvetica-medium-o-normal--*-100-*-*-*-*-iso8859-1\n\
  44 HB      -adobe-helvetica-bold-r-normal--*-100-*-*-*-*-iso8859-1\n\
  45 HBI     -adobe-helvetica-bold-o-normal--*-100-*-*-*-*-iso8859-1\n\
  46 NR      -adobe-new century schoolbook-medium-r-normal--*-100-*-*-*-*-iso8859-1\n\
  47 NI      -adobe-new century schoolbook-medium-i-normal--*-100-*-*-*-*-iso8859-1\n\
  48 NB      -adobe-new century schoolbook-bold-r-normal--*-100-*-*-*-*-iso8859-1\n\
  49 NBI     -adobe-new century schoolbook-bold-i-normal--*-100-*-*-*-*-iso8859-1\n\
  50 S       -adobe-symbol-medium-r-normal--*-100-*-*-*-*-adobe-fontspecific\n\
  51 SS      -adobe-symbol-medium-r-normal--*-100-*-*-*-*-adobe-fontspecific\n\
  52 ";
  53
  54 #define offset(field) XtOffset(DviWidget, field)
  55
  56 #define MY_WIDTH(dw) ((int)(dw->dvi.paperwidth * dw->dvi.scale_factor + .5))
  57 #define MY_HEIGHT(dw) ((int)(dw->dvi.paperlength * dw->dvi.scale_factor + .5))
  58
  59 static XtResource resources[] = {
  60         {XtNfontMap, XtCFontMap, XtRString, sizeof (char *),
  61          offset(dvi.font_map_string), XtRString, default_font_map},
  62         {XtNforeground, XtCForeground, XtRPixel, sizeof (unsigned long),
  63          offset(dvi.foreground), XtRString, "XtDefaultForeground"},
  64         {XtNbackground, XtCBackground, XtRPixel, sizeof (unsigned long),
  65          offset(dvi.background), XtRString, "XtDefaultBackground"},
  66         {XtNpageNumber, XtCPageNumber, XtRInt, sizeof (int),
  67          offset(dvi.requested_page), XtRString, "1"},
  68         {XtNlastPageNumber, XtCLastPageNumber, XtRInt, sizeof (int),
  69          offset (dvi.last_page), XtRString, "0"},
  70         {XtNfile, XtCFile, XtRFile, sizeof (FILE *),
  71          offset (dvi.file), XtRFile, (char *) 0},
  72         {XtNseek, XtCSeek, XtRBoolean, sizeof (Boolean),
  73          offset(dvi.seek), XtRString, "false"},
  74         {XtNfont, XtCFont, XtRFontStruct, sizeof (XFontStruct *),
  75          offset(dvi.default_font), XtRString, "xtdefaultfont"},
  76         {XtNbackingStore, XtCBackingStore, XtRBackingStore, sizeof (int),
  77          offset(dvi.backing_store), XtRString, "default"},
  78         {XtNnoPolyText, XtCNoPolyText, XtRBoolean, sizeof (Boolean),
  79          offset(dvi.noPolyText), XtRString, "false"},
  80         {XtNresolution, XtCResolution, XtRInt, sizeof(int),
  81          offset(dvi.default_resolution), XtRString, "75"},
  82 };
  83
  84 #undef offset
  85
  86 static void             ClassInitialize ();
  87 static void             ClassPartInitialize();
  88 static void             Initialize(), Realize (), Destroy (), Redisplay ();
  89 static Boolean          SetValues (), SetValuesHook ();
  90 static XtGeometryResult QueryGeometry ();
  91 static void             ShowDvi ();
  92 static void             CloseFile (), OpenFile ();
  93 static void             FindPage ();
  94
  95 static void             SaveToFile ();
  96
  97 DviClassRec dviClassRec = {
  98 {
  99         &widgetClassRec,                /* superclass             */
 100         "Dvi",                          /* class_name             */
 101         sizeof(DviRec),                 /* size                   */
 102         ClassInitialize,                /* class_initialize       */
 103         ClassPartInitialize,            /* class_part_initialize  */
 104         FALSE,                          /* class_inited           */
 105         Initialize,                     /* initialize             */
 106         NULL,                           /* initialize_hook        */
 107         Realize,                        /* realize                */
 108         NULL,                           /* actions                */
 109         0,                              /* num_actions            */
 110         resources,                      /* resources              */
 111         XtNumber(resources),            /* resource_count         */
 112         NULLQUARK,                      /* xrm_class              */
 113         FALSE,                          /* compress_motion        */
 114         TRUE,                           /* compress_exposure      */
 115         TRUE,                           /* compress_enterleave    */
 116         FALSE,                          /* visible_interest       */
 117         Destroy,                        /* destroy                */
 118         NULL,                           /* resize                 */
 119         Redisplay,                      /* expose                 */
 120         SetValues,                      /* set_values             */
 121         SetValuesHook,                  /* set_values_hook        */
 122         NULL,                           /* set_values_almost      */
 123         NULL,                           /* get_values_hook        */
 124         NULL,                           /* accept_focus           */
 125         XtVersion,                      /* version                */
 126         NULL,                           /* callback_private       */
 127         0,                              /* tm_table               */
 128         QueryGeometry,                  /* query_geometry         */
 129         NULL,                           /* display_accelerator    */
 130         NULL                            /* extension              */
 131 },{
 132         SaveToFile,                     /* save    */
 133 },
 134 };
 135
 136 WidgetClass dviWidgetClass = (WidgetClass) &dviClassRec;
 137
 138 static void ClassInitialize ()
 139 {
 140         XtAddConverter( XtRString, XtRBackingStore, XmuCvtStringToBackingStore,
 141                         NULL, 0 );
 142 }
 143
 144 /****************************************************************
 145  *
 146  * Private Procedures
 147  *
 148  ****************************************************************/
 149
 150 /* ARGSUSED */
 151 static void Initialize(request, new)
 152         Widget request, new;
 153 {
 154         DviWidget       dw = (DviWidget) new;
 155
 156         dw->dvi.current_page = 0;
 157         dw->dvi.font_map = 0;
 158         dw->dvi.cache.index = 0;
 159         dw->dvi.text_x_width = 0;
 160         dw->dvi.text_device_width = 0;
 161         dw->dvi.word_flag = 0;
 162         dw->dvi.file = 0;
 163         dw->dvi.tmpFile = 0;
 164         dw->dvi.state = 0;
 165         dw->dvi.readingTmp = 0;
 166         dw->dvi.cache.char_index = 0;
 167         dw->dvi.cache.font_size = -1;
 168         dw->dvi.cache.font_number = -1;
 169         dw->dvi.cache.adjustable[0] = 0;
 170         dw->dvi.file_map = 0;
 171         dw->dvi.fonts = 0;
 172         dw->dvi.seek = False;
 173         dw->dvi.device_resolution = dw->dvi.default_resolution;
 174         dw->dvi.display_resolution = dw->dvi.default_resolution;
 175         dw->dvi.paperlength = dw->dvi.default_resolution*11;
 176         dw->dvi.paperwidth = (dw->dvi.default_resolution*8
 177                               + dw->dvi.default_resolution/2);
 178         dw->dvi.scale_factor = 1.0;
 179         dw->dvi.sizescale = 1;
 180         dw->dvi.line_thickness = -1;
 181         dw->dvi.line_width = 1;
 182         dw->dvi.fill = DVI_FILL_MAX;
 183         dw->dvi.device_font = 0;
 184         dw->dvi.device_font_number = -1;
 185         dw->dvi.device = 0;
 186         dw->dvi.native = 0;
 187 }
 188
 189 #include "gray1.bm"
 190 #include "gray2.bm"
 191 #include "gray3.bm"
 192 #include "gray4.bm"
 193 #include "gray5.bm"
 194 #include "gray6.bm"
 195 #include "gray7.bm"
 196 #include "gray8.bm"
 197
 198 static void
 199 Realize (w, valueMask, attrs)
 200         Widget                  w;
 201         XtValueMask             *valueMask;
 202         XSetWindowAttributes    *attrs;
 203 {
 204         DviWidget       dw = (DviWidget) w;
 205         XGCValues       values;
 206
 207         if (dw->dvi.backing_store != Always + WhenMapped + NotUseful) {
 208                 attrs->backing_store = dw->dvi.backing_store;
 209                 *valueMask |= CWBackingStore;
 210         }
 211         XtCreateWindow (w, (unsigned)InputOutput, (Visual *) CopyFromParent,
 212                         *valueMask, attrs);
 213         values.foreground = dw->dvi.foreground;
 214         values.cap_style = CapRound;
 215         values.join_style = JoinRound;
 216         values.line_width = dw->dvi.line_width;
 217         dw->dvi.normal_GC = XCreateGC (XtDisplay (w), XtWindow (w),
 218                                        GCForeground|GCCapStyle|GCJoinStyle
 219                                        |GCLineWidth,
 220                                        &values);
 221         dw->dvi.gray[0] = XCreateBitmapFromData(XtDisplay (w), XtWindow (w),
 222                                              gray1_bits,
 223                                              gray1_width, gray1_height);
 224         dw->dvi.gray[1] = XCreateBitmapFromData(XtDisplay (w), XtWindow (w),
 225                                              gray2_bits,
 226                                              gray2_width, gray2_height);
 227         dw->dvi.gray[2] = XCreateBitmapFromData(XtDisplay (w), XtWindow (w),
 228                                              gray3_bits,
 229                                              gray3_width, gray3_height);
 230         dw->dvi.gray[3] = XCreateBitmapFromData(XtDisplay (w), XtWindow (w),
 231                                              gray4_bits,
 232                                              gray4_width, gray4_height);
 233         dw->dvi.gray[4] = XCreateBitmapFromData(XtDisplay (w), XtWindow (w),
 234                                              gray5_bits,
 235                                              gray5_width, gray5_height);
 236         dw->dvi.gray[5] = XCreateBitmapFromData(XtDisplay (w), XtWindow (w),
 237                                              gray6_bits,
 238                                              gray6_width, gray6_height);
 239         dw->dvi.gray[6] = XCreateBitmapFromData(XtDisplay (w), XtWindow (w),
 240                                              gray7_bits,
 241                                              gray7_width, gray7_height);
 242         dw->dvi.gray[7] = XCreateBitmapFromData(XtDisplay (w), XtWindow (w),
 243                                              gray8_bits,
 244                                              gray8_width, gray8_height);
 245         values.background = dw->dvi.background;
 246         values.stipple = dw->dvi.gray[5];
 247         dw->dvi.fill_GC = XCreateGC (XtDisplay (w), XtWindow (w),
 248                                      GCForeground|GCBackground|GCStipple,
 249                                      &values);
 250
 251         dw->dvi.fill_type = 9;
 252
 253         if (dw->dvi.file)
 254                 OpenFile (dw);
 255         ParseFontMap (dw);
 256 }
 257
 258 static void
 259 Destroy(w)
 260         Widget w;
 261 {
 262         DviWidget       dw = (DviWidget) w;
 263
 264         XFreeGC (XtDisplay (w), dw->dvi.normal_GC);
 265         XFreeGC (XtDisplay (w), dw->dvi.fill_GC);
 266         XFreePixmap (XtDisplay (w), dw->dvi.gray[0]);
 267         XFreePixmap (XtDisplay (w), dw->dvi.gray[1]);
 268         XFreePixmap (XtDisplay (w), dw->dvi.gray[2]);
 269         XFreePixmap (XtDisplay (w), dw->dvi.gray[3]);
 270         XFreePixmap (XtDisplay (w), dw->dvi.gray[4]);
 271         XFreePixmap (XtDisplay (w), dw->dvi.gray[5]);
 272         XFreePixmap (XtDisplay (w), dw->dvi.gray[6]);
 273         XFreePixmap (XtDisplay (w), dw->dvi.gray[7]);
 274         DestroyFontMap (dw->dvi.font_map);
 275         DestroyFileMap (dw->dvi.file_map);
 276         device_destroy (dw->dvi.device);
 277 }
 278
 279 /*
 280  * Repaint the widget window
 281  */
 282
 283 /* ARGSUSED */
 284 static void
 285 Redisplay(w, event, region)
 286         Widget w;
 287         XEvent *event;
 288         Region region;
 289 {
 290         DviWidget       dw = (DviWidget) w;
 291         XRectangle      extents;
 292
 293         XClipBox (region, &extents);
 294         dw->dvi.extents.x1 = extents.x;
 295         dw->dvi.extents.y1 = extents.y;
 296         dw->dvi.extents.x2 = extents.x + extents.width;
 297         dw->dvi.extents.y2 = extents.y + extents.height;
 298         ShowDvi (dw);
 299 }
 300
 301 /*
 302  * Set specified arguments into widget
 303  */
 304 /* ARGSUSED */
 305 static Boolean
 306 SetValues (current, request, new)
 307         DviWidget current, request, new;
 308 {
 309         Boolean         redisplay = FALSE;
 310         char            *new_map;
 311         int             cur, req;
 312
 313         if (current->dvi.font_map_string != request->dvi.font_map_string) {
 314                 new_map = XtMalloc (strlen (request->dvi.font_map_string) + 1);
 315                 if (new_map) {
 316                         redisplay = TRUE;
 317                         strcpy (new_map, request->dvi.font_map_string);
 318                         new->dvi.font_map_string = new_map;
 319                         if (current->dvi.font_map_string)
 320                                 XtFree (current->dvi.font_map_string);
 321                         current->dvi.font_map_string = 0;
 322                         ParseFontMap (new);
 323                 }
 324         }
 325
 326         req = request->dvi.requested_page;
 327         cur = current->dvi.requested_page;
 328         if (cur != req) {
 329                 if (!request->dvi.file)
 330                     req = 0;
 331                 else {
 332                     if (req < 1)
 333                             req = 1;
 334                     if (current->dvi.last_page != 0 &&
 335                         req > current->dvi.last_page)
 336                             req = current->dvi.last_page;
 337                 }
 338                 if (cur != req)
 339                     redisplay = TRUE;
 340                 new->dvi.requested_page = req;
 341                 if (current->dvi.last_page == 0 && req > cur)
 342                         FindPage (new);
 343         }
 344
 345         return redisplay;
 346 }
 347
 348 /*
 349  * use the set_values_hook entry to check when
 350  * the file is set
 351  */
 352
 353 static Boolean
 354 SetValuesHook (dw, args, num_argsp)
 355         DviWidget       dw;
 356         ArgList         args;
 357         Cardinal        *num_argsp;
 358 {
 359         Cardinal        i;
 360
 361         for (i = 0; i < *num_argsp; i++) {
 362                 if (!strcmp (args[i].name, XtNfile)) {
 363                         CloseFile (dw);
 364                         OpenFile (dw);
 365                         return TRUE;
 366                 }
 367         }
 368         return FALSE;
 369 }
 370
 371 static void CloseFile (dw)
 372         DviWidget       dw;
 373 {
 374         if (dw->dvi.tmpFile)
 375                 fclose (dw->dvi.tmpFile);
 376         ForgetPagePositions (dw);
 377 }
 378
 379 static void OpenFile (dw)
 380         DviWidget       dw;
 381 {
 382         dw->dvi.tmpFile = 0;
 383         if (!dw->dvi.seek)
 384                 dw->dvi.tmpFile = tmpfile();
 385         dw->dvi.requested_page = 1;
 386         dw->dvi.last_page = 0;
 387 }
 388
 389 static XtGeometryResult
 390 QueryGeometry (w, request, geometry_return)
 391         Widget                  w;
 392         XtWidgetGeometry        *request, *geometry_return;
 393 {
 394         XtGeometryResult        ret;
 395         DviWidget               dw = (DviWidget) w;
 396
 397         ret = XtGeometryYes;
 398         if (((request->request_mode & CWWidth)
 399              && request->width < MY_WIDTH(dw))
 400             || ((request->request_mode & CWHeight)
 401                 && request->height < MY_HEIGHT(dw)))
 402                 ret = XtGeometryAlmost;
 403         geometry_return->width = MY_WIDTH(dw);
 404         geometry_return->height = MY_HEIGHT(dw);
 405         geometry_return->request_mode = CWWidth|CWHeight;
 406         return ret;
 407 }
 408
 409 SetDevice (dw, name)
 410         DviWidget       dw;
 411         char            *name;
 412 {
 413         XtWidgetGeometry        request, reply;
 414         XtGeometryResult ret;
 415
 416         ForgetFonts (dw);
 417         dw->dvi.device = device_load (name);
 418         if (!dw->dvi.device)
 419                 return;
 420         dw->dvi.sizescale = dw->dvi.device->sizescale;
 421         dw->dvi.device_resolution = dw->dvi.device->res;
 422         dw->dvi.native = dw->dvi.device->X11;
 423         dw->dvi.paperlength = dw->dvi.device->paperlength;
 424         dw->dvi.paperwidth = dw->dvi.device->paperwidth;
 425         if (dw->dvi.native) {
 426                 dw->dvi.display_resolution = dw->dvi.device_resolution;
 427                 dw->dvi.scale_factor = 1.0;
 428         }
 429         else {
 430                 dw->dvi.display_resolution = dw->dvi.default_resolution;
 431                 dw->dvi.scale_factor = ((double)dw->dvi.display_resolution
 432                                         / dw->dvi.device_resolution);
 433         }
 434         request.request_mode = CWWidth|CWHeight;
 435         request.width = MY_WIDTH(dw);
 436         request.height = MY_HEIGHT(dw);
 437         ret = XtMakeGeometryRequest ((Widget)dw, &request, &reply);
 438         if (ret == XtGeometryAlmost
 439             && reply.height >= request.height
 440             && reply.width >= request.width) {
 441                 request.width = reply.width;
 442                 request.height = reply.height;
 443                 XtMakeGeometryRequest ((Widget)dw, &request, &reply);
 444         }
 445 }
 446
 447 static void
 448 ShowDvi (dw)
 449         DviWidget       dw;
 450 {
 451         if (!dw->dvi.file) {
 452                 static char Error[] = "No file selected";
 453
 454                 XSetFont (XtDisplay(dw), dw->dvi.normal_GC,
 455                           dw->dvi.default_font->fid);
 456                 XDrawString (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
 457                              20, 20, Error, strlen (Error));
 458                 return;
 459         }
 460
 461         FindPage (dw);
 462
 463         dw->dvi.display_enable = 1;
 464         ParseInput (dw);
 465         if (dw->dvi.last_page && dw->dvi.requested_page > dw->dvi.last_page)
 466                 dw->dvi.requested_page = dw->dvi.last_page;
 467 }
 468
 469 static void
 470 FindPage (dw)
 471         DviWidget       dw;
 472 {
 473         int     i;
 474         long    file_position;
 475
 476         if (dw->dvi.requested_page < 1)
 477                 dw->dvi.requested_page = 1;
 478
 479         if (dw->dvi.last_page != 0 && dw->dvi.requested_page > dw->dvi.last_page)
 480                 dw->dvi.requested_page = dw->dvi.last_page;
 481
 482         file_position = SearchPagePosition (dw, dw->dvi.requested_page);
 483         if (file_position != -1) {
 484                 FileSeek(dw, file_position);
 485                 dw->dvi.current_page = dw->dvi.requested_page;
 486         } else {
 487                 for (i=dw->dvi.requested_page; i > 0; i--) {
 488                         file_position = SearchPagePosition (dw, i);
 489                         if (file_position != -1)
 490                                 break;
 491                 }
 492                 if (file_position == -1)
 493                         file_position = 0;
 494                 FileSeek (dw, file_position);
 495
 496                 dw->dvi.current_page = i;
 497
 498                 dw->dvi.display_enable = 0;
 499                 while (dw->dvi.current_page != dw->dvi.requested_page) {
 500                         dw->dvi.current_page = ParseInput (dw);
 501                         /*
 502                          * at EOF, seek back to the beginning of this page.
 503                          */
 504                         if (!dw->dvi.readingTmp && feof (dw->dvi.file)) {
 505                                 file_position = SearchPagePosition (dw,
 506                                                 dw->dvi.current_page);
 507                                 if (file_position != -1)
 508                                         FileSeek (dw, file_position);
 509                                 dw->dvi.requested_page = dw->dvi.current_page;
 510                                 break;
 511                         }
 512                 }
 513         }
 514 }
 515
 516 void DviSaveToFile(w, fp)
 517         Widget w;
 518         FILE *fp;
 519 {
 520         XtCheckSubclass(w, dviWidgetClass, NULL);
 521         (*((DviWidgetClass) XtClass(w))->command_class.save)(w, fp);
 522 }
 523
 524 static
 525 void SaveToFile(w, fp)
 526         Widget w;
 527         FILE *fp;
 528 {
 529         DviWidget dw = (DviWidget)w;
 530         long pos;
 531         int c;
 532
 533         if (dw->dvi.tmpFile) {
 534                 pos = ftell(dw->dvi.tmpFile);
 535                 if (dw->dvi.ungot) {
 536                         pos--;
 537                         dw->dvi.ungot = 0;
 538                         /* The ungot character is in the tmpFile, so we don't
 539                            want to read it from file. */
 540                         (void)getc(dw->dvi.file);
 541                 }
 542         }
 543         else
 544                 pos = ftell(dw->dvi.file);
 545         FileSeek(dw, 0L);
 546         while (DviGetC(dw, &c) != EOF)
 547                 if (putc(c, fp) == EOF) {
 548                         /* XXX print error message */
 549                         break;
 550                 }
 551         FileSeek(dw, pos);
 552 }
 553
 554 static
 555 void ClassPartInitialize(widget_class)
 556         WidgetClass widget_class;
 557 {
 558         DviWidgetClass wc = (DviWidgetClass)widget_class;
 559         DviWidgetClass super = (DviWidgetClass) wc->core_class.superclass;
 560         if (wc->command_class.save == InheritSaveToFile)
 561                 wc->command_class.save = super->command_class.save;
 562 }
 563
 564 /*
 565 Local Variables:
 566 c-indent-level: 8
 567 c-continued-statement-offset: 8
 568 c-brace-offset: -8
 569 c-argdecl-indent: 8
 570 c-label-offset: -8
 571 c-tab-always-indent: nil
 572 End:
 573 */