summaryrefslogtreecommitdiff
path: root/Dvi.c
blob: 414802090668d185e67266cc306456130376bd25 (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
/* $XConsortium: Dvi.c,v 1.21 94/04/17 20:43:34 keith Exp $ */
/*

Copyright (c) 1991  X Consortium

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall
not be used in advertising or otherwise to promote the sale, use or
other dealings in this Software without prior written authorization
from the X Consortium.

*/
/* $XFree86: xc/programs/xditview/Dvi.c,v 1.4 2001/08/27 23:35:12 dawes Exp $ */


/*
 * Dvi.c - Dvi display widget
 */

#define XtStrlen(s)	((s) ? strlen(s) : 0)

  /* The following are defined for the reader's convenience.  Any
     Xt..Field macro in this code just refers to some field in
     one of the substructures of the WidgetRec.  */

#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>
#include <X11/Xmu/Converters.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include "DviP.h"

/****************************************************************
 *
 * Full class record constant
 *
 ****************************************************************/

/* Private Data */
/* Note: default_font_map was too long a token for some machines...
 *       therefor it has been split in to and assigned to resources
 *       in the ClassInitialize routine.
 */
static char default_font_map_1[] =  "\
R	-*-times-medium-r-normal--*-*-*-*-*-*-iso8859-1\n\
I	-*-times-medium-i-normal--*-*-*-*-*-*-iso8859-1\n\
B	-*-times-bold-r-normal--*-*-*-*-*-*-iso8859-1\n\
F	-*-times-bold-i-normal--*-*-*-*-*-*-iso8859-1\n\
TR	-*-times-medium-r-normal--*-*-*-*-*-*-iso8859-1\n\
TI	-*-times-medium-i-normal--*-*-*-*-*-*-iso8859-1\n\
TB	-*-times-bold-r-normal--*-*-*-*-*-*-iso8859-1\n\
TF	-*-times-bold-i-normal--*-*-*-*-*-*-iso8859-1\n\
BI	-*-times-bold-i-normal--*-*-*-*-*-*-iso8859-1\n\
C	-*-courier-medium-r-normal--*-*-*-*-*-*-iso8859-1\n\
CO	-*-courier-medium-o-normal--*-*-*-*-*-*-iso8859-1\n\
CB	-*-courier-bold-r-normal--*-*-*-*-*-*-iso8859-1\n\
CF	-*-courier-bold-o-normal--*-*-*-*-*-*-iso8859-1\n\
H	-*-helvetica-medium-r-normal--*-*-*-*-*-*-iso8859-1\n\
HO	-*-helvetica-medium-o-normal--*-*-*-*-*-*-iso8859-1\n\
HB	-*-helvetica-bold-r-normal--*-*-*-*-*-*-iso8859-1\n\
HF	-*-helvetica-bold-o-normal--*-*-*-*-*-*-iso8859-1\n\
";
static char default_font_map_2[] =  "\
N	-*-new century schoolbook-medium-r-normal--*-*-*-*-*-*-iso8859-1\n\
NI	-*-new century schoolbook-medium-i-normal--*-*-*-*-*-*-iso8859-1\n\
NB	-*-new century schoolbook-bold-r-normal--*-*-*-*-*-*-iso8859-1\n\
NF	-*-new century schoolbook-bold-i-normal--*-*-*-*-*-*-iso8859-1\n\
A	-*-charter-medium-r-normal--*-*-*-*-*-*-iso8859-1\n\
AI	-*-charter-medium-i-normal--*-*-*-*-*-*-iso8859-1\n\
AB	-*-charter-bold-r-normal--*-*-*-*-*-*-iso8859-1\n\
AF	-*-charter-bold-i-normal--*-*-*-*-*-*-iso8859-1\n\
S	-*-symbol-medium-r-normal--*-*-*-*-*-*-adobe-fontspecific\n\
S2	-*-symbol-medium-r-normal--*-*-*-*-*-*-adobe-fontspecific\n\
";

#define offset(field) XtOffsetOf(DviRec, field)

static XtResource resources[] = { 
	{XtNfontMap, XtCFontMap, XtRString, sizeof (char *),
	 offset(dvi.font_map_string), XtRString, NULL /* set in code */},
	{XtNforeground, XtCForeground, XtRPixel, sizeof (unsigned long),
	 offset(dvi.foreground), XtRString, XtDefaultForeground},
	{XtNpageNumber, XtCPageNumber, XtRInt, sizeof (int),
	 offset(dvi.requested_page), XtRImmediate, (XtPointer) 1},
	{XtNlastPageNumber, XtCLastPageNumber, XtRInt, sizeof (int),
	 offset (dvi.last_page), XtRImmediate, (XtPointer) 0},
	{XtNfile, XtCFile, XtRFile, sizeof (FILE *),
	 offset (dvi.file), XtRFile, (char *) 0},
	{XtNseek, XtCSeek, XtRBoolean, sizeof (Boolean),
	 offset(dvi.seek), XtRImmediate, (XtPointer) False},
	{XtNfont, XtCFont, XtRFontStruct, sizeof (XFontStruct *),
	 offset(dvi.default_font), XtRString, XtDefaultFont},
	{XtNbackingStore, XtCBackingStore, XtRBackingStore, sizeof (int),
	 offset(dvi.backing_store), XtRString, "default"},
	{XtNnoPolyText, XtCNoPolyText, XtRBoolean, sizeof (Boolean),
	 offset(dvi.noPolyText), XtRImmediate, (XtPointer) False},
	{XtNscreenResolution, XtCScreenResolution, XtRInt, sizeof (int),
	 offset(dvi.screen_resolution), XtRImmediate, (XtPointer) 75},
	{XtNpageWidth, XtCPageWidth, XtRFloat, sizeof (float),
	 offset(dvi.page_width), XtRString, "8.5"},
	{XtNpageHeight, XtCPageHeight, XtRFloat, sizeof (float),
	 offset(dvi.page_height), XtRString, "11"},
	{XtNsizeScale, XtCSizeScale, XtRInt, sizeof (int),
	 offset(dvi.size_scale_set), XtRImmediate, (XtPointer) 0},
};

#undef offset

static void		ClassInitialize(void);
static void		Initialize(Widget, Widget, ArgList, Cardinal *);
static void		Realize(Widget, XtValueMask *, XSetWindowAttributes *);
static void		Destroy(Widget);
static void		Redisplay(Widget, XEvent *, Region);
static Boolean		SetValues(Widget, Widget, Widget, ArgList , Cardinal *);
static Boolean		SetValuesHook(Widget, ArgList, Cardinal	*);
static XtGeometryResult	QueryGeometry(Widget,
				      XtWidgetGeometry *, XtWidgetGeometry *);
static void		RequestDesiredSize(DviWidget);
static void		ShowDvi(DviWidget);
static void		CloseFile(DviWidget);
static void		OpenFile(DviWidget);

#define SuperClass ((SimpleWidgetClass)&simpleClassRec)

DviClassRec dviClassRec = {
{
	(WidgetClass) SuperClass,	/* superclass		  */	
	"Dvi",				/* class_name		  */
	sizeof(DviRec),			/* size			  */
	ClassInitialize,		/* class_initialize	  */
	NULL,				/* class_part_initialize  */
	FALSE,				/* class_inited		  */
	Initialize,			/* initialize		  */
	NULL,				/* initialize_hook	  */
	Realize,			/* realize		  */
	NULL,				/* actions		  */
	0,				/* num_actions		  */
	resources,			/* resources		  */
	XtNumber(resources),		/* resource_count	  */
	NULLQUARK,			/* xrm_class		  */
	FALSE,				/* compress_motion	  */
	XtExposeCompressMaximal,    	/* compress_exposure	  */
	TRUE,				/* compress_enterleave    */
	FALSE,				/* visible_interest	  */
	Destroy,			/* destroy		  */
	NULL,				/* resize		  */
	Redisplay,			/* expose		  */
	SetValues,			/* set_values		  */
	SetValuesHook,			/* set_values_hook	  */
	XtInheritSetValuesAlmost,	/* set_values_almost	  */
	NULL,				/* get_values_hook	  */
	NULL,				/* accept_focus		  */
	XtVersion,			/* version		  */
	NULL,				/* callback_private	  */
	0,				/* tm_table		  */
	QueryGeometry,			/* query_geometry	  */
	XtInheritDisplayAccelerator,	/* display_accelerator	  */
	NULL,				/* extension		  */
},  /* CoreClass fields initialization */
{
    XtInheritChangeSensitive		/* change_sensitive	*/
},  /* SimpleClass fields initialization */
{
    0,                                     /* field not used    */
},  /* DviClass fields initialization */
};

WidgetClass dviWidgetClass = (WidgetClass) &dviClassRec;

static void
ClassInitialize (void)
{
  int len1 = strlen(default_font_map_1);
  int len2 = strlen(default_font_map_2);
  char *dfm = XtMalloc(len1 + len2 + 1);
  char *ptr = dfm;
  strcpy(ptr, default_font_map_1); ptr += len1;
  strcpy(ptr, default_font_map_2); 
  resources[0].default_addr = dfm;

  XtAddConverter( XtRString, XtRBackingStore, XmuCvtStringToBackingStore,
		 NULL, 0 );
}

/****************************************************************
 *
 * Private Procedures
 *
 ****************************************************************/

/* ARGSUSED */
static void
Initialize(request, new, args, num_args)
	Widget request, new;
	ArgList args;
	Cardinal *num_args;
{
    DviWidget	dw = (DviWidget) new;

    dw->dvi.tmpFile = 0;
    dw->dvi.readingTmp = 0;
    dw->dvi.ungot = 0;
    dw->dvi.normal_GC = 0;
    dw->dvi.file_map = 0;
    dw->dvi.fonts = 0;
    dw->dvi.font_map = 0;
    dw->dvi.current_page = 0;
    dw->dvi.font_size = 0;
    dw->dvi.font_number = 0;
    dw->dvi.device_resolution = 0;
    dw->dvi.line_width = 0;
    dw->dvi.line_style = 0;
    dw->dvi.font = 0;
    dw->dvi.display_enable = 0;
    dw->dvi.scale = 0.0;
    dw->dvi.state = 0;
    dw->dvi.cache.index = 0;
    dw->dvi.cache.font = 0; 
    dw->dvi.size_scale = 0;
    dw->dvi.size_scale_set = 0;
    RequestDesiredSize (dw);
}

static void
Realize(w, valueMask, attrs)
	Widget			w;
	XtValueMask		*valueMask;
	XSetWindowAttributes	*attrs;
{
    DviWidget	dw = (DviWidget) w;
    XGCValues	values;

    if (dw->dvi.backing_store != Always + WhenMapped + NotUseful) {
	attrs->backing_store = dw->dvi.backing_store;
	*valueMask |= CWBackingStore;
    }
    XtCreateWindow (w, (unsigned)InputOutput, (Visual *) CopyFromParent,
		    *valueMask, attrs);
    values.foreground = dw->dvi.foreground;
    dw->dvi.normal_GC = XCreateGC (XtDisplay (w), XtWindow (w),
				    GCForeground, &values);
#ifdef USE_XFT
    {
	int		scr;
	Visual		*visual;
	Colormap	cmap;
	XRenderColor	black;

	scr = XScreenNumberOfScreen (dw->core.screen);
	visual = DefaultVisual (XtDisplay (w), scr);
	cmap = DefaultColormap (XtDisplay (w), scr);
	dw->dvi.draw = XftDrawCreate (XtDisplay (w), XtWindow (w), 
				      visual, cmap);

	black.red = black.green = black.blue = 0;
	black.alpha = 0xffff;
	XftColorAllocValue (XtDisplay (w), visual, cmap,
			    &black, &dw->dvi.black);
	dw->dvi.default_font = XftFontOpenName (XtDisplay (w),
						scr,
						"serif-12");
    }
#endif
    if (dw->dvi.file)
	OpenFile (dw);
    ParseFontMap (dw);
}

static void
Destroy(w)
	Widget w;
{
	DviWidget	dw = (DviWidget) w;

	XFreeGC (XtDisplay (w), dw->dvi.normal_GC);
	DestroyFontMap (dw->dvi.font_map);
	DestroyFileMap (dw->dvi.file_map);
}

/*
 * Repaint the widget window
 */

/* ARGSUSED */
static void
Redisplay(w, event, region)
	Widget w;
	XEvent *event;
	Region region;
{
	DviWidget	dw = (DviWidget) w;
#ifndef USE_XFT
	XRectangle	extents;
#endif
	
#ifdef USE_XFT
	XClearArea (XtDisplay (dw),
		    XtWindow (dw),
		    0, 0, 0, 0, False);
	dw->dvi.extents.x1 = 0;
	dw->dvi.extents.y1 = 0;
	dw->dvi.extents.x2 = dw->core.width;
	dw->dvi.extents.y2 = dw->core.height;
#else
	XClipBox (region, &extents);
	dw->dvi.extents.x1 = extents.x;
	dw->dvi.extents.y1 = extents.y;
	dw->dvi.extents.x2 = extents.x + extents.width;
	dw->dvi.extents.y2 = extents.y + extents.height;
#endif
	ShowDvi (dw);
}

static void
RequestDesiredSize (dw)
    DviWidget	dw;
{
    XtWidgetGeometry	req, rep;

    dw->dvi.desired_width = dw->dvi.page_width *
				 dw->dvi.screen_resolution;
    dw->dvi.desired_height = dw->dvi.page_height *
				  dw->dvi.screen_resolution;
    req.request_mode = CWWidth|CWHeight;
    req.width = dw->dvi.desired_width;
    req.height = dw->dvi.desired_height;
    XtMakeGeometryRequest ((Widget) dw, &req, &rep);
}

/*
 * Set specified arguments into widget
 */
/* ARGSUSED */
static Boolean
SetValues (wcurrent, wrequest, wnew, args, num_args)
	Widget wcurrent, wrequest, wnew;
	ArgList args;
	Cardinal *num_args;
{
    DviWidget	current = (DviWidget) wcurrent;
    DviWidget	request = (DviWidget) wrequest;
    DviWidget	new     = (DviWidget) wnew;
    Boolean	redisplay = FALSE;
    char	*new_map;
    int		cur, req;

    req = request->dvi.requested_page;
    cur = current->dvi.requested_page;
    if (cur != req) {
	    if (req < 1)
		req = 1;
	    if (request->dvi.file)
	    {
		if (current->dvi.last_page != 0 &&
		    req > current->dvi.last_page)
			req = current->dvi.last_page;
	    }
	    if (cur != req)
		redisplay = TRUE;
	    new->dvi.requested_page = req;
    }
    
    if (current->dvi.font_map_string != request->dvi.font_map_string) {
	    new_map = XtMalloc (strlen (request->dvi.font_map_string) + 1);
	    if (new_map) {
		    redisplay = TRUE;
		    strcpy (new_map, request->dvi.font_map_string);
		    new->dvi.font_map_string = new_map;
		    if (current->dvi.font_map_string)
			    XtFree (current->dvi.font_map_string);
		    current->dvi.font_map_string = 0;
		    ParseFontMap (new);
	    }
    }
    if (current->dvi.screen_resolution != request->dvi.screen_resolution)
    {
	ResetFonts (new);
	new->dvi.line_width = -1;
    }
    if (request->dvi.device_resolution)
	new->dvi.scale = ((double) request->dvi.screen_resolution) /
			     ((double) request->dvi.device_resolution);
    if (current->dvi.page_width !=  request->dvi.page_width ||
	current->dvi.page_height != request->dvi.page_height ||
	current->dvi.screen_resolution != request->dvi.screen_resolution)
    {
	RequestDesiredSize (new);
	redisplay = TRUE;
    }
    return redisplay;
}

/*
 * use the set_values_hook entry to check when
 * the file is set
 */

static Boolean
SetValuesHook (widget, args, num_argsp)
	Widget		widget;
	ArgList		args;
	Cardinal	*num_argsp;
{
	DviWidget	dw = (DviWidget) widget;
	Cardinal	i;

	for (i = 0; i < *num_argsp; i++) {
		if (!strcmp (args[i].name, XtNfile)) {
			CloseFile (dw);
			OpenFile (dw);
			return TRUE;
		}
	}
	return FALSE;
}

static void
CloseFile (dw)
	DviWidget	dw;
{
    if (dw->dvi.tmpFile)
	fclose (dw->dvi.tmpFile);
    ForgetPagePositions (dw);
}

static void
OpenFile (dw)
	DviWidget	dw;
{
    char	tmpName[sizeof ("/tmp/dviXXXXXX")];
#ifdef HAS_MKSTEMP
    int fd;
#endif

    dw->dvi.tmpFile = 0;
    if (!dw->dvi.seek) {
	strcpy (tmpName, "/tmp/dviXXXXXX");
#ifndef HAS_MKSTEMP
	mktemp (tmpName);
	dw->dvi.tmpFile = fopen (tmpName, "w+");
#else
	fd = mkstemp(tmpName);
	dw->dvi.tmpFile = fdopen(fd, "w+");
#endif
	unlink (tmpName);
    }
    if (dw->dvi.requested_page < 1)
	dw->dvi.requested_page = 1;
    dw->dvi.last_page = 0;
}

static XtGeometryResult
QueryGeometry (w, request, geometry_return)
	Widget			w;
	XtWidgetGeometry	*request, *geometry_return;
{
	XtGeometryResult	ret;
	DviWidget		dw = (DviWidget) w;

	ret = XtGeometryYes;
	if ((int)request->width < dw->dvi.desired_width
	    || (int)request->height < dw->dvi.desired_height)
		ret = XtGeometryAlmost;
	geometry_return->width = dw->dvi.desired_width;
	geometry_return->height = dw->dvi.desired_height;
	geometry_return->request_mode = CWWidth|CWHeight;
	return ret;
}

void
SetDeviceResolution (dw, resolution)
	DviWidget   dw;
	int	    resolution;
{
    if (resolution != dw->dvi.device_resolution) {
	dw->dvi.device_resolution = resolution;
	dw->dvi.scale = ((double)  dw->dvi.screen_resolution) /
			((double) resolution);
    }
}

static void
ShowDvi (dw)
	DviWidget	dw;
{
	int	i;
	long	file_position;

	if (!dw->dvi.file) 
	  return;

	if (dw->dvi.requested_page < 1)
		dw->dvi.requested_page = 1;

	if (dw->dvi.last_page != 0 && dw->dvi.requested_page > dw->dvi.last_page)
		dw->dvi.requested_page = dw->dvi.last_page;

	file_position = SearchPagePosition (dw, dw->dvi.requested_page);
	if (file_position != -1) {
		FileSeek(dw, file_position);
		dw->dvi.current_page = dw->dvi.requested_page;
	} else {
		for (i=dw->dvi.requested_page; i > 0; i--) {
			file_position = SearchPagePosition (dw, i);
			if (file_position != -1)
				break;
		}
		if (file_position == -1)
			file_position = 0;
		FileSeek (dw, file_position);

		dw->dvi.current_page = i;
		
		dw->dvi.display_enable = 0;
		while (dw->dvi.current_page != dw->dvi.requested_page) {
			dw->dvi.current_page = ParseInput (dw);
			/*
			 * at EOF, seek back to the begining of this page.
			 */
			if (feof (dw->dvi.file)) {
				file_position = SearchPagePosition (dw,
						dw->dvi.current_page);
				if (file_position != -1)
					FileSeek (dw, file_position);
				break;
			}
		}
	}
	
	dw->dvi.display_enable = 1;
	ParseInput (dw);
	if (dw->dvi.last_page && dw->dvi.requested_page > dw->dvi.last_page)
		dw->dvi.requested_page = dw->dvi.last_page;
}