gdk.c 10.5 KB
Newer Older
Elliot Lee's avatar
Elliot Lee committed
1 2 3 4
/* GDK - The GIMP Drawing Kit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
5
 * modify it under the terms of the GNU Lesser General Public
Elliot Lee's avatar
Elliot Lee committed
6 7 8 9 10
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
12
 * Lesser General Public License for more details.
Elliot Lee's avatar
Elliot Lee committed
13
 *
14
 * You should have received a copy of the GNU Lesser General Public
15 16 17
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
Elliot Lee's avatar
Elliot Lee committed
18
 */
19 20

/*
21
 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
22 23 24 25 26
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
 */

27
#include "config.h"
Elliot Lee's avatar
Elliot Lee committed
28 29

#include <string.h>
30
#include <stdlib.h>
Elliot Lee's avatar
Elliot Lee committed
31

Owen Taylor's avatar
Started  
Owen Taylor committed
32
#include "gdk.h"
33
#include "gdkinternals.h"
Elliot Lee's avatar
Elliot Lee committed
34

35 36 37 38
#ifndef HAVE_XCONVERTCASE
#include "gdkkeysyms.h"
#endif

Elliot Lee's avatar
Elliot Lee committed
39 40 41 42 43 44 45 46 47 48
typedef struct _GdkPredicate  GdkPredicate;

struct _GdkPredicate
{
  GdkEventFunc func;
  gpointer data;
};

/* Private variable declarations
 */
49
static int gdk_initialized = 0;			    /* 1 if the library is initialized,
Elliot Lee's avatar
Elliot Lee committed
50 51 52
						     * 0 otherwise.
						     */

53 54
static gchar  *gdk_progclass = NULL;

55
#ifdef G_ENABLE_DEBUG
56
static const GDebugKey gdk_debug_keys[] = {
57 58 59
  {"events",	    GDK_DEBUG_EVENTS},
  {"misc",	    GDK_DEBUG_MISC},
  {"dnd",	    GDK_DEBUG_DND},
Jacob Berkman's avatar
Jacob Berkman committed
60 61
  {"xim",	    GDK_DEBUG_XIM},
  {"nograbs",       GDK_DEBUG_NOGRABS},
62
};
63 64 65

static const int gdk_ndebug_keys = sizeof(gdk_debug_keys)/sizeof(GDebugKey);

66
#endif /* G_ENABLE_DEBUG */
Elliot Lee's avatar
Elliot Lee committed
67

68
static GdkArgContext *
69 70 71 72 73 74 75 76 77
gdk_arg_context_new (gpointer cb_data)
{
  GdkArgContext *result = g_new (GdkArgContext, 1);
  result->tables = g_ptr_array_new ();
  result->cb_data = cb_data;

  return result;
}

78
static void
79 80 81 82 83 84
gdk_arg_context_destroy (GdkArgContext *context)
{
  g_ptr_array_free (context->tables, TRUE);
  g_free (context);
}

85
static void
86 87 88 89 90
gdk_arg_context_add_table (GdkArgContext *context, GdkArgDesc *table)
{
  g_ptr_array_add (context->tables, table);
}

91
static void
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
gdk_arg_context_parse (GdkArgContext *context, gint *argc, gchar ***argv)
{
  int i, j, k;

  /* Save a copy of the original argc and argv */
  if (argc && argv)
    {
      for (i = 1; i < *argc; i++)
	{
	  char *arg;
	  
	  if (!(*argv)[i][0] == '-' && (*argv)[i][1] == '-')
	    continue;
	  
	  arg = (*argv)[i] + 2;

	  /* '--' terminates list of arguments */
	  if (arg == 0)
	    {
	      (*argv)[i] = NULL;
	      break;
	    }
	      
	  for (j = 0; j < context->tables->len; j++)
	    {
	      GdkArgDesc *table = context->tables->pdata[j];
	      for (k = 0; table[k].name; k++)
		{
		  switch (table[k].type)
		    {
		    case GDK_ARG_STRING:
		    case GDK_ARG_CALLBACK:
		    case GDK_ARG_INT:
		      {
			int len = strlen (table[k].name);
			
			if (strncmp (arg, table[k].name, len) == 0 &&
129
			    (arg[len] == '=' || arg[len] == 0))
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
			  {
			    char *value = NULL;

			    (*argv)[i] = NULL;

			    if (arg[len] == '=')
			      value = arg + len + 1;
			    else if (i < *argc - 1)
			      {
				value = (*argv)[i + 1];
				(*argv)[i+1] = NULL;
				i++;
			      }
			    else
			      value = "";

			    switch (table[k].type)
			      {
			      case GDK_ARG_STRING:
				*(gchar **)table[k].location = g_strdup (value);
				break;
			      case GDK_ARG_INT:
				*(gint *)table[k].location = atoi (value);
				break;
			      case GDK_ARG_CALLBACK:
				(*table[k].callback)(table[k].name, value, context->cb_data);
				break;
			      default:
158
				;
159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177
			      }

			    goto next_arg;
			  }
			break;
		      }
		    case GDK_ARG_BOOL:
		    case GDK_ARG_NOBOOL:
		      if (strcmp (arg, table[k].name) == 0)
			{
			  (*argv)[i] = NULL;
			  
			  *(gboolean *)table[k].location = (table[k].type == GDK_ARG_BOOL) ? TRUE : FALSE;
			  goto next_arg;
			}
		    }
		}
	    }
	next_arg:
178
	  ;
179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197
	}
	  
      for (i = 1; i < *argc; i++)
	{
	  for (k = i; k < *argc; k++)
	    if ((*argv)[k] != NULL)
	      break;
	  
	  if (k > i)
	    {
	      k -= i;
	      for (j = i + k; j < *argc; j++)
		(*argv)[j-k] = (*argv)[j];
	      *argc -= k;
	    }
	}
    }
}

198
#ifdef G_ENABLE_DEBUG
199 200 201
static void
gdk_arg_debug_cb (const char *key, const char *value, gpointer user_data)
{
202 203 204
  _gdk_debug_flags |= g_parse_debug_string (value,
					    (GDebugKey *) gdk_debug_keys,
					    gdk_ndebug_keys);
205 206 207 208 209
}

static void
gdk_arg_no_debug_cb (const char *key, const char *value, gpointer user_data)
{
210 211 212
  _gdk_debug_flags &= ~g_parse_debug_string (value,
					     (GDebugKey *) gdk_debug_keys,
					     gdk_ndebug_keys);
213
}
214
#endif /* G_ENABLE_DEBUG */
215

216 217 218 219 220 221
static void
gdk_arg_class_cb (const char *key, const char *value, gpointer user_data)
{
  gdk_set_program_class (value);
}

222 223 224 225 226 227 228
static void
gdk_arg_name_cb (const char *key, const char *value, gpointer user_data)
{
  g_set_prgname (value);
}

static GdkArgDesc gdk_args[] = {
229 230
  { "class" ,       GDK_ARG_CALLBACK, NULL, gdk_arg_class_cb    },
  { "name",         GDK_ARG_CALLBACK, NULL, gdk_arg_name_cb     },
231 232 233 234 235 236 237
#ifdef G_ENABLE_DEBUG
  { "gdk-debug",    GDK_ARG_CALLBACK, NULL, gdk_arg_debug_cb    },
  { "gdk-no-debug", GDK_ARG_CALLBACK, NULL, gdk_arg_no_debug_cb },
#endif /* G_ENABLE_DEBUG */
  { NULL }
};

Elliot Lee's avatar
Elliot Lee committed
238 239
/*
 *--------------------------------------------------------------
240
 * gdk_init_check
Elliot Lee's avatar
Elliot Lee committed
241 242 243 244 245 246 247 248 249 250
 *
 *   Initialize the library for use.
 *
 * Arguments:
 *   "argc" is the number of arguments.
 *   "argv" is an array of strings.
 *
 * Results:
 *   "argc" and "argv" are modified to reflect any arguments
 *   which were not handled. (Such arguments should either
251 252
 *   be handled by the application or dismissed). If initialization
 *   fails, returns FALSE, otherwise TRUE.
Elliot Lee's avatar
Elliot Lee committed
253 254 255 256 257 258 259
 *
 * Side effects:
 *   The library is initialized.
 *
 *--------------------------------------------------------------
 */

260
gboolean
261
gdk_init_check (int    *argc,
262
		char ***argv)
Elliot Lee's avatar
Elliot Lee committed
263
{
264 265
  gchar **argv_orig = NULL;
  gint argc_orig = 0;
266 267 268
  GdkArgContext *arg_context;
  gboolean result;
  int i;
269
  
270
  if (gdk_initialized)
271
    return TRUE;
272

273 274 275 276 277 278 279 280
  if (argc && argv)
    {
      argc_orig = *argc;
      
      argv_orig = g_malloc ((argc_orig + 1) * sizeof (char*));
      for (i = 0; i < argc_orig; i++)
	argv_orig[i] = g_strdup ((*argv)[i]);
      argv_orig[argc_orig] = NULL;
281

Elliot Lee's avatar
Elliot Lee committed
282
      if (*argc > 0)
283 284
	{
	  gchar *d;
285
	  
286
	  d = strrchr((*argv)[0], G_DIR_SEPARATOR);
287
	  if (d != NULL)
288
	    g_set_prgname (d + 1);
289
	  else
290
	    g_set_prgname ((*argv)[0]);
291
	}
Elliot Lee's avatar
Elliot Lee committed
292
    }
293 294 295 296
  else
    {
      g_set_prgname ("<unknown>");
    }
297
  
298 299 300 301 302 303 304
  /* We set the fallback program class here, rather than lazily in
   * gdk_get_program_class, since we don't want -name to override it.
   */
  gdk_progclass = g_strdup (g_get_prgname ());
  if (gdk_progclass[0])
    gdk_progclass[0] = g_ascii_toupper (gdk_progclass[0]);  
  
305 306 307 308
#ifdef G_ENABLE_DEBUG
  {
    gchar *debug_string = getenv("GDK_DEBUG");
    if (debug_string != NULL)
309
      _gdk_debug_flags = g_parse_debug_string (debug_string,
310 311 312 313
					      (GDebugKey *) gdk_debug_keys,
					      gdk_ndebug_keys);
  }
#endif	/* G_ENABLE_DEBUG */
314
  
315 316 317 318 319
  arg_context = gdk_arg_context_new (NULL);
  gdk_arg_context_add_table (arg_context, gdk_args);
  gdk_arg_context_add_table (arg_context, _gdk_windowing_args);
  gdk_arg_context_parse (arg_context, argc, argv);
  gdk_arg_context_destroy (arg_context);
320
  
321 322
  GDK_NOTE (MISC, g_message ("progname: \"%s\"", g_get_prgname ()));

Owen Taylor's avatar
Owen Taylor committed
323
  g_type_init ();
324
  
325 326
  result = _gdk_windowing_init_check (argc_orig, argv_orig);

327 328 329
  for (i = 0; i < argc_orig; i++)
    g_free(argv_orig[i]);
  g_free(argv_orig);
330 331 332

  if (!result)
    return FALSE;
333
  
334
  _gdk_visual_init ();
335 336
  _gdk_windowing_window_init ();
  _gdk_windowing_image_init ();
337 338 339
  _gdk_events_init ();
  _gdk_input_init ();
  _gdk_dnd_init ();
340

341
  gdk_initialized = 1;
342 343 344 345 346 347 348 349 350 351 352 353

  return TRUE;
}

void
gdk_init (int *argc, char ***argv)
{
  if (!gdk_init_check (argc, argv))
    {
      g_warning ("cannot open display: %s", gdk_get_display ());
      exit(1);
    }
Elliot Lee's avatar
Elliot Lee committed
354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375
}

/*
 *--------------------------------------------------------------
 * gdk_exit
 *
 *   Restores the library to an un-itialized state and exits
 *   the program using the "exit" system call.
 *
 * Arguments:
 *   "errorcode" is the error value to pass to "exit".
 *
 * Results:
 *   Allocated structures are freed and the program exits
 *   cleanly.
 *
 * Side effects:
 *
 *--------------------------------------------------------------
 */

void
Tor Lillqvist's avatar
Tor Lillqvist committed
376
gdk_exit (gint errorcode)
Elliot Lee's avatar
Elliot Lee committed
377
{
378 379 380
  /* de-initialisation is done by the gdk_exit_funct(),
     no need to do this here (Alex J.) */
  exit (errorcode);
Elliot Lee's avatar
Elliot Lee committed
381 382
}

383 384 385 386 387 388 389
#if 0

/* This is disabled, but the code isn't removed, because we might
 * want to have some sort of explicit way to shut down GDK cleanly
 * at some point in the future.
 */

Elliot Lee's avatar
Elliot Lee committed
390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407
/*
 *--------------------------------------------------------------
 * gdk_exit_func
 *
 *   This is the "atexit" function that makes sure the
 *   library gets a chance to cleanup.
 *
 * Arguments:
 *
 * Results:
 *
 * Side effects:
 *   The library is un-initialized and the program exits.
 *
 *--------------------------------------------------------------
 */

static void
408
gdk_exit_func (void)
Elliot Lee's avatar
Elliot Lee committed
409
{
410
  static gboolean in_gdk_exit_func = FALSE;
411
  
412 413
  /* This is to avoid an infinite loop if a program segfaults in
     an atexit() handler (and yes, it does happen, especially if a program
414
     has trounced over memory too badly for even g_message to work) */
415 416
  if (in_gdk_exit_func == TRUE)
    return;
417
  in_gdk_exit_func = TRUE;
418
  
419
  if (gdk_initialized)
Elliot Lee's avatar
Elliot Lee committed
420
    {
421 422
      _gdk_image_exit ();
      _gdk_input_exit ();
423

424
      _gdk_windowing_exit ();
425
      
426
      gdk_initialized = 0;
Elliot Lee's avatar
Elliot Lee committed
427 428 429
    }
}

430 431
#endif

432 433 434 435 436 437 438 439 440 441 442 443
void
gdk_threads_enter ()
{
  GDK_THREADS_ENTER ();
}

void
gdk_threads_leave ()
{
  GDK_THREADS_LEAVE ();
}

444 445 446 447 448
/**
 * gdk_threads_init:
 * 
 * Initializes GDK so that it can be used from multiple threads
 * in conjunction with gdk_threads_enter() and gdk_threads_leave().
449
 * g_thread_init() must be called previous to this function.
450 451 452 453 454 455 456 457
 *
 * This call must be made before any use of the main loop from
 * GTK+; to be safe, call it before gtk_init().
 **/
void
gdk_threads_init ()
{
  if (!g_thread_supported ())
458
    g_error ("g_thread_init() must be called before gdk_threads_init()");
459 460 461 462

  gdk_threads_mutex = g_mutex_new ();
}

463 464 465 466 467 468 469 470 471 472 473 474 475 476
G_CONST_RETURN char *
gdk_get_program_class (void)
{
  return gdk_progclass;
}

void
gdk_set_program_class (const char *program_class)
{
  if (gdk_progclass)
    g_free (gdk_progclass);

  gdk_progclass = g_strdup (program_class);
}