aboutsummaryrefslogtreecommitdiff
path: root/libjava/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkToolkit.c
blob: 8cb9e2f5d68c31cb2ed53b92e6775f9ab409fad3 (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
/* gtktoolkit.c -- Native portion of GtkToolkit
   Copyright (C) 1998, 1999 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */


#include "gtkpeer.h"
#include "gnu_java_awt_peer_gtk_GtkToolkit.h"
#include "gthread-jni.h"

#include <sys/time.h>

#ifdef JVM_SUN
  struct state_table *native_state_table;
  struct state_table *native_global_ref_table;
#endif

jmethodID setBoundsCallbackID;

jmethodID postActionEventID;
jmethodID postMenuActionEventID;
jmethodID postMouseEventID;
jmethodID postConfigureEventID;
jmethodID postExposeEventID;
jmethodID postKeyEventID;
jmethodID postFocusEventID;
jmethodID postAdjustmentEventID;
jmethodID postItemEventID;
jmethodID choicePostItemEventID;
jmethodID postListItemEventID;
jmethodID postTextEventID;
jmethodID postWindowEventID;
jmethodID postInsetsChangedEventID;
jmethodID windowGetWidthID;
jmethodID windowGetHeightID;

jmethodID beginNativeRepaintID;
jmethodID endNativeRepaintID;

jmethodID initComponentGraphicsID;
jmethodID initComponentGraphics2DID;
jmethodID setCursorID;

JavaVM *java_vm;

union env_union
{
  void *void_env;
  JNIEnv *jni_env;
};

JNIEnv *
gdk_env()
{
  union env_union tmp;
  g_assert((*java_vm)->GetEnv(java_vm, &tmp.void_env, JNI_VERSION_1_2) == JNI_OK);
  return tmp.jni_env;
}


GtkWindowGroup *global_gtk_window_group;

static void init_glib_threads(JNIEnv *, jint);

double dpi_conversion_factor;

static void init_dpi_conversion_factor (void);
static void dpi_changed_cb (GtkSettings  *settings,
                            GParamSpec   *pspec);

/*
 * Call gtk_init.  It is very important that this happen before any other
 * gtk calls.
 *
 * The portableNativeSync argument may have the values:
 *   1 if the Java property gnu.classpath.awt.gtk.portable.native.sync
 *     is set to "true".  
 *   0 if it is set to "false"
 *  -1 if unset.
 */


JNIEXPORT void JNICALL 
Java_gnu_java_awt_peer_gtk_GtkToolkit_gtkInit (JNIEnv *env, 
					       jclass clazz __attribute__((unused)),
					       jint portableNativeSync)
{
  int argc = 1;
  char **argv;
  char *homedir, *rcpath = NULL;

  jclass gtkgenericpeer, gtkcomponentpeer, gtkchoicepeer, gtkwindowpeer, gtkscrollbarpeer, gtklistpeer,
    gtkmenuitempeer, gtktextcomponentpeer, window, gdkgraphics, gdkgraphics2d;

  gtkgenericpeer = (*env)->FindClass(env, "gnu/java/awt/peer/gtk/GtkGenericPeer");

  NSA_INIT (env, gtkgenericpeer);

  g_assert((*env)->GetJavaVM(env, &java_vm) == 0);

  /* GTK requires a program's argc and argv variables, and requires that they
     be valid.   Set it up. */
  argv = (char **) g_malloc (sizeof (char *) * 2);
  argv[0] = (char *) g_malloc(1);
#if 1
  strcpy(argv[0], "");
#else  /* The following is a more efficient alternative, but less intuitively
	* expresses what we are trying to do.   This code is only run once, so
	* I'm going for intuitive. */
  argv[0][0] = '\0';
#endif
  argv[1] = NULL;

  init_glib_threads(env, portableNativeSync);

  /* From GDK 2.0 onwards we have to explicitly call gdk_threads_init */
  gdk_threads_init();

  gtk_init (&argc, &argv);

  gdk_rgb_init ();
  gtk_widget_set_default_colormap (gdk_rgb_get_cmap ());
  gtk_widget_set_default_visual (gdk_rgb_get_visual ());

  /* Make sure queued calls don't get sent to GTK/GDK while 
     we're shutting down. */
  atexit (gdk_threads_enter);

  gdk_event_handler_set ((GdkEventFunc)awt_event_handler, NULL, NULL);

  if ((homedir = getenv ("HOME")))
    {
      rcpath = (char *) g_malloc (strlen (homedir) + strlen (RC_FILE) + 2);
      sprintf (rcpath, "%s/%s", homedir, RC_FILE);
    }
  
  gtk_rc_parse ((rcpath) ? rcpath : RC_FILE);

  g_free (rcpath);
  g_free (argv[0]);
  g_free (argv);

  /* setup cached IDs for posting GTK events to Java */

  window = (*env)->FindClass (env, "java/awt/Window");

  gtkcomponentpeer = (*env)->FindClass (env,
				     "gnu/java/awt/peer/gtk/GtkComponentPeer");
  gtkchoicepeer = (*env)->FindClass (env,
				     "gnu/java/awt/peer/gtk/GtkChoicePeer");
  gtkwindowpeer = (*env)->FindClass (env,
				     "gnu/java/awt/peer/gtk/GtkWindowPeer");
  gtkscrollbarpeer = (*env)->FindClass (env, 
				     "gnu/java/awt/peer/gtk/GtkScrollbarPeer");
  gtklistpeer = (*env)->FindClass (env, "gnu/java/awt/peer/gtk/GtkListPeer");
  gtkmenuitempeer = (*env)->FindClass (env,
                                     "gnu/java/awt/peer/gtk/GtkMenuItemPeer");
  gtktextcomponentpeer = (*env)->FindClass (env,
                                     "gnu/java/awt/peer/gtk/GtkTextComponentPeer");
  gdkgraphics = (*env)->FindClass (env,
                                   "gnu/java/awt/peer/gtk/GdkGraphics");
  gdkgraphics2d = (*env)->FindClass (env,
                                     "gnu/java/awt/peer/gtk/GdkGraphics2D");
  setBoundsCallbackID = (*env)->GetMethodID (env, window,
					     "setBoundsCallback",
					     "(IIII)V");

  postMenuActionEventID = (*env)->GetMethodID (env, gtkmenuitempeer,
					       "postMenuActionEvent",
					       "()V");
  postMouseEventID = (*env)->GetMethodID (env, gtkcomponentpeer, 
                                          "postMouseEvent", "(IJIIIIZ)V");
  setCursorID = (*env)->GetMethodID (env, gtkcomponentpeer,
                                     "setCursor", "()V");
  beginNativeRepaintID = (*env)->GetMethodID (env, gtkcomponentpeer, 
                                              "beginNativeRepaint", "()V");

  endNativeRepaintID = (*env)->GetMethodID (env, gtkcomponentpeer, 
                                            "endNativeRepaint", "()V");

  postConfigureEventID = (*env)->GetMethodID (env, gtkwindowpeer, 
					      "postConfigureEvent", "(IIII)V");
  postWindowEventID = (*env)->GetMethodID (env, gtkwindowpeer,
					   "postWindowEvent",
					   "(ILjava/awt/Window;I)V");
  postInsetsChangedEventID = (*env)->GetMethodID (env, gtkwindowpeer,
						  "postInsetsChangedEvent",
						  "(IIII)V");
  windowGetWidthID = (*env)->GetMethodID (env, gtkwindowpeer,
					  "getWidth", "()I");
  windowGetHeightID = (*env)->GetMethodID (env, gtkwindowpeer,
					  "getHeight", "()I");

  postExposeEventID = (*env)->GetMethodID (env, gtkcomponentpeer, 
					  "postExposeEvent", "(IIII)V");
  postKeyEventID = (*env)->GetMethodID (env, gtkcomponentpeer,
					"postKeyEvent", "(IJIICI)V");
  postFocusEventID = (*env)->GetMethodID (env, gtkcomponentpeer,
					  "postFocusEvent", "(IZ)V");
  postAdjustmentEventID = (*env)->GetMethodID (env, gtkscrollbarpeer,
					       "postAdjustmentEvent", 
					       "(II)V");
  postItemEventID = (*env)->GetMethodID (env, gtkcomponentpeer,
					 "postItemEvent", 
					 "(Ljava/lang/Object;I)V");
  choicePostItemEventID = (*env)->GetMethodID (env, gtkchoicepeer,
					 "choicePostItemEvent", 
					 "(Ljava/lang/String;I)V");
  postListItemEventID = (*env)->GetMethodID (env, gtklistpeer,
					     "postItemEvent",
					     "(II)V");
  postTextEventID = (*env)->GetMethodID (env, gtktextcomponentpeer,
					     "postTextEvent",
					     "()V");
  initComponentGraphicsID = (*env)->GetMethodID (env, gdkgraphics,
                                                 "initComponentGraphics",
                                                 "()V");
  initComponentGraphics2DID = (*env)->GetMethodID (env, gdkgraphics2d,
                                                   "initComponentGraphics2D",
                                                   "()V");
  global_gtk_window_group = gtk_window_group_new ();

  init_dpi_conversion_factor ();
}


/** Initialize GLIB's threads properly, based on the value of the
    gnu.classpath.awt.gtk.portable.native.sync Java system property.  If
    that's unset, use the PORTABLE_NATIVE_SYNC config.h macro.  (TODO: 
    In some release following 0.10, that config.h macro will go away.)
    */ 
static void 
init_glib_threads(JNIEnv *env, jint portableNativeSync)
{
  if (portableNativeSync < 0)
    {
#ifdef PORTABLE_NATIVE_SYNC /* Default value, if not set by the Java system
                               property */ 
      portableNativeSync = 1;
#else
      portableNativeSync = 0;
#endif
    }
  
  (*env)->GetJavaVM( env, &the_vm );
  if (portableNativeSync)
    g_thread_init ( &portable_native_sync_jni_functions );
  else
    g_thread_init ( NULL );

  /* Debugging progress message; uncomment if needed: */
  /*   printf("called gthread init\n"); */
}


/* This is a big hack, needed until this pango bug is resolved:
   http://bugzilla.gnome.org/show_bug.cgi?id=119081.
   See: http://mail.gnome.org/archives/gtk-i18n-list/2003-August/msg00001.html
   for details. */
static void
init_dpi_conversion_factor ()
{
  GtkSettings *settings = gtk_settings_get_default ();
  GObjectClass *klass;

  klass = G_OBJECT_CLASS (GTK_SETTINGS_GET_CLASS (settings));
  if (g_object_class_find_property (klass, "gtk-xft-dpi"))
    {
      int int_dpi;
      g_object_get (settings, "gtk-xft-dpi", &int_dpi, NULL);
      /* If int_dpi == -1 gtk-xft-dpi returns the default value. So we
	 have to do approximate calculation here.  */
      if (int_dpi < 0)
	dpi_conversion_factor = PANGO_SCALE * 72.0 / 96.;
      else
	dpi_conversion_factor = PANGO_SCALE * 72.0 / (int_dpi / PANGO_SCALE);

      g_signal_connect (settings, "notify::gtk-xft-dpi",
			G_CALLBACK (dpi_changed_cb), NULL);
    }
  else
    /* Approximate. */
    dpi_conversion_factor = PANGO_SCALE * 72.0 / 96.;
}

static void
dpi_changed_cb (GtkSettings  *settings,
		GParamSpec *pspec __attribute__((unused)))
{
  int int_dpi;
  g_object_get (settings, "gtk-xft-dpi", &int_dpi, NULL);
  if (int_dpi < 0)
    dpi_conversion_factor = PANGO_SCALE * 72.0 / 96.;
  else
    dpi_conversion_factor = PANGO_SCALE * 72.0 / (int_dpi / PANGO_SCALE);
}

static int
within_human_latency_tolerance(struct timeval *init)
{
  struct timeval curr;
  unsigned long milliseconds_elapsed;

  gettimeofday(&curr, NULL);
  
  milliseconds_elapsed = (((curr.tv_sec * 1000) + (curr.tv_usec / 1000))
			  - ((init->tv_sec * 1000) + (init->tv_usec / 1000)));
  
  return milliseconds_elapsed < 100;
}


JNIEXPORT void JNICALL 
Java_gnu_java_awt_peer_gtk_GtkToolkit_iterateNativeQueue
(JNIEnv *env, 
 jobject self __attribute__((unused)),
 jobject lockedQueue,
 jboolean block)
{
  /* We're holding an EventQueue lock, and we're about to acquire the GDK
   * lock before dropping the EventQueue lock. This can deadlock if someone
   * holds the GDK lock and wants to acquire the EventQueue lock; however
   * all callbacks from GTK happen with the GDK lock released, so this
   * would only happen in an odd case such as some JNI helper code
   * acquiring the GDK lock and calling back into
   * EventQueue.getNextEvent().
   */

  struct timeval init;
  gettimeofday(&init, NULL);

  gdk_threads_enter ();
  (*env)->MonitorExit (env, lockedQueue);

  if (block)
    {
      
      /* If we're blocking-when-empty, we want a do .. while loop. */
      do 
	gtk_main_iteration ();
      while (within_human_latency_tolerance (&init) 
	     && gtk_events_pending ());
    }
  else
    {
      /* If we're not blocking-when-empty, we want a while loop. */
      while (within_human_latency_tolerance (&init) 
	     && gtk_events_pending ())
	gtk_main_iteration ();      
    }
  
  (*env)->MonitorEnter (env, lockedQueue);
  gdk_threads_leave ();
}

JNIEXPORT void JNICALL 
Java_gnu_java_awt_peer_gtk_GtkToolkit_wakeNativeQueue
  (JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)))
{
  g_main_context_wakeup (NULL);
}

JNIEXPORT jboolean JNICALL 
Java_gnu_java_awt_peer_gtk_GtkToolkit_nativeQueueEmpty
  (JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)))
{
  jboolean empty = FALSE;
  gdk_threads_enter ();
  empty = ! gtk_events_pending();
  gdk_threads_leave ();
  return empty;
}


static jint gdk_color_to_java_color (GdkColor color);


JNIEXPORT void JNICALL 
Java_gnu_java_awt_peer_gtk_GtkToolkit_beep
  (JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)))
{
  gdk_threads_enter ();
  gdk_beep ();
  gdk_threads_leave ();
}

JNIEXPORT void JNICALL 
Java_gnu_java_awt_peer_gtk_GtkToolkit_sync
  (JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)))
{
  gdk_threads_enter ();
  gdk_flush ();
  gdk_threads_leave ();
}

JNIEXPORT void JNICALL 
Java_gnu_java_awt_peer_gtk_GtkToolkit_getScreenSizeDimensions
  (JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)),
   jintArray jdims)
{
  jint *dims = (*env)->GetIntArrayElements (env, jdims, 0);  

  gdk_threads_enter ();

  dims[0] = gdk_screen_width ();
  dims[1] = gdk_screen_height ();

  gdk_threads_leave ();

  (*env)->ReleaseIntArrayElements(env, jdims, dims, 0);
}

JNIEXPORT jint JNICALL 
Java_gnu_java_awt_peer_gtk_GtkToolkit_getScreenResolution
  (JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)))
{
  jint res;

  gdk_threads_enter ();

  res = gdk_screen_width () / (gdk_screen_width_mm () / 25.4);

  gdk_threads_leave ();
  return res;
}

#define CONVERT(type, state) \
  gdk_color_to_java_color (style->type[GTK_STATE_ ## state])

JNIEXPORT void JNICALL
Java_gnu_java_awt_peer_gtk_GtkToolkit_loadSystemColors
  (JNIEnv *env, jobject obj __attribute__((unused)),
   jintArray jcolors)
{
  jint *colors;
  GtkStyle *style;

  colors = (*env)->GetIntArrayElements (env, jcolors, 0);

  gdk_threads_enter ();

  style = gtk_widget_get_default_style ();

  colors[AWT_DESKTOP]                 = CONVERT (bg, SELECTED);
  colors[AWT_ACTIVE_CAPTION]          = CONVERT (bg, SELECTED);
  colors[AWT_ACTIVE_CAPTION_TEXT]     = CONVERT (text, SELECTED);
  colors[AWT_ACTIVE_CAPTION_BORDER]   = CONVERT (fg, NORMAL);
  colors[AWT_INACTIVE_CAPTION]        = CONVERT (base, INSENSITIVE);
  colors[AWT_INACTIVE_CAPTION_TEXT]   = CONVERT (fg, INSENSITIVE);
  colors[AWT_INACTIVE_CAPTION_BORDER] = CONVERT (fg, INSENSITIVE);
  colors[AWT_WINDOW]                  = CONVERT (bg, NORMAL);
  colors[AWT_WINDOW_BORDER]           = CONVERT (fg, NORMAL);
  colors[AWT_WINDOW_TEXT]             = CONVERT (fg, NORMAL);
  colors[AWT_MENU]                    = CONVERT (bg, NORMAL);
  colors[AWT_MENU_TEXT]               = CONVERT (fg, NORMAL);
  colors[AWT_TEXT]                    = CONVERT (bg, NORMAL);
  colors[AWT_TEXT_TEXT]               = CONVERT (fg, NORMAL);
  colors[AWT_TEXT_HIGHLIGHT]          = CONVERT (bg, SELECTED);
  colors[AWT_TEXT_HIGHLIGHT_TEXT]     = CONVERT (fg, SELECTED);
  colors[AWT_TEXT_INACTIVE_TEXT]      = CONVERT (bg, INSENSITIVE);
  colors[AWT_CONTROL]                 = CONVERT (bg, NORMAL);
  colors[AWT_CONTROL_TEXT]            = CONVERT (fg, NORMAL);
  colors[AWT_CONTROL_HIGHLIGHT]       = CONVERT (base, ACTIVE);
  colors[AWT_CONTROL_LT_HIGHLIGHT]    = CONVERT (bg, PRELIGHT);
  colors[AWT_CONTROL_SHADOW]          = CONVERT (bg, ACTIVE);
  colors[AWT_CONTROL_DK_SHADOW]       = CONVERT (fg, INSENSITIVE);
  colors[AWT_SCROLLBAR]               = CONVERT (base, INSENSITIVE);
  colors[AWT_INFO]                    = CONVERT (bg, NORMAL);
  colors[AWT_INFO_TEXT]               = CONVERT (fg, NORMAL);

  gdk_threads_leave ();

  (*env)->ReleaseIntArrayElements(env, jcolors, colors, 0);
}

#undef CONVERT

static jint
gdk_color_to_java_color (GdkColor gdk_color)
{
  guchar red;
  guchar green;
  guchar blue;
  float factor;

  factor = 255.0 / 65535.0;

  red   = (float) gdk_color.red   * factor;
  green = (float) gdk_color.green * factor;
  blue  = (float) gdk_color.blue  * factor;

  return (jint) (0xff000000 | (red << 16) | (green << 8) | blue);
}