summaryrefslogtreecommitdiffstats
path: root/unix/tkUnixEvent.c
blob: afb3db0a5101c579b156d0612ff67812b2b93a07 (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
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
/*
 * tkUnixEvent.c --
 *
 *	This file implements an event source for X displays for the UNIX
 *	version of Tk.
 *
 * Copyright (c) 1995-1997 Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#include "tkUnixInt.h"
#include <signal.h>
#ifdef HAVE_XKBKEYCODETOKEYSYM
#  include <X11/XKBlib.h>
/* Work around stupid un-const-ified Xkb headers.  Grrrrr.... */
#  define XkbOpenDisplay(D,V,E,M,m,R) \
	(XkbOpenDisplay)((char *)(D),(V),(E),(M),(m),(R))
#else
#  define XkbOpenDisplay(D,V,E,M,m,R) (V),(E),(M),(m),(R),(NULL)
#endif

/*
 * The following static indicates whether this module has been initialized in
 * the current thread.
 */

typedef struct ThreadSpecificData {
    int initialized;
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;

/*
 * Prototypes for functions that are referenced only in this file:
 */

static void		DisplayCheckProc(ClientData clientData, int flags);
static void		DisplayExitHandler(ClientData clientData);
static void		DisplayFileProc(ClientData clientData, int flags);
static void		DisplaySetupProc(ClientData clientData, int flags);
static void		TransferXEventsToTcl(Display *display);
#ifdef TK_USE_INPUT_METHODS
static void		OpenIM(TkDisplay *dispPtr);
#endif

/*
 *----------------------------------------------------------------------
 *
 * TkCreateXEventSource --
 *
 *	This function is called during Tk initialization to create the event
 *	source for X Window events.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	A new event source is created.
 *
 *----------------------------------------------------------------------
 */

void
TkCreateXEventSource(void)
{
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
	    Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    if (!tsdPtr->initialized) {
	tsdPtr->initialized = 1;
	Tcl_CreateEventSource(DisplaySetupProc, DisplayCheckProc, NULL);
	TkCreateExitHandler(DisplayExitHandler, NULL);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * DisplayExitHandler --
 *
 *	This function is called during finalization to clean up the display
 *	module.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static void
DisplayExitHandler(
    ClientData clientData)	/* Not used. */
{
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
	    Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    Tcl_DeleteEventSource(DisplaySetupProc, DisplayCheckProc, NULL);
    tsdPtr->initialized = 0;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpOpenDisplay --
 *
 *	Allocates a new TkDisplay, opens the X display, and establishes the
 *	file handler for the connection.
 *
 * Results:
 *	A pointer to a Tk display structure.
 *
 * Side effects:
 *	Opens a display.
 *
 *----------------------------------------------------------------------
 */

TkDisplay *
TkpOpenDisplay(
    const char *displayNameStr)
{
    TkDisplay *dispPtr;
    Display *display;
    int event = 0;
    int error = 0;
    int major = 1;
    int minor = 0;
    int reason = 0;
    unsigned int use_xkb = 0;
#ifdef TCL_THREADS
    static int xinited = 0;
    TCL_DECLARE_MUTEX(xinitMutex);

    if (!xinited) {
	Tcl_MutexLock(&xinitMutex);
	if (!xinited) {
	    /* Necessary for threaded apps, of no consequence otherwise  */
	    /* need only be called once, but must be called before *any* */
	    /* Xlib call is made.                                        */
	    XInitThreads();
	    xinited = 1;
	}
	Tcl_MutexUnlock(&xinitMutex);
    }
#endif

    /*
    ** Bug [3607830]: Before using Xkb, it must be initialized and confirmed
    **                that the serve supports it.  The XkbOpenDisplay call
    **                will perform this check and return NULL if the extension
    **                is not supported.
    */
    display = XkbOpenDisplay(displayNameStr, &event, &error, &major, &minor, &reason);

    if (display == NULL) {
	/*fprintf(stderr,"event=%d error=%d major=%d minor=%d reason=%d\nDisabling xkb\n",
	event, error, major, minor, reason);*/
	display  = XOpenDisplay(displayNameStr);
    } else {
	use_xkb = TK_DISPLAY_USE_XKB;
	/*fprintf(stderr, "Using xkb %d.%d\n", major, minor);*/
    }

    if (display == NULL) {
	return NULL;
    }
    dispPtr = ckalloc(sizeof(TkDisplay));
    memset(dispPtr, 0, sizeof(TkDisplay));
    dispPtr->display = display;
    dispPtr->flags |= use_xkb;
#ifdef TK_USE_INPUT_METHODS
    OpenIM(dispPtr);
#endif
    Tcl_CreateFileHandler(ConnectionNumber(display), TCL_READABLE,
	    DisplayFileProc, dispPtr);
    return dispPtr;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpCloseDisplay --
 *
 *	Cancels notifier callbacks and closes a display.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Deallocates the displayPtr and unix-specific resources.
 *
 *----------------------------------------------------------------------
 */

void
TkpCloseDisplay(
    TkDisplay *dispPtr)
{
    TkSendCleanup(dispPtr);

    TkWmCleanup(dispPtr);

#ifdef TK_USE_INPUT_METHODS
    if (dispPtr->inputXfs) {
	XFreeFontSet(dispPtr->display, dispPtr->inputXfs);
    }
    if (dispPtr->inputMethod) {
	XCloseIM(dispPtr->inputMethod);
    }
#endif

    if (dispPtr->display != 0) {
	Tcl_DeleteFileHandler(ConnectionNumber(dispPtr->display));
	(void) XSync(dispPtr->display, False);
	(void) XCloseDisplay(dispPtr->display);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkClipCleanup --
 *
 *	This function is called to cleanup resources associated with claiming
 *	clipboard ownership and for receiving selection get results. This
 *	function is called in tkWindow.c. This has to be called by the display
 *	cleanup function because we still need the access display elements.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Resources are freed - the clipboard may no longer be used.
 *
 *----------------------------------------------------------------------
 */

void
TkClipCleanup(
    TkDisplay *dispPtr)		/* Display associated with clipboard */
{
    if (dispPtr->clipWindow != NULL) {
	Tk_DeleteSelHandler(dispPtr->clipWindow, dispPtr->clipboardAtom,
		dispPtr->applicationAtom);
	Tk_DeleteSelHandler(dispPtr->clipWindow, dispPtr->clipboardAtom,
		dispPtr->windowAtom);

	Tk_DestroyWindow(dispPtr->clipWindow);
	Tcl_Release(dispPtr->clipWindow);
	dispPtr->clipWindow = NULL;
    }
}

/*
 *----------------------------------------------------------------------
 *
 * DisplaySetupProc --
 *
 *	This function implements the setup part of the UNIX X display event
 *	source. It is invoked by Tcl_DoOneEvent before entering the notifier
 *	to check for events on all displays.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	If data is queued on a display inside Xlib, then the maximum block
 *	time will be set to 0 to ensure that the notifier returns control to
 *	Tcl even if there is no more data on the X connection.
 *
 *----------------------------------------------------------------------
 */

static void
DisplaySetupProc(
    ClientData clientData,	/* Not used. */
    int flags)
{
    TkDisplay *dispPtr;
    static Tcl_Time blockTime = { 0, 0 };

    if (!(flags & TCL_WINDOW_EVENTS)) {
	return;
    }

    for (dispPtr = TkGetDisplayList(); dispPtr != NULL;
	    dispPtr = dispPtr->nextPtr) {
	/*
	 * Flush the display. If data is pending on the X queue, set the block
	 * time to zero. This ensures that we won't block in the notifier if
	 * there is data in the X queue, but not on the server socket.
	 */

	XFlush(dispPtr->display);
	if (QLength(dispPtr->display) > 0) {
	    Tcl_SetMaxBlockTime(&blockTime);
	}
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TransferXEventsToTcl --
 *
 *	Transfer events from the X event queue to the Tk event queue.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Moves queued X events onto the Tcl event queue.
 *
 *----------------------------------------------------------------------
 */

static void
TransferXEventsToTcl(
    Display *display)
{
    union {
	int type;
	XEvent x;
	TkKeyEvent k;
#ifdef GenericEvent
	xGenericEvent xge;
#endif
    } event;
    Window w;
    TkDisplay *dispPtr = NULL;

    /*
     * Transfer events from the X event queue to the Tk event queue after XIM
     * event filtering. KeyPress and KeyRelease events need special treatment
     * so that they get directed according to Tk's focus rules during XIM
     * handling. Theoretically they can go to the wrong place still (if
     * there's a focus change in the queue) but if we push the handling off
     * until Tk_HandleEvent then many input methods actually cease to work
     * correctly. Most of the time, Tk processes its event queue fast enough
     * for this to not be an issue anyway. [Bug 1924761]
     */

    while (QLength(display) > 0) {
	XNextEvent(display, &event.x);
#ifdef GenericEvent
	if (event.type == GenericEvent) {
	    Tcl_Panic("Wild GenericEvent; panic! (extension=%d,evtype=%d)",
		    event.xge.extension, event.xge.evtype);
	}
#endif
	w = None;
	if (event.type == KeyPress || event.type == KeyRelease) {
	    for (dispPtr = TkGetDisplayList(); ; dispPtr = dispPtr->nextPtr) {
		if (dispPtr == NULL) {
		    break;
		} else if (dispPtr->display == event.x.xany.display) {
		    if (dispPtr->focusPtr != NULL) {
			w = dispPtr->focusPtr->window;
		    }
		    break;
		}
	    }
	}
	if (XFilterEvent(&event.x, w)) {
	    continue;
	}
	if (event.type == KeyPress || event.type == KeyRelease) {
	    event.k.charValuePtr = NULL;
	    event.k.charValueLen = 0;
	    event.k.keysym = NoSymbol;

	    /*
	     * Force the calling of the input method engine now. The results
	     * from it will be cached in the event so that they don't get lost
	     * (to a race condition with other XIM-handled key events) between
	     * entering the event queue and getting serviced. [Bug 1924761]
	     */

#ifdef TK_USE_INPUT_METHODS
	    if (event.type == KeyPress && dispPtr &&
		    (dispPtr->flags & TK_DISPLAY_USE_IM)) {
		if (dispPtr->focusPtr && dispPtr->focusPtr->inputContext) {
		    Tcl_DString ds;

		    Tcl_DStringInit(&ds);
		    (void) TkpGetString(dispPtr->focusPtr, &event.x, &ds);
		    Tcl_DStringFree(&ds);
		}
	    }
#endif
	}
	Tk_QueueWindowEvent(&event.x, TCL_QUEUE_TAIL);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * DisplayCheckProc --
 *
 *	This function checks for events sitting in the X event queue.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Moves queued events onto the Tcl event queue.
 *
 *----------------------------------------------------------------------
 */

static void
DisplayCheckProc(
    ClientData clientData,	/* Not used. */
    int flags)
{
    TkDisplay *dispPtr;

    if (!(flags & TCL_WINDOW_EVENTS)) {
	return;
    }

    for (dispPtr = TkGetDisplayList(); dispPtr != NULL;
	    dispPtr = dispPtr->nextPtr) {
	XFlush(dispPtr->display);
	TransferXEventsToTcl(dispPtr->display);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * DisplayFileProc --
 *
 *	This function implements the file handler for the X connection.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Makes entries on the Tcl event queue for all the events available from
 *	all the displays.
 *
 *----------------------------------------------------------------------
 */

static void
DisplayFileProc(
    ClientData clientData,	/* The display pointer. */
    int flags)			/* Should be TCL_READABLE. */
{
    TkDisplay *dispPtr = (TkDisplay *) clientData;
    Display *display = dispPtr->display;
    int numFound;

    XFlush(display);
    numFound = XEventsQueued(display, QueuedAfterReading);
    if (numFound == 0) {
	/*
	 * Things are very tricky if there aren't any events readable at this
	 * point (after all, there was supposedly data available on the
	 * connection). A couple of things could have occurred:
	 *
	 * One possibility is that there were only error events in the input
	 * from the server. If this happens, we should return (we don't want
	 * to go to sleep in XNextEvent below, since this would block out
	 * other sources of input to the process).
	 *
	 * Another possibility is that our connection to the server has been
	 * closed. This will not necessarily be detected in XEventsQueued (!!)
	 * so if we just return then there will be an infinite loop. To detect
	 * such an error, generate a NoOp protocol request to exercise the
	 * connection to the server, then return. However, must disable
	 * SIGPIPE while sending the request, or else the process will die
	 * from the signal and won't invoke the X error function to print a
	 * nice (?!) message.
	 */

	void (*oldHandler)();

	oldHandler = (void (*)()) signal(SIGPIPE, SIG_IGN);
	XNoOp(display);
	XFlush(display);
	(void) signal(SIGPIPE, oldHandler);
    }

    TransferXEventsToTcl(display);
}

/*
 *----------------------------------------------------------------------
 *
 * TkUnixDoOneXEvent --
 *
 *	This routine waits for an X event to be processed or for a timeout to
 *	occur. The timeout is specified as an absolute time. This routine is
 *	called when Tk needs to wait for a particular X event without letting
 *	arbitrary events be processed. The caller will typically call
 *	Tk_RestrictEvents to set up an event filter before calling this
 *	routine. This routine will service at most one event per invocation.
 *
 * Results:
 *	Returns 0 if the timeout has expired, otherwise returns 1.
 *
 * Side effects:
 *	Can invoke arbitrary Tcl scripts.
 *
 *----------------------------------------------------------------------
 */

int
TkUnixDoOneXEvent(
    Tcl_Time *timePtr)		/* Specifies the absolute time when the call
				 * should time out. */
{
    TkDisplay *dispPtr;
    static fd_mask readMask[MASK_SIZE];
    struct timeval blockTime, *timeoutPtr;
    Tcl_Time now;
    int fd, index, numFound, numFdBits = 0;
    fd_mask bit, *readMaskPtr = readMask;

    /*
     * Look for queued events first.
     */

    if (Tcl_ServiceEvent(TCL_WINDOW_EVENTS)) {
	return 1;
    }

    /*
     * Compute the next block time and check to see if we have timed out. Note
     * that HP-UX defines tv_sec to be unsigned so we have to be careful in
     * our arithmetic.
     */

    if (timePtr) {
	Tcl_GetTime(&now);
	blockTime.tv_sec = timePtr->sec;
	blockTime.tv_usec = timePtr->usec - now.usec;
	if (blockTime.tv_usec < 0) {
	    now.sec += 1;
	    blockTime.tv_usec += 1000000;
	}
	if (blockTime.tv_sec < now.sec) {
	    blockTime.tv_sec = 0;
	    blockTime.tv_usec = 0;
	} else {
	    blockTime.tv_sec -= now.sec;
	}
	timeoutPtr = &blockTime;
    } else {
	timeoutPtr = NULL;
    }

    /*
     * Set up the select mask for all of the displays. If a display has data
     * pending, then we want to poll instead of blocking.
     */

    memset(readMask, 0, MASK_SIZE*sizeof(fd_mask));
    for (dispPtr = TkGetDisplayList(); dispPtr != NULL;
	    dispPtr = dispPtr->nextPtr) {
	XFlush(dispPtr->display);
	if (QLength(dispPtr->display) > 0) {
	    blockTime.tv_sec = 0;
	    blockTime.tv_usec = 0;
	}
	fd = ConnectionNumber(dispPtr->display);
	index = fd/(NBBY*sizeof(fd_mask));
	bit = ((fd_mask)1) << (fd%(NBBY*sizeof(fd_mask)));
	readMask[index] |= bit;
	if (numFdBits <= fd) {
	    numFdBits = fd+1;
	}
    }

    numFound = select(numFdBits, (SELECT_MASK *) readMaskPtr, NULL, NULL,
	    timeoutPtr);
    if (numFound <= 0) {
	/*
	 * Some systems don't clear the masks after an error, so we have to do
	 * it here.
	 */

	memset(readMask, 0, MASK_SIZE*sizeof(fd_mask));
    }

    /*
     * Process any new events on the display connections.
     */

    for (dispPtr = TkGetDisplayList(); dispPtr != NULL;
	    dispPtr = dispPtr->nextPtr) {
	fd = ConnectionNumber(dispPtr->display);
	index = fd/(NBBY*sizeof(fd_mask));
	bit = ((fd_mask)1) << (fd%(NBBY*sizeof(fd_mask)));
	if ((readMask[index] & bit) || (QLength(dispPtr->display) > 0)) {
	    DisplayFileProc(dispPtr, TCL_READABLE);
	}
    }
    if (Tcl_ServiceEvent(TCL_WINDOW_EVENTS)) {
	return 1;
    }

    /*
     * Check to see if we timed out.
     */

    if (timePtr) {
	Tcl_GetTime(&now);
	if ((now.sec > timePtr->sec) || ((now.sec == timePtr->sec)
		&& (now.usec > timePtr->usec))) {
	    return 0;
	}
    }

    /*
     * We had an event but we did not generate a Tcl event from it. Behave as
     * though we dealt with it. (JYL&SS)
     */

    return 1;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpSync --
 *
 *	This routine ensures that all pending X requests have been seen by the
 *	server, and that any pending X events have been moved onto the Tk
 *	event queue.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Places new events on the Tk event queue.
 *
 *----------------------------------------------------------------------
 */

void
TkpSync(
    Display *display)		/* Display to sync. */
{
    XSync(display, False);

    /*
     * Transfer events from the X event queue to the Tk event queue.
     */

    TransferXEventsToTcl(display);
}
#ifdef TK_USE_INPUT_METHODS

/*
 *--------------------------------------------------------------
 *
 * OpenIM --
 *
 *	Tries to open an X input method associated with the given display.
 *
 * Results:
 *	Stores the input method in dispPtr->inputMethod; if there isn't a
 *	suitable input method, then NULL is stored in dispPtr->inputMethod.
 *
 * Side effects:
 *	An input method gets opened.
 *
 *--------------------------------------------------------------
 */

static void
OpenIM(
    TkDisplay *dispPtr)		/* Tk's structure for the display. */
{
    int i;
    XIMStyles *stylePtr;
    XIMStyle bestStyle = 0;

    if (XSetLocaleModifiers("") == NULL) {
	return;
    }

    dispPtr->inputMethod = XOpenIM(dispPtr->display, NULL, NULL, NULL);
    if (dispPtr->inputMethod == NULL) {
	return;
    }

    if ((XGetIMValues(dispPtr->inputMethod, XNQueryInputStyle, &stylePtr,
	    NULL) != NULL) || (stylePtr == NULL)) {
	goto error;
    }

    /*
     * Select the best input style supported by both the IM and Tk.
     */
    for (i = 0; i < stylePtr->count_styles; i++) {
	XIMStyle thisStyle = stylePtr->supported_styles[i];
	if (thisStyle == (XIMPreeditPosition | XIMStatusNothing)) {
	    bestStyle = thisStyle;
	    break;
	} else if (thisStyle == (XIMPreeditNothing | XIMStatusNothing)) {
	    bestStyle = thisStyle;
	}
    }
    XFree(stylePtr);
    if (bestStyle == 0) {
	goto error;
    }

    dispPtr->inputStyle = bestStyle;

    /*
     * Create an XFontSet for preedit area.
     */
    if (dispPtr->inputStyle & XIMPreeditPosition) {
	char **missing_list;
	int missing_count;
	char *def_string;

	dispPtr->inputXfs = XCreateFontSet(dispPtr->display,
		"-*-*-*-R-Normal--14-130-75-75-*-*",
		&missing_list, &missing_count, &def_string);
	if (missing_count > 0) {
	    XFreeStringList(missing_list);
	}
    }

    return;

error:
    if (dispPtr->inputMethod) {
	XCloseIM(dispPtr->inputMethod);
	dispPtr->inputMethod = NULL;
    }
}
#endif /* TK_USE_INPUT_METHODS */

void
TkpWarpPointer(
    TkDisplay *dispPtr)
{
    Window w;			/* Which window to warp relative to. */

    if (dispPtr->warpWindow != NULL) {
	w = Tk_WindowId(dispPtr->warpWindow);
    } else {
	w = RootWindow(dispPtr->display,
		Tk_ScreenNumber(dispPtr->warpMainwin));
    }
    XWarpPointer(dispPtr->display, None, w, 0, 0, 0, 0,
	    (int) dispPtr->warpX, (int) dispPtr->warpY);
}

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */