summaryrefslogtreecommitdiffstats
path: root/unix/tkUnixEmbed.c
blob: d94157ce28c61c1642278d61365e1cc9b178f736 (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
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
/*
 * tkUnixEmbed.c --
 *
 *	This file contains platform-specific functions for UNIX to provide
 *	basic operations needed for application embedding (where one
 *	application can use as its main window an internal window from some
 *	other application). Also includes code to support busy windows.
 *
 * Copyright (c) 1996-1997 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 "tkBusy.h"

/*
 * One of the following structures exists for each container in this
 * application. It keeps track of the container window and its associated
 * embedded window.
 */

typedef struct Container {
    Window parent;		/* X's window id for the parent of the pair
				 * (the container). */
    Window parentRoot;		/* Id for the root window of parent's
				 * screen. */
    TkWindow *parentPtr;	/* Tk's information about the container, or
				 * NULL if the container isn't in this
				 * process. */
    Window wrapper;		/* X's window id for the wrapper window for
				 * the embedded window. Starts off as None,
				 * but gets filled in when the window is
				 * eventually created. */
    TkWindow *embeddedPtr;	/* Tk's information about the embedded window,
				 * or NULL if the embedded application isn't
				 * in this process. Note that this is *not*
				 * the same window as wrapper: wrapper is the
				 * parent of embeddedPtr. */
    struct Container *nextPtr;	/* Next in list of all containers in this
				 * process. */
} Container;

typedef struct ThreadSpecificData {
    Container *firstContainerPtr;
				/* First in list of all containers managed by
				 * this process. */
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;

/*
 * Prototypes for static functions defined in this file:
 */

static void		ContainerEventProc(ClientData clientData,
			    XEvent *eventPtr);
static void		EmbeddedEventProc(ClientData clientData,
			    XEvent *eventPtr);
static int		EmbedErrorProc(ClientData clientData,
			    XErrorEvent *errEventPtr);
static void		EmbedFocusProc(ClientData clientData,
			    XEvent *eventPtr);
static void		EmbedGeometryRequest(Container *containerPtr,
			    int width, int height);
static void		EmbedSendConfigure(Container *containerPtr);
static void		EmbedStructureProc(ClientData clientData,
			    XEvent *eventPtr);
static void		EmbedWindowDeleted(TkWindow *winPtr);

/*
 *----------------------------------------------------------------------
 *
 * TkpUseWindow --
 *
 *	This function causes a Tk window to use a given X window as its parent
 *	window, rather than the root window for the screen. It is invoked by
 *	an embedded application to specify the window in which it is embedded.
 *
 * Results:
 *	The return value is normally TCL_OK. If an error occurs (such as
 *	string not being a valid window spec), then the return value is
 *	TCL_ERROR and an error message is left in the interp's result if
 *	interp is non-NULL.
 *
 * Side effects:
 *	Changes the colormap and other visual information to match that of the
 *	parent window given by "string".
 *
 *----------------------------------------------------------------------
 */

int
TkpUseWindow(
    Tcl_Interp *interp,		/* If not NULL, used for error reporting if
				 * string is bogus. */
    Tk_Window tkwin,		/* Tk window that does not yet have an
				 * associated X window. */
    const char *string)		/* String identifying an X window to use for
				 * tkwin; must be an integer value. */
{
    TkWindow *winPtr = (TkWindow *) tkwin;
    TkWindow *usePtr;
    int id, anyError;
    Window parent;
    Tk_ErrorHandler handler;
    Container *containerPtr;
    XWindowAttributes parentAtts;
    ThreadSpecificData *tsdPtr =
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    if (winPtr->window != None) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj(
		"can't modify container after widget is created", -1));
	Tcl_SetErrorCode(interp, "TK", "EMBED", "POST_CREATE", NULL);
	return TCL_ERROR;
    }
    if (Tcl_GetInt(interp, string, &id) != TCL_OK) {
	return TCL_ERROR;
    }
    parent = (Window) id;

    usePtr = (TkWindow *) Tk_IdToWindow(winPtr->display, parent);
    if (usePtr != NULL) {
	if (!(usePtr->flags & TK_CONTAINER)) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "window \"%s\" doesn't have -container option set",
		    usePtr->pathName));
	    Tcl_SetErrorCode(interp, "TK", "EMBED", "CONTAINER", NULL);
	    return TCL_ERROR;
	}
    }

    /*
     * Tk sets the window colormap to the screen default colormap in
     * tkWindow.c:AllocWindow. This doesn't work well for embedded windows. So
     * we override the colormap and visual settings to be the same as the
     * parent window (which is in the container app).
     */

    anyError = 0;
    handler = Tk_CreateErrorHandler(winPtr->display, -1, -1, -1,
	    EmbedErrorProc, &anyError);
    if (!XGetWindowAttributes(winPtr->display, parent, &parentAtts)) {
        anyError = 1;
    }
    XSync(winPtr->display, False);
    Tk_DeleteErrorHandler(handler);
    if (anyError) {
	if (interp != NULL) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "couldn't create child of window \"%s\"", string));
	    Tcl_SetErrorCode(interp, "TK", "EMBED", "CHILD", NULL);
	}
	return TCL_ERROR;
    }
    Tk_SetWindowVisual(tkwin, parentAtts.visual, parentAtts.depth,
	    parentAtts.colormap);

    /*
     * Create an event handler to clean up the Container structure when tkwin
     * is eventually deleted.
     */

    Tk_CreateEventHandler(tkwin, StructureNotifyMask, EmbeddedEventProc,
	    winPtr);

    /*
     * Save information about the container and the embedded window in a
     * Container structure. If there is already an existing Container
     * structure, it means that both container and embedded app. are in the
     * same process.
     */

    for (containerPtr = tsdPtr->firstContainerPtr; containerPtr != NULL;
	    containerPtr = containerPtr->nextPtr) {
	if (containerPtr->parent == parent) {
	    winPtr->flags |= TK_BOTH_HALVES;
	    containerPtr->parentPtr->flags |= TK_BOTH_HALVES;
	    break;
	}
    }
    if (containerPtr == NULL) {
	containerPtr = ckalloc(sizeof(Container));
	containerPtr->parent = parent;
	containerPtr->parentRoot = parentAtts.root;
	containerPtr->parentPtr = NULL;
	containerPtr->wrapper = None;
	containerPtr->nextPtr = tsdPtr->firstContainerPtr;
	tsdPtr->firstContainerPtr = containerPtr;
    }
    containerPtr->embeddedPtr = winPtr;
    winPtr->flags |= TK_EMBEDDED;
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpMakeWindow --
 *
 *	Create an actual window system window object based on the current
 *	attributes of the specified TkWindow.
 *
 * Results:
 *	Returns the handle to the new window, or None on failure.
 *
 * Side effects:
 *	Creates a new X window.
 *
 *----------------------------------------------------------------------
 */

Window
TkpMakeWindow(
    TkWindow *winPtr,		/* Tk's information about the window that is
				 * to be instantiated. */
    Window parent)		/* Window system token for the parent in which
				 * the window is to be created. */
{
    Container *containerPtr;
    ThreadSpecificData *tsdPtr =
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    if (winPtr->flags & TK_EMBEDDED) {
	/*
	 * This window is embedded. Don't create the new window in the given
	 * parent; instead, create it as a child of the root window of the
	 * container's screen. The window will get reparented into a wrapper
	 * window later.
	 */

	for (containerPtr = tsdPtr->firstContainerPtr; ;
		containerPtr = containerPtr->nextPtr) {
	    if (containerPtr == NULL) {
		Tcl_Panic("TkMakeWindow couldn't find container for window");
	    }
	    if (containerPtr->embeddedPtr == winPtr) {
		break;
	    }
	}
	parent = containerPtr->parentRoot;
    }

    return XCreateWindow(winPtr->display, parent, winPtr->changes.x,
	    winPtr->changes.y, (unsigned) winPtr->changes.width,
	    (unsigned) winPtr->changes.height,
	    (unsigned) winPtr->changes.border_width, winPtr->depth,
	    InputOutput, winPtr->visual, winPtr->dirtyAtts,
	    &winPtr->atts);
}

/*
 *----------------------------------------------------------------------
 *
 * TkpMakeContainer --
 *
 *	This function is called to indicate that a particular window will be a
 *	container for an embedded application. This changes certain aspects of
 *	the window's behavior, such as whether it will receive events anymore.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

void
TkpMakeContainer(
    Tk_Window tkwin)		/* Token for a window that is about to become
				 * a container. */
{
    TkWindow *winPtr = (TkWindow *) tkwin;
    Container *containerPtr;
    ThreadSpecificData *tsdPtr =
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    /*
     * Register the window as a container so that, for example, we can find
     * out later if the embedded app. is in the same process.
     */

    Tk_MakeWindowExist(tkwin);
    containerPtr = ckalloc(sizeof(Container));
    containerPtr->parent = Tk_WindowId(tkwin);
    containerPtr->parentRoot = RootWindowOfScreen(Tk_Screen(tkwin));
    containerPtr->parentPtr = winPtr;
    containerPtr->wrapper = None;
    containerPtr->embeddedPtr = NULL;
    containerPtr->nextPtr = tsdPtr->firstContainerPtr;
    tsdPtr->firstContainerPtr = containerPtr;
    winPtr->flags |= TK_CONTAINER;

    /*
     * Request SubstructureNotify events so that we can find out when the
     * embedded application creates its window or attempts to resize it. Also
     * watch Configure events on the container so that we can resize the child
     * to match.
     */

    winPtr->atts.event_mask |= SubstructureRedirectMask|SubstructureNotifyMask;
    XSelectInput(winPtr->display, winPtr->window, winPtr->atts.event_mask);
    Tk_CreateEventHandler(tkwin,
	    SubstructureNotifyMask|SubstructureRedirectMask,
	    ContainerEventProc, winPtr);
    Tk_CreateEventHandler(tkwin, StructureNotifyMask, EmbedStructureProc,
	    containerPtr);
    Tk_CreateEventHandler(tkwin, FocusChangeMask, EmbedFocusProc,
	    containerPtr);
}

/*
 *----------------------------------------------------------------------
 *
 * EmbedErrorProc --
 *
 *	This function is invoked if an error occurs while creating an embedded
 *	window.
 *
 * Results:
 *	Always returns 0 to indicate that the error has been properly handled.
 *
 * Side effects:
 *	The integer pointed to by the clientData argument is set to 1.
 *
 *----------------------------------------------------------------------
 */

static int
EmbedErrorProc(
    ClientData clientData,	/* Points to integer to set. */
    XErrorEvent *errEventPtr)	/* Points to information about error (not
				 * used). */
{
    int *iPtr = clientData;

    *iPtr = 1;
    return 0;
}

/*
 *----------------------------------------------------------------------
 *
 * EmbeddedEventProc --
 *
 *	This function is invoked by the Tk event dispatcher when various
 *	useful events are received for a window that is embedded in another
 *	application.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Our internal state gets cleaned up when an embedded window is
 *	destroyed.
 *
 *----------------------------------------------------------------------
 */

static void
EmbeddedEventProc(
    ClientData clientData,	/* Token for container window. */
    XEvent *eventPtr)		/* ResizeRequest event. */
{
    TkWindow *winPtr = clientData;

    if (eventPtr->type == DestroyNotify) {
	EmbedWindowDeleted(winPtr);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * ContainerEventProc --
 *
 *	This function is invoked by the Tk event dispatcher when various
 *	useful events are received for the children of a container window. It
 *	forwards relevant information, such as geometry requests, from the
 *	events into the container's application.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Depends on the event. For example, when ConfigureRequest events occur,
 *	geometry information gets set for the container window.
 *
 *----------------------------------------------------------------------
 */

static void
ContainerEventProc(
    ClientData clientData,	/* Token for container window. */
    XEvent *eventPtr)		/* ResizeRequest event. */
{
    TkWindow *winPtr = clientData;
    Container *containerPtr;
    Tk_ErrorHandler errHandler;
    ThreadSpecificData *tsdPtr =
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    /*
     * Ignore any X protocol errors that happen in this function (almost any
     * operation could fail, for example, if the embedded application has
     * deleted its window).
     */

    errHandler = Tk_CreateErrorHandler(eventPtr->xfocus.display, -1,
	    -1, -1, NULL, NULL);

    /*
     * Find the Container structure associated with the parent window.
     */

    for (containerPtr = tsdPtr->firstContainerPtr;
	    containerPtr->parent != eventPtr->xmaprequest.parent;
	    containerPtr = containerPtr->nextPtr) {
	if (containerPtr == NULL) {
	    Tcl_Panic("ContainerEventProc couldn't find Container record");
	}
    }

    if (eventPtr->type == CreateNotify) {
	/*
	 * A new child window has been created in the container. Record its id
	 * in the Container structure (if more than one child is created, just
	 * remember the last one and ignore the earlier ones). Also set the
	 * child's size to match the container.
	 */

	containerPtr->wrapper = eventPtr->xcreatewindow.window;
	XMoveResizeWindow(eventPtr->xcreatewindow.display,
		containerPtr->wrapper, 0, 0,
		(unsigned) Tk_Width((Tk_Window) containerPtr->parentPtr),
		(unsigned) Tk_Height((Tk_Window) containerPtr->parentPtr));
    } else if (eventPtr->type == ConfigureRequest) {
	if ((eventPtr->xconfigurerequest.x != 0)
		|| (eventPtr->xconfigurerequest.y != 0)) {
	    /*
	     * The embedded application is trying to move itself, which isn't
	     * legal. At this point, the window hasn't actually moved, but we
	     * need to send it a ConfigureNotify event to let it know that its
	     * request has been denied. If the embedded application was also
	     * trying to resize itself, a ConfigureNotify will be sent by the
	     * geometry management code below, so we don't need to do
	     * anything. Otherwise, generate a synthetic event.
	     */

	    if ((eventPtr->xconfigurerequest.width == winPtr->changes.width)
		    && (eventPtr->xconfigurerequest.height
		    == winPtr->changes.height)) {
		EmbedSendConfigure(containerPtr);
	    }
	}
	EmbedGeometryRequest(containerPtr,
		eventPtr->xconfigurerequest.width,
		eventPtr->xconfigurerequest.height);
    } else if (eventPtr->type == MapRequest) {
	/*
	 * The embedded application's map request was ignored and simply
	 * passed on to us, so we have to map the window for it to appear on
	 * the screen.
	 */

	XMapWindow(eventPtr->xmaprequest.display,
		eventPtr->xmaprequest.window);
    } else if (eventPtr->type == DestroyNotify) {
	/*
	 * The embedded application is gone. Destroy the container window.
	 */

	Tk_DestroyWindow((Tk_Window) winPtr);
    }
    Tk_DeleteErrorHandler(errHandler);
}

/*
 *----------------------------------------------------------------------
 *
 * EmbedStructureProc --
 *
 *	This function is invoked by the Tk event dispatcher when a container
 *	window owned by this application gets resized (and also at several
 *	other times that we don't care about). This function reflects the size
 *	change in the embedded window that corresponds to the container.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The embedded window gets resized to match the container.
 *
 *----------------------------------------------------------------------
 */

static void
EmbedStructureProc(
    ClientData clientData,	/* Token for container window. */
    XEvent *eventPtr)		/* ResizeRequest event. */
{
    Container *containerPtr = clientData;
    Tk_ErrorHandler errHandler;

    if (eventPtr->type == ConfigureNotify) {
	if (containerPtr->wrapper != None) {
	    /*
	     * Ignore errors, since the embedded application could have
	     * deleted its window.
	     */

	    errHandler = Tk_CreateErrorHandler(eventPtr->xfocus.display, -1,
		    -1, -1, NULL, NULL);
	    XMoveResizeWindow(eventPtr->xconfigure.display,
		    containerPtr->wrapper, 0, 0,
		    (unsigned) Tk_Width((Tk_Window) containerPtr->parentPtr),
		    (unsigned) Tk_Height((Tk_Window) containerPtr->parentPtr));
	    Tk_DeleteErrorHandler(errHandler);
	}
    } else if (eventPtr->type == DestroyNotify) {
	EmbedWindowDeleted(containerPtr->parentPtr);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * EmbedFocusProc --
 *
 *	This function is invoked by the Tk event dispatcher when FocusIn and
 *	FocusOut events occur for a container window owned by this
 *	application. It is responsible for moving the focus back and forth
 *	between a container application and an embedded application.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The X focus may change.
 *
 *----------------------------------------------------------------------
 */

static void
EmbedFocusProc(
    ClientData clientData,	/* Token for container window. */
    XEvent *eventPtr)		/* ResizeRequest event. */
{
    Container *containerPtr = clientData;
    Tk_ErrorHandler errHandler;
    Display *display;

    display = Tk_Display(containerPtr->parentPtr);
    if (eventPtr->type == FocusIn) {
	/*
	 * The focus just arrived at the container. Change the X focus to move
	 * it to the embedded application, if there is one. Ignore X errors
	 * that occur during this operation (it's possible that the new focus
	 * window isn't mapped).
	 */

	if (containerPtr->wrapper != None) {
	    errHandler = Tk_CreateErrorHandler(eventPtr->xfocus.display, -1,
		    -1, -1, NULL, NULL);
	    XSetInputFocus(display, containerPtr->wrapper, RevertToParent,
		    CurrentTime);
	    Tk_DeleteErrorHandler(errHandler);
	}
    }
}

/*
 *----------------------------------------------------------------------
 *
 * EmbedGeometryRequest --
 *
 *	This function is invoked when an embedded application requests a
 *	particular size. It processes the request (which may or may not
 *	actually honor the request) and reflects the results back to the
 *	embedded application.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	If we deny the child's size change request, a Configure event is
 *	synthesized to let the child know how big it ought to be. Events get
 *	processed while we're waiting for the geometry managers to do their
 *	thing.
 *
 *----------------------------------------------------------------------
 */

static void
EmbedGeometryRequest(
    Container *containerPtr,	/* Information about the embedding. */
    int width, int height)	/* Size that the child has requested. */
{
    TkWindow *winPtr = containerPtr->parentPtr;

    /*
     * Forward the requested size into our geometry management hierarchy via
     * the container window. We need to send a Configure event back to the
     * embedded application if we decide not to honor its request; to make
     * this happen, process all idle event handlers synchronously here (so
     * that the geometry managers have had a chance to do whatever they want
     * to do), and if the window's size didn't change then generate a
     * configure event.
     */

    Tk_GeometryRequest((Tk_Window) winPtr, width, height);
    while (Tcl_DoOneEvent(TCL_IDLE_EVENTS)) {
	/* Empty loop body. */
    }
    if ((winPtr->changes.width != width)
	    || (winPtr->changes.height != height)) {
	EmbedSendConfigure(containerPtr);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * EmbedSendConfigure --
 *
 *	This function synthesizes a ConfigureNotify event to notify an
 *	embedded application of its current size and location. This function
 *	is called when the embedded application made a geometry request that
 *	we did not grant, so that the embedded application knows that its
 *	geometry didn't change after all.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static void
EmbedSendConfigure(
    Container *containerPtr)	/* Information about the embedding. */
{
    TkWindow *winPtr = containerPtr->parentPtr;
    XEvent event;

    event.xconfigure.type = ConfigureNotify;
    event.xconfigure.serial = LastKnownRequestProcessed(winPtr->display);
    event.xconfigure.send_event = True;
    event.xconfigure.display = winPtr->display;
    event.xconfigure.event = containerPtr->wrapper;
    event.xconfigure.window = containerPtr->wrapper;
    event.xconfigure.x = 0;
    event.xconfigure.y = 0;
    event.xconfigure.width = winPtr->changes.width;
    event.xconfigure.height = winPtr->changes.height;
    event.xconfigure.above = None;
    event.xconfigure.override_redirect = False;

    /*
     * Note: when sending the event below, the ButtonPressMask causes the
     * event to be sent only to applications that have selected for
     * ButtonPress events, which should be just the embedded application.
     */

    XSendEvent(winPtr->display, containerPtr->wrapper, False,
	    0, &event);

    /*
     * The following needs to be done if the embedded window is not in the
     * same application as the container window.
     */

    if (containerPtr->embeddedPtr == NULL) {
	XMoveResizeWindow(winPtr->display, containerPtr->wrapper, 0, 0,
		(unsigned) winPtr->changes.width,
		(unsigned) winPtr->changes.height);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkpGetOtherWindow --
 *
 *	If both the container and embedded window are in the same process,
 *	this function will return either one, given the other.
 *
 * Results:
 *	If winPtr is a container, the return value is the token for the
 *	embedded window, and vice versa. If the "other" window isn't in this
 *	process, NULL is returned.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

TkWindow *
TkpGetOtherWindow(
    TkWindow *winPtr)		/* Tk's structure for a container or embedded
				 * window. */
{
    Container *containerPtr;
    ThreadSpecificData *tsdPtr =
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    for (containerPtr = tsdPtr->firstContainerPtr;
            containerPtr != NULL;
	    containerPtr = containerPtr->nextPtr) {
	if (containerPtr->embeddedPtr == winPtr) {
	    return containerPtr->parentPtr;
	} else if (containerPtr->parentPtr == winPtr) {
	    return containerPtr->embeddedPtr;
	}
    }
    return NULL;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpRedirectKeyEvent --
 *
 *	This function is invoked when a key press or release event arrives for
 *	an application that does not believe it owns the input focus. This can
 *	happen because of embedding; for example, X can send an event to an
 *	embedded application when the real focus window is in the container
 *	application and is an ancestor of the container. This function's job
 *	is to forward the event back to the application where it really
 *	belongs.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The event may get sent to a different application.
 *
 *----------------------------------------------------------------------
 */

void
TkpRedirectKeyEvent(
    TkWindow *winPtr,		/* Window to which the event was originally
				 * reported. */
    XEvent *eventPtr)		/* X event to redirect (should be KeyPress or
				 * KeyRelease). */
{
    Container *containerPtr;
    Window saved;
    ThreadSpecificData *tsdPtr =
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    /*
     * First, find the top-level window corresponding to winPtr.
     */

    while (1) {
	if (winPtr == NULL) {
	    /*
	     * This window is being deleted. This is too confusing a case to
	     * handle so discard the event.
	     */

	    return;
	}
	if (winPtr->flags & TK_TOP_HIERARCHY) {
	    break;
	}
	winPtr = winPtr->parentPtr;
    }

    if (winPtr->flags & TK_EMBEDDED) {
	/*
	 * This application is embedded. If we got a key event without
	 * officially having the focus, it means that the focus is really in
	 * the container, but the mouse was over the embedded application.
	 * Send the event back to the container.
	 */

	for (containerPtr = tsdPtr->firstContainerPtr;
		containerPtr->embeddedPtr != winPtr;
		containerPtr = containerPtr->nextPtr) {
	    /* Empty loop body. */
	}
	saved = eventPtr->xkey.window;
	eventPtr->xkey.window = containerPtr->parent;
	XSendEvent(eventPtr->xkey.display, eventPtr->xkey.window, False,
		KeyPressMask|KeyReleaseMask, eventPtr);
	eventPtr->xkey.window = saved;
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkpClaimFocus --
 *
 *	This function is invoked when someone asks or the input focus to be
 *	put on a window in an embedded application, but the application
 *	doesn't currently have the focus. It requests the input focus from the
 *	container application.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The input focus may change.
 *
 *----------------------------------------------------------------------
 */

void
TkpClaimFocus(
    TkWindow *topLevelPtr,	/* Top-level window containing desired focus
				 * window; should be embedded. */
    int force)			/* One means that the container should claim
				 * the focus if it doesn't currently have
				 * it. */
{
    XEvent event;
    Container *containerPtr;
    ThreadSpecificData *tsdPtr =
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    if (!(topLevelPtr->flags & TK_EMBEDDED)) {
	return;
    }

    for (containerPtr = tsdPtr->firstContainerPtr;
	    containerPtr->embeddedPtr != topLevelPtr;
	    containerPtr = containerPtr->nextPtr) {
	/* Empty loop body. */
    }

    event.xfocus.type = FocusIn;
    event.xfocus.serial = LastKnownRequestProcessed(topLevelPtr->display);
    event.xfocus.send_event = 1;
    event.xfocus.display = topLevelPtr->display;
    event.xfocus.window = containerPtr->parent;
    event.xfocus.mode = EMBEDDED_APP_WANTS_FOCUS;
    event.xfocus.detail = force;
    XSendEvent(event.xfocus.display, event.xfocus.window, False, 0, &event);
}

/*
 *----------------------------------------------------------------------
 *
 * TkpTestembedCmd --
 *
 *	This function implements the "testembed" command. It returns some or
 *	all of the information in the list pointed to by firstContainerPtr.
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
TkpTestembedCmd(
    ClientData clientData,	/* Main window for application. */
    Tcl_Interp *interp,		/* Current interpreter. */
    int argc,			/* Number of arguments. */
    const char **argv)		/* Argument strings. */
{
    int all;
    Container *containerPtr;
    Tcl_DString dString;
    char buffer[50];
    ThreadSpecificData *tsdPtr =
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    if ((argc > 1) && (strcmp(argv[1], "all") == 0)) {
	all = 1;
    } else {
	all = 0;
    }
    Tcl_DStringInit(&dString);
    for (containerPtr = tsdPtr->firstContainerPtr; containerPtr != NULL;
	    containerPtr = containerPtr->nextPtr) {
	Tcl_DStringStartSublist(&dString);
	if (containerPtr->parent == None) {
	    Tcl_DStringAppendElement(&dString, "");
	} else if (all) {
	    sprintf(buffer, "0x%x", (int) containerPtr->parent);
	    Tcl_DStringAppendElement(&dString, buffer);
	} else {
	    Tcl_DStringAppendElement(&dString, "XXX");
	}
	if (containerPtr->parentPtr == NULL) {
	    Tcl_DStringAppendElement(&dString, "");
	} else {
	    Tcl_DStringAppendElement(&dString,
		    containerPtr->parentPtr->pathName);
	}
	if (containerPtr->wrapper == None) {
	    Tcl_DStringAppendElement(&dString, "");
	} else if (all) {
	    sprintf(buffer, "0x%x", (int) containerPtr->wrapper);
	    Tcl_DStringAppendElement(&dString, buffer);
	} else {
	    Tcl_DStringAppendElement(&dString, "XXX");
	}
	if (containerPtr->embeddedPtr == NULL) {
	    Tcl_DStringAppendElement(&dString, "");
	} else {
	    Tcl_DStringAppendElement(&dString,
		    containerPtr->embeddedPtr->pathName);
	}
	Tcl_DStringEndSublist(&dString);
    }
    Tcl_DStringResult(interp, &dString);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * EmbedWindowDeleted --
 *
 *	This function is invoked when a window involved in embedding (as
 *	either the container or the embedded application) is destroyed. It
 *	cleans up the Container structure for the window.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	A Container structure may be freed.
 *
 *----------------------------------------------------------------------
 */

static void
EmbedWindowDeleted(
    TkWindow *winPtr)		/* Tk's information about window that was
				 * deleted. */
{
    Container *containerPtr, *prevPtr;
    ThreadSpecificData *tsdPtr =
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    /*
     * Find the Container structure for this window work. Delete the
     * information about the embedded application and free the container's
     * record.
     */

    prevPtr = NULL;
    containerPtr = tsdPtr->firstContainerPtr;
    while (1) {
	if (containerPtr->embeddedPtr == winPtr) {
	    containerPtr->wrapper = None;
	    containerPtr->embeddedPtr = NULL;
	    break;
	}
	if (containerPtr->parentPtr == winPtr) {
	    containerPtr->parentPtr = NULL;
	    break;
	}
	prevPtr = containerPtr;
	containerPtr = containerPtr->nextPtr;
    }
    if ((containerPtr->embeddedPtr == NULL)
	    && (containerPtr->parentPtr == NULL)) {
	if (prevPtr == NULL) {
	    tsdPtr->firstContainerPtr = containerPtr->nextPtr;
	} else {
	    prevPtr->nextPtr = containerPtr->nextPtr;
	}
	ckfree(containerPtr);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkUnixContainerId --
 *
 *	Given an embedded window, this function returns the X window
 *	identifier for the associated container window.
 *
 * Results:
 *	The return value is the X window identifier for winPtr's container
 *	window.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

Window
TkUnixContainerId(
    TkWindow *winPtr)		/* Tk's structure for an embedded window. */
{
    Container *containerPtr;
    ThreadSpecificData *tsdPtr =
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    for (containerPtr = tsdPtr->firstContainerPtr;
            containerPtr != NULL; containerPtr = containerPtr->nextPtr) {
	if (containerPtr->embeddedPtr == winPtr) {
	    return containerPtr->parent;
	}
    }
    Tcl_Panic("TkUnixContainerId couldn't find window");
    return None;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpShowBusyWindow --
 *
 *	Makes a busy window "appear".
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Arranges for the busy window to start intercepting events and the
 *	cursor to change to the configured "hey, I'm busy!" setting.
 *
 *----------------------------------------------------------------------
 */

void
TkpShowBusyWindow(
    TkBusy busy)
{
    Busy *busyPtr = (Busy *) busy;

    if (busyPtr->tkBusy != NULL) {
	Tk_MapWindow(busyPtr->tkBusy);

	/*
	 * Always raise the busy window just in case new sibling windows have
	 * been created in the meantime. Can't use Tk_RestackWindow because it
	 * doesn't work under Win32.
	 */

	XRaiseWindow(Tk_Display(busyPtr->tkBusy),
		Tk_WindowId(busyPtr->tkBusy));
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkpHideBusyWindow --
 *
 *	Makes a busy window "disappear".
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Arranges for the busy window to stop intercepting events, and the
 *	cursor to change back to its normal setting.
 *
 *----------------------------------------------------------------------
 */

void
TkpHideBusyWindow(
    TkBusy busy)
{
    Busy *busyPtr = (Busy *) busy;

    if (busyPtr->tkBusy != NULL) {
	Tk_UnmapWindow(busyPtr->tkBusy);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkpMakeTransparentWindowExist --
 *
 *	Construct the platform-specific resources for a transparent window.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Moves the specified window in the stacking order.
 *
 *----------------------------------------------------------------------
 */

void
TkpMakeTransparentWindowExist(
    Tk_Window tkwin,		/* Token for window. */
    Window parent)		/* Parent window. */
{
    TkWindow *winPtr = (TkWindow *) tkwin;
    long int mask = CWDontPropagate | CWEventMask;

    /*
     * Ignore the important events while the window is mapped.
     */

#define USER_EVENTS \
	(EnterWindowMask | LeaveWindowMask | KeyPressMask | KeyReleaseMask | \
	ButtonPressMask | ButtonReleaseMask | PointerMotionMask)
#define PROP_EVENTS \
	(KeyPressMask | KeyReleaseMask | ButtonPressMask | \
	ButtonReleaseMask | PointerMotionMask)

    winPtr->atts.do_not_propagate_mask = PROP_EVENTS;
    winPtr->atts.event_mask = USER_EVENTS;
    winPtr->changes.border_width = 0;
    winPtr->depth = 0;

    winPtr->window = XCreateWindow(winPtr->display, parent,
	    winPtr->changes.x, winPtr->changes.y,
	    (unsigned) winPtr->changes.width,		/* width */
	    (unsigned) winPtr->changes.height,		/* height */
	    (unsigned) winPtr->changes.border_width,	/* border_width */
	    winPtr->depth, InputOnly, winPtr->visual, mask, &winPtr->atts);
}

/*
 *----------------------------------------------------------------------
 *
 * TkpCreateBusy --
 *
 *	Construct the platform-specific parts of a busy window. Note that this
 *	postpones the actual creation of the window resource until later.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Sets up part of the busy window structure.
 *
 *----------------------------------------------------------------------
 */

void
TkpCreateBusy(
    Tk_FakeWin *winPtr,
    Tk_Window tkRef,
    Window *parentPtr,
    Tk_Window tkParent,
    TkBusy busy)
{
    Window root, parent, *dummy;
    unsigned int count;

    if (winPtr->flags & TK_REPARENTED) {
	/*
	 * This works around a bug in the implementation of menubars for
	 * non-MacIntosh window systems (Win32 and X11). Tk doesn't reset the
	 * pointers to the parent window when the menu is reparented (since
	 * winPtr->parentPtr points to the wrong window). We get around this
	 * by determining the parent via the native API calls.
	 */

	if (XQueryTree(Tk_Display(tkRef), Tk_WindowId(tkRef), &root,
		&parent, &dummy, &count) > 0) {
	    XFree(dummy);
	    *parentPtr = parent;
	} else {
	    *parentPtr = None;
	}
    } else {
	*parentPtr = Tk_WindowId(tkParent);
    }
}

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */