summaryrefslogtreecommitdiffstats
path: root/macosx/tkMacOSXKeyEvent.c
blob: b8d3828d920222853e1c3734945c8019c16ea59e (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
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
/*
 * tkMacOSXKeyEvent.c --
 *
 *      This file implements functions that decode & handle keyboard events
 *      on MacOS X.
 *
 * Copyright 2001, Apple Computer, Inc.
 * Copyright (c) 2006 Daniel A. Steffen <das@users.sourceforge.net>
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 *      The following terms apply to all files originating from Apple
 *      Computer, Inc. ("Apple") and associated with the software
 *      unless explicitly disclaimed in individual files.
 *
 *
 *      Apple hereby grants permission to use, copy, modify,
 *      distribute, and license this software and its documentation
 *      for any purpose, provided that existing copyright notices are
 *      retained in all copies and that this notice is included
 *      verbatim in any distributions. No written agreement, license,
 *      or royalty fee is required for any of the authorized
 *      uses. Modifications to this software may be copyrighted by
 *      their authors and need not follow the licensing terms
 *      described here, provided that the new terms are clearly
 *      indicated on the first page of each file where they apply.
 *
 *
 *      IN NO EVENT SHALL APPLE, THE AUTHORS OR DISTRIBUTORS OF THE
 *      SOFTWARE BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL,
 *      INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
 *      THIS SOFTWARE, ITS DOCUMENTATION, OR ANY DERIVATIVES THEREOF,
 *      EVEN IF APPLE OR THE AUTHORS HAVE BEEN ADVISED OF THE
 *      POSSIBILITY OF SUCH DAMAGE.  APPLE, THE AUTHORS AND
 *      DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING,
 *      BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
 *      FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.  THIS
 *      SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND APPLE,THE
 *      AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
 *      MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 *      GOVERNMENT USE: If you are acquiring this software on behalf
 *      of the U.S. government, the Government shall have only
 *      "Restricted Rights" in the software and related documentation
 *      as defined in the Federal Acquisition Regulations (FARs) in
 *      Clause 52.227.19 (c) (2).  If you are acquiring the software
 *      on behalf of the Department of Defense, the software shall be
 *      classified as "Commercial Computer Software" and the
 *      Government shall have only "Restricted Rights" as defined in
 *      Clause 252.227-7013 (c) (1) of DFARs.  Notwithstanding the
 *      foregoing, the authors grant the U.S. Government and others
 *      acting in its behalf permission to use and distribute the
 *      software in accordance with the terms specified in this
 *      license.
 *
 * RCS: @(#) $Id: tkMacOSXKeyEvent.c,v 1.6.2.12 2006/09/11 14:41:17 das Exp $
 */

#include "tkMacOSXInt.h"
#include "tkMacOSXEvent.h"

/*
#ifdef	TK_MAC_DEBUG
#define TK_MAC_DEBUG_KEYBOARD
#endif
*/

typedef struct {
    WindowRef   whichWindow;
    int         global_x, global_y;
    int         local_x, local_y;
    unsigned int state;
    unsigned char ch;
    UInt32      keyCode;
    UInt32      keyModifiers;
    UInt32      message;  
} KeyEventData;

static Tk_Window gGrabWinPtr = NULL;     /* Current grab window,
                                          * NULL if no grab. */
static Tk_Window gKeyboardWinPtr = NULL; /* Current keyboard grab window. */

static UInt32 deadKeyStateUp = 0;        /* The deadkey state for the current
                                          * sequence of keyup events or 0 if
                                          * not in a deadkey sequence */
static UInt32 deadKeyStateDown = 0;      /* Ditto for keydown */

/*
 * Declarations for functions used only in this file.
 */
 
static int InitKeyData(
        KeyEventData * keyEventDataPtr);

static int InitKeyEvent(
        XEvent * eventPtr,
        KeyEventData * e, 
        UInt32 savedKeyCode,
        UInt32 savedModifiers);

static int GenerateKeyEvent (
        UInt32 eKind, 
        KeyEventData * e, 
        UInt32 savedKeyCode,
        UInt32 savedModifiers,
        const UniChar * chars, int numChars);

static int GetKeyboardLayout (
        Ptr * resourcePtr, TextEncoding * encodingPtr);
static TextEncoding GetKCHREncoding(
        ScriptCode script, SInt32 layoutid);

static int KeycodeToUnicodeViaUnicodeResource(
        UniChar * uniChars, int maxChars,
        Ptr uchr,
        EventKind eKind,
        UInt32 keycode, UInt32 modifiers,
        UInt32 * deadKeyStatePtr);

static int KeycodeToUnicodeViaKCHRResource(
        UniChar * uniChars, int maxChars,
        Ptr kchr, TextEncoding encoding,
        EventKind eKind,
        UInt32 keycode, UInt32 modifiers,
        UInt32 * deadKeyStatePtr);

/*
 *----------------------------------------------------------------------
 *
 * TkMacOSXProcessKeyboardEvent --
 *
 *        This routine processes the event in eventPtr, and
 *        generates the appropriate Tk events from it.
 *
 * Results:
 *        True if event(s) are generated - false otherwise.
 *
 * Side effects:
 *        Additional events may be place on the Tk event queue.
 *
 *----------------------------------------------------------------------
 */

MODULE_SCOPE int
TkMacOSXProcessKeyboardEvent(
        TkMacOSXEvent * eventPtr, 
        MacEventStatus * statusPtr)
{
    static UInt32 savedKeyCode = 0;
    static UInt32 savedModifiers = 0;
    static UniChar savedChar = 0;
    OSStatus     status;
    KeyEventData keyEventData;
    MenuRef   menuRef;
    MenuItemIndex menuItemIndex;
    int eventGenerated;
    UniChar uniChars[5]; /* make this larger, if needed */
    UInt32 uniCharsLen = 0;

    if (!InitKeyData(&keyEventData)) {
        statusPtr->err = 1;
        return false;
    }
    
    /*
     * Because of the way that Tk operates, we can't in general funnel menu
     * accelerators through IsMenuKeyEvent.  Tk treats accelerators as mere
     * decoration, and the user has to install bindings to get them to fire.
     *
     * However, the only way to trigger the Hide & Hide Others functions
     * is by invoking the Menu command for Hide.  So there is no nice way to
     * provide a Tk command to hide the app which would be available for a
     * binding.  So I am going to hijack Command-H and Command-Shift-H 
     * here, and run the menu commands.  Since the HI Guidelines explicitly
     * reserve these for Hide, this isn't such a bad thing.  Also, if you do
     * rebind Command-H to another menu item, Hide will lose its binding.
     * 
     * Note that I don't really do anything at this point, 
     * I just mark stopProcessing as 0 and return, and then the
     * RecieveAndProcessEvent code will dispatch the event to the default
     * handler.
     */

    if ((eventPtr->eKind == kEventRawKeyDown 
	    || eventPtr->eKind == kEventRawKeyRepeat)
	    && IsMenuKeyEvent(tkCurrentAppleMenu, eventPtr->eventRef, 
		    kMenuEventQueryOnly, &menuRef, &menuItemIndex)) {
	MenuCommand menuCmd;

	GetMenuItemCommandID (menuRef, menuItemIndex, &menuCmd);
	switch (menuCmd) {
	    case kHICommandHide:
	    case kHICommandHideOthers:
	    case kHICommandShowAll:
	    case kHICommandPreferences:
	    case kHICommandQuit:
		statusPtr->stopProcessing = 0;
		return 0; /* TODO: may not be on event on queue. */
		break;
	    default:
		break;
	}
    }

    status = GetEventParameter(eventPtr->eventRef, 
            kEventParamKeyMacCharCodes,
            typeChar, NULL,
            sizeof(keyEventData.ch), NULL,
            &keyEventData.ch);
    if (status != noErr) {
#ifdef TK_MAC_DEBUG
        fprintf (stderr, "Failed to retrieve KeyMacCharCodes\n");
#endif
        statusPtr->err = 1;
        return false;
    } 
    status = GetEventParameter(eventPtr->eventRef, 
            kEventParamKeyCode,
            typeUInt32, NULL,
            sizeof(keyEventData.keyCode), NULL,
            &keyEventData.keyCode);
    if (status != noErr) {
#ifdef TK_MAC_DEBUG
        fprintf (stderr, "Failed to retrieve KeyCode\n");
#endif
        statusPtr->err = 1;
        return false;
    }
    status = GetEventParameter(eventPtr->eventRef, 
            kEventParamKeyModifiers,
            typeUInt32, NULL,
            sizeof(keyEventData.keyModifiers), NULL,
            &keyEventData.keyModifiers);
    if (status != noErr) {
#ifdef TK_MAC_DEBUG
        fprintf (stderr, "Failed to retrieve KeyModifiers\n");
#endif
        statusPtr->err = 1;
        return false;
    }

    switch (eventPtr->eKind) {
        case kEventRawKeyUp:
        case kEventRawKeyDown:
        case kEventRawKeyRepeat:
            {
                UInt32 *deadKeyStatePtr;

                if (kEventRawKeyDown == eventPtr->eKind) {
                    deadKeyStatePtr = &deadKeyStateDown;
                } else {
                    deadKeyStatePtr = &deadKeyStateUp;
                }

                uniCharsLen = TkMacOSXKeycodeToUnicode(
                        uniChars, sizeof(uniChars)/sizeof(*uniChars),
                        eventPtr->eKind,
                        keyEventData.keyCode, keyEventData.keyModifiers,
                        deadKeyStatePtr);
            }
    }

    if (kEventRawKeyUp == eventPtr->eKind) {
        /*
         * For some reason the deadkey processing for KeyUp doesn't work
         * sometimes, so we fudge and use the last detected KeyDown.
         */

        if((0 == uniCharsLen) && (0 != savedChar)) {
            uniChars[0] = savedChar;
            uniCharsLen = 1;
        }

        /*
         * Suppress keyup events while we have a deadkey sequence on keydown.
         * We still *do* want to collect deadkey state in this situation if
         * the system provides it, that's why we do this only after
         * TkMacOSXKeycodeToUnicode().
         */

        if (0 != deadKeyStateDown) {
            uniCharsLen = 0;
        }
    }

    keyEventData.message = keyEventData.ch|(keyEventData.keyCode << 8);

    eventGenerated = GenerateKeyEvent(
            eventPtr->eKind, &keyEventData,
            savedKeyCode, savedModifiers,
            uniChars, uniCharsLen);

    savedModifiers = keyEventData.keyModifiers;

    if ((kEventRawKeyDown == eventPtr->eKind) && (uniCharsLen > 0)) {
        savedChar = uniChars[0];
    } else {
        savedChar = 0;
    }
    
    statusPtr->stopProcessing = 1;

    if (eventGenerated == 0) {
        savedKeyCode = keyEventData.message;
        return false;
    } else if (eventGenerated == -1) {
        savedKeyCode = 0;
        statusPtr->stopProcessing = 0;
        return false;
    } else {
        savedKeyCode = 0;
        return true;
    }
}

/*
 *----------------------------------------------------------------------
 *
 * GenerateKeyEvent --
 *
 *        Given Macintosh keyUp, keyDown & autoKey events (in their "raw"
 *        form) and a list of unicode characters this function generates the
 *        appropriate X key events.
 *
 *        Parameter eKind is a raw keyboard event.  e contains the data sent
 *        with the event. savedKeyCode and savedModifiers contain the values
 *        from the last event that came before (see
 *        TkMacOSXProcessKeyboardEvent()).  chars/numChars has the Unicode
 *        characters for which we want to create events.
 *
 * Results:
 *        1 if an event was generated, -1 for any error.
 *
 * Side effects:
 *        Additional events may be place on the Tk event queue.
 *
 *----------------------------------------------------------------------
 */

static int
GenerateKeyEvent(
        UInt32 eKind, 
        KeyEventData * e, 
        UInt32 savedKeyCode,
        UInt32 savedModifiers,
        const UniChar * chars, int numChars)
{
    XEvent event;
    int i;
    
    if (-1 == InitKeyEvent(&event, e, savedKeyCode, savedModifiers)) {
        return -1;
    }

    if (kEventRawKeyModifiersChanged == eKind) {

        if (savedModifiers > e->keyModifiers) {
            event.xany.type = KeyRelease;
        } else {
            event.xany.type = KeyPress;
        }
        
        /* 
         * Use special '-1' to signify a special keycode to our
         * platform specific code in tkMacOSXKeyboard.c.  This is
         * rather like what happens on Windows.
         */
        
        event.xany.send_event = -1;

        /*
         * Set keycode (which was zero) to the changed modifier
         */
        
        event.xkey.keycode = (e->keyModifiers ^ savedModifiers);
        Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);

    } else {

        for (i = 0; i < numChars; ++i) {

            /*
             * Encode one char in the trans_chars array that was already
             * introduced for MS Windows.  Don't encode the string, if it is
             * a control character but was not generated with a real control
             * modifier.  Such control characters get generated by KeyTrans()
             * for special keys, but we rather want to identify those by
             * their KeySyms.
             */

            event.xkey.trans_chars[0] = 0;
            if ((controlKey & e->keyModifiers) || (chars[i] >= ' ')) {
                int done;
                done = Tcl_UniCharToUtf(chars[i],event.xkey.trans_chars);
                event.xkey.trans_chars[done] = 0;
            }

            switch(eKind) {
                case kEventRawKeyDown:
                    event.xany.type = KeyPress;
                    Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
                    break;
                case kEventRawKeyUp:
                    event.xany.type = KeyRelease;
                    Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
                    break;
                case kEventRawKeyRepeat:
                    event.xany.type = KeyRelease;
                    Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
                    event.xany.type = KeyPress;
                    Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
                    break;
                default:
#ifdef TK_MAC_DEBUG
                    fprintf (stderr,
                            "GenerateKeyEvent(): Invalid parameter eKind %d\n",
                            (int) eKind);
#endif
                    return -1;
            } 
        }
    }

    return 1;
}

/*
 *----------------------------------------------------------------------
 *
 * InitKeyData --
 *
 *        This routine initializes a KeyEventData structure by asking the OS
 *        and Tk for all the global information needed here.
 *
 * Results:
 *        True if the current front window can be found in Tk data structures
 *        - false otherwise.
 *
 * Side Effects:
 *        None
 *
 *----------------------------------------------------------------------
 */
static int 
InitKeyData(KeyEventData * keyEventDataPtr)
{
    memset (keyEventDataPtr, 0, sizeof(*keyEventDataPtr));

    keyEventDataPtr->whichWindow = ActiveNonFloatingWindow();
    if (keyEventDataPtr->whichWindow == NULL) {
        return false;
    }
    XQueryPointer(NULL, None, NULL, NULL,
            &keyEventDataPtr->global_x,
            &keyEventDataPtr->global_y,
            &keyEventDataPtr->local_x,
            &keyEventDataPtr->local_y,
            &keyEventDataPtr->state);

    return true;
}

/*
 *----------------------------------------------------------------------
 *
 * InitKeyEvent --
 *
 *        Initialize an XEvent structure by asking Tk for global information.
 *        Also uses a KeyEventData structure and other current state.
 *
 * Results:
 *        1 on success, -1 for any error.
 *
 * Side effects:
 *        Additional events may be place on the Tk event queue.
 *
 *----------------------------------------------------------------------
 */

/* 
 * We have a general problem here.  How do we handle 'Option-char'
 * keypresses?  The problem is that we might want to bind to some of these
 * (e.g. Cmd-Opt-d is 'uncomment' in Alpha).  OTOH Option-d actually produces
 * a real character on MacOS, namely a mathematical delta.
 *
 * The current behaviour is that a binding goes by the combinations of
 * modifiers and base keysym, that is Option-d.  The string value of the
 * event is the mathematical delta character, so if no binding calls
 * [break], the text widget will insert that character.
 *
 * Note that this is similar to control combinations on all platforms.  They
 * also generate events that have the base character as keysym and a real
 * control character as character value.  So Ctrl+C gets us the keysym XK_C,
 * the modifier Control (so you can bind <Control-C>) and a string value as
 * "\u0003".
 * 
 * For a different solutions we may want for the event to contain keysyms for
 * *both* the 'Opt-d' side of things and the mathematical delta.  Then a
 * binding on Opt-d will trigger, but a binding on mathematical delta would
 * also trigger.  This would require changes in the core, though.
 */

static int
InitKeyEvent(
        XEvent * eventPtr,
        KeyEventData * e, 
        UInt32 savedKeyCode,
        UInt32 savedModifiers)
{
    Window window;
    Tk_Window tkwin;
    TkDisplay *dispPtr;
    
    /*
     * The focus must be in the FrontWindow on the Macintosh.
     * We then query Tk to determine the exact Tk window
     * that owns the focus.
     */

    window = TkMacOSXGetXWindow(e->whichWindow);
    dispPtr = TkGetDisplayList();
    tkwin = Tk_IdToWindow(dispPtr->display, window);
    
    if (tkwin == NULL) {
#ifdef TK_MAC_DEBUG
        fprintf(stderr,"tkwin == NULL, %d\n", __LINE__);
#endif
        return -1;
    }
    
    tkwin = (Tk_Window) ((TkWindow *) tkwin)->dispPtr->focusPtr;
    if (tkwin == NULL) {
#ifdef TK_MAC_DEBUG
        fprintf(stderr,"tkwin == NULL, %d\n", __LINE__);
#endif
        return -1;
    }

    eventPtr->xany.send_event = false;
    eventPtr->xany.serial = Tk_Display(tkwin)->request;

    eventPtr->xkey.same_screen = true;
    eventPtr->xkey.subwindow = None;
    eventPtr->xkey.time = TkpGetMS();
    eventPtr->xkey.x_root = e->global_x;
    eventPtr->xkey.y_root = e->global_y;
    eventPtr->xkey.window = Tk_WindowId(tkwin);
    eventPtr->xkey.display = Tk_Display(tkwin);
    eventPtr->xkey.root = XRootWindow(Tk_Display(tkwin), 0);
    eventPtr->xkey.state =  e->state;
    eventPtr->xkey.trans_chars[0] = 0;

    Tk_TopCoordsToWindow(
            tkwin, e->local_x, e->local_y, 
            &eventPtr->xkey.x, &eventPtr->xkey.y);

    eventPtr->xkey.keycode = e->ch |
        ((savedKeyCode & charCodeMask) << 8) |
        ((e->message&keyCodeMask) << 8);

    return 1;
}


/*
 * If we have old headers, we need to define these types and constants
 * ourself.  We use preprocessor macros instead of enums and typedefs,
 * because macros work even in case of version misunderstandings, while
 * duplicate enums and typedefs would give errrors.
 */

#if MAC_OS_X_VERSION_MAX_ALLOWED < 1020
#define KeyboardLayoutRef Ptr
#define KeyboardLayoutPropertyTag UInt32
#define kKLKCHRData 0
#define kKLuchrData 1
#define kKLIdentifier 2
#endif

/*
 *----------------------------------------------------------------------
 *
 * GetKeyboardLayout --
 *
 *      Queries the OS for a pointer to a keyboard resource.
 *
 *      This function works with the keyboard layout switch menu.  It uses
 *      Keyboard Layout Services, where available.
 *
 * Results:
 *      1 if there is returned a Unicode 'uchr' resource in *resourcePtr, 0
 *      if it is a classic 'KCHR' resource.  A pointer to the actual resource
 *      data goes into *resourcePtr.  If the resource is a 'KCHR' resource,
 *      the corresponding Mac encoding goes into *encodingPtr.
 *
 * Side effects:
 *      Sets some internal static variables.
 *
 *----------------------------------------------------------------------
 */

static int
GetKeyboardLayout (Ptr * resourcePtr, TextEncoding * encodingPtr)
{
    static KeyboardLayoutRef lastLayout = NULL;
    static SInt32 lastLayoutId;
    static TextEncoding lastEncoding = kTextEncodingMacRoman;
    static Ptr uchr = NULL;
    static Ptr KCHR = NULL;
    static Handle handle = NULL;

    int hasLayoutChanged = false;
    KeyboardLayoutRef currentLayout = NULL;
    SInt32 currentLayoutId = 0;
    ScriptCode currentKeyScript;

    /*
     * Several code branches need this information.
     */

    currentKeyScript = GetScriptManagerVariable(smKeyScript);

    TkMacOSXInitNamedSymbol(HIToolbox, OSStatus, KLGetCurrentKeyboardLayout,
            KeyboardLayoutRef*);
    TkMacOSXInitNamedSymbol(HIToolbox, OSStatus, KLGetKeyboardLayoutProperty,
            KeyboardLayoutRef, KeyboardLayoutPropertyTag, const void**);
    if (KLGetCurrentKeyboardLayout && KLGetKeyboardLayoutProperty) {

        /*
         * Use the Keyboard Layout Services (these functions only exist since
         * 10.2).
         */

        KLGetCurrentKeyboardLayout(&currentLayout);

        if (currentLayout != NULL) {

            /*
             * The layout pointer could in theory be the same for different
             * layouts, only the id gives us the information that the
             * keyboard has actually changed.  OTOH the layout object can
             * also change and it could still be the same layoutid.
             */

            KLGetKeyboardLayoutProperty(currentLayout, kKLIdentifier,
                    (const void**)&currentLayoutId);

            if ((lastLayout != currentLayout)
                    || (lastLayoutId != currentLayoutId)) {

#ifdef TK_MAC_DEBUG_KEYBOARD
                fprintf (stderr, "GetKeyboardLayout(): Use KLS\n");
#endif

                hasLayoutChanged = true;

                /*
                 * Reinitialize all relevant variables.
                 */

                lastLayout = currentLayout;
                lastLayoutId = currentLayoutId;
                uchr = NULL;
                KCHR = NULL;

                if ((KLGetKeyboardLayoutProperty(currentLayout,
                                        kKLuchrData, (const void**)&uchr)
                                == noErr)
                        && (uchr != NULL)) {
                    /* done */
                } else if ((KLGetKeyboardLayoutProperty(currentLayout,
                                        kKLKCHRData, (const void**)&KCHR)
                                == noErr)
                        && (KCHR != NULL)) {
                    /* done */
                }
            }
        }

    } else {

        /*
         * Use the classic approach as shown in Apple code samples, loading
         * the keyboard resources directly.  This is broken for 10.3 and
         * possibly already in 10.2.
         */

        currentLayoutId = GetScriptVariable(currentKeyScript,smScriptKeys);

        if ((lastLayout == NULL) || (lastLayoutId != currentLayoutId)) {

#ifdef TK_MAC_DEBUG_KEYBOARD
            fprintf (stderr, "GetKeyboardLayout(): Use GetResource()\n");
#endif

            hasLayoutChanged = true;

            /*
             * Reinitialize all relevant variables.
             */

            lastLayout = (KeyboardLayoutRef)-1; 
            lastLayoutId = currentLayoutId;
            uchr = NULL;
            KCHR = NULL;

            /*
             * Get the new layout resource in the classic way.
             */

            if (handle != NULL) {
                HUnlock(handle);
            }
            
            if ((handle = GetResource('uchr',currentLayoutId)) != NULL) {
                HLock(handle);
                uchr = *handle;
            } else if ((handle = GetResource('KCHR',currentLayoutId)) != NULL) {
                HLock(handle);
                KCHR = *handle;
            }
        }
    }

    if (hasLayoutChanged) {

#ifdef TK_MAC_DEBUG_KEYBOARD
        if (KCHR != NULL) {
            fprintf (stderr, "GetKeyboardLayout(): New 'KCHR' layout %d\n",
                    (int) (short) currentLayoutId);
        } else if (uchr != NULL) {
            fprintf (stderr, "GetKeyboardLayout(): New 'uchr' layout %d\n",
                    (int) (short) currentLayoutId);
        } else {
            fprintf (stderr, "GetKeyboardLayout(): Use cached layout "
                    "(should have been %d)\n",
                    (int) (short) currentLayoutId);
        }
#endif

        deadKeyStateUp = deadKeyStateDown = 0;

        /*
         * If we did get a new 'KCHR', compute its encoding and put it into
         * lastEncoding.
         *
         * If we didn't get a new 'KCHR' and if we have no 'uchr' either, get
         * some 'KCHR' from the OS cache and leave lastEncoding at its
         * current value.  This should better not happen, it doesn't really
         * work.
         */

        if (KCHR != NULL) {
            lastEncoding = GetKCHREncoding(currentKeyScript, currentLayoutId);
#ifdef TK_MAC_DEBUG_KEYBOARD
            fprintf (stderr, "GetKeyboardLayout(): New 'KCHR' encoding %lu "
                    "(%lu + 0x%lX)\n",
                    lastEncoding, lastEncoding & 0xFFFFL,
                    lastEncoding & ~0xFFFFL);
#endif
        } else if (uchr == NULL) {
            KCHR = (Ptr) GetScriptManagerVariable(smKCHRCache);
        }
    }

    if (uchr != NULL) {
        *resourcePtr = uchr;
        return 1;
    } else {
        *resourcePtr = KCHR;
        *encodingPtr = lastEncoding;
        return 0;
    }
}


/*
 *----------------------------------------------------------------------
 *
 * GetKCHREncoding --
 *
 *      Upgrade a WorldScript code to a TEC encoding based on the keyboard
 *      layout id.
 *
 * Results:
 *      The TEC code that corresponds best to the combination of WorldScript
 *      code and 'KCHR' id.
 *
 * Side effects:
 *      None.
 *
 * Rationale and Notes:
 *      WorldScript codes are sometimes not unique encodings.  E.g. Icelandic
 *      uses script smRoman (0), but the actual encoding is
 *      kTextEncodingMacIcelandic (37).  ftp://ftp.unicode.org/Public
 *      /MAPPINGS/VENDORS/APPLE/README.TXT has a good summary of these
 *      variants.  So we need to upgrade the script to an encoding with
 *      GetTextEncodingFromScriptInfo().
 *
 *      'KCHR' ids are usually region codes (see the comments in Script.h).
 *      Where they are not, we get a paramErr from the OS function and have
 *      appropriate fallbacks.
 *
 *----------------------------------------------------------------------
 */

static TextEncoding
GetKCHREncoding(ScriptCode script, SInt32 layoutid)
{
    RegionCode region = layoutid;
    TextEncoding encoding = script;

    if (GetTextEncodingFromScriptInfo(script, kTextLanguageDontCare, region,
                    &encoding) == noErr) {
        return encoding;
    }

    /*
     * GetTextEncodingFromScriptInfo() doesn't know about more exotic
     * layouts.  This provides a fallback for good measure.  In an ideal
     * world, exotic layouts would always provide a 'uchr' resource anyway,
     * so we wouldn't need this.
     *
     * We can add more keyboard layouts, if we get actual complaints.  Farsi
     * or other Celtic/Gaelic layouts would be candidates.
     */

    switch (layoutid) {

        /*
         * Icelandic and Faroese (planned).  These layouts are sold by Apple
         * Iceland for legacy applications.
         */

        case 1800: case 1821:
            return kTextEncodingMacIcelandic;

        /*
         * Irish and Welsh.  These layouts are mentioned in <Script.h>.
         *
         * FIXME: This may have to be kTextEncodingMacGaelic instead, but I
         * can't locate layouts of this type for testing.
         */

        case 581: case 779:
            return kTextEncodingMacCeltic;
    }
    
    /*
     * The valid script codes are also the valid default encoding codes, so
     * if nothing else helps, fall back on those.
     */

    return script;
}


/*
 *----------------------------------------------------------------------
 *
 * KeycodeToUnicodeViaUnicodeResource --
 *
 *        Given MacOS key event data this function generates the Unicode
 *        characters.  It does this using a 'uchr' and the UCKeyTranslate
 *        API.
 *
 *        The parameter deadKeyStatePtr can be NULL, if no deadkey handling
 *        is needed.
 *
 *        Tested and known to work with US, Hebrew, Greek and Russian layouts
 *        as well as "Unicode Hex Input".
 *
 * Results:
 *        The number of characters generated if any, 0 if we are waiting for
 *        another byte of a dead-key sequence. Fills in the uniChars array
 *        with a Unicode string.
 *
 * Side Effects:
 *        None
 *
 *----------------------------------------------------------------------
 */

static int
KeycodeToUnicodeViaUnicodeResource(
        UniChar * uniChars, int maxChars,
        Ptr uchr,
        EventKind eKind,
        UInt32 keycode, UInt32 modifiers,
        UInt32 * deadKeyStatePtr)
{
    int action;
    unsigned long keyboardType;
    OptionBits options = 0;
    UInt32 dummy_state;
    UniCharCount actuallength; 
    OSStatus status;

    keycode &= 0xFF;
    modifiers = (modifiers >> 8) & 0xFF;
    keyboardType = LMGetKbdType();

    if (NULL==deadKeyStatePtr) {
        options = kUCKeyTranslateNoDeadKeysMask;
        dummy_state = 0;
        deadKeyStatePtr = &dummy_state;
    }

    switch(eKind) {     
        case kEventRawKeyDown:
            action = kUCKeyActionDown;
            break;
        case kEventRawKeyUp:
            action = kUCKeyActionUp;
            break;
        case kEventRawKeyRepeat:
            action = kUCKeyActionAutoKey;
            break;
        default:
#ifdef TK_MAC_DEBUG
            fprintf (stderr,
                    "KeycodeToUnicodeViaUnicodeResource(): "
                    "Invalid parameter eKind %d\n",
                    (int) eKind);
#endif
            return 0;
    }

    status = UCKeyTranslate(
            (const UCKeyboardLayout *) uchr,
            keycode, action, modifiers, keyboardType,
            options, deadKeyStatePtr,
            maxChars, &actuallength, uniChars);

    if ((0 == actuallength) && (0 != *deadKeyStatePtr)) {
        /*
         * More data later
         */
        
        return 0; 
    }
    
    /*
     * some IMEs leave residue :-(
     */
    
    *deadKeyStatePtr = 0; 

    if (noErr != status) {
#ifdef TK_MAC_DEBUG
        fprintf(stderr,"UCKeyTranslate failed: %d", (int) status);
#endif
        actuallength = 0;
    }

    return actuallength;
}


/*
 *----------------------------------------------------------------------
 *
 * KeycodeToUnicodeViaKCHRResource --
 *
 *        Given MacOS key event data this function generates the Unicode
 *        characters.  It does this using a 'KCHR' and the KeyTranslate API.
 *
 *        The parameter deadKeyStatePtr can be NULL, if no deadkey handling
 *        is needed.
 *
 * Results:
 *        The number of characters generated if any, 0 if we are waiting for
 *        another byte of a dead-key sequence. Fills in the uniChars array
 *        with a Unicode string.
 *
 * Side Effects:
 *        None
 *
 *----------------------------------------------------------------------
 */

static int
KeycodeToUnicodeViaKCHRResource(
        UniChar * uniChars, int maxChars,
        Ptr kchr, TextEncoding encoding,
        EventKind eKind,
        UInt32 keycode, UInt32 modifiers,
        UInt32 * deadKeyStatePtr)
{
    UInt32 result;
    char macBuff[3];
    char * macStr;
    int macStrLen;
    UInt32 dummy_state = 0;


    if (NULL == deadKeyStatePtr) {
        deadKeyStatePtr = &dummy_state;
    }

    keycode |= modifiers;
    result = KeyTranslate(kchr, keycode, deadKeyStatePtr);

    if ((0 == result) && (0 != dummy_state)) {
        /*
         * 'dummy_state' gets only filled if the caller did not want deadkey
         * processing (deadKeyStatePtr was NULL originally), but we still
         * have a deadkey.  We just push the keycode for the space bar to get
         * the real key value.
         */

        result = KeyTranslate(kchr, 0x31, deadKeyStatePtr);
        *deadKeyStatePtr = 0;
    }

    if ((0 == result) && (0 != *deadKeyStatePtr)) {
        /*
         * More data later
         */
        
        return 0; 
    }

    macBuff[0] = (char) (result >> 16);
    macBuff[1] = (char)  result;
    macBuff[2] = 0;

    if (0 != macBuff[0]) {
        /*
         * If the first byte is valid, the second is too
         */
        
        macStr = macBuff;
        macStrLen = 2;
    } else if (0 != macBuff[1]) {
        /*
         * Only the second is valid
         */
        
        macStr = macBuff+1;
        macStrLen = 1;
    } else {
        /*
         * No valid bytes at all -- shouldn't happen
         */
        
        macStr = NULL;
        macStrLen = 0;
    }

    if (macStrLen <= 0) {
        return 0;
    } else {

        /*
         * Use the CFString conversion routines.  This is the easiest and
         * most compatible way to get from an 8-bit string and a MacOS script
         * code to a Unicode string.
         *
         * FIXME: The system ships with an Irish 'KCHR' but without the
         * corresponding macCeltic encoding, which triggers the error below.
         * Tcl doesn't have the macCeltic encoding either right now, so until
         * we get that, we can just as well stick to this code.  The right
         * fix would be to use the Tcl encodings and add macCeltic and
         * probably others there.  Suitable Unicode data files for the
         * missing encodings are available from www.evertype.com.
         */
        
        CFStringRef cfString;
        int uniStrLen;

        cfString = CFStringCreateWithCStringNoCopy(
            NULL, macStr, encoding, kCFAllocatorNull);
        if (cfString == NULL) {
#ifdef TK_MAC_DEBUG
            fprintf(stderr, "CFString: Can't convert with encoding %d\n",
                    (int) encoding);
#endif
            return 0;
        }

        uniStrLen = CFStringGetLength(cfString);
        if (uniStrLen > maxChars) {
            uniStrLen = maxChars;
        }
        CFStringGetCharacters(cfString, CFRangeMake(0,uniStrLen), uniChars);
        CFRelease(cfString);

        return uniStrLen;
    }
}


/*
 *----------------------------------------------------------------------
 *
 * TkMacOSXKeycodeToUnicode --
 *
 *        Given MacOS key event data this function generates the Unicode
 *        characters.  It does this using OS resources and APIs.
 *
 *        The parameter deadKeyStatePtr can be NULL, if no deadkey handling
 *        is needed.
 *
 *        This function is called from XKeycodeToKeysym() in
 *        tkMacOSKeyboard.c.
 *
 * Results:
 *        The number of characters generated if any, 0 if we are waiting for
 *        another byte of a dead-key sequence. Fills in the uniChars array
 *        with a Unicode string.
 *
 * Side Effects:
 *        None
 *
 *----------------------------------------------------------------------
 */

MODULE_SCOPE int
TkMacOSXKeycodeToUnicode(
        UniChar * uniChars, int maxChars,
        EventKind eKind,
        UInt32 keycode, UInt32 modifiers,
        UInt32 * deadKeyStatePtr)
{
    Ptr resource = NULL;
    TextEncoding encoding;
    int len;


    if (GetKeyboardLayout(&resource,&encoding)) {
        len = KeycodeToUnicodeViaUnicodeResource(
            uniChars, maxChars, resource, eKind,
            keycode, modifiers, deadKeyStatePtr);
    } else {
        len = KeycodeToUnicodeViaKCHRResource(
            uniChars, maxChars, resource, encoding, eKind,
            keycode, modifiers, deadKeyStatePtr);
    }

    return len;
}



/*
 *----------------------------------------------------------------------
 *
 * XGrabKeyboard --
 *
 *        Simulates a keyboard grab by setting the focus.
 *
 * Results:
 *        Always returns GrabSuccess.
 *
 * Side effects:
 *        Sets the keyboard focus to the specified window.
 *
 *----------------------------------------------------------------------
 */

int
XGrabKeyboard(
    Display* display,
    Window grab_window,
    Bool owner_events,
    int pointer_mode,
    int keyboard_mode,
    Time time)
{
    gKeyboardWinPtr = Tk_IdToWindow(display, grab_window);
    return GrabSuccess;
}

/*
 *----------------------------------------------------------------------
 *
 * XUngrabKeyboard --
 *
 *        Releases the simulated keyboard grab.
 *
 * Results:
 *        None.
 *
 * Side effects:
 *        Sets the keyboard focus back to the value before the grab.
 *
 *----------------------------------------------------------------------
 */

void
XUngrabKeyboard(
    Display* display,
    Time time)
{
    gKeyboardWinPtr = NULL;
}

/*
 *----------------------------------------------------------------------
 *
 * TkMacOSXGetCapture --
 *
 * Results:
 *      Returns the current grab window
 * Side effects:
 *        None.
 *
 */
Tk_Window
TkMacOSXGetCapture()
{
    return gGrabWinPtr;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpSetCapture --
 *
 *        This function captures the mouse so that all future events
 *        will be reported to this window, even if the mouse is outside
 *        the window.  If the specified window is NULL, then the mouse
 *        is released. 
 *
 * Results:
 *        None.
 *
 * Side effects:
 *        Sets the capture flag and captures the mouse.
 *
 *----------------------------------------------------------------------
 */

void
TkpSetCapture(
    TkWindow *winPtr)                        /* Capture window, or NULL. */
{
    while ((winPtr != NULL) && !Tk_IsTopLevel(winPtr)) {
        winPtr = winPtr->parentPtr;
    }
    gGrabWinPtr = (Tk_Window) winPtr;
}

/*
 *----------------------------------------------------------------------
 *
 * Tk_SetCaretPos --
 *
 *      This enables correct placement of the XIM caret.  This is called
 *      by widgets to indicate their cursor placement, and the caret
 *      location is used by TkpGetString to place the XIM caret.
 *
 * Results:
 *      None
 *
 * Side effects:
 *      None
 *
 *----------------------------------------------------------------------
 */

void
Tk_SetCaretPos(tkwin, x, y, height)
    Tk_Window tkwin;
    int       x;
    int       y;
    int       height;
{
}

/*
 *----------------------------------------------------------------------
 *
 * TkMacOSXInitKeyboard --
 *
 *	  This procedure initializes the keyboard layout.
 *
 * Results:
 *	  None.
 *
 * Side effects:
 *	  None.
 *
 *----------------------------------------------------------------------
 */

MODULE_SCOPE void
TkMacOSXInitKeyboard (
	Tcl_Interp *interp)
{
    Ptr resource;
    TextEncoding encoding;
    
    GetKeyboardLayout(&resource,&encoding);
}