-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathmidend.c
2126 lines (1875 loc) · 61.6 KB
/
midend.c
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
/*
* midend.c: general middle fragment sitting between the
* platform-specific front end and game-specific back end.
* Maintains a move list, takes care of Undo and Redo commands, and
* processes standard keystrokes for undo/redo/new/quit.
*/
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include <ctype.h>
#include "puzzles.h"
enum { DEF_PARAMS, DEF_SEED, DEF_DESC }; /* for midend_game_id_int */
enum { NEWGAME, MOVE, SOLVE, RESTART };/* for midend_state_entry.movetype */
#define special(type) ( (type) != MOVE )
struct midend_state_entry {
game_state *state;
char *movestr;
int movetype;
};
struct midend {
frontend *frontend;
random_state *random;
const game *ourgame;
game_params **presets;
char **preset_names, **preset_encodings;
int npresets, presetsize;
/*
* `desc' and `privdesc' deserve a comment.
*
* `desc' is the game description as presented to the user when
* they ask for Game -> Specific. `privdesc', if non-NULL, is a
* different game description used to reconstruct the initial
* game_state when de-serialising. If privdesc is NULL, `desc'
* is used for both.
*
* For almost all games, `privdesc' is NULL and never used. The
* exception (as usual) is Mines: the initial game state has no
* squares open at all, but after the first click `desc' is
* rewritten to describe a game state with an initial click and
* thus a bunch of squares open. If we used that desc to
* serialise and deserialise, then the initial game state after
* deserialisation would look unlike the initial game state
* beforehand, and worse still execute_move() might fail on the
* attempted first click. So `privdesc' is also used in this
* case, to provide a game description describing the same
* fixed mine layout _but_ no initial click. (These game IDs
* may also be typed directly into Mines if you like.)
*/
char *desc, *privdesc, *seedstr;
char *aux_info;
enum { GOT_SEED, GOT_DESC, GOT_NOTHING } genmode;
int nstates, statesize, statepos;
struct midend_state_entry *states;
game_params *params, *curparams;
game_drawstate *drawstate;
game_ui *ui;
game_state *oldstate;
float anim_time, anim_pos;
float flash_time, flash_pos;
int dir;
int timing;
float elapsed;
char *laststatus;
drawing *drawing;
int pressed_mouse_button;
int preferred_tilesize, tilesize, winwidth, winheight;
void (*game_id_change_notify_function)(void *);
void *game_id_change_notify_ctx;
};
#define ensure(me) do { \
if ((me)->nstates >= (me)->statesize) { \
(me)->statesize = (me)->nstates + 128; \
(me)->states = sresize((me)->states, (me)->statesize, \
struct midend_state_entry); \
} \
} while (0)
void midend_reset_tilesize(midend *me)
{
me->preferred_tilesize = me->ourgame->preferred_tilesize;
{
/*
* Allow an environment-based override for the default tile
* size by defining a variable along the lines of
* `NET_TILESIZE=15'.
*/
char buf[80], *e;
int j, k, ts;
sprintf(buf, "%s_TILESIZE", me->ourgame->name);
for (j = k = 0; buf[j]; j++)
if (!isspace((unsigned char)buf[j]))
buf[k++] = toupper((unsigned char)buf[j]);
buf[k] = '\0';
if ((e = getenv(buf)) != NULL && sscanf(e, "%d", &ts) == 1 && ts > 0)
me->preferred_tilesize = ts;
}
}
midend *midend_new(frontend *fe, const game *ourgame,
const drawing_api *drapi, void *drhandle)
{
midend *me = snew(midend);
void *randseed;
int randseedsize;
get_random_seed(&randseed, &randseedsize);
me->frontend = fe;
me->ourgame = ourgame;
me->random = random_new(randseed, randseedsize);
me->nstates = me->statesize = me->statepos = 0;
me->states = NULL;
me->params = ourgame->default_params();
me->game_id_change_notify_function = NULL;
me->game_id_change_notify_ctx = NULL;
/*
* Allow environment-based changing of the default settings by
* defining a variable along the lines of `NET_DEFAULT=25x25w'
* in which the value is an encoded parameter string.
*/
{
char buf[80], *e;
int j, k;
sprintf(buf, "%s_DEFAULT", me->ourgame->name);
for (j = k = 0; buf[j]; j++)
if (!isspace((unsigned char)buf[j]))
buf[k++] = toupper((unsigned char)buf[j]);
buf[k] = '\0';
if ((e = getenv(buf)) != NULL)
me->ourgame->decode_params(me->params, e);
}
me->curparams = NULL;
me->desc = me->privdesc = NULL;
me->seedstr = NULL;
me->aux_info = NULL;
me->genmode = GOT_NOTHING;
me->drawstate = NULL;
me->oldstate = NULL;
me->presets = NULL;
me->preset_names = NULL;
me->preset_encodings = NULL;
me->npresets = me->presetsize = 0;
me->anim_time = me->anim_pos = 0.0F;
me->flash_time = me->flash_pos = 0.0F;
me->dir = 0;
me->ui = NULL;
me->pressed_mouse_button = 0;
me->laststatus = NULL;
me->timing = FALSE;
me->elapsed = 0.0F;
me->tilesize = me->winwidth = me->winheight = 0;
if (drapi)
me->drawing = drawing_new(drapi, me, drhandle);
else
me->drawing = NULL;
midend_reset_tilesize(me);
sfree(randseed);
return me;
}
const game *midend_which_game(midend *me)
{
return me->ourgame;
}
static void midend_purge_states(midend *me)
{
while (me->nstates > me->statepos) {
me->ourgame->free_game(me->states[--me->nstates].state);
if (me->states[me->nstates].movestr)
sfree(me->states[me->nstates].movestr);
}
}
static void midend_free_game(midend *me)
{
while (me->nstates > 0) {
me->nstates--;
me->ourgame->free_game(me->states[me->nstates].state);
sfree(me->states[me->nstates].movestr);
}
if (me->drawstate)
me->ourgame->free_drawstate(me->drawing, me->drawstate);
}
void midend_free(midend *me)
{
int i;
midend_free_game(me);
if (me->drawing)
drawing_free(me->drawing);
random_free(me->random);
sfree(me->states);
sfree(me->desc);
sfree(me->privdesc);
sfree(me->seedstr);
sfree(me->aux_info);
me->ourgame->free_params(me->params);
if (me->npresets) {
for (i = 0; i < me->npresets; i++) {
sfree(me->presets[i]);
sfree(me->preset_names[i]);
sfree(me->preset_encodings[i]);
}
sfree(me->presets);
sfree(me->preset_names);
sfree(me->preset_encodings);
}
if (me->ui)
me->ourgame->free_ui(me->ui);
if (me->curparams)
me->ourgame->free_params(me->curparams);
sfree(me->laststatus);
sfree(me);
}
static void midend_size_new_drawstate(midend *me)
{
/*
* Don't even bother, if we haven't worked out our tile size
* anyway yet.
*/
if (me->tilesize > 0) {
me->ourgame->compute_size(me->params, me->tilesize,
&me->winwidth, &me->winheight);
me->ourgame->set_size(me->drawing, me->drawstate,
me->params, me->tilesize);
}
}
void midend_size(midend *me, int *x, int *y, int user_size)
{
int min, max;
int rx, ry;
/*
* We can't set the size on the same drawstate twice. So if
* we've already sized one drawstate, we must throw it away and
* create a new one.
*/
if (me->drawstate && me->tilesize > 0) {
me->ourgame->free_drawstate(me->drawing, me->drawstate);
me->drawstate = me->ourgame->new_drawstate(me->drawing,
me->states[0].state);
}
/*
* Find the tile size that best fits within the given space. If
* `user_size' is TRUE, we must actually find the _largest_ such
* tile size, in order to get as close to the user's explicit
* request as possible; otherwise, we bound above at the game's
* preferred tile size, so that the game gets what it wants
* provided that this doesn't break the constraint from the
* front-end (which is likely to be a screen size or similar).
*/
if (user_size) {
max = 1;
do {
max *= 2;
me->ourgame->compute_size(me->params, max, &rx, &ry);
} while (rx <= *x && ry <= *y);
} else
max = me->preferred_tilesize + 1;
min = 1;
/*
* Now binary-search between min and max. We're looking for a
* boundary rather than a value: the point at which tile sizes
* stop fitting within the given dimensions. Thus, we stop when
* max and min differ by exactly 1.
*/
while (max - min > 1) {
int mid = (max + min) / 2;
me->ourgame->compute_size(me->params, mid, &rx, &ry);
if (rx <= *x && ry <= *y)
min = mid;
else
max = mid;
}
/*
* Now `min' is a valid size, and `max' isn't. So use `min'.
*/
me->tilesize = min;
if (user_size)
/* If the user requested a change in size, make it permanent. */
me->preferred_tilesize = me->tilesize;
midend_size_new_drawstate(me);
*x = me->winwidth;
*y = me->winheight;
}
int midend_tilesize(midend *me) { return me->tilesize; }
void midend_set_params(midend *me, game_params *params)
{
me->ourgame->free_params(me->params);
me->params = me->ourgame->dup_params(params);
}
game_params *midend_get_params(midend *me)
{
return me->ourgame->dup_params(me->params);
}
static void midend_set_timer(midend *me)
{
me->timing = (me->ourgame->is_timed &&
me->ourgame->timing_state(me->states[me->statepos-1].state,
me->ui));
if (me->timing || me->flash_time || me->anim_time)
activate_timer(me->frontend);
else
deactivate_timer(me->frontend);
}
void midend_force_redraw(midend *me)
{
if (me->drawstate)
me->ourgame->free_drawstate(me->drawing, me->drawstate);
me->drawstate = me->ourgame->new_drawstate(me->drawing,
me->states[0].state);
midend_size_new_drawstate(me);
midend_redraw(me);
}
void midend_new_game(midend *me)
{
midend_free_game(me);
assert(me->nstates == 0);
if (me->genmode == GOT_DESC) {
me->genmode = GOT_NOTHING;
} else {
random_state *rs;
if (me->genmode == GOT_SEED) {
me->genmode = GOT_NOTHING;
} else {
/*
* Generate a new random seed. 15 digits comes to about
* 48 bits, which should be more than enough.
*
* I'll avoid putting a leading zero on the number,
* just in case it confuses anybody who thinks it's
* processed as an integer rather than a string.
*/
char newseed[16];
int i;
newseed[15] = '\0';
newseed[0] = '1' + (char)random_upto(me->random, 9);
for (i = 1; i < 15; i++)
newseed[i] = '0' + (char)random_upto(me->random, 10);
sfree(me->seedstr);
me->seedstr = dupstr(newseed);
if (me->curparams)
me->ourgame->free_params(me->curparams);
me->curparams = me->ourgame->dup_params(me->params);
}
sfree(me->desc);
sfree(me->privdesc);
sfree(me->aux_info);
me->aux_info = NULL;
rs = random_new(me->seedstr, strlen(me->seedstr));
/*
* If this midend has been instantiated without providing a
* drawing API, it is non-interactive. This means that it's
* being used for bulk game generation, and hence we should
* pass the non-interactive flag to new_desc.
*/
me->desc = me->ourgame->new_desc(me->curparams, rs,
&me->aux_info, (me->drawing != NULL));
me->privdesc = NULL;
random_free(rs);
}
ensure(me);
/*
* It might seem a bit odd that we're using me->params to
* create the initial game state, rather than me->curparams
* which is better tailored to this specific game and which we
* always know.
*
* It's supposed to be an invariant in the midend that
* me->params and me->curparams differ in no aspect that is
* important after generation (i.e. after new_desc()). By
* deliberately passing the _less_ specific of these two
* parameter sets, we provoke play-time misbehaviour in the
* case where a game has failed to encode a play-time parameter
* in the non-full version of encode_params().
*/
me->states[me->nstates].state =
me->ourgame->new_game(me, me->params, me->desc);
/*
* As part of our commitment to self-testing, test the aux
* string to make sure nothing ghastly went wrong.
*/
if (me->ourgame->can_solve && me->aux_info) {
game_state *s;
char *msg, *movestr;
msg = NULL;
movestr = me->ourgame->solve(me->states[0].state,
me->states[0].state,
me->aux_info, &msg);
assert(movestr && !msg);
s = me->ourgame->execute_move(me->states[0].state, movestr);
assert(s);
me->ourgame->free_game(s);
sfree(movestr);
}
me->states[me->nstates].movestr = NULL;
me->states[me->nstates].movetype = NEWGAME;
me->nstates++;
me->statepos = 1;
me->drawstate = me->ourgame->new_drawstate(me->drawing,
me->states[0].state);
midend_size_new_drawstate(me);
me->elapsed = 0.0F;
if (me->ui)
me->ourgame->free_ui(me->ui);
me->ui = me->ourgame->new_ui(me->states[0].state);
midend_set_timer(me);
me->pressed_mouse_button = 0;
if (me->game_id_change_notify_function)
me->game_id_change_notify_function(me->game_id_change_notify_ctx);
}
int midend_can_undo(midend *me)
{
return (me->statepos > 1);
}
int midend_can_redo(midend *me)
{
return (me->statepos < me->nstates);
}
static int midend_undo(midend *me)
{
if (me->statepos > 1) {
if (me->ui)
me->ourgame->changed_state(me->ui,
me->states[me->statepos-1].state,
me->states[me->statepos-2].state);
me->statepos--;
me->dir = -1;
return 1;
} else
return 0;
}
static int midend_redo(midend *me)
{
if (me->statepos < me->nstates) {
if (me->ui)
me->ourgame->changed_state(me->ui,
me->states[me->statepos-1].state,
me->states[me->statepos].state);
me->statepos++;
me->dir = +1;
return 1;
} else
return 0;
}
static void midend_finish_move(midend *me)
{
float flashtime;
/*
* We do not flash if the later of the two states is special.
* This covers both forward Solve moves and backward (undone)
* Restart moves.
*/
if ((me->oldstate || me->statepos > 1) &&
((me->dir > 0 && !special(me->states[me->statepos-1].movetype)) ||
(me->dir < 0 && me->statepos < me->nstates &&
!special(me->states[me->statepos].movetype)))) {
flashtime = me->ourgame->flash_length(me->oldstate ? me->oldstate :
me->states[me->statepos-2].state,
me->states[me->statepos-1].state,
me->oldstate ? me->dir : +1,
me->ui);
if (flashtime > 0) {
me->flash_pos = 0.0F;
me->flash_time = flashtime;
}
}
if (me->oldstate)
me->ourgame->free_game(me->oldstate);
me->oldstate = NULL;
me->anim_pos = me->anim_time = 0;
me->dir = 0;
midend_set_timer(me);
}
void midend_stop_anim(midend *me)
{
if (me->oldstate || me->anim_time != 0) {
midend_finish_move(me);
midend_redraw(me);
}
}
void midend_restart_game(midend *me)
{
game_state *s;
midend_stop_anim(me);
assert(me->statepos >= 1);
if (me->statepos == 1)
return; /* no point doing anything at all! */
/*
* During restart, we reconstruct the game from the (public)
* game description rather than from states[0], because that
* way Mines gets slightly more sensible behaviour (restart
* goes to _after_ the first click so you don't have to
* remember where you clicked).
*/
s = me->ourgame->new_game(me, me->params, me->desc);
/*
* Now enter the restarted state as the next move.
*/
midend_stop_anim(me);
midend_purge_states(me);
ensure(me);
me->states[me->nstates].state = s;
me->states[me->nstates].movestr = dupstr(me->desc);
me->states[me->nstates].movetype = RESTART;
me->statepos = ++me->nstates;
if (me->ui)
me->ourgame->changed_state(me->ui,
me->states[me->statepos-2].state,
me->states[me->statepos-1].state);
me->anim_time = 0.0;
midend_finish_move(me);
midend_redraw(me);
midend_set_timer(me);
}
static int midend_really_process_key(midend *me, int x, int y, int button)
{
game_state *oldstate =
me->ourgame->dup_game(me->states[me->statepos - 1].state);
int type = MOVE, gottype = FALSE, ret = 1;
float anim_time;
game_state *s;
char *movestr;
movestr =
me->ourgame->interpret_move(me->states[me->statepos-1].state,
me->ui, me->drawstate, x, y, button);
if (!movestr) {
if (button == 'n' || button == 'N' || button == '\x0E') {
midend_stop_anim(me);
midend_new_game(me);
midend_redraw(me);
goto done; /* never animate */
} else if (button == 'u' || button == 'u' ||
button == '\x1A' || button == '\x1F') {
midend_stop_anim(me);
type = me->states[me->statepos-1].movetype;
gottype = TRUE;
if (!midend_undo(me))
goto done;
} else if (button == 'r' || button == 'R' ||
button == '\x12' || button == '\x19') {
midend_stop_anim(me);
if (!midend_redo(me))
goto done;
} else if (button == '\x13' && me->ourgame->can_solve) {
if (midend_solve(me))
goto done;
} else if (button == 'q' || button == 'Q' || button == '\x11') {
ret = 0;
goto done;
} else
goto done;
} else {
if (!*movestr)
s = me->states[me->statepos-1].state;
else {
s = me->ourgame->execute_move(me->states[me->statepos-1].state,
movestr);
assert(s != NULL);
}
if (s == me->states[me->statepos-1].state) {
/*
* make_move() is allowed to return its input state to
* indicate that although no move has been made, the UI
* state has been updated and a redraw is called for.
*/
midend_redraw(me);
midend_set_timer(me);
goto done;
} else if (s) {
midend_stop_anim(me);
midend_purge_states(me);
ensure(me);
assert(movestr != NULL);
me->states[me->nstates].state = s;
me->states[me->nstates].movestr = movestr;
me->states[me->nstates].movetype = MOVE;
me->statepos = ++me->nstates;
me->dir = +1;
if (me->ui)
me->ourgame->changed_state(me->ui,
me->states[me->statepos-2].state,
me->states[me->statepos-1].state);
} else {
goto done;
}
}
if (!gottype)
type = me->states[me->statepos-1].movetype;
/*
* See if this move requires an animation.
*/
if (special(type) && !(type == SOLVE &&
(me->ourgame->flags & SOLVE_ANIMATES))) {
anim_time = 0;
} else {
anim_time = me->ourgame->anim_length(oldstate,
me->states[me->statepos-1].state,
me->dir, me->ui);
}
me->oldstate = oldstate; oldstate = NULL;
if (anim_time > 0) {
me->anim_time = anim_time;
} else {
me->anim_time = 0.0;
midend_finish_move(me);
}
me->anim_pos = 0.0;
midend_redraw(me);
midend_set_timer(me);
done:
if (oldstate) me->ourgame->free_game(oldstate);
return ret;
}
int midend_process_key(midend *me, int x, int y, int button)
{
int ret = 1;
/*
* Harmonise mouse drag and release messages.
*
* Some front ends might accidentally switch from sending, say,
* RIGHT_DRAG messages to sending LEFT_DRAG, half way through a
* drag. (This can happen on the Mac, for example, since
* RIGHT_DRAG is usually done using Command+drag, and if the
* user accidentally releases Command half way through the drag
* then there will be trouble.)
*
* It would be an O(number of front ends) annoyance to fix this
* in the front ends, but an O(number of back ends) annoyance
* to have each game capable of dealing with it. Therefore, we
* fix it _here_ in the common midend code so that it only has
* to be done once.
*
* The possible ways in which things can go screwy in the front
* end are:
*
* - in a system containing multiple physical buttons button
* presses can inadvertently overlap. We can see ABab (caps
* meaning button-down and lowercase meaning button-up) when
* the user had semantically intended AaBb.
*
* - in a system where one button is simulated by means of a
* modifier key and another button, buttons can mutate
* between press and release (possibly during drag). So we
* can see Ab instead of Aa.
*
* Definite requirements are:
*
* - button _presses_ must never be invented or destroyed. If
* the user presses two buttons in succession, the button
* presses must be transferred to the backend unchanged. So
* if we see AaBb , that's fine; if we see ABab (the button
* presses inadvertently overlapped) we must somehow
* `correct' it to AaBb.
*
* - every mouse action must end up looking like a press, zero
* or more drags, then a release. This allows back ends to
* make the _assumption_ that incoming mouse data will be
* sane in this regard, and not worry about the details.
*
* So my policy will be:
*
* - treat any button-up as a button-up for the currently
* pressed button, or ignore it if there is no currently
* pressed button.
*
* - treat any drag as a drag for the currently pressed
* button, or ignore it if there is no currently pressed
* button.
*
* - if we see a button-down while another button is currently
* pressed, invent a button-up for the first one and then
* pass the button-down through as before.
*
* 2005-05-31: An addendum to the above. Some games might want
* a `priority order' among buttons, such that if one button is
* pressed while another is down then a fixed one of the
* buttons takes priority no matter what order they're pressed
* in. Mines, in particular, wants to treat a left+right click
* like a left click for the benefit of users of other
* implementations. So the last of the above points is modified
* in the presence of an (optional) button priority order.
*
* A further addition: we translate certain keyboard presses to
* cursor key 'select' buttons, so that a) frontends don't have
* to translate these themselves (like they do for CURSOR_UP etc),
* and b) individual games don't have to hard-code button presses
* of '\n' etc for keyboard-based cursors. The choice of buttons
* here could eventually be controlled by a runtime configuration
* option.
*/
if (IS_MOUSE_DRAG(button) || IS_MOUSE_RELEASE(button)) {
if (me->pressed_mouse_button) {
if (IS_MOUSE_DRAG(button)) {
button = me->pressed_mouse_button +
(LEFT_DRAG - LEFT_BUTTON);
} else {
button = me->pressed_mouse_button +
(LEFT_RELEASE - LEFT_BUTTON);
}
} else
return ret; /* ignore it */
} else if (IS_MOUSE_DOWN(button) && me->pressed_mouse_button) {
/*
* If the new button has lower priority than the old one,
* don't bother doing this.
*/
if (me->ourgame->flags &
BUTTON_BEATS(me->pressed_mouse_button, button))
return ret; /* just ignore it */
/*
* Fabricate a button-up for the previously pressed button.
*/
ret = ret && midend_really_process_key
(me, x, y, (me->pressed_mouse_button +
(LEFT_RELEASE - LEFT_BUTTON)));
}
/*
* Translate keyboard presses to cursor selection.
*/
if (button == '\n' || button == '\r')
button = CURSOR_SELECT;
if (button == ' ')
button = CURSOR_SELECT2;
/*
* Normalise both backspace characters (8 and 127) to \b. Easier
* to do this once, here, than to require all front ends to
* carefully generate the same one - now each front end can
* generate whichever is easiest.
*/
if (button == '\177')
button = '\b';
/*
* Now send on the event we originally received.
*/
ret = ret && midend_really_process_key(me, x, y, button);
/*
* And update the currently pressed button.
*/
if (IS_MOUSE_RELEASE(button))
me->pressed_mouse_button = 0;
else if (IS_MOUSE_DOWN(button))
me->pressed_mouse_button = button;
return ret;
}
void midend_redraw(midend *me)
{
assert(me->drawing);
if (me->statepos > 0 && me->drawstate) {
start_draw(me->drawing);
if (me->oldstate && me->anim_time > 0 &&
me->anim_pos < me->anim_time) {
assert(me->dir != 0);
me->ourgame->redraw(me->drawing, me->drawstate, me->oldstate,
me->states[me->statepos-1].state, me->dir,
me->ui, me->anim_pos, me->flash_pos);
} else {
me->ourgame->redraw(me->drawing, me->drawstate, NULL,
me->states[me->statepos-1].state, +1 /*shrug*/,
me->ui, 0.0, me->flash_pos);
}
end_draw(me->drawing);
}
}
/*
* Nasty hacky function used to implement the --redo option in
* gtk.c. Only used for generating the puzzles' icons.
*/
void midend_freeze_timer(midend *me, float tprop)
{
me->anim_pos = me->anim_time * tprop;
midend_redraw(me);
deactivate_timer(me->frontend);
}
void midend_timer(midend *me, float tplus)
{
int need_redraw = (me->anim_time > 0 || me->flash_time > 0);
me->anim_pos += tplus;
if (me->anim_pos >= me->anim_time ||
me->anim_time == 0 || !me->oldstate) {
if (me->anim_time > 0)
midend_finish_move(me);
}
me->flash_pos += tplus;
if (me->flash_pos >= me->flash_time || me->flash_time == 0) {
me->flash_pos = me->flash_time = 0;
}
if (need_redraw)
midend_redraw(me);
if (me->timing) {
float oldelapsed = me->elapsed;
me->elapsed += tplus;
if ((int)oldelapsed != (int)me->elapsed)
status_bar(me->drawing, me->laststatus ? me->laststatus : "");
}
midend_set_timer(me);
}
float *midend_colours(midend *me, int *ncolours)
{
float *ret;
ret = me->ourgame->colours(me->frontend, ncolours);
{
int i;
/*
* Allow environment-based overrides for the standard
* colours by defining variables along the lines of
* `NET_COLOUR_4=6000c0'.
*/
for (i = 0; i < *ncolours; i++) {
char buf[80], *e;
unsigned int r, g, b;
int j, k;
sprintf(buf, "%s_COLOUR_%d", me->ourgame->name, i);
for (j = k = 0; buf[j]; j++)
if (!isspace((unsigned char)buf[j]))
buf[k++] = toupper((unsigned char)buf[j]);
buf[k] = '\0';
if ((e = getenv(buf)) != NULL &&
sscanf(e, "%2x%2x%2x", &r, &g, &b) == 3) {
ret[i*3 + 0] = r / 255.0F;
ret[i*3 + 1] = g / 255.0F;
ret[i*3 + 2] = b / 255.0F;
}
}
}
return ret;
}
int midend_num_presets(midend *me)
{
if (!me->npresets) {
char *name;
game_params *preset;
while (me->ourgame->fetch_preset(me->npresets, &name, &preset)) {
if (me->presetsize <= me->npresets) {
me->presetsize = me->npresets + 10;
me->presets = sresize(me->presets, me->presetsize,
game_params *);
me->preset_names = sresize(me->preset_names, me->presetsize,
char *);
me->preset_encodings = sresize(me->preset_encodings,
me->presetsize, char *);
}
me->presets[me->npresets] = preset;
me->preset_names[me->npresets] = name;
me->preset_encodings[me->npresets] =
me->ourgame->encode_params(preset, TRUE);;
me->npresets++;
}
}
{
/*
* Allow environment-based extensions to the preset list by
* defining a variable along the lines of `SOLO_PRESETS=2x3
* Advanced:2x3da'. Colon-separated list of items,
* alternating between textual titles in the menu and
* encoded parameter strings.
*/
char buf[80], *e, *p;
int j, k;
sprintf(buf, "%s_PRESETS", me->ourgame->name);
for (j = k = 0; buf[j]; j++)
if (!isspace((unsigned char)buf[j]))
buf[k++] = toupper((unsigned char)buf[j]);
buf[k] = '\0';
if ((e = getenv(buf)) != NULL) {
p = e = dupstr(e);
while (*p) {
char *name, *val;
game_params *preset;
name = p;
while (*p && *p != ':') p++;
if (*p) *p++ = '\0';
val = p;
while (*p && *p != ':') p++;
if (*p) *p++ = '\0';
preset = me->ourgame->default_params();
me->ourgame->decode_params(preset, val);
if (me->ourgame->validate_params(preset, TRUE)) {
/* Drop this one from the list. */
me->ourgame->free_params(preset);
continue;
}
if (me->presetsize <= me->npresets) {
me->presetsize = me->npresets + 10;
me->presets = sresize(me->presets, me->presetsize,
game_params *);
me->preset_names = sresize(me->preset_names,
me->presetsize, char *);