720a8fb7 |
1 | /* |
2 | * midend.c: general middle fragment sitting between the |
3 | * platform-specific front end and game-specific back end. |
4 | * Maintains a move list, takes care of Undo and Redo commands, and |
7f89707c |
5 | * processes standard keystrokes for undo/redo/new/quit. |
720a8fb7 |
6 | */ |
7f77ea24 |
7 | |
8 | #include <stdio.h> |
5928817c |
9 | #include <string.h> |
7f77ea24 |
10 | #include <assert.h> |
813593cc |
11 | #include <stdlib.h> |
12 | #include <ctype.h> |
7f77ea24 |
13 | |
14 | #include "puzzles.h" |
15 | |
1185e3c5 |
16 | enum { DEF_PARAMS, DEF_SEED, DEF_DESC }; /* for midend_game_id_int */ |
17 | |
28d0118c |
18 | struct midend_state_entry { |
19 | game_state *state; |
20 | int special; /* created by solve or restart */ |
21 | }; |
22 | |
7f77ea24 |
23 | struct midend_data { |
2ef96bd6 |
24 | frontend *frontend; |
48d70ca9 |
25 | random_state *random; |
be8d5aa1 |
26 | const game *ourgame; |
48d70ca9 |
27 | |
1185e3c5 |
28 | char *desc, *seedstr; |
6f2d8d7c |
29 | game_aux_info *aux_info; |
1185e3c5 |
30 | enum { GOT_SEED, GOT_DESC, GOT_NOTHING } genmode; |
7f77ea24 |
31 | int nstates, statesize, statepos; |
eb2ad6f1 |
32 | |
33 | game_params **presets; |
34 | char **preset_names; |
35 | int npresets, presetsize; |
36 | |
f60f7e7c |
37 | game_params *params, *curparams; |
28d0118c |
38 | struct midend_state_entry *states; |
2ef96bd6 |
39 | game_drawstate *drawstate; |
40 | game_state *oldstate; |
74a4e547 |
41 | game_ui *ui; |
2ef96bd6 |
42 | float anim_time, anim_pos; |
87ed82be |
43 | float flash_time, flash_pos; |
c822de4a |
44 | int dir; |
6776a950 |
45 | |
46 | int pressed_mouse_button; |
7f77ea24 |
47 | }; |
48 | |
49 | #define ensure(me) do { \ |
50 | if ((me)->nstates >= (me)->statesize) { \ |
51 | (me)->statesize = (me)->nstates + 128; \ |
28d0118c |
52 | (me)->states = sresize((me)->states, (me)->statesize, \ |
53 | struct midend_state_entry); \ |
7f77ea24 |
54 | } \ |
55 | } while (0) |
56 | |
be8d5aa1 |
57 | midend_data *midend_new(frontend *fe, const game *ourgame) |
7f77ea24 |
58 | { |
59 | midend_data *me = snew(midend_data); |
cbb5549e |
60 | void *randseed; |
61 | int randseedsize; |
62 | |
63 | get_random_seed(&randseed, &randseedsize); |
7f77ea24 |
64 | |
48d70ca9 |
65 | me->frontend = fe; |
be8d5aa1 |
66 | me->ourgame = ourgame; |
48d70ca9 |
67 | me->random = random_init(randseed, randseedsize); |
7f77ea24 |
68 | me->nstates = me->statesize = me->statepos = 0; |
69 | me->states = NULL; |
be8d5aa1 |
70 | me->params = ourgame->default_params(); |
f60f7e7c |
71 | me->curparams = NULL; |
1185e3c5 |
72 | me->desc = NULL; |
73 | me->seedstr = NULL; |
6f2d8d7c |
74 | me->aux_info = NULL; |
1185e3c5 |
75 | me->genmode = GOT_NOTHING; |
2ef96bd6 |
76 | me->drawstate = NULL; |
77 | me->oldstate = NULL; |
eb2ad6f1 |
78 | me->presets = NULL; |
79 | me->preset_names = NULL; |
80 | me->npresets = me->presetsize = 0; |
87ed82be |
81 | me->anim_time = me->anim_pos = 0.0F; |
82 | me->flash_time = me->flash_pos = 0.0F; |
c822de4a |
83 | me->dir = 0; |
74a4e547 |
84 | me->ui = NULL; |
6776a950 |
85 | me->pressed_mouse_button = 0; |
7f77ea24 |
86 | |
cbb5549e |
87 | sfree(randseed); |
88 | |
7f77ea24 |
89 | return me; |
90 | } |
91 | |
92 | void midend_free(midend_data *me) |
93 | { |
94 | sfree(me->states); |
1185e3c5 |
95 | sfree(me->desc); |
96 | sfree(me->seedstr); |
97 | random_free(me->random); |
6f2d8d7c |
98 | if (me->aux_info) |
99 | me->ourgame->free_aux_info(me->aux_info); |
be8d5aa1 |
100 | me->ourgame->free_params(me->params); |
f60f7e7c |
101 | if (me->curparams) |
102 | me->ourgame->free_params(me->curparams); |
7f77ea24 |
103 | sfree(me); |
104 | } |
105 | |
106 | void midend_size(midend_data *me, int *x, int *y) |
107 | { |
be8d5aa1 |
108 | me->ourgame->size(me->params, x, y); |
7f77ea24 |
109 | } |
110 | |
111 | void midend_set_params(midend_data *me, game_params *params) |
112 | { |
be8d5aa1 |
113 | me->ourgame->free_params(me->params); |
114 | me->params = me->ourgame->dup_params(params); |
7f77ea24 |
115 | } |
116 | |
5928817c |
117 | void midend_new_game(midend_data *me) |
7f77ea24 |
118 | { |
119 | while (me->nstates > 0) |
28d0118c |
120 | me->ourgame->free_game(me->states[--me->nstates].state); |
7f77ea24 |
121 | |
2ef96bd6 |
122 | if (me->drawstate) |
be8d5aa1 |
123 | me->ourgame->free_drawstate(me->drawstate); |
2ef96bd6 |
124 | |
7f77ea24 |
125 | assert(me->nstates == 0); |
126 | |
1185e3c5 |
127 | if (me->genmode == GOT_DESC) { |
128 | me->genmode = GOT_NOTHING; |
129 | } else { |
130 | random_state *rs; |
131 | |
132 | if (me->genmode == GOT_SEED) { |
133 | me->genmode = GOT_NOTHING; |
134 | } else { |
135 | /* |
136 | * Generate a new random seed. 15 digits comes to about |
137 | * 48 bits, which should be more than enough. |
97c44af3 |
138 | * |
139 | * I'll avoid putting a leading zero on the number, |
140 | * just in case it confuses anybody who thinks it's |
141 | * processed as an integer rather than a string. |
1185e3c5 |
142 | */ |
143 | char newseed[16]; |
144 | int i; |
145 | newseed[15] = '\0'; |
97c44af3 |
146 | newseed[0] = '1' + random_upto(me->random, 9); |
147 | for (i = 1; i < 15; i++) |
1185e3c5 |
148 | newseed[i] = '0' + random_upto(me->random, 10); |
149 | sfree(me->seedstr); |
150 | me->seedstr = dupstr(newseed); |
f60f7e7c |
151 | |
152 | if (me->curparams) |
153 | me->ourgame->free_params(me->curparams); |
154 | me->curparams = me->ourgame->dup_params(me->params); |
1185e3c5 |
155 | } |
156 | |
157 | sfree(me->desc); |
6f2d8d7c |
158 | if (me->aux_info) |
159 | me->ourgame->free_aux_info(me->aux_info); |
160 | me->aux_info = NULL; |
1185e3c5 |
161 | |
162 | rs = random_init(me->seedstr, strlen(me->seedstr)); |
f60f7e7c |
163 | me->desc = me->ourgame->new_desc(me->curparams, rs, &me->aux_info); |
1185e3c5 |
164 | random_free(rs); |
1185e3c5 |
165 | } |
7f77ea24 |
166 | |
167 | ensure(me); |
28d0118c |
168 | me->states[me->nstates].state = me->ourgame->new_game(me->params, me->desc); |
169 | me->states[me->nstates].special = TRUE; |
170 | me->nstates++; |
7f77ea24 |
171 | me->statepos = 1; |
28d0118c |
172 | me->drawstate = me->ourgame->new_drawstate(me->states[0].state); |
74a4e547 |
173 | if (me->ui) |
be8d5aa1 |
174 | me->ourgame->free_ui(me->ui); |
28d0118c |
175 | me->ui = me->ourgame->new_ui(me->states[0].state); |
6776a950 |
176 | me->pressed_mouse_button = 0; |
7f77ea24 |
177 | } |
178 | |
1482ee76 |
179 | static int midend_undo(midend_data *me) |
7f77ea24 |
180 | { |
1482ee76 |
181 | if (me->statepos > 1) { |
7f77ea24 |
182 | me->statepos--; |
c822de4a |
183 | me->dir = -1; |
1482ee76 |
184 | return 1; |
185 | } else |
186 | return 0; |
7f77ea24 |
187 | } |
188 | |
1482ee76 |
189 | static int midend_redo(midend_data *me) |
7f77ea24 |
190 | { |
1482ee76 |
191 | if (me->statepos < me->nstates) { |
7f77ea24 |
192 | me->statepos++; |
c822de4a |
193 | me->dir = +1; |
1482ee76 |
194 | return 1; |
195 | } else |
196 | return 0; |
7f77ea24 |
197 | } |
198 | |
87ed82be |
199 | static void midend_finish_move(midend_data *me) |
200 | { |
201 | float flashtime; |
202 | |
28d0118c |
203 | /* |
204 | * We do not flash if the later of the two states is special. |
205 | * This covers both forward Solve moves and backward (undone) |
206 | * Restart moves. |
207 | */ |
208 | if ((me->oldstate || me->statepos > 1) && |
209 | ((me->dir > 0 && !me->states[me->statepos-1].special) || |
210 | (me->dir < 0 && me->statepos < me->nstates && |
211 | !me->states[me->statepos].special))) { |
be8d5aa1 |
212 | flashtime = me->ourgame->flash_length(me->oldstate ? me->oldstate : |
28d0118c |
213 | me->states[me->statepos-2].state, |
214 | me->states[me->statepos-1].state, |
e3f21163 |
215 | me->oldstate ? me->dir : +1, |
216 | me->ui); |
87ed82be |
217 | if (flashtime > 0) { |
218 | me->flash_pos = 0.0F; |
219 | me->flash_time = flashtime; |
220 | } |
221 | } |
222 | |
223 | if (me->oldstate) |
be8d5aa1 |
224 | me->ourgame->free_game(me->oldstate); |
87ed82be |
225 | me->oldstate = NULL; |
226 | me->anim_pos = me->anim_time = 0; |
c822de4a |
227 | me->dir = 0; |
87ed82be |
228 | |
229 | if (me->flash_time == 0 && me->anim_time == 0) |
230 | deactivate_timer(me->frontend); |
231 | else |
232 | activate_timer(me->frontend); |
233 | } |
234 | |
dd216087 |
235 | static void midend_stop_anim(midend_data *me) |
7f77ea24 |
236 | { |
2ef96bd6 |
237 | if (me->oldstate || me->anim_time) { |
87ed82be |
238 | midend_finish_move(me); |
2ef96bd6 |
239 | midend_redraw(me); |
240 | } |
dd216087 |
241 | } |
242 | |
28d0118c |
243 | void midend_restart_game(midend_data *me) |
244 | { |
245 | game_state *s; |
246 | |
7f89707c |
247 | midend_stop_anim(me); |
248 | |
28d0118c |
249 | assert(me->statepos >= 1); |
250 | if (me->statepos == 1) |
251 | return; /* no point doing anything at all! */ |
252 | |
253 | s = me->ourgame->dup_game(me->states[0].state); |
254 | |
255 | /* |
256 | * Now enter the restarted state as the next move. |
257 | */ |
258 | midend_stop_anim(me); |
259 | while (me->nstates > me->statepos) |
260 | me->ourgame->free_game(me->states[--me->nstates].state); |
261 | ensure(me); |
262 | me->states[me->nstates].state = s; |
263 | me->states[me->nstates].special = TRUE; /* we just restarted */ |
264 | me->statepos = ++me->nstates; |
265 | me->anim_time = 0.0; |
266 | midend_finish_move(me); |
267 | midend_redraw(me); |
268 | activate_timer(me->frontend); |
269 | } |
270 | |
6776a950 |
271 | static int midend_really_process_key(midend_data *me, int x, int y, int button) |
dd216087 |
272 | { |
28d0118c |
273 | game_state *oldstate = |
274 | me->ourgame->dup_game(me->states[me->statepos - 1].state); |
275 | int special = FALSE, gotspecial = FALSE; |
dd216087 |
276 | float anim_time; |
7f77ea24 |
277 | |
278 | if (button == 'n' || button == 'N' || button == '\x0E') { |
dd216087 |
279 | midend_stop_anim(me); |
5928817c |
280 | midend_new_game(me); |
2ef96bd6 |
281 | midend_redraw(me); |
282 | return 1; /* never animate */ |
7f77ea24 |
283 | } else if (button == 'u' || button == 'u' || |
1482ee76 |
284 | button == '\x1A' || button == '\x1F') { |
dd216087 |
285 | midend_stop_anim(me); |
28d0118c |
286 | special = me->states[me->statepos-1].special; |
287 | gotspecial = TRUE; |
1482ee76 |
288 | if (!midend_undo(me)) |
289 | return 1; |
7f89707c |
290 | } else if (button == 'r' || button == 'R' || |
291 | button == '\x12') { |
dd216087 |
292 | midend_stop_anim(me); |
1482ee76 |
293 | if (!midend_redo(me)) |
294 | return 1; |
7f77ea24 |
295 | } else if (button == 'q' || button == 'Q' || button == '\x11') { |
be8d5aa1 |
296 | me->ourgame->free_game(oldstate); |
2ef96bd6 |
297 | return 0; |
298 | } else { |
28d0118c |
299 | game_state *s = |
300 | me->ourgame->make_move(me->states[me->statepos-1].state, |
301 | me->ui, x, y, button); |
74a4e547 |
302 | |
28d0118c |
303 | if (s == me->states[me->statepos-1].state) { |
74a4e547 |
304 | /* |
305 | * make_move() is allowed to return its input state to |
306 | * indicate that although no move has been made, the UI |
307 | * state has been updated and a redraw is called for. |
308 | */ |
309 | midend_redraw(me); |
310 | return 1; |
311 | } else if (s) { |
dd216087 |
312 | midend_stop_anim(me); |
2ef96bd6 |
313 | while (me->nstates > me->statepos) |
28d0118c |
314 | me->ourgame->free_game(me->states[--me->nstates].state); |
2ef96bd6 |
315 | ensure(me); |
28d0118c |
316 | me->states[me->nstates].state = s; |
317 | me->states[me->nstates].special = FALSE; /* normal move */ |
2ef96bd6 |
318 | me->statepos = ++me->nstates; |
c822de4a |
319 | me->dir = +1; |
2ef96bd6 |
320 | } else { |
be8d5aa1 |
321 | me->ourgame->free_game(oldstate); |
2ef96bd6 |
322 | return 1; |
323 | } |
7f77ea24 |
324 | } |
325 | |
28d0118c |
326 | if (!gotspecial) |
327 | special = me->states[me->statepos-1].special; |
328 | |
2ef96bd6 |
329 | /* |
330 | * See if this move requires an animation. |
331 | */ |
28d0118c |
332 | if (special) { |
333 | anim_time = 0; |
334 | } else { |
335 | anim_time = me->ourgame->anim_length(oldstate, |
336 | me->states[me->statepos-1].state, |
e3f21163 |
337 | me->dir, me->ui); |
28d0118c |
338 | } |
2ef96bd6 |
339 | |
87ed82be |
340 | me->oldstate = oldstate; |
2ef96bd6 |
341 | if (anim_time > 0) { |
2ef96bd6 |
342 | me->anim_time = anim_time; |
343 | } else { |
2ef96bd6 |
344 | me->anim_time = 0.0; |
87ed82be |
345 | midend_finish_move(me); |
7f77ea24 |
346 | } |
2ef96bd6 |
347 | me->anim_pos = 0.0; |
348 | |
349 | midend_redraw(me); |
350 | |
351 | activate_timer(me->frontend); |
7f77ea24 |
352 | |
353 | return 1; |
354 | } |
2ef96bd6 |
355 | |
6776a950 |
356 | int midend_process_key(midend_data *me, int x, int y, int button) |
357 | { |
358 | int ret = 1; |
359 | |
360 | /* |
361 | * Harmonise mouse drag and release messages. |
362 | * |
363 | * Some front ends might accidentally switch from sending, say, |
364 | * RIGHT_DRAG messages to sending LEFT_DRAG, half way through a |
365 | * drag. (This can happen on the Mac, for example, since |
366 | * RIGHT_DRAG is usually done using Command+drag, and if the |
367 | * user accidentally releases Command half way through the drag |
368 | * then there will be trouble.) |
369 | * |
370 | * It would be an O(number of front ends) annoyance to fix this |
371 | * in the front ends, but an O(number of back ends) annoyance |
372 | * to have each game capable of dealing with it. Therefore, we |
373 | * fix it _here_ in the common midend code so that it only has |
374 | * to be done once. |
375 | * |
eeba2afe |
376 | * The possible ways in which things can go screwy in the front |
377 | * end are: |
6776a950 |
378 | * |
eeba2afe |
379 | * - in a system containing multiple physical buttons button |
380 | * presses can inadvertently overlap. We can see ABab (caps |
381 | * meaning button-down and lowercase meaning button-up) when |
382 | * the user had semantically intended AaBb. |
6776a950 |
383 | * |
eeba2afe |
384 | * - in a system where one button is simulated by means of a |
385 | * modifier key and another button, buttons can mutate |
386 | * between press and release (possibly during drag). So we |
387 | * can see Ab instead of Aa. |
6776a950 |
388 | * |
eeba2afe |
389 | * Definite requirements are: |
390 | * |
391 | * - button _presses_ must never be invented or destroyed. If |
392 | * the user presses two buttons in succession, the button |
393 | * presses must be transferred to the backend unchanged. So |
394 | * if we see AaBb , that's fine; if we see ABab (the button |
395 | * presses inadvertently overlapped) we must somehow |
396 | * `correct' it to AaBb. |
397 | * |
398 | * - every mouse action must end up looking like a press, zero |
399 | * or more drags, then a release. This allows back ends to |
400 | * make the _assumption_ that incoming mouse data will be |
401 | * sane in this regard, and not worry about the details. |
402 | * |
403 | * So my policy will be: |
404 | * |
405 | * - treat any button-up as a button-up for the currently |
406 | * pressed button, or ignore it if there is no currently |
407 | * pressed button. |
408 | * |
409 | * - treat any drag as a drag for the currently pressed |
410 | * button, or ignore it if there is no currently pressed |
411 | * button. |
412 | * |
413 | * - if we see a button-down while another button is currently |
414 | * pressed, invent a button-up for the first one and then |
415 | * pass the button-down through as before. |
6776a950 |
416 | * |
6776a950 |
417 | */ |
418 | if (IS_MOUSE_DRAG(button) || IS_MOUSE_RELEASE(button)) { |
eeba2afe |
419 | if (me->pressed_mouse_button) { |
420 | if (IS_MOUSE_DRAG(button)) { |
421 | button = me->pressed_mouse_button + |
422 | (LEFT_DRAG - LEFT_BUTTON); |
423 | } else { |
424 | button = me->pressed_mouse_button + |
425 | (LEFT_RELEASE - LEFT_BUTTON); |
6776a950 |
426 | } |
eeba2afe |
427 | } else |
428 | return ret; /* ignore it */ |
6776a950 |
429 | } else if (IS_MOUSE_DOWN(button) && me->pressed_mouse_button) { |
430 | /* |
431 | * Fabricate a button-up for the previously pressed button. |
432 | */ |
433 | ret = ret && midend_really_process_key |
434 | (me, x, y, (me->pressed_mouse_button + |
435 | (LEFT_RELEASE - LEFT_BUTTON))); |
436 | } |
437 | |
438 | /* |
439 | * Now send on the event we originally received. |
440 | */ |
441 | ret = ret && midend_really_process_key(me, x, y, button); |
442 | |
443 | /* |
444 | * And update the currently pressed button. |
445 | */ |
446 | if (IS_MOUSE_RELEASE(button)) |
447 | me->pressed_mouse_button = 0; |
448 | else if (IS_MOUSE_DOWN(button)) |
449 | me->pressed_mouse_button = button; |
450 | |
451 | return ret; |
452 | } |
453 | |
2ef96bd6 |
454 | void midend_redraw(midend_data *me) |
455 | { |
456 | if (me->statepos > 0 && me->drawstate) { |
457 | start_draw(me->frontend); |
458 | if (me->oldstate && me->anim_time > 0 && |
459 | me->anim_pos < me->anim_time) { |
c822de4a |
460 | assert(me->dir != 0); |
be8d5aa1 |
461 | me->ourgame->redraw(me->frontend, me->drawstate, me->oldstate, |
28d0118c |
462 | me->states[me->statepos-1].state, me->dir, |
be8d5aa1 |
463 | me->ui, me->anim_pos, me->flash_pos); |
2ef96bd6 |
464 | } else { |
be8d5aa1 |
465 | me->ourgame->redraw(me->frontend, me->drawstate, NULL, |
28d0118c |
466 | me->states[me->statepos-1].state, +1 /*shrug*/, |
be8d5aa1 |
467 | me->ui, 0.0, me->flash_pos); |
2ef96bd6 |
468 | } |
469 | end_draw(me->frontend); |
470 | } |
471 | } |
472 | |
473 | void midend_timer(midend_data *me, float tplus) |
474 | { |
475 | me->anim_pos += tplus; |
476 | if (me->anim_pos >= me->anim_time || |
477 | me->anim_time == 0 || !me->oldstate) { |
87ed82be |
478 | if (me->anim_time > 0) |
479 | midend_finish_move(me); |
480 | } |
481 | me->flash_pos += tplus; |
482 | if (me->flash_pos >= me->flash_time || me->flash_time == 0) { |
483 | me->flash_pos = me->flash_time = 0; |
2ef96bd6 |
484 | } |
87ed82be |
485 | if (me->flash_time == 0 && me->anim_time == 0) |
486 | deactivate_timer(me->frontend); |
2ef96bd6 |
487 | midend_redraw(me); |
488 | } |
489 | |
490 | float *midend_colours(midend_data *me, int *ncolours) |
491 | { |
492 | game_state *state = NULL; |
493 | float *ret; |
494 | |
495 | if (me->nstates == 0) { |
6f2d8d7c |
496 | game_aux_info *aux = NULL; |
1185e3c5 |
497 | char *desc = me->ourgame->new_desc(me->params, me->random, &aux); |
498 | state = me->ourgame->new_game(me->params, desc); |
499 | sfree(desc); |
6f2d8d7c |
500 | if (aux) |
501 | me->ourgame->free_aux_info(aux); |
2ef96bd6 |
502 | } else |
28d0118c |
503 | state = me->states[0].state; |
2ef96bd6 |
504 | |
be8d5aa1 |
505 | ret = me->ourgame->colours(me->frontend, state, ncolours); |
2ef96bd6 |
506 | |
813593cc |
507 | { |
508 | int i; |
509 | |
510 | /* |
511 | * Allow environment-based overrides for the standard |
512 | * colours by defining variables along the lines of |
513 | * `NET_COLOUR_4=6000c0'. |
514 | */ |
515 | |
516 | for (i = 0; i < *ncolours; i++) { |
517 | char buf[80], *e; |
518 | unsigned int r, g, b; |
519 | int j; |
520 | |
521 | sprintf(buf, "%s_COLOUR_%d", me->ourgame->name, i); |
522 | for (j = 0; buf[j]; j++) |
523 | buf[j] = toupper((unsigned char)buf[j]); |
524 | if ((e = getenv(buf)) != NULL && |
525 | sscanf(e, "%2x%2x%2x", &r, &g, &b) == 3) { |
526 | ret[i*3 + 0] = r / 255.0; |
527 | ret[i*3 + 1] = g / 255.0; |
528 | ret[i*3 + 2] = b / 255.0; |
529 | } |
530 | } |
531 | } |
532 | |
2ef96bd6 |
533 | if (me->nstates == 0) |
be8d5aa1 |
534 | me->ourgame->free_game(state); |
2ef96bd6 |
535 | |
536 | return ret; |
537 | } |
eb2ad6f1 |
538 | |
539 | int midend_num_presets(midend_data *me) |
540 | { |
541 | if (!me->npresets) { |
542 | char *name; |
543 | game_params *preset; |
544 | |
be8d5aa1 |
545 | while (me->ourgame->fetch_preset(me->npresets, &name, &preset)) { |
eb2ad6f1 |
546 | if (me->presetsize <= me->npresets) { |
547 | me->presetsize = me->npresets + 10; |
548 | me->presets = sresize(me->presets, me->presetsize, |
549 | game_params *); |
550 | me->preset_names = sresize(me->preset_names, me->presetsize, |
551 | char *); |
552 | } |
553 | |
554 | me->presets[me->npresets] = preset; |
555 | me->preset_names[me->npresets] = name; |
556 | me->npresets++; |
557 | } |
558 | } |
559 | |
813593cc |
560 | { |
561 | /* |
562 | * Allow environment-based extensions to the preset list by |
563 | * defining a variable along the lines of `SOLO_PRESETS=2x3 |
564 | * Advanced:2x3da'. Colon-separated list of items, |
565 | * alternating between textual titles in the menu and |
566 | * encoded parameter strings. |
567 | */ |
568 | char buf[80], *e, *p; |
569 | int j; |
570 | |
571 | sprintf(buf, "%s_PRESETS", me->ourgame->name); |
572 | for (j = 0; buf[j]; j++) |
573 | buf[j] = toupper((unsigned char)buf[j]); |
574 | |
575 | if ((e = getenv(buf)) != NULL) { |
576 | p = e = dupstr(e); |
577 | |
578 | while (*p) { |
579 | char *name, *val; |
580 | game_params *preset; |
581 | |
582 | name = p; |
583 | while (*p && *p != ':') p++; |
584 | if (*p) *p++ = '\0'; |
585 | val = p; |
586 | while (*p && *p != ':') p++; |
587 | if (*p) *p++ = '\0'; |
588 | |
589 | preset = me->ourgame->default_params(); |
590 | me->ourgame->decode_params(preset, val); |
591 | |
239ba6e6 |
592 | if (me->ourgame->validate_params(preset)) { |
593 | /* Drop this one from the list. */ |
594 | me->ourgame->free_params(preset); |
595 | continue; |
596 | } |
597 | |
813593cc |
598 | if (me->presetsize <= me->npresets) { |
599 | me->presetsize = me->npresets + 10; |
600 | me->presets = sresize(me->presets, me->presetsize, |
601 | game_params *); |
602 | me->preset_names = sresize(me->preset_names, |
603 | me->presetsize, char *); |
604 | } |
605 | |
606 | me->presets[me->npresets] = preset; |
607 | me->preset_names[me->npresets] = name; |
608 | me->npresets++; |
609 | } |
610 | } |
611 | } |
612 | |
eb2ad6f1 |
613 | return me->npresets; |
614 | } |
615 | |
616 | void midend_fetch_preset(midend_data *me, int n, |
617 | char **name, game_params **params) |
618 | { |
619 | assert(n >= 0 && n < me->npresets); |
620 | *name = me->preset_names[n]; |
621 | *params = me->presets[n]; |
622 | } |
fd1a1a2b |
623 | |
624 | int midend_wants_statusbar(midend_data *me) |
625 | { |
be8d5aa1 |
626 | return me->ourgame->wants_statusbar(); |
fd1a1a2b |
627 | } |
c8230524 |
628 | |
5928817c |
629 | config_item *midend_get_config(midend_data *me, int which, char **wintitle) |
c8230524 |
630 | { |
b0e26073 |
631 | char *titlebuf, *parstr; |
5928817c |
632 | config_item *ret; |
633 | |
be8d5aa1 |
634 | titlebuf = snewn(40 + strlen(me->ourgame->name), char); |
5928817c |
635 | |
636 | switch (which) { |
637 | case CFG_SETTINGS: |
be8d5aa1 |
638 | sprintf(titlebuf, "%s configuration", me->ourgame->name); |
5928817c |
639 | *wintitle = dupstr(titlebuf); |
be8d5aa1 |
640 | return me->ourgame->configure(me->params); |
5928817c |
641 | case CFG_SEED: |
1185e3c5 |
642 | case CFG_DESC: |
643 | sprintf(titlebuf, "%s %s selection", me->ourgame->name, |
644 | which == CFG_SEED ? "random" : "game"); |
5928817c |
645 | *wintitle = dupstr(titlebuf); |
646 | |
647 | ret = snewn(2, config_item); |
648 | |
649 | ret[0].type = C_STRING; |
1185e3c5 |
650 | if (which == CFG_SEED) |
651 | ret[0].name = "Game random seed"; |
652 | else |
653 | ret[0].name = "Game ID"; |
5928817c |
654 | ret[0].ival = 0; |
b0e26073 |
655 | /* |
1185e3c5 |
656 | * For CFG_DESC the text going in here will be a string |
657 | * encoding of the restricted parameters, plus a colon, |
658 | * plus the game description. For CFG_SEED it will be the |
659 | * full parameters, plus a hash, plus the random seed data. |
660 | * Either of these is a valid full game ID (although only |
661 | * the former is likely to persist across many code |
662 | * changes). |
b0e26073 |
663 | */ |
f60f7e7c |
664 | parstr = me->ourgame->encode_params(me->curparams, which == CFG_SEED); |
1185e3c5 |
665 | if (which == CFG_DESC) { |
666 | ret[0].sval = snewn(strlen(parstr) + strlen(me->desc) + 2, char); |
667 | sprintf(ret[0].sval, "%s:%s", parstr, me->desc); |
668 | } else if (me->seedstr) { |
669 | ret[0].sval = snewn(strlen(parstr) + strlen(me->seedstr) + 2, char); |
670 | sprintf(ret[0].sval, "%s#%s", parstr, me->seedstr); |
671 | } else { |
672 | /* |
673 | * If the current game was not randomly generated, the |
674 | * best we can do is to give a template for typing a |
675 | * new seed in. |
676 | */ |
677 | ret[0].sval = snewn(strlen(parstr) + 2, char); |
678 | sprintf(ret[0].sval, "%s#", parstr); |
679 | } |
b0e26073 |
680 | sfree(parstr); |
5928817c |
681 | |
682 | ret[1].type = C_END; |
683 | ret[1].name = ret[1].sval = NULL; |
684 | ret[1].ival = 0; |
685 | |
686 | return ret; |
687 | } |
688 | |
689 | assert(!"We shouldn't be here"); |
690 | return NULL; |
c8230524 |
691 | } |
692 | |
1185e3c5 |
693 | static char *midend_game_id_int(midend_data *me, char *id, int defmode) |
8b7938e7 |
694 | { |
1185e3c5 |
695 | char *error, *par, *desc, *seed; |
8b7938e7 |
696 | |
1185e3c5 |
697 | seed = strchr(id, '#'); |
698 | desc = strchr(id, ':'); |
8b7938e7 |
699 | |
1185e3c5 |
700 | if (desc && (!seed || desc < seed)) { |
701 | /* |
702 | * We have a colon separating parameters from game |
703 | * description. So `par' now points to the parameters |
704 | * string, and `desc' to the description string. |
705 | */ |
706 | *desc++ = '\0'; |
707 | par = id; |
708 | seed = NULL; |
709 | } else if (seed && (!desc || seed < desc)) { |
8b7938e7 |
710 | /* |
50ff5730 |
711 | * We have a hash separating parameters from random seed. |
1185e3c5 |
712 | * So `par' now points to the parameters string, and `seed' |
713 | * to the seed string. |
8b7938e7 |
714 | */ |
715 | *seed++ = '\0'; |
716 | par = id; |
1185e3c5 |
717 | desc = NULL; |
8b7938e7 |
718 | } else { |
719 | /* |
1185e3c5 |
720 | * We only have one string. Depending on `defmode', we take |
721 | * it to be either parameters, seed or description. |
8b7938e7 |
722 | */ |
1185e3c5 |
723 | if (defmode == DEF_SEED) { |
8b7938e7 |
724 | seed = id; |
1185e3c5 |
725 | par = desc = NULL; |
726 | } else if (defmode == DEF_DESC) { |
727 | desc = id; |
728 | par = seed = NULL; |
8b7938e7 |
729 | } else { |
8b7938e7 |
730 | par = id; |
1185e3c5 |
731 | seed = desc = NULL; |
8b7938e7 |
732 | } |
733 | } |
734 | |
735 | if (par) { |
1185e3c5 |
736 | game_params *tmpparams; |
737 | tmpparams = me->ourgame->dup_params(me->params); |
738 | me->ourgame->decode_params(tmpparams, par); |
739 | error = me->ourgame->validate_params(tmpparams); |
8b7938e7 |
740 | if (error) { |
1185e3c5 |
741 | me->ourgame->free_params(tmpparams); |
8b7938e7 |
742 | return error; |
743 | } |
f60f7e7c |
744 | if (me->curparams) |
745 | me->ourgame->free_params(me->curparams); |
746 | me->curparams = tmpparams; |
1185e3c5 |
747 | |
748 | /* |
749 | * Now filter only the persistent parts of this state into |
750 | * the long-term params structure, unless we've _only_ |
751 | * received a params string in which case the whole lot is |
752 | * persistent. |
753 | */ |
754 | if (seed || desc) { |
755 | char *tmpstr = me->ourgame->encode_params(tmpparams, FALSE); |
756 | me->ourgame->decode_params(me->params, tmpstr); |
3af70dd4 |
757 | sfree(tmpstr); |
1185e3c5 |
758 | } else { |
759 | me->ourgame->free_params(me->params); |
760 | me->params = me->ourgame->dup_params(tmpparams); |
761 | } |
8b7938e7 |
762 | } |
763 | |
3af70dd4 |
764 | sfree(me->desc); |
765 | me->desc = NULL; |
766 | sfree(me->seedstr); |
767 | me->seedstr = NULL; |
768 | |
1185e3c5 |
769 | if (desc) { |
770 | error = me->ourgame->validate_desc(me->params, desc); |
8b7938e7 |
771 | if (error) |
772 | return error; |
773 | |
1185e3c5 |
774 | me->desc = dupstr(desc); |
775 | me->genmode = GOT_DESC; |
6f2d8d7c |
776 | if (me->aux_info) |
777 | me->ourgame->free_aux_info(me->aux_info); |
778 | me->aux_info = NULL; |
8b7938e7 |
779 | } |
780 | |
1185e3c5 |
781 | if (seed) { |
1185e3c5 |
782 | me->seedstr = dupstr(seed); |
783 | me->genmode = GOT_SEED; |
784 | } |
785 | |
8b7938e7 |
786 | return NULL; |
787 | } |
788 | |
1185e3c5 |
789 | char *midend_game_id(midend_data *me, char *id) |
790 | { |
791 | return midend_game_id_int(me, id, DEF_PARAMS); |
792 | } |
793 | |
5928817c |
794 | char *midend_set_config(midend_data *me, int which, config_item *cfg) |
c8230524 |
795 | { |
8b7938e7 |
796 | char *error; |
c8230524 |
797 | game_params *params; |
798 | |
5928817c |
799 | switch (which) { |
800 | case CFG_SETTINGS: |
be8d5aa1 |
801 | params = me->ourgame->custom_params(cfg); |
802 | error = me->ourgame->validate_params(params); |
c8230524 |
803 | |
5928817c |
804 | if (error) { |
be8d5aa1 |
805 | me->ourgame->free_params(params); |
5928817c |
806 | return error; |
807 | } |
c8230524 |
808 | |
be8d5aa1 |
809 | me->ourgame->free_params(me->params); |
5928817c |
810 | me->params = params; |
811 | break; |
812 | |
813 | case CFG_SEED: |
1185e3c5 |
814 | case CFG_DESC: |
815 | error = midend_game_id_int(me, cfg[0].sval, |
816 | (which == CFG_SEED ? DEF_SEED : DEF_DESC)); |
5928817c |
817 | if (error) |
818 | return error; |
5928817c |
819 | break; |
820 | } |
c8230524 |
821 | |
822 | return NULL; |
823 | } |
9b4b03d3 |
824 | |
825 | char *midend_text_format(midend_data *me) |
826 | { |
827 | if (me->ourgame->can_format_as_text && me->statepos > 0) |
28d0118c |
828 | return me->ourgame->text_format(me->states[me->statepos-1].state); |
9b4b03d3 |
829 | else |
830 | return NULL; |
831 | } |
2ac6d24e |
832 | |
833 | char *midend_solve(midend_data *me) |
834 | { |
835 | game_state *s; |
836 | char *msg; |
837 | |
838 | if (!me->ourgame->can_solve) |
839 | return "This game does not support the Solve operation"; |
840 | |
841 | if (me->statepos < 1) |
842 | return "No game set up to solve"; /* _shouldn't_ happen! */ |
843 | |
844 | msg = "Solve operation failed"; /* game _should_ overwrite on error */ |
28d0118c |
845 | s = me->ourgame->solve(me->states[0].state, me->aux_info, &msg); |
2ac6d24e |
846 | if (!s) |
847 | return msg; |
848 | |
849 | /* |
28d0118c |
850 | * Now enter the solved state as the next move. |
2ac6d24e |
851 | */ |
852 | midend_stop_anim(me); |
853 | while (me->nstates > me->statepos) |
28d0118c |
854 | me->ourgame->free_game(me->states[--me->nstates].state); |
2ac6d24e |
855 | ensure(me); |
28d0118c |
856 | me->states[me->nstates].state = s; |
857 | me->states[me->nstates].special = TRUE; /* created using solve */ |
2ac6d24e |
858 | me->statepos = ++me->nstates; |
859 | me->anim_time = 0.0; |
860 | midend_finish_move(me); |
861 | midend_redraw(me); |
862 | activate_timer(me->frontend); |
863 | return NULL; |
864 | } |