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 |
5 | * processes standard keystrokes for undo/redo/new/restart/quit. |
6 | */ |
7f77ea24 |
7 | |
8 | #include <stdio.h> |
5928817c |
9 | #include <string.h> |
7f77ea24 |
10 | #include <assert.h> |
11 | |
12 | #include "puzzles.h" |
13 | |
14 | struct midend_data { |
2ef96bd6 |
15 | frontend *frontend; |
48d70ca9 |
16 | random_state *random; |
17 | |
7f77ea24 |
18 | char *seed; |
5928817c |
19 | int fresh_seed; |
7f77ea24 |
20 | int nstates, statesize, statepos; |
eb2ad6f1 |
21 | |
22 | game_params **presets; |
23 | char **preset_names; |
24 | int npresets, presetsize; |
25 | |
7f77ea24 |
26 | game_params *params; |
27 | game_state **states; |
2ef96bd6 |
28 | game_drawstate *drawstate; |
29 | game_state *oldstate; |
30 | float anim_time, anim_pos; |
87ed82be |
31 | float flash_time, flash_pos; |
7f77ea24 |
32 | }; |
33 | |
34 | #define ensure(me) do { \ |
35 | if ((me)->nstates >= (me)->statesize) { \ |
36 | (me)->statesize = (me)->nstates + 128; \ |
37 | (me)->states = sresize((me)->states, (me)->statesize, game_state *); \ |
38 | } \ |
39 | } while (0) |
40 | |
48d70ca9 |
41 | midend_data *midend_new(frontend *fe, void *randseed, int randseedsize) |
7f77ea24 |
42 | { |
43 | midend_data *me = snew(midend_data); |
44 | |
48d70ca9 |
45 | me->frontend = fe; |
46 | me->random = random_init(randseed, randseedsize); |
7f77ea24 |
47 | me->nstates = me->statesize = me->statepos = 0; |
48 | me->states = NULL; |
49 | me->params = default_params(); |
50 | me->seed = NULL; |
5928817c |
51 | me->fresh_seed = FALSE; |
2ef96bd6 |
52 | me->drawstate = NULL; |
53 | me->oldstate = NULL; |
eb2ad6f1 |
54 | me->presets = NULL; |
55 | me->preset_names = NULL; |
56 | me->npresets = me->presetsize = 0; |
87ed82be |
57 | me->anim_time = me->anim_pos = 0.0F; |
58 | me->flash_time = me->flash_pos = 0.0F; |
7f77ea24 |
59 | |
60 | return me; |
61 | } |
62 | |
63 | void midend_free(midend_data *me) |
64 | { |
65 | sfree(me->states); |
66 | sfree(me->seed); |
67 | free_params(me->params); |
68 | sfree(me); |
69 | } |
70 | |
71 | void midend_size(midend_data *me, int *x, int *y) |
72 | { |
73 | game_size(me->params, x, y); |
74 | } |
75 | |
76 | void midend_set_params(midend_data *me, game_params *params) |
77 | { |
78 | free_params(me->params); |
eb2ad6f1 |
79 | me->params = dup_params(params); |
7f77ea24 |
80 | } |
81 | |
5928817c |
82 | void midend_new_game(midend_data *me) |
7f77ea24 |
83 | { |
84 | while (me->nstates > 0) |
85 | free_game(me->states[--me->nstates]); |
86 | |
2ef96bd6 |
87 | if (me->drawstate) |
88 | game_free_drawstate(me->drawstate); |
89 | |
7f77ea24 |
90 | assert(me->nstates == 0); |
91 | |
5928817c |
92 | if (!me->fresh_seed) { |
93 | sfree(me->seed); |
48d70ca9 |
94 | me->seed = new_game_seed(me->params, me->random); |
5928817c |
95 | } else |
96 | me->fresh_seed = FALSE; |
7f77ea24 |
97 | |
98 | ensure(me); |
99 | me->states[me->nstates++] = new_game(me->params, me->seed); |
100 | me->statepos = 1; |
2ef96bd6 |
101 | me->drawstate = game_new_drawstate(me->states[0]); |
7f77ea24 |
102 | } |
103 | |
104 | void midend_restart_game(midend_data *me) |
105 | { |
106 | while (me->nstates > 1) |
107 | free_game(me->states[--me->nstates]); |
108 | me->statepos = me->nstates; |
109 | } |
110 | |
1482ee76 |
111 | static int midend_undo(midend_data *me) |
7f77ea24 |
112 | { |
1482ee76 |
113 | if (me->statepos > 1) { |
7f77ea24 |
114 | me->statepos--; |
1482ee76 |
115 | return 1; |
116 | } else |
117 | return 0; |
7f77ea24 |
118 | } |
119 | |
1482ee76 |
120 | static int midend_redo(midend_data *me) |
7f77ea24 |
121 | { |
1482ee76 |
122 | if (me->statepos < me->nstates) { |
7f77ea24 |
123 | me->statepos++; |
1482ee76 |
124 | return 1; |
125 | } else |
126 | return 0; |
7f77ea24 |
127 | } |
128 | |
87ed82be |
129 | static void midend_finish_move(midend_data *me) |
130 | { |
131 | float flashtime; |
132 | |
133 | if (me->oldstate || me->statepos > 1) { |
134 | flashtime = game_flash_length(me->oldstate ? me->oldstate : |
135 | me->states[me->statepos-2], |
136 | me->states[me->statepos-1]); |
137 | if (flashtime > 0) { |
138 | me->flash_pos = 0.0F; |
139 | me->flash_time = flashtime; |
140 | } |
141 | } |
142 | |
143 | if (me->oldstate) |
144 | free_game(me->oldstate); |
145 | me->oldstate = NULL; |
146 | me->anim_pos = me->anim_time = 0; |
147 | |
148 | if (me->flash_time == 0 && me->anim_time == 0) |
149 | deactivate_timer(me->frontend); |
150 | else |
151 | activate_timer(me->frontend); |
152 | } |
153 | |
7f77ea24 |
154 | int midend_process_key(midend_data *me, int x, int y, int button) |
155 | { |
2ef96bd6 |
156 | game_state *oldstate = dup_game(me->states[me->statepos - 1]); |
157 | float anim_time; |
158 | |
159 | if (me->oldstate || me->anim_time) { |
87ed82be |
160 | midend_finish_move(me); |
2ef96bd6 |
161 | midend_redraw(me); |
162 | } |
7f77ea24 |
163 | |
164 | if (button == 'n' || button == 'N' || button == '\x0E') { |
5928817c |
165 | midend_new_game(me); |
2ef96bd6 |
166 | midend_redraw(me); |
167 | return 1; /* never animate */ |
7f77ea24 |
168 | } else if (button == 'r' || button == 'R') { |
169 | midend_restart_game(me); |
2ef96bd6 |
170 | midend_redraw(me); |
171 | return 1; /* never animate */ |
7f77ea24 |
172 | } else if (button == 'u' || button == 'u' || |
1482ee76 |
173 | button == '\x1A' || button == '\x1F') { |
174 | if (!midend_undo(me)) |
175 | return 1; |
7f77ea24 |
176 | } else if (button == '\x12') { |
1482ee76 |
177 | if (!midend_redo(me)) |
178 | return 1; |
7f77ea24 |
179 | } else if (button == 'q' || button == 'Q' || button == '\x11') { |
2ef96bd6 |
180 | free_game(oldstate); |
181 | return 0; |
182 | } else { |
183 | game_state *s = make_move(me->states[me->statepos-1], x, y, button); |
184 | |
185 | if (s) { |
186 | while (me->nstates > me->statepos) |
187 | free_game(me->states[--me->nstates]); |
188 | ensure(me); |
189 | me->states[me->nstates] = s; |
190 | me->statepos = ++me->nstates; |
191 | } else { |
192 | free_game(oldstate); |
193 | return 1; |
194 | } |
7f77ea24 |
195 | } |
196 | |
2ef96bd6 |
197 | /* |
198 | * See if this move requires an animation. |
199 | */ |
200 | anim_time = game_anim_length(oldstate, me->states[me->statepos-1]); |
201 | |
87ed82be |
202 | me->oldstate = oldstate; |
2ef96bd6 |
203 | if (anim_time > 0) { |
2ef96bd6 |
204 | me->anim_time = anim_time; |
205 | } else { |
2ef96bd6 |
206 | me->anim_time = 0.0; |
87ed82be |
207 | midend_finish_move(me); |
7f77ea24 |
208 | } |
2ef96bd6 |
209 | me->anim_pos = 0.0; |
210 | |
211 | midend_redraw(me); |
212 | |
213 | activate_timer(me->frontend); |
7f77ea24 |
214 | |
215 | return 1; |
216 | } |
2ef96bd6 |
217 | |
218 | void midend_redraw(midend_data *me) |
219 | { |
220 | if (me->statepos > 0 && me->drawstate) { |
221 | start_draw(me->frontend); |
222 | if (me->oldstate && me->anim_time > 0 && |
223 | me->anim_pos < me->anim_time) { |
224 | game_redraw(me->frontend, me->drawstate, me->oldstate, |
87ed82be |
225 | me->states[me->statepos-1], me->anim_pos, |
226 | me->flash_pos); |
2ef96bd6 |
227 | } else { |
228 | game_redraw(me->frontend, me->drawstate, NULL, |
87ed82be |
229 | me->states[me->statepos-1], 0.0, me->flash_pos); |
2ef96bd6 |
230 | } |
231 | end_draw(me->frontend); |
232 | } |
233 | } |
234 | |
235 | void midend_timer(midend_data *me, float tplus) |
236 | { |
237 | me->anim_pos += tplus; |
238 | if (me->anim_pos >= me->anim_time || |
239 | me->anim_time == 0 || !me->oldstate) { |
87ed82be |
240 | if (me->anim_time > 0) |
241 | midend_finish_move(me); |
242 | } |
243 | me->flash_pos += tplus; |
244 | if (me->flash_pos >= me->flash_time || me->flash_time == 0) { |
245 | me->flash_pos = me->flash_time = 0; |
2ef96bd6 |
246 | } |
87ed82be |
247 | if (me->flash_time == 0 && me->anim_time == 0) |
248 | deactivate_timer(me->frontend); |
2ef96bd6 |
249 | midend_redraw(me); |
250 | } |
251 | |
252 | float *midend_colours(midend_data *me, int *ncolours) |
253 | { |
254 | game_state *state = NULL; |
255 | float *ret; |
256 | |
257 | if (me->nstates == 0) { |
48d70ca9 |
258 | char *seed = new_game_seed(me->params, me->random); |
2ef96bd6 |
259 | state = new_game(me->params, seed); |
260 | sfree(seed); |
261 | } else |
262 | state = me->states[0]; |
263 | |
264 | ret = game_colours(me->frontend, state, ncolours); |
265 | |
266 | if (me->nstates == 0) |
267 | free_game(state); |
268 | |
269 | return ret; |
270 | } |
eb2ad6f1 |
271 | |
272 | int midend_num_presets(midend_data *me) |
273 | { |
274 | if (!me->npresets) { |
275 | char *name; |
276 | game_params *preset; |
277 | |
278 | while (game_fetch_preset(me->npresets, &name, &preset)) { |
279 | if (me->presetsize <= me->npresets) { |
280 | me->presetsize = me->npresets + 10; |
281 | me->presets = sresize(me->presets, me->presetsize, |
282 | game_params *); |
283 | me->preset_names = sresize(me->preset_names, me->presetsize, |
284 | char *); |
285 | } |
286 | |
287 | me->presets[me->npresets] = preset; |
288 | me->preset_names[me->npresets] = name; |
289 | me->npresets++; |
290 | } |
291 | } |
292 | |
293 | return me->npresets; |
294 | } |
295 | |
296 | void midend_fetch_preset(midend_data *me, int n, |
297 | char **name, game_params **params) |
298 | { |
299 | assert(n >= 0 && n < me->npresets); |
300 | *name = me->preset_names[n]; |
301 | *params = me->presets[n]; |
302 | } |
fd1a1a2b |
303 | |
304 | int midend_wants_statusbar(midend_data *me) |
305 | { |
306 | return game_wants_statusbar(); |
307 | } |
c8230524 |
308 | |
5928817c |
309 | config_item *midend_get_config(midend_data *me, int which, char **wintitle) |
c8230524 |
310 | { |
5928817c |
311 | char *titlebuf; |
312 | config_item *ret; |
313 | |
314 | titlebuf = snewn(40 + strlen(game_name), char); |
315 | |
316 | switch (which) { |
317 | case CFG_SETTINGS: |
318 | sprintf(titlebuf, "%s configuration", game_name); |
319 | *wintitle = dupstr(titlebuf); |
320 | return game_configure(me->params); |
321 | case CFG_SEED: |
322 | sprintf(titlebuf, "%s game selection", game_name); |
323 | *wintitle = dupstr(titlebuf); |
324 | |
325 | ret = snewn(2, config_item); |
326 | |
327 | ret[0].type = C_STRING; |
328 | ret[0].name = "Game ID"; |
329 | ret[0].ival = 0; |
330 | ret[0].sval = dupstr(me->seed); |
331 | |
332 | ret[1].type = C_END; |
333 | ret[1].name = ret[1].sval = NULL; |
334 | ret[1].ival = 0; |
335 | |
336 | return ret; |
337 | } |
338 | |
339 | assert(!"We shouldn't be here"); |
340 | return NULL; |
c8230524 |
341 | } |
342 | |
5928817c |
343 | char *midend_set_config(midend_data *me, int which, config_item *cfg) |
c8230524 |
344 | { |
345 | char *error; |
346 | game_params *params; |
347 | |
5928817c |
348 | switch (which) { |
349 | case CFG_SETTINGS: |
350 | params = custom_params(cfg); |
351 | error = validate_params(params); |
c8230524 |
352 | |
5928817c |
353 | if (error) { |
354 | free_params(params); |
355 | return error; |
356 | } |
c8230524 |
357 | |
5928817c |
358 | free_params(me->params); |
359 | me->params = params; |
360 | break; |
361 | |
362 | case CFG_SEED: |
363 | error = validate_seed(me->params, cfg[0].sval); |
364 | if (error) |
365 | return error; |
366 | |
367 | sfree(me->seed); |
368 | me->seed = dupstr(cfg[0].sval); |
369 | me->fresh_seed = TRUE; |
370 | |
371 | break; |
372 | } |
c8230524 |
373 | |
374 | return NULL; |
375 | } |