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