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