| 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 | */ |
| 7 | |
| 8 | #include <stdio.h> |
| 9 | #include <assert.h> |
| 10 | |
| 11 | #include "puzzles.h" |
| 12 | |
| 13 | struct midend_data { |
| 14 | frontend *frontend; |
| 15 | char *seed; |
| 16 | int nstates, statesize, statepos; |
| 17 | |
| 18 | game_params **presets; |
| 19 | char **preset_names; |
| 20 | int npresets, presetsize; |
| 21 | |
| 22 | game_params *params; |
| 23 | game_state **states; |
| 24 | game_drawstate *drawstate; |
| 25 | game_state *oldstate; |
| 26 | float anim_time, anim_pos; |
| 27 | float flash_time, flash_pos; |
| 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 | |
| 37 | midend_data *midend_new(frontend *frontend) |
| 38 | { |
| 39 | midend_data *me = snew(midend_data); |
| 40 | |
| 41 | me->frontend = frontend; |
| 42 | me->nstates = me->statesize = me->statepos = 0; |
| 43 | me->states = NULL; |
| 44 | me->params = default_params(); |
| 45 | me->seed = NULL; |
| 46 | me->drawstate = NULL; |
| 47 | me->oldstate = NULL; |
| 48 | me->presets = NULL; |
| 49 | me->preset_names = NULL; |
| 50 | me->npresets = me->presetsize = 0; |
| 51 | me->anim_time = me->anim_pos = 0.0F; |
| 52 | me->flash_time = me->flash_pos = 0.0F; |
| 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); |
| 73 | me->params = dup_params(params); |
| 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 | |
| 81 | if (me->drawstate) |
| 82 | game_free_drawstate(me->drawstate); |
| 83 | |
| 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; |
| 95 | me->drawstate = game_new_drawstate(me->states[0]); |
| 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 | |
| 105 | static int midend_undo(midend_data *me) |
| 106 | { |
| 107 | if (me->statepos > 1) { |
| 108 | me->statepos--; |
| 109 | return 1; |
| 110 | } else |
| 111 | return 0; |
| 112 | } |
| 113 | |
| 114 | static int midend_redo(midend_data *me) |
| 115 | { |
| 116 | if (me->statepos < me->nstates) { |
| 117 | me->statepos++; |
| 118 | return 1; |
| 119 | } else |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 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 | |
| 148 | int midend_process_key(midend_data *me, int x, int y, int button) |
| 149 | { |
| 150 | game_state *oldstate = dup_game(me->states[me->statepos - 1]); |
| 151 | float anim_time; |
| 152 | |
| 153 | if (me->oldstate || me->anim_time) { |
| 154 | midend_finish_move(me); |
| 155 | midend_redraw(me); |
| 156 | } |
| 157 | |
| 158 | if (button == 'n' || button == 'N' || button == '\x0E') { |
| 159 | midend_new_game(me, NULL); |
| 160 | midend_redraw(me); |
| 161 | return 1; /* never animate */ |
| 162 | } else if (button == 'r' || button == 'R') { |
| 163 | midend_restart_game(me); |
| 164 | midend_redraw(me); |
| 165 | return 1; /* never animate */ |
| 166 | } else if (button == 'u' || button == 'u' || |
| 167 | button == '\x1A' || button == '\x1F') { |
| 168 | if (!midend_undo(me)) |
| 169 | return 1; |
| 170 | } else if (button == '\x12') { |
| 171 | if (!midend_redo(me)) |
| 172 | return 1; |
| 173 | } else if (button == 'q' || button == 'Q' || button == '\x11') { |
| 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 | } |
| 189 | } |
| 190 | |
| 191 | /* |
| 192 | * See if this move requires an animation. |
| 193 | */ |
| 194 | anim_time = game_anim_length(oldstate, me->states[me->statepos-1]); |
| 195 | |
| 196 | me->oldstate = oldstate; |
| 197 | if (anim_time > 0) { |
| 198 | me->anim_time = anim_time; |
| 199 | } else { |
| 200 | me->anim_time = 0.0; |
| 201 | midend_finish_move(me); |
| 202 | } |
| 203 | me->anim_pos = 0.0; |
| 204 | |
| 205 | midend_redraw(me); |
| 206 | |
| 207 | activate_timer(me->frontend); |
| 208 | |
| 209 | return 1; |
| 210 | } |
| 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, |
| 219 | me->states[me->statepos-1], me->anim_pos, |
| 220 | me->flash_pos); |
| 221 | } else { |
| 222 | game_redraw(me->frontend, me->drawstate, NULL, |
| 223 | me->states[me->statepos-1], 0.0, me->flash_pos); |
| 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) { |
| 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; |
| 240 | } |
| 241 | if (me->flash_time == 0 && me->anim_time == 0) |
| 242 | deactivate_timer(me->frontend); |
| 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 | } |
| 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 | } |
| 297 | |
| 298 | int midend_wants_statusbar(midend_data *me) |
| 299 | { |
| 300 | return game_wants_statusbar(); |
| 301 | } |
| 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 | } |