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.
18 int nstates, statesize, statepos;
20 game_params **presets;
22 int npresets, presetsize;
26 game_drawstate *drawstate;
28 float anim_time, anim_pos;
29 float flash_time, flash_pos;
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 *); \
39 midend_data *midend_new(frontend *frontend)
41 midend_data *me = snew(midend_data);
43 me->frontend = frontend;
44 me->nstates = me->statesize = me->statepos = 0;
46 me->params = default_params();
48 me->fresh_seed = FALSE;
52 me->preset_names = NULL;
53 me->npresets = me->presetsize = 0;
54 me->anim_time = me->anim_pos = 0.0F;
55 me->flash_time = me->flash_pos = 0.0F;
60 void midend_free(midend_data *me)
64 free_params(me->params);
68 void midend_size(midend_data *me, int *x, int *y)
70 game_size(me->params, x, y);
73 void midend_set_params(midend_data *me, game_params *params)
75 free_params(me->params);
76 me->params = dup_params(params);
79 void midend_new_game(midend_data *me)
81 while (me->nstates > 0)
82 free_game(me->states[--me->nstates]);
85 game_free_drawstate(me->drawstate);
87 assert(me->nstates == 0);
89 if (!me->fresh_seed) {
91 me->seed = new_game_seed(me->params);
93 me->fresh_seed = FALSE;
96 me->states[me->nstates++] = new_game(me->params, me->seed);
98 me->drawstate = game_new_drawstate(me->states[0]);
101 void midend_restart_game(midend_data *me)
103 while (me->nstates > 1)
104 free_game(me->states[--me->nstates]);
105 me->statepos = me->nstates;
108 static int midend_undo(midend_data *me)
110 if (me->statepos > 1) {
117 static int midend_redo(midend_data *me)
119 if (me->statepos < me->nstates) {
126 static void midend_finish_move(midend_data *me)
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]);
135 me->flash_pos = 0.0F;
136 me->flash_time = flashtime;
141 free_game(me->oldstate);
143 me->anim_pos = me->anim_time = 0;
145 if (me->flash_time == 0 && me->anim_time == 0)
146 deactivate_timer(me->frontend);
148 activate_timer(me->frontend);
151 int midend_process_key(midend_data *me, int x, int y, int button)
153 game_state *oldstate = dup_game(me->states[me->statepos - 1]);
156 if (me->oldstate || me->anim_time) {
157 midend_finish_move(me);
161 if (button == 'n' || button == 'N' || button == '\x0E') {
164 return 1; /* never animate */
165 } else if (button == 'r' || button == 'R') {
166 midend_restart_game(me);
168 return 1; /* never animate */
169 } else if (button == 'u' || button == 'u' ||
170 button == '\x1A' || button == '\x1F') {
171 if (!midend_undo(me))
173 } else if (button == '\x12') {
174 if (!midend_redo(me))
176 } else if (button == 'q' || button == 'Q' || button == '\x11') {
180 game_state *s = make_move(me->states[me->statepos-1], x, y, button);
183 while (me->nstates > me->statepos)
184 free_game(me->states[--me->nstates]);
186 me->states[me->nstates] = s;
187 me->statepos = ++me->nstates;
195 * See if this move requires an animation.
197 anim_time = game_anim_length(oldstate, me->states[me->statepos-1]);
199 me->oldstate = oldstate;
201 me->anim_time = anim_time;
204 midend_finish_move(me);
210 activate_timer(me->frontend);
215 void midend_redraw(midend_data *me)
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,
222 me->states[me->statepos-1], me->anim_pos,
225 game_redraw(me->frontend, me->drawstate, NULL,
226 me->states[me->statepos-1], 0.0, me->flash_pos);
228 end_draw(me->frontend);
232 void midend_timer(midend_data *me, float tplus)
234 me->anim_pos += tplus;
235 if (me->anim_pos >= me->anim_time ||
236 me->anim_time == 0 || !me->oldstate) {
237 if (me->anim_time > 0)
238 midend_finish_move(me);
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;
244 if (me->flash_time == 0 && me->anim_time == 0)
245 deactivate_timer(me->frontend);
249 float *midend_colours(midend_data *me, int *ncolours)
251 game_state *state = NULL;
254 if (me->nstates == 0) {
255 char *seed = new_game_seed(me->params);
256 state = new_game(me->params, seed);
259 state = me->states[0];
261 ret = game_colours(me->frontend, state, ncolours);
263 if (me->nstates == 0)
269 int midend_num_presets(midend_data *me)
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,
280 me->preset_names = sresize(me->preset_names, me->presetsize,
284 me->presets[me->npresets] = preset;
285 me->preset_names[me->npresets] = name;
293 void midend_fetch_preset(midend_data *me, int n,
294 char **name, game_params **params)
296 assert(n >= 0 && n < me->npresets);
297 *name = me->preset_names[n];
298 *params = me->presets[n];
301 int midend_wants_statusbar(midend_data *me)
303 return game_wants_statusbar();
306 config_item *midend_get_config(midend_data *me, int which, char **wintitle)
311 titlebuf = snewn(40 + strlen(game_name), char);
315 sprintf(titlebuf, "%s configuration", game_name);
316 *wintitle = dupstr(titlebuf);
317 return game_configure(me->params);
319 sprintf(titlebuf, "%s game selection", game_name);
320 *wintitle = dupstr(titlebuf);
322 ret = snewn(2, config_item);
324 ret[0].type = C_STRING;
325 ret[0].name = "Game ID";
327 ret[0].sval = dupstr(me->seed);
330 ret[1].name = ret[1].sval = NULL;
336 assert(!"We shouldn't be here");
340 char *midend_set_config(midend_data *me, int which, config_item *cfg)
347 params = custom_params(cfg);
348 error = validate_params(params);
355 free_params(me->params);
360 error = validate_seed(me->params, cfg[0].sval);
365 me->seed = dupstr(cfg[0].sval);
366 me->fresh_seed = TRUE;