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Files
daac529a9e
argument `dir' which tells them whether this redraw is due to an undo, rather than have them second-guess it from game state. Note that none of the actual games yet take advantage of this; so it hasn't been tested in anger (although it has been inspected by debugging). [originally from svn r4469]
465 lines
11 KiB
C
465 lines
11 KiB
C
/*
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* midend.c: general middle fragment sitting between the
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* platform-specific front end and game-specific back end.
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* Maintains a move list, takes care of Undo and Redo commands, and
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* processes standard keystrokes for undo/redo/new/restart/quit.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include "puzzles.h"
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struct midend_data {
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frontend *frontend;
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random_state *random;
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char *seed;
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int fresh_seed;
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int nstates, statesize, statepos;
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game_params **presets;
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char **preset_names;
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int npresets, presetsize;
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game_params *params;
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game_state **states;
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game_drawstate *drawstate;
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game_state *oldstate;
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game_ui *ui;
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float anim_time, anim_pos;
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float flash_time, flash_pos;
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int dir;
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};
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#define ensure(me) do { \
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if ((me)->nstates >= (me)->statesize) { \
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(me)->statesize = (me)->nstates + 128; \
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(me)->states = sresize((me)->states, (me)->statesize, game_state *); \
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} \
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} while (0)
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midend_data *midend_new(frontend *fe, void *randseed, int randseedsize)
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{
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midend_data *me = snew(midend_data);
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me->frontend = fe;
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me->random = random_init(randseed, randseedsize);
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me->nstates = me->statesize = me->statepos = 0;
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me->states = NULL;
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me->params = default_params();
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me->seed = NULL;
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me->fresh_seed = FALSE;
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me->drawstate = NULL;
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me->oldstate = NULL;
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me->presets = NULL;
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me->preset_names = NULL;
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me->npresets = me->presetsize = 0;
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me->anim_time = me->anim_pos = 0.0F;
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me->flash_time = me->flash_pos = 0.0F;
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me->dir = 0;
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me->ui = NULL;
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return me;
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}
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void midend_free(midend_data *me)
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{
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sfree(me->states);
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sfree(me->seed);
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free_params(me->params);
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sfree(me);
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}
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void midend_size(midend_data *me, int *x, int *y)
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{
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game_size(me->params, x, y);
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}
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void midend_set_params(midend_data *me, game_params *params)
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{
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free_params(me->params);
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me->params = dup_params(params);
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}
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void midend_new_game(midend_data *me)
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{
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while (me->nstates > 0)
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free_game(me->states[--me->nstates]);
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if (me->drawstate)
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game_free_drawstate(me->drawstate);
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assert(me->nstates == 0);
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if (!me->fresh_seed) {
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sfree(me->seed);
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me->seed = new_game_seed(me->params, me->random);
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} else
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me->fresh_seed = FALSE;
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ensure(me);
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me->states[me->nstates++] = new_game(me->params, me->seed);
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me->statepos = 1;
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me->drawstate = game_new_drawstate(me->states[0]);
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if (me->ui)
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free_ui(me->ui);
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me->ui = new_ui(me->states[0]);
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}
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void midend_restart_game(midend_data *me)
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{
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while (me->nstates > 1)
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free_game(me->states[--me->nstates]);
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me->statepos = me->nstates;
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free_ui(me->ui);
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me->ui = new_ui(me->states[0]);
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}
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static int midend_undo(midend_data *me)
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{
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if (me->statepos > 1) {
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me->statepos--;
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me->dir = -1;
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return 1;
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} else
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return 0;
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}
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static int midend_redo(midend_data *me)
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{
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if (me->statepos < me->nstates) {
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me->statepos++;
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me->dir = +1;
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return 1;
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} else
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return 0;
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}
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static void midend_finish_move(midend_data *me)
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{
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float flashtime;
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if (me->oldstate || me->statepos > 1) {
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flashtime = game_flash_length(me->oldstate ? me->oldstate :
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me->states[me->statepos-2],
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me->states[me->statepos-1],
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me->oldstate ? me->dir : +1);
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if (flashtime > 0) {
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me->flash_pos = 0.0F;
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me->flash_time = flashtime;
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}
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}
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if (me->oldstate)
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free_game(me->oldstate);
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me->oldstate = NULL;
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me->anim_pos = me->anim_time = 0;
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me->dir = 0;
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if (me->flash_time == 0 && me->anim_time == 0)
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deactivate_timer(me->frontend);
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else
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activate_timer(me->frontend);
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}
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static void midend_stop_anim(midend_data *me)
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{
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if (me->oldstate || me->anim_time) {
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midend_finish_move(me);
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midend_redraw(me);
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}
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}
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int midend_process_key(midend_data *me, int x, int y, int button)
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{
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game_state *oldstate = dup_game(me->states[me->statepos - 1]);
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float anim_time;
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if (button == 'n' || button == 'N' || button == '\x0E') {
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midend_stop_anim(me);
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midend_new_game(me);
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midend_redraw(me);
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return 1; /* never animate */
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} else if (button == 'r' || button == 'R') {
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midend_stop_anim(me);
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midend_restart_game(me);
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midend_redraw(me);
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return 1; /* never animate */
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} else if (button == 'u' || button == 'u' ||
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button == '\x1A' || button == '\x1F') {
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midend_stop_anim(me);
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if (!midend_undo(me))
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return 1;
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} else if (button == '\x12') {
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midend_stop_anim(me);
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if (!midend_redo(me))
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return 1;
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} else if (button == 'q' || button == 'Q' || button == '\x11') {
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free_game(oldstate);
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return 0;
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} else {
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game_state *s = make_move(me->states[me->statepos-1], me->ui,
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x, y, button);
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if (s == me->states[me->statepos-1]) {
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/*
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* make_move() is allowed to return its input state to
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* indicate that although no move has been made, the UI
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* state has been updated and a redraw is called for.
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*/
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midend_redraw(me);
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return 1;
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} else if (s) {
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midend_stop_anim(me);
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while (me->nstates > me->statepos)
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free_game(me->states[--me->nstates]);
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ensure(me);
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me->states[me->nstates] = s;
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me->statepos = ++me->nstates;
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me->dir = +1;
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} else {
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free_game(oldstate);
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return 1;
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}
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}
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/*
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* See if this move requires an animation.
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*/
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anim_time = game_anim_length(oldstate, me->states[me->statepos-1], me->dir);
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me->oldstate = oldstate;
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if (anim_time > 0) {
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me->anim_time = anim_time;
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} else {
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me->anim_time = 0.0;
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midend_finish_move(me);
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}
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me->anim_pos = 0.0;
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midend_redraw(me);
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activate_timer(me->frontend);
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return 1;
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}
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void midend_redraw(midend_data *me)
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{
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if (me->statepos > 0 && me->drawstate) {
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start_draw(me->frontend);
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if (me->oldstate && me->anim_time > 0 &&
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me->anim_pos < me->anim_time) {
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assert(me->dir != 0);
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game_redraw(me->frontend, me->drawstate, me->oldstate,
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me->states[me->statepos-1], me->dir,
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me->ui, me->anim_pos, me->flash_pos);
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} else {
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game_redraw(me->frontend, me->drawstate, NULL,
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me->states[me->statepos-1], +1 /*shrug*/,
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me->ui, 0.0, me->flash_pos);
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}
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end_draw(me->frontend);
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}
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}
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void midend_timer(midend_data *me, float tplus)
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{
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me->anim_pos += tplus;
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if (me->anim_pos >= me->anim_time ||
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me->anim_time == 0 || !me->oldstate) {
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if (me->anim_time > 0)
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midend_finish_move(me);
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}
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me->flash_pos += tplus;
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if (me->flash_pos >= me->flash_time || me->flash_time == 0) {
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me->flash_pos = me->flash_time = 0;
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}
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if (me->flash_time == 0 && me->anim_time == 0)
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deactivate_timer(me->frontend);
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midend_redraw(me);
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}
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float *midend_colours(midend_data *me, int *ncolours)
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{
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game_state *state = NULL;
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float *ret;
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if (me->nstates == 0) {
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char *seed = new_game_seed(me->params, me->random);
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state = new_game(me->params, seed);
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sfree(seed);
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} else
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state = me->states[0];
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ret = game_colours(me->frontend, state, ncolours);
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if (me->nstates == 0)
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free_game(state);
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return ret;
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}
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int midend_num_presets(midend_data *me)
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{
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if (!me->npresets) {
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char *name;
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game_params *preset;
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while (game_fetch_preset(me->npresets, &name, &preset)) {
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if (me->presetsize <= me->npresets) {
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me->presetsize = me->npresets + 10;
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me->presets = sresize(me->presets, me->presetsize,
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game_params *);
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me->preset_names = sresize(me->preset_names, me->presetsize,
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char *);
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}
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me->presets[me->npresets] = preset;
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me->preset_names[me->npresets] = name;
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me->npresets++;
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}
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}
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return me->npresets;
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}
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void midend_fetch_preset(midend_data *me, int n,
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char **name, game_params **params)
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{
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assert(n >= 0 && n < me->npresets);
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*name = me->preset_names[n];
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*params = me->presets[n];
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}
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int midend_wants_statusbar(midend_data *me)
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{
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return game_wants_statusbar();
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}
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config_item *midend_get_config(midend_data *me, int which, char **wintitle)
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{
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char *titlebuf, *parstr;
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config_item *ret;
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titlebuf = snewn(40 + strlen(game_name), char);
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switch (which) {
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case CFG_SETTINGS:
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sprintf(titlebuf, "%s configuration", game_name);
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*wintitle = dupstr(titlebuf);
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return game_configure(me->params);
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case CFG_SEED:
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sprintf(titlebuf, "%s game selection", game_name);
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*wintitle = dupstr(titlebuf);
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ret = snewn(2, config_item);
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ret[0].type = C_STRING;
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ret[0].name = "Game ID";
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ret[0].ival = 0;
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/*
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* The text going in here will be a string encoding of the
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* parameters, plus a colon, plus the game seed. This is a
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* full game ID.
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*/
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parstr = encode_params(me->params);
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ret[0].sval = snewn(strlen(parstr) + strlen(me->seed) + 2, char);
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sprintf(ret[0].sval, "%s:%s", parstr, me->seed);
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sfree(parstr);
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ret[1].type = C_END;
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ret[1].name = ret[1].sval = NULL;
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ret[1].ival = 0;
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return ret;
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}
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assert(!"We shouldn't be here");
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return NULL;
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}
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char *midend_game_id(midend_data *me, char *id, int def_seed)
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{
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char *error, *par, *seed;
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game_params *params;
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seed = strchr(id, ':');
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if (seed) {
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/*
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* We have a colon separating parameters from game seed. So
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* `par' now points to the parameters string, and `seed' to
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* the seed string.
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*/
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*seed++ = '\0';
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par = id;
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} else {
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/*
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* We only have one string. Depending on `def_seed', we
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* take it to be either parameters or seed.
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*/
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if (def_seed) {
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seed = id;
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par = NULL;
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} else {
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seed = NULL;
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par = id;
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}
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}
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if (par) {
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params = decode_params(par);
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error = validate_params(params);
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if (error) {
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free_params(params);
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return error;
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}
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free_params(me->params);
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me->params = params;
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}
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if (seed) {
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error = validate_seed(me->params, seed);
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if (error)
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return error;
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sfree(me->seed);
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me->seed = dupstr(seed);
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me->fresh_seed = TRUE;
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}
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return NULL;
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}
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char *midend_set_config(midend_data *me, int which, config_item *cfg)
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{
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char *error;
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game_params *params;
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switch (which) {
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case CFG_SETTINGS:
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params = custom_params(cfg);
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error = validate_params(params);
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if (error) {
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free_params(params);
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return error;
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}
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free_params(me->params);
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me->params = params;
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break;
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case CFG_SEED:
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error = midend_game_id(me, cfg[0].sval, TRUE);
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if (error)
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return error;
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break;
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}
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return NULL;
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}
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