X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/720a8fb73f1ec4860da71afb8cf0d18bfddf7691..d3a026ed4258c207b6309802cc2c92eb0a812aac:/midend.c

diff --git a/midend.c b/midend.c
index 2adbf9f..ed8286b 100644
--- a/midend.c
+++ b/midend.c
@@ -4,3 +4,322 @@
  * Maintains a move list, takes care of Undo and Redo commands, and
  * processes standard keystrokes for undo/redo/new/restart/quit.
  */
+
+#include <stdio.h>
+#include <assert.h>
+
+#include "puzzles.h"
+
+struct midend_data {
+    frontend *frontend;
+    char *seed;
+    int nstates, statesize, statepos;
+
+    game_params **presets;
+    char **preset_names;
+    int npresets, presetsize;
+
+    game_params *params;
+    game_state **states;
+    game_drawstate *drawstate;
+    game_state *oldstate;
+    float anim_time, anim_pos;
+    float flash_time, flash_pos;
+};
+
+#define ensure(me) do { \
+    if ((me)->nstates >= (me)->statesize) { \
+	(me)->statesize = (me)->nstates + 128; \
+	(me)->states = sresize((me)->states, (me)->statesize, game_state *); \
+    } \
+} while (0)
+
+midend_data *midend_new(frontend *frontend)
+{
+    midend_data *me = snew(midend_data);
+
+    me->frontend = frontend;
+    me->nstates = me->statesize = me->statepos = 0;
+    me->states = NULL;
+    me->params = default_params();
+    me->seed = NULL;
+    me->drawstate = NULL;
+    me->oldstate = NULL;
+    me->presets = NULL;
+    me->preset_names = NULL;
+    me->npresets = me->presetsize = 0;
+    me->anim_time = me->anim_pos = 0.0F;
+    me->flash_time = me->flash_pos = 0.0F;
+
+    return me;
+}
+
+void midend_free(midend_data *me)
+{
+    sfree(me->states);
+    sfree(me->seed);
+    free_params(me->params);
+    sfree(me);
+}
+
+void midend_size(midend_data *me, int *x, int *y)
+{
+    game_size(me->params, x, y);
+}
+
+void midend_set_params(midend_data *me, game_params *params)
+{
+    free_params(me->params);
+    me->params = dup_params(params);
+}
+
+void midend_new_game(midend_data *me, char *seed)
+{
+    while (me->nstates > 0)
+	free_game(me->states[--me->nstates]);
+
+    if (me->drawstate)
+        game_free_drawstate(me->drawstate);
+
+    assert(me->nstates == 0);
+
+    sfree(me->seed);
+    if (seed)
+	me->seed = dupstr(seed);
+    else
+	me->seed = new_game_seed(me->params);
+
+    ensure(me);
+    me->states[me->nstates++] = new_game(me->params, me->seed);
+    me->statepos = 1;
+    me->drawstate = game_new_drawstate(me->states[0]);
+}
+
+void midend_restart_game(midend_data *me)
+{
+    while (me->nstates > 1)
+	free_game(me->states[--me->nstates]);
+    me->statepos = me->nstates;
+}
+
+static int midend_undo(midend_data *me)
+{
+    if (me->statepos > 1) {
+	me->statepos--;
+        return 1;
+    } else
+        return 0;
+}
+
+static int midend_redo(midend_data *me)
+{
+    if (me->statepos < me->nstates) {
+	me->statepos++;
+        return 1;
+    } else
+        return 0;
+}
+
+static void midend_finish_move(midend_data *me)
+{
+    float flashtime;
+
+    if (me->oldstate || me->statepos > 1) {
+	flashtime = game_flash_length(me->oldstate ? me->oldstate :
+				      me->states[me->statepos-2],
+				      me->states[me->statepos-1]);
+	if (flashtime > 0) {
+	    me->flash_pos = 0.0F;
+	    me->flash_time = flashtime;
+	}
+    }
+
+    if (me->oldstate)
+	free_game(me->oldstate);
+    me->oldstate = NULL;
+    me->anim_pos = me->anim_time = 0;
+
+    if (me->flash_time == 0 && me->anim_time == 0)
+	deactivate_timer(me->frontend);
+    else
+	activate_timer(me->frontend);
+}
+
+int midend_process_key(midend_data *me, int x, int y, int button)
+{
+    game_state *oldstate = dup_game(me->states[me->statepos - 1]);
+    float anim_time;
+
+    if (me->oldstate || me->anim_time) {
+	midend_finish_move(me);
+        midend_redraw(me);
+    }
+
+    if (button == 'n' || button == 'N' || button == '\x0E') {
+	midend_new_game(me, NULL);
+        midend_redraw(me);
+        return 1;                      /* never animate */
+    } else if (button == 'r' || button == 'R') {
+	midend_restart_game(me);
+        midend_redraw(me);
+        return 1;                      /* never animate */
+    } else if (button == 'u' || button == 'u' ||
+               button == '\x1A' || button == '\x1F') {
+	if (!midend_undo(me))
+            return 1;
+    } else if (button == '\x12') {
+	if (!midend_redo(me))
+            return 1;
+    } else if (button == 'q' || button == 'Q' || button == '\x11') {
+	free_game(oldstate);
+        return 0;
+    } else {
+        game_state *s = make_move(me->states[me->statepos-1], x, y, button);
+
+        if (s) {
+            while (me->nstates > me->statepos)
+                free_game(me->states[--me->nstates]);
+            ensure(me);
+            me->states[me->nstates] = s;
+            me->statepos = ++me->nstates;
+        } else {
+            free_game(oldstate);
+            return 1;
+        }
+    }
+
+    /*
+     * See if this move requires an animation.
+     */
+    anim_time = game_anim_length(oldstate, me->states[me->statepos-1]);
+
+    me->oldstate = oldstate;
+    if (anim_time > 0) {
+        me->anim_time = anim_time;
+    } else {
+        me->anim_time = 0.0;
+	midend_finish_move(me);
+    }
+    me->anim_pos = 0.0;
+
+    midend_redraw(me);
+
+    activate_timer(me->frontend);
+
+    return 1;
+}
+
+void midend_redraw(midend_data *me)
+{
+    if (me->statepos > 0 && me->drawstate) {
+        start_draw(me->frontend);
+        if (me->oldstate && me->anim_time > 0 &&
+            me->anim_pos < me->anim_time) {
+            game_redraw(me->frontend, me->drawstate, me->oldstate,
+                        me->states[me->statepos-1], me->anim_pos,
+			me->flash_pos);
+        } else {
+            game_redraw(me->frontend, me->drawstate, NULL,
+                        me->states[me->statepos-1], 0.0, me->flash_pos);
+        }
+        end_draw(me->frontend);
+    }
+}
+
+void midend_timer(midend_data *me, float tplus)
+{
+    me->anim_pos += tplus;
+    if (me->anim_pos >= me->anim_time ||
+        me->anim_time == 0 || !me->oldstate) {
+	if (me->anim_time > 0)
+	    midend_finish_move(me);
+    }
+    me->flash_pos += tplus;
+    if (me->flash_pos >= me->flash_time || me->flash_time == 0) {
+	me->flash_pos = me->flash_time = 0;
+    }
+    if (me->flash_time == 0 && me->anim_time == 0)
+	deactivate_timer(me->frontend);
+    midend_redraw(me);
+}
+
+float *midend_colours(midend_data *me, int *ncolours)
+{
+    game_state *state = NULL;
+    float *ret;
+
+    if (me->nstates == 0) {
+        char *seed = new_game_seed(me->params);
+        state = new_game(me->params, seed);
+        sfree(seed);
+    } else
+        state = me->states[0];
+
+    ret = game_colours(me->frontend, state, ncolours);
+
+    if (me->nstates == 0)
+        free_game(state);
+
+    return ret;
+}
+
+int midend_num_presets(midend_data *me)
+{
+    if (!me->npresets) {
+        char *name;
+        game_params *preset;
+
+        while (game_fetch_preset(me->npresets, &name, &preset)) {
+            if (me->presetsize <= me->npresets) {
+                me->presetsize = me->npresets + 10;
+                me->presets = sresize(me->presets, me->presetsize,
+                                      game_params *);
+                me->preset_names = sresize(me->preset_names, me->presetsize,
+                                           char *);
+            }
+
+            me->presets[me->npresets] = preset;
+            me->preset_names[me->npresets] = name;
+            me->npresets++;
+        }
+    }
+
+    return me->npresets;
+}
+
+void midend_fetch_preset(midend_data *me, int n,
+                         char **name, game_params **params)
+{
+    assert(n >= 0 && n < me->npresets);
+    *name = me->preset_names[n];
+    *params = me->presets[n];
+}
+
+int midend_wants_statusbar(midend_data *me)
+{
+    return game_wants_statusbar();
+}
+
+config_item *midend_get_config(midend_data *me)
+{
+    return game_configure(me->params);
+}
+
+char *midend_set_config(midend_data *me, config_item *cfg)
+{
+    char *error;
+    game_params *params;
+
+    params = custom_params(cfg);
+    error = validate_params(params);
+
+    if (error) {
+	free_params(params);
+	return error;
+    }
+
+    free_params(me->params);
+    me->params = params;
+
+    return NULL;
+}