From 6e42ddd31b5ca71f48c6260b01fc49b2451d0a56 Mon Sep 17 00:00:00 2001
From: Simon Tatham <anakin@pobox.com>
Date: Mon, 3 May 2004 08:51:31 +0000
Subject: Implement selection of game seeds, by reusing the config box
 mechanism I've just invented (the midend handles the standard game selection
 configuration). Each game is now required to validate its own seed data
 before attempting to base a game on it and potentially confusing itself.

[originally from svn r4186]
---
 midend.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 64 insertions(+), 17 deletions(-)

(limited to 'midend.c')

diff --git a/midend.c b/midend.c
index ed8286b..818b278 100644
--- a/midend.c
+++ b/midend.c
@@ -6,6 +6,7 @@
  */
 
 #include <stdio.h>
+#include <string.h>
 #include <assert.h>
 
 #include "puzzles.h"
@@ -13,6 +14,7 @@
 struct midend_data {
     frontend *frontend;
     char *seed;
+    int fresh_seed;
     int nstates, statesize, statepos;
 
     game_params **presets;
@@ -43,6 +45,7 @@ midend_data *midend_new(frontend *frontend)
     me->states = NULL;
     me->params = default_params();
     me->seed = NULL;
+    me->fresh_seed = FALSE;
     me->drawstate = NULL;
     me->oldstate = NULL;
     me->presets = NULL;
@@ -73,7 +76,7 @@ void midend_set_params(midend_data *me, game_params *params)
     me->params = dup_params(params);
 }
 
-void midend_new_game(midend_data *me, char *seed)
+void midend_new_game(midend_data *me)
 {
     while (me->nstates > 0)
 	free_game(me->states[--me->nstates]);
@@ -83,11 +86,11 @@ void midend_new_game(midend_data *me, char *seed)
 
     assert(me->nstates == 0);
 
-    sfree(me->seed);
-    if (seed)
-	me->seed = dupstr(seed);
-    else
+    if (!me->fresh_seed) {
+	sfree(me->seed);
 	me->seed = new_game_seed(me->params);
+    } else
+	me->fresh_seed = FALSE;
 
     ensure(me);
     me->states[me->nstates++] = new_game(me->params, me->seed);
@@ -156,7 +159,7 @@ int midend_process_key(midend_data *me, int x, int y, int button)
     }
 
     if (button == 'n' || button == 'N' || button == '\x0E') {
-	midend_new_game(me, NULL);
+	midend_new_game(me);
         midend_redraw(me);
         return 1;                      /* never animate */
     } else if (button == 'r' || button == 'R') {
@@ -300,26 +303,70 @@ int midend_wants_statusbar(midend_data *me)
     return game_wants_statusbar();
 }
 
-config_item *midend_get_config(midend_data *me)
+config_item *midend_get_config(midend_data *me, int which, char **wintitle)
 {
-    return game_configure(me->params);
+    char *titlebuf;
+    config_item *ret;
+
+    titlebuf = snewn(40 + strlen(game_name), char);
+
+    switch (which) {
+      case CFG_SETTINGS:
+	sprintf(titlebuf, "%s configuration", game_name);
+	*wintitle = dupstr(titlebuf);
+	return game_configure(me->params);
+      case CFG_SEED:
+	sprintf(titlebuf, "%s game selection", game_name);
+	*wintitle = dupstr(titlebuf);
+
+	ret = snewn(2, config_item);
+
+	ret[0].type = C_STRING;
+	ret[0].name = "Game ID";
+	ret[0].ival = 0;
+	ret[0].sval = dupstr(me->seed);
+
+	ret[1].type = C_END;
+	ret[1].name = ret[1].sval = NULL;
+	ret[1].ival = 0;
+
+	return ret;
+    }
+
+    assert(!"We shouldn't be here");
+    return NULL;
 }
 
-char *midend_set_config(midend_data *me, config_item *cfg)
+char *midend_set_config(midend_data *me, int which, config_item *cfg)
 {
     char *error;
     game_params *params;
 
-    params = custom_params(cfg);
-    error = validate_params(params);
+    switch (which) {
+      case CFG_SETTINGS:
+	params = custom_params(cfg);
+	error = validate_params(params);
 
-    if (error) {
-	free_params(params);
-	return error;
-    }
+	if (error) {
+	    free_params(params);
+	    return error;
+	}
 
-    free_params(me->params);
-    me->params = params;
+	free_params(me->params);
+	me->params = params;
+	break;
+
+      case CFG_SEED:
+	error = validate_seed(me->params, cfg[0].sval);
+	if (error)
+	    return error;
+
+	sfree(me->seed);
+	me->seed = dupstr(cfg[0].sval);
+	me->fresh_seed = TRUE;
+
+	break;
+    }
 
     return NULL;
 }
-- 
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