Add a setting type which is completly user-defined. This setting type cannot be used by the regular menu macros (e.g MENUITEM_SETTING() macro) so if you are goign to use this type remember to implement the setting screen seperately (using option_select() if you can)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18983 a1c6a512-1295-4272-9138-f99709370657

apps/settings.c

@@ -282,6 +282,9 @@ bool settings_load_config(const char* file, bool apply)
             {
                 switch (settings[i].flags&F_T_MASK)
                 {
+                    case F_T_CUSTOM:
+                        settings[i].custom_setting->load_from_cfg(settings[i].setting, value);
+                        break;
                     case F_T_INT:
                     case F_T_UINT:
 #ifdef HAVE_LCD_COLOR
@@ -419,6 +422,10 @@ static bool is_changed(int setting_id)
     const struct settings_list *setting = &settings[setting_id];
     switch (setting->flags&F_T_MASK)
     {
+    case F_T_CUSTOM:
+        return setting->custom_setting->is_changed(setting->setting,
+                                            setting->default_val.custom);
+        break;
     case F_T_INT:
     case F_T_UINT:
         if (setting->flags&F_DEF_ISFUNC)
@@ -498,6 +505,10 @@ static bool settings_write_config(const char* filename, int options)
         }
         switch (settings[i].flags&F_T_MASK)
         {
+            case F_T_CUSTOM:
+                settings[i].custom_setting->write_to_cfg(settings[i].setting,
+                                                          value, MAX_PATH);
+                break;
             case F_T_INT:
             case F_T_UINT:
 #ifdef HAVE_LCD_COLOR
@@ -952,6 +963,10 @@ void reset_setting(const struct settings_list *setting, void *var)
 {
     switch (setting->flags&F_T_MASK)
     {
+    case F_T_CUSTOM:
+        setting->custom_setting->set_default(setting->setting,
+                                             setting->default_val.custom);
+        break;
     case F_T_INT:
     case F_T_UINT:
         if (setting->flags&F_DEF_ISFUNC)

apps/settings_list.c

@@ -165,6 +165,14 @@
                     {cb, formatter, get_talk_id, unit, count,       \
                     (const int[]){__VA_ARGS__}}}}}
 
+#define CUSTOM_SETTING(flags, var, lang_id, default, name,              \
+                       load_from_cfg, write_to_cfg,                     \
+                       is_change, set_default)                          \
+            {flags|F_CUSTOM_SETTING|F_T_CUSTOM|F_BANFROMQS,             \
+                &global_settings.var, lang_id,                          \
+                {.custom = (void*)default}, name, NULL,                 \
+            {.custom_setting = (struct custom_setting[]){               \
+        {load_from_cfg, write_to_cfg, is_change, set_default}}}}
 /* some sets of values which are used more than once, to save memory */
 static const char off_on[] = "off,on";
 static const char off_on_ask[] = "off,on,ask";

apps/settings_list.h

@@ -35,6 +35,7 @@ union storage_type {
     char *charptr;
     unsigned char *ucharptr;
     _isfunc_type func;
+    void* custom;
 };
 /* the variable type for the setting */
 #define F_T_INT      1
@@ -42,6 +43,7 @@ union storage_type {
 #define F_T_BOOL     3
 #define F_T_CHARPTR  4
 #define F_T_UCHARPTR 5
+#define F_T_CUSTOM   6 /* MUST use struct custom_setting below */
 #define F_T_MASK     0x7
 
 struct sound_setting {
@@ -104,6 +106,35 @@ struct table_setting {
 #define F_MAX_ISFUNC    0x200000 /* max(above) is function pointer to above type */
 #define F_DEF_ISFUNC    0x400000 /* default_val is function pointer to above type */
 
+/* The next stuff is used when none of the other types work.
+   Should really only be used if the value you want to store in global_settings
+   is very different to the string you want to use in the config. */
+#define F_CUSTOM_SETTING 0x8000
+struct custom_setting {
+    /* load the saved value from the .cfg
+        setting: pointer into global_settings
+        value: the text from the .cfg 
+     */
+    void (*load_from_cfg)(void* setting, char*value);
+    /* store the value into a .cfg
+        setting: pointer into global_settings
+        buf/buf_len: buffer and length to write the string into.
+       Returns the string.
+     */
+    char* (*write_to_cfg)(void* setting, char*buf, int buf_len);
+    /* Check if the setting has been changed from the default.
+        setting: pointer into global_settings
+        defaultval: the value given in the settings_list.c macro
+       Return true if the setting was changed
+     */
+    bool (*is_changed)(void* setting, void* defaultval);
+    /* Set the setting back to its default value.
+        setting: pointer into global_settings
+        defaultval: the value given in the settings_list.c macro
+     */
+    void (*set_default)(void* setting, void* defaultval);
+};
+
 #define F_THEMESETTING  0x0800000
 #define F_RECSETTING    0x1000000
 #define F_EQSETTING     0x2000000
@@ -137,6 +168,7 @@ struct settings_list {
         const struct int_setting *int_setting; /* use F_INT_SETTING */
         const struct choice_setting *choice_setting; /* F_CHOICE_SETTING */
         const struct table_setting *table_setting; /* F_TABLE_SETTING */
+        const struct custom_setting *custom_setting; /* F_CUSTOM_SETTING */
     };
 };
 const struct settings_list* get_settings_list(int*count);