(iOS) Improve handling of path settings some:

The file browser will start in the directory of the currently seleected file.
   The setting menu will display only the filename instead of the full path.
   Path settings can specify a list of extensions to search for.

apple/common/setting_data.c

@@ -199,6 +199,8 @@ void setting_data_set_with_string_representation(const rarch_setting_t* setting,
    if (!setting || !value)
       return;
       
+   // TODO: Clamp to min/max
+   
    switch (setting->type)
    {
       case ST_INT:    sscanf(value, "%d", setting->value.integer); break;
@@ -314,7 +316,9 @@ static const uint32_t features = SD_FEATURE_VIDEO_MODE | SD_FEATURE_SHADERS |
 #define CONFIG_BIND(TARGET, PLAYER, NAME, SHORT, DEF) \
    NEXT = setting_data_bind_setting  (NAME, SHORT, &TARGET, PLAYER, DEF);
 
-#define FLAGS(FLAGS) (list[index - 1]).flags = FLAGS;
+#define WITH_FLAGS(FLAGS) (list[index - 1]).flags = FLAGS;
+#define WITH_RANGE(MIN, MAX) (list[index - 1]).min = MIN; (list[index - 1]).max = MAX;
+#define WITH_VALUES(VALUES) (list[index -1]).values = VALUES;
 
 // TODO: Add black_frame_insertion, swap_interval msg_color video.rotation audio.block_frames audio.in_rate fast_forward_ratio
 //       rgui_show_start_screen
@@ -512,8 +516,8 @@ const rarch_setting_t* setting_data_get_list()
 
       #ifdef HAVE_OVERLAY
          START_SUB_GROUP("Overlay")
-            CONFIG_PATH(g_settings.input.overlay, "input_overlay", "Input Overlay", DEFAULT_ME_YO)
+            CONFIG_PATH(g_settings.input.overlay, "input_overlay", "Input Overlay", DEFAULT_ME_YO) WITH_FLAGS(SD_FLAG_PATH_FILE) WITH_VALUES("cfg")
-            CONFIG_FLOAT(g_settings.input.overlay_opacity, "input_overlay_opacity", "Overlay Opacity", 1.0f)
+            CONFIG_FLOAT(g_settings.input.overlay_opacity, "input_overlay_opacity", "Overlay Opacity", 1.0f) WITH_RANGE(0, 1)
             CONFIG_FLOAT(g_settings.input.overlay_scale, "input_overlay_scale", "Overlay Scale", 1.0f)
          END_SUB_GROUP()
       #endif

apple/common/setting_data.h

@@ -54,6 +54,7 @@ typedef struct
    double min;
    double max;
    
+   const char* values;
    uint64_t flags;
    
    union

apple/iOS/browser.m

@@ -91,14 +91,16 @@ static void file_action(enum file_action action, NSString* source, NSString* tar
 @implementation RADirectoryList
 {
    NSString* _path;
+   NSString* _extensions;
 }
 
-- (id)initWithPath:(NSString*)path delegate:(id<RADirectoryListDelegate>)delegate
+- (id)initWithPath:(NSString*)path extensions:(const char*)extensions forDirectory:(bool)forDirectory delegate:(id<RADirectoryListDelegate>)delegate
 {
    if ((self = [super initWithStyle:UITableViewStylePlain]))
    {
       _path = path ? path : NSHomeDirectory();
       _directoryDelegate = delegate;
+      _extensions = @(extensions);
 
       self = [super initWithStyle:UITableViewStylePlain];
       self.hidesHeaders = YES;
@@ -157,7 +159,7 @@ static void file_action(enum file_action action, NSString* source, NSString* tar
       [self.sections addObject:[NSMutableArray arrayWithObject:i]];
    
    // List contents
-   struct string_list* contents = dir_list_new(_path.UTF8String, 0, true);
+   struct string_list* contents = dir_list_new(_path.UTF8String, _extensions.UTF8String, true);
    
    if (contents)
    {

apple/iOS/menu.m

@@ -171,7 +171,12 @@
    result.textLabel.text = @(self.setting->short_description);
 
    if (self.setting)
+   {
       result.detailTextLabel.text = @(setting_data_get_string_representation(self.setting, buffer, sizeof(buffer)));
+      
+      if (self.setting->type == ST_PATH)
+         result.detailTextLabel.text = [result.detailTextLabel.text lastPathComponent];
+   }
    return result;
 }
 
@@ -264,7 +269,8 @@
 
 - (void)wasSelectedOnTableView:(UITableView*)tableView ofController:(UIViewController*)controller
 {
-   RADirectoryList* list = [[RADirectoryList alloc] initWithPath:nil delegate:self];
+   NSString* path = [@(self.setting->value.string) stringByDeletingLastPathComponent];
+   RADirectoryList* list = [[RADirectoryList alloc] initWithPath:path extensions:self.setting->values forDirectory:false delegate:self];
    [controller.navigationController pushViewController:list animated:YES];
 }
 
@@ -411,7 +417,7 @@
    NSString* ragPath = [rootPath stringByAppendingPathComponent:@"RetroArchGames"];
    NSString* target = path_is_directory(ragPath.UTF8String) ? ragPath : rootPath;
 
-   [self.navigationController pushViewController:[[RADirectoryList alloc] initWithPath:target delegate:self] animated:YES];
+   [self.navigationController pushViewController:[[RADirectoryList alloc] initWithPath:target extensions:NULL forDirectory:false delegate:self] animated:YES];
 }
 
 - (void)loadHistory

apple/iOS/views.h

@@ -37,7 +37,7 @@
 @interface RADirectoryList : RAMenuBase<UIActionSheetDelegate>
 @property (nonatomic, weak) id<RADirectoryListDelegate> directoryDelegate;
 @property (nonatomic, weak) RADirectoryItem* selectedItem;
-- (id)initWithPath:(NSString*)path delegate:(id<RADirectoryListDelegate>)delegate;
+- (id)initWithPath:(NSString*)path extensions:(const char*)extensions forDirectory:(bool)forDirectory delegate:(id<RADirectoryListDelegate>)delegate;
 - (void)browseTo:(NSString*)path;
 @end