Add ability to set "keep screen on" for iOS

platform/iphone/app_delegate.mm

@@ -57,6 +57,7 @@
 #endif
 
 Error _shell_open(String);
+void _set_keep_screen_on(bool p_enabled);
 
 Error _shell_open(String p_uri) {
 	NSString* url = [[NSString alloc] initWithUTF8String:p_uri.utf8().get_data()];
@@ -70,6 +71,10 @@ Error _shell_open(String p_uri) {
 	return OK;
 };
 
+void _set_keep_screen_on(bool p_enabled) {
+	[[UIApplication sharedApplication] setIdleTimerDisabled:(BOOL)p_enabled];
+};
+
 @implementation AppDelegate
 
 @synthesize window;
@@ -212,8 +217,8 @@ static int frame_count = 0;
 
 	[application setStatusBarHidden:YES withAnimation:UIStatusBarAnimationNone];
 	// disable idle timer
-	application.idleTimerDisabled = YES;
-
+	//application.idleTimerDisabled = YES;
+    
 	//Create a full-screen window
 	window = [[UIWindow alloc] initWithFrame:rect];
 	//window.autoresizesSubviews = YES;
@@ -238,6 +243,7 @@ static int frame_count = 0;
 	view_controller.view = glView;
 	window.rootViewController = view_controller;
 
+    _set_keep_screen_on(bool(GLOBAL_DEF("display/set_keep_screen_on",true)) ? YES : NO);
 	glView.useCADisplayLink = bool(GLOBAL_DEF("display.iOS/use_cadisplaylink",true)) ? YES : NO;
 	printf("cadisaplylink: %d", glView.useCADisplayLink);
 	glView.animationInterval = 1.0 / kRenderingFrequency;

platform/iphone/os_iphone.cpp

@@ -454,6 +454,7 @@ bool OSIPhone::has_virtual_keyboard() const {
 extern void _show_keyboard(String p_existing);
 extern void _hide_keyboard();
 extern Error _shell_open(String p_uri);
+extern void _set_keep_screen_on(bool p_enabled);
 
 void OSIPhone::show_virtual_keyboard(const String& p_existing_text,const Rect2& p_screen_rect) {
 	_show_keyboard(p_existing_text);
@@ -467,6 +468,10 @@ Error OSIPhone::shell_open(String p_uri) {
 	return _shell_open(p_uri);
 };
 
+void OSIPhone::set_keep_screen_on(bool p_enabled) {
+	OS::set_keep_screen_on(p_enabled);
+	_set_keep_screen_on(p_enabled);
+};
 
 void OSIPhone::set_cursor_shape(CursorShape p_shape) {
 

platform/iphone/os_iphone.h

@@ -166,6 +166,8 @@ public:
 	virtual void set_video_mode(const VideoMode& p_video_mode,int p_screen=0);
 	virtual VideoMode get_video_mode(int p_screen=0) const;
 	virtual void get_fullscreen_mode_list(List<VideoMode> *p_list,int p_screen=0) const;
+    
+	virtual void set_keep_screen_on(bool p_enabled);
 
 	virtual bool can_draw() const;