function initializeFullscreenEvents(){
	["fullscreenchange", "webkitfullscreenchange", "mozfullscreenchange", "msfullscreenchange"].forEach(
		eventType => document.addEventListener(eventType, onFullscreenChange, false)
	);
}

/* View in fullscreen */
var elem = document.documentElement;
function openFullscreen() {
	if (elem.requestFullscreen) {
		elem.requestFullscreen();
	} else if (elem.mozRequestFullScreen) { /* Firefox */
		elem.mozRequestFullScreen();
	} else if (elem.webkitRequestFullscreen) { /* Chrome, Safari and Opera */
		elem.webkitRequestFullscreen();
	} else if (elem.msRequestFullscreen) { /* IE/Edge */
		elem.msRequestFullscreen();
	}
}

/* Close fullscreen */
function closeFullscreen() {
	if (document.exitFullscreen) {
		document.exitFullscreen();
	} else if (document.mozCancelFullScreen) { /* Firefox */
		document.mozCancelFullScreen();
	} else if (document.webkitExitFullscreen) { /* Chrome, Safari and Opera */
		document.webkitExitFullscreen();
	} else if (document.msExitFullscreen) { /* IE/Edge */
		document.msExitFullscreen();
	}
}

function updateFullscreen() {
	var isInFullScreen = (document.fullscreenElement && document.fullscreenElement !== null) ||
		(document.webkitFullscreenElement && document.webkitFullscreenElement !== null) ||
		(document.mozFullScreenElement && document.mozFullScreenElement !== null) ||
		(document.msFullscreenElement && document.msFullscreenElement !== null);
	if (!isInFullScreen)
		openFullscreen();
	else
		closeFullscreen();
}

function onFullscreenChange(){
	if(!gameInstance)
		return;
	
	if (document.fullscreenElement) {
		gameInstance.SendMessage('JsManager', 'ApplicationFullscreenChanged', 1);
	}
	else{
		gameInstance.SendMessage('JsManager', 'ApplicationFullscreenChanged', 0);
	}
}