Do no periodic events when the webchannel is busy

Author: Roland Tapken

ui/js/ViewModel.js

@@ -101,25 +101,29 @@
 		webchannel.call(window.cp750bridge.getState).done(state);
 		window.setInterval(function() {
 			// Update state every 10 seconds
-			webchannel.call(window.cp750bridge.getState).done(state).error(function(message) {
-				state('disconnected');
-				error(message);
-			});
+			if (webchannel.idle()) {
+				webchannel.call(window.cp750bridge.getState).done(state).error(function(message) {
+					state('disconnected');
+					error(message);
+				});
+			}
 		}, 30000);
 
 		window.setInterval(function() {
 			// Update current time
 			currentTime(new Date());
 
-			// Check if we need to autoconnect
-			if (state()  !== 'connected') {
-				if (autoconnectTimeout() === 0) {
-					connect();
+			if (webchannel.idle()) {
+				// Check if we need to autoconnect
+				if (state()  !== 'connected') {
+					if (autoconnectTimeout() === 0) {
+						connect();
+					}
+					autoconnectTimeout(autoconnectTimeout() - 1);
+				} else {
+					// Upload values
+					loadValues();
 				}
-				autoconnectTimeout(autoconnectTimeout() - 1);
-			} else {
-				// Upload values
-				loadValues();
 			}
 		}, 1000);
 

ui/js/webchannel.js

@@ -10,14 +10,18 @@
 	var ERROR_PREFIX = '⚠';
 
 	define(function() {
+		var active_calls = 0;
+
 		function call(method) {
 			var args = [];
 			for (var i = 1; i < arguments.length; i+=1) {
 				args.push(arguments[i]);
 			}
 			var result, error;
 			var listeners = [], errListeners = [];
+			active_calls++;
 			args.push(function(value) {
+				active_calls--;
 				var i;
 				if (typeof value === 'string' && value !== '' && value.charAt(0) === ERROR_PREFIX) {
 					error = value.substring(1);
@@ -60,7 +64,10 @@
 		}
 
 		return {
-			call: call
+			call: call,
+			idle: function() {
+				return active_calls == 0;
+			}
 		};
 	});
 })();