Function executeActiveKeyBindings

hub/astray/keyboard.js:170–226

* Collects active keys, sets active binds and fires on key down callbacks * @param event

(event)

	 * @param event
	 */
	function executeActiveKeyBindings(event) {

		if(activeKeys < 1) {
			return true;
		}

		var bindingStack = queryActiveBindings(),
			spentKeys = [],
			output;

		//loop through each active binding
		for (var bindingIndex = 0; bindingIndex < bindingStack.length; bindingIndex += 1) {
			var binding = bindingStack[bindingIndex],
				usesSpentKey = false;

			//check each of the required keys. Make sure they have not been used by another binding
			for(var keyIndex = 0; keyIndex < binding.keys.length; keyIndex += 1) {
				var key = binding.keys[keyIndex];
				if(spentKeys.indexOf(key) > -1) {
					usesSpentKey = true;
					break;
				}
			}

			//if the binding does not use a key that has been spent then execute it
			if(!usesSpentKey) {

				//fire the callback
				if(typeof binding.callback === "function") {
					if(!binding.callback(event, binding.keys, binding.keyCombo)) {
						output = false
					}
				}

				//add the binding's combo to the active bindings array
				if(!activeBindings[binding.keyCombo]) {
					activeBindings[binding.keyCombo] = binding;
				}

				//add the current key binding's keys to the spent keys array
				for(var keyIndex = 0; keyIndex < binding.keys.length; keyIndex += 1) {
					var key = binding.keys[keyIndex];
					if(spentKeys.indexOf(key) < 0) {
						spentKeys.push(key);
					}
				}
			}
		}

		//if there are spent keys then we know a binding was fired
		// and that we need to tell jQuery to prevent event bubbling.
		if(spentKeys.length) {
			return false;
		}

		return output;
	}