Yosemite JXA Javascript Function for clicking application sub-menu items

jxaClickAppSubMenuItem.applescript

// Click an OS X app sub-menu item
// 2nd argument is an array of arbitrary length (exact menu item labels, giving full path)

// e.g. menuItemClick("InqScribe", ['View', 'Aspect Ratio', 'Use Media Ratio'])

// Note that the menu path (spelling & sequence) must be exactly as in the app
// See menuItemTestClick() below for a slower version which reports any errors

// For OS X 10.10 Yosemite JXA JavaScript for Automation

function menuItemClick(strAppName, lstMenuPath) {
	var oApp = Application(strAppName),
		lngChain = lstMenuPath.length,
		blnResult = false;

	if (lngChain > 1) {

		var appSE = Application("System Events"),
			lstApps = appSE.processes.where({
				name: strAppName
			}),
			procApp = lstApps.length ? lstApps[0] : null;

		if (procApp) {
			oApp.activate();
			var strMenu = lstMenuPath[0],
				fnMenu = procApp.menuBars[0].menus.byName(strMenu),
				lngLast = lngChain - 1;

			for (var i = 1; i < lngLast; i++) {
				strMenu = lstMenuPath[i];
				fnMenu = fnMenu.menuItems[strMenu].menus[strMenu];
			}


			fnMenu.menuItems[
				lstMenuPath[lngLast]
			].click();
			blnResult = true;
		}
	}
	return blnResult;
}

// TESTING VERSION: REPORTS ANY ERRORS IN DETAIL OF MENU PATHS

// Click an OS X app sub-menu item
// 2nd argument is an array of arbitrary length (exact menu item labels, giving full path)
//menuItemClick("InqScribe", ['View', 'Aspect Ratio', 'Use Media Ratio'])
function menuItemTestClick(strAppName, lstMenuPath) {
	var oApp = Application(strAppName),
		lngChain = lstMenuPath.length,
		blnResult = false

	var blnDebug = false; // edit to 'true' if you want warnings of errors in the path
	// (NOTE this kind of checking slows the script, so edit to blnDebug=false for regular use)

	if (lngChain > 1) {

		var appSE = Application("System Events"),
			lstApps = appSE.processes.where({
				name: strAppName
			}),
			procApp = lstApps.length ? lstApps[0] : null;

		if (procApp) {
			var strMenu = lstMenuPath[0],
				strPath = strMenu,
				fnMenu = procApp.menuBars[0].menus.byName(strMenu),
				lngLast = lngChain - 1,
				mnuItem;

			if (blnDebug) {
				try {
					fnMenu.class()
				} catch (e) {
					throw "Menu Name " + '"' + strMenu + '"' + " not found in " + strAppName
				}
			}

			for (var i = 1; i < lngLast; i++) {
				strMenu = lstMenuPath[i];
				strPath = strPath + ' > ' + strMenu;
				fnMenu = fnMenu.menuItems[strMenu].menus[strMenu];
				if (blnDebug) {
					try {
						fnMenu.class()
					} catch (e) {
						throw "Menu item " + '"' + strPath + '"' + " not found in " + strAppName
					}
				}
			}

			strMenu = lstMenuPath[lngLast];
			strPath = strPath + ' > ' + strMenu;
			mnuItem = fnMenu.menuItems[strMenu];

			if (blnDebug) {
				try {
					mnuItem.class()
				} catch (e) {
					throw "Menu item " + '"' + strPath + '"' + " not found in " + strAppName
				}
			}

			oApp.activate()
			mnuItem.click();
			blnResult = true;

		}
	}
	return blnResult;
}