//sollte eine live-liste aller fenster (derzeit eines) sein, implementiert mit __iterator__
const {browserWindows} = require('sdk/windows');

for (let  index          in          browserWindows ) console.log(index        ); // 0
for (let         window  of          browserWindows ) console.log(       window); //
for (let [index, window] in          browserWindows ) console.log(index, window); // undefined, undefined
for (let [index, window] in Iterator(browserWindows)) console.log(index, window); //

boolean a = createFoo();
boolean b = createBar();
boolean c = createFoobar();
boolean d = createBarfoo();

if (a || b || c || d)
{
	update();
}

boolean needsUpdate = false;
needsUpdate |= createFoo();
needsUpdate |= createBar();
needsUpdate |= createFoobar();
needsUpdate |= createBarfoo();

if (needsUpdate)
{
	update();
}

if (createFoo() | createBar() | createFoobar() | createBarfoo())
{
	update();
}

if (createFoo() || createBar() || createFoobar() || createBarfoo())
{
	update();
}

// checks whether or not we are allowed to show the overlay on a url
function checkOverlayAllowed(url) {
    "use strict";
    var is_chrome_page = url.indexOf("chrome://") === 0,
        is_facebook_login = url.indexOf("facebook.com/login") !== -1,
        is_google_login = url.indexOf("accounts.google.com/ServiceLogin") !== -1,
        is_twitter_login = url.indexOf("api.twitter.com/oauth/authorize") !== -1;

    return !is_chrome_page && !is_facebook_login && !is_google_login && !is_twitter_login;
}

// checks whether or not we are allowed to show the overlay on a url
function checkOverlayAllowed(url) {
    "use strict";

    return
        // not a chrome page
        url.indexOf("chrome://") === -1
        // not the facebook login page
        && url.indexOf("facebook.com/login") === -1
        // not the google login page
        && url.indexOf("accounts.google.com/ServiceLogin") === -1
        // not the twitter login page
        && url.indexOf("api.twitter.com/oauth/authorize") === -1;
}