tubestation/toolkit/content/tests/browser/head.js

"use strict";

Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");

XPCOMUtils.defineLazyModuleGetter(this, "Promise",
  "resource://gre/modules/Promise.jsm");

/**
 * A wrapper for the findbar's method "close", which is not synchronous
 * because of animation.
 */
function closeFindbarAndWait(findbar) {
  return new Promise((resolve) => {
    if (findbar.hidden) {
      resolve();
      return;
    }
    findbar.addEventListener("transitionend", function cont(aEvent) {
      if (aEvent.propertyName != "visibility") {
        return;
      }
      findbar.removeEventListener("transitionend", cont);
      resolve();
    });
    findbar.close();
  });
}

function pushPrefs(...aPrefs) {
  let deferred = Promise.defer();
  SpecialPowers.pushPrefEnv({"set": aPrefs}, deferred.resolve);
  return deferred.promise;
}