gecko/browser/base/content/test/tabview/browser_tabview_startup_transitions.js

/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

var prefsBranch = Cc["@mozilla.org/preferences-service;1"].
                  getService(Ci.nsIPrefService).
                  getBranch("browser.panorama.");

function animateZoom() prefsBranch.getBoolPref("animate_zoom");

function registerCleanupFunction() {
  prefsBranch.setUserPref("animate_zoom", true);
}

function test() {
  waitForExplicitFinish();
  
  let charsetArg = "charset=" + window.content.document.characterSet;
  let win = window.openDialog(getBrowserURL(), "_blank", "chrome,all,dialog=no",
                              "about:blank", charsetArg, null, null, true);
  
  ok(animateZoom(), "By default, we animate on zoom.");
  prefsBranch.setBoolPref("animate_zoom", false);
  ok(!animateZoom(), "animate_zoom = false");
  
  let onLoad = function() {
    win.removeEventListener("load", onLoad, false);

    // a few shared references
    let tabViewWindow = null;
    let transitioned = 0;

    let onShown = function() {
      win.removeEventListener("tabviewshown", onShown, false);

      ok(!transitioned, "There should be no transitions");
      win.close();

      finish();
    };

    let initCallback = function() {
      tabViewWindow = win.TabView._window;
      function onTransitionEnd(event) {
        transitioned++;
        tabViewWindow.Utils.log(transitioned);
      }
      tabViewWindow.document.addEventListener("transitionend", onTransitionEnd, false);

      win.TabView.show();
    };

    win.addEventListener("tabviewshown", onShown, false);
    win.TabView._initFrame(initCallback);
  }
  win.addEventListener("load", onLoad, false);
}