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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1256084
-->
<head>
  <meta charset="utf-8">
  <title>Test for Display Mode</title>
  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SpawnTask.js"></script>
  <link rel="stylesheet" type="text/css" href="chrome://global/skin"/>
  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
  <script type="application/javascript">

/** Test for Display Mode **/
SimpleTest.waitForExplicitFinish();
Components.utils.import("resource://gre/modules/Services.jsm");

function waitOneEvent(element, name) {
  return new Promise(function(resolve, reject) {
    element.addEventListener(name, function listener() {
      element.removeEventListener(name, listener);
      resolve();
    });
  });
}

add_task(function* () {
  yield waitOneEvent(window, "load");

  var iframe = document.getElementById("subdoc");
  var subdoc = iframe.contentDocument;
  var style = subdoc.getElementById("style");
  var bodyComputedStyled = subdoc.defaultView.getComputedStyle(subdoc.body, "");
  var win = Services.wm.getMostRecentWindow("navigator:browser");

  var secondDiv = subdoc.getElementById("b");
  var offsetTop = secondDiv.offsetTop;

  // Test entering the OS's fullscreen mode.
  var fullScreenEntered = waitOneEvent(win, "sizemodechange");
  synthesizeKey("VK_F11", {});
  yield fullScreenEntered;
  ok(offsetTop !== secondDiv.offsetTop, "offset top changes");
  var fullScreenExited = waitOneEvent(win, "sizemodechange");
  synthesizeKey("VK_F11", {});
  yield fullScreenExited;
  ok(offsetTop === secondDiv.offsetTop, "offset top returns to original value");

  offsetTop = secondDiv.offsetTop;
  // Test entering fullscreen through document requestFullScreen.
  fullScreenEntered = waitOneEvent(document, "mozfullscreenchange");
  document.body.mozRequestFullScreen();
  yield fullScreenEntered
  ok(offsetTop !== secondDiv.offsetTop, "offset top changes");
  fullScreenExited = waitOneEvent(document, "mozfullscreenchange");
  document.mozCancelFullScreen();
  yield fullScreenExited;
  ok(offsetTop === secondDiv.offsetTop, "offset top returns to original value");
});
  </script>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1256084">Mozilla Bug 1256084</a>
<iframe id="subdoc" src="http://mochi.test:8888/tests/layout/style/test/display_mode_reflow_iframe.html"></iframe>
<p id="display"></p>
<div id="content" style="display: none">

</div>
<pre id="test">
</pre>
</body>
</html>