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DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=450191
-->
<head>
  <title>Test for Bug 450191</title>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body onload="run()">
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=450191">Mozilla Bug 450191</a>
<iframe id="display" src="about:blank"></iframe>
<pre id="test">
<script type="application/javascript">

/** Test for Bug 450191 **/

SimpleTest.waitForExplicitFinish();

function run() {
  var iframe = document.getElementById("display");
  var subdoc = iframe.contentDocument;
  var subwin = iframe.contentWindow;

  var doctext = "<div style='font-size: 2em'>div text <table><tr><td id='t'>table text</td></tr></table></div>";

  function subdoc_body_font() {
    return subwin.getComputedStyle(subdoc.body, "").fontSize;
  }

  function subdoc_cell_font() {
    return subwin.getComputedStyle(subdoc.getElementById("t"), "").fontSize;
  }

  subdoc.open();
  subdoc.write(doctext);
  subdoc.close();

  is(subdoc_cell_font(), subdoc_body_font(),
        "Quirks style sheet should be applied.");
  
  subdoc.open();
  subdoc.write("<!DOCTYPE HTML>" + doctext);
  subdoc.close();

  isnot(subdoc_cell_font(), subdoc_body_font(),
        "Quirks style sheet should NOT be applied.");
  
  subdoc.open();
  subdoc.write(doctext);
  subdoc.close();

  is(subdoc_cell_font(), subdoc_body_font(),
     "Quirks style sheet should be applied.");

  SimpleTest.finish();
}


</script>
</pre>
</body>
</html>