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<!DOCTYPE HTML>
<!-- This Source Code Form is subject to the terms of the Mozilla Public
   - License, v. 2.0. If a copy of the MPL was not distributed with this
   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=502673
-->

<head>
  <title>Test for Bug 502673</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  <script src="/tests/SimpleTest/EventUtils.js"></script>
</head>

<body onload="doTest();">
  <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=502673">Mozilla Bug 502673</a>
  <p id="display"></p>
  <div id="content" style="display: none">
  </div>

  <pre id="test">
    <script type="application/javascript">

      /** Test for Bug 502673 **/

      SimpleTest.waitForExplicitFinish();

      function listener() {
      }

      listener.prototype =
      {
        NotifyDocumentWillBeDestroyed() {
          var editor = SpecialPowers.wrap(this.input).editor;
          editor.removeDocumentStateListener(this);
        },

        NotifyDocumentStateChanged(aNowDirty) {
          var editor = SpecialPowers.wrap(this.input).editor;
          editor.removeDocumentStateListener(this);
        },

        QueryInterface: SpecialPowers.wrapCallback(function(iid) {
          if (iid.equals(SpecialPowers.Ci.nsIDocumentStateListener) ||
              iid.equals(SpecialPowers.Ci.nsISupports))
            return this;
          throw SpecialPowers.Cr.NS_ERROR_NO_INTERFACE;
        }),
      };

      function doTest() {
        var input = document.getElementById("ip");

        // Add multiple listeners to the same editor
        var editor = SpecialPowers.wrap(input).editor;
        var listener1 = new listener();
        listener1.input = input;
        var listener2 = new listener();
        listener2.input = input;
        var listener3 = new listener();
        listener3.input = input;
        editor.addDocumentStateListener(listener1);
        editor.addDocumentStateListener(listener2);
        editor.addDocumentStateListener(listener3);

        // Test 1. Fire NotifyDocumentStateChanged notifications where the
        // listeners remove themselves
        input.value = "mozilla";
        editor.undo(1);

        // Report success if we get here - clearly we didn't crash
        ok(true, "Multiple listeners removed themselves after " +
                 "NotifyDocumentStateChanged notifications - didn't crash");

        // Add the listeners again for the next test
        editor.addDocumentStateListener(listener1);
        editor.addDocumentStateListener(listener2);
        editor.addDocumentStateListener(listener3);

        // Test 2. Fire NotifyDocumentWillBeDestroyed notifications where the
        // listeners remove themselves (though in the real world, listeners
        // shouldn't do this as nsEditor::PreDestroy removes them as
        // listeners anyway)
        document.body.removeChild(input);
        ok(true, "Multiple listeners removed themselves after " +
                 "NotifyDocumentWillBeDestroyed notifications - didn't crash");

       SimpleTest.finish();
      }
   </script>
  </pre>

  <input type="text" id="ip" />
</body>
</html>