code.html

<html>
  <head>
    <link href="ace/style.css" rel="stylesheet" type="text/css">
    <title>Code editor</title>
  </head>

  <body>
    <div id="header">
      <div id="htext">
        Editing <b id='docname'>...</b>
        <a style="padding-left: 50px;" href="/code.html">New</a>
      </div>
        
    </div>

    <div id="editor">Loading...</div>
    <script src="/lib/ace/ace.js"></script>
    <script src="/lib/ace/mode-coffee.js"></script>
    <script src="/lib/ace/theme-idle_fingers.js"></script>
    <script src="/channel/bcsocket.js"></script>
    <script src="/share/share.uncompressed.js"></script>
    <script src="/share/ace.js"></script>
    <script>
var randomDocName = function(length) {
  var chars, x;
  if (length == null) {
    length = 10;
  }
  chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-=";
  var name = [];
  for (x = 0; x < length; x++) {
    name.push(chars[Math.floor(Math.random() * chars.length)]);
  }
  return name.join('');
};

window.onload = function() {
  var editor = ace.edit("editor");

  editor.setReadOnly(true);
  editor.getSession().setUseSoftTabs(true);
  editor.getSession().setTabSize(2);
  editor.getSession().setMode(new (require("ace/mode/coffee").Mode));
  editor.setTheme("ace/theme/idle_fingers");

  if (!document.location.hash) {
    document.location.hash = '#' + randomDocName();
  }
  var docName = "code:" + document.location.hash.slice(1);

  var span = document.getElementById('docname').innerText = docName;

  sharejs.open(docName, 'text', function(error, doc) {
    if (error) {
      console.error(error);
      return;
    }

    if (doc.created) {
      doc.insert(0, "# Coffeescript editor!\n\nexports.foo = ->\n  console.log 'hi!'");
    }

    doc.attach_ace(editor);
    editor.setReadOnly(false);
  });
};
    </script>
  </body>
</html>  