<!doctype html>

<title>CodeMirror: Overlay Parser Demo</title>
<meta charset="utf-8"/>
<link href="../doc/docs.css" rel=stylesheet>

<link href="../lib/codemirror.css" rel="stylesheet">
<script src="../lib/codemirror.js"></script>
<script src="../addon/mode/overlay.js"></script>
<script src="../mode/xml/xml.js"></script>
<style>
  .CodeMirror {
    border: 1px solid black;
  }

  .cm-mustache {
    color: #0ca;
  }
</style>
<div id=nav>
  <a href="https://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../doc/logo.png"></a>

  <ul>
    <li><a href="../index.html">Home</a>
    <li><a href="../doc/manual.html">Manual</a>
    <li><a href="https://github.com/codemirror/codemirror">Code</a>
  </ul>
  <ul>
    <li><a class=active href="#">Overlay Parser</a>
  </ul>
</div>

<article>
  <h2>Overlay Parser Demo</h2>
  <form><textarea id="code" name="code">
<html>
  <body>
    <h1>{{title}}</h1>
    <p>These are links to {{things}}:</p>
    <ul>{{#links}}
      <li><a href="{{url}}">{{text}}</a></li>
      {{/links}}</ul>
  </body>
</html>
</textarea></form>

  <script>
    CodeMirror.defineMode("mustache", function (config, parserConfig) {
      var mustacheOverlay = {
        token: function (stream, state) {
          var ch;
          if (stream.match("{{")) {
            while ((ch = stream.next()) != null)
              if (ch == "}" && stream.next() == "}") {
                stream.eat("}");
                return "mustache";
              }
          }
          while (stream.next() != null && !stream.match("{{", false)) {
          }
          return null;
        }
      };
      return CodeMirror.overlayMode(CodeMirror.getMode(config, parserConfig.backdrop || "text/html"), mustacheOverlay);
    });
    var editor = CodeMirror.fromTextArea(document.getElementById("code"), {mode: "mustache"});
  </script>

  <p>Demonstration of a mode that parses HTML, highlighting
    the <a href="http://mustache.github.com/">Mustache</a> templating
    directives inside of it by using the code
    in <a href="../addon/mode/overlay.js"><code>overlay.js</code></a>. View
    source to see the 15 lines of code needed to accomplish this.</p>

</article>
