Add a mode-changing demo

marijnh · marijnh · commit 86d826aaa294 · 2011-07-01T18:06:49.000+02:00
diff --git a/demo/changemode.html b/demo/changemode.html
@@ -0,0 +1,48 @@
+<!doctype html>
+<html>
+  <head>
+    <title>CodeMirror 2: Mode-Changing Demo</title>
+    <link rel="stylesheet" href="../lib/codemirror.css">
+    <script src="../lib/codemirror.js"></script>
+    <link rel="stylesheet" href="../theme/default.css">
+    <script src="../mode/javascript/javascript.js"></script>
+    <script src="../mode/scheme/scheme.js"></script>
+    <link rel="stylesheet" href="../css/docs.css">
+
+    <style type="text/css">
+      .CodeMirror {border: 1px solid black;}
+    </style>
+  </head>
+  <body>
+    <h1>CodeMirror 2: Mode-Changing demo</h1>
+
+    <form><textarea id="code" name="code">
+;; If there is Scheme code in here, the editor will be in Scheme mode.
+;; If you put in JS instead, it'll switch to JS mode.
+
+(define (double x)
+  (* x x))
+</textarea></form>
+
+<p>On changes to the content of the above editor, a (crude) script
+tries to auto-detect the language used, and switches the editor to
+either JavaScript or Scheme mode based on that.</p>
+
+<script>
+  var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
+    mode: "scheme",
+    lineNumbers: true,
+    matchBrackets: true,
+    tabMode: "indent",
+    onChange: function() {
+      clearTimeout(pending);
+      setTimeout(update, 400);
+    }
+  });
+  var pending;
+  function update() {
+    editor.setOption("mode", /^\s*[;\(]/.test(editor.getValue()) ? "scheme" : "javascript");
+  }
+</script>
+  </body>
+</html>
diff --git a/index.html b/index.html
@@ -67,6 +67,7 @@ <h2 style="margin-top: 0">Usage demos:</h2>
       <li><a href="demo/theme.html">Theming</a></li>
       <li><a href="demo/runmode.html">Stand-alone highlighting</a></li>
       <li><a href="demo/fullscreen.html">Full-screen editing</a></li>
+      <li><a href="demo/changemode.html">Mode auto-changing</a></li>
     </ul>
 
   </div></div>
