Extensions Docs Server: use addEventListener with branch.js

chrome/common/extensions/docs/server2/static/js/branch.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-/**
- * Redirects to the same page on a different branch.
- *
- * @param {String} The path to redirect to.
- */
 (function() {
-  function redirectToBranch(value) {
-    if (!value)
+  function redirectToBranch() {
+    if (!this.value)

[not at google - send to devlin, 2012/07/27 03:30:39]

"this" is evil. This method gets called with the event as its argument; use
that, or hold onto 'branchChooser' and use it directly.

var branchChooser = document.gEBI('branchChooser');

function redirectToBranch() {
  ...
}

[cduvall, 2012/07/27 17:51:10]

Done.

       return;
-    var path = window.location.pathname.split('/')
-    window.location = value + '/' + path[path.length - 1];
+    var current_branch = window.bootstrap.branchInfo.current;
+    var path = window.location.pathname.split('/');
+    var index = path.indexOf(current_branch);
+    if (index != -1)
+      path[index] = this.value;

[not at google - send to devlin, 2012/07/27 03:30:39]

need to make sure that if value is empty the element is deleted, otherwise there
will be two // in the path.

[cduvall, 2012/07/27 17:51:10]

Value will never be empty, the branchChooser uses the full name of the default
branch (so 'stable' instead of ''). Also, the value is checked at line 7 if it
is empty.

+    else
+      path.splice(path.length - 1, 0, this.value);
+    window.location = path.join('/');
   }
 
-  window.redirectToBranch = redirectToBranch;
+  document.getElementById('branchChooser').addEventListener(
+      'change',
+      redirectToBranch,
+      true);

[not at google - send to devlin, 2012/07/27 03:30:39]

hm haven't seen "true" here before. Why do you need? Just curious.

[cduvall, 2012/07/27 17:51:10]

It was so I could use 'this' in the callback. Now I don't need it :)

 })()