"Reverting 30387" -- failures on IE

samples/third_party/todomvc/web/editable_label.dart

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library todomvc.web.editable_label;
+
+import 'dart:html';
+import 'package:polymer/polymer.dart';
+
+/**
+ * Label whose [value] can be edited by double clicking. When editing, it
+ * displays a form and input element, otherwise it displays the label.
+ */
+// For illustration purposes this type uses Polymer.register instead of
+// CustomTag. We must mark it @reflectable to ensure its members
+// (the event handlers) are preserved and can be referenced from HTML.
+@reflectable
+class EditableLabel extends PolymerElement {
+  @observable bool editing = false;
+  @published String value = '';
+
+  factory EditableLabel() => new Element.tag('editable-label');
+
+  EditableLabel.created() : super.created();
+
+  bool get applyAuthorStyles => true;
+
+  ShadowRoot get _shadowRoot => getShadowRoot('editable-label');
+
+  InputElement get _editBox => _shadowRoot.querySelector('#edit');
+
+  void edit() {
+    editing = true;
+
+    // Wait for _editBox to be inserted.
+    onMutation(_shadowRoot).then((_) {
+      // For IE and Firefox: use .focus(), then reset the value to move the
+      // cursor to the end.
+      _editBox.focus();
+      _editBox.value = '';
+      _editBox.value = value;
+    });
+  }
+
+  void update(Event e) {
+    e.preventDefault(); // don't submit the form
+    if (!editing) return; // bail if user canceled
+    value = _editBox.value;
+    editing = false;
+  }
+
+  void maybeCancel(KeyboardEvent e) {
+    if (e.keyCode == KeyCode.ESC) {
+      editing = false;
+    }
+  }
+}
+
+@initMethod
+void _init() {
+  Polymer.register('editable-label', EditableLabel);
+}