port Node.bind to bd0a0591920da9091b326627a46a104a92c7efe7

pkg/polymer/lib/src/instance.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.
 
 part of polymer;
 
 /**
  * Use this annotation to publish a field as an attribute. For example:
  *
  *     class MyPlaybackElement extends PolymerElement {
@@ skipping 404 matching lines @@
    * Where polymerSyntax is a singleton `PolymerExpressions` instance from the
    * [polymer_expressions](https://pub.dartlang.org/packages/polymer_expressions)
    * package.
    *
    * You can override this method to change the instantiation behavior of the
    * template, for example to use a different data-binding syntax.
    */
   DocumentFragment instanceTemplate(Element template) =>
       templateBind(template).createInstance(this, _polymerSyntax);
 
-  NodeBinding createBinding(String name, model, String path) =>
-      nodeBindFallback(this).createBinding(name, model, path);
-
-  NodeBinding bind(String name, model, String path) {
+  NodeBinding bind(String name, model, [String path]) {
     // note: binding is a prepare signal. This allows us to be sure that any
     // property changes that occur as a result of binding will be observed.
     if (!_elementPrepared) prepareElement();
 
     var property = propertyForAttribute(name);
     if (property != null) {
       unbind(name);
       // use n-way Polymer binding
       var observer = bindProperty(property.simpleName, model, path);
       // reflect bound property to attribute when binding
@@ skipping 190 matching lines @@
    *
    *     var myProperty;
    *
    *     created() {
    *       super.created();
    *       bindProperty(#myProperty, this, 'myModel.path.to.otherProp');
    *     }
    */
   // TODO(jmesserly): replace with something more localized, like:
   // @ComputedField('myModel.path.to.otherProp');
-  NodeBinding bindProperty(Symbol name, Object model, String path) =>
+  NodeBinding bindProperty(Symbol name, Object model, [String path]) =>
       // apply Polymer two-way reference binding
       _bindProperties(this, name, model, path);
 
   /**
    * bind a property in A to a path in B by converting A[property] to a
    * getter/setter pair that accesses B[...path...]
    */
   static NodeBinding _bindProperties(Polymer inA, Symbol inProperty,
         Object inB, String inPath) {
 
@@ skipping 414 matching lines @@
 
     _sub = node.changes.listen(_propertyValueChanged);
   }
 
   void close() {
     if (closed) return;
     _sub.cancel();
     super.close();
   }
 
-  void boundValueChanged(newValue) {
+  void valueChanged(newValue) {
     _lastValue = newValue;
     _target.setField(_property, newValue);
   }
 
   void _propertyValueChanged(List<ChangeRecord> records) {
     for (var record in records) {
       if (record is PropertyChangeRecord && record.name == _property) {
         final newValue = _target.getField(_property).reflectee;
         if (!identical(_lastValue, newValue)) {
           value = newValue;
@@ skipping 53 matching lines @@
 class PolymerElement extends HtmlElement with Polymer, Observable {
   PolymerElement.created() : super.created() {
     polymerCreated();
   }
 }
 
 class _PropertyValue {
   Object oldValue, newValue;
   _PropertyValue(this.oldValue);
 }