Rename mdv -> template_binding, remove experiemntal apis from dart:html

pkg/mdv/lib/src/input_bindings.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 mdv;
-
-abstract class _InputBinding extends NodeBinding {
-  StreamSubscription _eventSub;
-
-  _InputBinding(node, name, model, path): super(node, name, model, path) {
-    _eventSub = _getStreamForInputType(node).listen(nodeValueChanged);
-  }
-
-  void boundValueChanged(newValue);
-
-  void nodeValueChanged(e);
-
-  void close() {
-    if (closed) return;
-    _eventSub.cancel();
-    super.close();
-  }
-
-  static EventStreamProvider<Event> _checkboxEventType = () {
-    // Attempt to feature-detect which event (change or click) is fired first
-    // for checkboxes.
-    var div = new DivElement();
-    var checkbox = div.append(new InputElement());
-    checkbox.type = 'checkbox';
-    var fired = [];
-    checkbox.onClick.listen((e) {
-      fired.add(Element.clickEvent);
-    });
-    checkbox.onChange.listen((e) {
-      fired.add(Element.changeEvent);
-    });
-    checkbox.dispatchEvent(new MouseEvent('click', view: window));
-    // WebKit/Blink don't fire the change event if the element is outside the
-    // document, so assume 'change' for that case.
-    return fired.length == 1 ? Element.changeEvent : fired.first;
-  }();
-
-  static Stream<Event> _getStreamForInputType(element) {
-    switch (element.type) {
-      case 'checkbox':
-        return _checkboxEventType.forTarget(element);
-      case 'radio':
-      case 'select-multiple':
-      case 'select-one':
-        return element.onChange;
-      default:
-        return element.onInput;
-    }
-  }
-}
-
-class _ValueBinding extends _InputBinding {
-  _ValueBinding(node, model, path) : super(node, 'value', model, path);
-
-  get node => super.node;
-
-  void boundValueChanged(newValue) {
-    // Note: node can be an InputElement or TextAreaElement. Both have "value".
-    (node as dynamic).value = sanitizeBoundValue(newValue);
-  }
-
-  void nodeValueChanged(e) {
-    value = (node as dynamic).value;
-  }
-}
-
-class _CheckedBinding extends _InputBinding {
-  _CheckedBinding(node, model, path) : super(node, 'checked', model, path);
-
-  InputElement get node => super.node;
-
-  void boundValueChanged(newValue) {
-    node.checked = _toBoolean(newValue);
-  }
-
-  void nodeValueChanged(e) {
-    value = node.checked;
-
-    // Only the radio button that is getting checked gets an event. We
-    // therefore find all the associated radio buttons and update their
-    // CheckedBinding manually.
-    if (node is InputElement && node.type == 'radio') {
-      for (var r in _getAssociatedRadioButtons(node)) {
-        var checkedBinding = r.bindings['checked'];
-        if (checkedBinding != null) {
-          // Set the value directly to avoid an infinite call stack.
-          checkedBinding.value = false;
-        }
-      }
-    }
-  }
-
-  // |element| is assumed to be an HTMLInputElement with |type| == 'radio'.
-  // Returns an array containing all radio buttons other than |element| that
-  // have the same |name|, either in the form that |element| belongs to or,
-  // if no form, in the document tree to which |element| belongs.
-  //
-  // This implementation is based upon the HTML spec definition of a
-  // "radio button group":
-  //   http://www.whatwg.org/specs/web-apps/current-work/multipage/number-state.html#radio-button-group
-  //
-  static Iterable _getAssociatedRadioButtons(element) {
-    if (!_isNodeInDocument(element)) return [];
-    if (element.form != null) {
-      return element.form.nodes.where((el) {
-        return el != element &&
-            el is InputElement &&
-            el.type == 'radio' &&
-            el.name == element.name;
-      });
-    } else {
-      var radios = element.ownerDocument.queryAll(
-          'input[type="radio"][name="${element.name}"]');
-      return radios.where((el) => el != element && el.form == null);
-    }
-  }
-
-  // TODO(jmesserly): polyfill document.contains API instead of doing it here
-  static bool _isNodeInDocument(Node node) {
-    // On non-IE this works:
-    // return node.ownerDocument.contains(node);
-    var document = node.document;
-    if (node == document || node.parentNode == document) return true;
-    return document.documentElement.contains(node);
-  }
-}
-
-class _SelectedIndexBinding extends _InputBinding {
-  _SelectedIndexBinding(node, model, path)
-      : super(node, 'selectedIndex', model, path);
-
-  SelectElement get node => super.node;
-
-  void boundValueChanged(value) {
-    var newValue = _toInt(value);
-    if (newValue <= node.length) {
-      node.selectedIndex = newValue;
-      return;
-    }
-
-    // The binding may wish to bind to an <option> which has not yet been
-    // produced by a child <template>. Furthermore, we may need to wait for
-    // <optgroup> iterating and then for <option>.
-    //
-    // Unlike the JavaScript MDV, we don't have a special "Object.observe" event
-    // loop to schedule on. (See the the "ensureScheduled" function:
-    // https://github.com/Polymer/mdv/commit/9a51ad7ed74a292bf71662cea28acbd151ff65c8)
-    //
-    // Instead we use scheduleMicrotask. Each <template repeat> needs a delay of
-    // 2:
-    //   * once to happen after the child _TemplateIterator is created
-    //   * once to be after _TemplateIterator.inputs CompoundBinding resolve
-    // And then we need to do this delay sequence twice:
-    //   * once for OPTGROUP
-    //   * once for OPTION.
-    // The resulting 2 * 2 is our maxRetries.
-    var maxRetries = 4;
-    delaySetSelectedIndex() {
-      if (newValue > node.length && --maxRetries >= 0) {
-        scheduleMicrotask(delaySetSelectedIndex);
-      } else {
-        node.selectedIndex = newValue;
-      }
-    }
-
-    scheduleMicrotask(delaySetSelectedIndex);
-  }
-
-  void nodeValueChanged(e) {
-    value = node.selectedIndex;
-  }
-
-  // TODO(jmesserly,sigmund): I wonder how many bindings typically convert from
-  // one type to another (e.g. value-as-number) and whether it is useful to
-  // have something like a int/num binding converter (either as a base class or
-  // a wrapper).
-  static int _toInt(value) {
-    if (value is String) return int.parse(value, onError: (_) => null);
-    return value is int ? value : null;
-  }
-}