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client/dom/templates/html/impl/impl_Element.darttemplate

Index: client/dom/templates/html/impl/impl_Element.darttemplate
diff --git a/client/dom/templates/html/impl/impl_Element.darttemplate b/client/dom/templates/html/impl/impl_Element.darttemplate
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+// Copyright (c) 2012, 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.
+
+// TODO(jacobr): use _Lists.dart to remove some of the duplicated
+// functionality.
+class _ChildrenElementList implements ElementList {
+  // Raw Element.
+  final _ElementImpl _element;
+  final _HTMLCollectionImpl _childElements;
+
+  _ChildrenElementList._wrap(_ElementImpl element)
+    : _childElements = element._children,
+      _element = element;
+
+  List<Element> _toList() {
+    final output = new List(_childElements.length);
+    for (int i = 0, len = _childElements.length; i < len; i++) {
+      output[i] = _childElements[i];
+    }
+    return output;
+  }
+
+  _ElementImpl get first() {
+    return _element._firstElementChild;
+  }
+
+  void forEach(void f(Element element)) {
+    for (_ElementImpl element in _childElements) {
+      f(element);
+    }
+  }
+
+  ElementList filter(bool f(Element element)) {
+    final output = <Element>[];
+    forEach((Element element) {
+      if (f(element)) {
+        output.add(element);
+      }
+    });
+    return new _FrozenElementList._wrap(output);
+  }
+
+  bool every(bool f(Element element)) {
+    for(Element element in this) {
+      if (!f(element)) {
+        return false;
+      }
+    };
+    return true;
+  }
+
+  bool some(bool f(Element element)) {
+    for(Element element in this) {
+      if (f(element)) {
+        return true;
+      }
+    };
+    return false;
+  }
+
+  bool isEmpty() {
+    return _element._firstElementChild == null;
+  }
+
+  int get length() {
+    return _childElements.length;
+  }
+
+  _ElementImpl operator [](int index) {
+    return _childElements[index];
+  }
+
+  void operator []=(int index, _ElementImpl value) {
+    _element._replaceChild(value, _childElements[index]);
+  }
+
+   void set length(int newLength) {
+     // TODO(jacobr): remove children when length is reduced.
+     throw const UnsupportedOperationException('');
+   }
+
+  Element add(_ElementImpl value) {
+    _element._appendChild(value);
+    return value;
+  }
+
+  Element addLast(_ElementImpl value) => add(value);
+
+  Iterator<Element> iterator() => _toList().iterator();
+
+  void addAll(Collection<_ElementImpl> collection) {
+    for (_ElementImpl element in collection) {
+      _element._appendChild(element);
+    }
+  }
+
+  void sort(int compare(Element a, Element b)) {
+    throw const UnsupportedOperationException('TODO(jacobr): should we impl?');
+  }
+
+  void copyFrom(List<Object> src, int srcStart, int dstStart, int count) {
+    throw 'Not impl yet. todo(jacobr)';
+  }
+
+  void setRange(int start, int length, List from, [int startFrom = 0]) {
+    throw const NotImplementedException();
+  }
+
+  void removeRange(int start, int length) {
+    throw const NotImplementedException();
+  }
+
+  void insertRange(int start, int length, [initialValue = null]) {
+    throw const NotImplementedException();
+  }
+
+  List getRange(int start, int length) =>
+    new _FrozenElementList._wrap(_Lists.getRange(this, start, length,
+        <Element>[]));
+
+  int indexOf(Element element, [int start = 0]) {
+    return _Lists.indexOf(this, element, start, this.length);
+  }
+
+  int lastIndexOf(Element element, [int start = null]) {
+    if (start === null) start = length - 1;
+    return _Lists.lastIndexOf(this, element, start);
+  }
+
+  void clear() {
+    // It is unclear if we want to keep non element nodes?
+    _element.text = '';
+  }
+
+  Element removeLast() {
+    final last = this.last();
+    if (last != null) {
+      _element._removeChild(last);
+    }
+    return last;
+  }
+
+  Element last() {
+    return _element.lastElementChild;
+  }
+}
+
+// TODO(jacobr): this is an inefficient implementation but it is hard to see
+// a better option given that we cannot quite force NodeList to be an
+// ElementList as there are valid cases where a NodeList JavaScript object
+// contains Node objects that are not Elements.
+class _FrozenElementList implements ElementList {
+  final List<Node> _nodeList;
+
+  _FrozenElementList._wrap(this._nodeList);
+
+  Element get first() {
+    return _nodeList.first;
+  }
+
+  void forEach(void f(Element element)) {
+    for (Element el in this) {
+      f(el);
+    }
+  }
+
+  Collection map(f(Element element)) {
+    final out = [];
+    for (Element el in this) {
+      out.add(f(el));
+    }
+    return out;
+  }
+
+  ElementList filter(bool f(Element element)) {
+    final out = new _ElementList([]);
+    for (Element el in this) {
+      if (f(el)) out.add(el);
+    }
+    return out;
+  }
+
+  bool every(bool f(Element element)) {
+    for(Element element in this) {
+      if (!f(element)) {
+        return false;
+      }
+    };
+    return true;
+  }
+
+  bool some(bool f(Element element)) {
+    for(Element element in this) {
+      if (f(element)) {
+        return true;
+      }
+    };
+    return false;
+  }
+
+  bool isEmpty() => _nodeList.isEmpty();
+
+  int get length() => _nodeList.length;
+
+  Element operator [](int index) => _nodeList[index];
+
+  void operator []=(int index, Element value) {
+    throw const UnsupportedOperationException('');
+  }
+
+  void set length(int newLength) {
+    _nodeList.length = newLength;
+  }
+
+  void add(Element value) {
+    throw const UnsupportedOperationException('');
+  }
+
+  void addLast(Element value) {
+    throw const UnsupportedOperationException('');
+  }
+
+  Iterator<Element> iterator() => new _FrozenElementListIterator(this);
+
+  void addAll(Collection<Element> collection) {
+    throw const UnsupportedOperationException('');
+  }
+
+  void sort(int compare(Element a, Element b)) {
+    throw const UnsupportedOperationException('');
+  }
+
+  void setRange(int start, int length, List from, [int startFrom = 0]) {
+    throw const UnsupportedOperationException('');
+  }
+
+  void removeRange(int start, int length) {
+    throw const UnsupportedOperationException('');
+  }
+
+  void insertRange(int start, int length, [initialValue = null]) {
+    throw const UnsupportedOperationException('');
+  }
+
+  ElementList getRange(int start, int length) =>
+    new _FrozenElementList._wrap(_nodeList.getRange(start, length));
+
+  int indexOf(Element element, [int start = 0]) =>
+    _nodeList.indexOf(element, start);
+
+  int lastIndexOf(Element element, [int start = null]) =>
+    _nodeList.lastIndexOf(element, start);
+
+  void clear() {
+    throw const UnsupportedOperationException('');
+  }
+
+  Element removeLast() {
+    throw const UnsupportedOperationException('');
+  }
+
+  Element last() => _nodeList.last();
+}
+
+class _FrozenElementListIterator implements Iterator<Element> {
+  final _FrozenElementList _list;
+  int _index = 0;
+
+  _FrozenElementListIterator(this._list);
+
+  /**
+   * Gets the next element in the iteration. Throws a
+   * [NoMoreElementsException] if no element is left.
+   */
+  Element next() {
+    if (!hasNext()) {
+      throw const NoMoreElementsException();
+    }
+
+    return _list[_index++];
+  }
+
+  /**
+   * Returns whether the [Iterator] has elements left.
+   */
+  bool hasNext() => _index < _list.length;
+}
+
+class _ElementList extends _ListWrapper<Element> implements ElementList {
+  _ElementList(List<Element> list) : super(list);
+
+  ElementList filter(bool f(Element element)) =>
+    new _ElementList(super.filter(f));
+
+  ElementList getRange(int start, int length) =>
+    new _ElementList(super.getRange(start, length));
+}
+
+class ElementAttributeMap implements Map<String, String> {
+
+  final _ElementImpl _element;
+
+  ElementAttributeMap._wrap(this._element);
+
+  bool containsValue(String value) {
+    final attributes = _element._attributes;
+    for (int i = 0, len = attributes.length; i < len; i++) {
+      if(value == attributes[i].value) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  bool containsKey(String key) {
+    return _element._hasAttribute(key);
+  }
+
+  String operator [](String key) {
+    return _element._getAttribute(key);
+  }
+
+  void operator []=(String key, String value) {
+    _element._setAttribute(key, value);
+  }
+
+  String putIfAbsent(String key, String ifAbsent()) {
+    if (!containsKey(key)) {
+      this[key] = ifAbsent();
+    }
+  }
+
+  String remove(String key) {
+    _element._removeAttribute(key);
+  }
+
+  void clear() {
+    final attributes = _element._attributes;
+    for (int i = attributes.length - 1; i >= 0; i--) {
+      remove(attributes[i].name);
+    }
+  }
+
+  void forEach(void f(String key, String value)) {
+    final attributes = _element._attributes;
+    for (int i = 0, len = attributes.length; i < len; i++) {
+      final item = attributes[i];
+      f(item.name, item.value);
+    }
+  }
+
+  Collection<String> getKeys() {
+    // TODO(jacobr): generate a lazy collection instead.
+    final attributes = _element._attributes;
+    final keys = new List<String>(attributes.length);
+    for (int i = 0, len = attributes.length; i < len; i++) {
+      keys[i] = attributes[i].name;
+    }
+    return keys;
+  }
+
+  Collection<String> getValues() {
+    // TODO(jacobr): generate a lazy collection instead.
+    final attributes = _element._attributes;
+    final values = new List<String>(attributes.length);
+    for (int i = 0, len = attributes.length; i < len; i++) {
+      values[i] = attributes[i].value;
+    }
+    return values;
+  }
+
+  /**
+   * The number of {key, value} pairs in the map.
+   */
+  int get length() {
+    return _element._attributes.length;
+  }
+
+  /**
+   * Returns true if there is no {key, value} pair in the map.
+   */
+  bool isEmpty() {
+    return length == 0;
+  }
+}
+
+class _SimpleClientRect implements ClientRect {
+  final num left;
+  final num top;
+  final num width;
+  final num height;
+  num get right() => left + width;
+  num get bottom() => top + height;
+
+  const _SimpleClientRect(this.left, this.top, this.width, this.height);
+
+  bool operator ==(ClientRect other) {
+    return other !== null && left == other.left && top == other.top
+        && width == other.width && height == other.height;
+  }
+
+  String toString() => "($left, $top, $width, $height)";
+}
+
+// TODO(jacobr): we cannot currently be lazy about calculating the client
+// rects as we must perform all measurement queries at a safe point to avoid
+// triggering unneeded layouts.
+/**
+ * All your element measurement needs in one place
+ * @domName none
+ */
+class _ElementRectImpl implements ElementRect {
+  final ClientRect client;
+  final ClientRect offset;
+  final ClientRect scroll;
+
+  // TODO(jacobr): should we move these outside of ElementRect to avoid the
+  // overhead of computing them every time even though they are rarely used.
+  final _ClientRectImpl _boundingClientRect; 
+  final _ClientRectListImpl _clientRects;
+
+  _ElementRectImpl(_ElementImpl element) :
+    client = new _SimpleClientRect(element._clientLeft,
+                                  element._clientTop,
+                                  element._clientWidth, 
+                                  element._clientHeight), 
+    offset = new _SimpleClientRect(element._offsetLeft,
+                                  element._offsetTop,
+                                  element._offsetWidth,
+                                  element._offsetHeight),
+    scroll = new _SimpleClientRect(element._scrollLeft,
+                                  element._scrollTop,
+                                  element._scrollWidth,
+                                  element._scrollHeight),
+    _boundingClientRect = element._getBoundingClientRect(),
+    _clientRects = element._getClientRects();
+
+  _ClientRectImpl get bounding() => _boundingClientRect;
+
+  // TODO(jacobr): cleanup.
+  List<ClientRect> get clientRects() {
+    final out = new List(_clientRects.length);
+    for (num i = 0; i < _clientRects.length; i++) {
+      out[i] = _clientRects.item(i);
+    }
+    return out;
+  }
+}
+
+class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
+
+  // TODO(jacobr): caching these may hurt performance.
+  ElementAttributeMap _elementAttributeMap;
+  _CssClassSet _cssClassSet;
+  _DataAttributeMap _dataAttributes;
+
+  /**
+   * @domName Element.hasAttribute, Element.getAttribute, Element.setAttribute,
+   *   Element.removeAttribute
+   */
+  Map<String, String> get attributes() {
+    if (_elementAttributeMap === null) {
+      _elementAttributeMap = new ElementAttributeMap._wrap(this);
+    }
+    return _elementAttributeMap;
+  }
+
+  void set attributes(Map<String, String> value) {
+    Map<String, String> attributes = this.attributes;
+    attributes.clear();
+    for (String key in value.getKeys()) {
+      attributes[key] = value[key];
+    }
+  }
+
+  void set elements(Collection<Element> value) {
+    final elements = this.elements;
+    elements.clear();
+    elements.addAll(value);
+  }
+
+  ElementList get elements() => new _ChildrenElementList._wrap(this);
+
+  ElementList queryAll(String selectors) =>
+    new _FrozenElementList._wrap(_querySelectorAll(selectors));
+
+  Set<String> get classes() {
+    if (_cssClassSet === null) {
+      _cssClassSet = new _CssClassSet(this);
+    }
+    return _cssClassSet;
+  }
+
+  void set classes(Collection<String> value) {
+    _CssClassSet classSet = classes;
+    classSet.clear();
+    classSet.addAll(value);
+  }
+
+  Map<String, String> get dataAttributes() {
+    if (_dataAttributes === null) {
+      _dataAttributes = new _DataAttributeMap(attributes);
+    }
+    return _dataAttributes;
+  }
+
+  void set dataAttributes(Map<String, String> value) {
+    Map<String, String> dataAttributes = this.dataAttributes;
+    dataAttributes.clear();
+    for (String key in value.getKeys()) {
+      dataAttributes[key] = value[key];
+    }
+  }
+
+  Future<ElementRect> get rect() {
+    return _createMeasurementFuture(
+        () => new _ElementRectImpl(this),
+        new Completer<ElementRect>());
+  }
+
+  Future<CSSStyleDeclaration> get computedStyle() {
+     // TODO(jacobr): last param should be null, see b/5045788
+     return getComputedStyle('');
+  }
+
+  Future<CSSStyleDeclaration> getComputedStyle(String pseudoElement) {
+    return _createMeasurementFuture(() =>
+            window._getComputedStyle(this, pseudoElement),
+        new Completer<CSSStyleDeclaration>());
+  }
+$!MEMBERS
+}