Adding Angular and dependent packages for testing

third_party/pkg/angular/lib/directive/input_select.dart

+part of angular.directive;
+
+typedef dynamic ItemEval(dynamic item, num index);
+
+/**
+ * HTML [SELECT] element with angular data-binding if used with [NgModelDirective].
+ *
+ * The [NgModelDirective] will receive the currently selected item. The binding is
+ * performed on the [OPTION].[value] property.
+ * An empty [OPTION].[value] is treated as null.
+ *
+ * If you the model contains value which does not map to any [OPTION] then a new
+ * unknown [OPTION] is inserted into the list. Once the model points to an existing
+ * [OPTION] the unknown [OPTION] is removed.
+ *
+ * Becouse [OPTION].[value] attribute is a string, the model is bound to a string.
+ * If there is need to bind to an object then [OptionValueDirective] should be used.
+ *
+ */
+@NgDirective(
+    selector: 'select[ng-model]',
+    visibility: NgDirective.CHILDREN_VISIBILITY
+)
+class InputSelectDirective implements NgAttachAware {
+  final Expando<OptionValueDirective> expando = new Expando<OptionValueDirective>();
+  final dom.SelectElement _selectElement;
+  final NodeAttrs _attrs;
+  final NgModel _model;
+  final Scope _scope;
+
+  final dom.OptionElement _unknownOption = new dom.OptionElement();
+  dom.OptionElement _nullOption;
+
+  _SelectMode _mode = new _SelectMode(null, null, null);
+  bool _dirty = false;
+
+  InputSelectDirective(dom.Element this._selectElement, this._attrs, this._model, this._scope) {
+    _unknownOption.value = '?';
+    _unknownOption.text = ''; // Explicit due to dartbug.com/14407
+    _selectElement.querySelectorAll('option').forEach((o) {
+      if (_nullOption == null && o.value == '') {
+        _nullOption = o;
+      }
+    });
+  }
+
+  attach() {
+    _attrs.observe('multiple', (value) {
+      _mode.destroy();
+      if (value == null) {
+        _model.watchCollection = false;
+        _mode = new _SingleSelectMode(expando, _selectElement, _model, _nullOption, _unknownOption);
+      } else {
+        _model.watchCollection = true;
+        _mode = new _MultipleSelectionMode(expando, _selectElement, _model);
+      }
+      _mode.onModelChange(_model.viewValue);
+    });
+
+    _selectElement.onChange.listen((event) => _mode.onViewChange(event));
+    _model.render = (value) => _mode.onModelChange(value);
+  }
+
+  /**
+   * This method invalidates the current state of the selector and forces a rerendering of the
+   * options using the [Scope.$evalAsync].
+   */
+  dirty() {
+    if (!_dirty) {
+      _dirty = true;
+      _scope.$evalAsync(() {
+        _dirty = false;
+        _mode.onModelChange(_model.viewValue);
+      });
+    }
+  }
+}
+
+/**
+ * Since the [value] attirbute of the [OPTION] can only be a string, Angular provides
+ * [ng-value] which allows binding to any expression.
+ *
+ */
+@NgDirective(
+    selector: 'option',
+    publishTypes: const [TextChangeListener],
+    map: const {'ng-value': '&ngValue'}
+)
+class OptionValueDirective implements TextChangeListener, NgAttachAware, NgDetachAware {
+  final InputSelectDirective _inputSelectDirective;
+  final NodeAttrs _attrs;
+
+  Getter _ngValue;
+
+  OptionValueDirective(this._attrs, this._inputSelectDirective) {
+    if (_inputSelectDirective != null) {
+      _inputSelectDirective.expando[_attrs.element] = this;
+    }
+  }
+
+  attach() {
+    if (_inputSelectDirective != null) {
+      this._attrs.observe('value', (_) => _inputSelectDirective.dirty());
+    }
+  }
+
+  call(String text) {
+    if (_inputSelectDirective != null) {
+      _inputSelectDirective.dirty();
+    }
+  }
+
+  detach() {
+    if (_inputSelectDirective != null) {
+      _inputSelectDirective.dirty();
+      _inputSelectDirective.expando[_attrs.element] = null;
+    }
+  }
+
+  set ngValue(Getter value) => _ngValue = value;
+  get ngValue =>
+    _attrs['ng-value'] is String ? _ngValue() : (_attrs.element as dom.OptionElement).value;
+}
+
+class _SelectMode {
+  final Expando<OptionValueDirective> expando;
+  final dom.SelectElement select;
+  final NgModel model;
+
+  _SelectMode(this.expando, this.select, this.model);
+
+  onViewChange(event) {}
+  onModelChange(value) {}
+  destroy() {}
+
+  get _options => select.querySelectorAll('option');
+  _forEachOption(fn, [quiteOnReturn = false]) {
+    for(var os = _options, i = 0, ii = os.length; i < ii; i++) {
+      var retValue = fn(os[i], i);
+      if (quiteOnReturn && retValue != null) {
+        return retValue;
+      }
+    }
+    return null;
+  }
+}
+
+class _SingleSelectMode extends _SelectMode {
+  final dom.OptionElement _unknownOption;
+  final dom.OptionElement _nullOption;
+
+  bool _unknownOptionActive = false;
+
+  _SingleSelectMode(Expando<OptionValueDirective> expando,
+                    dom.SelectElement select,
+                    NgModel model,
+                    this._nullOption,
+                    this._unknownOption
+                    ): super(expando, select, model) {
+  }
+
+  onViewChange(event) {
+    var i = 0;
+    model.viewValue = _forEachOption((option, _) {
+      if (option.selected) {
+        return option == _nullOption ? null : expando[option].ngValue;
+      }
+      if (option != _unknownOption && option != _nullOption) {
+        i++;
+      }
+    }, true);
+  }
+
+  onModelChange(value) {
+    var found = false;
+    _forEachOption((option, i) {
+      if (option == _unknownOption) return;
+      var selected = value == null ? option == _nullOption : expando[option].ngValue == value;
+      found = found || selected;
+      option.selected = selected;
+    });
+
+    if (!found) {
+      if (!_unknownOptionActive) {
+        select.insertBefore(_unknownOption, select.firstChild);
+        _unknownOption.selected = true;
+        _unknownOptionActive = true;
+      }
+    } else {
+      if (_unknownOptionActive) {
+        _unknownOption.remove();
+        _unknownOptionActive = false;
+      }
+    }
+  }
+}
+
+class _MultipleSelectionMode extends _SelectMode {
+  _MultipleSelectionMode(Expando<OptionValueDirective> expando,
+                         dom.SelectElement select,
+                         NgModel model
+                         ): super(expando, select, model);
+
+  onViewChange(event) {
+    var selected = [];
+    var fn = (o, i) => o.value;
+
+    _forEachOption((o, i) {
+      if (o.selected) {
+        selected.add(expando[o].ngValue);
+      }
+    });
+    model.viewValue = selected;
+  }
+
+  onModelChange(List selectedValues) {
+    num index = 0;
+    Function fn = (o, i) => o.selected = null;
+
+    if (selectedValues is List) {
+      fn = (o, i) => o.selected = selectedValues.contains(expando[o].ngValue);
+    }
+
+    _forEachOption(fn);
+  }
+}