Roll Observatory deps (charted -> ^0.3.0)

packages/charted/lib/charts/data_transformers/filter_transformer.dart

-/*
- * Copyright 2014 Google Inc. All rights reserved.
- *
- * Use of this source code is governed by a BSD-style
- * license that can be found in the LICENSE file or at
- * https://developers.google.com/open-source/licenses/bsd
- */
+//
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+//
 
 part of charted.charts;
 
 typedef bool FilterFunction(dynamic value);
 
-/**
- * Transforms the ChartData base on the specified FilterDefinitions.  Each row
- * of data will be tested by passing the value at target column to the filter
- * function.  If filter function returns false, the row will be filtered out.
- * This transformer does not modify the column part of the input ChartData.
- */
+/// Transforms the ChartData base on the specified FilterDefinitions.  Each row
+/// of data will be tested by passing the value at target column to the filter
+/// function.  If filter function returns false, the row will be filtered out.
+/// This transformer does not modify the column part of the input ChartData.
 class FilterTransformer extends ChangeNotifier
     implements ChartDataTransform, ChartData {
   final SubscriptionsDisposer _dataSubscriptions = new SubscriptionsDisposer();
   Iterable<ChartColumnSpec> columns;
   ObservableList<Iterable> rows = new ObservableList();
   List<FilterDefinition> filterFunctions;
   ChartData _data;
 
   FilterTransformer(this.filterFunctions);
 
-  /**
-   * Transforms the input data with the list of [FilterDefinition] specified in
-   * the constructor.  If the rows and columns are ObservableList in the data,
-   * changes in rows and columns in input data will trigger transform to be
-   * performed again to update the output rows and columns.
-   */
+  /// Transforms the input data with the list of [FilterDefinition] specified in
+  /// the constructor.  If the rows and columns are ObservableList in the data,
+  /// changes in rows and columns in input data will trigger transform to be
+  /// performed again to update the output rows and columns.
   ChartData transform(ChartData data) {
     _data = data;
     _registerListeners();
     _transform();
     return this;
   }
 
-  /** Registers listeners if data.rows or data.columns are Observable. */
+  /// Registers listeners if data.rows or data.columns are Observable.
   _registerListeners() {
     _dataSubscriptions.dispose();
 
-    if(_data is Observable) {
+    if (_data is Observable) {
       var observable = (_data as Observable);
       _dataSubscriptions.add(observable.changes.listen((records) {
         _transform();
 
         // NOTE: Currently we're only passing the first change because the chart
         // area just draw with the updated data.  When we add partial update
         // to chart area, we'll need to handle this better.
         notifyChange(records.first);
       }));
     }
   }
 
-  /**
-   * Performs the filter transform with _data.  This is called on transform and
-   * onChange if the input ChartData is Observable.
-   */
+  /// Performs the filter transform with _data.  This is called on transform and
+  /// onChange if the input ChartData is Observable.
   _transform() {
     columns = _data.columns;
     rows.clear();
 
     for (var row in _data.rows) {
       // Add the row if each value in target column passes the filter function.
-      if (filterFunctions.every((e) =>
-          e.filterFunc(row.elementAt(e.targetColumn)))) {
+      if (filterFunctions
+          .every((e) => e.filterFunc(row.elementAt(e.targetColumn)))) {
         rows.add(row);
       }
     }
   }
 }
 
 class FilterDefinition {
   final FilterFunction filterFunc;
   final int targetColumn;
   FilterDefinition(this.targetColumn, this.filterFunc);
 }