Roll Observatory packages and add a roll script

charted/lib/charts/layout_renderers/layout_base_renderer.dart

Index: charted/lib/charts/layout_renderers/layout_base_renderer.dart
diff --git a/charted/lib/charts/layout_renderers/layout_base_renderer.dart b/charted/lib/charts/layout_renderers/layout_base_renderer.dart
deleted file mode 100644
index 2ebac9c71367b2f6b26e06125091be619b5a1aea..0000000000000000000000000000000000000000
--- a/charted/lib/charts/layout_renderers/layout_base_renderer.dart
+++ /dev/null
@@ -1,147 +0,0 @@
-//
-// 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;
-
-abstract class LayoutRendererBase implements LayoutRenderer {
-  static const MAX_SUPPORTED_ROWS = 250;
-  final SubscriptionsDisposer _disposer = new SubscriptionsDisposer();
-
-  LayoutArea area;
-  ChartSeries series;
-  ChartTheme theme;
-  ChartState state;
-  Rect rect;
-
-  List<int> _valueStateCache;
-  List<Iterable<String>> _valueStylesCache;
-
-  Element host;
-  Selection root;
-  SelectionScope scope;
-
-  StreamController<ChartEvent> mouseOverController;
-  StreamController<ChartEvent> mouseOutController;
-  StreamController<ChartEvent> mouseClickController;
-
-  void _ensureAreaAndSeries(ChartArea area, ChartSeries series) {
-    assert(area != null && series != null);
-    assert(this.area == null || this.area == area);
-    if (this.area == null) {
-      if (area.state != null) {
-        this.state = area.state;
-        _disposer.add(this.state.changes.listen((changes) {
-          resetStylesCache();
-          handleStateChanges(changes);
-        }));
-      }
-    }
-    this.area = area;
-    this.series = series;
-  }
-
-  void _ensureReadyToDraw(Element element) {
-    assert(series != null && area != null);
-    assert(element != null && element is GElement);
-
-    if (scope == null) {
-      host = element;
-      scope = new SelectionScope.element(element);
-      root = scope.selectElements([host]);
-    }
-
-    theme = area.theme;
-    rect = area.layout.renderArea;
-    resetStylesCache();
-  }
-
-  void resetStylesCache() {
-    var length = math.min(area.data.rows.length, MAX_SUPPORTED_ROWS);
-    _valueStylesCache = new List(length);
-    _valueStateCache = new List(length);
-    _computeValueStates();
-  }
-
-  void handleStateChanges(List<ChangeRecord> changes);
-
-  @override
-  void dispose() {
-    if (root == null) return;
-    root.selectAll('.row-group').remove();
-  }
-
-  @override
-  Stream<ChartEvent> get onValueMouseOver {
-    if (mouseOverController == null) {
-      mouseOverController = new StreamController.broadcast(sync: true);
-    }
-    return mouseOverController.stream;
-  }
-
-  @override
-  Stream<ChartEvent> get onValueMouseOut {
-    if (mouseOutController == null) {
-      mouseOutController = new StreamController.broadcast(sync: true);
-    }
-    return mouseOutController.stream;
-  }
-
-  @override
-  Stream<ChartEvent> get onValueClick {
-    if (mouseClickController == null) {
-      mouseClickController = new StreamController.broadcast(sync: true);
-    }
-    return mouseClickController.stream;
-  }
-
-  void _computeValueStates() {
-    var length = math.min(area.data.rows.length, MAX_SUPPORTED_ROWS);
-    for (int i = 0, len = length; i < len; ++i) {
-      int flags = 0;
-      if (state != null) {
-        if (state.selection.isNotEmpty) {
-          flags |= (state.isSelected(i))
-              ? ChartState.VAL_HIGHLIGHTED
-              : ChartState.VAL_UNHIGHLIGHTED;
-        }
-        if (state.preview == i) {
-          flags |= ChartState.VAL_HOVERED;
-        }
-      }
-      _valueStateCache[i] = flags;
-    }
-  }
-
-  Iterable<String> stylesForValue(int row, { bool isTail: false }) {
-    if (isTail == true) return const[];
-    if (_valueStylesCache[row] == null) {
-      if (state == null) {
-        _valueStylesCache[row] = const[];
-      } else {
-        var styles = [],
-            flags = _valueStateCache[row];
-
-        if (flags & ChartState.VAL_HIGHLIGHTED != 0) {
-          styles.add(ChartState.VAL_HIGHLIGHTED_CLASS);
-        } else if (flags & ChartState.VAL_UNHIGHLIGHTED != 0) {
-          styles.add(ChartState.VAL_UNHIGHLIGHTED_CLASS);
-        }
-        if (flags & ChartState.VAL_HOVERED != 0) {
-          styles.add(ChartState.VAL_HOVERED_CLASS);
-        }
-
-        _valueStylesCache[row] = styles;
-      }
-    }
-    return _valueStylesCache[row];
-  }
-
-  String colorForValue(int row, {bool isTail: false}) => isTail
-      ? theme.getOtherColor()
-      : theme.getColorForKey(row, _valueStateCache[row]);
-}