Roll Observatory deps (charted -> ^0.3.0)

packages/charted/lib/core/text_metrics.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
 //
 
 /// Provides a way to measure rendered text width for clipping
 /// text on tooltips and ticks when they are too long.
@@ skipping 39 matching lines @@
       context.font = fontStyle;
       currentFontStyle = fontStyle;
     }
   }
 
   /// Measure width of [text] in pixels.
   /// Optionally, uses [fontStyle] instead of using the default style
   double getTextWidth(String text, {String fontStyle}) {
     assert(text.length <= MAX_STRING_LENGTH);
     setFontStyle(fontStyle);
-    return context.measureText(text).width;
+    return context.measureText(text).width.toDouble();
   }
 
   /// Gets length of the longest string in the given [strings].
   /// Optionally, uses [fontStyle] instead of using the default style.
   double getLongestTextWidth(Iterable<String> strings, {String fontStyle}) {
     setFontStyle(fontStyle);
-    double maxWidth = 0.0;
+    num maxWidth = 0.0;
     for (int i = 0; i < strings.length; ++i) {
       assert(strings.elementAt(i).length <= MAX_STRING_LENGTH);
-      double width = context.measureText(strings.elementAt(i)).width;
+      double width = context.measureText(strings.elementAt(i)).width.toDouble();
       if (width > maxWidth) {
         maxWidth = width;
       }
     }
 
     return maxWidth;
   }
 
   /// Truncates given [text] to fit in [width]. Adds an ellipsis to the
   /// returned string, if it needed to be truncated.
   /// Optionally, uses [fontStyle] instead of using the default style.
-  String ellipsizeText(String text, double width, {String fontStyle}) {
+  String ellipsizeText(String text, num width, {String fontStyle}) {
     assert(text.length <= MAX_STRING_LENGTH);
     setFontStyle(fontStyle);
-    double computedWidth = context.measureText(text).width;
+    double computedWidth = context.measureText(text).width.toDouble();
     if (computedWidth > width) {
       var indices = graphemeBreakIndices(text);
       var position = 0,
-          min = 0, max = indices.length - 1, mid,
+          min = 0,
+          max = indices.length - 1,
+          mid,
           ellipsis = context.measureText('…').width;
       width = width - ellipsis;
       while (max >= min) {
         mid = (min + max) ~/ 2;
         position = indices[mid];
         if (context.measureText(text.substring(0, position)).width > width) {
           max = mid - 1;
         } else {
           min = mid + 1;
         }
       }
       text = text.substring(0, indices[max]) + '…';
     }
     return text;
   }
 
   /// Truncates text in the given [element], which is either a [SvgTextElement]
   /// or a [SvgTspanElement] to fit in [width]. Appends an ellipsis to the text
   /// if it had to be truncated.
   /// Calling this method may force a layout on the document. For better
   /// performance, use [TextMetrics.ellipsizeText].
-  static ellipsizeTextElement() {
-  }
+  static ellipsizeTextElement() {}
 }