Roll Observatory packages and add a roll script

charted/lib/svg/shapes/rect.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
-//
-
-part of charted.svg.shapes;
-
-/// Draw a rectangle at [x], [y] which is [width] pixels wide and
-/// [height] pixels height.  [topLeft], [topRight], [bottomRight] and
-/// [bottomLeft] are the corner radius at each of the four corners.
-String roundedRect(int x, int y, int width, int height,
-    int topLeft, int topRight, int bottomRight, int bottomLeft) =>
-        'M${x+topLeft},${y} '
-        'L${x+width-topRight},${y} '
-            'Q${x+width},${y} ${x+width},${y+topRight}'
-        'L${x+width},${y+height-bottomRight} '
-            'Q${x+width},${y+height} ${x+width-bottomRight},${y+height}'
-        'L${x+bottomLeft},${y+height} '
-            'Q${x},${y+height} ${x},${y+height-bottomLeft}'
-        'L${x},${y+topLeft} '
-            'Q${x},${y} ${x+topLeft},${y} Z';
-
-/// Draw a rectangle with rounded corners on both corners on the right.
-String rightRoundedRect(int x, int y, int width, int height, int radius) {
-  if (width < radius) radius = width;
-  if (height < radius * 2) radius = height ~/ 2;
-  return roundedRect(x, y, width, height, 0, radius, radius, 0);
-}
-
-/// Draw a rectangle with rounded corners on both corners on the top.
-String topRoundedRect(int x, int y, int width, int height, int radius) {
-  if (height < radius) radius = height;
-  if (width < radius * 2) radius = width ~/ 2;
-  return roundedRect(x, y, width, height, radius, radius, 0, 0);
-}
-
-/// Draw a rectangle with rounded corners on both corners on the right.
-String leftRoundedRect(int x, int y, int width, int height, int radius) {
-  if (width < radius) radius = width;
-  if (height < radius * 2) radius = height ~/ 2;
-  return roundedRect(x, y, width, height, radius, 0, 0, radius);
-}
-
-/// Draw a rectangle with rounded corners on both corners on the top.
-String bottomRoundedRect(int x, int y, int width, int height, int radius) {
-  if (height < radius) radius = height;
-  if (width < radius * 2) radius = width ~/ 2;
-  return roundedRect(x, y, width, height, 0, 0, radius, radius);
-}