Move Rectangle and Point into dart:math.

tools/dom/src/Point.dart

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-part of html;
-
-/**
- * A utility class for representing two-dimensional positions.
- */
-class Point {
-  final num x;
-  final num y;
-
-  const Point([num x = 0, num y = 0]): x = x, y = y;
-
-  String toString() => '($x, $y)';
-
-  bool operator ==(other) {
-    if (other is !Point) return false;
-    return x == other.x && y == other.y;
-  }
-
-  int get hashCode => JenkinsSmiHash.hash2(x.hashCode, y.hashCode);
-
-  Point operator +(Point other) {
-    return new Point(x + other.x, y + other.y);
-  }
-
-  Point operator -(Point other) {
-    return new Point(x - other.x, y - other.y);
-  }
-
-  Point operator *(num factor) {
-    return new Point(x * factor, y * factor);
-  }
-
-  /**
-   * Get the straight line (Euclidean) distance between the origin (0, 0) and
-   * this point.
-   */
-  num get magnitude => sqrt(x * x + y * y);
-
-  /**
-   * Returns the distance between two points.
-   */
-  double distanceTo(Point other) {
-    var dx = x - other.x;
-    var dy = y - other.y;
-    return sqrt(dx * dx + dy * dy);
-  }
-
-  /**
-   * Returns the squared distance between two points.
-   *
-   * Squared distances can be used for comparisons when the actual value is not
-   * required.
-   */
-  num squaredDistanceTo(Point other) {
-    var dx = x - other.x;
-    var dy = y - other.y;
-    return dx * dx + dy * dy;
-  }
-
-  Point ceil() => new Point(x.ceil(), y.ceil());
-  Point floor() => new Point(x.floor(), y.floor());
-  Point round() => new Point(x.round(), y.round());
-
-  /**
-   * Truncates x and y to integers and returns the result as a new point.
-   */
-  Point toInt() => new Point(x.toInt(), y.toInt());
-}