Move Rectangle and Point into dart:math.

tools/dom/src/Rectangle.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 base class for representing two-dimensional rectangles. This will hopefully
- * be moved merged with the dart:math Rect.
- */
-// TODO(efortuna): Merge with Math rect after finalizing with Florian.
-abstract class RectBase {
-  //  Not used, but keeps the VM from complaining about Rect having a const
-  // constructor and this one not.
-  const RectBase();
-
-  num get left;
-  num get top;
-  num get width;
-  num get height;
-
-  num get right => left + width;
-  num get bottom => top + height;
-
-  // NOTE! All code below should be common with Rect.
-
-  String toString() {
-    return '($left, $top, $width, $height)';
-  }
-
-  bool operator ==(other) {
-    if (other is !Rect) return false;
-    return left == other.left && top == other.top && width == other.width &&
-        height == other.height;
-  }
-
-  int get hashCode => JenkinsSmiHash.hash4(left.hashCode, top.hashCode,
-      width.hashCode, height.hashCode);
-
-  /**
-   * Computes the intersection of this rectangle and the rectangle parameter.
-   * Returns null if there is no intersection.
-   */
-  Rect intersection(Rect rect) {
-    var x0 = max(left, rect.left);
-    var x1 = min(left + width, rect.left + rect.width);
-
-    if (x0 <= x1) {
-      var y0 = max(top, rect.top);
-      var y1 = min(top + height, rect.top + rect.height);
-
-      if (y0 <= y1) {
-        return new Rect(x0, y0, x1 - x0, y1 - y0);
-      }
-    }
-    return null;
-  }
-
-
-  /**
-   * Returns whether a rectangle intersects this rectangle.
-   */
-  bool intersects(Rect other) {
-    return (left <= other.left + other.width && other.left <= left + width &&
-        top <= other.top + other.height && other.top <= top + height);
-  }
-
-  /**
-   * Returns a new rectangle which completely contains this rectangle and the
-   * input rectangle.
-   */
-  Rect union(Rect rect) {
-    var right = max(this.left + this.width, rect.left + rect.width);
-    var bottom = max(this.top + this.height, rect.top + rect.height);
-
-    var left = min(this.left, rect.left);
-    var top = min(this.top, rect.top);
-
-    return new Rect(left, top, right - left, bottom - top);
-  }
-
-  /**
-   * Tests whether this rectangle entirely contains another rectangle.
-   */
-  bool containsRect(Rect another) {
-    return left <= another.left &&
-           left + width >= another.left + another.width &&
-           top <= another.top &&
-           top + height >= another.top + another.height;
-  }
-
-  /**
-   * Tests whether this rectangle entirely contains a point.
-   */
-  bool containsPoint(Point another) {
-    return another.x >= left &&
-           another.x <= left + width &&
-           another.y >= top &&
-           another.y <= top + height;
-  }
-
-  Rect ceil() => new Rect(left.ceil(), top.ceil(), width.ceil(), height.ceil());
-  Rect floor() => new Rect(left.floor(), top.floor(), width.floor(),
-      height.floor());
-  Rect round() => new Rect(left.round(), top.round(), width.round(),
-      height.round());
-
-  /**
-   * Truncates coordinates to integers and returns the result as a new
-   * rectangle.
-   */
-  Rect toInt() => new Rect(left.toInt(), top.toInt(), width.toInt(),
-      height.toInt());
-
-  Point get topLeft => new Point(this.left, this.top);
-  Point get bottomRight => new Point(this.left + this.width,
-      this.top + this.height);
-}
-
-
-
-/**
- * A class for representing two-dimensional rectangles.
- *
- * This class is distinctive from RectBase in that it enforces that its
- * properties are immutable.
- */
-class Rect extends RectBase {
-  final num left;
-  final num top;
-  final num width;
-  final num height;
-
-  const Rect(this.left, this.top, this.width, this.height): super();
-
-  factory Rect.fromPoints(Point a, Point b) {
-    var left;
-    var width;
-    if (a.x < b.x) {
-      left = a.x;
-      width = b.x - left;
-    } else {
-      left = b.x;
-      width = a.x - left;
-    }
-    var top;
-    var height;
-    if (a.y < b.y) {
-      top = a.y;
-      height = b.y - top;
-    } else {
-      top = b.y;
-      height = a.y - top;
-    }
-
-    return new Rect(left, top, width, height);
-  }
-}