"Reverting 28184"

sdk/lib/math/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 dart.math;
-
-/**
- * A base class for representing two-dimensional axis-aligned rectangles.
- */
-abstract class RectangleBase<T extends num> {
-  const RectangleBase();
-
-  /**
-   * The x-coordinate of the left edge.
-   */
-  T get left;
-  /**
-   * The y-coordinate of the top edge.
-   */
-  T get top;
-  /** The `width` of the rectangle. */
-  T get width;
-  /** The `height` of the rectangle. */
-  T get height;
-
-  /**
-   * The number of units `right` of the origin where this rectangle's bottom
-   * right corner can be found.
-   */
-  T get right => left + width;
-  /**
-   * The number of units below the origin where this rectangle's bottom
-   * right corner can be found.
-   */
-  T get bottom => top + height;
-
-  String toString() {
-    return 'Rectangle ($left, $top) $width x $height';
-  }
-
-  bool operator ==(other) {
-    if (other is !Rectangle) 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` and [other].
-   *
-   * Returns null if there is no intersection.
-   */
-  Rectangle<T> intersection(Rectangle<T> other) {
-    var x0 = max(left, other.left);
-    var x1 = min(left + width, other.left + other.width);
-
-    if (x0 <= x1) {
-      var y0 = max(top, other.top);
-      var y1 = min(top + height, other.top + other.height);
-
-      if (y0 <= y1) {
-        return new Rectangle<T>(x0, y0, x1 - x0, y1 - y0);
-      }
-    }
-    return null;
-  }
-
-
-  /**
-   * Returns true if `this` intersects [other].
-   */
-  bool intersects(Rectangle 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` and [other].
-   */
-  Rectangle<T> union(Rectangle<T> other) {
-    var right = max(this.left + this.width, other.left + other.width);
-    var bottom = max(this.top + this.height, other.top + other.height);
-
-    var left = min(this.left, other.left);
-    var top = min(this.top, other.top);
-
-    return new Rectangle<T>(left, top, right - left, bottom - top);
-  }
-
-  /**
-   * Tests whether `this` entirely contains [another].
-   */
-  bool contains(Rectangle another) {
-    return left <= another.left &&
-           left + width >= another.left + another.width &&
-           top <= another.top &&
-           top + height >= another.top + another.height;
-  }
-
-  /**
-   * Tests whether `this` entirely contains a point.
-   */
-  bool containsPoint(Point another) {
-    return another.x >= left &&
-           another.x <= left + width &&
-           another.y >= top &&
-           another.y <= top + height;
-  }
-
-  Rectangle<int> ceil() => new Rectangle<int>(left.ceil(), top.ceil(),
-      width.ceil(), height.ceil());
-  Rectangle<int> floor() => new Rectangle<int>(left.floor(), top.floor(),
-      width.floor(), height.floor());
-  Rectangle<int> round() => new Rectangle<int>(left.round(), top.round(),
-      width.round(), height.round());
-
-  /**
-   * Truncates coordinates to integers and returns the result as a new
-   * rectangle.
-   */
-  Rectangle<int> truncate() => new Rectangle<int>(left.toInt(), top.toInt(),
-      width.toInt(), height.toInt());
-
-  Point<T> get topLeft => new Point<T>(this.left, this.top);
-  Point<T> get bottomRight => new Point<T>(this.left + this.width,
-      this.top + this.height);
-
-  static List<T> _calculateVerticesFromPoints(Point<T> a, Point<T> 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 [left, top, width, height];
-  }
-}
-
-
-/**
- * A class for representing two-dimensional rectangles whose properties are
- * immutable.
- */
-class Rectangle<T> extends RectangleBase<T> {
-  final T left;
-  final T top;
-  final T width;
-  final T height;
-
-  const Rectangle(this.left, this.top, this.width, this.height);
-
-  factory Rectangle.fromPoints(Point<T> a, Point<T> b) {
-    var list = RectangleBase._calculateVerticesFromPoints(a, b);
-    return new Rectangle<T>(list[0], list[1], list[2], list[3]);
-  }
-}