Move client/{base, observable, layout, touch, util, view} to samples/ui_lib .

client/base/Size.dart

-// Copyright (c) 2011, 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.
-
-/**
- * A utility class for representing two-dimensional sizes.
- */
-class Size {
-  num width;
-  num height;
-
-  Size(num this.width, num this.height) {
-  }
-
-  bool operator ==(Size other) {
-    return other !== null && width == other.width && height == other.height;
-  }
-
-  /**
-   * Returns the area of the size (width * height).
-   */
-  num area() {
-    return width * height;
-  }
-
-  /**
-   * Returns the ratio of the size's width to its height.
-   */
-  num aspectRatio() {
-    return width / height;
-  }
-
-  /**
-   * Clamps the width and height parameters upward to integer values.
-   * Returns this size with ceil'd components.
-   */
-  Size ceil() {
-    width = width.ceil();
-    height = height.ceil();
-    return this;
-  }
-
-  /**
-   * Returns a new copy of the Size.
-   */
-  Size clone() {
-    return new Size(width, height);
-  }
-
-  /**
-   * Returns true if this Size is the same size or smaller than the
-   * [target] size in both dimensions.
-   */
-  bool fitsInside(Size target) {
-    return width <= target.width && height <= target.height;
-  }
-
-  /**
-   * Clamps the width and height parameters downward to integer values.
-   * Returns this size with floored components.
-   */
-  Size floor() {
-    width = width.floor();
-    height = height.floor();
-    return this;
-  }
-
-  /**
-   * Returns the longer of the two dimensions in the size.
-   */
-  num getLongest() {
-    return Math.max(width, height);
-  }
-
-  /**
-   * Returns the shorter of the two dimensions in the size.
-   */
-  num getShortest() {
-    return Math.min(width, height);
-  }
-
-  /**
-   * Returns true if the size has zero area, false if both dimensions
-   *     are non-zero numbers.
-   */
-  bool isEmpty() {
-    return area() == 0;
-  }
-
-  /**
-   * Returns the perimeter of the size (width + height) * 2.
-   */
-  num perimeter() {
-    return (width + height) * 2;
-  }
-
-  /**
-   * Rounds the width and height parameters to integer values.
-   * Returns this size with rounded components.
-   */
-  Size round() {
-    width = width.round();
-    height = height.round();
-    return this;
-  }
-
-  /**
-   * Scales the size uniformly by a factor.
-   * [s] The scale factor.
-   * Returns this Size object after scaling.
-   */
-  Size scale(num s) {
-    width *= s;
-    height *= s;
-    return this;
-  }
-
-  /**
-   * Uniformly scales the size to fit inside the dimensions of a given size. The
-   * original aspect ratio will be preserved.
-   *
-   * This function assumes that both Sizes contain strictly positive dimensions.
-   * Returns this Size object, after optional scaling.
-   */
-  Size scaleToFit(Size target) {
-    num s = aspectRatio() > target.aspectRatio() ?
-        target.width / width : target.height / height;
-    return scale(s);
-  }
-
-  /**
-   * Returns a nice string representing size.
-   * Returns in the form (50 x 73).
-   */
-  String toString() {
-    return "(${width} x ${height})";
-  }
-}