/**
 * @license
 * Copyright 2019 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

/**
 * Utility methods for size calculation.
 * These methods are not specific to Blockly, and could be factored out into
 * a JavaScript framework such as Closure.
 *
 * @class
 */
// Former goog.module ID: Blockly.utils.Size

/**
 * Class for representing sizes consisting of a width and height.
 */
export class Size {
  /**
   * @param width Width.
   * @param height Height.
   */
  constructor(
    public width: number,
    public height: number,
  ) {}

  /**
   * Compares sizes for equality.
   *
   * @param a A Size.
   * @param b A Size.
   * @returns True iff the sizes have equal widths and equal heights, or if both
   *     are null.
   */
  static equals(a?: Size | null, b?: Size | null): boolean {
    if (a === b) {
      return true;
    }
    if (!a || !b) {
      return false;
    }
    return a.width === b.width && a.height === b.height;
  }

  /**
   * Returns a new size with the maximum width and height values out of both
   * sizes.
   */
  static max(a: Size, b: Size): Size {
    return new Size(Math.max(a.width, b.width), Math.max(a.height, b.height));
  }

  /**
   * Returns a new size with the minimum width and height values out of both
   * sizes.
   */
  static min(a: Size, b: Size): Size {
    return new Size(Math.min(a.width, b.width), Math.min(a.height, b.height));
  }
}