blockly/core/utils/size.ts

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

/**
 * @fileoverview Utility methods for size calculation.
 * These methods are not specific to Blockly, and could be factored out into
 * a JavaScript framework such as Closure.
 */
'use strict';

/**
 * 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
 */
goog.module('Blockly.utils.Size');


/**
 * Class for representing sizes consisting of a width and height.
 * @alias Blockly.utils.Size
 */
const Size = class {
  /**
   * @param {number} width Width.
   * @param {number} height Height.
   * @struct
   */
  constructor(width, height) {
    /**
     * Width
     * @type {number}
     */
    this.width = width;

    /**
     * Height
     * @type {number}
     */
    this.height = height;
  }

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

exports.Size = Size;