Source: gfx/core/math/shapes/Rectangle.js

const CONST = require('../../../const');

/**
 * the Rectangle object is an area defined by its position, as indicated by its top-left corner point (x, y) and by its width and its height.
 *
 * @class
 */
class Rectangle {
  /**
   * @constructor
   * @param {number} x      The X coordinate of the upper-left corner of the rectangle
   * @param {number} y      The Y coordinate of the upper-left corner of the rectangle
   * @param {number} width  The overall width of this rectangle
   * @param {number} height The overall height of this rectangle
   */
  constructor(x, y, width, height) {
    /**
     * @member {number}
     * @default 0
     */
    this.x = x || 0;

    /**
     * @member {number}
     * @default 0
     */
    this.y = y || 0;

    /**
     * @member {number}
     * @default 0
     */
    this.width = width || 0;

    /**
     * @member {number}
     * @default 0
     */
    this.height = height || 0;

    /**
     * The type of the object, mainly used to avoid `instanceof` checks
     *
     * @member {number}
     */
    this.type = CONST.SHAPES.RECT;
  }

  /**
   * Creates a clone of this Rectangle
   *
   * @return {Rectangle} a copy of the rectangle
   */
  clone() {
    return new Rectangle(this.x, this.y, this.width, this.height);
  }

  /**
   * Checks whether the x and y coordinates given are contained within this Rectangle
   *
   * @param {number} x The X coordinate of the point to test
   * @param {number} y The Y coordinate of the point to test
   * @return {boolean} Whether the x/y coordinates are within this Rectangle
   */
  contains(x, y) {
    if (this.width <= 0 || this.height <= 0) {
      return false;
    }

    if (x >= this.x && x < this.x + this.width) {
      if (y >= this.y && y < this.y + this.height) {
        return true;
      }
    }

    return false;
  }
}

/**
 * A constant empty rectangle.
 *
 * @static
 * @constant
 */
Rectangle.EMPTY = new Rectangle(0, 0, 0, 0);

module.exports = Rectangle;