var Path = require("../Path");

var dataUtil = require("../../core/utils/data_structure_util");

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

/**
 * @class qrenderer.graphic.shape.Ellipse 
 * 椭圆形状
 * @docauthor 大漠穷秋 <damoqiongqiu@126.com>
 */
var defaultConfig = {
  /**
   * @property {String} type
   */
  type: 'ellipse',
  shape: {
    cx: 0,
    cy: 0,
    rx: 0,
    ry: 0
  }
};

var Droplet =
/*#__PURE__*/
function (_Path) {
  _inherits(Droplet, _Path);

  /**
   * @method constructor Droplet
   * @param {Object} options 
   */
  function Droplet(options) {
    _classCallCheck(this, Droplet);

    return _possibleConstructorReturn(this, _getPrototypeOf(Droplet).call(this, dataUtil.merge(defaultConfig, options, true)));
  }
  /**
   * @method buildPath
   * 绘制元素路径
   * @param {Object} ctx 
   * @param {String} shape 
   */


  _createClass(Droplet, [{
    key: "buildPath",
    value: function buildPath(ctx, shape) {
      var k = 0.5522848;
      var x = shape.cx;
      var y = shape.cy;
      var a = shape.rx;
      var b = shape.ry;
      var ox = a * k; // 水平控制点偏移量

      var oy = b * k; // 垂直控制点偏移量
      // 从椭圆的左端点开始顺时针绘制四条三次贝塞尔曲线

      ctx.moveTo(x - a, y);
      ctx.bezierCurveTo(x - a, y - oy, x - ox, y - b, x, y - b);
      ctx.bezierCurveTo(x + ox, y - b, x + a, y - oy, x + a, y);
      ctx.bezierCurveTo(x + a, y + oy, x + ox, y + b, x, y + b);
      ctx.bezierCurveTo(x - ox, y + b, x - a, y + oy, x - a, y);
      ctx.closePath();
    }
  }]);

  return Droplet;
}(Path);

module.exports = Droplet;