react-qrcode-component/lib/index.js

react qrcode qr.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

var _react = _interopRequireDefault(require("react"));

var _propTypes = _interopRequireDefault(require("prop-types"));

var _QRCode = _interopRequireDefault(require("qr.js/lib/QRCode"));

var _ErrorCorrectLevel = _interopRequireDefault(require("qr.js/lib/ErrorCorrectLevel"));

var _utils = require("./utils");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

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 _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); }

function _createSuper(Derived) { return function () { var Super = _getPrototypeOf(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

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 _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }

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

var ReactQRCode = /*#__PURE__*/function (_React$PureComponent) {
  _inherits(ReactQRCode, _React$PureComponent);

  var _super = _createSuper(ReactQRCode);

  function ReactQRCode(props) {
    var _this;

    _classCallCheck(this, ReactQRCode);

    _this = _super.call(this, props);
    _this._canvas = _react["default"].createRef();
    return _this;
  }

  _createClass(ReactQRCode, [{
    key: "componentDidMount",
    value: function componentDidMount() {
      this.update();
    }
  }, {
    key: "update",
    value: function update() {
      var _this$props = this.props,
          value = _this$props.value,
          size = _this$props.size,
          level = _this$props.level,
          bgColor = _this$props.bgColor,
          fgColor = _this$props.fgColor,
          scale = _this$props.scale;
      var qrcode = new _QRCode["default"](-1, _ErrorCorrectLevel["default"][level]);
      qrcode.addData((0, _utils.convertStr)(value));
      qrcode.make();

      if (this._canvas != null) {
        var canvas = this._canvas;
        var ctx = canvas.getContext('2d');

        if (!ctx) {
          return;
        }

        var cells = qrcode.modules;

        if (cells === null) {
          return;
        }

        var tileW = size / cells.length;
        var tileH = size / cells.length;
        canvas.height = canvas.width = size * scale;
        ctx.scale(scale, scale);
        cells.forEach(function (row, rdx) {
          row.forEach(function (cell, cdx) {
            ctx && (ctx.fillStyle = cell ? fgColor : bgColor);
            var w = Math.ceil((cdx + 1) * tileW) - Math.floor(cdx * tileW);
            var h = Math.ceil((rdx + 1) * tileH) - Math.floor(rdx * tileH);
            ctx && ctx.fillRect(Math.round(cdx * tileW), Math.round(rdx * tileH), w, h);
          });
        });
      }
    }
  }, {
    key: "render",
    value: function render() {
      var _this2 = this;

      var _this$props2 = this.props,
          size = _this$props2.size,
          style = _this$props2.style;
      return /*#__PURE__*/_react["default"].createElement("canvas", {
        width: size,
        height: size,
        style: style,
        ref: function ref(_ref) {
          return _this2._canvas = _ref;
        }
      });
    }
  }]);

  return ReactQRCode;
}(_react["default"].PureComponent);

ReactQRCode.defaultProps = {
  value: '',
  // 需要转换的参数
  size: 128,
  // 二维码大小(宽，高)
  style: {},
  // canvas样式
  level: 'L',
  bgColor: 'white',
  fgColor: 'black',
  scale: window.devicePixelRatio || 1 // 比例

};
var _default = ReactQRCode;
exports["default"] = _default;