text: "use strict";
  
  function _typeof(obj) { 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); }
  
  var __importStar = void 0 && (void 0).__importStar || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) {
      if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
    }
    result["default"] = mod;
    return result;
  };
  
  var __importDefault = void 0 && (void 0).__importDefault || function (mod) {
    return mod && mod.__esModule ? mod : {
      "default": mod
    };
  };
  
  Object.defineProperty(exports, "__esModule", {
    value: true
  });
  
  var React = __importStar(require("react"));
  
  var findDOMNode_1 = __importDefault(require("rc-util/lib/Dom/findDOMNode"));
  
  var toArray_1 = __importDefault(require("rc-util/lib/Children/toArray"));
  
  var warning_1 = __importDefault(require("rc-util/lib/warning"));
  
  var ref_1 = require("rc-util/lib/ref");
  
  var resize_observer_polyfill_1 = __importDefault(require("resize-observer-polyfill"));
  
  var util_1 = require("./util");
  
  var INTERNAL_PREFIX_KEY = 'rc-observer-key'; // Still need to be compatible with React 15, we use class component here
  
  var ReactResizeObserver =
  /*#__PURE__*/
  function (_React$Component) {
    _inherits(ReactResizeObserver, _React$Component);
  
    function ReactResizeObserver() {
      var _this;
  
      _classCallCheck(this, ReactResizeObserver);
  
      _this = _possibleConstructorReturn(this, _getPrototypeOf(ReactResizeObserver).apply(this, arguments));
      _this.resizeObserver = null;
      _this.childNode = null;
      _this.currentElement = null;
      _this.state = {
        width: 0,
        height: 0
      };
  
      _this.onResize = function (entries) {
        var onResize = _this.props.onResize;
        var target = entries[0].target;
  
        var _target$getBoundingCl = target.getBoundingClientRect(),
            width = _target$getBoundingCl.width,
            height = _target$getBoundingCl.height;
        /**
         * Resize observer trigger when content size changed.
         * In most case we just care about element size,
         * let's use `boundary` instead of `contentRect` here to avoid shaking.
         */
  
  
        var fixedWidth = Math.floor(width);
        var fixedHeight = Math.floor(height);
  
        if (_this.state.width !== fixedWidth || _this.state.height !== fixedHeight) {
          var size = {
            width: fixedWidth,
            height: fixedHeight
          };
  
          _this.setState(size);
  
          if (onResize) {
            onResize(size);
          }
        }
      };
  
      _this.setChildNode = function (node) {
        _this.childNode = node;
      };
  
      return _this;
    }
  
    _createClass(ReactResizeObserver, [{
      key: "componentDidMount",
      value: function componentDidMount() {
        this.onComponentUpdated();
      }
    }, {
      key: "componentDidUpdate",
      value: function componentDidUpdate() {
        this.onComponentUpdated();
      }
    }, {
      key: "componentWillUnmount",
      value: function componentWillUnmount() {
        this.destroyObserver();
      }
    }, {
      key: "onComponentUpdated",
      value: function onComponentUpdated() {
        var disabled = this.props.disabled; // Unregister if disabled
  
        if (disabled) {
          this.destroyObserver();
          return;
        } // Unregister if element changed
  
  
        var element = findDOMNode_1.default(this.childNode || this);
        var elementChanged = element !== this.currentElement;
  
        if (elementChanged) {
          this.destroyObserver();
          this.currentElement = element;
        }
  
        if (!this.resizeObserver && element) {
          this.resizeObserver = new resize_observer_polyfill_1.default(this.onResize);
          this.resizeObserver.observe(element);
        }
      }
    }, {
      key: "destroyObserver",
      value: function destroyObserver() {
        if (this.resizeObserver) {
          this.resizeObserver.disconnect();
          this.resizeObserver = null;
        }
      }
    }, {
      key: "render",
      value: function render() {
        var children = this.props.children;
        var childNodes = toArray_1.default(children);
  
        if (childNodes.length > 1) {
          warning_1.default(false, 'Find more than one child node with `children` in ResizeObserver. Will only observe first one.');
        } else if (childNodes.length === 0) {
          warning_1.default(false, '`children` of ResizeObserver is empty. Nothing is in observe.');
          return null;
        }
  
        var childNode = childNodes[0];
  
        if (React.isValidElement(childNode) && util_1.supportRef(childNode)) {
          var ref = childNode.ref;
          childNodes[0] = React.cloneElement(childNode, {
            ref: ref_1.composeRef(ref, this.setChildNode)
          });
        }
  
        return childNodes.length === 1 ? childNodes[0] : childNodes.map(function (node, index) {
          if (!React.isValidElement(node) || 'key' in node && node.key !== null) {
            return node;
          }
  
          return React.cloneElement(node, {
            key: "".concat(INTERNAL_PREFIX_KEY, "-").concat(index)
          });
        });
      }
    }]);
  
    return ReactResizeObserver;
  }(React.Component);
  
  ReactResizeObserver.displayName = 'ResizeObserver';
  exports.default = ReactResizeObserver;