function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return 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) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { 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); }

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); }

var __decorate = this && this.__decorate || function (decorators, target, key, desc) {
  var c = arguments.length,
      r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc,
      d;
  if ((typeof Reflect === "undefined" ? "undefined" : _typeof(Reflect)) === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);else for (var i = decorators.length - 1; i >= 0; i--) {
    if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
  }
  return c > 3 && r && Object.defineProperty(target, key, r), r;
};

import * as React from 'react';
import { polyfill } from 'react-lifecycles-compat';
import classNames from 'classnames';
import omit from 'omit.js';
import { ConfigConsumer } from '../config-provider';
import { throttleByAnimationFrameDecorator } from '../_util/throttleByAnimationFrame';
import warning from '../_util/warning';
import { addObserveTarget, removeObserveTarget, getTargetRect } from './utils';

function getDefaultTarget() {
  return typeof window !== 'undefined' ? window : null;
}

var AffixStatus;

(function (AffixStatus) {
  AffixStatus[AffixStatus["None"] = 0] = "None";
  AffixStatus[AffixStatus["Prepare"] = 1] = "Prepare";
})(AffixStatus || (AffixStatus = {}));

var Affix = /*#__PURE__*/function (_React$Component) {
  _inherits(Affix, _React$Component);

  var _super = _createSuper(Affix);

  function Affix() {
    var _this;

    _classCallCheck(this, Affix);

    _this = _super.apply(this, arguments);
    _this.state = {
      status: AffixStatus.None,
      lastAffix: false
    };

    _this.savePlaceholderNode = function (node) {
      _this.placeholderNode = node;
    };

    _this.saveFixedNode = function (node) {
      _this.fixedNode = node;
    };

    _this.measure = function () {
      var _this$state = _this.state,
          status = _this$state.status,
          lastAffix = _this$state.lastAffix;
      var _this$props = _this.props,
          target = _this$props.target,
          offset = _this$props.offset,
          offsetBottom = _this$props.offsetBottom,
          onChange = _this$props.onChange;

      if (status !== AffixStatus.Prepare || !_this.fixedNode || !_this.placeholderNode || !target) {
        return;
      }

      var offsetTop = _this.props.offsetTop;

      if (typeof offsetTop === 'undefined') {
        offsetTop = offset;
        warning(typeof offset === 'undefined', 'Affix', '`offset` is deprecated. Please use `offsetTop` instead.');
      }

      if (offsetBottom === undefined && offsetTop === undefined) {
        offsetTop = 0;
      }

      var targetNode = target();

      if (!targetNode) {
        return;
      }

      var newState = {
        status: AffixStatus.None
      };
      var targetRect = getTargetRect(targetNode);
      var placeholderReact = getTargetRect(_this.placeholderNode);

      if (offsetTop !== undefined && targetRect.top > placeholderReact.top - offsetTop) {
        newState.affixStyle = {
          position: 'fixed',
          top: offsetTop + targetRect.top,
          width: placeholderReact.width,
          height: placeholderReact.height
        };
        newState.placeholderStyle = {
          width: placeholderReact.width,
          height: placeholderReact.height
        };
      } else if (offsetBottom !== undefined && targetRect.bottom < placeholderReact.bottom + offsetBottom) {
        var targetBottomOffset = targetNode === window ? 0 : window.innerHeight - targetRect.bottom;
        newState.affixStyle = {
          position: 'fixed',
          bottom: offsetBottom + targetBottomOffset,
          width: placeholderReact.width,
          height: placeholderReact.height
        };
        newState.placeholderStyle = {
          width: placeholderReact.width,
          height: placeholderReact.height
        };
      }

      newState.lastAffix = !!newState.affixStyle;

      if (onChange && lastAffix !== newState.lastAffix) {
        onChange(newState.lastAffix);
      }

      _this.setState(newState);
    }; // =================== Render ===================


    _this.renderAffix = function (_ref) {
      var getPrefixCls = _ref.getPrefixCls;
      var _this$state2 = _this.state,
          affixStyle = _this$state2.affixStyle,
          placeholderStyle = _this$state2.placeholderStyle,
          status = _this$state2.status;
      var _this$props2 = _this.props,
          prefixCls = _this$props2.prefixCls,
          style = _this$props2.style,
          children = _this$props2.children;
      var className = classNames(_defineProperty({}, getPrefixCls('affix', prefixCls), affixStyle));
      var props = omit(_this.props, ['prefixCls', 'offsetTop', 'offsetBottom', 'target', 'onChange']);

      var mergedPlaceholderStyle = _extends(_extends({}, status === AffixStatus.None ? placeholderStyle : null), style);

      return /*#__PURE__*/React.createElement("div", _extends({}, props, {
        style: mergedPlaceholderStyle,
        ref: _this.savePlaceholderNode
      }), /*#__PURE__*/React.createElement("div", {
        className: className,
        ref: _this.saveFixedNode,
        style: _this.state.affixStyle
      }, children));
    };

    return _this;
  } // Event handler


  _createClass(Affix, [{
    key: "componentDidMount",
    value: function componentDidMount() {
      var _this2 = this;

      var target = this.props.target;

      if (target) {
        // [Legacy] Wait for parent component ref has its value.
        // We should use target as directly element instead of function which makes element check hard.
        this.timeout = setTimeout(function () {
          addObserveTarget(target(), _this2); // Mock Event object.

          _this2.updatePosition({});
        });
      }
    }
  }, {
    key: "componentDidUpdate",
    value: function componentDidUpdate(prevProps) {
      var target = this.props.target;

      if (prevProps.target !== target) {
        removeObserveTarget(this);

        if (target) {
          addObserveTarget(target(), this); // Mock Event object.

          this.updatePosition({});
        }
      }

      if (prevProps.offsetTop !== this.props.offsetTop || prevProps.offsetBottom !== this.props.offsetBottom) {
        this.updatePosition({});
      }

      this.measure();
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      clearTimeout(this.timeout);
      removeObserveTarget(this);
      this.updatePosition.cancel();
    } // =================== Measure ===================
    // Handle realign logic
    // @ts-ignore TS6133

  }, {
    key: "updatePosition",
    value: function updatePosition(e) {
      // event param is used before. Keep compatible ts define here.
      this.setState({
        status: AffixStatus.Prepare,
        affixStyle: undefined,
        placeholderStyle: undefined
      });
    }
  }, {
    key: "render",
    value: function render() {
      return /*#__PURE__*/React.createElement(ConfigConsumer, null, this.renderAffix);
    }
  }]);

  return Affix;
}(React.Component);

Affix.defaultProps = {
  target: getDefaultTarget
};

__decorate([throttleByAnimationFrameDecorator()], Affix.prototype, "updatePosition", null);

polyfill(Affix);
export default Affix;