@jdcfe/yep-react/lib/sticky/StickyContainer.js

一套移动端的React组件库

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

var _typeof = require("@babel/runtime/helpers/typeof");

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

var _extends2 = _interopRequireDefault(require("@babel/runtime/helpers/extends"));

var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));

var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));

var _assertThisInitialized2 = _interopRequireDefault(require("@babel/runtime/helpers/assertThisInitialized"));

var _inherits2 = _interopRequireDefault(require("@babel/runtime/helpers/inherits"));

var _possibleConstructorReturn2 = _interopRequireDefault(require("@babel/runtime/helpers/possibleConstructorReturn"));

var _getPrototypeOf2 = _interopRequireDefault(require("@babel/runtime/helpers/getPrototypeOf"));

var React = _interopRequireWildcard(require("react"));

var PropTypes = _interopRequireWildcard(require("prop-types"));

var _raf = _interopRequireDefault(require("raf"));

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = (0, _getPrototypeOf2.default)(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = (0, _getPrototypeOf2.default)(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return (0, _possibleConstructorReturn2.default)(this, result); }; }

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

var StickyContainer = /*#__PURE__*/function (_React$PureComponent) {
  (0, _inherits2.default)(StickyContainer, _React$PureComponent);

  var _super = _createSuper(StickyContainer);

  function StickyContainer(props) {
    var _this;

    (0, _classCallCheck2.default)(this, StickyContainer);
    _this = _super.call(this, props);
    _this.subscribers = [];
    _this.events = ['resize', 'scroll', 'touchstart', 'touchmove', 'touchend', 'pageshow', 'load'];
    _this.createRef = _this.createRef.bind((0, _assertThisInitialized2.default)(_this));
    _this.getParent = _this.getParent.bind((0, _assertThisInitialized2.default)(_this));
    _this.subscribe = _this.subscribe.bind((0, _assertThisInitialized2.default)(_this));
    _this.unsubscribe = _this.unsubscribe.bind((0, _assertThisInitialized2.default)(_this));
    _this.notifySubscribers = _this.notifySubscribers.bind((0, _assertThisInitialized2.default)(_this));
    return _this;
  }

  (0, _createClass2.default)(StickyContainer, [{
    key: "getChildContext",
    value: function getChildContext() {
      return {
        subscribe: this.subscribe,
        unsubscribe: this.unsubscribe,
        getParent: this.getParent
      };
    }
  }, {
    key: "subscribe",
    value: function subscribe(handler) {
      this.subscribers = this.subscribers.concat(handler);
    }
  }, {
    key: "unsubscribe",
    value: function unsubscribe(handler) {
      this.subscribers = this.subscribers.filter(function (current) {
        return current !== handler;
      });
    }
  }, {
    key: "notifySubscribers",
    value: function notifySubscribers(evt) {
      var _this2 = this;

      if (!this.framePending) {
        var currentTarget = evt.currentTarget;
        (0, _raf.default)(function () {
          _this2.framePending = false;

          var _this2$node$getBoundi = _this2.node.getBoundingClientRect(),
              top = _this2$node$getBoundi.top,
              bottom = _this2$node$getBoundi.bottom;

          _this2.subscribers.forEach(function (handler) {
            return handler({
              distanceFromTop: top,
              distanceFromBottom: bottom,
              eventSource: currentTarget === window ? document.body : _this2.node
            });
          });
        });
        this.framePending = true;
      }
    }
  }, {
    key: "createRef",
    value: function createRef(node) {
      this.node = node;
    }
  }, {
    key: "getParent",
    value: function getParent() {
      return this.node;
    }
  }, {
    key: "componentDidMount",
    value: function componentDidMount() {
      var _this3 = this;

      this.events.forEach(function (event) {
        return window.addEventListener(event, _this3.notifySubscribers);
      });
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      var _this4 = this;

      this.events.forEach(function (event) {
        return window.removeEventListener(event, _this4.notifySubscribers);
      });
    }
  }, {
    key: "render",
    value: function render() {
      return /*#__PURE__*/React.createElement("div", (0, _extends2.default)({}, this.props, {
        ref: this.createRef,
        onScroll: this.notifySubscribers,
        onTouchStart: this.notifySubscribers,
        onTouchMove: this.notifySubscribers,
        onTouchEnd: this.notifySubscribers
      }));
    }
  }]);
  return StickyContainer;
}(React.PureComponent);

exports.default = StickyContainer;
StickyContainer.defaultProps = {};
StickyContainer.childContextTypes = {
  subscribe: PropTypes.func,
  unsubscribe: PropTypes.func,
  getParent: PropTypes.func
};