@txdfe/at/lib/affix/index.js

一个设计体系组件库

"use strict";

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

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

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

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

var _reactDom = require("react-dom");

var _classnames2 = _interopRequireDefault(require("classnames"));

var _util = require("../util");

var _configProvider = _interopRequireDefault(require("../config-provider"));

var _util2 = require("./util");

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

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }

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); Object.defineProperty(Constructor, "prototype", { writable: false }); 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 } }); Object.defineProperty(subClass, "prototype", { writable: false }); 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; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } 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 { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], 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 _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; }

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

  var _super = _createSuper(Affix);

  function Affix(props, context) {
    var _this;

    _classCallCheck(this, Affix);

    _this = _super.call(this, props, context);

    _defineProperty(_assertThisInitialized(_this), "updatePosition", function () {
      _this._updateNodePosition();
    });

    _defineProperty(_assertThisInitialized(_this), "_updateNodePosition", function () {
      var _this$props = _this.props,
          container = _this$props.container,
          useAbsolute = _this$props.useAbsolute;
      var affixContainer = container();

      if (!affixContainer) {
        return false;
      }

      var containerScrollTop = (0, _util2.getScroll)(affixContainer, true); // 容器在垂直位置上的滚动 offset

      var affixOffset = _this._getOffset(_this.affixNode, affixContainer); // 目标节点当前相对于容器的 offset


      var containerHeight = (0, _util2.getNodeHeight)(affixContainer); // 容器的高度

      var affixHeight = _this.affixNode.offsetHeight;
      var containerRect = (0, _util2.getRect)(affixContainer);
      var affixChildHeight = _this.affixChildNode.offsetHeight;

      var _assertThisInitialize = _assertThisInitialized(_this),
          affixMode = _assertThisInitialize.affixMode;

      var affixStyle = {
        width: affixOffset.width
      };
      var containerStyle = {
        width: affixOffset.width,
        height: affixChildHeight
      };

      if (affixMode.top && containerScrollTop > affixOffset.top - affixMode.offset) {
        // affix top
        if (useAbsolute) {
          affixStyle.position = 'absolute';
          affixStyle.top = containerScrollTop - (affixOffset.top - affixMode.offset);
          containerStyle.position = 'relative';
        } else {
          affixStyle.position = 'fixed';
          affixStyle.top = affixMode.offset + containerRect.top;
        }

        _this._setAffixStyle(affixStyle, true);

        _this._setContainerStyle(containerStyle);
      } else if (affixMode.bottom && containerScrollTop < affixOffset.top + affixHeight + affixMode.offset - containerHeight) {
        // affix bottom
        affixStyle.height = affixHeight;

        if (useAbsolute) {
          affixStyle.position = 'absolute';
          affixStyle.top = containerScrollTop - (affixOffset.top + affixHeight + affixMode.offset - containerHeight);
          containerStyle.position = 'relative';
        } else {
          affixStyle.position = 'fixed';
          affixStyle.bottom = affixMode.offset;
        }

        _this._setAffixStyle(affixStyle, true);

        _this._setContainerStyle(containerStyle);
      } else {
        _this._setAffixStyle(null);

        _this._setContainerStyle(null);
      }
    });

    _defineProperty(_assertThisInitialized(_this), "_affixNodeRefHandler", function (ref) {
      _this.affixNode = (0, _reactDom.findDOMNode)(ref);
    });

    _defineProperty(_assertThisInitialized(_this), "_affixChildNodeRefHandler", function (ref) {
      _this.affixChildNode = (0, _reactDom.findDOMNode)(ref);
    });

    _this.state = {
      style: null,
      containerStyle: null
    };
    _this.affixMode = _this._getAffixMode(props);
    return _this;
  }

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

      var container = this.props.container;

      this._updateNodePosition(); // wait for parent rendered


      this.timeout = setTimeout(function () {
        _this2._setEventHandlerForContainer(container);
      });
    }
  }, {
    key: "UNSAFE_componentWillReceiveProps",
    value: function UNSAFE_componentWillReceiveProps(nextProps) {
      if ('offsetTop' in nextProps || 'offsetBottom' in nextProps) {
        this.affixMode = this._getAffixMode(nextProps);

        this._updateNodePosition();
      }
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      if (this.timeout) {
        clearTimeout(this.timeout);
        this.timeout = null;
      }

      var container = this.props.container;

      this._removeEventHandlerForContainer(container);
    }
  }, {
    key: "_setEventHandlerForContainer",
    value: function _setEventHandlerForContainer(getContainer) {
      var container = getContainer();

      if (!container) {
        return;
      }

      _util.events.on(container, 'scroll', this._updateNodePosition, false);

      _util.events.on(container, 'resize', this._updateNodePosition, false);
    }
  }, {
    key: "_removeEventHandlerForContainer",
    value: function _removeEventHandlerForContainer(getContainer) {
      var container = getContainer();

      if (container) {
        _util.events.off(container, 'scroll', this._updateNodePosition);

        _util.events.off(container, 'resize', this._updateNodePosition);
      }
    }
  }, {
    key: "_getAffixMode",
    value: function _getAffixMode(nextProps) {
      var props = nextProps || this.props;
      var offsetTop = props.offsetTop,
          offsetBottom = props.offsetBottom;
      var affixMode = {
        top: false,
        bottom: false,
        offset: 0
      };

      if (typeof offsetTop !== 'number' && typeof offsetBottom !== 'number') {
        // set default
        affixMode.top = true;
      } else if (typeof offsetTop === 'number') {
        affixMode.top = true;
        affixMode.bottom = false;
        affixMode.offset = offsetTop;
      } else if (typeof offsetBottom === 'number') {
        affixMode.bottom = true;
        affixMode.top = false;
        affixMode.offset = offsetBottom;
      }

      return affixMode;
    }
  }, {
    key: "_setAffixStyle",
    value: function _setAffixStyle(affixStyle) {
      var affixed = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

      if (_util.obj.shallowEqual(affixStyle, this.state.style)) {
        return;
      }

      this.setState({
        style: affixStyle
      });
      var onAffix = this.props.onAffix;

      if (affixed) {
        onAffix(true);
      } else if (!affixStyle) {
        onAffix(false);
      }
    }
  }, {
    key: "_setContainerStyle",
    value: function _setContainerStyle(containerStyle) {
      if (_util.obj.shallowEqual(containerStyle, this.state.containerStyle)) {
        return;
      }

      this.setState({
        containerStyle: containerStyle
      });
    }
  }, {
    key: "_getOffset",
    value: function _getOffset(affixNode, affixContainer) {
      var affixRect = affixNode.getBoundingClientRect(); // affix 元素 相对浏览器窗口的位置

      var containerRect = (0, _util2.getRect)(affixContainer); // affix 容器 相对浏览器窗口的位置

      var containerScrollTop = (0, _util2.getScroll)(affixContainer, true);
      var containerScrollLeft = (0, _util2.getScroll)(affixContainer, false);
      return {
        top: affixRect.top - containerRect.top + containerScrollTop,
        left: affixRect.left - containerRect.left + containerScrollLeft,
        width: affixRect.width,
        height: affixRect.height
      };
    }
  }, {
    key: "render",
    value: function render() {
      var _classnames;

      var _this$props2 = this.props,
          prefix = _this$props2.prefix,
          className = _this$props2.className,
          style = _this$props2.style,
          children = _this$props2.children;
      var state = this.state;
      var classNames = (0, _classnames2["default"])((_classnames = {}, _defineProperty(_classnames, "".concat(prefix, "affix"), state.style), _defineProperty(_classnames, "".concat(prefix, "affix-top"), !state.style && this.affixMode.top), _defineProperty(_classnames, "".concat(prefix, "affix-bottom"), !state.style && this.affixMode.bottom), _defineProperty(_classnames, className, className), _classnames));

      var combinedStyle = _objectSpread(_objectSpread({}, state.containerStyle), style);

      return /*#__PURE__*/_react["default"].createElement("div", {
        ref: this._affixNodeRefHandler,
        style: combinedStyle
      }, /*#__PURE__*/_react["default"].createElement("div", {
        ref: this._affixChildNodeRefHandler,
        className: classNames,
        style: state.style
      }, children));
    }
  }]);

  return Affix;
}(_react["default"].Component);

_defineProperty(Affix, "propTypes", {
  prefix: _propTypes["default"].string,

  /**
   * 设置 Affix 需要监听滚动事件的容器元素
   * @return {ReactElement} 目标容器元素的实例
   */
  container: _propTypes["default"].func,

  /**
   * 距离窗口顶部达到指定偏移量后触发
   */
  offsetTop: _propTypes["default"].number,

  /**
   * 距离窗口底部达到制定偏移量后触发
   */
  offsetBottom: _propTypes["default"].number,

  /**
   * 当元素的样式发生固钉样式变化时触发的回调函数
   * @param {Boolean} 元素是否被固钉
   */
  onAffix: _propTypes["default"].func,

  /**
   * 是否启用绝对布局实现 affix
   * @param {Boolean} 是否启用绝对布局
   */
  useAbsolute: _propTypes["default"].bool,
  className: _propTypes["default"].string,
  style: _propTypes["default"].object,
  children: _propTypes["default"].any
});

_defineProperty(Affix, "defaultProps", {
  prefix: 'next-',
  container: function container() {
    return window;
  },
  onAffix: _util.func.noop
});

var _default = _configProvider["default"].config(Affix);

exports["default"] = _default;