rsuite/lib/Affix/Affix.js

A suite of react components

"use strict";

var _interopRequireWildcard = require("@babel/runtime/helpers/interopRequireWildcard");

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

exports.__esModule = true;
exports.default = void 0;

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

var _inheritsLoose2 = _interopRequireDefault(require("@babel/runtime/helpers/inheritsLoose"));

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

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

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

var _domLib = require("dom-lib");

var _elementResizeEvent = _interopRequireWildcard(require("element-resize-event"));

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

var Affix =
/*#__PURE__*/
function (_React$Component) {
  (0, _inheritsLoose2.default)(Affix, _React$Component);

  function Affix(props) {
    var _this;

    _this = _React$Component.call(this, props) || this;
    _this.containerRef = null;
    _this.scrollListener = null;

    _this.setContainerOffset = function () {
      _this.setState(function () {
        return {
          offset: (0, _domLib.getOffset)(_this.containerRef.current)
        };
      });
    };

    _this.updatePosition = function () {
      var offset = _this.state.offset;
      var _this$props = _this.props,
          top = _this$props.top,
          onChange = _this$props.onChange;
      var scrollY = window.scrollY || window.pageYOffset;
      var fixed = scrollY - (offset.top - top) >= 0;

      if (fixed !== _this.state.fixed) {
        _this.setState({
          fixed: fixed
        });

        onChange && onChange(fixed);
      }
    };

    _this.state = {
      offset: null,
      fixed: false
    };
    _this.containerRef = React.createRef();
    return _this;
  }

  var _proto = Affix.prototype;

  _proto.componentDidMount = function componentDidMount() {
    this.setContainerOffset();
    this.scrollListener = (0, _domLib.on)(window, 'scroll', this.updatePosition);
    (0, _elementResizeEvent.default)(this.containerRef.current, this.setContainerOffset);
  };

  _proto.componentWillUnmount = function componentWillUnmount() {
    if (this.scrollListener) {
      this.scrollListener.off();
    }

    if (this.containerRef.current) {
      (0, _elementResizeEvent.unbind)(this.containerRef.current);
    }
  };

  _proto.render = function render() {
    var _classNames;

    var _this$props2 = this.props,
        classPrefix = _this$props2.classPrefix,
        children = _this$props2.children,
        top = _this$props2.top,
        className = _this$props2.className,
        style = _this$props2.style;
    var _this$state = this.state,
        fixed = _this$state.fixed,
        offset = _this$state.offset;
    var classes = (0, _classnames.default)(className, (_classNames = {}, _classNames[classPrefix] = fixed, _classNames));
    var placeholderStyles = fixed ? {
      width: offset.width,
      height: offset.height
    } : undefined;
    var affixStyle = fixed ? (0, _extends2.default)({
      position: 'fixed',
      top: top,
      left: offset.left,
      width: offset.width,
      zIndex: 10
    }, style) : style;
    return React.createElement(React.Fragment, null, React.createElement("div", {
      className: classes,
      style: affixStyle,
      ref: this.containerRef
    }, children), fixed && React.createElement("div", {
      "aria-hidden": "true",
      style: placeholderStyles
    }));
  };

  return Affix;
}(React.Component);

Affix.propTypes = {
  top: _propTypes.default.number,
  onChange: _propTypes.default.func
};
Affix.defaultProps = {
  top: 0
};

var _default = (0, _utils.defaultProps)({
  classPrefix: 'affix'
})(Affix);

exports.default = _default;
module.exports = exports.default;