acud/lib/back-top/index.js

acg 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 _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var React = _interopRequireWildcard(require("react"));
var _rcMotion = _interopRequireDefault(require("rc-motion"));
var _addEventListener = _interopRequireDefault(require("rc-util/lib/Dom/addEventListener"));
var _useMergedState3 = _interopRequireDefault(require("rc-util/lib/hooks/useMergedState"));
var _classnames = _interopRequireDefault(require("classnames"));
var _omit = _interopRequireDefault(require("rc-util/lib/omit"));
var _OutlinedUpVertical = _interopRequireDefault(require("acud-icon/lib/icons/OutlinedUpVertical"));
var _throttleByAnimationFrame = require("../_util/throttleByAnimationFrame");
var _configProvider = require("../config-provider");
var _getScroll = _interopRequireDefault(require("../_util/getScroll"));
var _scrollTo = _interopRequireDefault(require("../_util/scrollTo"));
var _reactNode = require("../_util/reactNode");
function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function _interopRequireWildcard(e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, "default": e }; if (null === e || "object" != _typeof(e) && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (var _t in e) "default" !== _t && {}.hasOwnProperty.call(e, _t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, _t)) && (i.get || i.set) ? o(f, _t, i) : f[_t] = e[_t]); return f; })(e, t); }
var BackTop = function BackTop(props) {
  var _useMergedState = (0, _useMergedState3["default"])(false, {
      value: props.visible
    }),
    _useMergedState2 = (0, _slicedToArray2["default"])(_useMergedState, 2),
    visible = _useMergedState2[0],
    setVisible = _useMergedState2[1];
  var ref = /*#__PURE__*/React.createRef();
  var scrollEvent = React.useRef();
  var getDefaultTarget = function getDefaultTarget() {
    return ref.current && ref.current.ownerDocument ? ref.current.ownerDocument : window;
  };
  var handleScroll = (0, _throttleByAnimationFrame.throttleByAnimationFrame)(function (e) {
    var visibilityHeight = props.visibilityHeight;
    var scrollTop = (0, _getScroll["default"])(e.target, true);
    setVisible(scrollTop > visibilityHeight);
  });
  var bindScrollEvent = function bindScrollEvent() {
    var target = props.target;
    var getTarget = target || getDefaultTarget;
    var container = getTarget();
    scrollEvent.current = (0, _addEventListener["default"])(container, 'scroll', function (e) {
      handleScroll(e);
    });
    handleScroll({
      target: container
    });
  };
  React.useEffect(function () {
    bindScrollEvent();
    return function () {
      if (scrollEvent.current) {
        scrollEvent.current.remove();
      }
      handleScroll.cancel();
    };
  }, [props.target]);
  var scrollToTop = function scrollToTop(e) {
    var onClick = props.onClick,
      target = props.target,
      _props$duration = props.duration,
      duration = _props$duration === void 0 ? 450 : _props$duration;
    (0, _scrollTo["default"])(0, {
      getContainer: target || getDefaultTarget,
      duration: duration
    });
    if (typeof onClick === 'function') {
      onClick(e);
    }
  };
  var renderChildren = function renderChildren(_ref) {
    var prefixCls = _ref.prefixCls;
    var children = props.children;
    var defaultElement = /*#__PURE__*/React.createElement("div", {
      className: "".concat(prefixCls, "-content")
    }, /*#__PURE__*/React.createElement("div", {
      className: "".concat(prefixCls, "-icon")
    }, /*#__PURE__*/React.createElement(_OutlinedUpVertical["default"], null)));
    return /*#__PURE__*/React.createElement(_rcMotion["default"], {
      visible: visible,
      motionName: "".concat(prefixCls, "-fade"),
      removeOnLeave: true
    }, function (_ref2) {
      var motionClassName = _ref2.className;
      var childNode = children || defaultElement;
      return /*#__PURE__*/React.createElement("div", null, (0, _reactNode.cloneElement)(childNode, function (_ref3) {
        var className = _ref3.className;
        return {
          className: (0, _classnames["default"])(motionClassName, className)
        };
      }));
    });
  };
  var _React$useContext = React.useContext(_configProvider.ConfigContext),
    getPrefixCls = _React$useContext.getPrefixCls,
    direction = _React$useContext.direction;
  var customizePrefixCls = props.prefixCls,
    _props$className = props.className,
    className = _props$className === void 0 ? '' : _props$className;
  var prefixCls = getPrefixCls('back-top', customizePrefixCls);
  var classString = (0, _classnames["default"])(prefixCls, className, (0, _defineProperty2["default"])({}, "".concat(prefixCls, "-rtl"), direction === 'rtl'));
  // fix https://fb.me/react-unknown-prop
  var divProps = (0, _omit["default"])(props, ['prefixCls', 'className', 'children', 'visibilityHeight', 'target', 'visible']);
  return /*#__PURE__*/React.createElement("div", (0, _extends2["default"])({}, divProps, {
    className: classString,
    onClick: scrollToTop,
    ref: ref
  }), renderChildren({
    prefixCls: prefixCls
  }));
};
BackTop.defaultProps = {
  visibilityHeight: 400
};
var _default = exports["default"] = /*#__PURE__*/React.memo(BackTop);