@fruits-chain/react-native-xiaoshu/lib/module/dropdown/dropdown-popup.js

🌈 React Native UI library

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); }

import React, { useCallback, useMemo, memo } from 'react';
import { TouchableWithoutFeedback, View, useWindowDimensions } from 'react-native';
import { useSafeAreaInsets } from 'react-native-safe-area-context';
import useState from '../hooks/useStateUpdate';
import Popup from '../popup/popup';
const POPUP_STYLE = {
  backgroundColor: 'transparent'
};

const DropdownPopup = _ref => {
  let {
    zIndex,
    closeOnPressOutside = true,
    targetHeight,
    targetPageY,
    onPressShade,
    safeAreaInset = true,
    children,
    ...restProps
  } = _ref;
  const insets = useSafeAreaInsets();
  const {
    height: windowHeight
  } = useWindowDimensions();
  const [wrapperStyle, setWrapperStyle] = useState({
    maxHeight: 0
  });
  /** 弹出层可以的最大高度 */

  const onLayoutPlace = useCallback(e => {
    setWrapperStyle({
      maxHeight: e.nativeEvent.layout.height
    });
  }, []);
  const [_isBottom, _shadeStyles, _boxStyles] = useMemo(() => {
    const topHeight = targetPageY - insets.top;
    const bottomHeight = windowHeight - targetPageY - targetHeight - insets.bottom;
    const isBottom = topHeight >= bottomHeight;
    const shadeStyles = {
      position: 'absolute',
      left: 0,
      right: 0,
      zIndex,
      // backgroundColor: '#f30', // to test ui
      // state.shadeStyle,
      ...(isBottom ? {
        top: targetPageY,
        bottom: 0
      } : {
        top: 0,
        height: targetPageY + targetHeight
      })
    };
    const boxStyles = {
      position: 'absolute',
      left: 0,
      right: 0,
      zIndex,
      overflow: 'hidden',
      // backgroundColor: '#000', // to test ui
      // state.ctxStyle,
      ...(isBottom ? {
        top: 0,
        height: targetPageY
      } : {
        top: targetPageY + targetHeight,
        bottom: 0
      })
    };
    return [isBottom, shadeStyles, boxStyles];
  }, [insets.bottom, insets.top, targetHeight, targetPageY, windowHeight, zIndex]);
  const placeholderJSX = /*#__PURE__*/React.createElement(TouchableWithoutFeedback, {
    onPress: closeOnPressOutside ? onPressShade : undefined
  }, /*#__PURE__*/React.createElement(View, {
    style: {
      height: _isBottom ? insets.top : insets.bottom
    }
  }));
  return /*#__PURE__*/React.createElement(React.Fragment, null, restProps.visible ? /*#__PURE__*/React.createElement(TouchableWithoutFeedback, {
    onPress: closeOnPressOutside ? onPressShade : undefined
  }, /*#__PURE__*/React.createElement(View, {
    style: _shadeStyles
  })) : null, /*#__PURE__*/React.createElement(View, {
    style: _boxStyles,
    pointerEvents: "box-none",
    onLayout: onLayoutPlace
  }, /*#__PURE__*/React.createElement(Popup, _extends({}, restProps, {
    style: POPUP_STYLE,
    position: _isBottom ? 'bottom' : 'top'
  }), /*#__PURE__*/React.createElement(View, {
    style: wrapperStyle
  }, _isBottom && safeAreaInset ? placeholderJSX : null, children, !_isBottom && safeAreaInset ? placeholderJSX : null))));
};

export default /*#__PURE__*/memo(DropdownPopup);
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