@fruits-chain/react-native-xiaoshu/lib/module/dropdown/item.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, memo } from 'react';
import { TouchableWithoutFeedback, View, ScrollView, useWindowDimensions } from 'react-native';
import { useSafeAreaInsets } from 'react-native-safe-area-context';
import Portal from '../portal';
import Popup from '../popup/popup';
import Cell from '../cell';
import IconSuccessOutline from '../icon/success';
import useState from '../hooks/useStateUpdate';
import { useUpdateEffect } from '../hooks';
import { getDefaultValue } from '../helpers';
import { useDropdownConfig } from './context';
import DropdownText from './text';
const POPUP_STYLE = {
  backgroundColor: 'transparent'
};

const DropdownItem = _ref => {
  let {
    titleStyle,
    titleTextStyle,
    lazyRender,
    options = [],
    value,
    defaultValue,
    onChange,
    duration,
    zIndex,
    closeOnPressOutside,
    ...restProps
  } = _ref;
  const insets = useSafeAreaInsets();
  const {
    height: windowHeight
  } = useWindowDimensions();
  const config = useDropdownConfig();
  const [state, setState] = useState({
    active: false,
    ctxMaxHeight: 0,
    // eslint-disable-next-line @typescript-eslint/consistent-type-assertions
    ctxStyle: {},
    // eslint-disable-next-line @typescript-eslint/consistent-type-assertions
    shadeStyle: {},
    position: 'bottom',
    value: getDefaultValue(value, defaultValue)
  }); // 修正数据

  lazyRender = getDefaultValue(lazyRender, config.lazyRender);
  duration = getDefaultValue(duration, config.duration);
  zIndex = getDefaultValue(zIndex, config.zIndex);
  closeOnPressOutside = getDefaultValue(closeOnPressOutside, config.closeOnPressOutside); // 同步值

  useUpdateEffect(() => {
    setState({
      value
    });
  }, [value]);
  const onPressText = useCallback(() => {
    // 计算 Menu 的 Top 和元素高度
    // eslint-disable-next-line max-params
    config.MenuRef.current.measure((x, y, width, height, pageX, pageY) => {
      const topHeight = pageY - insets.top;
      const bottomHeight = windowHeight - pageY - height - insets.bottom;

      if (topHeight >= bottomHeight) {
        // 内容在上半部分
        setState({
          active: true,
          position: 'bottom',
          ctxStyle: {
            top: 0,
            height: pageY
          },
          shadeStyle: {
            top: pageY,
            bottom: 0
          }
        });
      } else {
        // 内容在下半部分
        setState({
          active: true,
          position: 'top',
          ctxStyle: {
            top: pageY + height,
            bottom: 0
          },
          shadeStyle: {
            top: 0,
            height: pageY + height
          }
        });
      }
    });
  }, [config.MenuRef, insets.bottom, insets.top, windowHeight]);
  const onPressShade = useCallback(() => {
    setState({
      active: false
    });
  }, []);
  /** 弹出层可以的最大高度 */

  const onLayoutPlace = useCallback(e => {
    setState({
      ctxMaxHeight: e.nativeEvent.layout.height
    });
  }, []);

  const genOnPressCell = o => () => {
    setState({
      value: o.value,
      active: false
    });
    onChange === null || onChange === void 0 ? void 0 : onChange(o.value);
  };

  const shadeStyles = [{
    position: 'absolute',
    left: 0,
    right: 0,
    zIndex // backgroundColor: '#f30', // to test ui

  }, state.shadeStyle];
  const boxStyles = [{
    position: 'absolute',
    left: 0,
    right: 0,
    zIndex,
    overflow: 'hidden' // backgroundColor: '#000', // to test ui

  }, state.ctxStyle];
  const text = (options.filter(op => op.value === state.value)[0] || {}).label;
  const isContextTop = state.position === 'bottom';
  const placeholderJSX = /*#__PURE__*/React.createElement(TouchableWithoutFeedback, {
    onPress: onPressShade
  }, /*#__PURE__*/React.createElement(View, {
    style: {
      height: insets.top
    }
  }));
  return /*#__PURE__*/React.createElement(React.Fragment, null, /*#__PURE__*/React.createElement(DropdownText, _extends({}, restProps, {
    style: titleStyle,
    textStyle: titleTextStyle,
    title: text,
    active: state.active,
    onPress: onPressText
  })), /*#__PURE__*/React.createElement(Portal, null, state.active ? /*#__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, {
    visible: state.active,
    style: POPUP_STYLE,
    lazyRender: lazyRender,
    position: state.position,
    duration: duration,
    onPressOverlay: onPressShade
  }, /*#__PURE__*/React.createElement(View, {
    style: {
      maxHeight: state.ctxMaxHeight
    }
  }, isContextTop ? placeholderJSX : null, /*#__PURE__*/React.createElement(ScrollView, {
    bounces: false
  }, options.map(opt => {
    return /*#__PURE__*/React.createElement(Cell, {
      key: opt.value,
      title: opt.label,
      valueExtra: opt.value === value ? /*#__PURE__*/React.createElement(IconSuccessOutline, {
        size: 16,
        color: config.activeColor
      }) : null,
      onPress: genOnPressCell(opt)
    });
  })), !isContextTop ? placeholderJSX : null)))));
};

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