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

🌈 React Native UI library

import React, { useEffect, useRef, useCallback, memo } from 'react';
import { Animated, BackHandler } from 'react-native';
import { useSafeAreaInsets } from 'react-native-safe-area-context';
import * as helpers from '../helpers';
import { usePersistFn } from '../hooks';
import useState from '../hooks/useStateUpdate';
import Overlay from '../overlay/overlay';
import Theme from '../theme';
import { getPosition, getTransform } from './helper';
import { varCreator, styleCreator, getBorderRadius, PopupPositionMap } from './style';
/**
 * Popup 弹出层
 * @description 弹出层容器，用于展示弹窗、信息提示等内容，支持多个弹出层叠加展示。
 */

const Popup = _ref => {
  let {
    children,
    style,
    visible = false,
    overlay = true,
    duration,
    closeOnPressOverlay = true,
    position = 'center',
    round = false,
    safeAreaInsetBottom = false,
    lazyRender = true,
    onPressOverlay: onPressOverlayFn,
    onOpen: onOpenFn,
    onOpened: onOpenedFn,
    onClose: onCloseFn,
    onClosed: onClosedFn,
    onRequestClose
  } = _ref;
  const insets = useSafeAreaInsets();
  const onPressOverlayPersistFn = usePersistFn(onPressOverlayFn);
  const onOpenPersistFn = usePersistFn(onOpenFn);
  const onOpenedPersistFn = usePersistFn(onOpenedFn);
  const onClosePersistFn = usePersistFn(onCloseFn);
  const onClosedPersistFn = usePersistFn(onClosedFn);
  const TOKENS = Theme.useThemeTokens();
  const CV = Theme.createVar(TOKENS, varCreator);
  const STYLES = Theme.createStyle(CV, styleCreator);
  duration = helpers.getDefaultValue(duration, TOKENS.animation_duration_base);
  const [state, setState] = useState({
    visible,
    // 遮罩层显示、隐藏单独管理，避免弹出层完成后才触发关闭，两个组件应该同时变化
    overlayVisible: visible,
    zIndex: helpers.getNextZIndex(),
    lazyRender
  });
  const MountedRef = useRef(false);
  const fadeAnim = useRef(new Animated.Value(getPosition(visible, position))).current;
  const fadeInstance = useRef(null);
  /** 点击遮罩层 */

  const onPressOverlay = useCallback(() => {
    if (closeOnPressOverlay) {
      // 关闭弹层
      onPressOverlayPersistFn();
    }
  }, [closeOnPressOverlay, onPressOverlayPersistFn]); // 监听状态变化，执行动画

  useEffect(() => {
    if (visible) {
      // 弹出弹出，立即响应
      setState({
        visible,
        zIndex: helpers.getNextZIndex(),
        lazyRender: false
      });
    } // 遮罩层状态实时显示


    setState({
      overlayVisible: visible
    });

    if (MountedRef.current) {
      fadeAnim.setValue(getPosition(!visible, position));

      if (visible) {
        onOpenPersistFn();
      } else {
        onClosePersistFn();
      }

      fadeInstance.current = Animated.timing(fadeAnim, // 动画中的变量值
      {
        toValue: getPosition(visible, position),
        duration: duration,
        useNativeDriver: true,
        easing: visible ? helpers.easing.easeOutCirc : helpers.easing.easeInCubic
      });
      fadeInstance.current.start(_ref2 => {
        let {
          finished
        } = _ref2;

        if (finished) {
          fadeInstance.current = null;

          if (!visible) {
            setState({
              visible
            });
            onClosedPersistFn();
          } else {
            onOpenedPersistFn();
          }
        }
      });
    }

    return () => {
      // 停止动画
      if (fadeInstance.current) {
        fadeInstance.current.stop();
        fadeInstance.current = null;
      }
    };
  }, [visible, duration, fadeAnim, position, onOpenPersistFn, onOpenedPersistFn, onClosePersistFn, onClosedPersistFn]); // 初始化好组件

  useEffect(() => {
    MountedRef.current = true;
  }, []); // Android 返回按钮

  useEffect(() => {
    const backHandler = BackHandler.addEventListener('hardwareBackPress', () => {
      if (typeof onRequestClose === 'function' && visible) {
        return onRequestClose();
      }

      return false;
    });
    return () => backHandler.remove();
  }, [onRequestClose, visible]);
  const popupStyles = [STYLES.popup, getBorderRadius(CV, position, round), {
    paddingBottom: safeAreaInsetBottom ? insets.bottom : 0,
    zIndex: state.zIndex
  }, style, state.visible ? [STYLES.popup_active, getTransform(position, fadeAnim), PopupPositionMap[position]] : null];

  if (state.lazyRender) {
    return null;
  }

  return /*#__PURE__*/React.createElement(React.Fragment, null, overlay ? /*#__PURE__*/React.createElement(Overlay, {
    visible: state.overlayVisible,
    zIndex: state.zIndex,
    duration: duration,
    onPress: onPressOverlay
  }) : null, /*#__PURE__*/React.createElement(Animated.View, {
    style: popupStyles,
    pointerEvents: position !== 'center' ? undefined : 'box-none'
  }, children));
};

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