react-native-collapsible-tab-view/lib/module/MaterialTabBar/Indicator.js

Collapsible tab view component for React Native

"use strict";

import React from 'react';
import { StyleSheet } from 'react-native';
import Animated, { useAnimatedStyle, useSharedValue, withTiming, interpolate } from 'react-native-reanimated';
import { isRTL } from '../helpers';
import { jsx as _jsx } from "react/jsx-runtime";
const Indicator = ({
  indexDecimal,
  itemsLayout,
  style,
  fadeIn = false
}) => {
  const opacity = useSharedValue(fadeIn ? 0 : 1);
  const stylez = useAnimatedStyle(() => {
    const firstItemX = itemsLayout[0]?.x ?? 0;
    const transform = [{
      translateX: itemsLayout.length > 1 ? interpolate(indexDecimal.value, itemsLayout.map((_, i) => i),
      // when in RTL mode, the X value should be inverted
      itemsLayout.map(v => isRTL ? -1 * v.x : v.x)) : isRTL ? -1 * firstItemX : firstItemX
    }];
    const width = itemsLayout.length > 1 ? interpolate(indexDecimal.value, itemsLayout.map((_, i) => i), itemsLayout.map(v => v.width)) : itemsLayout[0]?.width;
    return {
      transform,
      width,
      opacity: withTiming(opacity.value)
    };
  }, [indexDecimal, itemsLayout]);
  React.useEffect(() => {
    if (fadeIn) {
      opacity.value = 1;
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [fadeIn]);
  return /*#__PURE__*/_jsx(Animated.View, {
    style: [stylez, styles.indicator, style]
  });
};
const styles = StyleSheet.create({
  indicator: {
    height: 2,
    backgroundColor: '#2196f3',
    position: 'absolute',
    bottom: 0
  }
});
export { Indicator };
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