{"ast":null,"code":"var _interopRequireWildcard=require(\"@babel/runtime/helpers/interopRequireWildcard\");var _interopRequireDefault=require(\"@babel/runtime/helpers/interopRequireDefault\");Object.defineProperty(exports,\"__esModule\",{value:true});exports.default=void 0;var _extends2=_interopRequireDefault(require(\"@babel/runtime/helpers/extends\"));var _objectSpread2=_interopRequireDefault(require(\"@babel/runtime/helpers/objectSpread\"));var _classCallCheck2=_interopRequireDefault(require(\"@babel/runtime/helpers/classCallCheck\"));var _createClass2=_interopRequireDefault(require(\"@babel/runtime/helpers/createClass\"));var _possibleConstructorReturn2=_interopRequireDefault(require(\"@babel/runtime/helpers/possibleConstructorReturn\"));var _getPrototypeOf3=_interopRequireDefault(require(\"@babel/runtime/helpers/getPrototypeOf\"));var _inherits2=_interopRequireDefault(require(\"@babel/runtime/helpers/inherits\"));var React=_interopRequireWildcard(require(\"react\"));var 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Array(_len),_key=0;_key<_len;_key++){args[_key]=arguments[_key];}_this=(0,_possibleConstructorReturn2.default)(this,(_getPrototypeOf2=(0,_getPrototypeOf3.default)(TabBar)).call.apply(_getPrototypeOf2,[this].concat(args)));_this.state={layout:{width:0,height:0},tabWidths:{}};_this.measuredTabWidths={};_this.scrollAmount=new _reactNativeReanimated.default.Value(0);_this.getFlattenedTabWidth=function(style){var tabStyle=_StyleSheet.default.flatten(style);return tabStyle?tabStyle.width:undefined;};_this.getComputedTabWidth=function(index,layout,routes,scrollEnabled,tabWidths,flattenedWidth){if(flattenedWidth==='auto'){return tabWidths[routes[index].key]||0;}switch(typeof flattenedWidth){case'number':return flattenedWidth;case'string':if(flattenedWidth.endsWith('%')){var width=parseFloat(flattenedWidth);if(Number.isFinite(width)){return layout.width*(width/100);}}}if(scrollEnabled){return layout.width/5*2;}return layout.width/routes.length;};_this.getMemoizedTabWidthGettter=(0,_memoize.default)(function(layout,routes,scrollEnabled,tabWidths,flattenedWidth){return function(i){return _this.getComputedTabWidth(i,layout,routes,scrollEnabled,tabWidths,flattenedWidth);};});_this.getMaxScrollDistance=function(tabBarWidth,layoutWidth){return tabBarWidth-layoutWidth;};_this.getTabBarWidth=function(props,state){var layout=state.layout,tabWidths=state.tabWidths;var scrollEnabled=props.scrollEnabled,tabStyle=props.tabStyle;var routes=props.navigationState.routes;return routes.reduce(function(acc,_,i){return acc+_this.getComputedTabWidth(i,layout,routes,scrollEnabled,tabWidths,_this.getFlattenedTabWidth(tabStyle));},0);};_this.normalizeScrollValue=function(props,state,value){var layout=state.layout;var tabBarWidth=_this.getTabBarWidth(props,state);var maxDistance=_this.getMaxScrollDistance(tabBarWidth,layout.width);var 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_e$nativeEvent$layout=e.nativeEvent.layout,height=_e$nativeEvent$layout.height,width=_e$nativeEvent$layout.width;if(_this.state.layout.width===width&&_this.state.layout.height===height){return;}_this.setState({layout:{height:height,width:width}});};_this.getTranslateX=(0,_memoize.default)(function(scrollAmount,maxScrollDistance){return _reactNativeReanimated.default.multiply(_Platform.default.OS==='android'&&_I18nManager.default.isRTL?_reactNativeReanimated.default.sub(maxScrollDistance,scrollAmount):scrollAmount,_I18nManager.default.isRTL?1:-1);});return _this;}(0,_createClass2.default)(TabBar,[{key:\"componentDidUpdate\",value:function componentDidUpdate(prevProps,prevState){var navigationState=this.props.navigationState;var 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* as React from 'react';\nimport {\n  StyleSheet,\n  View,\n  ScrollView,\n  StyleProp,\n  ViewStyle,\n  TextStyle,\n  LayoutChangeEvent,\n  I18nManager,\n  Platform,\n} from 'react-native';\nimport Animated from 'react-native-reanimated';\nimport TabBarItem from './TabBarItem';\nimport TabBarIndicator, { Props as IndicatorProps } from './TabBarIndicator';\nimport memoize from './memoize';\nimport {\n  Route,\n  Scene,\n  SceneRendererProps,\n  NavigationState,\n  Layout,\n  Event,\n} from './types';\n\nexport type Props<T extends Route> = SceneRendererProps & {\n  navigationState: NavigationState<T>;\n  scrollEnabled?: boolean;\n  bounces?: boolean;\n  activeColor?: string;\n  inactiveColor?: string;\n  pressColor?: string;\n  pressOpacity?: number;\n  getLabelText: (scene: Scene<T>) => string | undefined;\n  getAccessible: (scene: Scene<T>) => boolean | undefined;\n  getAccessibilityLabel: (scene: Scene<T>) => string | undefined;\n  getTestID: (scene: Scene<T>) => string | undefined;\n  renderLabel?: (\n    scene: Scene<T> & {\n      focused: boolean;\n      color: string;\n    }\n  ) => React.ReactNode;\n  renderIcon?: (\n    scene: Scene<T> & {\n      focused: boolean;\n      color: string;\n    }\n  ) => React.ReactNode;\n  renderBadge?: (scene: Scene<T>) => React.ReactNode;\n  renderIndicator: (props: IndicatorProps<T>) => React.ReactNode;\n  onTabPress?: (scene: Scene<T> & Event) => void;\n  onTabLongPress?: (scene: Scene<T>) => void;\n  tabStyle?: StyleProp<ViewStyle>;\n  indicatorStyle?: StyleProp<ViewStyle>;\n  indicatorContainerStyle?: StyleProp<ViewStyle>;\n  labelStyle?: StyleProp<TextStyle>;\n  contentContainerStyle?: StyleProp<ViewStyle>;\n  style?: StyleProp<ViewStyle>;\n};\n\ntype State = {\n  layout: Layout;\n  tabWidths: { [key: string]: number };\n};\n\nexport default class TabBar<T extends Route> extends React.Component<\n  Props<T>,\n  State\n> {\n  static defaultProps = {\n    getLabelText: ({ route }: Scene<Route>) =>\n      typeof route.title === 'string' ? route.title.toUpperCase() : route.title,\n    getAccessible: ({ route }: Scene<Route>) =>\n      typeof route.accessible !== 'undefined' ? route.accessible : true,\n    getAccessibilityLabel: ({ route }: Scene<Route>) =>\n      typeof route.accessibilityLabel === 'string'\n        ? route.accessibilityLabel\n        : typeof route.title === 'string'\n        ? route.title\n        : undefined,\n    getTestID: ({ route }: Scene<Route>) => route.testID,\n    renderIndicator: (props: IndicatorProps<Route>) => (\n      <TabBarIndicator {...props} />\n    ),\n  };\n\n  state: State = {\n    layout: { width: 0, height: 0 },\n    tabWidths: {},\n  };\n\n  componentDidUpdate(prevProps: Props<T>, prevState: State) {\n    const { navigationState } = this.props;\n    const { layout, tabWidths } = this.state;\n\n    if (\n      prevProps.navigationState.routes.length !==\n        navigationState.routes.length ||\n      prevProps.navigationState.index !== navigationState.index ||\n      prevState.layout.width !== layout.width ||\n      prevState.tabWidths !== tabWidths\n    ) {\n      if (\n        this.getFlattenedTabWidth(this.props.tabStyle) === 'auto' &&\n        !(\n          layout.width &&\n          navigationState.routes.every(\n            r => typeof tabWidths[r.key] === 'number'\n          )\n        )\n      ) {\n        // When tab width is dynamic, only adjust the scroll once we have all tab widths and layout\n        return;\n      }\n\n      this.resetScroll(navigationState.index);\n    }\n  }\n\n  // to store the layout.width of each tab\n  // when all onLayout's are fired, this would be set in state\n  private measuredTabWidths: { [key: string]: number } = {};\n\n  private scrollAmount = new Animated.Value(0);\n\n  private scrollView: ScrollView | undefined;\n\n  private getFlattenedTabWidth = (style: StyleProp<ViewStyle>) => {\n    const tabStyle = StyleSheet.flatten(style);\n\n    return tabStyle ? tabStyle.width : undefined;\n  };\n\n  private getComputedTabWidth = (\n    index: number,\n    layout: Layout,\n    routes: Route[],\n    scrollEnabled: boolean | undefined,\n    tabWidths: { [key: string]: number },\n    flattenedWidth: string | number | undefined\n  ) => {\n    if (flattenedWidth === 'auto') {\n      return tabWidths[routes[index].key] || 0;\n    }\n\n    switch (typeof flattenedWidth) {\n      case 'number':\n        return flattenedWidth;\n      case 'string':\n        if (flattenedWidth.endsWith('%')) {\n          const width = parseFloat(flattenedWidth);\n          if (Number.isFinite(width)) {\n            return layout.width * (width / 100);\n          }\n        }\n    }\n\n    if (scrollEnabled) {\n      return (layout.width / 5) * 2;\n    }\n\n    return layout.width / routes.length;\n  };\n\n  private getMemoizedTabWidthGettter = memoize(\n    (\n      layout: Layout,\n      routes: Route[],\n      scrollEnabled: boolean | undefined,\n      tabWidths: { [key: string]: number },\n      flattenedWidth: string | number | undefined\n    ) => (i: number) =>\n      this.getComputedTabWidth(\n        i,\n        layout,\n        routes,\n        scrollEnabled,\n        tabWidths,\n        flattenedWidth\n      )\n  );\n\n  private getMaxScrollDistance = (tabBarWidth: number, layoutWidth: number) =>\n    tabBarWidth - layoutWidth;\n\n  private getTabBarWidth = (props: Props<T>, state: State) => {\n    const { layout, tabWidths } = state;\n    const { scrollEnabled, tabStyle } = props;\n    const { routes } = props.navigationState;\n\n    return routes.reduce<number>(\n      (acc, _, i) =>\n        acc +\n        this.getComputedTabWidth(\n          i,\n          layout,\n          routes,\n          scrollEnabled,\n          tabWidths,\n          this.getFlattenedTabWidth(tabStyle)\n        ),\n      0\n    );\n  };\n\n  private normalizeScrollValue = (\n    props: Props<T>,\n    state: State,\n    value: number\n  ) => {\n    const { layout } = state;\n    const tabBarWidth = this.getTabBarWidth(props, state);\n    const maxDistance = this.getMaxScrollDistance(tabBarWidth, layout.width);\n    const scrollValue = Math.max(Math.min(value, maxDistance), 0);\n\n    if (Platform.OS === 'android' && I18nManager.isRTL) {\n      // On Android, scroll value is not applied in reverse in RTL\n      // so we need to manually adjust it to apply correct value\n      return maxDistance - scrollValue;\n    }\n\n    return scrollValue;\n  };\n\n  private getScrollAmount = (props: Props<T>, state: State, index: number) => {\n    const { layout, tabWidths } = state;\n    const { scrollEnabled, tabStyle } = props;\n    const { routes } = props.navigationState;\n\n    const centerDistance = Array.from({ length: index + 1 }).reduce<number>(\n      (total, _, i) => {\n        const tabWidth = this.getComputedTabWidth(\n          i,\n          layout,\n          routes,\n          scrollEnabled,\n          tabWidths,\n          this.getFlattenedTabWidth(tabStyle)\n        );\n\n        // To get the current index centered we adjust scroll amount by width of indexes\n        // 0 through (i - 1) and add half the width of current index i\n        return total + (index === i ? tabWidth / 2 : tabWidth);\n      },\n      0\n    );\n\n    const scrollAmount = centerDistance - layout.width / 2;\n\n    return this.normalizeScrollValue(props, state, scrollAmount);\n  };\n\n  private resetScroll = (index: number) => {\n    if (this.props.scrollEnabled) {\n      this.scrollView &&\n        this.scrollView.scrollTo({\n          x: this.getScrollAmount(this.props, this.state, index),\n          animated: true,\n        });\n    }\n  };\n\n  private handleLayout = (e: LayoutChangeEvent) => {\n    const { height, width } = e.nativeEvent.layout;\n\n    if (\n      this.state.layout.width === width &&\n      this.state.layout.height === height\n    ) {\n      return;\n    }\n\n    this.setState({\n      layout: {\n        height,\n        width,\n      },\n    });\n  };\n\n  private getTranslateX = memoize(\n    (scrollAmount: Animated.Node<number>, maxScrollDistance: number) =>\n      Animated.multiply(\n        Platform.OS === 'android' && I18nManager.isRTL\n          ? Animated.sub(maxScrollDistance, scrollAmount)\n          : scrollAmount,\n        I18nManager.isRTL ? 1 : -1\n      )\n  );\n\n  render() {\n    const {\n      position,\n      navigationState,\n      jumpTo,\n      scrollEnabled,\n      bounces,\n      getAccessibilityLabel,\n      getAccessible,\n      getLabelText,\n      getTestID,\n      renderBadge,\n      renderIcon,\n      renderLabel,\n      activeColor,\n      inactiveColor,\n      pressColor,\n      pressOpacity,\n      onTabPress,\n      onTabLongPress,\n      tabStyle,\n      labelStyle,\n      indicatorStyle,\n      contentContainerStyle,\n      style,\n      indicatorContainerStyle,\n    } = this.props;\n    const { layout, tabWidths } = this.state;\n    const { routes } = navigationState;\n\n    const isWidthDynamic = this.getFlattenedTabWidth(tabStyle) === 'auto';\n    const tabBarWidth = this.getTabBarWidth(this.props, this.state);\n    const tabBarWidthPercent = `${routes.length * 40}%`;\n    const translateX = this.getTranslateX(\n      this.scrollAmount,\n      this.getMaxScrollDistance(tabBarWidth, layout.width)\n    );\n\n    return (\n      <Animated.View\n        onLayout={this.handleLayout}\n        style={[styles.tabBar, style]}\n      >\n        <Animated.View\n          pointerEvents=\"none\"\n          style={[\n            styles.indicatorContainer,\n            scrollEnabled ? { transform: [{ translateX }] as any } : null,\n            tabBarWidth\n              ? { width: tabBarWidth }\n              : scrollEnabled\n              ? { width: tabBarWidthPercent }\n              : null,\n            indicatorContainerStyle,\n          ]}\n        >\n          {this.props.renderIndicator({\n            position,\n            layout,\n            navigationState,\n            jumpTo,\n            width: isWidthDynamic ? 'auto' : `${100 / routes.length}%`,\n            style: indicatorStyle,\n            getTabWidth: this.getMemoizedTabWidthGettter(\n              layout,\n              routes,\n              scrollEnabled,\n              tabWidths,\n              this.getFlattenedTabWidth(tabStyle)\n            ),\n          })}\n        </Animated.View>\n        <View style={styles.scroll}>\n          <Animated.ScrollView\n            horizontal\n            keyboardShouldPersistTaps=\"handled\"\n            scrollEnabled={scrollEnabled}\n            bounces={bounces}\n            alwaysBounceHorizontal={false}\n            scrollsToTop={false}\n            showsHorizontalScrollIndicator={false}\n            automaticallyAdjustContentInsets={false}\n            overScrollMode=\"never\"\n            contentContainerStyle={[\n              styles.tabContent,\n              scrollEnabled\n                ? { width: tabBarWidth || tabBarWidthPercent }\n                : styles.container,\n              contentContainerStyle,\n            ]}\n            scrollEventThrottle={16}\n            onScroll={Animated.event([\n              {\n                nativeEvent: {\n                  contentOffset: { x: this.scrollAmount },\n                },\n              },\n            ])}\n            ref={el => {\n              // @ts-ignore\n              this.scrollView = el && el.getNode();\n            }}\n          >\n            {routes.map((route: T) => (\n              <TabBarItem\n                onLayout={\n                  isWidthDynamic\n                    ? e => {\n                        this.measuredTabWidths[route.key] =\n                          e.nativeEvent.layout.width;\n\n                        // When we have measured widths for all of the tabs, we should updates the state\n                        // We avoid doing separate setState for each layout since it triggers multiple renders and slows down app\n                        if (\n                          routes.every(\n                            r =>\n                              typeof this.measuredTabWidths[r.key] === 'number'\n                          )\n                        ) {\n                          this.setState({\n                            tabWidths: { ...this.measuredTabWidths },\n                          });\n                        }\n                      }\n                    : undefined\n                }\n                key={route.key}\n                position={position}\n                route={route}\n                navigationState={navigationState}\n                getAccessibilityLabel={getAccessibilityLabel}\n                getAccessible={getAccessible}\n                getLabelText={getLabelText}\n                getTestID={getTestID}\n                renderBadge={renderBadge}\n                renderIcon={renderIcon}\n                renderLabel={renderLabel}\n                activeColor={activeColor}\n                inactiveColor={inactiveColor}\n                pressColor={pressColor}\n                pressOpacity={pressOpacity}\n                onPress={() => {\n                  const event: Scene<T> & Event = {\n                    route,\n                    defaultPrevented: false,\n                    preventDefault: () => {\n                      event.defaultPrevented = true;\n                    },\n                  };\n\n                  onTabPress && onTabPress(event);\n\n                  if (event.defaultPrevented) {\n                    return;\n                  }\n\n                  this.props.jumpTo(route.key);\n                }}\n                onLongPress={() => onTabLongPress && onTabLongPress({ route })}\n                labelStyle={labelStyle}\n                style={tabStyle}\n              />\n            ))}\n          </Animated.ScrollView>\n        </View>\n      </Animated.View>\n    );\n  }\n}\n\nconst styles = StyleSheet.create({\n  container: {\n    flex: 1,\n  },\n  scroll: {\n    overflow: 'scroll',\n  },\n  tabBar: {\n    backgroundColor: '#2196f3',\n    elevation: 4,\n    shadowColor: 'black',\n    shadowOpacity: 0.1,\n    shadowRadius: StyleSheet.hairlineWidth,\n    shadowOffset: {\n      height: StyleSheet.hairlineWidth,\n      width: 0,\n    },\n    zIndex: 1,\n  },\n  tabContent: {\n    flexDirection: 'row',\n    flexWrap: 'nowrap',\n  },\n  indicatorContainer: {\n    position: 'absolute',\n    top: 0,\n    left: 0,\n    right: 0,\n    bottom: 0,\n  },\n});\n"]},"metadata":{},"sourceType":"script"}