react-native-reanimated#not TypeScript Examples

CardModal = ({
  children,
  visible,
  cardHeight = layoutUtil.height,
  almostTuckedIn = false,
  cardStyle,
}: Props) => {
  const animation = useValue(0)
  const heightValue = useMemo(() => multiply(-cardHeight, HEIGHT_OFFSET), [
    cardHeight,
  ])

  const isTuckedIn = bin(visible)
  const isAlmostTuckedIn = bin(almostTuckedIn)

  useCode(
    () => [
      cond(
        // down animation
        or(not(isTuckedIn), isAlmostTuckedIn),
        set(
          animation,
          spring({
            to: cond(isAlmostTuckedIn, TUCK_IN_HEIGHT, 0),
            from: animation,
            config: {
              damping: new Value(20),
              mass: 0.6,
            },
          })
        ),
        cond(or(isTuckedIn, not(isAlmostTuckedIn)), [
          // up animation
          set(
            animation,
            spring({
              to: heightValue,
              from: animation,
              config: {
                damping: new Value(20),
                mass: 0.8,
              },
            })
          ),
        ])
      ),
    ],
    [visible, heightValue, almostTuckedIn]
  )

  return (
    <>
      <Animated.View
        style={[
          styles.card,
          {
            height: cardHeight * HEIGHT_OFFSET,
            bottom: -cardHeight * HEIGHT_OFFSET,
            transform: [{ translateY: animation }],
          },
          cardStyle,
        ]}
      >
        {children}
      </Animated.View>
    </>
  )
}

useTiming = ({
  animatedStaticIndex,
  animatedOverrideIndex,
  value,
  velocity,
  state,
  size,
  screenWidth,
}: useTimingProps) => {
  const clock = useClock();
  const isManuallyAnimated = useValue(0);

  const config = useMemo(
    () => ({
      toValue: new Animated.Value(0),
      duration: 500,
      easing: Easing.out(Easing.exp),
    }),
    []
  );

  const animationState = useMemo(
    () => ({
      finished: new Animated.Value(0),
      position: new Animated.Value(0),
      frameTime: new Animated.Value(0),
      time: new Animated.Value(0),
    }),
    []
  );

  const valueClamp = useMemo(
    () =>
      interpolate(value, {
        inputRange: [screenWidth * -1, 0, screenWidth],
        outputRange: I18nManager.isRTL ? [-1, 0, 1] : [1, 0, -1],
        extrapolate: Animated.Extrapolate.CLAMP,
      }),
    [value, screenWidth]
  );

  const velocityClamp = useMemo(
    () =>
      interpolate(velocity, {
        inputRange: [screenWidth * -2, 0, screenWidth * 2],
        outputRange: I18nManager.isRTL ? [-0.5, 0, 0.5] : [0.5, 0, -0.5],
        extrapolate: Animated.Extrapolate.CLAMP,
      }),
    [screenWidth, velocity]
  );

  const isTimingInterrupted = and(eq(state, State.BEGAN), clockRunning(clock));
  const finishTiming = useMemo(
    () => [
      set(animatedStaticIndex, config.toValue),
      set(animatedOverrideIndex, config.toValue),
      set(animationState.frameTime, 0),
      set(animationState.time, 0),
      set(state, State.UNDETERMINED),
      set(isManuallyAnimated, 0),
      stopClock(clock),
    ],
    [
      state,
      animatedOverrideIndex,
      animatedStaticIndex,
      animationState.frameTime,
      animationState.time,
      clock,
      config.toValue,
      isManuallyAnimated,
    ]
  );

  const shouldAnimate = useMemo(
    () =>
      and(
        not(and(eq(animatedStaticIndex, 0), lessThan(valueClamp, 0))),
        not(and(eq(animatedStaticIndex, size - 1), greaterThan(valueClamp, 0)))
      ),
    [animatedStaticIndex, size, valueClamp]
  );
  const shouldReset = useMemo(
    () => not(greaterThan(add(abs(valueClamp), abs(velocityClamp)), 0.5)),
    [valueClamp, velocityClamp]
  );
  const shouldAnimateNext = useMemo(
    () =>
      greaterThan(
        add(animationState.position, velocityClamp),
        animatedStaticIndex
      ),
    [animatedStaticIndex, animationState.position, velocityClamp]
  );

  const animatedPosition = useMemo(
    () =>
      block([
        cond(isTimingInterrupted, finishTiming),
        cond(
          eq(state, State.ACTIVE),
          cond(
            and(
              not(and(eq(animatedStaticIndex, 0), lessThan(valueClamp, 0))),
              not(
                and(
                  eq(animatedStaticIndex, size - 1),
                  greaterThan(valueClamp, 0)
                )
              )
            ),
            [
              set(animationState.finished, 0),
              set(
                animationState.position,
                add(animatedStaticIndex, valueClamp)
              ),
            ]
          )
        ),

        onChange(animatedOverrideIndex, [
          set(isManuallyAnimated, 1),
          set(animationState.finished, 0),
        ]),

        cond(or(eq(state, State.END), isManuallyAnimated), [
          cond(and(not(clockRunning(clock)), not(animationState.finished)), [
            cond(
              isManuallyAnimated,
              set(config.toValue, animatedOverrideIndex),
              cond(
                or(shouldReset, not(shouldAnimate)),
                set(config.toValue, animatedStaticIndex),
                cond(
                  shouldAnimateNext,
                  set(config.toValue, add(animatedStaticIndex, 1)),
                  set(config.toValue, sub(animatedStaticIndex, 1))
                )
              )
            ),
            set(animationState.finished, 0),
            set(animationState.frameTime, 0),
            set(animationState.time, 0),
            startClock(clock),
          ]),
          timing(clock, animationState, config),
          cond(animationState.finished, finishTiming),
        ]),

        animationState.position,
      ]),
    [
      size,
      state,
      animatedOverrideIndex,
      animatedStaticIndex,
      animationState,
      clock,
      config,
      finishTiming,
      isManuallyAnimated,
      isTimingInterrupted,
      shouldAnimate,
      shouldAnimateNext,
      shouldReset,
      valueClamp,
    ]
  );
  return animatedPosition;
}

render() {
    const {
      renderHandle,
      snapPoints,
      initialSnapIndex,
      componentType,
      onSettle,
      animatedPosition,
      containerStyle,
      ...rest
    } = this.props;
    const AnimatedScrollableComponent = this.scrollComponent;
    const normalisedSnapPoints = this.getNormalisedSnapPoints();
    const initialSnap = normalisedSnapPoints[initialSnapIndex];

    const Content = (
      <Animated.View
        style={[
          StyleSheet.absoluteFillObject,
          containerStyle,
          // @ts-ignore
          {
            transform: [{ translateY: this.translateY }],
          },
        ]}
      >
        <PanGestureHandler
          ref={this.drawerHandleRef}
          shouldCancelWhenOutside={false}
          simultaneousHandlers={this.masterDrawer}
          onGestureEvent={this.onHandleGestureEvent}
          onHandlerStateChange={this.onHandleGestureEvent}
        >
          <Animated.View>{renderHandle()}</Animated.View>
        </PanGestureHandler>
        <PanGestureHandler
          ref={this.drawerContentRef}
          simultaneousHandlers={[this.scrollComponentRef, this.masterDrawer]}
          shouldCancelWhenOutside={false}
          onGestureEvent={this.onDrawerGestureEvent}
          onHandlerStateChange={this.onDrawerGestureEvent}
        >
          <Animated.View style={styles.container}>
            <NativeViewGestureHandler
              ref={this.scrollComponentRef}
              waitFor={this.masterDrawer}
              simultaneousHandlers={this.drawerContentRef}
            >
              <AnimatedScrollableComponent
                overScrollMode="never"
                bounces={false}
                {...rest}
                ref={this.props.innerRef}
                // @ts-ignore
                decelerationRate={this.decelerationRate}
                onScrollBeginDrag={this.onScrollBeginDrag}
                scrollEventThrottle={1}
                contentContainerStyle={[
                  rest.contentContainerStyle,
                  { paddingBottom: this.getNormalisedSnapPoints()[0] },
                ]}
              />
            </NativeViewGestureHandler>
          </Animated.View>
        </PanGestureHandler>
        {this.props.animatedPosition && (
          <Animated.Code
            exec={onChange(
              this.position,
              set(this.props.animatedPosition, this.position)
            )}
          />
        )}
        <Animated.Code
          exec={onChange(
            this.dragY,
            cond(not(eq(this.dragY, 0)), set(this.prevDragY, this.dragY))
          )}
        />
        <Animated.Code
          exec={onChange(
            this.didGestureFinish,
            cond(this.didGestureFinish, [
              this.didScrollUpAndPullDown,
              this.setTranslationY,
              set(
                this.tempDestSnapPoint,
                add(normalisedSnapPoints[0], this.extraOffset)
              ),
              set(this.nextSnapIndex, 0),
              set(this.destSnapPoint, this.calculateNextSnapPoint()),
              cond(
                and(
                  greaterThan(this.dragY, this.lastStartScrollY),
                  this.isAndroid,
                  not(this.dragWithHandle)
                ),
                call([], () => {
                  // This prevents the scroll glide from happening on Android when pulling down with inertia.
                  // It's not perfect, but does the job for now
                  const { method, args } = imperativeScrollOptions[
                    this.props.componentType
                  ];
                  // @ts-ignore
                  const node = this.props.innerRef.current?.getNode();

                  if (
                    node &&
                    node[method] &&
                    ((this.props.componentType === 'FlatList' &&
                      (this.props?.data?.length || 0) > 0) ||
                      (this.props.componentType === 'SectionList' &&
                        this.props.sections.length > 0) ||
                      this.props.componentType === 'ScrollView')
                  ) {
                    node[method](args);
                  }
                })
              ),
              set(this.dragY, 0),
              set(this.velocityY, 0),
              set(
                this.lastSnap,
                sub(
                  this.destSnapPoint,
                  cond(
                    eq(this.scrollUpAndPullDown, 1),
                    this.lastStartScrollY,
                    0
                  )
                )
              ),
              call([this.lastSnap], ([value]) => {
                // This is the TapGHandler trick
                // @ts-ignore
                this.masterDrawer?.current?.setNativeProps({
                  maxDeltaY: value - this.getNormalisedSnapPoints()[0],
                });
              }),
              set(
                this.decelerationRate,
                cond(
                  eq(this.isAndroid, 1),
                  cond(
                    eq(this.lastSnap, normalisedSnapPoints[0]),
                    ANDROID_NORMAL_DECELERATION_RATE,
                    0
                  ),
                  IOS_NORMAL_DECELERATION_RATE
                )
              ),
            ])
          )}
        />
        <Animated.Code
          exec={onChange(this.isManuallySetValue, [
            cond(
              this.isManuallySetValue,
              [
                set(this.destSnapPoint, this.manualYOffset),
                set(this.animationFinished, 0),
                set(this.lastSnap, this.manualYOffset),
                call([this.lastSnap], ([value]) => {
                  // This is the TapGHandler trick
                  // @ts-ignore
                  this.masterDrawer?.current?.setNativeProps({
                    maxDeltaY: value - this.getNormalisedSnapPoints()[0],
                  });
                }),
              ],
              [set(this.nextSnapIndex, 0)]
            ),
          ])}
        />
      </Animated.View>
    );

    // On Android, having an intermediary view with pointerEvents="box-none", breaks the
    // waitFor logic
    if (Platform.OS === 'android') {
      return (
        <TapGestureHandler
          maxDurationMs={100000}
          ref={this.masterDrawer}
          maxDeltaY={initialSnap - this.getNormalisedSnapPoints()[0]}
          shouldCancelWhenOutside={false}
        >
          {Content}
        </TapGestureHandler>
      );
    }

    // On iOS, We need to wrap the content on a view with PointerEvents box-none
    // So that we can start scrolling automatically when reaching the top without
    // Stopping the gesture
    return (
      <TapGestureHandler
        maxDurationMs={100000}
        ref={this.masterDrawer}
        maxDeltaY={initialSnap - this.getNormalisedSnapPoints()[0]}
      >
        <View style={StyleSheet.absoluteFillObject} pointerEvents="box-none">
          {Content}
        </View>
      </TapGestureHandler>
    );
  }

constructor(props: Props<T>) {
    super(props);
    const { initialSnapIndex, animationType } = props;

    const animationDriver = animationType === 'timing' ? 0 : 1;
    const animationDuration =
      (props.animationType === 'timing' && props.animationConfig?.duration) ||
      DEFAULT_ANIMATION_DURATION;

    const ScrollComponent = this.getScrollComponent();
    // @ts-ignore
    this.scrollComponent = Animated.createAnimatedComponent(ScrollComponent);

    const snapPoints = this.getNormalisedSnapPoints();
    const openPosition = snapPoints[0];
    const closedPosition = this.props.enableOverScroll
      ? windowHeight
      : snapPoints[snapPoints.length - 1];
    const initialSnap = snapPoints[initialSnapIndex];
    this.nextSnapIndex = new Value(initialSnapIndex);

    const initialDecelerationRate = Platform.select({
      android:
        props.initialSnapIndex === 0 ? ANDROID_NORMAL_DECELERATION_RATE : 0,
      ios: IOS_NORMAL_DECELERATION_RATE,
    });
    this.decelerationRate = new Value(initialDecelerationRate);

    const handleGestureState = new Value<GestureState>(-1);
    const handleOldGestureState = new Value<GestureState>(-1);
    const drawerGestureState = new Value<GestureState>(-1);
    const drawerOldGestureState = new Value<GestureState>(-1);

    const lastSnapInRange = new Value(1);
    this.prevTranslateYOffset = new Value(initialSnap);
    this.translationY = new Value(initialSnap);

    this.lastSnap = new Value(initialSnap);

    this.onHandleGestureEvent = event([
      {
        nativeEvent: {
          translationY: this.dragY,
          oldState: handleOldGestureState,
          state: handleGestureState,
          velocityY: this.velocityY,
        },
      },
    ]);
    this.onDrawerGestureEvent = event([
      {
        nativeEvent: {
          translationY: this.dragY,
          oldState: drawerOldGestureState,
          state: drawerGestureState,
          velocityY: this.velocityY,
        },
      },
    ]);
    this.onScrollBeginDrag = event([
      {
        nativeEvent: {
          contentOffset: { y: this.lastStartScrollY },
        },
      },
    ]);

    const didHandleGestureBegin = eq(handleGestureState, GestureState.ACTIVE);

    const isAnimationInterrupted = and(
      or(
        eq(handleGestureState, GestureState.BEGAN),
        eq(drawerGestureState, GestureState.BEGAN),
        and(
          eq(this.isAndroid, 0),
          eq(animationDriver, 1),
          or(
            eq(drawerGestureState, GestureState.ACTIVE),
            eq(handleGestureState, GestureState.ACTIVE)
          )
        )
      ),
      clockRunning(this.animationClock)
    );

    this.didGestureFinish = or(
      and(
        eq(handleOldGestureState, GestureState.ACTIVE),
        eq(handleGestureState, GestureState.END)
      ),
      and(
        eq(drawerOldGestureState, GestureState.ACTIVE),
        eq(drawerGestureState, GestureState.END)
      )
    );

    // Function that determines if the last snap point is in the range {snapPoints}
    // In the case of interruptions in the middle of an animation, we'll get
    // lastSnap values outside the range
    const isLastSnapPointInRange = (i: number = 0): Animated.Node<number> =>
      i === snapPoints.length
        ? lastSnapInRange
        : cond(
            eq(this.lastSnap, snapPoints[i]),
            [set(lastSnapInRange, 1)],
            isLastSnapPointInRange(i + 1)
          );

    const scrollY = [
      set(lastSnapInRange, 0),
      isLastSnapPointInRange(),
      cond(
        or(
          didHandleGestureBegin,
          and(
            this.isManuallySetValue,
            not(eq(this.manualYOffset, snapPoints[0]))
          )
        ),
        [set(this.dragWithHandle, 1), 0]
      ),
      cond(
        // This is to account for a continuous scroll on the drawer from a snap point
        // Different than top, bringing the drawer to the top position, so that if we
        // change scroll direction without releasing the gesture, it doesn't pull down the drawer again
        and(
          eq(this.dragWithHandle, 1),
          greaterThan(snapPoints[0], add(this.lastSnap, this.dragY)),
          and(not(eq(this.lastSnap, snapPoints[0])), lastSnapInRange)
        ),
        [
          set(this.lastSnap, snapPoints[0]),
          set(this.dragWithHandle, 0),
          this.lastStartScrollY,
        ],
        cond(eq(this.dragWithHandle, 1), 0, this.lastStartScrollY)
      ),
    ];

    this.didScrollUpAndPullDown = cond(
      and(
        greaterOrEq(this.dragY, this.lastStartScrollY),
        greaterThan(this.lastStartScrollY, 0)
      ),
      set(this.scrollUpAndPullDown, 1)
    );

    this.setTranslationY = cond(
      and(
        not(this.dragWithHandle),
        not(greaterOrEq(this.dragY, this.lastStartScrollY))
      ),
      set(this.translationY, sub(this.dragY, this.lastStartScrollY)),
      set(this.translationY, this.dragY)
    );

    this.extraOffset = cond(
      eq(this.scrollUpAndPullDown, 1),
      this.lastStartScrollY,
      0
    );
    const endOffsetY = add(
      this.lastSnap,
      this.translationY,
      multiply(1 - props.friction, this.velocityY)
    );

    this.calculateNextSnapPoint = (i = 0): Animated.Node<number> | number =>
      i === snapPoints.length
        ? this.tempDestSnapPoint
        : cond(
            greaterThan(
              abs(sub(this.tempDestSnapPoint, endOffsetY)),
              abs(sub(add(snapPoints[i], this.extraOffset), endOffsetY))
            ),
            [
              set(this.tempDestSnapPoint, add(snapPoints[i], this.extraOffset)),
              set(this.nextSnapIndex, i),
              this.calculateNextSnapPoint(i + 1),
            ],
            this.calculateNextSnapPoint(i + 1)
          );

    const runAnimation = ({
      clock,
      from,
      to,
      position,
      finished,
      velocity,
      frameTime,
    }: TimingParams) => {
      const state = {
        finished,
        velocity: new Value(0),
        position,
        time: new Value(0),
        frameTime,
      };

      const timingConfig = {
        duration: animationDuration,
        easing:
          (props.animationType === 'timing' && props.animationConfig?.easing) ||
          DEFAULT_EASING,
        toValue: new Value(0),
      };

      const springConfig = {
        ...DEFAULT_SPRING_PARAMS,
        ...((props.animationType === 'spring' && props.animationConfig) || {}),
        toValue: new Value(0),
      };

      return [
        cond(and(not(clockRunning(clock)), not(eq(finished, 1))), [
          // If the clock isn't running, we reset all the animation params and start the clock
          set(state.finished, 0),
          set(state.velocity, velocity),
          set(state.time, 0),
          set(state.position, from),
          set(state.frameTime, 0),
          set(timingConfig.toValue, to),
          set(springConfig.toValue, to),
          startClock(clock),
        ]),
        // We run the step here that is going to update position
        cond(
          eq(animationDriver, 0),
          timing(clock, state, timingConfig),
          spring(clock, state, springConfig)
        ),
        cond(
          state.finished,
          [
            call([this.nextSnapIndex], ([value]) => {
              if (value !== this.prevSnapIndex) {
                this.props.onSettle?.(value);
              }
              this.prevSnapIndex = value;
            }),
            // Resetting appropriate values
            set(drawerOldGestureState, GestureState.END),
            set(handleOldGestureState, GestureState.END),
            set(this.prevTranslateYOffset, state.position),
            cond(eq(this.scrollUpAndPullDown, 1), [
              set(
                this.prevTranslateYOffset,
                sub(this.prevTranslateYOffset, this.lastStartScrollY)
              ),
              set(this.lastStartScrollY, 0),
              set(this.scrollUpAndPullDown, 0),
            ]),
            cond(eq(this.destSnapPoint, snapPoints[0]), [
              set(this.dragWithHandle, 0),
            ]),
            set(this.isManuallySetValue, 0),
            set(this.manualYOffset, 0),
            stopClock(clock),
            this.prevTranslateYOffset,
          ],
          // We made the block return the updated position,
          state.position
        ),
      ];
    };

    const translateYOffset = cond(
      isAnimationInterrupted,
      [
        // set(prevTranslateYOffset, animationPosition) should only run if we are
        // interrupting an animation when the drawer is currently in a different
        // position than the top
        cond(
          or(
            this.dragWithHandle,
            greaterOrEq(abs(this.prevDragY), this.lastStartScrollY)
          ),
          set(this.prevTranslateYOffset, this.animationPosition)
        ),
        set(this.animationFinished, 1),
        set(this.translationY, 0),
        // Resetting appropriate values
        set(drawerOldGestureState, GestureState.END),
        set(handleOldGestureState, GestureState.END),
        // By forcing that frameTime exceeds duration, it has the effect of stopping the animation
        set(this.animationFrameTime, add(animationDuration, 1000)),
        set(this.velocityY, 0),
        stopClock(this.animationClock),
        this.prevTranslateYOffset,
      ],
      cond(
        or(
          this.didGestureFinish,
          this.isManuallySetValue,
          clockRunning(this.animationClock)
        ),
        [
          runAnimation({
            clock: this.animationClock,
            from: cond(
              this.isManuallySetValue,
              this.prevTranslateYOffset,
              add(this.prevTranslateYOffset, this.translationY)
            ),
            to: this.destSnapPoint,
            position: this.animationPosition,
            finished: this.animationFinished,
            frameTime: this.animationFrameTime,
            velocity: this.velocityY,
          }),
        ],
        [
          set(this.animationFrameTime, 0),
          set(this.animationFinished, 0),
          // @ts-ignore
          this.prevTranslateYOffset,
        ]
      )
    );

    this.translateY = interpolate(
      add(translateYOffset, this.dragY, multiply(scrollY, -1)),
      {
        inputRange: [openPosition, closedPosition],
        outputRange: [openPosition, closedPosition],
        extrapolate: Extrapolate.CLAMP,
      }
    );

    this.position = interpolate(this.translateY, {
      inputRange: [openPosition, snapPoints[snapPoints.length - 1]],
      outputRange: [1, 0],
      extrapolate: Extrapolate.CLAMP,
    });
  }