feat: allow modify animation configs

example/src/screens/modal/SimpleExample.tsx

@@ -1,13 +1,17 @@
-import React, { useCallback, useRef } from 'react';
+import React, { useCallback, useMemo, useRef } from 'react';
 import { View, StyleSheet } from 'react-native';
 import { BottomSheetModal } from '@gorhom/bottom-sheet';
 import Button from '../../components/button';
 import ContactListContainer from '../../components/contactListContainer';
 import withModalProvider from '../withModalProvider';
 
 const SimpleExample = () => {
+  // refs
   const bottomSheetRef = useRef<BottomSheetModal>(null);
 
+  // variables
+  const snapPoints = useMemo(() => ['25%', '50%'], []);
+
   // callbacks
   const handleChange = useCallback((index: number) => {
     // eslint-disable-next-line no-console
@@ -55,7 +59,7 @@ const SimpleExample = () => {
       />
       <BottomSheetModal
         ref={bottomSheetRef}
-        snapPoints={['25%', '50%']}
+        snapPoints={snapPoints}
         animationDuration={250}
         onDismiss={handleDismiss}
         onChange={handleChange}

src/components/bottomSheet/BottomSheet.tsx

@@ -22,7 +22,6 @@ import Animated, {
   Extrapolate,
   runOnUI,
   useWorkletCallback,
-  withTiming,
 } from 'react-native-reanimated';
 import { State } from 'react-native-gesture-handler';
 import {
@@ -42,7 +41,13 @@ import BottomSheetHandleContainer from '../bottomSheetHandleContainer';
 import BottomSheetBackgroundContainer from '../bottomSheetBackgroundContainer';
 import BottomSheetDraggableView from '../bottomSheetDraggableView';
 // import BottomSheetDebugView from '../bottomSheetDebugView';
-import { GESTURE, ANIMATION_STATE, WINDOW_HEIGHT } from '../../constants';
+import {
+  GESTURE,
+  ANIMATION_STATE,
+  WINDOW_HEIGHT,
+  ANIMATION_METHOD,
+} from '../../constants';
+import { animate } from '../../utilities';
 import {
   DEFAULT_ANIMATION_EASING,
   DEFAULT_ANIMATION_DURATION,
@@ -74,8 +79,8 @@ const BottomSheetComponent = forwardRef<BottomSheet, BottomSheetProps>(
     //#region extract props
     const {
       // animations configurations
-      animationDuration = DEFAULT_ANIMATION_DURATION,
-      animationEasing = DEFAULT_ANIMATION_EASING,
+      animationDuration: _providedAnimationDuration = DEFAULT_ANIMATION_DURATION,
+      animationEasing: _providedAnimationEasing = DEFAULT_ANIMATION_EASING,
       animationConfigs: _providedAnimationConfigs,
 
       // configurations
@@ -289,39 +294,52 @@ const BottomSheetComponent = forwardRef<BottomSheet, BottomSheetProps>(
       animationState.value = ANIMATION_STATE.STOPPED;
     }, [animatedIndex, animationState, handleOnChange, refreshUIElements]);
     const animateToPoint = useWorkletCallback(
-      (point: number, velocity: number = 0) => {
+      (
+        point: number,
+        velocity: number = 0,
+        animationDuration?: number,
+        animationEasing?: Animated.EasingFunction
+      ) => {
         animationState.value = ANIMATION_STATE.RUNNING;
         runOnJS(handleOnAnimate)(point);
 
-        if (_providedAnimationConfigs) {
+        /**
+         * force animation configs from parameters, if provided
+         */
+        if (animationDuration !== undefined) {
+          animatedPosition.value = animate(ANIMATION_METHOD.TIMING, {
+            duration: animationDuration,
+            easing: animationEasing
+              ? animationEasing
+              : DEFAULT_ANIMATION_EASING,
+          })(point, velocity, animateToPointCompleted);
+        } else if (_providedAnimationConfigs) {
+          /**
+           * use animationConfigs callback, if provided
+           */
           animatedPosition.value = _providedAnimationConfigs(
             point,
             velocity,
             animateToPointCompleted
           );
-          return;
+        } else {
+          /**
+           * @deprecated this will be removed in next major release.
+           */
+          animatedPosition.value = animate(ANIMATION_METHOD.TIMING, {
+            duration: _providedAnimationDuration,
+            easing: _providedAnimationEasing,
+          })(point, velocity, animateToPointCompleted);
         }
-
-        /**
-         * @deprecated this will be removed in next major release.
-         */
-        animatedPosition.value = withTiming(
-          point,
-          {
-            duration: animationDuration,
-            easing: animationEasing,
-          },
-          animateToPointCompleted
-        );
       },
       [
-        _providedAnimationConfigs,
         animationState,
         animatedPosition,
-        animationDuration,
-        animationEasing,
         animateToPointCompleted,
         handleOnAnimate,
+        _providedAnimationConfigs,
+        _providedAnimationDuration,
+        _providedAnimationEasing,
       ]
     );
 
@@ -368,7 +386,7 @@ const BottomSheetComponent = forwardRef<BottomSheet, BottomSheetProps>(
 
     //#region public methods
     const handleSnapTo = useCallback(
-      (index: number) => {
+      (index: number, ...args) => {
         invariant(
           index >= -1 && index <= snapPoints.length - 1,
           `'index' was provided but out of the provided snap points range! expected value to be between -1, ${
@@ -379,31 +397,40 @@ const BottomSheetComponent = forwardRef<BottomSheet, BottomSheetProps>(
           return;
         }
         const newSnapPoint = snapPoints[index];
-        runOnUI(animateToPoint)(newSnapPoint);
+        runOnUI(animateToPoint)(newSnapPoint, 0, ...args);
+      },
+      [animateToPoint, snapPoints]
+    );
+    const handleClose = useCallback(
+      (...args) => {
+        if (isClosing.current) {
+          return;
+        }
+        isClosing.current = true;
+        runOnUI(animateToPoint)(safeContainerHeight, 0, ...args);
+      },
+      [animateToPoint, safeContainerHeight]
+    );
+    const handleExpand = useCallback(
+      (...args) => {
+        if (isClosing.current) {
+          return;
+        }
+        const newSnapPoint = snapPoints[snapPoints.length - 1];
+        runOnUI(animateToPoint)(newSnapPoint, 0, ...args);
+      },
+      [animateToPoint, snapPoints]
+    );
+    const handleCollapse = useCallback(
+      (...args) => {
+        if (isClosing.current) {
+          return;
+        }
+        const newSnapPoint = snapPoints[0];
+        runOnUI(animateToPoint)(newSnapPoint, 0, ...args);
       },
       [animateToPoint, snapPoints]
     );
-    const handleClose = useCallback(() => {
-      if (isClosing.current) {
-        return;
-      }
-      isClosing.current = true;
-      runOnUI(animateToPoint)(safeContainerHeight);
-    }, [animateToPoint, safeContainerHeight]);
-    const handleExpand = useCallback(() => {
-      if (isClosing.current) {
-        return;
-      }
-      const newSnapPoint = snapPoints[snapPoints.length - 1];
-      runOnUI(animateToPoint)(newSnapPoint);
-    }, [animateToPoint, snapPoints]);
-    const handleCollapse = useCallback(() => {
-      if (isClosing.current) {
-        return;
-      }
-      const newSnapPoint = snapPoints[0];
-      runOnUI(animateToPoint)(newSnapPoint);
-    }, [animateToPoint, snapPoints]);
     useImperativeHandle(ref, () => ({
       snapTo: handleSnapTo,
       expand: handleExpand,
@@ -512,7 +539,8 @@ const BottomSheetComponent = forwardRef<BottomSheet, BottomSheetProps>(
         isLayoutCalculated &&
         didMountOnAnimate.current === false &&
         isClosing.current === false &&
-        snapPoints[_providedIndex] !== safeContainerHeight
+        snapPoints[_providedIndex] !== safeContainerHeight &&
+        _providedIndex !== -1
       ) {
         const newSnapPoint = snapPoints[_providedIndex];
         requestAnimationFrame(() => runOnUI(animateToPoint)(newSnapPoint));

src/components/bottomSheetModal/BottomSheetModal.tsx

@@ -87,7 +87,8 @@ const BottomSheetModalComponent = forwardRef<
     forcedDismissed.current = false;
   }, []);
   const adjustIndex = useCallback(
-    (_index: number) => (dismissOnPanDown ? _index - 1 : _index),
+    (_index: number, internal = true) =>
+      dismissOnPanDown ? (internal ? _index - 1 : _index + 1) : _index,
     [dismissOnPanDown]
   );
   const unmount = useCallback(() => {
@@ -113,34 +114,40 @@ const BottomSheetModalComponent = forwardRef<
   //#endregion
 
   //#region bottom sheet methods
-  const handleSnapTo = useCallback(() => {
-    if (minimized.current) {
-      return;
-    }
+  const handleSnapTo = useCallback(
+    (_index: number, ...args) => {
+      if (minimized.current) {
+        return;
+      }
 
-    bottomSheetRef.current?.snapTo(adjustIndex(currentIndexRef.current));
-  }, [adjustIndex]);
-  const handleExpand = useCallback(() => {
+      bottomSheetRef.current?.snapTo(adjustIndex(_index, false), ...args);
+    },
+    [adjustIndex]
+  );
+  const handleExpand = useCallback((...args) => {
     if (minimized.current) {
       return;
     }
-    bottomSheetRef.current?.expand();
+    bottomSheetRef.current?.expand(...args);
   }, []);
-  const handleCollapse = useCallback(() => {
-    if (minimized.current) {
-      return;
-    }
-    if (dismissOnPanDown) {
-      bottomSheetRef.current?.snapTo(1);
-    } else {
-      bottomSheetRef.current?.collapse();
-    }
-  }, [dismissOnPanDown]);
-  const handleClose = useCallback(() => {
+  const handleCollapse = useCallback(
+    (...args) => {
+      if (minimized.current) {
+        return;
+      }
+      if (dismissOnPanDown) {
+        bottomSheetRef.current?.snapTo(1, ...args);
+      } else {
+        bottomSheetRef.current?.collapse(...args);
+      }
+    },
+    [dismissOnPanDown]
+  );
+  const handleClose = useCallback((...args) => {
     if (minimized.current) {
       return;
     }
-    bottomSheetRef.current?.close();
+    bottomSheetRef.current?.close(...args);
   }, []);
   //#endregion
 
@@ -151,22 +158,25 @@ const BottomSheetModalComponent = forwardRef<
       mountSheet(key, ref, stackBehavior);
     });
   }, [key, stackBehavior, ref, mountSheet]);
-  const handleDismiss = useCallback(() => {
-    /**
-     * if modal is already been dismiss, we exit the method.
-     */
-    if (currentIndexRef.current === -1 && minimized.current === false) {
-      return;
-    }
+  const handleDismiss = useCallback(
+    (...args) => {
+      /**
+       * if modal is already been dismiss, we exit the method.
+       */
+      if (currentIndexRef.current === -1 && minimized.current === false) {
+        return;
+      }
 
-    if (minimized.current) {
-      unmount();
-      return;
-    }
-    willUnmountSheet(key);
-    forcedDismissed.current = true;
-    bottomSheetRef.current?.close();
-  }, [willUnmountSheet, unmount, key]);
+      if (minimized.current) {
+        unmount();
+        return;
+      }
+      willUnmountSheet(key);
+      forcedDismissed.current = true;
+      bottomSheetRef.current?.close(...args);
+    },
+    [willUnmountSheet, unmount, key]
+  );
   const handleMinimize = useCallback(() => {
     if (minimized.current) {
       return;

src/constants.ts

@@ -14,6 +14,11 @@ enum ANIMATION_STATE {
   STOPPED,
 }
 
+enum ANIMATION_METHOD {
+  TIMING,
+  SPRING,
+}
+
 const MODAL_STACK_BEHAVIOR = {
   replace: 'replace',
   push: 'push',
@@ -24,5 +29,6 @@ export {
   WINDOW_WIDTH,
   GESTURE,
   ANIMATION_STATE,
+  ANIMATION_METHOD,
   MODAL_STACK_BEHAVIOR,
 };

src/hooks/useBottomSheetSpringConfigs.ts

@@ -1,18 +1,13 @@
-import Animated, {
-  useWorkletCallback,
-  withSpring,
-} from 'react-native-reanimated';
+import Animated from 'react-native-reanimated';
+import { ANIMATION_METHOD } from '../constants';
+import { animate } from '../utilities';
 
+/**
+ * Generate spring animation configs.
+ * @param configs overridable configs.
+ */
 export const useBottomSheetSpringConfigs = (
   configs: Omit<Animated.WithSpringConfig, 'velocity'>
 ) => {
-  const animationConfig = useWorkletCallback(
-    (point: number, velocity: number = 0, callback: () => void) => {
-      // @ts-ignore override velocity
-      configs.velocity = velocity;
-      return withSpring(point, configs, callback);
-    },
-    [configs]
-  );
-  return animationConfig;
+  return animate(ANIMATION_METHOD.SPRING, configs);
 };