simplify logic

modules/bottom-sheet/index.ts

@@ -1,4 +1,13 @@
-import {BottomSheetState, BottomSheetViewProps} from './src/BottomSheet.types'
+import {
+  BottomSheetSnapPoint,
+  BottomSheetState,
+  BottomSheetViewProps,
+} from './src/BottomSheet.types'
 import {BottomSheetView} from './src/BottomSheetView'
 
-export {type BottomSheetState, BottomSheetView, type BottomSheetViewProps}
+export {
+  BottomSheetSnapPoint,
+  type BottomSheetState,
+  BottomSheetView,
+  type BottomSheetViewProps,
+}

modules/bottom-sheet/ios/SheetView.swift

@@ -52,6 +52,22 @@ class SheetView: ExpoView, UISheetPresentationControllerDelegate {
       }
     }
   }
+  private var selectedDetentIdentifier: UISheetPresentationController.Detent.Identifier? {
+    didSet {
+      guard let selectedDetentIdentifier else {
+        return
+      }
+      if selectedDetentIdentifier == .large {
+        onSnapPointChange([
+          "snapPoint": 2
+        ])
+      } else {
+        onSnapPointChange([
+          "snapPoint": 1
+        ])
+      }
+    }
+  }
 
   // MARK: - Lifecycle
 
@@ -104,11 +120,12 @@ class SheetView: ExpoView, UISheetPresentationControllerDelegate {
     }
 
     let sheetVc = SheetViewController()
+    sheetVc.setDetents(contentHeight: self.clampHeight(contentHeight), preventExpansion: self.preventExpansion)
     if let sheet = sheetVc.sheetPresentationController {
       sheet.delegate = self
       sheet.preferredCornerRadius = self.cornerRadius
+      self.selectedDetentIdentifier = sheet.selectedDetentIdentifier
     }
-    sheetVc.setDetents(contentHeight: self.clampHeight(contentHeight), preventExpansion: self.preventExpansion)
     sheetVc.view.addSubview(innerView)
 
     self.sheetVc = sheetVc
@@ -161,16 +178,6 @@ class SheetView: ExpoView, UISheetPresentationControllerDelegate {
   }
   
   func sheetPresentationControllerDidChangeSelectedDetentIdentifier(_ sheetPresentationController: UISheetPresentationController) {
-    let identifier = sheetPresentationController.selectedDetentIdentifier
-    
-    if identifier == .large {
-      onSnapPointChange([
-        "snapPoint": 2,
-      ])
-    } else {
-      onSnapPointChange([
-        "snapPoint": 1,
-      ])
-    }
+    self.selectedDetentIdentifier = sheetPresentationController.selectedDetentIdentifier
   }
 }

modules/bottom-sheet/src/BottomSheet.types.ts

@@ -3,6 +3,12 @@ import {ColorValue, NativeSyntheticEvent} from 'react-native'
 
 export type BottomSheetState = 'closed' | 'closing' | 'open' | 'opening'
 
+export enum BottomSheetSnapPoint {
+  Hidden,
+  Partial,
+  Full,
+}
+
 export interface BottomSheetViewProps {
   children: React.ReactNode
   cornerRadius?: number
@@ -15,8 +21,11 @@ export interface BottomSheetViewProps {
   minHeight?: number
   maxHeight?: number
 
+  onAttemptDismiss?: (event: NativeSyntheticEvent<object>) => void
+  onSnapPointChange?: (
+    event: NativeSyntheticEvent<{snapPoint: BottomSheetSnapPoint}>,
+  ) => void
   onStateChange?: (
     event: NativeSyntheticEvent<{state: BottomSheetState}>,
   ) => void
-  onAttemptDismiss?: (event: NativeSyntheticEvent<object>) => void
 }

src/components/Dialog/context.ts

@@ -6,10 +6,12 @@ import {
   DialogControlRefProps,
   DialogOuterProps,
 } from '#/components/Dialog/types'
+import {BottomSheetSnapPoint} from '../../../modules/bottom-sheet/src/BottomSheet.types'
 
 export const Context = React.createContext<DialogContextProps>({
   close: () => {},
   insideDialog: false,
+  snapPoint: BottomSheetSnapPoint.Hidden,
 })
 
 export function useDialogContext() {

src/components/Dialog/index.tsx

@@ -8,7 +8,7 @@ import {isIOS} from '#/platform/detection'
 import {useDialogStateControlContext} from '#/state/dialogs'
 import {List, ListMethods, ListProps} from '#/view/com/util/List'
 import {atoms as a, flatten, useTheme} from '#/alf'
-import {Context} from '#/components/Dialog/context'
+import {Context, useDialogContext} from '#/components/Dialog/context'
 import {
   DialogControlProps,
   DialogInnerProps,
@@ -16,7 +16,10 @@ import {
 } from '#/components/Dialog/types'
 import {createInput} from '#/components/forms/TextField'
 import {Portal} from '#/components/Portal'
-import {BottomSheetView} from '../../../modules/bottom-sheet'
+import {
+  BottomSheetSnapPoint,
+  BottomSheetView,
+} from '../../../modules/bottom-sheet'
 
 export {useDialogContext, useDialogControl} from '#/components/Dialog/context'
 export * from '#/components/Dialog/types'
@@ -57,6 +60,10 @@ export function OuterWithoutPortal({
   const closeCallbacks = React.useRef<(() => void)[]>([])
   const {setDialogIsOpen} = useDialogStateControlContext()
 
+  const [snapPoint, setSnapPoint] = React.useState<BottomSheetSnapPoint>(
+    BottomSheetSnapPoint.Partial,
+  )
+
   const callQueuedCallbacks = React.useCallback(() => {
     for (const cb of closeCallbacks.current) {
       try {
@@ -103,7 +110,10 @@ export function OuterWithoutPortal({
     [open, close],
   )
 
-  const context = React.useMemo(() => ({close, insideDialog: true}), [close])
+  const context = React.useMemo(
+    () => ({close, insideDialog: true, snapPoint}),
+    [close, snapPoint],
+  )
 
   const Wrapper = isIOS ? View : GestureHandlerRootView
 
@@ -113,6 +123,10 @@ export function OuterWithoutPortal({
         ref={ref}
         topInset={30}
         bottomInset={insets.bottom}
+        onSnapPointChange={e => {
+          console.log(e.nativeEvent)
+          setSnapPoint(e.nativeEvent.snapPoint)
+        }}
         onStateChange={e => {
           if (e.nativeEvent.state === 'closed') {
             onCloseAnimationComplete()
@@ -147,8 +161,12 @@ export function Inner({children, style}: DialogInnerProps) {
 export const ScrollableInner = React.forwardRef<ScrollView, DialogInnerProps>(
   function ScrollableInner({children, style}, ref) {
     const insets = useSafeAreaInsets()
+    const {snapPoint} = useDialogContext()
     return (
-      <ScrollView style={[a.px_xl, style]} ref={ref}>
+      <ScrollView
+        style={[a.px_xl, style]}
+        ref={ref}
+        bounces={snapPoint === BottomSheetSnapPoint.Full}>
         {children}
         <View style={{height: insets.bottom + a.pt_5xl.paddingTop}} />
       </ScrollView>

src/components/Dialog/types.ts

@@ -7,6 +7,7 @@ import type {
 
 import {ViewStyleProp} from '#/alf'
 import {BottomSheetViewProps} from '../../../modules/bottom-sheet'
+import {BottomSheetSnapPoint} from '../../../modules/bottom-sheet/src/BottomSheet.types'
 
 type A11yProps = Required<AccessibilityProps>
 
@@ -38,6 +39,7 @@ export type DialogControlProps = DialogControlRefProps & {
 export type DialogContextProps = {
   close: DialogControlProps['close']
   insideDialog: boolean
+  snapPoint: BottomSheetSnapPoint
 }
 
 export type DialogControlOpenOptions = {