fix(Android, Stack): Fix FormSheet - SafeAreaView integration

android/src/main/java/com/swmansion/rnscreens/Screen.kt

@@ -26,6 +26,7 @@ import com.google.android.material.bottomsheet.BottomSheetBehavior
 import com.google.android.material.shape.CornerFamily
 import com.google.android.material.shape.MaterialShapeDrawable
 import com.google.android.material.shape.ShapeAppearanceModel
+import com.swmansion.rnscreens.bottomsheet.BottomSheetMetrics
 import com.swmansion.rnscreens.bottomsheet.isSheetFitToContents
 import com.swmansion.rnscreens.bottomsheet.useSingleDetent
 import com.swmansion.rnscreens.bottomsheet.usesFormSheetPresentation
@@ -142,6 +143,9 @@ class Screen(
         if (usesFormSheetPresentation()) {
             if (isSheetFitToContents()) {
                 sheetBehavior?.useSingleDetent(height)
+                // During the initial call in `onCreateView`, insets are not yet available,
+                // so we need to request an additional layout pass later to account for them.
+                requestLayout()
             }
 
             if (!BuildConfig.IS_NEW_ARCHITECTURE_ENABLED) {
@@ -530,6 +534,11 @@ class Screen(
         }
     }
 
+    fun isOverflowingStatusBar(
+        topInset: Int,
+        metrics: BottomSheetMetrics,
+    ): Boolean = metrics.maxSheetHeight >= metrics.availableHeight - topInset
+
     enum class StackPresentation {
         PUSH,
         MODAL,

android/src/main/java/com/swmansion/rnscreens/bottomsheet/BottomSheetBehaviorExt.kt

@@ -4,36 +4,37 @@ import android.view.View
 import com.google.android.material.bottomsheet.BottomSheetBehavior
 
 internal fun <T : View> BottomSheetBehavior<T>.useSingleDetent(
-    height: Int? = null,
+    maxAllowedHeight: Int? = null,
     forceExpandedState: Boolean = true,
 ): BottomSheetBehavior<T> {
     this.skipCollapsed = true
     this.isFitToContents = true
     if (forceExpandedState) {
         this.state = BottomSheetBehavior.STATE_EXPANDED
     }
-    height?.let {
-        maxHeight = height
+    maxAllowedHeight?.let {
+        maxHeight = maxAllowedHeight
     }
     return this
 }
 
 internal fun <T : View> BottomSheetBehavior<T>.useTwoDetents(
     @BottomSheetBehavior.StableState state: Int? = null,
     firstHeight: Int? = null,
-    secondHeight: Int? = null,
+    maxAllowedHeight: Int? = null,
 ): BottomSheetBehavior<T> {
     skipCollapsed = false
     isFitToContents = true
     state?.let { this.state = state }
     firstHeight?.let { peekHeight = firstHeight }
-    secondHeight?.let { maxHeight = secondHeight }
+    maxAllowedHeight?.let { maxHeight = maxAllowedHeight }
     return this
 }
 
 internal fun <T : View> BottomSheetBehavior<T>.useThreeDetents(
     @BottomSheetBehavior.StableState state: Int? = null,
     firstHeight: Int? = null,
+    maxAllowedHeight: Int? = null,
     halfExpandedRatio: Float? = null,
     expandedOffsetFromTop: Int? = null,
 ): BottomSheetBehavior<T> {
@@ -43,5 +44,6 @@ internal fun <T : View> BottomSheetBehavior<T>.useThreeDetents(
     firstHeight?.let { this.peekHeight = firstHeight }
     halfExpandedRatio?.let { this.halfExpandedRatio = halfExpandedRatio }
     expandedOffsetFromTop?.let { this.expandedOffset = expandedOffsetFromTop }
+    maxAllowedHeight?.let { maxHeight = maxAllowedHeight }
     return this
 }

android/src/main/java/com/swmansion/rnscreens/bottomsheet/BottomSheetMetrics.kt

@@ -0,0 +1,33 @@
+package com.swmansion.rnscreens.bottomsheet
+
+import com.swmansion.rnscreens.Screen
+
+data class BottomSheetMetrics(
+    val availableHeight: Int,
+    val maxDetent: Double,
+    val maxSheetHeight: Int,
+)
+
+fun getSheetMetrics(
+    screen: Screen,
+    availableHeight: Int,
+    sheetHeight: Int,
+): BottomSheetMetrics {
+    require(screen.usesFormSheetPresentation()) {
+        "[RNScreens] Expected screen to use form sheet presentation"
+    }
+
+    val maxDetent = screen.sheetDetents.lastOrNull() ?: 1.0
+
+    val maxSheetHeight =
+        when {
+            screen.isSheetFitToContents() -> sheetHeight
+            else -> (availableHeight * maxDetent).toInt()
+        }
+
+    return BottomSheetMetrics(
+        availableHeight = availableHeight,
+        maxDetent = maxDetent,
+        maxSheetHeight = maxSheetHeight,
+    )
+}

android/src/main/java/com/swmansion/rnscreens/bottomsheet/SheetDelegate.kt

@@ -154,7 +154,7 @@ class SheetDelegate(
                                 } else {
                                     (screen.sheetDetents.first() * containerHeight).toInt()
                                 }
-                            useSingleDetent(height = height)
+                            useSingleDetent(maxAllowedHeight = height)
                         }
 
                     2 ->
@@ -165,7 +165,7 @@ class SheetDelegate(
                                     screen.sheetDetents.count(),
                                 ),
                             firstHeight = (screen.sheetDetents[0] * containerHeight).toInt(),
-                            secondHeight = (screen.sheetDetents[1] * containerHeight).toInt(),
+                            maxAllowedHeight = (screen.sheetDetents.last() * containerHeight).toInt(),
                         )
 
                     3 ->
@@ -176,6 +176,7 @@ class SheetDelegate(
                                     screen.sheetDetents.count(),
                                 ),
                             firstHeight = (screen.sheetDetents[0] * containerHeight).toInt(),
+                            maxAllowedHeight = (screen.sheetDetents.last() * containerHeight).toInt(),
                             halfExpandedRatio = (screen.sheetDetents[1] / screen.sheetDetents[2]).toFloat(),
                             expandedOffsetFromTop = ((1 - screen.sheetDetents[2]) * containerHeight).toInt(),
                         )
@@ -246,20 +247,21 @@ class SheetDelegate(
                                         }
                                     }
                                 } else {
-                                    (screen.sheetDetents.first() * containerHeight).toInt()
+                                    (screen.sheetDetents.last() * containerHeight).toInt()
                                 }
-                            useSingleDetent(height = height, forceExpandedState = false)
+                            useSingleDetent(maxAllowedHeight = height, forceExpandedState = false)
                         }
 
                     2 ->
                         behavior.useTwoDetents(
                             firstHeight = (screen.sheetDetents[0] * containerHeight).toInt(),
-                            secondHeight = (screen.sheetDetents[1] * containerHeight).toInt(),
+                            maxAllowedHeight = (screen.sheetDetents.last() * containerHeight).toInt(),
                         )
 
                     3 ->
                         behavior.useThreeDetents(
                             firstHeight = (screen.sheetDetents[0] * containerHeight).toInt(),
+                            maxAllowedHeight = (screen.sheetDetents.last() * containerHeight).toInt(),
                             halfExpandedRatio = (screen.sheetDetents[1] / screen.sheetDetents[2]).toFloat(),
                             expandedOffsetFromTop = ((1 - screen.sheetDetents[2]) * containerHeight).toInt(),
                         )
@@ -309,26 +311,14 @@ class SheetDelegate(
     ): WindowInsetsCompat {
         val isImeVisible = insets.isVisible(WindowInsetsCompat.Type.ime())
         val imeInset = insets.getInsets(WindowInsetsCompat.Type.ime())
+        val prevInsets = insets.getInsets(WindowInsetsCompat.Type.systemBars())
 
         if (isImeVisible) {
             isKeyboardVisible = true
             keyboardState = KeyboardVisible(imeInset.bottom)
             sheetBehavior?.let {
                 this.configureBottomSheetBehaviour(it, keyboardState)
             }
-
-            val prevInsets = insets.getInsets(WindowInsetsCompat.Type.navigationBars())
-            return WindowInsetsCompat
-                .Builder(insets)
-                .setInsets(
-                    WindowInsetsCompat.Type.navigationBars(),
-                    Insets.of(
-                        prevInsets.left,
-                        prevInsets.top,
-                        prevInsets.right,
-                        0,
-                    ),
-                ).build()
         } else {
             sheetBehavior?.let {
                 if (isKeyboardVisible) {
@@ -342,12 +332,30 @@ class SheetDelegate(
             isKeyboardVisible = false
         }
 
-        val prevInsets = insets.getInsets(WindowInsetsCompat.Type.navigationBars())
+        // We're taking the metrics of the rootView, not screen to support nested navigators
+        val availableHeight = screen.rootView.height
+
+        val metrics =
+            getSheetMetrics(
+                screen = screen,
+                availableHeight = availableHeight,
+                sheetHeight = screen.height,
+            )
+
+        val newTopInset =
+            if (screen.isOverflowingStatusBar(prevInsets.top, metrics) && !isImeVisible) {
+                prevInsets.top - (metrics.availableHeight - metrics.maxSheetHeight)
+            } else {
+                0
+            }
+
+        val newBottomInset = if (!isImeVisible) prevInsets.bottom else 0
+
         return WindowInsetsCompat
             .Builder(insets)
             .setInsets(
-                WindowInsetsCompat.Type.navigationBars(),
-                Insets.of(prevInsets.left, prevInsets.top, prevInsets.right, 0),
+                WindowInsetsCompat.Type.systemBars(),
+                Insets.of(prevInsets.left, newTopInset, prevInsets.right, newBottomInset),
             ).build()
     }