refactor(Android, FormSheet v5): Introduce invalidation flags for updates

android/src/main/java/com/swmansion/rnscreens/gamma/modals/formsheet/FormSheetDialogManager.kt

@@ -15,7 +15,7 @@ class FormSheetDialogManager(
 ) {
     private var formSheetConfig = FormSheetConfig()
 
-    private var resolvedDetents: FormSheetDetents? = null
+    internal val invalidationFlags = FormSheetInvalidationFlags()
 
     private val themedContext =
         ContextThemeWrapper(
@@ -89,29 +89,57 @@ class FormSheetDialogManager(
 
     internal fun applyConfig(newConfig: FormSheetConfig) {
         if (formSheetConfig.isOpen != newConfig.isOpen) {
-            presentationManager.updatePresentationState(newConfig.isOpen)
+            invalidationFlags.isPresentationInvalidated = true
+            if (newConfig.isOpen) {
+                // ALWAYS refresh the sheet configuration when reopening to ensure that BottomSheet
+                // state and layout are synchronized with native behavior.
+                invalidationFlags.isAppearanceInvalidated = true
+                invalidationFlags.isBehaviorInvalidated = true
+            }
         }
 
         if (formSheetConfig.prefersGrabberVisible != newConfig.prefersGrabberVisible) {
-            container.setGrabberVisible(newConfig.prefersGrabberVisible)
+            invalidationFlags.isAppearanceInvalidated = true
         }
 
-        // TODO: @t0maboro
-        // - invalidation flags logic should be implemented following other components convention
-        val isOpening = newConfig.isOpen && !formSheetConfig.isOpen
-        val detentsChanged = resolvedDetents == null || formSheetConfig.detents != newConfig.detents
+        if (formSheetConfig.detents != newConfig.detents) {
+            invalidationFlags.isBehaviorInvalidated = true
+        }
+
+        formSheetConfig = newConfig
+
+        flushPendingUpdates()
+    }
+
+    private fun flushPendingUpdates() {
+        if (!invalidationFlags.any()) return
 
-        if (detentsChanged) {
-            resolvedDetents = resolveDetents(newConfig.detents)
+        if (invalidationFlags.isBehaviorInvalidated) {
+            invalidationFlags.isBehaviorInvalidated = false
+            updateSheetBehavior()
         }
 
-        if (detentsChanged || isOpening) {
-            dimensionsCoordinator.updateFormSheetDetents(
-                detents = resolvedDetents,
-            )
+        if (invalidationFlags.isAppearanceInvalidated) {
+            invalidationFlags.isAppearanceInvalidated = false
+            updateSheetAppearance()
         }
 
-        formSheetConfig = newConfig
+        if (invalidationFlags.isPresentationInvalidated) {
+            invalidationFlags.isPresentationInvalidated = false
+            updateSheetPresentation()
+        }
+    }
+
+    private fun updateSheetBehavior() {
+        dimensionsCoordinator.updateFormSheetDetents(resolveDetents(formSheetConfig.detents))
+    }
+
+    private fun updateSheetAppearance() {
+        container.setGrabberVisible(formSheetConfig.prefersGrabberVisible)
+    }
+
+    private fun updateSheetPresentation() {
+        presentationManager.updatePresentationState(formSheetConfig.isOpen)
     }
 
     private fun resolveDetents(rawDetents: List<Double>): FormSheetDetents {

android/src/main/java/com/swmansion/rnscreens/gamma/modals/formsheet/FormSheetInvalidationFlags.kt

@@ -0,0 +1,10 @@
+package com.swmansion.rnscreens.gamma.modals.formsheet
+
+internal class FormSheetInvalidationFlags(
+    var isPresentationInvalidated: Boolean = false,
+    var isAppearanceInvalidated: Boolean = false,
+    var isBehaviorInvalidated: Boolean = false,
+) {
+    internal fun any(): Boolean =
+        isPresentationInvalidated || isAppearanceInvalidated || isBehaviorInvalidated
+}