feat: change logic for nested stacks

Author: WoLewicki

android/src/main/java/com/swmansion/rnscreens/ScreenFragment.java

@@ -68,13 +68,15 @@ public Screen getScreen() {
 
   public void onContainerUpdate() {
     ScreenStackHeaderConfig config = findHeaderConfig();
-    if (config != null && config.getScreenFragment().getActivity() != null) {
+    boolean configInChild = checkIfChildWithConfig(getScreen());
+    if (!configInChild && config != null && config.getScreenFragment().getActivity() != null) {
+      // if there is no child with config, we look for a parent with config to set the orientation
       config.getScreenFragment().getActivity().setRequestedOrientation(config.getScreenOrientation());
     }
   }
 
   private ScreenStackHeaderConfig findHeaderConfig() {
-    ViewParent parent = getScreen();
+    ViewParent parent = getScreen().getContainer();
     while (parent != null) {
       if (parent instanceof Screen) {
         for (int i = 0; i < ((Screen) parent).getChildCount(); i++) {
@@ -89,6 +91,22 @@ private ScreenStackHeaderConfig findHeaderConfig() {
     return null;
   }
 
+  protected static boolean checkIfChildWithConfig(View view) {
+    if (view instanceof ViewGroup) {
+      for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {
+        View child = ((ViewGroup) view).getChildAt(i);
+        if (child instanceof ScreenStackHeaderConfig) {
+          return true;
+        } else {
+          if (checkIfChildWithConfig(child)) {
+            return true;
+          }
+        }
+      }
+    }
+    return false;
+  }
+
   protected void dispatchOnWillAppear() {
     ((ReactContext) mScreenView.getContext())
         .getNativeModule(UIManagerModule.class)

android/src/main/java/com/swmansion/rnscreens/ScreenStackHeaderConfig.java

@@ -172,7 +172,10 @@ public void onUpdate() {
     }
 
     // orientation
-    activity.setRequestedOrientation(mScreenOrientation);
+    if (!ScreenFragment.checkIfChildWithConfig(getScreen() != null ? getScreen().getChildAt(1) : null)) {
+      // we check if there is no child that provides config, since then we shouldn't change orientation here (child with index 0 is this header config)
+      activity.setRequestedOrientation(mScreenOrientation);
+    }
 
     if (mIsHidden) {
       if (mToolbar.getParent() != null) {