Update ViewGroupManager interface to use index for remove method.

Differential Revision: D2610700

fb-gh-sync-id: b59dfc581d9ca8d29203b5915fb743f3270989ab

ReactAndroid/src/main/java/com/facebook/react/uimanager/NativeViewHierarchyManager.java

@@ -310,19 +310,7 @@ import com.facebook.react.touch.JSResponderHandler;
                       viewsToAdd,
                       tagsToDelete));
         }
-        View childView = viewManager.getChildAt(viewToManage, indicesToRemove[i]);
-        if (childView == null) {
-          throw new IllegalViewOperationException(
-              "Trying to remove a null view at index:"
-                  + indexToRemove + " view tag: " + tag + "\n detail: " +
-                  constructManageChildrenErrorMessage(
-                      viewToManage,
-                      viewManager,
-                      indicesToRemove,
-                      viewsToAdd,
-                      tagsToDelete));
-        }
-        viewManager.removeView(viewToManage, childView);
+        viewManager.removeViewAt(viewToManage, indicesToRemove[i]);
         lastIndexToRemove = indexToRemove;
       }
     }

ReactAndroid/src/main/java/com/facebook/react/uimanager/ViewGroupManager.java

@@ -44,8 +44,8 @@ public abstract class ViewGroupManager <T extends ViewGroup>
     return parent.getChildAt(index);
   }
 
-  public void removeView(T parent, View child) {
-    parent.removeView(child);
+  public void removeViewAt(T parent, int index) {
+    parent.removeViewAt(index);
   }
 
   /**

ReactAndroid/src/main/java/com/facebook/react/views/recyclerview/RecyclerViewBackedScrollView.java

@@ -169,8 +169,10 @@ public class RecyclerViewBackedScrollView extends RecyclerView {
       notifyDataSetChanged();
     }
 
-    public void removeView(View child) {
-      if (mViews.remove(child)) {
+    public void removeViewAt(int index) {
+      View child = mViews.get(index);
+      if (child != null) {
+        mViews.remove(index);
         mTopOffsetsFromLayout.remove(child);
         child.removeOnLayoutChangeListener(mChildLayoutChangeListener);
         mTotalChildrenHeight -= child.getMeasuredHeight();
@@ -271,8 +273,8 @@ public class RecyclerViewBackedScrollView extends RecyclerView {
     ((ReactListAdapter) getAdapter()).addView(child, index);
   }
 
-  /*package*/ void removeViewFromAdapter(View child) {
-    ((ReactListAdapter) getAdapter()).removeView(child);
+  /*package*/ void removeViewFromAdapter(int index) {
+    ((ReactListAdapter) getAdapter()).removeViewAt(index);
   }
 
   /*package*/ View getChildAtFromAdapter(int index) {

ReactAndroid/src/main/java/com/facebook/react/views/recyclerview/RecyclerViewBackedScrollViewManager.java

@@ -48,8 +48,8 @@ public class RecyclerViewBackedScrollViewManager extends
   }
 
   @Override
-  public void removeView(RecyclerViewBackedScrollView parent, View child) {
-    parent.removeViewFromAdapter(child);
+  public void removeViewAt(RecyclerViewBackedScrollView parent, int index) {
+    parent.removeViewFromAdapter(index);
   }
 
   /**

ReactAndroid/src/main/java/com/facebook/react/views/view/ReactViewManager.java

@@ -195,16 +195,16 @@ public class ReactViewManager extends ViewGroupManager<ReactViewGroup> {
   }
 
   @Override
-  public void removeView(ReactViewGroup parent, View child) {
+  public void removeViewAt(ReactViewGroup parent, int index) {
     boolean removeClippedSubviews = parent.getRemoveClippedSubviews();
     if (removeClippedSubviews) {
+      View child = getChildAt(parent, index);
       if (child.getParent() != null) {
         parent.removeView(child);
       }
       parent.removeViewWithSubviewClippingEnabled(child);
     } else {
-      parent.removeView(child);
+      parent.removeViewAt(index);
     }
   }
-
 }

ReactAndroid/src/main/java/com/facebook/react/views/viewpager/ReactViewPager.java

@@ -49,6 +49,19 @@ import com.facebook.react.uimanager.events.NativeGestureUtil;
       setOffscreenPageLimit(mViews.size());
     }
 
+    void removeViewAt(int index) {
+      mViews.remove(index);
+      notifyDataSetChanged();
+
+      // TODO(7323049): Remove this workaround once we figure out a way to re-layout some views on
+      // request
+      setOffscreenPageLimit(mViews.size());
+    }
+
+    View getViewAt(int index) {
+      return mViews.get(index);
+    }
+
     @Override
     public int getCount() {
       return mViews.size();
@@ -120,11 +133,23 @@ import com.facebook.react.uimanager.events.NativeGestureUtil;
     return false;
   }
 
-  /* package */ void addViewToAdapter(View child, int index) {
+  /*package*/ void addViewToAdapter(View child, int index) {
     getAdapter().addView(child, index);
   }
 
-  /* package */ void setCurrentItemFromJs(int item) {
+  /*package*/ void removeViewFromAdapter(int index) {
+    getAdapter().removeViewAt(index);
+  }
+
+  /*package*/ int getViewCountInAdapter() {
+    return getAdapter().getCount();
+  }
+
+  /*package*/ View getViewFromAdapter(int index) {
+    return getAdapter().getViewAt(index);
+  }
+
+  /*package*/ void setCurrentItemFromJs(int item) {
     mIsCurrentItemFromJs = true;
     setCurrentItem(item);
     mIsCurrentItemFromJs = false;

ReactAndroid/src/main/java/com/facebook/react/views/viewpager/ReactViewPagerManager.java

@@ -58,4 +58,19 @@ public class ReactViewPagerManager extends ViewGroupManager<ReactViewPager> {
   public void addView(ReactViewPager parent, View child, int index) {
     parent.addViewToAdapter(child, index);
   }
+
+  @Override
+  public int getChildCount(ReactViewPager parent) {
+    return parent.getViewCountInAdapter();
+  }
+
+  @Override
+  public View getChildAt(ReactViewPager parent, int index) {
+    return parent.getViewFromAdapter(index);
+  }
+
+  @Override
+  public void removeViewAt(ReactViewPager parent, int index) {
+    parent.removeViewFromAdapter(index);
+  }
 }