pass flexiblity to shadowrootview on its creation

Reviewed By: javache

Differential Revision: D3177404

fb-gh-sync-id: 2116628461e37e9f1d1b3cbc6d6560675cadee7e
fbshipit-source-id: 2116628461e37e9f1d1b3cbc6d6560675cadee7e

React/Modules/RCTUIManager.h

@@ -13,6 +13,7 @@
 #import "RCTBridgeModule.h"
 #import "RCTInvalidating.h"
 #import "RCTViewManager.h"
+#import "RCTRootView.h"
 
 /**
  * Posted right before re-render happens. This is a chance for views to invalidate their state so
@@ -47,7 +48,7 @@ RCT_EXTERN NSString *const RCTUIManagerRootViewKey;
 /**
  * Register a root view with the RCTUIManager.
  */
-- (void)registerRootView:(UIView *)rootView;
+- (void)registerRootView:(UIView *)rootView withSizeFlexibility:(RCTRootViewSizeFlexibility)sizeFlexibility;
 
 /**
  * Gets the view associated with a reactTag.

React/Modules/RCTUIManager.m

@@ -26,7 +26,6 @@
 #import "RCTModuleData.h"
 #import "RCTModuleMethod.h"
 #import "RCTProfile.h"
-#import "RCTRootView.h"
 #import "RCTRootShadowView.h"
 #import "RCTRootViewInternal.h"
 #import "RCTScrollableProtocol.h"
@@ -336,7 +335,7 @@ RCT_EXPORT_MODULE()
   return _shadowQueue;
 }
 
-- (void)registerRootView:(UIView *)rootView
+- (void)registerRootView:(UIView *)rootView withSizeFlexibility:(RCTRootViewSizeFlexibility)sizeFlexibility
 {
   RCTAssertMainThread();
 
@@ -364,6 +363,7 @@ RCT_EXPORT_MODULE()
     shadowView.frame = frame;
     shadowView.backgroundColor = rootView.backgroundColor;
     shadowView.viewName = NSStringFromClass([rootView class]);
+    shadowView.sizeFlexibility = sizeFlexibility;
     strongSelf->_shadowViewRegistry[shadowView.reactTag] = shadowView;
     [strongSelf->_rootViewTags addObject:reactTag];
   });