Support native ViewManager inheritance on iOS

Libraries/ReactNative/requireNativeComponent.js

@@ -70,13 +70,19 @@ function requireNativeComponent(
     viewConfig.propTypes = null;
   }
 
-  // The ViewConfig doesn't contain any props inherited from the view manager's
-  // superclass, so we manually merge in the RCTView ones. Other inheritance
-  // patterns are currenty not supported.
-  const nativeProps = {
-    ...UIManager.RCTView.NativeProps,
-    ...viewConfig.NativeProps,
-  };
+  let baseModuleName = viewConfig.baseModuleName;
+  let nativeProps = { ...viewConfig.NativeProps };
+  while (baseModuleName) {
+    const baseModule = UIManager[baseModuleName];
+    if (!baseModule) {
+      warning(false, 'Base module "%s" does not exist', baseModuleName);
+      baseModuleName = null;
+    } else {
+      nativeProps = { ...nativeProps, ...baseModule.NativeProps };
+      baseModuleName = baseModule.baseModuleName;
+    }
+  }
+
   for (const key in nativeProps) {
     let useAttribute = false;
     const attribute = {};

React/Modules/RCTUIManager.m

@@ -1542,6 +1542,7 @@ static void RCTMeasureLayout(RCTShadowView *view,
      // Add native props
      NSDictionary<NSString *, id> *viewConfig = [componentData viewConfig];
      moduleConstants[@"NativeProps"] = viewConfig[@"propTypes"];
+     moduleConstants[@"baseModuleName"] = viewConfig[@"baseModuleName"];
 
      // Add direct events
      for (NSString *eventName in viewConfig[@"directEvents"]) {

React/Views/RCTComponentData.m

@@ -41,23 +41,7 @@ - (instancetype)initWithManagerClass:(Class)managerClass
     _viewPropBlocks = [NSMutableDictionary new];
     _shadowPropBlocks = [NSMutableDictionary new];
 
-    // Hackety hack, this partially re-implements RCTBridgeModuleNameForClass
-    // We want to get rid of RCT and RK prefixes, but a lot of JS code still references
-    // view names by prefix. So, while RCTBridgeModuleNameForClass now drops these
-    // prefixes by default, we'll still keep them around here.
-    NSString *name = [managerClass moduleName];
-    if (name.length == 0) {
-      name = NSStringFromClass(managerClass);
-    }
-    if ([name hasPrefix:@"RK"]) {
-      name = [name stringByReplacingCharactersInRange:(NSRange){0, @"RK".length} withString:@"RCT"];
-    }
-    if ([name hasSuffix:@"Manager"]) {
-      name = [name substringToIndex:name.length - @"Manager".length];
-    }
-
-    RCTAssert(name.length, @"Invalid moduleName '%@'", name);
-    _name = name;
+    _name = moduleNameForClass(managerClass);
 
     _implementsUIBlockToAmendWithShadowViewRegistry = NO;
     Class cls = _managerClass;
@@ -439,11 +423,14 @@ - (void)setProps:(NSDictionary<NSString *, id> *)props forShadowView:(RCTShadowV
     }
   }
 #endif
-
+
+  Class superClass = [_managerClass superclass];
+
   return @{
     @"propTypes": propTypes,
     @"directEvents": directEvents,
     @"bubblingEvents": bubblingEvents,
+    @"baseModuleName": superClass == [NSObject class] ? [NSNull null] : moduleNameForClass(superClass)
   };
 }
 
@@ -455,4 +442,26 @@ - (RCTViewManagerUIBlock)uiBlockToAmendWithShadowViewRegistry:(NSDictionary<NSNu
   return nil;
 }
 
+static NSString *moduleNameForClass(Class managerClass)
+{
+  // Hackety hack, this partially re-implements RCTBridgeModuleNameForClass
+  // We want to get rid of RCT and RK prefixes, but a lot of JS code still references
+  // view names by prefix. So, while RCTBridgeModuleNameForClass now drops these
+  // prefixes by default, we'll still keep them around here.
+  NSString *name = [managerClass moduleName];
+  if (name.length == 0) {
+    name = NSStringFromClass(managerClass);
+  }
+  if ([name hasPrefix:@"RK"]) {
+    name = [name stringByReplacingCharactersInRange:(NSRange){0, @"RK".length} withString:@"RCT"];
+  }
+  if ([name hasSuffix:@"Manager"]) {
+    name = [name substringToIndex:name.length - @"Manager".length];
+  }
+
+  RCTAssert(name.length, @"Invalid moduleName '%@'", name);
+
+  return name;
+}
+
 @end