Refactor componentNameByReactViewName into separate file

Summary:
Changelog: [internal]

Extract componentNameByReactViewName to separate file so it can be used elsewhere.

Reviewed By: shergin, mdvacca

Differential Revision: D26946159

fbshipit-source-id: cf69df1f80f1c1938fc667f4666a5d3fec5a9658

Author: sammy-SC

ReactCommon/react/renderer/componentregistry/ComponentDescriptorRegistry.cpp

@@ -7,6 +7,8 @@
 
 #include "ComponentDescriptorRegistry.h"
 
+#include "componentNameByReactViewName.h"
+
 #include <react/debug/react_native_assert.h>
 #include <react/renderer/componentregistry/ComponentDescriptorProviderRegistry.h>
 #include <react/renderer/core/ShadowNodeFragment.h>
@@ -50,64 +52,6 @@ void ComponentDescriptorRegistry::registerComponentDescriptor(
   _registryByName[componentName] = componentDescriptor;
 }
 
-static std::string componentNameByReactViewName(std::string viewName) {
-  // We need this function only for the transition period;
-  // eventually, all names will be unified.
-
-  std::string rctPrefix("RCT");
-  if (std::mismatch(rctPrefix.begin(), rctPrefix.end(), viewName.begin())
-          .first == rctPrefix.end()) {
-    // If `viewName` has "RCT" prefix, remove it.
-    viewName.erase(0, rctPrefix.length());
-  }
-
-  // Fabric uses slightly new names for Text components because of differences
-  // in semantic.
-  if (viewName == "Text") {
-    return "Paragraph";
-  }
-
-  // TODO T63839307: remove this condition after deleting TextInlineImage from
-  // non-Fabric code
-  if (viewName == "TextInlineImage") {
-    return "Image";
-  }
-  if (viewName == "VirtualText") {
-    return "Text";
-  }
-
-  if (viewName == "ImageView") {
-    return "Image";
-  }
-
-  if (viewName == "AndroidHorizontalScrollView") {
-    return "ScrollView";
-  }
-
-  if (viewName == "RKShimmeringView") {
-    return "ShimmeringView";
-  }
-
-  if (viewName == "RefreshControl") {
-    return "PullToRefreshView";
-  }
-
-  // We need this temporarily for testing purposes until we have proper
-  // implementation of core components.
-  // iOS-only
-  if (viewName == "ScrollContentView") {
-    return "View";
-  }
-
-  // iOS-only
-  if (viewName == "MultilineTextInputView" ||
-      viewName == "SinglelineTextInputView") {
-    return "TextInput";
-  }
-
-  return viewName;
-}
-
 ComponentDescriptor const &ComponentDescriptorRegistry::at(
     std::string const &componentName) const {
   std::shared_lock<better::shared_mutex> lock(mutex_);

ReactCommon/react/renderer/componentregistry/componentNameByReactViewName.cpp

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include "componentNameByReactViewName.h"
+
+namespace facebook {
+namespace react {
+
+std::string componentNameByReactViewName(std::string viewName) {
+  // We need this function only for the transition period;
+  // eventually, all names will be unified.
+
+  std::string rctPrefix("RCT");
+  if (std::mismatch(rctPrefix.begin(), rctPrefix.end(), viewName.begin())
+          .first == rctPrefix.end()) {
+    // If `viewName` has "RCT" prefix, remove it.
+    viewName.erase(0, rctPrefix.length());
+  }
+
+  // Fabric uses slightly new names for Text components because of differences
+  // in semantic.
+  if (viewName == "Text") {
+    return "Paragraph";
+  }
+
+  // TODO T63839307: remove this condition after deleting TextInlineImage from
+  // non-Fabric code
+  if (viewName == "TextInlineImage") {
+    return "Image";
+  }
+  if (viewName == "VirtualText") {
+    return "Text";
+  }
+
+  if (viewName == "ImageView") {
+    return "Image";
+  }
+
+  if (viewName == "AndroidHorizontalScrollView") {
+    return "ScrollView";
+  }
+
+  if (viewName == "RKShimmeringView") {
+    return "ShimmeringView";
+  }
+
+  if (viewName == "RefreshControl") {
+    return "PullToRefreshView";
+  }
+
+  // We need this temporarily for testing purposes until we have proper
+  // implementation of core components.
+  // iOS-only
+  if (viewName == "ScrollContentView") {
+    return "View";
+  }
+
+  // iOS-only
+  if (viewName == "MultilineTextInputView" ||
+      viewName == "SinglelineTextInputView") {
+    return "TextInput";
+  }
+
+  return viewName;
+}
+
+} // namespace react
+} // namespace facebook

ReactCommon/react/renderer/componentregistry/componentNameByReactViewName.h

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+
+#include <string>
+
+namespace facebook {
+namespace react {
+
+/**
+ * Provides mapping from old view name format to the new format.
+ */
+std::string componentNameByReactViewName(std::string viewName);
+
+} // namespace react
+} // namespace facebook