move fabric to ReactCommon/react/renderer

Summary:
This diff moves fabric C++ code from ReactCommon/fabric to ReactCommon/react/renderer
As part of this diff I also refactored components, codegen and callsites on CatalystApp, FB4A and venice

Script: P137350694

changelog: [internal] internal refactor

Reviewed By: fkgozali

Differential Revision: D22852139

fbshipit-source-id: f85310ba858b6afd81abfd9cbe6d70b28eca7415

ReactCommon/react/renderer/attributedstring/AttributedStringBox.cpp

@@ -0,0 +1,65 @@
+/*
+ * 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 "AttributedStringBox.h"
+
+namespace facebook {
+namespace react {
+
+AttributedStringBox::AttributedStringBox()
+    : mode_(Mode::Value),
+      value_(std::make_shared<AttributedString const>(AttributedString{})),
+      opaquePointer_({}){};
+
+AttributedStringBox::AttributedStringBox(AttributedString const &value)
+    : mode_(Mode::Value),
+      value_(std::make_shared<AttributedString const>(value)),
+      opaquePointer_({}){};
+
+AttributedStringBox::AttributedStringBox(
+    std::shared_ptr<void> const &opaquePointer)
+    : mode_(Mode::OpaquePointer), value_({}), opaquePointer_(opaquePointer) {}
+
+AttributedStringBox::Mode AttributedStringBox::getMode() const {
+  return mode_;
+}
+
+AttributedString const &AttributedStringBox::getValue() const {
+  assert(mode_ == AttributedStringBox::Mode::Value);
+  assert(value_);
+  return *value_;
+}
+
+std::shared_ptr<void> AttributedStringBox::getOpaquePointer() const {
+  assert(mode_ == AttributedStringBox::Mode::OpaquePointer);
+  assert(opaquePointer_);
+  return opaquePointer_;
+}
+
+bool operator==(
+    AttributedStringBox const &lhs,
+    AttributedStringBox const &rhs) {
+  if (lhs.getMode() != rhs.getMode()) {
+    return false;
+  }
+
+  switch (lhs.getMode()) {
+    case facebook::react::AttributedStringBox::Mode::Value:
+      return lhs.getValue() == rhs.getValue();
+    case facebook::react::AttributedStringBox::Mode::OpaquePointer:
+      return lhs.getOpaquePointer() == rhs.getOpaquePointer();
+  }
+}
+
+bool operator!=(
+    AttributedStringBox const &lhs,
+    AttributedStringBox const &rhs) {
+  return !(lhs == rhs);
+}
+
+} // namespace react
+} // namespace facebook