Allow to provide a custom TextLayoutManager for cxx platform (#48127)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/48127

[Changelog] [Internal] -  Allow to provide a custom TextLayoutManager for cxx platform

This change allows target platforms to pass a platform specific or app specific TextLayoutManager implementation

Reviewed By: zeyap

Differential Revision: D66802434

fbshipit-source-id: a64e28d357bf601c7234b43f86538f49e62c8435

packages/react-native/ReactCommon/react/renderer/components/image/ImageComponentDescriptor.cpp

@@ -8,23 +8,6 @@
 #include "ImageComponentDescriptor.h"
 #include <react/renderer/imagemanager/ImageManager.h>
 
-namespace {
-
-std::shared_ptr<facebook::react::ImageManager> getImageManager(
-    std::shared_ptr<const facebook::react::ContextContainer>&
-        contextContainer) {
-  if (auto imageManager =
-          contextContainer
-              ->find<std::shared_ptr<facebook::react::ImageManager>>(
-                  facebook::react::ImageManagerKey);
-      imageManager.has_value()) {
-    return imageManager.value();
-  }
-  return std::make_shared<facebook::react::ImageManager>(contextContainer);
-}
-
-} // namespace
-
 namespace facebook::react {
 
 extern const char ImageManagerKey[] = "ImageManager";
@@ -32,7 +15,8 @@ extern const char ImageManagerKey[] = "ImageManager";
 ImageComponentDescriptor::ImageComponentDescriptor(
     const ComponentDescriptorParameters& parameters)
     : ConcreteComponentDescriptor(parameters),
-      imageManager_(getImageManager(contextContainer_)){};
+      imageManager_(
+          getManagerByName<ImageManager>(contextContainer_, ImageManagerKey)){};
 
 void ImageComponentDescriptor::adopt(ShadowNode& shadowNode) const {
   ConcreteComponentDescriptor::adopt(shadowNode);

packages/react-native/ReactCommon/react/renderer/components/text/ParagraphComponentDescriptor.cpp

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include "ParagraphComponentDescriptor.h"
+
+namespace facebook::react {
+
+extern const char TextLayoutManagerKey[] = "TextLayoutManager";
+
+} // namespace facebook::react

packages/react-native/ReactCommon/react/renderer/components/text/ParagraphComponentDescriptor.h

@@ -14,18 +14,20 @@
 
 namespace facebook::react {
 
+extern const char TextLayoutManagerKey[];
+
 /*
  * Descriptor for <Paragraph> component.
  */
 class ParagraphComponentDescriptor final
     : public ConcreteComponentDescriptor<ParagraphShadowNode> {
  public:
-  ParagraphComponentDescriptor(const ComponentDescriptorParameters& parameters)
-      : ConcreteComponentDescriptor<ParagraphShadowNode>(parameters) {
-    // Every single `ParagraphShadowNode` will have a reference to
-    // a shared `TextLayoutManager`.
-    textLayoutManager_ = std::make_shared<TextLayoutManager>(contextContainer_);
-  }
+  explicit ParagraphComponentDescriptor(
+      const ComponentDescriptorParameters& parameters)
+      : ConcreteComponentDescriptor<ParagraphShadowNode>(parameters),
+        textLayoutManager_(getManagerByName<TextLayoutManager>(
+            contextContainer_,
+            TextLayoutManagerKey)) {}
 
  protected:
   void adopt(ShadowNode& shadowNode) const override {
@@ -39,7 +41,8 @@ class ParagraphComponentDescriptor final
   }
 
  private:
-  std::shared_ptr<const TextLayoutManager> textLayoutManager_;
+  // Every `ParagraphShadowNode` has a reference to a shared `TextLayoutManager`
+  const std::shared_ptr<const TextLayoutManager> textLayoutManager_;
 };
 
 } // namespace facebook::react

packages/react-native/ReactCommon/react/renderer/core/ConcreteComponentDescriptor.h

@@ -184,4 +184,17 @@ class ConcreteComponentDescriptor : public ComponentDescriptor {
   }
 };
 
+template <typename TManager>
+std::shared_ptr<TManager> getManagerByName(
+    std::shared_ptr<const ContextContainer>& contextContainer,
+    const char name[]) {
+  if (contextContainer) {
+    if (auto manager = contextContainer->find<std::shared_ptr<TManager>>(name);
+        manager.has_value()) {
+      return manager.value();
+    }
+  }
+  return std::make_shared<TManager>(contextContainer);
+}
+
 } // namespace facebook::react