text: /*
   * 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 <react/renderer/components/text/ParagraphShadowNode.h>
  #include <react/renderer/core/ConcreteComponentDescriptor.h>
  #include <react/renderer/textlayoutmanager/TextLayoutManager.h>
  #include <react/utils/ContextContainer.h>
  
  namespace facebook {
  namespace react {
  
  /*
   * Descriptor for <Paragraph> component.
   */
  class ParagraphComponentDescriptor final
      : public ConcreteComponentDescriptor<ParagraphShadowNode> {
   public:
    ParagraphComponentDescriptor(ComponentDescriptorParameters const &parameters)
        : ConcreteComponentDescriptor<ParagraphShadowNode>(parameters) {
      // Every single `ParagraphShadowNode` will have a reference to
      // a shared `TextLayoutManager`.
      textLayoutManager_ = std::make_shared<TextLayoutManager>(contextContainer_);
    }
  
   protected:
    void adopt(ShadowNode::Unshared const &shadowNode) const override {
      ConcreteComponentDescriptor::adopt(shadowNode);
  
      auto paragraphShadowNode =
          std::static_pointer_cast<ParagraphShadowNode>(shadowNode);
  
      // `ParagraphShadowNode` uses `TextLayoutManager` to measure text content
      // and communicate text rendering metrics to mounting layer.
      paragraphShadowNode->setTextLayoutManager(textLayoutManager_);
    }
  
   private:
    std::shared_ptr<TextLayoutManager const> textLayoutManager_;
  };
  
  } // namespace react
  } // namespace facebook
  