underlined_double.cpp

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// 版權所有 2023 Arthur Sonzogni. 保留所有權利。
// 本原始碼的使用受 MIT 授權條款約束，該條款可在
// LICENSE 檔案中找到。
#include <memory>   // for make_shared
#include <utility>  // for move
 
#include "ftxui/dom/elements.hpp"        // for Element, underlinedDouble
#include "ftxui/dom/node.hpp"            // for Node
#include "ftxui/dom/node_decorator.hpp"  // for NodeDecorator
#include "ftxui/screen/box.hpp"          // for Box
#include "ftxui/screen/screen.hpp"       // for Pixel, Screen
 
namespace ftxui {
 
/// @brief 對文字應用雙底線。
/// @ingroup dom
Element underlinedDouble(Element child) {
  class Impl : public NodeDecorator {
   public:
    using NodeDecorator::NodeDecorator;
 
    void Render(Screen& screen) override {
      for (int y = box_.y_min; y <= box_.y_max; ++y) {
        for (int x = box_.x_min; x <= box_.x_max; ++x) {
          screen.PixelAt(x, y).underlined_double = true;
        }
      }
      Node::Render(screen);
    }
  };
 
  return std::make_shared<Impl>(std::move(child));
}
 
}  // namespace ftxui