text: 
  //
  // This source file is part of appleseed.
  // Visit https://appleseedhq.net/ for additional information and resources.
  //
  // This software is released under the MIT license.
  //
  // Copyright (c) 2016-2018 Francois Beaune, The appleseedhq Organization
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  //
  
  #ifndef APPLESEED_RENDERER_MODELING_PROJECT_ASSETHANDLER_H
  #define APPLESEED_RENDERER_MODELING_PROJECT_ASSETHANDLER_H
  
  // Boost headers.
  #include "boost/filesystem/path.hpp"
  
  // Standard headers.
  #include <string>
  
  // Forward declarations.
  namespace renderer { class Project; }
  
  namespace renderer
  {
  
  class AssetHandler
  {
    public:
      enum Mode
      {
          CopyRelativeAssetsOnly,     // only bring asset files with relative paths
          CopyAllAssets               // bring all asset files
      };
  
      // Constructor.
      AssetHandler(
          Project&                    project,
          const char*                 filepath,
          const Mode                  mode);
  
      bool handle_assets() const;
  
    private:
      Project&                        m_project;
      const boost::filesystem::path   m_project_old_root_path;
      const boost::filesystem::path   m_project_new_root_path;
      const boost::filesystem::path   m_project_old_root_dir;
      const boost::filesystem::path   m_project_new_root_dir;
      const Mode                      m_mode;
  
      bool handle_asset(std::string& asset_path) const;
      bool handle_absolute_asset(std::string& asset_path) const;
      bool make_absolute_asset_path(std::string& asset_path) const;
      bool copy_absolute_asset(std::string& asset_path) const;
      bool copy_relative_asset(std::string& asset_path) const;
  };
  
  }       // namespace renderer
  
  #endif  // !APPLESEED_RENDERER_MODELING_PROJECT_ASSETHANDLER_H
  