/**
 * Stone of Orthanc
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 * Copyright (C) 2017 Osimis, Belgium
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 **/


#include "LayerSourceBase.h"

#include "../../Resources/Orthanc/Core/OrthancException.h"

namespace OrthancStone
{
  namespace
  {
    class LayerReadyFunctor : public boost::noncopyable
    {
    private:
      std::auto_ptr<ILayerRenderer>  layer_;
      const Slice&                   slice_;
      
    public:
      LayerReadyFunctor(ILayerRenderer* layer,
                        const Slice& slice) :
        layer_(layer),
        slice_(slice)
      {
        if (layer == NULL)
        {
          throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
        }
      }

      void operator() (ILayerSource::IObserver& observer,
                       const ILayerSource& source)
      {
        observer.NotifyLayerReady(layer_, source, slice_);
      }
    };
  }

  void LayerSourceBase::NotifyGeometryReady()
  {
    observers_.Apply(*this, &IObserver::NotifyGeometryReady);
  }
    
  void LayerSourceBase::NotifyGeometryError()
  {
    observers_.Apply(*this, &IObserver::NotifyGeometryError);
  }  
    
  void LayerSourceBase::NotifyContentChange()
  {
    observers_.Apply(*this, &IObserver::NotifyContentChange);
  }

  void LayerSourceBase::NotifySliceChange(const Slice& slice)
  {
    observers_.Apply(*this, &IObserver::NotifySliceChange, slice);
  }

  void LayerSourceBase::NotifyLayerReady(ILayerRenderer* layer,
                                         const Slice& slice)
  {
    LayerReadyFunctor functor(layer, slice);
    observers_.Notify(*this, functor);
  }

  void LayerSourceBase::NotifyLayerError(const SliceGeometry& slice)
  {
    observers_.Apply(*this, &IObserver::NotifyLayerError, slice);
  }

  void LayerSourceBase::Register(IObserver& observer)
  {
    observers_.Register(observer);
  }
}