IOManager.hh

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//=============================================================================
//
//  Implements the OpenMesh IOManager singleton
//
//=============================================================================
 
#ifndef __IOMANAGER_HH__
#define __IOMANAGER_HH__
 
 
//=== INCLUDES ================================================================
 
 
// STL
#include <iosfwd>
#include <sstream>
#include <string>
#include <set>
 
// OpenMesh
#include <OpenMesh/Core/System/config.h>
#include <OpenMesh/Core/IO/Options.hh>
#include <OpenMesh/Core/IO/reader/BaseReader.hh>
#include <OpenMesh/Core/IO/writer/BaseWriter.hh>
#include <OpenMesh/Core/IO/importer/BaseImporter.hh>
#include <OpenMesh/Core/IO/exporter/BaseExporter.hh>
#include <OpenMesh/Core/Utils/SingletonT.hh>
 
 
//== NAMESPACES ===============================================================
 
 
namespace OpenMesh {
namespace IO {
 
 
//=== IMPLEMENTATION ==========================================================
 
 
class OPENMESHDLLEXPORT _IOManager_
{
private:
 
  _IOManager_() {}
 
  ~_IOManager_() {};
 
  friend OPENMESHDLLEXPORT _IOManager_& IOManager();
 
public:
 
  bool read(const std::string& _filename,
            BaseImporter& _bi,
            Options& _opt);
 
  bool read(std::istream& _filename,
            const std::string& _ext,
            BaseImporter& _bi,
            Options& _opt);
 
 
  bool write(const std::string& _filename,
             BaseExporter& _be,
             Options _opt=Options::Default,
       std::streamsize _precision = 6);
 
  bool write(std::ostream& _filename,
             const std::string& _ext,
             BaseExporter& _be,
             Options _opt=Options::Default,
       std::streamsize _precision = 6);
 
 
  bool can_read( const std::string& _format ) const;
 
  bool can_write( const std::string& _format ) const;
 
 
  size_t binary_size(const std::string& _format,
                     BaseExporter& _be,
                     Options _opt = Options::Default)
  {
    const BaseWriter *bw = find_writer(_format);
    return bw ? bw->binary_size(_be,_opt) : 0;
  }
 
 
 
public: //-- QT convenience function ------------------------------------------
 
 
  const std::string& qt_read_filters()  const { return read_filters_;  }
 
 
  const std::string& qt_write_filters() const { return write_filters_; }
 
 
 
private:
 
  // collect all readable file extensions
  void update_read_filters();
 
 
  // collect all writeable file extensions
  void update_write_filters();
 
 
 
public:  //-- SYSTEM PART------------------------------------------------------
 
 
  bool register_module(BaseReader* _bl)
  {
    reader_modules_.insert(_bl);
    update_read_filters();
    return true;
  }
 
 
 
  bool register_module(BaseWriter* _bw)
  {
    writer_modules_.insert(_bw);
    update_write_filters();
    return true;
  }
 
 
private:
 
  const BaseWriter *find_writer(const std::string& _format);
 
  // stores registered reader modules
  std::set<BaseReader*> reader_modules_;
 
  // stores registered writer modules
  std::set<BaseWriter*> writer_modules_;
 
  // input filters (e.g. for Qt file dialog)
  std::string read_filters_;
 
  // output filters (e.g. for Qt file dialog)
  std::string write_filters_;
};
 
 
//=============================================================================
 
 
//_IOManager_*  __IOManager_instance; Causes memory leak, as destructor is never called
 
OPENMESHDLLEXPORT _IOManager_& IOManager();
 
//=============================================================================
} // namespace IO
} // namespace OpenMesh
//=============================================================================
#endif
//=============================================================================