First checkin for OpenMesh 2.0

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@2 fdac6126-5c0c-442c-9429-916003d36597

Core/Utils/AutoPropertyHandleT.hh

@@ -0,0 +1,115 @@
+/*===========================================================================*\
+ *                                                                           *
+ *                               OpenMesh                                    *
+ *      Copyright (C) 2001-2004 by Computer Graphics Group, RWTH Aachen      *
+ *                           www.openmesh.org                                *
+ *                                                                           *
+ *---------------------------------------------------------------------------*
+ *                                                                           *
+ *                                License                                    *
+ *                                                                           *
+ *  This library is free software; you can redistribute it and/or modify it  *
+ *  under the terms of the GNU Lesser General Public License as published    *
+ *  by the Free Software Foundation, version 2.1.                            *
+ *                                                                           *
+ *  This library 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        *
+ *  Lesser General Public License for more details.                          *
+ *                                                                           *
+ *  You should have received a copy of the GNU Lesser General Public         *
+ *  License along with this library; if not, write to the Free Software      *
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                *
+ *                                                                           *
+\*===========================================================================*/
+
+#ifndef OPENMESH_AutoPropertyHandleT_HH
+#define OPENMESH_AutoPropertyHandleT_HH
+
+//== INCLUDES =================================================================
+#include <assert.h>
+#include <string>
+
+//== NAMESPACES ===============================================================
+
+namespace OpenMesh {
+
+//== CLASS DEFINITION =========================================================
+
+template <class Mesh_, class PropertyHandle_>
+class AutoPropertyHandleT : public PropertyHandle_
+{
+public:
+  typedef Mesh_                             Mesh;
+  typedef PropertyHandle_                   PropertyHandle;
+  typedef PropertyHandle                    Base;
+  typedef typename PropertyHandle::Value    Value;
+  typedef AutoPropertyHandleT<Mesh, PropertyHandle>
+                                            Self;
+protected:
+  Mesh*                                     m_;
+  bool                                      own_property_;//ref counting?
+
+public:
+  AutoPropertyHandleT()
+  : m_(NULL), own_property_(false)
+  {}
+  
+  AutoPropertyHandleT(const Self& _other)
+  : Base(_other.idx()), m_(_other.m_), own_property_(false)
+  {}
+  
+  explicit AutoPropertyHandleT(Mesh& _m, const std::string& _pp_name = std::string())
+  { add_property(_m, _pp_name); }
+
+  AutoPropertyHandleT(Mesh& _m, PropertyHandle _pph)
+  : Base(_pph.idx()), m_(&_m), own_property_(false)
+  {}
+
+  ~AutoPropertyHandleT()
+  {
+    if (own_property_)
+    {
+      m_->remove_property(*this);
+    }
+  }
+
+  inline void                               add_property(Mesh& _m, const std::string& _pp_name = std::string())
+  {
+    assert(!is_valid());
+    m_ = &_m;
+    own_property_ = _pp_name.empty() || !m_->get_property_handle(*this, _pp_name);
+    if (own_property_)
+    {
+      m_->add_property(*this, _pp_name);
+    }
+  }
+  
+  inline void                               remove_property()
+  {
+    assert(own_property_);//only the owner can delete the property
+    m_->remove_property(*this);
+    own_property_ = false;
+    invalidate();
+  }
+  
+  template <class _Handle>
+  inline Value&                             operator [] (_Handle _hnd)
+  { return m_->property(*this, _hnd); }
+
+  template <class _Handle>
+  inline const Value&                       operator [] (_Handle _hnd) const
+  { return m_->property(*this, _hnd); }
+
+  inline bool                               own_property() const
+  { return own_property_; }
+
+  inline void                               free_property()
+  { own_property_ = false; }
+};
+
+//=============================================================================
+} // namespace OpenMesh
+//=============================================================================
+#endif // OPENMESH_AutoPropertyHandleT_HH defined
+//=============================================================================