session-impl.cpp

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/*
  SessionImpl  -  holds the complete session data to be edited by the user

  Copyright (C)         Lumiera.org
    2008,               Hermann Vosseler <Ichthyostega@web.de>

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation; either version 2 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 General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

* *****************************************************/


#include "steam/mobject/session/session-impl.hpp"
#include "steam/mobject/session/mobjectfactory.hpp"
#include "steam/mobject/session/query-focus.hpp"
#include "steam/mobject/placement.hpp"
#include "steam/mobject/mobject.hpp"
#include "lib/error.hpp"


namespace steam {
namespace mobject {
namespace session {
  
  
  
  SessionImpl::SessionImpl ()
    : SessionInterfaceModules()
    , Session( defaultsManager_
             , elementQueryAPI_
             , timelineRegistry_
             , sequenceRegistry_ )
    , contents_( MObject::create (defaultsManager_))
    , fixture_(new fixture::Fixture)
    {
      INFO (session, "new Session created.");
    }
  
  
  void 
  SessionImpl::clear ()
  {
    try
      {
      }
    catch (...)
      {
        throw error::Fatal ("unexpected exception while clearing the session");          
      }
  }
  
  
  bool 
  SessionImpl::isValid ()
  {
    return true;          
  }
  
  
  
  MObjectRef 
  SessionImpl::attach (PMO const& placement)
  {
    MObjectRef newAttachedInstance;
    RefPlacement attachmentPoint = QueryFocus().currentPoint();
    newAttachedInstance.activate(
        contents_.insert (placement, attachmentPoint));
    return newAttachedInstance;
  }
  
  
  bool 
  SessionImpl::detach (PMO const& placement)
  {
    bool is_known = contents_.contains (placement);
    if (is_known)
      {
        if (Scope(placement).isRoot())
          throw error::Invalid ("Can't detach the model root."
                               , LERR_(INVALID_SCOPE));
        
        QueryFocus currentFocus;
        currentFocus.shift (Scope(placement).getParent());
        contents_.clear (placement);
      }
    ENSURE (!contents_.contains (placement));
    return is_known;
  }
  
  
  MObjectRef
  SessionImpl::getRoot()
  {
    MObjectRef refRoot;
    refRoot.activate (contents_.getRoot());
    return refRoot;
  }

  
  
  PFixture&
  SessionImpl::getFixture ()
  {
    return fixture_;
  }
  
  
  void
  SessionImpl::rebuildFixture ()
  { 
    UNIMPLEMENTED ("rebuild Fixture");
  }
  
  
  
}}} // namespace steam::mobject::session