scope-locator.hpp

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/*
  SCOPE-LOCATOR.hpp  -  management and registration point for the QueryFocus-system

   Copyright (C)
     2009,            Hermann Vosseler <Ichthyostega@web.de>

  **Lumiera** 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. See the file COPYING for further details.

*/


#ifndef STEAM_MOBJECT_SESSION_SCOPE_LOCATOR_H
#define STEAM_MOBJECT_SESSION_SCOPE_LOCATOR_H

#include "steam/mobject/session/scope.hpp"
#include "steam/mobject/session/scope-query.hpp"
#include "steam/mobject/placement.hpp"
#include "lib/iter-source.hpp"                 
#include "lib/depend.hpp"

#include <memory>


namespace steam {
namespace mobject {
namespace session {
  
  class QueryFocusStack;
  class ScopePath;
  
  
  
  class ScopeLocator
    {
      std::unique_ptr<QueryFocusStack> focusStack_;
      
    public:
      static lib::Depend<ScopeLocator> instance;
      
      ScopePath& currPath();
      ScopePath& pushPath();
      
      template<typename MO>
      typename ScopeQuery<MO>::iterator
      explore (Scope const&);
      
      template<typename MO>
      typename ScopeQuery<MO>::iterator
      query (Scope const&);
      
      template<typename MO>
      typename ScopeQuery<MO>::iterator
      getRawPath (Scope const&);
      
      ScopeQuery<MObject>::iterator
      getRawPath (Scope const&);
      
      lib::IterSource<const Scope>::iterator
      locate (Scope const& target);
      
      size_t stackSize()  const;
      
      
     ~ScopeLocator();
      
    protected:
      ScopeLocator();
      
      friend class lib::DependencyFactory<ScopeLocator>;
      
    private:
      lumiera::QueryResolver const& theResolver();
    };
  
  
  
  
  template<typename MO>
  inline typename ScopeQuery<MO>::iterator
  ScopeLocator::explore (Scope const& scope)
  {
    return ScopeQuery<MO> (scope.getTop(), CHILDREN).resolveBy (theResolver());
  }
  
  
  template<typename MO>
  inline typename ScopeQuery<MO>::iterator
  ScopeLocator::query (Scope const& scope)
  {
    return ScopeQuery<MO> (scope.getTop(), CONTENTS).resolveBy (theResolver());
  }
  
  
  template<typename MO>
  inline typename ScopeQuery<MO>::iterator
  ScopeLocator::getRawPath (Scope const& scope)
  {
    return ScopeQuery<MO> (scope.getTop(), PATH).resolveBy (theResolver());
  }

  inline ScopeQuery<MObject>::iterator
  ScopeLocator::getRawPath (Scope const& scope)
  {
    return ScopeQuery<MObject> (scope.getTop(), PATH).resolveBy (theResolver());
  }
  
  
}}} // namespace steam::mobject::session
#endif