//#include <boost/python.hpp>
#include <boost/foreach.hpp>
-#include <boost/function.hpp>
-#include <boost/utility/enable_if.hpp>
#include <boost/algorithm/string/case_conv.hpp>
#include <boost/make_shared.hpp>
#include <osgGA/GUIEventAdapter>
#include <simgear/canvas/Canvas.hxx>
#include <simgear/canvas/elements/CanvasElement.hxx>
+#include <simgear/nasal/cppbind/from_nasal.hxx>
#include <simgear/nasal/cppbind/to_nasal.hxx>
#include <simgear/nasal/cppbind/NasalHash.hxx>
+#include <simgear/nasal/cppbind/Ghost.hxx>
extern naRef propNodeGhostCreate(naContext c, SGPropertyNode* n);
return propNodeGhostCreate(c, canvas->getProps());
}
-namespace nasal
-{
-
- template<class T>
- struct class_traits
- {
- typedef boost::false_type::type is_shared;
- typedef T raw_type;
- };
-
- template<class T>
- struct class_traits<boost::shared_ptr<T> >
- {
- typedef boost::true_type::type is_shared;
- typedef T raw_type;
- };
-
- template<class T>
- struct class_traits<osg::ref_ptr<T> >
- {
- typedef boost::true_type::type is_shared;
- typedef T raw_type;
- };
-
- template<class T>
- struct class_traits<SGSharedPtr<T> >
- {
- typedef boost::true_type::type is_shared;
- typedef T raw_type;
- };
-
- template<class T>
- struct SharedPointerPolicy
- {
- typedef typename class_traits<T>::raw_type raw_type;
-
- /**
- * Create a shared pointer on the heap to handle the reference counting for
- * the passed shared pointer while it is used in Nasal space.
- */
- static T* createInstance(const T& ptr)
- {
- return new T(ptr);
- }
-
- static raw_type* getRawPtr(void* ptr)
- {
- return static_cast<T*>(ptr)->get();
- }
- };
-
- template<class T>
- struct RawPointerPolicy
- {
- typedef typename class_traits<T>::raw_type raw_type;
-
- static T* createInstance()
- {
- return new T();
- }
-
- static raw_type* getRawPtr(void* ptr)
- {
- BOOST_STATIC_ASSERT((boost::is_same<raw_type, T>::value));
- return static_cast<T*>(ptr);
- }
- };
-
- class class_metadata
- {
- public:
- void addNasalBase(const naRef& parent)
- {
- assert( naIsHash(parent) );
- _parents.push_back(parent);
- }
-
- protected:
- const std::string _name;
- naGhostType _ghost_type;
- std::vector<class_metadata*> _base_classes;
- std::vector<naRef> _parents;
-
- explicit class_metadata(const std::string& name):
- _name(name)
- {
-
- }
-
- void addBaseClass(class_metadata* base)
- {
- assert(base);
- std::cout << _name << ": addBase(" << base->_name << ")" << std::endl;
- _base_classes.push_back(base);
- }
-
- naRef getParents(naContext c)
- {
- return nasal::to_nasal(c, _parents);
- }
- };
-
- /**
- * Class for exposing C++ objects to Nasal
- */
- template<class T>
- class class_:
- public class_metadata,
- protected boost::mpl::if_< typename class_traits<T>::is_shared,
- SharedPointerPolicy<T>,
- RawPointerPolicy<T> >::type
- {
- private:
- typedef typename class_traits<T>::raw_type raw_type;
-
- public:
-
- typedef boost::function<naRef(naContext c, raw_type*)> getter_t;
- typedef std::map<std::string, getter_t> GetterMap;
-
- static class_& init(const std::string& name)
- {
- getSingletonHolder().reset( new class_(name) );
- return *getSingletonPtr();
- }
-
- static naRef f_create(naContext c, naRef me, int argc, naRef* args)
- {
- return create(c);
- }
-
- static naRef create( naContext c )
- {
- return makeGhost(c, class_::createInstance());
- }
-
- // TODO use variadic template when supporting C++11
- template<class A1>
- static naRef create( naContext c, const A1& a1 )
- {
- return makeGhost(c, class_::createInstance(a1));
- }
-
- class_& bases(const naRef& parent)
- {
- addNasalBase(parent);
- return *this;
- }
-
- template<class Base>
- typename boost::enable_if
- < boost::is_convertible<Base, class_metadata>,
- class_
- >::type&
- bases()
- {
- Base* base = Base::getSingletonPtr();
- addBaseClass( base );
-
- // Replace any getter that is not available in the current class.
- // TODO check if this is the correct behavior of function overriding
- const typename Base::GetterMap& base_getter = base->getGetter();
- for( typename Base::GetterMap::const_iterator getter =
- base_getter.begin();
- getter != base_getter.end();
- ++getter )
- {
- if( _getter.find(getter->first) == _getter.end() )
- _getter.insert( *getter );
- }
-
- return *this;
- }
-
- template<class Type>
- typename boost::enable_if_c
- < !boost::is_convertible< Type, class_metadata>::value,
- class_
- >::type&
- bases()
- {
- return bases< class_<Type> >();
- }
-
- template<class Var>
- class_& member( const std::string& field,
- Var (raw_type::*getter)() const,
- void (raw_type::*setter)(const Var&) = 0 )
- {
- naRef (*to_nasal)(naContext, Var) = &nasal::to_nasal;
- _getter[field] = boost::bind( to_nasal,
- _1,
- boost::bind(getter, _2) );
- return *this;
- }
-
- class_& member( const std::string& field,
- const getter_t& getter )
- {
- _getter[field] = getter;
- return *this;
- }
-
- static class_* getSingletonPtr()
- {
- return getSingletonHolder().get();
- }
-
- const GetterMap& getGetter() const
- {
- return _getter;
- }
-
- private:
-
- typedef std::auto_ptr<class_> class_ptr;
- GetterMap _getter;
-
- explicit class_(const std::string& name):
- class_metadata( name )
- {
- _ghost_type.destroy = &destroyGhost;
- _ghost_type.name = _name.c_str();
- _ghost_type.get_member = &getMember;
- _ghost_type.set_member = 0;
- }
-
- static class_ptr& getSingletonHolder()
- {
- static class_ptr instance;
- return instance;
- }
-
- static naRef makeGhost(naContext c, void *ptr)
- {
- std::cout << "makeGhost " << ptr << std::endl;
- return naNewGhost2(c, &getSingletonPtr()->_ghost_type, ptr);
- }
-
- static void destroyGhost(void *ptr)
- {
- std::cout << "destroyGhost " << ptr << std::endl;
- delete (T*)ptr;
- }
-
- static const char* getMember(naContext c, void* g, naRef field, naRef* out)
- {
- const std::string key = naStr_data(field);
- if( key == "parents" )
- {
- if( getSingletonPtr()->_parents.empty() )
- return 0;
-
- *out = getSingletonPtr()->getParents(c);
- return "";
- }
-
- typename GetterMap::iterator getter =
- getSingletonPtr()->_getter.find(key);
-
- if( getter == getSingletonPtr()->_getter.end() )
- return 0;
-
- *out = getter->second(c, class_::getRawPtr(g));
- return "";
- }
- };
-}
-
struct Base
{
int getInt() const
{
Test(): x(1) {}
int x;
+ void setX(int x_) { x = x_; }
+ naRef test(int argc, naRef* args)
+ {
+ return naNil();
+ }
};
-typedef nasal::class_<sc::CanvasPtr> NasalCanvas;
+typedef nasal::Ghost<sc::CanvasPtr> NasalCanvas;
-void initCanvas()
+void initCanvas(naContext c)
{
NasalCanvas::init("Canvas")
.member("_node_ghost", &canvasGetNode)
.member("size_x", &sc::Canvas::getSizeX)
.member("size_y", &sc::Canvas::getSizeY);
- nasal::class_<sc::ElementPtr>::init("canvas.Element");
- nasal::class_<sc::GroupPtr>::init("canvas.Group")
+ nasal::Ghost<sc::ElementPtr>::init("canvas.Element");
+ nasal::Ghost<sc::GroupPtr>::init("canvas.Group")
.bases<sc::ElementPtr>();
- nasal::class_<Base>::init("BaseClass")
+ nasal::Ghost<Base>::init("BaseClass")
.member("int", &Base::getInt);
- nasal::class_<Test>::init("TestClass")
- .bases<Base>();
+ nasal::Ghost<Test>::init("TestClass")
+ .bases<Base>()
+ .member("x", &Test::setX)
+ .method<&Test::test>("test");
}
#if 0
// TODO switch to boost::/std::function (with C++11 lambdas this can make
// adding setters easier and shorter)
typedef naRef (Derived::*getter_t)(naContext, const T&);
- typedef std::map<std::string, getter_t> GetterMap;
+ typedef std::map<std::string, getter_t> MemberMap;
const std::string _ghost_name;
std::vector<naRef> _parents;
- GetterMap _getter;
+ MemberMap _members;
NasalObject(const std::string& ghost_name):
_ghost_name( ghost_name )
_ghost_type.get_member = &Derived::getMember;
_ghost_type.set_member = 0;
- _getter["parents"] = &NasalObject::getParents;
+ _members["parents"] = &NasalObject::getParents;
}
naRef getParents(naContext c, const T&)
static const char* getMember(naContext c, void* g, naRef field, naRef* out)
{
- typename GetterMap::iterator getter =
- getInstance()._getter.find(naStr_data(field));
+ typename MemberMap::iterator getter =
+ getInstance()._members.find(naStr_data(field));
- if( getter == getInstance()._getter.end() )
+ if( getter == getInstance()._members.end() )
return 0;
*out = (getInstance().*getter->second)(c, *static_cast<T*>(g));
NasalCanvasEvent():
NasalObject("CanvasEvent")
{
- _getter["type"] = &NasalCanvasEvent::getEventType;
+ _members["type"] = &NasalCanvasEvent::getEventType;
}
naRef getEventType(naContext c, const GUIEventPtr& event)
canvas_module = globals_module.createHash("canvas");
canvas_module.set("_new", f_createCanvas);
- canvas_module.set("testClass", nasal::class_<Test>::f_create);
+ canvas_module.set("testClass", nasal::Ghost<Test>::f_create);
- initCanvas();
+ initCanvas(c);
return naNil();
}
projects / flightgear.git / commitdiff