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/*
* This source file is part of libRocket, the HTML/CSS Interface Middleware
*
* For the latest information, see http://www.librocket.com
*
* Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
#ifndef ROCKETCOREPYTHONELEMENTWRAPPER_H
#define ROCKETCOREPYTHONELEMENTWRAPPER_H
namespace Rocket {
namespace Core {
namespace Python {
/**
Python Wrapper class for Elements
This class maintains is a standard boost wrapper class that
the self pointer for an element and provides virtual
overrides for the hook methods.
@author Lloyd Weehuizen
*/
template <typename T>
class ElementWrapper : public T
{
public:
ElementWrapper( PyObject* self, const char* tag ) : self( self ), T( tag )
{
// Force remove reference, to reduce the count to 0 as python has instanced
// this object. If the call originally came from C++ (PyBRElementInstancer)
// then it will add its own reference
T::RemoveReference();
// If the C++ reference count is not 0 at this point, it means additional references have been added
// during the classes constructor. We have to propogate these references into python.
for (int i = 0; i < this->T::GetReferenceCount(); i++)
Py_INCREF(self);
}
virtual ~ElementWrapper() {}
/// Return the python script object associated with this element
virtual void* GetScriptObject() const { return self; }
// Propogate add ref's into python
virtual void AddReference()
{
Py_INCREF( self );
T::AddReference();
}
// Propogate remove ref's into python
virtual void RemoveReference()
{
T::RemoveReference();
Py_DECREF( self );
}
virtual void OnReferenceDeactivate()
{
// Ignore reference deactivated
}
private:
// Python representation of this object
PyObject* self;
};
}
}
}
#endif
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