| """Simplistic wrapper decorator for Python-coded wrappers""" | |
| from OpenGL.latebind import Curry | |
| from OpenGL import MODULE_ANNOTATIONS | |
| class _LazyWrapper( Curry ): | |
| """Marker to tell us that an object is a lazy wrapper""" | |
| def lazy( baseFunction ): | |
| """Produce a lazy-binding decorator that uses baseFunction | |
| Allows simple implementation of wrappers where the | |
| whole of the wrapper can be summed up as do 1 thing | |
| then call base function with the cleaned up result. | |
| Passes baseFunction in as the first argument of the | |
| wrapped function, all other parameters are passed | |
| unchanged. The wrapper class created has __nonzero__ | |
| and similar common wrapper entry points defined. | |
| """ | |
| def wrap( wrapper ): | |
| """Wrap wrapper with baseFunction""" | |
| def __nonzero__( self ): | |
| return bool( baseFunction ) | |
| def __repr__( self ): | |
| return '%s( %r )'%( | |
| 'OpenGL.lazywrapper.lazy', | |
| baseFunction.__name__, | |
| ) | |
| _with_wrapper = type( wrapper.__name__, (_LazyWrapper,), { | |
| '__repr__': __repr__, | |
| '__doc__': wrapper.__doc__, | |
| '__nonzero__': __nonzero__, | |
| 'wrappedOperation': baseFunction, | |
| 'restype': getattr(wrapper, 'restype',getattr(baseFunction,'restype',None)), | |
| } ) | |
| with_wrapper = _with_wrapper(wrapper,baseFunction) | |
| with_wrapper.__name__ = wrapper.__name__ | |
| if hasattr( baseFunction, '__module__' ): | |
| with_wrapper.__module__ = baseFunction.__module__ | |
| return with_wrapper | |
| return wrap | |
| if __name__ == "__main__": | |
| from OpenGL.raw import GLU | |
| func = GLU.gluNurbsCallbackData | |
| output = [] | |
| def testwrap( base ): | |
| "Testing" | |
| output.append( base ) | |
| testlazy = lazy( func )( testwrap ) | |
| testlazy( ) | |
| assert testlazy.__doc__ == "Testing" | |
| assert testlazy.__class__.__name__ == 'testwrap' | |
| assert testlazy.__name__ == 'testwrap' | |
| assert testlazy.baseFunction is func | |
| assert testlazy.wrapperFunction is testwrap | |
| assert output | |