"""Simplistic wrapper decorator for Python-coded wrappers"""
from OpenGL.latebind import Curry
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__
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
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