Viewing file:  decorators.py (3.04 KB) -rw-r--r--
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import _util
import inspect
import dbus_bindings
def method(dbus_interface, in_signature=None, out_signature=None, async_callbacks=None, sender_keyword=None):
_util._validate_interface_or_name(dbus_interface)
def decorator(func):
args = inspect.getargspec(func)[0]
args.pop(0)
if async_callbacks:
if type(async_callbacks) != tuple:
raise TypeError('async_callbacks must be a tuple of (keyword for return callback, keyword for error callback)')
if len(async_callbacks) != 2:
raise ValueError('async_callbacks must be a tuple of (keyword for return callback, keyword for error callback)')
args.remove(async_callbacks[0])
args.remove(async_callbacks[1])
if sender_keyword:
args.remove(sender_keyword)
if in_signature:
in_sig = tuple(dbus_bindings.Signature(in_signature))
if len(in_sig) > len(args):
raise ValueError, 'input signature is longer than the number of arguments taken'
elif len(in_sig) < len(args):
raise ValueError, 'input signature is shorter than the number of arguments taken'
func._dbus_is_method = True
func._dbus_async_callbacks = async_callbacks
func._dbus_interface = dbus_interface
func._dbus_in_signature = in_signature
func._dbus_out_signature = out_signature
func._dbus_sender_keyword = sender_keyword
func._dbus_args = args
return func
return decorator
def signal(dbus_interface, signature=None):
_util._validate_interface_or_name(dbus_interface)
def decorator(func):
def emit_signal(self, *args, **keywords):
func(self, *args, **keywords)
message = dbus_bindings.Signal(self._object_path, dbus_interface, func.__name__)
iter = message.get_iter(True)
if emit_signal._dbus_signature:
signature = tuple(dbus_bindings.Signature(emit_signal._dbus_signature))
for (arg, sig) in zip(args, signature):
iter.append_strict(arg, sig)
else:
for arg in args:
iter.append(arg)
self._connection.send(message)
args = inspect.getargspec(func)[0]
args.pop(0)
if signature:
sig = tuple(dbus_bindings.Signature(signature))
if len(sig) > len(args):
raise ValueError, 'signal signature is longer than the number of arguments provided'
elif len(sig) < len(args):
raise ValueError, 'signal signature is shorter than the number of arguments provided'
emit_signal.__name__ = func.__name__
emit_signal.__doc__ = func.__doc__
emit_signal._dbus_is_signal = True
emit_signal._dbus_interface = dbus_interface
emit_signal._dbus_signature = signature
emit_signal._dbus_args = args
return emit_signal
return decorator
def explicitly_pass_message(func):
func._dbus_pass_message = True
return func
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