Refactor: Move Receiver instantiation to factory class

Related #2350

lib/logitech_receiver/receiver.py

@@ -31,6 +31,25 @@ _R = hidpp10_constants.REGISTERS
 _IR = hidpp10_constants.INFO_SUBREGISTERS
 
 
+class ReceiverFactory:
+    @staticmethod
+    def create_receiver(device_info, setting_callback=None):
+        """Opens a Logitech Receiver found attached to the machine, by Linux device path.
+
+        :returns: An open file handle for the found receiver, or ``None``.
+        """
+        try:
+            handle = _base.open_path(device_info.path)
+            if handle:
+                return Receiver(handle, device_info.path, device_info.product_id, setting_callback)
+        except OSError as e:
+            logger.exception("open %s", device_info)
+            if e.errno == _errno.EACCES:
+                raise
+        except Exception:
+            logger.exception("open %s", device_info)
+
+
 class Receiver:
     """A Unifying Receiver instance.
 
@@ -376,20 +395,3 @@ class Receiver:
     __repr__ = __str__
 
     __bool__ = __nonzero__ = lambda self: self.handle is not None
-
-    @classmethod
-    def open(self, device_info, setting_callback=None):
-        """Opens a Logitech Receiver found attached to the machine, by Linux device path.
-
-        :returns: An open file handle for the found receiver, or ``None``.
-        """
-        try:
-            handle = _base.open_path(device_info.path)
-            if handle:
-                return Receiver(handle, device_info.path, device_info.product_id, setting_callback)
-        except OSError as e:
-            logger.exception("open %s", device_info)
-            if e.errno == _errno.EACCES:
-                raise
-        except Exception:
-            logger.exception("open %s", device_info)

lib/solaar/cli/__init__.py

@@ -110,7 +110,7 @@ def _receivers(dev_path=None):
         if dev_path is not None and dev_path != dev_info.path:
             continue
         try:
-            r = _receiver.Receiver.open(dev_info)
+            r = _receiver.ReceiverFactory.create_receiver(dev_info)
             if logger.isEnabledFor(logging.DEBUG):
                 logger.debug("[%s] => %s", dev_info.path, r)
             if r:
@@ -125,7 +125,11 @@ def _receivers_and_devices(dev_path=None):
         if dev_path is not None and dev_path != dev_info.path:
             continue
         try:
-            d = _device.Device.open(dev_info) if dev_info.isDevice else _receiver.Receiver.open(dev_info)
+            if dev_info.isDevice:
+                d = _device.Device.open(dev_info)
+            else:
+                d = _receiver.ReceiverFactory.create_receiver(dev_info)
+
             if logger.isEnabledFor(logging.DEBUG):
                 logger.debug("[%s] => %s", dev_info.path, d)
             if d is not None:

lib/solaar/listener.py

@@ -244,7 +244,7 @@ def _start(device_info):
     assert _status_callback and _setting_callback
     isDevice = device_info.isDevice
     if not isDevice:
-        receiver = _receiver.Receiver.open(device_info, _setting_callback)
+        receiver = _receiver.ReceiverFactory.create_receiver(device_info, _setting_callback)
     else:
         receiver = _device.Device.open(device_info, _setting_callback)
         configuration.attach_to(receiver)