ignore Wacom devices that are in pairing mode

When the device is in pairing mode (blinking blue), the manufacturer
data contains less than 7 fields. We should ignore those devices
as we are not supposed to pull pen data out of them.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>

tuhi.py

@@ -163,10 +163,21 @@ class Tuhi(GObject.Object):
         self._pairing_stop_handler = None
         self.bluez.stop_discovery()
 
+    @classmethod
+    def _is_pairing_device(cls, bluez_device):
+        if bluez_device.vendor_id != WACOM_COMPANY_ID:
+            return False
+
+        manufacturer_data = bluez_device.get_manufacturer_data(WACOM_COMPANY_ID)
+        return manufacturer_data is not None and len(manufacturer_data) == 4
+
     def _on_bluez_device_added(self, manager, bluez_device):
         if bluez_device.vendor_id != WACOM_COMPANY_ID:
             return
 
+        if Tuhi._is_pairing_device(bluez_device):
+            return
+
         tuhi_dbus_device = self.server.create_device(bluez_device)
         d = TuhiDevice(bluez_device, tuhi_dbus_device)
         self.devices[bluez_device.address] = d

tuhi/ble.py

@@ -140,6 +140,12 @@ class BlueZDevice(GObject.Object):
         return (self.interface.get_cached_property('Connected').unpack() and
                 self.interface.get_cached_property('ServicesResolved').unpack())
 
+    def get_manufacturer_data(self, vendor_id):
+        md = self.interface.get_cached_property('ManufacturerData')
+        if md is not None and vendor_id in md.keys():
+            return md[vendor_id]
+        return None
+
     def resolve(self, om):
         """
         Resolve the GattServices and GattCharacteristics. This function does