Device dependent margins/config

src/labelle/lib/constants.py

@@ -13,7 +13,7 @@
 # either sysfs is unavailable or unusable by this script for some reason.
 # Please beware that DEV_NODE must be set to None when not used, else you will
 # be bitten by the NameError exception.
-from enum import IntEnum
+from enum import Enum, IntEnum
 from pathlib import Path
 
 import labelle.resources.fonts

src/labelle/lib/devices/device_manager.py

@@ -90,7 +90,7 @@ def find_and_select_device(self, patterns: list[str] | None = None) -> UsbDevice
         return dev
 
 
-def get_device_config_by_id(idValue: int) -> DeviceConfig:
+def get_device_config_by_id(idValue: int) -> DeviceConfig | None:
     """Get a labeler device config with USB ID.
 
     :param idValue: USB ID value

src/labelle/lib/devices/dymo_labeler.py

@@ -238,7 +238,7 @@ def _raw_print_label(self, lines: list[list[int]]):
 
 class DymoLabeler:
     _device: UsbDevice | None
-    _deviceConfig: DeviceConfig | None
+    _deviceConfig: DeviceConfig
     tape_size_mm: int
 
     LABELER_DISTANCE_BETWEEN_PRINT_HEAD_AND_CUTTER_MM = 8.1
@@ -254,14 +254,15 @@ def __init__(
 
         if self._device is not None:
             # Retrieve device config
-            self._deviceConfig = get_device_config_by_id(self._device.id_product)
+            foundConfig = get_device_config_by_id(self._device.id_product)
+            if foundConfig is not None:
+                self._deviceConfig = foundConfig
+            else:
+                raise ValueError(f"Unsupported device type {self._device.id_product}")
         else:
             # Use simulator config
             self._deviceConfig = SIMULATOR_CONFIG
 
-        if self._deviceConfig is None:
-            raise ValueError(f"Unsupported device type {device.id_product}")
-
         if tape_size_mm is None:
             tape_size_mm = self.DEFAULT_TAPE_SIZE_MM
         if tape_size_mm not in self._deviceConfig.supportedTapeSizes: