A set of tools for configuring the Logitech G19 keyboard.
Based in:
https://github.com/Gnome15/gnome15
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118 lines
4.8 KiB
118 lines
4.8 KiB
# Gnome15 - Suite of tools for the Logitech G series keyboards and headsets
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# Copyright (C) 2010 Brett Smith <tanktarta@blueyonder.co.uk>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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'''
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This module is responsible for loading the available hardware drivers, and
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choosing the best one to use.
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The best driver is always used when no driver is yet configured, other the
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configured driver is always used if possible. If it is not available,
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or no longer supports the model for the associated device, then it will revert
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back to using the best driver.
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The "best driver" is simply the first driver that supports the associated
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device.
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'''
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import os
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import logging
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logger = logging.getLogger(__name__)
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# Find all drivers
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drivers_dir = os.path.realpath(os.path.join(os.path.dirname(__file__), "drivers"))
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logger.info("Loading drivers from %s", drivers_dir)
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imported_drivers = {}
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driverfiles = [fname[:-3] for fname in os.listdir(drivers_dir) if fname.endswith(".py") and fname.startswith("driver_")]
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for d in driverfiles:
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try :
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driver_mod = __import__("gnome15.drivers.%s" % d , fromlist=[])
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mod = getattr(getattr(driver_mod, "drivers"), d)
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imported_drivers[d] = mod
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except Exception as e:
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logger.warning("Failed to load driver.", exc_info = e)
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def get_driver_mod(driver_id):
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'''
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Get a driver module given it's ID.
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Keyword arguments:
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driver_id -- driver ID
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'''
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for driver_mod in imported_drivers.values():
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if driver_mod.id == driver_id:
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return driver_mod
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def get_driver(conf_client, device, on_close = None):
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'''
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Called by clients to create the configured driver. If the configured
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driver is not available, it will fallback to using the "best driver".
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Keyword arguments:
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conf_client -- configuration client
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device -- device to find driver for
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on_close -- callback passed to driver that is executed when the driver closes.
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'''
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driver_name = conf_client.get_string("/apps/gnome15/%s/driver" % device.uid)
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if not driver_name:
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# If no driver has yet been configured, always use the best driver
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driver = _get_best_driver(device, on_close)
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if driver == None:
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raise Exception(_("No drivers support the model %s") % device.model_id)
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logger.info("Using first available driver for %s, %s", device.model_id, driver.get_name())
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return driver
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driver_mod_key = "driver_" + driver_name
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if not driver_mod_key in imported_drivers:
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# If the previous driver is no longer installed, get the best remaining driver
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driver = _get_best_driver(device, on_close)
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if driver == None:
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raise Exception(_("Driver %s is not available. Do you have to appropriate package installed?") % driver_name)
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else:
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logger.info("Configured driver %s is not available, using %s instead",
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driver_mod_key,
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driver.get_name())
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else:
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driver = imported_drivers[driver_mod_key].Driver(device, on_close = on_close)
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if not device.model_id in driver.get_model_names():
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# If the configured driver is now incorrect for the device model, just use the best driver
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# If no driver has yet been configured, always use the best driver
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driver = _get_best_driver(device, on_close)
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if driver == None:
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raise Exception(_("No drivers support the model %s") % device.model_id)
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logger.warning("Ignoring configured driver %s, as the model is not supported by it." \
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"Looking for best driver", driver)
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return driver
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else:
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# Configured driver is OK to use
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return driver
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def _get_best_driver(device, on_close = None):
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'''
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Get the "best driver" available. This will be the first driver that
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supports the provided device.
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Keyword arguments:
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device -- device to find driver for
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on_close -- callback passed to driver that is executed when the driver closes.
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'''
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for driver_mod_key in imported_drivers:
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driver = imported_drivers[driver_mod_key].Driver(device, on_close = on_close)
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if device.model_id in driver.get_model_names():
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return driver
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