/usr/lib/python3/dist-packages/Onboard/UDevTracker.py is in onboard 1.4.1-2ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 | # -*- coding: utf-8 -*-
# Copyright © 2017 marmuta <marmvta@gmail.com>
#
# This file is part of Onboard.
#
# Onboard is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# Onboard is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from Onboard.utils import EventSource
import Onboard.osk as osk
import logging
_logger = logging.getLogger("UDevTracker")
from Onboard.Config import Config
config = Config()
class UDevTracker(EventSource):
""" Singleton class that keeps track of UDev devices. """
_event_names = ("keyboard-detection-changed",)
def __new__(cls, *args, **kwargs):
"""
Singleton magic.
"""
if not hasattr(cls, "self"):
cls.self = object.__new__(cls, *args, **kwargs)
cls.self.construct()
return cls.self
def __init__(self):
"""
Called multiple times, don't use this.
"""
pass
def construct(self):
"""
Singleton constructor, runs only once.
"""
EventSource.__init__(self, self._event_names)
self._udev = None
self._keyboard_device_detected = None
def cleanup(self):
EventSource.cleanup(self)
self._register_listeners(False)
def connect(self, event_name, callback):
EventSource.connect(self, event_name, callback)
self.update_event_sources()
def disconnect(self, event_name, callback):
had_listeners = self.has_listeners(self._event_names)
EventSource.disconnect(self, event_name, callback)
self.update_event_sources()
# help debugging disconnecting events on exit
if had_listeners and not self.has_listeners(self._event_names):
_logger.info("all listeners disconnected")
def update_event_sources(self):
register = self.has_listeners()
self._register_udev_listeners(register)
def _register_listeners(self, register):
self._register_udev_listeners(register)
def _register_udev_listeners(self, register):
if bool(self._udev) != register:
if register:
try:
self._udev = osk.UDev()
except:
self._udev = None
if self._udev:
self._udev.connect('uevent', self._on_udev_event)
config.auto_show. \
keyboard_device_detection_exceptions_notify_add(
lambda x: self._detect_keyboard_devices())
self._update_keyboard_device_detected()
else:
config.auto_show. \
keyboard_device_detection_exceptions_notify_remove(
lambda x: self._detect_keyboard_devices())
self._udev.disconnect('uevent', self._on_udev_event)
self._udev = None
self._keyboard_device_detected = None
def _on_udev_event(self, *args):
_logger.debug('_on_udev_event: {}'.format(args))
self._detect_keyboard_devices()
def _detect_keyboard_devices(self):
keyboard_detected_before = self.is_keyboard_device_detected()
self._update_keyboard_device_detected()
keyboard_detected = self.is_keyboard_device_detected()
if keyboard_detected != keyboard_detected_before:
_logger.debug('_detect_keyboard_devices: {}'
.format(keyboard_detected))
self.emit_async("keyboard-detection-changed", keyboard_detected)
def _update_keyboard_device_detected(self):
detected = None
if self._udev:
keyboard_devices = self.get_keyboard_devices()
_logger.debug("_update_keyboard_device_detected: "
"keyboard_devices={}"
.format(keyboard_devices))
detected = False
for device in keyboard_devices:
if device.id not in \
config.auto_show.keyboard_device_detection_exceptions:
detected = True
_logger.debug("_update_keyboard_device_detected: keyboard detected={}"
.format(detected))
self._keyboard_device_detected = detected
def is_keyboard_device_detected(self):
"""
Return value:
True = one or more keyboard devices detected
False = no keyboard device detected
None = unknown
"""
return self._keyboard_device_detected
def get_keyboard_devices(self):
if self._udev:
raw_devices = self._udev.get_keyboard_devices()
_logger.debug("get_keyboard_devices: "
"raw_devices={}".format(raw_devices))
devices = []
for i, d in enumerate(raw_devices):
device = UDevDevice()
name = d["NAME"].replace('"', '')
serial = d["ID_SERIAL"].replace('"', '')
device.id = (d["ID_VENDOR_ID"] + ":" +
d["ID_MODEL_ID"] + ":" +
(serial if serial
else name.replace(" ", "_")))
device.name = name
try:
device.usb_interface_num = int(d["ID_USB_INTERFACE_NUM"])
except ValueError:
device.usb_interface_num = 0
self.append_unique(devices, device)
return devices
return []
def append_unique(self, devices, device):
"""
For some devices osk_udev returns duplicate entries for different USB
interfaces. Filter those out and keep only USB interface 0.
"""
for i, d in enumerate(devices):
if d.id == device.id:
if device.usb_interface_num < d.usb_interface_num:
devices[i] = device
return
devices.append(device)
class UDevDevice:
id = ""
name = ""
usb_interface_num = 0
def __str__(self):
return "{}(id={} name={} " \
"usb_interface_num={})" \
.format(type(self).__name__,
self.id,
self.name,
self.usb_interface_num,
)
def __repr__(self):
return self.__str__()
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