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lightdm-webkit2-greeter/web-greeter/bridge/Greeter.py

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# -*- coding: utf-8 -*-
#
# Greeter.py
#
# Copyright © 2017 Antergos
# Copyright © 2021 JezerM
#
# This file is part of Web Greeter.
#
# Web Greeter 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.
#
# Web Greeter 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.
#
# The following additional terms are in effect as per Section 7 of the license:
#
# The preservation of all legal notices and author attributions in
# the material or in the Appropriate Legal Notices displayed
# by works containing it is required.
#
# You should have received a copy of the GNU General Public License
# along with Web Greeter; If not, see <http://www.gnu.org/licenses/>.
# Standard Lib
from browser.error_prompt import Dialog
import subprocess
import threading
# 3rd-Party Libs
import gi
gi.require_version('LightDM', '1')
from gi.repository import LightDM
from browser.bridge import Bridge, BridgeObject
from PyQt5.QtCore import QFileSystemWatcher, QVariant, QTimer
from config import web_greeter_config
from utils.battery import Battery
from utils.screensaver import reset_screensaver
import globals
# This Application
from . import (
language_to_dict,
layout_to_dict,
session_to_dict,
user_to_dict,
battery_to_dict,
logger
)
# import utils.battery as battery
LightDMGreeter = LightDM.Greeter()
LightDMUsers = LightDM.UserList()
def changeBrightness(method: str, quantity: int = None):
backlight = web_greeter_config["config"]["features"]["backlight"]
if not backlight["enabled"]:
return
if not quantity:
quantity = backlight["value"]
try:
steps = backlight["steps"]
child = subprocess.run(["xbacklight", method, str(quantity), "-steps", str(steps)])
if child.returncode == 1:
raise ChildProcessError("xbacklight returned 1")
except Exception as err:
logger.error("Brightness: {}".format(err))
else:
if globals.greeter:
globals.greeter.greeter.brightness_update.emit()
def increaseBrightness(quantity: int = None):
backlight = web_greeter_config["config"]["features"]["backlight"]
if not backlight["enabled"]:
return
if not quantity:
quantity = backlight["value"]
thread = threading.Thread(target=changeBrightness,
args=("-inc", quantity))
thread.start()
def decreaseBrightness(quantity: int = None):
backlight = web_greeter_config["config"]["features"]["backlight"]
if not backlight["enabled"]:
return
if not quantity:
quantity = backlight["value"]
thread = threading.Thread(target=changeBrightness,
args=("-dec", quantity))
thread.start()
def setBrightness(quantity: int = None):
backlight = web_greeter_config["config"]["features"]["backlight"]
if not backlight["enabled"]:
return
if not quantity:
quantity = backlight["value"]
thread = threading.Thread(target=changeBrightness,
args=("-set", quantity))
thread.start()
def getBrightness(self):
if self._config["features"]["backlight"]["enabled"] != True:
return -1
try:
level = subprocess.run(["xbacklight", "-get"], stdout=subprocess.PIPE,
stderr=subprocess.PIPE, text=True, check=True)
return int(level.stdout)
except Exception as err:
logger.error("Brightness: {}".format(err))
return -1
class Greeter(BridgeObject):
# LightDM.Greeter Signals
authentication_complete = Bridge.signal()
autologin_timer_expired = Bridge.signal()
idle = Bridge.signal()
reset = Bridge.signal()
show_message = Bridge.signal(str, LightDM.MessageType, arguments=('text', 'type'))
show_prompt = Bridge.signal(str, LightDM.PromptType, arguments=('text', 'type'))
brightness_update = Bridge.signal()
battery_update = Bridge.signal()
noop_signal = Bridge.signal()
property_changed = Bridge.signal()
_battery = None
def __init__(self, *args, **kwargs):
super().__init__(name='LightDMGreeter', *args, **kwargs)
self._config = web_greeter_config["config"]
self._shared_data_directory = ''
self._themes_directory = web_greeter_config["app"]["theme_dir"]
if self._config["features"]["battery"]:
self._battery = Battery()
try:
LightDMGreeter.connect_to_daemon_sync()
except Exception as err:
logger.error(err)
dia = Dialog(title="An error ocurred",
message="Detected a problem that could interfere with the system login process",
detail="LightDM: {0}\nYou can continue without major problems, but you won't be able to log in".format(err),
buttons=["Okay"])
dia.exec()
pass
self._connect_signals()
self._determine_shared_data_directory_path()
logger.debug("LightDM API connected")
def _determine_shared_data_directory_path(self):
user = LightDMUsers.get_users()[0]
user_data_dir = LightDMGreeter.ensure_shared_data_dir_sync(user.get_name())
self._shared_data_directory = user_data_dir.rpartition('/')[0]
def _connect_signals(self):
LightDMGreeter.connect(
'authentication-complete',
lambda greeter: self._emit_signal(self.authentication_complete)
)
LightDMGreeter.connect(
'autologin-timer-expired',
lambda greeter: self._emit_signal(self.autologin_timer_expired)
)
LightDMGreeter.connect('idle', lambda greeter: self._emit_signal(self.idle))
LightDMGreeter.connect('reset', lambda greeter: self._emit_signal(self.reset))
LightDMGreeter.connect(
'show-message',
lambda greeter, msg, mtype: self._emit_signal(self.show_message, msg, mtype)
)
LightDMGreeter.connect(
'show-prompt',
lambda greeter, msg, mtype: self._emit_signal(self.show_prompt, msg, mtype)
)
if self._battery:
self._battery.connect(lambda: self.battery_update.emit())
def _emit_signal(self, _signal, *args):
self.property_changed.emit()
QTimer().singleShot(300, lambda: _signal.emit(*args))
@Bridge.prop(str, notify=property_changed)
def authentication_user(self):
return LightDMGreeter.get_authentication_user() or ''
@Bridge.prop(bool, notify=noop_signal)
def autologin_guest(self):
return LightDMGreeter.get_autologin_guest_hint()
@Bridge.prop(int, notify=noop_signal)
def autologin_timeout(self):
return LightDMGreeter.get_autologin_timeout_hint()
@Bridge.prop(str, notify=noop_signal)
def autologin_user(self):
return LightDMGreeter.get_autologin_user_hint()
@Bridge.prop(QVariant, notify=battery_update)
def batteryData(self):
return battery_to_dict(self._battery)
@Bridge.prop(int, notify=brightness_update)
def brightness(self):
return getBrightness(self)
@brightness.setter
def brightness(self, quantity):
setBrightness(quantity)
@Bridge.prop(bool, notify=noop_signal)
def can_hibernate(self):
return LightDM.get_can_hibernate()
@Bridge.prop(bool, notify=noop_signal)
def can_restart(self):
return LightDM.get_can_restart()
@Bridge.prop(bool, notify=noop_signal)
def can_shutdown(self):
return LightDM.get_can_shutdown()
@Bridge.prop(bool, notify=noop_signal)
def can_suspend(self):
return LightDM.get_can_suspend()
@Bridge.prop(bool, notify=noop_signal)
def can_access_brightness(self):
return self._config["features"]["backlight"]["enabled"]
@Bridge.prop(bool, notify=noop_signal)
def can_access_battery(self):
return self._config["features"]["battery"]
@Bridge.prop(str, notify=noop_signal)
def default_session(self):
return LightDMGreeter.get_default_session_hint()
@Bridge.prop(bool, notify=noop_signal)
def has_guest_account(self):
return LightDMGreeter.get_has_guest_account_hint()
@Bridge.prop(bool, notify=noop_signal)
def hide_users_hint(self):
return LightDMGreeter.get_hide_users_hint()
@Bridge.prop(str, notify=noop_signal)
def hostname(self):
return LightDM.get_hostname()
@Bridge.prop(bool, notify=property_changed)
def in_authentication(self):
return LightDMGreeter.get_in_authentication()
@Bridge.prop(bool, notify=property_changed)
def is_authenticated(self):
return LightDMGreeter.get_is_authenticated()
@Bridge.prop(QVariant, notify=property_changed)
def language(self):
return language_to_dict(LightDM.get_language())
@Bridge.prop(QVariant, notify=noop_signal)
def languages(self):
return [language_to_dict(lang) for lang in LightDM.get_languages()]
@Bridge.prop(QVariant, notify=noop_signal)
def layout(self):
return layout_to_dict(LightDM.get_layout())
@layout.setter
def layout(self, layout):
if type(layout) != dict:
return False
lay = dict(
name = layout.get("name") or "",
description = layout.get("description") or "",
short_description = layout.get("short_description") or ""
)
return LightDM.set_layout(LightDM.Layout(**lay))
@Bridge.prop(QVariant, notify=noop_signal)
def layouts(self):
return [layout_to_dict(layout) for layout in LightDM.get_layouts()]
@Bridge.prop(bool, notify=noop_signal)
def lock_hint(self):
return LightDMGreeter.get_lock_hint()
@Bridge.prop(QVariant, notify=property_changed)
def remote_sessions(self):
return [session_to_dict(session) for session in LightDM.get_remote_sessions()]
@Bridge.prop(bool, notify=noop_signal)
def select_guest_hint(self):
return LightDMGreeter.get_select_guest_hint()
@Bridge.prop(str, notify=noop_signal)
def select_user_hint(self):
return LightDMGreeter.get_select_user_hint() or ''
@Bridge.prop(QVariant, notify=noop_signal)
def sessions(self):
return [session_to_dict(session) for session in LightDM.get_sessions()]
@Bridge.prop(str, notify=noop_signal)
def shared_data_directory(self):
return self._shared_data_directory
@Bridge.prop(bool, notify=noop_signal)
def show_manual_login_hint(self):
return LightDMGreeter.get_show_manual_login_hint()
@Bridge.prop(bool, notify=noop_signal)
def show_remote_login_hint(self):
return LightDMGreeter.get_show_remote_login_hint()
@Bridge.prop(str, notify=noop_signal)
def themes_directory(self):
return self._themes_directory
@Bridge.prop(QVariant, notify=noop_signal)
def users(self):
return [user_to_dict(user) for user in LightDMUsers.get_users()]
@Bridge.method(str)
def authenticate(self, username):
LightDMGreeter.authenticate(username)
self.property_changed.emit()
@Bridge.method()
def authenticate_as_guest(self):
LightDMGreeter.authenticate_as_guest()
self.property_changed.emit()
@Bridge.method(int)
def brightnessSet(self, quantity):
setBrightness(quantity)
@Bridge.method(int)
def brightnessIncrease(self, quantity):
increaseBrightness(quantity)
@Bridge.method(int)
def brightnessDecrease(self, quantity):
decreaseBrightness(quantity)
@Bridge.method()
def cancel_authentication(self):
LightDMGreeter.cancel_authentication()
self.property_changed.emit()
@Bridge.method()
def cancel_autologin(self):
LightDMGreeter.cancel_autologin()
self.property_changed.emit()
@Bridge.method(result=bool)
def hibernate(self):
return LightDM.hibernate()
@Bridge.method(str)
def respond(self, response):
LightDMGreeter.respond(response)
self.property_changed.emit()
@Bridge.method(result=bool)
def restart(self):
return LightDM.restart()
@Bridge.method(str)
def set_language(self, lang):
if self.is_authenticated:
LightDMGreeter.set_language(lang)
self.property_changed.emit()
@Bridge.method(result=bool)
def shutdown(self):
return LightDM.shutdown()
@Bridge.method(str, result=bool)
def start_session(self, session):
if not session.strip():
return
started = LightDMGreeter.start_session_sync(session)
if started or self.is_authenticated():
reset_screensaver()
return started
@Bridge.method(result=bool)
def suspend(self):
return LightDM.suspend()