289 lines
10 KiB
Python
289 lines
10 KiB
Python
#!/usr/bin/env python
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# Safe Eyes is a utility to remind you to take break frequently
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# to protect your eyes from eye strain.
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# Copyright (C) 2017 Gobinath
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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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# 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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# 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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SafeEyes connects all the individual components and provide the complete application.
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"""
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import atexit
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import logging
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from threading import Timer
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import dbus
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import gi
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from dbus.mainloop.glib import DBusGMainLoop
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from safeeyes import Utility
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from safeeyes.AboutDialog import AboutDialog
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from safeeyes.BreakScreen import BreakScreen
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from safeeyes.model import State
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from safeeyes.rpc import RPCServer
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from safeeyes.PluginManager import PluginManager
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from safeeyes.SafeEyesCore import SafeEyesCore
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from safeeyes.settings import SettingsDialog
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gi.require_version('Gtk', '3.0')
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from gi.repository import Gtk
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SAFE_EYES_VERSION = "2.0.6"
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class SafeEyes(object):
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"""
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This class represents a runnable Safe Eyes instance.
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"""
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def __init__(self, system_locale, config):
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self.active = False
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self.break_screen = None
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self.safe_eyes_core = None
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self.config = config
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self.context = {}
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self.plugins_manager = None
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self.settings_dialog_active = False
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self.rpc_server = None
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self._status = ''
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# Initialize the Safe Eyes Context
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self.context['version'] = SAFE_EYES_VERSION
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self.context['desktop'] = Utility.desktop_environment()
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self.context['locale'] = system_locale
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self.context['api'] = {}
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self.context['api']['show_settings'] = lambda: Utility.execute_main_thread(self.show_settings)
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self.context['api']['show_about'] = lambda: Utility.execute_main_thread(self.show_about)
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self.context['api']['enable_safeeyes'] = lambda next_break_time=-1: Utility.execute_main_thread(self.enable_safeeyes, next_break_time)
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self.context['api']['disable_safeeyes'] = lambda status: Utility.execute_main_thread(self.disable_safeeyes, status)
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self.context['api']['status'] = self.status
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self.context['api']['quit'] = lambda: Utility.execute_main_thread(self.quit)
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if self.config.get('persist_state'):
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self.context['session'] = Utility.open_session()
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else:
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self.context['session'] = {'plugin': {}}
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self.break_screen = BreakScreen(self.context, self.on_skipped, self.on_postponed, Utility.STYLE_SHEET_PATH)
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self.break_screen.initialize(self.config)
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self.plugins_manager = PluginManager(self.context, self.config)
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self.safe_eyes_core = SafeEyesCore(self.context)
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self.safe_eyes_core.on_pre_break += self.plugins_manager.pre_break
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self.safe_eyes_core.on_start_break += self.on_start_break
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self.safe_eyes_core.start_break += self.start_break
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self.safe_eyes_core.on_count_down += self.countdown
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self.safe_eyes_core.on_stop_break += self.stop_break
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self.safe_eyes_core.on_update_next_break += self.update_next_break
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self.safe_eyes_core.initialize(self.config)
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self.context['api']['take_break'] = lambda: Utility.execute_main_thread(self.safe_eyes_core.take_break)
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self.context['api']['has_breaks'] = self.safe_eyes_core.has_breaks
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self.context['api']['postpone'] = self.safe_eyes_core.postpone
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self.plugins_manager.init(self.context, self.config)
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atexit.register(self.persist_session)
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self.rpc_server = RPCServer(self.config.get('rpc_port'), self.context)
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self.rpc_server.start()
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def start(self):
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"""
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Start Safe Eyes
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"""
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if self.safe_eyes_core.has_breaks():
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self.active = True
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self.context['state'] = State.START
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self.plugins_manager.start() # Call the start method of all plugins
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self.safe_eyes_core.start()
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self.handle_system_suspend()
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def show_settings(self):
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"""
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Listen to tray icon Settings action and send the signal to Settings dialog.
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"""
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if not self.settings_dialog_active:
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logging.info("Show Settings dialog")
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self.settings_dialog_active = True
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settings_dialog = SettingsDialog(self.config, self.save_settings)
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settings_dialog.show()
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def show_about(self):
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"""
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Listen to tray icon About action and send the signal to About dialog.
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"""
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logging.info("Show About dialog")
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about_dialog = AboutDialog(SAFE_EYES_VERSION)
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about_dialog.show()
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def quit(self):
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"""
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Listen to the tray menu quit action and stop the core, notification and the app itself.
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"""
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logging.info("Quit Safe Eyes")
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self.context['state'] = State.QUIT
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self.plugins_manager.stop()
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self.safe_eyes_core.stop()
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self.plugins_manager.exit()
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self.rpc_server.stop()
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Gtk.main_quit()
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def handle_suspend_callback(self, sleeping):
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"""
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If the system goes to sleep, Safe Eyes stop the core if it is already active.
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If it was active, Safe Eyes will become active after wake up.
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"""
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if sleeping:
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# Sleeping / suspending
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if self.active:
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logging.info("Stop Safe Eyes due to system suspend")
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self.plugins_manager.stop()
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self.safe_eyes_core.stop()
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else:
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# Resume from sleep
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if self.active and self.safe_eyes_core.has_breaks():
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logging.info("Resume Safe Eyes after system wakeup")
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self.plugins_manager.start()
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self.safe_eyes_core.start()
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def handle_system_suspend(self):
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"""
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Setup system suspend listener.
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"""
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DBusGMainLoop(set_as_default=True)
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bus = dbus.SystemBus()
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bus.add_signal_receiver(self.handle_suspend_callback, 'PrepareForSleep', 'org.freedesktop.login1.Manager', 'org.freedesktop.login1')
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def on_skipped(self):
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"""
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Listen to break screen Skip action and send the signal to core.
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"""
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logging.info("User skipped the break")
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self.safe_eyes_core.skip()
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self.plugins_manager.stop_break()
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def on_postponed(self):
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"""
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Listen to break screen Postpone action and send the signal to core.
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"""
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logging.info("User postponed the break")
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self.safe_eyes_core.postpone()
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self.plugins_manager.stop_break()
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def save_settings(self, config):
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"""
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Listen to Settings dialog Save action and write to the config file.
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"""
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self.settings_dialog_active = False
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logging.info("Saving settings to safeeyes.json")
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# Stop the Safe Eyes core
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if self.active:
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self.plugins_manager.stop()
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self.safe_eyes_core.stop()
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# Write the configuration to file
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config.save()
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self.persist_session()
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logging.info("Initialize SafeEyesCore with modified settings")
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# Restart the core and intialize the components
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self.config = config
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self.safe_eyes_core.initialize(config)
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self.break_screen.initialize(config)
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self.plugins_manager.init(self.context, self.config)
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if self.active and self.safe_eyes_core.has_breaks():
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# 1 sec delay is required to give enough time for core to be stopped
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Timer(1.0, self.safe_eyes_core.start).start()
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self.plugins_manager.start()
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def enable_safeeyes(self, scheduled_next_break_time=-1):
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"""
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Listen to tray icon enable action and send the signal to core.
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"""
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if not self.active and self.safe_eyes_core.has_breaks():
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self.active = True
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self.safe_eyes_core.start(scheduled_next_break_time)
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self.plugins_manager.start()
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def disable_safeeyes(self, status=None):
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"""
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Listen to tray icon disable action and send the signal to core.
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"""
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if self.active:
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self.active = False
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self.plugins_manager.stop()
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self.safe_eyes_core.stop()
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if status is None:
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status = _('Disabled until restart')
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self._status = status
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def on_start_break(self, break_obj):
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"""
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Pass the break information to plugins.
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"""
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if not self.plugins_manager.start_break(break_obj):
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return False
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return True
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def start_break(self, break_obj):
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"""
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Pass the break information to break screen.
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"""
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# Get the HTML widgets content from plugins
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widget = self.plugins_manager.get_break_screen_widgets(break_obj)
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self.break_screen.show_message(break_obj, widget)
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def countdown(self, countdown, seconds):
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"""
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Pass the countdown to plugins and break screen.
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"""
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self.break_screen.show_count_down(countdown, seconds)
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self.plugins_manager.countdown(countdown, seconds)
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return True
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def update_next_break(self, break_obj, break_time):
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"""
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Update the next break to plugins and save the session.
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"""
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self.plugins_manager.update_next_break(break_obj, break_time)
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self._status = _('Next break at %s') % (Utility.format_time(break_time))
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if self.config.get('persist_state'):
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Utility.write_json(Utility.SESSION_FILE_PATH, self.context['session'])
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def stop_break(self):
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"""
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Stop the current break.
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"""
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self.break_screen.close()
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self.plugins_manager.stop_break()
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return True
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def take_break(self):
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"""
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Take a break now.
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"""
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self.safe_eyes_core.take_break()
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def status(self):
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"""
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Return the status of Safe Eyes.
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"""
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return self._status
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def persist_session(self):
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"""
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Save the session object to the session file.
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"""
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if self.config.get('persist_state'):
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Utility.write_json(Utility.SESSION_FILE_PATH, self.context['session'])
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else:
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Utility.delete(Utility.SESSION_FILE_PATH)
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