SafeEyes/safeeyes/safeeyes/safeeyes

#!/usr/bin/env python2

# Safe Eyes is a utility to remind you to take break frequently
# to protect your eyes from eye strain.

# Copyright (C) 2016  Gobinath

# This program 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.

# This program 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/>.

import os
import gi
import json
import shutil
import errno
import dbus
from dbus.mainloop.glib import DBusGMainLoop

from BreakScreen import BreakScreen
from TrayIcon import TrayIcon
from SettingsDialog import SettingsDialog
from SafeEyesCore import SafeEyesCore
from Notification import Notification

gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

# Define necessary paths
bin_directory = os.path.dirname(os.path.realpath(__file__))
config_file_path = os.path.join(os.path.expanduser('~'), '.config/safeeyes/safeeyes.json')
style_sheet_path = os.path.join(os.path.expanduser('~'), '.config/safeeyes/style/safeeyes_style.css')
break_screen_glade = os.path.join(bin_directory, "glade/break_screen.glade")
settings_dialog_glade = os.path.join(bin_directory, "glade/settings_dialog.glade")
system_config_file_path = os.path.join(bin_directory, "config/safeeyes.json")
system_style_sheet_path = os.path.join(bin_directory, "config/style/safeeyes_style.css")
system_language_directory = os.path.join(bin_directory, "config/lang")

is_active = True

def show_settings():
	settings_dialog = SettingsDialog(config, language, save_settings, settings_dialog_glade)
	settings_dialog.show()

def show_notification():
	notification.show(config['pre_break_warning_time'])

def show_alert(message):
	notification.close()
	# Hide and show tray icon if strict break is on
	# This feature is required because, by disabling Safe Eyes,
	# user can skip the break.
	# if config['strict_break']:
	# 	tray_icon.hide_icon()
	break_screen.show_message(message)

def close_alert():
	# Hide and show tray icon if strict break is on
	# This feature is required because, by disabling Safe Eyes,
	# user can skip the break.
	# if config['strict_break']:
	# 	tray_icon.show_icon()
	break_screen.close()

def on_countdown(count):
	break_screen.show_count_down(count)

def on_quite():
	core.stop()
	notification.quite();
	Gtk.main_quit()

def handle_suspend_callback(sleeping):
	if sleeping:
		# Sleeping / suspending
		if is_active:
			core.stop()
	else:
		# Resume from sleep
		if is_active:
			core.start()

def handle_system_suspend():
	DBusGMainLoop(set_as_default=True)
	bus = dbus.SystemBus()
	bus.add_signal_receiver(handle_suspend_callback, 'PrepareForSleep', 'org.freedesktop.login1.Manager', 'org.freedesktop.login1')

def on_skipped():
	# Hide and show tray icon if strict break is on
	# This feature is required because, by disabling Safe Eyes,
	# user can skip the break.
	if config['strict_break']:
		tray_icon.show_icon()
	core.skip_break()

def save_settings(config):
	# Write the configuration to file
	with open(config_file_path, 'w') as config_file:
		json.dump(config, config_file, indent=4, sort_keys=True)
	
	# Restart the core and intialize the components
	core.initialize(config)
	break_screen.initialize(config)

def enable_safeeyes():
	is_active = True
	core.toggle_active_state()

def disable_safeeyes():
	is_active = False
	core.toggle_active_state()

def prepare_local_config_dir():
	config_dir_path = os.path.join(os.path.expanduser('~'), '.config/safeeyes/style')
	startup_dir_path = os.path.join(os.path.expanduser('~'), '.config/autostart')
	try:
		os.makedirs(config_dir_path)
	except OSError as exc:
		if exc.errno == errno.EEXIST and os.path.isdir(config_dir_path):
			pass
		else:
			raise

	if not os.path.isfile(config_file_path):
		shutil.copy2(system_config_file_path, config_file_path)

		try:
			os.makedirs(startup_dir_path)
		except OSError as exc:
			if exc.errno == errno.EEXIST and os.path.isdir(startup_dir_path):
				pass
			else:
				raise

		# Add to startup for the first time only
		try:
			os.symlink("/usr/share/applications/safeeyes.desktop", os.path.join(startup_dir_path, "safeeyes.desktop"))
		except OSError as exc:
			pass

	if not os.path.isfile(style_sheet_path):
		shutil.copy2(system_style_sheet_path, style_sheet_path)

def main():
	prepare_local_config_dir()

	global break_screen
	global core
	global notification
	global config
	global tray_icon
	global language

	# Read the configuration
	with open(config_file_path) as config_file:    
		config = json.load(config_file)
	
	language_file_path = os.path.join(system_language_directory, str(config['language']) + '.json')
	with open(language_file_path) as language_file:
		language = json.load(language_file)
	
	tray_icon = TrayIcon(language, show_settings, enable_safeeyes, disable_safeeyes, on_quite)
	break_screen = BreakScreen(on_skipped, break_screen_glade, style_sheet_path)
	break_screen.initialize(config, language)
	core = SafeEyesCore(show_notification, show_alert, close_alert, on_countdown)
	core.initialize(config, language)
	core.start()
	notification = Notification(language)
	
	handle_system_suspend()

	Gtk.main()

main()