498 lines
16 KiB
Python
498 lines
16 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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This module contains utility functions for Safe Eyes and its plugins.
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"""
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import errno
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import imp
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import json
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import locale
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import logging
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import os
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import shutil
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import subprocess
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import threading
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from distutils.version import LooseVersion
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from logging.handlers import RotatingFileHandler
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import babel.dates
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import gi
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gi.require_version('Gtk', '3.0')
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from gi.repository import Gtk
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from gi.repository import GLib
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gi.require_version('Gdk', '3.0')
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BIN_DIRECTORY = os.path.dirname(os.path.realpath(__file__))
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HOME_DIRECTORY = os.path.expanduser('~')
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CONFIG_DIRECTORY = os.path.join(HOME_DIRECTORY, '.config/safeeyes')
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CONFIG_FILE_PATH = os.path.join(CONFIG_DIRECTORY, 'safeeyes.json')
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CONFIG_RESOURCE = os.path.join(CONFIG_DIRECTORY, 'resource')
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SESSION_FILE_PATH = os.path.join(CONFIG_DIRECTORY, 'session.json')
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STYLE_SHEET_PATH = os.path.join(CONFIG_DIRECTORY, 'style/safeeyes_style.css')
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SYSTEM_CONFIG_FILE_PATH = os.path.join(BIN_DIRECTORY, "config/safeeyes.json")
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SYSTEM_STYLE_SHEET_PATH = os.path.join(BIN_DIRECTORY, "config/style/safeeyes_style.css")
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LOG_FILE_PATH = os.path.join(CONFIG_DIRECTORY, 'safeeyes.log')
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SYSTEM_PLUGINS_DIR = os.path.join(BIN_DIRECTORY, 'plugins')
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USER_PLUGINS_DIR = os.path.join(CONFIG_DIRECTORY, 'plugins')
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LOCALE_PATH = os.path.join(BIN_DIRECTORY, 'config/locale')
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DESKTOP_ENVIRONMENT = None
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def get_resource_path(resource_name):
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"""
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Return the user-defined resource if a system resource is overridden by the user.
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Otherwise, return the system resource. Return None if the specified resource does not exist.
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"""
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if resource_name is None:
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return None
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resource_location = os.path.join(CONFIG_RESOURCE, resource_name)
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if not os.path.isfile(resource_location):
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resource_location = os.path.join(BIN_DIRECTORY, 'resource', resource_name)
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if not os.path.isfile(resource_location):
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# Resource not found
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resource_location = None
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return resource_location
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def start_thread(target_function, **args):
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"""
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Execute the function in a separate thread.
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"""
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thread = threading.Thread(target=target_function, kwargs=args)
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thread.start()
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def execute_main_thread(target_function, args=None):
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"""
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Execute the given function in main thread.
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"""
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if args:
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GLib.idle_add(lambda: target_function(args))
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else:
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GLib.idle_add(target_function)
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def system_locale():
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"""
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Return the system locale. If not available, return en_US.UTF-8.
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"""
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try:
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locale.setlocale(locale.LC_ALL, '')
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sys_locale = locale.getlocale(locale.LC_TIME)[0]
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if not sys_locale:
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sys_locale = 'en_US.UTF-8'
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return sys_locale
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except BaseException:
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# Some systems does not return proper locale
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return 'en_US.UTF-8'
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def format_time(time):
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"""
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Format time based on the system time.
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"""
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sys_locale = system_locale()
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return babel.dates.format_time(time, format='short', locale=sys_locale)
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def mkdir(path):
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"""
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Create directory if not exists.
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"""
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try:
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os.makedirs(path)
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except OSError as exc:
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if exc.errno == errno.EEXIST and os.path.isdir(path):
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pass
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else:
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logging.error('Error while creating ' + str(path))
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raise
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def load_json(json_path):
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"""
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Load the JSON file from the given path.
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"""
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json_obj = None
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if os.path.isfile(json_path):
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try:
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with open(json_path) as config_file:
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json_obj = json.load(config_file)
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except BaseException:
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pass
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return json_obj
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def write_json(json_path, json_obj):
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"""
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Write the JSON object at the given path
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"""
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try:
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with open(json_path, 'w') as json_file:
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json.dump(json_obj, json_file, indent=4, sort_keys=True)
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except BaseException:
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pass
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def delete(file_path):
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"""
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Delete the given file or directory
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"""
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try:
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os.remove(file_path)
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except OSError:
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pass
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def check_plugin_dependencies(plugin_config):
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"""
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Check the plugin dependencies.
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"""
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# Check the desktop environment
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if plugin_config['dependencies']['desktop_environments']:
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# Plugin has restrictions on desktop environments
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if DESKTOP_ENVIRONMENT not in plugin_config['dependencies']['desktop_environments']:
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return _('Plugin does not support %s desktop environment') % DESKTOP_ENVIRONMENT
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# Check the Python modules
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for module in plugin_config['dependencies']['python_modules']:
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if not module_exist(module):
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return _("Please install the Python module '%s'") % module
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# Check the shell commands
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for command in plugin_config['dependencies']['shell_commands']:
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if not command_exist(command):
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return _("Please install the command-line tool '%s'") % command
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# Check the resources
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for resource in plugin_config['dependencies']['resources']:
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if get_resource_path(resource) is None:
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return _('Please add the resource %(resource)s to %(config_resource)s directory') % {'resource': resource, 'config_resource': CONFIG_RESOURCE}
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return None
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def load_plugins_config(safeeyes_config):
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"""
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Load all the plugins from the given directory.
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"""
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configs = []
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for plugin in safeeyes_config.get('plugins'):
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plugin_path = os.path.join(SYSTEM_PLUGINS_DIR, plugin['id'])
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if not os.path.isdir(plugin_path):
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# User plugin
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plugin_path = os.path.join(USER_PLUGINS_DIR, plugin['id'])
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plugin_config_path = os.path.join(plugin_path, 'config.json')
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plugin_icon_path = os.path.join(plugin_path, 'icon.png')
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plugin_module_path = os.path.join(plugin_path, 'plugin.py')
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if not os.path.isfile(plugin_module_path):
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return
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icon = None
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if os.path.isfile(plugin_icon_path):
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icon = plugin_icon_path
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else:
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icon = get_resource_path('ic_plugin.png')
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config = load_json(plugin_config_path)
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if config is None:
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continue
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dependency_description = check_plugin_dependencies(config)
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if dependency_description:
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plugin['enabled'] = False
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config['error'] = True
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config['meta']['description'] = dependency_description
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icon = get_resource_path('ic_warning.png')
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else:
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config['error'] = False
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config['id'] = plugin['id']
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config['icon'] = icon
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config['enabled'] = plugin['enabled']
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for setting in config['settings']:
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setting['safeeyes_config'] = plugin['settings']
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configs.append(config)
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return configs
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def desktop_environment():
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"""
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Detect the desktop environment.
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"""
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global DESKTOP_ENVIRONMENT
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desktop_session = os.environ.get('DESKTOP_SESSION')
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current_desktop = os.environ.get('XDG_CURRENT_DESKTOP')
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env = 'unknown'
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if desktop_session is not None:
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desktop_session = desktop_session.lower()
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if desktop_session in ['gnome', 'unity', 'budgie-desktop', 'cinnamon', 'mate', 'xfce4', 'lxde', 'pantheon', 'fluxbox', 'blackbox', 'openbox', 'icewm', 'jwm', 'afterstep', 'trinity', 'kde']:
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env = desktop_session
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elif desktop_session.startswith('xubuntu') or (current_desktop is not None and 'xfce' in current_desktop):
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env = 'xfce'
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elif desktop_session.startswith('lubuntu'):
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env = 'lxde'
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elif 'plasma' in desktop_session or desktop_session.startswith('kubuntu') or os.environ.get('KDE_FULL_SESSION') == 'true':
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env = 'kde'
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elif os.environ.get('GNOME_DESKTOP_SESSION_ID'):
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env = 'gnome'
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elif desktop_session.startswith('ubuntu'):
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env = 'unity'
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DESKTOP_ENVIRONMENT = env
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return env
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def execute_command(command, args=[]):
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"""
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Execute the shell command without waiting for its response.
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"""
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if command:
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command_to_execute = []
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if isinstance(command, str):
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command_to_execute.append(command)
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else:
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command_to_execute.extend(command)
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if args:
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command_to_execute.extend(args)
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try:
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subprocess.Popen(command_to_execute)
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except BaseException:
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logging.error('Error in executing the command ' + str(command))
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def command_exist(command):
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"""
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Check whether the given command exist in the system or not.
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"""
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if shutil.which(command):
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return True
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return False
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def module_exist(module):
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"""
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Check wther the given Python module exists or not.
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"""
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try:
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imp.find_module(module)
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return True
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except ImportError:
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return False
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def merge_configs(new_config, old_config):
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"""
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Merge the values of old_config into the new_config.
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"""
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new_config = new_config.copy()
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new_config.update(old_config)
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return new_config
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def initialize_safeeyes():
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"""
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Create the config file and style sheet in ~/.config/safeeyes directory.
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"""
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logging.info('Copy the config files to ~/.config/safeeyes')
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style_dir_path = os.path.join(HOME_DIRECTORY, '.config/safeeyes/style')
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startup_dir_path = os.path.join(HOME_DIRECTORY, '.config/autostart')
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# Remove the ~/.config/safeeyes directory
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delete(os.path.join(CONFIG_DIRECTORY, 'safeeyes.json'))
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# Remove the startup file
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delete(os.path.join(HOME_DIRECTORY, os.path.join(startup_dir_path, 'safeeyes.desktop')))
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# Create the ~/.config/safeeyes/style directory
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mkdir(style_dir_path)
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mkdir(startup_dir_path)
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# Copy the safeeyes.json
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shutil.copy2(SYSTEM_CONFIG_FILE_PATH, CONFIG_FILE_PATH)
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# Copy the new startup file
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try:
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os.symlink("/usr/share/applications/safeeyes.desktop", os.path.join(startup_dir_path, 'safeeyes.desktop'))
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except OSError:
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pass
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# Copy the new style sheet
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if not os.path.isfile(STYLE_SHEET_PATH):
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shutil.copy2(SYSTEM_STYLE_SHEET_PATH, STYLE_SHEET_PATH)
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def intialize_logging(debug):
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"""
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Initialize the logging framework using the Safe Eyes specific configurations.
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"""
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# Create the directory to store log file if not exist
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if not os.path.exists(CONFIG_DIRECTORY):
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try:
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os.makedirs(CONFIG_DIRECTORY)
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except OSError:
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pass
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# Configure logging.
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root_logger = logging.getLogger()
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log_formatter = logging.Formatter('%(asctime)s [%(levelname)s]:[%(threadName)s] %(message)s')
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# Append the logs and overwrite once reached 5MB
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file_handler = RotatingFileHandler(LOG_FILE_PATH, mode='a', maxBytes=5 * 1024 * 1024, backupCount=2, encoding=None, delay=0)
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file_handler.setFormatter(log_formatter)
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if debug:
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file_handler.setLevel(logging.DEBUG)
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root_logger.setLevel(logging.DEBUG)
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console_handler = logging.StreamHandler()
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console_handler.setFormatter(log_formatter)
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root_logger.addHandler(console_handler)
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else:
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file_handler.setLevel(logging.INFO)
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root_logger.setLevel(logging.INFO)
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root_logger.addHandler(file_handler)
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def __open_plugin_config(plugins_dir, plugin_id):
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"""
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Open the given plugin's configuration.
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"""
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plugin_config_path = os.path.join(plugins_dir, plugin_id, 'config.json')
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plugin_module_path = os.path.join(plugins_dir, plugin_id, 'plugin.py')
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if not os.path.isfile(plugin_config_path) or not os.path.isfile(plugin_module_path):
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# Either the config.json or plugin.py is not available
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return None
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return load_json(plugin_config_path)
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def __update_plugin_config(plugin, plugin_config, config):
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"""
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Update the plugin configuration.
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"""
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if plugin_config is None:
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config['plugins'].remove(plugin)
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else:
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if LooseVersion(plugin['version']) < LooseVersion(plugin_config['meta']['version']):
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# Update the configuration
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plugin['version'] = plugin_config['meta']['version']
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setting_ids = []
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# Add the new settings
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for setting in plugin_config['settings']:
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setting_ids.append(setting['id'])
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if plugin['settings'].get(setting['id'], None) is None:
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plugin['settings'][setting['id']] = setting['default']
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# Remove the removed ids
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keys_to_remove = []
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for key in plugin['settings']:
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if key not in setting_ids:
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keys_to_remove.append(key)
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for key in keys_to_remove:
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del plugin['settings'][key]
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def __add_plugin_config(plugin_id, plugin_config, safe_eyes_config):
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"""
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"""
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if plugin_config is None:
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return
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config = {}
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config['id'] = plugin_id
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config['enabled'] = False # By default plugins are disabled
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config['version'] = plugin_config['meta']['version']
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if plugin_config['settings']:
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config['settings'] = {}
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for setting in plugin_config['settings']:
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config['settings'][setting['id']] = setting['default']
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safe_eyes_config['plugins'].append(config)
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def merge_plugins(config):
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"""
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Merge plugin configurations with Safe Eyes configuration.
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"""
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system_plugins = None
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user_plugins = None
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# Load system plugins id
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if os.path.isdir(SYSTEM_PLUGINS_DIR):
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system_plugins = os.listdir(SYSTEM_PLUGINS_DIR)
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else:
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system_plugins = []
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# Load user plugins id
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if os.path.isdir(USER_PLUGINS_DIR):
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user_plugins = os.listdir(USER_PLUGINS_DIR)
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else:
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user_plugins = []
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# Create a list of existing plugins
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for plugin in config['plugins']:
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plugin_id = plugin['id']
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if plugin_id in system_plugins:
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plugin_config = __open_plugin_config(SYSTEM_PLUGINS_DIR, plugin_id)
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__update_plugin_config(plugin, plugin_config, config)
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system_plugins.remove(plugin_id)
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elif plugin_id in user_plugins:
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plugin_config = __open_plugin_config(USER_PLUGINS_DIR, plugin_id)
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__update_plugin_config(plugin, plugin_config, config)
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user_plugins.remove(plugin_id)
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else:
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config['plugins'].remove(plugin)
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# Add all system plugins
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for plugin_id in system_plugins:
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plugin_config = __open_plugin_config(SYSTEM_PLUGINS_DIR, plugin_id)
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__add_plugin_config(plugin_id, plugin_config, config)
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# Add all user plugins
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for plugin_id in user_plugins:
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plugin_config = __open_plugin_config(USER_PLUGINS_DIR, plugin_id)
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__add_plugin_config(plugin_id, plugin_config, config)
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def open_session():
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"""
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Open the last session.
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"""
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logging.info('Reading the session file')
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session = load_json(SESSION_FILE_PATH)
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if session is None:
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session = {'plugin': {}}
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return session
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def create_gtk_builder(glade_file):
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"""
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Create a Gtk builder and load the glade file.
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"""
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builder = Gtk.Builder()
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builder.set_translation_domain('safeeyes')
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builder.add_from_file(glade_file)
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# Tranlslate all sub components
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for obj in builder.get_objects():
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if (not isinstance(obj, Gtk.SeparatorMenuItem)) and hasattr(obj, "get_label"):
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label = obj.get_label()
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if label is not None:
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obj.set_label(_(label))
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elif hasattr(obj, "get_title"):
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title = obj.get_title()
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if title is not None:
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obj.set_title(_(title))
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return builder
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