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
|
#!/usr/bin/env python3
# File: logout-manager-ncurses
# License: MIT
# Author: adamlamers, bgstack15
# Startdate: 2020-03-09 17:06
# Title: ncurses based logout manager
# Usage:
# logout-manager-ncurses
# Reference:
# https://docs.python.org/3/howto/curses.html
# ripped straight from http://adamlamers.com/post/FTPD9KNRA8CT
# https://stackoverflow.com/questions/3061/calling-a-function-of-a-module-by-using-its-name-a-string/12025554#12025554
# https://robinislam.me/blog/reading-environment-variables-in-python/
# Improve:
# Dependencies:
# dep-devuan: python3-dotenv
# Documentation:
# Improvements for CursesMenu class over origin:
# accepts number key inputs
# accepts enabled attribute
# add "zeroindex" bool
import curses, os, platform, sys
from dotenv import load_dotenv
# all this to load the libpath
try:
defaultdir="/etc/sysconfig"
thisplatform = platform.platform().lower()
if 'debian' in thisplatform or 'devuan' in thisplatform:
defaultdir="/etc/default"
# load_dotenv keeps existing environment variables as higher precedent
load_dotenv(os.path.join(defaultdir,"logout-manager"))
except:
pass
if 'LOGOUT_MANAGER_LIBPATH' in os.environ:
for i in os.environ['LOGOUT_MANAGER_LIBPATH'].split(":"):
sys.path.append(i)
import lmlib
class CursesMenu(object):
INIT = {'type' : 'init'}
def __init__(self, menu_options):
self.screen = curses.initscr()
self.menu_options = menu_options
self.selected_option = 0
self._previously_selected_option = None
self.running = True
self._zero_offset = 1
try:
self._zero_offset = 0 if bool(self.menu_options['zeroindex']) else 1
except:
pass
#init curses and curses input
curses.noecho()
curses.cbreak()
curses.start_color()
curses.curs_set(0) #Hide cursor
self.screen.keypad(1)
#set up color pair for highlighted option
curses.init_pair(1, curses.COLOR_BLACK, curses.COLOR_WHITE)
self.hilite_color = curses.color_pair(1)
self.normal_color = curses.A_NORMAL
def prompt_selection(self, parent=None):
if parent is None:
lastoption = "Cancel"
else:
lastoption = "Return to previous menu ({})".format(parent['title'])
option_count = len(self.menu_options['options'])
input_key = None
ENTER_KEY = ord('\n')
NUM_KEYS = [ord(str(i)) for i in range(self._zero_offset,option_count+1+self._zero_offset)]
done = False
while not done:
if self.selected_option != self._previously_selected_option:
self._previously_selected_option = self.selected_option
self.screen.border(0)
self._draw_title()
for option in range(option_count):
if self.selected_option == option:
self._draw_option(option, self.hilite_color)
else:
self._draw_option(option, self.normal_color)
if self.selected_option == option_count:
self.screen.addstr(4 + option_count, 4, "{:2} - {}".format(option_count+self._zero_offset,
lastoption), self.hilite_color)
else:
self.screen.addstr(4 + option_count, 4, "{:2} - {}".format(option_count+self._zero_offset,
lastoption), self.normal_color)
max_y, max_x = self.screen.getmaxyx()
if input_key is not None:
self.screen.addstr(max_y-3, max_x - 5, "{:3}".format(self.selected_option+self._zero_offset))
self.screen.refresh()
input_key = self.screen.getch()
down_keys = [curses.KEY_DOWN, ord('j')]
up_keys = [curses.KEY_UP, ord('k')]
exit_keys = [ord('q')]
if input_key in down_keys:
if self.selected_option < option_count:
self.selected_option += 1
else:
self.selected_option = 0
if input_key in up_keys:
if self.selected_option > 0:
self.selected_option -= 1
else:
self.selected_option = option_count
if input_key in exit_keys:
self.selected_option = option_count #auto select exit and return
break
if input_key == ENTER_KEY or input_key in NUM_KEYS:
if input_key in NUM_KEYS:
self.selected_option=int(chr(input_key))-self._zero_offset
done = True
try:
done = self.menu_options['options'][self.selected_option]['enabled']
except:
pass
return self.selected_option
def _draw_option(self, option_number, style):
thistext = self.menu_options['options'][option_number]['title']
try:
if self.menu_options['options'][option_number]['enabled'] == False: thistext += " (disabled)"
except:
pass
self.screen.addstr(4 + option_number,
4,
"{:2} - {}".format(option_number+self._zero_offset, thistext),
style)
def _draw_title(self):
self.screen.addstr(2, 2, self.menu_options['title'], curses.A_STANDOUT)
self.screen.addstr(3, 2, self.menu_options['subtitle'], curses.A_BOLD)
def display(self):
selected_option = self.prompt_selection()
i, _ = self.screen.getmaxyx()
curses.endwin()
#os.system('clear')
if selected_option < len(self.menu_options['options']):
selected_opt = self.menu_options['options'][selected_option]
return selected_opt
else:
self.running = False
return {'title' : 'Cancel', 'type' : 'exitmenu'}
# load configs
config = lmlib.Initialize_config(os.environ['LOGOUT_MANAGER_CONF'])
actions = lmlib.Actions
# MAIN LOOP
menu = {
'title' : 'Logout Manager',
'type' : 'menu',
'subtitle' : 'Use arrows or number keys',
'zeroindex' : False,
'options' : [
{'title': 'Lock', 'type': 'action', 'action': 'lock'},
{'title': 'Logout', 'type': 'action', 'action': 'logout'},
{'title': 'Hibernate', 'type': 'action', 'action': 'hibernate', 'enabled': config.can_hibernate},
{'title': 'Shutdown', 'type': 'action', 'action': 'shutdown'},
{'title': 'Reboot', 'type': 'action', 'action': 'reboot'}
]
}
m = CursesMenu(menu)
selected_action = m.display()
if selected_action['type'] == 'exitmenu':
print("Cancel any logout action.")
elif selected_action['type'] == 'command':
os.system(selected_action['command'])
elif selected_action['type'] == 'action':
#a = selected_action['action']:
func = getattr(globals()['actions'],selected_action['action'])
func(config)
|
