WIP: initial work for ncurses

   ripped entirely from http://adamlamers.com/post/FTPD9KNRA8CT
   and added numeral support, 1-9.

1 files changed, 163 insertions, 0 deletions

diff --git a/logout-manager-ncurses.py b/logout-manager-ncurses.py
new file mode 100755
index 0000000..7356569
--- /dev/null
+++ b/logout-manager-ncurses.py
@@ -0,0 +1,163 @@
+#!/usr/bin/env python3
+# File: logout-manager-tui.py
+# License: MIT
+# Author: adamlamers, bgstack15
+# Startdate: 2020-03-09 17:06
+# Title: ncurses based logout manager
+# Usage:
+#
+# 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
+# Improve:
+#    add "disabled" option in menu, with default=enabled
+# Documentation:
+
+import curses, sys, os
+sys.path.append("/home/bgirton/dev/logout-manager")
+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
+
+      #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('1')]
+      #NUM_KEYS = [ord(1),ord(2)...]
+      NUM_KEYS = [ord(str(i)) for i in range(1,option_count+2)]
+      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(5 + option_count, 4, "{:2} - {}".format(option_count+1,
+               lastoption), self.hilite_color)
+         else:
+            self.screen.addstr(5 + option_count, 4, "{:2} - {}".format(option_count+1,
+               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.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))-1
+            done = True
+      return self.selected_option
+
+   def _draw_option(self, option_number, style):
+      self.screen.addstr(5 + option_number,
+                     4,
+                     "{:2} - {}".format(option_number+1, self.menu_options['options'][option_number]['title']),
+                     style)
+
+   def _draw_title(self):
+      self.screen.addstr(2, 2, self.menu_options['title'], curses.A_STANDOUT)
+      self.screen.addstr(4, 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'}
+
+menu = {'title' : 'Logout Manager',
+      'type' : 'menu',
+      'subtitle' : 'Use arrows or number keys'}
+
+option_1 = {'title' : 'Hello World',
+         'type' : 'command',
+         'command' : 'echo Hello World!'}
+
+# build menu object from config.
+config = lmlib.Initialize_config()
+actions = lmlib.Actions
+
+menu['options'] = [
+      {'title': 'Lock',      'type': 'action', 'action': 'lock'},
+      {'title': 'Logout',    'type': 'action', 'action': 'logout'},
+      {'title': 'Hibernate', 'type': 'action', 'action': '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("Cancelled")
+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)