plomlompom.com Git - plomrogue2/blob - plomrogue_client/tui.py

   1 #!/usr/bin/env python3
   2 import curses
   3
   4
   5
   6 class AbortOnGetkey(Exception):
   7     pass
   8
   9
  10
  11 class TUI:
  12
  13     def __init__(self):
  14         self._log = []
  15         self.do_refresh = True
  16         self.store_widechar = False
  17         curses.wrapper(self.run_loop)
  18
  19     def addstr(self, y, x, line, attr=0):
  20         if y < self.size.y - 1 or x + len(line) < self.size.x:
  21             self.stdscr.addstr(y, x, line, attr)
  22         else:  # workaround to <https://stackoverflow.com/q/7063128>
  23             cut_i = self.size.x - x - 1
  24             cut = line[:cut_i]
  25             last_char = line[cut_i]
  26             self.stdscr.addstr(y, self.size.x - 2, last_char, attr)
  27             self.stdscr.insstr(y, self.size.x - 2, ' ')
  28             self.stdscr.addstr(y, x, cut, attr)
  29
  30     def reset_size(self):
  31         from plomrogue.mapping import YX
  32         self.size = YX(*self.stdscr.getmaxyx())
  33         self.size = self.size - YX(self.size.y % 4, 0)
  34         self.size = self.size - YX(0, self.size.x % 4)
  35
  36     def log(self, msg):
  37         self._log += [msg]
  38         self.do_refresh = True
  39
  40     def init_loop(self):
  41         curses.curs_set(0)  # hide cursor
  42         self.stdscr.timeout(10)
  43         self.reset_size()
  44
  45     def get_key_and_keycode(self):
  46         try:
  47             key = self.stdscr.getkey()
  48         except curses.error:
  49             raise AbortOnGetkey
  50         keycode = None
  51         if len(key) == 1:
  52             keycode = ord(key)
  53             # workaround for <https://stackoverflow.com/a/56390915>
  54             if self.store_widechar:
  55                 self.store_widechar = False
  56                 key = bytes([195, keycode]).decode()
  57             if keycode == 195:
  58                 self.store_widechar = True
  59                 raise AbortOnGetkey
  60         return key, keycode
  61
  62     def run_loop(self, stdscr):
  63         self.stdscr = stdscr
  64         self.init_loop()
  65         while True:
  66             self.on_each_loop_start()
  67             for msg in self.socket.get_message():
  68                 self.handle_server_message(msg)
  69             if self.do_refresh:
  70                 self.stdscr.clear()
  71                 self.draw_screen()
  72                 self.do_refresh = False
  73             try:
  74                 key, keycode = self.get_key_and_keycode()
  75             except AbortOnGetkey:
  76                 continue
  77             self.on_key(key, keycode)
  78             self.do_refresh = True
  79
  80
  81
  82 def msg_into_lines_of_width(msg, width):
  83     chunk = ''
  84     lines = []
  85     x = 0
  86     for i in range(len(msg)):
  87         if x >= width or msg[i] == "\n":
  88             lines += [chunk]
  89             chunk = ''
  90             x = 0
  91             if msg[i] == "\n":
  92                 x -= 1
  93         if msg[i] != "\n":
  94             chunk += msg[i]
  95         x += 1
  96     lines += [chunk]
  97     return lines