code.delx.au - monosys/blob - set-font-xfce4-terminal

   1 #!/usr/bin/env python3
   2
   3 import configparser
   4 import math
   5 import os
   6 import sys
   7
   8 def main():
   9     action = parse_action()
  10
  11     if action == "+":
  12         update_font_size(get_size_increment)
  13     elif action == "-":
  14         update_font_size(get_size_decrement)
  15     else:
  16         update_font_size(lambda _: action)
  17
  18 def parse_action():
  19     if len(sys.argv) != 2:
  20         print_help_exit()
  21
  22     action = sys.argv[1]
  23     if action != "+" and action != "-" and not action.isdigit():
  24         print_help_exit()
  25
  26     if action.isdigit():
  27         action = int(action)
  28         if action < 1:
  29             print_help_exit()
  30
  31     return action
  32
  33 def print_help_exit():
  34     print("Usage: %s [+|-|22]", file=sys.stderr)
  35     sys.exit(1)
  36
  37 def get_size_increment(size):
  38     if size >= 40:
  39         return math.floor(size / 8) * 8 + 8
  40     if size >= 28:
  41         return math.floor(size / 4) * 4 + 4
  42     if size >= 18:
  43         return math.floor(size / 2) * 2 + 2
  44     return size + 1
  45
  46 def get_size_decrement(size):
  47     if size > 40:
  48         return math.ceil(size / 8) * 8 - 8
  49     if size > 28:
  50         return math.ceil(size / 4) * 4 - 4
  51     if size > 18:
  52         return math.ceil(size / 2) * 2 - 2
  53     return size - 1
  54
  55 def update_font_size(fn):
  56     filename = get_config_filename()
  57     config = configparser.RawConfigParser()
  58     config.optionxform = lambda key: key
  59     config.read(filename)
  60
  61     font_name, old_size = config["Configuration"]["FontName"].rsplit(" ", 1)
  62     new_size = fn(int(old_size))
  63     config["Configuration"]["FontName"] = "%s %s" % (font_name, new_size)
  64
  65     print("Updating font size:", old_size, "->", new_size)
  66
  67     with open(filename+".new", "w") as f:
  68         config.write(f)
  69     os.rename(filename+".new", filename)
  70
  71 def get_config_filename():
  72     xdg_config_dir = os.environ.get("XDG_CONFIG_HOME", None)
  73     if not xdg_config_dir:
  74         xdg_config_dir = os.path.expanduser("~/.config")
  75     return os.path.join(xdg_config_dir, "xfce4", "terminal", "terminalrc")
  76
  77
  78 if __name__ == "__main__":
  79     main()