cola/cmd.py

   1 """Base Command class"""
   2
   3
   4 class Command:
   5     """Mixin interface for commands"""
   6
   7     UNDOABLE = False
   8
   9     @staticmethod
  10     def name():
  11         """Return the command's name"""
  12         return '(undefined)'
  13
  14     @classmethod
  15     def is_undoable(cls):
  16         """Can this be undone?"""
  17         return cls.UNDOABLE
  18
  19     def do(self):
  20         """Execute the command"""
  21         return
  22
  23     def undo(self):
  24         """Undo the command"""
  25         return
  26
  27
  28 class ContextCommand(Command):
  29     """Base class for commands that operate on a context"""
  30
  31     def __init__(self, context):
  32         self.context = context
  33         self.model = context.model
  34         self.cfg = context.cfg
  35         self.git = context.git
  36         self.selection = context.selection
  37         self.fsmonitor = context.fsmonitor