cola/cmd.py

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