cola/cmd.py

   1 """Base Command class"""
   2 from __future__ import division, absolute_import, unicode_literals
   3
   4
   5 class Command(object):
   6     """Mixin interface for commands"""
   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     # pylint: disable=no-self-use
  20     def do(self):
  21         """Execute the command"""
  22         return
  23
  24     # pylint: disable=no-self-use
  25     def undo(self):
  26         """Undo the command"""
  27         return
  28
  29
  30 class ContextCommand(Command):
  31     """Base class for commands that operate on a context"""
  32
  33     def __init__(self, context):
  34         self.context = context
  35         self.model = context.model
  36         self.cfg = context.cfg
  37         self.git = context.git
  38         self.selection = context.selection
  39         self.fsmonitor = context.fsmonitor