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     # pylint: disable=no-self-use
  21     def do(self):
  22         """Execute the command"""
  23         return
  24
  25     # pylint: disable=no-self-use
  26     def undo(self):
  27         """Undo the command"""
  28         return
  29
  30
  31 class ContextCommand(Command):
  32     """Base class for commands that operate on a context"""
  33
  34     def __init__(self, context):
  35         self.context = context
  36         self.model = context.model
  37         self.cfg = context.cfg
  38         self.git = context.git
  39         self.selection = context.selection
  40         self.fsmonitor = context.fsmonitor