Actions.py

   1 import Bindings, Node
   2
   3 class Action(Node.Node):
   4
   5     def __init__(self, name):
   6         Node.Node.__init__(self)
   7         self.name = name
   8
   9     def __call__(self, binding):
  10         raise NotImplementedError()
  11
  12     def bindings(self):
  13         return [ binding
  14                  for binding in self.owners
  15                  if isinstance(binding, Bindings.Binding) ]
  16
  17
  18 class _ActionRegistry(object):
  19
  20     def __init__(self):
  21         self._registry = {}
  22
  23     def register(self, action):
  24         self._registry[action.name] = action
  25
  26     def __getitem__(self, key):
  27         return self._registry[key]
  28
  29 Actions = _ActionRegistry()
  30
  31
  32 class Nop(Action):
  33
  34     def __init__(self, name='nop'):
  35         Action.__init__(self, name)
  36
  37     def __call__(self, binding):
  38         pass
  39
  40
  41 class Macro(Action):
  42
  43     _actions = Node.NodeList()
  44
  45     def __init__(self, name, actions):
  46         Action.__init__(self, name)
  47         for i in range(len(actions)):
  48             if type(actions[i]) is str:
  49                 actions[i] = Actions[actions[i]]
  50         self._actions = actions
  51
  52     def __call__(self, binding):
  53         for action in self._actions:
  54             action(binding)
  55
  56 class Command(Action):
  57
  58     def __init__(self, name, callable):
  59         Action.__init__(self, name)
  60         self._callable = callable
  61
  62     def __call__(self, binding):
  63         self._callable(binding)
  64
  65
  66 class ChangeBindingsAbsolute(Action):
  67
  68     def __init__(self, name, mapIndex, keymaps):
  69         Action.__init__(self, name)
  70         self._mapIndex = mapIndex
  71         self._keymaps = keymaps
  72
  73     def __call__(self, binding):
  74         binding.keymap().keylist().replaceFromIndex(self._mapIndex, self._keymaps)
  75
  76
  77 class ChangeBindingsRelative(Action):
  78
  79     def __init__(self, name, mapIndex, keymaps):
  80         Action.__init__(self, name)
  81         self._mapIndex = mapIndex
  82         self._keymaps = keymaps
  83
  84     def __call__(self, binding):
  85         keymap = binding.keymap()
  86         keymap.keylist().replaceFromIndex(keymap.index()+self._mapIndex, self._keymaps)
  87
  88 def action(func):
  89     action = Command(func.__name__, func)
  90     Actions.register(action)
  91     return func