def from_string(cls, key_sequence_string):
modifiers_key_state = ModifiersKeyState()
func_pattern_match = cls.FUNC_PATTERN.match(key_sequence_string)
if func_pattern_match:
return cls(Function(func_pattern_match.group(cls.FUNC_NAME_STRING), func_pattern_match.group(cls.ARGS_STRING)))
pattern_match = cls.SURROUNDED_PATTERN.match(key_sequence_string)
if pattern_match:
key_string = pattern_match.group(cls.KEY_STRING)
if pattern_match.group(cls.WINDOWS_STRING):
modifiers_key_state.windows = True
if pattern_match.group(cls.ALT_STRING):
modifiers_key_state.alt = True
if pattern_match.group(cls.CONTROL_STRING):
modifiers_key_state.control = True
if pattern_match.group(cls.SHIFT_STRING):
modifiers_key_state.shift = True
else:
key_string = key_sequence_string
for key_class in cls.KEY_CLASSES:
key, shift = key_class.from_string(key_string, modifiers_key_state.shift)
if key is not None:
modifiers_key_state.shift = shift
return cls(key, modifiers_key_state.presses())
else:
return cls(NoneKey.NONE, modifiers_key_state.presses())
