44 lines
1.4 KiB
Python
44 lines
1.4 KiB
Python
import enum
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from .listener import Action
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from .application import StoppingSignal
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class State(enum.Enum):
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valid = "valid"
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invalid = "invalid"
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finished = "finished"
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class StateMachine:
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def __init__(self, application):
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self.state = State.valid
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self.mistake_position = None
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self.application = application
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def running(self):
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return self.state != State.finished
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def signal_stop(self):
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self.state = State.finished
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def signal_start(self):
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self.state = State.valid
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self.mistake_position = None
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def update(self, action, char):
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user_position = self.application.user_buffer.get_position()
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if self.state == State.invalid:
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if action in (Action.del_char, Action.del_word):
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if user_position <= self.mistake_position:
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self.mistake_position = None
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self.state = State.valid
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if self.state == State.valid:
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if action in (Action.add_char, Action.add_space, Action.add_newline):
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if char != self.application.reference_buffer.read(user_position - 1):
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self.mistake_position = user_position - 1
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self.state = State.invalid
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elif user_position == self.application.reference_buffer.get_lenght():
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self.state = State.finished
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def valid(self):
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return self.state in (State.valid, State.finished)
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