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84 lines
2.5 KiB
Python
84 lines
2.5 KiB
Python
"""
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oec.terminal
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~~~~~~~~~~~~
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"""
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from coax import LoadControlRegister, Feature, PollAction, Control
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from .device import Device, UnsupportedDeviceError
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from .display import Dimensions, BufferedDisplay
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from .keyboard import Keyboard
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MODEL_DIMENSIONS = {
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2: Dimensions(24, 80),
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3: Dimensions(32, 80),
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4: Dimensions(43, 80),
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5: Dimensions(27, 132)
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}
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class Terminal(Device):
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"""The terminal."""
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def __init__(self, interface, device_address, terminal_id, extended_id, features, keymap):
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super().__init__(interface, device_address)
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self.terminal_id = terminal_id
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self.extended_id = extended_id
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self.features = features
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dimensions = MODEL_DIMENSIONS.get(terminal_id.model)
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if not dimensions:
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raise UnsupportedDeviceError(f'Terminal model {terminal_id.model} is not supported')
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self.control = Control(step_inhibit=False, display_inhibit=False,
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cursor_inhibit=False, cursor_reverse=False,
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cursor_blink=False)
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self.display = BufferedDisplay(self, dimensions, features.get(Feature.EAB))
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self.keyboard = Keyboard(keymap)
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self.alarm = False
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self.last_poll_keyboard_clicker = None
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def setup(self):
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"""Load registers and clear the display."""
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self.load_control_register()
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if self.display.has_eab:
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self.display.load_eab_mask(0xff)
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self.display.clear(clear_status_line=True)
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# Show the attached indicator on the status line.
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self.display.status_line.write_string(0, 'OEC')
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self.display.move_cursor(row=0, column=0)
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def get_poll_action(self):
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"""Get the POLL action."""
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poll_action = PollAction.NONE
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# Convert a queued alarm or keyboard clicker change to POLL action.
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if self.alarm:
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poll_action = PollAction.ALARM
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self.alarm = False
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elif self.keyboard.clicker != self.last_poll_keyboard_clicker:
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if self.keyboard.clicker:
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poll_action = PollAction.ENABLE_KEYBOARD_CLICKER
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else:
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poll_action = PollAction.DISABLE_KEYBOARD_CLICKER
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self.last_poll_keyboard_clicker = self.keyboard.clicker
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return poll_action
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def sound_alarm(self):
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"""Queue an alarm on next POLL command."""
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self.alarm = True
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def load_control_register(self):
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"""Execute a LOAD_CONTROL_REGISTER command."""
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self.execute(LoadControlRegister(self.control))
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