gistfile1.txt

#!/usr/bin/env python3

import asyncio
import iterm2
import sys
# This script was created with the "basic" environment which does not support adding dependencies
# with pip.

async def main(connection, argv):
    app = await iterm2.async_get_app(connection)

    # Create four split panes and make the bottom left one active.
    bottomLeft = app.current_terminal_window.current_tab.current_session
    bottomRight = await bottomLeft.async_split_pane(vertical=True)
    topLeft = await bottomLeft.async_split_pane(vertical=False, before=True)
    topRight = await bottomRight.async_split_pane(vertical=False, before=True)
    await bottomLeft.async_activate()
    broadcast_to = [ topLeft, topRight, bottomRight ]

    async def async_handle_keystroke(notification):
        """Called on each keystroke with iterm2.api_pb2.KeystrokeNotification"""
        if notification.keyCode == 0x35:
            # User pressed escape. Terminate script.
            return True
        for session in broadcast_to:
            await session.async_send_text(notification.characters)
        return False

    # Construct a pattern that matches all keystrokes except those with a Command modifier.
    # This prevents iTerm2 from handling them.
    pattern = iterm2.KeystrokePattern()
    pattern.keycodes.extend(range(0, 65536))
    pattern.forbidden_modifiers.extend([iterm2.MODIFIER_COMMAND])

    # This will block until async_handle_keystroke returns True.
    async with bottomLeft.get_keystroke_reader(patterns_to_ignore=[pattern]) as reader:
        done = False
        while not done:
            for keystroke in await reader.async_get():
                done = await async_handle_keystroke(keystroke)
                if done:
                    break

if __name__ == "__main__":
    iterm2.Connection().run(main, sys.argv)