Demo of header-click in fzf

keyboard.py

import sys
from os.path import realpath
from subprocess import Popen, PIPE

FZFBIN = 'fzf'
THIS = f"{sys.executable} {realpath(__file__)}"

keyboard = """
` 1 2 3 4 5 6 7 8 9 0 - = BCK
TB q w e r t y u i o p [ ] \\
CAP a s d f g h j k l ; ' ENT
SHFT z x c v b n m , . / SHFT
C M {______________} M C <,^>
""".strip()

fzf = ' '.join([
    FZFBIN,
    '--reverse',
    '--header-lines=5',
    f'--bind "click-header:transform({THIS} \\$FZF_CLICK_HEADER_LINE \\$FZF_CLICK_HEADER_COLUMN)"',
])

if len(sys.argv) == 1:
    input = '\n'.join([ l.strip() for l in sys.stdin.readlines() ])
    input = keyboard + '\n' + input
    p = Popen(fzf, shell=True, stdout=PIPE, stdin=PIPE)
    out = p.communicate(input.encode())[0]
    print(out.strip().decode())

elif len(sys.argv) == 3:
    y, x = sys.argv[1:3]
    try:
        key = keyboard.split('\n')[int(y)-1][int(x)-1]
        if key in "BCK":
            print("backward-delete-char")
        elif key in "ENT":
            print("accept-or-print-query")
        elif key in "<,^>":
            print({
                "<": "backward-char", "^": "up",
                ">": "forward-char", ",": "down",
            }.get(key))
        elif not key.isupper() and key != " ":
            if key in "{_}":
                key = " "
            print(f"put({key})")
    except Exception as e:
        pass