python-escpos/examples/codepage_tables.py

"""Prints code page tables.
"""

from __future__ import print_function

import six
import sys

from escpos import printer
from escpos.constants import CODEPAGE_CHANGE, ESC, CTL_LF, CTL_FF, CTL_CR, CTL_HT, CTL_VT


def main():
    dummy = printer.Dummy()

    dummy.hw('init')

    for codepage in sys.argv[1:] or ['USA']:
        dummy.set(height=2, width=2)
        dummy._raw(codepage + '\n\n\n')
        print_codepage(dummy, codepage)
        dummy._raw('\n\n')

    dummy.cut()

    print(dummy.output)


def print_codepage(printer, codepage):
    if codepage.isdigit():
        codepage = int(codepage)
        printer._raw(CODEPAGE_CHANGE + six.int2byte(codepage))
        printer._raw('after')
    else:
        printer.charcode(codepage)

    sep = ''

    # Table header
    printer.set(font='b')
    printer._raw('  {}\n'.format(sep.join(map(lambda s: hex(s)[2:], range(0, 16)))))
    printer.set()

    # The table
    for x in range(0, 16):
        # First column
        printer.set(font='b')
        printer._raw('{} '.format(hex(x)[2:]))
        printer.set()

        for y in range(0, 16):
            byte = six.int2byte(x * 16 + y)

            if byte in (ESC, CTL_LF, CTL_FF, CTL_CR, CTL_HT, CTL_VT):
                byte = ' '

            printer._raw(byte)
            printer._raw(sep)
        printer._raw('\n')


if __name__ == '__main__':
    main()