glyph_support_request.py

'''
for https://github.com/adobe-fonts/source-code-pro/issues/247
check character support requests against code points present in font
'''

import sys
import unicodedata
from fontTools import ttLib


def get_cmap(font_path):
    try:
        font = ttLib.TTFont(font_path)
    except ttLib.TTLibError:
        return False
    char_map = font['cmap'].getBestCmap()
    return char_map.keys()


requests = {
    'Braille Patterns': range(0x2800, 0x28FF + 1),
    'Geometric Shapes': range(0x25A0, 0x25FF + 1),
    'Box Drawing and Block Elements': range(0x2500, 0x259F + 1),
}

cmap = get_cmap(sys.argv[-1])
for u_range, cp_range in requests.items():
    print(f'## {u_range}\n')
    print('| code point | character | name | supported |')
    print('| --- | --- | --- | --- | ')

    for cp in cp_range:
        char = chr(cp)
        print('|', end=' ')
        print('U+{:04X}'.format(ord(char)), end=' | ')
        print(char, end=' | ')
        print(unicodedata.name(char), end=' | ')

        if (ord(char) in cmap):
            print('✔', end=' | ')
        else:
            print('✘', end=' | ')
        print()
    print()