Me trying to generate word lines for Discoed categories. I didn't succeed.

lineGenerator.py

import sys
from fontTools.ttLib import TTFont
from fontTools.ttLib.tables._c_m_a_p import CmapSubtable

font = TTFont('whitney.ttf')
cmap = font['cmap']
t = cmap.getcmap(3,1).cmap
s = font.getGlyphSet()
units_per_em = font['head'].unitsPerEm

# get width in points
def getTextWidth(text,pointSize):
    total = 0
    for c in text:
        if ord(c) in t and t[ord(c)] in s:
            total += s[t[ord(c)]].width
        else:
            total += s['.notdef'].width
    total = total*float(pointSize)/units_per_em;
    return total


FONT_SIZE= 12
BAR = '─' #the bar char (ASCII 196)
BAR_SIZE = getTextWidth(BAR, FONT_SIZE)
HAIR_SPACE = ' '
HAIR_SPACE_SIZE = getTextWidth(HAIR_SPACE, FONT_SIZE)
THIN_SPACE = ' '
out = f'{THIN_SPACE}{sys.argv[1]}{THIN_SPACE}' 
DISCORD_MAX_LENGTH = 18 # The max display length for categories in Discord
DISCORD_MAX_POINTS = BAR_SIZE*DISCORD_MAX_LENGTH

def build(s):
    print(s)
    global out_width
    out_width = getTextWidth(s, FONT_SIZE)
    diff = DISCORD_MAX_POINTS-out_width
    if diff > BAR_SIZE*2:
        s = f'{BAR}{s}{BAR}'
    elif diff < BAR_SIZE*2:
        arr = s.split(THIN_SPACE)
        s =  f'{arr[0]}{HAIR_SPACE}{THIN_SPACE}{arr[1]}{THIN_SPACE}{HAIR_SPACE}{arr[2]}'
    elif diff < HAIR_SPACE_SIZE*2:     
        arr = s.split(THIN_SPACE)
        s =  f'{arr[0]}{THIN_SPACE}{arr[1]}{THIN_SPACE}{HAIR_SPACE}{arr[2]}'
    if diff < 0:
        return s
    
    print(diff)
    build(s)

out = build(out)


print(f'Tolerance: {DISCORD_MAX_POINTS-out_width} zero is perfect')