Invert the luminosity of Wireshark packets (for dark themes)

wireshark-dark.py

#!/usr/bin/env python3
import fileinput
import re
from colorsys import *

def rgb_to_hsl(r, g, b):
    return hsv_to_hsl(*rgb_to_hsv(r, g, b))

def hsl_to_rgb(h, s, l):
    return hsv_to_rgb(*hsl_to_hsv(h, s, l))

def hsv_to_hsl(h, s, v):
    l = v - v * s / 2
    s = 0 if l == 0 or l == 1 else (v - l) / min(l, 1 - l)
    return h, s, l

def hsl_to_hsv(h, s, l):
    v = l + s * min(l, 1 - l)
    s = 0 if v == 0 else 2 - 2 * l / v
    return h, s, v

def process(rgb):
    rgb = [int(x) / 65535 for x in rgb]
    hsl = [*rgb_to_hsl(*rgb)]
    hsl[2] = 1 - hsl[2]
    return [round(x * 65535) for x in hsl_to_rgb(*hsl)]

for line in fileinput.input():
    if len(line) == 0 or line[0] == '#':
        continue

    # line format: @name@filter@[0,0,0][65535,65535,65535]
    colours = re.findall('\[(.*?)\]', line.split('@')[-1])
    bg, fg = [process(x.split(',')) for x in colours]
    new_colours = '[%d,%d,%d][%d,%d,%d]' % (*bg, *fg)
    print(re.sub('[^@]+$', new_colours, line))