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"""
Misc helper functions.
"""
import colorsys
import json
import logging
import os
import subprocess
import sys
class Color:
"""Color formats."""
alpha_num = "100"
def __init__(self, hex_color):
self.hex_color = hex_color
def __str__(self):
return self.hex_color
@property
def rgb(self):
"""Convert a hex color to rgb."""
return "%s,%s,%s" % (*hex_to_rgb(self.hex_color),)
@property
def xrgba(self):
"""Convert a hex color to xrdb rgba."""
return hex_to_xrgba(self.hex_color)
@property
def alpha(self):
"""Add URxvt alpha value to color."""
return "[%s]%s" % (self.alpha_num, self.hex_color)
@property
def octal(self):
"""Export color in octal"""
return "%s%s" % ("#", oct(int(self.hex_color[1:], 16))[2:])
@property
def octal_strip(self):
"""Strip '#' from octal color."""
return oct(int(self.hex_color[1:], 16))[2:]
@property
def strip(self):
"""Strip '#' from color."""
return self.hex_color[1:]
def read_file(input_file):
"""Read data from a file and trim newlines."""
with open(input_file, "r") as file:
return file.read().splitlines()
def read_file_json(input_file):
"""Read data from a json file."""
with open(input_file, "r") as json_file:
return json.load(json_file)
def read_file_raw(input_file):
"""Read data from a file as is, don't strip
newlines or other special characters.."""
with open(input_file, "r") as file:
return file.readlines()
def save_file(data, export_file):
"""Write data to a file."""
create_dir(os.path.dirname(export_file))
try:
with open(export_file, "w") as file:
file.write(data)
except PermissionError:
logging.warning("Couldn't write to %s.", export_file)
def save_file_json(data, export_file):
"""Write data to a json file."""
create_dir(os.path.dirname(export_file))
with open(export_file, "w") as file:
json.dump(data, file, indent=4)
def create_dir(directory):
"""Alias to create the cache dir."""
os.makedirs(directory, exist_ok=True)
def setup_logging():
"""Logging config."""
logging.basicConfig(format=("[%(levelname)s\033[0m] "
"\033[1;31m%(module)s\033[0m: "
"%(message)s"),
level=logging.INFO,
stream=sys.stdout)
logging.addLevelName(logging.ERROR, '\033[1;31mE')
logging.addLevelName(logging.INFO, '\033[1;32mI')
logging.addLevelName(logging.WARNING, '\033[1;33mW')
def hex_to_rgb(color):
"""Convert a hex color to rgb."""
return tuple(bytes.fromhex(color.strip("#")))
def hex_to_xrgba(color):
"""Convert a hex color to xrdb rgba."""
col = color.lower().strip("#")
return "%s%s/%s%s/%s%s/ff" % (*col,)
def rgb_to_hex(color):
"""Convert an rgb color to hex."""
return "#%02x%02x%02x" % (*color,)
def darken_color(color, amount):
"""Darken a hex color."""
color = [int(col * (1 - amount)) for col in hex_to_rgb(color)]
return rgb_to_hex(color)
def lighten_color(color, amount):
"""Lighten a hex color."""
color = [int(col + (255 - col) * amount) for col in hex_to_rgb(color)]
return rgb_to_hex(color)
def blend_color(color, color2):
"""Blend two colors together."""
r1, g1, b1 = hex_to_rgb(color)
r2, g2, b2 = hex_to_rgb(color2)
r3 = int(0.5 * r1 + 0.5 * r2)
g3 = int(0.5 * g1 + 0.5 * g2)
b3 = int(0.5 * b1 + 0.5 * b2)
return rgb_to_hex((r3, g3, b3))
def saturate_color(color, amount):
"""Saturate a hex color."""
r, g, b = hex_to_rgb(color)
r, g, b = [x/255.0 for x in (r, g, b)]
h, l, s = colorsys.rgb_to_hls(r, g, b)
s = amount
r, g, b = colorsys.hls_to_rgb(h, l, s)
r, g, b = [x*255.0 for x in (r, g, b)]
return rgb_to_hex((int(r), int(g), int(b)))
def rgb_to_yiq(color):
"""Sort a list of colors."""
return colorsys.rgb_to_yiq(*hex_to_rgb(color))
def disown(cmd):
"""Call a system command in the background,
disown it and hide it's output."""
subprocess.Popen(cmd,
stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL)
def get_pid(name):
"""Check if process is running by name."""
try:
subprocess.check_output(["pidof", "-s", name])
except subprocess.CalledProcessError:
return False
return True
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