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"""
Generate a palette using various backends.
"""
import logging
import os
import random
import re
import sys
from . import theme
from . import util
from .settings import CACHE_DIR, MODULE_DIR, __cache_version__
def list_backends():
"""List color backends."""
return [b.name.replace(".py", "") for b in
os.scandir(os.path.join(MODULE_DIR, "backends"))
if "__" not in b.name]
def colors_to_dict(colors, img):
"""Convert list of colors to pywal format."""
return {
"wallpaper": img,
"alpha": util.Color.alpha_num,
"special": {
"background": colors[0],
"foreground": colors[15],
"cursor": colors[15]
},
"colors": {
"color0": colors[0],
"color1": colors[1],
"color2": colors[2],
"color3": colors[3],
"color4": colors[4],
"color5": colors[5],
"color6": colors[6],
"color7": colors[7],
"color8": colors[8],
"color9": colors[9],
"color10": colors[10],
"color11": colors[11],
"color12": colors[12],
"color13": colors[13],
"color14": colors[14],
"color15": colors[15]
}
}
def generic_adjust(colors, light):
"""Generic color adjustment for themers."""
if light:
for color in colors:
color = util.saturate_color(color, 0.50)
color = util.darken_color(color, 0.4)
colors[0] = util.lighten_color(colors[0], 0.9)
colors[7] = util.darken_color(colors[0], 0.75)
colors[8] = util.darken_color(colors[0], 0.25)
colors[15] = colors[7]
else:
colors[0] = util.darken_color(colors[0], 0.75)
colors[7] = util.lighten_color(colors[0], 0.75)
colors[8] = util.lighten_color(colors[0], 0.25)
colors[15] = colors[7]
return colors
def cache_fname(img, backend, light, cache_dir):
"""Create the cache file name."""
color_type = "light" if light else "dark"
file_name = re.sub("[/|\\|.]", "_", img)
file_parts = [file_name, color_type, backend, __cache_version__]
return [cache_dir, "schemes", "%s_%s_%s_%s.json" % (*file_parts,)]
def get_backend(backend):
"""Figure out which backend to use."""
if backend == "random":
backends = list_backends()
random.shuffle(backends)
return backends[0]
return backend
def palette():
"""Generate a palette from the colors."""
for i in range(0, 16):
if i % 8 == 0:
print()
if i > 7:
i = "8;5;%s" % i
print("\033[4%sm%s\033[0m" % (i, " " * (80 // 20)), end="")
print("\n")
def get(img, light=False, backend="wal", cache_dir=CACHE_DIR):
"""Generate a palette."""
# home_dylan_img_jpg_backend_1.2.2.json
cache_name = cache_fname(img, backend, light, cache_dir)
cache_file = os.path.join(*cache_name)
if os.path.isfile(cache_file):
# Disable logging in theme.file().
logger = logging.getLogger()
logger.disabled = True
colors = theme.file(cache_file)
logger.disabled = False
colors["alpha"] = util.Color.alpha_num
logging.info("Found cached colorscheme.")
else:
logging.info("Generating a colorscheme.")
backend = get_backend(backend)
# Dynamically import the backend we want to use.
# This keeps the dependencies "optional".
try:
__import__("pywal.backends.%s" % backend)
except ImportError:
__import__("pywal.backends.wal")
backend = "wal"
logging.info("Using %s backend.", backend)
backend = sys.modules["pywal.backends.%s" % backend]
colors = colors_to_dict(getattr(backend, "get")(img, light), img)
util.save_file_json(colors, cache_file)
logging.info("Generation complete.")
return colors
def file(input_file):
"""Deprecated: symbolic link to --> theme.file"""
return theme.file(input_file)
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