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"""Read UDT's palette output and render it as CSS custom properties.
UDT writes the structural palette to ~/.config/rofi/udt/palette.rasi and the
wallpaper accent to ~/.cache/udt/udt-accent.rasi. deck-it reads both rather
than restating the colours, so a scheme or wallpaper change reaches the tablet.
"""
import re
from pathlib import Path
PALETTE_LINE = re.compile(r"^\s*([a-z0-9]+)\s*:\s*(#[0-9a-fA-F]{6,8});", re.M)
ACCENT = re.compile(r"accent:\s*(#[0-9a-fA-F]{6,8})")
PALETTE_PATH = Path.home() / ".config" / "rofi" / "udt" / "palette.rasi"
ACCENT_PATH = Path.home() / ".cache" / "udt" / "udt-accent.rasi"
# Catppuccin Macchiato, used before UDT has ever generated its files.
FALLBACK = {
"base": "#24273a", "mantle": "#1e2030", "crust": "#181926",
"surface0": "#363a4f", "surface1": "#494d64", "surface2": "#5b6078",
"text": "#cad3f5", "subtext0": "#a5adcb", "subtext1": "#b8c0e0",
"overlay0": "#6e738d", "red": "#ed8796", "green": "#a6da95",
"yellow": "#eed49f", "teal": "#8bd5ca", "blue": "#8aadf4",
"lavender": "#b7bdf8", "peach": "#f5a97f", "mauve": "#c6a0f6",
"accent": "#b7bdf8",
}
def parse_palette(text: str) -> dict[str, str]:
return dict(PALETTE_LINE.findall(text))
def parse_accent(text: str) -> str | None:
m = ACCENT.search(text)
return m[1] if m else None
def css(colors: dict, accent: str | None) -> str:
lines = [":root {"]
lines += [f" --udt-{name}: {value};" for name, value in colors.items()]
lines.append(f" --udt-accent: {accent or FALLBACK['accent']};")
lines.append("}")
return "\n".join(lines) + "\n"
def load() -> str:
"""Render the live UDT palette as CSS, falling back if it is not installed."""
try:
colors = parse_palette(PALETTE_PATH.read_text())
except OSError:
colors = {}
if not colors:
colors = dict(FALLBACK)
try:
accent = parse_accent(ACCENT_PATH.read_text())
except OSError:
accent = None
return css(colors, accent)
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