beefcarver
ec2ca72efb
A ladder is a hue walk, not a brightness walk, so painting the hot end backwards put the dim colour at the corner. Sort the ramp by stock brightness and follow the pane height for the bottom-left glow.
120 lines
3.6 KiB
Python
120 lines
3.6 KiB
Python
"""The colour palettes everything in the UI draws from.
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Every colour in Beefy Player is a stock ANSI palette *name*, never RGB, so the
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TUI adopts whatever colours the terminal is configured with. A palette here is
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therefore a short ladder of those names — the "gradient" is a quantised walk
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from the quiet end to the hot end, not an interpolation.
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The active palette drives the spectrum analyser, the album-art mosaic, the
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provider wordmarks and the pane corners; `c` cycles through them and the
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choice is remembered in the config file.
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"""
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from __future__ import annotations
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#: Dark → hot ladders of ANSI names. Sixteen of them: seven hue gradients, a
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#: few near-monochromes, and the original spectrum.
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PALETTES: dict[str, tuple[str, ...]] = {
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"spectrum": (
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"cyan",
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"blue",
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"magenta",
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"bright_magenta",
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"yellow",
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"bright_yellow",
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"red",
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),
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"rainbow": (
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"red",
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"bright_yellow",
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"bright_green",
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"bright_cyan",
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"bright_blue",
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"bright_magenta",
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),
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"ocean": (
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"bright_black",
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"blue",
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"bright_blue",
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"cyan",
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"bright_cyan",
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"bright_white",
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),
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"ember": (
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"bright_black",
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"red",
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"bright_red",
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"yellow",
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"bright_yellow",
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"bright_white",
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),
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"mint": (
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"bright_black",
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"green",
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"bright_green",
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"cyan",
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"bright_cyan",
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"bright_white",
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),
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"sunset": ("magenta", "bright_magenta", "red", "bright_red", "yellow"),
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"violet": ("blue", "bright_blue", "magenta", "bright_magenta", "bright_white"),
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"acid": ("bright_black", "green", "bright_green", "yellow", "bright_yellow"),
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"neon": (
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"bright_magenta",
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"bright_red",
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"bright_yellow",
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"bright_green",
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"bright_cyan",
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),
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"sand": ("bright_black", "yellow", "bright_yellow", "white", "bright_white"),
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"blood": ("bright_black", "red", "bright_red", "bright_magenta"),
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"forest": ("bright_black", "green", "bright_green", "yellow", "bright_white"),
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"ice": ("bright_white", "bright_cyan", "cyan", "bright_blue", "blue"),
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"steel": ("bright_black", "white", "bright_white", "bright_cyan"),
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"candy": ("magenta", "bright_magenta", "bright_cyan", "bright_yellow"),
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"mono": ("bright_black", "white", "bright_white"),
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}
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#: The stock names from dark to bright. These are xterm's default values in
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#: Rec. 601 luma order — the closest thing to a stock answer. A theme may
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#: disagree about the exact numbers, but the ordering is what the frame fades
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#: need: a ladder is a *hue* walk, so where it ends says nothing about which
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#: end is brighter.
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BRIGHTNESS: tuple[str, ...] = (
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"black",
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"blue",
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"red",
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"bright_red",
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"magenta",
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"bright_magenta",
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"bright_blue",
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"green",
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"bright_black",
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"cyan",
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"bright_green",
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"bright_cyan",
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"yellow",
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"white",
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"bright_yellow",
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"bright_white",
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)
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_RANK = {name: rank for rank, name in enumerate(BRIGHTNESS)}
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#: Cycle order for the palette key.
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PALETTE_ORDER: tuple[str, ...] = tuple(PALETTES)
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#: What you get until you press `c`.
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DEFAULT_PALETTE = "spectrum"
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def palette_stops(name: str | None) -> tuple[str, ...]:
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"""The ladder for ``name``, falling back to the default palette."""
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key = (name or "").strip().lower()
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return PALETTES.get(key, PALETTES[DEFAULT_PALETTE])
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def brightness(colour: str) -> int:
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"""How bright a stock name is: 0 (black) to 15 (bright white)."""
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return _RANK.get(colour.strip().lower(), 0)
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