Source code for rich.color

import platform
import re
from colorsys import rgb_to_hls
from enum import IntEnum
from functools import lru_cache
from typing import TYPE_CHECKING, NamedTuple, Optional, Tuple

from ._palettes import EIGHT_BIT_PALETTE, STANDARD_PALETTE, WINDOWS_PALETTE
from .color_triplet import ColorTriplet
from .terminal_theme import DEFAULT_TERMINAL_THEME

if TYPE_CHECKING:  # pragma: no cover
    from .terminal_theme import TerminalTheme


WINDOWS = platform.system() == "Windows"


[docs]class ColorSystem(IntEnum): """One of the 3 color system supported by terminals.""" STANDARD = 1 EIGHT_BIT = 2 TRUECOLOR = 3 WINDOWS = 4
[docs]class ColorType(IntEnum): """Type of color stored in Color class.""" DEFAULT = 0 STANDARD = 1 EIGHT_BIT = 2 TRUECOLOR = 3 WINDOWS = 4
ANSI_COLOR_NAMES = { "black": 0, "red": 1, "green": 2, "yellow": 3, "blue": 4, "magenta": 5, "cyan": 6, "white": 7, "bright_black": 8, "bright_red": 9, "bright_green": 10, "bright_yellow": 11, "bright_blue": 12, "bright_magenta": 13, "bright_cyan": 14, "bright_white": 15, "grey0": 16, "navy_blue": 17, "dark_blue": 18, "blue3": 20, "blue1": 21, "dark_green": 22, "deep_sky_blue4": 25, "dodger_blue3": 26, "dodger_blue2": 27, "green4": 28, "spring_green4": 29, "turquoise4": 30, "deep_sky_blue3": 32, "dodger_blue1": 33, "green3": 40, "spring_green3": 41, "dark_cyan": 36, "light_sea_green": 37, "deep_sky_blue2": 38, "deep_sky_blue1": 39, "spring_green2": 47, "cyan3": 43, "dark_turquoise": 44, "turquoise2": 45, "green1": 46, "spring_green1": 48, "medium_spring_green": 49, "cyan2": 50, "cyan1": 51, "dark_red": 88, "deep_pink4": 125, "purple4": 55, "purple3": 56, "blue_violet": 57, "orange4": 94, "grey37": 59, "medium_purple4": 60, "slate_blue3": 62, "royal_blue1": 63, "chartreuse4": 64, "dark_sea_green4": 71, "pale_turquoise4": 66, "steel_blue": 67, "steel_blue3": 68, "cornflower_blue": 69, "chartreuse3": 76, "cadet_blue": 73, "sky_blue3": 74, "steel_blue1": 81, "pale_green3": 114, "sea_green3": 78, "aquamarine3": 79, "medium_turquoise": 80, "chartreuse2": 112, "sea_green2": 83, "sea_green1": 85, "aquamarine1": 122, "dark_slate_gray2": 87, "dark_magenta": 91, "dark_violet": 128, "purple": 129, "light_pink4": 95, "plum4": 96, "medium_purple3": 98, "slate_blue1": 99, "yellow4": 106, "wheat4": 101, "grey53": 102, "light_slate_grey": 103, "medium_purple": 104, "light_slate_blue": 105, "dark_olive_green3": 149, "dark_sea_green": 108, "light_sky_blue3": 110, "sky_blue2": 111, "dark_sea_green3": 150, "dark_slate_gray3": 116, "sky_blue1": 117, "chartreuse1": 118, "light_green": 120, "pale_green1": 156, "dark_slate_gray1": 123, "red3": 160, "medium_violet_red": 126, "magenta3": 164, "dark_orange3": 166, "indian_red": 167, "hot_pink3": 168, "medium_orchid3": 133, "medium_orchid": 134, "medium_purple2": 140, "dark_goldenrod": 136, "light_salmon3": 173, "rosy_brown": 138, "grey63": 139, "medium_purple1": 141, "gold3": 178, "dark_khaki": 143, "navajo_white3": 144, "grey69": 145, "light_steel_blue3": 146, "light_steel_blue": 147, "yellow3": 184, "dark_sea_green2": 157, "light_cyan3": 152, "light_sky_blue1": 153, "green_yellow": 154, "dark_olive_green2": 155, "dark_sea_green1": 193, "pale_turquoise1": 159, "deep_pink3": 162, "magenta2": 200, "hot_pink2": 169, "orchid": 170, "medium_orchid1": 207, "orange3": 172, "light_pink3": 174, "pink3": 175, "plum3": 176, "violet": 177, "light_goldenrod3": 179, "tan": 180, "misty_rose3": 181, "thistle3": 182, "plum2": 183, "khaki3": 185, "light_goldenrod2": 222, "light_yellow3": 187, "grey84": 188, "light_steel_blue1": 189, "yellow2": 190, "dark_olive_green1": 192, "honeydew2": 194, "light_cyan1": 195, "red1": 196, "deep_pink2": 197, "deep_pink1": 199, "magenta1": 201, "orange_red1": 202, "indian_red1": 204, "hot_pink": 206, "dark_orange": 208, "salmon1": 209, "light_coral": 210, "pale_violet_red1": 211, "orchid2": 212, "orchid1": 213, "orange1": 214, "sandy_brown": 215, "light_salmon1": 216, "light_pink1": 217, "pink1": 218, "plum1": 219, "gold1": 220, "navajo_white1": 223, "misty_rose1": 224, "thistle1": 225, "yellow1": 226, "light_goldenrod1": 227, "khaki1": 228, "wheat1": 229, "cornsilk1": 230, "grey100": 231, "grey3": 232, "grey7": 233, "grey11": 234, "grey15": 235, "grey19": 236, "grey23": 237, "grey27": 238, "grey30": 239, "grey35": 240, "grey39": 241, "grey42": 242, "grey46": 243, "grey50": 244, "grey54": 245, "grey58": 246, "grey62": 247, "grey66": 248, "grey70": 249, "grey74": 250, "grey78": 251, "grey82": 252, "grey85": 253, "grey89": 254, "grey93": 255, }
[docs]class ColorParseError(Exception): """The color could not be parsed."""
RE_COLOR = re.compile( r"""^ \#([0-9a-f]{6})$| color\(([0-9]{1,3})\)$| rgb\(([\d\s,]+)\)$ """, re.VERBOSE, )
[docs]class Color(NamedTuple): """Terminal color definition.""" name: str """The name of the color (typically the input to Color.parse).""" type: ColorType """The type of the color.""" number: Optional[int] = None """The color number, if a standard color, or None.""" triplet: Optional[ColorTriplet] = None """A triplet of color components, if an RGB color.""" def __str__(self) -> str: """Render the color to the terminal.""" attrs = self.get_ansi_codes(foreground=True) return ( f"\x1b[{';'.join(attrs)}m⬤ \x1b[0m" f"<color {self.name!r} ({self.type.name.lower()})>" ) def __repr__(self) -> str: return f"<color {self.name!r} ({self.type.name.lower()})>" @property def system(self) -> ColorSystem: """Get the native color system for this color.""" if self.type == ColorType.DEFAULT: return ColorSystem.STANDARD return ColorSystem(int(self.type)) @property def is_system_defined(self) -> bool: """Check if the color is ultimately defined by the system.""" return self.system not in (ColorSystem.EIGHT_BIT, ColorSystem.TRUECOLOR) @property def is_default(self) -> bool: """Check if the color is a default color.""" return self.type == ColorType.DEFAULT
[docs] def get_truecolor( self, theme: "TerminalTheme" = None, foreground=True ) -> ColorTriplet: """Get an equivalent color triplet for this color. Args: theme (TerminalTheme, optional): Optional terminal theme, or None to use default. Defaults to None. foreground (bool, optional): True for a foreground color, or False for background. Defaults to True. Returns: ColorTriplet: A color triplet containing RGB components. """ if theme is None: theme = DEFAULT_TERMINAL_THEME if self.type == ColorType.TRUECOLOR: assert self.triplet is not None return self.triplet elif self.type == ColorType.EIGHT_BIT: assert self.number is not None return EIGHT_BIT_PALETTE[self.number] elif self.type == ColorType.STANDARD: assert self.number is not None return theme.ansi_colors[self.number] elif self.type == ColorType.WINDOWS: assert self.number is not None return STANDARD_PALETTE[self.number] else: # self.type == ColorType.DEFAULT: assert self.number is None return theme.foreground_color if foreground else theme.background_color
[docs] @classmethod def from_triplet(cls, triplet: "ColorTriplet") -> "Color": """Create a truecolor RGB color from a triplet of values. Args: triplet (ColorTriplet): A color triplet containing red, green and blue components. Returns: Color: A new color object. """ return cls(name=triplet.hex, type=ColorType.TRUECOLOR, triplet=triplet)
[docs] @classmethod def from_rgb(cls, red: float, green: float, blue: float) -> "Color": """Create a truecolor from three color components in the range(0->255). Args: red (float): Red component. green (float): Green component. blue (float): Blue component. Returns: Color: A new color object. """ return cls.from_triplet(ColorTriplet(int(red), int(green), int(blue)))
[docs] @classmethod def default(cls) -> "Color": """Get a Color instance representing the default color. Returns: Color: Default color. """ return cls(name="default", type=ColorType.DEFAULT)
[docs] @classmethod @lru_cache(maxsize=1024) def parse(cls, color: str) -> "Color": """Parse a color definition.""" original_color = color color = color.lower().strip() if color == "default": return cls(color, type=ColorType.DEFAULT) color_number = ANSI_COLOR_NAMES.get(color) if color_number is not None: return cls( color, type=(ColorType.STANDARD if color_number < 16 else ColorType.EIGHT_BIT), number=color_number, ) color_match = RE_COLOR.match(color) if color_match is None: raise ColorParseError(f"{original_color!r} is not a valid color") color_24, color_8, color_rgb = color_match.groups() if color_24: triplet = ColorTriplet( int(color_24[0:2], 16), int(color_24[2:4], 16), int(color_24[4:6], 16) ) return cls(color, ColorType.TRUECOLOR, triplet=triplet) elif color_8: number = int(color_8) if number > 255: raise ColorParseError(f"color number must be <= 255 in {color!r}") return cls( color, type=(ColorType.STANDARD if number < 16 else ColorType.EIGHT_BIT), number=number, ) else: # color_rgb: components = color_rgb.split(",") if len(components) != 3: raise ColorParseError( f"expected three components in {original_color!r}" ) red, green, blue = components triplet = ColorTriplet(int(red), int(green), int(blue)) if not all(component <= 255 for component in triplet): raise ColorParseError( f"color components must be <= 255 in {original_color!r}" ) return cls(color, ColorType.TRUECOLOR, triplet=triplet)
[docs] @lru_cache(maxsize=1024) def get_ansi_codes(self, foreground: bool = True) -> Tuple[str, ...]: """Get the ANSI escape codes for this color.""" _type = self.type if _type == ColorType.DEFAULT: return ("39" if foreground else "49",) elif _type == ColorType.WINDOWS: number = self.number assert number is not None return (str(30 + number if foreground else 40 + number),) elif _type == ColorType.STANDARD: number = self.number assert number is not None fore, back = (30, 40) if number < 8 else (82, 92) return (str(fore + number if foreground else back + number),) elif _type == ColorType.EIGHT_BIT: assert self.number is not None return ("38" if foreground else "48", "5", str(self.number)) else: # self.standard == ColorStandard.TRUECOLOR: assert self.triplet is not None red, green, blue = self.triplet return ("38" if foreground else "48", "2", str(red), str(green), str(blue))
[docs] @lru_cache(maxsize=1024) def downgrade(self, system: ColorSystem) -> "Color": """Downgrade a color system to a system with fewer colors.""" if self.type == ColorType.DEFAULT or self.type == system: return self # Convert to 8-bit color from truecolor color if system == ColorSystem.EIGHT_BIT and self.system == ColorSystem.TRUECOLOR: assert self.triplet is not None red, green, blue = self.triplet.normalized _h, l, s = rgb_to_hls(red, green, blue) # If saturation is under 10% assume it is grayscale if s < 0.1: gray = round(l * 25.0) if gray == 0: color_number = 16 elif gray == 25: color_number = 231 else: color_number = 231 + gray return Color(self.name, ColorType.EIGHT_BIT, number=color_number) color_number = ( 16 + 36 * round(red * 5.0) + 6 * round(green * 5.0) + round(blue * 5.0) ) return Color(self.name, ColorType.EIGHT_BIT, number=color_number) # Convert to standard from truecolor or 8-bit elif system == ColorSystem.STANDARD: if self.system == ColorSystem.TRUECOLOR: assert self.triplet is not None triplet = self.triplet else: # self.system == ColorSystem.EIGHT_BIT assert self.number is not None triplet = ColorTriplet(*EIGHT_BIT_PALETTE[self.number]) color_number = STANDARD_PALETTE.match(triplet) return Color(self.name, ColorType.STANDARD, number=color_number) elif system == ColorSystem.WINDOWS: if self.system == ColorSystem.TRUECOLOR: assert self.triplet is not None triplet = self.triplet else: # self.system == ColorSystem.EIGHT_BIT assert self.number is not None if self.number < 8: return Color(self.name, ColorType.WINDOWS, number=self.number) elif self.number < 16: return Color(self.name, ColorType.WINDOWS, number=self.number - 8) triplet = ColorTriplet(*EIGHT_BIT_PALETTE[self.number]) color_number = WINDOWS_PALETTE.match(triplet) return Color(self.name, ColorType.WINDOWS, number=color_number) return self
[docs]def parse_rgb_hex(hex_color: str) -> ColorTriplet: """Parse six hex characters in to RGB triplet.""" assert len(hex_color) == 6, "must be 6 characters" color = ColorTriplet( int(hex_color[0:2], 16), int(hex_color[2:4], 16), int(hex_color[4:6], 16) ) return color
[docs]def blend_rgb( color1: ColorTriplet, color2: ColorTriplet, cross_fade: float = 0.5 ) -> ColorTriplet: """Blend one RGB color in to another.""" r1, g1, b1 = color1 r2, g2, b2 = color2 new_color = ColorTriplet( int(r1 + (r2 - r1) * cross_fade), int(g1 + (g2 - g1) * cross_fade), int(b1 + (b2 - b1) * cross_fade), ) return new_color
if __name__ == "__main__": # pragma: no cover from .console import Console from .table import Table from .text import Text from . import box console = Console() table = Table(show_footer=False, show_edge=True) table.add_column("Color", width=10, overflow="ellipsis") table.add_column("Number", justify="right", style="yellow") table.add_column("Name", style="green") table.add_column("Hex", style="blue") table.add_column("RGB", style="magenta") colors = sorted((v, k) for k, v in ANSI_COLOR_NAMES.items()) for color_number, name in colors: color_cell = Text(" " * 10, style=f"on {name}") if color_number < 16: table.add_row(color_cell, f"{color_number}", Text(f'"{name}"')) else: color = EIGHT_BIT_PALETTE[color_number] table.add_row( color_cell, str(color_number), Text(f'"{name}"'), color.hex, color.rgb ) console.print(table)