color.lua

b.color = {}

b.color.names = {
	-- CSS
	aliceblue = "#f0f8ff",
	antiquewhite = "#faebd7",
	aqua = "#00ffff",
	aquamarine = "#7fffd4",
	azure = "#f0ffff",
	beige = "#f5f5dc",
	bisque = "#ffe4c4",
	black = "#000000",
	blanchedalmond = "#ffebcd",
	blue = "#0000ff",
	blueviolet = "#8a2be2",
	brown = "#a52a2a",
	burlywood = "#deb887",
	cadetblue = "#5f9ea0",
	chartreuse = "#7fff00",
	chocolate = "#d2691e",
	coral = "#ff7f50",
	cornflowerblue = "#6495ed",
	cornsilk = "#fff8dc",
	crimson = "#dc143c",
	cyan = "#00ffff",
	darkblue = "#00008b",
	darkcyan = "#008b8b",
	darkgoldenrod = "#b8860b",
	darkgray = "#a9a9a9",
	darkgreen = "#006400",
	darkgrey = "#a9a9a9",
	darkkhaki = "#bdb76b",
	darkmagenta = "#8b008b",
	darkolivegreen = "#556b2f",
	darkorange = "#ff8c00",
	darkorchid = "#9932cc",
	darkred = "#8b0000",
	darksalmon = "#e9967a",
	darkseagreen = "#8fbc8f",
	darkslateblue = "#483d8b",
	darkslategray = "#2f4f4f",
	darkslategrey = "#2f4f4f",
	darkturquoise = "#00ced1",
	darkviolet = "#9400d3",
	deeppink = "#ff1493",
	deepskyblue = "#00bfff",
	dimgray = "#696969",
	dimgrey = "#696969",
	dodgerblue = "#1e90ff",
	firebrick = "#b22222",
	floralwhite = "#fffaf0",
	forestgreen = "#228b22",
	fuchsia = "#ff00ff",
	gainsboro = "#dcdcdc",
	ghostwhite = "#f8f8ff",
	gold = "#ffd700",
	goldenrod = "#daa520",
	gray = "#808080",
	green = "#008000",
	greenyellow = "#adff2f",
	grey = "#808080",
	honeydew = "#f0fff0",
	hotpink = "#ff69b4",
	indianred = "#cd5c5c",
	indigo = "#4b0082",
	ivory = "#fffff0",
	khaki = "#f0e68c",
	lavender = "#e6e6fa",
	lavenderblush = "#fff0f5",
	lawngreen = "#7cfc00",
	lemonchiffon = "#fffacd",
	lightblue = "#add8e6",
	lightcoral = "#f08080",
	lightcyan = "#e0ffff",
	lightgoldenrodyellow = "#fafad2",
	lightgray = "#d3d3d3",
	lightgreen = "#90ee90",
	lightgrey = "#d3d3d3",
	lightpink = "#ffb6c1",
	lightsalmon = "#ffa07a",
	lightseagreen = "#20b2aa",
	lightskyblue = "#87cefa",
	lightslategray = "#778899",
	lightslategrey = "#778899",
	lightsteelblue = "#b0c4de",
	lightyellow = "#ffffe0",
	lime = "#00ff00",
	limegreen = "#32cd32",
	linen = "#faf0e6",
	magenta = "#ff00ff",
	maroon = "#800000",
	mediumaquamarine = "#66cdaa",
	mediumblue = "#0000cd",
	mediumorchid = "#ba55d3",
	mediumpurple = "#9370db",
	mediumseagreen = "#3cb371",
	mediumslateblue = "#7b68ee",
	mediumspringgreen = "#00fa9a",
	mediumturquoise = "#48d1cc",
	mediumvioletred = "#c71585",
	midnightblue = "#191970",
	mintcream = "#f5fffa",
	mistyrose = "#ffe4e1",
	moccasin = "#ffe4b5",
	navajowhite = "#ffdead",
	navy = "#000080",
	oldlace = "#fdf5e6",
	olive = "#808000",
	olivedrab = "#6b8e23",
	orange = "#ffa500",
	orangered = "#ff4500",
	orchid = "#da70d6",
	palegoldenrod = "#eee8aa",
	palegreen = "#98fb98",
	paleturquoise = "#afeeee",
	palevioletred = "#db7093",
	papayawhip = "#ffefd5",
	peachpuff = "#ffdab9",
	peru = "#cd853f",
	pink = "#ffc0cb",
	plum = "#dda0dd",
	powderblue = "#b0e0e6",
	purple = "#800080",
	rebeccapurple = "#663399",
	red = "#ff0000",
	rosybrown = "#bc8f8f",
	royalblue = "#4169e1",
	saddlebrown = "#8b4513",
	salmon = "#fa8072",
	sandybrown = "#f4a460",
	seagreen = "#2e8b57",
	seashell = "#fff5ee",
	sienna = "#a0522d",
	silver = "#c0c0c0",
	skyblue = "#87ceeb",
	slateblue = "#6a5acd",
	slategray = "#708090",
	slategrey = "#708090",
	snow = "#fffafa",
	springgreen = "#00ff7f",
	steelblue = "#4682b4",
	tan = "#d2b48c",
	teal = "#008080",
	thistle = "#d8bfd8",
	tomato = "#ff6347",
	turquoise = "#40e0d0",
	violet = "#ee82ee",
	wheat = "#f5deb3",
	white = "#ffffff",
	whitesmoke = "#f5f5f5",
	yellow = "#ffff00",
	yellowgreen = "#9acd32",

	-- Dye
	dark_green = "darkgreen",
	dark_grey = "darkgrey",
}

-- Converts colorspec into table with keys from 0-255: r g b a
-- Returns nil if invalid or unparseable colorspec.
function b.color.convert(c)
	if type(c) == "table" then
		if c.r and c.g and c.b then
			return c
		end
	elseif type(c) == "number" then
		return {
			a = math.floor((c / (2 ^ 24)) % 0x100),
			r = math.floor((c / (2 ^ 16)) % 0x100),
			g = math.floor((c / (2 ^ 8)) % 0x100),
			b = math.floor(c % 0x100),
		}
	elseif type(c) == "string" then
		if b.color.names[c] then
			return b.color.convert(b.color.names[c])
		end
		local function try_match(match, f)
			if c:match(match) then
				return f(c:match(match))
			end
		end
		local ret
		ret = ret or try_match("(%a+)#(%x+)", function(name, alpha)
			return b.t.combine(b.color.convert(b.color.names[name]), {a = tonumber(alpha, 16)})
		end)
		ret = ret or try_match("#(%x%x)(%x%x)(%x%x)(%x%x)", function(r, g, b, a)
			return {r = tonumber(r, 16), g = tonumber(g, 16), b = tonumber(b, 16), a = tonumber(a, 16)}
		end)
		ret = ret or try_match("#(%x%x)(%x%x)(%x%x)", function(r, g, b)
			return {r = tonumber(r, 16), g = tonumber(g, 16), b = tonumber(b, 16)}
		end)
		ret = ret or try_match("#(%x)(%x)(%x)(%x)", function(r, g, b, a)
			return {r = tonumber(r .. r, 16), g = tonumber(g .. g, 16), b = tonumber(b .. b, 16), a = tonumber(a .. a, 16)}
		end)
		ret = ret or try_match("#(%x)(%x)(%x)", function(r, g, b)
			return {r = tonumber(r .. r, 16), g = tonumber(g .. g, 16), b = tonumber(b .. b, 16)}
		end)
		return ret and ret or nil
	end
end

function b.color.tostring(c)
	local c = b.color.convert(c)
	return c.a and ("#%02x%02x%02x%02x"):format(c.r, c.g, c.b, c.a) or ("#%02x%02x%02x"):format(c.r, c.g, c.b)
end