mail/util/colors.lua
2024-03-22 22:43:26 +01:00

59 lines
1.4 KiB
Lua

local generic_colors = {
header = "#999999",
selected = "#72FF63",
important = "#FFD700",
additional = "#CCCCDD",
highlighted = "#608631",
new = "#00F529",
warning = "#FF8800",
disabled = "#332222",
muted = "#CCCCCC",
}
local function get_base_color(c)
return generic_colors[c] or ""
end
local function hex2rgb(hex)
hex = hex:gsub("#","")
return {
r = tonumber("0x" .. hex:sub(1,2)),
g = tonumber("0x" .. hex:sub(3,4)),
b = tonumber("0x" .. hex:sub(5,6))
}
end
local function rgb2hex(rgb)
return "#" .. string.format("%x", rgb.r) .. string.format("%x", rgb.g) .. string.format("%x", rgb.b)
end
local function rgb_colors_mix(colors)
local R = 0
local G = 0
local B = 0
for _, c in ipairs(colors) do
R = R + c.r
G = G + c.g
B = B + c.b
end
R = math.floor(R / #colors + 0.5)
G = math.floor(G / #colors + 0.5)
B = math.floor(B / #colors + 0.5)
return {r=R,g=G,b=B}
end
function mail.get_color(mix)
if type(mix) == "string" then
return get_base_color(mix)
elseif #mix == 1 then
return get_base_color(mix[1])
else
local colors2mix = {}
for _, c in ipairs(mix) do
colors2mix[#colors2mix+1] = hex2rgb(get_base_color(c))
end
local mixed_color = rgb_colors_mix(colors2mix)
return rgb2hex(mixed_color)
end
end