मोड्यूल:Color contrast
return { aliceblue = 0.92880068253475, antiquewhite = 0.84646951707754, aqua = 0.7874, aquamarine = 0.8078549208338, azure = 0.97265264954166, beige = 0.8988459998705, bisque = 0.80732327372979, black = 0, blanchedalmond = 0.85084439608156, blue = 0.0722, blueviolet = 0.12622014321946, brown = 0.098224287876511, burlywood = 0.51559844533893, cadetblue = 0.29424681085422, chartreuse = 0.76032025902623, chocolate = 0.23898526114557, coral = 0.37017930872924, cornflowerblue = 0.30318641994179, cornsilk = 0.93562110372965, crimson = 0.16042199953026, cyan = 0.7874, darkblue = 0.018640801980939, darkcyan = 0.20329317839046, darkgoldenrod = 0.27264703559993, darkgray = 0.39675523072563, darkgreen = 0.091143429047575, darkgrey = 0.39675523072563, darkkhaki = 0.45747326349994, darkmagenta = 0.07353047651207, darkolivegreen = 0.12651920884889, darkorange = 0.40016167026524, darkorchid = 0.13413142174857, darkred = 0.054889674531132, darksalmon = 0.40541471563381, darkseagreen = 0.43789249325969, darkslateblue = 0.065792846227988, darkslategray = 0.067608151928044, darkslategrey = 0.067608151928044, darkturquoise = 0.4874606277449, darkviolet = 0.10999048339343, deeppink = 0.23866895828276, deepskyblue = 0.44481603395575, dimgray = 0.14126329114027, dimgrey = 0.14126329114027, dodgerblue = 0.27442536991456, firebrick = 0.10724525535015, floralwhite = 0.95922484825004, forestgreen = 0.18920812076002, fuchsia = 0.2848, gainsboro = 0.71569350050648, ghostwhite = 0.94311261886323, gold = 0.69860877428159, goldenrod = 0.41919977809569, gray = 0.2158605001139, green = 0.15438342968146, greenyellow = 0.80609472611453, grey = 0.2158605001139, honeydew = 0.96336535554782, hotpink = 0.34658438169715, indianred = 0.21406134963884, indigo = 0.03107561486337, ivory = 0.99071270600615, khaki = 0.77012343394121, lavender = 0.80318750514521, lavenderblush = 0.90172748631046, lawngreen = 0.73905893124963, lemonchiffon = 0.94038992245622, lightblue = 0.63709141280807, lightcoral = 0.35522120733135, lightcyan = 0.94587293494829, lightgoldenrodyellow = 0.93348351018297, lightgray = 0.65140563741982, lightgreen = 0.69091979956865, lightgrey = 0.65140563741982, lightpink = 0.58566152734898, lightsalmon = 0.4780675225206, lightseagreen = 0.35050145117042, lightskyblue = 0.56195637618331, lightslategray = 0.23830165007287, lightslategrey = 0.23830165007287, lightsteelblue = 0.53983888284666, lightyellow = 0.98161818392882, lime = 0.7152, limegreen = 0.44571042246098, linen = 0.88357340984379, magenta = 0.2848, maroon = 0.045891942324215, mediumaquamarine = 0.49389703310801, mediumblue = 0.044077780212328, mediumorchid = 0.21639251153773, mediumpurple = 0.22905858091648, mediumseagreen = 0.34393112338131, mediumslateblue = 0.20284629471622, mediumspringgreen = 0.70704308194184, mediumturquoise = 0.5133827926448, mediumvioletred = 0.14371899849357, midnightblue = 0.02071786635086, mintcream = 0.97834604947588, mistyrose = 0.82183047859185, moccasin = 0.80083000991567, navajowhite = 0.76519682342785, navy = 0.015585128108224, oldlace = 0.91900633405549, olive = 0.20027537200568, olivedrab = 0.22593150951929, orange = 0.4817026703631, orangered = 0.25516243753416, orchid = 0.31348806761439, palegoldenrod = 0.78792647887614, palegreen = 0.77936759006353, paleturquoise = 0.76436077921714, palevioletred = 0.28754994117889, papayawhip = 0.87797100199835, peachpuff = 0.74905589878251, peru = 0.30113074877936, pink = 0.63271070702466, plum = 0.45734221587969, powderblue = 0.68254586500605, purple = 0.061477070432439, rebeccapurple = 0.07492341159447, red = 0.2126, rosybrown = 0.32319457649407, royalblue = 0.16663210743188, saddlebrown = 0.097922285020521, salmon = 0.36977241527596, sandybrown = 0.46628543696283, seagreen = 0.19734199706275, seashell = 0.92737862206922, sienna = 0.13697631337098, silver = 0.52711512570581, skyblue = 0.55291668518184, slateblue = 0.14784278062136, slategray = 0.20896704076536, slategrey = 0.20896704076536, snow = 0.96533341834849, springgreen = 0.73052306068529, steelblue = 0.20562642207625, tan = 0.48237604163921, teal = 0.16996855778968, thistle = 0.56818401093733, tomato = 0.30638612719415, turquoise = 0.5895536427578, violet = 0.40315452986676, wheat = 0.74909702820482, white = 1, whitesmoke = 0.91309865179342, yellow = 0.9278, yellowgreen = 0.50762957208707, }
--
-- This module implements
-- {{Color contrast ratio}}
-- {{Greater color contrast ratio}}
-- {{ColorToLum}}
-- {{RGBColorToLum}}
--
local p = {}
local HTMLcolor = mw.loadData( 'Module:Color contrast/colors' )
local function sRGB (v)
if (v <= 0.03928) then
v = v / 12.92
else
v = math.pow((v+0.055)/1.055, 2.4)
end
return v
end
local function rgbdec2lum(R, G, B)
if ( 0 <= R and R < 256 and 0 <= G and G < 256 and 0 <= B and B < 256 ) then
return 0.2126 * sRGB(R/255) + 0.7152 * sRGB(G/255) + 0.0722 * sRGB(B/255)
else
return ''
end
end
local function hsl2lum(h, s, l)
if ( 0 <= h and h < 360 and 0 <= s and s <= 1 and 0 <= l and l <= 1 ) then
local c = (1 - math.abs(2*l - 1))*s
local x = c*(1 - math.abs( math.fmod(h/60, 2) - 1) )
local m = l - c/2
local r, g, b = m, m, m
if( 0 <= h and h < 60 ) then
r = r + c
g = g + x
elseif( 60 <= h and h < 120 ) then
r = r + x
g = g + c
elseif( 120 <= h and h < 180 ) then
g = g + c
b = b + x
elseif( 180 <= h and h < 240 ) then
g = g + x
b = b + c
elseif( 240 <= h and h < 300 ) then
r = r + x
b = b + c
elseif( 300 <= h and h < 360 ) then
r = r + c
b = b + x
end
return rgbdec2lum(255*r, 255*g, 255*b)
else
return ''
end
end
local function color2lum(c)
if (c == nil) then
return ''
end
-- html '#' entity
c = c:gsub("#", "#")
-- whitespace
c = c:match( '^%s*(.-)[%s;]*$' )
-- unstrip nowiki strip markers
c = mw.text.unstripNoWiki(c)
-- lowercase
c = c:lower()
-- first try to look it up
local L = HTMLcolor[c]
if (L ~= nil) then
return L
end
-- convert from hsl
if mw.ustring.match(c,'^hsl%([%s]*[0-9][0-9%.]*[%s]*,[%s]*[0-9][0-9%.]*%%[%s]*,[%s]*[0-9][0-9%.]*%%[%s]*%)$') then
local h, s, l = mw.ustring.match(c,'^hsl%([%s]*([0-9][0-9%.]*)[%s]*,[%s]*([0-9][0-9%.]*)%%[%s]*,[%s]*([0-9][0-9%.]*)%%[%s]*%)$')
return hsl2lum(tonumber(h), tonumber(s)/100, tonumber(l)/100)
end
-- convert from rgb
if mw.ustring.match(c,'^rgb%([%s]*[0-9][0-9]*[%s]*,[%s]*[0-9][0-9]*[%s]*,[%s]*[0-9][0-9]*[%s]*%)$') then
local R, G, B = mw.ustring.match(c,'^rgb%([%s]*([0-9][0-9]*)[%s]*,[%s]*([0-9][0-9]*)[%s]*,[%s]*([0-9][0-9]*)[%s]*%)$')
return rgbdec2lum(tonumber(R), tonumber(G), tonumber(B))
end
-- convert from rgb percent
if mw.ustring.match(c,'^rgb%([%s]*[0-9][0-9%.]*%%[%s]*,[%s]*[0-9][0-9%.]*%%[%s]*,[%s]*[0-9][0-9%.]*%%[%s]*%)$') then
local R, G, B = mw.ustring.match(c,'^rgb%([%s]*([0-9][0-9%.]*)%%[%s]*,[%s]*([0-9][0-9%.]*)%%[%s]*,[%s]*([0-9][0-9%.]*)%%[%s]*%)$')
return rgbdec2lum(255*tonumber(R)/100, 255*tonumber(G)/100, 255*tonumber(B)/100)
end
-- remove leading # (if there is one) and whitespace
c = mw.ustring.match(c, '^[%s#]*([a-f0-9]*)[%s]*$')
-- split into rgb
local cs = mw.text.split(c or '', '')
if( #cs == 6 ) then
local R = 16*tonumber('0x' .. cs[1]) + tonumber('0x' .. cs[2])
local G = 16*tonumber('0x' .. cs[3]) + tonumber('0x' .. cs[4])
local B = 16*tonumber('0x' .. cs[5]) + tonumber('0x' .. cs[6])
return rgbdec2lum(R, G, B)
elseif ( #cs == 3 ) then
local R = 16*tonumber('0x' .. cs[1]) + tonumber('0x' .. cs[1])
local G = 16*tonumber('0x' .. cs[2]) + tonumber('0x' .. cs[2])
local B = 16*tonumber('0x' .. cs[3]) + tonumber('0x' .. cs[3])
return rgbdec2lum(R, G, B)
end
-- failure, return blank
return ''
end
-- This exports the function for use in other modules.
-- The colour is passed as a string.
function p._lum(color)
return color2lum(color)
end
function p._greatercontrast(args)
local bias = tonumber(args['bias'] or '0') or 0
local css = (args['css'] and args['css'] ~= '') and true or false
local v1 = color2lum(args[1] or '')
local c2 = args[2] or '#FFFFFF'
local v2 = color2lum(c2)
local c3 = args[3] or '#000000'
local v3 = color2lum(c3)
local ratio1 = -1;
local ratio2 = -1;
if (type(v1) == 'number' and type(v2) == 'number') then
ratio1 = (v2 + 0.05)/(v1 + 0.05)
ratio1 = (ratio1 < 1) and 1/ratio1 or ratio1
end
if (type(v1) == 'number' and type(v3) == 'number') then
ratio2 = (v3 + 0.05)/(v1 + 0.05)
ratio2 = (ratio2 < 1) and 1/ratio2 or ratio2
end
if css then
local c1 = args[1] or ''
if mw.ustring.match(c1, '^[A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9]$') or
mw.ustring.match(c1, '^[A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9]$') then
c1 = '#' .. c1
end
if mw.ustring.match(c2, '^[A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9]$') or
mw.ustring.match(c2, '^[A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9]$') then
c2 = '#' .. c2
end
if mw.ustring.match(v3, '^[A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9]$') or
mw.ustring.match(v3, '^[A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9]$') then
c3 = '#' .. c3
end
return 'background-color:' .. c1 .. '; color:' .. ((ratio1 > 0) and (ratio2 > 0) and ((ratio1 + bias > ratio2) and c2 or c3) or '') .. ';'
end
return (ratio1 > 0) and (ratio2 > 0) and ((ratio1 + bias > ratio2) and c2 or c3) or ''
end
function p._ratio(args)
local v1 = color2lum(args[1])
local v2 = color2lum(args[2])
if (type(v1) == 'number' and type(v2) == 'number') then
-- v1 should be the brighter of the two.
if v2 > v1 then
v1, v2 = v2, v1
end
return (v1 + 0.05)/(v2 + 0.05)
else
return args['error'] or '?'
end
end
function p._styleratio(args)
local style = (args[1] or ''):lower()
local bg, fg = 'white', 'black'
local lum_bg, lum_fg = 1, 0
if args[2] then
local lum = color2lum(args[2])
if lum ~= '' then bg, lum_bg = args[2], lum end
end
if args[3] then
local lum = color2lum(args[3])
if lum ~= '' then fg, lum_fg = args[3], lum end
end
local slist = mw.text.split(mw.ustring.gsub(mw.ustring.gsub(style or '', '&#[Xx]23;', '#'), '#', '#'), ';')
for k = 1,#slist do
local s = slist[k]
local k,v = s:match( '^[%s]*([^:]-):([^:]-)[%s;]*$' )
k = k or ''
v = v or ''
if (k:match('^[%s]*(background)[%s]*$') or k:match('^[%s]*(background%-color)[%s]*$')) then
local lum = color2lum(v)
if( lum ~= '' ) then bg, lum_bg = v, lum end
elseif (k:match('^[%s]*(color)[%s]*$')) then
local lum = color2lum(v)
if( lum ~= '' ) then bg, lum_fg = v, lum end
end
end
if lum_bg > lum_fg then
return (lum_bg + 0.05)/(lum_fg + 0.05)
else
return (lum_fg + 0.05)/(lum_bg + 0.05)
end
end
--[[
Use {{#invoke:Color contrast|somecolor}} directly or
{{#invoke:Color contrast}} from a wrapper template.
Parameters:
-- |1= — required; A color to check.
--]]
function p.lum(frame)
local color = frame.args[1] or frame:getParent().args[1]
return p._lum(color)
end
function p.ratio(frame)
local args = frame.args[1] and frame.args or frame:getParent().args
return p._ratio(args)
end
function p.styleratio(frame)
local args = frame.args[1] and frame.args or frame:getParent().args
return p._styleratio(args)
end
function p.greatercontrast(frame)
local args = frame.args[1] and frame.args or frame:getParent().args
return p._greatercontrast(args)
end
return p