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Module:Color contrast: Difference between revisions

add support for hsl
m>Mr. Stradivarius
m (Protected Module:Color contrast: High-risk Lua module ([Edit=Allow only autoconfirmed users] (indefinite) [Move=Allow only autoconfirmed users] (indefinite)))
m>Frietjes
(add support for hsl)
Line 16: Line 16:
end
end
return v
return v
end
local function hsl2lum( h, s, l )
local lum = ''
if ( 0 <= h and h < 360 and 0 <= s and s <= 1 and 0 <= l and l <= 1 ) then
local c = (1 - abs(2*l - 1))*s
local x = c*(1 - abs( mod(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 = R + c
B = G + x
elseif( 180 <= h and h < 240 ) then
G = R + x
B = G + c
elseif( 240 <= h and h < 300 ) then
R = R + x
B = G + c
elseif( 300 <= h and h < 360 ) then
R = R + c
B = G + x
end
lum = 0.2126 * sRGB(R) + 0.7152 * sRGB(G) + 0.0722 * sRGB(B)
end
return lum
end
end


Line 35: Line 67:
end
end
-- remove leading # (if there is one) and whitespace
-- remove leading # (if there is one) and whitespace
c = mw.ustring.match(c, '^[%s#]*([a-f0-9]*)[%s]*$')
c = mw.ustring.match(c, '^[%s#]*([a-f0-9]*)[%s;]*$')
 
  -- 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]*%)$') then
local h = mw.ustring.match(c,'^hsl%[%s]*([0-9][0-9]*)[%s]*,[%s]*[0-9][0-9]*%%[%s]*,[%s]*[0-9][0-9]*%%[%s]*%$')
local s = mw.ustring.match(c,'^hsl%[%s]*[0-9][0-9]*[%s]*,[%s]*([0-9][0-9]*)%%[%s]*,[%s]*[0-9][0-9]*%%[%s]*%$')
local l = mw.ustring.match(c,'^hsl%[%s]*[0-9][0-9]*[%s]*,[%s]*[0-9][0-9]*%%[%s]*,[%s]*([0-9][0-9]*)%%[%s]*%$')
return hsl2rgb(tonumber(h), tonumber(s)/100, tonumber(l)/100)
  end


-- split into rgb
-- split into rgb
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