Module:Color contrast: Difference between revisions
fix unintended color2lum global error which is causing errors; clean whitespace
(synced changes from sandbox - created an access point to lum available to other modules) |
(fix unintended color2lum global error which is causing errors; clean whitespace) |
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-- | -- | ||
-- This module implements | -- This module implements | ||
-- {{Color contrast ratio}} | -- {{Color contrast ratio}} | ||
-- {{Greater color contrast ratio}} | -- {{Greater color contrast ratio}} | ||
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local HTMLcolor = mw.loadData( 'Module:Color contrast/colors' ) | local HTMLcolor = mw.loadData( 'Module:Color contrast/colors' ) | ||
local function sRGB (v) | local function sRGB (v) | ||
if (v <= 0.03928) then | if (v <= 0.03928) then | ||
v = v / 12.92 | v = v / 12.92 | ||
else | else | ||
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return '' | return '' | ||
end | end | ||
end | end | ||
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end | 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]*%)$') then | |||
local h, s, l = mw.ustring.match(c,'^hsl%([%s]*([0-9][0-9%.]*)[%s]*,[%s]*([0-9][0-9%.]*)%%[%s]*,[%s]*([0-9][0-9%.]*)%%[%s]*%)$') | 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]*%)$') | ||
return hsl2lum(tonumber(h), tonumber(s)/100, tonumber(l)/100) | return hsl2lum(tonumber(h), tonumber(s)/100, tonumber(l)/100) | ||
end | |||
-- convert from rgb | |||
if mw.ustring.match(c,'^rgb%([%s]*[0-9][0-9]*[%s]*,[%s]*[0-9][0-9]*[%s]*,[%s]*[0-9][0-9]*[%s]*%)$') 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]*%)$') | local R, G, B = mw.ustring.match(c,'^rgb%([%s]*([0-9][0-9]*)[%s]*,[%s]*([0-9][0-9]*)[%s]*,[%s]*([0-9][0-9]*)[%s]*%)$') | ||
return rgbdec2lum(tonumber(R), tonumber(G), tonumber(B)) | 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]*%)$') then | |||
local R, G, B = mw.ustring.match(c,'^rgb%([%s]*([0-9][0-9%.]*)%%[%s]*,[%s]*([0-9][0-9%.]*)%%[%s]*,[%s]*([0-9][0-9%.]*)%%[%s]*%)$') | 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) | return rgbdec2lum(255*tonumber(R)/100, 255*tonumber(G)/100, 255*tonumber(B)/100) | ||
end | |||
-- remove leading # (if there is one) and whitespace | -- remove leading # (if there is one) and whitespace | ||
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-- failure, return blank | -- failure, return blank | ||
return '' | 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 | end | ||
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ratio2 = (ratio2 < 1) and 1/ratio2 or ratio2 | ratio2 = (ratio2 < 1) and 1/ratio2 or ratio2 | ||
end | end | ||
if css then | if css then | ||
local c1 = args[1] or '' | local c1 = args[1] or '' | ||
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return 'background-color:' .. c1 .. '; color:' .. ((ratio1 > 0) and (ratio2 > 0) and ((ratio1 + bias > ratio2) and c2 or c3) or '') .. ';' | return 'background-color:' .. c1 .. '; color:' .. ((ratio1 > 0) and (ratio2 > 0) and ((ratio1 + bias > ratio2) and c2 or c3) or '') .. ';' | ||
end | end | ||
return (ratio1 > 0) and (ratio2 > 0) and ((ratio1 + bias > ratio2) and c2 or c3) or '' | return (ratio1 > 0) and (ratio2 > 0) and ((ratio1 + bias > ratio2) and c2 or c3) or '' | ||
end | end | ||
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--[[ | --[[ | ||
Use {{#invoke:Color contrast|somecolor}} directly or | Use {{#invoke:Color contrast|somecolor}} directly or | ||
{{#invoke:Color contrast}} from a wrapper template. | {{#invoke:Color contrast}} from a wrapper template. | ||