385
edits
Module:Color contrast: Difference between revisions
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2 revisions imported from wikipedia:Module:Color_contrast: see Topic:Vtixlm0q28eo6jtf
m>Frietjes (simplify, already lowercased) |
m (2 revisions imported from wikipedia:Module:Color_contrast: see Topic:Vtixlm0q28eo6jtf) |
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| Line 63: | Line 63: | ||
return '' | return '' | ||
end | end | ||
-- html '#' entity | |||
c = c:gsub("#", "#") | |||
-- whitespace | -- whitespace | ||
c = c:match( '^%s*(.-)[%s;]*$' ) | c = c:match( '^%s*(.-)[%s;]*$' ) | ||
-- unstrip nowiki strip markers | |||
c = mw.text.unstripNoWiki(c) | |||
-- lowercase | -- lowercase | ||
| Line 76: | Line 83: | ||
-- convert from hsl | -- 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]*%)$') then | if mw.ustring.match(c,'^hsl%([%s]*[0-9][0-9%.]*[%s]*,[%s]*[0-9][0-9%.]*%%[%s]*,[%s]*[0-9][0-9%.]*%%[%s]*%)$') 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 | end | ||
| Line 85: | Line 92: | ||
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]*%)$') then | |||
local R, G, B = mw.ustring.match(c,'^rgb%([%s]*([0-9][0-9%.]*)%%[%s]*,[%s]*([0-9][0-9%.]*)%%[%s]*,[%s]*([0-9][0-9%.]*)%%[%s]*%)$') | |||
return rgbdec2lum(255*tonumber(R)/100, 255*tonumber(G)/100, 255*tonumber(B)/100) | |||
end | end | ||
| Line 112: | Line 125: | ||
function p._greatercontrast(args) | function p._greatercontrast(args) | ||
local bias = tonumber(args['bias'] or '0') or 0 | 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 v1 = color2lum(args[1] or '') | ||
local c2 = args[2] or '#FFFFFF' | local c2 = args[2] or '#FFFFFF' | ||
| Line 117: | Line 131: | ||
local c3 = args[3] or '#000000' | local c3 = args[3] or '#000000' | ||
local v3 = color2lum(c3) | local v3 = color2lum(c3) | ||
local ratio1 = | local ratio1 = -1; | ||
local ratio2 = | local ratio2 = -1; | ||
if (type(v1) == 'number' and type(v2) == 'number') then | if (type(v1) == 'number' and type(v2) == 'number') then | ||
ratio1 = (v2 + 0.05)/(v1 + 0.05) | ratio1 = (v2 + 0.05)/(v1 + 0.05) | ||
| Line 127: | Line 141: | ||
ratio2 = (ratio2 < 1) and 1/ratio2 or ratio2 | ratio2 = (ratio2 < 1) and 1/ratio2 or ratio2 | ||
end | end | ||
return (ratio1 + bias > ratio2) and c2 or c3 | |||
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 | end | ||
| Line 141: | Line 173: | ||
else | else | ||
return args['error'] or '?' | 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 | ||
end | end | ||
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local args = frame.args[1] and frame.args or frame:getParent().args | local args = frame.args[1] and frame.args or frame:getParent().args | ||
return p._ratio(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 | end | ||