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Module:Color contrast: Difference between revisions

Module Discussion

Module:Color contrast (edit)

Revision as of 11:41, 21 May 2021

1,477 bytes added ,  2 years ago
m
2 revisions imported from wikipedia:Module:Color_contrast: see Topic:Vtixlm0q28eo6jtf
m>Frietjes
(typos)
m (2 revisions imported from wikipedia:Module:Color_contrast: see Topic:Vtixlm0q28eo6jtf)
 
(22 intermediate revisions by 12 users not shown)
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 118: 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 123: Line 131:
local c3 = args[3] or '#000000'
local c3 = args[3] or '#000000'
local v3 = color2lum(c3)
local v3 = color2lum(c3)
local ratio1 = 0;
local ratio1 = -1;
local ratio2 = 0;
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 133: 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 152: Line 178:
function p._styleratio(args)
function p._styleratio(args)
local style = (args[1] or ''):lower()
local style = (args[1] or ''):lower()
local bg, fg = (args[2] or 'white'), (args[3] or 'black')
local bg, fg = 'white', 'black'
local lum_bg, lum_fg = 1, 0


local slist = mw.text.split(style or '', ';')
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;', '#'), '&#35;', '#'), ';')
for k = 1,#slist do
for k = 1,#slist do
s = slist[k]
local s = slist[k]
local k,v = s:match( '^[%s]*([^:]-):([^:]-)[%s;]*$' )
local k,v = s:match( '^[%s]*([^:]-):([^:]-)[%s;]*$' )
k = k or ''
k = k or ''
v = v or ''
v = v or ''
if (k:match('^[%s]*(background)[%s]*$') or k:match('^[%s]*(background-color)[%s]*$')) then
if (k:match('^[%s]*(background)[%s]*$') or k:match('^[%s]*(background%-color)[%s]*$')) then
bg = v
local lum = color2lum(v)
if( lum ~= '' ) then bg, lum_bg = v, lum end
elseif (k:match('^[%s]*(color)[%s]*$')) then
elseif (k:match('^[%s]*(color)[%s]*$')) then
fg = v
local lum = color2lum(v)
if( lum ~= '' ) then bg, lum_fg = v, lum end
end
end
end
end
 
if lum_bg > lum_fg then
return p._ratio({bg, fg, ['error'] = args['error']})
return (lum_bg + 0.05)/(lum_fg + 0.05)
else
return (lum_fg + 0.05)/(lum_bg + 0.05)
end
end
end


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