Module:Color contrast: Difference between revisions

Module:Color contrast (edit)

224 bytes added , 9 years ago

better error checking

Anonymous user

@@ Line 153: / Line 153: @@
 	local style = (args[1] or ''):lower()
 	local bg, fg = (args[2] or 'white'), (args[3] or 'black')
+	local lum_bg, lum_fg = 1, 0
 	local slist = mw.text.split(style or '', ';')
@@ Line 161: / Line 162: @@
 		v = v or ''
 		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
-			fg = v
+			local lum = color2lum(v)
+			if( lum ~= '' ) then bg, lum_fg = v, lum 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