Module:Su

-- This module implements.

local p = {}

function p.main(frame) -- Use arguments from the parent frame only, and remove any blank arguments. -- We don't need to trim whitespace from any arguments, as this module only -- uses named arguments, and whitespace is trimmed from them automatically. local origArgs = frame:getParent.args local args = {} for k, v in pairs(origArgs) do		if v ~= '' then args[k] = v		end end

-- Define the variables to pass to luaMain. local sup = args.p	local sub = args.b	local options = { align = args.a,		fontSize = args.w,		lineHeight = args.lh, verticalAlign = args.va	} return p._main(sup, sub, options) end

function p.invoke_main(frame) -- entry point for invocation using frame arguments local origArgs = frame.args local args = {} for k, v in pairs(origArgs) do		if v ~= '' then args[k] = v		end end

-- Define the variables to pass to luaMain. local sup = args.p	local sub = args.b	local options = { align = args.a,		fontSize = args.w,		lineHeight = args.lh, verticalAlign = args.va	} return p._main(sup, sub, options) end

function p._main(sup, sub, options) options = options or {} local span = mw.html.create('span')

-- Set the styles. span:css{ ['display']       = 'inline-block', ['margin-bottom'] = '-0.3em', ['vertical-align'] = options.verticalAlign or sub and '-0.4em' or '0.8em', ['line-height']   = options.lineHeight or '1.2em' }	if options.fontSize == 'f' or options.fontSize == 'fixed' then span:css{ ['font-family'] = 'monospace', ['font-size']  = '80%' }	else span:css('font-size', options.fontSize or '80%') end if options.align == 'r' or options.align == 'right' then span:css('text-align', 'right') elseif options.align == 'c' or options.align == 'center' then span:css('text-align', 'center') else span:css('text-align', 'left') end

-- Add the wikitext. span :tag('sup') :css('font-size', 'inherit') :css('line-height', 'inherit') :css('vertical-align', 'baseline') :wikitext(sup) :done :tag('br', {selfClosing = true}):done :tag('sub') :css('font-size', 'inherit') :css('line-height', 'inherit') :css('vertical-align', 'baseline') :wikitext(sub) return tostring(span) end

return p