Mô đun:Change

-- This implements {{change}}local p = {}local function ntsh(outvalue)	local sortkey = '0000000000000000000'	if outvalue == nil then		return '<span style="display:none" data-sort-value="' .. sortkey .. '♠"></span>'	end		-- This code was copied from [[Template:Convert]]		if outvalue == 0 then		sortkey = '5000000000000000000'	else		local mag = math.floor(math.log10(math.abs(outvalue)) + 1e-14)		local prefix		if outvalue > 0 then			prefix = 7000 + mag		else			prefix = 2999 - mag			outvalue = outvalue + 10^(mag+1)		end		sortkey = string.format('%d', prefix) .. string.format('%015.0f', math.floor(outvalue * 10^(14-mag)))	end	return '<span style="display:none" data-sort-value="' .. sortkey .. '♠"></span>'endlocal function trim(s)	return s:match('^%s*(.-)%s*$')endlocal function isnotempty(s)	return s and trim(s) ~= ''endfunction change(args)	local rnd = require('Module:Math')._round	local prec_format = require('Module:Math')._precision_format	local lang = mw.getContentLanguage()	local function formatnum(num)		return lang:parseFormattedNumber(num) and lang:formatNum(lang:parseFormattedNumber(num)) or num	end		local errorflag = nil		local dsp = args['disp'] or 'row'	local inv = args['invert'] or 'off'	local srt = args['sort'] or ((isnotempty(args['pre']) or isnotempty(args['sort'])) and 'on' or 'off')	local n1 = (inv == 'on') and tonumber(lang:parseFormattedNumber(args['2'])) or tonumber(lang:parseFormattedNumber(args['1']))	local n2 = (inv == 'on') and tonumber(lang:parseFormattedNumber(args['1'])) or tonumber(lang:parseFormattedNumber(args['2']))	local dec = args['dec'] or '2'	local s = ((args['italics'] or 'off') == 'on' and "''" or "")			.. ((args['bold'] or 'off') == 'on' and "'''" or "")		local pc, pcr, pcrf = 'NA', 'NA'		if n1 and n2 and n1 ~= 0 then		pc = 100*(n2/n1 - 1)		pcr = rnd(pc, dec)		if pcr > 0 then			pcrf = '<span style="color:green">' ..				s .. '+' .. prec_format(pc, dec) .. '%' .. s .. '</span>'		elseif pcr < 0 then			pcrf = '<span style="color:red">' ..				s .. prec_format(pc, dec) .. '%' .. s .. '</span>'		else			pcrf = s .. prec_format(0, dec) .. '%' .. s		end		pcrf = ntsh(pcr) .. pcrf	else		pcrf = ntsh(nil) .. s .. 'NA' .. s		if n1 == nil or n2 == nil then			errorflag = 1		end	end		if dsp == 'out' then		return pcrf, errorflag	else		local pre1 = args['pre1'] or args['pre'] or ''		local pre2 = args['pre2'] or args['pre'] or ''		local suf1 = args['suf1'] or args['suf'] or ''		local suf2 = args['suf2'] or args['suf'] or ''		local rspn = 'rowspan=' .. (args['rowspan'] or '1') .. ' '		local algn = 'text-align:' .. (args['align'] or 'right') .. ';'		local bg = 'background-color:' .. (args['bgcolour'] or args['bgcolor'] or 'inherit') .. ';'		if rspn == 'rowspan=1 ' then rspn = '' end		if bg == 'background-color:inherit;' then bg = '' end		local style = rspn .. 'style="' .. algn .. bg .. '"'				local sk1, sk2 = '', ''				if srt == 'on' then			sk1 = ntsh(n1)			sk2 = ntsh(n2)		end				if n1 ~= nil then			if n1 < 0 then				n1 = '−' .. formatnum(-1*n1)			else				n1 = formatnum(n1)			end		else			n1 = (inv == 'on') and (args['2'] or '') or (args['1'] or '')		end				if n2 ~= nil then			if n2 < 0 then				n2 = '−' .. formatnum(-1*n2)			else				n2 = formatnum(n2)			end		else			n2 = (inv == 'on') and (args['1'] or '') or (args['2'] or '')		end				if dsp == 'row2' then			return style .. '|' .. s .. pre2 .. n2 .. suf2 .. s				.. '\n|' .. style .. '|' .. pcrf, errorflag		elseif inv == 'off' then			return style .. '|' .. s .. pre1 .. n1 .. suf1 .. s				.. '\n|' .. style .. '|' .. s .. pre2 .. n2 .. suf2 .. s				.. '\n|' .. style .. '|' .. pcrf, errorflag		else			return style .. '|' .. s .. pre1 .. n2 .. suf1 .. s				.. '\n|' .. style .. '|' .. s .. pre2 .. n1 .. suf2 .. s				.. '\n|' .. style .. '|' .. pcrf, errorflag		end	endendfunction p.main(frame)	local res, eflag = change((frame.args[1] or frame.args[2]) and frame.args or frame:getParent().args)	if eflag then		res = res .. frame:expandTemplate{title = 'change/error'}	end	return resendreturn p