Module:Change

-- This implements local p = {}

local function ntsh(outvalue) local sortkey = '0000000000000000000' if outvalue == nil then return ' ' 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 ' ' end

local function trim(s) return s:match('^%s*(.-)%s*$') end

local function isnotempty(s) return s and trim(s) ~= '' end

function 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 = ' ' .. s .. '+' .. prec_format(pc, dec) .. '%' .. s .. ' '		elseif pcr < 0 then pcrf = ' ' .. s .. prec_format(pc, dec) .. '%' .. s .. ' '		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 end end

function 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 res end

return p