Module:Demo

-- Description - Shows a demo of a wikitext -- Syntax : -- Note nowiki tag is necessary! -- local p = {} local getArgs = require("Dev:Arguments").getArgs local frameTools = require("Dev:FrameTools")

--creates a frame object that cannot access any of the parent's args --unless a table containing a list keys of not to inherit is provided function disinherit(frame, onlyTheseKeys) local parent = frame:getParent or frame local tmpFrame = frameTools.makePseudoFrame(parent) local orphan = tmpFrame:newChild{} -- 	local orphan = parent:newChild{}

orphan.getParent = parent.getParent --returns nil orphan.args = {} if onlyTheseKeys then local family = {parent, frame} for f = 1, 2 do			for k, v in pairs(family[f] and family[f].args or {}) do				orphan.args[k] = orphan.args[k] or v			end end parent.args = mw.clone(orphan.args) setmetatable(orphan.args, nil) for _, k in ipairs(onlyTheseKeys) do			rawset(orphan.args, k, nil) end end return orphan, parent end

-- Creates a table and shows the results function formatTable(source,output) local hTable = mw.html.create("table"):css("width","100%") hTable:addClass("wikitable") :tag("tr") :tag("th") :wikitext("Code"):done :tag("th") :wikitext("Output"):done hTable:tag("tr") :tag("td") :wikitext(source):done :tag("td") :wikitext(output):done return hTable end

function p.get(frame, arg, passArgs) local orphan, frame = disinherit(frame, passArgs and {arg or 1}) local code, noWiki, preserve = frame.args[arg or 1] or '' if code:match'nowiki' then local placeholder, preserve = ('6'):char, {} code = mw.text.unstrip (code) noWiki = code:gsub('%%', placeholder):gsub('&lt;', '<'):gsub('&gt;', '>') for k in noWiki:gmatch('&.-;') do			if not preserve[k] then preserve[k] = true table.insert(preserve, (k:gsub('&', '&amp;'))) noWiki = noWiki:gsub('(&.-;)', '%%%s') end end noWiki = mw.text.nowiki(noWiki):format(unpack(preserve)):gsub(placeholder, '%%') end return { source = noWiki or code, output = orphan:preprocess(code):gsub(frame.args.demo_kill_categories and '%[%[Category.-%]%]' or , ), frame = frame } end

function p.main(frame, demoTable) local show = demoTable or p.get(frame) local args = show.frame.args args.br = tonumber(args.br or 1) and (' '):rep(args.br or 1) or args.br or '' if getArgs(frame).table then -- local code = mw.text.unstripNoWiki(show.source) return formatTable(show.source, show.output) elseif show[args.result_arg] then return show[args.result_arg] end return string.format('%s %s%s', args.style and string.format(" style='%s'", args.style) or '', show.source, args.br, show.output) end

--passing of args into other module without preprocessing function p.module(frame) local orphan, frame = disinherit(frame, {		'demo_template',		'demo_module',		'demo_module_func',		'demo_main',		'demo_br',		'demo_result_arg',		'demo_kill_categories'	}) local template = frame.args.demo_template and 'Template:'..frame.args.demo_template local demoFunc = frame.args.demo_module_func or 'main\n' local demoModule = require('Module:' .. frame.args.demo_module)[demoFunc:match('^%s*(.-)%s*$')] frame.args.br, frame.args.result_arg = frame.args.demo_br, frame.args.demo_result_arg if demoModule then local named = {insert = function(self, ...) table.insert(self, ...) return self end} local source = {insert = named.insert, '{{', frame.args.demo_template or frame.args.demo_module, '\n'} if not template then source:insert(2, '#invoke:'):insert(4, '|'):insert(5, demoFunc) end local insertNamed = #source + 1 for k, v in pairs(orphan.args) do			local nan, insert = type(k) ~= 'number', {v} local target = nan and named or source target:insert'|' if nan then target:insert(k):insert'=':insert'\n' table.insert(insert, 1, #target) end target:insert(unpack(insert)) local nowiki = v:match('nowiki') if nowiki or v:match('') then orphan.args[k] = frame:preprocess(nowiki and mw.text.unstripNoWiki(v) or v)			end end source:insert'}}' table.insert(source, insertNamed, table.concat(named)) return p.main(orphan, {			source = mw.text.encode(table.concat(source), "<>'|=~"),			output = tostring(demoModule(orphan)):gsub(frame.args.demo_kill_categories and '%[%[Category.-%]%]' or , ),			frame = frame		}) else return "ERROR: Invalid module function: "..demoFunc end end

return p