Module:Documentation

-- This module implements.

-- Get required modules. local getArgs = require('Module:Arguments').getArgs local htmlBuilder = require('Module:HtmlBuilder') local messageBox = require('Module:Message box')

-- Get the config table. local cfg = mw.loadData('Module:Documentation/config')

local p = {}

-- Often-used functions. local ugsub = mw.ustring.gsub

-- Helper functions -- -- These are defined as local functions, but are made available in the p -- table for testing purposes.

local function message(cfgKey, valArray, expectType) --	-- Gets a message from the cfg table and formats it if appropriate.	-- The function raises an error if the value from the cfg table is not	-- of the type expectType. The default type for expectType is 'string'.	-- If the table valArray is present, strings such as $1, $2 etc. in the	-- message are substituted with values from the table keys [1], [2] etc.	-- For example, if the message cfg.fooMessage had the value 'Foo $2 bar $1.',	-- message('foo-message', {'baz', 'qux'}) would return "Foo qux bar baz."	-- local msg = cfg[cfgKey] expectType = expectType or 'string' if type(msg) ~= expectType then error('message: type error in message cfg.' .. cfgKey .. ' (' .. expectType .. ' expected, got ' .. type(msg) .. ')', 2)	end if not valArray then return msg end

local function getMessageVal(match) match = tonumber(match) return valArray[match] or error('message: no value found for key $' .. match .. ' in message cfg.' .. cfgKey, 4) end

local ret = ugsub(msg, '$([1-9][0-9]*)', getMessageVal) return ret end

p.message = message

local function makeWikilink(page, display) if display then return mw.ustring.format('%s', page, display) else return mw.ustring.format('%s', page) end end

p.makeWikilink = makeWikilink

local function makeCategoryLink(cat, sort) local catns = mw.site.namespaces[14].name return makeWikilink(catns .. ':' .. cat, sort) end

p.makeCategoryLink = makeCategoryLink

local function makeUrlLink(url, display) return mw.ustring.format('[%s %s]', url, display) end

p.makeUrlLink = makeUrlLink

local function makeToolbar(...) local ret = {} local lim = select('#', ...) if lim < 1 then return nil end for i = 1, lim do		ret[#ret + 1] = select(i, ...) end return '(' .. table.concat(ret, ' &#124; ') .. ') ' end

p.makeToolbar = makeToolbar

-- Argument processing

local function makeInvokeFunc(funcName) return function (frame) local args = getArgs(frame, {			valueFunc = function (key, value)				if type(value) == 'string' then					value = value:match('^%s*(.-)%s*$') -- Remove whitespace.					if key == 'heading' or value ~= '' then						return value					else						return nil					end				else					return value				end			end		}) return p[funcName](args) end end

-- Main function

p.main = makeInvokeFunc('_main')

function p._main(args) --	-- This function defines logic flow for the module.	-- @args - table of arguments passed by the user	-- 	-- Messages:	-- 'main-div-id' --> 'template-documentation'	-- 'main-div-classes' --> 'template-documentation iezoomfix'	-- local env = p.getEnvironment(args) local root = htmlBuilder.create root .wikitext(p.protectionTemplate(env)) .wikitext(p.sandboxNotice(args, env)) -- This div tag is from, but moving it here -- so that we don't have to worry about unclosed tags. .tag('div') .attr('id', message('main-div-id')) .addClass(message('main-div-classes')) .newline .wikitext(p._startBox(args, env)) .wikitext(p._content(args, env)) .tag('div') .css('clear', 'both') -- So right or left floating items don't stick out of the doc box. .newline .done .done .wikitext(p._endBox(args, env)) .newline .wikitext(p.addTrackingCategories(env)) return tostring(root) end

-- Environment settings

function p.getEnvironment(args) --	-- Returns a table with information about the environment, including title objects and other namespace- or	-- path-related data.	-- @args - table of arguments passed by the user	--	-- Title objects include:	-- env.title - the page we are making documentation for (usually the current title)	-- env.templateTitle - the template (or module, file, etc.)	-- env.docTitle - the /doc subpage.	-- env.sandboxTitle - the /sandbox subpage.	-- env.testcasesTitle - the /testcases subpage.	-- env.printTitle - the print version of the template, located at the /Print subpage.	--	-- Data includes:	-- env.subjectSpace - the number of the title's subject namespace.	-- env.docSpace - the number of the namespace the title puts its documentation in.	-- env.docpageRoot - the text of the base page of the /doc, /sandbox and /testcases pages, with namespace.	-- env.compareUrl - URL of the Special:ComparePages page comparing the sandbox with the template.	-- 	-- All table lookups are passed through pcall so that errors are caught. If an error occurs, the value	-- returned will be nil.	-- local env, envFuncs = {}, {}

-- Set up the metatable. If triggered we call the corresponding function in the envFuncs table. The value -- returned by that function is memoized in the env table so that we don't call any of the functions -- more than once. (Nils won't be memoized.) setmetatable(env, {		__index = function (t, key)			local envFunc = envFuncs[key]			if envFunc then				local success, val = pcall(envFunc)				if success then					env[key] = val -- Memoise the value.					return val				end			end			return nil		end	})

function envFuncs.title -- The title object for the current page, or a test page passed with args.page. local title local titleArg = args.page if titleArg then title = mw.title.new(titleArg) else title = mw.title.getCurrentTitle end return title end

function envFuncs.templateTitle --		-- The template (or module, etc.) title object.		-- Messages:		-- 'sandbox-subpage' --> 'sandbox'		-- 'testcases-subpage' --> 'testcases'		-- local title = env.title local subpage = title.subpageText if subpage == message('sandbox-subpage') or subpage == message('testcases-subpage') then return title.basePageTitle else return title end end

function envFuncs.docTitle --		-- Title object of the /doc subpage.		-- Messages:		-- 'doc-subpage' --> 'doc'		-- local title = env.title local docname = args[1] -- User-specified doc page. local docpage if docname then docpage = docname else docpage = env.docpageRoot .. '/' .. message('doc-subpage') end return mw.title.new(docpage) end function envFuncs.sandboxTitle --		-- Title object for the /sandbox subpage.		-- Messages:		-- 'sandbox-subpage' --> 'sandbox'		-- return mw.title.new(env.docpageRoot .. '/' .. message('sandbox-subpage')) end function envFuncs.testcasesTitle --		-- Title object for the /testcases subpage.		-- Messages:		-- 'testcases-subpage' --> 'testcases'		-- return mw.title.new(env.docpageRoot .. '/' .. message('testcases-subpage')) end function envFuncs.printTitle --		-- Title object for the /Print subpage.		-- Messages:		-- 'print-subpage' --> 'Print'		-- return env.templateTitle:subPageTitle(message('print-subpage')) end

function envFuncs.subjectSpace -- The subject namespace number. return mw.site.namespaces[env.title.namespace].subject.id	end

function envFuncs.docSpace -- The documentation namespace number. For most namespaces this is the same as the -- subject namespace. However, pages in the Article, File, MediaWiki or Category -- namespaces must have their /doc, /sandbox and /testcases pages in talk space. local subjectSpace = env.subjectSpace if subjectSpace == 0 or subjectSpace == 6 or subjectSpace == 8 or subjectSpace == 14 then return subjectSpace + 1 else return subjectSpace end end

function envFuncs.docpageRoot -- The base page of the /doc, /sandbox, and /testcases subpages. -- For some namespaces this is the talk page, rather than the template page. local templateTitle = env.templateTitle local docSpace = env.docSpace local docSpaceText = mw.site.namespaces[docSpace].name -- Assemble the link. docSpace is never the main namespace, so we can hardcode the colon. return docSpaceText .. ':' .. templateTitle.text end function envFuncs.compareUrl -- Diff link between the sandbox and the main template using Special:ComparePages. local templateTitle = env.templateTitle local sandboxTitle = env.sandboxTitle local compareUrl = mw.uri.fullUrl(			'Special:ComparePages',			{page1 = templateTitle.prefixedText, page2 = sandboxTitle.prefixedText}		) return tostring(compareUrl) end

return env end

-- Auxiliary templates

function p.sandboxNotice(args, env) --	local title = env.title local sandboxTitle = env.sandboxTitle local templateTitle = env.templateTitle if not (title and sandboxTitle and templateTitle and mw.title.equals(title, sandboxTitle)) then return nil end -- Build the table of arguments to pass to. We need just two fields, "image" and "text". local omargs = {} omargs.image = message('sandbox-notice-image') -- Get the text. We start with the opening blurb, which is something like -- "This is the template sandbox for Template:Foo (diff)." local text = '' local frame = mw.getCurrentFrame local isPreviewing = frame:preprocess() ==  -- True if the page is being previewed. local templateLink = makeWikilink(templateTitle.prefixedText) local compareUrl = env.compareUrl if isPreviewing or not compareUrl then text = text .. message('sandbox-notice-blurb', {templateLink}) else local compareDisplay = message('sandbox-notice-compare-link-display') local compareLink = makeUrlLink(compareUrl, compareDisplay) text = text .. message('sandbox-notice-diff-blurb', {templateLink, compareLink}) end -- Get the test cases page blurb if the page exists. This is something like -- "See also the companion subpage for test cases." local testcasesTitle = env.testcasesTitle if testcasesTitle and testcasesTitle.exists then local testcasesLinkDisplay = message('sandbox-notice-testcases-link-display') local testcasesLink = makeWikilink(testcasesTitle.prefixedText, testcasesLinkDisplay) text = text .. ' ' .. message('sandbox-notice-testcases-blurb', {testcasesLink}) end -- Add the sandbox to the sandbox category. text = text .. makeCategoryLink(message('sandbox-category')) omargs.text = text return messageBox.main('ombox', omargs) end

function p.protectionTemplate(env) -- Generates the padlock icon in the top right. -- @env - environment table containing title objects, etc., generated with p.getEnvironment -- Messages: -- 'protection-template' --> 'pp-template' -- 'protection-template-args' --> {docusage = 'yes'} local title = env.title local protectionTemplate = message('protection-template') if not (protectionTemplate and title.namespace == 10) then -- Don't display the protection template if we are not in the template namespace. return nil end local frame = mw.getCurrentFrame local function getProtectionLevel(protectionType, page) -- Gets the protection level for page, or for the current page if page is not specified. local level = frame:callParserFunction('PROTECTIONLEVEL', protectionType, page) if level ~= '' then return level else return nil -- The parser function returns the blank string if there is no match. end end local prefixedTitle = title.prefixedText if getProtectionLevel('move', prefixedTitle) == 'sysop' or getProtectionLevel('edit', prefixedTitle) then -- The page is full-move protected, or full, template, or semi-protected. return frame:expandTemplate{title = protectionTemplate, args = message('protection-template-args', nil, 'table')} end return nil end

-- Start box

p.startBox = makeInvokeFunc('_startBox')

function p._startBox(args, env) --	-- This function generates the start box.	-- @args - a table of arguments passed by the user	-- @env - environment table containing title objects, etc., generated with p.getEnvironment	-- 	-- The actual work is done by p.makeStartBoxLinksData and p.renderStartBoxLinks which make	-- the [view] [edit] [history] [purge] links, and by p.makeStartBoxData and p.renderStartBox	-- which generate the box HTML.	-- local links local content = args.content if not content then -- No need to include the links if the documentation is on the template page itself. local linksData = p.makeStartBoxLinksData(args, env) if linksData then links = p.renderStartBoxLinks(linksData) end end -- Generate the start box html. local data = p.makeStartBoxData(args, env, links) if data then return p.renderStartBox(data) else -- User specified no heading. return nil end end

function p.makeStartBoxLinksData(args, env) --	-- Does initial processing of data to make the [view] [edit] [history] [purge] links.	-- @args - a table of arguments passed by the user	-- @env - environment table containing title objects, etc., generated with p.getEnvironment	-- 	-- Messages:	-- 'view-link-display' --> 'view'	-- 'edit-link-display' --> 'edit'	-- 'history-link-display' --> 'history'	-- 'purge-link-display' --> 'purge'	-- 'file-docpage-preload' --> 'Template:Documentation/preload-filespace'	-- 'docpage-preload' --> 'Template:Documentation/preload'	-- 'create-link-display' --> 'create'	-- local data = {} -- Get title objects. local title = env.title local docTitle = env.docTitle if not title or not docTitle then return nil end data.title = title data.docTitle = docTitle -- View, display, edit, and purge links if /doc exists. data.viewLinkDisplay = message('view-link-display') data.editLinkDisplay = message('edit-link-display') data.historyLinkDisplay = message('history-link-display') data.purgeLinkDisplay = message('purge-link-display') -- Create link if /doc doesn't exist. local preload = args.preload if not preload then if env.subjectSpace == 6 then -- File namespace preload = message('file-docpage-preload') else preload = message('docpage-preload') end end data.preload = preload data.createLinkDisplay = message('create-link-display') return data end

function p.renderStartBoxLinks(data) --	-- Generates the [view][edit][history][purge] or [create] links from the data table.	-- @data - a table of data generated by p.makeStartBoxLinksData	-- local ret local docTitle = data.docTitle local title = data.title if docTitle.exists then local viewLink = makeWikilink(docTitle.prefixedText, data.viewLinkDisplay) local editLink = makeUrlLink(docTitle:fullUrl{action = 'edit'}, data.editLinkDisplay) local historyLink = makeUrlLink(docTitle:fullUrl{action = 'history'}, data.historyLinkDisplay) local purgeLink = makeUrlLink(title:fullUrl{action = 'purge'}, data.purgeLinkDisplay) ret = '[%s] [%s] [%s] [%s]' ret = ret:gsub('%[', '&#91;') -- Replace square brackets with HTML entities. ret = ret:gsub('%]', '&#93;') ret = mw.ustring.format(ret, viewLink, editLink, historyLink, purgeLink) else ret = makeUrlLink(docTitle:fullUrl{action = 'edit', preload = data.preload}, data.createLinkDisplay) end end

function p.makeStartBoxData(args, env, links) --	local subjectSpace = env.subjectSpace if not subjectSpace then -- Default to an "other namespaces" namespace, so that we get at least some output -- if an error occurs. subjectSpace = 2 end local data = {} -- Heading local heading = args.heading -- Blank values are not removed. if heading == '' then -- Don't display the start box if the heading arg is defined but blank. return nil end if heading then data.heading = heading elseif subjectSpace == 10 then -- Template namespace data.heading = message('documentation-icon-wikitext') .. ' ' .. message('template-namespace-heading') elseif subjectSpace == 828 then -- Module namespace data.heading = message('documentation-icon-wikitext') .. ' ' .. message('module-namespace-heading') elseif subjectSpace == 6 then -- File namespace data.heading = message('file-namespace-heading') else data.heading = message('other-namespaces-heading') end -- Heading CSS local headingStyle = args['heading-style'] if headingStyle then data.headingStyleText = headingStyle elseif subjectSpace == 10 then -- We are in the template or template talk namespaces. data.headingFontWeight = 'bold' data.headingFontSize = '125%' else data.headingFontSize = '150%' end -- Data for the [view][edit][history][purge] or [create] links. if links then data.linksClass = message('start-box-linkclasses') data.linksId = message('start-box-link-id') data.links = links end return data end

function p.renderStartBox(data) -- Renders the start box html. -- @data - a table of data generated by p.makeStartBoxData. local sbox = htmlBuilder.create('div') sbox .css('padding-bottom', '3px') .css('border-bottom', '1px solid #aaa') .css('margin-bottom', '1ex') .newline .tag('span') .cssText(data.headingStyleText) .css('font-weight', data.headingFontWeight) .css('font-size', data.headingFontSize) .wikitext(data.heading) local links = data.links if links then sbox.tag('span') .addClass(data.linksClass) .attr('id', data.linksId) .wikitext(links) end return tostring(sbox) end

-- Documentation content

p.content = makeInvokeFunc('_content')

function p._content(args, env) -- Displays the documentation contents -- @args - a table of arguments passed by the user -- @env - environment table containing title objects, etc., generated with p.getEnvironment local docTitle = env.docTitle local content = args.content if not content and docTitle and docTitle.exists then local frame = mw.getCurrentFrame content = frame:preprocess('') end -- The line breaks below are necessary so that "=== Headings ===" at the start and end -- of docs are interpreted correctly. return '\n' .. (content or '') .. '\n' end

-- End box

p.endBox = makeInvokeFunc('_endBox')

function p._endBox(args, env) --[=[	-- This function generates the end box (also known as the link box). -- @args - a table of arguments passed by the user -- @env - environment table containing title objects, etc., generated with p.getEnvironment -- 	-- Messages: -- 'fmbox-id' --> 'documentation-meta-data' -- 'fmbox-style' --> 'background-color: #ecfcf4' -- 'fmbox-textstyle' --> 'font-style: italic' -- 	-- The HTML is generated by the template, courtesy of Module:Message box. --]=]	-- Get environment data. local subjectSpace = env.subjectSpace local docTitle = env.docTitle if not subjectSpace or not docTitle then return nil end -- Check whether we should output the end box at all. Add the end -- box by default if the documentation exists or if we are in the -- user, module or template namespaces. local linkBox = args['link box'] if linkBox == 'off' or not (			docTitle.exists			or subjectSpace == 2			or subjectSpace == 828			or subjectSpace == 10		) then return nil end

-- Assemble the arguments for. local fmargs = {} fmargs.id = message('fmbox-id') -- Sets 'documentation-meta-data' fmargs.image = 'none' fmargs.style = message('fmbox-style') -- Sets 'background-color: #ecfcf4' fmargs.textstyle = message('fmbox-textstyle') -- 'font-style: italic;'

-- Assemble the fmbox text field. local text = '' if linkBox then -- Use custom link box content if it is defined. text = text .. linkBox else text = text .. (p.makeDocPageBlurb(args, env) or '') -- Add links to /sandbox and /testcases when appropriate. if subjectSpace == 2 or subjectSpace == 828 or subjectSpace == 10 then -- We are in the user, module or template namespaces. text = text .. p.makeEndBoxExperimentBlurb(args, env) text = text .. ' '			-- Show the categories text, but not if we have the content on the template page itself, -- or if the documentation page has been specified explicitly, since then it is unclear -- where to add the categories. if not args.content and not args[1] then text = text .. (p.makeCategoriesBlurb(args, env) or '') end -- Show the "subpages" link if we are not in the File namespace. if subjectSpace ~= 6 then text = text .. ' ' .. (p.makeSubpagesBlurb(args, env) or '') end -- Show the "print" link if it exists. local printBlurb = p.makePrintBlurb(args, env) if printBlurb then text = text .. ' ' .. printBlurb end end end fmargs.text = text

return messageBox.main('fmbox', fmargs) end

function p.makeDocPageBlurb(args, env) -- Get the title object. local docTitle = env.docTitle if not docTitle then return nil end -- Make the blurb. local ret if docTitle.exists then -- /doc exists; link to it. local docLink = makeWikilink(docTitle.prefixedText) local editUrl = docTitle:fullUrl{action = 'edit'} local editDisplay = message('edit-link-display') local editLink = makeUrlLink(editUrl, editDisplay) local historyUrl = docTitle:fullUrl{action = 'history'} local historyDisplay = message('history-link-display') local historyLink = makeUrlLink(historyUrl, historyDisplay) ret = message('transcluded-from-blurb', {docLink}) .. ' '			.. makeToolbar(editLink, historyLink) .. ' '	elseif env.subjectSpace == 828 then -- /doc does not exist; ask to create it. local createUrl = docTitle:fullUrl{action = 'edit', preload = message('module-preload')} local createDisplay = message('create-link-display') local createLink = makeUrlLink(createUrl, createDisplay) ret = message('create-module-doc-blurb', {createLink}) .. ' '	end return ret end

function p.makeEndBoxExperimentBlurb(args, env) -- Renders the text "Editors can experiment in this template's sandbox (edit | diff) and testcases (edit) pages." -- Get environment data. local subjectSpace = env.subjectSpace local templateTitle = env.templateTitle local sandboxTitle = env.sandboxTitle local testcasesTitle = env.testcasesTitle local templatePage = templateTitle.prefixedText if not subjectSpace or not templateTitle or not sandboxTitle or not testcasesTitle then return nil end -- Make links. local sandboxLinks, testcasesLinks if sandboxTitle.exists then local sandboxPage = sandboxTitle.prefixedText local sandboxDisplay = message('sandbox-link-display') local sandboxLink = makeWikilink(sandboxPage, sandboxDisplay) local sandboxEditUrl = sandboxTitle:fullUrl{action = 'edit'} local sandboxEditDisplay = message('sandbox-edit-link-display') local sandboxEditLink = makeUrlLink(sandboxEditUrl, sandboxEditDisplay) local compareUrl = env.compareUrl local compareLink if compareUrl then local compareDisplay = message('compare-link-display') compareLink = makeUrlLink(compareUrl, compareDisplay) end sandboxLinks = sandboxLink .. ' ' .. makeToolbar(sandboxEditLink, compareLink) else local sandboxPreload if subjectSpace == 828 then sandboxPreload = message('module-sandbox-preload') else sandboxPreload = message('template-sandbox-preload') end local sandboxCreateUrl = sandboxTitle:fullUrl{action = 'edit', preload = sandboxPreload} local sandboxCreateDisplay = message('sandbox-create-link-display') local sandboxCreateLink = makeUrlLink(sandboxCreateUrl, sandboxCreateDisplay) local mirrorSummary = message('mirror-edit-summary', {makeWikilink(templatePage)}) local mirrorUrl = sandboxTitle:fullUrl{action = 'edit', preload = templatePage, summary = mirrorSummary} local mirrorDisplay = message('mirror-link-display') local mirrorLink = makeUrlLink(mirrorUrl, mirrorDisplay) sandboxLinks = message('sandbox-link-display') .. ' ' .. makeToolbar(sandboxCreateLink, mirrorLink) end if testcasesTitle.exists then local testcasesPage = testcasesTitle.prefixedText local testcasesDisplay = message('testcases-link-display') local testcasesLink = makeWikilink(testcasesPage, testcasesDisplay) local testcasesEditUrl = testcasesTitle:fullUrl{action = 'edit'} local testcasesEditDisplay = message('testcases-edit-link-display') local testcasesEditLink = makeUrlLink(testcasesEditUrl, testcasesEditDisplay) testcasesLinks = testcasesLink .. ' ' .. makeToolbar(testcasesEditLink) else local testcasesPreload if subjectSpace == 828 then testcasesPreload = message('module-testcases-preload') else testcasesPreload = message('template-testcases-preload') end local testcasesCreateUrl = testcasesTitle:fullUrl{action = 'edit', preload = testcasesPreload} local testcasesCreateDisplay = message('testcases-create-link-display') local testcasesCreateLink = makeUrlLink(testcasesCreateUrl, testcasesCreateDisplay) testcasesLinks = message('testcases-link-display') .. ' ' .. makeToolbar(testcasesCreateLink) end local messageName if subjectSpace == 828 then messageName = 'experiment-blurb-module' else messageName = 'experiment-blurb-template' end return message(messageName, {sandboxLinks, testcasesLinks}) end

function p.makeCategoriesBlurb(args, env) -- Get the title object. local docTitle = env.docTitle if not docTitle then return nil end -- Make the blurb. local docPathLink = makeWikilink(docTitle.prefixedText, message('doc-link-display')) return message('add-categories-blurb', {docPathLink}) end

function p.makeSubpagesBlurb(args, env) -- Get the template title object local subjectSpace = env.subjectSpace local templateTitle = env.templateTitle if not subjectSpace or not templateTitle then return nil end -- Make the subpages blurb. local pagetype if subjectSpace == 10 then pagetype = message('template-pagetype') elseif subjectSpace == 828 then pagetype = message('module-pagetype') else pagetype = message('default-pagetype') end return makeWikilink(		'Special:PrefixIndex/' .. templateTitle.prefixedText .. '/',		message('subpages-link-display', {pagetype})	) end

function p.makePrintBlurb(args, env) -- Get the /Print title object local printTitle = env.printTitle if not printTitle then return nil end -- Make the print blurb. local ret if printTitle.exists then local printLink = makeWikilink(printTitle.prefixedText, message('print-link-display')) ret = message('print-blurb', {printLink}) local displayPrintCategory = message('display-print-category', nil, 'boolean') if displayPrintCategory then ret = ret .. makeCategoryLink(message('print-category')) end end return ret end

-- Tracking categories

function p.addTrackingCategories(env) -- Check if is transcluded on a /doc or /testcases page. local title = env.title local ret = '' local subpage = title.subpageText if message('display-strange-usage-category', nil, 'boolean') and (subpage == message('doc-subpage') or subpage == message('testcases-subpage')) then local sort = (title.namespace == 0 and message('strange-usage-category-mainspace-sort') or '') .. title.prefixedText -- Sort on namespace. ret = ret .. makeCategoryLink(message('strange-usage-category'), sort) end return ret end

return p