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Documentation

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Revision as of 09:00, 29 December 2013 by Mr. Stradivarius (talk) (finish i18n for the startBox function)

Documentation for this module may be created at Module:Documentation/doc 

-- This module implements {{documentation}}.

----------------------------------------------------------------------------
-- Configuration
----------------------------------------------------------------------------

-- Here you can set the values of the parameters and messages used in this module, so that it
-- can be easily ported to other wikis.

local cfg = {}

-- Argument names
-- The following are all names of arguments that affect the behaviour of {{documentation}}.
-- The comments next to the configuration values are the effects that the argument has
-- on the module. (Not the effects of the argument names themselves.)

cfg.livepageArg = 'livepage' -- Name of the live template; used in {{template sandbox notice}}.
cfg.headingArg = 'heading' -- Custom heading used in the start box.
cfg.preloadArg = 'preload' -- Custom preload page for creating documentation.
cfg.headingStyleArg = 'heading-style' -- Custom CSS style for the start box heading.
cfg.contentArg = 'content' -- Passes documentation content directly from the {{documentation}} invocation.
cfg.linkBoxArg = 'link box' -- Specifies a custom link box (end box) or prevents it from being generated.

-- Software settings
-- The following are software settings that may change from wiki to wiki. For example, the classes
-- defined in commons.css or the names of templates.

cfg.mainDivId = 'template-documentation' -- The "id" attribute of the main HTML "div" tag.
cfg.mainDivClasses = 'template-documentation iezoomfix' -- The CSS classes added to the main HTML "div" tag.
cfg.sandboxSubpage = 'sandbox' -- The name of the template subpage typically used for sandboxes.
cfg.sandboxNoticeTemplate = 'template sandbox notice' -- The name of the template to display at the top of sandbox pages.
cfg.sandboxNoticeLivepageParam = 1 -- The parameter of the sandbox notice template to send the cfg.livepageArg to.
cfg.protectionTemplate = 'pp-template' -- The name of the template that displays the protection icon (a padlock on enwiki).
cfg.protectionTemplateArgs = {docusage = 'yes'} -- Any arguments to send to the protection template.
cfg.docSubpage = 'doc' -- The name of the subpage typically used for documentation pages.
cfg.startBoxLinkclasses = 'mw-editsection plainlinks' -- The CSS classes used for the [view][edit][history] or [create] links in the start box.
cfg.startBoxLinkId = 'doc_editlinks' -- The HTML "id" attribute for the links in the start box.
cfg.fileDocpagePreload = 'Template:Documentation/preload-filespace' -- A preload file for documentation page in the file namespace.
cfg.docpagePreload = 'Template:Documentation/preload-filespace' -- A preload file for template documentation pages in all namespaces.

-- Display settings
-- The following settings configure the values displayed by the module.

cfg.viewLinkDisplay = 'view' -- The text to display for "view" links.
cfg.editLinkDisplay = 'edit' -- The text to display for "edit" links.
cfg.historyLinkDisplay = 'history' -- The text to display for "history" links.
cfg.purgeLinkDisplay = 'purge' -- The text to display for "purge" links.
cfg.createLinkDisplay = 'create' -- The text to display for "create" links.
cfg.sandboxLinkDisplay = 'sandbox' -- The text to display for "sandbox" links.
cfg.documentationIconWikitext = '[[File:Template-info.png|50px|link=|alt=Documentation icon]]' -- The wikitext for the icon shown at the top of the template.
cfg.templateNamespaceHeading = 'Template documentation' -- The heading shown in the template namespace.
cfg.moduleNamespaceHeading = 'Module documentation' -- The heading shown in the module namespace.
cfg.fileNamespaceHeading = 'Summary' -- The heading shown in the file namespace.
cfg.otherNamespacesHeading = 'Documentation' -- The heading shown in other namespaces.

----------------------------------------------------------------------------
-- End configuration
----------------------------------------------------------------------------

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

local p = {}

-- Constants.
local currentTitle = mw.title.getCurrentTitle()
local subjectSpace = mw.site.namespaces[currentTitle.namespace].subject.id

----------------------------------------------------------------------------
-- Helper functions
----------------------------------------------------------------------------

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

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

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 '<small style="font-style: normal;">(' .. table.concat(ret, ' &#124; ') .. ')</small>'
end	

----------------------------------------------------------------------------
-- Argument processing
----------------------------------------------------------------------------

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

----------------------------------------------------------------------------
-- Main functions
----------------------------------------------------------------------------

p.main = makeInvokeFunc('_main')

function p._main(args)
	local root = htmlBuilder.create()
	root
		.wikitext(p.protectionTemplate())
		.wikitext(p.sandboxNotice(args))
		 -- This div tag is from {{documentation/start box}}, but moving it here
		 -- so that we don't have to worry about unclosed tags.
		.tag('div')
			.attr('id', cfg.mainDivId)
			.addClass(cfg.mainDivClasses)
			.wikitext(p._startBox(args))
			.wikitext(p._content(args))
			.tag('div')
				.css('clear', 'both') -- So right or left floating items don't stick out of the doc box.
				.done()
			.done()
		.wikitext(p._endBox(args))
		.wikitext(p.addTrackingCategories())
	return tostring(root)
end

function p.sandboxNotice(args)
	local sandboxNoticeTemplate = cfg.sandboxNoticeTemplate
	if not (sandboxNoticeTemplate and currentTitle.subpageText == cfg.sandboxSubpage) then
		return nil
	end
	local frame = mw.getCurrentFrame()
	local notice = htmlBuilder.create()
	notice
		.tag('div')
			.css('clear', 'both')
			.done()
		.wikitext(frame:expandTemplate{title = sandboxNoticeTemplate, args = {[cfg.sandboxNoticeLivepageParam] = args[cfg.livepageArg]}})
	return tostring(notice)
end

function p.protectionTemplate()
	local protectionTemplate = cfg.protectionTemplate
	if not (protectionTemplate and currentTitle.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)
		-- Gets the protection level for the current page.
		local level = frame:callParserFunction('PROTECTIONLEVEL', protectionType)
		if level ~= '' then
			return level
		else
			return nil -- The parser function returns the blank string if there is no match.
		end
	end
	if getProtectionLevel('move') == 'sysop' or getProtectionLevel('edit') then
		-- The page is full-move protected, or full, template, or semi-protected.
		return frame:expandTemplate{title = protectionTemplate, args = cfg.protectionTemplateArgs}
	end
	return nil
end

p.startBox = makeInvokeFunc('_startBox')

function p._startBox(args)
	-- Arg processing from {{documentation}}.
	local preload = args[cfg.preloadArg] -- Allow custom preloads.
	local heading = args[cfg.headingArg] -- Blank values are not removed.
	local headingStyle = args[cfg.headingStyleArg]
	local content = args[cfg.contentArg]
	local docspace = p.docspace()
	local docname = args[1] -- Other docname, if fed.
	local templatePage = p.templatePage()

	-- Arg processing from {{documentation/start box2}}.
	local docpage
	if docname then
		docpage = docname
	else
		local namespace = docspace or currentTitle.nsText
		local pagename = templatePage or currentTitle.text
		docpage = namespace .. ':' .. pagename .. '/' .. cfg.docSubpage
	end
	local docTitle = mw.title.new(docpage)
	local docExist = docTitle.exists
	
	-- Output from {{documentation/start box}}.

	-- First, check the heading parameter.
	if heading == '' then
		-- Heading is defined but blank, so do nothing.
		return nil
	end

	-- Build the start box div.
	local sbox = htmlBuilder.create('div')
	sbox
		.css('padding-bottom', '3px')
		.css('border-bottom', '1px solid #aaa')
		.css('margin-bottom', '1ex')

	-- Make the heading.
	local hspan = sbox.tag('span')
	if headingStyle then
		hspan.cssText(headingStyle)
	elseif subjectSpace == 10 then
		-- We are in the template or template talk namespaces.
		hspan
			.css('font-weight', 'bold')
			.css('fond-size', '125%')
	else
		hspan.css('font-size', '150%')
	end
	if heading then
		-- "heading" has data.
		hspan.wikitext(heading)
	elseif subjectSpace == 10 then -- Template namespace
		hspan.wikitext(cfg.documentationIconWikitext .. ' ' .. cfg.templateNamespaceHeading)
	elseif subjectSpace == 828 then -- Module namespace
		hspan.wikitext(cfg.documentationIconWikitext .. ' ' .. cfg.moduleNamespaceHeading)
	elseif subjectSpace == 6 then -- File namespace
		hspan.wikitext(cfg.fileNamespaceHeading)
	else
		hspan.wikitext(cfg.otherNamespaceHeading)
	end

	-- Add the [view][edit][history][purge] or [create] links.
	-- Check for the content parameter first, as we don't need the links if the documentation
	-- content is being entered directly onto the template page.
	if not content then
		local lspan = sbox.tag('span') -- lspan is short for "link span".
		lspan
			.addClass(cfg.startBoxLinkclasses)
			.attr('id', cfg.startBoxLinkId)
		if docExist then
			local viewLink = makeWikilink(docpage, cfg.viewLinkDisplay)
			local editLink = makeUrlLink(docTitle:fullUrl{action = 'edit'}, cfg.editLinkDisplay)
			local historyLink = makeUrlLink(docTitle:fullUrl{action = 'history'}, cfg.historyLinkDisplay)
			local purgeLink = makeUrlLink(docTitle:fullUrl{action = 'purge'}, cfg.purgeLinkDisplay)
			local text = '[%s] [%s] [%s] [%s]'
			text = text:gsub('%[', '&#91;') -- Replace square brackets with HTML entities.
			text = text:gsub('%]', '&#93;')
			lspan.wikitext(mw.ustring.format(text, viewLink, editLink, historyLink, purgeLink))
		else
			if not preload then
				if subjectSpace == 6 then -- File namespace
					preload = cfg.fileDocpagePreload
				else
					preload = cfg.docpagePreload
				end
			end
			lspan.wikitext(makeUrlLink(docTitle:fullUrl{action = 'edit', preload = preload}, cfg.createLinkDisplay))
		end
	end

	return tostring(sbox)
end

p.content = makeInvokeFunc('_content')

function p._content(args)
	local content = args[cfg.contentArg]
	if not content then
		local docpage = args[1]
		if docpage and mw.title.new(docpage).exists then
			local frame = mw.getCurrentFrame()
			content = frame:preprocess('{{ ' .. docpage .. ' }}')
		else
			docpage = p.docspace() .. ':' .. p.templatePage() .. '/' .. cfg.docSubpage
			if mw.title.new(docpage).exists then
				local frame = mw.getCurrentFrame()
				content = frame:preprocess('{{ ' .. docpage .. ' }}')
			end
		end
	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

p.endBox = makeInvokeFunc('_endBox')

function p._endBox(args)
	-- Argument processing in {{documentation}}.
	local content = args[cfg.contentArg]
	local linkBox = args[cfg.linkBoxArg] -- So "link box=off" works.
	local docspace = p.docspace()
	local docname = args[1] -- Other docname, if fed.
	local templatePage = p.templatePage()

	-- Argument processing in {{documentation/end box2}}.
	local docpageRoot = (docspace or currentTitle.nsText) .. ':' .. (templatePage or currentTitle.text)
	local docpage
	if docname then
		docpage = docname
	else
		docpage = docpageRoot .. '/' .. cfg.docSubpage
	end
	local docTitle = mw.title.new(docpage)
	local docExist = docTitle.exists
	local docnameFed = args[1] and true
	local sandbox = docpageRoot .. '/' .. cfg.sandboxSubpage
	local testcases = docpageRoot .. '/testcases'
	templatePage = currentTitle.nsText .. ':' .. templatePage

	-- Output from {{documentation/end box}}
	
	-- First, 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.
	if linkBox == 'off' or not (docExist or subjectSpace == 2 or subjectSpace == 828 or subjectSpace == 10) then
		return nil
	end

	-- Assemble the arguments for {{fmbox}}.
	local fmargs = {}
	fmargs.id = 'documentation-meta-data'
	fmargs.image = 'none'
	fmargs.style = 'background-color: #ecfcf4'
	fmargs.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
		if docExist then
			-- /doc exists; link to it.
			local docLink = makeWikilink(docpage)
			local editLink = makeUrlLink(docTitle:fullUrl{action = 'edit'}, 'edit')
			local historyLink = makeUrlLink(docTitle:fullUrl{action = 'history'}, 'history')
			text = text .. 'The above [[Wikipedia:Template documentation|documentation]] is [[Wikipedia:Transclusion|transcluded]] from '
				.. docLink .. '. ' .. makeToolbar(editLink, historyLink) .. '<br />'
		elseif subjectSpace == 828 then
			-- /doc does not exist; ask to create it.
			local createLink = makeUrlLink(docTitle:fullUrl{action = 'edit', preload = 'Template:Documentation/preload-module-doc'}, 'create')
			text = text .. 'You might want to ' .. createLink .. ' a documentation page for this [[Wikipedia:Lua|Scribunto module]].<br />'
		end
		-- 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. 
			local pagePossessive = subjectSpace == 828 and "module's" or "template's"
			text = text .. 'Editors can experiment in this ' .. pagePossessive .. ' '
			local sandboxTitle = mw.title.new(sandbox)
			if sandboxTitle.exists then
				local sandboxLink = makeWikilink(sandbox, cfg.sandboxLinkDisplay)
				local sandboxEditLink = makeUrlLink(sandboxTitle:fullUrl{action = 'edit'}, 'edit')
				local compareLink = makeUrlLink(mw.title.new('Special:ComparePages'):fullUrl{page1 = templatePage, page2 = sandbox}, 'diff')
				text = text .. sandboxLink .. ' ' .. makeToolbar(sandboxEditLink, compareLink)
			else
				local sandboxPreload = 'Template:Documentation/preload-' .. (subjectSpace == 828 and 'module-' or '') .. 'sandbox'
				local sandboxCreateLink = makeUrlLink(sandboxTitle:fullUrl{action = 'edit', preload = sandboxPreload}, 'create')
				local mirrorSummary = 'Create sandbox version of ' .. makeWikilink(templatePage)
				local mirrorLink = makeUrlLink(sandboxTitle:fullUrl{action = 'edit', preload = templatePage, summary = mirrorSummary}, 'mirror')
				text = text .. cfg.sandboxLinkDisplay .. ' ' .. makeToolbar(sandboxCreateLink, mirrorLink)
			end
			text = text .. ' and '
			local testcaseTitle = mw.title.new(testcases)
			if testcaseTitle.exists then
				local testcasesLink = makeWikilink(testcases, 'testcases')
				local testcasesEditLink = makeUrlLink(testcaseTitle:fullUrl{action = 'edit'}, 'edit')
				text = text .. testcasesLink .. ' ' .. makeToolbar(testcasesEditLink)
			else
				local testcasesPreload = 'Template:Documentation/preload-' .. (subjectSpace == 828 and 'module-' or '') .. 'testcases'
				local testcasesCreateLink = makeUrlLink(testcaseTitle:fullUrl{action = 'edit', preload = testcasesPreload}, 'create')
				text = text .. 'testcases ' .. makeToolbar(testcasesCreateLink)
			end
			text = text .. ' pages. <br />'
			-- Show the categories text, but not if "content" fed or "docname fed" since then it is unclear where to add the categories.
			if not content and not docnameFed then
				text = text .. 'Please add categories to the ' .. makeWikilink(docpage, '/' .. cfg.docSubpage) .. ' subpage.'
			end
			-- Show the "subpages" link.
			if subjectSpace ~= 6 then -- Don't show the link in file space.
				local pagetype
				if subjectSpace == 10 then
					pagetype = 'template'
				elseif subjectSpace == 828 then
					pagetype = 'module'
				else
					pagetype = 'page'
				end
				text = text .. ' ' .. makeWikilink('Special:PrefixIndex/' .. templatePage .. '/', 'Subpages of this ' .. pagetype)
			end
			-- Show the "print" link if it exists.
			local printPage = templatePage .. '/Print'
			local printTitle = mw.title.new(printPage)
			if printTitle.exists then
				text = text .. '<br />A [[Help:Books/for experts#Improving the book layout|print version]] of this template exists at '
					.. makeWikilink(printPage, '/Print') .. '. If you make a change to this template, please update the print version as well.'
					.. '[[Category:Templates with print versions]]'
			end
		end
	end
	fmargs.text = text

	-- Return the fmbox output.
	return messageBox.main('fmbox', fmargs)
end

function p.addTrackingCategories()
	-- Check if {{documentation}} is transcluded on a /doc or /testcases page.
	local ret = ''
	local subpage = currentTitle.subpageText
	if subpage == cfg.docSubpage or subpage == 'testcases' then
		local sort = (currentTitle.namespace == 0 and 'Main:' or '') .. currentTitle.prefixedText -- Sort on namespace.
		ret = ret .. makeWikilink('Category:Wikipedia pages with strange ((documentation)) usage', sort)
	end
	return ret
end

function p.docspace()
	-- Determines the namespace of the documentation.
	if subjectSpace == 0 or subjectSpace == 6 or subjectSpace == 8 or subjectSpace == 14 then
		-- Pages in the Article, File, MediaWiki or Category namespaces must have their
		-- /doc, /sandbox and /testcases pages in talk space.
		return mw.site.namespaces[subjectSpace].talk.name 
	else
		return currentTitle.subjectNsText
	end
end

function p.templatePage()
	-- Determines the template page. No namespace or interwiki prefixes are included.
	local subpage = currentTitle.subpageText
	if subpage == cfg.sandboxSubpage or subpage == 'testcases' then
		return currentTitle.baseText
	else
		return currentTitle.text
	end
end

return p
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