Module:Navbox

This Lua module is used on approximately 4,640,000 pages, or roughly 904483% of all pages.
To avoid major disruption and server load, any changes should be tested in the module's /sandbox or /testcases subpages, or in your own module sandbox. The tested changes can be added to this page in a single edit. Consider discussing changes on the talk page before implementing them.
This module is subject to page protection. It is a highly visible module in use by a very large number of pages, or is substituted very frequently. Because vandalism or mistakes would affect many pages, and even trivial editing might cause substantial load on the servers, it is protected from editing.
This module depends on the following other modules:
This module uses TemplateStyles:
This module implements the {{Navbox}} template. Please see the template page for usage instructions.
Tracking/maintenance categories

require('strict')
local p = {}
local cfg = mw.loadData('Module:Navbox/configuration')
local inArray = require("Module:TableTools").inArray
local getArgs -- lazily initialized
local format = string.format

function p._navbox(args)
	local function striped(wikitext, border)
		-- Return wikitext with markers replaced for odd/even striping.
		-- Child (subgroup) navboxes are flagged with a category that is removed
		-- by parent navboxes. The result is that the category shows all pages
		-- where a child navbox is not contained in a parent navbox.
		local orphanCat = cfg.category.orphan
		if border == cfg.keyword.border_subgroup and args[cfg.arg.orphan] ~= cfg.keyword.orphan_yes then
			-- No change; striping occurs in outermost navbox.
			return wikitext .. orphanCat
		end
		local first, second = cfg.class.navbox_odd_part, cfg.class.navbox_even_part
		if args[cfg.arg.evenodd] then
			if args[cfg.arg.evenodd] == cfg.keyword.evenodd_swap then
				first, second = second, first
			else
				first = args[cfg.arg.evenodd]
				second = first
			end
		end
		local changer
		if first == second then
			changer = first
		else
			local index = 0
			changer = function (code)
				if code == '0' then
					-- Current occurrence is for a group before a nested table.
					-- Set it to first as a valid although pointless class.
					-- The next occurrence will be the first row after a title
					-- in a subgroup and will also be first.
					index = 0
					return first
				end
				index = index + 1
				return index % 2 == 1 and first or second
			end
		end
		local regex = orphanCat:gsub('([%[%]])', '%%%1')
		return (wikitext:gsub(regex, ''):gsub(cfg.marker.regex, changer)) -- () omits gsub count
	end
	
	local function processItem(item, nowrapitems)
		if item:sub(1, 2) == '{|' then
			-- Applying nowrap to lines in a table does not make sense.
			-- Add newlines to compensate for trim of x in |parm=x in a template.
			return '\n' .. item ..'\n'
		end
		if nowrapitems == cfg.keyword.nowrapitems_yes then
			local lines = {}
			for line in (item .. '\n'):gmatch('([^\n]*)\n') do
				local prefix, content = line:match('^([*:;#]+)%s*(.*)')
				if prefix and not content:match(cfg.pattern.nowrap) then
					line = format(cfg.nowrap_item, prefix, content)
				end
				table.insert(lines, line)
			end
			item = table.concat(lines, '\n')
		end
		if item:match('^[*:;#]') then
			return '\n' .. item ..'\n'
		end
		return item
	end
	
	local function has_navbar()
		return args[cfg.arg.navbar] ~= cfg.keyword.navbar_off
			and args[cfg.arg.navbar] ~= cfg.keyword.navbar_plain
			and (
				args[cfg.arg.name]
				or mw.getCurrentFrame():getParent():getTitle():gsub(cfg.pattern.sandbox, '')
					~= cfg.pattern.navbox
			)
	end
	
	-- extract text color from css, which is the only permitted inline CSS for the navbar
	local function extract_color(css_str)
		-- return nil because navbar takes its argument into mw.html which handles
		-- nil gracefully, removing the associated style attribute
		return mw.ustring.match(';' .. css_str .. ';', '.*;%s*([Cc][Oo][Ll][Oo][Rr]%s*:%s*.-)%s*;') or nil
	end
	
	local function renderNavBar(titleCell)
		if has_navbar() then
			local navbar = require('Module:Navbar')._navbar
			titleCell:wikitext(navbar{
				[cfg.navbar.name] = args[cfg.arg.name],
				[cfg.navbar.mini] = 1,
				[cfg.navbar.fontstyle] = extract_color(
					(args[cfg.arg.basestyle] or '') .. ';' .. (args[cfg.arg.titlestyle] or '')
				)
			})
		end
	
	end
	
	local function renderTitleRow(tbl)
		if not args[cfg.arg.title] then return end
	
		local titleRow = tbl:tag('tr')
	
		local titleCell = titleRow:tag('th'):attr('scope', 'col')
	
		local titleColspan = 2
		if args[cfg.arg.imageleft] then titleColspan = titleColspan + 1 end
		if args[cfg.arg.image] then titleColspan = titleColspan + 1 end
	
		titleCell
			:cssText(args[cfg.arg.basestyle])
			:cssText(args[cfg.arg.titlestyle])
			:addClass(cfg.class.navbox_title)
			:attr('colspan', titleColspan)
	
		renderNavBar(titleCell)
	
		titleCell
			:tag('div')
				-- id for aria-labelledby attribute
				:attr('id', mw.uri.anchorEncode(args[cfg.arg.title]))
				:addClass(args[cfg.arg.titleclass])
				:css('font-size', '114%')
				:css('margin', '0 4em')
				:wikitext(processItem(args[cfg.arg.title]))
	end
	
	local function getAboveBelowColspan()
		local ret = 2
		if args[cfg.arg.imageleft] then ret = ret + 1 end
		if args[cfg.arg.image] then ret = ret + 1 end
		return ret
	end
	
	local function renderAboveRow(tbl)
		if not args[cfg.arg.above] then return end
	
		tbl:tag('tr')
			:tag('td')
				:addClass(cfg.class.navbox_abovebelow)
				:addClass(args[cfg.arg.aboveclass])
				:cssText(args[cfg.arg.basestyle])
				:cssText(args[cfg.arg.abovestyle])
				:attr('colspan', getAboveBelowColspan())
				:tag('div')
					-- id for aria-labelledby attribute, if no title
					:attr('id', (not args[cfg.arg.title]) and mw.uri.anchorEncode(args[cfg.arg.above]) or nil)
					:wikitext(processItem(args[cfg.arg.above], args[cfg.arg.nowrapitems]))
	end
	
	local function renderBelowRow(tbl)
		if not args[cfg.arg.below] then return end
	
		tbl:tag('tr')
			:tag('td')
				:addClass(cfg.class.navbox_abovebelow)
				:addClass(args[cfg.arg.belowclass])
				:cssText(args[cfg.arg.basestyle])
				:cssText(args[cfg.arg.belowstyle])
				:attr('colspan', getAboveBelowColspan())
				:tag('div')
					:wikitext(processItem(args[cfg.arg.below], args[cfg.arg.nowrapitems]))
	end
	
	local function renderListRow(tbl, index, listnum, listnums_size)
		local row = tbl:tag('tr')
	
		if index == 1 and args[cfg.arg.imageleft] then
			row
				:tag('td')
					:addClass(cfg.class.noviewer)
					:addClass(cfg.class.navbox_image)
					:addClass(args[cfg.arg.imageclass])
					:css('width', '1px')               -- Minimize width
					:css('padding', '0 2px 0 0')
					:cssText(args[cfg.arg.imageleftstyle])
					:attr('rowspan', listnums_size)
					:tag('div')
						:wikitext(processItem(args[cfg.arg.imageleft]))
		end
	
		local group_and_num = format(cfg.arg.group_and_num, listnum)
		local groupstyle_and_num = format(cfg.arg.groupstyle_and_num, listnum)
		if args[group_and_num] then
			local groupCell = row:tag('th')
	
			-- id for aria-labelledby attribute, if lone group with no title or above
			if listnum == 1 and not (args[cfg.arg.title] or args[cfg.arg.above] or args[cfg.arg.group2]) then
				groupCell
					:attr('id', mw.uri.anchorEncode(args[cfg.arg.group1]))
			end
	
			groupCell
				:attr('scope', 'row')
				:addClass(cfg.class.navbox_group)
				:addClass(args[cfg.arg.groupclass])
				:cssText(args[cfg.arg.basestyle])
				-- If groupwidth not specified, minimize width
				:css('width', args[cfg.arg.groupwidth] or '1%')
	
			groupCell
				:cssText(args[cfg.arg.groupstyle])
				:cssText(args[groupstyle_and_num])
				:wikitext(args[group_and_num])
		end
	
		local listCell = row:tag('td')
	
		if args[group_and_num] then
			listCell
				:addClass(cfg.class.navbox_list_with_group)
		else
			listCell:attr('colspan', 2)
		end
	
		if not args[cfg.arg.groupwidth] then
			listCell:css('width', '100%')
		end
	
		local rowstyle  -- usually nil so cssText(rowstyle) usually adds nothing
		if index % 2 == 1 then
			rowstyle = args[cfg.arg.oddstyle]
		else
			rowstyle = args[cfg.arg.evenstyle]
		end
	
		local list_and_num = format(cfg.arg.list_and_num, listnum)
		local listText = args[list_and_num]
		
		if inArray(cfg.keyword.subgroups, listText) then
			local childArgs = {
				[cfg.arg.border] = cfg.keyword.border_subgroup,
				[cfg.arg.navbar] = cfg.keyword.navbar_plain
			}
			local hasChildArgs = false
			for k, v in pairs(args) do
				k = tostring(k)
				for _, w in ipairs(cfg.keyword.subgroups) do
					w = w .. listnum .. "_"
					if (#k > #w) and (k:sub(1, #w) == w) then
						childArgs[k:sub(#w + 1)] = v
						hasChildArgs = true
					end
				end
			end
			listText = hasChildArgs and p._navbox(childArgs) or listText
		end
		
		local oddEven = cfg.marker.oddeven
		if listText:sub(1, 12) == '</div><table' then
			-- Assume list text is for a subgroup navbox so no automatic striping for this row.
			oddEven = listText:find(cfg.pattern.navbox_title) and cfg.marker.restart or cfg.class.navbox_odd_part
		end
		
		local liststyle_and_num = format(cfg.arg.liststyle_and_num, listnum)
		local listclass_and_num = format(cfg.arg.listclass_and_num, listnum)
		listCell
			:css('padding', '0')
			:cssText(args[cfg.arg.liststyle])
			:cssText(rowstyle)
			:cssText(args[liststyle_and_num])
			:addClass(cfg.class.navbox_list)
			:addClass(cfg.class.navbox_part .. oddEven)
			:addClass(args[cfg.arg.listclass])
			:addClass(args[listclass_and_num])
			:tag('div')
				:css('padding',
					(index == 1 and args[cfg.arg.list1padding]) or args[cfg.arg.listpadding] or '0 0.25em'
				)
				:wikitext(processItem(listText, args[cfg.arg.nowrapitems]))
	
		if index == 1 and args[cfg.arg.image] then
			row
				:tag('td')
					:addClass(cfg.class.noviewer)
					:addClass(cfg.class.navbox_image)
					:addClass(args[cfg.arg.imageclass])
					:css('width', '1px')               -- Minimize width
					:css('padding', '0 0 0 2px')
					:cssText(args[cfg.arg.imagestyle])
					:attr('rowspan', listnums_size)
					:tag('div')
						:wikitext(processItem(args[cfg.arg.image]))
		end
	end
	
	local function has_list_class(htmlclass)
		local patterns = {
			'^' .. htmlclass .. '$',
			'%s' .. htmlclass .. '$',
			'^' .. htmlclass .. '%s',
			'%s' .. htmlclass .. '%s'
		}
		
		for arg, _ in pairs(args) do
			if type(arg) == 'string' and mw.ustring.find(arg, cfg.pattern.class) then
				for _, pattern in ipairs(patterns) do
					if mw.ustring.find(args[arg] or '', pattern) then
						return true
					end
				end
			end
		end
		return false
	end
	
	-- there are a lot of list classes in the wild, so we add their TemplateStyles
	local function add_list_styles()
		local frame = mw.getCurrentFrame()
		local function add_list_templatestyles(htmlclass, templatestyles)
			if has_list_class(htmlclass) then
				return frame:extensionTag{
					name = 'templatestyles', args = { src = templatestyles }
				}
			else
				return ''
			end
		end
		
		local hlist_styles = add_list_templatestyles('hlist', cfg.hlist_templatestyles)
		local plainlist_styles = add_list_templatestyles('plainlist', cfg.plainlist_templatestyles)
		
		-- a second workaround for [[phab:T303378]]
		-- when that issue is fixed, we can actually use has_navbar not to emit the
		-- tag here if we want
		if has_navbar() and hlist_styles == '' then
			hlist_styles = frame:extensionTag{
				name = 'templatestyles', args = { src = cfg.hlist_templatestyles }
			}
		end
		
		-- hlist -> plainlist is best-effort to preserve old Common.css ordering.
		-- this ordering is not a guarantee because most navboxes will emit only
		-- one of these classes [hlist_note]
		return hlist_styles .. plainlist_styles
	end
	
	local function needsHorizontalLists(border)
		if border == cfg.keyword.border_subgroup or args[cfg.arg.tracking] == cfg.keyword.tracking_no then
			return false
		end
		return not has_list_class(cfg.pattern.hlist) and not has_list_class(cfg.pattern.plainlist)
	end
	
	local function hasBackgroundColors()
		for _, key in ipairs({cfg.arg.titlestyle, cfg.arg.groupstyle,
			cfg.arg.basestyle, cfg.arg.abovestyle, cfg.arg.belowstyle}) do
			if tostring(args[key]):find('background', 1, true) then
				return true
			end
		end
		return false
	end
	
	local function hasBorders()
		for _, key in ipairs({cfg.arg.groupstyle, cfg.arg.basestyle,
			cfg.arg.abovestyle, cfg.arg.belowstyle}) do
			if tostring(args[key]):find('border', 1, true) then
				return true
			end
		end
		return false
	end
	
	local function isIllegible()
		local styleratio = require('Module:Color contrast')._styleratio
		for key, style in pairs(args) do
			if tostring(key):match(cfg.pattern.style) then
				if styleratio{mw.text.unstripNoWiki(style)} < 4.5 then
					return true
				end
			end
		end
		return false
	end
	
	local function getTrackingCategories(border)
		local cats = {}
		if needsHorizontalLists(border) then table.insert(cats, cfg.category.horizontal_lists) end
		if hasBackgroundColors() then table.insert(cats, cfg.category.background_colors) end
		if isIllegible() then table.insert(cats, cfg.category.illegible) end
		if hasBorders() then table.insert(cats, cfg.category.borders) end
		return cats
	end
	
	local function renderTrackingCategories(builder, border)
		local title = mw.title.getCurrentTitle()
		if title.namespace ~= 10 then return end -- not in template space
		local subpage = title.subpageText
		if subpage == cfg.keyword.subpage_doc or subpage == cfg.keyword.subpage_sandbox
			or subpage == cfg.keyword.subpage_testcases then return end
	
		for _, cat in ipairs(getTrackingCategories(border)) do
			builder:wikitext('[[Category:' .. cat .. ']]')
		end
	end
	
	local function renderMainTable(border, listnums)
		local tbl = mw.html.create('table')
			:addClass(cfg.class.nowraplinks)
			:addClass(args[cfg.arg.bodyclass])
	
		local state = args[cfg.arg.state]
		if args[cfg.arg.title] and state ~= cfg.keyword.state_plain and state ~= cfg.keyword.state_off then
			if state == cfg.keyword.state_collapsed then
				state = cfg.class.collapsed
			end
			tbl
				:addClass(cfg.class.collapsible)
				:addClass(state or cfg.class.autocollapse)
		end
	
		tbl:css('border-spacing', 0)
		if border == cfg.keyword.border_subgroup or border == cfg.keyword.border_none then
			tbl
				:addClass(cfg.class.navbox_subgroup)
				:cssText(args[cfg.arg.bodystyle])
				:cssText(args[cfg.arg.style])
		else  -- regular navbox - bodystyle and style will be applied to the wrapper table
			tbl
				:addClass(cfg.class.navbox_inner)
				:css('background', 'transparent')
				:css('color', 'inherit')
		end
		tbl:cssText(args[cfg.arg.innerstyle])
	
		renderTitleRow(tbl)
		renderAboveRow(tbl)
		local listnums_size = #listnums
		for i, listnum in ipairs(listnums) do
			renderListRow(tbl, i, listnum, listnums_size)
		end
		renderBelowRow(tbl)
	
		return tbl
	end
	
	local function add_navbox_styles(hiding_templatestyles)
		local frame = mw.getCurrentFrame()
		-- This is a lambda so that it doesn't need the frame as a parameter
		local function add_user_styles(templatestyles)
			if templatestyles and templatestyles ~= '' then
				return frame:extensionTag{
					name = 'templatestyles', args = { src = templatestyles }
				}
			end
			return ''
		end
	
		-- get templatestyles. load base from config so that Lua only needs to do
		-- the work once of parser tag expansion
		local base_templatestyles = cfg.templatestyles
		local templatestyles = add_user_styles(args[cfg.arg.templatestyles])
		local child_templatestyles = add_user_styles(args[cfg.arg.child_templatestyles])
	
		-- The 'navbox-styles' div exists to wrap the styles to work around T200206
		-- more elegantly. Instead of combinatorial rules, this ends up being linear
		-- number of CSS rules.
		return mw.html.create('div')
			:addClass(cfg.class.navbox_styles)
			:wikitext(
				add_list_styles() .. -- see [hlist_note] applied to 'before base_templatestyles'
				base_templatestyles ..
				templatestyles ..
				child_templatestyles ..
				table.concat(hiding_templatestyles)
			)
			:done()
	end
	
	-- work around [[phab:T303378]]
	-- for each arg: find all the templatestyles strip markers, insert them into a
	-- table. then remove all templatestyles markers from the arg
	local function move_hiding_templatestyles(args)
		local gfind = string.gfind
		local gsub = string.gsub
		local templatestyles_markers = {}
		local strip_marker_pattern = '(\127[^\127]*UNIQ%-%-templatestyles%-%x+%-QINU[^\127]*\127)'
		for k, arg in pairs(args) do
			for marker in gfind(arg, strip_marker_pattern) do
				table.insert(templatestyles_markers, marker)
			end
			args[k] = gsub(arg, strip_marker_pattern, '')
		end
		return templatestyles_markers
	end
	
	local hiding_templatestyles = move_hiding_templatestyles(args)
	local listnums = {}
	
	for k, _ in pairs(args) do
		if type(k) == 'string' then
			local listnum = k:match(cfg.pattern.listnum)
			if listnum then table.insert(listnums, tonumber(listnum)) end
		end
	end
	table.sort(listnums)

	local border = mw.text.trim(args[cfg.arg.border] or args[1] or '')
	if border == cfg.keyword.border_child then
		border = cfg.keyword.border_subgroup
	end

	-- render the main body of the navbox
	local tbl = renderMainTable(border, listnums)

	local res = mw.html.create()
	-- render the appropriate wrapper for the navbox, based on the border param

	if border == cfg.keyword.border_none then
		res:node(add_navbox_styles(hiding_templatestyles))
		local nav = res:tag('div')
			:attr('role', 'navigation')
			:node(tbl)
		-- aria-labelledby title, otherwise above, otherwise lone group
		if args[cfg.arg.title] or args[cfg.arg.above] or (args[cfg.arg.group1]
			and not args[cfg.arg.group2]) then
			nav:attr(
				'aria-labelledby',
				mw.uri.anchorEncode(
					args[cfg.arg.title] or args[cfg.arg.above] or args[cfg.arg.group1]
				)
			)
		else
			nav:attr('aria-label', cfg.aria_label)
		end
	elseif border == cfg.keyword.border_subgroup then
		-- We assume that this navbox is being rendered in a list cell of a
		-- parent navbox, and is therefore inside a div with padding:0em 0.25em.
		-- We start with a </div> to avoid the padding being applied, and at the
		-- end add a <div> to balance out the parent's </div>
		res
			:wikitext('</div>')
			:node(tbl)
			:wikitext('<div>')
	else
		res:node(add_navbox_styles(hiding_templatestyles))
		local nav = res:tag('div')
			:attr('role', 'navigation')
			:addClass(cfg.class.navbox)
			:addClass(args[cfg.arg.navboxclass])
			:cssText(args[cfg.arg.bodystyle])
			:cssText(args[cfg.arg.style])
			:css('padding', '3px')
			:node(tbl)
		-- aria-labelledby title, otherwise above, otherwise lone group
		if args[cfg.arg.title] or args[cfg.arg.above]
			or (args[cfg.arg.group1] and not args[cfg.arg.group2]) then
			nav:attr(
				'aria-labelledby',
				mw.uri.anchorEncode(args[cfg.arg.title] or args[cfg.arg.above] or args[cfg.arg.group1])
			)
		else
			nav:attr('aria-label', cfg.aria_label)
		end
	end

	if (args[cfg.arg.nocat] or cfg.keyword.nocat_false):lower() == cfg.keyword.nocat_false then
		renderTrackingCategories(res, border)
	end
	return striped(tostring(res), border)
end

function p.navbox(frame)
	local function readArgs(args, prefix)
		-- Read the arguments in the order they'll be output in, to make references
		-- number in the right order.
		local _
		_ = args[prefix .. cfg.arg.title]
		_ = args[prefix .. cfg.arg.above]
		-- Limit this to 20 as covering 'most' cases (that's a SWAG) and because
		-- iterator approach won't work here
		for i = 1, 20 do
			_ = args[prefix .. format(cfg.arg.group_and_num, i)]
			if inArray(cfg.keyword.subgroups, args[prefix .. format(cfg.arg.list_and_num, i)]) then
				for _, v in ipairs(cfg.keyword.subgroups) do
					readArgs(args, prefix .. v .. i .. "_")
				end
			end
		end
		_ = args[prefix .. cfg.arg.below]
	end

	if not getArgs then
		getArgs = require('Module:Arguments').getArgs
	end
	local args = getArgs(frame, {wrappers = {cfg.pattern.navbox}})
	readArgs(args, "")
	return p._navbox(args)
end

return p
Module:Navbox

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