Module:Navbox

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

--
-- This module implements {{Navbox}}
--

local p = {}

local navbar = require('Module:Navbar')._navbar
local getArgs -- lazily initialized

local args
local border
local listnums
local ODD_EVEN_MARKER = '\127_ODDEVEN_\127'
local RESTART_MARKER = '\127_ODDEVEN0_\127'
local REGEX_MARKER = '\127_ODDEVEN(%d?)_\127'

local function striped(wikitext)
	-- 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 = '[[Category:Navbox orphans]]'
	if border == 'subgroup' and args.orphan ~= 'yes' then
		-- No change; striping occurs in outermost navbox.
		return wikitext .. orphanCat
	end
	local first, second = 'odd', 'even'
	if args.evenodd then
		if args.evenodd == 'swap' then
			first, second = second, first
		else
			first = args.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(REGEX_MARKER, 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 == '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('^<span class="nowrap">') then
				line = prefix .. '<span class="nowrap">' .. content .. '</span>'
			end
			table.insert(lines, line)
		end
		item = table.concat(lines, '\n')
	end
	if item:match('^[*:;#]') then
		return '\n' .. item ..'\n'
	end
	return item
end

-- Separate function so that we can evaluate properly whether hlist should
-- be added by the module
local function has_navbar()
	return args.navbar ~= 'off' and args.navbar ~= 'plain' and not
		(not args.name and mw.getCurrentFrame():getParent():getTitle():gsub('/sandbox$', '') == 'Template:Navbox')
end

local function renderNavBar(titleCell)

	if has_navbar() then
		titleCell:wikitext(navbar{
			args.name,
			-- we depend on this being mini = 1 when the navbox module decides
			-- to add hlist templatestyles. we also depend on navbar outputting
			-- a copy of the hlist templatestyles.
			mini = 1,
			fontstyle = (args.basestyle or '') .. ';' .. (args.titlestyle or '') .. ';background:none transparent;border:none;box-shadow:none; padding:0;'
		})
	end

end

--
--   Title row
--
local function renderTitleRow(tbl)
	if not args.title then return end

	local titleRow = tbl:tag('tr')

	if args.titlegroup then
		titleRow
			:tag('th')
				:attr('scope', 'row')
				:addClass('navbox-group')
				:addClass(args.titlegroupclass)
				:cssText(args.basestyle)
				:cssText(args.groupstyle)
				:cssText(args.titlegroupstyle)
				:wikitext(args.titlegroup)
	end

	local titleCell = titleRow:tag('th'):attr('scope', 'col')

	if args.titlegroup then
		titleCell
			:addClass('navbox-title1')
	end

	local titleColspan = 2
	if args.imageleft then titleColspan = titleColspan + 1 end
	if args.image then titleColspan = titleColspan + 1 end
	if args.titlegroup then titleColspan = titleColspan - 1 end

	titleCell
		:cssText(args.basestyle)
		:cssText(args.titlestyle)
		:addClass('navbox-title')
		:attr('colspan', titleColspan)

	renderNavBar(titleCell)

	titleCell
		:tag('div')
			-- id for aria-labelledby attribute
			:attr('id', mw.uri.anchorEncode(args.title))
			:addClass(args.titleclass)
			:css('font-size', '114%')
			:css('margin', '0 4em')
			:wikitext(processItem(args.title))
end

--
--   Above/Below rows
--

local function getAboveBelowColspan()
	local ret = 2
	if args.imageleft then ret = ret + 1 end
	if args.image then ret = ret + 1 end
	return ret
end

local function renderAboveRow(tbl)
	if not args.above then return end

	tbl:tag('tr')
		:tag('td')
			:addClass('navbox-abovebelow')
			:addClass(args.aboveclass)
			:cssText(args.basestyle)
			:cssText(args.abovestyle)
			:attr('colspan', getAboveBelowColspan())
			:tag('div')
				-- id for aria-labelledby attribute, if no title
				:attr('id', args.title and nil or mw.uri.anchorEncode(args.above))
				:wikitext(processItem(args.above, args.nowrapitems))
end

local function renderBelowRow(tbl)
	if not args.below then return end

	tbl:tag('tr')
		:tag('td')
			:addClass('navbox-abovebelow')
			:addClass(args.belowclass)
			:cssText(args.basestyle)
			:cssText(args.belowstyle)
			:attr('colspan', getAboveBelowColspan())
			:tag('div')
				:wikitext(processItem(args.below, args.nowrapitems))
end

--
--   List rows
--
local function renderListRow(tbl, index, listnum)
	local row = tbl:tag('tr')

	if index == 1 and args.imageleft then
		row
			:tag('td')
				:addClass('navbox-image')
				:addClass(args.imageclass)
				:css('width', '1px')               -- Minimize width
				:css('padding', '0px 2px 0px 0px')
				:cssText(args.imageleftstyle)
				:attr('rowspan', #listnums)
				:tag('div')
					:wikitext(processItem(args.imageleft))
	end

	if args['group' .. listnum] 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.title or args.above or args.group2) then
			groupCell
				:attr('id', mw.uri.anchorEncode(args.group1))
		end

		groupCell
			:attr('scope', 'row')
			:addClass('navbox-group')
			:addClass(args.groupclass)
			:cssText(args.basestyle)
			:css('width', args.groupwidth or '1%') -- If groupwidth not specified, minimize width

		groupCell
			:cssText(args.groupstyle)
			:cssText(args['group' .. listnum .. 'style'])
			:wikitext(args['group' .. listnum])
	end

	local listCell = row:tag('td')

	if args['group' .. listnum] then
		listCell
			:addClass('navbox-list1')
	else
		listCell:attr('colspan', 2)
	end

	if not args.groupwidth then
		listCell:css('width', '100%')
	end

	local rowstyle  -- usually nil so cssText(rowstyle) usually adds nothing
	if index % 2 == 1 then
		rowstyle = args.oddstyle
	else
		rowstyle = args.evenstyle
	end

	local listText = args['list' .. listnum]
	local oddEven = ODD_EVEN_MARKER
	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('<th[^>]*"navbox%-title"') and RESTART_MARKER or 'odd'
	end
	listCell
		:css('padding', '0px')
		:cssText(args.liststyle)
		:cssText(rowstyle)
		:cssText(args['list' .. listnum .. 'style'])
		:addClass('navbox-list')
		:addClass('navbox-' .. oddEven)
		:addClass(args.listclass)
		:addClass(args['list' .. listnum .. 'class'])
		:tag('div')
			:css('padding', (index == 1 and args.list1padding) or args.listpadding or '0em 0.25em')
			:wikitext(processItem(listText, args.nowrapitems))

	if index == 1 and args.image then
		row
			:tag('td')
				:addClass('navbox-image')
				:addClass(args.imageclass)
				:css('width', '1px')               -- Minimize width
				:css('padding', '0px 0px 0px 2px')
				:cssText(args.imagestyle)
				:attr('rowspan', #listnums)
				:tag('div')
					:wikitext(processItem(args.image))
	end
end


--
--   Tracking categories
--

local function needsHorizontalLists()
	if border == 'subgroup' or args.tracking == 'no' then
		return false
	end
	local listClasses = {
		['plainlist'] = true, ['hlist'] = true, ['hlist hnum'] = true,
		['hlist hwrap'] = true, ['hlist vcard'] = true, ['vcard hlist'] = true,
		['hlist vevent'] = true,
	}
	return not (listClasses[args.listclass] or listClasses[args.bodyclass])
end

-- there are a lot of list classes in the wild, so we have a function to find
-- them and add their TemplateStyles
local function addListStyles()
	local frame = mw.getCurrentFrame()
	-- TODO?: Should maybe take a table of classes for e.g. hnum, hwrap as above
	-- I'm going to do the stupid thing first though
	-- Also not sure hnum and hwrap are going to live in the same TemplateStyles
	-- as hlist
	local function _addListStyles(htmlclass, templatestyles)
		local class_args = { -- rough order of probability of use
			'bodyclass', 'listclass', 'aboveclass', 'belowclass', 'titleclass',
			'navboxclass', 'groupclass', 'titlegroupclass', 'imageclass'
		}
		local patterns = {
			'^' .. htmlclass .. '$',
			'%s' .. htmlclass .. '$',
			'^' .. htmlclass .. '%s',
			'%s' .. htmlclass .. '%s'
		}
		
		local found = false
		for _, arg in ipairs(class_args) do
			for _, pattern in ipairs(patterns) do
				if mw.ustring.find(args[arg] or '', pattern) then
					found = true
					break
				end
			end
			if found then break end
		end
		if found then
			return frame:extensionTag{
				name = 'templatestyles', args = { src = templatestyles }
			}
		else
			return ''
		end
	end
	
	local hlist_styles = ''
	-- navbar always has mini = 1, so here (on this wiki) we can assume that
	-- we don't need to output hlist styles in navbox again.
	if not has_navbar() then
		hlist_styles = _addListStyles('hlist', 'Flatlist/styles.css')
	end
	local plainlist_styles = _addListStyles('plainlist', 'Plainlist/styles.css')
	
	return hlist_styles .. plainlist_styles
end

local function hasBackgroundColors()
	for _, key in ipairs({'titlestyle', 'groupstyle', 'basestyle', 'abovestyle', 'belowstyle'}) do
		if tostring(args[key]):find('background', 1, true) then
			return true
		end
	end
end

local function hasBorders()
	for _, key in ipairs({'groupstyle', 'basestyle', 'abovestyle', 'belowstyle'}) do
		if tostring(args[key]):find('border', 1, true) then
			return true
		end
	end
end

local function isIllegible()
	-- require('Module:Color contrast') absent on mediawiki.org
	return false
end

local function getTrackingCategories()
	local cats = {}
	if isIllegible() then table.insert(cats, 'Potentially illegible navboxes') end
	return cats
end

local function renderTrackingCategories(builder)
	local title = mw.title.getCurrentTitle()
	if title.namespace ~= 10 then return end -- not in template space
	local subpage = title.subpageText
	if subpage == 'doc' or subpage == 'sandbox' or subpage == 'testcases' then return end

	for _, cat in ipairs(getTrackingCategories()) do
		builder:wikitext('[[Category:' .. cat .. ']]')
	end
end

--
--   Main navbox tables
--
local function renderMainTable()
	local tbl = mw.html.create('table')
		:addClass('nowraplinks')
		:addClass(args.bodyclass)

	if args.title and (args.state ~= 'plain' and args.state ~= 'off') then
		if args.state == 'collapsed' then args.state = 'mw-collapsed' end
		tbl
			:addClass('mw-collapsible')
			:addClass(args.state or 'autocollapse')
	end

	tbl:css('border-spacing', 0)
	if border == 'subgroup' or border == 'none' then
		tbl
			:addClass('navbox-subgroup')
			:cssText(args.bodystyle)
			:cssText(args.style)
	else  -- regular navbox - bodystyle and style will be applied to the wrapper table
		tbl
			:addClass('navbox-inner')
			:css('background', 'transparent')
			:css('color', 'inherit')
	end
	tbl:cssText(args.innerstyle)

	renderTitleRow(tbl)
	renderAboveRow(tbl)
	for i, listnum in ipairs(listnums) do
		renderListRow(tbl, i, listnum)
	end
	renderBelowRow(tbl)

	return tbl
end

function p._navbox(navboxArgs)
	args = navboxArgs
	listnums = {}

	for k, _ in pairs(args) do
		if type(k) == 'string' then
			local listnum = k:match('^list(%d+)$')
			if listnum then table.insert(listnums, tonumber(listnum)) end
		end
	end
	table.sort(listnums)

	border = mw.text.trim(args.border or args[1] or '')
	if border == 'child' then
		border = 'subgroup'
	end

	-- render the main body of the navbox
	local tbl = renderMainTable()
	
	-- get templatestyles
	local frame = mw.getCurrentFrame()
	local base_templatestyles = frame:extensionTag{
		name = 'templatestyles', args = { src = 'Module:Navbox/styles.css' }
	}
	local templatestyles = ''
	if args.templatestyles and args.templatestyles ~= '' then
		templatestyles = frame:extensionTag{
			name = 'templatestyles', args = { src = args.templatestyles }
		}
	end
	
	local res = mw.html.create()
	-- 'navbox-styles' exists for two reasons:
	--  1. To wrap the styles to work around phab: T200206 more elegantly. Instead
	--	   of combinatorial rules, this ends up being linear number of CSS rules.
	--  2. To allow MobileFrontend to rip the styles out with 'nomobile' such that
	--     they are not dumped into the mobile view.
	res:tag('div')
		:addClass('navbox-styles')
		:addClass('nomobile')
		:wikitext(base_templatestyles .. templatestyles)
		:done()
	
	-- render the appropriate wrapper around the navbox, depending on the border param
	if border == 'none' then
		local nav = res:tag('div')
			:attr('role', 'navigation')
			:wikitext(addListStyles())
			:node(tbl)
		-- aria-labelledby title, otherwise above, otherwise lone group
		if args.title or args.above or (args.group1 and not args.group2) then
			nav:attr('aria-labelledby', mw.uri.anchorEncode(args.title or args.above or args.group1))
		else
			nav:attr('aria-label', 'Navbox')
		end
	elseif 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>')
			:wikitext(addListStyles())
			:node(tbl)
			:wikitext('<div>')
	else
		local nav = res:tag('div')
			:attr('role', 'navigation')
			:addClass('navbox')
			:addClass(args.navboxclass)
			:cssText(args.bodystyle)
			:cssText(args.style)
			:css('padding', '3px')
			:wikitext(addListStyles())
			:node(tbl)
		-- aria-labelledby title, otherwise above, otherwise lone group
		if args.title or args.above or (args.group1 and not args.group2) then
			nav:attr('aria-labelledby', mw.uri.anchorEncode(args.title or args.above or args.group1))
		else
			nav:attr('aria-label', 'Navbox')
		end
	end

	if (args.nocat or 'false'):lower() == 'false' then
		renderTrackingCategories(res)
	end

	return striped(tostring(res))
end

function p.navbox(frame)
	if not getArgs then
		getArgs = require('Module:Arguments').getArgs
	end
	args = getArgs(frame, {wrappers = {'Template:Navbox', 'Template:Navbox subgroup'}})
	if frame.args.border then
		-- This allows Template:Navbox_subgroup to use {{#invoke:Navbox|navbox|border=...}}.
		args.border = frame.args.border
	end

	-- Read the arguments in the order they'll be output in, to make references number in the right order.
	local _
	_ = args.title
	_ = args.above
	for i = 1, 20 do
		_ = args["group" .. tostring(i)]
		_ = args["list" .. tostring(i)]
	end
	_ = args.below

	return p._navbox(args)
end

return p