Module:Navbox

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

local p = {}
local getArgs -- lazily initialized
local args
local format = string.format

local function get_title_arg(is_collapsible, template)
	local title_arg = 1
	if is_collapsible then title_arg = 2 end
	if template then title_arg = 'template' end
	return title_arg
end

local function add_link(link_description, ul, is_mini)
	local l
	if link_description.url then
		l = {'[', '', ']'}
	else
		l = {'[[', '|', ']]'}
	end
	ul:tag('li')
		:addClass('nv-' .. link_description.full)
		:wikitext(l[1] .. link_description.link .. l[2])
		:tag(is_mini and 'abbr' or 'span')
			:attr('title', link_description.html_title)
			:wikitext(is_mini and link_description.mini or link_description.full)
			:done()
		:wikitext(l[3])
		:done()
end

local function make_list(title_text, has_brackets, is_mini)
	local title = mw.title.new(mw.text.trim(title_text), 'Template')
	if not title then
		error('Invalid title ' .. title_text)
	end
	local talkpage = title.talkPageTitle and title.talkPageTitle.fullText or ''
	
	local link_descriptions = {
		{ ['mini'] = 'v', ['full'] = 'view', ['html_title'] = 'View this template',
			['link'] = title.fullText, ['url'] = false },
		{ ['mini'] = 'e', ['full'] = 'edit', ['html_title'] = 'Edit this template',
			['link'] = title:fullUrl('action=edit'), ['url'] = true },
		{ ['mini'] = 'h', ['full'] = 'hist', ['html_title'] = 'History of this template',
			['link'] = title:fullUrl('action=history'), ['url'] = true },
	}

	local ul = mw.html.create('ul')
	if has_brackets then
		ul:addClass('navbar-brackets')
	end
	
	for _, description in ipairs(link_descriptions) do
		add_link(description, ul, is_mini)
	end
	return ul:done()
	
end

local function navbar(args)
	local is_collapsible = args.collapsible
	local is_mini = args.mini
	local is_plain = args.plain
	
	local collapsible_class = nil
	if is_collapsible then
		collapsible_class = 'navbar-collapse'
		if not is_plain then is_mini = 1 end
	end
	
	local div = mw.html.create():tag('div')
	div
		:addClass('navbar')
		:addClass('plainlinks')
		:addClass('hlist')
		:addClass(collapsible_class) -- we made the determination earlier

	if is_mini then div:addClass('navbar-mini') end

	local box_text = (args.text or 'This box: ') .. ' '
	 -- the concatenated space guarantees the box text is separated
	if not (is_mini or is_plain) then
		div
			:tag('span')
				:addClass('navbar-boxtext')
				:wikitext(box_text)
	end
	
	local template = args.template
	local has_brackets = args.brackets
	local title_arg = get_title_arg(is_collapsible, template)
	local title_text = args[title_arg] or (':' .. mw.getCurrentFrame():getParent():getTitle())
	local list = make_list(title_text, has_brackets, is_mini)
	div:node(list)

	if is_collapsible then
		local title_text_class
		if is_mini then
			title_text_class = 'navbar-ct-mini'
		else
			title_text_class = 'navbar-ct-full'
		end
		div:done()
			:tag('div')
			:addClass(title_text_class)
			:wikitext(args[1])
	end
	
	return tostring(div:done())
end

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.
	if border == 'subgroup' and args['orphan'] ~= 'yes' then
		-- No change; striping occurs in outermost navbox.
		return wikitext
	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
	return (wikitext:gsub('\127_ODDEVEN(%d?)_\127', 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 = format('%s<span class="nowrap">%s</span>', 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

-- we will want this later when we want to add tstyles for hlist/plainlist
local function has_navbar()
	return args['navbar'] ~= 'off'
		and args['navbar'] ~= 'plain'
		and (
			args['name']
			or mw.getCurrentFrame():getParent():getTitle():gsub('/sandbox$', '')
				~= 'Template:Navbox'
		)
end

local function renderNavBar(titleCell)
	if has_navbar() then
		titleCell:wikitext(navbar{
			[1] = args['name'],
			['mini'] = 1,
		})
	end

end

local function renderTitleRow(tbl)
	if not args['title'] then return end

	local titleRow = tbl:tag('tr')

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

	local titleColspan = 2
	if args['imageleft'] then titleColspan = titleColspan + 1 end
	if args['image'] then titleColspan = titleColspan + 1 end

	titleCell
		:addClass('navbox-title')
		:attr('colspan', titleColspan)

	renderNavBar(titleCell)

	titleCell
		:tag('div')
			-- id for aria-labelledby attribute
			:attr('id', mw.uri.anchorEncode(args['title']))
			:addClass('navbox-title-text')
			:wikitext(processItem(args['title']))
		
	tbl:tag('tr')
		:addClass('navbox-spacer')
end

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')
			: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']))
	
	tbl:tag('tr')
		:addClass('navbox-spacer')
end

local function renderBelowRow(tbl)
	if not args['below'] then return end
	
	tbl:tag('tr')
		:addClass('navbox-spacer')
		
	tbl:tag('tr')
		:tag('td')
			:addClass('navbox-abovebelow')
			:attr('colspan', getAboveBelowColspan())
			:tag('div')
				:wikitext(processItem(args['below'], args['nowrapitems']))
end

local function renderListRow(tbl, index, listnum, listnums_size)
	if index > 1 then
		tbl:tag('tr')
			:addClass('navbox-spacer')
	end
	
	local row = tbl:tag('tr')

	if index == 1 and args['imageleft'] then
		row
			:tag('td')
				:addClass('noviewer')
				:addClass('navbox-image')
				:css('width', '1px')               -- Minimize width
				:css('padding', '0 2px 0 0')
				:attr('rowspan', listnums_size)
				:tag('div')
					:wikitext(processItem(args['imageleft']))
	end

	local group_and_num = format('group%d', 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['title'] or args['above'] or args['group2']) then
			groupCell
				:attr('id', mw.uri.anchorEncode(args['group1']))
		end

		groupCell
			:attr('scope', 'row')
			:addClass('navbox-group')

		groupCell
			:wikitext(args[group_and_num])
	end

	local listCell = row:tag('td')

	if args[group_and_num] then
		listCell
			:addClass('navbox-list-with-group')
	else
		listCell:attr('colspan', 2)
	end

	local list_and_num = format('list%d', listnum)
	local listText = args[list_and_num]
	local oddEven = '\127_ODDEVEN_\127'
	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 '\127_ODDEVEN0_\127' or 'odd'
	end

	local listclass_and_num = format('list%dclass', listnum)
	listCell
		:css('padding', '0')
		:addClass('navbox-list')
		:addClass('navbox-' .. oddEven)
		:addClass(args['listclass'])
		:addClass(args[listclass_and_num])
		:tag('div')
			:wikitext(processItem(listText, args['nowrapitems']))

	if index == 1 and args['image'] then
		row
			:tag('td')
				:addClass('noviewer')
				:addClass('navbox-image')
				:css('width', '1px')               -- Minimize width
				:css('padding', '0 0 0 2px')
				:attr('rowspan', listnums_size)
				:tag('div')
					:wikitext(processItem(args['image']))
	end
end


local function renderMainTable(border, listnums)
	local tbl = mw.html.create('table')
		:addClass('nowraplinks')

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

	if border == 'subgroup' or border == 'none' then
		tbl
			:addClass('navbox-subgroup')
	else  -- regular navbox
		tbl
			:addClass('navbox-inner')
	end

	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

function p._navbox(navboxArgs)
	args = navboxArgs
	local 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)

	local 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(border, listnums)

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

	if border == 'none' then
		local nav = res:tag('div')
			:attr('role', 'navigation')
			: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>')
			:node(tbl)
			:wikitext('<div>')
	else
		local nav = res:tag('div')
			:attr('role', 'navigation')
			:addClass('navbox')
			:addClass(args['class'])
			: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

	return striped(tostring(res), border)
end

function p.navbox(frame)
	if not getArgs then
		getArgs = require('Module:Arguments').getArgs
	end
	args = getArgs(frame, {wrappers = {'Template:Navbox'}})

	-- Read the arguments in the order they'll be output in, to make references
	-- number in the right order.
	local _
	_ = args['title']
	_ = args['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[format('group%d', i)]
		_ = args[format('list%d', i)]
	end
	_ = args['below']

	return p._navbox(args)
end

return p
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