require('strict') local p = {} local navbar = require('Module:Navbar')._navbar local cfg = mw.loadData('মডিউল:Navbox/কনফিগারেশন') local getArgs -- lazily initialized local args local format = string.format  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 		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] 	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('বিষয়শ্রেণী:' .. 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  function p._navbox(navboxArgs) 	args = navboxArgs 	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  to balance out the parent's  		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) 	if not getArgs then 		getArgs = require('Module:Arguments').getArgs 	end 	args = getArgs(frame, {wrappers = {cfg.pattern.navbox}})  	-- Read the arguments in the order they'll be output in, to make references 	-- number in the right order. 	local _ 	_ = args[cfg.arg.title] 	_ = args[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[format(cfg.arg.group_and_num, i)] 		_ = args[format(cfg.arg.list_and_num, i)] 	end 	_ = args[cfg.arg.below]  	return p._navbox(args) end  return p