local p = {} local data = mw.loadData( 'Module:Interlinear/data' ) local gloss_override = {} -- for custom gloss abbreviations local getArgs = require('Module:Arguments').getArgs local yesno = require('Module:Yesno') local lang_data = mw.loadData( 'Module:Lang/data' )  -- Almost-global variables  local glossing_type, displaying_messages, free_translation, msg, buffer  -- General settings  local conf = { --settings 	WordSeparator = " \n\r\t", -- Don't replace with %s as this would include non-breaking spaces 	GlossAbbrPattern = "^([Ø0-9A-Z]+)$", -- this isn't a full regex, but a Lua pattern 	-- NOTE: The following characters must be formatted for use in a pattern set. 	GlossAbbrBoundary = "-.,;:<>‹›/\\~+=%?%s%[%]()%_\127'", 	GlossExcludeTable = {I = true,}, --strings not be treated as glossing abbreviations 	GlossExcludePattern = '^[0-9][0-9]+$', -- excludes strings consisting entirely of digits 	GlossSmallCapsExclude = "^[AOPS]$", -- glossing abbreviations matching this pattern will not be rendered in small caps 	GlossingType = "label", -- if set to "label" gloss abbreviations are formatted as an <abbr> with the "label" appearing in a tooltip 						-- if set to "wikilink" the abbreviation is formatted as a wikilink to the relevant wikipedia article 						-- if set to "none" abbreviations aren't formatted at all 	ErrorCategory = "Category:Pages with errors in interlinear text", 	AmbiguousGlossCategory = "Category:Articles with ambiguous glossing abbreviations", 	MessageGlossingError = "Error(s) in interlinear glossing", 	combining_gender_numbers = "[0-9][0-9]?$", --e.g. G4 '4th gender' or CL7 'class 7' 	combining_gender_prefixes = {G = "gender", CL = "class"}, 	combining_person = {["1"] = "first person", ["2"] = "second person", ["3"] = "third person"}, 	combining_number = {S = "singular", SG = "singular", P = "plural", PL = "plural", D = "dual", DU = "dual", TRI = "trial"}, 	combining_gender = {F = "feminine", M = "masculine", N = "neuter"}, 	LowerCaseGlosses = {["1sg"] = true, ["2sg"] = true, ["3sg"] = true, ["1du"] = true, ["2du"] = true, ["3du"] = true, ["1pl"] = true, ["2pl"] = true, 		["3pl"] = true, ["Fsg"] = true, ["Fpl"] = true, ["Msg"] = true, ["Mpl"] = true,}, -- these are the non-all-upper-case strings that will be recognised as glossing abbreviations 	ErrorHelpLocation = "Template:Interlinear", }  -- CSS styles and classes  conf.style = { --CSS styles 	WordDiv = "float: left; margin-bottom: 0.3em;", 	WordMargin = "margin-right: 1em;", 	WordP = "margin: 0px;", -- the style for the word <p> elements 	GlossAbbr = "font-variant: small-caps; font-variant-numeric: oldstyle-nums; text-transform: lowercase; ", -- won't be applied to gloss abbreviations containing lower-case characters 	HiddenText = "display: none;", 	EndDiv = "clear: left; display: block;", -- style of the <div> element at the end of the interlinear display 	ErrorMessage = "font-size: inherit", } conf.class = { --CSS classes 	Interlinear = "interlinear", 	GlossAbbr  = "gloss-abbr", 	GlossAbbrAmb = "gloss-abbr-ambiguous", 	GlossAbbrError = "gloss-abbr-error", 	ErrorMessage = "error", }  -- Section transclusion  local page_content = nil -- lazy initilization local function get_section(frame, section_name) 	if page_content == nil then 		local current_title = mw.title.getCurrentTitle() 		page_content = current_title:getContent() 	end 	if page_content then 		if mw.ustring.find(page_content, section_name, 1, true) then 			return frame:preprocess('') 		end 	end 	return end  -- Sundry small functions  local function normalise(str) 	return mw.ustring.gsub(str,"[" .. conf.WordSeparator .. "]+"," ") end  local function tidyCss(str) 	str = mw.ustring.gsub(str, '^[\"\']*(.-)[\"\']*$', "%1") -- trims quotation marks 	if mw.ustring.sub(str, -1) ~= ";" then str = str .. ";" end -- appends ";" if missing 	return str end  local function highlight(text) 	if text then 		return '' .. text .. '' 	else return "" end end  local function tone_sup(str) 	return mw.ustring.gsub(str, "([^%p%s0-9])([0-9]+)", "%1%2") end  local function is_empty(str) -- returns "false" if its argument is a string containing chars other than spaces &c. 	if not str then return true end 	if mw.ustring.find(str, "[^" .. conf.WordSeparator .. "]") 		then return false 	else return true end end  local function help_link (anchor) 	if anchor then 		return " (help)" 	else return "" end end  -- the following is part of a trial implementation of automatic transliteration: local function transliterate (str, lang_from, lang_to,  scheme) 	local lookup = {grc = {module = 'Module:Ancient Greek', funct = "transliterate", } } 	if not lang_from then 		msg:add("error", "Source language for transliteration is not set") 	else 		local t = lookup[lang_from] 		if t then 			local module = require(t.module) 			return module[t.funct](str) 		else msg:add("error", "Can't find transliterator for language '" .. lang_from .. "'") 		end 	end 	return "" end -- end of trial block  -- The following two functions update the glossing settings based on the received -- template arguments. set_global_glossing_settings() updates the global settings -- that are valid for all gloss abbreviations. set_glossing_type() -- returns the glossing type, which can vary between the different lines.  local function set_global_glossing_settings(a) 	local style = "" 	if a.style then style = tidyCss(a.style) end 	if a.underline == "no" then 		style = style .. "text-decoration: none;" end 	if a.small_caps == "no" then 		style = style .. "font-variant:normal; text-transform: none;" end 	if style ~= "" then conf.style.GlossAbbr = conf.style.GlossAbbr .. style end end  local function set_glossing_type(glossing) 	if glossing then 		local GlossingType 		glossing = mw.ustring.lower(mw.text.trim(glossing)) 		if mw.ustring.find(glossing, 'link') then 			GlossingType = "wikilink" 		elseif mw.ustring.find(glossing, 'label') 			or  mw.ustring.find(glossing, 'no link') then 			GlossingType = 'label' 		elseif mw.ustring.find(glossing, 'no abbr') then 			GlossingType = "no abbr" 		elseif yesno(glossing) == false then 			GlossingType = nil 		elseif yesno(glossing) then 			GlossingType = conf.GlossingType 		else 			msg:add('error', 'Glossing type "' .. glossing .. '" not recognised') end 		return GlossingType 	else error("set_glossing_type: 'glossing' is nil or false", 2) 	end end  local function set_custom_glosses(list) 	local abbs = mw.text.split(list, '[;\n\t]') 	for _,v in pairs(abbs) do 		local gloss = mw.text.split(v, ':') 		local a = mw.text.trim(gloss[1]) 		if a and a ~= "" then 			gloss_override[a] = {} 			gloss_override[a].expansion = gloss[2] 			gloss_override[a].wikipage = gloss[3] 		end 	end end  -- The UserMessages object contains and processes error messages and warnings  local UserMessages = {errors = {}, warnings = {}, gloss_messages = {}} function UserMessages:add(msgtype, text, gloss) 	if msgtype == "gloss_message" then 		self.gloss_messages[gloss] = text 	elseif msgtype == "warning" then 		table.insert(self.warnings, text) 	elseif msgtype == "non-repeating error" then 		self.errors.nre = text 	elseif msgtype == "ambiguous gloss" then 		self.if_ambiguous_glosses = true 	elseif msgtype == "error" then 		table.insert(self.errors, text) 	else return error("UserMessages:add(): unknown message type", 2) 	end end function UserMessages:print_errors() 	local out = "" 	local namespace = mw.title.getCurrentTitle().namespace 	if next(self.errors) or self.warnings[1] then 		local err_span = mw.html.create("span") 		err_span:attr("style", conf.style.ErrorMessage) 		err_span:addClass(conf.class.ErrorMessage) 		for _,v in pairs(self.errors) do 			err_span:wikitext(" " .. v .. ";") end 		if namespace % 2 == 0 and namespace ~= 2 -- non-talk namespaces, excluding user pages; if modifying please update the description on the category page 			then err_span:wikitext(conf.ErrorCategory) 		end 		out = tostring(err_span) 		mw.addWarning(conf.MessageGlossingError) 	end 	if self.if_ambiguous_glosses then 		if namespace == 0 -- article namespace 			then out = out .. conf.AmbiguousGlossCategory -- this category will only track articles 		end 	end 	return out end function UserMessages:print_warnings() 	local out = "" 	-- Messages and warnings get displayed only if the page is being viewed in "preview" mode: 	if displaying_messages and (next(self.gloss_messages) or next(self.warnings)) then 		local div = mw.html.create("div") 		div:addClass("interlinear-preview-warning") 			:cssText('border: 1px solid #a2a9b1; background-color: #f8f9fa; width: 80%; padding: 0.2em;') 			:wikitext("This message box is shown only in preview:") 			:newline() 		for _,v in ipairs(self.warnings) do 			local p = div:tag("p") 			p:addClass(conf.class.ErrorMessage) 			p:attr("style", conf.style.ErrorMessage) 			p:wikitext(v) 		end 		if self.gloss_messages then 			div:wikitext("  To change any of the following default expansions, see the template's documentation:") 			end 		for _,v in pairs(self.gloss_messages) do 			div:wikitext("" .. v .. "") 		end 		out = out .. "\n\n" .. tostring(div) 	end 	return out end  -- gloss_lookup() receives a gloss abbreviation and tries to uncover its meaning.  local function gloss_lookup(a, label, wikilink) 	local _label, _wikilink, _lookup, source = nil, nil, nil, nil 	if gloss_override[a] then 		_lookup = gloss_override[a] 		source = "local" 	elseif data.abbreviations[a] then _lookup = data.abbreviations[a] end 	if _lookup and _lookup.expansion ~= "" then 		_label, _wikilink = _lookup.expansion, _lookup.wikipage 	else 		local prefix = mw.ustring.sub(a,1,1) 		local suffix = mw.ustring.sub(a,2) 		if conf.combining_person[prefix] then -- is it of the form 1PL or 3FS? 			_label = conf.combining_person[prefix] 		local _suffix = conf.combining_number[suffix] or conf.combining_gender[suffix] 			if _suffix then 				_label = _label .. ", " .. _suffix 			else 				local suffix1 = mw.ustring.sub(suffix,1,1) 				local suffix2 = mw.ustring.sub(suffix,2) 					if conf.combining_gender[suffix1] 					and  conf.combining_number[suffix2] then 						_label = _label .. ", " .. conf.combining_gender[suffix1] .. ", " .. conf.combining_number[suffix2] 					else _label = nil end 			end 	elseif mw.ustring.match(suffix,conf.combining_gender_numbers) then -- cases like G4 = gender 4 		local _i,_j = mw.ustring.find(a, conf.combining_gender_numbers) 		local _pre = mw.ustring.sub(a, 1, _i - 1) 		local _suff = mw.ustring.sub(a, _i) 		if conf.combining_gender_prefixes[_pre] then 			_label = conf.combining_gender_prefixes[_pre] .. " " .. _suff 		end 	elseif prefix == "N" then -- dealing with cases like NPST = non-past 		local s = gloss_override[suffix] or data.abbreviations[suffix] 			if s ~= nil and not s.ExcludeNegation then 				_label = "non-" .. s.expansion 				_wikilink = s.wikipage 			end 			s = nil 		end 	end 	if _label == "" then _label = nil end 	if _wikilink == "" then _wikilink = nil end 	if not label then label = _label end 	if not wikilink then wikilink = _wikilink end 	return label, wikilink, source end  -- format_gloss() calls gloss_lookup() to find the meaning of a gloss -- abbreviation, which it then proceeds to format  local function format_gloss(gloss, label, wikilink) 	if string.sub(gloss,1,3) == "000" then -- checks for a common component of exposed strip markers (see :mw:Strip marker) 		return gloss 	end 	local gloss2 = mw.ustring.gsub(gloss,"<.->","") -- remove any html fluff 	gloss2 = mw.ustring.gsub(gloss2, "%'%'+", "") -- remove wiki bold/italic formatting 	gloss2 = mw.text.trim(mw.ustring.upper(gloss2)) 	if not (label or wikilink) 		or (not label and glossing_type == "label") 		or (not wikilink  and glossing_type == "wikilink") 		then 			if glossing_type ~= "no abbr" 				then label, wikilink, source = gloss_lookup(gloss2, label, wikilink) 			end 	end 	local gloss_node 	if glossing_type == "no abbr" 		then gloss_node = mw.html.create("span") 	else gloss_node = mw.html.create("abbr") end 	gloss_node:addClass(conf.class.GlossAbbr) 	if label or wikilink then 		if not mw.ustring.match(gloss, "%l") -- excluding glosses that contain lower-case characters 			and not mw.ustring.match(gloss,conf.GlossSmallCapsExclude) -- and also excluding A, O etc. from rendering in small caps 			then gloss_node:attr("style", conf.style.GlossAbbr) 		end 		local abbr_label 		if label then abbr_label = label 			else abbr_label = wikilink end 		gloss_node:attr("title", abbr_label) 		if source ~= "local" and data.abbreviations[gloss2] then 			if data.abbreviations[gloss2].ambiguous then 				gloss_node:addClass(conf.class.GlossAbbrAmb) 					msg:add("ambiguous gloss") 				end 		end 		if glossing_type == "wikilink" and wikilink 			then gloss_node:wikitext("" , gloss, "") 			else gloss_node:wikitext(gloss) end 		if source ~= "local" and displaying_messages then -- logging gloss lookups: 			local message = "" 			if label then 				message = "assuming " .. gloss2 .. " means \"" .. abbr_label .. "\";" end 			if glossing_type == "wikilink" and wikilink then 				message = message .. " linking to " .. wikilink .. ";" 			end 			msg:add("gloss_message", message, gloss) 		end 	elseif glossing_type == "no abbr" 		then gloss_node 				:attr("style", conf.style.GlossAbbr) 				:wikitext(gloss) 	else 		if displaying_messages then 			msg:add("warning", "Gloss abbreviation " .. highlight(gloss2) .. "  not recognised" .. help_link("gloss abbr")) 		end 		msg:add("non-repeating error", "Unknown glossing abbreviation(s)" .. help_link("gloss abbr")) 		gloss_node 			:addClass(conf.class.GlossAbbrError) 			:addClass("error") 			:css("font-size", "100%") 			:attr("title", gloss2 .. ": glossing abbreviation not found") 			:attr("style", conf.style.ErrorMessage) 			:wikitext(gloss) 	end 	return tostring(gloss_node) end  -- find_gloss() parses a word into morphemes, and it calls format_gloss() -- for anything that looks like a glossing abbreviation.  local function find_gloss(word) 	local function scan_gloss(boundary, gloss_abbr) -- checks a morpheme if it is a gloss abbreviation 		if (mw.ustring.match(gloss_abbr, conf.GlossAbbrPattern) 			or conf.LowerCaseGlosses[gloss_abbr]) 			and not (conf.GlossExcludeTable[gloss_abbr] 				or mw.ustring.match(gloss_abbr, conf.GlossExcludePattern)) 			then gloss_abbr = format_gloss(gloss_abbr) 		end 		return boundary .. gloss_abbr 	end 	local word = mw.text.decode(word, true) 	if word == "I" -- for the case of the English word "I", the 1SG pronoun 		then return word end 	local pattern = "([" .. conf.GlossAbbrBoundary .. "]?)([^" .. conf.GlossAbbrBoundary .. "]+)" 	word = mw.ustring.gsub(word, pattern, scan_gloss) -- splits into morphemes 	return word end  -- The main purpose of the bletcherous parse() is to split a line into words and and then for each eligible word -- to call find_gloss(). The parser outputs the individual words (with any gloss abbreviation formatting applied). -- The simple job of splitting at whitespaces has been made complicated by a) the fact that the input can contain -- whitespaces inside the various html elements that are the result of the application of various formatting templates; -- and b) the need to be able to recognise the output of the template that formats custom gloss abbreviations -- (and hence skip passing it on to find_gloss). See talk for a suggestion about its future.  local function parse(cline, i, tags_found,ifglossing)  	local function issue_error(message, culprit) 		UserMessages:add("error",  message .. ": " .. mw.ustring.sub(cline.whole, 1, i-1) .. "" .. culprit  .. "") 	end 	if i > cline.length then return i end --this will only be triggered if the current line has less words than line 1 	local next_step, j, _, chunk 	local probe = mw.ustring.sub(cline.whole,i,i) 	if mw.ustring.match(probe,"[" .. conf.WordSeparator .. "]") and tags_found == 0 		then next_step =  i-1 	elseif probe == "[" then --Wikilink? 		if mw.ustring.sub(cline.whole,i+1,i+1) == "[" then 			_,j,chunk = mw.ustring.find(cline.whole,"(%[%[.-%]%])", i) 		else chunk = "["; j = i end --not a wikilink then 		buffer = buffer .. chunk 		next_step =  parse(cline, j+1,tags_found,ifglossing) 	elseif probe == "{"  and tags_found == 0 then --curly brackets enclose a sequence of words to be treated as a single unit 		_,j,chunk = mw.ustring.find(cline.whole,"(.-)(})", i+1) 		if not chunk then 			issue_error("Unclosed curly bracket", "{") 			chunk = highlight("{"); j = i 		elseif ifglossing==true then 			chunk = find_gloss(chunk) 		else 			if cline.tone_sup then chunk = tone_sup(chunk) end 		end 		buffer = buffer .. chunk 		next_step =  parse(cline, j+1,tags_found,ifglossing) 	elseif probe == "<" then -- We've encountered an HTML tag. What do we do now? 		local _,j,chunk = mw.ustring.find(cline.whole,"(<.->)",i) 		if not chunk then 			issue_error("Unclosed angle bracket", "<") 			chunk = highlight("<"); j = i 		elseif mw.ustring.sub(cline.whole,i,i+1) == "</" then -- It's a CLOSING tag 			if cline.glossing 				and ifglossing==false 				and mw.ustring.match(chunk,"</abbr>") 				then ifglossing=true end 			tags_found = tags_found - 1 		elseif not mw.ustring.match(chunk, "/>$") -- It's an OPENING tag, unless it opens a self-closing element (in which case the element is ignored) 			then if ifglossing == true -- the following checks for the output of : 					and mw.ustring.find(chunk, conf.class.GlossAbbr, 1, true) -- it's important that the "find" function uses literal strings and not patterns 						then ifglossing = false end 			tags_found = tags_found + 1 		end 		buffer = buffer .. chunk 		next_step = parse(cline, j+1,tags_found,ifglossing) 	else -- No HTML tags, so we only need to find where the word ends 		local _,k,chunk = mw.ustring.find(cline.whole,"(..-)([ <[])",i) 		if k then --ordinary text 			if ifglossing==true then 				buffer = buffer .. find_gloss(chunk) 			else 				if cline.tone_sup then chunk = tone_sup(chunk) end 				buffer = buffer .. chunk 			end 			next_step = parse(cline, k, tags_found, ifglossing) 		else -- reached end of string 			if ifglossing == true then 				chunk = find_gloss(mw.ustring.sub(cline.whole,i)) 			else 				chunk = mw.ustring.sub(cline.whole,i) 				if cline.tone_sup then chunk = tone_sup(chunk) end 			end 			buffer = buffer .. chunk 			next_step = cline.length 		end 	end 	return next_step end  -- The following function is called by Template:gcl and is used for formatting an individual glossing abbreviation  function p.gcl(frame) 	local args = getArgs(frame,{ 		trim = true, 		removeBlanks = false, 		parentOnly = true, 		wrappers = {'Template:Gcl'}, 	}) 	msg = UserMessages 	set_global_glossing_settings{style = args.style, underline = args.underline, small_caps = args['small-caps']} 	if not args.glossing then 		glossing_type = conf.GlossingType -- a global variable 	else glossing_type = set_glossing_type(args.glossing) 	end 	local gloss, label, wikilink = args[1], args[2], args[3] 	if not gloss then UserMessages:add("error", "No gloss supplied") 		return UserMessages:print() end 	if wikilink and not args.glossing then -- if a wikilink is supplied and glossing isn't set to 'label'... 		glossing_type = 'wikilink' end --     .. then the wikilink will be formatted as such 	if label == "" then label = nil end 	if wikilink == "" then wikilink = nil end 	local result = format_gloss(gloss, label, wikilink) 	return result end  -- The following is the function called by Template:Interlinear. -- It processes the template arguments, then calls parse() to split the input lines into words -- and it then builds the output html.  function p.interlinearise(frame)  -- Prepare arguments  	local if_auto_translit = false 	local args = getArgs(frame, { -- configuration for Module:Arguments 		trim = true, 		removeBlanks = false, 		parentFirst = true, 		wrappers = {'Template:Interlinear', 'Template:Fs interlinear'}, 	}) 	local template_name = frame:getParent():getTitle() 	if template_name == 'Template:Fs interlinear' then 		args.italics1 = args.italics1 or "no" 		args.italics2 = args.italics2 or "yes" 		args.glossing3 = args.glossing3 or "yes" 		if args.lang and not args.lang2 then args.lang2 = args.lang .."-Latn" end 		if args.transl and not args.transl2 then args.transl2 = args.transl end 		if_auto_translit = true  	end 	local revid = frame:preprocess( "" ) 	if  revid == "" then 		if not args['display-messages'] or yesno(args['display-messages']) then 		displaying_messages = true end-- messages will be displayed only in preview mode 	end 	msg = UserMessages 	local line = {}  	local function set_italics(n) 		line[n].attr.style = line[n].attr.style .. "font-style: italic;" 		line[n].tone_sup = true -- single digits are assumed to be tone markers and will hence be superscripted 		if args['tone-superscripting'] and not yesno(args['tone-superscripting']) 			then line[n].tone_sup = false end 	end  	if args.glossing then -- the glossing= parameter sets the default glossing type 		local _gl = set_glossing_type(args.glossing) 		if _gl then conf.GlossingType = _gl end 	end 	--this looks for a list of glossing abbreviations on the page that transcludes the template: 	local _ablist_section = get_section(frame, 'list-of-glossing-abbreviations') 	if _ablist_section and _ablist_section ~= "" then 		local _a = mw.ustring.gsub(_ablist_section, '</?div [^\n]*>', ) -- strips off the div tags 		set_custom_glosses(_a) 	end 	--and this looks looks for a list of abbreviations set within the template: 	local _ablist = args.abbreviations 	if _ablist and _ablist ~= "" 		then set_custom_glosses(_ablist) end 	local _ablist = args.ablist 	if _ablist and _ablist ~= "" 		then set_custom_glosses(_ablist) end  	local _spacing = tonumber(args.spacing) 	if _spacing and _spacing <= 20 		then conf.style.WordDiv = conf.style.WordDiv .. 'margin-right: ' .. _spacing .. 'em;' 	else conf.style.WordDiv = conf.style.WordDiv .. conf.style.WordMargin 	end  	local offset, last_line = 0, 0 	for j,v in ipairs(args) do -- iterates over the unnamed parameters from the template 		last_line = last_line +1 		if is_empty(v) 			then offset = offset + 1 		else 		local i = j - offset 		line[i] = {} 		v = normalise(v)  		-- the following is part of a trial implementation of automatic transliteration: 		if if_auto_translit and v == "auto" and i > 1 then 			local source_line = line[i-1] 			local src_lang = source_line.lang 			if not src_lang then src_lang = args.lang end 			if src_lang then 					v = transliterate(source_line.whole, src_lang) 			else v = ""; msg:add("error", "No language specified for automatic transliteration") 			end 		end  -- end of trial block  		line[i].whole = v 		line[i].length = mw.ustring.len(v)  		local _c = args["c" .. i] 		if _c and _c ~= "" then 			line.hasComments = true 			line[i].c = _c 		end  		---prepare style arguments---- 		line[i].class = "" 		local _style = args["style" .. i] 		if not _style then _style = "" 		else _style = tidyCss(_style) end 		--line[i].attr holds the attributes for the <p> elements that enclose the words in line i 		line[i].attr = {style = conf.style.WordP .. _style}  		local _lang = args["lang" .. i] 		if _lang and #_lang > 1 then 			line[i].lang = _lang 		else _lang = args.lang 			if _lang and #_lang > 1 and i == 1 then -- if a lang= parameter is supplied, it's assumed to apply to line 1 				line[i].lang = _lang 			end 		end 		line[i].attr.lang = line[i].lang 		--the following emulates the behaviour of  (see Template talk:Fs interlinear#Tibetan): 		if template_name == 'Template:Fs interlinear' then 			if _lang == "bo" and i == 1 then 				line[1].class = line[1].class .. " uchen" 				line[1].attr.style = line[1].attr.style .. "font-size:1.25em; word-wrap:break-word;" 			end 		end  		if yesno(args["italics" .. i]) then 			set_italics(i) 		end  		local _transl = args["transl" .. i] 		if _transl and #_transl > 1 then 			_transl = mw.ustring.lower(_transl) 			local _lookup = lang_data.translit_title_table[_transl] 			if _lookup then 				if _lang and  _lookup[_lang] then 					_transl = _lookup[_lang] 				else _transl = _lookup.default 				end 				if _transl then 					line[i].attr.title = _transl 				end 			else  msg:add("error", "Transliteration scheme '" .. _transl .. "' not recognised") 			end 		end  		local _glossing = args["glossing" .. i] 		if _glossing then 			line[i].glossing = set_glossing_type(_glossing) 			-- Do not treat default glossing settings as custom. 			if not ((i == 1 and not yesno(_glossing)) or (i == 2 and yesno(_glossing))) then 				line.HasCustomGlossing = true 			end 		end  		local _ipa = args['ipa' .. i] 		if yesno(_ipa) then 			line[i].class = "IPA" 		end  		local _class = args['class' .. i] 		if _class then 			line[i].class = line[i].class .. " " .. _class 		end  		if line[i].class == "" 			then line[i].class = nil end 		end -- ends the first if-statement in the loop 	end -- ends the FOR cycle  	local line_count = #line 	if line_count == 0 then 		msg:add("error", template_name .. ": no lines supplied.") 		return msg:print_errors() 	end  	if line_count > 1 then 		local _italics = args.italics 		local n = tonumber(_italics) 		if n and n > 0 then 			set_italics(n) 		elseif not (_italics and not yesno(_italics)) and not (args["italics1"] and not yesno(args["italics1"])) then 			set_italics(1) -- by default, the first line will get italicised, unless italics=no or italics1=no 		end 		-- the last unnamed parameter is assumed to be the free translation: 		free_translation = args[last_line] 		if not is_empty(free_translation) then 			line [line_count] = nil   end  --... and is thus excluded from interlinearising 	end  -- If glossing isn't specified for any line, then it's chosen by default to occur -- in the second line, unless only a single line has been supplied, in which case -- the assumption is that it is the one containing grammatical glosses 	if yesno(args.glossing) == false then 		line.HasCustomGlossing = true 	end 	if not line.HasCustomGlossing then 		if line_count == 1 then 			line[1].glossing = conf.GlossingType 		elseif line[2] then 			line[2].glossing = conf.GlossingType 		end 	end 	set_global_glossing_settings{style = args['glossing-style'], underline = args.underline, small_caps = args['small-caps']}  -- Segment lines into words  	for i,v in ipairs(line) do 		local ifglossing = false 		if line[i].glossing then 			ifglossing = true -- if true the parser will attempt to format gloss abbreviations in the current line 			glossing_type = line[i].glossing -- neccessarily a global variable 		end 		local wc, n = 1, 1 		line[i].words = {} 		while n <= line[i].length do 			buffer = "" 			n = parse(line[i], n, 0, ifglossing)+2 			line[i].words[wc] = buffer 			wc = wc + 1 		end 	end  	----Check for mismatches in number of words across lines---- 	local number_of_words, mismatch_found = 0, false 	for i,v in ipairs(line) do -- find the maximum number of words in any line 		local wc = #line[i].words 		if wc ~= number_of_words then 			if i ~= 1 and wc ~= 0 then 				mismatch_found = true 			end 			if wc > number_of_words then 				number_of_words = wc 			end 		end 	end 	----Deal with mismatches--- 	if mismatch_found then 		local error_text = "Mismatch in the number of words between lines: " 		for i,v in ipairs(line) do 			local wc = #line[i].words 			error_text = error_text .. wc .. " word(s) in line " .. i .. ", " 			if wc ~= number_of_words then 				for current_word = wc+1, number_of_words do 					line[i].words[current_word] = " " 				end 			end 		end 		if string.sub(error_text, -2) == ", " 			then error_text = string.sub(error_text, 1, #error_text - 2) .. " " 		end 		error_text = error_text .. help_link("mismatch") 		UserMessages:add("error", error_text) 	end  -- Build the HTML  	---- If just a single line was supplied, format it as inline text 	if line_count == 1 then 		local span = mw.html.create('span') 		span:attr(line[1].attr) 		for wi = 1, number_of_words do 			local space 			if wi < number_of_words then space = " " else space = "" end 			span:wikitext(line[1].words[wi] .. space) 		end 		return tostring(span) 	end  	---- More than one line supplied, so we'll produce interlinear display 	local div = mw.html.create("div") 	div:addClass(conf.class.Interlinear)  	-- For stuff to be displayed in the left margin, like example numbering 	local number, indent = nil, nil 	if args.number and args.number ~= "" 		then number = args.number end 	if args.indent and args.indent ~="" 		then indent = args.indent end 	if indent or number then 		if not indent then indent = "4" end --default value 		div:css("margin-left", indent .. 'em') 		if number then 			div:tag("div") 				:css("position", "absolute") 				:css("left", "1em") 				:wikitext(args.number) 		end 	end  	if args.box and args.box ~= "" then 		div:css("background-color", "#f8f9fa") 			:css("border", "1px solid #eaecf0") 			:css("padding", "1em") end 	if args.top and args.top ~= "" then --lines to display above the interlinear block 		div:tag("div") 			:wikitext(args.top) 	end  	-- Producing the interlinear block 	for wi = 1, number_of_words do 		local div2 = div:tag("div") 					:attr("style", conf.style.WordDiv) 		for i,_ in ipairs (line) do 			if line[i].whole ~= "" then -- skipping empty lines 				local p = div2:tag("p") 				p:attr(line[i].attr) 				if line[i].class then 					p:addClass(line[i].class) 				end 				local _text = line[i].words[wi] 				if _text == "" or _text == " " 					then _text = " " end -- <p> elements without content mess up the interlinear display 				p:wikitext(_text) 			end 		end 	end  	--- If any "comments" have been specified, add them at the end of each line 	if line.hasComments then 		local divc = div:tag("div") 					:attr("style", conf.style.WordDiv) 		for i,_ in ipairs (line) do 			local p = divc:tag("p") 			p:attr("style", conf.style.WordP) 			if line[i].c then 				p:wikitext(line[i].c) 			else p:wikitext(" ") 			end 		end 	end  	--Add hidden lines containing the content of each line of interlinear text: this is for accessibility 	for i,v in ipairs(line) do 		local hidden_line = div:tag("p") 		hidden_line:attr("style", conf.style.HiddenText) 					:wikitext(v.whole) 	end  	-- Format the free translation 	local ft_line = div:tag("p") 	if free_translation and free_translation ~= "" then 		ft_line:attr("style", "clear: left;") 		ft_line:wikitext(free_translation) 	end 	if args.bottom and args.bottom ~= "" 		then local bottom = div:tag('p') 		bottom:css('margin-top', '0') 		bottom:wikitext(args.bottom) 	end 	ft_line:node(msg:print_errors()) -- for error messages  	local end_div = div:tag("div") 		end_div:attr("style", conf.style.EndDiv) 	div:newline() 	local temp_track = "" 	if last_line == 2 		then temp_track = "Category:Pages with interlinear glosses using two unnamed parameters" 	end 	if last_line > 3 and template_name ~= 'Template:Fs interlinear' 		then  temp_track = "Category:Pages with interlinear glosses using more than three unnamed parameters" 	end 	return tostring(div) .. temp_track .. msg:print_warnings() end  return p