Mô đun:Lang

--[=[Lua support for the {{lang}}, {{lang-xx}}, and {{transl}} templates and replacement of various supporting templates. ]=]require('Mô đun:No globals');local p = {};local initial_style_state;-- set by lang_xx_inherit() and lang_xx_italic()local getArgs = require ('Mô đun:Arguments').getArgs;local lang_name_table = mw.loadData ('Mô đun:Language/name/data');local synonym_table = mw.loadData ('Mô đun:Lang/ISO 639 synonyms');-- ISO 639-2/639-2T code translation to 639-1 codelocal lang_data =  mw.loadData ('Mô đun:Lang/data');-- language name override and transliteration tool-tip tableslocal namespace = mw.title.getCurrentTitle().namespace;-- used for categorizationlocal maint_cats = {};-- maintenance categories go herelocal maint_msgs = {};-- and their messages go herelocal function isCollective( language_name )return language_name:find ('[Nn]gôn') or language_name:find ('[Nn]gữ') orlanguage_name:find ('[Tt]hoại') or language_name:find ('languages')end--[[--------------------------< I S _ S E T >------------------------------------------------------------------Returns true if argument is set; false otherwise. Argument is 'set' when it exists (not nil) or when it is not an empty string.]]local function is_set( var )return not (var == nil or var == '');end--[[--------------------------< I S _ L A T N >----------------------------------------------------------------Returns true if all of text argument is written using Latn script for letters, numbers and punctuationset; false else.For the purposes of this function, Latn script is characters less control characters from these Unicode 10.0 Character Code Charts:[http://www.unicode.org/charts/PDF/U0000.pdf C0 Controls and Basic Latin] U+0020–U+007E (20 - 7E) + see note about <poem>...</poem> support[http://www.unicode.org/charts/PDF/U0080.pdf C1 Controls and Latin-1 Supplement] U+00A0-U+00AC, U+00C0–U+00FF (C2 A0 - C2 AC, C3 80 - C3 BF: \194\160-\194\172)[http://www.unicode.org/charts/PDF/U0100.pdf Latin Extended-A] U+0100–U+017F (C4 80 - C5 BF)[http://www.unicode.org/charts/PDF/U0180.pdf Latin Extended-B] U+0180–U+024F (C6 80 - C9 8F)[http://www.unicode.org/charts/PDF/U1E00.pdf Latin Extended Additional] U+1E00-U+1EFF (E1 B8 80 - E1 BB BF)[http://www.unicode.org/charts/PDF/U2C60.pdf Latin Extended-C] U+2C60–U+2C7F (E2 B1 A0 - E2 B1 BF)[http://www.unicode.org/charts/PDF/UA720.pdf Latin Extended-D] U+A720-U+A7FF (EA 9C A0 - EA 9F BF)[http://www.unicode.org/charts/PDF/UAB30.pdf Latin Extended-E] U+AB30-U+AB6F (EA AC B0 - EA AD AF)[http://www.unicode.org/charts/PDF/UFB00.pdf Alphabetic Presentaion Forms] U+FB00-U+FB06 (EF AC 80 - EF AC 86)[http://www.unicode.org/charts/PDF/UFF00.pdf Halfwidth and Fullwidth Forms] U+FF01-U+FF3C (EF BC 81 EF BC BC)does not include:[http://www.unicode.org/charts/PDF/U1D00.pdf Phonetic Extensions] U+1D00-U+1D7F (E1 B4 80 - E1 B5 BF)[http://www.unicode.org/charts/PDF/U0250.pdf IPA Extensions] U+0250-U+02AF (C9 90 - CA AF)[http://www.unicode.org/charts/PDF/U1D80.pdf Phonetic Extensions Supplement] U+1D80-U+1DBF (E1 B6 80 - E1 B6 BF){{lang}} is used inside <poem>...</poem> tags for song lyrics, poetry, etc.  <poem>...</poem> replaces newlines withpoem stripmarkers.  These have the form:?'"`UNIQ--poem-67--QINU`"'?where the '?' character is actually the delete character (U+007F, \127).  Including the '\n' (U+0010) and 'del' (U+007F)characters in the latn character table allows {{lang}} to auto-italicize text within <poem>...</poem> tags.]]function p.is_latn (text)local latn = table.concat ({'[',-- this is a set so include opening bracket'\n\32-\127',-- C0 Controls and Basic LatinU+0020–U+007E (20 - 7E) + (U+0010 and U+007F <poem>...</poem> support)'\194\160-\194\172',-- C1 Controls and Latin-1 SupplementU+00A0-U+00AC (C2 A0 - C2 AC)'\195\128-\195\191',-- (skip shy)U+00C0–U+00FF (C3 80 - C3 BF)'\196\128-\197\191',-- Latin Extended-AU+0100–U+017F (C4 80 - C5 BF)'\198\128-\201\143',-- Latin Extended-BU+0180–U+024F (C6 80 - C9 8F)'\225\184\128-\225\187\191',-- Latin Extended AdditionalU+1E00-U+1EFF (E1 B8 80 - E1 BB BF)'\226\177\160-\226\177\191',-- Latin Extended-CU+2C60–U+2C7F (E2 B1 A0 - E2 B1 BF)'\234\156\160-\234\159\191',-- Latin Extended-DU+A720-U+A7FF (EA 9C A0 - EA 9F BF)'\234\172\176-\234\173\175',-- Latin Extended-EU+AB30-U+AB6F (EA AC B0 - EA AD AF)'\239\172\128-\239\172\134',-- Alphabetic Presentaion FormsU+FB00-U+FB06 (EF AC 80 - EF AC 86)'\239\188\129-\239\188\188',-- Halfwidth and Fullwidth FormsU+FF01-U+FF3C (EF BC 81 - EF BC BC)'–',-- ndash'—',-- mdash'«', '»',-- guillemets commonly used in several 'Latn' languages']',-- close the set});text = mw.text.decode (text, true);-- replace numeric and named html entities with their unicode characterstext = mw.ustring.gsub (text, '%[%[[^|]+|([^%]]+)%]%]', '%1');-- remove the link and markup from complex wikilink in case interwiki to non-Latn wikipediareturn not is_set (mw.ustring.gsub (text, latn, ''));-- replace all latn characters with empty space; if result is all empty space, text is latnend--[[--------------------------< I N V E R T  _ I T A L I C S >-------------------------------------------------This function attempts to invert the italic markup a args.text by adding/removing leading/trailing italic markupin args.text.  Like |italic=unset, |italic=invert disables automatic italic markup.  Individual leading/trailingapostrophes are converted to their html numeric entity equivalent so that the new italic markup doesn't becomebold markup inadvertently.Leading and trailing wiki markup is extracted from args.text into separate table elements.  Addition, removal,replacement of wiki markup is handled by a string.gsub() replacement table operating only on these separate elements.In the string.gsub() matching pattern, '.*' matches empty string as well as the three expected wiki markup patterns.This function expects that markup in args.text is complete and correct; if it is not, oddness may result.]]local function invert_italics (source)local invert_pattern_table = {-- leading/trailing markup add/remove/replace patterns[""]="\'\'",-- empty string becomes italic markup["\'\'"]="",-- italic markup becomes empty string["\'\'\'"]="\'\'\'\'\'",-- bold becomes bold italic["\'\'\'\'\'"]="\'\'\'",-- bold italic become bold};local seg = {};source = source:gsub ("%f[\']\'%f[^\']", '&#38;');-- protect single quote marks from being interpreted as bold markupseg[1] = source:match ('^(\'\'+%f[^\']).+') or '';-- get leading markup, if any; ignore single quoteseg[3] = source:match ('.+(%f[\']\'\'+)$') or '';-- get trailing markup, if any; ignore single quoteif '' ~= seg[1] and '' ~= seg[3] then-- extract the 'text' seg[2] = source:match ('^\'\'+%f[^\'](.+)%f[\']\'\'+$')-- from between leading and trailing markupelseif '' ~= seg[1] thenseg[2] = source:match ('^\'\'+%f[^\'](.+)')-- following leading markupelseif '' ~= seg[3] thenseg[2] = source:match ('(.+)%f[\']\'\'+$')-- preceding trailing markupelseseg[2] = source-- when there is no markupendseg[1] = seg[1]:gsub (".*", invert_pattern_table, 1);-- replace leading markup according to pattern tableseg[3] = seg[3]:gsub (".*", invert_pattern_table, 1);-- replace leading markup according to pattern tablereturn table.concat (seg);-- put it all back together and doneend--[[--------------------------< V A L I D A T E _ I T A L I C >------------------------------------------------validates |italic= or |italics= assigned values.When |italic= is set and has an acceptible assigned value, return the matching css font-style property value or,for the special case 'default', return nil.When |italic= is not set, or has an unacceptible assigned value, return nil and a nil error message.When both |italic= and |italics= are set, returns nil and a 'conflicting' error message.The return value nil causes the calling lang, lang_xx, or transl function to set args.italic according to the template'sdefined default ('inherit' for {{lang}}, 'inherit' or 'italic' for {{lang-xx}} depending onthe individual template's requirements, 'italic' for {{transl}}) or to the value appropriate to |script=, if set ({{lang}}and {{lang-xx}} only).Accepted values and the values that this function returns are are:nil-when |italic= absent or not set; returns nildefault-for completeness, should rarely if ever be used; returns nilyes-force args.text to be rendered in italic font; returns 'italic'no-force args.text to be rendered in normal font; returns 'normal'unset-disables font control so that font-style applied to text is dictated by markup inside or outside the template; returns 'inherit'invert-disables font control so that font-style applied to text is dictated by markup outside or inverted inside the template; returns 'invert']]local function validate_italic (italic, italics)local properties = {['yes'] = 'italic', ['no'] = 'normal', ['unset'] = 'inherit', ['invert'] = 'invert', ['default'] = nil};if italic and italics then-- return nil and an error message if both are set return nil, 'mâu thuẫn: &#124;italic= và &#124;italics=';endreturn properties[italic or italics], nil;-- return an appropriate value and a nil error messageend--[[--------------------------< I N _ A R R A Y >--------------------------------------------------------------Whether needle is in haystack]]local function in_array( needle, haystack )if needle == nil thenreturn false;endfor n,v in ipairs( haystack ) doif v == needle thenreturn n;endendreturn false;end--[[--------------------------< F O R M A T _ I E T F _ T A G >------------------------------------------------prettify ietf tags to use recommended subtag formats:code: lower casescript: sentence caseregion: upper casevariant: lower case]]local function format_ietf_tag (code, script, region, variant)local out = {};table.insert (out, code:lower());if is_set (script) thenscript = script:lower():gsub ('^%a', string.upper);table.insert (out, script);endif is_set (region) thentable.insert (out, region:upper());endif is_set (variant) thentable.insert (out, variant:lower());endreturn table.concat (out, '-');end--[[--------------------------< G E T _ I E T F _ P A R T S >--------------------------------------------------extracts and returns IETF language tag parts:primary language subtag (required) - 2 or 3 character IANA language codescript subtag - four character IANA script coderegion subtag - two-letter or three digit IANA region codevariant subtag - four digit or 5-8 alnum variant codeprivate subtag - x- followed by 1-8 alnum private code; only supported with the primary language tagin any one of these formslanglang-variantlang-scriptlang-script-variantlang-regionlang-region-variantlang-script-regionlang-script-region-variantlang-x-privateeach of lang, script, region, variant, and private, when used, must be validLanguages with both two- and three-character code synonyms are promoted to the two-character synonym becausethe IANA registry file omits the synonymous three-character code; we cannot depend on browsers understandingthe synonymous three-character codes in the lang= attribute.For {{lang-xx}} templates, the parameters |script=, |region=, and |variant= are supported (not supported in {{lang}}because those parameters are superfluous to the IETF subtags in |code=)returns six  values.  Valid parts are returned as themselves; omitted parts are returned as empty strings, invalidparts are returned as nil; the sixth returned item is an error message (if an error detected) or nil.see http://www.rfc-editor.org/rfc/bcp/bcp47.txt section 2.1]]local function get_ietf_parts (source, args_script, args_region, args_variant)local code;local script = '';local region = '';local variant = '';local private = '';if not is_set (source) thenreturn nil, nil, nil, nil, nil, 'thiếu thẻ ngôn ngữ';endif source:match ('^%a%a%a?%-%a%a%a%a%-%a%a%-%d%d%d%d$') then-- ll-Ssss-RR-variant (where variant is 4 digits)code, script, region, variant = source:match ('^(%a%a%a?)%-(%a%a%a%a)%-(%a%a)%-(%d%d%d%d)$');elseif source:match ('^%a%a%a?%-%a%a%a%a%-%d%d%d%-%d%d%d%d$') then-- ll-Ssss-DDD-variant (where region is 3 digits; variant is 4 digits)code, script, region, variant = source:match ('^(%a%a%a?)%-(%a%a%a%a)%-(%d%d%d)%-(%d%d%d%d)$');elseif source:match ('^%a%a%a?%-%a%a%a%a%-%a%a%-[%a%d][%a%d][%a%d][%a%d][%a%d]+$') then-- ll-Ssss-RR-variant (where variant is 5-8 alnum characters)code, script, region, variant = source:match ('^(%a%a%a?)%-(%a%a%a%a)%-(%a%a)%-([%a%d][%a%d][%a%d][%a%d][%a%d][%a%d]?[%a%d]?[%a%d]?)$');elseif source:match ('^%a%a%a?%-%a%a%a%a%-%d%d%d%-[%a%d][%a%d][%a%d][%a%d][%a%d]+$') then-- ll-Ssss-DDD-variant (where region is 3 digits; variant is 5-8 alnum characters)code, script, region, variant = source:match ('^(%a%a%a?)%-(%a%a%a%a)%-(%d%d%d)%-([%a%d][%a%d][%a%d][%a%d][%a%d][%a%d]?[%a%d]?[%a%d]?)$');elseif source:match ('^%a%a%a?%-%a%a%a%a%-%d%d%d%d$') then-- ll-Ssss-variant (where variant is 4 digits)code, script, variant = source:match ('^(%a%a%a?)%-(%a%a%a%a)%-(%d%d%d%d)$');elseif source:match ('^%a%a%a?%-%a%a%a%a%-[%a%d][%a%d][%a%d][%a%d][%a%d]+$') then-- ll-Ssss-variant (where variant is 5-8 alnum characters)code, script, variant = source:match ('^(%a%a%a?)%-(%a%a%a%a)%-([%a%d][%a%d][%a%d][%a%d][%a%d][%a%d]?[%a%d]?[%a%d]?)$');elseif source:match ('^%a%a%a?%-%a%a%-%d%d%d%d$') then-- ll-RR-variant (where variant is 4 digits)code, region, variant = source:match ('^(%a%a%a?)%-(%a%a)%-(%d%d%d%d)$');elseif source:match ('^%a%a%a?%-%d%d%d%-%d%d%d%d$') then-- ll-DDD-variant (where region is 3 digits; variant is 4 digits)code, region, variant = source:match ('^(%a%a%a?)%-(%d%d%d)%-(%d%d%d%d)$');elseif source:match ('^%a%a%a?%-%a%a%-[%a%d][%a%d][%a%d][%a%d][%a%d]+$') then-- ll-RR-variant (where variant is 5-8 alnum characters)code, region, variant = source:match ('^(%a%a%a?)%-(%a%a)%-([%a%d][%a%d][%a%d][%a%d][%a%d][%a%d]?[%a%d]?[%a%d]?)$');elseif source:match ('^%a%a%a?%-%d%d%d%-[%a%d][%a%d][%a%d][%a%d][%a%d]+$') then-- ll-DDD-variant (where region is 3 digits; variant is 5-8 alnum characters)code, region, variant = source:match ('^(%a%a%a?)%-(%d%d%d)%-([%a%d][%a%d][%a%d][%a%d][%a%d][%a%d]?[%a%d]?[%a%d]?)$');elseif source:match ('^%a%a%a?%-%d%d%d%d$') then-- ll-variant (where variant is 4 digits)code, variant = source:match ('^(%a%a%a?)%-(%d%d%d%d)$');elseif source:match ('^%a%a%a?%-[%a%d][%a%d][%a%d][%a%d][%a%d][%a%d]?[%a%d]?[%a%d]?$') then-- ll-variant (where variant is 5-8 alnum characters)code, variant = source:match ('^(%a%a%a?)%-([%a%d][%a%d][%a%d][%a%d][%a%d][%a%d]?[%a%d]?[%a%d]?)$');elseif source:match ('^%a%a%a?%-%a%a%a%a%-%a%a$') then-- ll-Ssss-RRcode, script, region = source:match ('^(%a%a%a?)%-(%a%a%a%a)%-(%a%a)$');elseif source:match ('^%a%a%a?%-%a%a%a%a%-%d%d%d$') then-- ll-Ssss-DDD (region is 3 digits)code, script, region = source:match ('^(%a%a%a?)%-(%a%a%a%a)%-(%d%d%d)$');elseif source:match ('^%a%a%a?%-%a%a%a%a$') then-- ll-Sssscode, script = source:match ('^(%a%a%a?)%-(%a%a%a%a)$');elseif source:match ('^%a%a%a?%-%a%a$') then-- ll-RRcode, region = source:match ('^(%a%a%a?)%-(%a%a)$');elseif source:match ('^%a%a%a?%-%d%d%d$') then-- ll-DDD (region is 3 digits)code, region = source:match ('^(%a%a%a?)%-(%d%d%d)$');elseif source:match ('^%a%a%a?$') then-- llcode = source:match ('^(%a%a%a?)$');elseif source:match ('^%a%a%a?%-x%-[%a%d][%a%d]?[%a%d]?[%a%d]?[%a%d]?[%a%d]?[%a%d]?[%a%d]?$') then-- ll-x-pppppppp)code, private = source:match ('^(%a%a%a?)%-x%-([%a%d]+)$');elsereturn nil, nil, nil, nil, nil, table.concat ({'thẻ ngôn ngữ không rõ: ', source});-- don't know what we got but it is malformedendcode = code:lower();-- ensure that we use and return lower case version of thisif not (lang_data.override[code] or lang_name_table.lang[code]) thenreturn nil, nil, nil, nil, nil, table.concat ({'mã ngôn ngữ không rõ: ', code});-- invalid language code, don't know about the others (don't care?)endif synonym_table[code] then-- if 639-2/639-2T code has a 639-1 synonymtable.insert (maint_cats, table.concat ({'Mã lang và lang-xx được nâng cấp thành ISO 639-1|', code}));table.insert (maint_msgs, table.concat ({'mã ngôn ngữ: ', code, ' được nâng cấp thành mã: ', synonym_table[code]}));code = synonym_table[code];-- use the synonymendif is_set (script) thenif is_set (args_script) thenreturn code, nil, nil, nil, nil, 'thẻ hệ chữ viết thừa';-- both code with script and |script= not allowedendelsescript = args_script or '';-- use args.script if providedend if is_set (script) thenscript = script:lower();-- ensure that we use and return lower case version of thisif not lang_name_table.script[script] thenreturn code, nil, nil, nil, nil, table.concat ({'hệ chữ viết không rõ: ', script, ' cho mã ngôn ngữ: ', code});-- language code ok, invalid script, don't know about the others (don't care?)endendif lang_name_table.suppressed[script] then-- ensure that code-script does not use a suppressed scriptif in_array (code, lang_name_table.suppressed[script]) thenreturn code, nil, nil, nil, nil, table.concat ({'không hỗ trợ hệ chữ viết: ', script, ' cho mã ngôn ngữ: ', code});-- language code ok, script is suppressed for this codeendendif is_set (region) thenif is_set (args_region) thenreturn code, nil, nil, nil, nil, 'thẻ vùng thừa';-- both code with region and |region= not allowedendelseregion = args_region or '';-- use args.region if providedend if is_set (region) thenregion = region:lower();-- ensure that we use and return lower case version of thisif not lang_name_table.region[region] thenreturn code, script, nil, nil, nil, table.concat ({'vùng không rõ: ', region, ' cho mã ngôn ngữ: ', code});endendif is_set (variant) thenif is_set (args_variant) thenreturn code, nil, nil, nil, nil, 'thẻ biến thể thừa';-- both code with variant and |variant= not allowedendelsevariant = args_variant or '';-- use args.variant if providedend if is_set (variant) thenvariant = variant:lower();-- ensure that we use and return lower case version of thisif not lang_name_table.variant[variant] then-- make sure variant is validreturn code, script, region, nil, nil, table.concat ({'biến thể không rõ: ', variant});end-- does this duplicate/replace tests in lang() and lang_xx()?if is_set (script) then-- if script set it must be part of the 'prefix'if not in_array (table.concat ({code, '-', script}), lang_name_table.variant[variant]['prefixes']) thenreturn code, script, region, nil, nil, table.concat ({'biến thể không rõ: ', variant, ' for code-script pair: ', code, '-', script});endelseif not in_array (code, lang_name_table.variant[variant]['prefixes']) thenreturn code, script, region, nil, nil, table.concat ({'biến thể không rõ: ', variant, ' cho mã ngôn ngữ: ', code});endendendif is_set (private) thenprivate = private:lower();-- ensure that we use and return lower case version of thisif not lang_data.override[table.concat ({code, '-x-', private})] then-- make sure private tag is valid; note that index return code, script, region, nil, nil, table.concat ({'thẻ riêng tư không rõ: ', private});endendreturn code, script, region, variant, private, nil;-- return the good bits; make sure that msg is nilend--[[--------------------------< M A K E _ E R R O R _ M S G >--------------------------------------------------assembles an error message from template name, message text, help link, and error category.]]local function make_error_msg (msg, args, template)local out = {};local category;if 'transl' == template thencategory = 'transl';elsecategory = 'lang và lang-xx'endtable.insert (out, table.concat ({'&#x5B;', args.text or 'undefined', '&#x5D; '}));-- for error messages output args.text if availabletable.insert (out, table.concat ({'<span style=\"font-size:100%; font-style:normal;\" class=\"error\">lỗi: {{', template, '}}: '}));table.insert (out, msg);table.insert (out, table.concat ({' ([[:Thể loại:Lỗi bản mẫu ', category, '|trợ giúp]])'}));table.insert (out, '</span>');if (0 == namespace) and not is_set (args.nocat) then-- only categorize in article spacetable.insert (out, table.concat ({'[[Thể loại:Lỗi bản mẫu ', category, ']]'}));endreturn table.concat (out);end--[=[-------------------------< M A K E _ W I K I L I N K >----------------------------------------------------Makes a wikilink; when both link and display text is provided, returns a wikilink in the form [[L|D]]; if onlylink is provided, returns a wikilink in the form [[L]]; if neither are provided or link is omitted, returns anempty string.]=]local function make_wikilink (link, display)if is_set (link) thenif is_set (display) thenreturn table.concat ({'[[', link, '|', display, ']]'});elsereturn table.concat ({'[[', link, ']]'});endelsereturn '';endend--[[--------------------------< M A K E _ T E X T _ S P A N >--------------------------------------------------TODO: add support for block: div tags instead of span tags; would need some sort of proper parameter to control the switchFor italic style, can't do ''{{lang|xx|text}}'' without using <span/> tags when text is italic because of -Latn, |italic=yes,or auto-italics because the wrapping wikimarkup produces this:<i><i lang="xx">text</i></i>which is later reduced to this:<i>text</i>This reduction happens in some sort of cleanup process outside the scope of this template/module.Until or unless this is fixed italic text must be:<i><span lang="xx">text</span></i>]]local function make_text_span (code, text, rtl, style, size, language)local span = {};local style_added = '';if text:match ('^%*') thentable.insert (span, '&#42;');-- move proto language text prefix outside of italic markup if any; use numeric entity because plan splat confuses MediaWikitext = text:gsub ('^%*', '');-- remove the splat from the textendif 'italic' == style thentable.insert (span, '<i>');-- open italic style tagendtable.insert (span, table.concat ({'<span lang="'}));-- open <span> tagtable.insert (span, table.concat ({code, '\"'}));-- add language attributeif rtl thentable.insert (span, ' dir="rtl"');-- add direction attribute for right to left languagesendif 'normal' == style then-- when |italic=notable.insert (span, ' style=\"font-style:normal;');-- override external markup, if anystyle_added = '\"';-- remember that style attribute added and is not yet closedendif is_set (size) then-- when |size=<something>if is_set (style_added) thentable.insert (span, table.concat ({' font-size:', size, ';'}));-- add when style attribute already insertedelsetable.insert (span, table.concat ({' style=\"font-size:', size, ';'}));-- create style attributestyle_added = '\"';-- remember that style attribute added and is not yet closedendendif is_set (language) thentable.insert (span, table.concat ({style_added, ' title=\"'}));--start the title textif language:find ('languages') thentable.insert (span, 'Văn bản ngôn ngữ ');-- for collective languageselsetable.insert (span, 'Văn bản tiếng ');-- for individual languagesendtable.insert (span, table.concat ({language, '\">'}));-- close the opening span tagelsetable.insert (span, table.concat ({style_added, '>'}));-- close the style attribute and close opening span tagendtable.insert (span, text);-- insert the texttable.insert (span, '</span>');-- close the <span> tagif 'italic' == style thentable.insert (span, '</i>');-- close italic style tagendif rtl then-- legacy; shouldn't be necessary because all of the rtl text is wrapped in <span dir="rtl">text</span>table.insert (span, '&lrm;');-- make sure the browser knows that we're at the end of the rtlendreturn table.concat (span);-- put it all together and doneend--[=[-------------------------< M A K E _ C A T E G O R Y >----------------------------------------------------For individual language, <language>, returns:[[Thể loại:Bài viết có văn bản <language>]]for Vietnamese:[[Thể loại:Bài viết có văn bản tiếng Việt nêu rõ]]for artificial languages (code: art)[[Thể loại:Bài viết có văn bản trong ngôn ngữ được xây dựng]]for ISO 639-2 collective languages (and for 639-1 bh):[[Thể loại:Bài viết có văn bản <language>]]]=]local function make_category (code, language_name, nocat)local cat = {};if (0 ~= namespace) or nocat then-- only categorize in article spacereturn '';-- return empty string for concatenationendif isCollective(language_name) thenreturn table.concat ({'[[Thể loại:Bài viết có văn bản ', language_name, ']]'});endtable.insert (cat, '[[Thể loại:Bài viết có văn bản ');if 'vi' == code thentable.insert (cat, 'tiếng Việt nêu rõ');elseif 'art' == code thentable.insert (cat, 'trong ngôn ngữ được xây dựng')elsetable.insert (cat, 'tiếng ' .. language_name);endtable.insert (cat, ']]');return table.concat (cat);end--[[--------------------------< M A K E _ T R A N S L I T >----------------------------------------------------return translit <i lang=xx-Latn>...</i> where xx is the language code; else return empty stringThe value |script= is not used in {{transl}} for this purpose; instead it uses |code.  Because language scriptsare listed in the {{transl}} switches they are included in the data tables.  The script parameter is introducedat {{Language with name and transliteration}}.  If |script= is set, this function uses it in preference to code.To avoid confusion, in this module and the templates that use it, the transliteration script parameter is renamedto be |translit-script= (in this function, tscript)This function is used by both lang_xx() and transl()lang_xx() always provides code, language_name, and translit; may provide tscript; never provides styletransl() always provides language_name, translit, and one of code or tscript, never both; always provides styleFor {{transl}}, style only applies when a language code is provided]]local function make_translit (code, language_name, translit, std, tscript, style)local title;local tout = {};local title_table = lang_data.translit_title_table;-- table of transliteration standards and the language codes and scripts that apply to those standardsif is_set (code) then-- when a language code is provided (always with {{lang-xx}} templates, not always with {{transl}})if not style then-- nil for is the default italic styletable.insert (tout, "<i lang=\"");-- so use <i> tagelsetable.insert (tout, table.concat ({'<span style=\"font-style:', style, '\" lang=\"'}));-- non-standard style, construct a span tag for itendtable.insert (tout, code);table.insert (tout, "-Latn\" title=\"");-- transliterations are always Latin scriptelsetable.insert (tout, "<span title=\"");-- when no language code: no lang= attribute, not italic ({{transl}} only)endstd = std and std:lower();-- lower case for table indexingif not is_set (std) and not is_set (tscript) then-- when neither standard nor script specifiedtable.insert (tout, 'Chuyển tự ');-- start the tool tipif not isCollective(language_name) then-- collective language names (plural 'languages' is part of the name)table.insert (tout, 'tiếng ')-- skip this text (individual and macro languages only)endtable.insert (tout, language_name);-- write a generic tool tipelseif is_set (std) and is_set (tscript) then-- when both are specifiedif title_table[std] then-- and if standard is legitimateif title_table[std][tscript] then-- and if script for that standard is legitimatetable.insert (tout, table.concat ({'Chuyển tự tiếng ', title_table[std][tscript:lower()], ' (chữ ', lang_name_table.script[tscript][1]}));-- add the appropriate text to the tool tipelsetable.insert (tout, title_table[std]['default']);-- use the default if script not in std table; TODO: maint cat? error message because script not found for this standard?endelsereturn '';-- invalid standard, setup for error messageendelseif is_set (std) then-- translit-script not set, use language codeif not title_table[std] then return ''; end-- invalid standard, setup for error messageif title_table[std][code] then-- if language code is in the table (transl may not provide a language code)table.insert (tout, table.concat ({title_table[std][code:lower()], ' (', lang_name_table.lang[code][1], ' language) transliteration'}));-- add the appropriate text to the tool tipelse-- code doesn't matchtable.insert (tout, title_table[std]['default']);-- so use the standard's defaultendelse-- here if translit-script set but translit-std not setif title_table['no_std'][tscript] thentable.insert (tout, title_table['no_std'][tscript]);-- use translit-script if setelseif title_table['no_std'][code] thentable.insert (tout, title_table['no_std'][code]);-- use language codeelseif is_set (tscript) thentable.insert (tout, table.concat ({'Chuyển tự tiếng ', language_name}));-- write a script tool tipelseif is_set (code) thenif not isCollective(language_name) then-- collective language names (plural 'languages' is part of the name)table.insert (tout, '-language')-- skip this text (individual and macro languages only)endtable.insert (tout, ' transliteration');-- finish the tool tipelsetable.insert (tout, ' transliteration');-- generic tool tip (can we ever get here?)endendendtable.insert (tout, '">');table.insert (tout, translit);if is_set (code) and not style then-- when a language code is provided (always with {{lang-xx}} templates, not always with {{transl}})table.insert (tout, "</i>");-- close the italic tagelsetable.insert (tout, "</span>");-- no language code so close the span tagendreturn table.concat (tout);end--[=[-------------------------< V A L I D A T E _ T E X T >---------------------------------------------------This function checks the content of args.text and returns empty string if nothing is amiss else it returns anerror message.  The tests are for empty or missing text and for improper or disallowed use of apostrophe markup.Italic rendering is controlled by the |italic= template parameter so italic markup should never appear in args.texteither as ''itself''' or as '''''bold italic'''''.]=]local function validate_text (template, args)if not is_set (args.text) thenreturn make_error_msg ('không có văn bản', args, template);endif args.text:find ("%f[\']\'\'\'\'%f[^\']") or args.text:find ("\'\'\'\'\'[\']+") then-- because we're looking, look for 4 appostrophes or 6+ appostrophesreturn make_error_msg ('văn bản có thẻ đánh dấu hỏng', args, template);endlocal style = args.italic or args.italics;--if ('unset' ~= args.italic) and ('unset' ~= args.italics) then-- allow italic markup when |italic=unset or |italics=unsetif ('unset' ~= style) and ('invert' ~=style) thenif args.text:find ("%f[\']\'\'%f[^\']") or args.text:find ("%f[\']\'\'\'\'\'%f[^\']") then-- italic but not bold, or bold italicreturn make_error_msg ('văn bản có thẻ đánh dấu in xiên', args, template);endendend--[[--------------------------< R E N D E R _ M A I N T >------------------------------------------------------render mainenance messages and categories]]local function render_maint(nocat)local maint = {};if 0 < #maint_msgs then-- when there are maintenance messagestable.insert (maint, table.concat ({'<span class="lang-comment" style="font-style:normal; display:none; color:#33aa33; margin-left:0.3em">'}));-- opening <span> tagfor _, msg in ipairs (maint_msgs) dotable.insert (maint, table.concat ({msg, ' '}));-- add message stringsendtable.insert (maint, '</span>');-- close the spanendif (0 < #maint_cats) and (0 == namespace) and not is_set (nocat) then-- when there are mainenance categories; article namespace onlyfor _, cat in ipairs (maint_cats) dotable.insert (maint, table.concat ({'[[Thể loại:', cat, ']]'}));-- format and add the categoriesendendreturn table.concat (maint);end--[[--------------------------< P R O T O _ P R E F I X >------------------------------------------------------for proto languages, text is prefixed with a splat.  We do that here as a flag for make_text_span() so that a splatwill be rendered outside of italic markup (if used).  If the first character in text here is already a splat, wedo nothing]]local function proto_prefix (text, language_name)if (language_name:find ('^Proto%-') or language_name:find (' nguyên th[uủ][yỷ]$')) and not text:find ('^*') then-- language is a proto and text does not already have leading splatreturn table.concat ({'*', text});-- prefix proto language text with a splatendreturn text;end--[[--------------------------< L A N G >----------------------------------------------------------------------entry point for {{lang}}there should be no reason to set parameters in the {{lang}} {{#invoke:}}<includeonly>{{#invoke:lang|lang}}</includeonly>parameters are recieved from the template's frame (parent frame)]]function p.lang (frame)local args = getArgs(frame);local out = {};local language_name;-- used to make category nameslocal subtags = {};-- IETF subtags script, region, variant, and privatelocal code;-- the language codelocal msg;-- for error messagesif args[1] and args.code thenreturn make_error_msg ('mâu thuẫn: {{{1}}} và &#124;code=', args, 'lang');elseargs.code = args[1] or args.code;-- prefer args.codeendif args[2] and args.text thenreturn make_error_msg ('mâu thuẫn: {{{2}}} và &#124;text=', args, 'lang');elseargs.text = args[2] or args.text;-- prefer args.textendmsg = validate_text ('lang', args);-- ensure that |text= is set  (italic test disabled for the time being)if is_set (msg) then-- msg is an already-formatted error messagereturn msg;endargs.rtl = args.rtl == 'yes';-- convert to boolean: 'yes' -> true, other values -> falsecode, subtags.script, subtags.region, subtags.variant, subtags.private, msg = get_ietf_parts (args.code);-- |script=, |region=, |variant= not supported because they should be part of args.code ({{{1}}} in {{lang}})if msg thenreturn make_error_msg ( msg, args, 'lang');endargs.italic, msg = validate_italic (args.italic, args.italics);if msg thenreturn make_error_msg (msg, args, 'lang');endif nil == args.italic then-- nil when |italic= absent or not set or |italic=default; args.italic controlsif ('latn' == subtags.script) or (p.is_latn (args.text) and 'vi' ~= code) then-- script set to latn or text is wholly latn script but not rendering Vietnameseargs.italic = 'italic';-- DEFAULT for {{lang}} templates is upright; but if latn script set for font-style:italicelseargs.italic = 'inherit';-- italic not set; script not latn; inherit current styleendendif is_set (subtags.script) then-- if script set, override rtl settingif in_array (subtags.script, lang_data.rtl_scripts) thenargs.rtl = true;-- script is an rtl scriptelseargs.rtl = false;-- script is not an rtl scriptendendargs.code = format_ietf_tag (code, subtags.script, subtags.region, subtags.variant);-- format to recommended subtag styles; private omitted because privateif is_set (subtags.private) and lang_data.override[table.concat ({code, '-x-', subtags.private})] then-- look for private use tags; done this way because ...language_name = lang_data.override[table.concat ({code, '-x-', subtags.private})][1];-- ... args.code does not get private subtagelseif lang_data.override[code] then-- get the language name for categorizationlanguage_name = lang_data.override[code][1]-- prefer language names taken from the override tableelseif lang_name_table.lang[code] thenlanguage_name = lang_name_table.lang[code][1];-- table entries sometimes have multiple names, always take the first oneendif 'invert' == args.italic thenargs.text = invert_italics (args.text)endargs.text = proto_prefix (args.text, language_name);-- prefix proto-language text with a splattable.insert (out, make_text_span (args.code, args.text, args.rtl, args.italic, args.size, language_name));table.insert (out, make_category (code, language_name, args.nocat));table.insert (out, render_maint(args.nocat));-- maintenance messages and categoriesreturn table.concat (out);-- put it all together and doneend--[[--------------------------< L A N G _ X X >----------------------------------------------------------------For the {{lang-xx}} templates, the only parameter required to be set in the template is the language code.  Allother parameters can, usually should, be written in the template call.  For {{lang-xx}} templates for languagesthat can have multiple writing systems, it may be appropriate to set |script= as well.For each {{lang-xx}} template choose the appropriate entry-point function so that this function know the defaultstyling that should be applied to text.For normal, upright style:<includeonly>{{#invoke:lang|lang_xx_inherit|code=xx}}</includeonly>For italic style:<includeonly>{{#invoke:lang|lang_xx_italic|code=xx}}</includeonly>All other parameters should be received from the template's frame (parent frame)Supported parameters are:|code = (required) the IANA language code|script = IANA script code; especially for use with languages that use multiple writing systems; yields to the script subtag in |code= if present [not yet implemented]|region = IANA region code|variant = IANA variant code|text = (required) the displayed text in language specified by code|link = boolean false ('no') unlinks language specified by code to associated language article|rtl = boolean true ('yes') identifies the language specified by code as a right-to-left language|nocat = boolean true ('yes') inhibits normal categorization; error categories are not affected|italic = boolean true ('yes') renders displayed text in italic font; boolean false ('no') renders displayed text in normal font; not set renders according to initial_style_state|lit = text that is a literal translation of text|label ='none' to suppress all labeling (language name, 'translit.', 'lit.')any other text replaces language-name label - automatic wikilinking disabledfor those {{lang-xx}} templates that support transliteration (those template where |text= is entirely latn script):|translit = text that is a transliteration of text|translit-std = the standard that applies to the transliteration|translit-script = ISO 15924 script name; falls back to codeFor {{lang-xx}}, the positional parameters are:{{{1}}}text{{{2}}}transliterated text{{{3}}}literal translation textno other positional parameters are allowed]]local function _lang_xx (frame)local args = getArgs(frame, {parentFirst= true});-- parameters in the template override parameters set in the {{#invoke:}}local out = {};local language_name;-- used to make display text, article linkslocal category_name;-- same as language_name except that it retains any parenthetical disambiguators (if any) from the data setlocal subtags = {};-- IETF subtags script, region, and variantlocal code;-- the language codelocal translit_script_name;-- name associated with IANA (ISO 15924) script codelocal translit;local translit_title;local msg;-- for error messagesif args[1] and args.text thenreturn make_error_msg ('mâu thuẫn: {{{1}}} và &#124;text=', args, 'lang-xx');elseargs.text = args[1] or args.text;-- prefer args.textendmsg = validate_text ('lang-xx', args);-- ensure that |text= is set, does not contain italic markup and is protected from improper boldingif is_set (msg) thenreturn msg;endif args[2] and args.translit thenreturn make_error_msg ('mâu thuẫn: {{{2}}} và &#124;translit=', args, 'lang-xx');elseargs.translit = args[2] or args.translit-- prefer args.translitendif args[3] and (args.translation or args.lit) thenreturn make_error_msg ('mâu thuẫn: {{{3}}} và &#124;lit= hoặc &#124;translation=', args, 'lang-xx');elseif args.translation and args.lit thenreturn make_error_msg ('mâu thuẫn: &#124;lit= và &#124;translation=', args, 'lang-xx');elseargs.translation = args[3] or args.translation or args.lit;-- prefer args.translationendif args.links and args.link thenreturn make_error_msg ('mâu thuẫn: &#124;links= và &#124;link=', args, 'lang-xx');elseargs.link = args.link or args.links;-- prefer args.linkendargs.rtl = args.rtl == 'yes';-- convert to boolean: 'yes' -> true, other values -> falsecode, subtags.script, subtags.region, subtags.variant, subtags.private, msg = get_ietf_parts (args.code, args.script, args.region, args.variant);-- private omitted because privateif msg then-- if an error detected then there is an error messagereturn make_error_msg (msg, args, 'lang-xx');endargs.italic, msg = validate_italic (args.italic, args.italics);if msg thenreturn make_error_msg (msg, args, 'lang-xx');endif nil == args.italic then-- args.italic controlsif is_set (subtags.script) thenif 'latn' == subtags.script thenargs.italic = 'italic';-- |script=Latn; set for font-style:italicelseargs.italic = initial_style_state;-- italic not set; script is not latn; set for font-style:<initial_style_state>endelseargs.italic = initial_style_state;-- here when |italic= and |script= not set; set for font-style:<initial_style_state>endendif is_set (subtags.script) then-- if script set override rtl settingif in_array (subtags.script, lang_data.rtl_scripts) thenargs.rtl = true;-- script is an rtl scriptelseargs.rtl = false;-- script is not an rtl scriptendendargs.code = format_ietf_tag (code, subtags.script, subtags.region, subtags.variant);-- format to recommended subtag stylesif is_set (subtags.private) and lang_data.override[table.concat ({code, '-x-', subtags.private})] then-- look for private use tags; done this way because ...language_name = lang_data.override[table.concat ({code, '-x-', subtags.private})][1];-- ... args.code does not get private subtagelseif lang_data.override[args.code:lower()] then-- look for whole IETF tag in override tablelanguage_name = lang_data.override[args.code:lower()][1];-- args.code:lower() because format_ietf_tag() returns mixed caseelseif lang_data.override[code] then-- not there so try basic language codelanguage_name = lang_data.override[code][1];elseif not is_set (subtags.variant) thenif lang_name_table.lang[code] thenlanguage_name = lang_name_table.lang[code][1];-- table entries sometimes have multiple names, always take the first oneendelse-- TODO: is this the right thing to do: take language display name from variants table?if lang_name_table.variant[subtags.variant] then-- TODO: there is some discussion at Template talk:Lang about having a label parameter for use when variant name is not desired among other thingslanguage_name = lang_name_table.variant[subtags.variant]['descriptions'][1];-- table entries sometimes have multiple names, always take the first oneendendcategory_name = language_name;-- category names retain IANA parenthetical diambiguators (if any)language_name = language_name:gsub ('%s+%b()', '');-- remove IANA parenthetical disambiguators or qualifiers from names that have themif args.label thenif 'none' ~= args.label thentable.insert (out, table.concat ({'tiếng ', args.label, ': '}));-- custom labelendelseif 'no' == args.link thentable.insert (out, table.concat ({'tiếng ', language_name}));-- language name without wikilinkelseif isCollective(language_name) thentable.insert (out, make_wikilink (language_name));-- collective language name uses simple wikilinkelsetable.insert (out, make_wikilink (table.concat ({'tiếng ', language_name})));-- language name with wikilinkendendtable.insert (out, ': ');-- separatorendif 'invert' == args.italic thenargs.text = invert_italics (args.text)endargs.text = proto_prefix (args.text, language_name);-- prefix proto-language text with a splattable.insert (out, make_text_span (args.code, args.text, args.rtl, args.italic, args.size))if is_set (args.translit) and not p.is_latn (args.text) then-- transliteration (not supported in {{lang}}); not supported when args.text is wholly latn text (this is an imperfect test)table.insert (out, ', ');-- comma to separate text from translitif 'none' ~= args.label thentable.insert (out, '<small>');if lang_name_table.script[args['translit-script']] then-- when |translit-script= is set, try to use the script's nametranslit_script_name = lang_name_table.script[args['translit-script'][1]];elsetranslit_script_name = language_name;-- fall back on language nameendtranslit_title = mw.title.makeTitle (0, table.concat ({'Latinh hóa chữ ', translit_script_name}));-- make a title objectif translit_title.exists and ('no' ~= args.link) thentable.insert (out, make_wikilink ('Latinh hóa chữ ' .. translit_script_name or language_name, 'chuyển&nbsp;tự'));-- make a wikilink if there is an article to link toelsetable.insert (out, 'chuyển&nbsp;tự');-- else define the abbreviationendtable.insert (out, '&nbsp;</small>');-- close the small tagendtranslit = make_translit (args.code, language_name, args.translit, args['translit-std'], args['translit-script'])if is_set (translit) thentable.insert (out, translit);elsereturn make_error_msg (table.concat ({'translit-std không hợp lệ: \'', args['translit-std'] or '[missing]'}), args, 'lang-xx');endendif is_set (args.translation) then-- translation (not supported in {{lang}})table.insert (out, ', ');if 'none' ~= args.label thentable.insert (out, '<small>');if 'no' == args.link thentable.insert (out, 'dịch nguyên&nbsp;văn');elsetable.insert (out, make_wikilink ('Dịch nguyên văn', 'nguyên&nbsp;văn'));endtable.insert (out, "&nbsp;</small>");endtable.insert (out, table.concat ({'&#39;', args.translation, '&#39;'}));-- use html entities to avoid wiki markup confusionendtable.insert (out, make_category (code, category_name, args.nocat));table.insert (out, render_maint(args.nocat));-- maintenance messages and categoriesreturn table.concat (out);-- put it all together and doneend--[[--------------------------< L A N G _ X X _ I T A L I C >--------------------------------------------------Entry point for those {{lang-xx}} templates that call lang_xx_italic().  Sets the initial style state to italic.]]function p.lang_xx_italic (frame)initial_style_state = 'italic';return _lang_xx (frame);end--[[--------------------------< L A N G _ X X _ I N H E R I T >------------------------------------------------Entry point for those {{lang-xx}} templates that call lang_xx_inherit().  Sets the initial style state to inherit.]]function p.lang_xx_inherit (frame)initial_style_state = 'inherit';return _lang_xx (frame);end--[[--------------------------< N A M E _ F R O M _ C O D E >--------------------------------------------------Returns language name associated with IETF language tag if valid; empty string else.All code combinations supported by {{lang}} and the {{lang-xx}} templates are supported by this function.]]function p.name_from_code (frame)local subtags = {};-- IETF subtags script, region, variant, and privatelocal raw_code = (frame.args and frame.args[1]) or frame;-- save a copy of the inputlocal code;-- the language codelocal msg;-- holds an error message (not used here) if IETF language tag is malformed or invalidlocal language_name = '';code, subtags.script, subtags.region, subtags.variant, subtags.private, msg = get_ietf_parts (raw_code);if msg thenreturn '';endif lang_data.override[raw_code:lower()] then-- look for whole IETF tag in override table (force lower case)language_name = lang_data.override[raw_code:lower()][1];elseif lang_data.override[code] then-- not there so try basic language code in override tablelanguage_name = lang_data.override[code][1];elseif not is_set (subtags.variant) thenif lang_name_table.lang[code] thenlanguage_name = lang_name_table.lang[code][1];-- table entries sometimes have multiple names, always take the first oneendelse-- TODO: is this the right thing to do: take language display name from variants table?if lang_name_table.variant[subtags.variant] then-- TODO: there is some discussion at Template talk:Lang about having a label parameter for use when variant name is not desired among other thingslanguage_name = lang_name_table.variant[subtags.variant]['descriptions'][1];-- table entries sometimes have multiple names, always take the first oneendendlanguage_name = language_name:gsub ('%s+%b()', '');-- remove IANA parenthetical disambiguators or qualifiers from names that have themreturn language_name;end--[[--------------------------< T R A N S L >------------------------------------------------------------------Prospective replacement for the template {{transl}}]]function p.transl (frame)local args = getArgs(frame);-- no {{#invoke:}} parameterslocal title_table = lang_data.translit_title_table;-- table of transliteration standards and the language codes and scripts that apply to those standardslocal language_name;-- language name that matches language code; used for tool tiplocal translit;-- translitterated text to displaylocal script;-- IANA scriptlocal msg;-- for when called functions return an error messageif is_set (args[3]) then-- [3] set when {{transl|code|standard|text}}args.text = args[3];-- get the transliterated textargs.translit_std = args[2] and args[2]:lower();-- get the standard; lower case for table indexingif not title_table[args.translit_std] thenreturn make_error_msg (table.concat ({'tiêu chuẩn chuyển tự không rõ: ', args.translit_std}), args, 'transl');endelseif is_set (args[2]) then-- [2] set when {{transl|code|text}}args.text = args[2];-- get the transliterated textelseif args[1] and args[1]:match ('^%a%a%a?%a?$') then-- args[2] missing; is args[1] a code or its it the transliterated text?return make_error_msg ('không có văn bản', args, 'transl');-- args[1] is a code so we're missing textelseargs.text = args[1];-- args[1] is not a code so we're missing that; assign args.text for error messagereturn make_error_msg ('thiếu mã ngôn ngữ / hệ chữ viết', args, 'transl');endendendif is_set (args[1]) then-- IANA language code used for html lang= attribute; or ISO 15924 script codeif args[1]:match ('^%a%a%a?%a?$') then-- args[1] has correct form?args.code = args[1]:lower();-- use the language/script code; only (2, 3, or 4 alpha characters); lower case because table indexes are lower caseelsereturn make_error_msg (table.concat ({'mã ngôn ngữ / hệ chữ viết không rõ: ', args[1]}), args, 'transl');-- invalid language / script codeendelsereturn make_error_msg ('thiếu mã ngôn ngữ / hệ chữ viết', args, 'transl');-- missing language / script code so quitendargs.italic, msg = validate_italic (args.italic, args.italics);if msg thenreturn make_error_msg (msg, args, 'transl');endif 'italic' == args.italic then-- 'italic' when |italic=yes; because that is same as absent or not set and |italic=defaultargs.italic = nil;-- set to nil; endif lang_data.override[args.code] then-- is code a language code defined in the override table?language_name = lang_data.override[args.code][1];elseif lang_name_table.lang[args.code] then-- is code a language code defined in the standard language code tables?language_name = lang_name_table.lang[args.code][1];elseif lang_name_table.script[args.code] then-- if here, code is not a language code; is it a script code?language_name = lang_name_table.script[args.code][1];script = args.code;-- code was an ISO 15924 script so use that insteadargs.code = '';-- unset because not a language codeelsereturn make_error_msg (table.concat ({'mã ngôn ngữ / hệ chữ viết không rõ: ', args.code}), args, 'transl');-- invalid language / script codeend-- here only when all parameters passed to make_translit() are validreturn make_translit (args.code, language_name, args.text, args.translit_std, script, args.italic);endreturn p;