Modul:Lang

--[=[
Lua support for the {{lang}}, {{langx}}, {{lang-??}}, and {{transliteration}} templates and replacement of various supporting templates. 
]=]
require('strict');
localgetArgs=require('Modul:Arguments').getArgs;
localunicode=require("Modul:Unicode data");-- for is_Latin() and is_rtl()
localyesno=require('Modul:Yesno');
localsandbox=(mw.getCurrentFrame():getTitle():match('/sandbox')or'');-- when called from a sandbox template or module load sandbox data and sandbox configuration
locallang_data=mw.loadData('Modul:Lang/data'..sandbox);-- language name override and transliteration tool-tip tables
locallang_name_table=lang_data.lang_name_table;-- language codes, names, regions, scripts, suppressed scripts
locallang_table=lang_data.lang_name_table.lang;
locallang_dep_table=lang_data.lang_name_table.lang_dep;
localscript_table=lang_data.lang_name_table.script;
localregion_table=lang_data.lang_name_table.region;
localvariant_table=lang_data.lang_name_table.variant;
localsuppressed_table=lang_data.lang_name_table.suppressed;
localoverride_table=lang_data.override;
localsynonym_table=mw.loadData('Modul:Lang/ISO 639 synonyms');-- ISO 639-2/639-2T code translation to 639-1 code
localcfg=mw.loadData('Modul:Lang/configuration'..sandbox);-- for internationalization
localis_latn_data=mw.loadData('Modul:Lang/data/is latn data');
localsizeof_ranges_t=is_latn_data.sizeof_ranges_t;
localnamespace=mw.title.getCurrentTitle().namespace;-- used for categorization
localcontent_lang=mw.language.getContentLanguage();
localthis_wiki_lang_tag=content_lang.code;-- get this wiki's language tag
localthis_wiki_lang_dir=content_lang:getDir();-- get this wiki's language direction
localinitial_style_state;-- set by lang_xx_normal() and lang_xx_italic()
localmaint_cats={};-- maintenance categories go here
localmaint_msgs={};-- and their messages go here
--[[--------------------------< M A K E _ E R R O R _ S P A N >--------------------------------------------------
]]
localfunctionmake_error_span(template,msg)
returntable.concat({'<span style="color:var(--color-error,#d33">',cfg.misc_text_t.error,': ',template,msg,'</span>'})
end
--[[--------------------------< S U B S T I T U T E >----------------------------------------------------------
Substitutes $1, $2, etc in <message> with data from <data_t>. Returns plain-text substituted string when
<data_t> not nil; returns <message> else.
]]
localfunctionsubstitute(message,data_t)
returndata_tandmw.message.newRawMessage(message,data_t):plain()ormessage;
end
--[[--------------------------< 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.
]]
localfunctionmake_error_msg(msg,args_t,template)
localcategory;
localtext;-- handle the oddity that is {{langx}}
ifcfg.templates_t.langxx==templatethen
text=args_t.textorargs_t[1];-- for {{lang-xx}}
else
text=args_t.textorargs_t[2];-- for {{lang}}, {{langx}}, and {{transliteration}}
end
ifcfg.templates_t.transliteration==templatethen
category=cfg.make_error_msg_t.xlit_err_cat;
else
category=cfg.make_error_msg_t.lang_err_cat;
end
localcategory_link=((0==namespaceor10==namespace)andnotargs_t.nocat)andsubstitute('[[Kategori:$1]]',{category})or'';
returnsubstitute('[$1] <span style="color:var(--color-error,#d33)">$2: &#x7B;{$3}}: $4 ([[:Kategori:$5|$6]])</span>$7',-- &#x7B; prevents template name from being treated as a template call in certain situations
{
textorcfg.make_error_msg_t.undefined,
cfg.misc_text_t.error,
template,
msg,
category,
cfg.misc_text_t.help,
category_link
})
end
--[[--------------------------< P A R A M E T E R _ V A L I D A T E >------------------------------------------
]]
localfunctionparameter_validate(args_t,template)
localerr_msg=cfg.parameter_validate_t.invalid_param;
ifcfg.templates_t.lang==templatethen-- for {{lang}}
forparam,_inpairs(args_t)do
ifnotcfg.known_params_t.params_lang_t[param]and-- unique {{lang}} parameters
notcfg.known_params_t.common_params_all_t[param]then-- common to all
returnsubstitute(err_msg,{param});-- <param> not found so abandon
end
end
elseifcfg.templates_t.langx==templatethen-- for {{langx}}
forparam,_inpairs(args_t)do
ifnotcfg.known_params_t.params_langx_t[param]and-- unique {{langx}} parameters
notcfg.known_params_t.params_x_t[param]and-- common to {{langx}} and {{lang-xx}}
notcfg.known_params_t.common_params_all_t[param]then-- common to all
returnsubstitute(err_msg,{param});-- <param> not found so abandon
end
end
elseifcfg.templates_t.langxx==templatethen-- for {{lang-xx}}
forparam,_inpairs(args_t)do
ifnotcfg.known_params_t.params_lang_xx_t[param]and-- unique {{lang-xx}} parameters
notcfg.known_params_t.params_x_t[param]and-- common to {{langx}} and {{lang-xx}}
notcfg.known_params_t.common_params_all_t[param]then-- common to all
returnsubstitute(err_msg,{param});-- <param> not found so abandon
end
end
end
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.
]]
localfunctionis_set(var)
returnnot(var==nilorvar=='');
end
--[[--------------------------< 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 markup
in args.text.  Like |italic=unset, |italic=invert disables automatic italic markup.  Individual leading/trailing
apostrophes are converted to their HTML numeric entity equivalent so that the new italic markup doesn't become
bold 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.
]]
localfunctioninvert_italics(source)
localinvert_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
};
localseg={};
source=source:gsub("%f[\']\'%f[^\']",'&#39;');-- protect single quote marks from being interpreted as bold markup
seg[1]=source:match('^(\'\'+%f[^\']).+')or'';-- get leading markup, if any; ignore single quote
seg[3]=source:match('.+(%f[\']\'\'+)$')or'';-- get trailing markup, if any; ignore single quote
if''~=seg[1]and''~=seg[3]then-- extract the 'text' 
seg[2]=source:match('^\'\'+%f[^\'](.+)%f[\']\'\'+$')-- from between leading and trailing markup
elseif''~=seg[1]then
seg[2]=source:match('^\'\'+%f[^\'](.+)%f[\']\'\'+')-- following leading markup (updated logic)
elseif''~=seg[3]then
seg[2]=source:match('(.+)%f[\']\'\'+$')-- preceding trailing markup
else
seg[2]=source-- when there is no markup
end
seg[1]=invert_pattern_table[seg[1]]orseg[1];-- replace leading markup according to pattern table
seg[3]=invert_pattern_table[seg[3]]orseg[3];-- replace leading markup according to pattern table
returntable.concat(seg);-- put it all back together and done
end
--[[--------------------------< 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 acceptable 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 unacceptable 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 xlit function to set args.italic according to the template's
defined default ('inherit' for {{lang}}, 'inherit' or 'italic' for {{lang-??}} depending on
the individual template's requirements, 'italic' for {{transliteration}}) or to the value appropriate to |script=, if set ({{lang}}
and {{lang-??}} only).
Accepted values and the values that this function returns are are:
	nil		-	when |italic= absent or not set; returns nil
	default	-	for completeness, should rarely if ever be used; returns nil
	yes		-	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'
]]
localfunctionvalidate_italic(args)
localproperties={[cfg.keywords_t.affirmative]='italic',[cfg.keywords_t.negative]='normal',[cfg.keywords_t.unset]='inherit',[cfg.keywords_t.invert]='invert',[cfg.keywords_t.default]=nil};
localcount=0
for_,arginpairs{'italic','italics','i'}do
ifargs[arg]then
count=count+1
end
end
ifcount>1then-- return nil and an error message if more than one is set 
returnnil,cfg.validate_italic_t.multi_italic;
end
returnproperties[args.italicorargs.italicsorargs.i],nil;-- return an appropriate value and a nil error message
end
--[=[--------------------------< V A L I D A T E _ C A T _ A R G S >----------------------------------------------------------
Default behavior of the {{lang}} and {{lang-??}} templates is to add categorization when the templates are used in main space.
This default functionality may be suppressed by setting |nocat=yes or |cat=no.  This function selects one of these two parameters
to control categorization.
Because having two parameters with 'opposite' names and 'opposite' values is confusing, this function accepts only affirmative
values for |nocat= and only negative values for |cat=; in both cases the 'other' sense (and non-sense) is not accepted and the
parameter is treated as if it were not set in the template.
Sets args.nocat to true if categorization is to be turned off; to nil if the default behavior should apply.
Accepted values for |nocat= are the text strings:
	'yes', 'y', 'true', 't', on, '1'		-- [[Modul:Yesno]] returns logical true for all of these; false or nil else
for |cat=
	'no', 'n', 'false', 'f', 'off', '0'		-- [[Modul:Yesno]] returns logical false for all of these; true or nil else
]=]
localfunctionvalidate_cat_args(args)
ifnot(args.nocatorargs.cat)then-- both are nil, so categorize
return;
end
iffalse==yesno(args.cat)ortrue==yesno(args.nocat)then
args.nocat=true;-- set to true when args.nocat is affirmative; nil else (as if the parameter were not set in the template)
else-- args.nocat is the parameter actually used.
args.nocat=nil;
end
end
--[[--------------------------< I N _ A R R A Y >--------------------------------------------------------------
Whether needle is in haystack.
]]
localfunctionin_array(needle,haystack)
ifneedle==nilthen
returnfalse;
end
forn,vinipairs(haystack)do
ifv==needlethen
returnn;
end
end
returnfalse;
end
--[[--------------------------< F O R M A T _ I E T F _ T A G >------------------------------------------------
Prettify IETF tags to use recommended subtag formats:
	code: lower case
	script: sentence case
	region: upper case
	variant: lower case
	private: lower case prefixed with -x-
]]
localfunctionformat_ietf_tag(code,script,region,variant,private)
localout={};
ifis_set(private)then
returntable.concat({code:lower(),'x',private:lower()},'-');-- if private, all other tags ignored
end
table.insert(out,code:lower());
ifis_set(script)then
script=script:lower():gsub('^%a',string.upper);
table.insert(out,script);
end
ifis_set(region)then
table.insert(out,region:upper());
end
ifis_set(variant)then
table.insert(out,variant:lower());
end
returntable.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 code
	script subtag - four character IANA script code
	region subtag - two-letter or three digit IANA region code
	variant subtag - four digit or 5-8 alnum variant code; only one variant subtag supported
	private subtag - x- followed by 1-8 alnum private code; only supported with the primary language tag
in any one of these forms
	lang					lang-variant
	lang-script				lang-script-variant
	lang-region				lang-region-variant
	lang-script-region		lang-script-region-variant
	lang-x-private	
each of lang, script, region, variant, and private, when used, must be valid.
Languages with both two- and three-character code synonyms are promoted to the two-character synonym because
the IANA registry file omits the synonymous three-character code; we cannot depend on browsers understanding
the synonymous three-character codes in the lang= attribute.
For {{lang-??}} 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; all lower case.  Valid parts are returned as themselves; omitted parts are returned as empty strings, invalid
parts 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.
]]
localfunctionget_ietf_parts(source,args_script,args_region,args_variant)
localcode,script,region,variant,private;-- IETF tag parts
ifnotis_set(source)then
returnnil,nil,nil,nil,nil,cfg.get_ietf_parts_t.missing_lang_tag;
end
localpattern={-- table of tables holding acceptable IETF tag patterns and short names of the IETF part captured by the pattern
{'^(%a%a%a?)%-(%a%a%a%a)%-(%a%a)%-(%d%d%d%d)$','s','r','v'},-- 1 -  ll-Ssss-RR-variant (where variant is 4 digits)
{'^(%a%a%a?)%-(%a%a%a%a)%-(%d%d%d)%-(%d%d%d%d)$','s','r','v'},-- 2 -  ll-Ssss-DDD-variant (where region is 3 digits; variant is 4 digits)
{'^(%a%a%a?)%-(%a%a%a%a)%-(%a%a)%-(%w%w%w%w%w%w?%w?%w?)$','s','r','v'},-- 3 -  ll-Ssss-RR-variant (where variant is 5-8 alnum characters)
{'^(%a%a%a?)%-(%a%a%a%a)%-(%d%d%d)%-(%w%w%w%w%w%w?%w?%w?)$','s','r','v'},-- 4 -  ll-Ssss-DDD-variant (where region is 3 digits; variant is 5-8 alnum characters)
{'^(%a%a%a?)%-(%a%a%a%a)%-(%d%d%d%d)$','s','v'},-- 5 -  ll-Ssss-variant (where variant is 4 digits)
{'^(%a%a%a?)%-(%a%a%a%a)%-(%w%w%w%w%w%w?%w?%w?)$','s','v'},-- 6 -  ll-Ssss-variant (where variant is 5-8 alnum characters)
{'^(%a%a%a?)%-(%a%a)%-(%d%d%d%d)$','r','v'},-- 7 -  ll-RR-variant (where variant is 4 digits)
{'^(%a%a%a?)%-(%d%d%d)%-(%d%d%d%d)$','r','v'},-- 8 -  ll-DDD-variant (where region is 3 digits; variant is 4 digits)
{'^(%a%a%a?)%-(%a%a)%-(%w%w%w%w%w%w?%w?%w?)$','r','v'},-- 9 -  ll-RR-variant (where variant is 5-8 alnum characters)
{'^(%a%a%a?)%-(%d%d%d)%-(%w%w%w%w%w%w?%w?%w?)$','r','v'},-- 10 - ll-DDD-variant (where region is 3 digits; variant is 5-8 alnum characters)
{'^(%a%a%a?)%-(%d%d%d%d)$','v'},-- 11 - ll-variant (where variant is 4 digits)
{'^(%a%a%a?)%-(%w%w%w%w%w%w?%w?%w?)$','v'},-- 12 - ll-variant (where variant is 5-8 alnum characters)
{'^(%a%a%a?)%-(%a%a%a%a)%-(%a%a)$','s','r'},-- 13 - ll-Ssss-RR
{'^(%a%a%a?)%-(%a%a%a%a)%-(%d%d%d)$','s','r'},-- 14 - ll-Ssss-DDD (region is 3 digits)
{'^(%a%a%a?)%-(%a%a%a%a)$','s'},-- 15 - ll-Ssss
{'^(%a%a%a?)%-(%a%a)$','r'},-- 16 - ll-RR
{'^(%a%a%a?)%-(%d%d%d)$','r'},-- 17 - ll-DDD (region is 3 digits)
{'^(%a%a%a?)$'},-- 18 - ll
{'^(%a%a%a?)%-x%-(%w%w?%w?%w?%w?%w?%w?%w?)$','p'},-- 19 - ll-x-pppppppp (private is 1-8 alnum characters)
}
localt={};-- table of captures; serves as a translator between captured IETF tag parts and named variables
fori,vinipairs(pattern)do-- spin through the pattern table looking for a match
localc1,c2,c3,c4;-- captures in the 'pattern' from the pattern table go here
c1,c2,c3,c4=source:match(pattern[i][1]);-- one or more captures set if source matches pattern[i])
ifc1then-- c1 always set on match
code=c1;-- first capture is always code
t={
[pattern[i][2]or'x']=c2,-- fill the table of captures with the rest of the captures
[pattern[i][3]or'x']=c3,-- take index names from pattern table and assign sequential captures
[pattern[i][4]or'x']=c4,-- index name may be nil in pattern[i] table so "or 'x'" spoofs a name for this index in this table
};
script=t.sor'';-- translate table contents to named variables;
region=t.ror'';-- absent table entries are nil so set named IETF parts to empty string for concatenation
variant=t.vor'';
private=t.por'';
break;-- and done
end
end
ifnotcodethen
returnnil,nil,nil,nil,nil,substitute(cfg.get_ietf_parts_t.unrecog_tag,{source});-- don't know what we got but it is malformed
end
code=code:lower();-- ensure that we use and return lower case version of this
ifnot(override_table[code]orlang_table[code]orsynonym_table[code]orlang_dep_table[code])then
returnnil,nil,nil,nil,nil,substitute(cfg.get_ietf_parts_t.unrecog_code,{code});-- invalid language code, don't know about the others (don't care?)
end
ifsynonym_table[code]then-- if 639-2/639-2T code has a 639-1 synonym
table.insert(maint_cats,substitute(cfg.get_ietf_parts_t.maint_promo_cat,{code}));
table.insert(maint_msgs,substitute(cfg.get_ietf_parts_t.maint_promo_msg,{code,synonym_table[code]}));
code=synonym_table[code];-- use the synonym
end
ifis_set(script)then
ifis_set(args_script)then
returncode,nil,nil,nil,nil,cfg.get_ietf_parts_t.redundant_scr;-- both code with script and |script= not allowed
end
else
script=args_scriptor'';-- use args.script if provided
end
ifis_set(script)then
script=script:lower();-- ensure that we use and return lower case version of this
ifnotscript_table[script]then
returncode,nil,nil,nil,nil,substitute(cfg.get_ietf_parts_t.unrecog_scr_code,{script,code});-- language code OK, invalid script, don't know about the others (don't care?)
end
end
ifsuppressed_table[script]then-- ensure that code-script does not use a suppressed script
ifin_array(code,suppressed_table[script])then
returncode,nil,nil,nil,nil,substitute(cfg.get_ietf_parts_t.script_code,{script,code});-- language code OK, script is suppressed for this code
end
end
ifis_set(region)then
ifis_set(args_region)then
returncode,nil,nil,nil,nil,cfg.get_ietf_parts_t.redundant_reg;-- both code with region and |region= not allowed
end
else
region=args_regionor'';-- use args.region if provided
end
ifis_set(region)then
region=region:lower();-- ensure that we use and return lower case version of this
ifnotregion_table[region]then
returncode,script,nil,nil,nil,substitute(cfg.get_ietf_parts_t.unrecog_reg_code,{region,code});
end
end
ifis_set(variant)then
ifis_set(args_variant)then
returncode,nil,nil,nil,nil,cfg.get_ietf_parts_t.redundant_var;-- both code with variant and |variant= not allowed
end
else
variant=args_variantor'';-- use args.variant if provided
end
ifis_set(variant)then
variant=variant:lower();-- ensure that we use and return lower case version of this
ifnotvariant_table[variant]then-- make sure variant is valid
returncode,script,region,nil,nil,substitute(cfg.get_ietf_parts_t.unrecog_var,{variant});
end-- does this duplicate/replace tests in lang() and lang_xx()?
ifis_set(script)then-- if script set it must be part of the 'prefix'
ifnotin_array(table.concat({code,'-',script}),variant_table[variant]['prefixes'])then
returncode,script,region,nil,nil,substitute(cfg.get_ietf_parts_t.unrecog_var_code_scr,{variant,code,script});
end
elseifis_set(region)then-- if region set, there are some prefixes that require lang code and region (en-CA-newfound)
ifnotin_array(code,variant_table[variant]['prefixes'])then-- first see if lang code is all that's required (en-oxendict though en-GB-oxendict is preferred)
ifnotin_array(table.concat({code,'-',region}),variant_table[variant]['prefixes'])then-- now try for lang code and region (en-CA-newfound)
returncode,script,region,nil,nil,substitute(cfg.get_ietf_parts_t.unrecog_var_code_reg,{variant,code,region});
end
end
else-- cheap way to determine if there are prefixes; fonipa and others don't have prefixes; # operator always returns 0
ifvariant_table[variant]['prefixes'][1]andnotin_array(code,variant_table[variant]['prefixes'])then
returncode,script,region,nil,nil,substitute(cfg.get_ietf_parts_t.unrecog_var_code,{variant,code});
end
end
end
ifis_set(private)then
private=private:lower();-- ensure that we use and return lower case version of this
ifnotoverride_table[table.concat({code,'-x-',private})]then-- make sure private tag is valid; note that index 
returncode,script,region,nil,nil,substitute(cfg.get_ietf_parts_t.unrecog_pri,{private});
end
end
returncode,script,region,variant,private,nil;-- return the good bits; make sure that msg is nil
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 only
link is provided, returns a wikilink in the form [[L]]; if neither are provided or link is omitted, returns an
empty string.
]=]
localfunctionmake_wikilink(link,display)
ifis_set(link)then
ifis_set(display)then
returntable.concat({'[[',link,'|',display,']]'});
else
returntable.concat({'[[',link,']]'});
end
else
return'';
end
end
--[[--------------------------< D I V _ M A R K U P _ A D D >--------------------------------------------------
Adds <i> and </i> tags to list-item text or to implied <p>..</p> text. Mixed not supported.
]]
localfunctiondiv_markup_add(text,style)
iftext:find('^\n[%*:;#]')then-- look for list markup; list markup must begin at start of text
if'italic'==stylethen
returntext:gsub('(\n[%*:;#]+)([^\n]+)','%1<i>%2</i>');-- insert italic markup at each list item
else
returntext;
end
end
iftext:find('\n+')then-- look for any number of \n characters in text
text=text:gsub('([^\n])\n([^\n])','%1 %2');-- replace single newline characters with a space character which mimics MediaWiki
if'italic'==stylethen
text=text:gsub('[^\n]+','<p><i>%1</i></p>');-- insert p and italic markup tags at each implied p (two or more consecutive '\n\n' sequences)
else
text=text:gsub('[^\n]+','<p>%1</p>');-- insert p markup at each implied p
text=text:gsub('\n','');-- strip newline characters
end
end
returntext;
end
--[[--------------------------< T I T L E _ W R A P P E R _ M A K E >------------------------------------------
Makes a <span title="<title text>"><content_text></span> or <div title="<title text>"><content_text></div> where
<title text> is in the tool-tip in the wiki's local language and <content_text> is non-local-language text in
HTML markup.  This because the lang= attribute applies to the content of its enclosing tag.
<tag> holds a string 'div' or 'span' used to choose the correct wrapping tag.
]]
localfunctiontitle_wrapper_make(title_text,content_text,tag)
localwrapper_t={};
table.insert(wrapper_t,table.concat({'<',tag}));-- open opening wrapper tag
table.insert(wrapper_t,' title=\"');-- begin title attribute
table.insert(wrapper_t,title_text);-- add <title_text>
table.insert(wrapper_t,'\">');-- end title attribute and close opening wrapper tag
table.insert(wrapper_t,content_text);-- add <content_text>
table.insert(wrapper_t,table.concat({'</',tag,'>'}));-- add closing wrapper tag
returntable.concat(wrapper_t);-- make a big string and done
end
--[[--------------------------< M A K E _ T E X T _ H T M L >--------------------------------------------------
Add the HTML markup to text according to the type of content that it is: <span> or <i> tags for inline content or
<div> tags for block content
The lang= attribute also applies to the content of the tag where it is placed so this is wrong because 'Spanish
language text' is English:
	<i lang="es" title="Spanish language text">casa</i>
should be:
	<span title="Spanish language text"><i lang="es">casa</i></span>
or for <div>...</div>:
	<div title="Spanish language text"><div lang="es"><spanish-language-text></div></div>
]]
localfunctionmake_text_html(code,text,tag,rtl,style,size,language)
localhtml_t={};
localstyle_added='';
localwrapper_tag=tag;-- <tag> gets modified so save a copy for use when/if we create a wrapper span or div
iftext:match('^%*')then
table.insert(html_t,'&#42;');-- move proto language text prefix outside of italic markup if any; use numeric entity because plain splat confuses MediaWiki
text=text:gsub('^%*','');-- remove the splat from the text
end
if'span'==tagthen-- default HTML tag for inline content
if'italic'==stylethen-- but if italic
tag='i';-- change to <i> tags
end
else-- must be div so go
text=div_markup_add(text,style);-- handle implied <p>, implied <p> with <i>, and list markup (*;:#) with <i>
end
table.insert(html_t,table.concat({'<',tag}));-- open the <i>, <span>, or <div> HTML tag
code=code:gsub('%-x%-.*','');-- strip private use subtag from code tag because meaningless outside of Wikipedia
table.insert(html_t,table.concat({' lang="',code,'\"'}));-- add language attribute
if(rtlorunicode.is_rtl(text))and('ltr'==this_wiki_lang_dir)then-- text is right-to-left on a left-to-right wiki
table.insert(html_t,' dir="rtl"');-- add direction attribute for right-to-left languages
elseifnot(rtlorunicode.is_rtl(text))and('rtl'==this_wiki_lang_dir)then-- text is left-to-right on a right-to-left wiki
table.insert(html_t,' dir="ltr"');-- add direction attribute for left-to-right languages
end
if'normal'==stylethen-- when |italic=no
table.insert(html_t,' style=\"font-style: normal;');-- override external markup, if any
style_added='\"';-- remember that style attribute added and is not yet closed
end
ifis_set(size)then-- when |size=<something>
ifis_set(style_added)then
table.insert(html_t,table.concat({' font-size: ',size,';'}));-- add when style attribute already inserted
else
table.insert(html_t,table.concat({' style=\"font-size: ',size,';'}));-- create style attribute
style_added='\"';-- remember that style attribute added and is not yet closed
end
end
table.insert(html_t,table.concat({style_added,'>'}));-- close the opening HTML tag
table.insert(html_t,text);-- insert the text
table.insert(html_t,table.concat({'</',tag,'>'}));-- close the 'text' <i>, <span>, or <div> HTML tag
ifis_set(language)then-- create a <title_text> string for the title= attribute in a wrapper span or div
localtitle_text;
if'zxx'==codethen-- special case for this tag 'no linguistic content'
title_text=substitute('$1 $2',{cfg.make_text_html_t.zxx,language});-- not a language so don't use 'language' in title text
elseifmw.ustring.find(language,'languages',1,true)then
title_text=substitute('$1 $2',{cfg.make_text_html_t.collective,language});-- for collective languages
else
title_text=substitute('$1 $2',{cfg.make_text_html_t.individual,language});-- for individual languages
end
returntitle_wrapper_make(title_text,table.concat(html_t),wrapper_tag);
else
returntable.concat(html_t);
end
end
--[=[-------------------------< M A K E _ C A T E G O R Y >----------------------------------------------------
For individual language, <language>, returns:
	[[Category:Articles containing <language>-language text]]
For English:
	[[Category:Articles containing explicitly cited English-language text]]
For ISO 639-2 collective languages (and for 639-1a bh):
	[[Category:Articles with text in <language> lnguages]]
]=]
localfunctionmake_category(code,language_name,nocat,name_get)
if((0~=namespace)ornocat)andnotname_getthen-- only categorize in article space
return'';-- return empty string for concatenation
end
ifmw.ustring.find(language_name,'languages',1,true)then
returnsubstitute('[[$1 $2]]',{cfg.make_category_t.collective_cat,language_name});
end
ifthis_wiki_lang_tag==codethen
returnsubstitute('[[$1 $2 $3 $4]]',{-- unique category name for the local language
cfg.make_category_t.cat_prefix,
cfg.make_category_t.explicit_cat,
language_name,
cfg.make_category_t.cat_postfix,
});
else
returnsubstitute('[[$1 $2 $3]]',{-- category for individual languages
cfg.make_category_t.cat_prefix,
language_name,
cfg.make_category_t.cat_postfix,
});
end
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 string.
The value |script= is not used in {{transliteration}} for this purpose; instead it uses |code.  Because language scripts
are listed in the {{transliteration}} switches they are included in the data tables.  The script parameter is introduced
at {{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 renamed
to be |translit-script= (in this function, tscript).
This function is used by both lang_xx() and xlit()
	lang_xx() always provides code, language_name, and translit; may provide tscript; never provides style
	xlit() always provides language_name, translit, and one of code or tscript, never both; always provides style
For {{transliteration}}, style only applies when a language code is provided.
]]
localfunctionmake_translit(code,language_name,translit,std,tscript,style,engvar)
localtitle_t=lang_data.translit_title_table;-- table of transliteration standards and the language codes and scripts that apply to those standards
localtitle_text='';-- tool tip text for title= attribute
std=stdandstd:lower();-- lower case for table indexing
ifnotis_set(std)andnotis_set(tscript)then-- when neither standard nor script specified
title_text=language_name;-- write a generic tool tip
ifnotmw.ustring.find(language_name,'languages',1,true)then-- collective language names (plural 'languages' is part of the name)
title_text=substitute('$1-$2',{title_text,cfg.misc_text_t.language});-- skip this text (individual and macro languages only)
end
title_text=substitute('$1 $2',{title_text,mw.ustring.lower(cfg.engvar_t[engvar]['romanisz_lc'])});-- finish the tool tip; use romanization when neither script nor standard supplied
elseifis_set(std)andis_set(tscript)then-- when both are specified
iftitle_t[std]then-- and if standard is legitimate
iftitle_t[std][tscript]then-- and if script for that standard is legitimate
ifscript_table[tscript]then
title_text=substitute('$1$2 ($3 $4) $5',{-- add the appropriate text to the tool tip
title_text,
title_t[std][tscript:lower()],
script_table[tscript],
cfg.make_translit_t.script,
cfg.make_translit_t.transliteration,
});
else
title_text=title_text..title_t[std]['default'];-- use the default if script not in std table; TODO: maint cat? error message because script not found for this standard?
end
else
title_text=title_text..title_t[std]['default'];-- use the default if script not in std table; TODO: maint cat? error message because script not found for this standard?
end
else
return'';-- invalid standard, setup for error message
end
elseifis_set(std)then-- translit-script not set, use language code
ifnottitle_t[std]thenreturn'';end-- invalid standard, setup for error message
iftitle_t[std][code]then-- if language code is in the table (xlit may not provide a language code)
title_text=substitute('$1$2 ($3 $4) $5',{-- add the appropriate text to the tool tip
title_text,
title_t[std][code:lower()],
language_name,
cfg.misc_text_t.language,
cfg.make_translit_t.transliteration,
});
else-- code doesn't match
title_text=title_text..title_t[std]['default'];-- so use the standard's default
end
else-- here if translit-script set but translit-std not set
iftitle_t['no_std'][tscript]then
title_text=title_text..title_t['no_std'][tscript];-- use translit-script if set
elseiftitle_t['no_std'][code]then
title_text=title_text..title_t['no_std'][code];-- use language code
else
ifis_set(tscript)then
title_text=substitute('$1$2-$3 $4',{-- write a script tool tip
title_text,
language_name,
cfg.make_translit_t.script,
cfg.make_translit_t.transliteration,
});
elseifis_set(code)then
ifnotmw.ustring.find(language_name,'languages',1,true)then-- collective language names (plural 'languages' is part of the name)
title_text=substitute('$1-$2',{-- skip this text (individual and macro languages only)
title_text,
cfg.misc_text_t.language,
});
end
title_text=substitute('$1 $2',{-- finish the tool tip
title_text,
cfg.make_translit_t.transliteration,
});
else
title_text=substitute('$1 $2',{-- generic tool tip (can we ever get here?)
title_text,
cfg.make_translit_t.transliteration,
});
end
end
end
localtag
ifis_set(code)then-- when a language code is provided (always with {{lang-??}} templates, not always with {{transliteration}})
code=code:match('^(%a%a%a?)');-- strip all subtags leaving only the language subtag
ifnotstylethen-- nil for the default italic style
tag='<i lang="%s-Latn">%s</i>'
else
tag='<span style="font-style: %s" lang="%s-Latn">%s</span>'-- non-standard style, construct a span tag for it
tag=string.format(tag,style,"%s","%s")
end
tag=string.format(tag,code,"%s")
else
tag='<span>%s</span>'-- when no language code: no lang= attribute, not italic ({{transliteration}} only)
end
tag=string.format(tag,translit)-- add the translit text
if''==title_textthen-- when there is no need for a tool-tip
returntag;-- done
else
title_text=cfg.engvar_sel_t.gb==engvarandtitle_text:gsub('([Rr]omani)z','%1s')ortitle_text;-- gb eng when engvar specifies gb eng; us eng else
returntitle_wrapper_make(title_text,tag,'span');-- wrap with a tool-tip span and done
end
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 an
error 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.text
either as ''itself'' or as '''''bold italic''''' unless |italic=unset or |italic=invert.
]]
localfunctionvalidate_text(template,args)
ifnotis_set(args.text)then
returnmake_error_msg(cfg.validate_text_t.no_text,args,template);
end
ifargs.text:find("%f[\']\'\'\'\'%f[^\']")orargs.text:find("\'\'\'\'\'[\']+")then-- because we're looking, look for 4 appostrophes or 6+ appostrophes
returnmake_error_msg(cfg.validate_text_t.malformed_markup,args,template);
end
localstyle=args.italic;
if(cfg.keywords_t.unset~=style)and(cfg.keywords_t.invert~=style)then
ifargs.text:find("%f[\']\'\'%f[^\']")orargs.text:find("%f[\']\'\'\'\'\'%f[^\']")then-- italic but not bold, or bold italic
returnmake_error_msg(cfg.validate_text_t.italic_markup,args,template);
end
end
end
--[[--------------------------< R E N D E R _ M A I N T >------------------------------------------------------
Render mainenance messages and categories.
]]
localfunctionrender_maint(nocat)
localmaint={};
if0<#maint_msgsthen-- when there are maintenance messages
table.insert(maint,table.concat({'<span class="lang-comment" style="font-style: normal; display: none; color: #33aa33; margin-left: 0.3em;">'}));-- opening <span> tag
for_,msginipairs(maint_msgs)do
table.insert(maint,table.concat({msg,' '}));-- add message strings
end
table.insert(maint,'</span>');-- close the span
end
if(0<#maint_cats)and(0==namespace)andnotnocatthen-- when there are maintenance categories; article namespace only
for_,catinipairs(maint_cats)do
table.insert(maint,table.concat({'[[Kategori:',cat,']]'}));-- format and add the categories
end
end
returntable.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_html() so that a splat
will be rendered outside of italic markup (if used). If the first character in text here is already a splat, we
do nothing.
proto_param is boolean or nil; true adds splat prefix regardless of language name; false removes and inhibits
regardless of language name; nil does nothing; presumes that the value in text is correct but removes extra splac.
]]
localfunctionproto_prefix(text,language_name,proto_param)
iffalse==proto_paramthen-- when forced by |proto=no
returntext:gsub('^%**','');-- return text without splat prefix regardless of language name or existing splat prefix in text
elseif(language_name:find('^Proto%-')or(true==proto_param))then-- language is a proto or forced by |proto=yes
returntext:gsub('^%**','*');-- prefix proto-language text with a splat; also removes duplicate prefixing splats
end
returntext:gsub('^%*+','*');-- return text unmolested except multiple splats reduced to one splat
end
--[[--------------------------< H A S _ P O E M _ T A G >------------------------------------------------------
Looks for a poem strip marker in text; returns true when found; false else.
Auto-italic detection disabled when text has poem stripmarker because it is not possible for this code to know
the content that will replace the stripmarker.
]]
localfunctionhas_poem_tag(text)
returntext:find('\127[^\127]*UNIQ%-%-poem%-[%a%d]+%-QINU[^\127]*\127')andtrueorfalse;
end
--[[--------------------------< H T M L _ T A G _ S E L E C T >------------------------------------------------
Inspects content of and selectively trims text.  Returns text and the name of an appropriate HTML tag for text.
If text contains:
	\n\n	text has implied <p>..</p> tags - trim leading and trailing whitespace and return 
If text begins with list markup:
	\n*		unordered
	\n;		definition
	\n:		definition
	\n#		ordered
trim all leading whitespace except  \n and trim all trailing whitespace
If text contains <poem>...</poem> stripmarker, return text unmodified and choose <div>..</div> tags because 
the stripmarker is replaced with text wrapped in <div>..</div> tags.
If the text contains any actual <div>...</div> tags, then it's again returned unmodified and <div>...</div>
tags are used to wrap it, to prevent div/span inversion.
]]
localfunctionhtml_tag_select(text)
localtag;
ifhas_poem_tag(text)then-- contains poem stripmarker (we can't know the content of that)
tag='div';-- poem replacement is in div tags so lang must use div tags
elseiftext:find('<div')then-- reductive; if the text contains a div tag, we must use div tags
tag='div';
elseifmw.text.trim(text):find('\n\n+')then-- contains implied p tags
text=mw.text.trim(text);-- trim leading and trailing whitespace characters
tag='div';-- must be div because span may not contain p tags (added later by MediaWiki); poem replacement is in div tags
elseiftext:find('\n[%*:;%#]')then-- if text has list markup
text=text:gsub('^[\t\r\f ]*',''):gsub('%s*$','');-- trim all whitespace except leading newline character '\n'
tag='div';-- must be div because span may not contain ul, dd, dl, ol tags (added later by MediaWiki)
else
text=mw.text.trim(text);-- plain text
tag='span';-- so span is fine
end
returntext,tag;
end
--[[--------------------------< V A L I D A T E _ P R O T O >--------------------------------------------------
Validates value assigned to |proto=; permitted values are yes and no; yes returns as true, no returns as false,
empty string (or parameter omitted) returns as nil; any other value returns nil with <proto_param> as second
return value for use in error message.
]]
localfunctionvalidate_proto(proto_param)
ifcfg.keywords_t.affirmative==proto_paramthen
returntrue;
elseifcfg.keywords_t.negative==proto_paramthen
returnfalse;
elseifis_set(proto_param)then
returnnil,proto_param;-- |proto= something other than 'yes' or 'no'
else
returnnil;-- missing or empty
end
end
--[[--------------------------< L A N G U A G E _ N A M E _ G E T >--------------------------------------------
Common function to return language name from the data set according to IETF tag.
Returns language name if found in data tables; nil else.
]]
localfunctionlanguage_name_get(ietf,code,cat)
ietf=ietf:lower();-- ietf:lower() because format_ietf_tag() returns mixed case
localname;-- remains nil if not found
ifoverride_table[ietf]then-- look for whole IETF tag in override table
name=override_table[ietf];
elseifoverride_table[code]then-- not there so try basic language tag
name=override_table[code];
elseiflang_table[code]then-- shift to IANA active tag/name table
name=lang_table[code];
elseiflang_dep_table[code]then-- try the IANA deprecated tag/name table
name=lang_dep_table[code];
end
iflang_dep_table[code]andcatthen-- because deprecated code may have been overridden to en.wiki preferred name
table.insert(maint_cats,substitute(cfg.language_name_get_t.deprecated_cat,{code}));
table.insert(maint_msgs,substitute(cfg.language_name_get_t.deprecated_msg,{code}));
end
returnname;-- name from data tables or nil
end
--[[--------------------------< T E X T _ S C R I P T _ M A T C H _ T E S T >----------------------------------
IETF script subtag should match the script of the <text>.  This module does not attempt to know all scripts and
what they look like.  It does know what Latn script looks like so when <text> is written using other than the Latn
script, the IETF script subtag, if present, should not be Latn.
Conversely, when <text> is written using the Latn script, the IETF script subtag, if present, should be Latn.
For the purposes of this test, Latf (Fraktur) and Latg (Gaelic) are considered to be equivalent to Latn because
unicode treats these two scripts as font-specific variants of Latn.
Returns an error message when mismatch detected; nil else.
]]
localfunctiontext_script_match_test(script,is_latn_text,pos,char)
localscripts_t={['latf']=true,['latg']=true,['latn']=true};-- unicode 'latn' scripts; 'latf' and 'latg' are font variants so there are no Fraktur or Gaelic codepoints
ifis_set(script)then-- don't bother with the rest of this if <script> is nil or empty string
script=script:lower();-- lower case to index into <scripts_t>
ifis_latn_textthen-- when text is wholly Latn script
ifnotscripts_t[script]then-- but a non-Latn script is specified
returncfg.text_script_match_test_t.latn_txt_mismatch;-- emit an error message
end
else-- when text is not wholly Latn script
ifscripts_t[script]then-- but a Latn script is specified
returnsubstitute(cfg.text_script_match_test_t.latn_scr_mismatch,{pos,char});-- emit an error message with position of first offending character
end
end
end
end
--[[--------------------------< B I N A R Y _ S E A R C H >---------------------------------------------------
conducts a binary search of <ranges_t> for a sub-range that holds <target>.
returns boolean true if a sub-range holding <target> is found; boolean false else.
]]
localfunctionbinary_search(target,ranges_t)
localidx_bot=1;-- initialize to index of first key
localidx_top=sizeof_ranges_t;-- initialize to index of last key (number of keys)
if(target<ranges_t[idx_bot][1])or(target>ranges_t[idx_top][2])then-- invalid; target out of range
return;-- abandon
end
localidx_mid;-- calculated index of range midway between top index and bottom index
localflag=false;-- flag to tell us when we've evaluated last (highest) range in <ranges_t>
while1do
idx_mid=math.ceil((idx_bot+idx_top)/2);-- get the mid-point in the <ranges_t> sequence
if(target>=ranges_t[idx_mid][1])and(target<=ranges_t[idx_mid][2])then-- indexed range low value <= target <= indexed range high value
returntrue;-- we found the range that holds the <target> character; return true
elseif(target>ranges_t[idx_mid][2])then-- is <target> > indexed range high value?
idx_bot=idx_mid;-- adjust <idx_bot> up
else-- here when <target> less than indexed range low value
idx_top=idx_mid-1;-- adjust <idx_top> down
end
ifflagthen
break;-- here when we just evaluated the last range and <target> not found
end
ifnotflagand(idx_bot==idx_top)then-- set true just before we evaluate the last (highest) range in <ranges_t>
flag=true;
end
end
end
--[[--------------------------< I S _ L A T I N >--------------------------------------------------------------
compare <text> as codepoints to lists of known codepoints accepted as Latn script
returns boolean true and modified <text> when <text> is wrapped in accept-as-written markup
returns boolean true and <text> when codepoint is known
returns boolean false, <text>, non-Latn codepoint position in <text> (left to right), and the codepoint character
	when codepoint is not known
TODO: when text has accept-as-written markup, return a non-boolean value to indicate that <text> is not wholly
	latn script?  Use that return value to create non-Latn HTML lang= attribute because <text> isn't really
	latn so lang=und (undetermined)? or instead, omit the -Latn subtag? (without -Latn need to force |italic=yes)
]]
localfunctionis_latin(text,tag)
localcount;
text,count=text:gsub('^%(%((.+)%)%)$','%1');-- remove accept-as-written markup if present
if0~=countthen
returntrue,text;-- markup present so assume that <text> is Latn-script
end
localpos=0;-- position counter for error messaging
forcodepointinmw.ustring.gcodepoint(text)do-- fetch each code point
pos=pos+1;-- bump the position counter
ifnotis_latn_data.singles_t[codepoint]and-- codepoint not found in the singles list?
notbinary_search(codepoint,is_latn_data.ranges_t)and-- codepoint not a member of a listed range?
not(tagandis_latn_data.specials_t[codepoint]andis_latn_data.specials_t[codepoint][tag])then-- not a language-specific codepoint?
returnfalse,text,pos,mw.ustring.char(codepoint);-- codepoint not known; return false with codepoint position and character representation
end
end
returntrue,text;-- is known; return <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 received from the template's frame (parent frame).
]]
localfunction_lang(args)
localout={};
locallanguage_name;-- used to make category names
localcategory_name;-- same as language_name except that it retains any parenthetical disambiguators (if any) from the data set
localsubtags={};-- IETF subtags script, region, variant, and private
localcode;-- the language code
localmsg;-- for error messages
localtag='span';-- initial value for make_text_html()
localtemplate=args.templateorcfg.templates_t.lang;
maint_cats={};-- initialize because when this module required into another module, these only declared once so only initialzed once
maint_msgs={};
validate_cat_args(args);-- determine if categorization should be suppressed
ifargs[1]andargs.codethen
returnmake_error_msg(substitute(cfg.lang_t.conflict_n_param,{'1',cfg.lang_t.conflict_n_param_types.code}),args,template);
else
args.code=args[1]orargs.code;-- prefer args.code
end
ifargs[2]andargs.textthen
returnmake_error_msg(substitute(cfg.lang_t.conflict_n_param,{'2',cfg.lang_t.conflict_n_param_types.text}),args,template);
else
args.text=args[2]orargs.text;-- prefer args.text
end
msg=validate_text(template,args);-- ensure that |text= is set
ifis_set(msg)then-- msg is an already-formatted error message
returnmsg;
end
args.text,tag=html_tag_select(args.text);-- inspects text; returns appropriate HTML tag with text trimmed accordingly
args.rtl=args.rtl==cfg.keywords_t.affirmative;-- convert to boolean: 'yes' -> true, other values -> false
args.proto,msg=validate_proto(args.proto);-- return boolean, or nil, or nil and error message flag
ifmsgthen
returnmake_error_msg(substitute(cfg.lang_t.invalid_proto,{msg}),args,template);
end
code,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}})
ifmsgthen
returnmake_error_msg(msg,args,template);
end
localis_latn_text,pos,char;
is_latn_text,args.text,pos,char=is_latin(args.text,code);-- make a boolean
msg=text_script_match_test(subtags.script,is_latn_text,pos,char)
ifmsgthen-- if an error detected then there is an error message
returnmake_error_msg(msg,args,template);
end
args.italic,msg=validate_italic(args);
ifmsgthen
returnmake_error_msg(msg,args,template);
end
ifnil==args.italicthen-- nil when |italic= absent or not set or |italic=default; args.italic controls
if('latn'==subtags.script)or-- script is latn
(this_wiki_lang_tag~=codeandnotis_set(subtags.script)andnothas_poem_tag(args.text)andis_latn_text)then-- text not this wiki's language, no script specified and not in poem markup but is wholly latn script (auto-italics)
args.italic='italic';-- DEFAULT for {{lang}} templates is upright; but if latn script set for font-style:italic
else
args.italic='inherit';-- italic not set; script not latn; inherit current style
end
end
ifis_set(subtags.script)then-- if script set, override rtl setting
ifin_array(subtags.script,lang_data.rtl_scripts)then
args.rtl=true;-- script is an rtl script
else
args.rtl=false;-- script is not an rtl script
end
end
args.code=format_ietf_tag(code,subtags.script,subtags.region,subtags.variant,subtags.private);-- format to recommended subtag styles
language_name=language_name_get(args.code,code,true);-- get language name; try IETF tag first, then code w/o variant then code w/ variant
ifcfg.keywords_t.invert==args.italicand'span'==tagthen-- invert only supported for in-line content
args.text=invert_italics(args.text)
end
args.text=proto_prefix(args.text,language_name,args.proto);-- prefix proto-language text with a splat
table.insert(out,make_text_html(args.code,args.text,tag,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 categories
returntable.concat(out);-- put it all together and done
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 received from the template's frame (parent frame).
]]
localfunctionlang(frame)
localargs_t=getArgs(frame,{-- this code so that we can detect and handle wiki list markup in text
valueFunc=function(key,value)
if2==keyor'text'==keythen-- the 'text' parameter; do not trim wite space
returnvalue;-- return untrimmed 'text'
elseifvaluethen-- all other values: if the value is not nil
value=mw.text.trim(value);-- trim whitespace
if''~=valuethen-- empty string when value was only whitespace
returnvalue;
end
end
returnnil;-- value was empty or contained only whitespace
end-- end of valueFunc
});
args_t.fn=nil;-- unset because not supported but this function might have been called by {{lang|fn=lang|...}}
localmsg=parameter_validate(args_t,cfg.templates_t.lang);-- verify that all supplied parameters are supported by {{lang-??}}
ifmsgthen
returnmake_error_msg(msg,args_t,cfg.templates_t.lang);-- when template has unsupported params, abandon with error message
end
return_lang(args_t);
end
--[[--------------------------< T R A N S L A T I O N _ M A K E >----------------------------------------------
Stand-alone function to create literal translation of main text.
Also used by {{lang-x2}}.
]]
localfunctiontranslation_make(args_t)
localtranslation_t={', '};-- initialize output
if'none'~=args_t.labelthen-- if we want a label
table.insert(translation_t,'<small>');-- open the <small> HTML tag
ifcfg.keywords_t.negative==args_t.linkthen
table.insert(translation_t,substitute('<abbr title="$1">$2</abbr>',{cfg.translation_make_t.lit_xlation,cfg.translation_make_t.lit_abbr}));-- unlinked form
else
table.insert(translation_t,make_wikilink(cfg.translation_make_t.lit_xlation,cfg.translation_make_t.lit_abbr));-- linked form
end
table.insert(translation_t,"&thinsp;</small>");-- close the <small> HTML tag
end
table.insert(translation_t,table.concat({-- user styling spans match spand from {{gloss}}
'<span class="gloss-quot">\'</span>',-- user styling span for quote marks; use HTML entities to avoid wiki markup confusion
'<span class="gloss-text">',-- open user styling span for the translation
args_t.translation,-- the translation
'</span>',-- close user styling span for the translation
'<span class="gloss-quot">\'</span>'-- user styling span for quote marks
}));
returntable.concat(translation_t);-- make a big string and done
end
--[[--------------------------< _ L A N G _ X X >--------------------------------------------------------------
For the {{lang-??}} templates, the only parameter required to be set in the template is the language code.  All
other parameters can, usually should, be written in the template call.  For {{lang-??}} templates for languages
that can have multiple writing systems, it may be appropriate to set |script= as well.
For each {{lang-??}} template choose the appropriate entry-point function so that this function knows the default
styling 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
	|region = IANA region code
	|variant = IANA variant code
	|text = (required) the displayed text in language specified by code
	|link = boolean false ('no') does not link code-spcified language name 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
	|cat = boolian false ('no') opposite form of |nocat=
	|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 disabled
	for those {{lang-??}} templates that support transliteration (those templates where |text= is not 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 code
For {{lang-??}}, the positional parameters are:
	{{{1}}}	text
	{{{2}}}	transliterated text
	{{{3}}}	literal translation text
no other positional parameters are allowed
]]
localfunction_lang_xx(args,base_template)-- base_template will be either of 'langx' or 'lang-xx'
localout={};
locallanguage_name;-- used to make display text, article links
localcategory_name;-- same as language_name except that it retains any parenthetical disambiguators (if any) from the data set
localsubtags={};-- IETF subtags script, region, and variant
localcode;-- the language code
localtranslit_script_name;-- name associated with IANA (ISO 15924) script code
localtranslit;
localmsg;-- for error messages
localtag='span';-- initial value for make_text_html()
localtemplate=args.templateorbase_template;
maint_cats={};-- initialize because when this module required into another module, these only declared once so only initialzed once
maint_msgs={};
localtext_idx=(cfg.templates_t.langx==base_template)and2or1;-- for {{langx}} 'text' positional parameter is '2'
localtranslit_idx=(cfg.templates_t.langx==base_template)and3or2;
localxlate_idx=(cfg.templates_t.langx==base_template)and4or3;
ifargs[text_idx]andargs.textthen
returnmake_error_msg(substitute(cfg.lang_t.conflict_n_param,{text_idx,cfg.lang_t.conflict_n_param_types.text}),args,template);
else
args.text=args[text_idx]orargs.text;-- prefer positional 'text' parameter
end
msg=validate_text(template,args);-- ensure that |text= is set, does not contain italic markup and is protected from improper bolding
ifis_set(msg)then
returnmsg;
end
args.text,tag=html_tag_select(args.text);-- inspects text; returns appropriate HTML tag with text trimmed accordingly
ifargs[translit_idx]andargs.translitthen
returnmake_error_msg(substitute(cfg.lang_t.conflict_n_param,{translit_idx,cfg.lang_t.conflict_n_param_types.translit}),args,template);
else
args.translit=args[translit_idx]orargs.translit-- prefer positional 'translit' parameter
end
args.engvar=cfg.engvar_sel_t[args.engvar]orcfg.default_engvar;-- |engvar= when valid; cfg.default_engvar else
ifargs[xlate_idx]and(args.translationorargs.lit)then
returnmake_error_msg(substitute(cfg.lang_xx_t.conflict_n_lit,{xlate_idx}),args,template);
elseifargs.translationandargs.litthen
returnmake_error_msg(cfg.lang_xx_t.conflict_lit,args,template);
else
args.translation=args[xlate_idx]orargs.translationorargs.lit;-- prefer positional 'translation' parameter
end
ifargs.linksandargs.linkthen
returnmake_error_msg(cfg.lang_xx_t.conflict_link,args,template);
else
args.link=args.linkorargs.links;-- prefer args.link
end
validate_cat_args(args);-- determine if categorization should be suppressed
args.rtl=args.rtl==cfg.keywords_t.affirmative;-- convert to boolean: 'yes' -> true, other values -> false
code,subtags.script,subtags.region,subtags.variant,subtags.private,msg=get_ietf_parts(args.code,args.script,args.region,args.variant);-- private omitted because private
ifmsgthen-- if an error detected then there is an error message
returnmake_error_msg(msg,args,template);
end
ifargs.translitthen
locallatn,pos,char;
latn,args.translit,pos,char=is_latin(args.translit,((''~=subtags.private)and(code..'-x-'..subtags.private))orcode);
ifnotlatnthen
returnmake_error_msg(substitute(cfg.lang_xx_t.translit_nonlatn,{pos,char}),args,template);
end
end
localis_latn_text,text,pos,char=is_latin(args.text,code);-- make a boolean
args.text=text;-- may have been modified (accept-as-written markup removed)
msg=text_script_match_test(subtags.script,is_latn_text,pos,char)
ifmsgthen-- if an error detected then there is an error message
returnmake_error_msg(msg,args,template);
end
args.italic,msg=validate_italic(args);
ifmsgthen
returnmake_error_msg(msg,args,template);
end
ifcfg.templates_t.langx==base_templatethen-- auto-italics  for {{langx}} templates; adapted from {{lang}} (no support for poem tag) 
ifnil==args.italicthen-- nil when |italic= absent or not set or |italic=default; args.italic controls
if('latn'==subtags.script)or-- script is latn
(this_wiki_lang_tag~=codeandnotis_set(subtags.script)andis_latn_text)then-- text is not this wiki's language, no script specified and is wholly latn script (auto-italics)
args.italic='italic';-- set font-style:italic
else
args.italic='inherit';-- italic not set; script not latn; inherit current style
end
end
else-- {{lang-xx}} does not do auto italics; retained for those wikis that don't support {{langx}}
ifnil==args.italicthen-- args.italic controls
ifis_set(subtags.script)then
if'latn'==subtags.scriptthen
args.italic='italic';-- |script=Latn; set for font-style:italic
else
args.italic=initial_style_state;-- italic not set; script is not latn; set for font-style:<initial_style_state>
end
else
args.italic=initial_style_state;-- here when |italic= and |script= not set; set for font-style:<initial_style_state>
end
end
end
ifis_set(subtags.script)then-- if script set override rtl setting
ifin_array(subtags.script,lang_data.rtl_scripts)then
args.rtl=true;-- script is an rtl script
else
args.rtl=false;-- script is not an rtl script
end
end
args.proto,msg=validate_proto(args.proto);-- return boolean, or nil, or nil and error message flag
ifmsgthen
returnmake_error_msg(substitute(cfg.lang_t.invalid_proto,{args.proto}),args,template);
end
args.code=format_ietf_tag(code,subtags.script,subtags.region,subtags.variant,subtags.private);-- format to recommended subtag styles
language_name=language_name_get(args.code,code,true);-- get language name; try IETF tag first, then code w/o variant then code w/ variant
category_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 them
ifargs.labelthen
if'none'~=args.labelthen
table.insert(out,table.concat({args.label,': '}));-- custom label
end
else
ifcfg.keywords_t.negative==args.linkthen
table.insert(out,language_name);-- language name without wikilink
else
ifmw.ustring.find(language_name,'languages',1,true)then
table.insert(out,make_wikilink(language_name));-- collective language name uses simple wikilink
elseiflang_data.article_name[args.code:lower()]then-- is IETF tag in article name over ride?
table.insert(out,make_wikilink(lang_data.article_name[args.code:lower()],language_name));-- language name with wikilink from override data
elseiflang_data.article_name[code]then-- is language tag in article override
table.insert(out,make_wikilink(lang_data.article_name[code],language_name));-- language name with wikilink from override data
else
table.insert(out,make_wikilink(substitute('$1 $2',{cfg.misc_text_t.language,language_name}),language_name));-- language name with wikilink
end
end
table.insert(out,': ');-- separator
end
ifcfg.keywords_t.invert==args.italicthen
args.text=invert_italics(args.text)
end
args.text=proto_prefix(args.text,language_name,args.proto);-- prefix proto-language text with a splat
table.insert(out,make_text_html(args.code,args.text,tag,args.rtl,args.italic,args.size,('none'==args.label)andlanguage_nameornil))
ifis_set(args.translit)andnotis_latn_textthen-- transliteration; not supported when args.text is wholly latn text (this is an imperfect test)
table.insert(out,', ');-- comma to separate text from translit
if'none'~=args.labelthen
table.insert(out,'<small>');
ifscript_table[args['translit-script']]then-- when |translit-script= is set, try to use the script's name
translit_script_name=script_table[args['translit-script']];
else
translit_script_name=language_name;-- fall back on language name
end
localtranslit_title_obj=mw.title.makeTitle(0,substitute('$1 $2',{cfg.lang_xx_t.romanization,translit_script_name}));-- make a title object; no engvar, article titles use US spelling
iftranslit_title_obj.existsand(cfg.keywords_t.negative~=args.link)then
table.insert(out,make_wikilink(substitute('$1 $2',{cfg.lang_xx_t.romanization,translit_script_nameorlanguage_name}),
substitute('$1',{cfg.engvar_t[args.engvar]['romanisz_pt']}))..':');-- make a wikilink if there is an article to link to; engvar the display text
else
table.insert(out,substitute('$1:',{cfg.engvar_t[args.engvar]['romanisz_pt']}));-- else plain text per engvar
end
table.insert(out,'&nbsp;</small>');-- close the small tag
end
translit=make_translit(args.code,language_name,args.translit,args['translit-std'],args['translit-script'],nil,args.engvar)
ifis_set(translit)then
table.insert(out,translit);
else
returnmake_error_msg(substitute('$1: $2',{cfg.lang_xx_t.invalid_xlit_std,args['translit-std']or'[missing]'}),args,template);
end
elseifis_set(args.translit)andis_latn_textthen-- when creating a transliteration of Latn script <text>
returnmake_error_msg(cfg.lang_xx_t.xlit_of_latn,args,template);-- emit error message and abandon
end
ifis_set(args.translation)then-- translation (not supported in {{lang}})
table.insert(out,translation_make(args));
end
table.insert(out,make_category(code,category_name,args.nocat));
table.insert(out,render_maint(args.nocat));-- maintenance messages and categories
returntable.concat(out);-- put it all together and done
end
--[[--------------------------< L A N G _ X X _ A R G S _ G E T >----------------------------------------------
Common function to get args table from {{lang-??}} templates.
Returns table of args.
Text positional parameters are not trimmed here but are selectively trimmed at html_tag_select().
]]
localfunctionlang_xx_args_get(frame,base_template)
localargs_t=getArgs(frame,
{
parentFirst=true,-- parameters in the template override parameters set in the {{#invoke:}}
valueFunc=function(key,value)
if((cfg.templates_t.langx==base_template)and2or1)==keythen-- the 'text' positional parameter; 1 for {{lang-??}}, 2 for {{langx}}; do not trim wite space
returnvalue;-- return untrimmed 'text' positional parameter
elseifvaluethen-- all other values: if the value is not nil
value=mw.text.trim(value);-- trim whitespace
if''~=valuethen-- empty string when value was only whitespace
returnvalue;
end
end
returnnil;-- value was empty or contained only whitespace
end-- end of valueFunc
});
returnargs_t;
end
--[[--------------------------< L A N G _ X X _ I T A L I C >--------------------------------------------------
Entry point for those {{lang-??}} templates that call lang_xx_italic(). Sets the initial style state to italic.
]]
localfunctionlang_xx_italic(frame)
localargs=lang_xx_args_get(frame,cfg.templates_t.langxx);
args.fn=nil;-- unset because not supported but this function might have been called by {{lang|fn=lang_xx_italic|...}}
localmsg=parameter_validate(args,cfg.templates_t.langxx);-- verify that all supplied parameters are supported by {{lang-??}}
ifmsgthen
returnmake_error_msg(msg,args,cfg.templates_t.langxx);-- when template has unsupported params, abandon with error message
end
initial_style_state='italic';
return_lang_xx(args,cfg.templates_t.langxx)..'[[Kategori:Halaman yang menggunakan templat Lang-xx]]';-- temporary category
end
--[[--------------------------< _ L A N G _ X X _ I T A L I C >------------------------------------------------
Entry point from another module. Sets the initial style state to italic.
]]
localfunction_lang_xx_italic(args)
initial_style_state='italic';
return_lang_xx(args,cfg.templates_t.langxx);
end
--[[--------------------------< L A N G _ X X _ I N H E R I T >------------------------------------------------
Entry point for those {{lang-??}} templates that call lang_xx_inherit(). Sets the initial style state to inherit.
]]
localfunctionlang_xx_inherit(frame)
localargs=lang_xx_args_get(frame,cfg.templates_t.langxx);
args.fn=nil;-- unset because not supported but this function might have been called by {{lang|fn=lang_xx_inherit|...}}
localmsg=parameter_validate(args,cfg.templates_t.langxx);-- verify that all supplied parameters are supported by {{lang-??}}
ifmsgthen
returnmake_error_msg(msg,args,cfg.templates_t.langxx);-- when template has unsupported params, abandon with error message
end
initial_style_state='inherit';
return_lang_xx(args,cfg.templates_t.langxx)..'[[Kategori:Halaman yang menggunakan templat Lang-xx]]';-- temporary category
end
--[[--------------------------< _ L A N G _ X X _ I N H E R I T >----------------------------------------------
Entry point from another module. Sets the initial style state to inherit.
]]
localfunction_lang_xx_inherit(args)
initial_style_state='inherit';
return_lang_xx(args,cfg.templates_t.langxx);
end
--[[--------------------------< _ L A N G X >------------------------------------------------------------------
Entry point from another module.
]]
localfunction_langx(args_t)
locallangx_data=mw.loadData('Modul:Lang/langx');-- get necessary data 
localrtl_t=langx_data.rtl_t;-- get list of language tags for languages that are rendered right-to-left
locallink_t=langx_data.link_t;-- get list of language tags for {{lang-??}} templates that set |link=<something>
localsize_t=langx_data.size_t;-- get list of language tags for {{lang-??}} templates that set |size=<something>
localmsg=parameter_validate(args_t,cfg.templates_t.langx);
ifmsgthen
returnmake_error_msg(msg,args_t,cfg.templates_t.langx);
end
args_t.code=args_t[1]orargs_t.code;-- get the language tag; must be {{{1}}} or |code=
ifnotargs_t.codethen
returnmake_error_msg(cfg.get_ietf_parts_t.missing_lang_tag,args_t,cfg.templates_t.langx);
end
args_t.rtl=args_t.rtlor(rtl_t[args_t.code]andcfg.keywords_t.affirmative);-- prefer |rtl= in template call, use rtl_t else
args_t.link=args_t.linkorlink_t[args_t.code];-- prefer |link= in template call, use link_t felse
args_t.size=args_t.sizeorsize_t[args_t.code];-- prefer |size= in template call, use size_t else
args_t[1]=nil;-- unset to mimic {{lang-??}} templates which set |code=xx
locallang_subtag=args_t.code;-- use only the base language subtag for unsupported tag test; some args_t.code are modified by |script= etc
return_lang_xx(args_t,cfg.templates_t.langx);
end
--[[--------------------------< L A N G X >--------------------------------------------------------------------
Entry point for {{langx}}.
this function calls _lang_xx() to render non-English text. The {{lang-??}} templates have three positional paramters
but {{langx}} has four:
				|  1	|  2		|  3		|  4	
	{{lang-xx	|<text>	|<xlit>		|<xlat>		}}
	{{langx		|<tag>	|<text>		|<xlit>		|<xlat>		}}
The calls to lang_xx_args_get() and _lang_xx() use 'langx' as a flag for those functions to select the proper
positional parameters.
{{lang-??}} depends on the calling template to select 'inherit' or 'italic' to establish the default rendering.
{{langx}} can't do that.  The initial version of {{langx}} relied on a list of language tags (inherit_t in ~/langx)
scraped from those {{lang-??}} templates that call lang_xx_inherit() to render text in upright font. langx() now
uses auto-italics code adapted from {{lang}} (doesn't support poem tags).
]]
localfunctionlangx(frame)
localargs_t=lang_xx_args_get(frame,cfg.templates_t.langx);-- get the arguments; 'langx' is the <base_template> used to decide which positional param is 'text', 'translit', 'lit'
return_langx(args_t);
end
--[[--------------------------< _ I S _ I E T F _ T A G >------------------------------------------------------
Returns true when a language name associated with IETF language tag exists; nil else.  IETF language tag must be valid.
All code combinations supported by {{lang}} and the {{lang-??}} templates are supported by this function.
Module entry point from another module.
]]
localfunction_is_ietf_tag(tag)-- entry point when this module is require()d into another
localc,s,r,v,p,err;-- code, script, region, variant, private, error message
c,s,r,v,p,err=get_ietf_parts(tag);-- disassemble tag into constituent part and validate
return((candnoterr)andtrue)ornil;-- return true when code portion has a value without error message; nil else
end
--[[--------------------------< I S _ I E T F _ T A G >--------------------------------------------------------
Module entry point from an {{#invoke:}}.
]]
localfunctionis_ietf_tag(frame)
return_is_ietf_tag(getArgs(frame)[1]);-- args[1] is the IETF language tag to be tested; also get parent frame
end
--[[--------------------------< I S _ I E T F _ T A G _ F R A M E >--------------------------------------------
Module entry point from an {{#invoke:}}; same as is_ietf_tag() except does not get parameters from the parent
(template) frame.  This function not useful when called by {{lang|fn=is_ietf_tag_frame|<tag>}} because <tag>
is in the parent frame.
]]
localfunctionis_ietf_tag_frame(frame)
return_is_ietf_tag(getArgs(frame,{frameOnly=true,})[1]);-- args[1] is the IETF language tag to be tested; do not get parent frame
end
--[[--------------------------< _ N A M E _ F R O M _ T A G >--------------------------------------------------
Returns language name associated with IETF language tag if valid; error message else.
All code combinations supported by {{lang}} and the {{lang-??}} templates are supported by this function.
Set invoke's |link= parameter to yes to get wikilinked version of the language name.
Module entry point from another module.
]]
localfunction_name_from_tag(args)
localsubtags={};-- IETF subtags script, region, variant, and private
localraw_code=args[1];-- save a copy of the input IETF subtag
locallink=cfg.keywords_t.affirmative==args['link'];-- make a boolean
locallabel=args.label;
localcode;-- the language code
localmsg;-- gets an error message if IETF language tag is malformed or invalid
locallanguage_name='';
code,subtags.script,subtags.region,subtags.variant,subtags.private,msg=get_ietf_parts(raw_code);
ifmsgthen
localtemplate=(args['template']andtable.concat({'{{',args['template'],'}}: '}))or'';-- make template name (if provided by the template)
returnmake_error_span(template,msg);
end
raw_code=format_ietf_tag(code,subtags.script,subtags.region,subtags.variant,subtags.private);-- format to recommended subtag styles; private omitted because private
language_name=language_name_get(raw_code,code);-- get language name; try IETF tag first, then code w/o variant then code w/ variant
if'yes'~=args.rawthen
language_name=language_name:gsub('%s+%b()','');-- remove IANA parenthetical disambiguators or qualifiers from names that have them
end
iflinkthen-- when |link=yes, wikilink the language name
ifmw.ustring.find(language_name,'languages',1,true)then
language_name=make_wikilink(language_name,label);-- collective language name uses simple wikilink
elseiflang_data.article_name[raw_code:lower()]then-- is IETF tag in article name override?
language_name=make_wikilink(lang_data.article_name[raw_code:lower()],labelorlanguage_name);-- language name with wikilink from override data
elseiflang_data.article_name[code]then-- is language tag in article name override?
language_name=make_wikilink(lang_data.article_name[code],labelorlanguage_name);-- language name with wikilink from override data
else
language_name=make_wikilink(substitute('$1 $2',{cfg.misc_text_t.language,language_name}),labelorlanguage_name);-- language name with wikilink
end
end
returnlanguage_name;
end
--[[--------------------------< N A M E _ F R O M _ T A G >----------------------------------------------------
Module entry point from an {{#invoke:}}.
]]
localfunctionname_from_tag(frame)-- entry point from an {{#invoke:lang|name_from_tag|<IETF tag>|link=<yes>|template=<template name>}}
return_name_from_tag(getArgs(frame))-- pass-on the args table, nothing else; getArgs() so we also get parent frame
end
--[[--------------------------< _ T A G _ F R O M _ N A M E >--------------------------------------------------
Returns the IETF language tag associated with the language name.  Spelling of language name must be correct
according to the spelling in the source tables.  When a standard language name has a parenthetical disambiguator,
that disambiguator must be omitted (they are not present in the data name-to-tag tables).
Module entry point from another module.
]]
localfunction_tag_from_name(args)-- entry point from another module
localmsg;
ifargs[1]and''~=args[1]then
localdata=mw.loadData('Modul:Lang/tag from name');-- get the reversed data tables TODO: change when going live
locallang=args[1]:lower();-- allow any-case for the language name (speeling must till be correct)
localtag=data.rev_override_table[lang]ordata.rev_lang_table[lang]ordata.rev_lang_dep_table[lang];-- get the code; look first in the override then in the standard
iftagthen
returntag,true;-- language name found so return tag and done; second return used by is_lang_name()
else
msg=substitute(cfg.tag_from_name_t.lang_not_found,{args[1]});-- language name not found, error message
end
else
msg=cfg.tag_from_name_t.missing_lang_name;-- language name not found, error message
end
localtemplate='';
ifargs.templateand''~=args.templatethen
template=table.concat({'{{',args['template'],'}}: '});-- make template name (if provided by the template)
end
returnmake_error_span(template,msg);
end
--[[--------------------------< T A G _ F R O M _ N A M E >----------------------------------------------------
Module entry point from an {{#invoke:}}.
]]
localfunctiontag_from_name(frame)-- entry point from an {{#invoke:lang|tag_from_name|<language name>|link=<yes>|template=<template name>}}
localresult,_=_tag_from_name(getArgs(frame))-- pass-on the args table, nothing else; getArgs() so we also get parent frame; supress second return used by is_lang_name()
returnresult;
end
--[[--------------------------< I S _ L A N G _ N A M E >------------------------------------------------------
Module entry point from an {{#invoke:}}.
]]
localfunctionis_lang_name(frame)
local_,result=_tag_from_name(getArgs(frame))-- pass-on the args table, nothing else; getArgs() so we also get parent frame; supress second return used by tag_from_name()
returnresultandtrueornil;
end
--[[--------------------------< _ X L I T >--------------------------------------------------------------------
Module entry point from another module.
]]
localfunction_xlit(args)
localtitle_table=lang_data.translit_title_table;-- table of transliteration standards and the language codes and scripts that apply to those standards
locallanguage_name;-- language name that matches language code; used for tool tip
localtranslit;-- transliterated text to display
localscript;-- IANA script
localmsg;-- for when called functions return an error message
localtemplate=args.templateorcfg.templates_t.transliteration;
maint_cats={};-- initialize because when this module required into another module, these only declared once so only initialzed once
maint_msgs={};
ifis_set(args[3])then-- [3] set when {{transliteration|code|standard|text}}
args.text=args[3];-- get the transliterated text
args.translit_std=args[2]andargs[2]:lower();-- get the standard; lower case for table indexing
ifnottitle_table[args.translit_std]then
returnmake_error_msg(substitute(cfg.transl_t.unrecog_xlit_std,{args.translit_std}),args,template);
end
else
ifis_set(args[2])then-- [2] set when {{transliteration|code|text}}
args.text=args[2];-- get the transliterated text
else
ifargs[1]and(args[1]:match('^%a%a%a?%a?$')or-- args[2] missing; is args[1] a language or script tag or is it the transliterated text?
args[1]:match('^%a%a%a?%-x%-'))then-- or is args[1] a private-use tag
returnmake_error_msg(cfg.transl_t.no_text,args,template);-- args[1] is a code so we're missing text
else
args.text=args[1];-- args[1] is not a code so we're missing that; assign args.text for error message
returnmake_error_msg(cfg.transl_t.missing_lang_scr,args,template);
end
end
end
ifis_set(args[1])then-- IANA language code used for HTML lang= attribute; or ISO 15924 script code
ifargs[1]:match('^%a%a%a?%a?$')orargs[1]:match('^%a%a%a?%-x%-')then-- args[1] has correct form?
args.code=args[1]:lower();-- use the language/script code; only (2, 3, or 4 alpha characters) or private-use; lower case because table indexes are lower case
else
returnmake_error_msg(substitute(cfg.transl_t.unrecog_lang_scr,{args[1]}),args,template);-- invalid language / script code
end
else
returnmake_error_msg(cfg.transl_t.missing_lang_scr,args,template);-- missing language / script code so quit
end
localis_latn_text,pos,char;
is_latn_text,args.text,pos,char=is_latin(args.text,args.code);-- is latn text? strip accept-as-written markup
ifnotis_latn_textthen-- when text is not latn
returnmake_error_msg(substitute(cfg.lang_xx_t.translit_nonlatn,{pos,char}),args,template);-- abandon with error message
end
args.italic,msg=validate_italic(args);
ifmsgthen
returnmake_error_msg(msg,args,template);
end
if'italic'==args.italicthen-- 'italic' when |italic=yes; because that is same as absent or not set and |italic=default
args.italic=nil;-- set to nil; 
end
args.engvar=cfg.engvar_sel_t[args.engvar]orcfg.default_engvar;-- |engvar= when valid; cfg.default_engvar else
ifoverride_table[args.code]then-- is code a language code defined in the override table?
language_name=override_table[args.code];
args.code=args.code:match('^%a%a%a?');-- if private use, strip all but language subtag
elseiflang_table[args.code]then-- is code a language code defined in the standard language code tables?
language_name=lang_table[args.code];
elseiflang_dep_table[args.code]then-- is code a language code defined in the deprecated language code tables?
language_name=lang_dep_table[args.code];
elseifscript_table[args.code]then-- if here, code is not a language code; is it a script code?
language_name=script_table[args.code];
script=args.code;-- code was an ISO 15924 script so use that instead
args.code='';-- unset because not a language code
else
returnmake_error_msg(substitute(cfg.transl_t.unrecog_lang_scr,{args.code}),args,template);-- invalid language / script code
end
-- here only when all parameters passed to make_translit() are valid
returnmake_translit(args.code,language_name,args.text,args.translit_std,script,args.italic,args.engvar);
end
--[[--------------------------< X L I T >----------------------------------------------------------------------
Module entry point from an {{#invoke:}}.
]]
localfunctionxlit(frame)
return_xlit(getArgs(frame));
end
--[[--------------------------< C A T E G O R Y _ F R O M _ T A G >--------------------------------------------
Returns category name associated with IETF language tag if valid; error message else.
All code combinations supported by {{lang}} and the {{lang-??}} templates are supported by this function.
Module entry point from another module.
]]
localfunction_category_from_tag(args_t)
localsubtags={};-- IETF subtags script, region, variant, and private
localraw_code=args_t[1];-- save a copy of the input IETF subtag
locallink=cfg.keywords_t.affirmative==args_t.link;-- make a boolean
locallabel=args_t.label;
localcode;-- the language code
localmsg;-- gets an error message if IETF language tag is malformed or invalid
localcategory_name='';
code,subtags.script,subtags.region,subtags.variant,subtags.private,msg=get_ietf_parts(raw_code);
ifmsgthen
localtemplate=(args_t.templateandtable.concat({'{{',args_t.template,'}}: '}))or'';-- make template name (if provided by the template)
returnmake_error_span(template,msg);
end
raw_code=format_ietf_tag(code,subtags.script,subtags.region,subtags.variant,subtags.private);-- format to recommended subtag styles; private omitted because private
category_name=language_name_get(raw_code,code);-- get language name; try IETF tag first, then code w/o variant then code w/ variant
category_name=make_category(code,category_name,nil,true):gsub('[%[%]]','');
iflinkthen
returntable.concat({'[[:',category_name,']]'});
else
returncategory_name;
end
end
--[[--------------------------< C A T E G O R Y _ F R O M _ T A G >--------------------------------------------
Module entry point from an {{#invoke:}}.
]]
localfunctioncategory_from_tag(frame)-- entry point from an {{#invoke:lang|category_from_tag|<IETF tag>|template=<template name>}}
return_category_from_tag(getArgs(frame));-- pass-on the args table, nothing else; getArgs() so we also get parent frame
end
--[[--------------------------< E X P O R T E D   F U N C T I O N S >------------------------------------------
]]
return{
category_from_tag=category_from_tag,-- frame entry points when this module is #invoke:ed into templates/wikitext
lang=lang,-- entry point for {{lang}}
langx=langx,-- entry point for {{langx}}
lang_xx_inherit=lang_xx_inherit,-- entry points for {{lang-??}}
lang_xx_italic=lang_xx_italic,
is_ietf_tag=is_ietf_tag,
is_ietf_tag_frame=is_ietf_tag_frame,
is_lang_name=is_lang_name,
tag_from_name=tag_from_name,-- returns IETF tag associated with language name
name_from_tag=name_from_tag,-- used for template documentation; possible use in ISO 639 name from code templates
xlit=xlit,-- entry point for {{transliteration}}
_category_from_tag=_category_from_tag,-- API entry points when this module is require()d into other modules
_lang=_lang,
_langx=_langx,
_lang_xx_inherit=_lang_xx_inherit,
_lang_xx_italic=_lang_xx_italic,
_is_ietf_tag=_is_ietf_tag,
get_ietf_parts=get_ietf_parts,
_tag_from_name=_tag_from_name,
_name_from_tag=_name_from_tag,
_xlit=_xlit,
_translation_make=translation_make,
};